git.oblomov.eu Git - linux-2.6/blob - drivers/net/wireless/iwlwifi/iwl4965-base.c

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2007 Intel Corporation. All rights reserved.
   4  *
   5  * Portions of this file are derived from the ipw3945 project, as well
   6  * as portions of the ieee80211 subsystem header files.
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of version 2 of the GNU General Public License as
  10  * published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  20  *
  21  * The full GNU General Public License is included in this distribution in the
  22  * file called LICENSE.
  23  *
  24  * Contact Information:
  25  * James P. Ketrenos <ipw2100-admin@linux.intel.com>
  26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27  *
  28  *****************************************************************************/
  29
  30 /*
  31  * NOTE:  This file (iwl-base.c) is used to build to multiple hardware targets
  32  * by defining IWL to either 3945 or 4965.  The Makefile used when building
  33  * the base targets will create base-3945.o and base-4965.o
  34  *
  35  * The eventual goal is to move as many of the #if IWL / #endif blocks out of
  36  * this file and into the hardware specific implementation files (iwl-XXXX.c)
  37  * and leave only the common (non #ifdef sprinkled) code in this file
  38  */
  39
  40 #include <linux/kernel.h>
  41 #include <linux/module.h>
  42 #include <linux/version.h>
  43 #include <linux/init.h>
  44 #include <linux/pci.h>
  45 #include <linux/dma-mapping.h>
  46 #include <linux/delay.h>
  47 #include <linux/skbuff.h>
  48 #include <linux/netdevice.h>
  49 #include <linux/wireless.h>
  50 #include <linux/firmware.h>
  51 #include <linux/etherdevice.h>
  52 #include <linux/if_arp.h>
  53
  54 #include <net/ieee80211_radiotap.h>
  55 #include <net/mac80211.h>
  56
  57 #include <asm/div64.h>
  58
  59 #define IWL 4965
  60
  61 #include "iwlwifi.h"
  62 #include "iwl-4965.h"
  63 #include "iwl-helpers.h"
  64
  65 #ifdef CONFIG_IWLWIFI_DEBUG
  66 u32 iwl_debug_level;
  67 #endif
  68
  69 /******************************************************************************
  70  *
  71  * module boiler plate
  72  *
  73  ******************************************************************************/
  74
  75 /* module parameters */
  76 int iwl_param_disable_hw_scan;
  77 int iwl_param_debug;
  78 int iwl_param_disable;      /* def: enable radio */
  79 int iwl_param_antenna;      /* def: 0 = both antennas (use diversity) */
  80 int iwl_param_hwcrypto;     /* def: using software encryption */
  81 int iwl_param_qos_enable = 1;
  82 int iwl_param_queues_num = IWL_MAX_NUM_QUEUES;
  83
  84 /*
  85  * module name, copyright, version, etc.
  86  * NOTE: DRV_NAME is defined in iwlwifi.h for use by iwl-debug.h and printk
  87  */
  88
  89 #define DRV_DESCRIPTION "Intel(R) Wireless WiFi Link 4965AGN driver for Linux"
  90
  91 #ifdef CONFIG_IWLWIFI_DEBUG
  92 #define VD "d"
  93 #else
  94 #define VD
  95 #endif
  96
  97 #ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
  98 #define VS "s"
  99 #else
 100 #define VS
 101 #endif
 102
 103 #define IWLWIFI_VERSION "1.1.17k" VD VS
 104 #define DRV_COPYRIGHT   "Copyright(c) 2003-2007 Intel Corporation"
 105 #define DRV_VERSION     IWLWIFI_VERSION
 106
 107 /* Change firmware file name, using "-" and incrementing number,
 108  *   *only* when uCode interface or architecture changes so that it
 109  *   is not compatible with earlier drivers.
 110  * This number will also appear in << 8 position of 1st dword of uCode file */
 111 #define IWL4965_UCODE_API "-1"
 112
 113 MODULE_DESCRIPTION(DRV_DESCRIPTION);
 114 MODULE_VERSION(DRV_VERSION);
 115 MODULE_AUTHOR(DRV_COPYRIGHT);
 116 MODULE_LICENSE("GPL");
 117
 118 __le16 *ieee80211_get_qos_ctrl(struct ieee80211_hdr *hdr)
 119 {
 120         u16 fc = le16_to_cpu(hdr->frame_control);
 121         int hdr_len = ieee80211_get_hdrlen(fc);
 122
 123         if ((fc & 0x00cc) == (IEEE80211_STYPE_QOS_DATA | IEEE80211_FTYPE_DATA))
 124                 return (__le16 *) ((u8 *) hdr + hdr_len - QOS_CONTROL_LEN);
 125         return NULL;
 126 }
 127
 128 static const struct ieee80211_hw_mode *iwl_get_hw_mode(
 129                 struct iwl_priv *priv, int mode)
 130 {
 131         int i;
 132
 133         for (i = 0; i < 3; i++)
 134                 if (priv->modes[i].mode == mode)
 135                         return &priv->modes[i];
 136
 137         return NULL;
 138 }
 139
 140 static int iwl_is_empty_essid(const char *essid, int essid_len)
 141 {
 142         /* Single white space is for Linksys APs */
 143         if (essid_len == 1 && essid[0] == ' ')
 144                 return 1;
 145
 146         /* Otherwise, if the entire essid is 0, we assume it is hidden */
 147         while (essid_len) {
 148                 essid_len--;
 149                 if (essid[essid_len] != '\0')
 150                         return 0;
 151         }
 152
 153         return 1;
 154 }
 155
 156 static const char *iwl_escape_essid(const char *essid, u8 essid_len)
 157 {
 158         static char escaped[IW_ESSID_MAX_SIZE * 2 + 1];
 159         const char *s = essid;
 160         char *d = escaped;
 161
 162         if (iwl_is_empty_essid(essid, essid_len)) {
 163                 memcpy(escaped, "<hidden>", sizeof("<hidden>"));
 164                 return escaped;
 165         }
 166
 167         essid_len = min(essid_len, (u8) IW_ESSID_MAX_SIZE);
 168         while (essid_len--) {
 169                 if (*s == '\0') {
 170                         *d++ = '\\';
 171                         *d++ = '0';
 172                         s++;
 173                 } else
 174                         *d++ = *s++;
 175         }
 176         *d = '\0';
 177         return escaped;
 178 }
 179
 180 static void iwl_print_hex_dump(int level, void *p, u32 len)
 181 {
 182 #ifdef CONFIG_IWLWIFI_DEBUG
 183         if (!(iwl_debug_level & level))
 184                 return;
 185
 186         print_hex_dump(KERN_DEBUG, "iwl data: ", DUMP_PREFIX_OFFSET, 16, 1,
 187                         p, len, 1);
 188 #endif
 189 }
 190
 191 /*************** DMA-QUEUE-GENERAL-FUNCTIONS  *****
 192  * DMA services
 193  *
 194  * Theory of operation
 195  *
 196  * A queue is a circular buffers with 'Read' and 'Write' pointers.
 197  * 2 empty entries always kept in the buffer to protect from overflow.
 198  *
 199  * For Tx queue, there are low mark and high mark limits. If, after queuing
 200  * the packet for Tx, free space become < low mark, Tx queue stopped. When
 201  * reclaiming packets (on 'tx done IRQ), if free space become > high mark,
 202  * Tx queue resumed.
 203  *
 204  * The IWL operates with six queues, one receive queue in the device's
 205  * sram, one transmit queue for sending commands to the device firmware,
 206  * and four transmit queues for data.
 207  ***************************************************/
 208
 209 static int iwl_queue_space(const struct iwl_queue *q)
 210 {
 211         int s = q->last_used - q->first_empty;
 212
 213         if (q->last_used > q->first_empty)
 214                 s -= q->n_bd;
 215
 216         if (s <= 0)
 217                 s += q->n_window;
 218         /* keep some reserve to not confuse empty and full situations */
 219         s -= 2;
 220         if (s < 0)
 221                 s = 0;
 222         return s;
 223 }
 224
 225 /* XXX: n_bd must be power-of-two size */
 226 static inline int iwl_queue_inc_wrap(int index, int n_bd)
 227 {
 228         return ++index & (n_bd - 1);
 229 }
 230
 231 /* XXX: n_bd must be power-of-two size */
 232 static inline int iwl_queue_dec_wrap(int index, int n_bd)
 233 {
 234         return --index & (n_bd - 1);
 235 }
 236
 237 static inline int x2_queue_used(const struct iwl_queue *q, int i)
 238 {
 239         return q->first_empty > q->last_used ?
 240                 (i >= q->last_used && i < q->first_empty) :
 241                 !(i < q->last_used && i >= q->first_empty);
 242 }
 243
 244 static inline u8 get_cmd_index(struct iwl_queue *q, u32 index, int is_huge)
 245 {
 246         if (is_huge)
 247                 return q->n_window;
 248
 249         return index & (q->n_window - 1);
 250 }
 251
 252 static int iwl_queue_init(struct iwl_priv *priv, struct iwl_queue *q,
 253                           int count, int slots_num, u32 id)
 254 {
 255         q->n_bd = count;
 256         q->n_window = slots_num;
 257         q->id = id;
 258
 259         /* count must be power-of-two size, otherwise iwl_queue_inc_wrap
 260          * and iwl_queue_dec_wrap are broken. */
 261         BUG_ON(!is_power_of_2(count));
 262
 263         /* slots_num must be power-of-two size, otherwise
 264          * get_cmd_index is broken. */
 265         BUG_ON(!is_power_of_2(slots_num));
 266
 267         q->low_mark = q->n_window / 4;
 268         if (q->low_mark < 4)
 269                 q->low_mark = 4;
 270
 271         q->high_mark = q->n_window / 8;
 272         if (q->high_mark < 2)
 273                 q->high_mark = 2;
 274
 275         q->first_empty = q->last_used = 0;
 276
 277         return 0;
 278 }
 279
 280 static int iwl_tx_queue_alloc(struct iwl_priv *priv,
 281                               struct iwl_tx_queue *txq, u32 id)
 282 {
 283         struct pci_dev *dev = priv->pci_dev;
 284
 285         if (id != IWL_CMD_QUEUE_NUM) {
 286                 txq->txb = kmalloc(sizeof(txq->txb[0]) *
 287                                    TFD_QUEUE_SIZE_MAX, GFP_KERNEL);
 288                 if (!txq->txb) {
 289                         IWL_ERROR("kmalloc for auxilary BD "
 290                                   "structures failed\n");
 291                         goto error;
 292                 }
 293         } else
 294                 txq->txb = NULL;
 295
 296         txq->bd = pci_alloc_consistent(dev,
 297                         sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX,
 298                         &txq->q.dma_addr);
 299
 300         if (!txq->bd) {
 301                 IWL_ERROR("pci_alloc_consistent(%zd) failed\n",
 302                           sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX);
 303                 goto error;
 304         }
 305         txq->q.id = id;
 306
 307         return 0;
 308
 309  error:
 310         if (txq->txb) {
 311                 kfree(txq->txb);
 312                 txq->txb = NULL;
 313         }
 314
 315         return -ENOMEM;
 316 }
 317
 318 int iwl_tx_queue_init(struct iwl_priv *priv,
 319                       struct iwl_tx_queue *txq, int slots_num, u32 txq_id)
 320 {
 321         struct pci_dev *dev = priv->pci_dev;
 322         int len;
 323         int rc = 0;
 324
 325         /* alocate command space + one big command for scan since scan
 326          * command is very huge the system will not have two scan at the
 327          * same time */
 328         len = sizeof(struct iwl_cmd) * slots_num;
 329         if (txq_id == IWL_CMD_QUEUE_NUM)
 330                 len +=  IWL_MAX_SCAN_SIZE;
 331         txq->cmd = pci_alloc_consistent(dev, len, &txq->dma_addr_cmd);
 332         if (!txq->cmd)
 333                 return -ENOMEM;
 334
 335         rc = iwl_tx_queue_alloc(priv, txq, txq_id);
 336         if (rc) {
 337                 pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
 338
 339                 return -ENOMEM;
 340         }
 341         txq->need_update = 0;
 342
 343         /* TFD_QUEUE_SIZE_MAX must be power-of-two size, otherwise
 344          * iwl_queue_inc_wrap and iwl_queue_dec_wrap are broken. */
 345         BUILD_BUG_ON(TFD_QUEUE_SIZE_MAX & (TFD_QUEUE_SIZE_MAX - 1));
 346         iwl_queue_init(priv, &txq->q, TFD_QUEUE_SIZE_MAX, slots_num, txq_id);
 347
 348         iwl_hw_tx_queue_init(priv, txq);
 349
 350         return 0;
 351 }
 352
 353 /**
 354  * iwl_tx_queue_free - Deallocate DMA queue.
 355  * @txq: Transmit queue to deallocate.
 356  *
 357  * Empty queue by removing and destroying all BD's.
 358  * Free all buffers.  txq itself is not freed.
 359  *
 360  */
 361 void iwl_tx_queue_free(struct iwl_priv *priv, struct iwl_tx_queue *txq)
 362 {
 363         struct iwl_queue *q = &txq->q;
 364         struct pci_dev *dev = priv->pci_dev;
 365         int len;
 366
 367         if (q->n_bd == 0)
 368                 return;
 369
 370         /* first, empty all BD's */
 371         for (; q->first_empty != q->last_used;
 372              q->last_used = iwl_queue_inc_wrap(q->last_used, q->n_bd))
 373                 iwl_hw_txq_free_tfd(priv, txq);
 374
 375         len = sizeof(struct iwl_cmd) * q->n_window;
 376         if (q->id == IWL_CMD_QUEUE_NUM)
 377                 len += IWL_MAX_SCAN_SIZE;
 378
 379         pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
 380
 381         /* free buffers belonging to queue itself */
 382         if (txq->q.n_bd)
 383                 pci_free_consistent(dev, sizeof(struct iwl_tfd_frame) *
 384                                     txq->q.n_bd, txq->bd, txq->q.dma_addr);
 385
 386         if (txq->txb) {
 387                 kfree(txq->txb);
 388                 txq->txb = NULL;
 389         }
 390
 391         /* 0 fill whole structure */
 392         memset(txq, 0, sizeof(*txq));
 393 }
 394
 395 const u8 BROADCAST_ADDR[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
 396
 397 /*************** STATION TABLE MANAGEMENT ****
 398  *
 399  * NOTE:  This needs to be overhauled to better synchronize between
 400  * how the iwl-4965.c is using iwl_hw_find_station vs. iwl-3945.c
 401  *
 402  * mac80211 should also be examined to determine if sta_info is duplicating
 403  * the functionality provided here
 404  */
 405
 406 /**************************************************************/
 407
 408 #if 0 /* temparary disable till we add real remove station */
 409 static u8 iwl_remove_station(struct iwl_priv *priv, const u8 *addr, int is_ap)
 410 {
 411         int index = IWL_INVALID_STATION;
 412         int i;
 413         unsigned long flags;
 414
 415         spin_lock_irqsave(&priv->sta_lock, flags);
 416
 417         if (is_ap)
 418                 index = IWL_AP_ID;
 419         else if (is_broadcast_ether_addr(addr))
 420                 index = priv->hw_setting.bcast_sta_id;
 421         else
 422                 for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++)
 423                         if (priv->stations[i].used &&
 424                             !compare_ether_addr(priv->stations[i].sta.sta.addr,
 425                                                 addr)) {
 426                                 index = i;
 427                                 break;
 428                         }
 429
 430         if (unlikely(index == IWL_INVALID_STATION))
 431                 goto out;
 432
 433         if (priv->stations[index].used) {
 434                 priv->stations[index].used = 0;
 435                 priv->num_stations--;
 436         }
 437
 438         BUG_ON(priv->num_stations < 0);
 439
 440 out:
 441         spin_unlock_irqrestore(&priv->sta_lock, flags);
 442         return 0;
 443 }
 444 #endif
 445
 446 static void iwl_clear_stations_table(struct iwl_priv *priv)
 447 {
 448         unsigned long flags;
 449
 450         spin_lock_irqsave(&priv->sta_lock, flags);
 451
 452         priv->num_stations = 0;
 453         memset(priv->stations, 0, sizeof(priv->stations));
 454
 455         spin_unlock_irqrestore(&priv->sta_lock, flags);
 456 }
 457
 458 u8 iwl_add_station(struct iwl_priv *priv, const u8 *addr, int is_ap, u8 flags)
 459 {
 460         int i;
 461         int index = IWL_INVALID_STATION;
 462         struct iwl_station_entry *station;
 463         unsigned long flags_spin;
 464         DECLARE_MAC_BUF(mac);
 465
 466         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 467         if (is_ap)
 468                 index = IWL_AP_ID;
 469         else if (is_broadcast_ether_addr(addr))
 470                 index = priv->hw_setting.bcast_sta_id;
 471         else
 472                 for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++) {
 473                         if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
 474                                                 addr)) {
 475                                 index = i;
 476                                 break;
 477                         }
 478
 479                         if (!priv->stations[i].used &&
 480                             index == IWL_INVALID_STATION)
 481                                 index = i;
 482                 }
 483
 484
 485         /* These twh conditions has the same outcome but keep them separate
 486           since they have different meaning */
 487         if (unlikely(index == IWL_INVALID_STATION)) {
 488                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 489                 return index;
 490         }
 491
 492         if (priv->stations[index].used &&
 493             !compare_ether_addr(priv->stations[index].sta.sta.addr, addr)) {
 494                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 495                 return index;
 496         }
 497
 498
 499         IWL_DEBUG_ASSOC("Add STA ID %d: %s\n", index, print_mac(mac, addr));
 500         station = &priv->stations[index];
 501         station->used = 1;
 502         priv->num_stations++;
 503
 504         memset(&station->sta, 0, sizeof(struct iwl_addsta_cmd));
 505         memcpy(station->sta.sta.addr, addr, ETH_ALEN);
 506         station->sta.mode = 0;
 507         station->sta.sta.sta_id = index;
 508         station->sta.station_flags = 0;
 509
 510 #ifdef CONFIG_IWLWIFI_HT
 511         /* BCAST station and IBSS stations do not work in HT mode */
 512         if (index != priv->hw_setting.bcast_sta_id &&
 513             priv->iw_mode != IEEE80211_IF_TYPE_IBSS)
 514                 iwl4965_set_ht_add_station(priv, index);
 515 #endif /*CONFIG_IWLWIFI_HT*/
 516
 517         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 518         iwl_send_add_station(priv, &station->sta, flags);
 519         return index;
 520
 521 }
 522
 523 /*************** DRIVER STATUS FUNCTIONS   *****/
 524
 525 static inline int iwl_is_ready(struct iwl_priv *priv)
 526 {
 527         /* The adapter is 'ready' if READY and GEO_CONFIGURED bits are
 528          * set but EXIT_PENDING is not */
 529         return test_bit(STATUS_READY, &priv->status) &&
 530                test_bit(STATUS_GEO_CONFIGURED, &priv->status) &&
 531                !test_bit(STATUS_EXIT_PENDING, &priv->status);
 532 }
 533
 534 static inline int iwl_is_alive(struct iwl_priv *priv)
 535 {
 536         return test_bit(STATUS_ALIVE, &priv->status);
 537 }
 538
 539 static inline int iwl_is_init(struct iwl_priv *priv)
 540 {
 541         return test_bit(STATUS_INIT, &priv->status);
 542 }
 543
 544 static inline int iwl_is_rfkill(struct iwl_priv *priv)
 545 {
 546         return test_bit(STATUS_RF_KILL_HW, &priv->status) ||
 547                test_bit(STATUS_RF_KILL_SW, &priv->status);
 548 }
 549
 550 static inline int iwl_is_ready_rf(struct iwl_priv *priv)
 551 {
 552
 553         if (iwl_is_rfkill(priv))
 554                 return 0;
 555
 556         return iwl_is_ready(priv);
 557 }
 558
 559 /*************** HOST COMMAND QUEUE FUNCTIONS   *****/
 560
 561 #define IWL_CMD(x) case x : return #x
 562
 563 static const char *get_cmd_string(u8 cmd)
 564 {
 565         switch (cmd) {
 566                 IWL_CMD(REPLY_ALIVE);
 567                 IWL_CMD(REPLY_ERROR);
 568                 IWL_CMD(REPLY_RXON);
 569                 IWL_CMD(REPLY_RXON_ASSOC);
 570                 IWL_CMD(REPLY_QOS_PARAM);
 571                 IWL_CMD(REPLY_RXON_TIMING);
 572                 IWL_CMD(REPLY_ADD_STA);
 573                 IWL_CMD(REPLY_REMOVE_STA);
 574                 IWL_CMD(REPLY_REMOVE_ALL_STA);
 575                 IWL_CMD(REPLY_TX);
 576                 IWL_CMD(REPLY_RATE_SCALE);
 577                 IWL_CMD(REPLY_LEDS_CMD);
 578                 IWL_CMD(REPLY_TX_LINK_QUALITY_CMD);
 579                 IWL_CMD(RADAR_NOTIFICATION);
 580                 IWL_CMD(REPLY_QUIET_CMD);
 581                 IWL_CMD(REPLY_CHANNEL_SWITCH);
 582                 IWL_CMD(CHANNEL_SWITCH_NOTIFICATION);
 583                 IWL_CMD(REPLY_SPECTRUM_MEASUREMENT_CMD);
 584                 IWL_CMD(SPECTRUM_MEASURE_NOTIFICATION);
 585                 IWL_CMD(POWER_TABLE_CMD);
 586                 IWL_CMD(PM_SLEEP_NOTIFICATION);
 587                 IWL_CMD(PM_DEBUG_STATISTIC_NOTIFIC);
 588                 IWL_CMD(REPLY_SCAN_CMD);
 589                 IWL_CMD(REPLY_SCAN_ABORT_CMD);
 590                 IWL_CMD(SCAN_START_NOTIFICATION);
 591                 IWL_CMD(SCAN_RESULTS_NOTIFICATION);
 592                 IWL_CMD(SCAN_COMPLETE_NOTIFICATION);
 593                 IWL_CMD(BEACON_NOTIFICATION);
 594                 IWL_CMD(REPLY_TX_BEACON);
 595                 IWL_CMD(WHO_IS_AWAKE_NOTIFICATION);
 596                 IWL_CMD(QUIET_NOTIFICATION);
 597                 IWL_CMD(REPLY_TX_PWR_TABLE_CMD);
 598                 IWL_CMD(MEASURE_ABORT_NOTIFICATION);
 599                 IWL_CMD(REPLY_BT_CONFIG);
 600                 IWL_CMD(REPLY_STATISTICS_CMD);
 601                 IWL_CMD(STATISTICS_NOTIFICATION);
 602                 IWL_CMD(REPLY_CARD_STATE_CMD);
 603                 IWL_CMD(CARD_STATE_NOTIFICATION);
 604                 IWL_CMD(MISSED_BEACONS_NOTIFICATION);
 605                 IWL_CMD(REPLY_CT_KILL_CONFIG_CMD);
 606                 IWL_CMD(SENSITIVITY_CMD);
 607                 IWL_CMD(REPLY_PHY_CALIBRATION_CMD);
 608                 IWL_CMD(REPLY_RX_PHY_CMD);
 609                 IWL_CMD(REPLY_RX_MPDU_CMD);
 610                 IWL_CMD(REPLY_4965_RX);
 611                 IWL_CMD(REPLY_COMPRESSED_BA);
 612         default:
 613                 return "UNKNOWN";
 614
 615         }
 616 }
 617
 618 #define HOST_COMPLETE_TIMEOUT (HZ / 2)
 619
 620 /**
 621  * iwl_enqueue_hcmd - enqueue a uCode command
 622  * @priv: device private data point
 623  * @cmd: a point to the ucode command structure
 624  *
 625  * The function returns < 0 values to indicate the operation is
 626  * failed. On success, it turns the index (> 0) of command in the
 627  * command queue.
 628  */
 629 static int iwl_enqueue_hcmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
 630 {
 631         struct iwl_tx_queue *txq = &priv->txq[IWL_CMD_QUEUE_NUM];
 632         struct iwl_queue *q = &txq->q;
 633         struct iwl_tfd_frame *tfd;
 634         u32 *control_flags;
 635         struct iwl_cmd *out_cmd;
 636         u32 idx;
 637         u16 fix_size = (u16)(cmd->len + sizeof(out_cmd->hdr));
 638         dma_addr_t phys_addr;
 639         int ret;
 640         unsigned long flags;
 641
 642         /* If any of the command structures end up being larger than
 643          * the TFD_MAX_PAYLOAD_SIZE, and it sent as a 'small' command then
 644          * we will need to increase the size of the TFD entries */
 645         BUG_ON((fix_size > TFD_MAX_PAYLOAD_SIZE) &&
 646                !(cmd->meta.flags & CMD_SIZE_HUGE));
 647
 648         if (iwl_queue_space(q) < ((cmd->meta.flags & CMD_ASYNC) ? 2 : 1)) {
 649                 IWL_ERROR("No space for Tx\n");
 650                 return -ENOSPC;
 651         }
 652
 653         spin_lock_irqsave(&priv->hcmd_lock, flags);
 654
 655         tfd = &txq->bd[q->first_empty];
 656         memset(tfd, 0, sizeof(*tfd));
 657
 658         control_flags = (u32 *) tfd;
 659
 660         idx = get_cmd_index(q, q->first_empty, cmd->meta.flags & CMD_SIZE_HUGE);
 661         out_cmd = &txq->cmd[idx];
 662
 663         out_cmd->hdr.cmd = cmd->id;
 664         memcpy(&out_cmd->meta, &cmd->meta, sizeof(cmd->meta));
 665         memcpy(&out_cmd->cmd.payload, cmd->data, cmd->len);
 666
 667         /* At this point, the out_cmd now has all of the incoming cmd
 668          * information */
 669
 670         out_cmd->hdr.flags = 0;
 671         out_cmd->hdr.sequence = cpu_to_le16(QUEUE_TO_SEQ(IWL_CMD_QUEUE_NUM) |
 672                         INDEX_TO_SEQ(q->first_empty));
 673         if (out_cmd->meta.flags & CMD_SIZE_HUGE)
 674                 out_cmd->hdr.sequence |= cpu_to_le16(SEQ_HUGE_FRAME);
 675
 676         phys_addr = txq->dma_addr_cmd + sizeof(txq->cmd[0]) * idx +
 677                         offsetof(struct iwl_cmd, hdr);
 678         iwl_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, fix_size);
 679
 680         IWL_DEBUG_HC("Sending command %s (#%x), seq: 0x%04X, "
 681                      "%d bytes at %d[%d]:%d\n",
 682                      get_cmd_string(out_cmd->hdr.cmd),
 683                      out_cmd->hdr.cmd, le16_to_cpu(out_cmd->hdr.sequence),
 684                      fix_size, q->first_empty, idx, IWL_CMD_QUEUE_NUM);
 685
 686         txq->need_update = 1;
 687         ret = iwl4965_tx_queue_update_wr_ptr(priv, txq, 0);
 688         q->first_empty = iwl_queue_inc_wrap(q->first_empty, q->n_bd);
 689         iwl_tx_queue_update_write_ptr(priv, txq);
 690
 691         spin_unlock_irqrestore(&priv->hcmd_lock, flags);
 692         return ret ? ret : idx;
 693 }
 694
 695 int iwl_send_cmd_async(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
 696 {
 697         int ret;
 698
 699         BUG_ON(!(cmd->meta.flags & CMD_ASYNC));
 700
 701         /* An asynchronous command can not expect an SKB to be set. */
 702         BUG_ON(cmd->meta.flags & CMD_WANT_SKB);
 703
 704         /* An asynchronous command MUST have a callback. */
 705         BUG_ON(!cmd->meta.u.callback);
 706
 707         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 708                 return -EBUSY;
 709
 710         ret = iwl_enqueue_hcmd(priv, cmd);
 711         if (ret < 0) {
 712                 IWL_ERROR("Error sending %s: iwl_enqueue_hcmd failed: %d\n",
 713                           get_cmd_string(cmd->id), ret);
 714                 return ret;
 715         }
 716         return 0;
 717 }
 718
 719 int iwl_send_cmd_sync(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
 720 {
 721         int cmd_idx;
 722         int ret;
 723         static atomic_t entry = ATOMIC_INIT(0); /* reentrance protection */
 724
 725         BUG_ON(cmd->meta.flags & CMD_ASYNC);
 726
 727          /* A synchronous command can not have a callback set. */
 728         BUG_ON(cmd->meta.u.callback != NULL);
 729
 730         if (atomic_xchg(&entry, 1)) {
 731                 IWL_ERROR("Error sending %s: Already sending a host command\n",
 732                           get_cmd_string(cmd->id));
 733                 return -EBUSY;
 734         }
 735
 736         set_bit(STATUS_HCMD_ACTIVE, &priv->status);
 737
 738         if (cmd->meta.flags & CMD_WANT_SKB)
 739                 cmd->meta.source = &cmd->meta;
 740
 741         cmd_idx = iwl_enqueue_hcmd(priv, cmd);
 742         if (cmd_idx < 0) {
 743                 ret = cmd_idx;
 744                 IWL_ERROR("Error sending %s: iwl_enqueue_hcmd failed: %d\n",
 745                           get_cmd_string(cmd->id), ret);
 746                 goto out;
 747         }
 748
 749         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
 750                         !test_bit(STATUS_HCMD_ACTIVE, &priv->status),
 751                         HOST_COMPLETE_TIMEOUT);
 752         if (!ret) {
 753                 if (test_bit(STATUS_HCMD_ACTIVE, &priv->status)) {
 754                         IWL_ERROR("Error sending %s: time out after %dms.\n",
 755                                   get_cmd_string(cmd->id),
 756                                   jiffies_to_msecs(HOST_COMPLETE_TIMEOUT));
 757
 758                         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
 759                         ret = -ETIMEDOUT;
 760                         goto cancel;
 761                 }
 762         }
 763
 764         if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
 765                 IWL_DEBUG_INFO("Command %s aborted: RF KILL Switch\n",
 766                                get_cmd_string(cmd->id));
 767                 ret = -ECANCELED;
 768                 goto fail;
 769         }
 770         if (test_bit(STATUS_FW_ERROR, &priv->status)) {
 771                 IWL_DEBUG_INFO("Command %s failed: FW Error\n",
 772                                get_cmd_string(cmd->id));
 773                 ret = -EIO;
 774                 goto fail;
 775         }
 776         if ((cmd->meta.flags & CMD_WANT_SKB) && !cmd->meta.u.skb) {
 777                 IWL_ERROR("Error: Response NULL in '%s'\n",
 778                           get_cmd_string(cmd->id));
 779                 ret = -EIO;
 780                 goto out;
 781         }
 782
 783         ret = 0;
 784         goto out;
 785
 786 cancel:
 787         if (cmd->meta.flags & CMD_WANT_SKB) {
 788                 struct iwl_cmd *qcmd;
 789
 790                 /* Cancel the CMD_WANT_SKB flag for the cmd in the
 791                  * TX cmd queue. Otherwise in case the cmd comes
 792                  * in later, it will possibly set an invalid
 793                  * address (cmd->meta.source). */
 794                 qcmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_idx];
 795                 qcmd->meta.flags &= ~CMD_WANT_SKB;
 796         }
 797 fail:
 798         if (cmd->meta.u.skb) {
 799                 dev_kfree_skb_any(cmd->meta.u.skb);
 800                 cmd->meta.u.skb = NULL;
 801         }
 802 out:
 803         atomic_set(&entry, 0);
 804         return ret;
 805 }
 806
 807 int iwl_send_cmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
 808 {
 809         /* A command can not be asynchronous AND expect an SKB to be set. */
 810         BUG_ON((cmd->meta.flags & CMD_ASYNC) &&
 811                (cmd->meta.flags & CMD_WANT_SKB));
 812
 813         if (cmd->meta.flags & CMD_ASYNC)
 814                 return iwl_send_cmd_async(priv, cmd);
 815
 816         return iwl_send_cmd_sync(priv, cmd);
 817 }
 818
 819 int iwl_send_cmd_pdu(struct iwl_priv *priv, u8 id, u16 len, const void *data)
 820 {
 821         struct iwl_host_cmd cmd = {
 822                 .id = id,
 823                 .len = len,
 824                 .data = data,
 825         };
 826
 827         return iwl_send_cmd_sync(priv, &cmd);
 828 }
 829
 830 static int __must_check iwl_send_cmd_u32(struct iwl_priv *priv, u8 id, u32 val)
 831 {
 832         struct iwl_host_cmd cmd = {
 833                 .id = id,
 834                 .len = sizeof(val),
 835                 .data = &val,
 836         };
 837
 838         return iwl_send_cmd_sync(priv, &cmd);
 839 }
 840
 841 int iwl_send_statistics_request(struct iwl_priv *priv)
 842 {
 843         return iwl_send_cmd_u32(priv, REPLY_STATISTICS_CMD, 0);
 844 }
 845
 846 /**
 847  * iwl_rxon_add_station - add station into station table.
 848  *
 849  * there is only one AP station with id= IWL_AP_ID
 850  * NOTE: mutex must be held before calling the this fnction
 851 */
 852 static int iwl_rxon_add_station(struct iwl_priv *priv,
 853                                 const u8 *addr, int is_ap)
 854 {
 855         u8 sta_id;
 856
 857         sta_id = iwl_add_station(priv, addr, is_ap, 0);
 858         iwl4965_add_station(priv, addr, is_ap);
 859
 860         return sta_id;
 861 }
 862
 863 /**
 864  * iwl_set_rxon_channel - Set the phymode and channel values in staging RXON
 865  * @phymode: MODE_IEEE80211A sets to 5.2GHz; all else set to 2.4GHz
 866  * @channel: Any channel valid for the requested phymode
 867
 868  * In addition to setting the staging RXON, priv->phymode is also set.
 869  *
 870  * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
 871  * in the staging RXON flag structure based on the phymode
 872  */
 873 static int iwl_set_rxon_channel(struct iwl_priv *priv, u8 phymode, u16 channel)
 874 {
 875         if (!iwl_get_channel_info(priv, phymode, channel)) {
 876                 IWL_DEBUG_INFO("Could not set channel to %d [%d]\n",
 877                                channel, phymode);
 878                 return -EINVAL;
 879         }
 880
 881         if ((le16_to_cpu(priv->staging_rxon.channel) == channel) &&
 882             (priv->phymode == phymode))
 883                 return 0;
 884
 885         priv->staging_rxon.channel = cpu_to_le16(channel);
 886         if (phymode == MODE_IEEE80211A)
 887                 priv->staging_rxon.flags &= ~RXON_FLG_BAND_24G_MSK;
 888         else
 889                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
 890
 891         priv->phymode = phymode;
 892
 893         IWL_DEBUG_INFO("Staging channel set to %d [%d]\n", channel, phymode);
 894
 895         return 0;
 896 }
 897
 898 /**
 899  * iwl_check_rxon_cmd - validate RXON structure is valid
 900  *
 901  * NOTE:  This is really only useful during development and can eventually
 902  * be #ifdef'd out once the driver is stable and folks aren't actively
 903  * making changes
 904  */
 905 static int iwl_check_rxon_cmd(struct iwl_rxon_cmd *rxon)
 906 {
 907         int error = 0;
 908         int counter = 1;
 909
 910         if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
 911                 error |= le32_to_cpu(rxon->flags &
 912                                 (RXON_FLG_TGJ_NARROW_BAND_MSK |
 913                                  RXON_FLG_RADAR_DETECT_MSK));
 914                 if (error)
 915                         IWL_WARNING("check 24G fields %d | %d\n",
 916                                     counter++, error);
 917         } else {
 918                 error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ?
 919                                 0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK);
 920                 if (error)
 921                         IWL_WARNING("check 52 fields %d | %d\n",
 922                                     counter++, error);
 923                 error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK);
 924                 if (error)
 925                         IWL_WARNING("check 52 CCK %d | %d\n",
 926                                     counter++, error);
 927         }
 928         error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1;
 929         if (error)
 930                 IWL_WARNING("check mac addr %d | %d\n", counter++, error);
 931
 932         /* make sure basic rates 6Mbps and 1Mbps are supported */
 933         error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) &&
 934                   ((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0));
 935         if (error)
 936                 IWL_WARNING("check basic rate %d | %d\n", counter++, error);
 937
 938         error |= (le16_to_cpu(rxon->assoc_id) > 2007);
 939         if (error)
 940                 IWL_WARNING("check assoc id %d | %d\n", counter++, error);
 941
 942         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
 943                         == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK));
 944         if (error)
 945                 IWL_WARNING("check CCK and short slot %d | %d\n",
 946                             counter++, error);
 947
 948         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
 949                         == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK));
 950         if (error)
 951                 IWL_WARNING("check CCK & auto detect %d | %d\n",
 952                             counter++, error);
 953
 954         error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
 955                         RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK);
 956         if (error)
 957                 IWL_WARNING("check TGG and auto detect %d | %d\n",
 958                             counter++, error);
 959
 960         if (error)
 961                 IWL_WARNING("Tuning to channel %d\n",
 962                             le16_to_cpu(rxon->channel));
 963
 964         if (error) {
 965                 IWL_ERROR("Not a valid iwl_rxon_assoc_cmd field values\n");
 966                 return -1;
 967         }
 968         return 0;
 969 }
 970
 971 /**
 972  * iwl_full_rxon_required - determine if RXON_ASSOC can be used in RXON commit
 973  * @priv: staging_rxon is comapred to active_rxon
 974  *
 975  * If the RXON structure is changing sufficient to require a new
 976  * tune or to clear and reset the RXON_FILTER_ASSOC_MSK then return 1
 977  * to indicate a new tune is required.
 978  */
 979 static int iwl_full_rxon_required(struct iwl_priv *priv)
 980 {
 981
 982         /* These items are only settable from the full RXON command */
 983         if (!(priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) ||
 984             compare_ether_addr(priv->staging_rxon.bssid_addr,
 985                                priv->active_rxon.bssid_addr) ||
 986             compare_ether_addr(priv->staging_rxon.node_addr,
 987                                priv->active_rxon.node_addr) ||
 988             compare_ether_addr(priv->staging_rxon.wlap_bssid_addr,
 989                                priv->active_rxon.wlap_bssid_addr) ||
 990             (priv->staging_rxon.dev_type != priv->active_rxon.dev_type) ||
 991             (priv->staging_rxon.channel != priv->active_rxon.channel) ||
 992             (priv->staging_rxon.air_propagation !=
 993              priv->active_rxon.air_propagation) ||
 994             (priv->staging_rxon.ofdm_ht_single_stream_basic_rates !=
 995              priv->active_rxon.ofdm_ht_single_stream_basic_rates) ||
 996             (priv->staging_rxon.ofdm_ht_dual_stream_basic_rates !=
 997              priv->active_rxon.ofdm_ht_dual_stream_basic_rates) ||
 998             (priv->staging_rxon.rx_chain != priv->active_rxon.rx_chain) ||
 999             (priv->staging_rxon.assoc_id != priv->active_rxon.assoc_id))
1000                 return 1;
1001
1002         /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
1003          * be updated with the RXON_ASSOC command -- however only some
1004          * flag transitions are allowed using RXON_ASSOC */
1005
1006         /* Check if we are not switching bands */
1007         if ((priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) !=
1008             (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK))
1009                 return 1;
1010
1011         /* Check if we are switching association toggle */
1012         if ((priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) !=
1013                 (priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK))
1014                 return 1;
1015
1016         return 0;
1017 }
1018
1019 static int iwl_send_rxon_assoc(struct iwl_priv *priv)
1020 {
1021         int rc = 0;
1022         struct iwl_rx_packet *res = NULL;
1023         struct iwl_rxon_assoc_cmd rxon_assoc;
1024         struct iwl_host_cmd cmd = {
1025                 .id = REPLY_RXON_ASSOC,
1026                 .len = sizeof(rxon_assoc),
1027                 .meta.flags = CMD_WANT_SKB,
1028                 .data = &rxon_assoc,
1029         };
1030         const struct iwl_rxon_cmd *rxon1 = &priv->staging_rxon;
1031         const struct iwl_rxon_cmd *rxon2 = &priv->active_rxon;
1032
1033         if ((rxon1->flags == rxon2->flags) &&
1034             (rxon1->filter_flags == rxon2->filter_flags) &&
1035             (rxon1->cck_basic_rates == rxon2->cck_basic_rates) &&
1036             (rxon1->ofdm_ht_single_stream_basic_rates ==
1037              rxon2->ofdm_ht_single_stream_basic_rates) &&
1038             (rxon1->ofdm_ht_dual_stream_basic_rates ==
1039              rxon2->ofdm_ht_dual_stream_basic_rates) &&
1040             (rxon1->rx_chain == rxon2->rx_chain) &&
1041             (rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates)) {
1042                 IWL_DEBUG_INFO("Using current RXON_ASSOC.  Not resending.\n");
1043                 return 0;
1044         }
1045
1046         rxon_assoc.flags = priv->staging_rxon.flags;
1047         rxon_assoc.filter_flags = priv->staging_rxon.filter_flags;
1048         rxon_assoc.ofdm_basic_rates = priv->staging_rxon.ofdm_basic_rates;
1049         rxon_assoc.cck_basic_rates = priv->staging_rxon.cck_basic_rates;
1050         rxon_assoc.reserved = 0;
1051         rxon_assoc.ofdm_ht_single_stream_basic_rates =
1052             priv->staging_rxon.ofdm_ht_single_stream_basic_rates;
1053         rxon_assoc.ofdm_ht_dual_stream_basic_rates =
1054             priv->staging_rxon.ofdm_ht_dual_stream_basic_rates;
1055         rxon_assoc.rx_chain_select_flags = priv->staging_rxon.rx_chain;
1056
1057         rc = iwl_send_cmd_sync(priv, &cmd);
1058         if (rc)
1059                 return rc;
1060
1061         res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
1062         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1063                 IWL_ERROR("Bad return from REPLY_RXON_ASSOC command\n");
1064                 rc = -EIO;
1065         }
1066
1067         priv->alloc_rxb_skb--;
1068         dev_kfree_skb_any(cmd.meta.u.skb);
1069
1070         return rc;
1071 }
1072
1073 /**
1074  * iwl_commit_rxon - commit staging_rxon to hardware
1075  *
1076  * The RXON command in staging_rxon is commited to the hardware and
1077  * the active_rxon structure is updated with the new data.  This
1078  * function correctly transitions out of the RXON_ASSOC_MSK state if
1079  * a HW tune is required based on the RXON structure changes.
