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

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2008 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 #include <linux/kernel.h>
  31 #include <linux/module.h>
  32 #include <linux/version.h>
  33 #include <linux/init.h>
  34 #include <linux/pci.h>
  35 #include <linux/dma-mapping.h>
  36 #include <linux/delay.h>
  37 #include <linux/skbuff.h>
  38 #include <linux/netdevice.h>
  39 #include <linux/wireless.h>
  40 #include <linux/firmware.h>
  41 #include <linux/etherdevice.h>
  42 #include <linux/if_arp.h>
  43
  44 #include <net/mac80211.h>
  45
  46 #include <asm/div64.h>
  47
  48 #include "iwl-eeprom.h"
  49 #include "iwl-4965.h"
  50 #include "iwl-core.h"
  51 #include "iwl-io.h"
  52 #include "iwl-helpers.h"
  53
  54 static int iwl4965_tx_queue_update_write_ptr(struct iwl_priv *priv,
  55                                   struct iwl4965_tx_queue *txq);
  56
  57 /******************************************************************************
  58  *
  59  * module boiler plate
  60  *
  61  ******************************************************************************/
  62
  63 /*
  64  * module name, copyright, version, etc.
  65  * NOTE: DRV_NAME is defined in iwlwifi.h for use by iwl-debug.h and printk
  66  */
  67
  68 #define DRV_DESCRIPTION "Intel(R) Wireless WiFi Link 4965AGN driver for Linux"
  69
  70 #ifdef CONFIG_IWLWIFI_DEBUG
  71 #define VD "d"
  72 #else
  73 #define VD
  74 #endif
  75
  76 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
  77 #define VS "s"
  78 #else
  79 #define VS
  80 #endif
  81
  82 #define DRV_VERSION     IWLWIFI_VERSION VD VS
  83
  84
  85 MODULE_DESCRIPTION(DRV_DESCRIPTION);
  86 MODULE_VERSION(DRV_VERSION);
  87 MODULE_AUTHOR(DRV_COPYRIGHT);
  88 MODULE_LICENSE("GPL");
  89
  90 __le16 *ieee80211_get_qos_ctrl(struct ieee80211_hdr *hdr)
  91 {
  92         u16 fc = le16_to_cpu(hdr->frame_control);
  93         int hdr_len = ieee80211_get_hdrlen(fc);
  94
  95         if ((fc & 0x00cc) == (IEEE80211_STYPE_QOS_DATA | IEEE80211_FTYPE_DATA))
  96                 return (__le16 *) ((u8 *) hdr + hdr_len - QOS_CONTROL_LEN);
  97         return NULL;
  98 }
  99
 100 static const struct ieee80211_supported_band *iwl4965_get_hw_mode(
 101                 struct iwl_priv *priv, enum ieee80211_band band)
 102 {
 103         return priv->hw->wiphy->bands[band];
 104 }
 105
 106 static int iwl4965_is_empty_essid(const char *essid, int essid_len)
 107 {
 108         /* Single white space is for Linksys APs */
 109         if (essid_len == 1 && essid[0] == ' ')
 110                 return 1;
 111
 112         /* Otherwise, if the entire essid is 0, we assume it is hidden */
 113         while (essid_len) {
 114                 essid_len--;
 115                 if (essid[essid_len] != '\0')
 116                         return 0;
 117         }
 118
 119         return 1;
 120 }
 121
 122 static const char *iwl4965_escape_essid(const char *essid, u8 essid_len)
 123 {
 124         static char escaped[IW_ESSID_MAX_SIZE * 2 + 1];
 125         const char *s = essid;
 126         char *d = escaped;
 127
 128         if (iwl4965_is_empty_essid(essid, essid_len)) {
 129                 memcpy(escaped, "<hidden>", sizeof("<hidden>"));
 130                 return escaped;
 131         }
 132
 133         essid_len = min(essid_len, (u8) IW_ESSID_MAX_SIZE);
 134         while (essid_len--) {
 135                 if (*s == '\0') {
 136                         *d++ = '\\';
 137                         *d++ = '0';
 138                         s++;
 139                 } else
 140                         *d++ = *s++;
 141         }
 142         *d = '\0';
 143         return escaped;
 144 }
 145
 146 /*************** DMA-QUEUE-GENERAL-FUNCTIONS  *****
 147  * DMA services
 148  *
 149  * Theory of operation
 150  *
 151  * A Tx or Rx queue resides in host DRAM, and is comprised of a circular buffer
 152  * of buffer descriptors, each of which points to one or more data buffers for
 153  * the device to read from or fill.  Driver and device exchange status of each
 154  * queue via "read" and "write" pointers.  Driver keeps minimum of 2 empty
 155  * entries in each circular buffer, to protect against confusing empty and full
 156  * queue states.
 157  *
 158  * The device reads or writes the data in the queues via the device's several
 159  * DMA/FIFO channels.  Each queue is mapped to a single DMA channel.
 160  *
 161  * For Tx queue, there are low mark and high mark limits. If, after queuing
 162  * the packet for Tx, free space become < low mark, Tx queue stopped. When
 163  * reclaiming packets (on 'tx done IRQ), if free space become > high mark,
 164  * Tx queue resumed.
 165  *
 166  * The 4965 operates with up to 17 queues:  One receive queue, one transmit
 167  * queue (#4) for sending commands to the device firmware, and 15 other
 168  * Tx queues that may be mapped to prioritized Tx DMA/FIFO channels.
 169  *
 170  * See more detailed info in iwl-4965-hw.h.
 171  ***************************************************/
 172
 173 int iwl4965_queue_space(const struct iwl4965_queue *q)
 174 {
 175         int s = q->read_ptr - q->write_ptr;
 176
 177         if (q->read_ptr > q->write_ptr)
 178                 s -= q->n_bd;
 179
 180         if (s <= 0)
 181                 s += q->n_window;
 182         /* keep some reserve to not confuse empty and full situations */
 183         s -= 2;
 184         if (s < 0)
 185                 s = 0;
 186         return s;
 187 }
 188
 189
 190 static inline int x2_queue_used(const struct iwl4965_queue *q, int i)
 191 {
 192         return q->write_ptr > q->read_ptr ?
 193                 (i >= q->read_ptr && i < q->write_ptr) :
 194                 !(i < q->read_ptr && i >= q->write_ptr);
 195 }
 196
 197 static inline u8 get_cmd_index(struct iwl4965_queue *q, u32 index, int is_huge)
 198 {
 199         /* This is for scan command, the big buffer at end of command array */
 200         if (is_huge)
 201                 return q->n_window;     /* must be power of 2 */
 202
 203         /* Otherwise, use normal size buffers */
 204         return index & (q->n_window - 1);
 205 }
 206
 207 /**
 208  * iwl4965_queue_init - Initialize queue's high/low-water and read/write indexes
 209  */
 210 static int iwl4965_queue_init(struct iwl_priv *priv, struct iwl4965_queue *q,
 211                           int count, int slots_num, u32 id)
 212 {
 213         q->n_bd = count;
 214         q->n_window = slots_num;
 215         q->id = id;
 216
 217         /* count must be power-of-two size, otherwise iwl_queue_inc_wrap
 218          * and iwl_queue_dec_wrap are broken. */
 219         BUG_ON(!is_power_of_2(count));
 220
 221         /* slots_num must be power-of-two size, otherwise
 222          * get_cmd_index is broken. */
 223         BUG_ON(!is_power_of_2(slots_num));
 224
 225         q->low_mark = q->n_window / 4;
 226         if (q->low_mark < 4)
 227                 q->low_mark = 4;
 228
 229         q->high_mark = q->n_window / 8;
 230         if (q->high_mark < 2)
 231                 q->high_mark = 2;
 232
 233         q->write_ptr = q->read_ptr = 0;
 234
 235         return 0;
 236 }
 237
 238 /**
 239  * iwl4965_tx_queue_alloc - Alloc driver data and TFD CB for one Tx/cmd queue
 240  */
 241 static int iwl4965_tx_queue_alloc(struct iwl_priv *priv,
 242                               struct iwl4965_tx_queue *txq, u32 id)
 243 {
 244         struct pci_dev *dev = priv->pci_dev;
 245
 246         /* Driver private data, only for Tx (not command) queues,
 247          * not shared with device. */
 248         if (id != IWL_CMD_QUEUE_NUM) {
 249                 txq->txb = kmalloc(sizeof(txq->txb[0]) *
 250                                    TFD_QUEUE_SIZE_MAX, GFP_KERNEL);
 251                 if (!txq->txb) {
 252                         IWL_ERROR("kmalloc for auxiliary BD "
 253                                   "structures failed\n");
 254                         goto error;
 255                 }
 256         } else
 257                 txq->txb = NULL;
 258
 259         /* Circular buffer of transmit frame descriptors (TFDs),
 260          * shared with device */
 261         txq->bd = pci_alloc_consistent(dev,
 262                         sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX,
 263                         &txq->q.dma_addr);
 264
 265         if (!txq->bd) {
 266                 IWL_ERROR("pci_alloc_consistent(%zd) failed\n",
 267                           sizeof(txq->bd[0]) * TFD_QUEUE_SIZE_MAX);
 268                 goto error;
 269         }
 270         txq->q.id = id;
 271
 272         return 0;
 273
 274  error:
 275         if (txq->txb) {
 276                 kfree(txq->txb);
 277                 txq->txb = NULL;
 278         }
 279
 280         return -ENOMEM;
 281 }
 282
 283 /**
 284  * iwl4965_tx_queue_init - Allocate and initialize one tx/cmd queue
 285  */
 286 int iwl4965_tx_queue_init(struct iwl_priv *priv,
 287                       struct iwl4965_tx_queue *txq, int slots_num, u32 txq_id)
 288 {
 289         struct pci_dev *dev = priv->pci_dev;
 290         int len;
 291         int rc = 0;
 292
 293         /*
 294          * Alloc buffer array for commands (Tx or other types of commands).
 295          * For the command queue (#4), allocate command space + one big
 296          * command for scan, since scan command is very huge; the system will
 297          * not have two scans at the same time, so only one is needed.
 298          * For normal Tx queues (all other queues), no super-size command
 299          * space is needed.
 300          */
 301         len = sizeof(struct iwl_cmd) * slots_num;
 302         if (txq_id == IWL_CMD_QUEUE_NUM)
 303                 len +=  IWL_MAX_SCAN_SIZE;
 304         txq->cmd = pci_alloc_consistent(dev, len, &txq->dma_addr_cmd);
 305         if (!txq->cmd)
 306                 return -ENOMEM;
 307
 308         /* Alloc driver data array and TFD circular buffer */
 309         rc = iwl4965_tx_queue_alloc(priv, txq, txq_id);
 310         if (rc) {
 311                 pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
 312
 313                 return -ENOMEM;
 314         }
 315         txq->need_update = 0;
 316
 317         /* TFD_QUEUE_SIZE_MAX must be power-of-two size, otherwise
 318          * iwl_queue_inc_wrap and iwl_queue_dec_wrap are broken. */
 319         BUILD_BUG_ON(TFD_QUEUE_SIZE_MAX & (TFD_QUEUE_SIZE_MAX - 1));
 320
 321         /* Initialize queue's high/low-water marks, and head/tail indexes */
 322         iwl4965_queue_init(priv, &txq->q, TFD_QUEUE_SIZE_MAX, slots_num, txq_id);
 323
 324         /* Tell device where to find queue */
 325         iwl4965_hw_tx_queue_init(priv, txq);
 326
 327         return 0;
 328 }
 329
 330 /**
 331  * iwl4965_tx_queue_free - Deallocate DMA queue.
 332  * @txq: Transmit queue to deallocate.
 333  *
 334  * Empty queue by removing and destroying all BD's.
 335  * Free all buffers.
 336  * 0-fill, but do not free "txq" descriptor structure.
 337  */
 338 void iwl4965_tx_queue_free(struct iwl_priv *priv, struct iwl4965_tx_queue *txq)
 339 {
 340         struct iwl4965_queue *q = &txq->q;
 341         struct pci_dev *dev = priv->pci_dev;
 342         int len;
 343
 344         if (q->n_bd == 0)
 345                 return;
 346
 347         /* first, empty all BD's */
 348         for (; q->write_ptr != q->read_ptr;
 349              q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd))
 350                 iwl4965_hw_txq_free_tfd(priv, txq);
 351
 352         len = sizeof(struct iwl_cmd) * q->n_window;
 353         if (q->id == IWL_CMD_QUEUE_NUM)
 354                 len += IWL_MAX_SCAN_SIZE;
 355
 356         /* De-alloc array of command/tx buffers */
 357         pci_free_consistent(dev, len, txq->cmd, txq->dma_addr_cmd);
 358
 359         /* De-alloc circular buffer of TFDs */
 360         if (txq->q.n_bd)
 361                 pci_free_consistent(dev, sizeof(struct iwl4965_tfd_frame) *
 362                                     txq->q.n_bd, txq->bd, txq->q.dma_addr);
 363
 364         /* De-alloc array of per-TFD driver data */
 365         if (txq->txb) {
 366                 kfree(txq->txb);
 367                 txq->txb = NULL;
 368         }
 369
 370         /* 0-fill queue descriptor structure */
 371         memset(txq, 0, sizeof(*txq));
 372 }
 373
 374 const u8 iwl4965_broadcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
 375
 376 /*************** STATION TABLE MANAGEMENT ****
 377  * mac80211 should be examined to determine if sta_info is duplicating
 378  * the functionality provided here
 379  */
 380
 381 /**************************************************************/
 382
 383 #if 0 /* temporary disable till we add real remove station */
 384 /**
 385  * iwl4965_remove_station - Remove driver's knowledge of station.
 386  *
 387  * NOTE:  This does not remove station from device's station table.
 388  */
 389 static u8 iwl4965_remove_station(struct iwl_priv *priv, const u8 *addr, int is_ap)
 390 {
 391         int index = IWL_INVALID_STATION;
 392         int i;
 393         unsigned long flags;
 394
 395         spin_lock_irqsave(&priv->sta_lock, flags);
 396
 397         if (is_ap)
 398                 index = IWL_AP_ID;
 399         else if (is_broadcast_ether_addr(addr))
 400                 index = priv->hw_setting.bcast_sta_id;
 401         else
 402                 for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++)
 403                         if (priv->stations[i].used &&
 404                             !compare_ether_addr(priv->stations[i].sta.sta.addr,
 405                                                 addr)) {
 406                                 index = i;
 407                                 break;
 408                         }
 409
 410         if (unlikely(index == IWL_INVALID_STATION))
 411                 goto out;
 412
 413         if (priv->stations[index].used) {
 414                 priv->stations[index].used = 0;
 415                 priv->num_stations--;
 416         }
 417
 418         BUG_ON(priv->num_stations < 0);
 419
 420 out:
 421         spin_unlock_irqrestore(&priv->sta_lock, flags);
 422         return 0;
 423 }
 424 #endif
 425
 426 /**
 427  * iwl4965_add_station_flags - Add station to tables in driver and device
 428  */
 429 u8 iwl4965_add_station_flags(struct iwl_priv *priv, const u8 *addr,
 430                                 int is_ap, u8 flags, void *ht_data)
 431 {
 432         int i;
 433         int index = IWL_INVALID_STATION;
 434         struct iwl4965_station_entry *station;
 435         unsigned long flags_spin;
 436         DECLARE_MAC_BUF(mac);
 437
 438         spin_lock_irqsave(&priv->sta_lock, flags_spin);
 439         if (is_ap)
 440                 index = IWL_AP_ID;
 441         else if (is_broadcast_ether_addr(addr))
 442                 index = priv->hw_setting.bcast_sta_id;
 443         else
 444                 for (i = IWL_STA_ID; i < priv->hw_setting.max_stations; i++) {
 445                         if (!compare_ether_addr(priv->stations[i].sta.sta.addr,
 446                                                 addr)) {
 447                                 index = i;
 448                                 break;
 449                         }
 450
 451                         if (!priv->stations[i].used &&
 452                             index == IWL_INVALID_STATION)
 453                                 index = i;
 454                 }
 455
 456
 457         /* These two conditions have the same outcome, but keep them separate
 458           since they have different meanings */
 459         if (unlikely(index == IWL_INVALID_STATION)) {
 460                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 461                 return index;
 462         }
 463
 464         if (priv->stations[index].used &&
 465             !compare_ether_addr(priv->stations[index].sta.sta.addr, addr)) {
 466                 spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 467                 return index;
 468         }
 469
 470
 471         IWL_DEBUG_ASSOC("Add STA ID %d: %s\n", index, print_mac(mac, addr));
 472         station = &priv->stations[index];
 473         station->used = 1;
 474         priv->num_stations++;
 475
 476         /* Set up the REPLY_ADD_STA command to send to device */
 477         memset(&station->sta, 0, sizeof(struct iwl4965_addsta_cmd));
 478         memcpy(station->sta.sta.addr, addr, ETH_ALEN);
 479         station->sta.mode = 0;
 480         station->sta.sta.sta_id = index;
 481         station->sta.station_flags = 0;
 482
 483 #ifdef CONFIG_IWL4965_HT
 484         /* BCAST station and IBSS stations do not work in HT mode */
 485         if (index != priv->hw_setting.bcast_sta_id &&
 486             priv->iw_mode != IEEE80211_IF_TYPE_IBSS)
 487                 iwl4965_set_ht_add_station(priv, index,
 488                                  (struct ieee80211_ht_info *) ht_data);
 489 #endif /*CONFIG_IWL4965_HT*/
 490
 491         spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
 492
 493         /* Add station to device's station table */
 494         iwl4965_send_add_station(priv, &station->sta, flags);
 495         return index;
 496
 497 }
 498
 499
 500
 501 /*************** HOST COMMAND QUEUE FUNCTIONS   *****/
 502
 503 /**
 504  * iwl4965_enqueue_hcmd - enqueue a uCode command
 505  * @priv: device private data point
 506  * @cmd: a point to the ucode command structure
 507  *
 508  * The function returns < 0 values to indicate the operation is
 509  * failed. On success, it turns the index (> 0) of command in the
 510  * command queue.
 511  */
 512 int iwl4965_enqueue_hcmd(struct iwl_priv *priv, struct iwl_host_cmd *cmd)
 513 {
 514         struct iwl4965_tx_queue *txq = &priv->txq[IWL_CMD_QUEUE_NUM];
 515         struct iwl4965_queue *q = &txq->q;
 516         struct iwl4965_tfd_frame *tfd;
 517         u32 *control_flags;
 518         struct iwl_cmd *out_cmd;
 519         u32 idx;
 520         u16 fix_size = (u16)(cmd->len + sizeof(out_cmd->hdr));
 521         dma_addr_t phys_addr;
 522         int ret;
 523         unsigned long flags;
 524
 525         /* If any of the command structures end up being larger than
 526          * the TFD_MAX_PAYLOAD_SIZE, and it sent as a 'small' command then
 527          * we will need to increase the size of the TFD entries */
 528         BUG_ON((fix_size > TFD_MAX_PAYLOAD_SIZE) &&
 529                !(cmd->meta.flags & CMD_SIZE_HUGE));
 530
 531         if (iwl_is_rfkill(priv)) {
 532                 IWL_DEBUG_INFO("Not sending command - RF KILL");
 533                 return -EIO;
 534         }
 535
 536         if (iwl4965_queue_space(q) < ((cmd->meta.flags & CMD_ASYNC) ? 2 : 1)) {
 537                 IWL_ERROR("No space for Tx\n");
 538                 return -ENOSPC;
 539         }
 540
 541         spin_lock_irqsave(&priv->hcmd_lock, flags);
 542
 543         tfd = &txq->bd[q->write_ptr];
 544         memset(tfd, 0, sizeof(*tfd));
 545
 546         control_flags = (u32 *) tfd;
 547
 548         idx = get_cmd_index(q, q->write_ptr, cmd->meta.flags & CMD_SIZE_HUGE);
 549         out_cmd = &txq->cmd[idx];
 550
 551         out_cmd->hdr.cmd = cmd->id;
 552         memcpy(&out_cmd->meta, &cmd->meta, sizeof(cmd->meta));
 553         memcpy(&out_cmd->cmd.payload, cmd->data, cmd->len);
 554
 555         /* At this point, the out_cmd now has all of the incoming cmd
 556          * information */
 557
 558         out_cmd->hdr.flags = 0;
 559         out_cmd->hdr.sequence = cpu_to_le16(QUEUE_TO_SEQ(IWL_CMD_QUEUE_NUM) |
 560                         INDEX_TO_SEQ(q->write_ptr));
 561         if (out_cmd->meta.flags & CMD_SIZE_HUGE)
 562                 out_cmd->hdr.sequence |= cpu_to_le16(SEQ_HUGE_FRAME);
 563
 564         phys_addr = txq->dma_addr_cmd + sizeof(txq->cmd[0]) * idx +
 565                         offsetof(struct iwl_cmd, hdr);
 566         iwl4965_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, fix_size);
 567
 568         IWL_DEBUG_HC("Sending command %s (#%x), seq: 0x%04X, "
 569                      "%d bytes at %d[%d]:%d\n",
 570                      get_cmd_string(out_cmd->hdr.cmd),
 571                      out_cmd->hdr.cmd, le16_to_cpu(out_cmd->hdr.sequence),
 572                      fix_size, q->write_ptr, idx, IWL_CMD_QUEUE_NUM);
 573
 574         txq->need_update = 1;
 575
 576         /* Set up entry in queue's byte count circular buffer */
 577         ret = iwl4965_tx_queue_update_wr_ptr(priv, txq, 0);
 578
 579         /* Increment and update queue's write index */
 580         q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
 581         iwl4965_tx_queue_update_write_ptr(priv, txq);
 582
 583         spin_unlock_irqrestore(&priv->hcmd_lock, flags);
 584         return ret ? ret : idx;
 585 }
 586
 587 static void iwl4965_set_rxon_hwcrypto(struct iwl_priv *priv, int hw_decrypt)
 588 {
 589         struct iwl4965_rxon_cmd *rxon = &priv->staging_rxon;
 590
 591         if (hw_decrypt)
 592                 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
 593         else
 594                 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
 595
 596 }
 597
 598 int iwl4965_send_statistics_request(struct iwl_priv *priv)
 599 {
 600         u32 flags = 0;
 601         return iwl_send_cmd_pdu(priv, REPLY_STATISTICS_CMD,
 602                                       sizeof(flags), &flags);
 603 }
 604
 605 /**
 606  * iwl4965_rxon_add_station - add station into station table.
 607  *
 608  * there is only one AP station with id= IWL_AP_ID
 609  * NOTE: mutex must be held before calling this fnction
 610  */
 611 static int iwl4965_rxon_add_station(struct iwl_priv *priv,
 612                                 const u8 *addr, int is_ap)
 613 {
 614         u8 sta_id;
 615
 616         /* Add station to device's station table */
 617 #ifdef CONFIG_IWL4965_HT
 618         struct ieee80211_conf *conf = &priv->hw->conf;
 619         struct ieee80211_ht_info *cur_ht_config = &conf->ht_conf;
 620
 621         if ((is_ap) &&
 622             (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) &&
 623             (priv->iw_mode == IEEE80211_IF_TYPE_STA))
 624                 sta_id = iwl4965_add_station_flags(priv, addr, is_ap,
 625                                                    0, cur_ht_config);
 626         else
 627 #endif /* CONFIG_IWL4965_HT */
 628                 sta_id = iwl4965_add_station_flags(priv, addr, is_ap,
 629                                                    0, NULL);
 630
 631         /* Set up default rate scaling table in device's station table */
 632         iwl4965_add_station(priv, addr, is_ap);
 633
 634         return sta_id;
 635 }
 636
 637 /**
 638  * iwl4965_check_rxon_cmd - validate RXON structure is valid
 639  *
 640  * NOTE:  This is really only useful during development and can eventually
 641  * be #ifdef'd out once the driver is stable and folks aren't actively
 642  * making changes
 643  */
 644 static int iwl4965_check_rxon_cmd(struct iwl4965_rxon_cmd *rxon)
 645 {
 646         int error = 0;
 647         int counter = 1;
 648
 649         if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
 650                 error |= le32_to_cpu(rxon->flags &
 651                                 (RXON_FLG_TGJ_NARROW_BAND_MSK |
 652                                  RXON_FLG_RADAR_DETECT_MSK));
 653                 if (error)
 654                         IWL_WARNING("check 24G fields %d | %d\n",
 655                                     counter++, error);
 656         } else {
 657                 error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ?
 658                                 0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK);
 659                 if (error)
 660                         IWL_WARNING("check 52 fields %d | %d\n",
 661                                     counter++, error);
 662                 error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK);
 663                 if (error)
 664                         IWL_WARNING("check 52 CCK %d | %d\n",
 665                                     counter++, error);
 666         }
 667         error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1;
 668         if (error)
 669                 IWL_WARNING("check mac addr %d | %d\n", counter++, error);
 670
 671         /* make sure basic rates 6Mbps and 1Mbps are supported */
 672         error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) &&
 673                   ((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0));
 674         if (error)
 675                 IWL_WARNING("check basic rate %d | %d\n", counter++, error);
 676
 677         error |= (le16_to_cpu(rxon->assoc_id) > 2007);
 678         if (error)
 679                 IWL_WARNING("check assoc id %d | %d\n", counter++, error);
 680
 681         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
 682                         == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK));
 683         if (error)
 684                 IWL_WARNING("check CCK and short slot %d | %d\n",
 685                             counter++, error);
 686
 687         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
 688                         == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK));
 689         if (error)
 690                 IWL_WARNING("check CCK & auto detect %d | %d\n",
 691                             counter++, error);
 692
 693         error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
 694                         RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK);
 695         if (error)
 696                 IWL_WARNING("check TGG and auto detect %d | %d\n",
 697                             counter++, error);
 698
 699         if (error)
 700                 IWL_WARNING("Tuning to channel %d\n",
 701                             le16_to_cpu(rxon->channel));
 702
 703         if (error) {
 704                 IWL_ERROR("Not a valid iwl4965_rxon_assoc_cmd field values\n");
 705                 return -1;
 706         }
 707         return 0;
 708 }
 709
 710 /**
 711  * iwl4965_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
 712  * @priv: staging_rxon is compared to active_rxon
 713  *
 714  * If the RXON structure is changing enough to require a new tune,
 715  * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
 716  * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
 717  */
 718 static int iwl4965_full_rxon_required(struct iwl_priv *priv)
 719 {
 720
 721         /* These items are only settable from the full RXON command */
 722         if (!(priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) ||
 723             compare_ether_addr(priv->staging_rxon.bssid_addr,
 724                                priv->active_rxon.bssid_addr) ||
 725             compare_ether_addr(priv->staging_rxon.node_addr,
 726                                priv->active_rxon.node_addr) ||
 727             compare_ether_addr(priv->staging_rxon.wlap_bssid_addr,
 728                                priv->active_rxon.wlap_bssid_addr) ||
 729             (priv->staging_rxon.dev_type != priv->active_rxon.dev_type) ||
 730             (priv->staging_rxon.channel != priv->active_rxon.channel) ||
 731             (priv->staging_rxon.air_propagation !=
 732              priv->active_rxon.air_propagation) ||
 733             (priv->staging_rxon.ofdm_ht_single_stream_basic_rates !=
 734              priv->active_rxon.ofdm_ht_single_stream_basic_rates) ||
 735             (priv->staging_rxon.ofdm_ht_dual_stream_basic_rates !=
 736              priv->active_rxon.ofdm_ht_dual_stream_basic_rates) ||
 737             (priv->staging_rxon.rx_chain != priv->active_rxon.rx_chain) ||
 738             (priv->staging_rxon.assoc_id != priv->active_rxon.assoc_id))
 739                 return 1;
 740
 741         /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
 742          * be updated with the RXON_ASSOC command -- however only some
 743          * flag transitions are allowed using RXON_ASSOC */
 744
 745         /* Check if we are not switching bands */
 746         if ((priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) !=
 747             (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK))
 748                 return 1;
 749
 750         /* Check if we are switching association toggle */
 751         if ((priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) !=
 752                 (priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK))
 753                 return 1;
 754
 755         return 0;
 756 }
 757
 758 static int iwl4965_send_rxon_assoc(struct iwl_priv *priv)
 759 {
 760         int rc = 0;
 761         struct iwl4965_rx_packet *res = NULL;
 762         struct iwl4965_rxon_assoc_cmd rxon_assoc;
 763         struct iwl_host_cmd cmd = {
 764                 .id = REPLY_RXON_ASSOC,
 765                 .len = sizeof(rxon_assoc),
 766                 .meta.flags = CMD_WANT_SKB,
 767                 .data = &rxon_assoc,
 768         };
 769         const struct iwl4965_rxon_cmd *rxon1 = &priv->staging_rxon;
 770         const struct iwl4965_rxon_cmd *rxon2 = &priv->active_rxon;
 771
 772         if ((rxon1->flags == rxon2->flags) &&
 773             (rxon1->filter_flags == rxon2->filter_flags) &&
 774             (rxon1->cck_basic_rates == rxon2->cck_basic_rates) &&
 775             (rxon1->ofdm_ht_single_stream_basic_rates ==
 776              rxon2->ofdm_ht_single_stream_basic_rates) &&
 777             (rxon1->ofdm_ht_dual_stream_basic_rates ==
 778              rxon2->ofdm_ht_dual_stream_basic_rates) &&
 779             (rxon1->rx_chain == rxon2->rx_chain) &&
 780             (rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates)) {
 781                 IWL_DEBUG_INFO("Using current RXON_ASSOC.  Not resending.\n");
 782                 return 0;
 783         }
 784
 785         rxon_assoc.flags = priv->staging_rxon.flags;
 786         rxon_assoc.filter_flags = priv->staging_rxon.filter_flags;
 787         rxon_assoc.ofdm_basic_rates = priv->staging_rxon.ofdm_basic_rates;
 788         rxon_assoc.cck_basic_rates = priv->staging_rxon.cck_basic_rates;
 789         rxon_assoc.reserved = 0;
 790         rxon_assoc.ofdm_ht_single_stream_basic_rates =
 791             priv->staging_rxon.ofdm_ht_single_stream_basic_rates;
 792         rxon_assoc.ofdm_ht_dual_stream_basic_rates =
 793             priv->staging_rxon.ofdm_ht_dual_stream_basic_rates;
 794         rxon_assoc.rx_chain_select_flags = priv->staging_rxon.rx_chain;
 795
 796         rc = iwl_send_cmd_sync(priv, &cmd);
 797         if (rc)
 798                 return rc;
 799
 800         res = (struct iwl4965_rx_packet *)cmd.meta.u.skb->data;
 801         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
 802                 IWL_ERROR("Bad return from REPLY_RXON_ASSOC command\n");
 803                 rc = -EIO;
 804         }
 805
 806         priv->alloc_rxb_skb--;
 807         dev_kfree_skb_any(cmd.meta.u.skb);
 808
 809         return rc;
 810 }
 811
 812 /**
 813  * iwl4965_commit_rxon - commit staging_rxon to hardware
 814  *
 815  * The RXON command in staging_rxon is committed to the hardware and
 816  * the active_rxon structure is updated with the new data.  This
 817  * function correctly transitions out of the RXON_ASSOC_MSK state if
 818  * a HW tune is required based on the RXON structure changes.
 819  */
 820 static int iwl4965_commit_rxon(struct iwl_priv *priv)
 821 {
 822         /* cast away the const for active_rxon in this function */
 823         struct iwl4965_rxon_cmd *active_rxon = (void *)&priv->active_rxon;
 824         DECLARE_MAC_BUF(mac);
 825         int rc = 0;
 826
 827         if (!iwl_is_alive(priv))
 828                 return -1;
 829
 830         /* always get timestamp with Rx frame */
 831         priv->staging_rxon.flags |= RXON_FLG_TSF2HOST_MSK;
 832
 833         rc = iwl4965_check_rxon_cmd(&priv->staging_rxon);
 834         if (rc) {
 835                 IWL_ERROR("Invalid RXON configuration.  Not committing.\n");
 836                 return -EINVAL;
 837         }
 838
 839         /* If we don't need to send a full RXON, we can use
 840          * iwl4965_rxon_assoc_cmd which is used to reconfigure filter
 841          * and other flags for the current radio configuration. */
 842         if (!iwl4965_full_rxon_required(priv)) {
 843                 rc = iwl4965_send_rxon_assoc(priv);
 844                 if (rc) {
 845                         IWL_ERROR("Error setting RXON_ASSOC "
 846                                   "configuration (%d).\n", rc);
 847                         return rc;
 848                 }
 849
 850                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
 851
 852                 return 0;
 853         }
 854
 855         /* station table will be cleared */
 856         priv->assoc_station_added = 0;
 857
 858 #ifdef CONFIG_IWL4965_SENSITIVITY
 859         priv->sensitivity_data.state = IWL_SENS_CALIB_NEED_REINIT;
 860         if (!priv->error_recovering)
 861                 priv->start_calib = 0;
 862
 863         iwl4965_init_sensitivity(priv, CMD_ASYNC, 1);
 864 #endif /* CONFIG_IWL4965_SENSITIVITY */
 865
 866         /* If we are currently associated and the new config requires
 867          * an RXON_ASSOC and the new config wants the associated mask enabled,
 868          * we must clear the associated from the active configuration
 869          * before we apply the new config */
 870         if (iwl_is_associated(priv) &&
 871             (priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK)) {
 872                 IWL_DEBUG_INFO("Toggling associated bit on current RXON\n");
 873                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
 874
 875                 rc = iwl_send_cmd_pdu(priv, REPLY_RXON,
 876                                       sizeof(struct iwl4965_rxon_cmd),
 877                                       &priv->active_rxon);
 878
 879                 /* If the mask clearing failed then we set
 880                  * active_rxon back to what it was previously */
 881                 if (rc) {
 882                         active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
 883                         IWL_ERROR("Error clearing ASSOC_MSK on current "
 884                                   "configuration (%d).\n", rc);
 885                         return rc;
 886                 }
 887         }
 888
 889         IWL_DEBUG_INFO("Sending RXON\n"
 890                        "* with%s RXON_FILTER_ASSOC_MSK\n"
 891                        "* channel = %d\n"
 892                        "* bssid = %s\n",
 893                        ((priv->staging_rxon.filter_flags &
 894                          RXON_FILTER_ASSOC_MSK) ? "" : "out"),
 895                        le16_to_cpu(priv->staging_rxon.channel),
 896                        print_mac(mac, priv->staging_rxon.bssid_addr));
 897
 898         iwl4965_set_rxon_hwcrypto(priv, priv->cfg->mod_params->hw_crypto);
 899         /* Apply the new configuration */
 900         rc = iwl_send_cmd_pdu(priv, REPLY_RXON,
 901                               sizeof(struct iwl4965_rxon_cmd), &priv->staging_rxon);
 902         if (rc) {
 903                 IWL_ERROR("Error setting new configuration (%d).\n", rc);
 904                 return rc;
 905         }
 906
 907         iwlcore_clear_stations_table(priv);
 908
 909 #ifdef CONFIG_IWL4965_SENSITIVITY
 910         if (!priv->error_recovering)
 911                 priv->start_calib = 0;
 912
 913         priv->sensitivity_data.state = IWL_SENS_CALIB_NEED_REINIT;
 914         iwl4965_init_sensitivity(priv, CMD_ASYNC, 1);
 915 #endif /* CONFIG_IWL4965_SENSITIVITY */
 916
 917         memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
 918
 919         /* If we issue a new RXON command which required a tune then we must
 920          * send a new TXPOWER command or we won't be able to Tx any frames */
 921         rc = iwl4965_hw_reg_send_txpower(priv);
 922         if (rc) {
 923                 IWL_ERROR("Error setting Tx power (%d).\n", rc);
 924                 return rc;
 925         }
 926
 927         /* Add the broadcast address so we can send broadcast frames */
 928         if (iwl4965_rxon_add_station(priv, iwl4965_broadcast_addr, 0) ==
 929             IWL_INVALID_STATION) {
 930                 IWL_ERROR("Error adding BROADCAST address for transmit.\n");
 931                 return -EIO;
 932         }
 933
 934         /* If we have set the ASSOC_MSK and we are in BSS mode then
 935          * add the IWL_AP_ID to the station rate table */
 936         if (iwl_is_associated(priv) &&
 937             (priv->iw_mode == IEEE80211_IF_TYPE_STA)) {
 938                 if (iwl4965_rxon_add_station(priv, priv->active_rxon.bssid_addr, 1)
 939                     == IWL_INVALID_STATION) {
 940                         IWL_ERROR("Error adding AP address for transmit.\n");
 941                         return -EIO;
 942                 }
 943                 priv->assoc_station_added = 1;
 944         }
 945
 946         return 0;
 947 }
 948
 949 static int iwl4965_send_bt_config(struct iwl_priv *priv)
 950 {
 951         struct iwl4965_bt_cmd bt_cmd = {
 952                 .flags = 3,
 953                 .lead_time = 0xAA,
 954                 .max_kill = 1,
 955                 .kill_ack_mask = 0,
 956                 .kill_cts_mask = 0,
 957         };
 958
 959         return iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG,
 960                                 sizeof(struct iwl4965_bt_cmd), &bt_cmd);
 961 }
 962
 963 static int iwl4965_send_scan_abort(struct iwl_priv *priv)
 964 {
 965         int rc = 0;
 966         struct iwl4965_rx_packet *res;
 967         struct iwl_host_cmd cmd = {
 968                 .id = REPLY_SCAN_ABORT_CMD,
 969                 .meta.flags = CMD_WANT_SKB,
 970         };
 971
 972         /* If there isn't a scan actively going on in the hardware
 973          * then we are in between scan bands and not actually
 974          * actively scanning, so don't send the abort command */
 975         if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
 976                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
 977                 return 0;
 978         }
 979
 980         rc = iwl_send_cmd_sync(priv, &cmd);
 981         if (rc) {
 982                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
 983                 return rc;
 984         }
 985
 986         res = (struct iwl4965_rx_packet *)cmd.meta.u.skb->data;
 987         if (res->u.status != CAN_ABORT_STATUS) {
 988                 /* The scan abort will return 1 for success or
 989                  * 2 for "failure".  A failure condition can be
 990                  * due to simply not being in an active scan which
 991                  * can occur if we send the scan abort before we
 992                  * the microcode has notified us that a scan is
 993                  * completed. */
 994                 IWL_DEBUG_INFO("SCAN_ABORT returned %d.\n", res->u.status);
 995                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
 996                 clear_bit(STATUS_SCAN_HW, &priv->status);
 997         }
 998
 999         dev_kfree_skb_any(cmd.meta.u.skb);
1000
1001         return rc;
1002 }
1003
1004 static int iwl4965_card_state_sync_callback(struct iwl_priv *priv,
1005                                         struct iwl_cmd *cmd,
1006                                         struct sk_buff *skb)
1007 {
1008         return 1;
1009 }
1010
1011 /*
1012  * CARD_STATE_CMD
1013  *
1014  * Use: Sets the device's internal card state to enable, disable, or halt
1015  *
1016  * When in the 'enable' state the card operates as normal.
1017  * When in the 'disable' state, the card enters into a low power mode.
1018  * When in the 'halt' state, the card is shut down and must be fully
1019  * restarted to come back on.
