git.oblomov.eu Git - linux-2.6/blob - drivers/net/wireless/iwlwifi/iwl-agn.c

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2009 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  *  Intel Linux Wireless <ilw@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/init.h>
  33 #include <linux/pci.h>
  34 #include <linux/dma-mapping.h>
  35 #include <linux/delay.h>
  36 #include <linux/skbuff.h>
  37 #include <linux/netdevice.h>
  38 #include <linux/wireless.h>
  39 #include <linux/firmware.h>
  40 #include <linux/etherdevice.h>
  41 #include <linux/if_arp.h>
  42
  43 #include <net/mac80211.h>
  44
  45 #include <asm/div64.h>
  46
  47 #define DRV_NAME        "iwlagn"
  48
  49 #include "iwl-eeprom.h"
  50 #include "iwl-dev.h"
  51 #include "iwl-core.h"
  52 #include "iwl-io.h"
  53 #include "iwl-helpers.h"
  54 #include "iwl-sta.h"
  55 #include "iwl-calib.h"
  56
  57
  58 /******************************************************************************
  59  *
  60  * module boiler plate
  61  *
  62  ******************************************************************************/
  63
  64 /*
  65  * module name, copyright, version, etc.
  66  */
  67 #define DRV_DESCRIPTION "Intel(R) Wireless WiFi Link AGN driver for Linux"
  68
  69 #ifdef CONFIG_IWLWIFI_DEBUG
  70 #define VD "d"
  71 #else
  72 #define VD
  73 #endif
  74
  75 #ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
  76 #define VS "s"
  77 #else
  78 #define VS
  79 #endif
  80
  81 #define DRV_VERSION     IWLWIFI_VERSION VD VS
  82
  83
  84 MODULE_DESCRIPTION(DRV_DESCRIPTION);
  85 MODULE_VERSION(DRV_VERSION);
  86 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
  87 MODULE_LICENSE("GPL");
  88 MODULE_ALIAS("iwl4965");
  89
  90 /*************** STATION TABLE MANAGEMENT ****
  91  * mac80211 should be examined to determine if sta_info is duplicating
  92  * the functionality provided here
  93  */
  94
  95 /**************************************************************/
  96
  97 /**
  98  * iwl_commit_rxon - commit staging_rxon to hardware
  99  *
 100  * The RXON command in staging_rxon is committed to the hardware and
 101  * the active_rxon structure is updated with the new data.  This
 102  * function correctly transitions out of the RXON_ASSOC_MSK state if
 103  * a HW tune is required based on the RXON structure changes.
 104  */
 105 int iwl_commit_rxon(struct iwl_priv *priv)
 106 {
 107         /* cast away the const for active_rxon in this function */
 108         struct iwl_rxon_cmd *active_rxon = (void *)&priv->active_rxon;
 109         int ret;
 110         bool new_assoc =
 111                 !!(priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK);
 112
 113         if (!iwl_is_alive(priv))
 114                 return -EBUSY;
 115
 116         /* always get timestamp with Rx frame */
 117         priv->staging_rxon.flags |= RXON_FLG_TSF2HOST_MSK;
 118         /* allow CTS-to-self if possible. this is relevant only for
 119          * 5000, but will not damage 4965 */
 120         priv->staging_rxon.flags |= RXON_FLG_SELF_CTS_EN;
 121
 122         ret = iwl_check_rxon_cmd(priv);
 123         if (ret) {
 124                 IWL_ERR(priv, "Invalid RXON configuration.  Not committing.\n");
 125                 return -EINVAL;
 126         }
 127
 128         /* If we don't need to send a full RXON, we can use
 129          * iwl_rxon_assoc_cmd which is used to reconfigure filter
 130          * and other flags for the current radio configuration. */
 131         if (!iwl_full_rxon_required(priv)) {
 132                 ret = iwl_send_rxon_assoc(priv);
 133                 if (ret) {
 134                         IWL_ERR(priv, "Error setting RXON_ASSOC (%d)\n", ret);
 135                         return ret;
 136                 }
 137
 138                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
 139                 return 0;
 140         }
 141
 142         /* station table will be cleared */
 143         priv->assoc_station_added = 0;
 144
 145         /* If we are currently associated and the new config requires
 146          * an RXON_ASSOC and the new config wants the associated mask enabled,