1080  */
1081 static int iwl_commit_rxon(struct iwl_priv *priv)
1082 {
1083         /* cast away the const for active_rxon in this function */
1084         struct iwl_rxon_cmd *active_rxon = (void *)&priv->active_rxon;
1085         DECLARE_MAC_BUF(mac);
1086         int rc = 0;
1087
1088         if (!iwl_is_alive(priv))
1089                 return -1;
1090
1091         /* always get timestamp with Rx frame */
1092         priv->staging_rxon.flags |= RXON_FLG_TSF2HOST_MSK;
1093
1094         rc = iwl_check_rxon_cmd(&priv->staging_rxon);
1095         if (rc) {
1096                 IWL_ERROR("Invalid RXON configuration.  Not committing.\n");
1097                 return -EINVAL;
1098         }
1099
1100         /* If we don't need to send a full RXON, we can use
1101          * iwl_rxon_assoc_cmd which is used to reconfigure filter
1102          * and other flags for the current radio configuration. */
1103         if (!iwl_full_rxon_required(priv)) {
1104                 rc = iwl_send_rxon_assoc(priv);
1105                 if (rc) {
1106                         IWL_ERROR("Error setting RXON_ASSOC "
1107                                   "configuration (%d).\n", rc);
1108                         return rc;
1109                 }
1110
1111                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
1112
1113                 return 0;
1114         }
1115
1116         /* station table will be cleared */
1117         priv->assoc_station_added = 0;
1118
1119 #ifdef CONFIG_IWLWIFI_SENSITIVITY
1120         priv->sensitivity_data.state = IWL_SENS_CALIB_NEED_REINIT;
1121         if (!priv->error_recovering)
1122                 priv->start_calib = 0;
1123
1124         iwl4965_init_sensitivity(priv, CMD_ASYNC, 1);
1125 #endif /* CONFIG_IWLWIFI_SENSITIVITY */
1126
1127         /* If we are currently associated and the new config requires
1128          * an RXON_ASSOC and the new config wants the associated mask enabled,
1129          * we must clear the associated from the active configuration
1130          * before we apply the new config */
1131         if (iwl_is_associated(priv) &&
1132             (priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK)) {
1133                 IWL_DEBUG_INFO("Toggling associated bit on current RXON\n");
1134                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1135
1136                 rc = iwl_send_cmd_pdu(priv, REPLY_RXON,
1137                                       sizeof(struct iwl_rxon_cmd),
1138                                       &priv->active_rxon);
1139
1140                 /* If the mask clearing failed then we set
1141                  * active_rxon back to what it was previously */
1142                 if (rc) {
1143                         active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
1144                         IWL_ERROR("Error clearing ASSOC_MSK on current "
1145                                   "configuration (%d).\n", rc);
1146                         return rc;
1147                 }
1148         }
1149
1150         IWL_DEBUG_INFO("Sending RXON\n"
1151                        "* with%s RXON_FILTER_ASSOC_MSK\n"
1152                        "* channel = %d\n"
1153                        "* bssid = %s\n",
1154                        ((priv->staging_rxon.filter_flags &
1155                          RXON_FILTER_ASSOC_MSK) ? "" : "out"),
1156                        le16_to_cpu(priv->staging_rxon.channel),
1157                        print_mac(mac, priv->staging_rxon.bssid_addr));
1158
1159         /* Apply the new configuration */
1160         rc = iwl_send_cmd_pdu(priv, REPLY_RXON,
1161                               sizeof(struct iwl_rxon_cmd), &priv->staging_rxon);
1162         if (rc) {
1163                 IWL_ERROR("Error setting new configuration (%d).\n", rc);
1164                 return rc;
1165         }
1166
1167         iwl_clear_stations_table(priv);
1168
1169 #ifdef CONFIG_IWLWIFI_SENSITIVITY
1170         if (!priv->error_recovering)
1171                 priv->start_calib = 0;
1172
1173         priv->sensitivity_data.state = IWL_SENS_CALIB_NEED_REINIT;
1174         iwl4965_init_sensitivity(priv, CMD_ASYNC, 1);
1175 #endif /* CONFIG_IWLWIFI_SENSITIVITY */
1176
1177         memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
1178
1179         /* If we issue a new RXON command which required a tune then we must
1180          * send a new TXPOWER command or we won't be able to Tx any frames */
1181         rc = iwl_hw_reg_send_txpower(priv);
1182         if (rc) {
1183                 IWL_ERROR("Error setting Tx power (%d).\n", rc);
1184                 return rc;
1185         }
1186
1187         /* Add the broadcast address so we can send broadcast frames */
1188         if (iwl_rxon_add_station(priv, BROADCAST_ADDR, 0) ==
1189             IWL_INVALID_STATION) {
1190                 IWL_ERROR("Error adding BROADCAST address for transmit.\n");
1191                 return -EIO;
1192         }
1193
1194         /* If we have set the ASSOC_MSK and we are in BSS mode then
1195          * add the IWL_AP_ID to the station rate table */
1196         if (iwl_is_associated(priv) &&
1197             (priv->iw_mode == IEEE80211_IF_TYPE_STA)) {
1198                 if (iwl_rxon_add_station(priv, priv->active_rxon.bssid_addr, 1)
1199                     == IWL_INVALID_STATION) {
1200                         IWL_ERROR("Error adding AP address for transmit.\n");
1201                         return -EIO;
1202                 }
1203                 priv->assoc_station_added = 1;
1204         }
1205
1206         return 0;
1207 }
1208
1209 static int iwl_send_bt_config(struct iwl_priv *priv)
1210 {
1211         struct iwl_bt_cmd bt_cmd = {
1212                 .flags = 3,
1213                 .lead_time = 0xAA,
1214                 .max_kill = 1,
1215                 .kill_ack_mask = 0,
1216                 .kill_cts_mask = 0,
1217         };
1218
1219         return iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG,
1220                                 sizeof(struct iwl_bt_cmd), &bt_cmd);
1221 }
1222
1223 static int iwl_send_scan_abort(struct iwl_priv *priv)
1224 {
1225         int rc = 0;
1226         struct iwl_rx_packet *res;
1227         struct iwl_host_cmd cmd = {
1228                 .id = REPLY_SCAN_ABORT_CMD,
1229                 .meta.flags = CMD_WANT_SKB,
1230         };
1231
1232         /* If there isn't a scan actively going on in the hardware
1233          * then we are in between scan bands and not actually
1234          * actively scanning, so don't send the abort command */
1235         if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
1236                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1237                 return 0;
1238         }
1239
1240         rc = iwl_send_cmd_sync(priv, &cmd);
1241         if (rc) {
1242                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1243                 return rc;
1244         }
1245
1246         res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
1247         if (res->u.status != CAN_ABORT_STATUS) {
1248                 /* The scan abort will return 1 for success or
1249                  * 2 for "failure".  A failure condition can be
1250                  * due to simply not being in an active scan which
1251                  * can occur if we send the scan abort before we
1252                  * the microcode has notified us that a scan is
1253                  * completed. */
1254                 IWL_DEBUG_INFO("SCAN_ABORT returned %d.\n", res->u.status);
1255                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
1256                 clear_bit(STATUS_SCAN_HW, &priv->status);
1257         }
1258
1259         dev_kfree_skb_any(cmd.meta.u.skb);
1260
1261         return rc;
1262 }
1263
1264 static int iwl_card_state_sync_callback(struct iwl_priv *priv,
1265                                         struct iwl_cmd *cmd,
1266                                         struct sk_buff *skb)
1267 {
1268         return 1;
1269 }
1270
1271 /*
1272  * CARD_STATE_CMD
1273  *
1274  * Use: Sets the internal card state to enable, disable, or halt
1275  *
1276  * When in the 'enable' state the card operates as normal.
1277  * When in the 'disable' state, the card enters into a low power mode.
1278  * When in the 'halt' state, the card is shut down and must be fully
1279  * restarted to come back on.
1280  */
1281 static int iwl_send_card_state(struct iwl_priv *priv, u32 flags, u8 meta_flag)
1282 {
1283         struct iwl_host_cmd cmd = {
1284                 .id = REPLY_CARD_STATE_CMD,
1285                 .len = sizeof(u32),
1286                 .data = &flags,
1287                 .meta.flags = meta_flag,
1288         };
1289
1290         if (meta_flag & CMD_ASYNC)
1291                 cmd.meta.u.callback = iwl_card_state_sync_callback;
1292
1293         return iwl_send_cmd(priv, &cmd);
1294 }
1295
1296 static int iwl_add_sta_sync_callback(struct iwl_priv *priv,
1297                                      struct iwl_cmd *cmd, struct sk_buff *skb)
1298 {
1299         struct iwl_rx_packet *res = NULL;
1300
1301         if (!skb) {
1302                 IWL_ERROR("Error: Response NULL in REPLY_ADD_STA.\n");
1303                 return 1;
1304         }
1305
1306         res = (struct iwl_rx_packet *)skb->data;
1307         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1308                 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
1309                           res->hdr.flags);
1310                 return 1;
1311         }
1312
1313         switch (res->u.add_sta.status) {
1314         case ADD_STA_SUCCESS_MSK:
1315                 break;
1316         default:
1317                 break;
1318         }
1319
1320         /* We didn't cache the SKB; let the caller free it */
1321         return 1;
1322 }
1323
1324 int iwl_send_add_station(struct iwl_priv *priv,
1325                          struct iwl_addsta_cmd *sta, u8 flags)
1326 {
1327         struct iwl_rx_packet *res = NULL;
1328         int rc = 0;
1329         struct iwl_host_cmd cmd = {
1330                 .id = REPLY_ADD_STA,
1331                 .len = sizeof(struct iwl_addsta_cmd),
1332                 .meta.flags = flags,
1333                 .data = sta,
1334         };
1335
1336         if (flags & CMD_ASYNC)
1337                 cmd.meta.u.callback = iwl_add_sta_sync_callback;
1338         else
1339                 cmd.meta.flags |= CMD_WANT_SKB;
1340
1341         rc = iwl_send_cmd(priv, &cmd);
1342
1343         if (rc || (flags & CMD_ASYNC))
1344                 return rc;
1345
1346         res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
1347         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1348                 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
1349                           res->hdr.flags);
1350                 rc = -EIO;
1351         }
1352
1353         if (rc == 0) {
1354                 switch (res->u.add_sta.status) {
1355                 case ADD_STA_SUCCESS_MSK:
1356                         IWL_DEBUG_INFO("REPLY_ADD_STA PASSED\n");
1357                         break;
1358                 default:
1359                         rc = -EIO;
1360                         IWL_WARNING("REPLY_ADD_STA failed\n");
1361                         break;
1362                 }
1363         }
1364
1365         priv->alloc_rxb_skb--;
1366         dev_kfree_skb_any(cmd.meta.u.skb);
1367
1368         return rc;
1369 }
1370
1371 static int iwl_update_sta_key_info(struct iwl_priv *priv,
1372                                    struct ieee80211_key_conf *keyconf,
1373                                    u8 sta_id)
1374 {
1375         unsigned long flags;
1376         __le16 key_flags = 0;
1377
1378         switch (keyconf->alg) {
1379         case ALG_CCMP:
1380                 key_flags |= STA_KEY_FLG_CCMP;
1381                 key_flags |= cpu_to_le16(
1382                                 keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
1383                 key_flags &= ~STA_KEY_FLG_INVALID;
1384                 break;
1385         case ALG_TKIP:
1386         case ALG_WEP:
1387                 return -EINVAL;
1388         default:
1389                 return -EINVAL;
1390         }
1391         spin_lock_irqsave(&priv->sta_lock, flags);
1392         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
1393         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
1394         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
1395                keyconf->keylen);
1396
1397         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
1398                keyconf->keylen);
1399         priv->stations[sta_id].sta.key.key_flags = key_flags;
1400         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1401         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1402
1403         spin_unlock_irqrestore(&priv->sta_lock, flags);
1404
1405         IWL_DEBUG_INFO("hwcrypto: modify ucode station key info\n");
1406         iwl_send_add_station(priv, &priv->stations[sta_id].sta, 0);
1407         return 0;
1408 }
1409
1410 static int iwl_clear_sta_key_info(struct iwl_priv *priv, u8 sta_id)
1411 {
1412         unsigned long flags;
1413
1414         spin_lock_irqsave(&priv->sta_lock, flags);
1415         memset(&priv->stations[sta_id].keyinfo, 0, sizeof(struct iwl_hw_key));
1416         memset(&priv->stations[sta_id].sta.key, 0, sizeof(struct iwl_keyinfo));
1417         priv->stations[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
1418         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1419         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1420         spin_unlock_irqrestore(&priv->sta_lock, flags);
1421
1422         IWL_DEBUG_INFO("hwcrypto: clear ucode station key info\n");
1423         iwl_send_add_station(priv, &priv->stations[sta_id].sta, 0);
1424         return 0;
1425 }
1426
1427 static void iwl_clear_free_frames(struct iwl_priv *priv)
1428 {
1429         struct list_head *element;
1430
1431         IWL_DEBUG_INFO("%d frames on pre-allocated heap on clear.\n",
1432                        priv->frames_count);
1433
1434         while (!list_empty(&priv->free_frames)) {
1435                 element = priv->free_frames.next;
1436                 list_del(element);
1437                 kfree(list_entry(element, struct iwl_frame, list));
1438                 priv->frames_count--;
1439         }
1440
1441         if (priv->frames_count) {
1442                 IWL_WARNING("%d frames still in use.  Did we lose one?\n",
1443                             priv->frames_count);
1444                 priv->frames_count = 0;
1445         }
1446 }
1447
1448 static struct iwl_frame *iwl_get_free_frame(struct iwl_priv *priv)
1449 {
1450         struct iwl_frame *frame;
1451         struct list_head *element;
1452         if (list_empty(&priv->free_frames)) {
1453                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
1454                 if (!frame) {
1455                         IWL_ERROR("Could not allocate frame!\n");
1456                         return NULL;
1457                 }
1458
1459                 priv->frames_count++;
1460                 return frame;
1461         }
1462
1463         element = priv->free_frames.next;
1464         list_del(element);
1465         return list_entry(element, struct iwl_frame, list);
1466 }
1467
1468 static void iwl_free_frame(struct iwl_priv *priv, struct iwl_frame *frame)
1469 {
1470         memset(frame, 0, sizeof(*frame));
1471         list_add(&frame->list, &priv->free_frames);
1472 }
1473
1474 unsigned int iwl_fill_beacon_frame(struct iwl_priv *priv,
1475                                 struct ieee80211_hdr *hdr,
1476                                 const u8 *dest, int left)
1477 {
1478
1479         if (!iwl_is_associated(priv) || !priv->ibss_beacon ||
1480             ((priv->iw_mode != IEEE80211_IF_TYPE_IBSS) &&
1481              (priv->iw_mode != IEEE80211_IF_TYPE_AP)))
1482                 return 0;
1483
1484         if (priv->ibss_beacon->len > left)
1485                 return 0;
1486
1487         memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
1488
1489         return priv->ibss_beacon->len;
1490 }
1491
1492 int iwl_rate_index_from_plcp(int plcp)
1493 {
1494         int i = 0;
1495
1496         if (plcp & RATE_MCS_HT_MSK) {
1497                 i = (plcp & 0xff);
1498
1499                 if (i >= IWL_RATE_MIMO_6M_PLCP)
1500                         i = i - IWL_RATE_MIMO_6M_PLCP;
1501
1502                 i += IWL_FIRST_OFDM_RATE;
1503                 /* skip 9M not supported in ht*/
1504                 if (i >= IWL_RATE_9M_INDEX)
1505                         i += 1;
1506                 if ((i >= IWL_FIRST_OFDM_RATE) &&
1507                     (i <= IWL_LAST_OFDM_RATE))
1508                         return i;
1509         } else {
1510                 for (i = 0; i < ARRAY_SIZE(iwl_rates); i++)
1511                         if (iwl_rates[i].plcp == (plcp &0xFF))
1512                                 return i;
1513         }
1514         return -1;
1515 }
1516
1517 static u8 iwl_rate_get_lowest_plcp(int rate_mask)
1518 {
1519         u8 i;
1520
1521         for (i = IWL_RATE_1M_INDEX; i != IWL_RATE_INVALID;
1522              i = iwl_rates[i].next_ieee) {
1523                 if (rate_mask & (1 << i))
1524                         return iwl_rates[i].plcp;
1525         }
1526
1527         return IWL_RATE_INVALID;
1528 }
1529
1530 static int iwl_send_beacon_cmd(struct iwl_priv *priv)
1531 {
1532         struct iwl_frame *frame;
1533         unsigned int frame_size;
1534         int rc;
1535         u8 rate;
1536
1537         frame = iwl_get_free_frame(priv);
1538
1539         if (!frame) {
1540                 IWL_ERROR("Could not obtain free frame buffer for beacon "
1541                           "command.\n");
1542                 return -ENOMEM;
1543         }
1544
1545         if (!(priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)) {
1546                 rate = iwl_rate_get_lowest_plcp(priv->active_rate_basic &
1547                                                 0xFF0);
1548                 if (rate == IWL_INVALID_RATE)
1549                         rate = IWL_RATE_6M_PLCP;
1550         } else {
1551                 rate = iwl_rate_get_lowest_plcp(priv->active_rate_basic & 0xF);
1552                 if (rate == IWL_INVALID_RATE)
1553                         rate = IWL_RATE_1M_PLCP;
1554         }
1555
1556         frame_size = iwl_hw_get_beacon_cmd(priv, frame, rate);
1557
1558         rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
1559                               &frame->u.cmd[0]);
1560
1561         iwl_free_frame(priv, frame);
1562
1563         return rc;
1564 }
1565
1566 /******************************************************************************
1567  *
1568  * EEPROM related functions
1569  *
1570  ******************************************************************************/
1571
1572 static void get_eeprom_mac(struct iwl_priv *priv, u8 *mac)
1573 {
1574         memcpy(mac, priv->eeprom.mac_address, 6);
1575 }
1576
1577 /**
1578  * iwl_eeprom_init - read EEPROM contents
1579  *
1580  * Load the EEPROM from adapter into priv->eeprom
1581  *
1582  * NOTE:  This routine uses the non-debug IO access functions.
1583  */
1584 int iwl_eeprom_init(struct iwl_priv *priv)
1585 {
1586         u16 *e = (u16 *)&priv->eeprom;
1587         u32 gp = iwl_read32(priv, CSR_EEPROM_GP);
1588         u32 r;
1589         int sz = sizeof(priv->eeprom);
1590         int rc;
1591         int i;
1592         u16 addr;
1593
1594         /* The EEPROM structure has several padding buffers within it
1595          * and when adding new EEPROM maps is subject to programmer errors
1596          * which may be very difficult to identify without explicitly
1597          * checking the resulting size of the eeprom map. */
1598         BUILD_BUG_ON(sizeof(priv->eeprom) != IWL_EEPROM_IMAGE_SIZE);
1599
1600         if ((gp & CSR_EEPROM_GP_VALID_MSK) == CSR_EEPROM_GP_BAD_SIGNATURE) {
1601                 IWL_ERROR("EEPROM not found, EEPROM_GP=0x%08x", gp);
1602                 return -ENOENT;
1603         }
1604
1605         rc = iwl_eeprom_aqcuire_semaphore(priv);
1606         if (rc < 0) {
1607                 IWL_ERROR("Failed to aqcuire EEPROM semaphore.\n");
1608                 return -ENOENT;
1609         }
1610
1611         /* eeprom is an array of 16bit values */
1612         for (addr = 0; addr < sz; addr += sizeof(u16)) {
1613                 _iwl_write32(priv, CSR_EEPROM_REG, addr << 1);
1614                 _iwl_clear_bit(priv, CSR_EEPROM_REG, CSR_EEPROM_REG_BIT_CMD);
1615
1616                 for (i = 0; i < IWL_EEPROM_ACCESS_TIMEOUT;
1617                                         i += IWL_EEPROM_ACCESS_DELAY) {
1618                         r = _iwl_read_restricted(priv, CSR_EEPROM_REG);
1619                         if (r & CSR_EEPROM_REG_READ_VALID_MSK)
1620                                 break;
1621                         udelay(IWL_EEPROM_ACCESS_DELAY);
1622                 }
1623
1624                 if (!(r & CSR_EEPROM_REG_READ_VALID_MSK)) {
1625                         IWL_ERROR("Time out reading EEPROM[%d]", addr);
1626                         rc = -ETIMEDOUT;
1627                         goto done;
1628                 }
1629                 e[addr / 2] = le16_to_cpu(r >> 16);
1630         }
1631         rc = 0;
1632
1633 done:
1634         iwl_eeprom_release_semaphore(priv);
1635         return rc;
1636 }
1637
1638 /******************************************************************************
1639  *
1640  * Misc. internal state and helper functions
1641  *
1642  ******************************************************************************/
1643 #ifdef CONFIG_IWLWIFI_DEBUG
1644
1645 /**
1646  * iwl_report_frame - dump frame to syslog during debug sessions
1647  *
1648  * hack this function to show different aspects of received frames,
1649  * including selective frame dumps.
1650  * group100 parameter selects whether to show 1 out of 100 good frames.
1651  *
1652  * TODO:  ieee80211_hdr stuff is common to 3945 and 4965, so frame type
1653  *        info output is okay, but some of this stuff (e.g. iwl_rx_frame_stats)
1654  *        is 3945-specific and gives bad output for 4965.  Need to split the
1655  *        functionality, keep common stuff here.
1656  */
1657 void iwl_report_frame(struct iwl_priv *priv,
1658                       struct iwl_rx_packet *pkt,
1659                       struct ieee80211_hdr *header, int group100)
1660 {
1661         u32 to_us;
1662         u32 print_summary = 0;
1663         u32 print_dump = 0;     /* set to 1 to dump all frames' contents */
1664         u32 hundred = 0;
1665         u32 dataframe = 0;
1666         u16 fc;
1667         u16 seq_ctl;
1668         u16 channel;
1669         u16 phy_flags;
1670         int rate_sym;
1671         u16 length;
1672         u16 status;
1673         u16 bcn_tmr;
1674         u32 tsf_low;
1675         u64 tsf;
1676         u8 rssi;
1677         u8 agc;
1678         u16 sig_avg;
1679         u16 noise_diff;
1680         struct iwl_rx_frame_stats *rx_stats = IWL_RX_STATS(pkt);
1681         struct iwl_rx_frame_hdr *rx_hdr = IWL_RX_HDR(pkt);
1682         struct iwl_rx_frame_end *rx_end = IWL_RX_END(pkt);
1683         u8 *data = IWL_RX_DATA(pkt);
1684
1685         /* MAC header */
1686         fc = le16_to_cpu(header->frame_control);
1687         seq_ctl = le16_to_cpu(header->seq_ctrl);
1688
1689         /* metadata */
1690         channel = le16_to_cpu(rx_hdr->channel);
1691         phy_flags = le16_to_cpu(rx_hdr->phy_flags);
1692         rate_sym = rx_hdr->rate;
1693         length = le16_to_cpu(rx_hdr->len);
1694
1695         /* end-of-frame status and timestamp */
1696         status = le32_to_cpu(rx_end->status);
1697         bcn_tmr = le32_to_cpu(rx_end->beacon_timestamp);
1698         tsf_low = le64_to_cpu(rx_end->timestamp) & 0x0ffffffff;
1699         tsf = le64_to_cpu(rx_end->timestamp);
1700
1701         /* signal statistics */
1702         rssi = rx_stats->rssi;
1703         agc = rx_stats->agc;
1704         sig_avg = le16_to_cpu(rx_stats->sig_avg);
1705         noise_diff = le16_to_cpu(rx_stats->noise_diff);
1706
1707         to_us = !compare_ether_addr(header->addr1, priv->mac_addr);
1708
1709         /* if data frame is to us and all is good,
1710          *   (optionally) print summary for only 1 out of every 100 */
1711         if (to_us && (fc & ~IEEE80211_FCTL_PROTECTED) ==
1712             (IEEE80211_FCTL_FROMDS | IEEE80211_FTYPE_DATA)) {
1713                 dataframe = 1;
1714                 if (!group100)
1715                         print_summary = 1;      /* print each frame */
1716                 else if (priv->framecnt_to_us < 100) {
1717                         priv->framecnt_to_us++;
1718                         print_summary = 0;
1719                 } else {
1720                         priv->framecnt_to_us = 0;
1721                         print_summary = 1;
1722                         hundred = 1;
1723                 }
1724         } else {
1725                 /* print summary for all other frames */
1726                 print_summary = 1;
1727         }
1728
1729         if (print_summary) {
1730                 char *title;
1731                 u32 rate;
1732
1733                 if (hundred)
1734                         title = "100Frames";
1735                 else if (fc & IEEE80211_FCTL_RETRY)
1736                         title = "Retry";
1737                 else if (ieee80211_is_assoc_response(fc))
1738                         title = "AscRsp";
1739                 else if (ieee80211_is_reassoc_response(fc))
1740                         title = "RasRsp";
1741                 else if (ieee80211_is_probe_response(fc)) {
1742                         title = "PrbRsp";
1743                         print_dump = 1; /* dump frame contents */
1744                 } else if (ieee80211_is_beacon(fc)) {
1745                         title = "Beacon";
1746                         print_dump = 1; /* dump frame contents */
1747                 } else if (ieee80211_is_atim(fc))
1748                         title = "ATIM";
1749                 else if (ieee80211_is_auth(fc))
1750                         title = "Auth";
1751                 else if (ieee80211_is_deauth(fc))
1752                         title = "DeAuth";
1753                 else if (ieee80211_is_disassoc(fc))
1754                         title = "DisAssoc";
1755                 else
1756                         title = "Frame";
1757
1758                 rate = iwl_rate_index_from_plcp(rate_sym);
1759                 if (rate == -1)
1760                         rate = 0;
1761                 else
1762                         rate = iwl_rates[rate].ieee / 2;
1763
1764                 /* print frame summary.
1765                  * MAC addresses show just the last byte (for brevity),
1766                  *    but you can hack it to show more, if you'd like to. */
1767                 if (dataframe)
1768                         IWL_DEBUG_RX("%s: mhd=0x%04x, dst=0x%02x, "
1769                                      "len=%u, rssi=%d, chnl=%d, rate=%u, \n",
1770                                      title, fc, header->addr1[5],
1771                                      length, rssi, channel, rate);
1772                 else {
1773                         /* src/dst addresses assume managed mode */
1774                         IWL_DEBUG_RX("%s: 0x%04x, dst=0x%02x, "
1775                                      "src=0x%02x, rssi=%u, tim=%lu usec, "
1776                                      "phy=0x%02x, chnl=%d\n",
1777                                      title, fc, header->addr1[5],
1778                                      header->addr3[5], rssi,
1779                                      tsf_low - priv->scan_start_tsf,
1780                                      phy_flags, channel);
1781                 }
1782         }
1783         if (print_dump)
1784                 iwl_print_hex_dump(IWL_DL_RX, data, length);
1785 }
1786 #endif
1787
1788 static void iwl_unset_hw_setting(struct iwl_priv *priv)
1789 {
1790         if (priv->hw_setting.shared_virt)
1791                 pci_free_consistent(priv->pci_dev,
1792                                     sizeof(struct iwl_shared),
1793                                     priv->hw_setting.shared_virt,
1794                                     priv->hw_setting.shared_phys);
1795 }
1796
1797 /**
1798  * iwl_supported_rate_to_ie - fill in the supported rate in IE field
1799  *
1800  * return : set the bit for each supported rate insert in ie
1801  */
1802 static u16 iwl_supported_rate_to_ie(u8 *ie, u16 supported_rate,
1803                                     u16 basic_rate, int *left)
1804 {
1805         u16 ret_rates = 0, bit;
1806         int i;
1807         u8 *cnt = ie;
1808         u8 *rates = ie + 1;
1809
1810         for (bit = 1, i = 0; i < IWL_RATE_COUNT; i++, bit <<= 1) {
1811                 if (bit & supported_rate) {
1812                         ret_rates |= bit;
1813                         rates[*cnt] = iwl_rates[i].ieee |
1814                                 ((bit & basic_rate) ? 0x80 : 0x00);
1815                         (*cnt)++;
1816                         (*left)--;
1817                         if ((*left <= 0) ||
1818                             (*cnt >= IWL_SUPPORTED_RATES_IE_LEN))
1819                                 break;
1820                 }
1821         }
1822
1823         return ret_rates;
1824 }
1825
1826 #ifdef CONFIG_IWLWIFI_HT
1827 void static iwl_set_ht_capab(struct ieee80211_hw *hw,
1828                              struct ieee80211_ht_capability *ht_cap,
1829                              u8 use_wide_chan);
1830 #endif
1831
1832 /**
1833  * iwl_fill_probe_req - fill in all required fields and IE for probe request
1834  */
1835 static u16 iwl_fill_probe_req(struct iwl_priv *priv,
1836                               struct ieee80211_mgmt *frame,
1837                               int left, int is_direct)
1838 {
1839         int len = 0;
1840         u8 *pos = NULL;
1841         u16 active_rates, ret_rates, cck_rates;
1842
1843         /* Make sure there is enough space for the probe request,
1844          * two mandatory IEs and the data */
1845         left -= 24;
1846         if (left < 0)
1847                 return 0;
1848         len += 24;
1849
1850         frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
1851         memcpy(frame->da, BROADCAST_ADDR, ETH_ALEN);
1852         memcpy(frame->sa, priv->mac_addr, ETH_ALEN);
1853         memcpy(frame->bssid, BROADCAST_ADDR, ETH_ALEN);
1854         frame->seq_ctrl = 0;
1855
1856         /* fill in our indirect SSID IE */
1857         /* ...next IE... */
1858
1859         left -= 2;
1860         if (left < 0)
1861                 return 0;
1862         len += 2;
1863         pos = &(frame->u.probe_req.variable[0]);
1864         *pos++ = WLAN_EID_SSID;
1865         *pos++ = 0;
1866
1867         /* fill in our direct SSID IE... */
1868         if (is_direct) {
1869                 /* ...next IE... */
1870                 left -= 2 + priv->essid_len;
1871                 if (left < 0)
1872                         return 0;
1873                 /* ... fill it in... */
1874                 *pos++ = WLAN_EID_SSID;
1875                 *pos++ = priv->essid_len;
1876                 memcpy(pos, priv->essid, priv->essid_len);
1877                 pos += priv->essid_len;
1878                 len += 2 + priv->essid_len;
1879         }
1880
1881         /* fill in supported rate */
1882         /* ...next IE... */
1883         left -= 2;
1884         if (left < 0)
1885                 return 0;
1886
1887         /* ... fill it in... */
1888         *pos++ = WLAN_EID_SUPP_RATES;
1889         *pos = 0;
1890
1891         priv->active_rate = priv->rates_mask;
1892         active_rates = priv->active_rate;
1893         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
1894
1895         cck_rates = IWL_CCK_RATES_MASK & active_rates;
1896         ret_rates = iwl_supported_rate_to_ie(pos, cck_rates,
1897                         priv->active_rate_basic, &left);
1898         active_rates &= ~ret_rates;
1899
1900         ret_rates = iwl_supported_rate_to_ie(pos, active_rates,
1901                                  priv->active_rate_basic, &left);
1902         active_rates &= ~ret_rates;
1903
1904         len += 2 + *pos;
1905         pos += (*pos) + 1;
1906         if (active_rates == 0)
1907                 goto fill_end;
1908
1909         /* fill in supported extended rate */
1910         /* ...next IE... */
1911         left -= 2;
1912         if (left < 0)
1913                 return 0;
1914         /* ... fill it in... */
1915         *pos++ = WLAN_EID_EXT_SUPP_RATES;
1916         *pos = 0;
1917         iwl_supported_rate_to_ie(pos, active_rates,
1918                                  priv->active_rate_basic, &left);
1919         if (*pos > 0)
1920                 len += 2 + *pos;
1921
1922 #ifdef CONFIG_IWLWIFI_HT
1923         if (is_direct && priv->is_ht_enabled) {
1924                 u8 use_wide_chan = 1;
1925
1926                 if (priv->channel_width != IWL_CHANNEL_WIDTH_40MHZ)
1927                         use_wide_chan = 0;
1928                 pos += (*pos) + 1;
1929                 *pos++ = WLAN_EID_HT_CAPABILITY;
1930                 *pos++ = sizeof(struct ieee80211_ht_capability);
1931                 iwl_set_ht_capab(NULL, (struct ieee80211_ht_capability *)pos,
1932                                  use_wide_chan);
1933                 len += 2 + sizeof(struct ieee80211_ht_capability);
1934         }
1935 #endif  /*CONFIG_IWLWIFI_HT */
1936
1937  fill_end:
1938         return (u16)len;
1939 }
1940
1941 /*
1942  * QoS  support
1943 */
1944 #ifdef CONFIG_IWLWIFI_QOS
1945 static int iwl_send_qos_params_command(struct iwl_priv *priv,
1946                                        struct iwl_qosparam_cmd *qos)
1947 {
1948
1949         return iwl_send_cmd_pdu(priv, REPLY_QOS_PARAM,
1950                                 sizeof(struct iwl_qosparam_cmd), qos);
1951 }
1952
1953 static void iwl_reset_qos(struct iwl_priv *priv)
1954 {
1955         u16 cw_min = 15;
1956         u16 cw_max = 1023;
1957         u8 aifs = 2;
1958         u8 is_legacy = 0;
1959         unsigned long flags;
1960         int i;
1961
1962         spin_lock_irqsave(&priv->lock, flags);
1963         priv->qos_data.qos_active = 0;
1964
1965         if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS) {
1966                 if (priv->qos_data.qos_enable)
1967                         priv->qos_data.qos_active = 1;
1968                 if (!(priv->active_rate & 0xfff0)) {
1969                         cw_min = 31;
1970                         is_legacy = 1;
1971                 }
1972         } else if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
1973                 if (priv->qos_data.qos_enable)
1974                         priv->qos_data.qos_active = 1;
1975         } else if (!(priv->staging_rxon.flags & RXON_FLG_SHORT_SLOT_MSK)) {
1976                 cw_min = 31;
1977                 is_legacy = 1;
1978         }
1979
1980         if (priv->qos_data.qos_active)
1981                 aifs = 3;
1982
1983         priv->qos_data.def_qos_parm.ac[0].cw_min = cpu_to_le16(cw_min);
1984         priv->qos_data.def_qos_parm.ac[0].cw_max = cpu_to_le16(cw_max);
1985         priv->qos_data.def_qos_parm.ac[0].aifsn = aifs;
1986         priv->qos_data.def_qos_parm.ac[0].edca_txop = 0;
1987         priv->qos_data.def_qos_parm.ac[0].reserved1 = 0;
1988
1989         if (priv->qos_data.qos_active) {
1990                 i = 1;
1991                 priv->qos_data.def_qos_parm.ac[i].cw_min = cpu_to_le16(cw_min);
1992                 priv->qos_data.def_qos_parm.ac[i].cw_max = cpu_to_le16(cw_max);
1993                 priv->qos_data.def_qos_parm.ac[i].aifsn = 7;
1994                 priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
1995                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
1996
1997                 i = 2;
1998                 priv->qos_data.def_qos_parm.ac[i].cw_min =
1999                         cpu_to_le16((cw_min + 1) / 2 - 1);
2000                 priv->qos_data.def_qos_parm.ac[i].cw_max =
2001                         cpu_to_le16(cw_max);
2002                 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
2003                 if (is_legacy)
2004                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
2005                                 cpu_to_le16(6016);
2006                 else
2007                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
2008                                 cpu_to_le16(3008);
2009                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
2010
2011                 i = 3;
2012                 priv->qos_data.def_qos_parm.ac[i].cw_min =
2013                         cpu_to_le16((cw_min + 1) / 4 - 1);
2014                 priv->qos_data.def_qos_parm.ac[i].cw_max =
2015                         cpu_to_le16((cw_max + 1) / 2 - 1);
2016                 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
2017                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
2018                 if (is_legacy)
2019                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
2020                                 cpu_to_le16(3264);
2021                 else
2022                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
2023                                 cpu_to_le16(1504);
2024         } else {
2025                 for (i = 1; i < 4; i++) {
2026                         priv->qos_data.def_qos_parm.ac[i].cw_min =
2027                                 cpu_to_le16(cw_min);
2028                         priv->qos_data.def_qos_parm.ac[i].cw_max =
2029                                 cpu_to_le16(cw_max);
2030                         priv->qos_data.def_qos_parm.ac[i].aifsn = aifs;
2031                         priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
2032                         priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
2033                 }
2034         }
2035         IWL_DEBUG_QOS("set QoS to default \n");
2036
2037         spin_unlock_irqrestore(&priv->lock, flags);
2038 }
2039
2040 static void iwl_activate_qos(struct iwl_priv *priv, u8 force)
2041 {
2042         unsigned long flags;
2043
2044         if (priv == NULL)
2045                 return;
2046
2047         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2048                 return;
2049
2050         if (!priv->qos_data.qos_enable)
2051                 return;
2052
2053         spin_lock_irqsave(&priv->lock, flags);
2054         priv->qos_data.def_qos_parm.qos_flags = 0;
2055
2056         if (priv->qos_data.qos_cap.q_AP.queue_request &&
2057             !priv->qos_data.qos_cap.q_AP.txop_request)
2058                 priv->qos_data.def_qos_parm.qos_flags |=
2059                         QOS_PARAM_FLG_TXOP_TYPE_MSK;
2060
2061         if (priv->qos_data.qos_active)
2062                 priv->qos_data.def_qos_parm.qos_flags |=
2063                         QOS_PARAM_FLG_UPDATE_EDCA_MSK;
2064
2065         spin_unlock_irqrestore(&priv->lock, flags);
2066
2067         if (force || iwl_is_associated(priv)) {
2068                 IWL_DEBUG_QOS("send QoS cmd with Qos active %d \n",
2069                               priv->qos_data.qos_active);
2070
2071                 iwl_send_qos_params_command(priv,
2072                                 &(priv->qos_data.def_qos_parm));
2073         }
2074 }
2075
2076 #endif /* CONFIG_IWLWIFI_QOS */
2077 /*
2078  * Power management (not Tx power!) functions
2079  */
2080 #define MSEC_TO_USEC 1024
2081
2082 #define NOSLP __constant_cpu_to_le16(0), 0, 0
2083 #define SLP IWL_POWER_DRIVER_ALLOW_SLEEP_MSK, 0, 0
2084 #define SLP_TIMEOUT(T) __constant_cpu_to_le32((T) * MSEC_TO_USEC)
2085 #define SLP_VEC(X0, X1, X2, X3, X4) {__constant_cpu_to_le32(X0), \
2086                                      __constant_cpu_to_le32(X1), \
2087                                      __constant_cpu_to_le32(X2), \
2088                                      __constant_cpu_to_le32(X3), \
2089                                      __constant_cpu_to_le32(X4)}
2090
2091
2092 /* default power management (not Tx power) table values */
2093 /* for tim  0-10 */
2094 static struct iwl_power_vec_entry range_0[IWL_POWER_AC] = {
2095         {{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
2096         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500), SLP_VEC(1, 2, 3, 4, 4)}, 0},
2097         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300), SLP_VEC(2, 4, 6, 7, 7)}, 0},
2098         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100), SLP_VEC(2, 6, 9, 9, 10)}, 0},
2099         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 10)}, 1},
2100         {{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25), SLP_VEC(4, 7, 10, 10, 10)}, 1}
2101 };
2102
2103 /* for tim > 10 */
2104 static struct iwl_power_vec_entry range_1[IWL_POWER_AC] = {
2105         {{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
2106         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500),
2107                  SLP_VEC(1, 2, 3, 4, 0xFF)}, 0},
2108         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300),
2109                  SLP_VEC(2, 4, 6, 7, 0xFF)}, 0},
2110         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100),
2111                  SLP_VEC(2, 6, 9, 9, 0xFF)}, 0},
2112         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 0xFF)}, 0},
2113         {{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25),
2114                  SLP_VEC(4, 7, 10, 10, 0xFF)}, 0}
2115 };
2116
2117 int iwl_power_init_handle(struct iwl_priv *priv)
2118 {
2119         int rc = 0, i;
2120         struct iwl_power_mgr *pow_data;
2121         int size = sizeof(struct iwl_power_vec_entry) * IWL_POWER_AC;
2122         u16 pci_pm;
2123
2124         IWL_DEBUG_POWER("Initialize power \n");
2125
2126         pow_data = &(priv->power_data);
2127
2128         memset(pow_data, 0, sizeof(*pow_data));
2129
2130         pow_data->active_index = IWL_POWER_RANGE_0;
2131         pow_data->dtim_val = 0xffff;
2132
2133         memcpy(&pow_data->pwr_range_0[0], &range_0[0], size);
2134         memcpy(&pow_data->pwr_range_1[0], &range_1[0], size);
2135
2136         rc = pci_read_config_word(priv->pci_dev, PCI_LINK_CTRL, &pci_pm);
2137         if (rc != 0)
2138                 return 0;
2139         else {
2140                 struct iwl_powertable_cmd *cmd;
2141
2142                 IWL_DEBUG_POWER("adjust power command flags\n");
2143
2144                 for (i = 0; i < IWL_POWER_AC; i++) {
2145                         cmd = &pow_data->pwr_range_0[i].cmd;
2146
2147                         if (pci_pm & 0x1)
2148                                 cmd->flags &= ~IWL_POWER_PCI_PM_MSK;
2149                         else
2150                                 cmd->flags |= IWL_POWER_PCI_PM_MSK;
2151                 }
2152         }
2153         return rc;
2154 }
2155
2156 static int iwl_update_power_cmd(struct iwl_priv *priv,
2157                                 struct iwl_powertable_cmd *cmd, u32 mode)
2158 {
2159         int rc = 0, i;
2160         u8 skip;
2161         u32 max_sleep = 0;
2162         struct iwl_power_vec_entry *range;
2163         u8 period = 0;
2164         struct iwl_power_mgr *pow_data;
2165
2166         if (mode > IWL_POWER_INDEX_5) {
2167                 IWL_DEBUG_POWER("Error invalid power mode \n");
2168                 return -1;
2169         }
2170         pow_data = &(priv->power_data);
2171
2172         if (pow_data->active_index == IWL_POWER_RANGE_0)
2173                 range = &pow_data->pwr_range_0[0];
2174         else
2175                 range = &pow_data->pwr_range_1[1];
2176
2177         memcpy(cmd, &range[mode].cmd, sizeof(struct iwl_powertable_cmd));
2178
2179 #ifdef IWL_MAC80211_DISABLE
2180         if (priv->assoc_network != NULL) {
2181                 unsigned long flags;
2182
2183                 period = priv->assoc_network->tim.tim_period;
2184         }
2185 #endif  /*IWL_MAC80211_DISABLE */
2186         skip = range[mode].no_dtim;
2187
2188         if (period == 0) {
2189                 period = 1;
2190                 skip = 0;
2191         }
2192
2193         if (skip == 0) {
2194                 max_sleep = period;
2195                 cmd->flags &= ~IWL_POWER_SLEEP_OVER_DTIM_MSK;
2196         } else {
2197                 __le32 slp_itrvl = cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1];
2198                 max_sleep = (le32_to_cpu(slp_itrvl) / period) * period;
2199                 cmd->flags |= IWL_POWER_SLEEP_OVER_DTIM_MSK;
2200         }
2201
2202         for (i = 0; i < IWL_POWER_VEC_SIZE; i++) {
2203                 if (le32_to_cpu(cmd->sleep_interval[i]) > max_sleep)
2204                         cmd->sleep_interval[i] = cpu_to_le32(max_sleep);
2205         }
2206
2207         IWL_DEBUG_POWER("Flags value = 0x%08X\n", cmd->flags);
2208         IWL_DEBUG_POWER("Tx timeout = %u\n", le32_to_cpu(cmd->tx_data_timeout));
2209         IWL_DEBUG_POWER("Rx timeout = %u\n", le32_to_cpu(cmd->rx_data_timeout));
2210         IWL_DEBUG_POWER("Sleep interval vector = { %d , %d , %d , %d , %d }\n",
2211                         le32_to_cpu(cmd->sleep_interval[0]),
2212                         le32_to_cpu(cmd->sleep_interval[1]),
2213                         le32_to_cpu(cmd->sleep_interval[2]),
2214                         le32_to_cpu(cmd->sleep_interval[3]),
2215                         le32_to_cpu(cmd->sleep_interval[4]));
2216
2217         return rc;
2218 }
2219
2220 static int iwl_send_power_mode(struct iwl_priv *priv, u32 mode)
2221 {
2222         u32 final_mode = mode;
2223         int rc;
2224         struct iwl_powertable_cmd cmd;
2225
2226         /* If on battery, set to 3,
2227          * if plugged into AC power, set to CAM ("continuosly aware mode"),
2228          * else user level */
2229         switch (mode) {
2230         case IWL_POWER_BATTERY:
2231                 final_mode = IWL_POWER_INDEX_3;
2232                 break;
2233         case IWL_POWER_AC:
2234                 final_mode = IWL_POWER_MODE_CAM;
2235                 break;
2236         default:
2237                 final_mode = mode;
2238                 break;
2239         }
2240
2241         cmd.keep_alive_beacons = 0;
2242
2243         iwl_update_power_cmd(priv, &cmd, final_mode);
2244
2245         rc = iwl_send_cmd_pdu(priv, POWER_TABLE_CMD, sizeof(cmd), &cmd);
2246
2247         if (final_mode == IWL_POWER_MODE_CAM)
2248                 clear_bit(STATUS_POWER_PMI, &priv->status);
2249         else
2250                 set_bit(STATUS_POWER_PMI, &priv->status);
2251
2252         return rc;
2253 }
2254
2255 int iwl_is_network_packet(struct iwl_priv *priv, struct ieee80211_hdr *header)
2256 {
2257         /* Filter incoming packets to determine if they are targeted toward
2258          * this network, discarding packets coming from ourselves */
2259         switch (priv->iw_mode) {
2260         case IEEE80211_IF_TYPE_IBSS: /* Header: Dest. | Source    | BSSID */
2261                 /* packets from our adapter are dropped (echo) */
2262                 if (!compare_ether_addr(header->addr2, priv->mac_addr))
2263                         return 0;
2264                 /* {broad,multi}cast packets to our IBSS go through */
2265                 if (is_multicast_ether_addr(header->addr1))
2266                         return !compare_ether_addr(header->addr3, priv->bssid);
2267                 /* packets to our adapter go through */
2268                 return !compare_ether_addr(header->addr1, priv->mac_addr);
2269         case IEEE80211_IF_TYPE_STA: /* Header: Dest. | AP{BSSID} | Source */
2270                 /* packets from our adapter are dropped (echo) */
2271                 if (!compare_ether_addr(header->addr3, priv->mac_addr))
2272                         return 0;
2273                 /* {broad,multi}cast packets to our BSS go through */
2274                 if (is_multicast_ether_addr(header->addr1))
2275                         return !compare_ether_addr(header->addr2, priv->bssid);
2276                 /* packets to our adapter go through */
2277                 return !compare_ether_addr(header->addr1, priv->mac_addr);
2278         }
2279
2280         return 1;
2281 }
2282
2283 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
2284
2285 const char *iwl_get_tx_fail_reason(u32 status)
2286 {
2287         switch (status & TX_STATUS_MSK) {
2288         case TX_STATUS_SUCCESS:
2289                 return "SUCCESS";
2290                 TX_STATUS_ENTRY(SHORT_LIMIT);
2291                 TX_STATUS_ENTRY(LONG_LIMIT);
2292                 TX_STATUS_ENTRY(FIFO_UNDERRUN);
2293                 TX_STATUS_ENTRY(MGMNT_ABORT);
2294                 TX_STATUS_ENTRY(NEXT_FRAG);
2295                 TX_STATUS_ENTRY(LIFE_EXPIRE);
2296                 TX_STATUS_ENTRY(DEST_PS);
2297                 TX_STATUS_ENTRY(ABORTED);
2298                 TX_STATUS_ENTRY(BT_RETRY);
2299                 TX_STATUS_ENTRY(STA_INVALID);
2300                 TX_STATUS_ENTRY(FRAG_DROPPED);
2301                 TX_STATUS_ENTRY(TID_DISABLE);
2302                 TX_STATUS_ENTRY(FRAME_FLUSHED);
2303                 TX_STATUS_ENTRY(INSUFFICIENT_CF_POLL);
2304                 TX_STATUS_ENTRY(TX_LOCKED);
2305                 TX_STATUS_ENTRY(NO_BEACON_ON_RADAR);
2306         }
2307
2308         return "UNKNOWN";
2309 }
2310
2311 /**
2312  * iwl_scan_cancel - Cancel any currently executing HW scan
2313  *
2314  * NOTE: priv->mutex is not required before calling this function
2315  */
2316 static int iwl_scan_cancel(struct iwl_priv *priv)
2317 {
2318         if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
2319                 clear_bit(STATUS_SCANNING, &priv->status);
2320                 return 0;
2321         }
2322
2323         if (test_bit(STATUS_SCANNING, &priv->status)) {
2324                 if (!test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2325                         IWL_DEBUG_SCAN("Queuing scan abort.\n");
2326                         set_bit(STATUS_SCAN_ABORTING, &priv->status);
2327                         queue_work(priv->workqueue, &priv->abort_scan);
2328
2329                 } else
2330                         IWL_DEBUG_SCAN("Scan abort already in progress.\n");
2331
2332                 return test_bit(STATUS_SCANNING, &priv->status);
2333         }
2334
2335         return 0;
2336 }
2337
2338 /**
2339  * iwl_scan_cancel_timeout - Cancel any currently executing HW scan
2340  * @ms: amount of time to wait (in milliseconds) for scan to abort
2341  *
2342  * NOTE: priv->mutex must be held before calling this function
2343  */
2344 static int iwl_scan_cancel_timeout(struct iwl_priv *priv, unsigned long ms)
2345 {
2346         unsigned long now = jiffies;
2347         int ret;
2348
2349         ret = iwl_scan_cancel(priv);
2350         if (ret && ms) {
2351                 mutex_unlock(&priv->mutex);
2352                 while (!time_after(jiffies, now + msecs_to_jiffies(ms)) &&
2353                                 test_bit(STATUS_SCANNING, &priv->status))
2354                         msleep(1);
2355                 mutex_lock(&priv->mutex);
2356
2357                 return test_bit(STATUS_SCANNING, &priv->status);
2358         }
2359
2360         return ret;
2361 }
2362
2363 static void iwl_sequence_reset(struct iwl_priv *priv)
2364 {
2365         /* Reset ieee stats */
2366
2367         /* We don't reset the net_device_stats (ieee->stats) on
2368          * re-association */
2369
2370         priv->last_seq_num = -1;
2371         priv->last_frag_num = -1;
2372         priv->last_packet_time = 0;
2373
2374         iwl_scan_cancel(priv);
2375 }
2376
2377 #define MAX_UCODE_BEACON_INTERVAL       4096
2378 #define INTEL_CONN_LISTEN_INTERVAL      __constant_cpu_to_le16(0xA)
2379
2380 static __le16 iwl_adjust_beacon_interval(u16 beacon_val)
2381 {
2382         u16 new_val = 0;
2383         u16 beacon_factor = 0;
2384
2385         beacon_factor =
2386             (beacon_val + MAX_UCODE_BEACON_INTERVAL)
2387                 / MAX_UCODE_BEACON_INTERVAL;
2388         new_val = beacon_val / beacon_factor;
2389
2390         return cpu_to_le16(new_val);
2391 }
2392
2393 static void iwl_setup_rxon_timing(struct iwl_priv *priv)
2394 {
2395         u64 interval_tm_unit;
2396         u64 tsf, result;
2397         unsigned long flags;
2398         struct ieee80211_conf *conf = NULL;
2399         u16 beacon_int = 0;
2400
2401         conf = ieee80211_get_hw_conf(priv->hw);
2402
2403         spin_lock_irqsave(&priv->lock, flags);
2404         priv->rxon_timing.timestamp.dw[1] = cpu_to_le32(priv->timestamp1);
2405         priv->rxon_timing.timestamp.dw[0] = cpu_to_le32(priv->timestamp0);
2406
2407         priv->rxon_timing.listen_interval = INTEL_CONN_LISTEN_INTERVAL;
2408
2409         tsf = priv->timestamp1;
2410         tsf = ((tsf << 32) | priv->timestamp0);
2411
2412         beacon_int = priv->beacon_int;
2413         spin_unlock_irqrestore(&priv->lock, flags);
2414
2415         if (priv->iw_mode == IEEE80211_IF_TYPE_STA) {
2416                 if (beacon_int == 0) {
2417                         priv->rxon_timing.beacon_interval = cpu_to_le16(100);
2418                         priv->rxon_timing.beacon_init_val = cpu_to_le32(102400);
2419                 } else {
2420                         priv->rxon_timing.beacon_interval =
2421                                 cpu_to_le16(beacon_int);
2422                         priv->rxon_timing.beacon_interval =
2423                             iwl_adjust_beacon_interval(
2424                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
2425                 }
2426
2427                 priv->rxon_timing.atim_window = 0;
2428         } else {
2429                 priv->rxon_timing.beacon_interval =
2430                         iwl_adjust_beacon_interval(conf->beacon_int);
2431                 /* TODO: we need to get atim_window from upper stack
2432                  * for now we set to 0 */
2433                 priv->rxon_timing.atim_window = 0;
2434         }
2435
2436         interval_tm_unit =
2437                 (le16_to_cpu(priv->rxon_timing.beacon_interval) * 1024);
2438         result = do_div(tsf, interval_tm_unit);
2439         priv->rxon_timing.beacon_init_val =
2440             cpu_to_le32((u32) ((u64) interval_tm_unit - result));
2441
2442         IWL_DEBUG_ASSOC
2443             ("beacon interval %d beacon timer %d beacon tim %d\n",
2444                 le16_to_cpu(priv->rxon_timing.beacon_interval),
2445                 le32_to_cpu(priv->rxon_timing.beacon_init_val),
2446                 le16_to_cpu(priv->rxon_timing.atim_window));
2447 }
2448
2449 static int iwl_scan_initiate(struct iwl_priv *priv)
2450 {
2451         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
2452                 IWL_ERROR("APs don't scan.\n");
2453                 return 0;
2454         }
2455
2456         if (!iwl_is_ready_rf(priv)) {
2457                 IWL_DEBUG_SCAN("Aborting scan due to not ready.\n");
2458                 return -EIO;
2459         }
2460
2461         if (test_bit(STATUS_SCANNING, &priv->status)) {
2462                 IWL_DEBUG_SCAN("Scan already in progress.\n");
2463                 return -EAGAIN;
2464         }
2465
2466         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
2467                 IWL_DEBUG_SCAN("Scan request while abort pending.  "
2468                                "Queuing.\n");
2469                 return -EAGAIN;
2470         }
2471
2472         IWL_DEBUG_INFO("Starting scan...\n");
2473         priv->scan_bands = 2;
2474         set_bit(STATUS_SCANNING, &priv->status);
2475         priv->scan_start = jiffies;
2476         priv->scan_pass_start = priv->scan_start;
2477
2478         queue_work(priv->workqueue, &priv->request_scan);
2479
2480         return 0;
2481 }
2482
2483 static int iwl_set_rxon_hwcrypto(struct iwl_priv *priv, int hw_decrypt)
2484 {
2485         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
2486
2487         if (hw_decrypt)
2488                 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
2489         else
2490                 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
2491
2492         return 0;
2493 }
2494
2495 static void iwl_set_flags_for_phymode(struct iwl_priv *priv, u8 phymode)
2496 {
2497         if (phymode == MODE_IEEE80211A) {
2498                 priv->staging_rxon.flags &=
2499                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
2500                       | RXON_FLG_CCK_MSK);
2501                 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2502         } else {
2503                 /* Copied from iwl_bg_post_associate() */
2504                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
2505                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2506                 else
2507                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2508
2509                 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
2510                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2511
2512                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
2513                 priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
2514                 priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
2515         }
2516 }
2517
2518 /*
2519  * initilize rxon structure with default values fromm eeprom
2520  */
2521 static void iwl_connection_init_rx_config(struct iwl_priv *priv)
2522 {
2523         const struct iwl_channel_info *ch_info;
2524
2525         memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
2526
2527         switch (priv->iw_mode) {
2528         case IEEE80211_IF_TYPE_AP:
2529                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
2530                 break;
2531
2532         case IEEE80211_IF_TYPE_STA:
2533                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
2534                 priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
2535                 break;
2536
2537         case IEEE80211_IF_TYPE_IBSS:
2538                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
2539                 priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
2540                 priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
2541                                                   RXON_FILTER_ACCEPT_GRP_MSK;
2542                 break;
2543
2544         case IEEE80211_IF_TYPE_MNTR:
2545                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_SNIFFER;
2546                 priv->staging_rxon.filter_flags = RXON_FILTER_PROMISC_MSK |
2547                     RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_ACCEPT_GRP_MSK;
2548                 break;
2549         }
2550
2551 #if 0
2552         /* TODO:  Figure out when short_preamble would be set and cache from
2553          * that */
2554         if (!hw_to_local(priv->hw)->short_preamble)
2555                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2556         else
2557                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2558 #endif
2559
2560         ch_info = iwl_get_channel_info(priv, priv->phymode,
2561                                        le16_to_cpu(priv->staging_rxon.channel));
2562
2563         if (!ch_info)
2564                 ch_info = &priv->channel_info[0];
2565
2566         /*
2567          * in some case A channels are all non IBSS
2568          * in this case force B/G channel
2569          */
2570         if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) &&
2571             !(is_channel_ibss(ch_info)))
2572                 ch_info = &priv->channel_info[0];
2573
2574         priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
2575         if (is_channel_a_band(ch_info))
2576                 priv->phymode = MODE_IEEE80211A;
2577         else
2578                 priv->phymode = MODE_IEEE80211G;
2579
2580         iwl_set_flags_for_phymode(priv, priv->phymode);
2581
2582         priv->staging_rxon.ofdm_basic_rates =
2583             (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
2584         priv->staging_rxon.cck_basic_rates =
2585             (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
2586
2587         priv->staging_rxon.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED_MSK |
2588                                         RXON_FLG_CHANNEL_MODE_PURE_40_MSK);
2589         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2590         memcpy(priv->staging_rxon.wlap_bssid_addr, priv->mac_addr, ETH_ALEN);
2591         priv->staging_rxon.ofdm_ht_single_stream_basic_rates = 0xff;
2592         priv->staging_rxon.ofdm_ht_dual_stream_basic_rates = 0xff;
2593         iwl4965_set_rxon_chain(priv);
2594 }
2595
2596 static int iwl_set_mode(struct iwl_priv *priv, int mode)
2597 {
2598         if (!iwl_is_ready_rf(priv))
2599                 return -EAGAIN;
2600
2601         if (mode == IEEE80211_IF_TYPE_IBSS) {
2602                 const struct iwl_channel_info *ch_info;
2603
2604                 ch_info = iwl_get_channel_info(priv,
2605                         priv->phymode,
2606                         le16_to_cpu(priv->staging_rxon.channel));
2607
2608                 if (!ch_info || !is_channel_ibss(ch_info)) {
2609                         IWL_ERROR("channel %d not IBSS channel\n",
2610                                   le16_to_cpu(priv->staging_rxon.channel));
2611                         return -EINVAL;
2612                 }
2613         }
2614
2615         cancel_delayed_work(&priv->scan_check);
2616         if (iwl_scan_cancel_timeout(priv, 100)) {
2617                 IWL_WARNING("Aborted scan still in progress after 100ms\n");
2618                 IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
2619                 return -EAGAIN;
2620         }
2621
2622         priv->iw_mode = mode;
2623
2624         iwl_connection_init_rx_config(priv);
2625         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2626
2627         iwl_clear_stations_table(priv);
2628
2629         iwl_commit_rxon(priv);
2630
2631         return 0;
2632 }
2633
2634 static void iwl_build_tx_cmd_hwcrypto(struct iwl_priv *priv,
2635                                       struct ieee80211_tx_control *ctl,
2636                                       struct iwl_cmd *cmd,
2637                                       struct sk_buff *skb_frag,
2638                                       int last_frag)
2639 {
2640         struct iwl_hw_key *keyinfo = &priv->stations[ctl->key_idx].keyinfo;
2641
2642         switch (keyinfo->alg) {
2643         case ALG_CCMP:
2644                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_CCM;
2645                 memcpy(cmd->cmd.tx.key, keyinfo->key, keyinfo->keylen);
2646                 IWL_DEBUG_TX("tx_cmd with aes hwcrypto\n");
2647                 break;
2648
2649         case ALG_TKIP:
2650 #if 0
2651                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_TKIP;
2652
2653                 if (last_frag)
2654                         memcpy(cmd->cmd.tx.tkip_mic.byte, skb_frag->tail - 8,
2655                                8);
2656                 else
2657                         memset(cmd->cmd.tx.tkip_mic.byte, 0, 8);
2658 #endif
2659                 break;
2660
2661         case ALG_WEP:
2662                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_WEP |
2663                         (ctl->key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT;
2664
2665                 if (keyinfo->keylen == 13)
2666                         cmd->cmd.tx.sec_ctl |= TX_CMD_SEC_KEY128;
2667
2668                 memcpy(&cmd->cmd.tx.key[3], keyinfo->key, keyinfo->keylen);
2669
2670                 IWL_DEBUG_TX("Configuring packet for WEP encryption "
2671                              "with key %d\n", ctl->key_idx);
2672                 break;
2673
2674         default:
2675                 printk(KERN_ERR "Unknown encode alg %d\n", keyinfo->alg);
2676                 break;
2677         }
2678 }
2679
2680 /*
2681  * handle build REPLY_TX command notification.