1020  */
1021 static int iwl4965_send_card_state(struct iwl_priv *priv, u32 flags, u8 meta_flag)
1022 {
1023         struct iwl_host_cmd cmd = {
1024                 .id = REPLY_CARD_STATE_CMD,
1025                 .len = sizeof(u32),
1026                 .data = &flags,
1027                 .meta.flags = meta_flag,
1028         };
1029
1030         if (meta_flag & CMD_ASYNC)
1031                 cmd.meta.u.callback = iwl4965_card_state_sync_callback;
1032
1033         return iwl_send_cmd(priv, &cmd);
1034 }
1035
1036 static int iwl4965_add_sta_sync_callback(struct iwl_priv *priv,
1037                                      struct iwl_cmd *cmd, struct sk_buff *skb)
1038 {
1039         struct iwl4965_rx_packet *res = NULL;
1040
1041         if (!skb) {
1042                 IWL_ERROR("Error: Response NULL in REPLY_ADD_STA.\n");
1043                 return 1;
1044         }
1045
1046         res = (struct iwl4965_rx_packet *)skb->data;
1047         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1048                 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
1049                           res->hdr.flags);
1050                 return 1;
1051         }
1052
1053         switch (res->u.add_sta.status) {
1054         case ADD_STA_SUCCESS_MSK:
1055                 break;
1056         default:
1057                 break;
1058         }
1059
1060         /* We didn't cache the SKB; let the caller free it */
1061         return 1;
1062 }
1063
1064 int iwl4965_send_add_station(struct iwl_priv *priv,
1065                          struct iwl4965_addsta_cmd *sta, u8 flags)
1066 {
1067         struct iwl4965_rx_packet *res = NULL;
1068         int rc = 0;
1069         struct iwl_host_cmd cmd = {
1070                 .id = REPLY_ADD_STA,
1071                 .len = sizeof(struct iwl4965_addsta_cmd),
1072                 .meta.flags = flags,
1073                 .data = sta,
1074         };
1075
1076         if (flags & CMD_ASYNC)
1077                 cmd.meta.u.callback = iwl4965_add_sta_sync_callback;
1078         else
1079                 cmd.meta.flags |= CMD_WANT_SKB;
1080
1081         rc = iwl_send_cmd(priv, &cmd);
1082
1083         if (rc || (flags & CMD_ASYNC))
1084                 return rc;
1085
1086         res = (struct iwl4965_rx_packet *)cmd.meta.u.skb->data;
1087         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
1088                 IWL_ERROR("Bad return from REPLY_ADD_STA (0x%08X)\n",
1089                           res->hdr.flags);
1090                 rc = -EIO;
1091         }
1092
1093         if (rc == 0) {
1094                 switch (res->u.add_sta.status) {
1095                 case ADD_STA_SUCCESS_MSK:
1096                         IWL_DEBUG_INFO("REPLY_ADD_STA PASSED\n");
1097                         break;
1098                 default:
1099                         rc = -EIO;
1100                         IWL_WARNING("REPLY_ADD_STA failed\n");
1101                         break;
1102                 }
1103         }
1104
1105         priv->alloc_rxb_skb--;
1106         dev_kfree_skb_any(cmd.meta.u.skb);
1107
1108         return rc;
1109 }
1110
1111 static int iwl4965_set_ccmp_dynamic_key_info(struct iwl_priv *priv,
1112                                    struct ieee80211_key_conf *keyconf,
1113                                    u8 sta_id)
1114 {
1115         unsigned long flags;
1116         __le16 key_flags = 0;
1117
1118         key_flags |= (STA_KEY_FLG_CCMP | STA_KEY_FLG_MAP_KEY_MSK);
1119         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
1120
1121         if (sta_id == priv->hw_setting.bcast_sta_id)
1122                 key_flags |= STA_KEY_MULTICAST_MSK;
1123
1124         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
1125         keyconf->hw_key_idx = keyconf->keyidx;
1126
1127         key_flags &= ~STA_KEY_FLG_INVALID;
1128
1129         spin_lock_irqsave(&priv->sta_lock, flags);
1130         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
1131         priv->stations[sta_id].keyinfo.keylen = keyconf->keylen;
1132
1133         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key,
1134                keyconf->keylen);
1135
1136         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key,
1137                keyconf->keylen);
1138
1139         priv->stations[sta_id].sta.key.key_offset
1140                         = (sta_id % STA_KEY_MAX_NUM);/*FIXME*/
1141         priv->stations[sta_id].sta.key.key_flags = key_flags;
1142         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1143         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1144
1145         spin_unlock_irqrestore(&priv->sta_lock, flags);
1146
1147         IWL_DEBUG_INFO("hwcrypto: modify ucode station key info\n");
1148         return iwl4965_send_add_station(priv,
1149                                 &priv->stations[sta_id].sta, CMD_ASYNC);
1150 }
1151
1152 static int iwl4965_set_tkip_dynamic_key_info(struct iwl_priv *priv,
1153                                    struct ieee80211_key_conf *keyconf,
1154                                    u8 sta_id)
1155 {
1156         unsigned long flags;
1157         int ret = 0;
1158
1159         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
1160         keyconf->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
1161         keyconf->hw_key_idx = keyconf->keyidx;
1162
1163         spin_lock_irqsave(&priv->sta_lock, flags);
1164
1165         priv->stations[sta_id].keyinfo.alg = keyconf->alg;
1166         priv->stations[sta_id].keyinfo.conf = keyconf;
1167         priv->stations[sta_id].keyinfo.keylen = 16;
1168
1169         /* This copy is acutally not needed: we get the key with each TX */
1170         memcpy(priv->stations[sta_id].keyinfo.key, keyconf->key, 16);
1171
1172         memcpy(priv->stations[sta_id].sta.key.key, keyconf->key, 16);
1173
1174         spin_unlock_irqrestore(&priv->sta_lock, flags);
1175
1176         return ret;
1177 }
1178
1179 static int iwl4965_clear_sta_key_info(struct iwl_priv *priv, u8 sta_id)
1180 {
1181         unsigned long flags;
1182
1183         spin_lock_irqsave(&priv->sta_lock, flags);
1184         memset(&priv->stations[sta_id].keyinfo, 0, sizeof(struct iwl4965_hw_key));
1185         memset(&priv->stations[sta_id].sta.key, 0, sizeof(struct iwl4965_keyinfo));
1186         priv->stations[sta_id].sta.key.key_flags = STA_KEY_FLG_NO_ENC;
1187         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
1188         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1189         spin_unlock_irqrestore(&priv->sta_lock, flags);
1190
1191         IWL_DEBUG_INFO("hwcrypto: clear ucode station key info\n");
1192         iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, 0);
1193         return 0;
1194 }
1195
1196 static int iwl4965_set_dynamic_key(struct iwl_priv *priv,
1197                                 struct ieee80211_key_conf *key, u8 sta_id)
1198 {
1199         int ret;
1200
1201         switch (key->alg) {
1202         case ALG_CCMP:
1203                 ret = iwl4965_set_ccmp_dynamic_key_info(priv, key, sta_id);
1204                 break;
1205         case ALG_TKIP:
1206                 ret = iwl4965_set_tkip_dynamic_key_info(priv, key, sta_id);
1207                 break;
1208         case ALG_WEP:
1209                 ret = -EOPNOTSUPP;
1210                 break;
1211         default:
1212                 IWL_ERROR("Unknown alg: %s alg = %d\n", __func__, key->alg);
1213                 ret = -EINVAL;
1214         }
1215
1216         return ret;
1217 }
1218
1219 static int iwl4965_remove_static_key(struct iwl_priv *priv)
1220 {
1221         int ret = -EOPNOTSUPP;
1222
1223         return ret;
1224 }
1225
1226 static int iwl4965_set_static_key(struct iwl_priv *priv,
1227                                 struct ieee80211_key_conf *key)
1228 {
1229         if (key->alg == ALG_WEP)
1230                 return -EOPNOTSUPP;
1231
1232         IWL_ERROR("Static key invalid: alg %d\n", key->alg);
1233         return -EINVAL;
1234 }
1235
1236 static void iwl4965_clear_free_frames(struct iwl_priv *priv)
1237 {
1238         struct list_head *element;
1239
1240         IWL_DEBUG_INFO("%d frames on pre-allocated heap on clear.\n",
1241                        priv->frames_count);
1242
1243         while (!list_empty(&priv->free_frames)) {
1244                 element = priv->free_frames.next;
1245                 list_del(element);
1246                 kfree(list_entry(element, struct iwl4965_frame, list));
1247                 priv->frames_count--;
1248         }
1249
1250         if (priv->frames_count) {
1251                 IWL_WARNING("%d frames still in use.  Did we lose one?\n",
1252                             priv->frames_count);
1253                 priv->frames_count = 0;
1254         }
1255 }
1256
1257 static struct iwl4965_frame *iwl4965_get_free_frame(struct iwl_priv *priv)
1258 {
1259         struct iwl4965_frame *frame;
1260         struct list_head *element;
1261         if (list_empty(&priv->free_frames)) {
1262                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
1263                 if (!frame) {
1264                         IWL_ERROR("Could not allocate frame!\n");
1265                         return NULL;
1266                 }
1267
1268                 priv->frames_count++;
1269                 return frame;
1270         }
1271
1272         element = priv->free_frames.next;
1273         list_del(element);
1274         return list_entry(element, struct iwl4965_frame, list);
1275 }
1276
1277 static void iwl4965_free_frame(struct iwl_priv *priv, struct iwl4965_frame *frame)
1278 {
1279         memset(frame, 0, sizeof(*frame));
1280         list_add(&frame->list, &priv->free_frames);
1281 }
1282
1283 unsigned int iwl4965_fill_beacon_frame(struct iwl_priv *priv,
1284                                 struct ieee80211_hdr *hdr,
1285                                 const u8 *dest, int left)
1286 {
1287
1288         if (!iwl_is_associated(priv) || !priv->ibss_beacon ||
1289             ((priv->iw_mode != IEEE80211_IF_TYPE_IBSS) &&
1290              (priv->iw_mode != IEEE80211_IF_TYPE_AP)))
1291                 return 0;
1292
1293         if (priv->ibss_beacon->len > left)
1294                 return 0;
1295
1296         memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
1297
1298         return priv->ibss_beacon->len;
1299 }
1300
1301 static u8 iwl4965_rate_get_lowest_plcp(int rate_mask)
1302 {
1303         u8 i;
1304
1305         for (i = IWL_RATE_1M_INDEX; i != IWL_RATE_INVALID;
1306              i = iwl4965_rates[i].next_ieee) {
1307                 if (rate_mask & (1 << i))
1308                         return iwl4965_rates[i].plcp;
1309         }
1310
1311         return IWL_RATE_INVALID;
1312 }
1313
1314 static int iwl4965_send_beacon_cmd(struct iwl_priv *priv)
1315 {
1316         struct iwl4965_frame *frame;
1317         unsigned int frame_size;
1318         int rc;
1319         u8 rate;
1320
1321         frame = iwl4965_get_free_frame(priv);
1322
1323         if (!frame) {
1324                 IWL_ERROR("Could not obtain free frame buffer for beacon "
1325                           "command.\n");
1326                 return -ENOMEM;
1327         }
1328
1329         if (!(priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)) {
1330                 rate = iwl4965_rate_get_lowest_plcp(priv->active_rate_basic &
1331                                                 0xFF0);
1332                 if (rate == IWL_INVALID_RATE)
1333                         rate = IWL_RATE_6M_PLCP;
1334         } else {
1335                 rate = iwl4965_rate_get_lowest_plcp(priv->active_rate_basic & 0xF);
1336                 if (rate == IWL_INVALID_RATE)
1337                         rate = IWL_RATE_1M_PLCP;
1338         }
1339
1340         frame_size = iwl4965_hw_get_beacon_cmd(priv, frame, rate);
1341
1342         rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
1343                               &frame->u.cmd[0]);
1344
1345         iwl4965_free_frame(priv, frame);
1346
1347         return rc;
1348 }
1349
1350 /******************************************************************************
1351  *
1352  * Misc. internal state and helper functions
1353  *
1354  ******************************************************************************/
1355
1356 static void iwl4965_unset_hw_setting(struct iwl_priv *priv)
1357 {
1358         if (priv->hw_setting.shared_virt)
1359                 pci_free_consistent(priv->pci_dev,
1360                                     sizeof(struct iwl4965_shared),
1361                                     priv->hw_setting.shared_virt,
1362                                     priv->hw_setting.shared_phys);
1363 }
1364
1365 /**
1366  * iwl4965_supported_rate_to_ie - fill in the supported rate in IE field
1367  *
1368  * return : set the bit for each supported rate insert in ie
1369  */
1370 static u16 iwl4965_supported_rate_to_ie(u8 *ie, u16 supported_rate,
1371                                     u16 basic_rate, int *left)
1372 {
1373         u16 ret_rates = 0, bit;
1374         int i;
1375         u8 *cnt = ie;
1376         u8 *rates = ie + 1;
1377
1378         for (bit = 1, i = 0; i < IWL_RATE_COUNT; i++, bit <<= 1) {
1379                 if (bit & supported_rate) {
1380                         ret_rates |= bit;
1381                         rates[*cnt] = iwl4965_rates[i].ieee |
1382                                 ((bit & basic_rate) ? 0x80 : 0x00);
1383                         (*cnt)++;
1384                         (*left)--;
1385                         if ((*left <= 0) ||
1386                             (*cnt >= IWL_SUPPORTED_RATES_IE_LEN))
1387                                 break;
1388                 }
1389         }
1390
1391         return ret_rates;
1392 }
1393
1394 /**
1395  * iwl4965_fill_probe_req - fill in all required fields and IE for probe request
1396  */
1397 static u16 iwl4965_fill_probe_req(struct iwl_priv *priv,
1398                                   enum ieee80211_band band,
1399                                   struct ieee80211_mgmt *frame,
1400                                   int left, int is_direct)
1401 {
1402         int len = 0;
1403         u8 *pos = NULL;
1404         u16 active_rates, ret_rates, cck_rates, active_rate_basic;
1405 #ifdef CONFIG_IWL4965_HT
1406         const struct ieee80211_supported_band *sband =
1407                                                 iwl4965_get_hw_mode(priv, band);
1408 #endif /* CONFIG_IWL4965_HT */
1409
1410         /* Make sure there is enough space for the probe request,
1411          * two mandatory IEs and the data */
1412         left -= 24;
1413         if (left < 0)
1414                 return 0;
1415         len += 24;
1416
1417         frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
1418         memcpy(frame->da, iwl4965_broadcast_addr, ETH_ALEN);
1419         memcpy(frame->sa, priv->mac_addr, ETH_ALEN);
1420         memcpy(frame->bssid, iwl4965_broadcast_addr, ETH_ALEN);
1421         frame->seq_ctrl = 0;
1422
1423         /* fill in our indirect SSID IE */
1424         /* ...next IE... */
1425
1426         left -= 2;
1427         if (left < 0)
1428                 return 0;
1429         len += 2;
1430         pos = &(frame->u.probe_req.variable[0]);
1431         *pos++ = WLAN_EID_SSID;
1432         *pos++ = 0;
1433
1434         /* fill in our direct SSID IE... */
1435         if (is_direct) {
1436                 /* ...next IE... */
1437                 left -= 2 + priv->essid_len;
1438                 if (left < 0)
1439                         return 0;
1440                 /* ... fill it in... */
1441                 *pos++ = WLAN_EID_SSID;
1442                 *pos++ = priv->essid_len;
1443                 memcpy(pos, priv->essid, priv->essid_len);
1444                 pos += priv->essid_len;
1445                 len += 2 + priv->essid_len;
1446         }
1447
1448         /* fill in supported rate */
1449         /* ...next IE... */
1450         left -= 2;
1451         if (left < 0)
1452                 return 0;
1453
1454         /* ... fill it in... */
1455         *pos++ = WLAN_EID_SUPP_RATES;
1456         *pos = 0;
1457
1458         /* exclude 60M rate */
1459         active_rates = priv->rates_mask;
1460         active_rates &= ~IWL_RATE_60M_MASK;
1461
1462         active_rate_basic = active_rates & IWL_BASIC_RATES_MASK;
1463
1464         cck_rates = IWL_CCK_RATES_MASK & active_rates;
1465         ret_rates = iwl4965_supported_rate_to_ie(pos, cck_rates,
1466                         active_rate_basic, &left);
1467         active_rates &= ~ret_rates;
1468
1469         ret_rates = iwl4965_supported_rate_to_ie(pos, active_rates,
1470                                  active_rate_basic, &left);
1471         active_rates &= ~ret_rates;
1472
1473         len += 2 + *pos;
1474         pos += (*pos) + 1;
1475         if (active_rates == 0)
1476                 goto fill_end;
1477
1478         /* fill in supported extended rate */
1479         /* ...next IE... */
1480         left -= 2;
1481         if (left < 0)
1482                 return 0;
1483         /* ... fill it in... */
1484         *pos++ = WLAN_EID_EXT_SUPP_RATES;
1485         *pos = 0;
1486         iwl4965_supported_rate_to_ie(pos, active_rates,
1487                                  active_rate_basic, &left);
1488         if (*pos > 0)
1489                 len += 2 + *pos;
1490
1491 #ifdef CONFIG_IWL4965_HT
1492         if (sband && sband->ht_info.ht_supported) {
1493                 struct ieee80211_ht_cap *ht_cap;
1494                 pos += (*pos) + 1;
1495                 *pos++ = WLAN_EID_HT_CAPABILITY;
1496                 *pos++ = sizeof(struct ieee80211_ht_cap);
1497                 ht_cap = (struct ieee80211_ht_cap *)pos;
1498                 ht_cap->cap_info = cpu_to_le16(sband->ht_info.cap);
1499                 memcpy(ht_cap->supp_mcs_set, sband->ht_info.supp_mcs_set, 16);
1500                 ht_cap->ampdu_params_info =(sband->ht_info.ampdu_factor &
1501                                             IEEE80211_HT_CAP_AMPDU_FACTOR) |
1502                                             ((sband->ht_info.ampdu_density << 2) &
1503                                             IEEE80211_HT_CAP_AMPDU_DENSITY);
1504                 len += 2 + sizeof(struct ieee80211_ht_cap);
1505         }
1506 #endif  /*CONFIG_IWL4965_HT */
1507
1508  fill_end:
1509         return (u16)len;
1510 }
1511
1512 /*
1513  * QoS  support
1514 */
1515 static int iwl4965_send_qos_params_command(struct iwl_priv *priv,
1516                                        struct iwl4965_qosparam_cmd *qos)
1517 {
1518
1519         return iwl_send_cmd_pdu(priv, REPLY_QOS_PARAM,
1520                                 sizeof(struct iwl4965_qosparam_cmd), qos);
1521 }
1522
1523 static void iwl4965_activate_qos(struct iwl_priv *priv, u8 force)
1524 {
1525         unsigned long flags;
1526
1527         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1528                 return;
1529
1530         if (!priv->qos_data.qos_enable)
1531                 return;
1532
1533         spin_lock_irqsave(&priv->lock, flags);
1534         priv->qos_data.def_qos_parm.qos_flags = 0;
1535
1536         if (priv->qos_data.qos_cap.q_AP.queue_request &&
1537             !priv->qos_data.qos_cap.q_AP.txop_request)
1538                 priv->qos_data.def_qos_parm.qos_flags |=
1539                         QOS_PARAM_FLG_TXOP_TYPE_MSK;
1540         if (priv->qos_data.qos_active)
1541                 priv->qos_data.def_qos_parm.qos_flags |=
1542                         QOS_PARAM_FLG_UPDATE_EDCA_MSK;
1543
1544 #ifdef CONFIG_IWL4965_HT
1545         if (priv->current_ht_config.is_ht)
1546                 priv->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
1547 #endif /* CONFIG_IWL4965_HT */
1548
1549         spin_unlock_irqrestore(&priv->lock, flags);
1550
1551         if (force || iwl_is_associated(priv)) {
1552                 IWL_DEBUG_QOS("send QoS cmd with Qos active=%d FLAGS=0x%X\n",
1553                                 priv->qos_data.qos_active,
1554                                 priv->qos_data.def_qos_parm.qos_flags);
1555
1556                 iwl4965_send_qos_params_command(priv,
1557                                 &(priv->qos_data.def_qos_parm));
1558         }
1559 }
1560
1561 /*
1562  * Power management (not Tx power!) functions
1563  */
1564 #define MSEC_TO_USEC 1024
1565
1566 #define NOSLP __constant_cpu_to_le16(0), 0, 0
1567 #define SLP IWL_POWER_DRIVER_ALLOW_SLEEP_MSK, 0, 0
1568 #define SLP_TIMEOUT(T) __constant_cpu_to_le32((T) * MSEC_TO_USEC)
1569 #define SLP_VEC(X0, X1, X2, X3, X4) {__constant_cpu_to_le32(X0), \
1570                                      __constant_cpu_to_le32(X1), \
1571                                      __constant_cpu_to_le32(X2), \
1572                                      __constant_cpu_to_le32(X3), \
1573                                      __constant_cpu_to_le32(X4)}
1574
1575
1576 /* default power management (not Tx power) table values */
1577 /* for tim  0-10 */
1578 static struct iwl4965_power_vec_entry range_0[IWL_POWER_AC] = {
1579         {{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
1580         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500), SLP_VEC(1, 2, 3, 4, 4)}, 0},
1581         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300), SLP_VEC(2, 4, 6, 7, 7)}, 0},
1582         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100), SLP_VEC(2, 6, 9, 9, 10)}, 0},
1583         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 10)}, 1},
1584         {{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25), SLP_VEC(4, 7, 10, 10, 10)}, 1}
1585 };
1586
1587 /* for tim > 10 */
1588 static struct iwl4965_power_vec_entry range_1[IWL_POWER_AC] = {
1589         {{NOSLP, SLP_TIMEOUT(0), SLP_TIMEOUT(0), SLP_VEC(0, 0, 0, 0, 0)}, 0},
1590         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(500),
1591                  SLP_VEC(1, 2, 3, 4, 0xFF)}, 0},
1592         {{SLP, SLP_TIMEOUT(200), SLP_TIMEOUT(300),
1593                  SLP_VEC(2, 4, 6, 7, 0xFF)}, 0},
1594         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(100),
1595                  SLP_VEC(2, 6, 9, 9, 0xFF)}, 0},
1596         {{SLP, SLP_TIMEOUT(50), SLP_TIMEOUT(25), SLP_VEC(2, 7, 9, 9, 0xFF)}, 0},
1597         {{SLP, SLP_TIMEOUT(25), SLP_TIMEOUT(25),
1598                  SLP_VEC(4, 7, 10, 10, 0xFF)}, 0}
1599 };
1600
1601 int iwl4965_power_init_handle(struct iwl_priv *priv)
1602 {
1603         int rc = 0, i;
1604         struct iwl4965_power_mgr *pow_data;
1605         int size = sizeof(struct iwl4965_power_vec_entry) * IWL_POWER_AC;
1606         u16 pci_pm;
1607
1608         IWL_DEBUG_POWER("Initialize power \n");
1609
1610         pow_data = &(priv->power_data);
1611
1612         memset(pow_data, 0, sizeof(*pow_data));
1613
1614         pow_data->active_index = IWL_POWER_RANGE_0;
1615         pow_data->dtim_val = 0xffff;
1616
1617         memcpy(&pow_data->pwr_range_0[0], &range_0[0], size);
1618         memcpy(&pow_data->pwr_range_1[0], &range_1[0], size);
1619
1620         rc = pci_read_config_word(priv->pci_dev, PCI_LINK_CTRL, &pci_pm);
1621         if (rc != 0)
1622                 return 0;
1623         else {
1624                 struct iwl4965_powertable_cmd *cmd;
1625
1626                 IWL_DEBUG_POWER("adjust power command flags\n");
1627
1628                 for (i = 0; i < IWL_POWER_AC; i++) {
1629                         cmd = &pow_data->pwr_range_0[i].cmd;
1630
1631                         if (pci_pm & 0x1)
1632                                 cmd->flags &= ~IWL_POWER_PCI_PM_MSK;
1633                         else
1634                                 cmd->flags |= IWL_POWER_PCI_PM_MSK;
1635                 }
1636         }
1637         return rc;
1638 }
1639
1640 static int iwl4965_update_power_cmd(struct iwl_priv *priv,
1641                                 struct iwl4965_powertable_cmd *cmd, u32 mode)
1642 {
1643         int rc = 0, i;
1644         u8 skip;
1645         u32 max_sleep = 0;
1646         struct iwl4965_power_vec_entry *range;
1647         u8 period = 0;
1648         struct iwl4965_power_mgr *pow_data;
1649
1650         if (mode > IWL_POWER_INDEX_5) {
1651                 IWL_DEBUG_POWER("Error invalid power mode \n");
1652                 return -1;
1653         }
1654         pow_data = &(priv->power_data);
1655
1656         if (pow_data->active_index == IWL_POWER_RANGE_0)
1657                 range = &pow_data->pwr_range_0[0];
1658         else
1659                 range = &pow_data->pwr_range_1[1];
1660
1661         memcpy(cmd, &range[mode].cmd, sizeof(struct iwl4965_powertable_cmd));
1662
1663 #ifdef IWL_MAC80211_DISABLE
1664         if (priv->assoc_network != NULL) {
1665                 unsigned long flags;
1666
1667                 period = priv->assoc_network->tim.tim_period;
1668         }
1669 #endif  /*IWL_MAC80211_DISABLE */
1670         skip = range[mode].no_dtim;
1671
1672         if (period == 0) {
1673                 period = 1;
1674                 skip = 0;
1675         }
1676
1677         if (skip == 0) {
1678                 max_sleep = period;
1679                 cmd->flags &= ~IWL_POWER_SLEEP_OVER_DTIM_MSK;
1680         } else {
1681                 __le32 slp_itrvl = cmd->sleep_interval[IWL_POWER_VEC_SIZE - 1];
1682                 max_sleep = (le32_to_cpu(slp_itrvl) / period) * period;
1683                 cmd->flags |= IWL_POWER_SLEEP_OVER_DTIM_MSK;
1684         }
1685
1686         for (i = 0; i < IWL_POWER_VEC_SIZE; i++) {
1687                 if (le32_to_cpu(cmd->sleep_interval[i]) > max_sleep)
1688                         cmd->sleep_interval[i] = cpu_to_le32(max_sleep);
1689         }
1690
1691         IWL_DEBUG_POWER("Flags value = 0x%08X\n", cmd->flags);
1692         IWL_DEBUG_POWER("Tx timeout = %u\n", le32_to_cpu(cmd->tx_data_timeout));
1693         IWL_DEBUG_POWER("Rx timeout = %u\n", le32_to_cpu(cmd->rx_data_timeout));
1694         IWL_DEBUG_POWER("Sleep interval vector = { %d , %d , %d , %d , %d }\n",
1695                         le32_to_cpu(cmd->sleep_interval[0]),
1696                         le32_to_cpu(cmd->sleep_interval[1]),
1697                         le32_to_cpu(cmd->sleep_interval[2]),
1698                         le32_to_cpu(cmd->sleep_interval[3]),
1699                         le32_to_cpu(cmd->sleep_interval[4]));
1700
1701         return rc;
1702 }
1703
1704 static int iwl4965_send_power_mode(struct iwl_priv *priv, u32 mode)
1705 {
1706         u32 uninitialized_var(final_mode);
1707         int rc;
1708         struct iwl4965_powertable_cmd cmd;
1709
1710         /* If on battery, set to 3,
1711          * if plugged into AC power, set to CAM ("continuously aware mode"),
1712          * else user level */
1713         switch (mode) {
1714         case IWL_POWER_BATTERY:
1715                 final_mode = IWL_POWER_INDEX_3;
1716                 break;
1717         case IWL_POWER_AC:
1718                 final_mode = IWL_POWER_MODE_CAM;
1719                 break;
1720         default:
1721                 final_mode = mode;
1722                 break;
1723         }
1724
1725         cmd.keep_alive_beacons = 0;
1726
1727         iwl4965_update_power_cmd(priv, &cmd, final_mode);
1728
1729         rc = iwl_send_cmd_pdu(priv, POWER_TABLE_CMD, sizeof(cmd), &cmd);
1730
1731         if (final_mode == IWL_POWER_MODE_CAM)
1732                 clear_bit(STATUS_POWER_PMI, &priv->status);
1733         else
1734                 set_bit(STATUS_POWER_PMI, &priv->status);
1735
1736         return rc;
1737 }
1738
1739 int iwl4965_is_network_packet(struct iwl_priv *priv, struct ieee80211_hdr *header)
1740 {
1741         /* Filter incoming packets to determine if they are targeted toward
1742          * this network, discarding packets coming from ourselves */
1743         switch (priv->iw_mode) {
1744         case IEEE80211_IF_TYPE_IBSS: /* Header: Dest. | Source    | BSSID */
1745                 /* packets from our adapter are dropped (echo) */
1746                 if (!compare_ether_addr(header->addr2, priv->mac_addr))
1747                         return 0;
1748                 /* {broad,multi}cast packets to our IBSS go through */
1749                 if (is_multicast_ether_addr(header->addr1))
1750                         return !compare_ether_addr(header->addr3, priv->bssid);
1751                 /* packets to our adapter go through */
1752                 return !compare_ether_addr(header->addr1, priv->mac_addr);
1753         case IEEE80211_IF_TYPE_STA: /* Header: Dest. | AP{BSSID} | Source */
1754                 /* packets from our adapter are dropped (echo) */
1755                 if (!compare_ether_addr(header->addr3, priv->mac_addr))
1756                         return 0;
1757                 /* {broad,multi}cast packets to our BSS go through */
1758                 if (is_multicast_ether_addr(header->addr1))
1759                         return !compare_ether_addr(header->addr2, priv->bssid);
1760                 /* packets to our adapter go through */
1761                 return !compare_ether_addr(header->addr1, priv->mac_addr);
1762         default:
1763                 break;
1764         }
1765
1766         return 1;
1767 }
1768
1769 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
1770
1771 static const char *iwl4965_get_tx_fail_reason(u32 status)
1772 {
1773         switch (status & TX_STATUS_MSK) {
1774         case TX_STATUS_SUCCESS:
1775                 return "SUCCESS";
1776                 TX_STATUS_ENTRY(SHORT_LIMIT);
1777                 TX_STATUS_ENTRY(LONG_LIMIT);
1778                 TX_STATUS_ENTRY(FIFO_UNDERRUN);
1779                 TX_STATUS_ENTRY(MGMNT_ABORT);
1780                 TX_STATUS_ENTRY(NEXT_FRAG);
1781                 TX_STATUS_ENTRY(LIFE_EXPIRE);
1782                 TX_STATUS_ENTRY(DEST_PS);
1783                 TX_STATUS_ENTRY(ABORTED);
1784                 TX_STATUS_ENTRY(BT_RETRY);
1785                 TX_STATUS_ENTRY(STA_INVALID);
1786                 TX_STATUS_ENTRY(FRAG_DROPPED);
1787                 TX_STATUS_ENTRY(TID_DISABLE);
1788                 TX_STATUS_ENTRY(FRAME_FLUSHED);
1789                 TX_STATUS_ENTRY(INSUFFICIENT_CF_POLL);
1790                 TX_STATUS_ENTRY(TX_LOCKED);
1791                 TX_STATUS_ENTRY(NO_BEACON_ON_RADAR);
1792         }
1793
1794         return "UNKNOWN";
1795 }
1796
1797 /**
1798  * iwl4965_scan_cancel - Cancel any currently executing HW scan
1799  *
1800  * NOTE: priv->mutex is not required before calling this function
1801  */
1802 static int iwl4965_scan_cancel(struct iwl_priv *priv)
1803 {
1804         if (!test_bit(STATUS_SCAN_HW, &priv->status)) {
1805                 clear_bit(STATUS_SCANNING, &priv->status);
1806                 return 0;
1807         }
1808
1809         if (test_bit(STATUS_SCANNING, &priv->status)) {
1810                 if (!test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
1811                         IWL_DEBUG_SCAN("Queuing scan abort.\n");
1812                         set_bit(STATUS_SCAN_ABORTING, &priv->status);
1813                         queue_work(priv->workqueue, &priv->abort_scan);
1814
1815                 } else
1816                         IWL_DEBUG_SCAN("Scan abort already in progress.\n");
1817
1818                 return test_bit(STATUS_SCANNING, &priv->status);
1819         }
1820
1821         return 0;
1822 }
1823
1824 /**
1825  * iwl4965_scan_cancel_timeout - Cancel any currently executing HW scan
1826  * @ms: amount of time to wait (in milliseconds) for scan to abort
1827  *
1828  * NOTE: priv->mutex must be held before calling this function
1829  */
1830 static int iwl4965_scan_cancel_timeout(struct iwl_priv *priv, unsigned long ms)
1831 {
1832         unsigned long now = jiffies;
1833         int ret;
1834
1835         ret = iwl4965_scan_cancel(priv);
1836         if (ret && ms) {
1837                 mutex_unlock(&priv->mutex);
1838                 while (!time_after(jiffies, now + msecs_to_jiffies(ms)) &&
1839                                 test_bit(STATUS_SCANNING, &priv->status))
1840                         msleep(1);
1841                 mutex_lock(&priv->mutex);
1842
1843                 return test_bit(STATUS_SCANNING, &priv->status);
1844         }
1845
1846         return ret;
1847 }
1848
1849 static void iwl4965_sequence_reset(struct iwl_priv *priv)
1850 {
1851         /* Reset ieee stats */
1852
1853         /* We don't reset the net_device_stats (ieee->stats) on
1854          * re-association */
1855
1856         priv->last_seq_num = -1;
1857         priv->last_frag_num = -1;
1858         priv->last_packet_time = 0;
1859
1860         iwl4965_scan_cancel(priv);
1861 }
1862
1863 #define MAX_UCODE_BEACON_INTERVAL       4096
1864 #define INTEL_CONN_LISTEN_INTERVAL      __constant_cpu_to_le16(0xA)
1865
1866 static __le16 iwl4965_adjust_beacon_interval(u16 beacon_val)
1867 {
1868         u16 new_val = 0;
1869         u16 beacon_factor = 0;
1870
1871         beacon_factor =
1872             (beacon_val + MAX_UCODE_BEACON_INTERVAL)
1873                 / MAX_UCODE_BEACON_INTERVAL;
1874         new_val = beacon_val / beacon_factor;
1875
1876         return cpu_to_le16(new_val);
1877 }
1878
1879 static void iwl4965_setup_rxon_timing(struct iwl_priv *priv)
1880 {
1881         u64 interval_tm_unit;
1882         u64 tsf, result;
1883         unsigned long flags;
1884         struct ieee80211_conf *conf = NULL;
1885         u16 beacon_int = 0;
1886
1887         conf = ieee80211_get_hw_conf(priv->hw);
1888
1889         spin_lock_irqsave(&priv->lock, flags);
1890         priv->rxon_timing.timestamp.dw[1] = cpu_to_le32(priv->timestamp >> 32);
1891         priv->rxon_timing.timestamp.dw[0] =
1892                                 cpu_to_le32(priv->timestamp & 0xFFFFFFFF);
1893
1894         priv->rxon_timing.listen_interval = INTEL_CONN_LISTEN_INTERVAL;
1895
1896         tsf = priv->timestamp;
1897
1898         beacon_int = priv->beacon_int;
1899         spin_unlock_irqrestore(&priv->lock, flags);
1900
1901         if (priv->iw_mode == IEEE80211_IF_TYPE_STA) {
1902                 if (beacon_int == 0) {
1903                         priv->rxon_timing.beacon_interval = cpu_to_le16(100);
1904                         priv->rxon_timing.beacon_init_val = cpu_to_le32(102400);
1905                 } else {
1906                         priv->rxon_timing.beacon_interval =
1907                                 cpu_to_le16(beacon_int);
1908                         priv->rxon_timing.beacon_interval =
1909                             iwl4965_adjust_beacon_interval(
1910                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
1911                 }
1912
1913                 priv->rxon_timing.atim_window = 0;
1914         } else {
1915                 priv->rxon_timing.beacon_interval =
1916                         iwl4965_adjust_beacon_interval(conf->beacon_int);
1917                 /* TODO: we need to get atim_window from upper stack
1918                  * for now we set to 0 */
1919                 priv->rxon_timing.atim_window = 0;
1920         }
1921
1922         interval_tm_unit =
1923                 (le16_to_cpu(priv->rxon_timing.beacon_interval) * 1024);
1924         result = do_div(tsf, interval_tm_unit);
1925         priv->rxon_timing.beacon_init_val =
1926             cpu_to_le32((u32) ((u64) interval_tm_unit - result));
1927
1928         IWL_DEBUG_ASSOC
1929             ("beacon interval %d beacon timer %d beacon tim %d\n",
1930                 le16_to_cpu(priv->rxon_timing.beacon_interval),
1931                 le32_to_cpu(priv->rxon_timing.beacon_init_val),
1932                 le16_to_cpu(priv->rxon_timing.atim_window));
1933 }
1934
1935 static int iwl4965_scan_initiate(struct iwl_priv *priv)
1936 {
1937         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
1938                 IWL_ERROR("APs don't scan.\n");
1939                 return 0;
1940         }
1941
1942         if (!iwl_is_ready_rf(priv)) {
1943                 IWL_DEBUG_SCAN("Aborting scan due to not ready.\n");
1944                 return -EIO;
1945         }
1946
1947         if (test_bit(STATUS_SCANNING, &priv->status)) {
1948                 IWL_DEBUG_SCAN("Scan already in progress.\n");
1949                 return -EAGAIN;
1950         }
1951
1952         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
1953                 IWL_DEBUG_SCAN("Scan request while abort pending.  "
1954                                "Queuing.\n");
1955                 return -EAGAIN;
1956         }
1957
1958         IWL_DEBUG_INFO("Starting scan...\n");
1959         priv->scan_bands = 2;
1960         set_bit(STATUS_SCANNING, &priv->status);
1961         priv->scan_start = jiffies;
1962         priv->scan_pass_start = priv->scan_start;
1963
1964         queue_work(priv->workqueue, &priv->request_scan);
1965
1966         return 0;
1967 }
1968
1969
1970 static void iwl4965_set_flags_for_phymode(struct iwl_priv *priv,
1971                                           enum ieee80211_band band)
1972 {
1973         if (band == IEEE80211_BAND_5GHZ) {
1974                 priv->staging_rxon.flags &=
1975                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
1976                       | RXON_FLG_CCK_MSK);
1977                 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
1978         } else {
1979                 /* Copied from iwl4965_bg_post_associate() */
1980                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
1981                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
1982                 else
1983                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
1984
1985                 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
1986                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
1987
1988                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
1989                 priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
1990                 priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
1991         }
1992 }
1993
1994 /*
1995  * initialize rxon structure with default values from eeprom
1996  */
1997 static void iwl4965_connection_init_rx_config(struct iwl_priv *priv)
1998 {
1999         const struct iwl_channel_info *ch_info;
2000
2001         memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
2002
2003         switch (priv->iw_mode) {
2004         case IEEE80211_IF_TYPE_AP:
2005                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
2006                 break;
2007
2008         case IEEE80211_IF_TYPE_STA:
2009                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
2010                 priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
2011                 break;
2012
2013         case IEEE80211_IF_TYPE_IBSS:
2014                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
2015                 priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
2016                 priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
2017                                                   RXON_FILTER_ACCEPT_GRP_MSK;
2018                 break;
2019
2020         case IEEE80211_IF_TYPE_MNTR:
2021                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_SNIFFER;
2022                 priv->staging_rxon.filter_flags = RXON_FILTER_PROMISC_MSK |
2023                     RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_ACCEPT_GRP_MSK;
2024                 break;
2025         default:
2026                 IWL_ERROR("Unsupported interface type %d\n", priv->iw_mode);
2027                 break;
2028         }
2029
2030 #if 0
2031         /* TODO:  Figure out when short_preamble would be set and cache from
2032          * that */
2033         if (!hw_to_local(priv->hw)->short_preamble)
2034                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2035         else
2036                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2037 #endif
2038
2039         ch_info = iwl_get_channel_info(priv, priv->band,
2040                                        le16_to_cpu(priv->staging_rxon.channel));
2041
2042         if (!ch_info)
2043                 ch_info = &priv->channel_info[0];
2044
2045         /*
2046          * in some case A channels are all non IBSS
2047          * in this case force B/G channel
2048          */
2049         if ((priv->iw_mode == IEEE80211_IF_TYPE_IBSS) &&
2050             !(is_channel_ibss(ch_info)))
2051                 ch_info = &priv->channel_info[0];
2052
2053         priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
2054         priv->band = ch_info->band;
2055
2056         iwl4965_set_flags_for_phymode(priv, priv->band);
2057
2058         priv->staging_rxon.ofdm_basic_rates =
2059             (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
2060         priv->staging_rxon.cck_basic_rates =
2061             (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
2062
2063         priv->staging_rxon.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED_MSK |
2064                                         RXON_FLG_CHANNEL_MODE_PURE_40_MSK);
2065         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2066         memcpy(priv->staging_rxon.wlap_bssid_addr, priv->mac_addr, ETH_ALEN);
2067         priv->staging_rxon.ofdm_ht_single_stream_basic_rates = 0xff;
2068         priv->staging_rxon.ofdm_ht_dual_stream_basic_rates = 0xff;
2069         iwl4965_set_rxon_chain(priv);
2070 }
2071
2072 static int iwl4965_set_mode(struct iwl_priv *priv, int mode)
2073 {
2074         if (mode == IEEE80211_IF_TYPE_IBSS) {
2075                 const struct iwl_channel_info *ch_info;
2076
2077                 ch_info = iwl_get_channel_info(priv,
2078                         priv->band,
2079                         le16_to_cpu(priv->staging_rxon.channel));
2080
2081                 if (!ch_info || !is_channel_ibss(ch_info)) {
2082                         IWL_ERROR("channel %d not IBSS channel\n",
2083                                   le16_to_cpu(priv->staging_rxon.channel));
2084                         return -EINVAL;
2085                 }
2086         }
2087
2088         priv->iw_mode = mode;
2089
2090         iwl4965_connection_init_rx_config(priv);
2091         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2092
2093         iwlcore_clear_stations_table(priv);
2094
2095         /* dont commit rxon if rf-kill is on*/
2096         if (!iwl_is_ready_rf(priv))
2097                 return -EAGAIN;
2098
2099         cancel_delayed_work(&priv->scan_check);
2100         if (iwl4965_scan_cancel_timeout(priv, 100)) {
2101                 IWL_WARNING("Aborted scan still in progress after 100ms\n");
2102                 IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
2103                 return -EAGAIN;
2104         }
2105
2106         iwl4965_commit_rxon(priv);
2107
2108         return 0;
2109 }
2110
2111 static void iwl4965_build_tx_cmd_hwcrypto(struct iwl_priv *priv,
2112                                       struct ieee80211_tx_control *ctl,
2113                                       struct iwl_cmd *cmd,
2114                                       struct sk_buff *skb_frag,
2115                                       int sta_id)
2116 {
2117         struct iwl4965_hw_key *keyinfo = &priv->stations[sta_id].keyinfo;
2118
2119         switch (keyinfo->alg) {
2120         case ALG_CCMP:
2121                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_CCM;
2122                 memcpy(cmd->cmd.tx.key, keyinfo->key, keyinfo->keylen);
2123                 if (ctl->flags & IEEE80211_TXCTL_AMPDU)
2124                         cmd->cmd.tx.tx_flags |= TX_CMD_FLG_AGG_CCMP_MSK;
2125                 IWL_DEBUG_TX("tx_cmd with aes hwcrypto\n");
2126                 break;
2127
2128         case ALG_TKIP:
2129                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_TKIP;
2130                 ieee80211_get_tkip_key(keyinfo->conf, skb_frag,
2131                         IEEE80211_TKIP_P2_KEY, cmd->cmd.tx.key);
2132                 IWL_DEBUG_TX("tx_cmd with tkip hwcrypto\n");
2133                 break;
2134
2135         case ALG_WEP:
2136                 cmd->cmd.tx.sec_ctl = TX_CMD_SEC_WEP |
2137                         (ctl->key_idx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT;
2138
2139                 if (keyinfo->keylen == 13)
2140                         cmd->cmd.tx.sec_ctl |= TX_CMD_SEC_KEY128;
2141
2142                 memcpy(&cmd->cmd.tx.key[3], keyinfo->key, keyinfo->keylen);
2143
2144                 IWL_DEBUG_TX("Configuring packet for WEP encryption "
2145                              "with key %d\n", ctl->key_idx);
2146                 break;
2147
2148         default:
2149                 printk(KERN_ERR "Unknown encode alg %d\n", keyinfo->alg);
2150                 break;
2151         }
2152 }
2153
2154 /*
2155  * handle build REPLY_TX command notification.