 147          * we must clear the associated from the active configuration
 148          * before we apply the new config */
 149         if (iwl_is_associated(priv) && new_assoc) {
 150                 IWL_DEBUG_INFO(priv, "Toggling associated bit on current RXON\n");
 151                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
 152
 153                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON,
 154                                       sizeof(struct iwl_rxon_cmd),
 155                                       &priv->active_rxon);
 156
 157                 /* If the mask clearing failed then we set
 158                  * active_rxon back to what it was previously */
 159                 if (ret) {
 160                         active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
 161                         IWL_ERR(priv, "Error clearing ASSOC_MSK (%d)\n", ret);
 162                         return ret;
 163                 }
 164         }
 165
 166         IWL_DEBUG_INFO(priv, "Sending RXON\n"
 167                        "* with%s RXON_FILTER_ASSOC_MSK\n"
 168                        "* channel = %d\n"
 169                        "* bssid = %pM\n",
 170                        (new_assoc ? "" : "out"),
 171                        le16_to_cpu(priv->staging_rxon.channel),
 172                        priv->staging_rxon.bssid_addr);
 173
 174         iwl_set_rxon_hwcrypto(priv, !priv->hw_params.sw_crypto);
 175
 176         /* Apply the new configuration
 177          * RXON unassoc clears the station table in uCode, send it before
 178          * we add the bcast station. If assoc bit is set, we will send RXON
 179          * after having added the bcast and bssid station.
 180          */
 181         if (!new_assoc) {
 182                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON,
 183                               sizeof(struct iwl_rxon_cmd), &priv->staging_rxon);
 184                 if (ret) {
 185                         IWL_ERR(priv, "Error setting new RXON (%d)\n", ret);
 186                         return ret;
 187                 }
 188                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
 189         }
 190
 191         priv->cfg->ops->smgmt->clear_station_table(priv);
 192
 193         if (!priv->error_recovering)
 194                 priv->start_calib = 0;
 195
 196         /* Add the broadcast address so we can send broadcast frames */
 197         if (iwl_rxon_add_station(priv, iwl_bcast_addr, 0) ==
 198                                                 IWL_INVALID_STATION) {
 199                 IWL_ERR(priv, "Error adding BROADCAST address for transmit.\n");
 200                 return -EIO;
 201         }
 202
 203         /* If we have set the ASSOC_MSK and we are in BSS mode then
 204          * add the IWL_AP_ID to the station rate table */
 205         if (new_assoc) {
 206                 if (priv->iw_mode == NL80211_IFTYPE_STATION) {
 207                         ret = iwl_rxon_add_station(priv,
 208                                            priv->active_rxon.bssid_addr, 1);
 209                         if (ret == IWL_INVALID_STATION) {
 210                                 IWL_ERR(priv,
 211                                         "Error adding AP address for TX.\n");
 212                                 return -EIO;
 213                         }
 214                         priv->assoc_station_added = 1;
 215                         if (priv->default_wep_key &&
 216                             iwl_send_static_wepkey_cmd(priv, 0))
 217                                 IWL_ERR(priv,
 218                                         "Could not send WEP static key.\n");
 219                 }
 220
 221                 /* Apply the new configuration
 222                  * RXON assoc doesn't clear the station table in uCode,
 223                  */
 224                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON,
 225                               sizeof(struct iwl_rxon_cmd), &priv->staging_rxon);
 226                 if (ret) {