2682  */
2683 static void iwl_build_tx_cmd_basic(struct iwl_priv *priv,
2684                                   struct iwl_cmd *cmd,
2685                                   struct ieee80211_tx_control *ctrl,
2686                                   struct ieee80211_hdr *hdr,
2687                                   int is_unicast, u8 std_id)
2688 {
2689         __le16 *qc;
2690         u16 fc = le16_to_cpu(hdr->frame_control);
2691         __le32 tx_flags = cmd->cmd.tx.tx_flags;
2692
2693         cmd->cmd.tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2694         if (!(ctrl->flags & IEEE80211_TXCTL_NO_ACK)) {
2695                 tx_flags |= TX_CMD_FLG_ACK_MSK;
2696                 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT)
2697                         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2698                 if (ieee80211_is_probe_response(fc) &&
2699                     !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
2700                         tx_flags |= TX_CMD_FLG_TSF_MSK;
2701         } else {
2702                 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
2703                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2704         }
2705
2706         cmd->cmd.tx.sta_id = std_id;
2707         if (ieee80211_get_morefrag(hdr))
2708                 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
2709
2710         qc = ieee80211_get_qos_ctrl(hdr);
2711         if (qc) {
2712                 cmd->cmd.tx.tid_tspec = (u8) (le16_to_cpu(*qc) & 0xf);
2713                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
2714         } else
2715                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2716
2717         if (ctrl->flags & IEEE80211_TXCTL_USE_RTS_CTS) {
2718                 tx_flags |= TX_CMD_FLG_RTS_MSK;
2719                 tx_flags &= ~TX_CMD_FLG_CTS_MSK;
2720         } else if (ctrl->flags & IEEE80211_TXCTL_USE_CTS_PROTECT) {
2721                 tx_flags &= ~TX_CMD_FLG_RTS_MSK;
2722                 tx_flags |= TX_CMD_FLG_CTS_MSK;
2723         }
2724
2725         if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
2726                 tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
2727
2728         tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
2729         if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
2730                 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_ASSOC_REQ ||
2731                     (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_REASSOC_REQ)
2732                         cmd->cmd.tx.timeout.pm_frame_timeout =
2733                                 cpu_to_le16(3);
2734                 else
2735                         cmd->cmd.tx.timeout.pm_frame_timeout =
2736                                 cpu_to_le16(2);
2737         } else
2738                 cmd->cmd.tx.timeout.pm_frame_timeout = 0;
2739
2740         cmd->cmd.tx.driver_txop = 0;
2741         cmd->cmd.tx.tx_flags = tx_flags;
2742         cmd->cmd.tx.next_frame_len = 0;
2743 }
2744
2745 static int iwl_get_sta_id(struct iwl_priv *priv, struct ieee80211_hdr *hdr)
2746 {
2747         int sta_id;
2748         u16 fc = le16_to_cpu(hdr->frame_control);
2749         DECLARE_MAC_BUF(mac);
2750
2751         /* If this frame is broadcast or not data then use the broadcast
2752          * station id */
2753         if (((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) ||
2754             is_multicast_ether_addr(hdr->addr1))
2755                 return priv->hw_setting.bcast_sta_id;
2756
2757         switch (priv->iw_mode) {
2758
2759         /* If this frame is part of a BSS network (we're a station), then
2760          * we use the AP's station id */
2761         case IEEE80211_IF_TYPE_STA:
2762                 return IWL_AP_ID;
2763
2764         /* If we are an AP, then find the station, or use BCAST */
2765         case IEEE80211_IF_TYPE_AP:
2766                 sta_id = iwl_hw_find_station(priv, hdr->addr1);
2767                 if (sta_id != IWL_INVALID_STATION)
2768                         return sta_id;
2769                 return priv->hw_setting.bcast_sta_id;
2770
2771         /* If this frame is part of a IBSS network, then we use the
2772          * target specific station id */
2773         case IEEE80211_IF_TYPE_IBSS:
2774                 sta_id = iwl_hw_find_station(priv, hdr->addr1);
2775                 if (sta_id != IWL_INVALID_STATION)
2776                         return sta_id;
2777
2778                 sta_id = iwl_add_station(priv, hdr->addr1, 0, CMD_ASYNC);
2779
2780                 if (sta_id != IWL_INVALID_STATION)
2781                         return sta_id;
2782
2783                 IWL_DEBUG_DROP("Station %s not in station map. "
2784                                "Defaulting to broadcast...\n",
2785                                print_mac(mac, hdr->addr1));
2786                 iwl_print_hex_dump(IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
2787                 return priv->hw_setting.bcast_sta_id;
2788
2789         default:
2790                 IWL_WARNING("Unkown mode of operation: %d", priv->iw_mode);
2791                 return priv->hw_setting.bcast_sta_id;
2792         }
2793 }
2794
2795 /*
2796  * start REPLY_TX command process
2797  */
2798 static int iwl_tx_skb(struct iwl_priv *priv,
2799                       struct sk_buff *skb, struct ieee80211_tx_control *ctl)
2800 {
2801         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
2802         struct iwl_tfd_frame *tfd;
2803         u32 *control_flags;
2804         int txq_id = ctl->queue;
2805         struct iwl_tx_queue *txq = NULL;
2806         struct iwl_queue *q = NULL;
2807         dma_addr_t phys_addr;
2808         dma_addr_t txcmd_phys;
2809         struct iwl_cmd *out_cmd = NULL;
2810         u16 len, idx, len_org;
2811         u8 id, hdr_len, unicast;
2812         u8 sta_id;
2813         u16 seq_number = 0;
2814         u16 fc;
2815         __le16 *qc;
2816         u8 wait_write_ptr = 0;
2817         unsigned long flags;
2818         int rc;
2819
2820         spin_lock_irqsave(&priv->lock, flags);
2821         if (iwl_is_rfkill(priv)) {
2822                 IWL_DEBUG_DROP("Dropping - RF KILL\n");
2823                 goto drop_unlock;
2824         }
2825
2826         if (!priv->interface_id) {
2827                 IWL_DEBUG_DROP("Dropping - !priv->interface_id\n");
2828                 goto drop_unlock;
2829         }
2830
2831         if ((ctl->tx_rate & 0xFF) == IWL_INVALID_RATE) {
2832                 IWL_ERROR("ERROR: No TX rate available.\n");
2833                 goto drop_unlock;
2834         }
2835
2836         unicast = !is_multicast_ether_addr(hdr->addr1);
2837         id = 0;
2838
2839         fc = le16_to_cpu(hdr->frame_control);
2840
2841 #ifdef CONFIG_IWLWIFI_DEBUG
2842         if (ieee80211_is_auth(fc))
2843                 IWL_DEBUG_TX("Sending AUTH frame\n");
2844         else if (ieee80211_is_assoc_request(fc))
2845                 IWL_DEBUG_TX("Sending ASSOC frame\n");
2846         else if (ieee80211_is_reassoc_request(fc))
2847                 IWL_DEBUG_TX("Sending REASSOC frame\n");
2848 #endif
2849
2850         if (!iwl_is_associated(priv) &&
2851             ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA)) {
2852                 IWL_DEBUG_DROP("Dropping - !iwl_is_associated\n");
2853                 goto drop_unlock;
2854         }
2855
2856         spin_unlock_irqrestore(&priv->lock, flags);
2857
2858         hdr_len = ieee80211_get_hdrlen(fc);
2859         sta_id = iwl_get_sta_id(priv, hdr);
2860         if (sta_id == IWL_INVALID_STATION) {
2861                 DECLARE_MAC_BUF(mac);
2862
2863                 IWL_DEBUG_DROP("Dropping - INVALID STATION: %s\n",
2864                                print_mac(mac, hdr->addr1));
2865                 goto drop;
2866         }
2867
2868         IWL_DEBUG_RATE("station Id %d\n", sta_id);
2869
2870         qc = ieee80211_get_qos_ctrl(hdr);
2871         if (qc) {
2872                 u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
2873                 seq_number = priv->stations[sta_id].tid[tid].seq_number &
2874                                 IEEE80211_SCTL_SEQ;
2875                 hdr->seq_ctrl = cpu_to_le16(seq_number) |
2876                         (hdr->seq_ctrl &
2877                                 __constant_cpu_to_le16(IEEE80211_SCTL_FRAG));
2878                 seq_number += 0x10;
2879 #ifdef CONFIG_IWLWIFI_HT
2880 #ifdef CONFIG_IWLWIFI_HT_AGG
2881                 /* aggregation is on for this <sta,tid> */
2882                 if (ctl->flags & IEEE80211_TXCTL_HT_MPDU_AGG)
2883                         txq_id = priv->stations[sta_id].tid[tid].agg.txq_id;
2884 #endif /* CONFIG_IWLWIFI_HT_AGG */
2885 #endif /* CONFIG_IWLWIFI_HT */
2886         }
2887         txq = &priv->txq[txq_id];
2888         q = &txq->q;
2889
2890         spin_lock_irqsave(&priv->lock, flags);
2891
2892         tfd = &txq->bd[q->first_empty];
2893         memset(tfd, 0, sizeof(*tfd));
2894         control_flags = (u32 *) tfd;
2895         idx = get_cmd_index(q, q->first_empty, 0);
2896
2897         memset(&(txq->txb[q->first_empty]), 0, sizeof(struct iwl_tx_info));
2898         txq->txb[q->first_empty].skb[0] = skb;
2899         memcpy(&(txq->txb[q->first_empty].status.control),
2900                ctl, sizeof(struct ieee80211_tx_control));
2901         out_cmd = &txq->cmd[idx];
2902         memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
2903         memset(&out_cmd->cmd.tx, 0, sizeof(out_cmd->cmd.tx));
2904         out_cmd->hdr.cmd = REPLY_TX;
2905         out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
2906                                 INDEX_TO_SEQ(q->first_empty)));
2907         /* copy frags header */
2908         memcpy(out_cmd->cmd.tx.hdr, hdr, hdr_len);
2909
2910         /* hdr = (struct ieee80211_hdr *)out_cmd->cmd.tx.hdr; */
2911         len = priv->hw_setting.tx_cmd_len +
2912                 sizeof(struct iwl_cmd_header) + hdr_len;
2913
2914         len_org = len;
2915         len = (len + 3) & ~3;
2916
2917         if (len_org != len)
2918                 len_org = 1;
2919         else
2920                 len_org = 0;
2921
2922         txcmd_phys = txq->dma_addr_cmd + sizeof(struct iwl_cmd) * idx +
2923                      offsetof(struct iwl_cmd, hdr);
2924
2925         iwl_hw_txq_attach_buf_to_tfd(priv, tfd, txcmd_phys, len);
2926
2927         if (!(ctl->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT))
2928                 iwl_build_tx_cmd_hwcrypto(priv, ctl, out_cmd, skb, 0);
2929
2930         /* 802.11 null functions have no payload... */
2931         len = skb->len - hdr_len;
2932         if (len) {
2933                 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
2934                                            len, PCI_DMA_TODEVICE);
2935                 iwl_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, len);
2936         }
2937
2938         if (len_org)
2939                 out_cmd->cmd.tx.tx_flags |= TX_CMD_FLG_MH_PAD_MSK;
2940
2941         len = (u16)skb->len;
2942         out_cmd->cmd.tx.len = cpu_to_le16(len);
2943
2944         /* TODO need this for burst mode later on */
2945         iwl_build_tx_cmd_basic(priv, out_cmd, ctl, hdr, unicast, sta_id);
2946
2947         /* set is_hcca to 0; it probably will never be implemented */
2948         iwl_hw_build_tx_cmd_rate(priv, out_cmd, ctl, hdr, sta_id, 0);
2949
2950         iwl4965_tx_cmd(priv, out_cmd, sta_id, txcmd_phys,
2951                        hdr, hdr_len, ctl, NULL);
2952
2953         if (!ieee80211_get_morefrag(hdr)) {
2954                 txq->need_update = 1;
2955                 if (qc) {
2956                         u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
2957                         priv->stations[sta_id].tid[tid].seq_number = seq_number;
2958                 }
2959         } else {
2960                 wait_write_ptr = 1;
2961                 txq->need_update = 0;
2962         }
2963
2964         iwl_print_hex_dump(IWL_DL_TX, out_cmd->cmd.payload,
2965                            sizeof(out_cmd->cmd.tx));
2966
2967         iwl_print_hex_dump(IWL_DL_TX, (u8 *)out_cmd->cmd.tx.hdr,
2968                            ieee80211_get_hdrlen(fc));
2969
2970         iwl4965_tx_queue_update_wr_ptr(priv, txq, len);
2971
2972         q->first_empty = iwl_queue_inc_wrap(q->first_empty, q->n_bd);
2973         rc = iwl_tx_queue_update_write_ptr(priv, txq);
2974         spin_unlock_irqrestore(&priv->lock, flags);
2975
2976         if (rc)
2977                 return rc;
2978
2979         if ((iwl_queue_space(q) < q->high_mark)
2980             && priv->mac80211_registered) {
2981                 if (wait_write_ptr) {
2982                         spin_lock_irqsave(&priv->lock, flags);
2983                         txq->need_update = 1;
2984                         iwl_tx_queue_update_write_ptr(priv, txq);
2985                         spin_unlock_irqrestore(&priv->lock, flags);
2986                 }
2987
2988                 ieee80211_stop_queue(priv->hw, ctl->queue);
2989         }
2990
2991         return 0;
2992
2993 drop_unlock:
2994         spin_unlock_irqrestore(&priv->lock, flags);
2995 drop:
2996         return -1;
2997 }
2998
2999 static void iwl_set_rate(struct iwl_priv *priv)
3000 {
3001         const struct ieee80211_hw_mode *hw = NULL;
3002         struct ieee80211_rate *rate;
3003         int i;
3004
3005         hw = iwl_get_hw_mode(priv, priv->phymode);
3006         if (!hw) {
3007                 IWL_ERROR("Failed to set rate: unable to get hw mode\n");
3008                 return;
3009         }
3010
3011         priv->active_rate = 0;
3012         priv->active_rate_basic = 0;
3013
3014         IWL_DEBUG_RATE("Setting rates for 802.11%c\n",
3015                        hw->mode == MODE_IEEE80211A ?
3016                        'a' : ((hw->mode == MODE_IEEE80211B) ? 'b' : 'g'));
3017
3018         for (i = 0; i < hw->num_rates; i++) {
3019                 rate = &(hw->rates[i]);
3020                 if ((rate->val < IWL_RATE_COUNT) &&
3021                     (rate->flags & IEEE80211_RATE_SUPPORTED)) {
3022                         IWL_DEBUG_RATE("Adding rate index %d (plcp %d)%s\n",
3023                                        rate->val, iwl_rates[rate->val].plcp,
3024                                        (rate->flags & IEEE80211_RATE_BASIC) ?
3025                                        "*" : "");
3026                         priv->active_rate |= (1 << rate->val);
3027                         if (rate->flags & IEEE80211_RATE_BASIC)
3028                                 priv->active_rate_basic |= (1 << rate->val);
3029                 } else
3030                         IWL_DEBUG_RATE("Not adding rate %d (plcp %d)\n",
3031                                        rate->val, iwl_rates[rate->val].plcp);
3032         }
3033
3034         IWL_DEBUG_RATE("Set active_rate = %0x, active_rate_basic = %0x\n",
3035                        priv->active_rate, priv->active_rate_basic);
3036
3037         /*
3038          * If a basic rate is configured, then use it (adding IWL_RATE_1M_MASK)
3039          * otherwise set it to the default of all CCK rates and 6, 12, 24 for
3040          * OFDM
3041          */
3042         if (priv->active_rate_basic & IWL_CCK_BASIC_RATES_MASK)
3043                 priv->staging_rxon.cck_basic_rates =
3044                     ((priv->active_rate_basic &
3045                       IWL_CCK_RATES_MASK) >> IWL_FIRST_CCK_RATE) & 0xF;
3046         else
3047                 priv->staging_rxon.cck_basic_rates =
3048                     (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
3049
3050         if (priv->active_rate_basic & IWL_OFDM_BASIC_RATES_MASK)
3051                 priv->staging_rxon.ofdm_basic_rates =
3052                     ((priv->active_rate_basic &
3053                       (IWL_OFDM_BASIC_RATES_MASK | IWL_RATE_6M_MASK)) >>
3054                       IWL_FIRST_OFDM_RATE) & 0xFF;
3055         else
3056                 priv->staging_rxon.ofdm_basic_rates =
3057                    (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
3058 }
3059
3060 static void iwl_radio_kill_sw(struct iwl_priv *priv, int disable_radio)
3061 {
3062         unsigned long flags;
3063
3064         if (!!disable_radio == test_bit(STATUS_RF_KILL_SW, &priv->status))
3065                 return;
3066
3067         IWL_DEBUG_RF_KILL("Manual SW RF KILL set to: RADIO %s\n",
3068                           disable_radio ? "OFF" : "ON");
3069
3070         if (disable_radio) {
3071                 iwl_scan_cancel(priv);
3072                 /* FIXME: This is a workaround for AP */
3073                 if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
3074                         spin_lock_irqsave(&priv->lock, flags);
3075                         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
3076                                     CSR_UCODE_SW_BIT_RFKILL);
3077                         spin_unlock_irqrestore(&priv->lock, flags);
3078                         iwl_send_card_state(priv, CARD_STATE_CMD_DISABLE, 0);
3079                         set_bit(STATUS_RF_KILL_SW, &priv->status);
3080                 }
3081                 return;
3082         }
3083
3084         spin_lock_irqsave(&priv->lock, flags);
3085         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
3086
3087         clear_bit(STATUS_RF_KILL_SW, &priv->status);
3088         spin_unlock_irqrestore(&priv->lock, flags);
3089
3090         /* wake up ucode */
3091         msleep(10);
3092
3093         spin_lock_irqsave(&priv->lock, flags);
3094         iwl_read32(priv, CSR_UCODE_DRV_GP1);
3095         if (!iwl_grab_restricted_access(priv))
3096                 iwl_release_restricted_access(priv);
3097         spin_unlock_irqrestore(&priv->lock, flags);
3098
3099         if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
3100                 IWL_DEBUG_RF_KILL("Can not turn radio back on - "
3101                                   "disabled by HW switch\n");
3102                 return;
3103         }
3104
3105         queue_work(priv->workqueue, &priv->restart);
3106         return;
3107 }
3108
3109 void iwl_set_decrypted_flag(struct iwl_priv *priv, struct sk_buff *skb,
3110                             u32 decrypt_res, struct ieee80211_rx_status *stats)
3111 {
3112         u16 fc =
3113             le16_to_cpu(((struct ieee80211_hdr *)skb->data)->frame_control);
3114
3115         if (priv->active_rxon.filter_flags & RXON_FILTER_DIS_DECRYPT_MSK)
3116                 return;
3117
3118         if (!(fc & IEEE80211_FCTL_PROTECTED))
3119                 return;
3120
3121         IWL_DEBUG_RX("decrypt_res:0x%x\n", decrypt_res);
3122         switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) {
3123         case RX_RES_STATUS_SEC_TYPE_TKIP:
3124                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
3125                     RX_RES_STATUS_BAD_ICV_MIC)
3126                         stats->flag |= RX_FLAG_MMIC_ERROR;
3127         case RX_RES_STATUS_SEC_TYPE_WEP:
3128         case RX_RES_STATUS_SEC_TYPE_CCMP:
3129                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
3130                     RX_RES_STATUS_DECRYPT_OK) {
3131                         IWL_DEBUG_RX("hw decrypt successfully!!!\n");
3132                         stats->flag |= RX_FLAG_DECRYPTED;
3133                 }
3134                 break;
3135
3136         default:
3137                 break;
3138         }
3139 }
3140
3141 void iwl_handle_data_packet_monitor(struct iwl_priv *priv,
3142                                     struct iwl_rx_mem_buffer *rxb,
3143                                     void *data, short len,
3144                                     struct ieee80211_rx_status *stats,
3145                                     u16 phy_flags)
3146 {
3147         struct iwl_rt_rx_hdr *iwl_rt;
3148
3149         /* First cache any information we need before we overwrite
3150          * the information provided in the skb from the hardware */
3151         s8 signal = stats->ssi;
3152         s8 noise = 0;
3153         int rate = stats->rate;
3154         u64 tsf = stats->mactime;
3155         __le16 phy_flags_hw = cpu_to_le16(phy_flags);
3156
3157         /* We received data from the HW, so stop the watchdog */
3158         if (len > IWL_RX_BUF_SIZE - sizeof(*iwl_rt)) {
3159                 IWL_DEBUG_DROP("Dropping too large packet in monitor\n");
3160                 return;
3161         }
3162
3163         /* copy the frame data to write after where the radiotap header goes */
3164         iwl_rt = (void *)rxb->skb->data;
3165         memmove(iwl_rt->payload, data, len);
3166
3167         iwl_rt->rt_hdr.it_version = PKTHDR_RADIOTAP_VERSION;
3168         iwl_rt->rt_hdr.it_pad = 0; /* always good to zero */
3169
3170         /* total header + data */
3171         iwl_rt->rt_hdr.it_len = cpu_to_le16(sizeof(*iwl_rt));
3172
3173         /* Set the size of the skb to the size of the frame */
3174         skb_put(rxb->skb, sizeof(*iwl_rt) + len);
3175
3176         /* Big bitfield of all the fields we provide in radiotap */
3177         iwl_rt->rt_hdr.it_present =
3178             cpu_to_le32((1 << IEEE80211_RADIOTAP_TSFT) |
3179                         (1 << IEEE80211_RADIOTAP_FLAGS) |
3180                         (1 << IEEE80211_RADIOTAP_RATE) |
3181                         (1 << IEEE80211_RADIOTAP_CHANNEL) |
3182                         (1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL) |
3183                         (1 << IEEE80211_RADIOTAP_DBM_ANTNOISE) |
3184                         (1 << IEEE80211_RADIOTAP_ANTENNA));
3185
3186         /* Zero the flags, we'll add to them as we go */
3187         iwl_rt->rt_flags = 0;
3188
3189         iwl_rt->rt_tsf = cpu_to_le64(tsf);
3190
3191         /* Convert to dBm */
3192         iwl_rt->rt_dbmsignal = signal;
3193         iwl_rt->rt_dbmnoise = noise;
3194
3195         /* Convert the channel frequency and set the flags */
3196         iwl_rt->rt_channelMHz = cpu_to_le16(stats->freq);
3197         if (!(phy_flags_hw & RX_RES_PHY_FLAGS_BAND_24_MSK))
3198                 iwl_rt->rt_chbitmask =
3199                     cpu_to_le16((IEEE80211_CHAN_OFDM | IEEE80211_CHAN_5GHZ));
3200         else if (phy_flags_hw & RX_RES_PHY_FLAGS_MOD_CCK_MSK)
3201                 iwl_rt->rt_chbitmask =
3202                     cpu_to_le16((IEEE80211_CHAN_CCK | IEEE80211_CHAN_2GHZ));
3203         else    /* 802.11g */
3204                 iwl_rt->rt_chbitmask =
3205                     cpu_to_le16((IEEE80211_CHAN_OFDM | IEEE80211_CHAN_2GHZ));
3206
3207         rate = iwl_rate_index_from_plcp(rate);
3208         if (rate == -1)
3209                 iwl_rt->rt_rate = 0;
3210         else
3211                 iwl_rt->rt_rate = iwl_rates[rate].ieee;
3212
3213         /* antenna number */
3214         iwl_rt->rt_antenna =
3215                 le16_to_cpu(phy_flags_hw & RX_RES_PHY_FLAGS_ANTENNA_MSK) >> 4;
3216
3217         /* set the preamble flag if we have it */
3218         if (phy_flags_hw & RX_RES_PHY_FLAGS_SHORT_PREAMBLE_MSK)
3219                 iwl_rt->rt_flags |= IEEE80211_RADIOTAP_F_SHORTPRE;
3220
3221         IWL_DEBUG_RX("Rx packet of %d bytes.\n", rxb->skb->len);
3222
3223         stats->flag |= RX_FLAG_RADIOTAP;
3224         ieee80211_rx_irqsafe(priv->hw, rxb->skb, stats);
3225         rxb->skb = NULL;
3226 }
3227
3228
3229 #define IWL_PACKET_RETRY_TIME HZ
3230
3231 int is_duplicate_packet(struct iwl_priv *priv, struct ieee80211_hdr *header)
3232 {
3233         u16 sc = le16_to_cpu(header->seq_ctrl);
3234         u16 seq = (sc & IEEE80211_SCTL_SEQ) >> 4;
3235         u16 frag = sc & IEEE80211_SCTL_FRAG;
3236         u16 *last_seq, *last_frag;
3237         unsigned long *last_time;
3238
3239         switch (priv->iw_mode) {
3240         case IEEE80211_IF_TYPE_IBSS:{
3241                 struct list_head *p;
3242                 struct iwl_ibss_seq *entry = NULL;
3243                 u8 *mac = header->addr2;
3244                 int index = mac[5] & (IWL_IBSS_MAC_HASH_SIZE - 1);
3245
3246                 __list_for_each(p, &priv->ibss_mac_hash[index]) {
3247                         entry =
3248                                 list_entry(p, struct iwl_ibss_seq, list);
3249                         if (!compare_ether_addr(entry->mac, mac))
3250                                 break;
3251                 }
3252                 if (p == &priv->ibss_mac_hash[index]) {
3253                         entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
3254                         if (!entry) {
3255                                 IWL_ERROR
3256                                         ("Cannot malloc new mac entry\n");
3257                                 return 0;
3258                         }
3259                         memcpy(entry->mac, mac, ETH_ALEN);
3260                         entry->seq_num = seq;
3261                         entry->frag_num = frag;
3262                         entry->packet_time = jiffies;
3263                         list_add(&entry->list,
3264                                  &priv->ibss_mac_hash[index]);
3265                         return 0;
3266                 }
3267                 last_seq = &entry->seq_num;
3268                 last_frag = &entry->frag_num;
3269                 last_time = &entry->packet_time;
3270                 break;
3271         }
3272         case IEEE80211_IF_TYPE_STA:
3273                 last_seq = &priv->last_seq_num;
3274                 last_frag = &priv->last_frag_num;
3275                 last_time = &priv->last_packet_time;
3276                 break;
3277         default:
3278                 return 0;
3279         }
3280         if ((*last_seq == seq) &&
3281             time_after(*last_time + IWL_PACKET_RETRY_TIME, jiffies)) {
3282                 if (*last_frag == frag)
3283                         goto drop;
3284                 if (*last_frag + 1 != frag)
3285                         /* out-of-order fragment */
3286                         goto drop;
3287         } else
3288                 *last_seq = seq;
3289
3290         *last_frag = frag;
3291         *last_time = jiffies;
3292         return 0;
3293
3294  drop:
3295         return 1;
3296 }
3297
3298 #ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
3299
3300 #include "iwl-spectrum.h"
3301
3302 #define BEACON_TIME_MASK_LOW    0x00FFFFFF
3303 #define BEACON_TIME_MASK_HIGH   0xFF000000
3304 #define TIME_UNIT               1024
3305
3306 /*
3307  * extended beacon time format
3308  * time in usec will be changed into a 32-bit value in 8:24 format
3309  * the high 1 byte is the beacon counts
3310  * the lower 3 bytes is the time in usec within one beacon interval
3311  */
3312
3313 static u32 iwl_usecs_to_beacons(u32 usec, u32 beacon_interval)
3314 {
3315         u32 quot;
3316         u32 rem;
3317         u32 interval = beacon_interval * 1024;
3318
3319         if (!interval || !usec)
3320                 return 0;
3321
3322         quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
3323         rem = (usec % interval) & BEACON_TIME_MASK_LOW;
3324
3325         return (quot << 24) + rem;
3326 }
3327
3328 /* base is usually what we get from ucode with each received frame,
3329  * the same as HW timer counter counting down
3330  */
3331
3332 static __le32 iwl_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
3333 {
3334         u32 base_low = base & BEACON_TIME_MASK_LOW;
3335         u32 addon_low = addon & BEACON_TIME_MASK_LOW;
3336         u32 interval = beacon_interval * TIME_UNIT;
3337         u32 res = (base & BEACON_TIME_MASK_HIGH) +
3338             (addon & BEACON_TIME_MASK_HIGH);
3339
3340         if (base_low > addon_low)
3341                 res += base_low - addon_low;
3342         else if (base_low < addon_low) {
3343                 res += interval + base_low - addon_low;
3344                 res += (1 << 24);
3345         } else
3346                 res += (1 << 24);
3347
3348         return cpu_to_le32(res);
3349 }
3350
3351 static int iwl_get_measurement(struct iwl_priv *priv,
3352                                struct ieee80211_measurement_params *params,
3353                                u8 type)
3354 {
3355         struct iwl_spectrum_cmd spectrum;
3356         struct iwl_rx_packet *res;
3357         struct iwl_host_cmd cmd = {
3358                 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
3359                 .data = (void *)&spectrum,
3360                 .meta.flags = CMD_WANT_SKB,
3361         };
3362         u32 add_time = le64_to_cpu(params->start_time);
3363         int rc;
3364         int spectrum_resp_status;
3365         int duration = le16_to_cpu(params->duration);
3366
3367         if (iwl_is_associated(priv))
3368                 add_time =
3369                     iwl_usecs_to_beacons(
3370                         le64_to_cpu(params->start_time) - priv->last_tsf,
3371                         le16_to_cpu(priv->rxon_timing.beacon_interval));
3372
3373         memset(&spectrum, 0, sizeof(spectrum));
3374
3375         spectrum.channel_count = cpu_to_le16(1);
3376         spectrum.flags =
3377             RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
3378         spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
3379         cmd.len = sizeof(spectrum);
3380         spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
3381
3382         if (iwl_is_associated(priv))
3383                 spectrum.start_time =
3384                     iwl_add_beacon_time(priv->last_beacon_time,
3385                                 add_time,
3386                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
3387         else
3388                 spectrum.start_time = 0;
3389
3390         spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
3391         spectrum.channels[0].channel = params->channel;
3392         spectrum.channels[0].type = type;
3393         if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
3394                 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
3395                     RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
3396
3397         rc = iwl_send_cmd_sync(priv, &cmd);
3398         if (rc)
3399                 return rc;
3400
3401         res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
3402         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
3403                 IWL_ERROR("Bad return from REPLY_RX_ON_ASSOC command\n");
3404                 rc = -EIO;
3405         }
3406
3407         spectrum_resp_status = le16_to_cpu(res->u.spectrum.status);
3408         switch (spectrum_resp_status) {
3409         case 0:         /* Command will be handled */
3410                 if (res->u.spectrum.id != 0xff) {
3411                         IWL_DEBUG_INFO
3412                             ("Replaced existing measurement: %d\n",
3413                              res->u.spectrum.id);
3414                         priv->measurement_status &= ~MEASUREMENT_READY;
3415                 }
3416                 priv->measurement_status |= MEASUREMENT_ACTIVE;
3417                 rc = 0;
3418                 break;
3419
3420         case 1:         /* Command will not be handled */
3421                 rc = -EAGAIN;
3422                 break;
3423         }
3424
3425         dev_kfree_skb_any(cmd.meta.u.skb);
3426
3427         return rc;
3428 }
3429 #endif
3430
3431 static void iwl_txstatus_to_ieee(struct iwl_priv *priv,
3432                                  struct iwl_tx_info *tx_sta)
3433 {
3434
3435         tx_sta->status.ack_signal = 0;
3436         tx_sta->status.excessive_retries = 0;
3437         tx_sta->status.queue_length = 0;
3438         tx_sta->status.queue_number = 0;
3439
3440         if (in_interrupt())
3441                 ieee80211_tx_status_irqsafe(priv->hw,
3442                                             tx_sta->skb[0], &(tx_sta->status));
3443         else
3444                 ieee80211_tx_status(priv->hw,
3445                                     tx_sta->skb[0], &(tx_sta->status));
3446
3447         tx_sta->skb[0] = NULL;
3448 }
3449
3450 /**
3451  * iwl_tx_queue_reclaim - Reclaim Tx queue entries no more used by NIC.
3452  *
3453  * When FW advances 'R' index, all entries between old and
3454  * new 'R' index need to be reclaimed. As result, some free space
3455  * forms. If there is enough free space (> low mark), wake Tx queue.
3456  */
3457 int iwl_tx_queue_reclaim(struct iwl_priv *priv, int txq_id, int index)
3458 {
3459         struct iwl_tx_queue *txq = &priv->txq[txq_id];
3460         struct iwl_queue *q = &txq->q;
3461         int nfreed = 0;
3462
3463         if ((index >= q->n_bd) || (x2_queue_used(q, index) == 0)) {
3464                 IWL_ERROR("Read index for DMA queue txq id (%d), index %d, "
3465                           "is out of range [0-%d] %d %d.\n", txq_id,
3466                           index, q->n_bd, q->first_empty, q->last_used);
3467                 return 0;
3468         }
3469
3470         for (index = iwl_queue_inc_wrap(index, q->n_bd);
3471                 q->last_used != index;
3472                 q->last_used = iwl_queue_inc_wrap(q->last_used, q->n_bd)) {
3473                 if (txq_id != IWL_CMD_QUEUE_NUM) {
3474                         iwl_txstatus_to_ieee(priv,
3475                                         &(txq->txb[txq->q.last_used]));
3476                         iwl_hw_txq_free_tfd(priv, txq);
3477                 } else if (nfreed > 1) {
3478                         IWL_ERROR("HCMD skipped: index (%d) %d %d\n", index,
3479                                         q->first_empty, q->last_used);
3480                         queue_work(priv->workqueue, &priv->restart);
3481                 }
3482                 nfreed++;
3483         }
3484
3485         if (iwl_queue_space(q) > q->low_mark && (txq_id >= 0) &&
3486                         (txq_id != IWL_CMD_QUEUE_NUM) &&
3487                         priv->mac80211_registered)
3488                 ieee80211_wake_queue(priv->hw, txq_id);
3489
3490
3491         return nfreed;
3492 }
3493
3494 static int iwl_is_tx_success(u32 status)
3495 {
3496         status &= TX_STATUS_MSK;
3497         return (status == TX_STATUS_SUCCESS)
3498             || (status == TX_STATUS_DIRECT_DONE);
3499 }
3500
3501 /******************************************************************************
3502  *
3503  * Generic RX handler implementations
3504  *
3505  ******************************************************************************/
3506 #ifdef CONFIG_IWLWIFI_HT
3507 #ifdef CONFIG_IWLWIFI_HT_AGG
3508
3509 static inline int iwl_get_ra_sta_id(struct iwl_priv *priv,
3510                                     struct ieee80211_hdr *hdr)
3511 {
3512         if (priv->iw_mode == IEEE80211_IF_TYPE_STA)
3513                 return IWL_AP_ID;
3514         else {
3515                 u8 *da = ieee80211_get_DA(hdr);
3516                 return iwl_hw_find_station(priv, da);
3517         }
3518 }
3519
3520 static struct ieee80211_hdr *iwl_tx_queue_get_hdr(
3521         struct iwl_priv *priv, int txq_id, int idx)
3522 {
3523         if (priv->txq[txq_id].txb[idx].skb[0])
3524                 return (struct ieee80211_hdr *)priv->txq[txq_id].