2156  */
2157 static void iwl4965_build_tx_cmd_basic(struct iwl_priv *priv,
2158                                   struct iwl_cmd *cmd,
2159                                   struct ieee80211_tx_control *ctrl,
2160                                   struct ieee80211_hdr *hdr,
2161                                   int is_unicast, u8 std_id)
2162 {
2163         __le16 *qc;
2164         u16 fc = le16_to_cpu(hdr->frame_control);
2165         __le32 tx_flags = cmd->cmd.tx.tx_flags;
2166
2167         cmd->cmd.tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
2168         if (!(ctrl->flags & IEEE80211_TXCTL_NO_ACK)) {
2169                 tx_flags |= TX_CMD_FLG_ACK_MSK;
2170                 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT)
2171                         tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2172                 if (ieee80211_is_probe_response(fc) &&
2173                     !(le16_to_cpu(hdr->seq_ctrl) & 0xf))
2174                         tx_flags |= TX_CMD_FLG_TSF_MSK;
2175         } else {
2176                 tx_flags &= (~TX_CMD_FLG_ACK_MSK);
2177                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2178         }
2179
2180         if (ieee80211_is_back_request(fc))
2181                 tx_flags |= TX_CMD_FLG_ACK_MSK | TX_CMD_FLG_IMM_BA_RSP_MASK;
2182
2183
2184         cmd->cmd.tx.sta_id = std_id;
2185         if (ieee80211_get_morefrag(hdr))
2186                 tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK;
2187
2188         qc = ieee80211_get_qos_ctrl(hdr);
2189         if (qc) {
2190                 cmd->cmd.tx.tid_tspec = (u8) (le16_to_cpu(*qc) & 0xf);
2191                 tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK;
2192         } else
2193                 tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK;
2194
2195         if (ctrl->flags & IEEE80211_TXCTL_USE_RTS_CTS) {
2196                 tx_flags |= TX_CMD_FLG_RTS_MSK;
2197                 tx_flags &= ~TX_CMD_FLG_CTS_MSK;
2198         } else if (ctrl->flags & IEEE80211_TXCTL_USE_CTS_PROTECT) {
2199                 tx_flags &= ~TX_CMD_FLG_RTS_MSK;
2200                 tx_flags |= TX_CMD_FLG_CTS_MSK;
2201         }
2202
2203         if ((tx_flags & TX_CMD_FLG_RTS_MSK) || (tx_flags & TX_CMD_FLG_CTS_MSK))
2204                 tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
2205
2206         tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK);
2207         if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
2208                 if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_ASSOC_REQ ||
2209                     (fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_REASSOC_REQ)
2210                         cmd->cmd.tx.timeout.pm_frame_timeout = cpu_to_le16(3);
2211                 else
2212                         cmd->cmd.tx.timeout.pm_frame_timeout = cpu_to_le16(2);
2213         } else {
2214                 cmd->cmd.tx.timeout.pm_frame_timeout = 0;
2215         }
2216
2217         cmd->cmd.tx.driver_txop = 0;
2218         cmd->cmd.tx.tx_flags = tx_flags;
2219         cmd->cmd.tx.next_frame_len = 0;
2220 }
2221 static void iwl_update_tx_stats(struct iwl_priv *priv, u16 fc, u16 len)
2222 {
2223         /* 0 - mgmt, 1 - cnt, 2 - data */
2224         int idx = (fc & IEEE80211_FCTL_FTYPE) >> 2;
2225         priv->tx_stats[idx].cnt++;
2226         priv->tx_stats[idx].bytes += len;
2227 }
2228 /**
2229  * iwl4965_get_sta_id - Find station's index within station table
2230  *
2231  * If new IBSS station, create new entry in station table
2232  */
2233 static int iwl4965_get_sta_id(struct iwl_priv *priv,
2234                                 struct ieee80211_hdr *hdr)
2235 {
2236         int sta_id;
2237         u16 fc = le16_to_cpu(hdr->frame_control);
2238         DECLARE_MAC_BUF(mac);
2239
2240         /* If this frame is broadcast or management, use broadcast station id */
2241         if (((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA) ||
2242             is_multicast_ether_addr(hdr->addr1))
2243                 return priv->hw_setting.bcast_sta_id;
2244
2245         switch (priv->iw_mode) {
2246
2247         /* If we are a client station in a BSS network, use the special
2248          * AP station entry (that's the only station we communicate with) */
2249         case IEEE80211_IF_TYPE_STA:
2250                 return IWL_AP_ID;
2251
2252         /* If we are an AP, then find the station, or use BCAST */
2253         case IEEE80211_IF_TYPE_AP:
2254                 sta_id = iwl4965_hw_find_station(priv, hdr->addr1);
2255                 if (sta_id != IWL_INVALID_STATION)
2256                         return sta_id;
2257                 return priv->hw_setting.bcast_sta_id;
2258
2259         /* If this frame is going out to an IBSS network, find the station,
2260          * or create a new station table entry */
2261         case IEEE80211_IF_TYPE_IBSS:
2262                 sta_id = iwl4965_hw_find_station(priv, hdr->addr1);
2263                 if (sta_id != IWL_INVALID_STATION)
2264                         return sta_id;
2265
2266                 /* Create new station table entry */
2267                 sta_id = iwl4965_add_station_flags(priv, hdr->addr1,
2268                                                    0, CMD_ASYNC, NULL);
2269
2270                 if (sta_id != IWL_INVALID_STATION)
2271                         return sta_id;
2272
2273                 IWL_DEBUG_DROP("Station %s not in station map. "
2274                                "Defaulting to broadcast...\n",
2275                                print_mac(mac, hdr->addr1));
2276                 iwl_print_hex_dump(IWL_DL_DROP, (u8 *) hdr, sizeof(*hdr));
2277                 return priv->hw_setting.bcast_sta_id;
2278
2279         default:
2280                 IWL_WARNING("Unknown mode of operation: %d", priv->iw_mode);
2281                 return priv->hw_setting.bcast_sta_id;
2282         }
2283 }
2284
2285 /*
2286  * start REPLY_TX command process
2287  */
2288 static int iwl4965_tx_skb(struct iwl_priv *priv,
2289                       struct sk_buff *skb, struct ieee80211_tx_control *ctl)
2290 {
2291         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
2292         struct iwl4965_tfd_frame *tfd;
2293         u32 *control_flags;
2294         int txq_id = ctl->queue;
2295         struct iwl4965_tx_queue *txq = NULL;
2296         struct iwl4965_queue *q = NULL;
2297         dma_addr_t phys_addr;
2298         dma_addr_t txcmd_phys;
2299         dma_addr_t scratch_phys;
2300         struct iwl_cmd *out_cmd = NULL;
2301         u16 len, idx, len_org;
2302         u8 id, hdr_len, unicast;
2303         u8 sta_id;
2304         u16 seq_number = 0;
2305         u16 fc;
2306         __le16 *qc;
2307         u8 wait_write_ptr = 0;
2308         unsigned long flags;
2309         int rc;
2310
2311         spin_lock_irqsave(&priv->lock, flags);
2312         if (iwl_is_rfkill(priv)) {
2313                 IWL_DEBUG_DROP("Dropping - RF KILL\n");
2314                 goto drop_unlock;
2315         }
2316
2317         if (!priv->vif) {
2318                 IWL_DEBUG_DROP("Dropping - !priv->vif\n");
2319                 goto drop_unlock;
2320         }
2321
2322         if ((ctl->tx_rate->hw_value & 0xFF) == IWL_INVALID_RATE) {
2323                 IWL_ERROR("ERROR: No TX rate available.\n");
2324                 goto drop_unlock;
2325         }
2326
2327         unicast = !is_multicast_ether_addr(hdr->addr1);
2328         id = 0;
2329
2330         fc = le16_to_cpu(hdr->frame_control);
2331
2332 #ifdef CONFIG_IWLWIFI_DEBUG
2333         if (ieee80211_is_auth(fc))
2334                 IWL_DEBUG_TX("Sending AUTH frame\n");
2335         else if (ieee80211_is_assoc_request(fc))
2336                 IWL_DEBUG_TX("Sending ASSOC frame\n");
2337         else if (ieee80211_is_reassoc_request(fc))
2338                 IWL_DEBUG_TX("Sending REASSOC frame\n");
2339 #endif
2340
2341         /* drop all data frame if we are not associated */
2342         if (((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA) &&
2343            (!iwl_is_associated(priv) ||
2344             ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && !priv->assoc_id) ||
2345             !priv->assoc_station_added)) {
2346                 IWL_DEBUG_DROP("Dropping - !iwl_is_associated\n");
2347                 goto drop_unlock;
2348         }
2349
2350         spin_unlock_irqrestore(&priv->lock, flags);
2351
2352         hdr_len = ieee80211_get_hdrlen(fc);
2353
2354         /* Find (or create) index into station table for destination station */
2355         sta_id = iwl4965_get_sta_id(priv, hdr);
2356         if (sta_id == IWL_INVALID_STATION) {
2357                 DECLARE_MAC_BUF(mac);
2358
2359                 IWL_DEBUG_DROP("Dropping - INVALID STATION: %s\n",
2360                                print_mac(mac, hdr->addr1));
2361                 goto drop;
2362         }
2363
2364         IWL_DEBUG_RATE("station Id %d\n", sta_id);
2365
2366         qc = ieee80211_get_qos_ctrl(hdr);
2367         if (qc) {
2368                 u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
2369                 seq_number = priv->stations[sta_id].tid[tid].seq_number &
2370                                 IEEE80211_SCTL_SEQ;
2371                 hdr->seq_ctrl = cpu_to_le16(seq_number) |
2372                         (hdr->seq_ctrl &
2373                                 __constant_cpu_to_le16(IEEE80211_SCTL_FRAG));
2374                 seq_number += 0x10;
2375 #ifdef CONFIG_IWL4965_HT
2376                 /* aggregation is on for this <sta,tid> */
2377                 if (ctl->flags & IEEE80211_TXCTL_AMPDU)
2378                         txq_id = priv->stations[sta_id].tid[tid].agg.txq_id;
2379                 priv->stations[sta_id].tid[tid].tfds_in_queue++;
2380 #endif /* CONFIG_IWL4965_HT */
2381         }
2382
2383         /* Descriptor for chosen Tx queue */
2384         txq = &priv->txq[txq_id];
2385         q = &txq->q;
2386
2387         spin_lock_irqsave(&priv->lock, flags);
2388
2389         /* Set up first empty TFD within this queue's circular TFD buffer */
2390         tfd = &txq->bd[q->write_ptr];
2391         memset(tfd, 0, sizeof(*tfd));
2392         control_flags = (u32 *) tfd;
2393         idx = get_cmd_index(q, q->write_ptr, 0);
2394
2395         /* Set up driver data for this TFD */
2396         memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl4965_tx_info));
2397         txq->txb[q->write_ptr].skb[0] = skb;
2398         memcpy(&(txq->txb[q->write_ptr].status.control),
2399                ctl, sizeof(struct ieee80211_tx_control));
2400
2401         /* Set up first empty entry in queue's array of Tx/cmd buffers */
2402         out_cmd = &txq->cmd[idx];
2403         memset(&out_cmd->hdr, 0, sizeof(out_cmd->hdr));
2404         memset(&out_cmd->cmd.tx, 0, sizeof(out_cmd->cmd.tx));
2405
2406         /*
2407          * Set up the Tx-command (not MAC!) header.
2408          * Store the chosen Tx queue and TFD index within the sequence field;
2409          * after Tx, uCode's Tx response will return this value so driver can
2410          * locate the frame within the tx queue and do post-tx processing.
2411          */
2412         out_cmd->hdr.cmd = REPLY_TX;
2413         out_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
2414                                 INDEX_TO_SEQ(q->write_ptr)));
2415
2416         /* Copy MAC header from skb into command buffer */
2417         memcpy(out_cmd->cmd.tx.hdr, hdr, hdr_len);
2418
2419         /*
2420          * Use the first empty entry in this queue's command buffer array
2421          * to contain the Tx command and MAC header concatenated together
2422          * (payload data will be in another buffer).
2423          * Size of this varies, due to varying MAC header length.
2424          * If end is not dword aligned, we'll have 2 extra bytes at the end
2425          * of the MAC header (device reads on dword boundaries).
2426          * We'll tell device about this padding later.
2427          */
2428         len = priv->hw_setting.tx_cmd_len +
2429                 sizeof(struct iwl_cmd_header) + hdr_len;
2430
2431         len_org = len;
2432         len = (len + 3) & ~3;
2433
2434         if (len_org != len)
2435                 len_org = 1;
2436         else
2437                 len_org = 0;
2438
2439         /* Physical address of this Tx command's header (not MAC header!),
2440          * within command buffer array. */
2441         txcmd_phys = txq->dma_addr_cmd + sizeof(struct iwl_cmd) * idx +
2442                      offsetof(struct iwl_cmd, hdr);
2443
2444         /* Add buffer containing Tx command and MAC(!) header to TFD's
2445          * first entry */
2446         iwl4965_hw_txq_attach_buf_to_tfd(priv, tfd, txcmd_phys, len);
2447
2448         if (!(ctl->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT))
2449                 iwl4965_build_tx_cmd_hwcrypto(priv, ctl, out_cmd, skb, sta_id);
2450
2451         /* Set up TFD's 2nd entry to point directly to remainder of skb,
2452          * if any (802.11 null frames have no payload). */
2453         len = skb->len - hdr_len;
2454         if (len) {
2455                 phys_addr = pci_map_single(priv->pci_dev, skb->data + hdr_len,
2456                                            len, PCI_DMA_TODEVICE);
2457                 iwl4965_hw_txq_attach_buf_to_tfd(priv, tfd, phys_addr, len);
2458         }
2459
2460         /* Tell 4965 about any 2-byte padding after MAC header */
2461         if (len_org)
2462                 out_cmd->cmd.tx.tx_flags |= TX_CMD_FLG_MH_PAD_MSK;
2463
2464         /* Total # bytes to be transmitted */
2465         len = (u16)skb->len;
2466         out_cmd->cmd.tx.len = cpu_to_le16(len);
2467
2468         /* TODO need this for burst mode later on */
2469         iwl4965_build_tx_cmd_basic(priv, out_cmd, ctl, hdr, unicast, sta_id);
2470
2471         /* set is_hcca to 0; it probably will never be implemented */
2472         iwl4965_hw_build_tx_cmd_rate(priv, out_cmd, ctl, hdr, sta_id, 0);
2473
2474         iwl_update_tx_stats(priv, fc, len);
2475
2476         scratch_phys = txcmd_phys + sizeof(struct iwl_cmd_header) +
2477                 offsetof(struct iwl4965_tx_cmd, scratch);
2478         out_cmd->cmd.tx.dram_lsb_ptr = cpu_to_le32(scratch_phys);
2479         out_cmd->cmd.tx.dram_msb_ptr = iwl_get_dma_hi_address(scratch_phys);
2480
2481         if (!ieee80211_get_morefrag(hdr)) {
2482                 txq->need_update = 1;
2483                 if (qc) {
2484                         u8 tid = (u8)(le16_to_cpu(*qc) & 0xf);
2485                         priv->stations[sta_id].tid[tid].seq_number = seq_number;
2486                 }
2487         } else {
2488                 wait_write_ptr = 1;
2489                 txq->need_update = 0;
2490         }
2491
2492         iwl_print_hex_dump(IWL_DL_TX, out_cmd->cmd.payload,
2493                            sizeof(out_cmd->cmd.tx));
2494
2495         iwl_print_hex_dump(IWL_DL_TX, (u8 *)out_cmd->cmd.tx.hdr,
2496                            ieee80211_get_hdrlen(fc));
2497
2498         /* Set up entry for this TFD in Tx byte-count array */
2499         iwl4965_tx_queue_update_wr_ptr(priv, txq, len);
2500
2501         /* Tell device the write index *just past* this latest filled TFD */
2502         q->write_ptr = iwl_queue_inc_wrap(q->write_ptr, q->n_bd);
2503         rc = iwl4965_tx_queue_update_write_ptr(priv, txq);
2504         spin_unlock_irqrestore(&priv->lock, flags);
2505
2506         if (rc)
2507                 return rc;
2508
2509         if ((iwl4965_queue_space(q) < q->high_mark)
2510             && priv->mac80211_registered) {
2511                 if (wait_write_ptr) {
2512                         spin_lock_irqsave(&priv->lock, flags);
2513                         txq->need_update = 1;
2514                         iwl4965_tx_queue_update_write_ptr(priv, txq);
2515                         spin_unlock_irqrestore(&priv->lock, flags);
2516                 }
2517
2518                 ieee80211_stop_queue(priv->hw, ctl->queue);
2519         }
2520
2521         return 0;
2522
2523 drop_unlock:
2524         spin_unlock_irqrestore(&priv->lock, flags);
2525 drop:
2526         return -1;
2527 }
2528
2529 static void iwl4965_set_rate(struct iwl_priv *priv)
2530 {
2531         const struct ieee80211_supported_band *hw = NULL;
2532         struct ieee80211_rate *rate;
2533         int i;
2534
2535         hw = iwl4965_get_hw_mode(priv, priv->band);
2536         if (!hw) {
2537                 IWL_ERROR("Failed to set rate: unable to get hw mode\n");
2538                 return;
2539         }
2540
2541         priv->active_rate = 0;
2542         priv->active_rate_basic = 0;
2543
2544         for (i = 0; i < hw->n_bitrates; i++) {
2545                 rate = &(hw->bitrates[i]);
2546                 if (rate->hw_value < IWL_RATE_COUNT)
2547                         priv->active_rate |= (1 << rate->hw_value);
2548         }
2549
2550         IWL_DEBUG_RATE("Set active_rate = %0x, active_rate_basic = %0x\n",
2551                        priv->active_rate, priv->active_rate_basic);
2552
2553         /*
2554          * If a basic rate is configured, then use it (adding IWL_RATE_1M_MASK)
2555          * otherwise set it to the default of all CCK rates and 6, 12, 24 for
2556          * OFDM
2557          */
2558         if (priv->active_rate_basic & IWL_CCK_BASIC_RATES_MASK)
2559                 priv->staging_rxon.cck_basic_rates =
2560                     ((priv->active_rate_basic &
2561                       IWL_CCK_RATES_MASK) >> IWL_FIRST_CCK_RATE) & 0xF;
2562         else
2563                 priv->staging_rxon.cck_basic_rates =
2564                     (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
2565
2566         if (priv->active_rate_basic & IWL_OFDM_BASIC_RATES_MASK)
2567                 priv->staging_rxon.ofdm_basic_rates =
2568                     ((priv->active_rate_basic &
2569                       (IWL_OFDM_BASIC_RATES_MASK | IWL_RATE_6M_MASK)) >>
2570                       IWL_FIRST_OFDM_RATE) & 0xFF;
2571         else
2572                 priv->staging_rxon.ofdm_basic_rates =
2573                    (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
2574 }
2575
2576 void iwl4965_radio_kill_sw(struct iwl_priv *priv, int disable_radio)
2577 {
2578         unsigned long flags;
2579
2580         if (!!disable_radio == test_bit(STATUS_RF_KILL_SW, &priv->status))
2581                 return;
2582
2583         IWL_DEBUG_RF_KILL("Manual SW RF KILL set to: RADIO %s\n",
2584                           disable_radio ? "OFF" : "ON");
2585
2586         if (disable_radio) {
2587                 iwl4965_scan_cancel(priv);
2588                 /* FIXME: This is a workaround for AP */
2589                 if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
2590                         spin_lock_irqsave(&priv->lock, flags);
2591                         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
2592                                     CSR_UCODE_SW_BIT_RFKILL);
2593                         spin_unlock_irqrestore(&priv->lock, flags);
2594                         /* call the host command only if no hw rf-kill set */
2595                         if (!test_bit(STATUS_RF_KILL_HW, &priv->status))
2596                                 iwl4965_send_card_state(priv,
2597                                                         CARD_STATE_CMD_DISABLE,
2598                                                         0);
2599                         set_bit(STATUS_RF_KILL_SW, &priv->status);
2600
2601                         /* make sure mac80211 stop sending Tx frame */
2602                         if (priv->mac80211_registered)
2603                                 ieee80211_stop_queues(priv->hw);
2604                 }
2605                 return;
2606         }
2607
2608         spin_lock_irqsave(&priv->lock, flags);
2609         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2610
2611         clear_bit(STATUS_RF_KILL_SW, &priv->status);
2612         spin_unlock_irqrestore(&priv->lock, flags);
2613
2614         /* wake up ucode */
2615         msleep(10);
2616
2617         spin_lock_irqsave(&priv->lock, flags);
2618         iwl_read32(priv, CSR_UCODE_DRV_GP1);
2619         if (!iwl_grab_nic_access(priv))
2620                 iwl_release_nic_access(priv);
2621         spin_unlock_irqrestore(&priv->lock, flags);
2622
2623         if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
2624                 IWL_DEBUG_RF_KILL("Can not turn radio back on - "
2625                                   "disabled by HW switch\n");
2626                 return;
2627         }
2628
2629         queue_work(priv->workqueue, &priv->restart);
2630         return;
2631 }
2632
2633 void iwl4965_set_decrypted_flag(struct iwl_priv *priv, struct sk_buff *skb,
2634                             u32 decrypt_res, struct ieee80211_rx_status *stats)
2635 {
2636         u16 fc =
2637             le16_to_cpu(((struct ieee80211_hdr *)skb->data)->frame_control);
2638
2639         if (priv->active_rxon.filter_flags & RXON_FILTER_DIS_DECRYPT_MSK)
2640                 return;
2641
2642         if (!(fc & IEEE80211_FCTL_PROTECTED))
2643                 return;
2644
2645         IWL_DEBUG_RX("decrypt_res:0x%x\n", decrypt_res);
2646         switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) {
2647         case RX_RES_STATUS_SEC_TYPE_TKIP:
2648                 /* The uCode has got a bad phase 1 Key, pushes the packet.
2649                  * Decryption will be done in SW. */
2650                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2651                     RX_RES_STATUS_BAD_KEY_TTAK)
2652                         break;
2653
2654                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2655                     RX_RES_STATUS_BAD_ICV_MIC)
2656                         stats->flag |= RX_FLAG_MMIC_ERROR;
2657         case RX_RES_STATUS_SEC_TYPE_WEP:
2658         case RX_RES_STATUS_SEC_TYPE_CCMP:
2659                 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2660                     RX_RES_STATUS_DECRYPT_OK) {
2661                         IWL_DEBUG_RX("hw decrypt successfully!!!\n");
2662                         stats->flag |= RX_FLAG_DECRYPTED;
2663                 }
2664                 break;
2665
2666         default:
2667                 break;
2668         }
2669 }
2670
2671
2672 #define IWL_PACKET_RETRY_TIME HZ
2673
2674 int iwl4965_is_duplicate_packet(struct iwl_priv *priv, struct ieee80211_hdr *header)
2675 {
2676         u16 sc = le16_to_cpu(header->seq_ctrl);
2677         u16 seq = (sc & IEEE80211_SCTL_SEQ) >> 4;
2678         u16 frag = sc & IEEE80211_SCTL_FRAG;
2679         u16 *last_seq, *last_frag;
2680         unsigned long *last_time;
2681
2682         switch (priv->iw_mode) {
2683         case IEEE80211_IF_TYPE_IBSS:{
2684                 struct list_head *p;
2685                 struct iwl4965_ibss_seq *entry = NULL;
2686                 u8 *mac = header->addr2;
2687                 int index = mac[5] & (IWL_IBSS_MAC_HASH_SIZE - 1);
2688
2689                 __list_for_each(p, &priv->ibss_mac_hash[index]) {
2690                         entry = list_entry(p, struct iwl4965_ibss_seq, list);
2691                         if (!compare_ether_addr(entry->mac, mac))
2692                                 break;
2693                 }
2694                 if (p == &priv->ibss_mac_hash[index]) {
2695                         entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
2696                         if (!entry) {
2697                                 IWL_ERROR("Cannot malloc new mac entry\n");
2698                                 return 0;
2699                         }
2700                         memcpy(entry->mac, mac, ETH_ALEN);
2701                         entry->seq_num = seq;
2702                         entry->frag_num = frag;
2703                         entry->packet_time = jiffies;
2704                         list_add(&entry->list, &priv->ibss_mac_hash[index]);
2705                         return 0;
2706                 }
2707                 last_seq = &entry->seq_num;
2708                 last_frag = &entry->frag_num;
2709                 last_time = &entry->packet_time;
2710                 break;
2711         }
2712         case IEEE80211_IF_TYPE_STA:
2713                 last_seq = &priv->last_seq_num;
2714                 last_frag = &priv->last_frag_num;
2715                 last_time = &priv->last_packet_time;
2716                 break;
2717         default:
2718                 return 0;
2719         }
2720         if ((*last_seq == seq) &&
2721             time_after(*last_time + IWL_PACKET_RETRY_TIME, jiffies)) {
2722                 if (*last_frag == frag)
2723                         goto drop;
2724                 if (*last_frag + 1 != frag)
2725                         /* out-of-order fragment */
2726                         goto drop;
2727         } else
2728                 *last_seq = seq;
2729
2730         *last_frag = frag;
2731         *last_time = jiffies;
2732         return 0;
2733
2734  drop:
2735         return 1;
2736 }
2737
2738 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
2739
2740 #include "iwl-spectrum.h"
2741
2742 #define BEACON_TIME_MASK_LOW    0x00FFFFFF
2743 #define BEACON_TIME_MASK_HIGH   0xFF000000
2744 #define TIME_UNIT               1024
2745
2746 /*
2747  * extended beacon time format
2748  * time in usec will be changed into a 32-bit value in 8:24 format
2749  * the high 1 byte is the beacon counts
2750  * the lower 3 bytes is the time in usec within one beacon interval
2751  */
2752
2753 static u32 iwl4965_usecs_to_beacons(u32 usec, u32 beacon_interval)
2754 {
2755         u32 quot;
2756         u32 rem;
2757         u32 interval = beacon_interval * 1024;
2758
2759         if (!interval || !usec)
2760                 return 0;
2761
2762         quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
2763         rem = (usec % interval) & BEACON_TIME_MASK_LOW;
2764
2765         return (quot << 24) + rem;
2766 }
2767
2768 /* base is usually what we get from ucode with each received frame,
2769  * the same as HW timer counter counting down
2770  */
2771
2772 static __le32 iwl4965_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
2773 {
2774         u32 base_low = base & BEACON_TIME_MASK_LOW;
2775         u32 addon_low = addon & BEACON_TIME_MASK_LOW;
2776         u32 interval = beacon_interval * TIME_UNIT;
2777         u32 res = (base & BEACON_TIME_MASK_HIGH) +
2778             (addon & BEACON_TIME_MASK_HIGH);
2779
2780         if (base_low > addon_low)
2781                 res += base_low - addon_low;
2782         else if (base_low < addon_low) {
2783                 res += interval + base_low - addon_low;
2784                 res += (1 << 24);
2785         } else
2786                 res += (1 << 24);
2787
2788         return cpu_to_le32(res);
2789 }
2790
2791 static int iwl4965_get_measurement(struct iwl_priv *priv,
2792                                struct ieee80211_measurement_params *params,
2793                                u8 type)
2794 {
2795         struct iwl4965_spectrum_cmd spectrum;
2796         struct iwl4965_rx_packet *res;
2797         struct iwl_host_cmd cmd = {
2798                 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
2799                 .data = (void *)&spectrum,
2800                 .meta.flags = CMD_WANT_SKB,
2801         };
2802         u32 add_time = le64_to_cpu(params->start_time);
2803         int rc;
2804         int spectrum_resp_status;
2805         int duration = le16_to_cpu(params->duration);
2806
2807         if (iwl_is_associated(priv))
2808                 add_time =
2809                     iwl4965_usecs_to_beacons(
2810                         le64_to_cpu(params->start_time) - priv->last_tsf,
2811                         le16_to_cpu(priv->rxon_timing.beacon_interval));
2812
2813         memset(&spectrum, 0, sizeof(spectrum));
2814
2815         spectrum.channel_count = cpu_to_le16(1);
2816         spectrum.flags =
2817             RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
2818         spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
2819         cmd.len = sizeof(spectrum);
2820         spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
2821
2822         if (iwl_is_associated(priv))
2823                 spectrum.start_time =
2824                     iwl4965_add_beacon_time(priv->last_beacon_time,
2825                                 add_time,
2826                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
2827         else
2828                 spectrum.start_time = 0;
2829
2830         spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
2831         spectrum.channels[0].channel = params->channel;
2832         spectrum.channels[0].type = type;
2833         if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
2834                 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
2835                     RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
2836
2837         rc = iwl_send_cmd_sync(priv, &cmd);
2838         if (rc)
2839                 return rc;
2840
2841         res = (struct iwl4965_rx_packet *)cmd.meta.u.skb->data;
2842         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
2843                 IWL_ERROR("Bad return from REPLY_RX_ON_ASSOC command\n");
2844                 rc = -EIO;
2845         }
2846
2847         spectrum_resp_status = le16_to_cpu(res->u.spectrum.status);
2848         switch (spectrum_resp_status) {
2849         case 0:         /* Command will be handled */
2850                 if (res->u.spectrum.id != 0xff) {
2851                         IWL_DEBUG_INFO
2852                             ("Replaced existing measurement: %d\n",
2853                              res->u.spectrum.id);
2854                         priv->measurement_status &= ~MEASUREMENT_READY;
2855                 }
2856                 priv->measurement_status |= MEASUREMENT_ACTIVE;
2857                 rc = 0;
2858                 break;
2859
2860         case 1:         /* Command will not be handled */
2861                 rc = -EAGAIN;
2862                 break;
2863         }
2864
2865         dev_kfree_skb_any(cmd.meta.u.skb);
2866
2867         return rc;
2868 }
2869 #endif
2870
2871 static void iwl4965_txstatus_to_ieee(struct iwl_priv *priv,
2872                                  struct iwl4965_tx_info *tx_sta)
2873 {
2874
2875         tx_sta->status.ack_signal = 0;
2876         tx_sta->status.excessive_retries = 0;
2877         tx_sta->status.queue_length = 0;
2878         tx_sta->status.queue_number = 0;
2879
2880         if (in_interrupt())
2881                 ieee80211_tx_status_irqsafe(priv->hw,
2882                                             tx_sta->skb[0], &(tx_sta->status));
2883         else
2884                 ieee80211_tx_status(priv->hw,
2885                                     tx_sta->skb[0], &(tx_sta->status));
2886
2887         tx_sta->skb[0] = NULL;
2888 }
2889
2890 /**
2891  * iwl4965_tx_queue_reclaim - Reclaim Tx queue entries already Tx'd
2892  *
2893  * When FW advances 'R' index, all entries between old and new 'R' index
2894  * need to be reclaimed. As result, some free space forms.  If there is
2895  * enough free space (> low mark), wake the stack that feeds us.
2896  */
2897 int iwl4965_tx_queue_reclaim(struct iwl_priv *priv, int txq_id, int index)
2898 {
2899         struct iwl4965_tx_queue *txq = &priv->txq[txq_id];
2900         struct iwl4965_queue *q = &txq->q;
2901         int nfreed = 0;
2902
2903         if ((index >= q->n_bd) || (x2_queue_used(q, index) == 0)) {
2904                 IWL_ERROR("Read index for DMA queue txq id (%d), index %d, "
2905                           "is out of range [0-%d] %d %d.\n", txq_id,
2906                           index, q->n_bd, q->write_ptr, q->read_ptr);
2907                 return 0;
2908         }
2909
2910         for (index = iwl_queue_inc_wrap(index, q->n_bd);
2911                 q->read_ptr != index;
2912                 q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd)) {
2913                 if (txq_id != IWL_CMD_QUEUE_NUM) {
2914                         iwl4965_txstatus_to_ieee(priv,
2915                                         &(txq->txb[txq->q.read_ptr]));
2916                         iwl4965_hw_txq_free_tfd(priv, txq);
2917                 } else if (nfreed > 1) {
2918                         IWL_ERROR("HCMD skipped: index (%d) %d %d\n", index,
2919                                         q->write_ptr, q->read_ptr);
2920                         queue_work(priv->workqueue, &priv->restart);
2921                 }
2922                 nfreed++;
2923         }
2924
2925 /*      if (iwl4965_queue_space(q) > q->low_mark && (txq_id >= 0) &&
2926                         (txq_id != IWL_CMD_QUEUE_NUM) &&
2927                         priv->mac80211_registered)
2928                 ieee80211_wake_queue(priv->hw, txq_id); */
2929
2930
2931         return nfreed;
2932 }
2933
2934 static int iwl4965_is_tx_success(u32 status)
2935 {
2936         status &= TX_STATUS_MSK;
2937         return (status == TX_STATUS_SUCCESS)
2938             || (status == TX_STATUS_DIRECT_DONE);
2939 }
2940
2941 /******************************************************************************
2942  *
2943  * Generic RX handler implementations
2944  *
2945  ******************************************************************************/
2946 #ifdef CONFIG_IWL4965_HT
2947
2948 static inline int iwl4965_get_ra_sta_id(struct iwl_priv *priv,
2949                                     struct ieee80211_hdr *hdr)
2950 {
2951         if (priv->iw_mode == IEEE80211_IF_TYPE_STA)
2952                 return IWL_AP_ID;
2953         else {
2954                 u8 *da = ieee80211_get_DA(hdr);
2955                 return iwl4965_hw_find_station(priv, da);
2956         }
2957 }
2958
2959 static struct ieee80211_hdr *iwl4965_tx_queue_get_hdr(
2960         struct iwl_priv *priv, int txq_id, int idx)
2961 {
2962         if (priv->txq[txq_id].txb[idx].skb[0])
2963                 return (struct ieee80211_hdr *)priv->txq[txq_id].
2964                                 txb[idx].skb[0]->data;
2965         return NULL;
2966 }
2967
2968 static inline u32 iwl4965_get_scd_ssn(struct iwl4965_tx_resp *tx_resp)
2969 {
2970         __le32 *scd_ssn = (__le32 *)((u32 *)&tx_resp->status +
2971                                 tx_resp->frame_count);
2972         return le32_to_cpu(*scd_ssn) & MAX_SN;
2973
2974 }
2975
2976 /**
2977  * iwl4965_tx_status_reply_tx - Handle Tx rspnse for frames in aggregation queue
2978  */
2979 static int iwl4965_tx_status_reply_tx(struct iwl_priv *priv,
2980                                       struct iwl4965_ht_agg *agg,
2981                                       struct iwl4965_tx_resp_agg *tx_resp,
2982                                       u16 start_idx)
2983 {
2984         u16 status;
2985         struct agg_tx_status *frame_status = &tx_resp->status;
2986         struct ieee80211_tx_status *tx_status = NULL;
2987         struct ieee80211_hdr *hdr = NULL;
2988         int i, sh;
2989         int txq_id, idx;
2990         u16 seq;
2991
2992         if (agg->wait_for_ba)
2993                 IWL_DEBUG_TX_REPLY("got tx response w/o block-ack\n");
2994
2995         agg->frame_count = tx_resp->frame_count;
2996         agg->start_idx = start_idx;
2997         agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
2998         agg->bitmap = 0;
2999
3000         /* # frames attempted by Tx command */
3001         if (agg->frame_count == 1) {
3002                 /* Only one frame was attempted; no block-ack will arrive */
3003                 status = le16_to_cpu(frame_status[0].status);
3004                 seq  = le16_to_cpu(frame_status[0].sequence);
3005                 idx = SEQ_TO_INDEX(seq);
3006                 txq_id = SEQ_TO_QUEUE(seq);
3007
3008                 /* FIXME: code repetition */
3009                 IWL_DEBUG_TX_REPLY("FrameCnt = %d, StartIdx=%d idx=%d\n",
3010                                    agg->frame_count, agg->start_idx, idx);
3011
3012                 tx_status = &(priv->txq[txq_id].txb[idx].status);
3013                 tx_status->retry_count = tx_resp->failure_frame;
3014                 tx_status->queue_number = status & 0xff;
3015                 tx_status->queue_length = tx_resp->failure_rts;
3016                 tx_status->control.flags &= ~IEEE80211_TXCTL_AMPDU;
3017                 tx_status->flags = iwl4965_is_tx_success(status)?