 227                         IWL_ERR(priv, "Error setting new RXON (%d)\n", ret);
 228                         return ret;
 229                 }
 230                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
 231         }
 232
 233         iwl_init_sensitivity(priv);
 234
 235         /* If we issue a new RXON command which required a tune then we must
 236          * send a new TXPOWER command or we won't be able to Tx any frames */
 237         ret = iwl_set_tx_power(priv, priv->tx_power_user_lmt, true);
 238         if (ret) {
 239                 IWL_ERR(priv, "Error sending TX power (%d)\n", ret);
 240                 return ret;
 241         }
 242
 243         return 0;
 244 }
 245
 246 void iwl_update_chain_flags(struct iwl_priv *priv)
 247 {
 248
 249         if (priv->cfg->ops->hcmd->set_rxon_chain)
 250                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
 251         iwlcore_commit_rxon(priv);
 252 }
 253
 254 static void iwl_clear_free_frames(struct iwl_priv *priv)
 255 {
 256         struct list_head *element;
 257
 258         IWL_DEBUG_INFO(priv, "%d frames on pre-allocated heap on clear.\n",
 259                        priv->frames_count);
 260
 261         while (!list_empty(&priv->free_frames)) {
 262                 element = priv->free_frames.next;
 263                 list_del(element);
 264                 kfree(list_entry(element, struct iwl_frame, list));
 265                 priv->frames_count--;
 266         }
 267
 268         if (priv->frames_count) {
 269                 IWL_WARN(priv, "%d frames still in use.  Did we lose one?\n",
 270                             priv->frames_count);
 271                 priv->frames_count = 0;
 272         }
 273 }
 274
 275 static struct iwl_frame *iwl_get_free_frame(struct iwl_priv *priv)
 276 {
 277         struct iwl_frame *frame;
 278         struct list_head *element;
 279         if (list_empty(&priv->free_frames)) {
 280                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
 281                 if (!frame) {
 282                         IWL_ERR(priv, "Could not allocate frame!\n");
 283                         return NULL;
 284                 }
 285
 286                 priv->frames_count++;
 287                 return frame;
 288         }
 289
 290         element = priv->free_frames.next;
 291         list_del(element);
 292         return list_entry(element, struct iwl_frame, list);
 293 }
 294
 295 static void iwl_free_frame(struct iwl_priv *priv, struct iwl_frame *frame)
 296 {
 297         memset(frame, 0, sizeof(*frame));
 298         list_add(&frame->list, &priv->free_frames);
 299 }
 300
 301 static unsigned int iwl_fill_beacon_frame(struct iwl_priv *priv,
 302                                           struct ieee80211_hdr *hdr,
 303                                           int left)
 304 {
 305         if (!iwl_is_associated(priv) || !priv->ibss_beacon ||
 306             ((priv->iw_mode != NL80211_IFTYPE_ADHOC) &&
 307              (priv->iw_mode != NL80211_IFTYPE_AP)))
 308                 return 0;
 309
 310         if (priv->ibss_beacon->len > left)
 311                 return 0;
 312
 313         memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
 314
 315         return priv->ibss_beacon->len;
 316 }
 317
 318 static unsigned int iwl_hw_get_beacon_cmd(struct iwl_priv *priv,
 319                                        struct iwl_frame *frame, u8 rate)
 320 {
 321         struct iwl_tx_beacon_cmd *tx_beacon_cmd;
 322         unsigned int frame_size;
 323
 324         tx_beacon_cmd = &frame->u.beacon;
 325         memset(tx_beacon_cmd, 0, sizeof(*tx_beacon_cmd));
 326
 327         tx_beacon_cmd->tx.sta_id = priv->hw_params.bcast_sta_id;
 328         tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
 329
 330         frame_size = iwl_fill_beacon_frame(priv, tx_beacon_cmd->frame,
 331                                 sizeof(frame->u) - sizeof(*tx_beacon_cmd));
 332
 333         BUG_ON(frame_size > MAX_MPDU_SIZE);
 334         tx_beacon_cmd->tx.len = cpu_to_le16((u16)frame_size);
 335
 336         if ((rate == IWL_RATE_1M_PLCP) || (rate >= IWL_RATE_2M_PLCP))