3525                                 txb[idx].skb[0]->data;
3526         return NULL;
3527 }
3528
3529 static inline u32 iwl_get_scd_ssn(struct iwl_tx_resp *tx_resp)
3530 {
3531         __le32 *scd_ssn = (__le32 *)((u32 *)&tx_resp->status +
3532                                 tx_resp->frame_count);
3533         return le32_to_cpu(*scd_ssn) & MAX_SN;
3534
3535 }
3536 static int iwl4965_tx_status_reply_tx(struct iwl_priv *priv,
3537                                       struct iwl_ht_agg *agg,
3538                                       struct iwl_tx_resp *tx_resp,
3539                                       u16 start_idx)
3540 {
3541         u32 status;
3542         __le32 *frame_status = &tx_resp->status;
3543         struct ieee80211_tx_status *tx_status = NULL;
3544         struct ieee80211_hdr *hdr = NULL;
3545         int i, sh;
3546         int txq_id, idx;
3547         u16 seq;
3548
3549         if (agg->wait_for_ba)
3550                 IWL_DEBUG_TX_REPLY("got tx repsons w/o back\n");
3551
3552         agg->frame_count = tx_resp->frame_count;
3553         agg->start_idx = start_idx;
3554         agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
3555         agg->bitmap0 = agg->bitmap1 = 0;
3556
3557         if (agg->frame_count == 1) {
3558                 struct iwl_tx_queue *txq ;
3559                 status = le32_to_cpu(frame_status[0]);
3560
3561                 txq_id = agg->txq_id;
3562                 txq = &priv->txq[txq_id];
3563                 /* FIXME: code repetition */
3564                 IWL_DEBUG_TX_REPLY("FrameCnt = %d, StartIdx=%d \n",
3565                                    agg->frame_count, agg->start_idx);
3566
3567                 tx_status = &(priv->txq[txq_id].txb[txq->q.last_used].status);
3568                 tx_status->retry_count = tx_resp->failure_frame;
3569                 tx_status->queue_number = status & 0xff;
3570                 tx_status->queue_length = tx_resp->bt_kill_count;
3571                 tx_status->queue_length |= tx_resp->failure_rts;
3572
3573                 tx_status->flags = iwl_is_tx_success(status)?
3574                         IEEE80211_TX_STATUS_ACK : 0;
3575                 tx_status->control.tx_rate =
3576                                 iwl_hw_get_rate_n_flags(tx_resp->rate_n_flags);
3577                 /* FIXME: code repetition end */
3578
3579                 IWL_DEBUG_TX_REPLY("1 Frame 0x%x failure :%d\n",
3580                                     status & 0xff, tx_resp->failure_frame);
3581                 IWL_DEBUG_TX_REPLY("Rate Info rate_n_flags=%x\n",
3582                                 iwl_hw_get_rate_n_flags(tx_resp->rate_n_flags));
3583
3584                 agg->wait_for_ba = 0;
3585         } else {
3586                 u64 bitmap = 0;
3587                 int start = agg->start_idx;
3588
3589                 for (i = 0; i < agg->frame_count; i++) {
3590                         u16 sc;
3591                         status = le32_to_cpu(frame_status[i]);
3592                         seq  = status >> 16;
3593                         idx = SEQ_TO_INDEX(seq);
3594                         txq_id = SEQ_TO_QUEUE(seq);
3595
3596                         if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
3597                                       AGG_TX_STATE_ABORT_MSK))
3598                                 continue;
3599
3600                         IWL_DEBUG_TX_REPLY("FrameCnt = %d, txq_id=%d idx=%d\n",
3601                                            agg->frame_count, txq_id, idx);
3602
3603                         hdr = iwl_tx_queue_get_hdr(priv, txq_id, idx);
3604
3605                         sc = le16_to_cpu(hdr->seq_ctrl);
3606                         if (idx != (SEQ_TO_SN(sc) & 0xff)) {
3607                                 IWL_ERROR("BUG_ON idx doesn't match seq control"
3608                                           " idx=%d, seq_idx=%d, seq=%d\n",
3609                                           idx, SEQ_TO_SN(sc),
3610                                           hdr->seq_ctrl);
3611                                 return -1;
3612                         }
3613
3614                         IWL_DEBUG_TX_REPLY("AGG Frame i=%d idx %d seq=%d\n",
3615                                            i, idx, SEQ_TO_SN(sc));
3616
3617                         sh = idx - start;
3618                         if (sh > 64) {
3619                                 sh = (start - idx) + 0xff;
3620                                 bitmap = bitmap << sh;
3621                                 sh = 0;
3622                                 start = idx;
3623                         } else if (sh < -64)
3624                                 sh  = 0xff - (start - idx);
3625                         else if (sh < 0) {
3626                                 sh = start - idx;
3627                                 start = idx;
3628                                 bitmap = bitmap << sh;
3629                                 sh = 0;
3630                         }
3631                         bitmap |= (1 << sh);
3632                         IWL_DEBUG_TX_REPLY("start=%d bitmap=0x%x\n",
3633                                            start, (u32)(bitmap & 0xFFFFFFFF));
3634                 }
3635
3636                 agg->bitmap0 = bitmap & 0xFFFFFFFF;
3637                 agg->bitmap1 = bitmap >> 32;
3638                 agg->start_idx = start;
3639                 agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
3640                 IWL_DEBUG_TX_REPLY("Frames %d start_idx=%d bitmap=0x%x\n",
3641                                    agg->frame_count, agg->start_idx,
3642                                    agg->bitmap0);
3643
3644                 if (bitmap)
3645                         agg->wait_for_ba = 1;
3646         }
3647         return 0;
3648 }
3649 #endif
3650 #endif
3651
3652 static void iwl_rx_reply_tx(struct iwl_priv *priv,
3653                             struct iwl_rx_mem_buffer *rxb)
3654 {
3655         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3656         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3657         int txq_id = SEQ_TO_QUEUE(sequence);
3658         int index = SEQ_TO_INDEX(sequence);
3659         struct iwl_tx_queue *txq = &priv->txq[txq_id];
3660         struct ieee80211_tx_status *tx_status;
3661         struct iwl_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
3662         u32  status = le32_to_cpu(tx_resp->status);
3663 #ifdef CONFIG_IWLWIFI_HT
3664 #ifdef CONFIG_IWLWIFI_HT_AGG
3665         int tid, sta_id;
3666 #endif
3667 #endif
3668
3669         if ((index >= txq->q.n_bd) || (x2_queue_used(&txq->q, index) == 0)) {
3670                 IWL_ERROR("Read index for DMA queue txq_id (%d) index %d "
3671                           "is out of range [0-%d] %d %d\n", txq_id,
3672                           index, txq->q.n_bd, txq->q.first_empty,
3673                           txq->q.last_used);
3674                 return;
3675         }
3676
3677 #ifdef CONFIG_IWLWIFI_HT
3678 #ifdef CONFIG_IWLWIFI_HT_AGG
3679         if (txq->sched_retry) {
3680                 const u32 scd_ssn = iwl_get_scd_ssn(tx_resp);
3681                 struct ieee80211_hdr *hdr =
3682                         iwl_tx_queue_get_hdr(priv, txq_id, index);
3683                 struct iwl_ht_agg *agg = NULL;
3684                 __le16 *qc = ieee80211_get_qos_ctrl(hdr);
3685
3686                 if (qc == NULL) {
3687                         IWL_ERROR("BUG_ON qc is null!!!!\n");
3688                         return;
3689                 }
3690
3691                 tid = le16_to_cpu(*qc) & 0xf;
3692
3693                 sta_id = iwl_get_ra_sta_id(priv, hdr);
3694                 if (unlikely(sta_id == IWL_INVALID_STATION)) {
3695                         IWL_ERROR("Station not known for\n");
3696                         return;
3697                 }
3698
3699                 agg = &priv->stations[sta_id].tid[tid].agg;
3700
3701                 iwl4965_tx_status_reply_tx(priv, agg, tx_resp, index);
3702
3703                 if ((tx_resp->frame_count == 1) &&
3704                     !iwl_is_tx_success(status)) {
3705                         /* TODO: send BAR */
3706                 }
3707
3708                 if ((txq->q.last_used != (scd_ssn & 0xff))) {
3709                         index = iwl_queue_dec_wrap(scd_ssn & 0xff, txq->q.n_bd);
3710                         IWL_DEBUG_TX_REPLY("Retry scheduler reclaim scd_ssn "
3711                                            "%d index %d\n", scd_ssn , index);
3712                         iwl_tx_queue_reclaim(priv, txq_id, index);
3713                 }
3714         } else {
3715 #endif /* CONFIG_IWLWIFI_HT_AGG */
3716 #endif /* CONFIG_IWLWIFI_HT */
3717         tx_status = &(txq->txb[txq->q.last_used].status);
3718
3719         tx_status->retry_count = tx_resp->failure_frame;
3720         tx_status->queue_number = status;
3721         tx_status->queue_length = tx_resp->bt_kill_count;
3722         tx_status->queue_length |= tx_resp->failure_rts;
3723
3724         tx_status->flags =
3725             iwl_is_tx_success(status) ? IEEE80211_TX_STATUS_ACK : 0;
3726
3727         tx_status->control.tx_rate =
3728                 iwl_hw_get_rate_n_flags(tx_resp->rate_n_flags);
3729
3730         IWL_DEBUG_TX("Tx queue %d Status %s (0x%08x) rate_n_flags 0x%x "
3731                      "retries %d\n", txq_id, iwl_get_tx_fail_reason(status),
3732                      status, le32_to_cpu(tx_resp->rate_n_flags),
3733                      tx_resp->failure_frame);
3734
3735         IWL_DEBUG_TX_REPLY("Tx queue reclaim %d\n", index);
3736         if (index != -1)
3737                 iwl_tx_queue_reclaim(priv, txq_id, index);
3738 #ifdef CONFIG_IWLWIFI_HT
3739 #ifdef CONFIG_IWLWIFI_HT_AGG
3740         }
3741 #endif /* CONFIG_IWLWIFI_HT_AGG */
3742 #endif /* CONFIG_IWLWIFI_HT */
3743
3744         if (iwl_check_bits(status, TX_ABORT_REQUIRED_MSK))
3745                 IWL_ERROR("TODO:  Implement Tx ABORT REQUIRED!!!\n");
3746 }
3747
3748
3749 static void iwl_rx_reply_alive(struct iwl_priv *priv,
3750                                struct iwl_rx_mem_buffer *rxb)
3751 {
3752         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3753         struct iwl_alive_resp *palive;
3754         struct delayed_work *pwork;
3755
3756         palive = &pkt->u.alive_frame;
3757
3758         IWL_DEBUG_INFO("Alive ucode status 0x%08X revision "
3759                        "0x%01X 0x%01X\n",
3760                        palive->is_valid, palive->ver_type,
3761                        palive->ver_subtype);
3762
3763         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
3764                 IWL_DEBUG_INFO("Initialization Alive received.\n");
3765                 memcpy(&priv->card_alive_init,
3766                        &pkt->u.alive_frame,
3767                        sizeof(struct iwl_init_alive_resp));
3768                 pwork = &priv->init_alive_start;
3769         } else {
3770                 IWL_DEBUG_INFO("Runtime Alive received.\n");
3771                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
3772                        sizeof(struct iwl_alive_resp));
3773                 pwork = &priv->alive_start;
3774         }
3775
3776         /* We delay the ALIVE response by 5ms to
3777          * give the HW RF Kill time to activate... */
3778         if (palive->is_valid == UCODE_VALID_OK)
3779                 queue_delayed_work(priv->workqueue, pwork,
3780                                    msecs_to_jiffies(5));
3781         else
3782                 IWL_WARNING("uCode did not respond OK.\n");
3783 }
3784
3785 static void iwl_rx_reply_add_sta(struct iwl_priv *priv,
3786                                  struct iwl_rx_mem_buffer *rxb)
3787 {
3788         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3789
3790         IWL_DEBUG_RX("Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
3791         return;
3792 }
3793
3794 static void iwl_rx_reply_error(struct iwl_priv *priv,
3795                                struct iwl_rx_mem_buffer *rxb)
3796 {
3797         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3798
3799         IWL_ERROR("Error Reply type 0x%08X cmd %s (0x%02X) "
3800                 "seq 0x%04X ser 0x%08X\n",
3801                 le32_to_cpu(pkt->u.err_resp.error_type),
3802                 get_cmd_string(pkt->u.err_resp.cmd_id),
3803                 pkt->u.err_resp.cmd_id,
3804                 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
3805                 le32_to_cpu(pkt->u.err_resp.error_info));
3806 }
3807
3808 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
3809
3810 static void iwl_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
3811 {
3812         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3813         struct iwl_rxon_cmd *rxon = (void *)&priv->active_rxon;
3814         struct iwl_csa_notification *csa = &(pkt->u.csa_notif);
3815         IWL_DEBUG_11H("CSA notif: channel %d, status %d\n",
3816                       le16_to_cpu(csa->channel), le32_to_cpu(csa->status));
3817         rxon->channel = csa->channel;
3818         priv->staging_rxon.channel = csa->channel;
3819 }
3820
3821 static void iwl_rx_spectrum_measure_notif(struct iwl_priv *priv,
3822                                           struct iwl_rx_mem_buffer *rxb)
3823 {
3824 #ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
3825         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3826         struct iwl_spectrum_notification *report = &(pkt->u.spectrum_notif);
3827
3828         if (!report->state) {
3829                 IWL_DEBUG(IWL_DL_11H | IWL_DL_INFO,
3830                           "Spectrum Measure Notification: Start\n");
3831                 return;
3832         }
3833
3834         memcpy(&priv->measure_report, report, sizeof(*report));
3835         priv->measurement_status |= MEASUREMENT_READY;
3836 #endif
3837 }
3838
3839 static void iwl_rx_pm_sleep_notif(struct iwl_priv *priv,
3840                                   struct iwl_rx_mem_buffer *rxb)
3841 {
3842 #ifdef CONFIG_IWLWIFI_DEBUG
3843         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3844         struct iwl_sleep_notification *sleep = &(pkt->u.sleep_notif);
3845         IWL_DEBUG_RX("sleep mode: %d, src: %d\n",
3846                      sleep->pm_sleep_mode, sleep->pm_wakeup_src);
3847 #endif
3848 }
3849
3850 static void iwl_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
3851                                              struct iwl_rx_mem_buffer *rxb)
3852 {
3853         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3854         IWL_DEBUG_RADIO("Dumping %d bytes of unhandled "
3855                         "notification for %s:\n",
3856                         le32_to_cpu(pkt->len), get_cmd_string(pkt->hdr.cmd));
3857         iwl_print_hex_dump(IWL_DL_RADIO, pkt->u.raw, le32_to_cpu(pkt->len));
3858 }
3859
3860 static void iwl_bg_beacon_update(struct work_struct *work)
3861 {
3862         struct iwl_priv *priv =
3863                 container_of(work, struct iwl_priv, beacon_update);
3864         struct sk_buff *beacon;
3865
3866         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
3867         beacon = ieee80211_beacon_get(priv->hw, priv->interface_id, NULL);
3868
3869         if (!beacon) {
3870                 IWL_ERROR("update beacon failed\n");
3871                 return;
3872         }
3873
3874         mutex_lock(&priv->mutex);
3875         /* new beacon skb is allocated every time; dispose previous.*/
3876         if (priv->ibss_beacon)
3877                 dev_kfree_skb(priv->ibss_beacon);
3878
3879         priv->ibss_beacon = beacon;
3880         mutex_unlock(&priv->mutex);
3881
3882         iwl_send_beacon_cmd(priv);
3883 }
3884
3885 static void iwl_rx_beacon_notif(struct iwl_priv *priv,
3886                                 struct iwl_rx_mem_buffer *rxb)
3887 {
3888 #ifdef CONFIG_IWLWIFI_DEBUG
3889         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3890         struct iwl_beacon_notif *beacon = &(pkt->u.beacon_status);
3891         u8 rate = iwl_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
3892
3893         IWL_DEBUG_RX("beacon status %x retries %d iss %d "
3894                 "tsf %d %d rate %d\n",
3895                 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
3896                 beacon->beacon_notify_hdr.failure_frame,
3897                 le32_to_cpu(beacon->ibss_mgr_status),
3898                 le32_to_cpu(beacon->high_tsf),
3899                 le32_to_cpu(beacon->low_tsf), rate);
3900 #endif
3901
3902         if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
3903             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
3904                 queue_work(priv->workqueue, &priv->beacon_update);
3905 }
3906
3907 /* Service response to REPLY_SCAN_CMD (0x80) */
3908 static void iwl_rx_reply_scan(struct iwl_priv *priv,
3909                               struct iwl_rx_mem_buffer *rxb)
3910 {
3911 #ifdef CONFIG_IWLWIFI_DEBUG
3912         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3913         struct iwl_scanreq_notification *notif =
3914             (struct iwl_scanreq_notification *)pkt->u.raw;
3915
3916         IWL_DEBUG_RX("Scan request status = 0x%x\n", notif->status);
3917 #endif
3918 }
3919
3920 /* Service SCAN_START_NOTIFICATION (0x82) */
3921 static void iwl_rx_scan_start_notif(struct iwl_priv *priv,
3922                                     struct iwl_rx_mem_buffer *rxb)
3923 {
3924         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3925         struct iwl_scanstart_notification *notif =
3926             (struct iwl_scanstart_notification *)pkt->u.raw;
3927         priv->scan_start_tsf = le32_to_cpu(notif->tsf_low);
3928         IWL_DEBUG_SCAN("Scan start: "
3929                        "%d [802.11%s] "
3930                        "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n",
3931                        notif->channel,
3932                        notif->band ? "bg" : "a",
3933                        notif->tsf_high,
3934                        notif->tsf_low, notif->status, notif->beacon_timer);
3935 }
3936
3937 /* Service SCAN_RESULTS_NOTIFICATION (0x83) */
3938 static void iwl_rx_scan_results_notif(struct iwl_priv *priv,
3939                                       struct iwl_rx_mem_buffer *rxb)
3940 {
3941         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3942         struct iwl_scanresults_notification *notif =
3943             (struct iwl_scanresults_notification *)pkt->u.raw;
3944
3945         IWL_DEBUG_SCAN("Scan ch.res: "
3946                        "%d [802.11%s] "
3947                        "(TSF: 0x%08X:%08X) - %d "
3948                        "elapsed=%lu usec (%dms since last)\n",
3949                        notif->channel,
3950                        notif->band ? "bg" : "a",
3951                        le32_to_cpu(notif->tsf_high),
3952                        le32_to_cpu(notif->tsf_low),
3953                        le32_to_cpu(notif->statistics[0]),
3954                        le32_to_cpu(notif->tsf_low) - priv->scan_start_tsf,
3955                        jiffies_to_msecs(elapsed_jiffies
3956                                         (priv->last_scan_jiffies, jiffies)));
3957
3958         priv->last_scan_jiffies = jiffies;
3959 }
3960
3961 /* Service SCAN_COMPLETE_NOTIFICATION (0x84) */
3962 static void iwl_rx_scan_complete_notif(struct iwl_priv *priv,
3963                                        struct iwl_rx_mem_buffer *rxb)
3964 {
3965         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
3966         struct iwl_scancomplete_notification *scan_notif = (void *)pkt->u.raw;
3967
3968         IWL_DEBUG_SCAN("Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n",
3969                        scan_notif->scanned_channels,
3970                        scan_notif->tsf_low,
3971                        scan_notif->tsf_high, scan_notif->status);
3972
3973         /* The HW is no longer scanning */
3974         clear_bit(STATUS_SCAN_HW, &priv->status);
3975
3976         /* The scan completion notification came in, so kill that timer... */
3977         cancel_delayed_work(&priv->scan_check);
3978
3979         IWL_DEBUG_INFO("Scan pass on %sGHz took %dms\n",
3980                        (priv->scan_bands == 2) ? "2.4" : "5.2",
3981                        jiffies_to_msecs(elapsed_jiffies
3982                                         (priv->scan_pass_start, jiffies)));
3983
3984         /* Remove this scanned band from the list
3985          * of pending bands to scan */
3986         priv->scan_bands--;
3987
3988         /* If a request to abort was given, or the scan did not succeed
3989          * then we reset the scan state machine and terminate,
3990          * re-queuing another scan if one has been requested */
3991         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
3992                 IWL_DEBUG_INFO("Aborted scan completed.\n");
3993                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
3994         } else {
3995                 /* If there are more bands on this scan pass reschedule */
3996                 if (priv->scan_bands > 0)
3997                         goto reschedule;
3998         }
3999
4000         priv->last_scan_jiffies = jiffies;
4001         IWL_DEBUG_INFO("Setting scan to off\n");
4002
4003         clear_bit(STATUS_SCANNING, &priv->status);
4004
4005         IWL_DEBUG_INFO("Scan took %dms\n",
4006                 jiffies_to_msecs(elapsed_jiffies(priv->scan_start, jiffies)));
4007
4008         queue_work(priv->workqueue, &priv->scan_completed);
4009
4010         return;
4011
4012 reschedule:
4013         priv->scan_pass_start = jiffies;
4014         queue_work(priv->workqueue, &priv->request_scan);
4015 }
4016
4017 /* Handle notification from uCode that card's power state is changing
4018  * due to software, hardware, or critical temperature RFKILL */
4019 static void iwl_rx_card_state_notif(struct iwl_priv *priv,
4020                                     struct iwl_rx_mem_buffer *rxb)
4021 {
4022         struct iwl_rx_packet *pkt = (void *)rxb->skb->data;
4023         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
4024         unsigned long status = priv->status;
4025
4026         IWL_DEBUG_RF_KILL("Card state received: HW:%s SW:%s\n",
4027                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
4028                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
4029
4030         if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED |
4031                      RF_CARD_DISABLED)) {
4032
4033                 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
4034                             CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
4035
4036                 if (!iwl_grab_restricted_access(priv)) {
4037                         iwl_write_restricted(
4038                                 priv, HBUS_TARG_MBX_C,
4039                                 HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
4040
4041                         iwl_release_restricted_access(priv);
4042                 }
4043
4044                 if (!(flags & RXON_CARD_DISABLED)) {
4045                         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
4046                                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
4047                         if (!iwl_grab_restricted_access(priv)) {
4048                                 iwl_write_restricted(
4049                                         priv, HBUS_TARG_MBX_C,
4050                                         HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
4051
4052                                 iwl_release_restricted_access(priv);
4053                         }
4054                 }
4055
4056                 if (flags & RF_CARD_DISABLED) {
4057                         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
4058                                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
4059                         iwl_read32(priv, CSR_UCODE_DRV_GP1);
4060                         if (!iwl_grab_restricted_access(priv))
4061                                 iwl_release_restricted_access(priv);
4062                 }
4063         }
4064
4065         if (flags & HW_CARD_DISABLED)
4066                 set_bit(STATUS_RF_KILL_HW, &priv->status);
4067         else
4068                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
4069
4070
4071         if (flags & SW_CARD_DISABLED)
4072                 set_bit(STATUS_RF_KILL_SW, &priv->status);
4073         else
4074                 clear_bit(STATUS_RF_KILL_SW, &priv->status);
4075
4076         if (!(flags & RXON_CARD_DISABLED))
4077                 iwl_scan_cancel(priv);
4078
4079         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
4080              test_bit(STATUS_RF_KILL_HW, &priv->status)) ||
4081             (test_bit(STATUS_RF_KILL_SW, &status) !=
4082              test_bit(STATUS_RF_KILL_SW, &priv->status)))
4083                 queue_work(priv->workqueue, &priv->rf_kill);
4084         else
4085                 wake_up_interruptible(&priv->wait_command_queue);
4086 }
4087
4088 /**
4089  * iwl_setup_rx_handlers - Initialize Rx handler callbacks
4090  *
4091  * Setup the RX handlers for each of the reply types sent from the uCode
4092  * to the host.
4093  *
4094  * This function chains into the hardware specific files for them to setup
4095  * any hardware specific handlers as well.
4096  */
4097 static void iwl_setup_rx_handlers(struct iwl_priv *priv)
4098 {
4099         priv->rx_handlers[REPLY_ALIVE] = iwl_rx_reply_alive;
4100         priv->rx_handlers[REPLY_ADD_STA] = iwl_rx_reply_add_sta;
4101         priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error;
4102         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
4103         priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
4104             iwl_rx_spectrum_measure_notif;
4105         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif;
4106         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
4107             iwl_rx_pm_debug_statistics_notif;
4108         priv->rx_handlers[BEACON_NOTIFICATION] = iwl_rx_beacon_notif;
4109
4110         /* NOTE:  iwl_rx_statistics is different based on whether
4111          * the build is for the 3945 or the 4965.  See the
4112          * corresponding implementation in iwl-XXXX.c
4113          *
4114          * The same handler is used for both the REPLY to a
4115          * discrete statistics request from the host as well as
4116          * for the periodic statistics notification from the uCode
4117          */
4118         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl_hw_rx_statistics;
4119         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl_hw_rx_statistics;
4120
4121         priv->rx_handlers[REPLY_SCAN_CMD] = iwl_rx_reply_scan;
4122         priv->rx_handlers[SCAN_START_NOTIFICATION] = iwl_rx_scan_start_notif;
4123         priv->rx_handlers[SCAN_RESULTS_NOTIFICATION] =
4124             iwl_rx_scan_results_notif;
4125         priv->rx_handlers[SCAN_COMPLETE_NOTIFICATION] =
4126             iwl_rx_scan_complete_notif;
4127         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl_rx_card_state_notif;
4128         priv->rx_handlers[REPLY_TX] = iwl_rx_reply_tx;
4129
4130         /* Setup hardware specific Rx handlers */
4131         iwl_hw_rx_handler_setup(priv);
4132 }
4133
4134 /**
4135  * iwl_tx_cmd_complete - Pull unused buffers off the queue and reclaim them
4136  * @rxb: Rx buffer to reclaim
4137  *
4138  * If an Rx buffer has an async callback associated with it the callback
4139  * will be executed.  The attached skb (if present) will only be freed
4140  * if the callback returns 1
4141  */
4142 static void iwl_tx_cmd_complete(struct iwl_priv *priv,
4143                                 struct iwl_rx_mem_buffer *rxb)
4144 {
4145         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
4146         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
4147         int txq_id = SEQ_TO_QUEUE(sequence);
4148         int index = SEQ_TO_INDEX(sequence);
4149         int huge = sequence & SEQ_HUGE_FRAME;
4150         int cmd_index;
4151         struct iwl_cmd *cmd;
4152
4153         /* If a Tx command is being handled and it isn't in the actual
4154          * command queue then there a command routing bug has been introduced
4155          * in the queue management code. */
4156         if (txq_id != IWL_CMD_QUEUE_NUM)
4157                 IWL_ERROR("Error wrong command queue %d command id 0x%X\n",
4158                           txq_id, pkt->hdr.cmd);
4159         BUG_ON(txq_id != IWL_CMD_QUEUE_NUM);
4160
4161         cmd_index = get_cmd_index(&priv->txq[IWL_CMD_QUEUE_NUM].q, index, huge);
4162         cmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_index];
4163
4164         /* Input error checking is done when commands are added to queue. */
4165         if (cmd->meta.flags & CMD_WANT_SKB) {
4166                 cmd->meta.source->u.skb = rxb->skb;
4167                 rxb->skb = NULL;
4168         } else if (cmd->meta.u.callback &&
4169                    !cmd->meta.u.callback(priv, cmd, rxb->skb))
4170                 rxb->skb = NULL;
4171
4172         iwl_tx_queue_reclaim(priv, txq_id, index);
4173
4174         if (!(cmd->meta.flags & CMD_ASYNC)) {
4175                 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
4176                 wake_up_interruptible(&priv->wait_command_queue);
4177         }
4178 }
4179
4180 /************************** RX-FUNCTIONS ****************************/
4181 /*
4182  * Rx theory of operation
4183  *
4184  * The host allocates 32 DMA target addresses and passes the host address
4185  * to the firmware at register IWL_RFDS_TABLE_LOWER + N * RFD_SIZE where N is
4186  * 0 to 31
4187  *
4188  * Rx Queue Indexes
4189  * The host/firmware share two index registers for managing the Rx buffers.
4190  *
4191  * The READ index maps to the first position that the firmware may be writing
4192  * to -- the driver can read up to (but not including) this position and get
4193  * good data.
4194  * The READ index is managed by the firmware once the card is enabled.
4195  *
4196  * The WRITE index maps to the last position the driver has read from -- the
4197  * position preceding WRITE is the last slot the firmware can place a packet.
4198  *
4199  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
4200  * WRITE = READ.
4201  *
4202  * During initialization the host sets up the READ queue position to the first
4203  * INDEX position, and WRITE to the last (READ - 1 wrapped)
4204  *
4205  * When the firmware places a packet in a buffer it will advance the READ index
4206  * and fire the RX interrupt.  The driver can then query the READ index and
4207  * process as many packets as possible, moving the WRITE index forward as it
4208  * resets the Rx queue buffers with new memory.
4209  *
4210  * The management in the driver is as follows:
4211  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
4212  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
4213  *   to replensish the iwl->rxq->rx_free.
4214  * + In iwl_rx_replenish (scheduled) if 'processed' != 'read' then the
4215  *   iwl->rxq is replenished and the READ INDEX is updated (updating the
4216  *   'processed' and 'read' driver indexes as well)
4217  * + A received packet is processed and handed to the kernel network stack,
4218  *   detached from the iwl->rxq.  The driver 'processed' index is updated.
4219  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
4220  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
4221  *   INDEX is not incremented and iwl->status(RX_STALLED) is set.  If there
4222  *   were enough free buffers and RX_STALLED is set it is cleared.
4223  *
4224  *
4225  * Driver sequence:
4226  *
4227  * iwl_rx_queue_alloc()       Allocates rx_free
4228  * iwl_rx_replenish()         Replenishes rx_free list from rx_used, and calls
4229  *                            iwl_rx_queue_restock
4230  * iwl_rx_queue_restock()     Moves available buffers from rx_free into Rx
4231  *                            queue, updates firmware pointers, and updates
4232  *                            the WRITE index.  If insufficient rx_free buffers
4233  *                            are available, schedules iwl_rx_replenish
4234  *
4235  * -- enable interrupts --
4236  * ISR - iwl_rx()             Detach iwl_rx_mem_buffers from pool up to the
4237  *                            READ INDEX, detaching the SKB from the pool.
4238  *                            Moves the packet buffer from queue to rx_used.
4239  *                            Calls iwl_rx_queue_restock to refill any empty
4240  *                            slots.
4241  * ...
4242  *
4243  */
4244
4245 /**
4246  * iwl_rx_queue_space - Return number of free slots available in queue.
4247  */
4248 static int iwl_rx_queue_space(const struct iwl_rx_queue *q)
4249 {
4250         int s = q->read - q->write;
4251         if (s <= 0)
4252                 s += RX_QUEUE_SIZE;
4253         /* keep some buffer to not confuse full and empty queue */
4254         s -= 2;
4255         if (s < 0)
4256                 s = 0;
4257         return s;
4258 }
4259
4260 /**
4261  * iwl_rx_queue_update_write_ptr - Update the write pointer for the RX queue
4262  *
4263  * NOTE: This function has 3945 and 4965 specific code sections
4264  * but is declared in base due to the majority of the
4265  * implementation being the same (only a numeric constant is
4266  * different)
4267  *
4268  */
4269 int iwl_rx_queue_update_write_ptr(struct iwl_priv *priv, struct iwl_rx_queue *q)
4270 {
4271         u32 reg = 0;
4272         int rc = 0;
4273         unsigned long flags;
4274
4275         spin_lock_irqsave(&q->lock, flags);
4276
4277         if (q->need_update == 0)
4278                 goto exit_unlock;
4279
4280         if (test_bit(STATUS_POWER_PMI, &priv->status)) {
4281                 reg = iwl_read32(priv, CSR_UCODE_DRV_GP1);
4282
4283                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
4284                         iwl_set_bit(priv, CSR_GP_CNTRL,
4285                                     CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
4286                         goto exit_unlock;
4287                 }
4288
4289                 rc = iwl_grab_restricted_access(priv);
4290                 if (rc)
4291                         goto exit_unlock;
4292
4293                 iwl_write_restricted(priv, FH_RSCSR_CHNL0_WPTR,
4294                                      q->write & ~0x7);
4295                 iwl_release_restricted_access(priv);
4296         } else
4297                 iwl_write32(priv, FH_RSCSR_CHNL0_WPTR, q->write & ~0x7);
4298
4299
4300         q->need_update = 0;
4301
4302  exit_unlock:
4303         spin_unlock_irqrestore(&q->lock, flags);
4304         return rc;
4305 }
4306
4307 /**
4308  * iwl_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer pointer.
4309  *
4310  * NOTE: This function has 3945 and 4965 specific code paths in it.
4311  */
4312 static inline __le32 iwl_dma_addr2rbd_ptr(struct iwl_priv *priv,
4313                                           dma_addr_t dma_addr)
4314 {
4315         return cpu_to_le32((u32)(dma_addr >> 8));
4316 }
4317
4318
4319 /**
4320  * iwl_rx_queue_restock - refill RX queue from pre-allocated pool
4321  *
4322  * If there are slots in the RX queue that  need to be restocked,
4323  * and we have free pre-allocated buffers, fill the ranks as much
4324  * as we can pulling from rx_free.
4325  *
4326  * This moves the 'write' index forward to catch up with 'processed', and
4327  * also updates the memory address in the firmware to reference the new
4328  * target buffer.
4329  */
4330 int iwl_rx_queue_restock(struct iwl_priv *priv)
4331 {
4332         struct iwl_rx_queue *rxq = &priv->rxq;
4333         struct list_head *element;
4334         struct iwl_rx_mem_buffer *rxb;
4335         unsigned long flags;
4336         int write, rc;
4337
4338         spin_lock_irqsave(&rxq->lock, flags);
4339         write = rxq->write & ~0x7;
4340         while ((iwl_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
4341                 element = rxq->rx_free.next;
4342                 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
4343                 list_del(element);
4344                 rxq->bd[rxq->write] = iwl_dma_addr2rbd_ptr(priv, rxb->dma_addr);
4345                 rxq->queue[rxq->write] = rxb;
4346                 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
4347                 rxq->free_count--;
4348         }
4349         spin_unlock_irqrestore(&rxq->lock, flags);
4350         /* If the pre-allocated buffer pool is dropping low, schedule to
4351          * refill it */
4352         if (rxq->free_count <= RX_LOW_WATERMARK)
4353                 queue_work(priv->workqueue, &priv->rx_replenish);
4354
4355
4356         /* If we've added more space for the firmware to place data, tell it */
4357         if ((write != (rxq->write & ~0x7))
4358             || (abs(rxq->write - rxq->read) > 7)) {
4359                 spin_lock_irqsave(&rxq->lock, flags);
4360                 rxq->need_update = 1;
4361                 spin_unlock_irqrestore(&rxq->lock, flags);
4362                 rc = iwl_rx_queue_update_write_ptr(priv, rxq);
4363                 if (rc)
4364                         return rc;
4365         }
4366
4367         return 0;
4368 }
4369
4370 /**
4371  * iwl_rx_replensih - Move all used packet from rx_used to rx_free
4372  *
4373  * When moving to rx_free an SKB is allocated for the slot.
4374  *
4375  * Also restock the Rx queue via iwl_rx_queue_restock.
4376  * This is called as a scheduled work item (except for during intialization)
4377  */
4378 void iwl_rx_replenish(void *data)
4379 {
4380         struct iwl_priv *priv = data;
4381         struct iwl_rx_queue *rxq = &priv->rxq;
4382         struct list_head *element;
4383         struct iwl_rx_mem_buffer *rxb;
4384         unsigned long flags;
4385         spin_lock_irqsave(&rxq->lock, flags);
4386         while (!list_empty(&rxq->rx_used)) {
4387                 element = rxq->rx_used.next;
4388                 rxb = list_entry(element, struct iwl_rx_mem_buffer, list);
4389                 rxb->skb =
4390                     alloc_skb(IWL_RX_BUF_SIZE, __GFP_NOWARN | GFP_ATOMIC);
4391                 if (!rxb->skb) {
4392                         if (net_ratelimit())
4393                                 printk(KERN_CRIT DRV_NAME
4394                                        ": Can not allocate SKB buffers\n");
4395                         /* We don't reschedule replenish work here -- we will
4396                          * call the restock method and if it still needs
4397                          * more buffers it will schedule replenish */
4398                         break;
4399                 }
4400                 priv->alloc_rxb_skb++;
4401                 list_del(element);
4402                 rxb->dma_addr =
4403                     pci_map_single(priv->pci_dev, rxb->skb->data,
4404                                    IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
4405                 list_add_tail(&rxb->list, &rxq->rx_free);
4406                 rxq->free_count++;
4407         }
4408         spin_unlock_irqrestore(&rxq->lock, flags);
4409
4410         spin_lock_irqsave(&priv->lock, flags);
4411         iwl_rx_queue_restock(priv);
4412         spin_unlock_irqrestore(&priv->lock, flags);
4413 }
4414
4415 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
4416  * If an SKB has been detached, the POOL needs to have it's SKB set to NULL
4417  * This free routine walks the list of POOL entries and if SKB is set to
4418  * non NULL it is unmapped and freed
4419  */
4420 void iwl_rx_queue_free(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
4421 {
4422         int i;
4423         for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
4424                 if (rxq->pool[i].skb != NULL) {
4425                         pci_unmap_single(priv->pci_dev,
4426                                          rxq->pool[i].dma_addr,
4427                                          IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
4428                         dev_kfree_skb(rxq->pool[i].skb);
4429                 }
4430         }
4431
4432         pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd,
4433                             rxq->dma_addr);
4434         rxq->bd = NULL;
4435 }
4436
4437 int iwl_rx_queue_alloc(struct iwl_priv *priv)
4438 {
4439         struct iwl_rx_queue *rxq = &priv->rxq;
4440         struct pci_dev *dev = priv->pci_dev;
4441         int i;
4442
4443         spin_lock_init(&rxq->lock);
4444         INIT_LIST_HEAD(&rxq->rx_free);
4445         INIT_LIST_HEAD(&rxq->rx_used);
4446         rxq->bd = pci_alloc_consistent(dev, 4 * RX_QUEUE_SIZE, &rxq->dma_addr);
4447         if (!rxq->bd)
4448                 return -ENOMEM;
4449         /* Fill the rx_used queue with _all_ of the Rx buffers */
4450         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++)
4451                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
4452         /* Set us so that we have processed and used all buffers, but have
4453          * not restocked the Rx queue with fresh buffers */
4454         rxq->read = rxq->write = 0;
4455         rxq->free_count = 0;
4456         rxq->need_update = 0;
4457         return 0;
4458 }
4459
4460 void iwl_rx_queue_reset(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
4461 {
4462         unsigned long flags;
4463         int i;
4464         spin_lock_irqsave(&rxq->lock, flags);
4465         INIT_LIST_HEAD(&rxq->rx_free);
4466         INIT_LIST_HEAD(&rxq->rx_used);
4467         /* Fill the rx_used queue with _all_ of the Rx buffers */
4468         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
4469                 /* In the reset function, these buffers may have been allocated
4470                  * to an SKB, so we need to unmap and free potential storage */
4471                 if (rxq->pool[i].skb != NULL) {
4472                         pci_unmap_single(priv->pci_dev,
4473                                          rxq->pool[i].dma_addr,
4474                                          IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
4475                         priv->alloc_rxb_skb--;
4476                         dev_kfree_skb(rxq->pool[i].skb);
4477                         rxq->pool[i].skb = NULL;
4478                 }
4479                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
4480         }
4481
4482         /* Set us so that we have processed and used all buffers, but have
4483          * not restocked the Rx queue with fresh buffers */
4484         rxq->read = rxq->write = 0;
4485         rxq->free_count = 0;
4486         spin_unlock_irqrestore(&rxq->lock, flags);
4487 }
4488
4489 /* Convert linear signal-to-noise ratio into dB */
4490 static u8 ratio2dB[100] = {
4491 /*       0   1   2   3   4   5   6   7   8   9 */
4492          0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
4493         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
4494         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
4495         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
4496         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
4497         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
4498         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
4499         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
4500         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
4501         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
4502 };
4503
4504 /* Calculates a relative dB value from a ratio of linear
4505  *   (i.e. not dB) signal levels.
4506  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
4507 int iwl_calc_db_from_ratio(int sig_ratio)
4508 {
4509         /* 1000:1 or higher just report as 60 dB */
4510         if (sig_ratio >= 1000)
4511                 return 60;
4512
4513         /* 100:1 or higher, divide by 10 and use table,
4514          *   add 20 dB to make up for divide by 10 */
4515         if (sig_ratio >= 100)
4516                 return (20 + (int)ratio2dB[sig_ratio/10]);
4517
4518         /* We shouldn't see this */
4519         if (sig_ratio < 1)
4520                 return 0;
4521
4522         /* Use table for ratios 1:1 - 99:1 */
4523         return (int)ratio2dB[sig_ratio];
4524 }
4525
4526 #define PERFECT_RSSI (-20) /* dBm */
4527 #define WORST_RSSI (-95)   /* dBm */
4528 #define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)
4529
4530 /* Calculate an indication of rx signal quality (a percentage, not dBm!).
4531  * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
4532  *   about formulas used below. */
4533 int iwl_calc_sig_qual(int rssi_dbm, int noise_dbm)
4534 {
4535         int sig_qual;
4536         int degradation = PERFECT_RSSI - rssi_dbm;
4537
4538         /* If we get a noise measurement, use signal-to-noise ratio (SNR)
4539          * as indicator; formula is (signal dbm - noise dbm).
4540          * SNR at or above 40 is a great signal (100%).
4541          * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
4542          * Weakest usable signal is usually 10 - 15 dB SNR. */
4543         if (noise_dbm) {
4544                 if (rssi_dbm - noise_dbm >= 40)
4545                         return 100;
4546                 else if (rssi_dbm < noise_dbm)
4547                         return 0;
4548                 sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;
4549
4550         /* Else use just the signal level.
4551          * This formula is a least squares fit of data points collected and
4552          *   compared with a reference system that had a percentage (%) display
4553          *   for signal quality. */
4554         } else
4555                 sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
4556                             (15 * RSSI_RANGE + 62 * degradation)) /
4557                            (RSSI_RANGE * RSSI_RANGE);
4558
4559         if (sig_qual > 100)
4560                 sig_qual = 100;
4561         else if (sig_qual < 1)
4562                 sig_qual = 0;
4563
4564         return sig_qual;
4565 }
4566
4567 /**
4568  * iwl_rx_handle - Main entry function for receiving responses from the uCode
4569  *
4570  * Uses the priv->rx_handlers callback function array to invoke
4571  * the appropriate handlers, including command responses,
4572  * frame-received notifications, and other notifications.
4573  */
4574 static void iwl_rx_handle(struct iwl_priv *priv)
4575 {
4576         struct iwl_rx_mem_buffer *rxb;
4577         struct iwl_rx_packet *pkt;
4578         struct iwl_rx_queue *rxq = &priv->rxq;
4579         u32 r, i;
4580         int reclaim;
4581         unsigned long flags;
4582
4583         r = iwl_hw_get_rx_read(priv);
4584         i = rxq->read;
4585
4586         /* Rx interrupt, but nothing sent from uCode */
4587         if (i == r)
4588                 IWL_DEBUG(IWL_DL_RX | IWL_DL_ISR, "r = %d, i = %d\n", r, i);
4589
4590         while (i != r) {
4591                 rxb = rxq->queue[i];
4592
4593                 /* If an RXB doesn't have a queue slot associated with it
4594                  * then a bug has been introduced in the queue refilling
4595                  * routines -- catch it here */
4596                 BUG_ON(rxb == NULL);
4597
4598                 rxq->queue[i] = NULL;
4599
4600                 pci_dma_sync_single_for_cpu(priv->pci_dev, rxb->dma_addr,
4601                                             IWL_RX_BUF_SIZE,
4602                                             PCI_DMA_FROMDEVICE);
4603                 pkt = (struct iwl_rx_packet *)rxb->skb->data;
4604
4605                 /* Reclaim a command buffer only if this packet is a response
4606                  *   to a (driver-originated) command.
4607                  * If the packet (e.g. Rx frame) originated from uCode,
4608                  *   there is no command buffer to reclaim.