3018                         IEEE80211_TX_STATUS_ACK : 0;
3019                 iwl4965_hwrate_to_tx_control(priv,
3020                                              le32_to_cpu(tx_resp->rate_n_flags),
3021                                              &tx_status->control);
3022                 /* FIXME: code repetition end */
3023
3024                 IWL_DEBUG_TX_REPLY("1 Frame 0x%x failure :%d\n",
3025                                     status & 0xff, tx_resp->failure_frame);
3026                 IWL_DEBUG_TX_REPLY("Rate Info rate_n_flags=%x\n",
3027                                 iwl4965_hw_get_rate_n_flags(tx_resp->rate_n_flags));
3028
3029                 agg->wait_for_ba = 0;
3030         } else {
3031                 /* Two or more frames were attempted; expect block-ack */
3032                 u64 bitmap = 0;
3033                 int start = agg->start_idx;
3034
3035                 /* Construct bit-map of pending frames within Tx window */
3036                 for (i = 0; i < agg->frame_count; i++) {
3037                         u16 sc;
3038                         status = le16_to_cpu(frame_status[i].status);
3039                         seq  = le16_to_cpu(frame_status[i].sequence);
3040                         idx = SEQ_TO_INDEX(seq);
3041                         txq_id = SEQ_TO_QUEUE(seq);
3042
3043                         if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
3044                                       AGG_TX_STATE_ABORT_MSK))
3045                                 continue;
3046
3047                         IWL_DEBUG_TX_REPLY("FrameCnt = %d, txq_id=%d idx=%d\n",
3048                                            agg->frame_count, txq_id, idx);
3049
3050                         hdr = iwl4965_tx_queue_get_hdr(priv, txq_id, idx);
3051
3052                         sc = le16_to_cpu(hdr->seq_ctrl);
3053                         if (idx != (SEQ_TO_SN(sc) & 0xff)) {
3054                                 IWL_ERROR("BUG_ON idx doesn't match seq control"
3055                                           " idx=%d, seq_idx=%d, seq=%d\n",
3056                                           idx, SEQ_TO_SN(sc),
3057                                           hdr->seq_ctrl);
3058                                 return -1;
3059                         }
3060
3061                         IWL_DEBUG_TX_REPLY("AGG Frame i=%d idx %d seq=%d\n",
3062                                            i, idx, SEQ_TO_SN(sc));
3063
3064                         sh = idx - start;
3065                         if (sh > 64) {
3066                                 sh = (start - idx) + 0xff;
3067                                 bitmap = bitmap << sh;
3068                                 sh = 0;
3069                                 start = idx;
3070                         } else if (sh < -64)
3071                                 sh  = 0xff - (start - idx);
3072                         else if (sh < 0) {
3073                                 sh = start - idx;
3074                                 start = idx;
3075                                 bitmap = bitmap << sh;
3076                                 sh = 0;
3077                         }
3078                         bitmap |= (1 << sh);
3079                         IWL_DEBUG_TX_REPLY("start=%d bitmap=0x%x\n",
3080                                            start, (u32)(bitmap & 0xFFFFFFFF));
3081                 }
3082
3083                 agg->bitmap = bitmap;
3084                 agg->start_idx = start;
3085                 agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
3086                 IWL_DEBUG_TX_REPLY("Frames %d start_idx=%d bitmap=0x%llx\n",
3087                                    agg->frame_count, agg->start_idx,
3088                                    (unsigned long long)agg->bitmap);
3089
3090                 if (bitmap)
3091                         agg->wait_for_ba = 1;
3092         }
3093         return 0;
3094 }
3095 #endif
3096
3097 /**
3098  * iwl4965_rx_reply_tx - Handle standard (non-aggregation) Tx response
3099  */
3100 static void iwl4965_rx_reply_tx(struct iwl_priv *priv,
3101                             struct iwl4965_rx_mem_buffer *rxb)
3102 {
3103         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3104         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3105         int txq_id = SEQ_TO_QUEUE(sequence);
3106         int index = SEQ_TO_INDEX(sequence);
3107         struct iwl4965_tx_queue *txq = &priv->txq[txq_id];
3108         struct ieee80211_tx_status *tx_status;
3109         struct iwl4965_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
3110         u32  status = le32_to_cpu(tx_resp->status);
3111 #ifdef CONFIG_IWL4965_HT
3112         int tid = MAX_TID_COUNT, sta_id = IWL_INVALID_STATION;
3113         struct ieee80211_hdr *hdr;
3114         __le16 *qc;
3115 #endif
3116
3117         if ((index >= txq->q.n_bd) || (x2_queue_used(&txq->q, index) == 0)) {
3118                 IWL_ERROR("Read index for DMA queue txq_id (%d) index %d "
3119                           "is out of range [0-%d] %d %d\n", txq_id,
3120                           index, txq->q.n_bd, txq->q.write_ptr,
3121                           txq->q.read_ptr);
3122                 return;
3123         }
3124
3125 #ifdef CONFIG_IWL4965_HT
3126         hdr = iwl4965_tx_queue_get_hdr(priv, txq_id, index);
3127         qc = ieee80211_get_qos_ctrl(hdr);
3128
3129         if (qc)
3130                 tid = le16_to_cpu(*qc) & 0xf;
3131
3132         sta_id = iwl4965_get_ra_sta_id(priv, hdr);
3133         if (txq->sched_retry && unlikely(sta_id == IWL_INVALID_STATION)) {
3134                 IWL_ERROR("Station not known\n");
3135                 return;
3136         }
3137
3138         if (txq->sched_retry) {
3139                 const u32 scd_ssn = iwl4965_get_scd_ssn(tx_resp);
3140                 struct iwl4965_ht_agg *agg = NULL;
3141
3142                 if (!qc)
3143                         return;
3144
3145                 agg = &priv->stations[sta_id].tid[tid].agg;
3146
3147                 iwl4965_tx_status_reply_tx(priv, agg,
3148                                 (struct iwl4965_tx_resp_agg *)tx_resp, index);
3149
3150                 if ((tx_resp->frame_count == 1) &&
3151                     !iwl4965_is_tx_success(status)) {
3152                         /* TODO: send BAR */
3153                 }
3154
3155                 if (txq->q.read_ptr != (scd_ssn & 0xff)) {
3156                         int freed;
3157                         index = iwl_queue_dec_wrap(scd_ssn & 0xff, txq->q.n_bd);
3158                         IWL_DEBUG_TX_REPLY("Retry scheduler reclaim scd_ssn "
3159                                            "%d index %d\n", scd_ssn , index);
3160                         freed = iwl4965_tx_queue_reclaim(priv, txq_id, index);
3161                         priv->stations[sta_id].tid[tid].tfds_in_queue -= freed;
3162
3163                         if (iwl4965_queue_space(&txq->q) > txq->q.low_mark &&
3164                             txq_id >= 0 && priv->mac80211_registered &&
3165                             agg->state != IWL_EMPTYING_HW_QUEUE_DELBA)
3166                                 ieee80211_wake_queue(priv->hw, txq_id);
3167
3168                         iwl4965_check_empty_hw_queue(priv, sta_id, tid, txq_id);
3169                 }
3170         } else {
3171 #endif /* CONFIG_IWL4965_HT */
3172         tx_status = &(txq->txb[txq->q.read_ptr].status);
3173
3174         tx_status->retry_count = tx_resp->failure_frame;
3175         tx_status->queue_number = status;
3176         tx_status->queue_length = tx_resp->bt_kill_count;
3177         tx_status->queue_length |= tx_resp->failure_rts;
3178         tx_status->flags =
3179             iwl4965_is_tx_success(status) ? IEEE80211_TX_STATUS_ACK : 0;
3180         iwl4965_hwrate_to_tx_control(priv, le32_to_cpu(tx_resp->rate_n_flags),
3181                                      &tx_status->control);
3182
3183         IWL_DEBUG_TX("Tx queue %d Status %s (0x%08x) rate_n_flags 0x%x "
3184                      "retries %d\n", txq_id, iwl4965_get_tx_fail_reason(status),
3185                      status, le32_to_cpu(tx_resp->rate_n_flags),
3186                      tx_resp->failure_frame);
3187
3188         IWL_DEBUG_TX_REPLY("Tx queue reclaim %d\n", index);
3189         if (index != -1) {
3190                 int freed = iwl4965_tx_queue_reclaim(priv, txq_id, index);
3191 #ifdef CONFIG_IWL4965_HT
3192                 if (tid != MAX_TID_COUNT)
3193                         priv->stations[sta_id].tid[tid].tfds_in_queue -= freed;
3194                 if (iwl4965_queue_space(&txq->q) > txq->q.low_mark &&
3195                         (txq_id >= 0) &&
3196                         priv->mac80211_registered)
3197                         ieee80211_wake_queue(priv->hw, txq_id);
3198                 if (tid != MAX_TID_COUNT)
3199                         iwl4965_check_empty_hw_queue(priv, sta_id, tid, txq_id);
3200 #endif
3201         }
3202 #ifdef CONFIG_IWL4965_HT
3203         }
3204 #endif /* CONFIG_IWL4965_HT */
3205
3206         if (iwl_check_bits(status, TX_ABORT_REQUIRED_MSK))
3207                 IWL_ERROR("TODO:  Implement Tx ABORT REQUIRED!!!\n");
3208 }
3209
3210
3211 static void iwl4965_rx_reply_alive(struct iwl_priv *priv,
3212                                struct iwl4965_rx_mem_buffer *rxb)
3213 {
3214         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3215         struct iwl4965_alive_resp *palive;
3216         struct delayed_work *pwork;
3217
3218         palive = &pkt->u.alive_frame;
3219
3220         IWL_DEBUG_INFO("Alive ucode status 0x%08X revision "
3221                        "0x%01X 0x%01X\n",
3222                        palive->is_valid, palive->ver_type,
3223                        palive->ver_subtype);
3224
3225         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
3226                 IWL_DEBUG_INFO("Initialization Alive received.\n");
3227                 memcpy(&priv->card_alive_init,
3228                        &pkt->u.alive_frame,
3229                        sizeof(struct iwl4965_init_alive_resp));
3230                 pwork = &priv->init_alive_start;
3231         } else {
3232                 IWL_DEBUG_INFO("Runtime Alive received.\n");
3233                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
3234                        sizeof(struct iwl4965_alive_resp));
3235                 pwork = &priv->alive_start;
3236         }
3237
3238         /* We delay the ALIVE response by 5ms to
3239          * give the HW RF Kill time to activate... */
3240         if (palive->is_valid == UCODE_VALID_OK)
3241                 queue_delayed_work(priv->workqueue, pwork,
3242                                    msecs_to_jiffies(5));
3243         else
3244                 IWL_WARNING("uCode did not respond OK.\n");
3245 }
3246
3247 static void iwl4965_rx_reply_add_sta(struct iwl_priv *priv,
3248                                  struct iwl4965_rx_mem_buffer *rxb)
3249 {
3250         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3251
3252         IWL_DEBUG_RX("Received REPLY_ADD_STA: 0x%02X\n", pkt->u.status);
3253         return;
3254 }
3255
3256 static void iwl4965_rx_reply_error(struct iwl_priv *priv,
3257                                struct iwl4965_rx_mem_buffer *rxb)
3258 {
3259         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3260
3261         IWL_ERROR("Error Reply type 0x%08X cmd %s (0x%02X) "
3262                 "seq 0x%04X ser 0x%08X\n",
3263                 le32_to_cpu(pkt->u.err_resp.error_type),
3264                 get_cmd_string(pkt->u.err_resp.cmd_id),
3265                 pkt->u.err_resp.cmd_id,
3266                 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
3267                 le32_to_cpu(pkt->u.err_resp.error_info));
3268 }
3269
3270 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
3271
3272 static void iwl4965_rx_csa(struct iwl_priv *priv, struct iwl4965_rx_mem_buffer *rxb)
3273 {
3274         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3275         struct iwl4965_rxon_cmd *rxon = (void *)&priv->active_rxon;
3276         struct iwl4965_csa_notification *csa = &(pkt->u.csa_notif);
3277         IWL_DEBUG_11H("CSA notif: channel %d, status %d\n",
3278                       le16_to_cpu(csa->channel), le32_to_cpu(csa->status));
3279         rxon->channel = csa->channel;
3280         priv->staging_rxon.channel = csa->channel;
3281 }
3282
3283 static void iwl4965_rx_spectrum_measure_notif(struct iwl_priv *priv,
3284                                           struct iwl4965_rx_mem_buffer *rxb)
3285 {
3286 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
3287         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3288         struct iwl4965_spectrum_notification *report = &(pkt->u.spectrum_notif);
3289
3290         if (!report->state) {
3291                 IWL_DEBUG(IWL_DL_11H | IWL_DL_INFO,
3292                           "Spectrum Measure Notification: Start\n");
3293                 return;
3294         }
3295
3296         memcpy(&priv->measure_report, report, sizeof(*report));
3297         priv->measurement_status |= MEASUREMENT_READY;
3298 #endif
3299 }
3300
3301 static void iwl4965_rx_pm_sleep_notif(struct iwl_priv *priv,
3302                                   struct iwl4965_rx_mem_buffer *rxb)
3303 {
3304 #ifdef CONFIG_IWLWIFI_DEBUG
3305         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3306         struct iwl4965_sleep_notification *sleep = &(pkt->u.sleep_notif);
3307         IWL_DEBUG_RX("sleep mode: %d, src: %d\n",
3308                      sleep->pm_sleep_mode, sleep->pm_wakeup_src);
3309 #endif
3310 }
3311
3312 static void iwl4965_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
3313                                              struct iwl4965_rx_mem_buffer *rxb)
3314 {
3315         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3316         IWL_DEBUG_RADIO("Dumping %d bytes of unhandled "
3317                         "notification for %s:\n",
3318                         le32_to_cpu(pkt->len), get_cmd_string(pkt->hdr.cmd));
3319         iwl_print_hex_dump(IWL_DL_RADIO, pkt->u.raw, le32_to_cpu(pkt->len));
3320 }
3321
3322 static void iwl4965_bg_beacon_update(struct work_struct *work)
3323 {
3324         struct iwl_priv *priv =
3325                 container_of(work, struct iwl_priv, beacon_update);
3326         struct sk_buff *beacon;
3327
3328         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
3329         beacon = ieee80211_beacon_get(priv->hw, priv->vif, NULL);
3330
3331         if (!beacon) {
3332                 IWL_ERROR("update beacon failed\n");
3333                 return;
3334         }
3335
3336         mutex_lock(&priv->mutex);
3337         /* new beacon skb is allocated every time; dispose previous.*/
3338         if (priv->ibss_beacon)
3339                 dev_kfree_skb(priv->ibss_beacon);
3340
3341         priv->ibss_beacon = beacon;
3342         mutex_unlock(&priv->mutex);
3343
3344         iwl4965_send_beacon_cmd(priv);
3345 }
3346
3347 static void iwl4965_rx_beacon_notif(struct iwl_priv *priv,
3348                                 struct iwl4965_rx_mem_buffer *rxb)
3349 {
3350 #ifdef CONFIG_IWLWIFI_DEBUG
3351         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3352         struct iwl4965_beacon_notif *beacon = &(pkt->u.beacon_status);
3353         u8 rate = iwl4965_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
3354
3355         IWL_DEBUG_RX("beacon status %x retries %d iss %d "
3356                 "tsf %d %d rate %d\n",
3357                 le32_to_cpu(beacon->beacon_notify_hdr.status) & TX_STATUS_MSK,
3358                 beacon->beacon_notify_hdr.failure_frame,
3359                 le32_to_cpu(beacon->ibss_mgr_status),
3360                 le32_to_cpu(beacon->high_tsf),
3361                 le32_to_cpu(beacon->low_tsf), rate);
3362 #endif
3363
3364         if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
3365             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
3366                 queue_work(priv->workqueue, &priv->beacon_update);
3367 }
3368
3369 /* Service response to REPLY_SCAN_CMD (0x80) */
3370 static void iwl4965_rx_reply_scan(struct iwl_priv *priv,
3371                               struct iwl4965_rx_mem_buffer *rxb)
3372 {
3373 #ifdef CONFIG_IWLWIFI_DEBUG
3374         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3375         struct iwl4965_scanreq_notification *notif =
3376             (struct iwl4965_scanreq_notification *)pkt->u.raw;
3377
3378         IWL_DEBUG_RX("Scan request status = 0x%x\n", notif->status);
3379 #endif
3380 }
3381
3382 /* Service SCAN_START_NOTIFICATION (0x82) */
3383 static void iwl4965_rx_scan_start_notif(struct iwl_priv *priv,
3384                                     struct iwl4965_rx_mem_buffer *rxb)
3385 {
3386         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3387         struct iwl4965_scanstart_notification *notif =
3388             (struct iwl4965_scanstart_notification *)pkt->u.raw;
3389         priv->scan_start_tsf = le32_to_cpu(notif->tsf_low);
3390         IWL_DEBUG_SCAN("Scan start: "
3391                        "%d [802.11%s] "
3392                        "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n",
3393                        notif->channel,
3394                        notif->band ? "bg" : "a",
3395                        notif->tsf_high,
3396                        notif->tsf_low, notif->status, notif->beacon_timer);
3397 }
3398
3399 /* Service SCAN_RESULTS_NOTIFICATION (0x83) */
3400 static void iwl4965_rx_scan_results_notif(struct iwl_priv *priv,
3401                                       struct iwl4965_rx_mem_buffer *rxb)
3402 {
3403         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3404         struct iwl4965_scanresults_notification *notif =
3405             (struct iwl4965_scanresults_notification *)pkt->u.raw;
3406
3407         IWL_DEBUG_SCAN("Scan ch.res: "
3408                        "%d [802.11%s] "
3409                        "(TSF: 0x%08X:%08X) - %d "
3410                        "elapsed=%lu usec (%dms since last)\n",
3411                        notif->channel,
3412                        notif->band ? "bg" : "a",
3413                        le32_to_cpu(notif->tsf_high),
3414                        le32_to_cpu(notif->tsf_low),
3415                        le32_to_cpu(notif->statistics[0]),
3416                        le32_to_cpu(notif->tsf_low) - priv->scan_start_tsf,
3417                        jiffies_to_msecs(elapsed_jiffies
3418                                         (priv->last_scan_jiffies, jiffies)));
3419
3420         priv->last_scan_jiffies = jiffies;
3421         priv->next_scan_jiffies = 0;
3422 }
3423
3424 /* Service SCAN_COMPLETE_NOTIFICATION (0x84) */
3425 static void iwl4965_rx_scan_complete_notif(struct iwl_priv *priv,
3426                                        struct iwl4965_rx_mem_buffer *rxb)
3427 {
3428         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3429         struct iwl4965_scancomplete_notification *scan_notif = (void *)pkt->u.raw;
3430
3431         IWL_DEBUG_SCAN("Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n",
3432                        scan_notif->scanned_channels,
3433                        scan_notif->tsf_low,
3434                        scan_notif->tsf_high, scan_notif->status);
3435
3436         /* The HW is no longer scanning */
3437         clear_bit(STATUS_SCAN_HW, &priv->status);
3438
3439         /* The scan completion notification came in, so kill that timer... */
3440         cancel_delayed_work(&priv->scan_check);
3441
3442         IWL_DEBUG_INFO("Scan pass on %sGHz took %dms\n",
3443                        (priv->scan_bands == 2) ? "2.4" : "5.2",
3444                        jiffies_to_msecs(elapsed_jiffies
3445                                         (priv->scan_pass_start, jiffies)));
3446
3447         /* Remove this scanned band from the list
3448          * of pending bands to scan */
3449         priv->scan_bands--;
3450
3451         /* If a request to abort was given, or the scan did not succeed
3452          * then we reset the scan state machine and terminate,
3453          * re-queuing another scan if one has been requested */
3454         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
3455                 IWL_DEBUG_INFO("Aborted scan completed.\n");
3456                 clear_bit(STATUS_SCAN_ABORTING, &priv->status);
3457         } else {
3458                 /* If there are more bands on this scan pass reschedule */
3459                 if (priv->scan_bands > 0)
3460                         goto reschedule;
3461         }
3462
3463         priv->last_scan_jiffies = jiffies;
3464         priv->next_scan_jiffies = 0;
3465         IWL_DEBUG_INFO("Setting scan to off\n");
3466
3467         clear_bit(STATUS_SCANNING, &priv->status);
3468
3469         IWL_DEBUG_INFO("Scan took %dms\n",
3470                 jiffies_to_msecs(elapsed_jiffies(priv->scan_start, jiffies)));
3471
3472         queue_work(priv->workqueue, &priv->scan_completed);
3473
3474         return;
3475
3476 reschedule:
3477         priv->scan_pass_start = jiffies;
3478         queue_work(priv->workqueue, &priv->request_scan);
3479 }
3480
3481 /* Handle notification from uCode that card's power state is changing
3482  * due to software, hardware, or critical temperature RFKILL */
3483 static void iwl4965_rx_card_state_notif(struct iwl_priv *priv,
3484                                     struct iwl4965_rx_mem_buffer *rxb)
3485 {
3486         struct iwl4965_rx_packet *pkt = (void *)rxb->skb->data;
3487         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
3488         unsigned long status = priv->status;
3489
3490         IWL_DEBUG_RF_KILL("Card state received: HW:%s SW:%s\n",
3491                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
3492                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
3493
3494         if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED |
3495                      RF_CARD_DISABLED)) {
3496
3497                 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
3498                             CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
3499
3500                 if (!iwl_grab_nic_access(priv)) {
3501                         iwl_write_direct32(
3502                                 priv, HBUS_TARG_MBX_C,
3503                                 HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
3504
3505                         iwl_release_nic_access(priv);
3506                 }
3507
3508                 if (!(flags & RXON_CARD_DISABLED)) {
3509                         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
3510                                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
3511                         if (!iwl_grab_nic_access(priv)) {
3512                                 iwl_write_direct32(
3513                                         priv, HBUS_TARG_MBX_C,
3514                                         HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
3515
3516                                 iwl_release_nic_access(priv);
3517                         }
3518                 }
3519
3520                 if (flags & RF_CARD_DISABLED) {
3521                         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
3522                                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
3523                         iwl_read32(priv, CSR_UCODE_DRV_GP1);
3524                         if (!iwl_grab_nic_access(priv))
3525                                 iwl_release_nic_access(priv);
3526                 }
3527         }
3528
3529         if (flags & HW_CARD_DISABLED)
3530                 set_bit(STATUS_RF_KILL_HW, &priv->status);
3531         else
3532                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
3533
3534
3535         if (flags & SW_CARD_DISABLED)
3536                 set_bit(STATUS_RF_KILL_SW, &priv->status);
3537         else
3538                 clear_bit(STATUS_RF_KILL_SW, &priv->status);
3539
3540         if (!(flags & RXON_CARD_DISABLED))
3541                 iwl4965_scan_cancel(priv);
3542
3543         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
3544              test_bit(STATUS_RF_KILL_HW, &priv->status)) ||
3545             (test_bit(STATUS_RF_KILL_SW, &status) !=
3546              test_bit(STATUS_RF_KILL_SW, &priv->status)))
3547                 queue_work(priv->workqueue, &priv->rf_kill);
3548         else
3549                 wake_up_interruptible(&priv->wait_command_queue);
3550 }
3551
3552 /**
3553  * iwl4965_setup_rx_handlers - Initialize Rx handler callbacks
3554  *
3555  * Setup the RX handlers for each of the reply types sent from the uCode
3556  * to the host.
3557  *
3558  * This function chains into the hardware specific files for them to setup
3559  * any hardware specific handlers as well.
3560  */
3561 static void iwl4965_setup_rx_handlers(struct iwl_priv *priv)
3562 {
3563         priv->rx_handlers[REPLY_ALIVE] = iwl4965_rx_reply_alive;
3564         priv->rx_handlers[REPLY_ADD_STA] = iwl4965_rx_reply_add_sta;
3565         priv->rx_handlers[REPLY_ERROR] = iwl4965_rx_reply_error;
3566         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl4965_rx_csa;
3567         priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
3568             iwl4965_rx_spectrum_measure_notif;
3569         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl4965_rx_pm_sleep_notif;
3570         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
3571             iwl4965_rx_pm_debug_statistics_notif;
3572         priv->rx_handlers[BEACON_NOTIFICATION] = iwl4965_rx_beacon_notif;
3573
3574         /*
3575          * The same handler is used for both the REPLY to a discrete
3576          * statistics request from the host as well as for the periodic
3577          * statistics notifications (after received beacons) from the uCode.
3578          */
3579         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl4965_hw_rx_statistics;
3580         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl4965_hw_rx_statistics;
3581
3582         priv->rx_handlers[REPLY_SCAN_CMD] = iwl4965_rx_reply_scan;
3583         priv->rx_handlers[SCAN_START_NOTIFICATION] = iwl4965_rx_scan_start_notif;
3584         priv->rx_handlers[SCAN_RESULTS_NOTIFICATION] =
3585             iwl4965_rx_scan_results_notif;
3586         priv->rx_handlers[SCAN_COMPLETE_NOTIFICATION] =
3587             iwl4965_rx_scan_complete_notif;
3588         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl4965_rx_card_state_notif;
3589         priv->rx_handlers[REPLY_TX] = iwl4965_rx_reply_tx;
3590
3591         /* Set up hardware specific Rx handlers */
3592         iwl4965_hw_rx_handler_setup(priv);
3593 }
3594
3595 /**
3596  * iwl4965_tx_cmd_complete - Pull unused buffers off the queue and reclaim them
3597  * @rxb: Rx buffer to reclaim
3598  *
3599  * If an Rx buffer has an async callback associated with it the callback
3600  * will be executed.  The attached skb (if present) will only be freed
3601  * if the callback returns 1
3602  */
3603 static void iwl4965_tx_cmd_complete(struct iwl_priv *priv,
3604                                 struct iwl4965_rx_mem_buffer *rxb)
3605 {
3606         struct iwl4965_rx_packet *pkt = (struct iwl4965_rx_packet *)rxb->skb->data;
3607         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3608         int txq_id = SEQ_TO_QUEUE(sequence);
3609         int index = SEQ_TO_INDEX(sequence);
3610         int huge = sequence & SEQ_HUGE_FRAME;
3611         int cmd_index;
3612         struct iwl_cmd *cmd;
3613
3614         /* If a Tx command is being handled and it isn't in the actual
3615          * command queue then there a command routing bug has been introduced
3616          * in the queue management code. */
3617         if (txq_id != IWL_CMD_QUEUE_NUM)
3618                 IWL_ERROR("Error wrong command queue %d command id 0x%X\n",
3619                           txq_id, pkt->hdr.cmd);
3620         BUG_ON(txq_id != IWL_CMD_QUEUE_NUM);
3621
3622         cmd_index = get_cmd_index(&priv->txq[IWL_CMD_QUEUE_NUM].q, index, huge);
3623         cmd = &priv->txq[IWL_CMD_QUEUE_NUM].cmd[cmd_index];
3624
3625         /* Input error checking is done when commands are added to queue. */
3626         if (cmd->meta.flags & CMD_WANT_SKB) {
3627                 cmd->meta.source->u.skb = rxb->skb;
3628                 rxb->skb = NULL;
3629         } else if (cmd->meta.u.callback &&
3630                    !cmd->meta.u.callback(priv, cmd, rxb->skb))
3631                 rxb->skb = NULL;
3632
3633         iwl4965_tx_queue_reclaim(priv, txq_id, index);
3634
3635         if (!(cmd->meta.flags & CMD_ASYNC)) {
3636                 clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
3637                 wake_up_interruptible(&priv->wait_command_queue);
3638         }
3639 }
3640
3641 /************************** RX-FUNCTIONS ****************************/
3642 /*
3643  * Rx theory of operation
3644  *
3645  * Driver allocates a circular buffer of Receive Buffer Descriptors (RBDs),
3646  * each of which point to Receive Buffers to be filled by 4965.  These get
3647  * used not only for Rx frames, but for any command response or notification
3648  * from the 4965.  The driver and 4965 manage the Rx buffers by means
3649  * of indexes into the circular buffer.
3650  *
3651  * Rx Queue Indexes
3652  * The host/firmware share two index registers for managing the Rx buffers.
3653  *
3654  * The READ index maps to the first position that the firmware may be writing
3655  * to -- the driver can read up to (but not including) this position and get
3656  * good data.
3657  * The READ index is managed by the firmware once the card is enabled.
3658  *
3659  * The WRITE index maps to the last position the driver has read from -- the
3660  * position preceding WRITE is the last slot the firmware can place a packet.
3661  *
3662  * The queue is empty (no good data) if WRITE = READ - 1, and is full if
3663  * WRITE = READ.
3664  *
3665  * During initialization, the host sets up the READ queue position to the first
3666  * INDEX position, and WRITE to the last (READ - 1 wrapped)
3667  *
3668  * When the firmware places a packet in a buffer, it will advance the READ index
3669  * and fire the RX interrupt.  The driver can then query the READ index and
3670  * process as many packets as possible, moving the WRITE index forward as it
3671  * resets the Rx queue buffers with new memory.
3672  *
3673  * The management in the driver is as follows:
3674  * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
3675  *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
3676  *   to replenish the iwl->rxq->rx_free.
3677  * + In iwl4965_rx_replenish (scheduled) if 'processed' != 'read' then the
3678  *   iwl->rxq is replenished and the READ INDEX is updated (updating the
3679  *   'processed' and 'read' driver indexes as well)
3680  * + A received packet is processed and handed to the kernel network stack,
3681  *   detached from the iwl->rxq.  The driver 'processed' index is updated.
3682  * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
3683  *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
3684  *   INDEX is not incremented and iwl->status(RX_STALLED) is set.  If there
3685  *   were enough free buffers and RX_STALLED is set it is cleared.
3686  *
3687  *
3688  * Driver sequence:
3689  *
3690  * iwl4965_rx_queue_alloc()   Allocates rx_free
3691  * iwl4965_rx_replenish()     Replenishes rx_free list from rx_used, and calls
3692  *                            iwl4965_rx_queue_restock
3693  * iwl4965_rx_queue_restock() Moves available buffers from rx_free into Rx
3694  *                            queue, updates firmware pointers, and updates
3695  *                            the WRITE index.  If insufficient rx_free buffers
3696  *                            are available, schedules iwl4965_rx_replenish
3697  *
3698  * -- enable interrupts --
3699  * ISR - iwl4965_rx()         Detach iwl4965_rx_mem_buffers from pool up to the
3700  *                            READ INDEX, detaching the SKB from the pool.
3701  *                            Moves the packet buffer from queue to rx_used.
3702  *                            Calls iwl4965_rx_queue_restock to refill any empty
3703  *                            slots.
3704  * ...
3705  *
3706  */
3707
3708 /**
3709  * iwl4965_rx_queue_space - Return number of free slots available in queue.
3710  */
3711 static int iwl4965_rx_queue_space(const struct iwl4965_rx_queue *q)
3712 {
3713         int s = q->read - q->write;
3714         if (s <= 0)
3715                 s += RX_QUEUE_SIZE;
3716         /* keep some buffer to not confuse full and empty queue */
3717         s -= 2;
3718         if (s < 0)
3719                 s = 0;
3720         return s;
3721 }
3722
3723 /**
3724  * iwl4965_rx_queue_update_write_ptr - Update the write pointer for the RX queue
3725  */
3726 int iwl4965_rx_queue_update_write_ptr(struct iwl_priv *priv, struct iwl4965_rx_queue *q)
3727 {
3728         u32 reg = 0;
3729         int rc = 0;
3730         unsigned long flags;
3731
3732         spin_lock_irqsave(&q->lock, flags);
3733
3734         if (q->need_update == 0)
3735                 goto exit_unlock;
3736
3737         /* If power-saving is in use, make sure device is awake */
3738         if (test_bit(STATUS_POWER_PMI, &priv->status)) {
3739                 reg = iwl_read32(priv, CSR_UCODE_DRV_GP1);
3740
3741                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
3742                         iwl_set_bit(priv, CSR_GP_CNTRL,
3743                                     CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
3744                         goto exit_unlock;
3745                 }
3746
3747                 rc = iwl_grab_nic_access(priv);
3748                 if (rc)
3749                         goto exit_unlock;
3750
3751                 /* Device expects a multiple of 8 */
3752                 iwl_write_direct32(priv, FH_RSCSR_CHNL0_WPTR,
3753                                      q->write & ~0x7);
3754                 iwl_release_nic_access(priv);
3755
3756         /* Else device is assumed to be awake */
3757         } else
3758                 /* Device expects a multiple of 8 */
3759                 iwl_write32(priv, FH_RSCSR_CHNL0_WPTR, q->write & ~0x7);
3760
3761
3762         q->need_update = 0;
3763
3764  exit_unlock:
3765         spin_unlock_irqrestore(&q->lock, flags);
3766         return rc;
3767 }
3768
3769 /**
3770  * iwl4965_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
3771  */
3772 static inline __le32 iwl4965_dma_addr2rbd_ptr(struct iwl_priv *priv,
3773                                           dma_addr_t dma_addr)
3774 {
3775         return cpu_to_le32((u32)(dma_addr >> 8));
3776 }
3777
3778
3779 /**
3780  * iwl4965_rx_queue_restock - refill RX queue from pre-allocated pool
3781  *
3782  * If there are slots in the RX queue that need to be restocked,
3783  * and we have free pre-allocated buffers, fill the ranks as much
3784  * as we can, pulling from rx_free.
3785  *
3786  * This moves the 'write' index forward to catch up with 'processed', and
3787  * also updates the memory address in the firmware to reference the new
3788  * target buffer.
3789  */
3790 static int iwl4965_rx_queue_restock(struct iwl_priv *priv)
3791 {
3792         struct iwl4965_rx_queue *rxq = &priv->rxq;
3793         struct list_head *element;
3794         struct iwl4965_rx_mem_buffer *rxb;
3795         unsigned long flags;
3796         int write, rc;
3797
3798         spin_lock_irqsave(&rxq->lock, flags);
3799         write = rxq->write & ~0x7;
3800         while ((iwl4965_rx_queue_space(rxq) > 0) && (rxq->free_count)) {
3801                 /* Get next free Rx buffer, remove from free list */
3802                 element = rxq->rx_free.next;
3803                 rxb = list_entry(element, struct iwl4965_rx_mem_buffer, list);
3804                 list_del(element);
3805
3806                 /* Point to Rx buffer via next RBD in circular buffer */
3807                 rxq->bd[rxq->write] = iwl4965_dma_addr2rbd_ptr(priv, rxb->dma_addr);
3808                 rxq->queue[rxq->write] = rxb;
3809                 rxq->write = (rxq->write + 1) & RX_QUEUE_MASK;
3810                 rxq->free_count--;
3811         }
3812         spin_unlock_irqrestore(&rxq->lock, flags);
3813         /* If the pre-allocated buffer pool is dropping low, schedule to
3814          * refill it */
3815         if (rxq->free_count <= RX_LOW_WATERMARK)
3816                 queue_work(priv->workqueue, &priv->rx_replenish);
3817
3818
3819         /* If we've added more space for the firmware to place data, tell it.
3820          * Increment device's write pointer in multiples of 8. */
3821         if ((write != (rxq->write & ~0x7))
3822             || (abs(rxq->write - rxq->read) > 7)) {
3823                 spin_lock_irqsave(&rxq->lock, flags);
3824                 rxq->need_update = 1;
3825                 spin_unlock_irqrestore(&rxq->lock, flags);
3826                 rc = iwl4965_rx_queue_update_write_ptr(priv, rxq);
3827                 if (rc)
3828                         return rc;
3829         }
3830
3831         return 0;
3832 }
3833
3834 /**
3835  * iwl4965_rx_replenish - Move all used packet from rx_used to rx_free
3836  *
3837  * When moving to rx_free an SKB is allocated for the slot.
3838  *
3839  * Also restock the Rx queue via iwl4965_rx_queue_restock.
3840  * This is called as a scheduled work item (except for during initialization)
3841  */
3842 static void iwl4965_rx_allocate(struct iwl_priv *priv)
3843 {
3844         struct iwl4965_rx_queue *rxq = &priv->rxq;
3845         struct list_head *element;
3846         struct iwl4965_rx_mem_buffer *rxb;
3847         unsigned long flags;
3848         spin_lock_irqsave(&rxq->lock, flags);
3849         while (!list_empty(&rxq->rx_used)) {
3850                 element = rxq->rx_used.next;
3851                 rxb = list_entry(element, struct iwl4965_rx_mem_buffer, list);
3852
3853                 /* Alloc a new receive buffer */
3854                 rxb->skb =
3855                     alloc_skb(priv->hw_setting.rx_buf_size,
3856                                 __GFP_NOWARN | GFP_ATOMIC);
3857                 if (!rxb->skb) {
3858                         if (net_ratelimit())
3859                                 printk(KERN_CRIT DRV_NAME
3860                                        ": Can not allocate SKB buffers\n");
3861                         /* We don't reschedule replenish work here -- we will
3862                          * call the restock method and if it still needs
3863                          * more buffers it will schedule replenish */
3864                         break;
3865                 }
3866                 priv->alloc_rxb_skb++;
3867                 list_del(element);
3868
3869                 /* Get physical address of RB/SKB */
3870                 rxb->dma_addr =
3871                     pci_map_single(priv->pci_dev, rxb->skb->data,
3872                            priv->hw_setting.rx_buf_size, PCI_DMA_FROMDEVICE);
3873                 list_add_tail(&rxb->list, &rxq->rx_free);
3874                 rxq->free_count++;
3875         }
3876         spin_unlock_irqrestore(&rxq->lock, flags);
3877 }
3878
3879 /*
3880  * this should be called while priv->lock is locked
3881 */
3882 static void __iwl4965_rx_replenish(void *data)
3883 {
3884         struct iwl_priv *priv = data;
3885
3886         iwl4965_rx_allocate(priv);
3887         iwl4965_rx_queue_restock(priv);
3888 }
3889
3890
3891 void iwl4965_rx_replenish(void *data)
3892 {
3893         struct iwl_priv *priv = data;
3894         unsigned long flags;
3895
3896         iwl4965_rx_allocate(priv);
3897
3898         spin_lock_irqsave(&priv->lock, flags);
3899         iwl4965_rx_queue_restock(priv);
3900         spin_unlock_irqrestore(&priv->lock, flags);
3901 }
3902
3903 /* Assumes that the skb field of the buffers in 'pool' is kept accurate.