 337                 tx_beacon_cmd->tx.rate_n_flags =
 338                         iwl_hw_set_rate_n_flags(rate, RATE_MCS_CCK_MSK);
 339         else
 340                 tx_beacon_cmd->tx.rate_n_flags =
 341                         iwl_hw_set_rate_n_flags(rate, 0);
 342
 343         tx_beacon_cmd->tx.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK |
 344                                      TX_CMD_FLG_TSF_MSK |
 345                                      TX_CMD_FLG_STA_RATE_MSK;
 346
 347         return sizeof(*tx_beacon_cmd) + frame_size;
 348 }
 349 static int iwl_send_beacon_cmd(struct iwl_priv *priv)
 350 {
 351         struct iwl_frame *frame;
 352         unsigned int frame_size;
 353         int rc;
 354         u8 rate;
 355
 356         frame = iwl_get_free_frame(priv);
 357
 358         if (!frame) {
 359                 IWL_ERR(priv, "Could not obtain free frame buffer for beacon "
 360                           "command.\n");
 361                 return -ENOMEM;
 362         }
 363
 364         rate = iwl_rate_get_lowest_plcp(priv);
 365
 366         frame_size = iwl_hw_get_beacon_cmd(priv, frame, rate);
 367
 368         rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
 369                               &frame->u.cmd[0]);
 370
 371         iwl_free_frame(priv, frame);
 372
 373         return rc;
 374 }
 375
 376 static inline dma_addr_t iwl_tfd_tb_get_addr(struct iwl_tfd *tfd, u8 idx)
 377 {
 378         struct iwl_tfd_tb *tb = &tfd->tbs[idx];
 379
 380         dma_addr_t addr = get_unaligned_le32(&tb->lo);
 381         if (sizeof(dma_addr_t) > sizeof(u32))
 382                 addr |=
 383                 ((dma_addr_t)(le16_to_cpu(tb->hi_n_len) & 0xF) << 16) << 16;
 384
 385         return addr;
 386 }
 387
 388 static inline u16 iwl_tfd_tb_get_len(struct iwl_tfd *tfd, u8 idx)
 389 {
 390         struct iwl_tfd_tb *tb = &tfd->tbs[idx];
 391
 392         return le16_to_cpu(tb->hi_n_len) >> 4;
 393 }
 394
 395 static inline void iwl_tfd_set_tb(struct iwl_tfd *tfd, u8 idx,
 396                                   dma_addr_t addr, u16 len)
 397 {
 398         struct iwl_tfd_tb *tb = &tfd->tbs[idx];
 399         u16 hi_n_len = len << 4;
 400
 401         put_unaligned_le32(addr, &tb->lo);
 402         if (sizeof(dma_addr_t) > sizeof(u32))
 403                 hi_n_len |= ((addr >> 16) >> 16) & 0xF;
 404
 405         tb->hi_n_len = cpu_to_le16(hi_n_len);
 406
 407         tfd->num_tbs = idx + 1;
 408 }
 409
 410 static inline u8 iwl_tfd_get_num_tbs(struct iwl_tfd *tfd)
 411 {
 412         return tfd->num_tbs & 0x1f;
 413 }
 414
 415 /**
 416  * iwl_hw_txq_free_tfd - Free all chunks referenced by TFD [txq->q.read_ptr]
 417  * @priv - driver private data
 418  * @txq - tx queue
 419  *
 420  * Does NOT advance any TFD circular buffer read/write indexes
 421  * Does NOT free the TFD itself (which is within circular buffer)
 422  */
 423 void iwl_hw_txq_free_tfd(struct iwl_priv *priv, struct iwl_tx_queue *txq)
 424 {
 425         struct iwl_tfd *tfd_tmp = (struct iwl_tfd *)txq->tfds;
 426         struct iwl_tfd *tfd;
 427         struct pci_dev *dev = priv->pci_dev;
 428         int index = txq->q.read_ptr;
 429         int i;
 430         int num_tbs;
 431
 432         tfd = &tfd_tmp[index];
 433
 434         /* Sanity check on number of chunks */
 435         num_tbs = iwl_tfd_get_num_tbs(tfd);
 436
 437         if (num_tbs >= IWL_NUM_OF_TBS) {
 438                 IWL_ERR(priv, "Too many chunks: %i\n", num_tbs);
 439                 /* @todo issue fatal error, it is quite serious situation */
 440                 return;
 441         }
 442
 443         /* Unmap tx_cmd */
 444         if (num_tbs)
 445                 pci_unmap_single(dev,
 446                                 pci_unmap_addr(&txq->cmd[index]->meta, mapping),
 447                                 pci_unmap_len(&txq->cmd[index]->meta, len),
 448                                 PCI_DMA_BIDIRECTIONAL);
 449
 450         /* Unmap chunks, if any. */
 451         for (i = 1; i < num_tbs; i++) {
 452                 pci_unmap_single(dev, iwl_tfd_tb_get_addr(tfd, i),