4609                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
4610                  *   but apparently a few don't get set; catch them here. */
4611                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
4612                         (pkt->hdr.cmd != REPLY_RX_PHY_CMD) &&
4613                         (pkt->hdr.cmd != REPLY_4965_RX) &&
4614                         (pkt->hdr.cmd != REPLY_COMPRESSED_BA) &&
4615                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
4616                         (pkt->hdr.cmd != REPLY_TX);
4617
4618                 /* Based on type of command response or notification,
4619                  *   handle those that need handling via function in
4620                  *   rx_handlers table.  See iwl_setup_rx_handlers() */
4621                 if (priv->rx_handlers[pkt->hdr.cmd]) {
4622                         IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
4623                                 "r = %d, i = %d, %s, 0x%02x\n", r, i,
4624                                 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
4625                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
4626                 } else {
4627                         /* No handling needed */
4628                         IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
4629                                 "r %d i %d No handler needed for %s, 0x%02x\n",
4630                                 r, i, get_cmd_string(pkt->hdr.cmd),
4631                                 pkt->hdr.cmd);
4632                 }
4633
4634                 if (reclaim) {
4635                         /* Invoke any callbacks, transfer the skb to caller,
4636                          * and fire off the (possibly) blocking iwl_send_cmd()
4637                          * as we reclaim the driver command queue */
4638                         if (rxb && rxb->skb)
4639                                 iwl_tx_cmd_complete(priv, rxb);
4640                         else
4641                                 IWL_WARNING("Claim null rxb?\n");
4642                 }
4643
4644                 /* For now we just don't re-use anything.  We can tweak this
4645                  * later to try and re-use notification packets and SKBs that
4646                  * fail to Rx correctly */
4647                 if (rxb->skb != NULL) {
4648                         priv->alloc_rxb_skb--;
4649                         dev_kfree_skb_any(rxb->skb);
4650                         rxb->skb = NULL;
4651                 }
4652
4653                 pci_unmap_single(priv->pci_dev, rxb->dma_addr,
4654                                  IWL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
4655                 spin_lock_irqsave(&rxq->lock, flags);
4656                 list_add_tail(&rxb->list, &priv->rxq.rx_used);
4657                 spin_unlock_irqrestore(&rxq->lock, flags);
4658                 i = (i + 1) & RX_QUEUE_MASK;
4659         }
4660
4661         /* Backtrack one entry */
4662         priv->rxq.read = i;
4663         iwl_rx_queue_restock(priv);
4664 }
4665
4666 int iwl_tx_queue_update_write_ptr(struct iwl_priv *priv,
4667                                   struct iwl_tx_queue *txq)
4668 {
4669         u32 reg = 0;
4670         int rc = 0;
4671         int txq_id = txq->q.id;
4672
4673         if (txq->need_update == 0)
4674                 return rc;
4675
4676         /* if we're trying to save power */
4677         if (test_bit(STATUS_POWER_PMI, &priv->status)) {
4678                 /* wake up nic if it's powered down ...
4679                  * uCode will wake up, and interrupt us again, so next
4680                  * time we'll skip this part. */
4681                 reg = iwl_read32(priv, CSR_UCODE_DRV_GP1);
4682
4683                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
4684                         IWL_DEBUG_INFO("Requesting wakeup, GP1 = 0x%x\n", reg);
4685                         iwl_set_bit(priv, CSR_GP_CNTRL,
4686                                     CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
4687                         return rc;
4688                 }
4689
4690                 /* restore this queue's parameters in nic hardware. */
4691                 rc = iwl_grab_restricted_access(priv);
4692                 if (rc)
4693                         return rc;
4694                 iwl_write_restricted(priv, HBUS_TARG_WRPTR,
4695                                      txq->q.first_empty | (txq_id << 8));
4696                 iwl_release_restricted_access(priv);
4697
4698         /* else not in power-save mode, uCode will never sleep when we're
4699          * trying to tx (during RFKILL, we're not trying to tx). */
4700         } else
4701                 iwl_write32(priv, HBUS_TARG_WRPTR,
4702                             txq->q.first_empty | (txq_id << 8));
4703
4704         txq->need_update = 0;
4705
4706         return rc;
4707 }
4708
4709 #ifdef CONFIG_IWLWIFI_DEBUG
4710 static void iwl_print_rx_config_cmd(struct iwl_rxon_cmd *rxon)
4711 {
4712         DECLARE_MAC_BUF(mac);
4713
4714         IWL_DEBUG_RADIO("RX CONFIG:\n");
4715         iwl_print_hex_dump(IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
4716         IWL_DEBUG_RADIO("u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
4717         IWL_DEBUG_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
4718         IWL_DEBUG_RADIO("u32 filter_flags: 0x%08x\n",
4719                         le32_to_cpu(rxon->filter_flags));
4720         IWL_DEBUG_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type);
4721         IWL_DEBUG_RADIO("u8 ofdm_basic_rates: 0x%02x\n",
4722                         rxon->ofdm_basic_rates);
4723         IWL_DEBUG_RADIO("u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
4724         IWL_DEBUG_RADIO("u8[6] node_addr: %s\n",
4725                         print_mac(mac, rxon->node_addr));
4726         IWL_DEBUG_RADIO("u8[6] bssid_addr: %s\n",
4727                         print_mac(mac, rxon->bssid_addr));
4728         IWL_DEBUG_RADIO("u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
4729 }
4730 #endif
4731
4732 static void iwl_enable_interrupts(struct iwl_priv *priv)
4733 {
4734         IWL_DEBUG_ISR("Enabling interrupts\n");
4735         set_bit(STATUS_INT_ENABLED, &priv->status);
4736         iwl_write32(priv, CSR_INT_MASK, CSR_INI_SET_MASK);
4737 }
4738
4739 static inline void iwl_disable_interrupts(struct iwl_priv *priv)
4740 {
4741         clear_bit(STATUS_INT_ENABLED, &priv->status);
4742
4743         /* disable interrupts from uCode/NIC to host */
4744         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
4745
4746         /* acknowledge/clear/reset any interrupts still pending
4747          * from uCode or flow handler (Rx/Tx DMA) */
4748         iwl_write32(priv, CSR_INT, 0xffffffff);
4749         iwl_write32(priv, CSR_FH_INT_STATUS, 0xffffffff);
4750         IWL_DEBUG_ISR("Disabled interrupts\n");
4751 }
4752
4753 static const char *desc_lookup(int i)
4754 {
4755         switch (i) {
4756         case 1:
4757                 return "FAIL";
4758         case 2:
4759                 return "BAD_PARAM";
4760         case 3:
4761                 return "BAD_CHECKSUM";
4762         case 4:
4763                 return "NMI_INTERRUPT";
4764         case 5:
4765                 return "SYSASSERT";
4766         case 6:
4767                 return "FATAL_ERROR";
4768         }
4769
4770         return "UNKNOWN";
4771 }
4772
4773 #define ERROR_START_OFFSET  (1 * sizeof(u32))
4774 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
4775
4776 static void iwl_dump_nic_error_log(struct iwl_priv *priv)
4777 {
4778         u32 data2, line;
4779         u32 desc, time, count, base, data1;
4780         u32 blink1, blink2, ilink1, ilink2;
4781         int rc;
4782
4783         base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
4784
4785         if (!iwl_hw_valid_rtc_data_addr(base)) {
4786                 IWL_ERROR("Not valid error log pointer 0x%08X\n", base);
4787                 return;
4788         }
4789
4790         rc = iwl_grab_restricted_access(priv);
4791         if (rc) {
4792                 IWL_WARNING("Can not read from adapter at this time.\n");
4793                 return;
4794         }
4795
4796         count = iwl_read_restricted_mem(priv, base);
4797
4798         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
4799                 IWL_ERROR("Start IWL Error Log Dump:\n");
4800                 IWL_ERROR("Status: 0x%08lX, Config: %08X count: %d\n",
4801                           priv->status, priv->config, count);
4802         }
4803
4804         desc = iwl_read_restricted_mem(priv, base + 1 * sizeof(u32));
4805         blink1 = iwl_read_restricted_mem(priv, base + 3 * sizeof(u32));
4806         blink2 = iwl_read_restricted_mem(priv, base + 4 * sizeof(u32));
4807         ilink1 = iwl_read_restricted_mem(priv, base + 5 * sizeof(u32));
4808         ilink2 = iwl_read_restricted_mem(priv, base + 6 * sizeof(u32));
4809         data1 = iwl_read_restricted_mem(priv, base + 7 * sizeof(u32));
4810         data2 = iwl_read_restricted_mem(priv, base + 8 * sizeof(u32));
4811         line = iwl_read_restricted_mem(priv, base + 9 * sizeof(u32));
4812         time = iwl_read_restricted_mem(priv, base + 11 * sizeof(u32));
4813
4814         IWL_ERROR("Desc               Time       "
4815                   "data1      data2      line\n");
4816         IWL_ERROR("%-13s (#%d) %010u 0x%08X 0x%08X %u\n",
4817                   desc_lookup(desc), desc, time, data1, data2, line);
4818         IWL_ERROR("blink1  blink2  ilink1  ilink2\n");
4819         IWL_ERROR("0x%05X 0x%05X 0x%05X 0x%05X\n", blink1, blink2,
4820                   ilink1, ilink2);
4821
4822         iwl_release_restricted_access(priv);
4823 }
4824
4825 #define EVENT_START_OFFSET  (4 * sizeof(u32))
4826
4827 /**
4828  * iwl_print_event_log - Dump error event log to syslog
4829  *
4830  * NOTE: Must be called with iwl_grab_restricted_access() already obtained!
4831  */
4832 static void iwl_print_event_log(struct iwl_priv *priv, u32 start_idx,
4833                                 u32 num_events, u32 mode)
4834 {
4835         u32 i;
4836         u32 base;       /* SRAM byte address of event log header */
4837         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
4838         u32 ptr;        /* SRAM byte address of log data */
4839         u32 ev, time, data; /* event log data */
4840
4841         if (num_events == 0)
4842                 return;
4843
4844         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4845
4846         if (mode == 0)
4847                 event_size = 2 * sizeof(u32);
4848         else
4849                 event_size = 3 * sizeof(u32);
4850
4851         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
4852
4853         /* "time" is actually "data" for mode 0 (no timestamp).
4854          * place event id # at far right for easier visual parsing. */
4855         for (i = 0; i < num_events; i++) {
4856                 ev = iwl_read_restricted_mem(priv, ptr);
4857                 ptr += sizeof(u32);
4858                 time = iwl_read_restricted_mem(priv, ptr);
4859                 ptr += sizeof(u32);
4860                 if (mode == 0)
4861                         IWL_ERROR("0x%08x\t%04u\n", time, ev); /* data, ev */
4862                 else {
4863                         data = iwl_read_restricted_mem(priv, ptr);
4864                         ptr += sizeof(u32);
4865                         IWL_ERROR("%010u\t0x%08x\t%04u\n", time, data, ev);
4866                 }
4867         }
4868 }
4869
4870 static void iwl_dump_nic_event_log(struct iwl_priv *priv)
4871 {
4872         int rc;
4873         u32 base;       /* SRAM byte address of event log header */
4874         u32 capacity;   /* event log capacity in # entries */
4875         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
4876         u32 num_wraps;  /* # times uCode wrapped to top of log */
4877         u32 next_entry; /* index of next entry to be written by uCode */
4878         u32 size;       /* # entries that we'll print */
4879
4880         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4881         if (!iwl_hw_valid_rtc_data_addr(base)) {
4882                 IWL_ERROR("Invalid event log pointer 0x%08X\n", base);
4883                 return;
4884         }
4885
4886         rc = iwl_grab_restricted_access(priv);
4887         if (rc) {
4888                 IWL_WARNING("Can not read from adapter at this time.\n");
4889                 return;
4890         }
4891
4892         /* event log header */
4893         capacity = iwl_read_restricted_mem(priv, base);
4894         mode = iwl_read_restricted_mem(priv, base + (1 * sizeof(u32)));
4895         num_wraps = iwl_read_restricted_mem(priv, base + (2 * sizeof(u32)));
4896         next_entry = iwl_read_restricted_mem(priv, base + (3 * sizeof(u32)));
4897
4898         size = num_wraps ? capacity : next_entry;
4899
4900         /* bail out if nothing in log */
4901         if (size == 0) {
4902                 IWL_ERROR("Start IWL Event Log Dump: nothing in log\n");
4903                 iwl_release_restricted_access(priv);
4904                 return;
4905         }
4906
4907         IWL_ERROR("Start IWL Event Log Dump: display count %d, wraps %d\n",
4908                   size, num_wraps);
4909
4910         /* if uCode has wrapped back to top of log, start at the oldest entry,
4911          * i.e the next one that uCode would fill. */
4912         if (num_wraps)
4913                 iwl_print_event_log(priv, next_entry,
4914                                     capacity - next_entry, mode);
4915
4916         /* (then/else) start at top of log */
4917         iwl_print_event_log(priv, 0, next_entry, mode);
4918
4919         iwl_release_restricted_access(priv);
4920 }
4921
4922 /**
4923  * iwl_irq_handle_error - called for HW or SW error interrupt from card
4924  */
4925 static void iwl_irq_handle_error(struct iwl_priv *priv)
4926 {
4927         /* Set the FW error flag -- cleared on iwl_down */
4928         set_bit(STATUS_FW_ERROR, &priv->status);
4929
4930         /* Cancel currently queued command. */
4931         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
4932
4933 #ifdef CONFIG_IWLWIFI_DEBUG
4934         if (iwl_debug_level & IWL_DL_FW_ERRORS) {
4935                 iwl_dump_nic_error_log(priv);
4936                 iwl_dump_nic_event_log(priv);
4937                 iwl_print_rx_config_cmd(&priv->staging_rxon);
4938         }
4939 #endif
4940
4941         wake_up_interruptible(&priv->wait_command_queue);
4942
4943         /* Keep the restart process from trying to send host
4944          * commands by clearing the INIT status bit */
4945         clear_bit(STATUS_READY, &priv->status);
4946
4947         if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
4948                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_FW_ERRORS,
4949                           "Restarting adapter due to uCode error.\n");
4950
4951                 if (iwl_is_associated(priv)) {
4952                         memcpy(&priv->recovery_rxon, &priv->active_rxon,
4953                                sizeof(priv->recovery_rxon));
4954                         priv->error_recovering = 1;
4955                 }
4956                 queue_work(priv->workqueue, &priv->restart);
4957         }
4958 }
4959
4960 static void iwl_error_recovery(struct iwl_priv *priv)
4961 {
4962         unsigned long flags;
4963
4964         memcpy(&priv->staging_rxon, &priv->recovery_rxon,
4965                sizeof(priv->staging_rxon));
4966         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
4967         iwl_commit_rxon(priv);
4968
4969         iwl_rxon_add_station(priv, priv->bssid, 1);
4970
4971         spin_lock_irqsave(&priv->lock, flags);
4972         priv->assoc_id = le16_to_cpu(priv->staging_rxon.assoc_id);
4973         priv->error_recovering = 0;
4974         spin_unlock_irqrestore(&priv->lock, flags);
4975 }
4976
4977 static void iwl_irq_tasklet(struct iwl_priv *priv)
4978 {
4979         u32 inta, handled = 0;
4980         u32 inta_fh;
4981         unsigned long flags;
4982 #ifdef CONFIG_IWLWIFI_DEBUG
4983         u32 inta_mask;
4984 #endif
4985
4986         spin_lock_irqsave(&priv->lock, flags);
4987
4988         /* Ack/clear/reset pending uCode interrupts.
4989          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
4990          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
4991         inta = iwl_read32(priv, CSR_INT);
4992         iwl_write32(priv, CSR_INT, inta);
4993
4994         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
4995          * Any new interrupts that happen after this, either while we're
4996          * in this tasklet, or later, will show up in next ISR/tasklet. */
4997         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
4998         iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
4999
5000 #ifdef CONFIG_IWLWIFI_DEBUG
5001         if (iwl_debug_level & IWL_DL_ISR) {
5002                 inta_mask = iwl_read32(priv, CSR_INT_MASK); /* just for debug */
5003                 IWL_DEBUG_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
5004                               inta, inta_mask, inta_fh);
5005         }
5006 #endif
5007
5008         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
5009          * atomic, make sure that inta covers all the interrupts that
5010          * we've discovered, even if FH interrupt came in just after
5011          * reading CSR_INT. */
5012         if (inta_fh & CSR_FH_INT_RX_MASK)
5013                 inta |= CSR_INT_BIT_FH_RX;
5014         if (inta_fh & CSR_FH_INT_TX_MASK)
5015                 inta |= CSR_INT_BIT_FH_TX;
5016
5017         /* Now service all interrupt bits discovered above. */
5018         if (inta & CSR_INT_BIT_HW_ERR) {
5019                 IWL_ERROR("Microcode HW error detected.  Restarting.\n");
5020
5021                 /* Tell the device to stop sending interrupts */
5022                 iwl_disable_interrupts(priv);
5023
5024                 iwl_irq_handle_error(priv);
5025
5026                 handled |= CSR_INT_BIT_HW_ERR;
5027
5028                 spin_unlock_irqrestore(&priv->lock, flags);
5029
5030                 return;
5031         }
5032
5033 #ifdef CONFIG_IWLWIFI_DEBUG
5034         if (iwl_debug_level & (IWL_DL_ISR)) {
5035                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
5036                 if (inta & CSR_INT_BIT_MAC_CLK_ACTV)
5037                         IWL_DEBUG_ISR("Microcode started or stopped.\n");
5038
5039                 /* Alive notification via Rx interrupt will do the real work */
5040                 if (inta & CSR_INT_BIT_ALIVE)
5041                         IWL_DEBUG_ISR("Alive interrupt\n");
5042         }
5043 #endif
5044         /* Safely ignore these bits for debug checks below */
5045         inta &= ~(CSR_INT_BIT_MAC_CLK_ACTV | CSR_INT_BIT_ALIVE);
5046
5047         /* HW RF KILL switch toggled (4965 only) */
5048         if (inta & CSR_INT_BIT_RF_KILL) {
5049                 int hw_rf_kill = 0;
5050                 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
5051                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
5052                         hw_rf_kill = 1;
5053
5054                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL | IWL_DL_ISR,
5055                                 "RF_KILL bit toggled to %s.\n",
5056                                 hw_rf_kill ? "disable radio":"enable radio");
5057
5058                 /* Queue restart only if RF_KILL switch was set to "kill"
5059                  *   when we loaded driver, and is now set to "enable".
5060                  * After we're Alive, RF_KILL gets handled by
5061                  *   iwl_rx_card_state_notif() */
5062                 if (!hw_rf_kill && !test_bit(STATUS_ALIVE, &priv->status))
5063                         queue_work(priv->workqueue, &priv->restart);
5064
5065                 handled |= CSR_INT_BIT_RF_KILL;
5066         }
5067
5068         /* Chip got too hot and stopped itself (4965 only) */
5069         if (inta & CSR_INT_BIT_CT_KILL) {
5070                 IWL_ERROR("Microcode CT kill error detected.\n");
5071                 handled |= CSR_INT_BIT_CT_KILL;
5072         }
5073
5074         /* Error detected by uCode */
5075         if (inta & CSR_INT_BIT_SW_ERR) {
5076                 IWL_ERROR("Microcode SW error detected.  Restarting 0x%X.\n",
5077                           inta);
5078                 iwl_irq_handle_error(priv);
5079                 handled |= CSR_INT_BIT_SW_ERR;
5080         }
5081
5082         /* uCode wakes up after power-down sleep */
5083         if (inta & CSR_INT_BIT_WAKEUP) {
5084                 IWL_DEBUG_ISR("Wakeup interrupt\n");
5085                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
5086                 iwl_tx_queue_update_write_ptr(priv, &priv->txq[0]);
5087                 iwl_tx_queue_update_write_ptr(priv, &priv->txq[1]);
5088                 iwl_tx_queue_update_write_ptr(priv, &priv->txq[2]);
5089                 iwl_tx_queue_update_write_ptr(priv, &priv->txq[3]);
5090                 iwl_tx_queue_update_write_ptr(priv, &priv->txq[4]);
5091                 iwl_tx_queue_update_write_ptr(priv, &priv->txq[5]);
5092
5093                 handled |= CSR_INT_BIT_WAKEUP;
5094         }
5095
5096         /* All uCode command responses, including Tx command responses,
5097          * Rx "responses" (frame-received notification), and other
5098          * notifications from uCode come through here*/
5099         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
5100                 iwl_rx_handle(priv);
5101                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
5102         }
5103
5104         if (inta & CSR_INT_BIT_FH_TX) {
5105                 IWL_DEBUG_ISR("Tx interrupt\n");
5106                 handled |= CSR_INT_BIT_FH_TX;
5107         }
5108
5109         if (inta & ~handled)
5110                 IWL_ERROR("Unhandled INTA bits 0x%08x\n", inta & ~handled);
5111
5112         if (inta & ~CSR_INI_SET_MASK) {
5113                 IWL_WARNING("Disabled INTA bits 0x%08x were pending\n",
5114                          inta & ~CSR_INI_SET_MASK);
5115                 IWL_WARNING("   with FH_INT = 0x%08x\n", inta_fh);
5116         }
5117
5118         /* Re-enable all interrupts */
5119         iwl_enable_interrupts(priv);
5120
5121 #ifdef CONFIG_IWLWIFI_DEBUG
5122         if (iwl_debug_level & (IWL_DL_ISR)) {
5123                 inta = iwl_read32(priv, CSR_INT);
5124                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
5125                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
5126                 IWL_DEBUG_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
5127                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
5128         }
5129 #endif
5130         spin_unlock_irqrestore(&priv->lock, flags);
5131 }
5132
5133 static irqreturn_t iwl_isr(int irq, void *data)
5134 {
5135         struct iwl_priv *priv = data;
5136         u32 inta, inta_mask;
5137         u32 inta_fh;
5138         if (!priv)
5139                 return IRQ_NONE;
5140
5141         spin_lock(&priv->lock);
5142
5143         /* Disable (but don't clear!) interrupts here to avoid
5144          *    back-to-back ISRs and sporadic interrupts from our NIC.
5145          * If we have something to service, the tasklet will re-enable ints.
5146          * If we *don't* have something, we'll re-enable before leaving here. */
5147         inta_mask = iwl_read32(priv, CSR_INT_MASK);  /* just for debug */
5148         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
5149
5150         /* Discover which interrupts are active/pending */
5151         inta = iwl_read32(priv, CSR_INT);
5152         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
5153
5154         /* Ignore interrupt if there's nothing in NIC to service.
5155          * This may be due to IRQ shared with another device,
5156          * or due to sporadic interrupts thrown from our NIC. */
5157         if (!inta && !inta_fh) {
5158                 IWL_DEBUG_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n");
5159                 goto none;
5160         }
5161
5162         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
5163                 /* Hardware disappeared. It might have already raised
5164                  * an interrupt */
5165                 IWL_WARNING("HARDWARE GONE?? INTA == 0x%080x\n", inta);
5166                 goto unplugged;
5167         }
5168
5169         IWL_DEBUG_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
5170                       inta, inta_mask, inta_fh);
5171
5172         /* iwl_irq_tasklet() will service interrupts and re-enable them */
5173         tasklet_schedule(&priv->irq_tasklet);
5174
5175  unplugged:
5176         spin_unlock(&priv->lock);
5177         return IRQ_HANDLED;
5178
5179  none:
5180         /* re-enable interrupts here since we don't have anything to service. */
5181         iwl_enable_interrupts(priv);
5182         spin_unlock(&priv->lock);
5183         return IRQ_NONE;
5184 }
5185
5186 /************************** EEPROM BANDS ****************************
5187  *
5188  * The iwl_eeprom_band definitions below provide the mapping from the
5189  * EEPROM contents to the specific channel number supported for each
5190  * band.
5191  *
5192  * For example, iwl_priv->eeprom.band_3_channels[4] from the band_3
5193  * definition below maps to physical channel 42 in the 5.2GHz spectrum.
5194  * The specific geography and calibration information for that channel
5195  * is contained in the eeprom map itself.
5196  *
5197  * During init, we copy the eeprom information and channel map
5198  * information into priv->channel_info_24/52 and priv->channel_map_24/52
5199  *
5200  * channel_map_24/52 provides the index in the channel_info array for a
5201  * given channel.  We have to have two separate maps as there is channel
5202  * overlap with the 2.4GHz and 5.2GHz spectrum as seen in band_1 and
5203  * band_2
5204  *
5205  * A value of 0xff stored in the channel_map indicates that the channel
5206  * is not supported by the hardware at all.
5207  *
5208  * A value of 0xfe in the channel_map indicates that the channel is not
5209  * valid for Tx with the current hardware.  This means that
5210  * while the system can tune and receive on a given channel, it may not
5211  * be able to associate or transmit any frames on that
5212  * channel.  There is no corresponding channel information for that
5213  * entry.
5214  *
5215  *********************************************************************/
5216
5217 /* 2.4 GHz */
5218 static const u8 iwl_eeprom_band_1[14] = {
5219         1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14
5220 };
5221
5222 /* 5.2 GHz bands */
5223 static const u8 iwl_eeprom_band_2[] = {
5224         183, 184, 185, 187, 188, 189, 192, 196, 7, 8, 11, 12, 16
5225 };
5226
5227 static const u8 iwl_eeprom_band_3[] = { /* 5205-5320MHz */
5228         34, 36, 38, 40, 42, 44, 46, 48, 52, 56, 60, 64
5229 };
5230
5231 static const u8 iwl_eeprom_band_4[] = { /* 5500-5700MHz */
5232         100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140
5233 };
5234
5235 static const u8 iwl_eeprom_band_5[] = { /* 5725-5825MHz */
5236         145, 149, 153, 157, 161, 165
5237 };
5238
5239 static u8 iwl_eeprom_band_6[] = {       /* 2.4 FAT channel */
5240         1, 2, 3, 4, 5, 6, 7
5241 };
5242
5243 static u8 iwl_eeprom_band_7[] = {       /* 5.2 FAT channel */
5244         36, 44, 52, 60, 100, 108, 116, 124, 132, 149, 157
5245 };
5246
5247 static void iwl_init_band_reference(const struct iwl_priv *priv, int band,
5248                                     int *eeprom_ch_count,
5249                                     const struct iwl_eeprom_channel
5250                                     **eeprom_ch_info,
5251                                     const u8 **eeprom_ch_index)
5252 {
5253         switch (band) {
5254         case 1:         /* 2.4GHz band */
5255                 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_1);
5256                 *eeprom_ch_info = priv->eeprom.band_1_channels;
5257                 *eeprom_ch_index = iwl_eeprom_band_1;
5258                 break;
5259         case 2:         /* 5.2GHz band */
5260                 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_2);
5261                 *eeprom_ch_info = priv->eeprom.band_2_channels;
5262                 *eeprom_ch_index = iwl_eeprom_band_2;
5263                 break;
5264         case 3:         /* 5.2GHz band */
5265                 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_3);
5266                 *eeprom_ch_info = priv->eeprom.band_3_channels;
5267                 *eeprom_ch_index = iwl_eeprom_band_3;
5268                 break;
5269         case 4:         /* 5.2GHz band */
5270                 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_4);
5271                 *eeprom_ch_info = priv->eeprom.band_4_channels;
5272                 *eeprom_ch_index = iwl_eeprom_band_4;
5273                 break;
5274         case 5:         /* 5.2GHz band */
5275                 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_5);
5276                 *eeprom_ch_info = priv->eeprom.band_5_channels;
5277                 *eeprom_ch_index = iwl_eeprom_band_5;
5278                 break;
5279         case 6:
5280                 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_6);
5281                 *eeprom_ch_info = priv->eeprom.band_24_channels;
5282                 *eeprom_ch_index = iwl_eeprom_band_6;
5283                 break;
5284         case 7:
5285                 *eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_7);
5286                 *eeprom_ch_info = priv->eeprom.band_52_channels;
5287                 *eeprom_ch_index = iwl_eeprom_band_7;
5288                 break;
5289         default:
5290                 BUG();
5291                 return;
5292         }
5293 }
5294
5295 const struct iwl_channel_info *iwl_get_channel_info(const struct iwl_priv *priv,
5296                                                     int phymode, u16 channel)
5297 {
5298         int i;
5299
5300         switch (phymode) {
5301         case MODE_IEEE80211A:
5302                 for (i = 14; i < priv->channel_count; i++) {
5303                         if (priv->channel_info[i].channel == channel)
5304                                 return &priv->channel_info[i];
5305                 }
5306                 break;
5307
5308         case MODE_IEEE80211B:
5309         case MODE_IEEE80211G:
5310                 if (channel >= 1 && channel <= 14)
5311                         return &priv->channel_info[channel - 1];
5312                 break;
5313
5314         }
5315
5316         return NULL;
5317 }
5318
5319 #define CHECK_AND_PRINT(x) ((eeprom_ch_info[ch].flags & EEPROM_CHANNEL_##x) \
5320                             ? # x " " : "")
5321
5322 static int iwl_init_channel_map(struct iwl_priv *priv)
5323 {
5324         int eeprom_ch_count = 0;
5325         const u8 *eeprom_ch_index = NULL;
5326         const struct iwl_eeprom_channel *eeprom_ch_info = NULL;
5327         int band, ch;
5328         struct iwl_channel_info *ch_info;
5329
5330         if (priv->channel_count) {
5331                 IWL_DEBUG_INFO("Channel map already initialized.\n");
5332                 return 0;
5333         }
5334
5335         if (priv->eeprom.version < 0x2f) {
5336                 IWL_WARNING("Unsupported EEPROM version: 0x%04X\n",
5337                             priv->eeprom.version);
5338                 return -EINVAL;
5339         }
5340
5341         IWL_DEBUG_INFO("Initializing regulatory info from EEPROM\n");
5342
5343         priv->channel_count =
5344             ARRAY_SIZE(iwl_eeprom_band_1) +
5345             ARRAY_SIZE(iwl_eeprom_band_2) +
5346             ARRAY_SIZE(iwl_eeprom_band_3) +
5347             ARRAY_SIZE(iwl_eeprom_band_4) +
5348             ARRAY_SIZE(iwl_eeprom_band_5);
5349
5350         IWL_DEBUG_INFO("Parsing data for %d channels.\n", priv->channel_count);
5351
5352         priv->channel_info = kzalloc(sizeof(struct iwl_channel_info) *
5353                                      priv->channel_count, GFP_KERNEL);
5354         if (!priv->channel_info) {
5355                 IWL_ERROR("Could not allocate channel_info\n");
5356                 priv->channel_count = 0;
5357                 return -ENOMEM;
5358         }
5359
5360         ch_info = priv->channel_info;
5361
5362         /* Loop through the 5 EEPROM bands adding them in order to the
5363          * channel map we maintain (that contains additional information than
5364          * what just in the EEPROM) */
5365         for (band = 1; band <= 5; band++) {
5366
5367                 iwl_init_band_reference(priv, band, &eeprom_ch_count,
5368                                         &eeprom_ch_info, &eeprom_ch_index);
5369
5370                 /* Loop through each band adding each of the channels */
5371                 for (ch = 0; ch < eeprom_ch_count; ch++) {
5372                         ch_info->channel = eeprom_ch_index[ch];
5373                         ch_info->phymode = (band == 1) ? MODE_IEEE80211B :
5374                             MODE_IEEE80211A;
5375
5376                         /* permanently store EEPROM's channel regulatory flags
5377                          *   and max power in channel info database. */
5378                         ch_info->eeprom = eeprom_ch_info[ch];
5379
5380                         /* Copy the run-time flags so they are there even on
5381                          * invalid channels */
5382                         ch_info->flags = eeprom_ch_info[ch].flags;
5383
5384                         if (!(is_channel_valid(ch_info))) {
5385                                 IWL_DEBUG_INFO("Ch. %d Flags %x [%sGHz] - "
5386                                                "No traffic\n",
5387                                                ch_info->channel,
5388                                                ch_info->flags,
5389                                                is_channel_a_band(ch_info) ?
5390                                                "5.2" : "2.4");
5391                                 ch_info++;
5392                                 continue;
5393                         }
5394
5395                         /* Initialize regulatory-based run-time data */
5396                         ch_info->max_power_avg = ch_info->curr_txpow =
5397                             eeprom_ch_info[ch].max_power_avg;
5398                         ch_info->scan_power = eeprom_ch_info[ch].max_power_avg;
5399                         ch_info->min_power = 0;
5400
5401                         IWL_DEBUG_INFO("Ch. %d [%sGHz] %s%s%s%s%s%s(0x%02x"
5402                                        " %ddBm): Ad-Hoc %ssupported\n",
5403                                        ch_info->channel,
5404                                        is_channel_a_band(ch_info) ?
5405                                        "5.2" : "2.4",
5406                                        CHECK_AND_PRINT(IBSS),
5407                                        CHECK_AND_PRINT(ACTIVE),
5408                                        CHECK_AND_PRINT(RADAR),
5409                                        CHECK_AND_PRINT(WIDE),
5410                                        CHECK_AND_PRINT(NARROW),
5411                                        CHECK_AND_PRINT(DFS),
5412                                        eeprom_ch_info[ch].flags,
5413                                        eeprom_ch_info[ch].max_power_avg,
5414                                        ((eeprom_ch_info[ch].
5415                                          flags & EEPROM_CHANNEL_IBSS)
5416                                         && !(eeprom_ch_info[ch].
5417                                              flags & EEPROM_CHANNEL_RADAR))
5418                                        ? "" : "not ");
5419
5420                         /* Set the user_txpower_limit to the highest power
5421                          * supported by any channel */
5422                         if (eeprom_ch_info[ch].max_power_avg >
5423                             priv->user_txpower_limit)
5424                                 priv->user_txpower_limit =
5425                                     eeprom_ch_info[ch].max_power_avg;
5426
5427                         ch_info++;
5428                 }
5429         }
5430
5431         for (band = 6; band <= 7; band++) {
5432                 int phymode;
5433                 u8 fat_extension_chan;
5434
5435                 iwl_init_band_reference(priv, band, &eeprom_ch_count,
5436                                         &eeprom_ch_info, &eeprom_ch_index);
5437
5438                 phymode = (band == 6) ? MODE_IEEE80211B : MODE_IEEE80211A;
5439                 /* Loop through each band adding each of the channels */
5440                 for (ch = 0; ch < eeprom_ch_count; ch++) {
5441
5442                         if ((band == 6) &&
5443                             ((eeprom_ch_index[ch] == 5) ||
5444                             (eeprom_ch_index[ch] == 6) ||
5445                             (eeprom_ch_index[ch] == 7)))
5446                                fat_extension_chan = HT_IE_EXT_CHANNEL_MAX;
5447                         else
5448                                 fat_extension_chan = HT_IE_EXT_CHANNEL_ABOVE;
5449
5450                         iwl4965_set_fat_chan_info(priv, phymode,
5451                                                   eeprom_ch_index[ch],
5452                                                   &(eeprom_ch_info[ch]),
5453                                                   fat_extension_chan);
5454
5455                         iwl4965_set_fat_chan_info(priv, phymode,
5456                                                   (eeprom_ch_index[ch] + 4),
5457                                                   &(eeprom_ch_info[ch]),
5458                                                   HT_IE_EXT_CHANNEL_BELOW);
5459                 }
5460         }
5461
5462         return 0;
5463 }
5464
5465 /* For active scan, listen ACTIVE_DWELL_TIME (msec) on each channel after
5466  * sending probe req.  This should be set long enough to hear probe responses
5467  * from more than one AP.  */
5468 #define IWL_ACTIVE_DWELL_TIME_24    (20)        /* all times in msec */
5469 #define IWL_ACTIVE_DWELL_TIME_52    (10)
5470
5471 /* For faster active scanning, scan will move to the next channel if fewer than
5472  * PLCP_QUIET_THRESH packets are heard on this channel within
5473  * ACTIVE_QUIET_TIME after sending probe request.  This shortens the dwell
5474  * time if it's a quiet channel (nothing responded to our probe, and there's
5475  * no other traffic).
5476  * Disable "quiet" feature by setting PLCP_QUIET_THRESH to 0. */
5477 #define IWL_PLCP_QUIET_THRESH       __constant_cpu_to_le16(1)   /* packets */
5478 #define IWL_ACTIVE_QUIET_TIME       __constant_cpu_to_le16(5)   /* msec */
5479
5480 /* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel.
5481  * Must be set longer than active dwell time.
5482  * For the most reliable scan, set > AP beacon interval (typically 100msec). */
5483 #define IWL_PASSIVE_DWELL_TIME_24   (20)        /* all times in msec */
5484 #define IWL_PASSIVE_DWELL_TIME_52   (10)
5485 #define IWL_PASSIVE_DWELL_BASE      (100)
5486 #define IWL_CHANNEL_TUNE_TIME       5
5487
5488 static inline u16 iwl_get_active_dwell_time(struct iwl_priv *priv, int phymode)
5489 {
5490         if (phymode == MODE_IEEE80211A)
5491                 return IWL_ACTIVE_DWELL_TIME_52;
5492         else
5493                 return IWL_ACTIVE_DWELL_TIME_24;
5494 }
5495
5496 static u16 iwl_get_passive_dwell_time(struct iwl_priv *priv, int phymode)
5497 {
5498         u16 active = iwl_get_active_dwell_time(priv, phymode);
5499         u16 passive = (phymode != MODE_IEEE80211A) ?
5500             IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_24 :
5501             IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_52;
5502
5503         if (iwl_is_associated(priv)) {
5504                 /* If we're associated, we clamp the maximum passive
5505                  * dwell time to be 98% of the beacon interval (minus
5506                  * 2 * channel tune time) */
5507                 passive = priv->beacon_int;
5508                 if ((passive > IWL_PASSIVE_DWELL_BASE) || !passive)
5509                         passive = IWL_PASSIVE_DWELL_BASE;
5510                 passive = (passive * 98) / 100 - IWL_CHANNEL_TUNE_TIME * 2;
5511         }
5512
5513         if (passive <= active)
5514                 passive = active + 1;
5515
5516         return passive;
5517 }
5518
5519 static int iwl_get_channels_for_scan(struct iwl_priv *priv, int phymode,
5520                                      u8 is_active, u8 direct_mask,
5521                                      struct iwl_scan_channel *scan_ch)
5522 {
5523         const struct ieee80211_channel *channels = NULL;
5524         const struct ieee80211_hw_mode *hw_mode;
5525         const struct iwl_channel_info *ch_info;
5526         u16 passive_dwell = 0;
5527         u16 active_dwell = 0;
5528         int added, i;
5529
5530         hw_mode = iwl_get_hw_mode(priv, phymode);
5531         if (!hw_mode)
5532                 return 0;
5533
5534         channels = hw_mode->channels;
5535
5536         active_dwell = iwl_get_active_dwell_time(priv, phymode);
5537         passive_dwell = iwl_get_passive_dwell_time(priv, phymode);
5538
5539         for (i = 0, added = 0; i < hw_mode->num_channels; i++) {
5540                 if (channels[i].chan ==
5541                     le16_to_cpu(priv->active_rxon.channel)) {
5542                         if (iwl_is_associated(priv)) {
5543                                 IWL_DEBUG_SCAN
5544                                     ("Skipping current channel %d\n",
5545                                      le16_to_cpu(priv->active_rxon.channel));
5546                                 continue;
5547                         }
5548                 } else if (priv->only_active_channel)
5549                         continue;
5550
5551                 scan_ch->channel = channels[i].chan;
5552
5553                 ch_info = iwl_get_channel_info(priv, phymode, scan_ch->channel);
5554                 if (!is_channel_valid(ch_info)) {
5555                         IWL_DEBUG_SCAN("Channel %d is INVALID for this SKU.\n",
5556                                        scan_ch->channel);
5557                         continue;
5558                 }
5559
5560                 if (!is_active || is_channel_passive(ch_info) ||
5561                     !(channels[i].flag & IEEE80211_CHAN_W_ACTIVE_SCAN))
5562                         scan_ch->type = 0;      /* passive */
5563                 else
5564                         scan_ch->type = 1;      /* active */
5565
5566                 if (scan_ch->type & 1)
5567                         scan_ch->type |= (direct_mask << 1);
5568
5569                 if (is_channel_narrow(ch_info))
5570                         scan_ch->type |= (1 << 7);
5571
5572                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
5573                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
5574
5575                 /* Set power levels to defaults */
5576                 scan_ch->tpc.dsp_atten = 110;
5577                 /* scan_pwr_info->tpc.dsp_atten; */
5578
5579                 /*scan_pwr_info->tpc.tx_gain; */
5580                 if (phymode == MODE_IEEE80211A)
5581                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
5582                 else {
5583                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
5584                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
5585                          * power level
5586                          scan_ch->tpc.tx_gain = ((1<<5) | (2 << 3)) | 3;
5587                          */
5588                 }
5589
5590                 IWL_DEBUG_SCAN("Scanning %d [%s %d]\n",
5591                                scan_ch->channel,
5592                                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
5593                                (scan_ch->type & 1) ?
5594                                active_dwell : passive_dwell);
5595
5596                 scan_ch++;
5597                 added++;
5598         }
5599
5600         IWL_DEBUG_SCAN("total channels to scan %d \n", added);
5601         return added;
5602 }
5603
5604 static void iwl_reset_channel_flag(struct iwl_priv *priv)
5605 {
5606         int i, j;
5607         for (i = 0; i < 3; i++) {
5608                 struct ieee80211_hw_mode *hw_mode = (void *)&priv->modes[i];
5609                 for (j = 0; j < hw_mode->num_channels; j++)
5610                         hw_mode->channels[j].flag = hw_mode->channels[j].val;
5611         }
5612 }
5613
5614 static void iwl_init_hw_rates(struct iwl_priv *priv,
5615                               struct ieee80211_rate *rates)
5616 {
5617         int i;
5618
5619         for (i = 0; i < IWL_RATE_COUNT; i++) {
5620                 rates[i].rate = iwl_rates[i].ieee * 5;
5621                 rates[i].val = i; /* Rate scaling will work on indexes */
5622                 rates[i].val2 = i;
5623                 rates[i].flags = IEEE80211_RATE_SUPPORTED;
5624                 /* Only OFDM have the bits-per-symbol set */
5625                 if ((i <= IWL_LAST_OFDM_RATE) && (i >= IWL_FIRST_OFDM_RATE))
5626                         rates[i].flags |= IEEE80211_RATE_OFDM;
5627                 else {
5628                         /*
5629                          * If CCK 1M then set rate flag to CCK else CCK_2
5630                          * which is CCK | PREAMBLE2
5631                          */
5632                         rates[i].flags |= (iwl_rates[i].plcp == 10) ?
5633                                 IEEE80211_RATE_CCK : IEEE80211_RATE_CCK_2;
5634                 }
5635
5636                 /* Set up which ones are basic rates... */
5637                 if (IWL_BASIC_RATES_MASK & (1 << i))
5638                         rates[i].flags |= IEEE80211_RATE_BASIC;
5639         }
5640
5641         iwl4965_init_hw_rates(priv, rates);
5642 }
5643
5644 /**
5645  * iwl_init_geos - Initialize mac80211's geo/channel info based from eeprom
5646  */
5647 static int iwl_init_geos(struct iwl_priv *priv)
5648 {
5649         struct iwl_channel_info *ch;
5650         struct ieee80211_hw_mode *modes;
5651         struct ieee80211_channel *channels;
5652         struct ieee80211_channel *geo_ch;
5653         struct ieee80211_rate *rates;
5654         int i = 0;
5655         enum {
5656                 A = 0,
5657                 B = 1,
5658                 G = 2,
5659                 A_11N = 3,
5660                 G_11N = 4,
5661         };
5662         int mode_count = 5;
5663
5664         if (priv->modes) {
5665                 IWL_DEBUG_INFO("Geography modes already initialized.\n");
5666                 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
5667                 return 0;
5668         }
5669
5670         modes = kzalloc(sizeof(struct ieee80211_hw_mode) * mode_count,
5671                         GFP_KERNEL);
5672         if (!modes)
5673                 return -ENOMEM;
5674
5675         channels = kzalloc(sizeof(struct ieee80211_channel) *
5676                            priv->channel_count, GFP_KERNEL);
5677         if (!channels) {
5678                 kfree(modes);
5679                 return -ENOMEM;
5680         }
5681
5682         rates = kzalloc((sizeof(struct ieee80211_rate) * (IWL_MAX_RATES + 1)),
5683                         GFP_KERNEL);
5684         if (!rates) {
5685                 kfree(modes);
5686                 kfree(channels);
5687                 return -ENOMEM;
5688         }
5689
5690         /* 0 = 802.11a
5691          * 1 = 802.11b
5692          * 2 = 802.11g
5693          */
5694
5695         /* 5.2GHz channels start after the 2.4GHz channels */
5696         modes[A].mode = MODE_IEEE80211A;
5697         modes[A].channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)];
5698         modes[A].rates = rates;
5699         modes[A].num_rates = 8; /* just OFDM */
5700         modes[A].rates = &rates[4];
5701         modes[A].num_channels = 0;
5702
5703         modes[B].mode = MODE_IEEE80211B;
5704         modes[B].channels = channels;
5705         modes[B].rates = rates;
5706         modes[B].num_rates = 4; /* just CCK */
5707         modes[B].num_channels = 0;
5708
5709         modes[G].mode = MODE_IEEE80211G;
5710         modes[G].channels = channels;
5711         modes[G].rates = rates;
5712         modes[G].num_rates = 12;        /* OFDM & CCK */
5713         modes[G].num_channels = 0;
5714
5715         modes[G_11N].mode = MODE_IEEE80211G;
5716         modes[G_11N].channels = channels;
5717         modes[G_11N].num_rates = 13;        /* OFDM & CCK */
5718         modes[G_11N].rates = rates;
5719         modes[G_11N].num_channels = 0;
5720
5721         modes[A_11N].mode = MODE_IEEE80211A;
5722         modes[A_11N].channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)];
5723         modes[A_11N].rates = &rates[4];
5724         modes[A_11N].num_rates = 9; /* just OFDM */
5725         modes[A_11N].num_channels = 0;
5726
5727         priv->ieee_channels = channels;
5728         priv->ieee_rates = rates;
5729
5730         iwl_init_hw_rates(priv, rates);
5731
5732         for (i = 0, geo_ch = channels; i < priv->channel_count; i++) {
5733                 ch = &priv->channel_info[i];
5734
5735                 if (!is_channel_valid(ch)) {
5736                         IWL_DEBUG_INFO("Channel %d [%sGHz] is restricted -- "
5737                                     "skipping.\n",
5738                                     ch->channel, is_channel_a_band(ch) ?