3904  * If an SKB has been detached, the POOL needs to have its SKB set to NULL
3905  * This free routine walks the list of POOL entries and if SKB is set to
3906  * non NULL it is unmapped and freed
3907  */
3908 static void iwl4965_rx_queue_free(struct iwl_priv *priv, struct iwl4965_rx_queue *rxq)
3909 {
3910         int i;
3911         for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
3912                 if (rxq->pool[i].skb != NULL) {
3913                         pci_unmap_single(priv->pci_dev,
3914                                          rxq->pool[i].dma_addr,
3915                                          priv->hw_setting.rx_buf_size,
3916                                          PCI_DMA_FROMDEVICE);
3917                         dev_kfree_skb(rxq->pool[i].skb);
3918                 }
3919         }
3920
3921         pci_free_consistent(priv->pci_dev, 4 * RX_QUEUE_SIZE, rxq->bd,
3922                             rxq->dma_addr);
3923         rxq->bd = NULL;
3924 }
3925
3926 int iwl4965_rx_queue_alloc(struct iwl_priv *priv)
3927 {
3928         struct iwl4965_rx_queue *rxq = &priv->rxq;
3929         struct pci_dev *dev = priv->pci_dev;
3930         int i;
3931
3932         spin_lock_init(&rxq->lock);
3933         INIT_LIST_HEAD(&rxq->rx_free);
3934         INIT_LIST_HEAD(&rxq->rx_used);
3935
3936         /* Alloc the circular buffer of Read Buffer Descriptors (RBDs) */
3937         rxq->bd = pci_alloc_consistent(dev, 4 * RX_QUEUE_SIZE, &rxq->dma_addr);
3938         if (!rxq->bd)
3939                 return -ENOMEM;
3940
3941         /* Fill the rx_used queue with _all_ of the Rx buffers */
3942         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++)
3943                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
3944
3945         /* Set us so that we have processed and used all buffers, but have
3946          * not restocked the Rx queue with fresh buffers */
3947         rxq->read = rxq->write = 0;
3948         rxq->free_count = 0;
3949         rxq->need_update = 0;
3950         return 0;
3951 }
3952
3953 void iwl4965_rx_queue_reset(struct iwl_priv *priv, struct iwl4965_rx_queue *rxq)
3954 {
3955         unsigned long flags;
3956         int i;
3957         spin_lock_irqsave(&rxq->lock, flags);
3958         INIT_LIST_HEAD(&rxq->rx_free);
3959         INIT_LIST_HEAD(&rxq->rx_used);
3960         /* Fill the rx_used queue with _all_ of the Rx buffers */
3961         for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
3962                 /* In the reset function, these buffers may have been allocated
3963                  * to an SKB, so we need to unmap and free potential storage */
3964                 if (rxq->pool[i].skb != NULL) {
3965                         pci_unmap_single(priv->pci_dev,
3966                                          rxq->pool[i].dma_addr,
3967                                          priv->hw_setting.rx_buf_size,
3968                                          PCI_DMA_FROMDEVICE);
3969                         priv->alloc_rxb_skb--;
3970                         dev_kfree_skb(rxq->pool[i].skb);
3971                         rxq->pool[i].skb = NULL;
3972                 }
3973                 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
3974         }
3975
3976         /* Set us so that we have processed and used all buffers, but have
3977          * not restocked the Rx queue with fresh buffers */
3978         rxq->read = rxq->write = 0;
3979         rxq->free_count = 0;
3980         spin_unlock_irqrestore(&rxq->lock, flags);
3981 }
3982
3983 /* Convert linear signal-to-noise ratio into dB */
3984 static u8 ratio2dB[100] = {
3985 /*       0   1   2   3   4   5   6   7   8   9 */
3986          0,  0,  6, 10, 12, 14, 16, 17, 18, 19, /* 00 - 09 */
3987         20, 21, 22, 22, 23, 23, 24, 25, 26, 26, /* 10 - 19 */
3988         26, 26, 26, 27, 27, 28, 28, 28, 29, 29, /* 20 - 29 */
3989         29, 30, 30, 30, 31, 31, 31, 31, 32, 32, /* 30 - 39 */
3990         32, 32, 32, 33, 33, 33, 33, 33, 34, 34, /* 40 - 49 */
3991         34, 34, 34, 34, 35, 35, 35, 35, 35, 35, /* 50 - 59 */
3992         36, 36, 36, 36, 36, 36, 36, 37, 37, 37, /* 60 - 69 */
3993         37, 37, 37, 37, 37, 38, 38, 38, 38, 38, /* 70 - 79 */
3994         38, 38, 38, 38, 38, 39, 39, 39, 39, 39, /* 80 - 89 */
3995         39, 39, 39, 39, 39, 40, 40, 40, 40, 40  /* 90 - 99 */
3996 };
3997
3998 /* Calculates a relative dB value from a ratio of linear
3999  *   (i.e. not dB) signal levels.
4000  * Conversion assumes that levels are voltages (20*log), not powers (10*log). */
4001 int iwl4965_calc_db_from_ratio(int sig_ratio)
4002 {
4003         /* 1000:1 or higher just report as 60 dB */
4004         if (sig_ratio >= 1000)
4005                 return 60;
4006
4007         /* 100:1 or higher, divide by 10 and use table,
4008          *   add 20 dB to make up for divide by 10 */
4009         if (sig_ratio >= 100)
4010                 return (20 + (int)ratio2dB[sig_ratio/10]);
4011
4012         /* We shouldn't see this */
4013         if (sig_ratio < 1)
4014                 return 0;
4015
4016         /* Use table for ratios 1:1 - 99:1 */
4017         return (int)ratio2dB[sig_ratio];
4018 }
4019
4020 #define PERFECT_RSSI (-20) /* dBm */
4021 #define WORST_RSSI (-95)   /* dBm */
4022 #define RSSI_RANGE (PERFECT_RSSI - WORST_RSSI)
4023
4024 /* Calculate an indication of rx signal quality (a percentage, not dBm!).
4025  * See http://www.ces.clemson.edu/linux/signal_quality.shtml for info
4026  *   about formulas used below. */
4027 int iwl4965_calc_sig_qual(int rssi_dbm, int noise_dbm)
4028 {
4029         int sig_qual;
4030         int degradation = PERFECT_RSSI - rssi_dbm;
4031
4032         /* If we get a noise measurement, use signal-to-noise ratio (SNR)
4033          * as indicator; formula is (signal dbm - noise dbm).
4034          * SNR at or above 40 is a great signal (100%).
4035          * Below that, scale to fit SNR of 0 - 40 dB within 0 - 100% indicator.
4036          * Weakest usable signal is usually 10 - 15 dB SNR. */
4037         if (noise_dbm) {
4038                 if (rssi_dbm - noise_dbm >= 40)
4039                         return 100;
4040                 else if (rssi_dbm < noise_dbm)
4041                         return 0;
4042                 sig_qual = ((rssi_dbm - noise_dbm) * 5) / 2;
4043
4044         /* Else use just the signal level.
4045          * This formula is a least squares fit of data points collected and
4046          *   compared with a reference system that had a percentage (%) display
4047          *   for signal quality. */
4048         } else
4049                 sig_qual = (100 * (RSSI_RANGE * RSSI_RANGE) - degradation *
4050                             (15 * RSSI_RANGE + 62 * degradation)) /
4051                            (RSSI_RANGE * RSSI_RANGE);
4052
4053         if (sig_qual > 100)
4054                 sig_qual = 100;
4055         else if (sig_qual < 1)
4056                 sig_qual = 0;
4057
4058         return sig_qual;
4059 }
4060
4061 /**
4062  * iwl4965_rx_handle - Main entry function for receiving responses from uCode
4063  *
4064  * Uses the priv->rx_handlers callback function array to invoke
4065  * the appropriate handlers, including command responses,
4066  * frame-received notifications, and other notifications.
4067  */
4068 static void iwl4965_rx_handle(struct iwl_priv *priv)
4069 {
4070         struct iwl4965_rx_mem_buffer *rxb;
4071         struct iwl4965_rx_packet *pkt;
4072         struct iwl4965_rx_queue *rxq = &priv->rxq;
4073         u32 r, i;
4074         int reclaim;
4075         unsigned long flags;
4076         u8 fill_rx = 0;
4077         u32 count = 8;
4078
4079         /* uCode's read index (stored in shared DRAM) indicates the last Rx
4080          * buffer that the driver may process (last buffer filled by ucode). */
4081         r = iwl4965_hw_get_rx_read(priv);
4082         i = rxq->read;
4083
4084         /* Rx interrupt, but nothing sent from uCode */
4085         if (i == r)
4086                 IWL_DEBUG(IWL_DL_RX | IWL_DL_ISR, "r = %d, i = %d\n", r, i);
4087
4088         if (iwl4965_rx_queue_space(rxq) > (RX_QUEUE_SIZE / 2))
4089                 fill_rx = 1;
4090
4091         while (i != r) {
4092                 rxb = rxq->queue[i];
4093
4094                 /* If an RXB doesn't have a Rx queue slot associated with it,
4095                  * then a bug has been introduced in the queue refilling
4096                  * routines -- catch it here */
4097                 BUG_ON(rxb == NULL);
4098
4099                 rxq->queue[i] = NULL;
4100
4101                 pci_dma_sync_single_for_cpu(priv->pci_dev, rxb->dma_addr,
4102                                             priv->hw_setting.rx_buf_size,
4103                                             PCI_DMA_FROMDEVICE);
4104                 pkt = (struct iwl4965_rx_packet *)rxb->skb->data;
4105
4106                 /* Reclaim a command buffer only if this packet is a response
4107                  *   to a (driver-originated) command.
4108                  * If the packet (e.g. Rx frame) originated from uCode,
4109                  *   there is no command buffer to reclaim.
4110                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
4111                  *   but apparently a few don't get set; catch them here. */
4112                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
4113                         (pkt->hdr.cmd != REPLY_RX_PHY_CMD) &&
4114                         (pkt->hdr.cmd != REPLY_RX) &&
4115                         (pkt->hdr.cmd != REPLY_COMPRESSED_BA) &&
4116                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
4117                         (pkt->hdr.cmd != REPLY_TX);
4118
4119                 /* Based on type of command response or notification,
4120                  *   handle those that need handling via function in
4121                  *   rx_handlers table.  See iwl4965_setup_rx_handlers() */
4122                 if (priv->rx_handlers[pkt->hdr.cmd]) {
4123                         IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
4124                                 "r = %d, i = %d, %s, 0x%02x\n", r, i,
4125                                 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
4126                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
4127                 } else {
4128                         /* No handling needed */
4129                         IWL_DEBUG(IWL_DL_HOST_COMMAND | IWL_DL_RX | IWL_DL_ISR,
4130                                 "r %d i %d No handler needed for %s, 0x%02x\n",
4131                                 r, i, get_cmd_string(pkt->hdr.cmd),
4132                                 pkt->hdr.cmd);
4133                 }
4134
4135                 if (reclaim) {
4136                         /* Invoke any callbacks, transfer the skb to caller, and
4137                          * fire off the (possibly) blocking iwl_send_cmd()
4138                          * as we reclaim the driver command queue */
4139                         if (rxb && rxb->skb)
4140                                 iwl4965_tx_cmd_complete(priv, rxb);
4141                         else
4142                                 IWL_WARNING("Claim null rxb?\n");
4143                 }
4144
4145                 /* For now we just don't re-use anything.  We can tweak this
4146                  * later to try and re-use notification packets and SKBs that
4147                  * fail to Rx correctly */
4148                 if (rxb->skb != NULL) {
4149                         priv->alloc_rxb_skb--;
4150                         dev_kfree_skb_any(rxb->skb);
4151                         rxb->skb = NULL;
4152                 }
4153
4154                 pci_unmap_single(priv->pci_dev, rxb->dma_addr,
4155                                  priv->hw_setting.rx_buf_size,
4156                                  PCI_DMA_FROMDEVICE);
4157                 spin_lock_irqsave(&rxq->lock, flags);
4158                 list_add_tail(&rxb->list, &priv->rxq.rx_used);
4159                 spin_unlock_irqrestore(&rxq->lock, flags);
4160                 i = (i + 1) & RX_QUEUE_MASK;
4161                 /* If there are a lot of unused frames,
4162                  * restock the Rx queue so ucode wont assert. */
4163                 if (fill_rx) {
4164                         count++;
4165                         if (count >= 8) {
4166                                 priv->rxq.read = i;
4167                                 __iwl4965_rx_replenish(priv);
4168                                 count = 0;
4169                         }
4170                 }
4171         }
4172
4173         /* Backtrack one entry */
4174         priv->rxq.read = i;
4175         iwl4965_rx_queue_restock(priv);
4176 }
4177
4178 /**
4179  * iwl4965_tx_queue_update_write_ptr - Send new write index to hardware
4180  */
4181 static int iwl4965_tx_queue_update_write_ptr(struct iwl_priv *priv,
4182                                   struct iwl4965_tx_queue *txq)
4183 {
4184         u32 reg = 0;
4185         int rc = 0;
4186         int txq_id = txq->q.id;
4187
4188         if (txq->need_update == 0)
4189                 return rc;
4190
4191         /* if we're trying to save power */
4192         if (test_bit(STATUS_POWER_PMI, &priv->status)) {
4193                 /* wake up nic if it's powered down ...
4194                  * uCode will wake up, and interrupt us again, so next
4195                  * time we'll skip this part. */
4196                 reg = iwl_read32(priv, CSR_UCODE_DRV_GP1);
4197
4198                 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
4199                         IWL_DEBUG_INFO("Requesting wakeup, GP1 = 0x%x\n", reg);
4200                         iwl_set_bit(priv, CSR_GP_CNTRL,
4201                                     CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
4202                         return rc;
4203                 }
4204
4205                 /* restore this queue's parameters in nic hardware. */
4206                 rc = iwl_grab_nic_access(priv);
4207                 if (rc)
4208                         return rc;
4209                 iwl_write_direct32(priv, HBUS_TARG_WRPTR,
4210                                      txq->q.write_ptr | (txq_id << 8));
4211                 iwl_release_nic_access(priv);
4212
4213         /* else not in power-save mode, uCode will never sleep when we're
4214          * trying to tx (during RFKILL, we're not trying to tx). */
4215         } else
4216                 iwl_write32(priv, HBUS_TARG_WRPTR,
4217                             txq->q.write_ptr | (txq_id << 8));
4218
4219         txq->need_update = 0;
4220
4221         return rc;
4222 }
4223
4224 #ifdef CONFIG_IWLWIFI_DEBUG
4225 static void iwl4965_print_rx_config_cmd(struct iwl4965_rxon_cmd *rxon)
4226 {
4227         DECLARE_MAC_BUF(mac);
4228
4229         IWL_DEBUG_RADIO("RX CONFIG:\n");
4230         iwl_print_hex_dump(IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
4231         IWL_DEBUG_RADIO("u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
4232         IWL_DEBUG_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
4233         IWL_DEBUG_RADIO("u32 filter_flags: 0x%08x\n",
4234                         le32_to_cpu(rxon->filter_flags));
4235         IWL_DEBUG_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type);
4236         IWL_DEBUG_RADIO("u8 ofdm_basic_rates: 0x%02x\n",
4237                         rxon->ofdm_basic_rates);
4238         IWL_DEBUG_RADIO("u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
4239         IWL_DEBUG_RADIO("u8[6] node_addr: %s\n",
4240                         print_mac(mac, rxon->node_addr));
4241         IWL_DEBUG_RADIO("u8[6] bssid_addr: %s\n",
4242                         print_mac(mac, rxon->bssid_addr));
4243         IWL_DEBUG_RADIO("u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
4244 }
4245 #endif
4246
4247 static void iwl4965_enable_interrupts(struct iwl_priv *priv)
4248 {
4249         IWL_DEBUG_ISR("Enabling interrupts\n");
4250         set_bit(STATUS_INT_ENABLED, &priv->status);
4251         iwl_write32(priv, CSR_INT_MASK, CSR_INI_SET_MASK);
4252 }
4253
4254 /* call this function to flush any scheduled tasklet */
4255 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
4256 {
4257         /* wait to make sure we flush pedding tasklet*/
4258         synchronize_irq(priv->pci_dev->irq);
4259         tasklet_kill(&priv->irq_tasklet);
4260 }
4261
4262 static inline void iwl4965_disable_interrupts(struct iwl_priv *priv)
4263 {
4264         clear_bit(STATUS_INT_ENABLED, &priv->status);
4265
4266         /* disable interrupts from uCode/NIC to host */
4267         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
4268
4269         /* acknowledge/clear/reset any interrupts still pending
4270          * from uCode or flow handler (Rx/Tx DMA) */
4271         iwl_write32(priv, CSR_INT, 0xffffffff);
4272         iwl_write32(priv, CSR_FH_INT_STATUS, 0xffffffff);
4273         IWL_DEBUG_ISR("Disabled interrupts\n");
4274 }
4275
4276 static const char *desc_lookup(int i)
4277 {
4278         switch (i) {
4279         case 1:
4280                 return "FAIL";
4281         case 2:
4282                 return "BAD_PARAM";
4283         case 3:
4284                 return "BAD_CHECKSUM";
4285         case 4:
4286                 return "NMI_INTERRUPT";
4287         case 5:
4288                 return "SYSASSERT";
4289         case 6:
4290                 return "FATAL_ERROR";
4291         }
4292
4293         return "UNKNOWN";
4294 }
4295
4296 #define ERROR_START_OFFSET  (1 * sizeof(u32))
4297 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
4298
4299 static void iwl4965_dump_nic_error_log(struct iwl_priv *priv)
4300 {
4301         u32 data2, line;
4302         u32 desc, time, count, base, data1;
4303         u32 blink1, blink2, ilink1, ilink2;
4304         int rc;
4305
4306         base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
4307
4308         if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
4309                 IWL_ERROR("Not valid error log pointer 0x%08X\n", base);
4310                 return;
4311         }
4312
4313         rc = iwl_grab_nic_access(priv);
4314         if (rc) {
4315                 IWL_WARNING("Can not read from adapter at this time.\n");
4316                 return;
4317         }
4318
4319         count = iwl_read_targ_mem(priv, base);
4320
4321         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
4322                 IWL_ERROR("Start IWL Error Log Dump:\n");
4323                 IWL_ERROR("Status: 0x%08lX, count: %d\n", priv->status, count);
4324         }
4325
4326         desc = iwl_read_targ_mem(priv, base + 1 * sizeof(u32));
4327         blink1 = iwl_read_targ_mem(priv, base + 3 * sizeof(u32));
4328         blink2 = iwl_read_targ_mem(priv, base + 4 * sizeof(u32));
4329         ilink1 = iwl_read_targ_mem(priv, base + 5 * sizeof(u32));
4330         ilink2 = iwl_read_targ_mem(priv, base + 6 * sizeof(u32));
4331         data1 = iwl_read_targ_mem(priv, base + 7 * sizeof(u32));
4332         data2 = iwl_read_targ_mem(priv, base + 8 * sizeof(u32));
4333         line = iwl_read_targ_mem(priv, base + 9 * sizeof(u32));
4334         time = iwl_read_targ_mem(priv, base + 11 * sizeof(u32));
4335
4336         IWL_ERROR("Desc               Time       "
4337                   "data1      data2      line\n");
4338         IWL_ERROR("%-13s (#%d) %010u 0x%08X 0x%08X %u\n",
4339                   desc_lookup(desc), desc, time, data1, data2, line);
4340         IWL_ERROR("blink1  blink2  ilink1  ilink2\n");
4341         IWL_ERROR("0x%05X 0x%05X 0x%05X 0x%05X\n", blink1, blink2,
4342                   ilink1, ilink2);
4343
4344         iwl_release_nic_access(priv);
4345 }
4346
4347 #define EVENT_START_OFFSET  (4 * sizeof(u32))
4348
4349 /**
4350  * iwl4965_print_event_log - Dump error event log to syslog
4351  *
4352  * NOTE: Must be called with iwl_grab_nic_access() already obtained!
4353  */
4354 static void iwl4965_print_event_log(struct iwl_priv *priv, u32 start_idx,
4355                                 u32 num_events, u32 mode)
4356 {
4357         u32 i;
4358         u32 base;       /* SRAM byte address of event log header */
4359         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
4360         u32 ptr;        /* SRAM byte address of log data */
4361         u32 ev, time, data; /* event log data */
4362
4363         if (num_events == 0)
4364                 return;
4365
4366         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4367
4368         if (mode == 0)
4369                 event_size = 2 * sizeof(u32);
4370         else
4371                 event_size = 3 * sizeof(u32);
4372
4373         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
4374
4375         /* "time" is actually "data" for mode 0 (no timestamp).
4376          * place event id # at far right for easier visual parsing. */
4377         for (i = 0; i < num_events; i++) {
4378                 ev = iwl_read_targ_mem(priv, ptr);
4379                 ptr += sizeof(u32);
4380                 time = iwl_read_targ_mem(priv, ptr);
4381                 ptr += sizeof(u32);
4382                 if (mode == 0)
4383                         IWL_ERROR("0x%08x\t%04u\n", time, ev); /* data, ev */
4384                 else {
4385                         data = iwl_read_targ_mem(priv, ptr);
4386                         ptr += sizeof(u32);
4387                         IWL_ERROR("%010u\t0x%08x\t%04u\n", time, data, ev);
4388                 }
4389         }
4390 }
4391
4392 static void iwl4965_dump_nic_event_log(struct iwl_priv *priv)
4393 {
4394         int rc;
4395         u32 base;       /* SRAM byte address of event log header */
4396         u32 capacity;   /* event log capacity in # entries */
4397         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
4398         u32 num_wraps;  /* # times uCode wrapped to top of log */
4399         u32 next_entry; /* index of next entry to be written by uCode */
4400         u32 size;       /* # entries that we'll print */
4401
4402         base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
4403         if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
4404                 IWL_ERROR("Invalid event log pointer 0x%08X\n", base);
4405                 return;
4406         }
4407
4408         rc = iwl_grab_nic_access(priv);
4409         if (rc) {
4410                 IWL_WARNING("Can not read from adapter at this time.\n");
4411                 return;
4412         }
4413
4414         /* event log header */
4415         capacity = iwl_read_targ_mem(priv, base);
4416         mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
4417         num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
4418         next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
4419
4420         size = num_wraps ? capacity : next_entry;
4421
4422         /* bail out if nothing in log */
4423         if (size == 0) {
4424                 IWL_ERROR("Start IWL Event Log Dump: nothing in log\n");
4425                 iwl_release_nic_access(priv);
4426                 return;
4427         }
4428
4429         IWL_ERROR("Start IWL Event Log Dump: display count %d, wraps %d\n",
4430                   size, num_wraps);
4431
4432         /* if uCode has wrapped back to top of log, start at the oldest entry,
4433          * i.e the next one that uCode would fill. */
4434         if (num_wraps)
4435                 iwl4965_print_event_log(priv, next_entry,
4436                                     capacity - next_entry, mode);
4437
4438         /* (then/else) start at top of log */
4439         iwl4965_print_event_log(priv, 0, next_entry, mode);
4440
4441         iwl_release_nic_access(priv);
4442 }
4443
4444 /**
4445  * iwl4965_irq_handle_error - called for HW or SW error interrupt from card
4446  */
4447 static void iwl4965_irq_handle_error(struct iwl_priv *priv)
4448 {
4449         /* Set the FW error flag -- cleared on iwl4965_down */
4450         set_bit(STATUS_FW_ERROR, &priv->status);
4451
4452         /* Cancel currently queued command. */
4453         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
4454
4455 #ifdef CONFIG_IWLWIFI_DEBUG
4456         if (iwl_debug_level & IWL_DL_FW_ERRORS) {
4457                 iwl4965_dump_nic_error_log(priv);
4458                 iwl4965_dump_nic_event_log(priv);
4459                 iwl4965_print_rx_config_cmd(&priv->staging_rxon);
4460         }
4461 #endif
4462
4463         wake_up_interruptible(&priv->wait_command_queue);
4464
4465         /* Keep the restart process from trying to send host
4466          * commands by clearing the INIT status bit */
4467         clear_bit(STATUS_READY, &priv->status);
4468
4469         if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
4470                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_FW_ERRORS,
4471                           "Restarting adapter due to uCode error.\n");
4472
4473                 if (iwl_is_associated(priv)) {
4474                         memcpy(&priv->recovery_rxon, &priv->active_rxon,
4475                                sizeof(priv->recovery_rxon));
4476                         priv->error_recovering = 1;
4477                 }
4478                 queue_work(priv->workqueue, &priv->restart);
4479         }
4480 }
4481
4482 static void iwl4965_error_recovery(struct iwl_priv *priv)
4483 {
4484         unsigned long flags;
4485
4486         memcpy(&priv->staging_rxon, &priv->recovery_rxon,
4487                sizeof(priv->staging_rxon));
4488         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
4489         iwl4965_commit_rxon(priv);
4490
4491         iwl4965_rxon_add_station(priv, priv->bssid, 1);
4492
4493         spin_lock_irqsave(&priv->lock, flags);
4494         priv->assoc_id = le16_to_cpu(priv->staging_rxon.assoc_id);
4495         priv->error_recovering = 0;
4496         spin_unlock_irqrestore(&priv->lock, flags);
4497 }
4498
4499 static void iwl4965_irq_tasklet(struct iwl_priv *priv)
4500 {
4501         u32 inta, handled = 0;
4502         u32 inta_fh;
4503         unsigned long flags;
4504 #ifdef CONFIG_IWLWIFI_DEBUG
4505         u32 inta_mask;
4506 #endif
4507
4508         spin_lock_irqsave(&priv->lock, flags);
4509
4510         /* Ack/clear/reset pending uCode interrupts.
4511          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
4512          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
4513         inta = iwl_read32(priv, CSR_INT);
4514         iwl_write32(priv, CSR_INT, inta);
4515
4516         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
4517          * Any new interrupts that happen after this, either while we're
4518          * in this tasklet, or later, will show up in next ISR/tasklet. */
4519         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
4520         iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
4521
4522 #ifdef CONFIG_IWLWIFI_DEBUG
4523         if (iwl_debug_level & IWL_DL_ISR) {
4524                 /* just for debug */
4525                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
4526                 IWL_DEBUG_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
4527                               inta, inta_mask, inta_fh);
4528         }
4529 #endif
4530
4531         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
4532          * atomic, make sure that inta covers all the interrupts that
4533          * we've discovered, even if FH interrupt came in just after
4534          * reading CSR_INT. */
4535         if (inta_fh & CSR49_FH_INT_RX_MASK)
4536                 inta |= CSR_INT_BIT_FH_RX;
4537         if (inta_fh & CSR49_FH_INT_TX_MASK)
4538                 inta |= CSR_INT_BIT_FH_TX;
4539
4540         /* Now service all interrupt bits discovered above. */
4541         if (inta & CSR_INT_BIT_HW_ERR) {
4542                 IWL_ERROR("Microcode HW error detected.  Restarting.\n");
4543
4544                 /* Tell the device to stop sending interrupts */
4545                 iwl4965_disable_interrupts(priv);
4546
4547                 iwl4965_irq_handle_error(priv);
4548
4549                 handled |= CSR_INT_BIT_HW_ERR;
4550
4551                 spin_unlock_irqrestore(&priv->lock, flags);
4552
4553                 return;
4554         }
4555
4556 #ifdef CONFIG_IWLWIFI_DEBUG
4557         if (iwl_debug_level & (IWL_DL_ISR)) {
4558                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
4559                 if (inta & CSR_INT_BIT_SCD)
4560                         IWL_DEBUG_ISR("Scheduler finished to transmit "
4561                                       "the frame/frames.\n");
4562
4563                 /* Alive notification via Rx interrupt will do the real work */
4564                 if (inta & CSR_INT_BIT_ALIVE)
4565                         IWL_DEBUG_ISR("Alive interrupt\n");
4566         }
4567 #endif
4568         /* Safely ignore these bits for debug checks below */
4569         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
4570
4571         /* HW RF KILL switch toggled */
4572         if (inta & CSR_INT_BIT_RF_KILL) {
4573                 int hw_rf_kill = 0;
4574                 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
4575                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
4576                         hw_rf_kill = 1;
4577
4578                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL | IWL_DL_ISR,
4579                                 "RF_KILL bit toggled to %s.\n",
4580                                 hw_rf_kill ? "disable radio":"enable radio");
4581
4582                 /* Queue restart only if RF_KILL switch was set to "kill"
4583                  *   when we loaded driver, and is now set to "enable".
4584                  * After we're Alive, RF_KILL gets handled by
4585                  *   iwl4965_rx_card_state_notif() */
4586                 if (!hw_rf_kill && !test_bit(STATUS_ALIVE, &priv->status)) {
4587                         clear_bit(STATUS_RF_KILL_HW, &priv->status);
4588                         queue_work(priv->workqueue, &priv->restart);
4589                 }
4590
4591                 handled |= CSR_INT_BIT_RF_KILL;
4592         }
4593
4594         /* Chip got too hot and stopped itself */
4595         if (inta & CSR_INT_BIT_CT_KILL) {
4596                 IWL_ERROR("Microcode CT kill error detected.\n");
4597                 handled |= CSR_INT_BIT_CT_KILL;
4598         }
4599
4600         /* Error detected by uCode */
4601         if (inta & CSR_INT_BIT_SW_ERR) {
4602                 IWL_ERROR("Microcode SW error detected.  Restarting 0x%X.\n",
4603                           inta);
4604                 iwl4965_irq_handle_error(priv);
4605                 handled |= CSR_INT_BIT_SW_ERR;
4606         }
4607
4608         /* uCode wakes up after power-down sleep */
4609         if (inta & CSR_INT_BIT_WAKEUP) {
4610                 IWL_DEBUG_ISR("Wakeup interrupt\n");
4611                 iwl4965_rx_queue_update_write_ptr(priv, &priv->rxq);
4612                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[0]);
4613                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[1]);
4614                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[2]);
4615                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[3]);
4616                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[4]);
4617                 iwl4965_tx_queue_update_write_ptr(priv, &priv->txq[5]);
4618
4619                 handled |= CSR_INT_BIT_WAKEUP;
4620         }
4621
4622         /* All uCode command responses, including Tx command responses,
4623          * Rx "responses" (frame-received notification), and other
4624          * notifications from uCode come through here*/
4625         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
4626                 iwl4965_rx_handle(priv);
4627                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
4628         }
4629
4630         if (inta & CSR_INT_BIT_FH_TX) {
4631                 IWL_DEBUG_ISR("Tx interrupt\n");
4632                 handled |= CSR_INT_BIT_FH_TX;
4633         }
4634
4635         if (inta & ~handled)
4636                 IWL_ERROR("Unhandled INTA bits 0x%08x\n", inta & ~handled);
4637
4638         if (inta & ~CSR_INI_SET_MASK) {
4639                 IWL_WARNING("Disabled INTA bits 0x%08x were pending\n",
4640                          inta & ~CSR_INI_SET_MASK);
4641                 IWL_WARNING("   with FH_INT = 0x%08x\n", inta_fh);
4642         }
4643
4644         /* Re-enable all interrupts */
4645         /* only Re-enable if diabled by irq */
4646         if (test_bit(STATUS_INT_ENABLED, &priv->status))
4647                 iwl4965_enable_interrupts(priv);
4648
4649 #ifdef CONFIG_IWLWIFI_DEBUG
4650         if (iwl_debug_level & (IWL_DL_ISR)) {
4651                 inta = iwl_read32(priv, CSR_INT);
4652                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
4653                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
4654                 IWL_DEBUG_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
4655                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
4656         }
4657 #endif
4658         spin_unlock_irqrestore(&priv->lock, flags);
4659 }
4660
4661 static irqreturn_t iwl4965_isr(int irq, void *data)
4662 {
4663         struct iwl_priv *priv = data;
4664         u32 inta, inta_mask;
4665         u32 inta_fh;
4666         if (!priv)
4667                 return IRQ_NONE;
4668
4669         spin_lock(&priv->lock);
4670
4671         /* Disable (but don't clear!) interrupts here to avoid
4672          *    back-to-back ISRs and sporadic interrupts from our NIC.
4673          * If we have something to service, the tasklet will re-enable ints.
4674          * If we *don't* have something, we'll re-enable before leaving here. */
4675         inta_mask = iwl_read32(priv, CSR_INT_MASK);  /* just for debug */
4676         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
4677
4678         /* Discover which interrupts are active/pending */
4679         inta = iwl_read32(priv, CSR_INT);
4680         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
4681
4682         /* Ignore interrupt if there's nothing in NIC to service.
4683          * This may be due to IRQ shared with another device,
4684          * or due to sporadic interrupts thrown from our NIC. */
4685         if (!inta && !inta_fh) {
4686                 IWL_DEBUG_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n");
4687                 goto none;
4688         }
4689
4690         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
4691                 /* Hardware disappeared. It might have already raised
4692                  * an interrupt */
4693                 IWL_WARNING("HARDWARE GONE?? INTA == 0x%080x\n", inta);
4694                 goto unplugged;
4695         }
4696
4697         IWL_DEBUG_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
4698                       inta, inta_mask, inta_fh);
4699
4700         inta &= ~CSR_INT_BIT_SCD;
4701
4702         /* iwl4965_irq_tasklet() will service interrupts and re-enable them */
4703         if (likely(inta || inta_fh))
4704                 tasklet_schedule(&priv->irq_tasklet);
4705
4706  unplugged:
4707         spin_unlock(&priv->lock);
4708         return IRQ_HANDLED;
4709
4710  none:
4711         /* re-enable interrupts here since we don't have anything to service. */
4712         /* only Re-enable if diabled by irq */
4713         if (test_bit(STATUS_INT_ENABLED, &priv->status))
4714                 iwl4965_enable_interrupts(priv);
4715         spin_unlock(&priv->lock);
4716         return IRQ_NONE;
4717 }
4718
4719 /* For active scan, listen ACTIVE_DWELL_TIME (msec) on each channel after
4720  * sending probe req.  This should be set long enough to hear probe responses
4721  * from more than one AP.  */
4722 #define IWL_ACTIVE_DWELL_TIME_24    (20)        /* all times in msec */
4723 #define IWL_ACTIVE_DWELL_TIME_52    (10)
4724
4725 /* For faster active scanning, scan will move to the next channel if fewer than
4726  * PLCP_QUIET_THRESH packets are heard on this channel within
4727  * ACTIVE_QUIET_TIME after sending probe request.  This shortens the dwell
4728  * time if it's a quiet channel (nothing responded to our probe, and there's
4729  * no other traffic).
4730  * Disable "quiet" feature by setting PLCP_QUIET_THRESH to 0. */
4731 #define IWL_PLCP_QUIET_THRESH       __constant_cpu_to_le16(1)   /* packets */
4732 #define IWL_ACTIVE_QUIET_TIME       __constant_cpu_to_le16(5)   /* msec */
4733
4734 /* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel.
4735  * Must be set longer than active dwell time.
4736  * For the most reliable scan, set > AP beacon interval (typically 100msec). */
4737 #define IWL_PASSIVE_DWELL_TIME_24   (20)        /* all times in msec */
4738 #define IWL_PASSIVE_DWELL_TIME_52   (10)
4739 #define IWL_PASSIVE_DWELL_BASE      (100)
4740 #define IWL_CHANNEL_TUNE_TIME       5
4741
4742 static inline u16 iwl4965_get_active_dwell_time(struct iwl_priv *priv,
4743                                                 enum ieee80211_band band)
4744 {
4745         if (band == IEEE80211_BAND_5GHZ)
4746                 return IWL_ACTIVE_DWELL_TIME_52;
4747         else
4748                 return IWL_ACTIVE_DWELL_TIME_24;
4749 }
4750
4751 static u16 iwl4965_get_passive_dwell_time(struct iwl_priv *priv,
4752                                           enum ieee80211_band band)
4753 {
4754         u16 active = iwl4965_get_active_dwell_time(priv, band);
4755         u16 passive = (band != IEEE80211_BAND_5GHZ) ?
4756             IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_24 :
4757             IWL_PASSIVE_DWELL_BASE + IWL_PASSIVE_DWELL_TIME_52;
4758
4759         if (iwl_is_associated(priv)) {
4760                 /* If we're associated, we clamp the maximum passive
4761                  * dwell time to be 98% of the beacon interval (minus
4762                  * 2 * channel tune time) */
4763                 passive = priv->beacon_int;
4764                 if ((passive > IWL_PASSIVE_DWELL_BASE) || !passive)
4765                         passive = IWL_PASSIVE_DWELL_BASE;
4766                 passive = (passive * 98) / 100 - IWL_CHANNEL_TUNE_TIME * 2;
4767         }
4768
4769         if (passive <= active)
4770                 passive = active + 1;
4771
4772         return passive;
4773 }
4774
4775 static int iwl4965_get_channels_for_scan(struct iwl_priv *priv,
4776                                          enum ieee80211_band band,
4777                                      u8 is_active, u8 direct_mask,
4778                                      struct iwl4965_scan_channel *scan_ch)
4779 {
4780         const struct ieee80211_channel *channels = NULL;
4781         const struct ieee80211_supported_band *sband;
4782         const struct iwl_channel_info *ch_info;
4783         u16 passive_dwell = 0;
4784         u16 active_dwell = 0;
4785         int added, i;
4786
4787         sband = iwl4965_get_hw_mode(priv, band);
4788         if (!sband)
4789                 return 0;
4790
4791         channels = sband->channels;
4792
4793         active_dwell = iwl4965_get_active_dwell_time(priv, band);
4794         passive_dwell = iwl4965_get_passive_dwell_time(priv, band);
4795
4796         for (i = 0, added = 0; i < sband->n_channels; i++) {
4797                 if (channels[i].flags & IEEE80211_CHAN_DISABLED)
4798                         continue;
4799
4800                 if (ieee80211_frequency_to_channel(channels[i].center_freq) ==
4801                     le16_to_cpu(priv->active_rxon.channel)) {
4802                         if (iwl_is_associated(priv)) {
4803                                 IWL_DEBUG_SCAN
4804                                     ("Skipping current channel %d\n",
4805                                      le16_to_cpu(priv->active_rxon.channel));
4806                                 continue;
4807                         }
4808                 } else if (priv->only_active_channel)
4809                         continue;
4810
4811                 scan_ch->channel = ieee80211_frequency_to_channel(channels[i].center_freq);
4812
4813                 ch_info = iwl_get_channel_info(priv, band,
4814                                          scan_ch->channel);
4815                 if (!is_channel_valid(ch_info)) {
4816                         IWL_DEBUG_SCAN("Channel %d is INVALID for this SKU.\n",
4817                                        scan_ch->channel);
4818                         continue;
4819                 }
4820
4821                 if (!is_active || is_channel_passive(ch_info) ||
4822                     (channels[i].flags & IEEE80211_CHAN_PASSIVE_SCAN))
4823                         scan_ch->type = 0;      /* passive */
4824                 else
4825                         scan_ch->type = 1;      /* active */
4826
4827                 if (scan_ch->type & 1)
4828                         scan_ch->type |= (direct_mask << 1);
4829
4830                 if (is_channel_narrow(ch_info))
4831                         scan_ch->type |= (1 << 7);
4832
4833                 scan_ch->active_dwell = cpu_to_le16(active_dwell);
4834                 scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
4835
4836                 /* Set txpower levels to defaults */
4837                 scan_ch->tpc.dsp_atten = 110;
4838                 /* scan_pwr_info->tpc.dsp_atten; */
4839
4840                 /*scan_pwr_info->tpc.tx_gain; */
4841                 if (band == IEEE80211_BAND_5GHZ)
4842                         scan_ch->tpc.tx_gain = ((1 << 5) | (3 << 3)) | 3;
4843                 else {
4844                         scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
4845                         /* NOTE: if we were doing 6Mb OFDM for scans we'd use
4846                          * power level:
4847                          * scan_ch->tpc.tx_gain = ((1 << 5) | (2 << 3)) | 3;
4848                          */
4849                 }
4850
4851                 IWL_DEBUG_SCAN("Scanning %d [%s %d]\n",
4852                                scan_ch->channel,
4853                                (scan_ch->type & 1) ? "ACTIVE" : "PASSIVE",
4854                                (scan_ch->type & 1) ?
4855                                active_dwell : passive_dwell);
4856
4857                 scan_ch++;
4858                 added++;
4859         }
4860
4861         IWL_DEBUG_SCAN("total channels to scan %d \n", added);
4862         return added;
4863 }
4864
4865 static void iwl4965_init_hw_rates(struct iwl_priv *priv,
4866                               struct ieee80211_rate *rates)
4867 {
4868         int i;
4869
4870         for (i = 0; i < IWL_RATE_COUNT; i++) {
4871                 rates[i].bitrate = iwl4965_rates[i].ieee * 5;
4872                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
4873                 rates[i].hw_value_short = i;
4874                 rates[i].flags = 0;
4875                 if ((i > IWL_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
4876                         /*
4877                          * If CCK != 1M then set short preamble rate flag.
4878                          */
4879                         rates[i].flags |=
4880                                 (iwl4965_rates[i].plcp == IWL_RATE_1M_PLCP) ?