 453                                 iwl_tfd_tb_get_len(tfd, i), PCI_DMA_TODEVICE);
 454
 455                 if (txq->txb) {
 456                         dev_kfree_skb(txq->txb[txq->q.read_ptr].skb[i - 1]);
 457                         txq->txb[txq->q.read_ptr].skb[i - 1] = NULL;
 458                 }
 459         }
 460 }
 461
 462 int iwl_hw_txq_attach_buf_to_tfd(struct iwl_priv *priv,
 463                                  struct iwl_tx_queue *txq,
 464                                  dma_addr_t addr, u16 len,
 465                                  u8 reset, u8 pad)
 466 {
 467         struct iwl_queue *q;
 468         struct iwl_tfd *tfd, *tfd_tmp;
 469         u32 num_tbs;
 470
 471         q = &txq->q;
 472         tfd_tmp = (struct iwl_tfd *)txq->tfds;
 473         tfd = &tfd_tmp[q->write_ptr];
 474
 475         if (reset)
 476                 memset(tfd, 0, sizeof(*tfd));
 477
 478         num_tbs = iwl_tfd_get_num_tbs(tfd);
 479
 480         /* Each TFD can point to a maximum 20 Tx buffers */
 481         if (num_tbs >= IWL_NUM_OF_TBS) {
 482                 IWL_ERR(priv, "Error can not send more than %d chunks\n",
 483                           IWL_NUM_OF_TBS);
 484                 return -EINVAL;
 485         }
 486
 487         BUG_ON(addr & ~DMA_BIT_MASK(36));
 488         if (unlikely(addr & ~IWL_TX_DMA_MASK))
 489                 IWL_ERR(priv, "Unaligned address = %llx\n",
 490                           (unsigned long long)addr);
 491
 492         iwl_tfd_set_tb(tfd, num_tbs, addr, len);
 493
 494         return 0;
 495 }
 496
 497 /*
 498  * Tell nic where to find circular buffer of Tx Frame Descriptors for
 499  * given Tx queue, and enable the DMA channel used for that queue.
 500  *
 501  * 4965 supports up to 16 Tx queues in DRAM, mapped to up to 8 Tx DMA
 502  * channels supported in hardware.
 503  */
 504 int iwl_hw_tx_queue_init(struct iwl_priv *priv,
 505                          struct iwl_tx_queue *txq)
 506 {
 507         int ret;
 508         unsigned long flags;
 509         int txq_id = txq->q.id;
 510
 511         spin_lock_irqsave(&priv->lock, flags);
 512         ret = iwl_grab_nic_access(priv);
 513         if (ret) {
 514                 spin_unlock_irqrestore(&priv->lock, flags);
 515                 return ret;
 516         }
 517
 518         /* Circular buffer (TFD queue in DRAM) physical base address */
 519         iwl_write_direct32(priv, FH_MEM_CBBC_QUEUE(txq_id),
 520                              txq->q.dma_addr >> 8);
 521
 522         iwl_release_nic_access(priv);
 523         spin_unlock_irqrestore(&priv->lock, flags);
 524
 525         return 0;
 526 }
 527
 528
 529 /******************************************************************************
 530  *
 531  * Misc. internal state and helper functions
 532  *
 533  ******************************************************************************/
 534
 535 #define MAX_UCODE_BEACON_INTERVAL       4096
 536
 537 static u16 iwl_adjust_beacon_interval(u16 beacon_val)
 538 {
 539         u16 new_val = 0;
 540         u16 beacon_factor = 0;
 541
 542         beacon_factor = (beacon_val + MAX_UCODE_BEACON_INTERVAL)
 543                                         / MAX_UCODE_BEACON_INTERVAL;
 544         new_val = beacon_val / beacon_factor;
 545
 546         if (!new_val)
 547                 new_val = MAX_UCODE_BEACON_INTERVAL;
 548
 549         return new_val;
 550 }
 551
 552 static void iwl_setup_rxon_timing(struct iwl_priv *priv)
 553 {
 554         u64 tsf;
 555         s32 interval_tm, rem;
 556         unsigned long flags;
 557         struct ieee80211_conf *conf = NULL;
 558         u16 beacon_int = 0;
 559
 560         conf = ieee80211_get_hw_conf(priv->hw);
 561
 562         spin_lock_irqsave(&priv->lock, flags);
 563         priv->rxon_timing.timestamp = cpu_to_le64(priv->timestamp);
 564         priv->rxon_timing.listen_interval = cpu_to_le16(conf->listen_interval);
 565
 566         if (priv->iw_mode == NL80211_IFTYPE_STATION) {
 567                 beacon_int = iwl_adjust_beacon_interval(priv->beacon_int);
 568                 priv->rxon_timing.atim_window = 0;
 569         } else {