5739                                     "5.2" : "2.4");
5740                         continue;
5741                 }
5742
5743                 if (is_channel_a_band(ch)) {
5744                         geo_ch = &modes[A].channels[modes[A].num_channels++];
5745                         modes[A_11N].num_channels++;
5746                 } else {
5747                         geo_ch = &modes[B].channels[modes[B].num_channels++];
5748                         modes[G].num_channels++;
5749                         modes[G_11N].num_channels++;
5750                 }
5751
5752                 geo_ch->freq = ieee80211chan2mhz(ch->channel);
5753                 geo_ch->chan = ch->channel;
5754                 geo_ch->power_level = ch->max_power_avg;
5755                 geo_ch->antenna_max = 0xff;
5756
5757                 if (is_channel_valid(ch)) {
5758                         geo_ch->flag = IEEE80211_CHAN_W_SCAN;
5759                         if (ch->flags & EEPROM_CHANNEL_IBSS)
5760                                 geo_ch->flag |= IEEE80211_CHAN_W_IBSS;
5761
5762                         if (ch->flags & EEPROM_CHANNEL_ACTIVE)
5763                                 geo_ch->flag |= IEEE80211_CHAN_W_ACTIVE_SCAN;
5764
5765                         if (ch->flags & EEPROM_CHANNEL_RADAR)
5766                                 geo_ch->flag |= IEEE80211_CHAN_W_RADAR_DETECT;
5767
5768                         if (ch->max_power_avg > priv->max_channel_txpower_limit)
5769                                 priv->max_channel_txpower_limit =
5770                                     ch->max_power_avg;
5771                 }
5772
5773                 geo_ch->val = geo_ch->flag;
5774         }
5775
5776         if ((modes[A].num_channels == 0) && priv->is_abg) {
5777                 printk(KERN_INFO DRV_NAME
5778                        ": Incorrectly detected BG card as ABG.  Please send "
5779                        "your PCI ID 0x%04X:0x%04X to maintainer.\n",
5780                        priv->pci_dev->device, priv->pci_dev->subsystem_device);
5781                 priv->is_abg = 0;
5782         }
5783
5784         printk(KERN_INFO DRV_NAME
5785                ": Tunable channels: %d 802.11bg, %d 802.11a channels\n",
5786                modes[G].num_channels, modes[A].num_channels);
5787
5788         /*
5789          * NOTE:  We register these in preference of order -- the
5790          * stack doesn't currently (as of 7.0.6 / Apr 24 '07) pick
5791          * a phymode based on rates or AP capabilities but seems to
5792          * configure it purely on if the channel being configured
5793          * is supported by a mode -- and the first match is taken
5794          */
5795
5796         if (modes[G].num_channels)
5797                 ieee80211_register_hwmode(priv->hw, &modes[G]);
5798         if (modes[B].num_channels)
5799                 ieee80211_register_hwmode(priv->hw, &modes[B]);
5800         if (modes[A].num_channels)
5801                 ieee80211_register_hwmode(priv->hw, &modes[A]);
5802
5803         priv->modes = modes;
5804         set_bit(STATUS_GEO_CONFIGURED, &priv->status);
5805
5806         return 0;
5807 }
5808
5809 /******************************************************************************
5810  *
5811  * uCode download functions
5812  *
5813  ******************************************************************************/
5814
5815 static void iwl_dealloc_ucode_pci(struct iwl_priv *priv)
5816 {
5817         if (priv->ucode_code.v_addr != NULL) {
5818                 pci_free_consistent(priv->pci_dev,
5819                                     priv->ucode_code.len,
5820                                     priv->ucode_code.v_addr,
5821                                     priv->ucode_code.p_addr);
5822                 priv->ucode_code.v_addr = NULL;
5823         }
5824         if (priv->ucode_data.v_addr != NULL) {
5825                 pci_free_consistent(priv->pci_dev,
5826                                     priv->ucode_data.len,
5827                                     priv->ucode_data.v_addr,
5828                                     priv->ucode_data.p_addr);
5829                 priv->ucode_data.v_addr = NULL;
5830         }
5831         if (priv->ucode_data_backup.v_addr != NULL) {
5832                 pci_free_consistent(priv->pci_dev,
5833                                     priv->ucode_data_backup.len,
5834                                     priv->ucode_data_backup.v_addr,
5835                                     priv->ucode_data_backup.p_addr);
5836                 priv->ucode_data_backup.v_addr = NULL;
5837         }
5838         if (priv->ucode_init.v_addr != NULL) {
5839                 pci_free_consistent(priv->pci_dev,
5840                                     priv->ucode_init.len,
5841                                     priv->ucode_init.v_addr,
5842                                     priv->ucode_init.p_addr);
5843                 priv->ucode_init.v_addr = NULL;
5844         }
5845         if (priv->ucode_init_data.v_addr != NULL) {
5846                 pci_free_consistent(priv->pci_dev,
5847                                     priv->ucode_init_data.len,
5848                                     priv->ucode_init_data.v_addr,
5849                                     priv->ucode_init_data.p_addr);
5850                 priv->ucode_init_data.v_addr = NULL;
5851         }
5852         if (priv->ucode_boot.v_addr != NULL) {
5853                 pci_free_consistent(priv->pci_dev,
5854                                     priv->ucode_boot.len,
5855                                     priv->ucode_boot.v_addr,
5856                                     priv->ucode_boot.p_addr);
5857                 priv->ucode_boot.v_addr = NULL;
5858         }
5859 }
5860
5861 /**
5862  * iwl_verify_inst_full - verify runtime uCode image in card vs. host,
5863  *     looking at all data.
5864  */
5865 static int iwl_verify_inst_full(struct iwl_priv *priv, __le32 * image, u32 len)
5866 {
5867         u32 val;
5868         u32 save_len = len;
5869         int rc = 0;
5870         u32 errcnt;
5871
5872         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
5873
5874         rc = iwl_grab_restricted_access(priv);
5875         if (rc)
5876                 return rc;
5877
5878         iwl_write_restricted(priv, HBUS_TARG_MEM_RADDR, RTC_INST_LOWER_BOUND);
5879
5880         errcnt = 0;
5881         for (; len > 0; len -= sizeof(u32), image++) {
5882                 /* read data comes through single port, auto-incr addr */
5883                 /* NOTE: Use the debugless read so we don't flood kernel log
5884                  * if IWL_DL_IO is set */
5885                 val = _iwl_read_restricted(priv, HBUS_TARG_MEM_RDAT);
5886                 if (val != le32_to_cpu(*image)) {
5887                         IWL_ERROR("uCode INST section is invalid at "
5888                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
5889                                   save_len - len, val, le32_to_cpu(*image));
5890                         rc = -EIO;
5891                         errcnt++;
5892                         if (errcnt >= 20)
5893                                 break;
5894                 }
5895         }
5896
5897         iwl_release_restricted_access(priv);
5898
5899         if (!errcnt)
5900                 IWL_DEBUG_INFO
5901                     ("ucode image in INSTRUCTION memory is good\n");
5902
5903         return rc;
5904 }
5905
5906
5907 /**
5908  * iwl_verify_inst_sparse - verify runtime uCode image in card vs. host,
5909  *   using sample data 100 bytes apart.  If these sample points are good,
5910  *   it's a pretty good bet that everything between them is good, too.
5911  */
5912 static int iwl_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
5913 {
5914         u32 val;
5915         int rc = 0;
5916         u32 errcnt = 0;
5917         u32 i;
5918
5919         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
5920
5921         rc = iwl_grab_restricted_access(priv);
5922         if (rc)
5923                 return rc;
5924
5925         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
5926                 /* read data comes through single port, auto-incr addr */
5927                 /* NOTE: Use the debugless read so we don't flood kernel log
5928                  * if IWL_DL_IO is set */
5929                 iwl_write_restricted(priv, HBUS_TARG_MEM_RADDR,
5930                         i + RTC_INST_LOWER_BOUND);
5931                 val = _iwl_read_restricted(priv, HBUS_TARG_MEM_RDAT);
5932                 if (val != le32_to_cpu(*image)) {
5933 #if 0 /* Enable this if you want to see details */
5934                         IWL_ERROR("uCode INST section is invalid at "
5935                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
5936                                   i, val, *image);
5937 #endif
5938                         rc = -EIO;
5939                         errcnt++;
5940                         if (errcnt >= 3)
5941                                 break;
5942                 }
5943         }
5944
5945         iwl_release_restricted_access(priv);
5946
5947         return rc;
5948 }
5949
5950
5951 /**
5952  * iwl_verify_ucode - determine which instruction image is in SRAM,
5953  *    and verify its contents
5954  */
5955 static int iwl_verify_ucode(struct iwl_priv *priv)
5956 {
5957         __le32 *image;
5958         u32 len;
5959         int rc = 0;
5960
5961         /* Try bootstrap */
5962         image = (__le32 *)priv->ucode_boot.v_addr;
5963         len = priv->ucode_boot.len;
5964         rc = iwl_verify_inst_sparse(priv, image, len);
5965         if (rc == 0) {
5966                 IWL_DEBUG_INFO("Bootstrap uCode is good in inst SRAM\n");
5967                 return 0;
5968         }
5969
5970         /* Try initialize */
5971         image = (__le32 *)priv->ucode_init.v_addr;
5972         len = priv->ucode_init.len;
5973         rc = iwl_verify_inst_sparse(priv, image, len);
5974         if (rc == 0) {
5975                 IWL_DEBUG_INFO("Initialize uCode is good in inst SRAM\n");
5976                 return 0;
5977         }
5978
5979         /* Try runtime/protocol */
5980         image = (__le32 *)priv->ucode_code.v_addr;
5981         len = priv->ucode_code.len;
5982         rc = iwl_verify_inst_sparse(priv, image, len);
5983         if (rc == 0) {
5984                 IWL_DEBUG_INFO("Runtime uCode is good in inst SRAM\n");
5985                 return 0;
5986         }
5987
5988         IWL_ERROR("NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
5989
5990         /* Show first several data entries in instruction SRAM.
5991          * Selection of bootstrap image is arbitrary. */
5992         image = (__le32 *)priv->ucode_boot.v_addr;
5993         len = priv->ucode_boot.len;
5994         rc = iwl_verify_inst_full(priv, image, len);
5995
5996         return rc;
5997 }
5998
5999
6000 /* check contents of special bootstrap uCode SRAM */
6001 static int iwl_verify_bsm(struct iwl_priv *priv)
6002 {
6003         __le32 *image = priv->ucode_boot.v_addr;
6004         u32 len = priv->ucode_boot.len;
6005         u32 reg;
6006         u32 val;
6007
6008         IWL_DEBUG_INFO("Begin verify bsm\n");
6009
6010         /* verify BSM SRAM contents */
6011         val = iwl_read_restricted_reg(priv, BSM_WR_DWCOUNT_REG);
6012         for (reg = BSM_SRAM_LOWER_BOUND;
6013              reg < BSM_SRAM_LOWER_BOUND + len;
6014              reg += sizeof(u32), image ++) {
6015                 val = iwl_read_restricted_reg(priv, reg);
6016                 if (val != le32_to_cpu(*image)) {
6017                         IWL_ERROR("BSM uCode verification failed at "
6018                                   "addr 0x%08X+%u (of %u), is 0x%x, s/b 0x%x\n",
6019                                   BSM_SRAM_LOWER_BOUND,
6020                                   reg - BSM_SRAM_LOWER_BOUND, len,
6021                                   val, le32_to_cpu(*image));
6022                         return -EIO;
6023                 }
6024         }
6025
6026         IWL_DEBUG_INFO("BSM bootstrap uCode image OK\n");
6027
6028         return 0;
6029 }
6030
6031 /**
6032  * iwl_load_bsm - Load bootstrap instructions
6033  *
6034  * BSM operation:
6035  *
6036  * The Bootstrap State Machine (BSM) stores a short bootstrap uCode program
6037  * in special SRAM that does not power down during RFKILL.  When powering back
6038  * up after power-saving sleeps (or during initial uCode load), the BSM loads
6039  * the bootstrap program into the on-board processor, and starts it.
6040  *
6041  * The bootstrap program loads (via DMA) instructions and data for a new
6042  * program from host DRAM locations indicated by the host driver in the
6043  * BSM_DRAM_* registers.  Once the new program is loaded, it starts
6044  * automatically.
6045  *
6046  * When initializing the NIC, the host driver points the BSM to the
6047  * "initialize" uCode image.  This uCode sets up some internal data, then
6048  * notifies host via "initialize alive" that it is complete.
6049  *
6050  * The host then replaces the BSM_DRAM_* pointer values to point to the
6051  * normal runtime uCode instructions and a backup uCode data cache buffer
6052  * (filled initially with starting data values for the on-board processor),
6053  * then triggers the "initialize" uCode to load and launch the runtime uCode,
6054  * which begins normal operation.
6055  *
6056  * When doing a power-save shutdown, runtime uCode saves data SRAM into
6057  * the backup data cache in DRAM before SRAM is powered down.
6058  *
6059  * When powering back up, the BSM loads the bootstrap program.  This reloads
6060  * the runtime uCode instructions and the backup data cache into SRAM,
6061  * and re-launches the runtime uCode from where it left off.
6062  */
6063 static int iwl_load_bsm(struct iwl_priv *priv)
6064 {
6065         __le32 *image = priv->ucode_boot.v_addr;
6066         u32 len = priv->ucode_boot.len;
6067         dma_addr_t pinst;
6068         dma_addr_t pdata;
6069         u32 inst_len;
6070         u32 data_len;
6071         int rc;
6072         int i;
6073         u32 done;
6074         u32 reg_offset;
6075
6076         IWL_DEBUG_INFO("Begin load bsm\n");
6077
6078         /* make sure bootstrap program is no larger than BSM's SRAM size */
6079         if (len > IWL_MAX_BSM_SIZE)
6080                 return -EINVAL;
6081
6082         /* Tell bootstrap uCode where to find the "Initialize" uCode
6083          *   in host DRAM ... bits 31:0 for 3945, bits 35:4 for 4965.
6084          * NOTE:  iwl_initialize_alive_start() will replace these values,
6085          *        after the "initialize" uCode has run, to point to
6086          *        runtime/protocol instructions and backup data cache. */
6087         pinst = priv->ucode_init.p_addr >> 4;
6088         pdata = priv->ucode_init_data.p_addr >> 4;
6089         inst_len = priv->ucode_init.len;
6090         data_len = priv->ucode_init_data.len;
6091
6092         rc = iwl_grab_restricted_access(priv);
6093         if (rc)
6094                 return rc;
6095
6096         iwl_write_restricted_reg(priv, BSM_DRAM_INST_PTR_REG, pinst);
6097         iwl_write_restricted_reg(priv, BSM_DRAM_DATA_PTR_REG, pdata);
6098         iwl_write_restricted_reg(priv, BSM_DRAM_INST_BYTECOUNT_REG, inst_len);
6099         iwl_write_restricted_reg(priv, BSM_DRAM_DATA_BYTECOUNT_REG, data_len);
6100
6101         /* Fill BSM memory with bootstrap instructions */
6102         for (reg_offset = BSM_SRAM_LOWER_BOUND;
6103              reg_offset < BSM_SRAM_LOWER_BOUND + len;
6104              reg_offset += sizeof(u32), image++)
6105                 _iwl_write_restricted_reg(priv, reg_offset,
6106                                           le32_to_cpu(*image));
6107
6108         rc = iwl_verify_bsm(priv);
6109         if (rc) {
6110                 iwl_release_restricted_access(priv);
6111                 return rc;
6112         }
6113
6114         /* Tell BSM to copy from BSM SRAM into instruction SRAM, when asked */
6115         iwl_write_restricted_reg(priv, BSM_WR_MEM_SRC_REG, 0x0);
6116         iwl_write_restricted_reg(priv, BSM_WR_MEM_DST_REG,
6117                                  RTC_INST_LOWER_BOUND);
6118         iwl_write_restricted_reg(priv, BSM_WR_DWCOUNT_REG, len / sizeof(u32));
6119
6120         /* Load bootstrap code into instruction SRAM now,
6121          *   to prepare to load "initialize" uCode */
6122         iwl_write_restricted_reg(priv, BSM_WR_CTRL_REG,
6123                 BSM_WR_CTRL_REG_BIT_START);
6124
6125         /* Wait for load of bootstrap uCode to finish */
6126         for (i = 0; i < 100; i++) {
6127                 done = iwl_read_restricted_reg(priv, BSM_WR_CTRL_REG);
6128                 if (!(done & BSM_WR_CTRL_REG_BIT_START))
6129                         break;
6130                 udelay(10);
6131         }
6132         if (i < 100)
6133                 IWL_DEBUG_INFO("BSM write complete, poll %d iterations\n", i);
6134         else {
6135                 IWL_ERROR("BSM write did not complete!\n");
6136                 return -EIO;
6137         }
6138
6139         /* Enable future boot loads whenever power management unit triggers it
6140          *   (e.g. when powering back up after power-save shutdown) */
6141         iwl_write_restricted_reg(priv, BSM_WR_CTRL_REG,
6142                 BSM_WR_CTRL_REG_BIT_START_EN);
6143
6144         iwl_release_restricted_access(priv);
6145
6146         return 0;
6147 }
6148
6149 static void iwl_nic_start(struct iwl_priv *priv)
6150 {
6151         /* Remove all resets to allow NIC to operate */
6152         iwl_write32(priv, CSR_RESET, 0);
6153 }
6154
6155 /**
6156  * iwl_read_ucode - Read uCode images from disk file.
6157  *
6158  * Copy into buffers for card to fetch via bus-mastering
6159  */
6160 static int iwl_read_ucode(struct iwl_priv *priv)
6161 {
6162         struct iwl_ucode *ucode;
6163         int rc = 0;
6164         const struct firmware *ucode_raw;
6165         const char *name = "iwlwifi-4965" IWL4965_UCODE_API ".ucode";
6166         u8 *src;
6167         size_t len;
6168         u32 ver, inst_size, data_size, init_size, init_data_size, boot_size;
6169
6170         /* Ask kernel firmware_class module to get the boot firmware off disk.
6171          * request_firmware() is synchronous, file is in memory on return. */
6172         rc = request_firmware(&ucode_raw, name, &priv->pci_dev->dev);
6173         if (rc < 0) {
6174                 IWL_ERROR("%s firmware file req failed: Reason %d\n", name, rc);
6175                 goto error;
6176         }
6177
6178         IWL_DEBUG_INFO("Got firmware '%s' file (%zd bytes) from disk\n",
6179                        name, ucode_raw->size);
6180
6181         /* Make sure that we got at least our header! */
6182         if (ucode_raw->size < sizeof(*ucode)) {
6183                 IWL_ERROR("File size way too small!\n");
6184                 rc = -EINVAL;
6185                 goto err_release;
6186         }
6187
6188         /* Data from ucode file:  header followed by uCode images */
6189         ucode = (void *)ucode_raw->data;
6190
6191         ver = le32_to_cpu(ucode->ver);
6192         inst_size = le32_to_cpu(ucode->inst_size);
6193         data_size = le32_to_cpu(ucode->data_size);
6194         init_size = le32_to_cpu(ucode->init_size);
6195         init_data_size = le32_to_cpu(ucode->init_data_size);
6196         boot_size = le32_to_cpu(ucode->boot_size);
6197
6198         IWL_DEBUG_INFO("f/w package hdr ucode version = 0x%x\n", ver);
6199         IWL_DEBUG_INFO("f/w package hdr runtime inst size = %u\n",
6200                        inst_size);
6201         IWL_DEBUG_INFO("f/w package hdr runtime data size = %u\n",
6202                        data_size);
6203         IWL_DEBUG_INFO("f/w package hdr init inst size = %u\n",
6204                        init_size);
6205         IWL_DEBUG_INFO("f/w package hdr init data size = %u\n",
6206                        init_data_size);
6207         IWL_DEBUG_INFO("f/w package hdr boot inst size = %u\n",
6208                        boot_size);
6209
6210         /* Verify size of file vs. image size info in file's header */
6211         if (ucode_raw->size < sizeof(*ucode) +
6212                 inst_size + data_size + init_size +
6213                 init_data_size + boot_size) {
6214
6215                 IWL_DEBUG_INFO("uCode file size %d too small\n",
6216                                (int)ucode_raw->size);
6217                 rc = -EINVAL;
6218                 goto err_release;
6219         }
6220
6221         /* Verify that uCode images will fit in card's SRAM */
6222         if (inst_size > IWL_MAX_INST_SIZE) {
6223                 IWL_DEBUG_INFO("uCode instr len %d too large to fit in card\n",
6224                                (int)inst_size);
6225                 rc = -EINVAL;
6226                 goto err_release;
6227         }
6228
6229         if (data_size > IWL_MAX_DATA_SIZE) {
6230                 IWL_DEBUG_INFO("uCode data len %d too large to fit in card\n",
6231                                (int)data_size);
6232                 rc = -EINVAL;
6233                 goto err_release;
6234         }
6235         if (init_size > IWL_MAX_INST_SIZE) {
6236                 IWL_DEBUG_INFO
6237                     ("uCode init instr len %d too large to fit in card\n",
6238                      (int)init_size);
6239                 rc = -EINVAL;
6240                 goto err_release;
6241         }
6242         if (init_data_size > IWL_MAX_DATA_SIZE) {
6243                 IWL_DEBUG_INFO
6244                     ("uCode init data len %d too large to fit in card\n",
6245                      (int)init_data_size);
6246                 rc = -EINVAL;
6247                 goto err_release;
6248         }
6249         if (boot_size > IWL_MAX_BSM_SIZE) {
6250                 IWL_DEBUG_INFO
6251                     ("uCode boot instr len %d too large to fit in bsm\n",
6252                      (int)boot_size);
6253                 rc = -EINVAL;
6254                 goto err_release;
6255         }
6256
6257         /* Allocate ucode buffers for card's bus-master loading ... */
6258
6259         /* Runtime instructions and 2 copies of data:
6260          * 1) unmodified from disk
6261          * 2) backup cache for save/restore during power-downs */
6262         priv->ucode_code.len = inst_size;
6263         priv->ucode_code.v_addr =
6264             pci_alloc_consistent(priv->pci_dev,
6265                                  priv->ucode_code.len,
6266                                  &(priv->ucode_code.p_addr));
6267
6268         priv->ucode_data.len = data_size;
6269         priv->ucode_data.v_addr =
6270             pci_alloc_consistent(priv->pci_dev,
6271                                  priv->ucode_data.len,
6272                                  &(priv->ucode_data.p_addr));
6273
6274         priv->ucode_data_backup.len = data_size;
6275         priv->ucode_data_backup.v_addr =
6276             pci_alloc_consistent(priv->pci_dev,
6277                                  priv->ucode_data_backup.len,
6278                                  &(priv->ucode_data_backup.p_addr));
6279
6280
6281         /* Initialization instructions and data */
6282         priv->ucode_init.len = init_size;
6283         priv->ucode_init.v_addr =
6284             pci_alloc_consistent(priv->pci_dev,
6285                                  priv->ucode_init.len,
6286                                  &(priv->ucode_init.p_addr));
6287
6288         priv->ucode_init_data.len = init_data_size;
6289         priv->ucode_init_data.v_addr =
6290             pci_alloc_consistent(priv->pci_dev,
6291                                  priv->ucode_init_data.len,
6292                                  &(priv->ucode_init_data.p_addr));
6293
6294         /* Bootstrap (instructions only, no data) */
6295         priv->ucode_boot.len = boot_size;
6296         priv->ucode_boot.v_addr =
6297             pci_alloc_consistent(priv->pci_dev,
6298                                  priv->ucode_boot.len,
6299                                  &(priv->ucode_boot.p_addr));
6300
6301         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
6302             !priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr ||
6303             !priv->ucode_boot.v_addr || !priv->ucode_data_backup.v_addr)
6304                 goto err_pci_alloc;
6305
6306         /* Copy images into buffers for card's bus-master reads ... */
6307
6308         /* Runtime instructions (first block of data in file) */
6309         src = &ucode->data[0];
6310         len = priv->ucode_code.len;
6311         IWL_DEBUG_INFO("Copying (but not loading) uCode instr len %d\n",
6312                        (int)len);
6313         memcpy(priv->ucode_code.v_addr, src, len);
6314         IWL_DEBUG_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
6315                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
6316
6317         /* Runtime data (2nd block)
6318          * NOTE:  Copy into backup buffer will be done in iwl_up()  */
6319         src = &ucode->data[inst_size];
6320         len = priv->ucode_data.len;
6321         IWL_DEBUG_INFO("Copying (but not loading) uCode data len %d\n",
6322                        (int)len);
6323         memcpy(priv->ucode_data.v_addr, src, len);
6324         memcpy(priv->ucode_data_backup.v_addr, src, len);
6325
6326         /* Initialization instructions (3rd block) */
6327         if (init_size) {
6328                 src = &ucode->data[inst_size + data_size];
6329                 len = priv->ucode_init.len;
6330                 IWL_DEBUG_INFO("Copying (but not loading) init instr len %d\n",
6331                                (int)len);
6332                 memcpy(priv->ucode_init.v_addr, src, len);
6333         }
6334
6335         /* Initialization data (4th block) */
6336         if (init_data_size) {
6337                 src = &ucode->data[inst_size + data_size + init_size];
6338                 len = priv->ucode_init_data.len;
6339                 IWL_DEBUG_INFO("Copying (but not loading) init data len %d\n",
6340                                (int)len);
6341                 memcpy(priv->ucode_init_data.v_addr, src, len);
6342         }
6343
6344         /* Bootstrap instructions (5th block) */
6345         src = &ucode->data[inst_size + data_size + init_size + init_data_size];
6346         len = priv->ucode_boot.len;
6347         IWL_DEBUG_INFO("Copying (but not loading) boot instr len %d\n",
6348                        (int)len);
6349         memcpy(priv->ucode_boot.v_addr, src, len);
6350
6351         /* We have our copies now, allow OS release its copies */
6352         release_firmware(ucode_raw);
6353         return 0;
6354
6355  err_pci_alloc:
6356         IWL_ERROR("failed to allocate pci memory\n");
6357         rc = -ENOMEM;
6358         iwl_dealloc_ucode_pci(priv);
6359
6360  err_release:
6361         release_firmware(ucode_raw);
6362
6363  error:
6364         return rc;
6365 }
6366
6367
6368 /**
6369  * iwl_set_ucode_ptrs - Set uCode address location
6370  *
6371  * Tell initialization uCode where to find runtime uCode.
6372  *
6373  * BSM registers initially contain pointers to initialization uCode.
6374  * We need to replace them to load runtime uCode inst and data,
6375  * and to save runtime data when powering down.
6376  */
6377 static int iwl_set_ucode_ptrs(struct iwl_priv *priv)
6378 {
6379         dma_addr_t pinst;
6380         dma_addr_t pdata;
6381         int rc = 0;
6382         unsigned long flags;
6383
6384         /* bits 35:4 for 4965 */
6385         pinst = priv->ucode_code.p_addr >> 4;
6386         pdata = priv->ucode_data_backup.p_addr >> 4;
6387
6388         spin_lock_irqsave(&priv->lock, flags);
6389         rc = iwl_grab_restricted_access(priv);
6390         if (rc) {
6391                 spin_unlock_irqrestore(&priv->lock, flags);
6392                 return rc;
6393         }
6394
6395         /* Tell bootstrap uCode where to find image to load */
6396         iwl_write_restricted_reg(priv, BSM_DRAM_INST_PTR_REG, pinst);
6397         iwl_write_restricted_reg(priv, BSM_DRAM_DATA_PTR_REG, pdata);
6398         iwl_write_restricted_reg(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
6399                                  priv->ucode_data.len);
6400
6401         /* Inst bytecount must be last to set up, bit 31 signals uCode
6402          *   that all new ptr/size info is in place */
6403         iwl_write_restricted_reg(priv, BSM_DRAM_INST_BYTECOUNT_REG,
6404                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
6405
6406         iwl_release_restricted_access(priv);
6407
6408         spin_unlock_irqrestore(&priv->lock, flags);
6409
6410         IWL_DEBUG_INFO("Runtime uCode pointers are set.\n");
6411
6412         return rc;
6413 }
6414
6415 /**
6416  * iwl_init_alive_start - Called after REPLY_ALIVE notification receieved
6417  *
6418  * Called after REPLY_ALIVE notification received from "initialize" uCode.
6419  *
6420  * The 4965 "initialize" ALIVE reply contains calibration data for:
6421  *   Voltage, temperature, and MIMO tx gain correction, now stored in priv
6422  *   (3945 does not contain this data).
6423  *
6424  * Tell "initialize" uCode to go ahead and load the runtime uCode.
6425 */
6426 static void iwl_init_alive_start(struct iwl_priv *priv)
6427 {
6428         /* Check alive response for "valid" sign from uCode */
6429         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
6430                 /* We had an error bringing up the hardware, so take it
6431                  * all the way back down so we can try again */
6432                 IWL_DEBUG_INFO("Initialize Alive failed.\n");
6433                 goto restart;
6434         }
6435
6436         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
6437          * This is a paranoid check, because we would not have gotten the
6438          * "initialize" alive if code weren't properly loaded.  */
6439         if (iwl_verify_ucode(priv)) {
6440                 /* Runtime instruction load was bad;
6441                  * take it all the way back down so we can try again */
6442                 IWL_DEBUG_INFO("Bad \"initialize\" uCode load.\n");
6443                 goto restart;
6444         }
6445
6446         /* Calculate temperature */
6447         priv->temperature = iwl4965_get_temperature(priv);
6448
6449         /* Send pointers to protocol/runtime uCode image ... init code will
6450          * load and launch runtime uCode, which will send us another "Alive"
6451          * notification. */
6452         IWL_DEBUG_INFO("Initialization Alive received.\n");
6453         if (iwl_set_ucode_ptrs(priv)) {
6454                 /* Runtime instruction load won't happen;
6455                  * take it all the way back down so we can try again */
6456                 IWL_DEBUG_INFO("Couldn't set up uCode pointers.\n");
6457                 goto restart;
6458         }
6459         return;
6460
6461  restart:
6462         queue_work(priv->workqueue, &priv->restart);
6463 }
6464
6465
6466 /**
6467  * iwl_alive_start - called after REPLY_ALIVE notification received
6468  *                   from protocol/runtime uCode (initialization uCode's
6469  *                   Alive gets handled by iwl_init_alive_start()).
6470  */
6471 static void iwl_alive_start(struct iwl_priv *priv)
6472 {
6473         int rc = 0;
6474
6475         IWL_DEBUG_INFO("Runtime Alive received.\n");
6476
6477         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
6478                 /* We had an error bringing up the hardware, so take it
6479                  * all the way back down so we can try again */
6480                 IWL_DEBUG_INFO("Alive failed.\n");
6481                 goto restart;
6482         }
6483
6484         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
6485          * This is a paranoid check, because we would not have gotten the
6486          * "runtime" alive if code weren't properly loaded.  */
6487         if (iwl_verify_ucode(priv)) {
6488                 /* Runtime instruction load was bad;
6489                  * take it all the way back down so we can try again */
6490                 IWL_DEBUG_INFO("Bad runtime uCode load.\n");
6491                 goto restart;
6492         }
6493
6494         iwl_clear_stations_table(priv);
6495
6496         rc = iwl4965_alive_notify(priv);
6497         if (rc) {
6498                 IWL_WARNING("Could not complete ALIVE transition [ntf]: %d\n",
6499                             rc);
6500                 goto restart;
6501         }
6502
6503         /* After the ALIVE response, we can process host commands */
6504         set_bit(STATUS_ALIVE, &priv->status);
6505
6506         /* Clear out the uCode error bit if it is set */
6507         clear_bit(STATUS_FW_ERROR, &priv->status);
6508
6509         rc = iwl_init_channel_map(priv);
6510         if (rc) {
6511                 IWL_ERROR("initializing regulatory failed: %d\n", rc);
6512                 return;
6513         }
6514
6515         iwl_init_geos(priv);
6516
6517         if (iwl_is_rfkill(priv))
6518                 return;
6519
6520         if (!priv->mac80211_registered) {
6521                 /* Unlock so any user space entry points can call back into
6522                  * the driver without a deadlock... */
6523                 mutex_unlock(&priv->mutex);
6524                 iwl_rate_control_register(priv->hw);
6525                 rc = ieee80211_register_hw(priv->hw);
6526                 priv->hw->conf.beacon_int = 100;
6527                 mutex_lock(&priv->mutex);
6528
6529                 if (rc) {
6530                         IWL_ERROR("Failed to register network "
6531                                   "device (error %d)\n", rc);
6532                         return;
6533                 }
6534
6535                 priv->mac80211_registered = 1;
6536
6537                 iwl_reset_channel_flag(priv);
6538         } else
6539                 ieee80211_start_queues(priv->hw);
6540
6541         priv->active_rate = priv->rates_mask;
6542         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
6543
6544         iwl_send_power_mode(priv, IWL_POWER_LEVEL(priv->power_mode));
6545
6546         if (iwl_is_associated(priv)) {
6547                 struct iwl_rxon_cmd *active_rxon =
6548                                 (struct iwl_rxon_cmd *)(&priv->active_rxon);
6549
6550                 memcpy(&priv->staging_rxon, &priv->active_rxon,
6551                        sizeof(priv->staging_rxon));
6552                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6553         } else {
6554                 /* Initialize our rx_config data */
6555                 iwl_connection_init_rx_config(priv);
6556                 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
6557         }
6558
6559         /* Configure BT coexistence */
6560         iwl_send_bt_config(priv);
6561
6562         /* Configure the adapter for unassociated operation */
6563         iwl_commit_rxon(priv);
6564
6565         /* At this point, the NIC is initialized and operational */
6566         priv->notif_missed_beacons = 0;
6567         set_bit(STATUS_READY, &priv->status);
6568
6569         iwl4965_rf_kill_ct_config(priv);
6570         IWL_DEBUG_INFO("ALIVE processing complete.\n");
6571
6572         if (priv->error_recovering)
6573                 iwl_error_recovery(priv);
6574
6575         return;
6576
6577  restart:
6578         queue_work(priv->workqueue, &priv->restart);
6579 }
6580
6581 static void iwl_cancel_deferred_work(struct iwl_priv *priv);
6582
6583 static void __iwl_down(struct iwl_priv *priv)
6584 {
6585         unsigned long flags;
6586         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
6587         struct ieee80211_conf *conf = NULL;
6588
6589         IWL_DEBUG_INFO(DRV_NAME " is going down\n");
6590
6591         conf = ieee80211_get_hw_conf(priv->hw);
6592
6593         if (!exit_pending)
6594                 set_bit(STATUS_EXIT_PENDING, &priv->status);
6595
6596         iwl_clear_stations_table(priv);
6597
6598         /* Unblock any waiting calls */
6599         wake_up_interruptible_all(&priv->wait_command_queue);
6600
6601         iwl_cancel_deferred_work(priv);
6602
6603         /* Wipe out the EXIT_PENDING status bit if we are not actually
6604          * exiting the module */
6605         if (!exit_pending)
6606                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
6607
6608         /* stop and reset the on-board processor */
6609         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
6610
6611         /* tell the device to stop sending interrupts */
6612         iwl_disable_interrupts(priv);
6613
6614         if (priv->mac80211_registered)
6615                 ieee80211_stop_queues(priv->hw);
6616
6617         /* If we have not previously called iwl_init() then
6618          * clear all bits but the RF Kill and SUSPEND bits and return */
6619         if (!iwl_is_init(priv)) {
6620                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
6621                                         STATUS_RF_KILL_HW |
6622                                test_bit(STATUS_RF_KILL_SW, &priv->status) <<
6623                                         STATUS_RF_KILL_SW |
6624                                test_bit(STATUS_IN_SUSPEND, &priv->status) <<
6625                                         STATUS_IN_SUSPEND;
6626                 goto exit;
6627         }
6628
6629         /* ...otherwise clear out all the status bits but the RF Kill and
6630          * SUSPEND bits and continue taking the NIC down. */
6631         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
6632                                 STATUS_RF_KILL_HW |
6633                         test_bit(STATUS_RF_KILL_SW, &priv->status) <<
6634                                 STATUS_RF_KILL_SW |
6635                         test_bit(STATUS_IN_SUSPEND, &priv->status) <<
6636                                 STATUS_IN_SUSPEND |
6637                         test_bit(STATUS_FW_ERROR, &priv->status) <<
6638                                 STATUS_FW_ERROR;
6639
6640         spin_lock_irqsave(&priv->lock, flags);
6641         iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
6642         spin_unlock_irqrestore(&priv->lock, flags);
6643
6644         iwl_hw_txq_ctx_stop(priv);
6645         iwl_hw_rxq_stop(priv);
6646
6647         spin_lock_irqsave(&priv->lock, flags);
6648         if (!iwl_grab_restricted_access(priv)) {
6649                 iwl_write_restricted_reg(priv, APMG_CLK_DIS_REG,
6650                                          APMG_CLK_VAL_DMA_CLK_RQT);
6651                 iwl_release_restricted_access(priv);
6652         }
6653         spin_unlock_irqrestore(&priv->lock, flags);
6654
6655         udelay(5);
6656
6657         iwl_hw_nic_stop_master(priv);
6658         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
6659         iwl_hw_nic_reset(priv);
6660
6661  exit:
6662         memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
6663
6664         if (priv->ibss_beacon)
6665                 dev_kfree_skb(priv->ibss_beacon);
6666         priv->ibss_beacon = NULL;
6667
6668         /* clear out any free frames */
6669         iwl_clear_free_frames(priv);
6670 }
6671
6672 static void iwl_down(struct iwl_priv *priv)
6673 {
6674         mutex_lock(&priv->mutex);
6675         __iwl_down(priv);
6676         mutex_unlock(&priv->mutex);
6677 }
6678
6679 #define MAX_HW_RESTARTS 5
6680
6681 static int __iwl_up(struct iwl_priv *priv)
6682 {
6683         DECLARE_MAC_BUF(mac);
6684         int rc, i;
6685         u32 hw_rf_kill = 0;
6686
6687         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
6688                 IWL_WARNING("Exit pending; will not bring the NIC up\n");
6689                 return -EIO;
6690         }
6691
6692         if (test_bit(STATUS_RF_KILL_SW, &priv->status)) {
6693                 IWL_WARNING("Radio disabled by SW RF kill (module "
6694                             "parameter)\n");
6695                 return 0;
6696         }
6697
6698         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
6699
6700         rc = iwl_hw_nic_init(priv);
6701         if (rc) {
6702                 IWL_ERROR("Unable to int nic\n");
6703                 return rc;
6704         }
6705
6706         /* make sure rfkill handshake bits are cleared */
6707         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6708         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
6709                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
6710
6711         /* clear (again), then enable host interrupts */
6712         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
6713         iwl_enable_interrupts(priv);
6714
6715         /* really make sure rfkill handshake bits are cleared */
6716         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6717         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
6718
6719         /* Copy original ucode data image from disk into backup cache.
6720          * This will be used to initialize the on-board processor's
6721          * data SRAM for a clean start when the runtime program first loads. */
6722         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
6723                         priv->ucode_data.len);
6724
6725         /* If platform's RF_KILL switch is set to KILL,
6726          * wait for BIT_INT_RF_KILL interrupt before loading uCode
6727          * and getting things started */
6728         if (!(iwl_read32(priv, CSR_GP_CNTRL) &
6729                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
6730                 hw_rf_kill = 1;
6731
6732         if (test_bit(STATUS_RF_KILL_HW, &priv->status) || hw_rf_kill) {
6733                 IWL_WARNING("Radio disabled by HW RF Kill switch\n");
6734                 return 0;
6735         }
6736
6737         for (i = 0; i < MAX_HW_RESTARTS; i++) {
6738
6739                 iwl_clear_stations_table(priv);
6740
6741                 /* load bootstrap state machine,
6742                  * load bootstrap program into processor's memory,
6743                  * prepare to load the "initialize" uCode */
6744                 rc = iwl_load_bsm(priv);
6745
6746                 if (rc) {
6747                         IWL_ERROR("Unable to set up bootstrap uCode: %d\n", rc);
6748                         continue;
6749                 }
6750
6751                 /* start card; "initialize" will load runtime ucode */
6752                 iwl_nic_start(priv);
6753
6754                 /* MAC Address location in EEPROM same for 3945/4965 */
6755                 get_eeprom_mac(priv, priv->mac_addr);
6756                 IWL_DEBUG_INFO("MAC address: %s\n",
6757                                print_mac(mac, priv->mac_addr));
6758
6759                 SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
6760
6761                 IWL_DEBUG_INFO(DRV_NAME " is coming up\n");
6762
6763                 return 0;
6764         }
6765
6766         set_bit(STATUS_EXIT_PENDING, &priv->status);
6767         __iwl_down(priv);
6768
6769         /* tried to restart and config the device for as long as our
6770          * patience could withstand */
6771         IWL_ERROR("Unable to initialize device after %d attempts.\n", i);
6772         return -EIO;
6773 }
6774
6775
6776 /*****************************************************************************
6777  *
6778  * Workqueue callbacks
6779  *
6780  *****************************************************************************/
6781
6782 static void iwl_bg_init_alive_start(struct work_struct *data)
6783 {
6784         struct iwl_priv *priv =
6785             container_of(data, struct iwl_priv, init_alive_start.work);
6786
6787         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6788                 return;
6789
6790         mutex_lock(&priv->mutex);
6791         iwl_init_alive_start(priv);
6792         mutex_unlock(&priv->mutex);
6793 }
6794
6795 static void iwl_bg_alive_start(struct work_struct *data)
6796 {
6797         struct iwl_priv *priv =
6798             container_of(data, struct iwl_priv, alive_start.work);
6799
6800         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6801                 return;
6802
6803         mutex_lock(&priv->mutex);
6804         iwl_alive_start(priv);
6805         mutex_unlock(&priv->mutex);
6806 }
6807
6808 static void iwl_bg_rf_kill(struct work_struct *work)
6809 {
6810         struct iwl_priv *priv = container_of(work, struct iwl_priv, rf_kill);
6811
6812         wake_up_interruptible(&priv->wait_command_queue);
6813
6814         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6815                 return;
6816
6817         mutex_lock(&priv->mutex);
6818
6819         if (!iwl_is_rfkill(priv)) {
6820                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL,
6821                           "HW and/or SW RF Kill no longer active, restarting "
6822                           "device\n");
6823                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
6824                         queue_work(priv->workqueue, &priv->restart);
6825         } else {
6826
6827                 if (!test_bit(STATUS_RF_KILL_HW, &priv->status))
6828                         IWL_DEBUG_RF_KILL("Can not turn radio back on - "
6829                                           "disabled by SW switch\n");
6830                 else
6831                         IWL_WARNING("Radio Frequency Kill Switch is On:\n"
6832                                     "Kill switch must be turned off for "
6833                                     "wireless networking to work.\n");
6834         }
6835         mutex_unlock(&priv->mutex);
6836 }
6837
6838 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
6839
6840 static void iwl_bg_scan_check(struct work_struct *data)
6841 {
6842         struct iwl_priv *priv =
6843             container_of(data, struct iwl_priv, scan_check.work);
6844
6845         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6846                 return;
6847
6848         mutex_lock(&priv->mutex);
6849         if (test_bit(STATUS_SCANNING, &priv->status) ||
6850             test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
6851                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN,
6852                           "Scan completion watchdog resetting adapter (%dms)\n",
6853                           jiffies_to_msecs(IWL_SCAN_CHECK_WATCHDOG));
6854
6855                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
6856                         iwl_send_scan_abort(priv);
6857         }
6858         mutex_unlock(&priv->mutex);
6859 }
6860
6861 static void iwl_bg_request_scan(struct work_struct *data)
6862 {
6863         struct iwl_priv *priv =
6864             container_of(data, struct iwl_priv, request_scan);
6865         struct iwl_host_cmd cmd = {
6866                 .id = REPLY_SCAN_CMD,
6867                 .len = sizeof(struct iwl_scan_cmd),
6868                 .meta.flags = CMD_SIZE_HUGE,
6869         };
6870         int rc = 0;
6871         struct iwl_scan_cmd *scan;
6872         struct ieee80211_conf *conf = NULL;
6873         u8 direct_mask;
6874         int phymode;
6875
6876         conf = ieee80211_get_hw_conf(priv->hw);
6877
6878         mutex_lock(&priv->mutex);
6879
6880         if (!iwl_is_ready(priv)) {
6881                 IWL_WARNING("request scan called when driver not ready.\n");
6882                 goto done;
6883         }
6884
6885         /* Make sure the scan wasn't cancelled before this queued work
6886          * was given the chance to run... */
6887         if (!test_bit(STATUS_SCANNING, &priv->status))
6888                 goto done;
6889
6890         /* This should never be called or scheduled if there is currently
6891          * a scan active in the hardware. */
6892         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
6893                 IWL_DEBUG_INFO("Multiple concurrent scan requests in parallel. "
6894                                "Ignoring second request.\n");
6895                 rc = -EIO;
6896                 goto done;
6897         }
6898
6899         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
6900                 IWL_DEBUG_SCAN("Aborting scan due to device shutdown\n");
6901                 goto done;
6902         }
6903
6904         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
6905                 IWL_DEBUG_HC("Scan request while abort pending.  Queuing.\n");
6906                 goto done;
6907         }
6908
6909         if (iwl_is_rfkill(priv)) {
6910                 IWL_DEBUG_HC("Aborting scan due to RF Kill activation\n");
6911                 goto done;
6912         }
6913
6914         if (!test_bit(STATUS_READY, &priv->status)) {
6915                 IWL_DEBUG_HC("Scan request while uninitialized.  Queuing.\n");
6916                 goto done;
6917         }
6918
6919         if (!priv->scan_bands) {
6920                 IWL_DEBUG_HC("Aborting scan due to no requested bands\n");
6921                 goto done;
6922         }
6923
6924         if (!priv->scan) {
6925                 priv->scan = kmalloc(sizeof(struct iwl_scan_cmd) +
6926                                      IWL_MAX_SCAN_SIZE, GFP_KERNEL);
6927                 if (!priv->scan) {
6928                         rc = -ENOMEM;
6929                         goto done;
6930                 }
6931         }
6932         scan = priv->scan;
6933         memset(scan, 0, sizeof(struct iwl_scan_cmd) + IWL_MAX_SCAN_SIZE);
6934
6935         scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
6936         scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
6937
6938         if (iwl_is_associated(priv)) {
6939                 u16 interval = 0;
6940                 u32 extra;
6941                 u32 suspend_time = 100;
6942                 u32 scan_suspend_time = 100;
6943                 unsigned long flags;
6944
6945                 IWL_DEBUG_INFO("Scanning while associated...\n");
6946
6947                 spin_lock_irqsave(&priv->lock, flags);
6948                 interval = priv->beacon_int;
6949                 spin_unlock_irqrestore(&priv->lock, flags);
6950
6951                 scan->suspend_time = 0;
6952                 scan->max_out_time = cpu_to_le32(200 * 1024);
6953                 if (!interval)
6954                         interval = suspend_time;
6955
6956                 extra = (suspend_time / interval) << 22;
6957                 scan_suspend_time = (extra |
6958                     ((suspend_time % interval) * 1024));
6959                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
6960                 IWL_DEBUG_SCAN("suspend_time 0x%X beacon interval %d\n",
6961                                scan_suspend_time, interval);
6962         }
6963
6964         /* We should add the ability for user to lock to PASSIVE ONLY */
6965         if (priv->one_direct_scan) {
6966                 IWL_DEBUG_SCAN
6967                     ("Kicking off one direct scan for '%s'\n",
6968                      iwl_escape_essid(priv->direct_ssid,
6969                                       priv->direct_ssid_len));
6970                 scan->direct_scan[0].id = WLAN_EID_SSID;
6971                 scan->direct_scan[0].len = priv->direct_ssid_len;
6972                 memcpy(scan->direct_scan[0].ssid,
6973                        priv->direct_ssid, priv->direct_ssid_len);
6974                 direct_mask = 1;
6975         } else if (!iwl_is_associated(priv) && priv->essid_len) {
6976                 scan->direct_scan[0].id = WLAN_EID_SSID;
6977                 scan->direct_scan[0].len = priv->essid_len;
6978                 memcpy(scan->direct_scan[0].ssid, priv->essid, priv->essid_len);
6979                 direct_mask = 1;
6980         } else
6981                 direct_mask = 0;
6982
6983         /* We don't build a direct scan probe request; the uCode will do
6984          * that based on the direct_mask added to each channel entry */
6985         scan->tx_cmd.len = cpu_to_le16(
6986                 iwl_fill_probe_req(priv, (struct ieee80211_mgmt *)scan->data,
6987                         IWL_MAX_SCAN_SIZE - sizeof(scan), 0));
6988         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
6989         scan->tx_cmd.sta_id = priv->hw_setting.bcast_sta_id;
6990         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
6991
6992         /* flags + rate selection */
6993
6994         scan->tx_cmd.tx_flags |= cpu_to_le32(0x200);
6995
6996         switch (priv->scan_bands) {
6997         case 2:
6998                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
6999                 scan->tx_cmd.rate_n_flags =
7000                                 iwl_hw_set_rate_n_flags(IWL_RATE_1M_PLCP,
7001                                 RATE_MCS_ANT_B_MSK|RATE_MCS_CCK_MSK);
7002
7003                 scan->good_CRC_th = 0;
7004                 phymode = MODE_IEEE80211G;
7005                 break;
7006
7007         case 1:
7008                 scan->tx_cmd.rate_n_flags =
7009                                 iwl_hw_set_rate_n_flags(IWL_RATE_6M_PLCP,
7010                                 RATE_MCS_ANT_B_MSK);
7011                 scan->good_CRC_th = IWL_GOOD_CRC_TH;
7012                 phymode = MODE_IEEE80211A;
7013                 break;
7014
7015         default:
7016                 IWL_WARNING("Invalid scan band count\n");
7017                 goto done;
7018         }
7019
7020         /* select Rx chains */
7021
7022         /* Force use of chains B and C (0x6) for scan Rx.