4881                                         0 : IEEE80211_RATE_SHORT_PREAMBLE;
4882                 }
4883         }
4884 }
4885
4886 /**
4887  * iwl4965_init_geos - Initialize mac80211's geo/channel info based from eeprom
4888  */
4889 int iwl4965_init_geos(struct iwl_priv *priv)
4890 {
4891         struct iwl_channel_info *ch;
4892         struct ieee80211_supported_band *sband;
4893         struct ieee80211_channel *channels;
4894         struct ieee80211_channel *geo_ch;
4895         struct ieee80211_rate *rates;
4896         int i = 0;
4897
4898         if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
4899             priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
4900                 IWL_DEBUG_INFO("Geography modes already initialized.\n");
4901                 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
4902                 return 0;
4903         }
4904
4905         channels = kzalloc(sizeof(struct ieee80211_channel) *
4906                            priv->channel_count, GFP_KERNEL);
4907         if (!channels)
4908                 return -ENOMEM;
4909
4910         rates = kzalloc((sizeof(struct ieee80211_rate) * (IWL_RATE_COUNT + 1)),
4911                         GFP_KERNEL);
4912         if (!rates) {
4913                 kfree(channels);
4914                 return -ENOMEM;
4915         }
4916
4917         /* 5.2GHz channels start after the 2.4GHz channels */
4918         sband = &priv->bands[IEEE80211_BAND_5GHZ];
4919         sband->channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)];
4920         /* just OFDM */
4921         sband->bitrates = &rates[IWL_FIRST_OFDM_RATE];
4922         sband->n_bitrates = IWL_RATE_COUNT - IWL_FIRST_OFDM_RATE;
4923
4924         iwl4965_init_ht_hw_capab(priv, &sband->ht_info, IEEE80211_BAND_5GHZ);
4925
4926         sband = &priv->bands[IEEE80211_BAND_2GHZ];
4927         sband->channels = channels;
4928         /* OFDM & CCK */
4929         sband->bitrates = rates;
4930         sband->n_bitrates = IWL_RATE_COUNT;
4931
4932         iwl4965_init_ht_hw_capab(priv, &sband->ht_info, IEEE80211_BAND_2GHZ);
4933
4934         priv->ieee_channels = channels;
4935         priv->ieee_rates = rates;
4936
4937         iwl4965_init_hw_rates(priv, rates);
4938
4939         for (i = 0;  i < priv->channel_count; i++) {
4940                 ch = &priv->channel_info[i];
4941
4942                 /* FIXME: might be removed if scan is OK */
4943                 if (!is_channel_valid(ch))
4944                         continue;
4945
4946                 if (is_channel_a_band(ch))
4947                         sband =  &priv->bands[IEEE80211_BAND_5GHZ];
4948                 else
4949                         sband =  &priv->bands[IEEE80211_BAND_2GHZ];
4950
4951                 geo_ch = &sband->channels[sband->n_channels++];
4952
4953                 geo_ch->center_freq = ieee80211_channel_to_frequency(ch->channel);
4954                 geo_ch->max_power = ch->max_power_avg;
4955                 geo_ch->max_antenna_gain = 0xff;
4956                 geo_ch->hw_value = ch->channel;
4957
4958                 if (is_channel_valid(ch)) {
4959                         if (!(ch->flags & EEPROM_CHANNEL_IBSS))
4960                                 geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
4961
4962                         if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
4963                                 geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
4964
4965                         if (ch->flags & EEPROM_CHANNEL_RADAR)
4966                                 geo_ch->flags |= IEEE80211_CHAN_RADAR;
4967
4968                         if (ch->max_power_avg > priv->max_channel_txpower_limit)
4969                                 priv->max_channel_txpower_limit =
4970                                     ch->max_power_avg;
4971                 } else {
4972                         geo_ch->flags |= IEEE80211_CHAN_DISABLED;
4973                 }
4974
4975                 /* Save flags for reg domain usage */
4976                 geo_ch->orig_flags = geo_ch->flags;
4977
4978                 IWL_DEBUG_INFO("Channel %d Freq=%d[%sGHz] %s flag=0%X\n",
4979                                 ch->channel, geo_ch->center_freq,
4980                                 is_channel_a_band(ch) ?  "5.2" : "2.4",
4981                                 geo_ch->flags & IEEE80211_CHAN_DISABLED ?
4982                                 "restricted" : "valid",
4983                                  geo_ch->flags);
4984         }
4985
4986         if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) &&
4987              priv->cfg->sku & IWL_SKU_A) {
4988                 printk(KERN_INFO DRV_NAME
4989                        ": Incorrectly detected BG card as ABG.  Please send "
4990                        "your PCI ID 0x%04X:0x%04X to maintainer.\n",
4991                        priv->pci_dev->device, priv->pci_dev->subsystem_device);
4992                 priv->cfg->sku &= ~IWL_SKU_A;
4993         }
4994
4995         printk(KERN_INFO DRV_NAME
4996                ": Tunable channels: %d 802.11bg, %d 802.11a channels\n",
4997                priv->bands[IEEE80211_BAND_2GHZ].n_channels,
4998                priv->bands[IEEE80211_BAND_5GHZ].n_channels);
4999
5000         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
5001                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
5002                         &priv->bands[IEEE80211_BAND_2GHZ];
5003         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
5004                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
5005                         &priv->bands[IEEE80211_BAND_5GHZ];
5006
5007         set_bit(STATUS_GEO_CONFIGURED, &priv->status);
5008
5009         return 0;
5010 }
5011
5012 /*
5013  * iwl4965_free_geos - undo allocations in iwl4965_init_geos
5014  */
5015 void iwl4965_free_geos(struct iwl_priv *priv)
5016 {
5017         kfree(priv->ieee_channels);
5018         kfree(priv->ieee_rates);
5019         clear_bit(STATUS_GEO_CONFIGURED, &priv->status);
5020 }
5021
5022 /******************************************************************************
5023  *
5024  * uCode download functions
5025  *
5026  ******************************************************************************/
5027
5028 static void iwl4965_dealloc_ucode_pci(struct iwl_priv *priv)
5029 {
5030         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
5031         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
5032         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
5033         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
5034         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
5035         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
5036 }
5037
5038 /**
5039  * iwl4965_verify_inst_full - verify runtime uCode image in card vs. host,
5040  *     looking at all data.
5041  */
5042 static int iwl4965_verify_inst_full(struct iwl_priv *priv, __le32 *image,
5043                                  u32 len)
5044 {
5045         u32 val;
5046         u32 save_len = len;
5047         int rc = 0;
5048         u32 errcnt;
5049
5050         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
5051
5052         rc = iwl_grab_nic_access(priv);
5053         if (rc)
5054                 return rc;
5055
5056         iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR, RTC_INST_LOWER_BOUND);
5057
5058         errcnt = 0;
5059         for (; len > 0; len -= sizeof(u32), image++) {
5060                 /* read data comes through single port, auto-incr addr */
5061                 /* NOTE: Use the debugless read so we don't flood kernel log
5062                  * if IWL_DL_IO is set */
5063                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
5064                 if (val != le32_to_cpu(*image)) {
5065                         IWL_ERROR("uCode INST section is invalid at "
5066                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
5067                                   save_len - len, val, le32_to_cpu(*image));
5068                         rc = -EIO;
5069                         errcnt++;
5070                         if (errcnt >= 20)
5071                                 break;
5072                 }
5073         }
5074
5075         iwl_release_nic_access(priv);
5076
5077         if (!errcnt)
5078                 IWL_DEBUG_INFO
5079                     ("ucode image in INSTRUCTION memory is good\n");
5080
5081         return rc;
5082 }
5083
5084
5085 /**
5086  * iwl4965_verify_inst_sparse - verify runtime uCode image in card vs. host,
5087  *   using sample data 100 bytes apart.  If these sample points are good,
5088  *   it's a pretty good bet that everything between them is good, too.
5089  */
5090 static int iwl4965_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
5091 {
5092         u32 val;
5093         int rc = 0;
5094         u32 errcnt = 0;
5095         u32 i;
5096
5097         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
5098
5099         rc = iwl_grab_nic_access(priv);
5100         if (rc)
5101                 return rc;
5102
5103         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
5104                 /* read data comes through single port, auto-incr addr */
5105                 /* NOTE: Use the debugless read so we don't flood kernel log
5106                  * if IWL_DL_IO is set */
5107                 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
5108                         i + RTC_INST_LOWER_BOUND);
5109                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
5110                 if (val != le32_to_cpu(*image)) {
5111 #if 0 /* Enable this if you want to see details */
5112                         IWL_ERROR("uCode INST section is invalid at "
5113                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
5114                                   i, val, *image);
5115 #endif
5116                         rc = -EIO;
5117                         errcnt++;
5118                         if (errcnt >= 3)
5119                                 break;
5120                 }
5121         }
5122
5123         iwl_release_nic_access(priv);
5124
5125         return rc;
5126 }
5127
5128
5129 /**
5130  * iwl4965_verify_ucode - determine which instruction image is in SRAM,
5131  *    and verify its contents
5132  */
5133 static int iwl4965_verify_ucode(struct iwl_priv *priv)
5134 {
5135         __le32 *image;
5136         u32 len;
5137         int rc = 0;
5138
5139         /* Try bootstrap */
5140         image = (__le32 *)priv->ucode_boot.v_addr;
5141         len = priv->ucode_boot.len;
5142         rc = iwl4965_verify_inst_sparse(priv, image, len);
5143         if (rc == 0) {
5144                 IWL_DEBUG_INFO("Bootstrap uCode is good in inst SRAM\n");
5145                 return 0;
5146         }
5147
5148         /* Try initialize */
5149         image = (__le32 *)priv->ucode_init.v_addr;
5150         len = priv->ucode_init.len;
5151         rc = iwl4965_verify_inst_sparse(priv, image, len);
5152         if (rc == 0) {
5153                 IWL_DEBUG_INFO("Initialize uCode is good in inst SRAM\n");
5154                 return 0;
5155         }
5156
5157         /* Try runtime/protocol */
5158         image = (__le32 *)priv->ucode_code.v_addr;
5159         len = priv->ucode_code.len;
5160         rc = iwl4965_verify_inst_sparse(priv, image, len);
5161         if (rc == 0) {
5162                 IWL_DEBUG_INFO("Runtime uCode is good in inst SRAM\n");
5163                 return 0;
5164         }
5165
5166         IWL_ERROR("NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
5167
5168         /* Since nothing seems to match, show first several data entries in
5169          * instruction SRAM, so maybe visual inspection will give a clue.
5170          * Selection of bootstrap image (vs. other images) is arbitrary. */
5171         image = (__le32 *)priv->ucode_boot.v_addr;
5172         len = priv->ucode_boot.len;
5173         rc = iwl4965_verify_inst_full(priv, image, len);
5174
5175         return rc;
5176 }
5177
5178 static void iwl4965_nic_start(struct iwl_priv *priv)
5179 {
5180         /* Remove all resets to allow NIC to operate */
5181         iwl_write32(priv, CSR_RESET, 0);
5182 }
5183
5184
5185 /**
5186  * iwl4965_read_ucode - Read uCode images from disk file.
5187  *
5188  * Copy into buffers for card to fetch via bus-mastering
5189  */
5190 static int iwl4965_read_ucode(struct iwl_priv *priv)
5191 {
5192         struct iwl4965_ucode *ucode;
5193         int ret;
5194         const struct firmware *ucode_raw;
5195         const char *name = priv->cfg->fw_name;
5196         u8 *src;
5197         size_t len;
5198         u32 ver, inst_size, data_size, init_size, init_data_size, boot_size;
5199
5200         /* Ask kernel firmware_class module to get the boot firmware off disk.
5201          * request_firmware() is synchronous, file is in memory on return. */
5202         ret = request_firmware(&ucode_raw, name, &priv->pci_dev->dev);
5203         if (ret < 0) {
5204                 IWL_ERROR("%s firmware file req failed: Reason %d\n",
5205                                         name, ret);
5206                 goto error;
5207         }
5208
5209         IWL_DEBUG_INFO("Got firmware '%s' file (%zd bytes) from disk\n",
5210                        name, ucode_raw->size);
5211
5212         /* Make sure that we got at least our header! */
5213         if (ucode_raw->size < sizeof(*ucode)) {
5214                 IWL_ERROR("File size way too small!\n");
5215                 ret = -EINVAL;
5216                 goto err_release;
5217         }
5218
5219         /* Data from ucode file:  header followed by uCode images */
5220         ucode = (void *)ucode_raw->data;
5221
5222         ver = le32_to_cpu(ucode->ver);
5223         inst_size = le32_to_cpu(ucode->inst_size);
5224         data_size = le32_to_cpu(ucode->data_size);
5225         init_size = le32_to_cpu(ucode->init_size);
5226         init_data_size = le32_to_cpu(ucode->init_data_size);
5227         boot_size = le32_to_cpu(ucode->boot_size);
5228
5229         IWL_DEBUG_INFO("f/w package hdr ucode version = 0x%x\n", ver);
5230         IWL_DEBUG_INFO("f/w package hdr runtime inst size = %u\n",
5231                        inst_size);
5232         IWL_DEBUG_INFO("f/w package hdr runtime data size = %u\n",
5233                        data_size);
5234         IWL_DEBUG_INFO("f/w package hdr init inst size = %u\n",
5235                        init_size);
5236         IWL_DEBUG_INFO("f/w package hdr init data size = %u\n",
5237                        init_data_size);
5238         IWL_DEBUG_INFO("f/w package hdr boot inst size = %u\n",
5239                        boot_size);
5240
5241         /* Verify size of file vs. image size info in file's header */
5242         if (ucode_raw->size < sizeof(*ucode) +
5243                 inst_size + data_size + init_size +
5244                 init_data_size + boot_size) {
5245
5246                 IWL_DEBUG_INFO("uCode file size %d too small\n",
5247                                (int)ucode_raw->size);
5248                 ret = -EINVAL;
5249                 goto err_release;
5250         }
5251
5252         /* Verify that uCode images will fit in card's SRAM */
5253         if (inst_size > IWL_MAX_INST_SIZE) {
5254                 IWL_DEBUG_INFO("uCode instr len %d too large to fit in\n",
5255                                inst_size);
5256                 ret = -EINVAL;
5257                 goto err_release;
5258         }
5259
5260         if (data_size > IWL_MAX_DATA_SIZE) {
5261                 IWL_DEBUG_INFO("uCode data len %d too large to fit in\n",
5262                                 data_size);
5263                 ret = -EINVAL;
5264                 goto err_release;
5265         }
5266         if (init_size > IWL_MAX_INST_SIZE) {
5267                 IWL_DEBUG_INFO
5268                     ("uCode init instr len %d too large to fit in\n",
5269                       init_size);
5270                 ret = -EINVAL;
5271                 goto err_release;
5272         }
5273         if (init_data_size > IWL_MAX_DATA_SIZE) {
5274                 IWL_DEBUG_INFO
5275                     ("uCode init data len %d too large to fit in\n",
5276                       init_data_size);
5277                 ret = -EINVAL;
5278                 goto err_release;
5279         }
5280         if (boot_size > IWL_MAX_BSM_SIZE) {
5281                 IWL_DEBUG_INFO
5282                     ("uCode boot instr len %d too large to fit in\n",
5283                       boot_size);
5284                 ret = -EINVAL;
5285                 goto err_release;
5286         }
5287
5288         /* Allocate ucode buffers for card's bus-master loading ... */
5289
5290         /* Runtime instructions and 2 copies of data:
5291          * 1) unmodified from disk
5292          * 2) backup cache for save/restore during power-downs */
5293         priv->ucode_code.len = inst_size;
5294         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
5295
5296         priv->ucode_data.len = data_size;
5297         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
5298
5299         priv->ucode_data_backup.len = data_size;
5300         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
5301
5302         /* Initialization instructions and data */
5303         if (init_size && init_data_size) {
5304                 priv->ucode_init.len = init_size;
5305                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
5306
5307                 priv->ucode_init_data.len = init_data_size;
5308                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
5309
5310                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
5311                         goto err_pci_alloc;
5312         }
5313
5314         /* Bootstrap (instructions only, no data) */
5315         if (boot_size) {
5316                 priv->ucode_boot.len = boot_size;
5317                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
5318
5319                 if (!priv->ucode_boot.v_addr)
5320                         goto err_pci_alloc;
5321         }
5322
5323         /* Copy images into buffers for card's bus-master reads ... */
5324
5325         /* Runtime instructions (first block of data in file) */
5326         src = &ucode->data[0];
5327         len = priv->ucode_code.len;
5328         IWL_DEBUG_INFO("Copying (but not loading) uCode instr len %Zd\n", len);
5329         memcpy(priv->ucode_code.v_addr, src, len);
5330         IWL_DEBUG_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
5331                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
5332
5333         /* Runtime data (2nd block)
5334          * NOTE:  Copy into backup buffer will be done in iwl4965_up()  */
5335         src = &ucode->data[inst_size];
5336         len = priv->ucode_data.len;
5337         IWL_DEBUG_INFO("Copying (but not loading) uCode data len %Zd\n", len);
5338         memcpy(priv->ucode_data.v_addr, src, len);
5339         memcpy(priv->ucode_data_backup.v_addr, src, len);
5340
5341         /* Initialization instructions (3rd block) */
5342         if (init_size) {
5343                 src = &ucode->data[inst_size + data_size];
5344                 len = priv->ucode_init.len;
5345                 IWL_DEBUG_INFO("Copying (but not loading) init instr len %Zd\n",
5346                                 len);
5347                 memcpy(priv->ucode_init.v_addr, src, len);
5348         }
5349
5350         /* Initialization data (4th block) */
5351         if (init_data_size) {
5352                 src = &ucode->data[inst_size + data_size + init_size];
5353                 len = priv->ucode_init_data.len;
5354                 IWL_DEBUG_INFO("Copying (but not loading) init data len %Zd\n",
5355                                len);
5356                 memcpy(priv->ucode_init_data.v_addr, src, len);
5357         }
5358
5359         /* Bootstrap instructions (5th block) */
5360         src = &ucode->data[inst_size + data_size + init_size + init_data_size];
5361         len = priv->ucode_boot.len;
5362         IWL_DEBUG_INFO("Copying (but not loading) boot instr len %Zd\n", len);
5363         memcpy(priv->ucode_boot.v_addr, src, len);
5364
5365         /* We have our copies now, allow OS release its copies */
5366         release_firmware(ucode_raw);
5367         return 0;
5368
5369  err_pci_alloc:
5370         IWL_ERROR("failed to allocate pci memory\n");
5371         ret = -ENOMEM;
5372         iwl4965_dealloc_ucode_pci(priv);
5373
5374  err_release:
5375         release_firmware(ucode_raw);
5376
5377  error:
5378         return ret;
5379 }
5380
5381
5382 /**
5383  * iwl4965_set_ucode_ptrs - Set uCode address location
5384  *
5385  * Tell initialization uCode where to find runtime uCode.
5386  *
5387  * BSM registers initially contain pointers to initialization uCode.
5388  * We need to replace them to load runtime uCode inst and data,
5389  * and to save runtime data when powering down.
5390  */
5391 static int iwl4965_set_ucode_ptrs(struct iwl_priv *priv)
5392 {
5393         dma_addr_t pinst;
5394         dma_addr_t pdata;
5395         int rc = 0;
5396         unsigned long flags;
5397
5398         /* bits 35:4 for 4965 */
5399         pinst = priv->ucode_code.p_addr >> 4;
5400         pdata = priv->ucode_data_backup.p_addr >> 4;
5401
5402         spin_lock_irqsave(&priv->lock, flags);
5403         rc = iwl_grab_nic_access(priv);
5404         if (rc) {
5405                 spin_unlock_irqrestore(&priv->lock, flags);
5406                 return rc;
5407         }
5408
5409         /* Tell bootstrap uCode where to find image to load */
5410         iwl_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
5411         iwl_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
5412         iwl_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
5413                                  priv->ucode_data.len);
5414
5415         /* Inst bytecount must be last to set up, bit 31 signals uCode
5416          *   that all new ptr/size info is in place */
5417         iwl_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
5418                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
5419
5420         iwl_release_nic_access(priv);
5421
5422         spin_unlock_irqrestore(&priv->lock, flags);
5423
5424         IWL_DEBUG_INFO("Runtime uCode pointers are set.\n");
5425
5426         return rc;
5427 }
5428
5429 /**
5430  * iwl4965_init_alive_start - Called after REPLY_ALIVE notification received
5431  *
5432  * Called after REPLY_ALIVE notification received from "initialize" uCode.
5433  *
5434  * The 4965 "initialize" ALIVE reply contains calibration data for:
5435  *   Voltage, temperature, and MIMO tx gain correction, now stored in priv
5436  *   (3945 does not contain this data).
5437  *
5438  * Tell "initialize" uCode to go ahead and load the runtime uCode.
5439 */
5440 static void iwl4965_init_alive_start(struct iwl_priv *priv)
5441 {
5442         /* Check alive response for "valid" sign from uCode */
5443         if (priv->card_alive_init.is_valid != UCODE_VALID_OK) {
5444                 /* We had an error bringing up the hardware, so take it
5445                  * all the way back down so we can try again */
5446                 IWL_DEBUG_INFO("Initialize Alive failed.\n");
5447                 goto restart;
5448         }
5449
5450         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
5451          * This is a paranoid check, because we would not have gotten the
5452          * "initialize" alive if code weren't properly loaded.  */
5453         if (iwl4965_verify_ucode(priv)) {
5454                 /* Runtime instruction load was bad;
5455                  * take it all the way back down so we can try again */
5456                 IWL_DEBUG_INFO("Bad \"initialize\" uCode load.\n");
5457                 goto restart;
5458         }
5459
5460         /* Calculate temperature */
5461         priv->temperature = iwl4965_get_temperature(priv);
5462
5463         /* Send pointers to protocol/runtime uCode image ... init code will
5464          * load and launch runtime uCode, which will send us another "Alive"
5465          * notification. */
5466         IWL_DEBUG_INFO("Initialization Alive received.\n");
5467         if (iwl4965_set_ucode_ptrs(priv)) {
5468                 /* Runtime instruction load won't happen;
5469                  * take it all the way back down so we can try again */
5470                 IWL_DEBUG_INFO("Couldn't set up uCode pointers.\n");
5471                 goto restart;
5472         }
5473         return;
5474
5475  restart:
5476         queue_work(priv->workqueue, &priv->restart);
5477 }
5478
5479
5480 /**
5481  * iwl4965_alive_start - called after REPLY_ALIVE notification received
5482  *                   from protocol/runtime uCode (initialization uCode's
5483  *                   Alive gets handled by iwl4965_init_alive_start()).
5484  */
5485 static void iwl4965_alive_start(struct iwl_priv *priv)
5486 {
5487         int ret = 0;
5488
5489         IWL_DEBUG_INFO("Runtime Alive received.\n");
5490
5491         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
5492                 /* We had an error bringing up the hardware, so take it
5493                  * all the way back down so we can try again */
5494                 IWL_DEBUG_INFO("Alive failed.\n");
5495                 goto restart;
5496         }
5497
5498         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
5499          * This is a paranoid check, because we would not have gotten the
5500          * "runtime" alive if code weren't properly loaded.  */
5501         if (iwl4965_verify_ucode(priv)) {
5502                 /* Runtime instruction load was bad;
5503                  * take it all the way back down so we can try again */
5504                 IWL_DEBUG_INFO("Bad runtime uCode load.\n");
5505                 goto restart;
5506         }
5507
5508         iwlcore_clear_stations_table(priv);
5509
5510         ret = priv->cfg->ops->lib->alive_notify(priv);
5511         if (ret) {
5512                 IWL_WARNING("Could not complete ALIVE transition [ntf]: %d\n",
5513                             ret);
5514                 goto restart;
5515         }
5516
5517         /* After the ALIVE response, we can send host commands to 4965 uCode */
5518         set_bit(STATUS_ALIVE, &priv->status);
5519
5520         /* Clear out the uCode error bit if it is set */
5521         clear_bit(STATUS_FW_ERROR, &priv->status);
5522
5523         if (iwl_is_rfkill(priv))
5524                 return;
5525
5526         ieee80211_start_queues(priv->hw);
5527
5528         priv->active_rate = priv->rates_mask;
5529         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
5530
5531         iwl4965_send_power_mode(priv, IWL_POWER_LEVEL(priv->power_mode));
5532
5533         if (iwl_is_associated(priv)) {
5534                 struct iwl4965_rxon_cmd *active_rxon =
5535                                 (struct iwl4965_rxon_cmd *)(&priv->active_rxon);
5536
5537                 memcpy(&priv->staging_rxon, &priv->active_rxon,
5538                        sizeof(priv->staging_rxon));
5539                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5540         } else {
5541                 /* Initialize our rx_config data */
5542                 iwl4965_connection_init_rx_config(priv);
5543                 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
5544         }
5545
5546         /* Configure Bluetooth device coexistence support */
5547         iwl4965_send_bt_config(priv);
5548
5549         /* Configure the adapter for unassociated operation */
5550         iwl4965_commit_rxon(priv);
5551
5552         /* At this point, the NIC is initialized and operational */
5553         priv->notif_missed_beacons = 0;
5554
5555         iwl4965_rf_kill_ct_config(priv);
5556
5557         iwl_leds_register(priv);
5558
5559         IWL_DEBUG_INFO("ALIVE processing complete.\n");
5560         set_bit(STATUS_READY, &priv->status);
5561         wake_up_interruptible(&priv->wait_command_queue);
5562
5563         if (priv->error_recovering)
5564                 iwl4965_error_recovery(priv);
5565
5566         iwlcore_low_level_notify(priv, IWLCORE_START_EVT);
5567         ieee80211_notify_mac(priv->hw, IEEE80211_NOTIFY_RE_ASSOC);
5568         return;
5569
5570  restart:
5571         queue_work(priv->workqueue, &priv->restart);
5572 }
5573
5574 static void iwl4965_cancel_deferred_work(struct iwl_priv *priv);
5575
5576 static void __iwl4965_down(struct iwl_priv *priv)
5577 {
5578         unsigned long flags;
5579         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
5580         struct ieee80211_conf *conf = NULL;
5581
5582         IWL_DEBUG_INFO(DRV_NAME " is going down\n");
5583
5584         conf = ieee80211_get_hw_conf(priv->hw);
5585
5586         if (!exit_pending)
5587                 set_bit(STATUS_EXIT_PENDING, &priv->status);
5588
5589         iwl_leds_unregister(priv);
5590
5591         iwlcore_low_level_notify(priv, IWLCORE_STOP_EVT);
5592
5593         iwlcore_clear_stations_table(priv);
5594
5595         /* Unblock any waiting calls */
5596         wake_up_interruptible_all(&priv->wait_command_queue);
5597
5598         /* Wipe out the EXIT_PENDING status bit if we are not actually
5599          * exiting the module */
5600         if (!exit_pending)
5601                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
5602
5603         /* stop and reset the on-board processor */
5604         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
5605
5606         /* tell the device to stop sending interrupts */
5607         spin_lock_irqsave(&priv->lock, flags);
5608         iwl4965_disable_interrupts(priv);
5609         spin_unlock_irqrestore(&priv->lock, flags);
5610         iwl_synchronize_irq(priv);
5611
5612         if (priv->mac80211_registered)
5613                 ieee80211_stop_queues(priv->hw);
5614
5615         /* If we have not previously called iwl4965_init() then
5616          * clear all bits but the RF Kill and SUSPEND bits and return */
5617         if (!iwl_is_init(priv)) {
5618                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
5619                                         STATUS_RF_KILL_HW |
5620                                test_bit(STATUS_RF_KILL_SW, &priv->status) <<
5621                                         STATUS_RF_KILL_SW |
5622                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
5623                                         STATUS_GEO_CONFIGURED |
5624                                test_bit(STATUS_IN_SUSPEND, &priv->status) <<
5625                                         STATUS_IN_SUSPEND;
5626                 goto exit;
5627         }
5628
5629         /* ...otherwise clear out all the status bits but the RF Kill and
5630          * SUSPEND bits and continue taking the NIC down. */
5631         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
5632                                 STATUS_RF_KILL_HW |
5633                         test_bit(STATUS_RF_KILL_SW, &priv->status) <<
5634                                 STATUS_RF_KILL_SW |
5635                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
5636                                 STATUS_GEO_CONFIGURED |
5637                         test_bit(STATUS_IN_SUSPEND, &priv->status) <<
5638                                 STATUS_IN_SUSPEND |
5639                         test_bit(STATUS_FW_ERROR, &priv->status) <<
5640                                 STATUS_FW_ERROR;
5641
5642         spin_lock_irqsave(&priv->lock, flags);
5643         iwl_clear_bit(priv, CSR_GP_CNTRL,
5644                          CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
5645         spin_unlock_irqrestore(&priv->lock, flags);
5646
5647         iwl4965_hw_txq_ctx_stop(priv);
5648         iwl4965_hw_rxq_stop(priv);
5649
5650         spin_lock_irqsave(&priv->lock, flags);
5651         if (!iwl_grab_nic_access(priv)) {
5652                 iwl_write_prph(priv, APMG_CLK_DIS_REG,
5653                                          APMG_CLK_VAL_DMA_CLK_RQT);
5654                 iwl_release_nic_access(priv);
5655         }
5656         spin_unlock_irqrestore(&priv->lock, flags);
5657
5658         udelay(5);
5659
5660         iwl4965_hw_nic_stop_master(priv);
5661         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
5662         iwl4965_hw_nic_reset(priv);
5663
5664  exit:
5665         memset(&priv->card_alive, 0, sizeof(struct iwl4965_alive_resp));
5666
5667         if (priv->ibss_beacon)
5668                 dev_kfree_skb(priv->ibss_beacon);
5669         priv->ibss_beacon = NULL;
5670
5671         /* clear out any free frames */
5672         iwl4965_clear_free_frames(priv);
5673 }
5674
5675 static void iwl4965_down(struct iwl_priv *priv)
5676 {
5677         mutex_lock(&priv->mutex);
5678         __iwl4965_down(priv);
5679         mutex_unlock(&priv->mutex);
5680
5681         iwl4965_cancel_deferred_work(priv);
5682 }
5683
5684 #define MAX_HW_RESTARTS 5
5685
5686 static int __iwl4965_up(struct iwl_priv *priv)
5687 {
5688         int i;
5689         int ret;
5690
5691         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
5692                 IWL_WARNING("Exit pending; will not bring the NIC up\n");
5693                 return -EIO;
5694         }
5695
5696         if (test_bit(STATUS_RF_KILL_SW, &priv->status)) {
5697                 IWL_WARNING("Radio disabled by SW RF kill (module "
5698                             "parameter)\n");
5699                 iwl_rfkill_set_hw_state(priv);
5700                 return -ENODEV;
5701         }
5702
5703         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
5704                 IWL_ERROR("ucode not available for device bringup\n");
5705                 return -EIO;
5706         }
5707
5708         /* If platform's RF_KILL switch is NOT set to KILL */
5709         if (iwl_read32(priv, CSR_GP_CNTRL) &
5710                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
5711                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
5712         else {
5713                 set_bit(STATUS_RF_KILL_HW, &priv->status);
5714                 if (!test_bit(STATUS_IN_SUSPEND, &priv->status)) {
5715                         iwl_rfkill_set_hw_state(priv);
5716                         IWL_WARNING("Radio disabled by HW RF Kill switch\n");
5717                         return -ENODEV;
5718                 }
5719         }
5720
5721         iwl_rfkill_set_hw_state(priv);
5722         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
5723
5724         ret = priv->cfg->ops->lib->hw_nic_init(priv);
5725         if (ret) {
5726                 IWL_ERROR("Unable to init nic\n");
5727                 return ret;
5728         }
5729
5730         /* make sure rfkill handshake bits are cleared */
5731         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
5732         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
5733                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
5734
5735         /* clear (again), then enable host interrupts */
5736         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
5737         iwl4965_enable_interrupts(priv);
5738
5739         /* really make sure rfkill handshake bits are cleared */
5740         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
5741         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
5742
5743         /* Copy original ucode data image from disk into backup cache.
5744          * This will be used to initialize the on-board processor's
5745          * data SRAM for a clean start when the runtime program first loads. */
5746         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
5747                priv->ucode_data.len);
5748
5749         /* We return success when we resume from suspend and rf_kill is on. */
5750         if (test_bit(STATUS_RF_KILL_HW, &priv->status))
5751                 return 0;
5752
5753         for (i = 0; i < MAX_HW_RESTARTS; i++) {
5754
5755                 iwlcore_clear_stations_table(priv);
5756
5757                 /* load bootstrap state machine,
5758                  * load bootstrap program into processor's memory,
5759                  * prepare to load the "initialize" uCode */
5760                 ret = priv->cfg->ops->lib->load_ucode(priv);
5761
5762                 if (ret) {
5763                         IWL_ERROR("Unable to set up bootstrap uCode: %d\n", ret);
5764                         continue;
5765                 }
5766
5767                 /* start card; "initialize" will load runtime ucode */
5768                 iwl4965_nic_start(priv);
5769
5770                 IWL_DEBUG_INFO(DRV_NAME " is coming up\n");
5771
5772                 return 0;
5773         }
5774
5775         set_bit(STATUS_EXIT_PENDING, &priv->status);
5776         __iwl4965_down(priv);
5777
5778         /* tried to restart and config the device for as long as our
5779          * patience could withstand */
5780         IWL_ERROR("Unable to initialize device after %d attempts.\n", i);
5781         return -EIO;
5782 }
5783
5784
5785 /*****************************************************************************
5786  *
5787  * Workqueue callbacks
5788  *
5789  *****************************************************************************/
5790
5791 static void iwl4965_bg_init_alive_start(struct work_struct *data)
5792 {
5793         struct iwl_priv *priv =
5794             container_of(data, struct iwl_priv, init_alive_start.work);
5795
5796         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5797                 return;
5798
5799         mutex_lock(&priv->mutex);
5800         iwl4965_init_alive_start(priv);
5801         mutex_unlock(&priv->mutex);
5802 }
5803
5804 static void iwl4965_bg_alive_start(struct work_struct *data)
5805 {
5806         struct iwl_priv *priv =
5807             container_of(data, struct iwl_priv, alive_start.work);
5808
5809         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5810                 return;
5811
5812         mutex_lock(&priv->mutex);
5813         iwl4965_alive_start(priv);
5814         mutex_unlock(&priv->mutex);
5815 }
5816
5817 static void iwl4965_bg_rf_kill(struct work_struct *work)
5818 {
5819         struct iwl_priv *priv = container_of(work, struct iwl_priv, rf_kill);
5820
5821         wake_up_interruptible(&priv->wait_command_queue);
5822
5823         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5824                 return;
5825
5826         mutex_lock(&priv->mutex);
5827
5828         if (!iwl_is_rfkill(priv)) {
5829                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_RF_KILL,
5830                           "HW and/or SW RF Kill no longer active, restarting "
5831                           "device\n");
5832                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
5833                         queue_work(priv->workqueue, &priv->restart);
5834         } else {
5835                 /* make sure mac80211 stop sending Tx frame */
5836                 if (priv->mac80211_registered)
5837                         ieee80211_stop_queues(priv->hw);
5838
5839                 if (!test_bit(STATUS_RF_KILL_HW, &priv->status))
5840                         IWL_DEBUG_RF_KILL("Can not turn radio back on - "
5841                                           "disabled by SW switch\n");
5842                 else
5843                         IWL_WARNING("Radio Frequency Kill Switch is On:\n"
5844                                     "Kill switch must be turned off for "
5845                                     "wireless networking to work.\n");
5846         }
5847         iwl_rfkill_set_hw_state(priv);
5848
5849         mutex_unlock(&priv->mutex);
5850 }
5851
5852 #define IWL_SCAN_CHECK_WATCHDOG (7 * HZ)
5853
5854 static void iwl4965_bg_scan_check(struct work_struct *data)
5855 {
5856         struct iwl_priv *priv =
5857             container_of(data, struct iwl_priv, scan_check.work);
5858
5859         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
5860                 return;
5861
5862         mutex_lock(&priv->mutex);
5863         if (test_bit(STATUS_SCANNING, &priv->status) ||
5864             test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
5865                 IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN,
5866                           "Scan completion watchdog resetting adapter (%dms)\n",
5867                           jiffies_to_msecs(IWL_SCAN_CHECK_WATCHDOG));
5868
5869                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
5870                         iwl4965_send_scan_abort(priv);
5871         }
5872         mutex_unlock(&priv->mutex);
5873 }
5874
5875 static void iwl4965_bg_request_scan(struct work_struct *data)
5876 {
5877         struct iwl_priv *priv =
5878             container_of(data, struct iwl_priv, request_scan);
5879         struct iwl_host_cmd cmd = {
5880                 .id = REPLY_SCAN_CMD,
5881                 .len = sizeof(struct iwl4965_scan_cmd),
5882                 .meta.flags = CMD_SIZE_HUGE,
5883         };
5884         struct iwl4965_scan_cmd *scan;
5885         struct ieee80211_conf *conf = NULL;
5886         u16 cmd_len;
5887         enum ieee80211_band band;
5888         u8 direct_mask;
5889         int ret = 0;
5890
5891         conf = ieee80211_get_hw_conf(priv->hw);
5892
5893         mutex_lock(&priv->mutex);
5894
5895         if (!iwl_is_ready(priv)) {
5896                 IWL_WARNING("request scan called when driver not ready.\n");
5897                 goto done;
5898         }
5899
5900         /* Make sure the scan wasn't cancelled before this queued work
5901          * was given the chance to run... */
5902         if (!test_bit(STATUS_SCANNING, &priv->status))
5903                 goto done;
5904
5905         /* This should never be called or scheduled if there is currently
5906          * a scan active in the hardware. */
5907         if (test_bit(STATUS_SCAN_HW, &priv->status)) {
5908                 IWL_DEBUG_INFO("Multiple concurrent scan requests in parallel. "
5909                                "Ignoring second request.\n");
5910                 ret = -EIO;
5911                 goto done;
5912         }
5913
5914         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
5915                 IWL_DEBUG_SCAN("Aborting scan due to device shutdown\n");
5916                 goto done;
5917         }
5918
5919         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
5920                 IWL_DEBUG_HC("Scan request while abort pending.  Queuing.\n");
5921                 goto done;
5922         }
5923
5924         if (iwl_is_rfkill(priv)) {
5925                 IWL_DEBUG_HC("Aborting scan due to RF Kill activation\n");
5926                 goto done;
5927         }
5928
5929         if (!test_bit(STATUS_READY, &priv->status)) {
5930                 IWL_DEBUG_HC("Scan request while uninitialized.  Queuing.\n");
5931                 goto done;
5932         }
5933
5934         if (!priv->scan_bands) {
5935                 IWL_DEBUG_HC("Aborting scan due to no requested bands\n");
5936                 goto done;
5937         }
5938
5939         if (!priv->scan) {
5940                 priv->scan = kmalloc(sizeof(struct iwl4965_scan_cmd) +
5941                                      IWL_MAX_SCAN_SIZE, GFP_KERNEL);
5942                 if (!priv->scan) {
5943                         ret = -ENOMEM;
5944                         goto done;
5945                 }
5946         }
5947         scan = priv->scan;
5948         memset(scan, 0, sizeof(struct iwl4965_scan_cmd) + IWL_MAX_SCAN_SIZE);
5949
5950         scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH;
5951         scan->quiet_time = IWL_ACTIVE_QUIET_TIME;
5952
5953         if (iwl_is_associated(priv)) {
5954                 u16 interval = 0;
5955                 u32 extra;
5956                 u32 suspend_time = 100;
5957                 u32 scan_suspend_time = 100;
5958                 unsigned long flags;
5959
5960                 IWL_DEBUG_INFO("Scanning while associated...\n");
5961
5962                 spin_lock_irqsave(&priv->lock, flags);
5963                 interval = priv->beacon_int;
5964                 spin_unlock_irqrestore(&priv->lock, flags);
5965
5966                 scan->suspend_time = 0;
5967                 scan->max_out_time = cpu_to_le32(200 * 1024);
5968                 if (!interval)
5969                         interval = suspend_time;
5970
5971                 extra = (suspend_time / interval) << 22;
5972                 scan_suspend_time = (extra |
5973                     ((suspend_time % interval) * 1024));
5974                 scan->suspend_time = cpu_to_le32(scan_suspend_time);
5975                 IWL_DEBUG_SCAN("suspend_time 0x%X beacon interval %d\n",
5976                                scan_suspend_time, interval);
5977         }
5978
5979         /* We should add the ability for user to lock to PASSIVE ONLY */
5980         if (priv->one_direct_scan) {
5981                 IWL_DEBUG_SCAN
5982                     ("Kicking off one direct scan for '%s'\n",
5983                      iwl4965_escape_essid(priv->direct_ssid,
5984                                       priv->direct_ssid_len));
5985                 scan->direct_scan[0].id = WLAN_EID_SSID;
5986                 scan->direct_scan[0].len = priv->direct_ssid_len;
5987                 memcpy(scan->direct_scan[0].ssid,
5988                        priv->direct_ssid, priv->direct_ssid_len);
5989                 direct_mask = 1;
5990         } else if (!iwl_is_associated(priv) && priv->essid_len) {
5991                 scan->direct_scan[0].id = WLAN_EID_SSID;
5992                 scan->direct_scan[0].len = priv->essid_len;
5993                 memcpy(scan->direct_scan[0].ssid, priv->essid, priv->essid_len);
5994                 direct_mask = 1;
5995         } else {
5996                 direct_mask = 0;
5997         }
5998
5999         scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK;
6000         scan->tx_cmd.sta_id = priv->hw_setting.bcast_sta_id;
6001         scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
6002
6003
6004         switch (priv->scan_bands) {
6005         case 2:
6006                 scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK;
6007                 scan->tx_cmd.rate_n_flags =
6008                                 iwl4965_hw_set_rate_n_flags(IWL_RATE_1M_PLCP,
6009                                 RATE_MCS_ANT_B_MSK|RATE_MCS_CCK_MSK);
6010
6011                 scan->good_CRC_th = 0;
6012                 band = IEEE80211_BAND_2GHZ;
6013                 break;
6014
6015         case 1:
6016                 scan->tx_cmd.rate_n_flags =
6017                                 iwl4965_hw_set_rate_n_flags(IWL_RATE_6M_PLCP,
6018                                 RATE_MCS_ANT_B_MSK);
6019                 scan->good_CRC_th = IWL_GOOD_CRC_TH;
6020                 band = IEEE80211_BAND_5GHZ;
6021                 break;
6022
6023         default:
6024                 IWL_WARNING("Invalid scan band count\n");
6025                 goto done;
6026         }
6027
6028         /* We don't build a direct scan probe request; the uCode will do
6029          * that based on the direct_mask added to each channel entry */
6030         cmd_len = iwl4965_fill_probe_req(priv, band,
6031                                         (struct ieee80211_mgmt *)scan->data,
6032                                         IWL_MAX_SCAN_SIZE - sizeof(*scan), 0);
6033
6034         scan->tx_cmd.len = cpu_to_le16(cmd_len);
6035         /* select Rx chains */
6036
6037         /* Force use of chains B and C (0x6) for scan Rx.