 570                 beacon_int = iwl_adjust_beacon_interval(conf->beacon_int);
 571
 572                 /* TODO: we need to get atim_window from upper stack
 573                  * for now we set to 0 */
 574                 priv->rxon_timing.atim_window = 0;
 575         }
 576
 577         priv->rxon_timing.beacon_interval = cpu_to_le16(beacon_int);
 578
 579         tsf = priv->timestamp; /* tsf is modifed by do_div: copy it */
 580         interval_tm = beacon_int * 1024;
 581         rem = do_div(tsf, interval_tm);
 582         priv->rxon_timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
 583
 584         spin_unlock_irqrestore(&priv->lock, flags);
 585         IWL_DEBUG_ASSOC(priv, "beacon interval %d beacon timer %d beacon tim %d\n",
 586                         le16_to_cpu(priv->rxon_timing.beacon_interval),
 587                         le32_to_cpu(priv->rxon_timing.beacon_init_val),
 588                         le16_to_cpu(priv->rxon_timing.atim_window));
 589 }
 590
 591 /******************************************************************************
 592  *
 593  * Generic RX handler implementations
 594  *
 595  ******************************************************************************/
 596 static void iwl_rx_reply_alive(struct iwl_priv *priv,
 597                                 struct iwl_rx_mem_buffer *rxb)
 598 {
 599         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
 600         struct iwl_alive_resp *palive;
 601         struct delayed_work *pwork;
 602
 603         palive = &pkt->u.alive_frame;
 604
 605         IWL_DEBUG_INFO(priv, "Alive ucode status 0x%08X revision "
 606                        "0x%01X 0x%01X\n",
 607                        palive->is_valid, palive->ver_type,
 608                        palive->ver_subtype);
 609
 610         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
 611                 IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
 612                 memcpy(&priv->card_alive_init,
 613                        &pkt->u.alive_frame,
 614                        sizeof(struct iwl_init_alive_resp));
 615                 pwork = &priv->init_alive_start;
 616         } else {
 617                 IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
 618                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
 619                        sizeof(struct iwl_alive_resp));
 620                 pwork = &priv->alive_start;
 621         }
 622
 623         /* We delay the ALIVE response by 5ms to
 624          * give the HW RF Kill time to activate... */
 625         if (palive->is_valid == UCODE_VALID_OK)
 626                 queue_delayed_work(priv->workqueue, pwork,
 627                                    msecs_to_jiffies(5));
 628         else
 629                 IWL_WARN(priv, "uCode did not respond OK.\n");
 630 }
 631
 632 static void iwl_bg_beacon_update(struct work_struct *work)
 633 {
 634         struct iwl_priv *priv =
 635                 container_of(work, struct iwl_priv, beacon_update);
 636         struct sk_buff *beacon;
 637
 638         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
 639         beacon = ieee80211_beacon_get(priv->hw, priv->vif);
 640
 641         if (!beacon) {
 642                 IWL_ERR(priv, "update beacon failed\n");
 643                 return;
 644         }
 645
 646         mutex_lock(&priv->mutex);
 647         /* new beacon skb is allocated every time; dispose previous.*/
 648         if (priv->ibss_beacon)
 649                 dev_kfree_skb(priv->ibss_beacon);
 650
 651         priv->ibss_beacon = beacon;
 652         mutex_unlock(&priv->mutex);
 653
 654         iwl_send_beacon_cmd(priv);
 655 }
 656
 657 /**
 658  * iwl_bg_statistics_periodic - Timer callback to queue statistics
 659  *
 660  * This callback is provided in order to send a statistics request.
 661  *
 662  * This timer function is continually reset to execute within
 663  * REG_RECALIB_PERIOD seconds since the last STATISTICS_NOTIFICATION
 664  * was received.  We need to ensure we receive the statistics in order
 665  * to update the temperature used for calibrating the TXPOWER.