7023          * Avoid A (0x1) because of its off-channel reception on A-band.
7024          * MIMO is not used here, but value is required to make uCode happy. */
7025         scan->rx_chain = RXON_RX_CHAIN_DRIVER_FORCE_MSK |
7026                         cpu_to_le16((0x7 << RXON_RX_CHAIN_VALID_POS) |
7027                         (0x6 << RXON_RX_CHAIN_FORCE_SEL_POS) |
7028                         (0x7 << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS));
7029
7030         if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR)
7031                 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
7032
7033         if (direct_mask)
7034                 IWL_DEBUG_SCAN
7035                     ("Initiating direct scan for %s.\n",
7036                      iwl_escape_essid(priv->essid, priv->essid_len));
7037         else
7038                 IWL_DEBUG_SCAN("Initiating indirect scan.\n");
7039
7040         scan->channel_count =
7041                 iwl_get_channels_for_scan(
7042                         priv, phymode, 1, /* active */
7043                         direct_mask,
7044                         (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
7045
7046         cmd.len += le16_to_cpu(scan->tx_cmd.len) +
7047             scan->channel_count * sizeof(struct iwl_scan_channel);
7048         cmd.data = scan;
7049         scan->len = cpu_to_le16(cmd.len);
7050
7051         set_bit(STATUS_SCAN_HW, &priv->status);
7052         rc = iwl_send_cmd_sync(priv, &cmd);
7053         if (rc)
7054                 goto done;
7055
7056         queue_delayed_work(priv->workqueue, &priv->scan_check,
7057                            IWL_SCAN_CHECK_WATCHDOG);
7058
7059         mutex_unlock(&priv->mutex);
7060         return;
7061
7062  done:
7063         /* inform mac80211 sacn aborted */
7064         queue_work(priv->workqueue, &priv->scan_completed);
7065         mutex_unlock(&priv->mutex);
7066 }
7067
7068 static void iwl_bg_up(struct work_struct *data)
7069 {
7070         struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
7071
7072         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
7073                 return;
7074
7075         mutex_lock(&priv->mutex);
7076         __iwl_up(priv);
7077         mutex_unlock(&priv->mutex);
7078 }
7079
7080 static void iwl_bg_restart(struct work_struct *data)
7081 {
7082         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
7083
7084         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
7085                 return;
7086
7087         iwl_down(priv);
7088         queue_work(priv->workqueue, &priv->up);
7089 }
7090
7091 static void iwl_bg_rx_replenish(struct work_struct *data)
7092 {
7093         struct iwl_priv *priv =
7094             container_of(data, struct iwl_priv, rx_replenish);
7095
7096         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
7097                 return;
7098
7099         mutex_lock(&priv->mutex);
7100         iwl_rx_replenish(priv);
7101         mutex_unlock(&priv->mutex);
7102 }
7103
7104 static void iwl_bg_post_associate(struct work_struct *data)
7105 {
7106         struct iwl_priv *priv = container_of(data, struct iwl_priv,
7107                                              post_associate.work);
7108
7109         int rc = 0;
7110         struct ieee80211_conf *conf = NULL;
7111         DECLARE_MAC_BUF(mac);
7112
7113         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
7114                 IWL_ERROR("%s Should not be called in AP mode\n", __FUNCTION__);
7115                 return;
7116         }
7117
7118         IWL_DEBUG_ASSOC("Associated as %d to: %s\n",
7119                         priv->assoc_id,
7120                         print_mac(mac, priv->active_rxon.bssid_addr));
7121
7122
7123         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
7124                 return;
7125
7126         mutex_lock(&priv->mutex);
7127
7128         if (!priv->interface_id || !priv->is_open) {
7129                 mutex_unlock(&priv->mutex);
7130                 return;
7131         }
7132         iwl_scan_cancel_timeout(priv, 200);
7133
7134         conf = ieee80211_get_hw_conf(priv->hw);
7135
7136         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7137         iwl_commit_rxon(priv);
7138
7139         memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
7140         iwl_setup_rxon_timing(priv);
7141         rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
7142                               sizeof(priv->rxon_timing), &priv->rxon_timing);
7143         if (rc)
7144                 IWL_WARNING("REPLY_RXON_TIMING failed - "
7145                             "Attempting to continue.\n");
7146
7147         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
7148
7149 #ifdef CONFIG_IWLWIFI_HT
7150         if (priv->is_ht_enabled && priv->current_assoc_ht.is_ht)
7151                 iwl4965_set_rxon_ht(priv, &priv->current_assoc_ht);
7152         else {
7153                 priv->active_rate_ht[0] = 0;
7154                 priv->active_rate_ht[1] = 0;
7155                 priv->current_channel_width = IWL_CHANNEL_WIDTH_20MHZ;
7156         }
7157 #endif /* CONFIG_IWLWIFI_HT*/
7158         iwl4965_set_rxon_chain(priv);
7159         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
7160
7161         IWL_DEBUG_ASSOC("assoc id %d beacon interval %d\n",
7162                         priv->assoc_id, priv->beacon_int);
7163
7164         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
7165                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
7166         else
7167                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
7168
7169         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
7170                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
7171                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
7172                 else
7173                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
7174
7175                 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
7176                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
7177
7178         }
7179
7180         iwl_commit_rxon(priv);
7181
7182         switch (priv->iw_mode) {
7183         case IEEE80211_IF_TYPE_STA:
7184                 iwl_rate_scale_init(priv->hw, IWL_AP_ID);
7185                 break;
7186
7187         case IEEE80211_IF_TYPE_IBSS:
7188
7189                 /* clear out the station table */
7190                 iwl_clear_stations_table(priv);
7191
7192                 iwl_rxon_add_station(priv, BROADCAST_ADDR, 0);
7193                 iwl_rxon_add_station(priv, priv->bssid, 0);
7194                 iwl_rate_scale_init(priv->hw, IWL_STA_ID);
7195                 iwl_send_beacon_cmd(priv);
7196
7197                 break;
7198
7199         default:
7200                 IWL_ERROR("%s Should not be called in %d mode\n",
7201                                 __FUNCTION__, priv->iw_mode);
7202                 break;
7203         }
7204
7205         iwl_sequence_reset(priv);
7206
7207 #ifdef CONFIG_IWLWIFI_SENSITIVITY
7208         /* Enable Rx differential gain and sensitivity calibrations */
7209         iwl4965_chain_noise_reset(priv);
7210         priv->start_calib = 1;
7211 #endif /* CONFIG_IWLWIFI_SENSITIVITY */
7212
7213         if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
7214                 priv->assoc_station_added = 1;
7215
7216 #ifdef CONFIG_IWLWIFI_QOS
7217         iwl_activate_qos(priv, 0);
7218 #endif /* CONFIG_IWLWIFI_QOS */
7219         mutex_unlock(&priv->mutex);
7220 }
7221
7222 static void iwl_bg_abort_scan(struct work_struct *work)
7223 {
7224         struct iwl_priv *priv = container_of(work, struct iwl_priv,
7225                                              abort_scan);
7226
7227         if (!iwl_is_ready(priv))
7228                 return;
7229
7230         mutex_lock(&priv->mutex);
7231
7232         set_bit(STATUS_SCAN_ABORTING, &priv->status);
7233         iwl_send_scan_abort(priv);
7234
7235         mutex_unlock(&priv->mutex);
7236 }
7237
7238 static void iwl_bg_scan_completed(struct work_struct *work)
7239 {
7240         struct iwl_priv *priv =
7241             container_of(work, struct iwl_priv, scan_completed);
7242
7243         IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN, "SCAN complete scan\n");
7244
7245         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
7246                 return;
7247
7248         ieee80211_scan_completed(priv->hw);
7249
7250         /* Since setting the TXPOWER may have been deferred while
7251          * performing the scan, fire one off */
7252         mutex_lock(&priv->mutex);
7253         iwl_hw_reg_send_txpower(priv);
7254         mutex_unlock(&priv->mutex);
7255 }
7256
7257 /*****************************************************************************
7258  *
7259  * mac80211 entry point functions
7260  *
7261  *****************************************************************************/
7262
7263 static int iwl_mac_start(struct ieee80211_hw *hw)
7264 {
7265         struct iwl_priv *priv = hw->priv;
7266
7267         IWL_DEBUG_MAC80211("enter\n");
7268
7269         /* we should be verifying the device is ready to be opened */
7270         mutex_lock(&priv->mutex);
7271
7272         priv->is_open = 1;
7273
7274         if (!iwl_is_rfkill(priv))
7275                 ieee80211_start_queues(priv->hw);
7276
7277         mutex_unlock(&priv->mutex);
7278         IWL_DEBUG_MAC80211("leave\n");
7279         return 0;
7280 }
7281
7282 static void iwl_mac_stop(struct ieee80211_hw *hw)
7283 {
7284         struct iwl_priv *priv = hw->priv;
7285
7286         IWL_DEBUG_MAC80211("enter\n");
7287
7288
7289         mutex_lock(&priv->mutex);
7290         /* stop mac, cancel any scan request and clear
7291          * RXON_FILTER_ASSOC_MSK BIT
7292          */
7293         priv->is_open = 0;
7294         iwl_scan_cancel_timeout(priv, 100);
7295         cancel_delayed_work(&priv->post_associate);
7296         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7297         iwl_commit_rxon(priv);
7298         mutex_unlock(&priv->mutex);
7299
7300         IWL_DEBUG_MAC80211("leave\n");
7301 }
7302
7303 static int iwl_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb,
7304                       struct ieee80211_tx_control *ctl)
7305 {
7306         struct iwl_priv *priv = hw->priv;
7307
7308         IWL_DEBUG_MAC80211("enter\n");
7309
7310         if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR) {
7311                 IWL_DEBUG_MAC80211("leave - monitor\n");
7312                 return -1;
7313         }
7314
7315         IWL_DEBUG_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
7316                      ctl->tx_rate);
7317
7318         if (iwl_tx_skb(priv, skb, ctl))
7319                 dev_kfree_skb_any(skb);
7320
7321         IWL_DEBUG_MAC80211("leave\n");
7322         return 0;
7323 }
7324
7325 static int iwl_mac_add_interface(struct ieee80211_hw *hw,
7326                                  struct ieee80211_if_init_conf *conf)
7327 {
7328         struct iwl_priv *priv = hw->priv;
7329         unsigned long flags;
7330         DECLARE_MAC_BUF(mac);
7331
7332         IWL_DEBUG_MAC80211("enter: id %d, type %d\n", conf->if_id, conf->type);
7333
7334         if (priv->interface_id) {
7335                 IWL_DEBUG_MAC80211("leave - interface_id != 0\n");
7336                 return 0;
7337         }
7338
7339         spin_lock_irqsave(&priv->lock, flags);
7340         priv->interface_id = conf->if_id;
7341
7342         spin_unlock_irqrestore(&priv->lock, flags);
7343
7344         mutex_lock(&priv->mutex);
7345
7346         if (conf->mac_addr) {
7347                 IWL_DEBUG_MAC80211("Set %s\n", print_mac(mac, conf->mac_addr));
7348                 memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
7349         }
7350         iwl_set_mode(priv, conf->type);
7351
7352         IWL_DEBUG_MAC80211("leave\n");
7353         mutex_unlock(&priv->mutex);
7354
7355         return 0;
7356 }
7357
7358 /**
7359  * iwl_mac_config - mac80211 config callback
7360  *
7361  * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
7362  * be set inappropriately and the driver currently sets the hardware up to
7363  * use it whenever needed.
7364  */
7365 static int iwl_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf)
7366 {
7367         struct iwl_priv *priv = hw->priv;
7368         const struct iwl_channel_info *ch_info;
7369         unsigned long flags;
7370
7371         mutex_lock(&priv->mutex);
7372         IWL_DEBUG_MAC80211("enter to channel %d\n", conf->channel);
7373
7374         if (!iwl_is_ready(priv)) {
7375                 IWL_DEBUG_MAC80211("leave - not ready\n");
7376                 mutex_unlock(&priv->mutex);
7377                 return -EIO;
7378         }
7379
7380         /* TODO: Figure out how to get ieee80211_local->sta_scanning w/ only
7381          * what is exposed through include/ declrations */
7382         if (unlikely(!iwl_param_disable_hw_scan &&
7383                      test_bit(STATUS_SCANNING, &priv->status))) {
7384                 IWL_DEBUG_MAC80211("leave - scanning\n");
7385                 mutex_unlock(&priv->mutex);
7386                 return 0;
7387         }
7388
7389         spin_lock_irqsave(&priv->lock, flags);
7390
7391         ch_info = iwl_get_channel_info(priv, conf->phymode, conf->channel);
7392         if (!is_channel_valid(ch_info)) {
7393                 IWL_DEBUG_SCAN("Channel %d [%d] is INVALID for this SKU.\n",
7394                                conf->channel, conf->phymode);
7395                 IWL_DEBUG_MAC80211("leave - invalid channel\n");
7396                 spin_unlock_irqrestore(&priv->lock, flags);
7397                 mutex_unlock(&priv->mutex);
7398                 return -EINVAL;
7399         }
7400
7401 #ifdef CONFIG_IWLWIFI_HT
7402         /* if we are switching fron ht to 2.4 clear flags
7403          * from any ht related info since 2.4 does not
7404          * support ht */
7405         if ((le16_to_cpu(priv->staging_rxon.channel) != conf->channel)
7406 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
7407             && !(conf->flags & IEEE80211_CONF_CHANNEL_SWITCH)
7408 #endif
7409         )
7410                 priv->staging_rxon.flags = 0;
7411 #endif /* CONFIG_IWLWIFI_HT */
7412
7413         iwl_set_rxon_channel(priv, conf->phymode, conf->channel);
7414
7415         iwl_set_flags_for_phymode(priv, conf->phymode);
7416
7417         /* The list of supported rates and rate mask can be different
7418          * for each phymode; since the phymode may have changed, reset
7419          * the rate mask to what mac80211 lists */
7420         iwl_set_rate(priv);
7421
7422         spin_unlock_irqrestore(&priv->lock, flags);
7423
7424 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
7425         if (conf->flags & IEEE80211_CONF_CHANNEL_SWITCH) {
7426                 iwl_hw_channel_switch(priv, conf->channel);
7427                 mutex_unlock(&priv->mutex);
7428                 return 0;
7429         }
7430 #endif
7431
7432         iwl_radio_kill_sw(priv, !conf->radio_enabled);
7433
7434         if (!conf->radio_enabled) {
7435                 IWL_DEBUG_MAC80211("leave - radio disabled\n");
7436                 mutex_unlock(&priv->mutex);
7437                 return 0;
7438         }
7439
7440         if (iwl_is_rfkill(priv)) {
7441                 IWL_DEBUG_MAC80211("leave - RF kill\n");
7442                 mutex_unlock(&priv->mutex);
7443                 return -EIO;
7444         }
7445
7446         iwl_set_rate(priv);
7447
7448         if (memcmp(&priv->active_rxon,
7449                    &priv->staging_rxon, sizeof(priv->staging_rxon)))
7450                 iwl_commit_rxon(priv);
7451         else
7452                 IWL_DEBUG_INFO("No re-sending same RXON configuration.\n");
7453
7454         IWL_DEBUG_MAC80211("leave\n");
7455
7456         mutex_unlock(&priv->mutex);
7457
7458         return 0;
7459 }
7460
7461 static void iwl_config_ap(struct iwl_priv *priv)
7462 {
7463         int rc = 0;
7464
7465         if (priv->status & STATUS_EXIT_PENDING)
7466                 return;
7467
7468         /* The following should be done only at AP bring up */
7469         if ((priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) == 0) {
7470
7471                 /* RXON - unassoc (to set timing command) */
7472                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7473                 iwl_commit_rxon(priv);
7474
7475                 /* RXON Timing */
7476                 memset(&priv->rxon_timing, 0, sizeof(struct iwl_rxon_time_cmd));
7477                 iwl_setup_rxon_timing(priv);
7478                 rc = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
7479                                 sizeof(priv->rxon_timing), &priv->rxon_timing);
7480                 if (rc)
7481                         IWL_WARNING("REPLY_RXON_TIMING failed - "
7482                                         "Attempting to continue.\n");
7483
7484                 iwl4965_set_rxon_chain(priv);
7485
7486                 /* FIXME: what should be the assoc_id for AP? */
7487                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
7488                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
7489                         priv->staging_rxon.flags |=
7490                                 RXON_FLG_SHORT_PREAMBLE_MSK;
7491                 else
7492                         priv->staging_rxon.flags &=
7493                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
7494
7495                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
7496                         if (priv->assoc_capability &
7497                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
7498                                 priv->staging_rxon.flags |=
7499                                         RXON_FLG_SHORT_SLOT_MSK;
7500                         else
7501                                 priv->staging_rxon.flags &=
7502                                         ~RXON_FLG_SHORT_SLOT_MSK;
7503
7504                         if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
7505                                 priv->staging_rxon.flags &=
7506                                         ~RXON_FLG_SHORT_SLOT_MSK;
7507                 }
7508                 /* restore RXON assoc */
7509                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
7510                 iwl_commit_rxon(priv);
7511 #ifdef CONFIG_IWLWIFI_QOS
7512                 iwl_activate_qos(priv, 1);
7513 #endif
7514                 iwl_rxon_add_station(priv, BROADCAST_ADDR, 0);
7515         }
7516         iwl_send_beacon_cmd(priv);
7517
7518         /* FIXME - we need to add code here to detect a totally new
7519          * configuration, reset the AP, unassoc, rxon timing, assoc,
7520          * clear sta table, add BCAST sta... */
7521 }
7522
7523 static int iwl_mac_config_interface(struct ieee80211_hw *hw, int if_id,
7524                                     struct ieee80211_if_conf *conf)
7525 {
7526         struct iwl_priv *priv = hw->priv;
7527         DECLARE_MAC_BUF(mac);
7528         unsigned long flags;
7529         int rc;
7530
7531         if (conf == NULL)
7532                 return -EIO;
7533
7534         if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
7535             (!conf->beacon || !conf->ssid_len)) {
7536                 IWL_DEBUG_MAC80211
7537                     ("Leaving in AP mode because HostAPD is not ready.\n");
7538                 return 0;
7539         }
7540
7541         mutex_lock(&priv->mutex);
7542
7543         IWL_DEBUG_MAC80211("enter: interface id %d\n", if_id);
7544         if (conf->bssid)
7545                 IWL_DEBUG_MAC80211("bssid: %s\n",
7546                                    print_mac(mac, conf->bssid));
7547
7548 /*
7549  * very dubious code was here; the probe filtering flag is never set:
7550  *
7551         if (unlikely(test_bit(STATUS_SCANNING, &priv->status)) &&
7552             !(priv->hw->flags & IEEE80211_HW_NO_PROBE_FILTERING)) {
7553  */
7554         if (unlikely(test_bit(STATUS_SCANNING, &priv->status))) {
7555                 IWL_DEBUG_MAC80211("leave - scanning\n");
7556                 mutex_unlock(&priv->mutex);
7557                 return 0;
7558         }
7559
7560         if (priv->interface_id != if_id) {
7561                 IWL_DEBUG_MAC80211("leave - interface_id != if_id\n");
7562                 mutex_unlock(&priv->mutex);
7563                 return 0;
7564         }
7565
7566         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
7567                 if (!conf->bssid) {
7568                         conf->bssid = priv->mac_addr;
7569                         memcpy(priv->bssid, priv->mac_addr, ETH_ALEN);
7570                         IWL_DEBUG_MAC80211("bssid was set to: %s\n",
7571                                            print_mac(mac, conf->bssid));
7572                 }
7573                 if (priv->ibss_beacon)
7574                         dev_kfree_skb(priv->ibss_beacon);
7575
7576                 priv->ibss_beacon = conf->beacon;
7577         }
7578
7579         if (conf->bssid && !is_zero_ether_addr(conf->bssid) &&
7580             !is_multicast_ether_addr(conf->bssid)) {
7581                 /* If there is currently a HW scan going on in the background
7582                  * then we need to cancel it else the RXON below will fail. */
7583                 if (iwl_scan_cancel_timeout(priv, 100)) {
7584                         IWL_WARNING("Aborted scan still in progress "
7585                                     "after 100ms\n");
7586                         IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
7587                         mutex_unlock(&priv->mutex);
7588                         return -EAGAIN;
7589                 }
7590                 memcpy(priv->staging_rxon.bssid_addr, conf->bssid, ETH_ALEN);
7591
7592                 /* TODO: Audit driver for usage of these members and see
7593                  * if mac80211 deprecates them (priv->bssid looks like it
7594                  * shouldn't be there, but I haven't scanned the IBSS code
7595                  * to verify) - jpk */
7596                 memcpy(priv->bssid, conf->bssid, ETH_ALEN);
7597
7598                 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
7599                         iwl_config_ap(priv);
7600                 else {
7601                         rc = iwl_commit_rxon(priv);
7602                         if ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && rc)
7603                                 iwl_rxon_add_station(
7604                                         priv, priv->active_rxon.bssid_addr, 1);
7605                 }
7606
7607         } else {
7608                 iwl_scan_cancel_timeout(priv, 100);
7609                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7610                 iwl_commit_rxon(priv);
7611         }
7612
7613         spin_lock_irqsave(&priv->lock, flags);
7614         if (!conf->ssid_len)
7615                 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
7616         else
7617                 memcpy(priv->essid, conf->ssid, conf->ssid_len);
7618
7619         priv->essid_len = conf->ssid_len;
7620         spin_unlock_irqrestore(&priv->lock, flags);
7621
7622         IWL_DEBUG_MAC80211("leave\n");
7623         mutex_unlock(&priv->mutex);
7624
7625         return 0;
7626 }
7627
7628 static void iwl_configure_filter(struct ieee80211_hw *hw,
7629                                  unsigned int changed_flags,
7630                                  unsigned int *total_flags,
7631                                  int mc_count, struct dev_addr_list *mc_list)
7632 {
7633         /*
7634          * XXX: dummy
7635          * see also iwl_connection_init_rx_config
7636          */
7637         *total_flags = 0;
7638 }
7639
7640 static void iwl_mac_remove_interface(struct ieee80211_hw *hw,
7641                                      struct ieee80211_if_init_conf *conf)
7642 {
7643         struct iwl_priv *priv = hw->priv;
7644
7645         IWL_DEBUG_MAC80211("enter\n");
7646
7647         mutex_lock(&priv->mutex);
7648
7649         iwl_scan_cancel_timeout(priv, 100);
7650         cancel_delayed_work(&priv->post_associate);
7651         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7652         iwl_commit_rxon(priv);
7653
7654         if (priv->interface_id == conf->if_id) {
7655                 priv->interface_id = 0;
7656                 memset(priv->bssid, 0, ETH_ALEN);
7657                 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
7658                 priv->essid_len = 0;
7659         }
7660         mutex_unlock(&priv->mutex);
7661
7662         IWL_DEBUG_MAC80211("leave\n");
7663
7664 }
7665
7666 #define IWL_DELAY_NEXT_SCAN (HZ*2)
7667 static int iwl_mac_hw_scan(struct ieee80211_hw *hw, u8 *ssid, size_t len)
7668 {
7669         int rc = 0;
7670         unsigned long flags;
7671         struct iwl_priv *priv = hw->priv;
7672
7673         IWL_DEBUG_MAC80211("enter\n");
7674
7675         mutex_lock(&priv->mutex);
7676         spin_lock_irqsave(&priv->lock, flags);
7677
7678         if (!iwl_is_ready_rf(priv)) {
7679                 rc = -EIO;
7680                 IWL_DEBUG_MAC80211("leave - not ready or exit pending\n");
7681                 goto out_unlock;
7682         }
7683
7684         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {    /* APs don't scan */
7685                 rc = -EIO;
7686                 IWL_ERROR("ERROR: APs don't scan\n");
7687                 goto out_unlock;
7688         }
7689
7690         /* if we just finished scan ask for delay */
7691         if (priv->last_scan_jiffies &&
7692             time_after(priv->last_scan_jiffies + IWL_DELAY_NEXT_SCAN,
7693                        jiffies)) {
7694                 rc = -EAGAIN;
7695                 goto out_unlock;
7696         }
7697         if (len) {
7698                 IWL_DEBUG_SCAN("direct scan for  "
7699                                "%s [%d]\n ",
7700                                iwl_escape_essid(ssid, len), (int)len);
7701
7702                 priv->one_direct_scan = 1;
7703                 priv->direct_ssid_len = (u8)
7704                     min((u8) len, (u8) IW_ESSID_MAX_SIZE);
7705                 memcpy(priv->direct_ssid, ssid, priv->direct_ssid_len);
7706         } else
7707                 priv->one_direct_scan = 0;
7708
7709         rc = iwl_scan_initiate(priv);
7710
7711         IWL_DEBUG_MAC80211("leave\n");
7712
7713 out_unlock:
7714         spin_unlock_irqrestore(&priv->lock, flags);
7715         mutex_unlock(&priv->mutex);
7716
7717         return rc;
7718 }
7719
7720 static int iwl_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
7721                            const u8 *local_addr, const u8 *addr,
7722                            struct ieee80211_key_conf *key)
7723 {
7724         struct iwl_priv *priv = hw->priv;
7725         DECLARE_MAC_BUF(mac);
7726         int rc = 0;
7727         u8 sta_id;
7728
7729         IWL_DEBUG_MAC80211("enter\n");
7730
7731         if (!iwl_param_hwcrypto) {
7732                 IWL_DEBUG_MAC80211("leave - hwcrypto disabled\n");
7733                 return -EOPNOTSUPP;
7734         }
7735
7736         if (is_zero_ether_addr(addr))
7737                 /* only support pairwise keys */
7738                 return -EOPNOTSUPP;
7739
7740         sta_id = iwl_hw_find_station(priv, addr);
7741         if (sta_id == IWL_INVALID_STATION) {
7742                 IWL_DEBUG_MAC80211("leave - %s not in station map.\n",
7743                                    print_mac(mac, addr));
7744                 return -EINVAL;
7745         }
7746
7747         mutex_lock(&priv->mutex);
7748
7749         iwl_scan_cancel_timeout(priv, 100);
7750
7751         switch (cmd) {
7752         case  SET_KEY:
7753                 rc = iwl_update_sta_key_info(priv, key, sta_id);
7754                 if (!rc) {
7755                         iwl_set_rxon_hwcrypto(priv, 1);
7756                         iwl_commit_rxon(priv);
7757                         key->hw_key_idx = sta_id;
7758                         IWL_DEBUG_MAC80211("set_key success, using hwcrypto\n");
7759                         key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
7760                 }
7761                 break;
7762         case DISABLE_KEY:
7763                 rc = iwl_clear_sta_key_info(priv, sta_id);
7764                 if (!rc) {
7765                         iwl_set_rxon_hwcrypto(priv, 0);
7766                         iwl_commit_rxon(priv);
7767                         IWL_DEBUG_MAC80211("disable hwcrypto key\n");
7768                 }
7769                 break;
7770         default:
7771                 rc = -EINVAL;
7772         }
7773
7774         IWL_DEBUG_MAC80211("leave\n");
7775         mutex_unlock(&priv->mutex);
7776
7777         return rc;
7778 }
7779
7780 static int iwl_mac_conf_tx(struct ieee80211_hw *hw, int queue,
7781                            const struct ieee80211_tx_queue_params *params)
7782 {
7783         struct iwl_priv *priv = hw->priv;
7784 #ifdef CONFIG_IWLWIFI_QOS
7785         unsigned long flags;
7786         int q;
7787 #endif /* CONFIG_IWL_QOS */
7788
7789         IWL_DEBUG_MAC80211("enter\n");
7790
7791         if (!iwl_is_ready_rf(priv)) {
7792                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7793                 return -EIO;
7794         }
7795
7796         if (queue >= AC_NUM) {
7797                 IWL_DEBUG_MAC80211("leave - queue >= AC_NUM %d\n", queue);
7798                 return 0;
7799         }
7800
7801 #ifdef CONFIG_IWLWIFI_QOS
7802         if (!priv->qos_data.qos_enable) {
7803                 priv->qos_data.qos_active = 0;
7804                 IWL_DEBUG_MAC80211("leave - qos not enabled\n");
7805                 return 0;
7806         }
7807         q = AC_NUM - 1 - queue;
7808
7809         spin_lock_irqsave(&priv->lock, flags);
7810
7811         priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
7812         priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
7813         priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
7814         priv->qos_data.def_qos_parm.ac[q].edca_txop =
7815                         cpu_to_le16((params->burst_time * 100));
7816
7817         priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
7818         priv->qos_data.qos_active = 1;
7819
7820         spin_unlock_irqrestore(&priv->lock, flags);
7821
7822         mutex_lock(&priv->mutex);
7823         if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
7824                 iwl_activate_qos(priv, 1);
7825         else if (priv->assoc_id && iwl_is_associated(priv))
7826                 iwl_activate_qos(priv, 0);
7827
7828         mutex_unlock(&priv->mutex);
7829
7830 #endif /*CONFIG_IWLWIFI_QOS */
7831
7832         IWL_DEBUG_MAC80211("leave\n");
7833         return 0;
7834 }
7835
7836 static int iwl_mac_get_tx_stats(struct ieee80211_hw *hw,
7837                                 struct ieee80211_tx_queue_stats *stats)
7838 {
7839         struct iwl_priv *priv = hw->priv;
7840         int i, avail;
7841         struct iwl_tx_queue *txq;
7842         struct iwl_queue *q;
7843         unsigned long flags;
7844
7845         IWL_DEBUG_MAC80211("enter\n");
7846
7847         if (!iwl_is_ready_rf(priv)) {
7848                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7849                 return -EIO;
7850         }
7851
7852         spin_lock_irqsave(&priv->lock, flags);
7853
7854         for (i = 0; i < AC_NUM; i++) {
7855                 txq = &priv->txq[i];
7856                 q = &txq->q;
7857                 avail = iwl_queue_space(q);
7858
7859                 stats->data[i].len = q->n_window - avail;
7860                 stats->data[i].limit = q->n_window - q->high_mark;
7861                 stats->data[i].count = q->n_window;
7862
7863         }
7864         spin_unlock_irqrestore(&priv->lock, flags);
7865
7866         IWL_DEBUG_MAC80211("leave\n");
7867
7868         return 0;
7869 }
7870
7871 static int iwl_mac_get_stats(struct ieee80211_hw *hw,
7872                              struct ieee80211_low_level_stats *stats)
7873 {
7874         IWL_DEBUG_MAC80211("enter\n");
7875         IWL_DEBUG_MAC80211("leave\n");
7876
7877         return 0;
7878 }
7879
7880 static u64 iwl_mac_get_tsf(struct ieee80211_hw *hw)
7881 {
7882         IWL_DEBUG_MAC80211("enter\n");
7883         IWL_DEBUG_MAC80211("leave\n");
7884
7885         return 0;
7886 }
7887
7888 static void iwl_mac_reset_tsf(struct ieee80211_hw *hw)
7889 {
7890         struct iwl_priv *priv = hw->priv;
7891         unsigned long flags;
7892
7893         mutex_lock(&priv->mutex);
7894         IWL_DEBUG_MAC80211("enter\n");
7895
7896         priv->lq_mngr.lq_ready = 0;
7897 #ifdef CONFIG_IWLWIFI_HT
7898         spin_lock_irqsave(&priv->lock, flags);
7899         memset(&priv->current_assoc_ht, 0, sizeof(struct sta_ht_info));
7900         spin_unlock_irqrestore(&priv->lock, flags);
7901 #ifdef CONFIG_IWLWIFI_HT_AGG
7902 /*      if (priv->lq_mngr.agg_ctrl.granted_ba)
7903                 iwl4965_turn_off_agg(priv, TID_ALL_SPECIFIED);*/
7904
7905         memset(&(priv->lq_mngr.agg_ctrl), 0, sizeof(struct iwl_agg_control));
7906         priv->lq_mngr.agg_ctrl.tid_traffic_load_threshold = 10;
7907         priv->lq_mngr.agg_ctrl.ba_timeout = 5000;
7908         priv->lq_mngr.agg_ctrl.auto_agg = 1;
7909
7910         if (priv->lq_mngr.agg_ctrl.auto_agg)
7911                 priv->lq_mngr.agg_ctrl.requested_ba = TID_ALL_ENABLED;
7912 #endif /*CONFIG_IWLWIFI_HT_AGG */
7913 #endif /* CONFIG_IWLWIFI_HT */
7914
7915 #ifdef CONFIG_IWLWIFI_QOS
7916         iwl_reset_qos(priv);
7917 #endif
7918
7919         cancel_delayed_work(&priv->post_associate);
7920
7921         spin_lock_irqsave(&priv->lock, flags);
7922         priv->assoc_id = 0;
7923         priv->assoc_capability = 0;
7924         priv->call_post_assoc_from_beacon = 0;
7925         priv->assoc_station_added = 0;
7926
7927         /* new association get rid of ibss beacon skb */
7928         if (priv->ibss_beacon)
7929                 dev_kfree_skb(priv->ibss_beacon);
7930
7931         priv->ibss_beacon = NULL;
7932
7933         priv->beacon_int = priv->hw->conf.beacon_int;
7934         priv->timestamp1 = 0;
7935         priv->timestamp0 = 0;
7936         if ((priv->iw_mode == IEEE80211_IF_TYPE_STA))
7937                 priv->beacon_int = 0;
7938
7939         spin_unlock_irqrestore(&priv->lock, flags);
7940
7941         /* we are restarting association process
7942          * clear RXON_FILTER_ASSOC_MSK bit
7943          */
7944         if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
7945                 iwl_scan_cancel_timeout(priv, 100);
7946                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7947                 iwl_commit_rxon(priv);
7948         }
7949
7950         /* Per mac80211.h: This is only used in IBSS mode... */
7951         if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
7952
7953                 IWL_DEBUG_MAC80211("leave - not in IBSS\n");
7954                 mutex_unlock(&priv->mutex);
7955                 return;
7956         }
7957
7958         if (!iwl_is_ready_rf(priv)) {
7959                 IWL_DEBUG_MAC80211("leave - not ready\n");
7960                 mutex_unlock(&priv->mutex);
7961                 return;
7962         }
7963
7964         priv->only_active_channel = 0;
7965
7966         iwl_set_rate(priv);
7967
7968         mutex_unlock(&priv->mutex);
7969
7970         IWL_DEBUG_MAC80211("leave\n");
7971
7972 }
7973
7974 static int iwl_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb,
7975                                  struct ieee80211_tx_control *control)
7976 {
7977         struct iwl_priv *priv = hw->priv;
7978         unsigned long flags;
7979
7980         mutex_lock(&priv->mutex);
7981         IWL_DEBUG_MAC80211("enter\n");
7982
7983         if (!iwl_is_ready_rf(priv)) {
7984                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7985                 mutex_unlock(&priv->mutex);
7986                 return -EIO;
7987         }
7988
7989         if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
7990                 IWL_DEBUG_MAC80211("leave - not IBSS\n");
7991                 mutex_unlock(&priv->mutex);
7992                 return -EIO;
7993         }
7994
7995         spin_lock_irqsave(&priv->lock, flags);
7996
7997         if (priv->ibss_beacon)
7998                 dev_kfree_skb(priv->ibss_beacon);
7999
8000         priv->ibss_beacon = skb;
8001
8002         priv->assoc_id = 0;
8003
8004         IWL_DEBUG_MAC80211("leave\n");
8005         spin_unlock_irqrestore(&priv->lock, flags);
8006
8007 #ifdef CONFIG_IWLWIFI_QOS
8008         iwl_reset_qos(priv);
8009 #endif
8010
8011         queue_work(priv->workqueue, &priv->post_associate.work);
8012
8013         mutex_unlock(&priv->mutex);
8014
8015         return 0;
8016 }
8017
8018 #ifdef CONFIG_IWLWIFI_HT
8019 union ht_cap_info {
8020         struct {
8021                 u16 advanced_coding_cap         :1;
8022                 u16 supported_chan_width_set    :1;
8023                 u16 mimo_power_save_mode        :2;
8024                 u16 green_field                 :1;
8025                 u16 short_GI20                  :1;
8026                 u16 short_GI40                  :1;
8027                 u16 tx_stbc                     :1;
8028                 u16 rx_stbc                     :1;
8029                 u16 beam_forming                :1;
8030                 u16 delayed_ba                  :1;
8031                 u16 maximal_amsdu_size          :1;
8032                 u16 cck_mode_at_40MHz           :1;
8033                 u16 psmp_support                :1;
8034                 u16 stbc_ctrl_frame_support     :1;
8035                 u16 sig_txop_protection_support :1;
8036         };
8037         u16 val;
8038 } __attribute__ ((packed));
8039
8040 union ht_param_info{
8041         struct {
8042                 u8 max_rx_ampdu_factor  :2;
8043                 u8 mpdu_density         :3;
8044                 u8 reserved             :3;
8045         };
8046         u8 val;
8047 } __attribute__ ((packed));
8048
8049 union ht_exra_param_info {
8050         struct {
8051                 u8 ext_chan_offset              :2;
8052                 u8 tx_chan_width                :1;
8053                 u8 rifs_mode                    :1;
8054                 u8 controlled_access_only       :1;
8055                 u8 service_interval_granularity :3;
8056         };
8057         u8 val;
8058 } __attribute__ ((packed));
8059
8060 union ht_operation_mode{
8061         struct {
8062                 u16 op_mode     :2;
8063                 u16 non_GF      :1;
8064                 u16 reserved    :13;
8065         };
8066         u16 val;
8067 } __attribute__ ((packed));
8068
8069
8070 static int sta_ht_info_init(struct ieee80211_ht_capability *ht_cap,
8071                             struct ieee80211_ht_additional_info *ht_extra,
8072                             struct sta_ht_info *ht_info_ap,
8073                             struct sta_ht_info *ht_info)
8074 {
8075         union ht_cap_info cap;
8076         union ht_operation_mode op_mode;
8077         union ht_param_info param_info;
8078         union ht_exra_param_info extra_param_info;
8079
8080         IWL_DEBUG_MAC80211("enter: \n");
8081
8082         if (!ht_info) {
8083                 IWL_DEBUG_MAC80211("leave: ht_info is NULL\n");
8084                 return -1;
8085         }
8086
8087         if (ht_cap) {
8088                 cap.val = (u16) le16_to_cpu(ht_cap->capabilities_info);
8089                 param_info.val = ht_cap->mac_ht_params_info;
8090                 ht_info->is_ht = 1;
8091                 if (cap.short_GI20)
8092                         ht_info->sgf |= 0x1;
8093                 if (cap.short_GI40)
8094                         ht_info->sgf |= 0x2;
8095                 ht_info->is_green_field = cap.green_field;
8096                 ht_info->max_amsdu_size = cap.maximal_amsdu_size;
8097                 ht_info->supported_chan_width = cap.supported_chan_width_set;
8098                 ht_info->tx_mimo_ps_mode = cap.mimo_power_save_mode;
8099                 memcpy(ht_info->supp_rates, ht_cap->supported_mcs_set, 16);
8100
8101                 ht_info->ampdu_factor = param_info.max_rx_ampdu_factor;
8102                 ht_info->mpdu_density = param_info.mpdu_density;
8103
8104                 IWL_DEBUG_MAC80211("SISO mask 0x%X MIMO mask 0x%X \n",
8105                                     ht_cap->supported_mcs_set[0],
8106                                     ht_cap->supported_mcs_set[1]);
8107
8108                 if (ht_info_ap) {
8109                         ht_info->control_channel = ht_info_ap->control_channel;
8110                         ht_info->extension_chan_offset =
8111                                 ht_info_ap->extension_chan_offset;
8112                         ht_info->tx_chan_width = ht_info_ap->tx_chan_width;
8113                         ht_info->operating_mode = ht_info_ap->operating_mode;
8114                 }
8115
8116                 if (ht_extra) {
8117                         extra_param_info.val = ht_extra->ht_param;
8118                         ht_info->control_channel = ht_extra->control_chan;
8119                         ht_info->extension_chan_offset =
8120                             extra_param_info.ext_chan_offset;
8121                         ht_info->tx_chan_width = extra_param_info.tx_chan_width;
8122                         op_mode.val = (u16)
8123                             le16_to_cpu(ht_extra->operation_mode);
8124                         ht_info->operating_mode = op_mode.op_mode;
8125                         IWL_DEBUG_MAC80211("control channel %d\n",
8126                                             ht_extra->control_chan);
8127                 }
8128         } else
8129                 ht_info->is_ht = 0;
8130
8131         IWL_DEBUG_MAC80211("leave\n");
8132         return 0;
8133 }
8134
8135 static int iwl_mac_conf_ht(struct ieee80211_hw *hw,
8136                            struct ieee80211_ht_capability *ht_cap,
8137                            struct ieee80211_ht_additional_info *ht_extra)
8138 {
8139         struct iwl_priv *priv = hw->priv;
8140         int rs;
8141
8142         IWL_DEBUG_MAC80211("enter: \n");
8143
8144         rs = sta_ht_info_init(ht_cap, ht_extra, NULL, &priv->current_assoc_ht);
8145         iwl4965_set_rxon_chain(priv);
8146
8147         if (priv && priv->assoc_id &&
8148             (priv->iw_mode == IEEE80211_IF_TYPE_STA)) {
8149                 unsigned long flags;
8150
8151                 spin_lock_irqsave(&priv->lock, flags);
8152                 if (priv->beacon_int)
8153                         queue_work(priv->workqueue, &priv->post_associate.work);
8154                 else
8155                         priv->call_post_assoc_from_beacon = 1;
8156                 spin_unlock_irqrestore(&priv->lock, flags);
8157         }
8158
8159         IWL_DEBUG_MAC80211("leave: control channel %d\n",
8160                         ht_extra->control_chan);
8161         return rs;
8162
8163 }
8164
8165 static void iwl_set_ht_capab(struct ieee80211_hw *hw,
8166                              struct ieee80211_ht_capability *ht_cap,
8167                              u8 use_wide_chan)
8168 {
8169         union ht_cap_info cap;
8170         union ht_param_info param_info;
8171
8172         memset(&cap, 0, sizeof(union ht_cap_info));
8173         memset(&param_info, 0, sizeof(union ht_param_info));
8174
8175         cap.maximal_amsdu_size = HT_IE_MAX_AMSDU_SIZE_4K;
8176         cap.green_field = 1;
8177         cap.short_GI20 = 1;
8178         cap.short_GI40 = 1;
8179         cap.supported_chan_width_set = use_wide_chan;
8180         cap.mimo_power_save_mode = 0x3;
8181
8182         param_info.max_rx_ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
8183         param_info.mpdu_density = CFG_HT_MPDU_DENSITY_DEF;
8184         ht_cap->capabilities_info = (__le16) cpu_to_le16(cap.val);
8185         ht_cap->mac_ht_params_info = (u8) param_info.val;
8186
8187         ht_cap->supported_mcs_set[0] = 0xff;
8188         ht_cap->supported_mcs_set[1] = 0xff;
8189         ht_cap->supported_mcs_set[4] =
8190             (cap.supported_chan_width_set) ? 0x1: 0x0;
8191 }
8192
8193 static void iwl_mac_get_ht_capab(struct ieee80211_hw *hw,
8194                                  struct ieee80211_ht_capability *ht_cap)
8195 {
8196         u8 use_wide_channel = 1;
8197         struct iwl_priv *priv = hw->priv;
8198
8199         IWL_DEBUG_MAC80211("enter: \n");
8200         if (priv->channel_width != IWL_CHANNEL_WIDTH_40MHZ)
8201                 use_wide_channel = 0;
8202
8203         /* no fat tx allowed on 2.4GHZ */
8204         if (priv->phymode != MODE_IEEE80211A)
8205                 use_wide_channel = 0;
8206
8207         iwl_set_ht_capab(hw, ht_cap, use_wide_channel);
8208         IWL_DEBUG_MAC80211("leave: \n");
8209 }
8210 #endif /*CONFIG_IWLWIFI_HT*/
8211
8212 /*****************************************************************************
8213  *
8214  * sysfs attributes
8215  *
8216  *****************************************************************************/
8217
8218 #ifdef CONFIG_IWLWIFI_DEBUG
8219
8220 /*
8221  * The following adds a new attribute to the sysfs representation
8222  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
8223  * used for controlling the debug level.