6038          * Avoid A (0x1) because of its off-channel reception on A-band.
6039          * MIMO is not used here, but value is required to make uCode happy. */
6040         scan->rx_chain = RXON_RX_CHAIN_DRIVER_FORCE_MSK |
6041                         cpu_to_le16((0x7 << RXON_RX_CHAIN_VALID_POS) |
6042                         (0x6 << RXON_RX_CHAIN_FORCE_SEL_POS) |
6043                         (0x7 << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS));
6044
6045         if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR)
6046                 scan->filter_flags = RXON_FILTER_PROMISC_MSK;
6047
6048         if (direct_mask) {
6049                 IWL_DEBUG_SCAN
6050                     ("Initiating direct scan for %s.\n",
6051                      iwl4965_escape_essid(priv->essid, priv->essid_len));
6052                 scan->channel_count =
6053                         iwl4965_get_channels_for_scan(
6054                                 priv, band, 1, /* active */
6055                                 direct_mask,
6056                                 (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
6057         } else {
6058                 IWL_DEBUG_SCAN("Initiating indirect scan.\n");
6059                 scan->channel_count =
6060                         iwl4965_get_channels_for_scan(
6061                                 priv, band, 0, /* passive */
6062                                 direct_mask,
6063                                 (void *)&scan->data[le16_to_cpu(scan->tx_cmd.len)]);
6064         }
6065
6066         cmd.len += le16_to_cpu(scan->tx_cmd.len) +
6067             scan->channel_count * sizeof(struct iwl4965_scan_channel);
6068         cmd.data = scan;
6069         scan->len = cpu_to_le16(cmd.len);
6070
6071         set_bit(STATUS_SCAN_HW, &priv->status);
6072         ret = iwl_send_cmd_sync(priv, &cmd);
6073         if (ret)
6074                 goto done;
6075
6076         queue_delayed_work(priv->workqueue, &priv->scan_check,
6077                            IWL_SCAN_CHECK_WATCHDOG);
6078
6079         mutex_unlock(&priv->mutex);
6080         return;
6081
6082  done:
6083         /* inform mac80211 scan aborted */
6084         queue_work(priv->workqueue, &priv->scan_completed);
6085         mutex_unlock(&priv->mutex);
6086 }
6087
6088 static void iwl4965_bg_up(struct work_struct *data)
6089 {
6090         struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
6091
6092         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6093                 return;
6094
6095         mutex_lock(&priv->mutex);
6096         __iwl4965_up(priv);
6097         mutex_unlock(&priv->mutex);
6098 }
6099
6100 static void iwl4965_bg_restart(struct work_struct *data)
6101 {
6102         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
6103
6104         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6105                 return;
6106
6107         iwl4965_down(priv);
6108         queue_work(priv->workqueue, &priv->up);
6109 }
6110
6111 static void iwl4965_bg_rx_replenish(struct work_struct *data)
6112 {
6113         struct iwl_priv *priv =
6114             container_of(data, struct iwl_priv, rx_replenish);
6115
6116         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6117                 return;
6118
6119         mutex_lock(&priv->mutex);
6120         iwl4965_rx_replenish(priv);
6121         mutex_unlock(&priv->mutex);
6122 }
6123
6124 #define IWL_DELAY_NEXT_SCAN (HZ*2)
6125
6126 static void iwl4965_bg_post_associate(struct work_struct *data)
6127 {
6128         struct iwl_priv *priv = container_of(data, struct iwl_priv,
6129                                              post_associate.work);
6130         struct ieee80211_conf *conf = NULL;
6131         int ret = 0;
6132         DECLARE_MAC_BUF(mac);
6133
6134         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
6135                 IWL_ERROR("%s Should not be called in AP mode\n", __FUNCTION__);
6136                 return;
6137         }
6138
6139         IWL_DEBUG_ASSOC("Associated as %d to: %s\n",
6140                         priv->assoc_id,
6141                         print_mac(mac, priv->active_rxon.bssid_addr));
6142
6143
6144         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6145                 return;
6146
6147         mutex_lock(&priv->mutex);
6148
6149         if (!priv->vif || !priv->is_open) {
6150                 mutex_unlock(&priv->mutex);
6151                 return;
6152         }
6153         iwl4965_scan_cancel_timeout(priv, 200);
6154
6155         conf = ieee80211_get_hw_conf(priv->hw);
6156
6157         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6158         iwl4965_commit_rxon(priv);
6159
6160         memset(&priv->rxon_timing, 0, sizeof(struct iwl4965_rxon_time_cmd));
6161         iwl4965_setup_rxon_timing(priv);
6162         ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
6163                               sizeof(priv->rxon_timing), &priv->rxon_timing);
6164         if (ret)
6165                 IWL_WARNING("REPLY_RXON_TIMING failed - "
6166                             "Attempting to continue.\n");
6167
6168         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
6169
6170 #ifdef CONFIG_IWL4965_HT
6171         if (priv->current_ht_config.is_ht)
6172                 iwl4965_set_rxon_ht(priv, &priv->current_ht_config);
6173 #endif /* CONFIG_IWL4965_HT*/
6174         iwl4965_set_rxon_chain(priv);
6175         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
6176
6177         IWL_DEBUG_ASSOC("assoc id %d beacon interval %d\n",
6178                         priv->assoc_id, priv->beacon_int);
6179
6180         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
6181                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
6182         else
6183                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
6184
6185         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
6186                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
6187                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
6188                 else
6189                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
6190
6191                 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
6192                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
6193
6194         }
6195
6196         iwl4965_commit_rxon(priv);
6197
6198         switch (priv->iw_mode) {
6199         case IEEE80211_IF_TYPE_STA:
6200                 iwl4965_rate_scale_init(priv->hw, IWL_AP_ID);
6201                 break;
6202
6203         case IEEE80211_IF_TYPE_IBSS:
6204
6205                 /* clear out the station table */
6206                 iwlcore_clear_stations_table(priv);
6207
6208                 iwl4965_rxon_add_station(priv, iwl4965_broadcast_addr, 0);
6209                 iwl4965_rxon_add_station(priv, priv->bssid, 0);
6210                 iwl4965_rate_scale_init(priv->hw, IWL_STA_ID);
6211                 iwl4965_send_beacon_cmd(priv);
6212
6213                 break;
6214
6215         default:
6216                 IWL_ERROR("%s Should not be called in %d mode\n",
6217                                 __FUNCTION__, priv->iw_mode);
6218                 break;
6219         }
6220
6221         iwl4965_sequence_reset(priv);
6222
6223 #ifdef CONFIG_IWL4965_SENSITIVITY
6224         /* Enable Rx differential gain and sensitivity calibrations */
6225         iwl4965_chain_noise_reset(priv);
6226         priv->start_calib = 1;
6227 #endif /* CONFIG_IWL4965_SENSITIVITY */
6228
6229         if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
6230                 priv->assoc_station_added = 1;
6231
6232         iwl4965_activate_qos(priv, 0);
6233
6234         /* we have just associated, don't start scan too early */
6235         priv->next_scan_jiffies = jiffies + IWL_DELAY_NEXT_SCAN;
6236         mutex_unlock(&priv->mutex);
6237 }
6238
6239 static void iwl4965_bg_abort_scan(struct work_struct *work)
6240 {
6241         struct iwl_priv *priv = container_of(work, struct iwl_priv, abort_scan);
6242
6243         if (!iwl_is_ready(priv))
6244                 return;
6245
6246         mutex_lock(&priv->mutex);
6247
6248         set_bit(STATUS_SCAN_ABORTING, &priv->status);
6249         iwl4965_send_scan_abort(priv);
6250
6251         mutex_unlock(&priv->mutex);
6252 }
6253
6254 static int iwl4965_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf);
6255
6256 static void iwl4965_bg_scan_completed(struct work_struct *work)
6257 {
6258         struct iwl_priv *priv =
6259             container_of(work, struct iwl_priv, scan_completed);
6260
6261         IWL_DEBUG(IWL_DL_INFO | IWL_DL_SCAN, "SCAN complete scan\n");
6262
6263         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6264                 return;
6265
6266         if (test_bit(STATUS_CONF_PENDING, &priv->status))
6267                 iwl4965_mac_config(priv->hw, ieee80211_get_hw_conf(priv->hw));
6268
6269         ieee80211_scan_completed(priv->hw);
6270
6271         /* Since setting the TXPOWER may have been deferred while
6272          * performing the scan, fire one off */
6273         mutex_lock(&priv->mutex);
6274         iwl4965_hw_reg_send_txpower(priv);
6275         mutex_unlock(&priv->mutex);
6276 }
6277
6278 /*****************************************************************************
6279  *
6280  * mac80211 entry point functions
6281  *
6282  *****************************************************************************/
6283
6284 #define UCODE_READY_TIMEOUT     (2 * HZ)
6285
6286 static int iwl4965_mac_start(struct ieee80211_hw *hw)
6287 {
6288         struct iwl_priv *priv = hw->priv;
6289         int ret;
6290
6291         IWL_DEBUG_MAC80211("enter\n");
6292
6293         if (pci_enable_device(priv->pci_dev)) {
6294                 IWL_ERROR("Fail to pci_enable_device\n");
6295                 return -ENODEV;
6296         }
6297         pci_restore_state(priv->pci_dev);
6298         pci_enable_msi(priv->pci_dev);
6299
6300         ret = request_irq(priv->pci_dev->irq, iwl4965_isr, IRQF_SHARED,
6301                           DRV_NAME, priv);
6302         if (ret) {
6303                 IWL_ERROR("Error allocating IRQ %d\n", priv->pci_dev->irq);
6304                 goto out_disable_msi;
6305         }
6306
6307         /* we should be verifying the device is ready to be opened */
6308         mutex_lock(&priv->mutex);
6309
6310         memset(&priv->staging_rxon, 0, sizeof(struct iwl4965_rxon_cmd));
6311         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
6312          * ucode filename and max sizes are card-specific. */
6313
6314         if (!priv->ucode_code.len) {
6315                 ret = iwl4965_read_ucode(priv);
6316                 if (ret) {
6317                         IWL_ERROR("Could not read microcode: %d\n", ret);
6318                         mutex_unlock(&priv->mutex);
6319                         goto out_release_irq;
6320                 }
6321         }
6322
6323         ret = __iwl4965_up(priv);
6324
6325         mutex_unlock(&priv->mutex);
6326
6327         if (ret)
6328                 goto out_release_irq;
6329
6330         IWL_DEBUG_INFO("Start UP work done.\n");
6331
6332         if (test_bit(STATUS_IN_SUSPEND, &priv->status))
6333                 return 0;
6334
6335         /* Wait for START_ALIVE from ucode. Otherwise callbacks from
6336          * mac80211 will not be run successfully. */
6337         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
6338                         test_bit(STATUS_READY, &priv->status),
6339                         UCODE_READY_TIMEOUT);
6340         if (!ret) {
6341                 if (!test_bit(STATUS_READY, &priv->status)) {
6342                         IWL_ERROR("Wait for START_ALIVE timeout after %dms.\n",
6343                                   jiffies_to_msecs(UCODE_READY_TIMEOUT));
6344                         ret = -ETIMEDOUT;
6345                         goto out_release_irq;
6346                 }
6347         }
6348
6349         priv->is_open = 1;
6350         IWL_DEBUG_MAC80211("leave\n");
6351         return 0;
6352
6353 out_release_irq:
6354         free_irq(priv->pci_dev->irq, priv);
6355 out_disable_msi:
6356         pci_disable_msi(priv->pci_dev);
6357         pci_disable_device(priv->pci_dev);
6358         priv->is_open = 0;
6359         IWL_DEBUG_MAC80211("leave - failed\n");
6360         return ret;
6361 }
6362
6363 static void iwl4965_mac_stop(struct ieee80211_hw *hw)
6364 {
6365         struct iwl_priv *priv = hw->priv;
6366
6367         IWL_DEBUG_MAC80211("enter\n");
6368
6369         if (!priv->is_open) {
6370                 IWL_DEBUG_MAC80211("leave - skip\n");
6371                 return;
6372         }
6373
6374         priv->is_open = 0;
6375
6376         if (iwl_is_ready_rf(priv)) {
6377                 /* stop mac, cancel any scan request and clear
6378                  * RXON_FILTER_ASSOC_MSK BIT
6379                  */
6380                 mutex_lock(&priv->mutex);
6381                 iwl4965_scan_cancel_timeout(priv, 100);
6382                 cancel_delayed_work(&priv->post_associate);
6383                 mutex_unlock(&priv->mutex);
6384         }
6385
6386         iwl4965_down(priv);
6387
6388         flush_workqueue(priv->workqueue);
6389         free_irq(priv->pci_dev->irq, priv);
6390         pci_disable_msi(priv->pci_dev);
6391         pci_save_state(priv->pci_dev);
6392         pci_disable_device(priv->pci_dev);
6393
6394         IWL_DEBUG_MAC80211("leave\n");
6395 }
6396
6397 static int iwl4965_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb,
6398                       struct ieee80211_tx_control *ctl)
6399 {
6400         struct iwl_priv *priv = hw->priv;
6401
6402         IWL_DEBUG_MAC80211("enter\n");
6403
6404         if (priv->iw_mode == IEEE80211_IF_TYPE_MNTR) {
6405                 IWL_DEBUG_MAC80211("leave - monitor\n");
6406                 return -1;
6407         }
6408
6409         IWL_DEBUG_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
6410                      ctl->tx_rate->bitrate);
6411
6412         if (iwl4965_tx_skb(priv, skb, ctl))
6413                 dev_kfree_skb_any(skb);
6414
6415         IWL_DEBUG_MAC80211("leave\n");
6416         return 0;
6417 }
6418
6419 static int iwl4965_mac_add_interface(struct ieee80211_hw *hw,
6420                                  struct ieee80211_if_init_conf *conf)
6421 {
6422         struct iwl_priv *priv = hw->priv;
6423         unsigned long flags;
6424         DECLARE_MAC_BUF(mac);
6425
6426         IWL_DEBUG_MAC80211("enter: type %d\n", conf->type);
6427
6428         if (priv->vif) {
6429                 IWL_DEBUG_MAC80211("leave - vif != NULL\n");
6430                 return -EOPNOTSUPP;
6431         }
6432
6433         spin_lock_irqsave(&priv->lock, flags);
6434         priv->vif = conf->vif;
6435
6436         spin_unlock_irqrestore(&priv->lock, flags);
6437
6438         mutex_lock(&priv->mutex);
6439
6440         if (conf->mac_addr) {
6441                 IWL_DEBUG_MAC80211("Set %s\n", print_mac(mac, conf->mac_addr));
6442                 memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
6443         }
6444
6445         if (iwl_is_ready(priv))
6446                 iwl4965_set_mode(priv, conf->type);
6447
6448         mutex_unlock(&priv->mutex);
6449
6450         IWL_DEBUG_MAC80211("leave\n");
6451         return 0;
6452 }
6453
6454 /**
6455  * iwl4965_mac_config - mac80211 config callback
6456  *
6457  * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
6458  * be set inappropriately and the driver currently sets the hardware up to
6459  * use it whenever needed.
6460  */
6461 static int iwl4965_mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf)
6462 {
6463         struct iwl_priv *priv = hw->priv;
6464         const struct iwl_channel_info *ch_info;
6465         unsigned long flags;
6466         int ret = 0;
6467
6468         mutex_lock(&priv->mutex);
6469         IWL_DEBUG_MAC80211("enter to channel %d\n", conf->channel->hw_value);
6470
6471         priv->add_radiotap = !!(conf->flags & IEEE80211_CONF_RADIOTAP);
6472
6473         if (!iwl_is_ready(priv)) {
6474                 IWL_DEBUG_MAC80211("leave - not ready\n");
6475                 ret = -EIO;
6476                 goto out;
6477         }
6478
6479         if (unlikely(!priv->cfg->mod_params->disable_hw_scan &&
6480                      test_bit(STATUS_SCANNING, &priv->status))) {
6481                 IWL_DEBUG_MAC80211("leave - scanning\n");
6482                 set_bit(STATUS_CONF_PENDING, &priv->status);
6483                 mutex_unlock(&priv->mutex);
6484                 return 0;
6485         }
6486
6487         spin_lock_irqsave(&priv->lock, flags);
6488
6489         ch_info = iwl_get_channel_info(priv, conf->channel->band,
6490                         ieee80211_frequency_to_channel(conf->channel->center_freq));
6491         if (!is_channel_valid(ch_info)) {
6492                 IWL_DEBUG_MAC80211("leave - invalid channel\n");
6493                 spin_unlock_irqrestore(&priv->lock, flags);
6494                 ret = -EINVAL;
6495                 goto out;
6496         }
6497
6498 #ifdef CONFIG_IWL4965_HT
6499         /* if we are switching from ht to 2.4 clear flags
6500          * from any ht related info since 2.4 does not
6501          * support ht */
6502         if ((le16_to_cpu(priv->staging_rxon.channel) != conf->channel->hw_value)
6503 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
6504             && !(conf->flags & IEEE80211_CONF_CHANNEL_SWITCH)
6505 #endif
6506         )
6507                 priv->staging_rxon.flags = 0;
6508 #endif /* CONFIG_IWL4965_HT */
6509
6510         iwlcore_set_rxon_channel(priv, conf->channel->band,
6511                 ieee80211_frequency_to_channel(conf->channel->center_freq));
6512
6513         iwl4965_set_flags_for_phymode(priv, conf->channel->band);
6514
6515         /* The list of supported rates and rate mask can be different
6516          * for each band; since the band may have changed, reset
6517          * the rate mask to what mac80211 lists */
6518         iwl4965_set_rate(priv);
6519
6520         spin_unlock_irqrestore(&priv->lock, flags);
6521
6522 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
6523         if (conf->flags & IEEE80211_CONF_CHANNEL_SWITCH) {
6524                 iwl4965_hw_channel_switch(priv, conf->channel);
6525                 goto out;
6526         }
6527 #endif
6528
6529         if (priv->cfg->ops->lib->radio_kill_sw)
6530                 priv->cfg->ops->lib->radio_kill_sw(priv, !conf->radio_enabled);
6531
6532         if (!conf->radio_enabled) {
6533                 IWL_DEBUG_MAC80211("leave - radio disabled\n");
6534                 goto out;
6535         }
6536
6537         if (iwl_is_rfkill(priv)) {
6538                 IWL_DEBUG_MAC80211("leave - RF kill\n");
6539                 ret = -EIO;
6540                 goto out;
6541         }
6542
6543         iwl4965_set_rate(priv);
6544
6545         if (memcmp(&priv->active_rxon,
6546                    &priv->staging_rxon, sizeof(priv->staging_rxon)))
6547                 iwl4965_commit_rxon(priv);
6548         else
6549                 IWL_DEBUG_INFO("No re-sending same RXON configuration.\n");
6550
6551         IWL_DEBUG_MAC80211("leave\n");
6552
6553 out:
6554         clear_bit(STATUS_CONF_PENDING, &priv->status);
6555         mutex_unlock(&priv->mutex);
6556         return ret;
6557 }
6558
6559 static void iwl4965_config_ap(struct iwl_priv *priv)
6560 {
6561         int ret = 0;
6562
6563         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
6564                 return;
6565
6566         /* The following should be done only at AP bring up */
6567         if ((priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) == 0) {
6568
6569                 /* RXON - unassoc (to set timing command) */
6570                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6571                 iwl4965_commit_rxon(priv);
6572
6573                 /* RXON Timing */
6574                 memset(&priv->rxon_timing, 0, sizeof(struct iwl4965_rxon_time_cmd));
6575                 iwl4965_setup_rxon_timing(priv);
6576                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
6577                                 sizeof(priv->rxon_timing), &priv->rxon_timing);
6578                 if (ret)
6579                         IWL_WARNING("REPLY_RXON_TIMING failed - "
6580                                         "Attempting to continue.\n");
6581
6582                 iwl4965_set_rxon_chain(priv);
6583
6584                 /* FIXME: what should be the assoc_id for AP? */
6585                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
6586                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
6587                         priv->staging_rxon.flags |=
6588                                 RXON_FLG_SHORT_PREAMBLE_MSK;
6589                 else
6590                         priv->staging_rxon.flags &=
6591                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
6592
6593                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
6594                         if (priv->assoc_capability &
6595                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
6596                                 priv->staging_rxon.flags |=
6597                                         RXON_FLG_SHORT_SLOT_MSK;
6598                         else
6599                                 priv->staging_rxon.flags &=
6600                                         ~RXON_FLG_SHORT_SLOT_MSK;
6601
6602                         if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS)
6603                                 priv->staging_rxon.flags &=
6604                                         ~RXON_FLG_SHORT_SLOT_MSK;
6605                 }
6606                 /* restore RXON assoc */
6607                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
6608                 iwl4965_commit_rxon(priv);
6609                 iwl4965_activate_qos(priv, 1);
6610                 iwl4965_rxon_add_station(priv, iwl4965_broadcast_addr, 0);
6611         }
6612         iwl4965_send_beacon_cmd(priv);
6613
6614         /* FIXME - we need to add code here to detect a totally new
6615          * configuration, reset the AP, unassoc, rxon timing, assoc,
6616          * clear sta table, add BCAST sta... */
6617 }
6618
6619 static int iwl4965_mac_config_interface(struct ieee80211_hw *hw,
6620                                         struct ieee80211_vif *vif,
6621                                     struct ieee80211_if_conf *conf)
6622 {
6623         struct iwl_priv *priv = hw->priv;
6624         DECLARE_MAC_BUF(mac);
6625         unsigned long flags;
6626         int rc;
6627
6628         if (conf == NULL)
6629                 return -EIO;
6630
6631         if (priv->vif != vif) {
6632                 IWL_DEBUG_MAC80211("leave - priv->vif != vif\n");
6633                 mutex_unlock(&priv->mutex);
6634                 return 0;
6635         }
6636
6637         if ((priv->iw_mode == IEEE80211_IF_TYPE_AP) &&
6638             (!conf->beacon || !conf->ssid_len)) {
6639                 IWL_DEBUG_MAC80211
6640                     ("Leaving in AP mode because HostAPD is not ready.\n");
6641                 return 0;
6642         }
6643
6644         if (!iwl_is_alive(priv))
6645                 return -EAGAIN;
6646
6647         mutex_lock(&priv->mutex);
6648
6649         if (conf->bssid)
6650                 IWL_DEBUG_MAC80211("bssid: %s\n",
6651                                    print_mac(mac, conf->bssid));
6652
6653 /*
6654  * very dubious code was here; the probe filtering flag is never set:
6655  *
6656         if (unlikely(test_bit(STATUS_SCANNING, &priv->status)) &&
6657             !(priv->hw->flags & IEEE80211_HW_NO_PROBE_FILTERING)) {
6658  */
6659
6660         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
6661                 if (!conf->bssid) {
6662                         conf->bssid = priv->mac_addr;
6663                         memcpy(priv->bssid, priv->mac_addr, ETH_ALEN);
6664                         IWL_DEBUG_MAC80211("bssid was set to: %s\n",
6665                                            print_mac(mac, conf->bssid));
6666                 }
6667                 if (priv->ibss_beacon)
6668                         dev_kfree_skb(priv->ibss_beacon);
6669
6670                 priv->ibss_beacon = conf->beacon;
6671         }
6672
6673         if (iwl_is_rfkill(priv))
6674                 goto done;
6675
6676         if (conf->bssid && !is_zero_ether_addr(conf->bssid) &&
6677             !is_multicast_ether_addr(conf->bssid)) {
6678                 /* If there is currently a HW scan going on in the background
6679                  * then we need to cancel it else the RXON below will fail. */
6680                 if (iwl4965_scan_cancel_timeout(priv, 100)) {
6681                         IWL_WARNING("Aborted scan still in progress "
6682                                     "after 100ms\n");
6683                         IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
6684                         mutex_unlock(&priv->mutex);
6685                         return -EAGAIN;
6686                 }
6687                 memcpy(priv->staging_rxon.bssid_addr, conf->bssid, ETH_ALEN);
6688
6689                 /* TODO: Audit driver for usage of these members and see
6690                  * if mac80211 deprecates them (priv->bssid looks like it
6691                  * shouldn't be there, but I haven't scanned the IBSS code
6692                  * to verify) - jpk */
6693                 memcpy(priv->bssid, conf->bssid, ETH_ALEN);
6694
6695                 if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
6696                         iwl4965_config_ap(priv);
6697                 else {
6698                         rc = iwl4965_commit_rxon(priv);
6699                         if ((priv->iw_mode == IEEE80211_IF_TYPE_STA) && rc)
6700                                 iwl4965_rxon_add_station(
6701                                         priv, priv->active_rxon.bssid_addr, 1);
6702                 }
6703
6704         } else {
6705                 iwl4965_scan_cancel_timeout(priv, 100);
6706                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6707                 iwl4965_commit_rxon(priv);
6708         }
6709
6710  done:
6711         spin_lock_irqsave(&priv->lock, flags);
6712         if (!conf->ssid_len)
6713                 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
6714         else
6715                 memcpy(priv->essid, conf->ssid, conf->ssid_len);
6716
6717         priv->essid_len = conf->ssid_len;
6718         spin_unlock_irqrestore(&priv->lock, flags);
6719
6720         IWL_DEBUG_MAC80211("leave\n");
6721         mutex_unlock(&priv->mutex);
6722
6723         return 0;
6724 }
6725
6726 static void iwl4965_configure_filter(struct ieee80211_hw *hw,
6727                                  unsigned int changed_flags,
6728                                  unsigned int *total_flags,
6729                                  int mc_count, struct dev_addr_list *mc_list)
6730 {
6731         /*
6732          * XXX: dummy
6733          * see also iwl4965_connection_init_rx_config
6734          */
6735         *total_flags = 0;
6736 }
6737
6738 static void iwl4965_mac_remove_interface(struct ieee80211_hw *hw,
6739                                      struct ieee80211_if_init_conf *conf)
6740 {
6741         struct iwl_priv *priv = hw->priv;
6742
6743         IWL_DEBUG_MAC80211("enter\n");
6744
6745         mutex_lock(&priv->mutex);
6746
6747         if (iwl_is_ready_rf(priv)) {
6748                 iwl4965_scan_cancel_timeout(priv, 100);
6749                 cancel_delayed_work(&priv->post_associate);
6750                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
6751                 iwl4965_commit_rxon(priv);
6752         }
6753         if (priv->vif == conf->vif) {
6754                 priv->vif = NULL;
6755                 memset(priv->bssid, 0, ETH_ALEN);
6756                 memset(priv->essid, 0, IW_ESSID_MAX_SIZE);
6757                 priv->essid_len = 0;
6758         }
6759         mutex_unlock(&priv->mutex);
6760
6761         IWL_DEBUG_MAC80211("leave\n");
6762
6763 }
6764
6765
6766 #ifdef CONFIG_IWL4965_HT
6767 static void iwl4965_ht_conf(struct iwl_priv *priv,
6768                             struct ieee80211_bss_conf *bss_conf)
6769 {
6770         struct ieee80211_ht_info *ht_conf = bss_conf->ht_conf;
6771         struct ieee80211_ht_bss_info *ht_bss_conf = bss_conf->ht_bss_conf;
6772         struct iwl_ht_info *iwl_conf = &priv->current_ht_config;
6773
6774         IWL_DEBUG_MAC80211("enter: \n");
6775
6776         iwl_conf->is_ht = bss_conf->assoc_ht;
6777
6778         if (!iwl_conf->is_ht)
6779                 return;
6780
6781         priv->ps_mode = (u8)((ht_conf->cap & IEEE80211_HT_CAP_MIMO_PS) >> 2);
6782
6783         if (ht_conf->cap & IEEE80211_HT_CAP_SGI_20)
6784                 iwl_conf->sgf |= 0x1;
6785         if (ht_conf->cap & IEEE80211_HT_CAP_SGI_40)
6786                 iwl_conf->sgf |= 0x2;
6787
6788         iwl_conf->is_green_field = !!(ht_conf->cap & IEEE80211_HT_CAP_GRN_FLD);
6789         iwl_conf->max_amsdu_size =
6790                 !!(ht_conf->cap & IEEE80211_HT_CAP_MAX_AMSDU);
6791
6792         iwl_conf->supported_chan_width =
6793                 !!(ht_conf->cap & IEEE80211_HT_CAP_SUP_WIDTH);
6794         iwl_conf->extension_chan_offset =
6795                 ht_bss_conf->bss_cap & IEEE80211_HT_IE_CHA_SEC_OFFSET;
6796         /* If no above or below channel supplied disable FAT channel */
6797         if (iwl_conf->extension_chan_offset != IWL_EXT_CHANNEL_OFFSET_ABOVE &&
6798             iwl_conf->extension_chan_offset != IWL_EXT_CHANNEL_OFFSET_BELOW)
6799                 iwl_conf->supported_chan_width = 0;
6800
6801         iwl_conf->tx_mimo_ps_mode =
6802                 (u8)((ht_conf->cap & IEEE80211_HT_CAP_MIMO_PS) >> 2);
6803         memcpy(iwl_conf->supp_mcs_set, ht_conf->supp_mcs_set, 16);
6804
6805         iwl_conf->control_channel = ht_bss_conf->primary_channel;
6806         iwl_conf->tx_chan_width =
6807                 !!(ht_bss_conf->bss_cap & IEEE80211_HT_IE_CHA_WIDTH);
6808         iwl_conf->ht_protection =
6809                 ht_bss_conf->bss_op_mode & IEEE80211_HT_IE_HT_PROTECTION;
6810         iwl_conf->non_GF_STA_present =
6811                 !!(ht_bss_conf->bss_op_mode & IEEE80211_HT_IE_NON_GF_STA_PRSNT);
6812
6813         IWL_DEBUG_MAC80211("control channel %d\n", iwl_conf->control_channel);
6814         IWL_DEBUG_MAC80211("leave\n");
6815 }
6816 #else
6817 static inline void iwl4965_ht_conf(struct iwl_priv *priv,
6818                                    struct ieee80211_bss_conf *bss_conf)
6819 {
6820 }
6821 #endif
6822
6823 #define IWL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6)
6824 static void iwl4965_bss_info_changed(struct ieee80211_hw *hw,
6825                                      struct ieee80211_vif *vif,
6826                                      struct ieee80211_bss_conf *bss_conf,
6827                                      u32 changes)
6828 {
6829         struct iwl_priv *priv = hw->priv;
6830
6831         IWL_DEBUG_MAC80211("changes = 0x%X\n", changes);
6832
6833         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
6834                 IWL_DEBUG_MAC80211("ERP_PREAMBLE %d\n",
6835                                    bss_conf->use_short_preamble);
6836                 if (bss_conf->use_short_preamble)
6837                         priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
6838                 else
6839                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
6840         }
6841
6842         if (changes & BSS_CHANGED_ERP_CTS_PROT) {
6843                 IWL_DEBUG_MAC80211("ERP_CTS %d\n", bss_conf->use_cts_prot);
6844                 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
6845                         priv->staging_rxon.flags |= RXON_FLG_TGG_PROTECT_MSK;
6846                 else
6847                         priv->staging_rxon.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
6848         }
6849
6850         if (changes & BSS_CHANGED_HT) {
6851                 IWL_DEBUG_MAC80211("HT %d\n", bss_conf->assoc_ht);
6852                 iwl4965_ht_conf(priv, bss_conf);
6853                 iwl4965_set_rxon_chain(priv);
6854         }
6855
6856         if (changes & BSS_CHANGED_ASSOC) {
6857                 IWL_DEBUG_MAC80211("ASSOC %d\n", bss_conf->assoc);
6858                 if (bss_conf->assoc) {
6859                         priv->assoc_id = bss_conf->aid;
6860                         priv->beacon_int = bss_conf->beacon_int;
6861                         priv->timestamp = bss_conf->timestamp;
6862                         priv->assoc_capability = bss_conf->assoc_capability;
6863                         priv->next_scan_jiffies = jiffies +
6864                                         IWL_DELAY_NEXT_SCAN_AFTER_ASSOC;
6865                         queue_work(priv->workqueue, &priv->post_associate.work);
6866                 } else {
6867                         priv->assoc_id = 0;
6868                         IWL_DEBUG_MAC80211("DISASSOC %d\n", bss_conf->assoc);
6869                 }
6870         } else if (changes && iwl_is_associated(priv) && priv->assoc_id) {
6871                         IWL_DEBUG_MAC80211("Associated Changes %d\n", changes);
6872                         iwl4965_send_rxon_assoc(priv);
6873         }
6874
6875 }
6876
6877 static int iwl4965_mac_hw_scan(struct ieee80211_hw *hw, u8 *ssid, size_t len)
6878 {
6879         int rc = 0;
6880         unsigned long flags;
6881         struct iwl_priv *priv = hw->priv;
6882
6883         IWL_DEBUG_MAC80211("enter\n");
6884
6885         mutex_lock(&priv->mutex);
6886         spin_lock_irqsave(&priv->lock, flags);
6887
6888         if (!iwl_is_ready_rf(priv)) {
6889                 rc = -EIO;
6890                 IWL_DEBUG_MAC80211("leave - not ready or exit pending\n");
6891                 goto out_unlock;
6892         }
6893
6894         if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {    /* APs don't scan */
6895                 rc = -EIO;
6896                 IWL_ERROR("ERROR: APs don't scan\n");
6897                 goto out_unlock;
6898         }
6899
6900         /* we don't schedule scan within next_scan_jiffies period */
6901         if (priv->next_scan_jiffies &&
6902                         time_after(priv->next_scan_jiffies, jiffies)) {
6903                 rc = -EAGAIN;
6904                 goto out_unlock;
6905         }
6906         /* if we just finished scan ask for delay */
6907         if (priv->last_scan_jiffies && time_after(priv->last_scan_jiffies +
6908                                 IWL_DELAY_NEXT_SCAN, jiffies)) {
6909                 rc = -EAGAIN;
6910                 goto out_unlock;
6911         }
6912         if (len) {
6913                 IWL_DEBUG_SCAN("direct scan for %s [%d]\n ",
6914                                iwl4965_escape_essid(ssid, len), (int)len);
6915
6916                 priv->one_direct_scan = 1;
6917                 priv->direct_ssid_len = (u8)
6918                     min((u8) len, (u8) IW_ESSID_MAX_SIZE);
6919                 memcpy(priv->direct_ssid, ssid, priv->direct_ssid_len);
6920         } else
6921                 priv->one_direct_scan = 0;
6922
6923         rc = iwl4965_scan_initiate(priv);
6924
6925         IWL_DEBUG_MAC80211("leave\n");
6926
6927 out_unlock:
6928         spin_unlock_irqrestore(&priv->lock, flags);
6929         mutex_unlock(&priv->mutex);
6930
6931         return rc;
6932 }
6933
6934 static void iwl4965_mac_update_tkip_key(struct ieee80211_hw *hw,
6935                         struct ieee80211_key_conf *keyconf, const u8 *addr,
6936                         u32 iv32, u16 *phase1key)
6937 {
6938         struct iwl_priv *priv = hw->priv;
6939         u8 sta_id = IWL_INVALID_STATION;
6940         unsigned long flags;
6941         __le16 key_flags = 0;
6942         int i;
6943         DECLARE_MAC_BUF(mac);
6944
6945         IWL_DEBUG_MAC80211("enter\n");
6946
6947         sta_id = iwl4965_hw_find_station(priv, addr);
6948         if (sta_id == IWL_INVALID_STATION) {
6949                 IWL_DEBUG_MAC80211("leave - %s not in station map.\n",
6950                                    print_mac(mac, addr));
6951                 return;
6952         }
6953
6954         iwl4965_scan_cancel_timeout(priv, 100);
6955
6956         key_flags |= (STA_KEY_FLG_TKIP | STA_KEY_FLG_MAP_KEY_MSK);
6957         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
6958         key_flags &= ~STA_KEY_FLG_INVALID;
6959
6960         if (sta_id == priv->hw_setting.bcast_sta_id)
6961                 key_flags |= STA_KEY_MULTICAST_MSK;
6962
6963         spin_lock_irqsave(&priv->sta_lock, flags);
6964
6965         priv->stations[sta_id].sta.key.key_offset =
6966                                         (sta_id % STA_KEY_MAX_NUM);/* FIXME */
6967         priv->stations[sta_id].sta.key.key_flags = key_flags;
6968         priv->stations[sta_id].sta.key.tkip_rx_tsc_byte2 = (u8) iv32;
6969
6970         for (i = 0; i < 5; i++)
6971                 priv->stations[sta_id].sta.key.tkip_rx_ttak[i] =
6972                         cpu_to_le16(phase1key[i]);
6973
6974         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
6975         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
6976
6977         iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
6978
6979         spin_unlock_irqrestore(&priv->sta_lock, flags);
6980
6981         IWL_DEBUG_MAC80211("leave\n");
6982 }
6983
6984 static int iwl4965_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
6985                            const u8 *local_addr, const u8 *addr,
6986                            struct ieee80211_key_conf *key)
6987 {
6988         struct iwl_priv *priv = hw->priv;
6989         DECLARE_MAC_BUF(mac);
6990         int ret = 0;
6991         u8 sta_id = IWL_INVALID_STATION;
6992         u8 static_key;
6993
6994         IWL_DEBUG_MAC80211("enter\n");
6995
6996         if (!priv->cfg->mod_params->hw_crypto) {
6997                 IWL_DEBUG_MAC80211("leave - hwcrypto disabled\n");
6998                 return -EOPNOTSUPP;
6999         }
7000
7001         if (is_zero_ether_addr(addr))
7002                 /* only support pairwise keys */
7003                 return -EOPNOTSUPP;
7004
7005         /* FIXME: need to differenciate between static and dynamic key
7006          * in the level of mac80211 */
7007         static_key = !iwl_is_associated(priv);
7008
7009         if (!static_key) {
7010                 sta_id = iwl4965_hw_find_station(priv, addr);
7011                 if (sta_id == IWL_INVALID_STATION) {
7012                         IWL_DEBUG_MAC80211("leave - %s not in station map.\n",
7013                                            print_mac(mac, addr));
7014                         return -EINVAL;
7015                 }
7016         }
7017
7018         iwl4965_scan_cancel_timeout(priv, 100);
7019
7020         switch (cmd) {
7021         case SET_KEY:
7022                 if (static_key)
7023                         ret = iwl4965_set_static_key(priv, key);
7024                 else
7025                         ret = iwl4965_set_dynamic_key(priv, key, sta_id);
7026
7027                 IWL_DEBUG_MAC80211("enable hwcrypto key\n");
7028                 break;
7029         case DISABLE_KEY:
7030                 if (static_key)
7031                         ret = iwl4965_remove_static_key(priv);
7032                 else
7033                         ret = iwl4965_clear_sta_key_info(priv, sta_id);
7034
7035                 IWL_DEBUG_MAC80211("disable hwcrypto key\n");
7036                 break;
7037         default:
7038                 ret = -EINVAL;
7039         }
7040
7041         IWL_DEBUG_MAC80211("leave\n");
7042
7043         return ret;
7044 }
7045
7046 static int iwl4965_mac_conf_tx(struct ieee80211_hw *hw, int queue,
7047                            const struct ieee80211_tx_queue_params *params)
7048 {
7049         struct iwl_priv *priv = hw->priv;
7050         unsigned long flags;
7051         int q;
7052
7053         IWL_DEBUG_MAC80211("enter\n");
7054
7055         if (!iwl_is_ready_rf(priv)) {
7056                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7057                 return -EIO;
7058         }
7059
7060         if (queue >= AC_NUM) {
7061                 IWL_DEBUG_MAC80211("leave - queue >= AC_NUM %d\n", queue);
7062                 return 0;
7063         }
7064
7065         if (!priv->qos_data.qos_enable) {
7066                 priv->qos_data.qos_active = 0;
7067                 IWL_DEBUG_MAC80211("leave - qos not enabled\n");
7068                 return 0;
7069         }
7070         q = AC_NUM - 1 - queue;
7071
7072         spin_lock_irqsave(&priv->lock, flags);
7073
7074         priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
7075         priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
7076         priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
7077         priv->qos_data.def_qos_parm.ac[q].edca_txop =
7078                         cpu_to_le16((params->txop * 32));
7079
7080         priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
7081         priv->qos_data.qos_active = 1;
7082
7083         spin_unlock_irqrestore(&priv->lock, flags);
7084
7085         mutex_lock(&priv->mutex);
7086         if (priv->iw_mode == IEEE80211_IF_TYPE_AP)
7087                 iwl4965_activate_qos(priv, 1);
7088         else if (priv->assoc_id && iwl_is_associated(priv))
7089                 iwl4965_activate_qos(priv, 0);
7090
7091         mutex_unlock(&priv->mutex);
7092
7093         IWL_DEBUG_MAC80211("leave\n");
7094         return 0;
7095 }
7096
7097 static int iwl4965_mac_get_tx_stats(struct ieee80211_hw *hw,
7098                                 struct ieee80211_tx_queue_stats *stats)
7099 {
7100         struct iwl_priv *priv = hw->priv;
7101         int i, avail;
7102         struct iwl4965_tx_queue *txq;
7103         struct iwl4965_queue *q;
7104         unsigned long flags;
7105
7106         IWL_DEBUG_MAC80211("enter\n");
7107
7108         if (!iwl_is_ready_rf(priv)) {
7109                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7110                 return -EIO;
7111         }
7112
7113         spin_lock_irqsave(&priv->lock, flags);
7114
7115         for (i = 0; i < AC_NUM; i++) {
7116                 txq = &priv->txq[i];
7117                 q = &txq->q;
7118                 avail = iwl4965_queue_space(q);
7119
7120                 stats->data[i].len = q->n_window - avail;
7121                 stats->data[i].limit = q->n_window - q->high_mark;
7122                 stats->data[i].count = q->n_window;
7123
7124         }
7125         spin_unlock_irqrestore(&priv->lock, flags);
7126
7127         IWL_DEBUG_MAC80211("leave\n");
7128
7129         return 0;
7130 }
7131
7132 static int iwl4965_mac_get_stats(struct ieee80211_hw *hw,
7133                              struct ieee80211_low_level_stats *stats)
7134 {
7135         IWL_DEBUG_MAC80211("enter\n");
7136         IWL_DEBUG_MAC80211("leave\n");
7137
7138         return 0;
7139 }
7140
7141 static u64 iwl4965_mac_get_tsf(struct ieee80211_hw *hw)
7142 {
7143         IWL_DEBUG_MAC80211("enter\n");
7144         IWL_DEBUG_MAC80211("leave\n");
7145
7146         return 0;
7147 }
7148
7149 static void iwl4965_mac_reset_tsf(struct ieee80211_hw *hw)
7150 {
7151         struct iwl_priv *priv = hw->priv;
7152         unsigned long flags;
7153
7154         mutex_lock(&priv->mutex);
7155         IWL_DEBUG_MAC80211("enter\n");
7156
7157         priv->lq_mngr.lq_ready = 0;
7158 #ifdef CONFIG_IWL4965_HT
7159         spin_lock_irqsave(&priv->lock, flags);
7160         memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_info));
7161         spin_unlock_irqrestore(&priv->lock, flags);
7162 #endif /* CONFIG_IWL4965_HT */
7163
7164         iwlcore_reset_qos(priv);
7165
7166         cancel_delayed_work(&priv->post_associate);
7167
7168         spin_lock_irqsave(&priv->lock, flags);
7169         priv->assoc_id = 0;
7170         priv->assoc_capability = 0;
7171         priv->assoc_station_added = 0;
7172
7173         /* new association get rid of ibss beacon skb */
7174         if (priv->ibss_beacon)
7175                 dev_kfree_skb(priv->ibss_beacon);
7176
7177         priv->ibss_beacon = NULL;
7178
7179         priv->beacon_int = priv->hw->conf.beacon_int;
7180         priv->timestamp = 0;
7181         if ((priv->iw_mode == IEEE80211_IF_TYPE_STA))
7182                 priv->beacon_int = 0;
7183
7184         spin_unlock_irqrestore(&priv->lock, flags);
7185
7186         if (!iwl_is_ready_rf(priv)) {
7187                 IWL_DEBUG_MAC80211("leave - not ready\n");
7188                 mutex_unlock(&priv->mutex);
7189                 return;
7190         }
7191
7192         /* we are restarting association process
7193          * clear RXON_FILTER_ASSOC_MSK bit
7194          */
7195         if (priv->iw_mode != IEEE80211_IF_TYPE_AP) {
7196                 iwl4965_scan_cancel_timeout(priv, 100);
7197                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
7198                 iwl4965_commit_rxon(priv);
7199         }
7200
7201         /* Per mac80211.h: This is only used in IBSS mode... */
7202         if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
7203
7204                 IWL_DEBUG_MAC80211("leave - not in IBSS\n");
7205                 mutex_unlock(&priv->mutex);
7206                 return;
7207         }
7208
7209         priv->only_active_channel = 0;
7210
7211         iwl4965_set_rate(priv);
7212
7213         mutex_unlock(&priv->mutex);
7214
7215         IWL_DEBUG_MAC80211("leave\n");
7216 }
7217
7218 static int iwl4965_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb,
7219                                  struct ieee80211_tx_control *control)
7220 {
7221         struct iwl_priv *priv = hw->priv;
7222         unsigned long flags;
7223
7224         mutex_lock(&priv->mutex);
7225         IWL_DEBUG_MAC80211("enter\n");
7226
7227         if (!iwl_is_ready_rf(priv)) {
7228                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
7229                 mutex_unlock(&priv->mutex);
7230                 return -EIO;
7231         }
7232
7233         if (priv->iw_mode != IEEE80211_IF_TYPE_IBSS) {
7234                 IWL_DEBUG_MAC80211("leave - not IBSS\n");
7235                 mutex_unlock(&priv->mutex);
7236                 return -EIO;
7237         }
7238
7239         spin_lock_irqsave(&priv->lock, flags);
7240
7241         if (priv->ibss_beacon)
7242                 dev_kfree_skb(priv->ibss_beacon);
7243
7244         priv->ibss_beacon = skb;
7245
7246         priv->assoc_id = 0;
7247
7248         IWL_DEBUG_MAC80211("leave\n");
7249         spin_unlock_irqrestore(&priv->lock, flags);
7250
7251         iwlcore_reset_qos(priv);
7252
7253         queue_work(priv->workqueue, &priv->post_associate.work);
7254
7255         mutex_unlock(&priv->mutex);
7256
7257         return 0;
7258 }
7259
7260 /*****************************************************************************
7261  *
7262  * sysfs attributes
7263  *
7264  *****************************************************************************/
7265
7266 #ifdef CONFIG_IWLWIFI_DEBUG
7267
7268 /*
7269  * The following adds a new attribute to the sysfs representation
7270  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
7271  * used for controlling the debug level.