 666  */
 667 static void iwl_bg_statistics_periodic(unsigned long data)
 668 {
 669         struct iwl_priv *priv = (struct iwl_priv *)data;
 670
 671         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 672                 return;
 673
 674         /* dont send host command if rf-kill is on */
 675         if (!iwl_is_ready_rf(priv))
 676                 return;
 677
 678         iwl_send_statistics_request(priv, CMD_ASYNC);
 679 }
 680
 681 static void iwl_rx_beacon_notif(struct iwl_priv *priv,
 682                                 struct iwl_rx_mem_buffer *rxb)
 683 {
 684 #ifdef CONFIG_IWLWIFI_DEBUG
 685         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
 686         struct iwl4965_beacon_notif *beacon =
 687                 (struct iwl4965_beacon_notif *)pkt->u.raw;
 688         u8 rate = iwl_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
 689
 690         IWL_DEBUG_RX(priv, "beacon status %x retries %d iss %d "
 691                 "tsf %d %d rate %d\n",
 692                 le32_to_cpu(beacon->beacon_notify_hdr.u.status) & TX_STATUS_MSK,
 693                 beacon->beacon_notify_hdr.failure_frame,
 694                 le32_to_cpu(beacon->ibss_mgr_status),
 695                 le32_to_cpu(beacon->high_tsf),
 696                 le32_to_cpu(beacon->low_tsf), rate);
 697 #endif
 698
 699         if ((priv->iw_mode == NL80211_IFTYPE_AP) &&
 700             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
 701                 queue_work(priv->workqueue, &priv->beacon_update);
 702 }
 703
 704 /* Handle notification from uCode that card's power state is changing
 705  * due to software, hardware, or critical temperature RFKILL */
 706 static void iwl_rx_card_state_notif(struct iwl_priv *priv,
 707                                     struct iwl_rx_mem_buffer *rxb)
 708 {
 709         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
 710         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
 711         unsigned long status = priv->status;
 712
 713         IWL_DEBUG_RF_KILL(priv, "Card state received: HW:%s SW:%s\n",
 714                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
 715                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
 716
 717         if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED |
 718                      RF_CARD_DISABLED)) {
 719
 720                 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
 721                             CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
 722
 723                 if (!iwl_grab_nic_access(priv)) {
 724                         iwl_write_direct32(
 725                                 priv, HBUS_TARG_MBX_C,
 726                                 HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
 727
 728                         iwl_release_nic_access(priv);
 729                 }
 730
 731                 if (!(flags & RXON_CARD_DISABLED)) {
 732                         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
 733                                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
 734                         if (!iwl_grab_nic_access(priv)) {
 735                                 iwl_write_direct32(
 736                                         priv, HBUS_TARG_MBX_C,
 737                                         HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
 738
 739                                 iwl_release_nic_access(priv);
 740                         }
 741                 }
 742
 743                 if (flags & RF_CARD_DISABLED) {
 744                         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
 745                                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
 746                         iwl_read32(priv, CSR_UCODE_DRV_GP1);
 747                         if (!iwl_grab_nic_access(priv))
 748                                 iwl_release_nic_access(priv);
 749                 }
 750         }
 751
 752         if (flags & HW_CARD_DISABLED)
 753                 set_bit(STATUS_RF_KILL_HW, &priv->status);
 754         else
 755                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
 756
 757
 758         if (flags & SW_CARD_DISABLED)
 759                 set_bit(STATUS_RF_KILL_SW, &priv->status);
 760         else
 761                 clear_bit(STATUS_RF_KILL_SW, &priv->status);
 762
 763         if (!(flags & RXON_CARD_DISABLED))
 764                 iwl_scan_cancel(priv);
 765
 766         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
 767              test_bit(STATUS_RF_KILL_HW, &priv->status)) ||
 768             (test_bit(STATUS_RF_KILL_SW, &status) !=
 769              test_bit(STATUS_RF_KILL_SW, &priv->status)))
 770                 queue_work(priv->workqueue, &priv->rf_kill);
 771         else
 772                 wake_up_interruptible(&priv->wait_command_queue);
 773 }
 774
 775 int iwl_set_pwr_src(struct iwl_priv *priv, enum iwl_pwr_src src)
 776 {
 777         int ret;
 778         unsigned long flags;
 779
 780         spin_lock_irqsave(&priv->lock, flags);
 781         ret = iwl_grab_nic_access(priv);
 782         if (ret)
 783                 goto err;
 784
 785         if (src == IWL_PWR_SRC_VAUX) {
 786                 if (pci_pme_capable(priv->pci_dev, PCI_D3cold))
 787                         iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
 788                                                APMG_PS_CTRL_VAL_PWR_SRC_VAUX,
 789                                                ~APMG_PS_CTRL_MSK_PWR_SRC);
 790         } else {
 791                 iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
 792                                        APMG_PS_CTRL_VAL_PWR_SRC_VMAIN,
 793                                        ~APMG_PS_CTRL_MSK_PWR_SRC);
 794         }
 795
 796         iwl_release_nic_access(priv);
 797 err:
 798         spin_unlock_irqrestore(&priv->lock, flags);
 799         return ret;
 800 }
 801
 802 /**
 803  * iwl_setup_rx_handlers - Initialize Rx handler callbacks
 804  *
 805  * Setup the RX handlers for each of the reply types sent from the uCode
 806  * to the host.