8224  *
8225  * See the level definitions in iwl for details.
8226  */
8227
8228 static ssize_t show_debug_level(struct device_driver *d, char *buf)
8229 {
8230         return sprintf(buf, "0x%08X\n", iwl_debug_level);
8231 }
8232 static ssize_t store_debug_level(struct device_driver *d,
8233                                  const char *buf, size_t count)
8234 {
8235         char *p = (char *)buf;
8236         u32 val;
8237
8238         val = simple_strtoul(p, &p, 0);
8239         if (p == buf)
8240                 printk(KERN_INFO DRV_NAME
8241                        ": %s is not in hex or decimal form.\n", buf);
8242         else
8243                 iwl_debug_level = val;
8244
8245         return strnlen(buf, count);
8246 }
8247
8248 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
8249                    show_debug_level, store_debug_level);
8250
8251 #endif /* CONFIG_IWLWIFI_DEBUG */
8252
8253 static ssize_t show_rf_kill(struct device *d,
8254                             struct device_attribute *attr, char *buf)
8255 {
8256         /*
8257          * 0 - RF kill not enabled
8258          * 1 - SW based RF kill active (sysfs)
8259          * 2 - HW based RF kill active
8260          * 3 - Both HW and SW based RF kill active
8261          */
8262         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8263         int val = (test_bit(STATUS_RF_KILL_SW, &priv->status) ? 0x1 : 0x0) |
8264                   (test_bit(STATUS_RF_KILL_HW, &priv->status) ? 0x2 : 0x0);
8265
8266         return sprintf(buf, "%i\n", val);
8267 }
8268
8269 static ssize_t store_rf_kill(struct device *d,
8270                              struct device_attribute *attr,
8271                              const char *buf, size_t count)
8272 {
8273         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8274
8275         mutex_lock(&priv->mutex);
8276         iwl_radio_kill_sw(priv, buf[0] == '1');
8277         mutex_unlock(&priv->mutex);
8278
8279         return count;
8280 }
8281
8282 static DEVICE_ATTR(rf_kill, S_IWUSR | S_IRUGO, show_rf_kill, store_rf_kill);
8283
8284 static ssize_t show_temperature(struct device *d,
8285                                 struct device_attribute *attr, char *buf)
8286 {
8287         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8288
8289         if (!iwl_is_alive(priv))
8290                 return -EAGAIN;
8291
8292         return sprintf(buf, "%d\n", iwl_hw_get_temperature(priv));
8293 }
8294
8295 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
8296
8297 static ssize_t show_rs_window(struct device *d,
8298                               struct device_attribute *attr,
8299                               char *buf)
8300 {
8301         struct iwl_priv *priv = d->driver_data;
8302         return iwl_fill_rs_info(priv->hw, buf, IWL_AP_ID);
8303 }
8304 static DEVICE_ATTR(rs_window, S_IRUGO, show_rs_window, NULL);
8305
8306 static ssize_t show_tx_power(struct device *d,
8307                              struct device_attribute *attr, char *buf)
8308 {
8309         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8310         return sprintf(buf, "%d\n", priv->user_txpower_limit);
8311 }
8312
8313 static ssize_t store_tx_power(struct device *d,
8314                               struct device_attribute *attr,
8315                               const char *buf, size_t count)
8316 {
8317         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8318         char *p = (char *)buf;
8319         u32 val;
8320
8321         val = simple_strtoul(p, &p, 10);
8322         if (p == buf)
8323                 printk(KERN_INFO DRV_NAME
8324                        ": %s is not in decimal form.\n", buf);
8325         else
8326                 iwl_hw_reg_set_txpower(priv, val);
8327
8328         return count;
8329 }
8330
8331 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
8332
8333 static ssize_t show_flags(struct device *d,
8334                           struct device_attribute *attr, char *buf)
8335 {
8336         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8337
8338         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
8339 }
8340
8341 static ssize_t store_flags(struct device *d,
8342                            struct device_attribute *attr,
8343                            const char *buf, size_t count)
8344 {
8345         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8346         u32 flags = simple_strtoul(buf, NULL, 0);
8347
8348         mutex_lock(&priv->mutex);
8349         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
8350                 /* Cancel any currently running scans... */
8351                 if (iwl_scan_cancel_timeout(priv, 100))
8352                         IWL_WARNING("Could not cancel scan.\n");
8353                 else {
8354                         IWL_DEBUG_INFO("Committing rxon.flags = 0x%04X\n",
8355                                        flags);
8356                         priv->staging_rxon.flags = cpu_to_le32(flags);
8357                         iwl_commit_rxon(priv);
8358                 }
8359         }
8360         mutex_unlock(&priv->mutex);
8361
8362         return count;
8363 }
8364
8365 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
8366
8367 static ssize_t show_filter_flags(struct device *d,
8368                                  struct device_attribute *attr, char *buf)
8369 {
8370         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8371
8372         return sprintf(buf, "0x%04X\n",
8373                 le32_to_cpu(priv->active_rxon.filter_flags));
8374 }
8375
8376 static ssize_t store_filter_flags(struct device *d,
8377                                   struct device_attribute *attr,
8378                                   const char *buf, size_t count)
8379 {
8380         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8381         u32 filter_flags = simple_strtoul(buf, NULL, 0);
8382
8383         mutex_lock(&priv->mutex);
8384         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
8385                 /* Cancel any currently running scans... */
8386                 if (iwl_scan_cancel_timeout(priv, 100))
8387                         IWL_WARNING("Could not cancel scan.\n");
8388                 else {
8389                         IWL_DEBUG_INFO("Committing rxon.filter_flags = "
8390                                        "0x%04X\n", filter_flags);
8391                         priv->staging_rxon.filter_flags =
8392                                 cpu_to_le32(filter_flags);
8393                         iwl_commit_rxon(priv);
8394                 }
8395         }
8396         mutex_unlock(&priv->mutex);
8397
8398         return count;
8399 }
8400
8401 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
8402                    store_filter_flags);
8403
8404 static ssize_t show_tune(struct device *d,
8405                          struct device_attribute *attr, char *buf)
8406 {
8407         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8408
8409         return sprintf(buf, "0x%04X\n",
8410                        (priv->phymode << 8) |
8411                         le16_to_cpu(priv->active_rxon.channel));
8412 }
8413
8414 static void iwl_set_flags_for_phymode(struct iwl_priv *priv, u8 phymode);
8415
8416 static ssize_t store_tune(struct device *d,
8417                           struct device_attribute *attr,
8418                           const char *buf, size_t count)
8419 {
8420         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8421         char *p = (char *)buf;
8422         u16 tune = simple_strtoul(p, &p, 0);
8423         u8 phymode = (tune >> 8) & 0xff;
8424         u16 channel = tune & 0xff;
8425
8426         IWL_DEBUG_INFO("Tune request to:%d channel:%d\n", phymode, channel);
8427
8428         mutex_lock(&priv->mutex);
8429         if ((le16_to_cpu(priv->staging_rxon.channel) != channel) ||
8430             (priv->phymode != phymode)) {
8431                 const struct iwl_channel_info *ch_info;
8432
8433                 ch_info = iwl_get_channel_info(priv, phymode, channel);
8434                 if (!ch_info) {
8435                         IWL_WARNING("Requested invalid phymode/channel "
8436                                     "combination: %d %d\n", phymode, channel);
8437                         mutex_unlock(&priv->mutex);
8438                         return -EINVAL;
8439                 }
8440
8441                 /* Cancel any currently running scans... */
8442                 if (iwl_scan_cancel_timeout(priv, 100))
8443                         IWL_WARNING("Could not cancel scan.\n");
8444                 else {
8445                         IWL_DEBUG_INFO("Committing phymode and "
8446                                        "rxon.channel = %d %d\n",
8447                                        phymode, channel);
8448
8449                         iwl_set_rxon_channel(priv, phymode, channel);
8450                         iwl_set_flags_for_phymode(priv, phymode);
8451
8452                         iwl_set_rate(priv);
8453                         iwl_commit_rxon(priv);
8454                 }
8455         }
8456         mutex_unlock(&priv->mutex);
8457
8458         return count;
8459 }
8460
8461 static DEVICE_ATTR(tune, S_IWUSR | S_IRUGO, show_tune, store_tune);
8462
8463 #ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
8464
8465 static ssize_t show_measurement(struct device *d,
8466                                 struct device_attribute *attr, char *buf)
8467 {
8468         struct iwl_priv *priv = dev_get_drvdata(d);
8469         struct iwl_spectrum_notification measure_report;
8470         u32 size = sizeof(measure_report), len = 0, ofs = 0;
8471         u8 *data = (u8 *) & measure_report;
8472         unsigned long flags;
8473
8474         spin_lock_irqsave(&priv->lock, flags);
8475         if (!(priv->measurement_status & MEASUREMENT_READY)) {
8476                 spin_unlock_irqrestore(&priv->lock, flags);
8477                 return 0;
8478         }
8479         memcpy(&measure_report, &priv->measure_report, size);
8480         priv->measurement_status = 0;
8481         spin_unlock_irqrestore(&priv->lock, flags);
8482
8483         while (size && (PAGE_SIZE - len)) {
8484                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
8485                                    PAGE_SIZE - len, 1);
8486                 len = strlen(buf);
8487                 if (PAGE_SIZE - len)
8488                         buf[len++] = '\n';
8489
8490                 ofs += 16;
8491                 size -= min(size, 16U);
8492         }
8493
8494         return len;
8495 }
8496
8497 static ssize_t store_measurement(struct device *d,
8498                                  struct device_attribute *attr,
8499                                  const char *buf, size_t count)
8500 {
8501         struct iwl_priv *priv = dev_get_drvdata(d);
8502         struct ieee80211_measurement_params params = {
8503                 .channel = le16_to_cpu(priv->active_rxon.channel),
8504                 .start_time = cpu_to_le64(priv->last_tsf),
8505                 .duration = cpu_to_le16(1),
8506         };
8507         u8 type = IWL_MEASURE_BASIC;
8508         u8 buffer[32];
8509         u8 channel;
8510
8511         if (count) {
8512                 char *p = buffer;
8513                 strncpy(buffer, buf, min(sizeof(buffer), count));
8514                 channel = simple_strtoul(p, NULL, 0);
8515                 if (channel)
8516                         params.channel = channel;
8517
8518                 p = buffer;
8519                 while (*p && *p != ' ')
8520                         p++;
8521                 if (*p)
8522                         type = simple_strtoul(p + 1, NULL, 0);
8523         }
8524
8525         IWL_DEBUG_INFO("Invoking measurement of type %d on "
8526                        "channel %d (for '%s')\n", type, params.channel, buf);
8527         iwl_get_measurement(priv, &params, type);
8528
8529         return count;
8530 }
8531
8532 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
8533                    show_measurement, store_measurement);
8534 #endif /* CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT */
8535
8536 static ssize_t store_retry_rate(struct device *d,
8537                                 struct device_attribute *attr,
8538                                 const char *buf, size_t count)
8539 {
8540         struct iwl_priv *priv = dev_get_drvdata(d);
8541
8542         priv->retry_rate = simple_strtoul(buf, NULL, 0);
8543         if (priv->retry_rate <= 0)
8544                 priv->retry_rate = 1;
8545
8546         return count;
8547 }
8548
8549 static ssize_t show_retry_rate(struct device *d,
8550                                struct device_attribute *attr, char *buf)
8551 {
8552         struct iwl_priv *priv = dev_get_drvdata(d);
8553         return sprintf(buf, "%d", priv->retry_rate);
8554 }
8555
8556 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
8557                    store_retry_rate);
8558
8559 static ssize_t store_power_level(struct device *d,
8560                                  struct device_attribute *attr,
8561                                  const char *buf, size_t count)
8562 {
8563         struct iwl_priv *priv = dev_get_drvdata(d);
8564         int rc;
8565         int mode;
8566
8567         mode = simple_strtoul(buf, NULL, 0);
8568         mutex_lock(&priv->mutex);
8569
8570         if (!iwl_is_ready(priv)) {
8571                 rc = -EAGAIN;
8572                 goto out;
8573         }
8574
8575         if ((mode < 1) || (mode > IWL_POWER_LIMIT) || (mode == IWL_POWER_AC))
8576                 mode = IWL_POWER_AC;
8577         else
8578                 mode |= IWL_POWER_ENABLED;
8579
8580         if (mode != priv->power_mode) {
8581                 rc = iwl_send_power_mode(priv, IWL_POWER_LEVEL(mode));
8582                 if (rc) {
8583                         IWL_DEBUG_MAC80211("failed setting power mode.\n");
8584                         goto out;
8585                 }
8586                 priv->power_mode = mode;
8587         }
8588
8589         rc = count;
8590
8591  out:
8592         mutex_unlock(&priv->mutex);
8593         return rc;
8594 }
8595
8596 #define MAX_WX_STRING 80
8597
8598 /* Values are in microsecond */
8599 static const s32 timeout_duration[] = {
8600         350000,
8601         250000,
8602         75000,
8603         37000,
8604         25000,
8605 };
8606 static const s32 period_duration[] = {
8607         400000,
8608         700000,
8609         1000000,
8610         1000000,
8611         1000000
8612 };
8613
8614 static ssize_t show_power_level(struct device *d,
8615                                 struct device_attribute *attr, char *buf)
8616 {
8617         struct iwl_priv *priv = dev_get_drvdata(d);
8618         int level = IWL_POWER_LEVEL(priv->power_mode);
8619         char *p = buf;
8620
8621         p += sprintf(p, "%d ", level);
8622         switch (level) {
8623         case IWL_POWER_MODE_CAM:
8624         case IWL_POWER_AC:
8625                 p += sprintf(p, "(AC)");
8626                 break;
8627         case IWL_POWER_BATTERY:
8628                 p += sprintf(p, "(BATTERY)");
8629                 break;
8630         default:
8631                 p += sprintf(p,
8632                              "(Timeout %dms, Period %dms)",
8633                              timeout_duration[level - 1] / 1000,
8634                              period_duration[level - 1] / 1000);
8635         }
8636
8637         if (!(priv->power_mode & IWL_POWER_ENABLED))
8638                 p += sprintf(p, " OFF\n");
8639         else
8640                 p += sprintf(p, " \n");
8641
8642         return (p - buf + 1);
8643
8644 }
8645
8646 static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR, show_power_level,
8647                    store_power_level);
8648
8649 static ssize_t show_channels(struct device *d,
8650                              struct device_attribute *attr, char *buf)
8651 {
8652         struct iwl_priv *priv = dev_get_drvdata(d);
8653         int len = 0, i;
8654         struct ieee80211_channel *channels = NULL;
8655         const struct ieee80211_hw_mode *hw_mode = NULL;
8656         int count = 0;
8657
8658         if (!iwl_is_ready(priv))
8659                 return -EAGAIN;
8660
8661         hw_mode = iwl_get_hw_mode(priv, MODE_IEEE80211G);
8662         if (!hw_mode)
8663                 hw_mode = iwl_get_hw_mode(priv, MODE_IEEE80211B);
8664         if (hw_mode) {
8665                 channels = hw_mode->channels;
8666                 count = hw_mode->num_channels;
8667         }
8668
8669         len +=
8670             sprintf(&buf[len],
8671                     "Displaying %d channels in 2.4GHz band "
8672                     "(802.11bg):\n", count);
8673
8674         for (i = 0; i < count; i++)
8675                 len += sprintf(&buf[len], "%d: %ddBm: BSS%s%s, %s.\n",
8676                                channels[i].chan,
8677                                channels[i].power_level,
8678                                channels[i].
8679                                flag & IEEE80211_CHAN_W_RADAR_DETECT ?
8680                                " (IEEE 802.11h required)" : "",
8681                                (!(channels[i].flag & IEEE80211_CHAN_W_IBSS)
8682                                 || (channels[i].
8683                                     flag &
8684                                     IEEE80211_CHAN_W_RADAR_DETECT)) ? "" :
8685                                ", IBSS",
8686                                channels[i].
8687                                flag & IEEE80211_CHAN_W_ACTIVE_SCAN ?
8688                                "active/passive" : "passive only");
8689
8690         hw_mode = iwl_get_hw_mode(priv, MODE_IEEE80211A);
8691         if (hw_mode) {
8692                 channels = hw_mode->channels;
8693                 count = hw_mode->num_channels;
8694         } else {
8695                 channels = NULL;
8696                 count = 0;
8697         }
8698
8699         len += sprintf(&buf[len], "Displaying %d channels in 5.2GHz band "
8700                        "(802.11a):\n", count);
8701
8702         for (i = 0; i < count; i++)
8703                 len += sprintf(&buf[len], "%d: %ddBm: BSS%s%s, %s.\n",
8704                                channels[i].chan,
8705                                channels[i].power_level,
8706                                channels[i].
8707                                flag & IEEE80211_CHAN_W_RADAR_DETECT ?
8708                                " (IEEE 802.11h required)" : "",
8709                                (!(channels[i].flag & IEEE80211_CHAN_W_IBSS)
8710                                 || (channels[i].
8711                                     flag &
8712                                     IEEE80211_CHAN_W_RADAR_DETECT)) ? "" :
8713                                ", IBSS",
8714                                channels[i].
8715                                flag & IEEE80211_CHAN_W_ACTIVE_SCAN ?
8716                                "active/passive" : "passive only");
8717
8718         return len;
8719 }
8720
8721 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
8722
8723 static ssize_t show_statistics(struct device *d,
8724                                struct device_attribute *attr, char *buf)
8725 {
8726         struct iwl_priv *priv = dev_get_drvdata(d);
8727         u32 size = sizeof(struct iwl_notif_statistics);
8728         u32 len = 0, ofs = 0;
8729         u8 *data = (u8 *) & priv->statistics;
8730         int rc = 0;
8731
8732         if (!iwl_is_alive(priv))
8733                 return -EAGAIN;
8734
8735         mutex_lock(&priv->mutex);
8736         rc = iwl_send_statistics_request(priv);
8737         mutex_unlock(&priv->mutex);
8738
8739         if (rc) {
8740                 len = sprintf(buf,
8741                               "Error sending statistics request: 0x%08X\n", rc);
8742                 return len;
8743         }
8744
8745         while (size && (PAGE_SIZE - len)) {
8746                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
8747                                    PAGE_SIZE - len, 1);
8748                 len = strlen(buf);
8749                 if (PAGE_SIZE - len)
8750                         buf[len++] = '\n';
8751
8752                 ofs += 16;
8753                 size -= min(size, 16U);
8754         }
8755
8756         return len;
8757 }
8758
8759 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
8760
8761 static ssize_t show_antenna(struct device *d,
8762                             struct device_attribute *attr, char *buf)
8763 {
8764         struct iwl_priv *priv = dev_get_drvdata(d);
8765
8766         if (!iwl_is_alive(priv))
8767                 return -EAGAIN;
8768
8769         return sprintf(buf, "%d\n", priv->antenna);
8770 }
8771
8772 static ssize_t store_antenna(struct device *d,
8773                              struct device_attribute *attr,
8774                              const char *buf, size_t count)
8775 {
8776         int ant;
8777         struct iwl_priv *priv = dev_get_drvdata(d);
8778
8779         if (count == 0)
8780                 return 0;
8781
8782         if (sscanf(buf, "%1i", &ant) != 1) {
8783                 IWL_DEBUG_INFO("not in hex or decimal form.\n");
8784                 return count;
8785         }
8786
8787         if ((ant >= 0) && (ant <= 2)) {
8788                 IWL_DEBUG_INFO("Setting antenna select to %d.\n", ant);
8789                 priv->antenna = (enum iwl_antenna)ant;
8790         } else
8791                 IWL_DEBUG_INFO("Bad antenna select value %d.\n", ant);
8792
8793
8794         return count;
8795 }
8796
8797 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
8798
8799 static ssize_t show_status(struct device *d,
8800                            struct device_attribute *attr, char *buf)
8801 {
8802         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
8803         if (!iwl_is_alive(priv))
8804                 return -EAGAIN;
8805         return sprintf(buf, "0x%08x\n", (int)priv->status);
8806 }
8807
8808 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
8809
8810 static ssize_t dump_error_log(struct device *d,
8811                               struct device_attribute *attr,
8812                               const char *buf, size_t count)
8813 {
8814         char *p = (char *)buf;
8815
8816         if (p[0] == '1')
8817                 iwl_dump_nic_error_log((struct iwl_priv *)d->driver_data);
8818
8819         return strnlen(buf, count);
8820 }
8821
8822 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
8823
8824 static ssize_t dump_event_log(struct device *d,
8825                               struct device_attribute *attr,
8826                               const char *buf, size_t count)
8827 {
8828         char *p = (char *)buf;
8829
8830         if (p[0] == '1')
8831                 iwl_dump_nic_event_log((struct iwl_priv *)d->driver_data);
8832
8833         return strnlen(buf, count);
8834 }
8835
8836 static DEVICE_ATTR(dump_events, S_IWUSR, NULL, dump_event_log);
8837
8838 /*****************************************************************************
8839  *
8840  * driver setup and teardown
8841  *
8842  *****************************************************************************/
8843
8844 static void iwl_setup_deferred_work(struct iwl_priv *priv)
8845 {
8846         priv->workqueue = create_workqueue(DRV_NAME);
8847
8848         init_waitqueue_head(&priv->wait_command_queue);
8849
8850         INIT_WORK(&priv->up, iwl_bg_up);
8851         INIT_WORK(&priv->restart, iwl_bg_restart);
8852         INIT_WORK(&priv->rx_replenish, iwl_bg_rx_replenish);
8853         INIT_WORK(&priv->scan_completed, iwl_bg_scan_completed);
8854         INIT_WORK(&priv->request_scan, iwl_bg_request_scan);
8855         INIT_WORK(&priv->abort_scan, iwl_bg_abort_scan);
8856         INIT_WORK(&priv->rf_kill, iwl_bg_rf_kill);
8857         INIT_WORK(&priv->beacon_update, iwl_bg_beacon_update);
8858         INIT_DELAYED_WORK(&priv->post_associate, iwl_bg_post_associate);
8859         INIT_DELAYED_WORK(&priv->init_alive_start, iwl_bg_init_alive_start);
8860         INIT_DELAYED_WORK(&priv->alive_start, iwl_bg_alive_start);
8861         INIT_DELAYED_WORK(&priv->scan_check, iwl_bg_scan_check);
8862
8863         iwl_hw_setup_deferred_work(priv);
8864
8865         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
8866                      iwl_irq_tasklet, (unsigned long)priv);
8867 }
8868
8869 static void iwl_cancel_deferred_work(struct iwl_priv *priv)
8870 {
8871         iwl_hw_cancel_deferred_work(priv);
8872
8873         cancel_delayed_work_sync(&priv->init_alive_start);
8874         cancel_delayed_work(&priv->scan_check);
8875         cancel_delayed_work(&priv->alive_start);
8876         cancel_delayed_work(&priv->post_associate);
8877         cancel_work_sync(&priv->beacon_update);
8878 }
8879
8880 static struct attribute *iwl_sysfs_entries[] = {
8881         &dev_attr_antenna.attr,
8882         &dev_attr_channels.attr,
8883         &dev_attr_dump_errors.attr,
8884         &dev_attr_dump_events.attr,
8885         &dev_attr_flags.attr,
8886         &dev_attr_filter_flags.attr,
8887 #ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
8888         &dev_attr_measurement.attr,
8889 #endif
8890         &dev_attr_power_level.attr,
8891         &dev_attr_retry_rate.attr,
8892         &dev_attr_rf_kill.attr,
8893         &dev_attr_rs_window.attr,
8894         &dev_attr_statistics.attr,
8895         &dev_attr_status.attr,
8896         &dev_attr_temperature.attr,
8897         &dev_attr_tune.attr,
8898         &dev_attr_tx_power.attr,
8899
8900         NULL
8901 };
8902
8903 static struct attribute_group iwl_attribute_group = {
8904         .name = NULL,           /* put in device directory */
8905         .attrs = iwl_sysfs_entries,
8906 };
8907
8908 static struct ieee80211_ops iwl_hw_ops = {
8909         .tx = iwl_mac_tx,
8910         .start = iwl_mac_start,
8911         .stop = iwl_mac_stop,
8912         .add_interface = iwl_mac_add_interface,
8913         .remove_interface = iwl_mac_remove_interface,
8914         .config = iwl_mac_config,
8915         .config_interface = iwl_mac_config_interface,
8916         .configure_filter = iwl_configure_filter,
8917         .set_key = iwl_mac_set_key,
8918         .get_stats = iwl_mac_get_stats,
8919         .get_tx_stats = iwl_mac_get_tx_stats,
8920         .conf_tx = iwl_mac_conf_tx,
8921         .get_tsf = iwl_mac_get_tsf,
8922         .reset_tsf = iwl_mac_reset_tsf,
8923         .beacon_update = iwl_mac_beacon_update,
8924 #ifdef CONFIG_IWLWIFI_HT
8925         .conf_ht = iwl_mac_conf_ht,
8926         .get_ht_capab = iwl_mac_get_ht_capab,
8927 #ifdef CONFIG_IWLWIFI_HT_AGG
8928         .ht_tx_agg_start = iwl_mac_ht_tx_agg_start,
8929         .ht_tx_agg_stop = iwl_mac_ht_tx_agg_stop,
8930         .ht_rx_agg_start = iwl_mac_ht_rx_agg_start,
8931         .ht_rx_agg_stop = iwl_mac_ht_rx_agg_stop,
8932 #endif  /* CONFIG_IWLWIFI_HT_AGG */
8933 #endif  /* CONFIG_IWLWIFI_HT */
8934         .hw_scan = iwl_mac_hw_scan
8935 };
8936
8937 static int iwl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
8938 {
8939         int err = 0;
8940         struct iwl_priv *priv;
8941         struct ieee80211_hw *hw;
8942         int i;
8943
8944         if (iwl_param_disable_hw_scan) {
8945                 IWL_DEBUG_INFO("Disabling hw_scan\n");
8946                 iwl_hw_ops.hw_scan = NULL;
8947         }
8948
8949         if ((iwl_param_queues_num > IWL_MAX_NUM_QUEUES) ||
8950             (iwl_param_queues_num < IWL_MIN_NUM_QUEUES)) {
8951                 IWL_ERROR("invalid queues_num, should be between %d and %d\n",
8952                           IWL_MIN_NUM_QUEUES, IWL_MAX_NUM_QUEUES);
8953                 err = -EINVAL;
8954                 goto out;
8955         }
8956
8957         /* mac80211 allocates memory for this device instance, including
8958          *   space for this driver's private structure */
8959         hw = ieee80211_alloc_hw(sizeof(struct iwl_priv), &iwl_hw_ops);
8960         if (hw == NULL) {
8961                 IWL_ERROR("Can not allocate network device\n");
8962                 err = -ENOMEM;
8963                 goto out;
8964         }
8965         SET_IEEE80211_DEV(hw, &pdev->dev);
8966
8967         hw->rate_control_algorithm = "iwl-4965-rs";
8968
8969         IWL_DEBUG_INFO("*** LOAD DRIVER ***\n");
8970         priv = hw->priv;
8971         priv->hw = hw;
8972
8973         priv->pci_dev = pdev;
8974         priv->antenna = (enum iwl_antenna)iwl_param_antenna;
8975 #ifdef CONFIG_IWLWIFI_DEBUG
8976         iwl_debug_level = iwl_param_debug;
8977         atomic_set(&priv->restrict_refcnt, 0);
8978 #endif
8979         priv->retry_rate = 1;
8980
8981         priv->ibss_beacon = NULL;
8982
8983         /* Tell mac80211 and its clients (e.g. Wireless Extensions)
8984          *   the range of signal quality values that we'll provide.
8985          * Negative values for level/noise indicate that we'll provide dBm.
8986          * For WE, at least, non-0 values here *enable* display of values
8987          *   in app (iwconfig). */
8988         hw->max_rssi = -20;     /* signal level, negative indicates dBm */
8989         hw->max_noise = -20;    /* noise level, negative indicates dBm */
8990         hw->max_signal = 100;   /* link quality indication (%) */
8991
8992         /* Tell mac80211 our Tx characteristics */
8993         hw->flags = IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE;
8994
8995         hw->queues = 4;
8996 #ifdef CONFIG_IWLWIFI_HT
8997 #ifdef CONFIG_IWLWIFI_HT_AGG
8998         hw->queues = 16;
8999 #endif /* CONFIG_IWLWIFI_HT_AGG */
9000 #endif /* CONFIG_IWLWIFI_HT */
9001
9002         spin_lock_init(&priv->lock);
9003         spin_lock_init(&priv->power_data.lock);
9004         spin_lock_init(&priv->sta_lock);
9005         spin_lock_init(&priv->hcmd_lock);
9006         spin_lock_init(&priv->lq_mngr.lock);
9007
9008         for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++)
9009                 INIT_LIST_HEAD(&priv->ibss_mac_hash[i]);
9010
9011         INIT_LIST_HEAD(&priv->free_frames);
9012
9013         mutex_init(&priv->mutex);
9014         if (pci_enable_device(pdev)) {
9015                 err = -ENODEV;
9016                 goto out_ieee80211_free_hw;
9017         }
9018
9019         pci_set_master(pdev);
9020
9021         iwl_clear_stations_table(priv);
9022
9023         priv->data_retry_limit = -1;
9024         priv->ieee_channels = NULL;
9025         priv->ieee_rates = NULL;
9026         priv->phymode = -1;
9027
9028         err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
9029         if (!err)
9030                 err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
9031         if (err) {
9032                 printk(KERN_WARNING DRV_NAME ": No suitable DMA available.\n");
9033                 goto out_pci_disable_device;
9034         }
9035
9036         pci_set_drvdata(pdev, priv);
9037         err = pci_request_regions(pdev, DRV_NAME);
9038         if (err)
9039                 goto out_pci_disable_device;
9040         /* We disable the RETRY_TIMEOUT register (0x41) to keep
9041          * PCI Tx retries from interfering with C3 CPU state */
9042         pci_write_config_byte(pdev, 0x41, 0x00);
9043         priv->hw_base = pci_iomap(pdev, 0, 0);
9044         if (!priv->hw_base) {
9045                 err = -ENODEV;
9046                 goto out_pci_release_regions;
9047         }
9048
9049         IWL_DEBUG_INFO("pci_resource_len = 0x%08llx\n",
9050                         (unsigned long long) pci_resource_len(pdev, 0));
9051         IWL_DEBUG_INFO("pci_resource_base = %p\n", priv->hw_base);
9052
9053         /* Initialize module parameter values here */
9054
9055         if (iwl_param_disable) {
9056                 set_bit(STATUS_RF_KILL_SW, &priv->status);
9057                 IWL_DEBUG_INFO("Radio disabled.\n");
9058         }
9059
9060         priv->iw_mode = IEEE80211_IF_TYPE_STA;
9061
9062         priv->ps_mode = 0;
9063         priv->use_ant_b_for_management_frame = 1; /* start with ant B */
9064         priv->is_ht_enabled = 1;
9065         priv->channel_width = IWL_CHANNEL_WIDTH_40MHZ;
9066         priv->valid_antenna = 0x7;      /* assume all 3 connected */
9067         priv->ps_mode = IWL_MIMO_PS_NONE;
9068         priv->cck_power_index_compensation = iwl_read32(
9069                 priv, CSR_HW_REV_WA_REG);
9070
9071         iwl4965_set_rxon_chain(priv);
9072
9073         printk(KERN_INFO DRV_NAME
9074                ": Detected Intel Wireless WiFi Link 4965AGN\n");
9075
9076         /* Device-specific setup */
9077         if (iwl_hw_set_hw_setting(priv)) {
9078                 IWL_ERROR("failed to set hw settings\n");
9079                 mutex_unlock(&priv->mutex);
9080                 goto out_iounmap;
9081         }
9082
9083 #ifdef CONFIG_IWLWIFI_QOS
9084         if (iwl_param_qos_enable)
9085                 priv->qos_data.qos_enable = 1;
9086
9087         iwl_reset_qos(priv);
9088
9089         priv->qos_data.qos_active = 0;
9090         priv->qos_data.qos_cap.val = 0;
9091 #endif /* CONFIG_IWLWIFI_QOS */
9092
9093         iwl_set_rxon_channel(priv, MODE_IEEE80211G, 6);
9094         iwl_setup_deferred_work(priv);
9095         iwl_setup_rx_handlers(priv);
9096
9097         priv->rates_mask = IWL_RATES_MASK;
9098         /* If power management is turned on, default to AC mode */
9099         priv->power_mode = IWL_POWER_AC;
9100         priv->user_txpower_limit = IWL_DEFAULT_TX_POWER;
9101
9102         pci_enable_msi(pdev);
9103
9104         err = request_irq(pdev->irq, iwl_isr, IRQF_SHARED, DRV_NAME, priv);
9105         if (err) {
9106                 IWL_ERROR("Error allocating IRQ %d\n", pdev->irq);
9107                 goto out_disable_msi;
9108         }
9109
9110         mutex_lock(&priv->mutex);
9111
9112         err = sysfs_create_group(&pdev->dev.kobj, &iwl_attribute_group);
9113         if (err) {
9114                 IWL_ERROR("failed to create sysfs device attributes\n");
9115                 mutex_unlock(&priv->mutex);
9116                 goto out_release_irq;
9117         }
9118
9119         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
9120          * ucode filename and max sizes are card-specific. */
9121         err = iwl_read_ucode(priv);
9122         if (err) {
9123                 IWL_ERROR("Could not read microcode: %d\n", err);
9124                 mutex_unlock(&priv->mutex);
9125                 goto out_pci_alloc;
9126         }
9127
9128         mutex_unlock(&priv->mutex);
9129
9130         IWL_DEBUG_INFO("Queing UP work.\n");
9131
9132         queue_work(priv->workqueue, &priv->up);
9133
9134         return 0;
9135
9136  out_pci_alloc:
9137         iwl_dealloc_ucode_pci(priv);
9138
9139         sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
9140
9141  out_release_irq:
9142         free_irq(pdev->irq, priv);
9143
9144  out_disable_msi:
9145         pci_disable_msi(pdev);
9146         destroy_workqueue(priv->workqueue);
9147         priv->workqueue = NULL;
9148         iwl_unset_hw_setting(priv);
9149
9150  out_iounmap:
9151         pci_iounmap(pdev, priv->hw_base);
9152  out_pci_release_regions:
9153         pci_release_regions(pdev);
9154  out_pci_disable_device:
9155         pci_disable_device(pdev);
9156         pci_set_drvdata(pdev, NULL);
9157  out_ieee80211_free_hw:
9158         ieee80211_free_hw(priv->hw);
9159  out:
9160         return err;
9161 }
9162
9163 static void iwl_pci_remove(struct pci_dev *pdev)
9164 {
9165         struct iwl_priv *priv = pci_get_drvdata(pdev);
9166         struct list_head *p, *q;
9167         int i;
9168
9169         if (!priv)
9170                 return;
9171
9172         IWL_DEBUG_INFO("*** UNLOAD DRIVER ***\n");
9173
9174         mutex_lock(&priv->mutex);
9175         set_bit(STATUS_EXIT_PENDING, &priv->status);
9176         __iwl_down(priv);
9177         mutex_unlock(&priv->mutex);
9178
9179         /* Free MAC hash list for ADHOC */
9180         for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++) {
9181                 list_for_each_safe(p, q, &priv->ibss_mac_hash[i]) {
9182                         list_del(p);
9183                         kfree(list_entry(p, struct iwl_ibss_seq, list));
9184                 }
9185         }
9186
9187         sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
9188
9189         iwl_dealloc_ucode_pci(priv);
9190
9191         if (priv->rxq.bd)
9192                 iwl_rx_queue_free(priv, &priv->rxq);
9193         iwl_hw_txq_ctx_free(priv);
9194
9195         iwl_unset_hw_setting(priv);
9196         iwl_clear_stations_table(priv);
9197
9198         if (priv->mac80211_registered) {
9199                 ieee80211_unregister_hw(priv->hw);
9200                 iwl_rate_control_unregister(priv->hw);
9201         }
9202
9203         /*netif_stop_queue(dev); */
9204         flush_workqueue(priv->workqueue);
9205
9206         /* ieee80211_unregister_hw calls iwl_mac_stop, which flushes
9207          * priv->workqueue... so we can't take down the workqueue
9208          * until now... */
9209         destroy_workqueue(priv->workqueue);
9210         priv->workqueue = NULL;
9211
9212         free_irq(pdev->irq, priv);
9213         pci_disable_msi(pdev);
9214         pci_iounmap(pdev, priv->hw_base);
9215         pci_release_regions(pdev);
9216         pci_disable_device(pdev);
9217         pci_set_drvdata(pdev, NULL);
9218
9219         kfree(priv->channel_info);
9220
9221         kfree(priv->ieee_channels);
9222         kfree(priv->ieee_rates);
9223
9224         if (priv->ibss_beacon)
9225                 dev_kfree_skb(priv->ibss_beacon);
9226
9227         ieee80211_free_hw(priv->hw);
9228 }
9229
9230 #ifdef CONFIG_PM
9231
9232 static int iwl_pci_suspend(struct pci_dev *pdev, pm_message_t state)
9233 {
9234         struct iwl_priv *priv = pci_get_drvdata(pdev);
9235
9236         mutex_lock(&priv->mutex);
9237
9238         set_bit(STATUS_IN_SUSPEND, &priv->status);
9239
9240         /* Take down the device; powers it off, etc. */
9241         __iwl_down(priv);
9242
9243         if (priv->mac80211_registered)
9244                 ieee80211_stop_queues(priv->hw);
9245
9246         pci_save_state(pdev);
9247         pci_disable_device(pdev);
9248         pci_set_power_state(pdev, PCI_D3hot);
9249
9250         mutex_unlock(&priv->mutex);
9251
9252         return 0;
9253 }
9254
9255 static void iwl_resume(struct iwl_priv *priv)
9256 {
9257         unsigned long flags;
9258
9259         /* The following it a temporary work around due to the
9260          * suspend / resume not fully initializing the NIC correctly.
9261          * Without all of the following, resume will not attempt to take
9262          * down the NIC (it shouldn't really need to) and will just try
9263          * and bring the NIC back up.  However that fails during the
9264          * ucode verification process.  This then causes iwl_down to be
9265          * called *after* iwl_hw_nic_init() has succeeded -- which
9266          * then lets the next init sequence succeed.  So, we've
9267          * replicated all of that NIC init code here... */
9268
9269         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
9270
9271         iwl_hw_nic_init(priv);
9272
9273         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
9274         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
9275                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
9276         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
9277         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
9278         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
9279
9280         /* tell the device to stop sending interrupts */
9281         iwl_disable_interrupts(priv);
9282
9283         spin_lock_irqsave(&priv->lock, flags);
9284         iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
9285
9286         if (!iwl_grab_restricted_access(priv)) {
9287                 iwl_write_restricted_reg(priv, APMG_CLK_DIS_REG,
9288                                          APMG_CLK_VAL_DMA_CLK_RQT);
9289                 iwl_release_restricted_access(priv);
9290         }
9291         spin_unlock_irqrestore(&priv->lock, flags);
9292
9293         udelay(5);
9294
9295         iwl_hw_nic_reset(priv);
9296
9297         /* Bring the device back up */
9298         clear_bit(STATUS_IN_SUSPEND, &priv->status);
9299         queue_work(priv->workqueue, &priv->up);
9300 }
9301
9302 static int iwl_pci_resume(struct pci_dev *pdev)
9303 {
9304         struct iwl_priv *priv = pci_get_drvdata(pdev);
9305         int err;
9306
9307         printk(KERN_INFO "Coming out of suspend...\n");
9308
9309         mutex_lock(&priv->mutex);
9310
9311         pci_set_power_state(pdev, PCI_D0);
9312         err = pci_enable_device(pdev);
9313         pci_restore_state(pdev);
9314
9315         /*
9316          * Suspend/Resume resets the PCI configuration space, so we have to
9317          * re-disable the RETRY_TIMEOUT register (0x41) to keep PCI Tx retries
9318          * from interfering with C3 CPU state. pci_restore_state won't help
9319          * here since it only restores the first 64 bytes pci config header.
9320          */
9321         pci_write_config_byte(pdev, 0x41, 0x00);
9322
9323         iwl_resume(priv);
9324         mutex_unlock(&priv->mutex);
9325
9326         return 0;
9327 }
9328
9329 #endif /* CONFIG_PM */
9330
9331 /*****************************************************************************
9332  *
9333  * driver and module entry point
9334  *
9335  *****************************************************************************/
9336
9337 static struct pci_driver iwl_driver = {
9338         .name = DRV_NAME,
9339         .id_table = iwl_hw_card_ids,
9340         .probe = iwl_pci_probe,
9341         .remove = __devexit_p(iwl_pci_remove),
9342 #ifdef CONFIG_PM
9343         .suspend = iwl_pci_suspend,
9344         .resume = iwl_pci_resume,
9345 #endif
9346 };
9347
9348 static int __init iwl_init(void)
9349 {
9350
9351         int ret;
9352         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
9353         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
9354         ret = pci_register_driver(&iwl_driver);
9355         if (ret) {
9356                 IWL_ERROR("Unable to initialize PCI module\n");
9357                 return ret;
9358         }
9359 #ifdef CONFIG_IWLWIFI_DEBUG
9360         ret = driver_create_file(&iwl_driver.driver, &driver_attr_debug_level);
9361         if (ret) {
9362                 IWL_ERROR("Unable to create driver sysfs file\n");
9363                 pci_unregister_driver(&iwl_driver);
9364                 return ret;
9365         }
9366 #endif
9367
9368         return ret;
9369 }
9370
9371 static void __exit iwl_exit(void)
9372 {
9373 #ifdef CONFIG_IWLWIFI_DEBUG
9374         driver_remove_file(&iwl_driver.driver, &driver_attr_debug_level);
9375 #endif
9376         pci_unregister_driver(&iwl_driver);
9377 }
9378
9379 module_param_named(antenna, iwl_param_antenna, int, 0444);
9380 MODULE_PARM_DESC(antenna, "select antenna (1=Main, 2=Aux, default 0 [both])");
9381 module_param_named(disable, iwl_param_disable, int, 0444);
9382 MODULE_PARM_DESC(disable, "manually disable the radio (default 0 [radio on])");
9383 module_param_named(hwcrypto, iwl_param_hwcrypto, int, 0444);
9384 MODULE_PARM_DESC(hwcrypto,
9385                  "using hardware crypto engine (default 0 [software])\n");
9386 module_param_named(debug, iwl_param_debug, int, 0444);
9387 MODULE_PARM_DESC(debug, "debug output mask");
9388 module_param_named(disable_hw_scan, iwl_param_disable_hw_scan, int, 0444);
9389 MODULE_PARM_DESC(disable_hw_scan, "disable hardware scanning (default 0)");
9390
9391 module_param_named(queues_num, iwl_param_queues_num, int, 0444);
9392 MODULE_PARM_DESC(queues_num, "number of hw queues.");
9393
9394 /* QoS */
9395 module_param_named(qos_enable, iwl_param_qos_enable, int, 0444);
9396 MODULE_PARM_DESC(qos_enable, "enable all QoS functionality");
9397
9398 module_exit(iwl_exit);
9399 module_init(iwl_init);