7272  *
7273  * See the level definitions in iwl for details.
7274  */
7275
7276 static ssize_t show_debug_level(struct device_driver *d, char *buf)
7277 {
7278         return sprintf(buf, "0x%08X\n", iwl_debug_level);
7279 }
7280 static ssize_t store_debug_level(struct device_driver *d,
7281                                  const char *buf, size_t count)
7282 {
7283         char *p = (char *)buf;
7284         u32 val;
7285
7286         val = simple_strtoul(p, &p, 0);
7287         if (p == buf)
7288                 printk(KERN_INFO DRV_NAME
7289                        ": %s is not in hex or decimal form.\n", buf);
7290         else
7291                 iwl_debug_level = val;
7292
7293         return strnlen(buf, count);
7294 }
7295
7296 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
7297                    show_debug_level, store_debug_level);
7298
7299 #endif /* CONFIG_IWLWIFI_DEBUG */
7300
7301
7302 static ssize_t show_temperature(struct device *d,
7303                                 struct device_attribute *attr, char *buf)
7304 {
7305         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7306
7307         if (!iwl_is_alive(priv))
7308                 return -EAGAIN;
7309
7310         return sprintf(buf, "%d\n", iwl4965_hw_get_temperature(priv));
7311 }
7312
7313 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
7314
7315 static ssize_t show_rs_window(struct device *d,
7316                               struct device_attribute *attr,
7317                               char *buf)
7318 {
7319         struct iwl_priv *priv = d->driver_data;
7320         return iwl4965_fill_rs_info(priv->hw, buf, IWL_AP_ID);
7321 }
7322 static DEVICE_ATTR(rs_window, S_IRUGO, show_rs_window, NULL);
7323
7324 static ssize_t show_tx_power(struct device *d,
7325                              struct device_attribute *attr, char *buf)
7326 {
7327         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7328         return sprintf(buf, "%d\n", priv->user_txpower_limit);
7329 }
7330
7331 static ssize_t store_tx_power(struct device *d,
7332                               struct device_attribute *attr,
7333                               const char *buf, size_t count)
7334 {
7335         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7336         char *p = (char *)buf;
7337         u32 val;
7338
7339         val = simple_strtoul(p, &p, 10);
7340         if (p == buf)
7341                 printk(KERN_INFO DRV_NAME
7342                        ": %s is not in decimal form.\n", buf);
7343         else
7344                 iwl4965_hw_reg_set_txpower(priv, val);
7345
7346         return count;
7347 }
7348
7349 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
7350
7351 static ssize_t show_flags(struct device *d,
7352                           struct device_attribute *attr, char *buf)
7353 {
7354         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7355
7356         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
7357 }
7358
7359 static ssize_t store_flags(struct device *d,
7360                            struct device_attribute *attr,
7361                            const char *buf, size_t count)
7362 {
7363         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7364         u32 flags = simple_strtoul(buf, NULL, 0);
7365
7366         mutex_lock(&priv->mutex);
7367         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
7368                 /* Cancel any currently running scans... */
7369                 if (iwl4965_scan_cancel_timeout(priv, 100))
7370                         IWL_WARNING("Could not cancel scan.\n");
7371                 else {
7372                         IWL_DEBUG_INFO("Committing rxon.flags = 0x%04X\n",
7373                                        flags);
7374                         priv->staging_rxon.flags = cpu_to_le32(flags);
7375                         iwl4965_commit_rxon(priv);
7376                 }
7377         }
7378         mutex_unlock(&priv->mutex);
7379
7380         return count;
7381 }
7382
7383 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
7384
7385 static ssize_t show_filter_flags(struct device *d,
7386                                  struct device_attribute *attr, char *buf)
7387 {
7388         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7389
7390         return sprintf(buf, "0x%04X\n",
7391                 le32_to_cpu(priv->active_rxon.filter_flags));
7392 }
7393
7394 static ssize_t store_filter_flags(struct device *d,
7395                                   struct device_attribute *attr,
7396                                   const char *buf, size_t count)
7397 {
7398         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7399         u32 filter_flags = simple_strtoul(buf, NULL, 0);
7400
7401         mutex_lock(&priv->mutex);
7402         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
7403                 /* Cancel any currently running scans... */
7404                 if (iwl4965_scan_cancel_timeout(priv, 100))
7405                         IWL_WARNING("Could not cancel scan.\n");
7406                 else {
7407                         IWL_DEBUG_INFO("Committing rxon.filter_flags = "
7408                                        "0x%04X\n", filter_flags);
7409                         priv->staging_rxon.filter_flags =
7410                                 cpu_to_le32(filter_flags);
7411                         iwl4965_commit_rxon(priv);
7412                 }
7413         }
7414         mutex_unlock(&priv->mutex);
7415
7416         return count;
7417 }
7418
7419 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
7420                    store_filter_flags);
7421
7422 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
7423
7424 static ssize_t show_measurement(struct device *d,
7425                                 struct device_attribute *attr, char *buf)
7426 {
7427         struct iwl_priv *priv = dev_get_drvdata(d);
7428         struct iwl4965_spectrum_notification measure_report;
7429         u32 size = sizeof(measure_report), len = 0, ofs = 0;
7430         u8 *data = (u8 *) & measure_report;
7431         unsigned long flags;
7432
7433         spin_lock_irqsave(&priv->lock, flags);
7434         if (!(priv->measurement_status & MEASUREMENT_READY)) {
7435                 spin_unlock_irqrestore(&priv->lock, flags);
7436                 return 0;
7437         }
7438         memcpy(&measure_report, &priv->measure_report, size);
7439         priv->measurement_status = 0;
7440         spin_unlock_irqrestore(&priv->lock, flags);
7441
7442         while (size && (PAGE_SIZE - len)) {
7443                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
7444                                    PAGE_SIZE - len, 1);
7445                 len = strlen(buf);
7446                 if (PAGE_SIZE - len)
7447                         buf[len++] = '\n';
7448
7449                 ofs += 16;
7450                 size -= min(size, 16U);
7451         }
7452
7453         return len;
7454 }
7455
7456 static ssize_t store_measurement(struct device *d,
7457                                  struct device_attribute *attr,
7458                                  const char *buf, size_t count)
7459 {
7460         struct iwl_priv *priv = dev_get_drvdata(d);
7461         struct ieee80211_measurement_params params = {
7462                 .channel = le16_to_cpu(priv->active_rxon.channel),
7463                 .start_time = cpu_to_le64(priv->last_tsf),
7464                 .duration = cpu_to_le16(1),
7465         };
7466         u8 type = IWL_MEASURE_BASIC;
7467         u8 buffer[32];
7468         u8 channel;
7469
7470         if (count) {
7471                 char *p = buffer;
7472                 strncpy(buffer, buf, min(sizeof(buffer), count));
7473                 channel = simple_strtoul(p, NULL, 0);
7474                 if (channel)
7475                         params.channel = channel;
7476
7477                 p = buffer;
7478                 while (*p && *p != ' ')
7479                         p++;
7480                 if (*p)
7481                         type = simple_strtoul(p + 1, NULL, 0);
7482         }
7483
7484         IWL_DEBUG_INFO("Invoking measurement of type %d on "
7485                        "channel %d (for '%s')\n", type, params.channel, buf);
7486         iwl4965_get_measurement(priv, &params, type);
7487
7488         return count;
7489 }
7490
7491 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
7492                    show_measurement, store_measurement);
7493 #endif /* CONFIG_IWL4965_SPECTRUM_MEASUREMENT */
7494
7495 static ssize_t store_retry_rate(struct device *d,
7496                                 struct device_attribute *attr,
7497                                 const char *buf, size_t count)
7498 {
7499         struct iwl_priv *priv = dev_get_drvdata(d);
7500
7501         priv->retry_rate = simple_strtoul(buf, NULL, 0);
7502         if (priv->retry_rate <= 0)
7503                 priv->retry_rate = 1;
7504
7505         return count;
7506 }
7507
7508 static ssize_t show_retry_rate(struct device *d,
7509                                struct device_attribute *attr, char *buf)
7510 {
7511         struct iwl_priv *priv = dev_get_drvdata(d);
7512         return sprintf(buf, "%d", priv->retry_rate);
7513 }
7514
7515 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
7516                    store_retry_rate);
7517
7518 static ssize_t store_power_level(struct device *d,
7519                                  struct device_attribute *attr,
7520                                  const char *buf, size_t count)
7521 {
7522         struct iwl_priv *priv = dev_get_drvdata(d);
7523         int rc;
7524         int mode;
7525
7526         mode = simple_strtoul(buf, NULL, 0);
7527         mutex_lock(&priv->mutex);
7528
7529         if (!iwl_is_ready(priv)) {
7530                 rc = -EAGAIN;
7531                 goto out;
7532         }
7533
7534         if ((mode < 1) || (mode > IWL_POWER_LIMIT) || (mode == IWL_POWER_AC))
7535                 mode = IWL_POWER_AC;
7536         else
7537                 mode |= IWL_POWER_ENABLED;
7538
7539         if (mode != priv->power_mode) {
7540                 rc = iwl4965_send_power_mode(priv, IWL_POWER_LEVEL(mode));
7541                 if (rc) {
7542                         IWL_DEBUG_MAC80211("failed setting power mode.\n");
7543                         goto out;
7544                 }
7545                 priv->power_mode = mode;
7546         }
7547
7548         rc = count;
7549
7550  out:
7551         mutex_unlock(&priv->mutex);
7552         return rc;
7553 }
7554
7555 #define MAX_WX_STRING 80
7556
7557 /* Values are in microsecond */
7558 static const s32 timeout_duration[] = {
7559         350000,
7560         250000,
7561         75000,
7562         37000,
7563         25000,
7564 };
7565 static const s32 period_duration[] = {
7566         400000,
7567         700000,
7568         1000000,
7569         1000000,
7570         1000000
7571 };
7572
7573 static ssize_t show_power_level(struct device *d,
7574                                 struct device_attribute *attr, char *buf)
7575 {
7576         struct iwl_priv *priv = dev_get_drvdata(d);
7577         int level = IWL_POWER_LEVEL(priv->power_mode);
7578         char *p = buf;
7579
7580         p += sprintf(p, "%d ", level);
7581         switch (level) {
7582         case IWL_POWER_MODE_CAM:
7583         case IWL_POWER_AC:
7584                 p += sprintf(p, "(AC)");
7585                 break;
7586         case IWL_POWER_BATTERY:
7587                 p += sprintf(p, "(BATTERY)");
7588                 break;
7589         default:
7590                 p += sprintf(p,
7591                              "(Timeout %dms, Period %dms)",
7592                              timeout_duration[level - 1] / 1000,
7593                              period_duration[level - 1] / 1000);
7594         }
7595
7596         if (!(priv->power_mode & IWL_POWER_ENABLED))
7597                 p += sprintf(p, " OFF\n");
7598         else
7599                 p += sprintf(p, " \n");
7600
7601         return (p - buf + 1);
7602
7603 }
7604
7605 static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR, show_power_level,
7606                    store_power_level);
7607
7608 static ssize_t show_channels(struct device *d,
7609                              struct device_attribute *attr, char *buf)
7610 {
7611         /* all this shit doesn't belong into sysfs anyway */
7612         return 0;
7613 }
7614
7615 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
7616
7617 static ssize_t show_statistics(struct device *d,
7618                                struct device_attribute *attr, char *buf)
7619 {
7620         struct iwl_priv *priv = dev_get_drvdata(d);
7621         u32 size = sizeof(struct iwl4965_notif_statistics);
7622         u32 len = 0, ofs = 0;
7623         u8 *data = (u8 *) & priv->statistics;
7624         int rc = 0;
7625
7626         if (!iwl_is_alive(priv))
7627                 return -EAGAIN;
7628
7629         mutex_lock(&priv->mutex);
7630         rc = iwl4965_send_statistics_request(priv);
7631         mutex_unlock(&priv->mutex);
7632
7633         if (rc) {
7634                 len = sprintf(buf,
7635                               "Error sending statistics request: 0x%08X\n", rc);
7636                 return len;
7637         }
7638
7639         while (size && (PAGE_SIZE - len)) {
7640                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
7641                                    PAGE_SIZE - len, 1);
7642                 len = strlen(buf);
7643                 if (PAGE_SIZE - len)
7644                         buf[len++] = '\n';
7645
7646                 ofs += 16;
7647                 size -= min(size, 16U);
7648         }
7649
7650         return len;
7651 }
7652
7653 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
7654
7655 static ssize_t show_antenna(struct device *d,
7656                             struct device_attribute *attr, char *buf)
7657 {
7658         struct iwl_priv *priv = dev_get_drvdata(d);
7659
7660         if (!iwl_is_alive(priv))
7661                 return -EAGAIN;
7662
7663         return sprintf(buf, "%d\n", priv->antenna);
7664 }
7665
7666 static ssize_t store_antenna(struct device *d,
7667                              struct device_attribute *attr,
7668                              const char *buf, size_t count)
7669 {
7670         int ant;
7671         struct iwl_priv *priv = dev_get_drvdata(d);
7672
7673         if (count == 0)
7674                 return 0;
7675
7676         if (sscanf(buf, "%1i", &ant) != 1) {
7677                 IWL_DEBUG_INFO("not in hex or decimal form.\n");
7678                 return count;
7679         }
7680
7681         if ((ant >= 0) && (ant <= 2)) {
7682                 IWL_DEBUG_INFO("Setting antenna select to %d.\n", ant);
7683                 priv->antenna = (enum iwl4965_antenna)ant;
7684         } else
7685                 IWL_DEBUG_INFO("Bad antenna select value %d.\n", ant);
7686
7687
7688         return count;
7689 }
7690
7691 static DEVICE_ATTR(antenna, S_IWUSR | S_IRUGO, show_antenna, store_antenna);
7692
7693 static ssize_t show_status(struct device *d,
7694                            struct device_attribute *attr, char *buf)
7695 {
7696         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
7697         if (!iwl_is_alive(priv))
7698                 return -EAGAIN;
7699         return sprintf(buf, "0x%08x\n", (int)priv->status);
7700 }
7701
7702 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
7703
7704 static ssize_t dump_error_log(struct device *d,
7705                               struct device_attribute *attr,
7706                               const char *buf, size_t count)
7707 {
7708         char *p = (char *)buf;
7709
7710         if (p[0] == '1')
7711                 iwl4965_dump_nic_error_log((struct iwl_priv *)d->driver_data);
7712
7713         return strnlen(buf, count);
7714 }
7715
7716 static DEVICE_ATTR(dump_errors, S_IWUSR, NULL, dump_error_log);
7717
7718 static ssize_t dump_event_log(struct device *d,
7719                               struct device_attribute *attr,
7720                               const char *buf, size_t count)
7721 {
7722         char *p = (char *)buf;
7723
7724         if (p[0] == '1')
7725                 iwl4965_dump_nic_event_log((struct iwl_priv *)d->driver_data);
7726
7727         return strnlen(buf, count);
7728 }
7729
7730 static DEVICE_ATTR(dump_events, S_IWUSR, NULL, dump_event_log);
7731
7732 /*****************************************************************************
7733  *
7734  * driver setup and teardown
7735  *
7736  *****************************************************************************/
7737
7738 static void iwl4965_setup_deferred_work(struct iwl_priv *priv)
7739 {
7740         priv->workqueue = create_workqueue(DRV_NAME);
7741
7742         init_waitqueue_head(&priv->wait_command_queue);
7743
7744         INIT_WORK(&priv->up, iwl4965_bg_up);
7745         INIT_WORK(&priv->restart, iwl4965_bg_restart);
7746         INIT_WORK(&priv->rx_replenish, iwl4965_bg_rx_replenish);
7747         INIT_WORK(&priv->scan_completed, iwl4965_bg_scan_completed);
7748         INIT_WORK(&priv->request_scan, iwl4965_bg_request_scan);
7749         INIT_WORK(&priv->abort_scan, iwl4965_bg_abort_scan);
7750         INIT_WORK(&priv->rf_kill, iwl4965_bg_rf_kill);
7751         INIT_WORK(&priv->beacon_update, iwl4965_bg_beacon_update);
7752         INIT_DELAYED_WORK(&priv->post_associate, iwl4965_bg_post_associate);
7753         INIT_DELAYED_WORK(&priv->init_alive_start, iwl4965_bg_init_alive_start);
7754         INIT_DELAYED_WORK(&priv->alive_start, iwl4965_bg_alive_start);
7755         INIT_DELAYED_WORK(&priv->scan_check, iwl4965_bg_scan_check);
7756
7757         iwl4965_hw_setup_deferred_work(priv);
7758
7759         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
7760                      iwl4965_irq_tasklet, (unsigned long)priv);
7761 }
7762
7763 static void iwl4965_cancel_deferred_work(struct iwl_priv *priv)
7764 {
7765         iwl4965_hw_cancel_deferred_work(priv);
7766
7767         cancel_delayed_work_sync(&priv->init_alive_start);
7768         cancel_delayed_work(&priv->scan_check);
7769         cancel_delayed_work(&priv->alive_start);
7770         cancel_delayed_work(&priv->post_associate);
7771         cancel_work_sync(&priv->beacon_update);
7772 }
7773
7774 static struct attribute *iwl4965_sysfs_entries[] = {
7775         &dev_attr_antenna.attr,
7776         &dev_attr_channels.attr,
7777         &dev_attr_dump_errors.attr,
7778         &dev_attr_dump_events.attr,
7779         &dev_attr_flags.attr,
7780         &dev_attr_filter_flags.attr,
7781 #ifdef CONFIG_IWL4965_SPECTRUM_MEASUREMENT
7782         &dev_attr_measurement.attr,
7783 #endif
7784         &dev_attr_power_level.attr,
7785         &dev_attr_retry_rate.attr,
7786         &dev_attr_rs_window.attr,
7787         &dev_attr_statistics.attr,
7788         &dev_attr_status.attr,
7789         &dev_attr_temperature.attr,
7790         &dev_attr_tx_power.attr,
7791
7792         NULL
7793 };
7794
7795 static struct attribute_group iwl4965_attribute_group = {
7796         .name = NULL,           /* put in device directory */
7797         .attrs = iwl4965_sysfs_entries,
7798 };
7799
7800 static struct ieee80211_ops iwl4965_hw_ops = {
7801         .tx = iwl4965_mac_tx,
7802         .start = iwl4965_mac_start,
7803         .stop = iwl4965_mac_stop,
7804         .add_interface = iwl4965_mac_add_interface,
7805         .remove_interface = iwl4965_mac_remove_interface,
7806         .config = iwl4965_mac_config,
7807         .config_interface = iwl4965_mac_config_interface,
7808         .configure_filter = iwl4965_configure_filter,
7809         .set_key = iwl4965_mac_set_key,
7810         .update_tkip_key = iwl4965_mac_update_tkip_key,
7811         .get_stats = iwl4965_mac_get_stats,
7812         .get_tx_stats = iwl4965_mac_get_tx_stats,
7813         .conf_tx = iwl4965_mac_conf_tx,
7814         .get_tsf = iwl4965_mac_get_tsf,
7815         .reset_tsf = iwl4965_mac_reset_tsf,
7816         .beacon_update = iwl4965_mac_beacon_update,
7817         .bss_info_changed = iwl4965_bss_info_changed,
7818 #ifdef CONFIG_IWL4965_HT
7819         .ampdu_action = iwl4965_mac_ampdu_action,
7820 #endif  /* CONFIG_IWL4965_HT */
7821         .hw_scan = iwl4965_mac_hw_scan
7822 };
7823
7824 static int iwl4965_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
7825 {
7826         int err = 0;
7827         struct iwl_priv *priv;
7828         struct ieee80211_hw *hw;
7829         struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
7830         unsigned long flags;
7831         DECLARE_MAC_BUF(mac);
7832
7833         /************************
7834          * 1. Allocating HW data
7835          ************************/
7836
7837         /* Disabling hardware scan means that mac80211 will perform scans
7838          * "the hard way", rather than using device's scan. */
7839         if (cfg->mod_params->disable_hw_scan) {
7840                 IWL_DEBUG_INFO("Disabling hw_scan\n");
7841                 iwl4965_hw_ops.hw_scan = NULL;
7842         }
7843
7844         hw = iwl_alloc_all(cfg, &iwl4965_hw_ops);
7845         if (!hw) {
7846                 err = -ENOMEM;
7847                 goto out;
7848         }
7849         priv = hw->priv;
7850         /* At this point both hw and priv are allocated. */
7851
7852         SET_IEEE80211_DEV(hw, &pdev->dev);
7853
7854         IWL_DEBUG_INFO("*** LOAD DRIVER ***\n");
7855         priv->cfg = cfg;
7856         priv->pci_dev = pdev;
7857
7858 #ifdef CONFIG_IWLWIFI_DEBUG
7859         iwl_debug_level = priv->cfg->mod_params->debug;
7860         atomic_set(&priv->restrict_refcnt, 0);
7861 #endif
7862
7863         /**************************
7864          * 2. Initializing PCI bus
7865          **************************/
7866         if (pci_enable_device(pdev)) {
7867                 err = -ENODEV;
7868                 goto out_ieee80211_free_hw;
7869         }
7870
7871         pci_set_master(pdev);
7872
7873         err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
7874         if (!err)
7875                 err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
7876                 if (err) {
7877                         printk(KERN_WARNING DRV_NAME
7878                                 ": No suitable DMA available.\n");
7879                         goto out_pci_disable_device;
7880         }
7881
7882         err = pci_request_regions(pdev, DRV_NAME);
7883         if (err)
7884                 goto out_pci_disable_device;
7885
7886         pci_set_drvdata(pdev, priv);
7887
7888         /* We disable the RETRY_TIMEOUT register (0x41) to keep
7889          * PCI Tx retries from interfering with C3 CPU state */
7890         pci_write_config_byte(pdev, 0x41, 0x00);
7891
7892         /***********************
7893          * 3. Read REV register
7894          ***********************/
7895         priv->hw_base = pci_iomap(pdev, 0, 0);
7896         if (!priv->hw_base) {
7897                 err = -ENODEV;
7898                 goto out_pci_release_regions;
7899         }
7900
7901         IWL_DEBUG_INFO("pci_resource_len = 0x%08llx\n",
7902                 (unsigned long long) pci_resource_len(pdev, 0));
7903         IWL_DEBUG_INFO("pci_resource_base = %p\n", priv->hw_base);
7904
7905         printk(KERN_INFO DRV_NAME
7906                 ": Detected Intel Wireless WiFi Link %s\n", priv->cfg->name);
7907
7908         /*****************
7909          * 4. Read EEPROM
7910          *****************/
7911         /* nic init */
7912         iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
7913                 CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
7914
7915         iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
7916         err = iwl_poll_bit(priv, CSR_GP_CNTRL,
7917                 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
7918                 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
7919         if (err < 0) {
7920                 IWL_DEBUG_INFO("Failed to init the card\n");
7921                 goto out_iounmap;
7922         }
7923         /* Read the EEPROM */
7924         err = iwl_eeprom_init(priv);
7925         if (err) {
7926                 IWL_ERROR("Unable to init EEPROM\n");
7927                 goto out_iounmap;
7928         }
7929         /* MAC Address location in EEPROM same for 3945/4965 */
7930         iwl_eeprom_get_mac(priv, priv->mac_addr);
7931         IWL_DEBUG_INFO("MAC address: %s\n", print_mac(mac, priv->mac_addr));
7932         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
7933
7934         /************************
7935          * 5. Setup HW constants
7936          ************************/
7937         /* Device-specific setup */
7938         if (iwl4965_hw_set_hw_setting(priv)) {
7939                 IWL_ERROR("failed to set hw settings\n");
7940                 goto out_iounmap;
7941         }
7942
7943         /*******************
7944          * 6. Setup hw/priv
7945          *******************/
7946
7947         err = iwl_setup(priv);
7948         if (err)
7949                 goto out_unset_hw_settings;
7950         /* At this point both hw and priv are initialized. */
7951
7952         /**********************************
7953          * 7. Initialize module parameters
7954          **********************************/
7955
7956         /* Disable radio (SW RF KILL) via parameter when loading driver */
7957         if (priv->cfg->mod_params->disable) {
7958                 set_bit(STATUS_RF_KILL_SW, &priv->status);
7959                 IWL_DEBUG_INFO("Radio disabled.\n");
7960         }
7961
7962         if (priv->cfg->mod_params->enable_qos)
7963                 priv->qos_data.qos_enable = 1;
7964
7965         /********************
7966          * 8. Setup services
7967          ********************/
7968         spin_lock_irqsave(&priv->lock, flags);
7969         iwl4965_disable_interrupts(priv);
7970         spin_unlock_irqrestore(&priv->lock, flags);
7971
7972         err = sysfs_create_group(&pdev->dev.kobj, &iwl4965_attribute_group);
7973         if (err) {
7974                 IWL_ERROR("failed to create sysfs device attributes\n");
7975                 goto out_unset_hw_settings;
7976         }
7977
7978         err = iwl_dbgfs_register(priv, DRV_NAME);
7979         if (err) {
7980                 IWL_ERROR("failed to create debugfs files\n");
7981                 goto out_remove_sysfs;
7982         }
7983
7984         iwl4965_setup_deferred_work(priv);
7985         iwl4965_setup_rx_handlers(priv);
7986
7987         /********************
7988          * 9. Conclude
7989          ********************/
7990         pci_save_state(pdev);
7991         pci_disable_device(pdev);
7992
7993         /* notify iwlcore to init */
7994         iwlcore_low_level_notify(priv, IWLCORE_INIT_EVT);
7995         return 0;
7996
7997  out_remove_sysfs:
7998         sysfs_remove_group(&pdev->dev.kobj, &iwl4965_attribute_group);
7999  out_unset_hw_settings:
8000         iwl4965_unset_hw_setting(priv);
8001  out_iounmap:
8002         pci_iounmap(pdev, priv->hw_base);
8003  out_pci_release_regions:
8004         pci_release_regions(pdev);
8005         pci_set_drvdata(pdev, NULL);
8006  out_pci_disable_device:
8007         pci_disable_device(pdev);
8008  out_ieee80211_free_hw:
8009         ieee80211_free_hw(priv->hw);
8010  out:
8011         return err;
8012 }
8013
8014 static void __devexit iwl4965_pci_remove(struct pci_dev *pdev)
8015 {
8016         struct iwl_priv *priv = pci_get_drvdata(pdev);
8017         struct list_head *p, *q;
8018         int i;
8019         unsigned long flags;
8020
8021         if (!priv)
8022                 return;
8023
8024         IWL_DEBUG_INFO("*** UNLOAD DRIVER ***\n");
8025
8026         if (priv->mac80211_registered) {
8027                 ieee80211_unregister_hw(priv->hw);
8028                 priv->mac80211_registered = 0;
8029         }
8030
8031         set_bit(STATUS_EXIT_PENDING, &priv->status);
8032
8033         iwl4965_down(priv);
8034
8035         /* make sure we flush any pending irq or
8036          * tasklet for the driver
8037          */
8038         spin_lock_irqsave(&priv->lock, flags);
8039         iwl4965_disable_interrupts(priv);
8040         spin_unlock_irqrestore(&priv->lock, flags);
8041
8042         iwl_synchronize_irq(priv);
8043
8044         /* Free MAC hash list for ADHOC */
8045         for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++) {
8046                 list_for_each_safe(p, q, &priv->ibss_mac_hash[i]) {
8047                         list_del(p);
8048                         kfree(list_entry(p, struct iwl4965_ibss_seq, list));
8049                 }
8050         }
8051
8052         iwlcore_low_level_notify(priv, IWLCORE_REMOVE_EVT);
8053         iwl_dbgfs_unregister(priv);
8054         sysfs_remove_group(&pdev->dev.kobj, &iwl4965_attribute_group);
8055
8056         iwl4965_dealloc_ucode_pci(priv);
8057
8058         if (priv->rxq.bd)
8059                 iwl4965_rx_queue_free(priv, &priv->rxq);
8060         iwl4965_hw_txq_ctx_free(priv);
8061
8062         iwl4965_unset_hw_setting(priv);
8063         iwlcore_clear_stations_table(priv);
8064
8065
8066         /*netif_stop_queue(dev); */
8067         flush_workqueue(priv->workqueue);
8068
8069         /* ieee80211_unregister_hw calls iwl4965_mac_stop, which flushes
8070          * priv->workqueue... so we can't take down the workqueue
8071          * until now... */
8072         destroy_workqueue(priv->workqueue);
8073         priv->workqueue = NULL;
8074
8075         pci_iounmap(pdev, priv->hw_base);
8076         pci_release_regions(pdev);
8077         pci_disable_device(pdev);
8078         pci_set_drvdata(pdev, NULL);
8079
8080         iwl_free_channel_map(priv);
8081         iwl4965_free_geos(priv);
8082
8083         if (priv->ibss_beacon)
8084                 dev_kfree_skb(priv->ibss_beacon);
8085
8086         ieee80211_free_hw(priv->hw);
8087 }
8088
8089 #ifdef CONFIG_PM
8090
8091 static int iwl4965_pci_suspend(struct pci_dev *pdev, pm_message_t state)
8092 {
8093         struct iwl_priv *priv = pci_get_drvdata(pdev);
8094
8095         if (priv->is_open) {
8096                 set_bit(STATUS_IN_SUSPEND, &priv->status);
8097                 iwl4965_mac_stop(priv->hw);
8098                 priv->is_open = 1;
8099         }
8100
8101         pci_set_power_state(pdev, PCI_D3hot);
8102
8103         return 0;
8104 }
8105
8106 static int iwl4965_pci_resume(struct pci_dev *pdev)
8107 {
8108         struct iwl_priv *priv = pci_get_drvdata(pdev);
8109
8110         pci_set_power_state(pdev, PCI_D0);
8111
8112         if (priv->is_open)
8113                 iwl4965_mac_start(priv->hw);
8114
8115         clear_bit(STATUS_IN_SUSPEND, &priv->status);
8116         return 0;
8117 }
8118
8119 #endif /* CONFIG_PM */
8120
8121 /*****************************************************************************
8122  *
8123  * driver and module entry point
8124  *
8125  *****************************************************************************/
8126
8127 static struct pci_driver iwl4965_driver = {
8128         .name = DRV_NAME,
8129         .id_table = iwl4965_hw_card_ids,
8130         .probe = iwl4965_pci_probe,
8131         .remove = __devexit_p(iwl4965_pci_remove),
8132 #ifdef CONFIG_PM
8133         .suspend = iwl4965_pci_suspend,
8134         .resume = iwl4965_pci_resume,
8135 #endif
8136 };
8137
8138 static int __init iwl4965_init(void)
8139 {
8140
8141         int ret;
8142         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
8143         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
8144
8145         ret = iwl4965_rate_control_register();
8146         if (ret) {
8147                 IWL_ERROR("Unable to register rate control algorithm: %d\n", ret);
8148                 return ret;
8149         }
8150
8151         ret = pci_register_driver(&iwl4965_driver);
8152         if (ret) {
8153                 IWL_ERROR("Unable to initialize PCI module\n");
8154                 goto error_register;
8155         }
8156 #ifdef CONFIG_IWLWIFI_DEBUG
8157         ret = driver_create_file(&iwl4965_driver.driver, &driver_attr_debug_level);
8158         if (ret) {
8159                 IWL_ERROR("Unable to create driver sysfs file\n");
8160                 goto error_debug;
8161         }
8162 #endif
8163
8164         return ret;
8165
8166 #ifdef CONFIG_IWLWIFI_DEBUG
8167 error_debug:
8168         pci_unregister_driver(&iwl4965_driver);
8169 #endif
8170 error_register:
8171         iwl4965_rate_control_unregister();
8172         return ret;
8173 }
8174
8175 static void __exit iwl4965_exit(void)
8176 {
8177 #ifdef CONFIG_IWLWIFI_DEBUG
8178         driver_remove_file(&iwl4965_driver.driver, &driver_attr_debug_level);
8179 #endif
8180         pci_unregister_driver(&iwl4965_driver);
8181         iwl4965_rate_control_unregister();
8182 }
8183
8184 module_exit(iwl4965_exit);
8185 module_init(iwl4965_init);