 807  *
 808  * This function chains into the hardware specific files for them to setup
 809  * any hardware specific handlers as well.
 810  */
 811 static void iwl_setup_rx_handlers(struct iwl_priv *priv)
 812 {
 813         priv->rx_handlers[REPLY_ALIVE] = iwl_rx_reply_alive;
 814         priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error;
 815         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
 816         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif;
 817         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
 818             iwl_rx_pm_debug_statistics_notif;
 819         priv->rx_handlers[BEACON_NOTIFICATION] = iwl_rx_beacon_notif;
 820
 821         /*
 822          * The same handler is used for both the REPLY to a discrete
 823          * statistics request from the host as well as for the periodic
 824          * statistics notifications (after received beacons) from the uCode.
 825          */
 826         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl_rx_statistics;
 827         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl_rx_statistics;
 828
 829         iwl_setup_spectrum_handlers(priv);
 830         iwl_setup_rx_scan_handlers(priv);
 831
 832         /* status change handler */
 833         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl_rx_card_state_notif;
 834
 835         priv->rx_handlers[MISSED_BEACONS_NOTIFICATION] =
 836             iwl_rx_missed_beacon_notif;
 837         /* Rx handlers */
 838         priv->rx_handlers[REPLY_RX_PHY_CMD] = iwl_rx_reply_rx_phy;
 839         priv->rx_handlers[REPLY_RX_MPDU_CMD] = iwl_rx_reply_rx;
 840         /* block ack */
 841         priv->rx_handlers[REPLY_COMPRESSED_BA] = iwl_rx_reply_compressed_ba;
 842         /* Set up hardware specific Rx handlers */
 843         priv->cfg->ops->lib->rx_handler_setup(priv);
 844 }
 845
 846 /**
 847  * iwl_rx_handle - Main entry function for receiving responses from uCode
 848  *
 849  * Uses the priv->rx_handlers callback function array to invoke
 850  * the appropriate handlers, including command responses,
 851  * frame-received notifications, and other notifications.
 852  */
 853 void iwl_rx_handle(struct iwl_priv *priv)
 854 {
 855         struct iwl_rx_mem_buffer *rxb;
 856         struct iwl_rx_packet *pkt;
 857         struct iwl_rx_queue *rxq = &priv->rxq;
 858         u32 r, i;
 859         int reclaim;
 860         unsigned long flags;
 861         u8 fill_rx = 0;
 862         u32 count = 8;
 863
 864         /* uCode's read index (stored in shared DRAM) indicates the last Rx
 865          * buffer that the driver may process (last buffer filled by ucode). */
 866         r = le16_to_cpu(rxq->rb_stts->closed_rb_num) &  0x0FFF;
 867         i = rxq->read;
 868
 869         /* Rx interrupt, but nothing sent from uCode */
 870         if (i == r)
 871                 IWL_DEBUG_RX(priv, "r = %d, i = %d\n", r, i);
 872
 873         if (iwl_rx_queue_space(rxq) > (RX_QUEUE_SIZE / 2))
 874                 fill_rx = 1;
 875
 876         while (i != r) {
 877                 rxb = rxq->queue[i];
 878
 879                 /* If an RXB doesn't have a Rx queue slot associated with it,
 880                  * then a bug has been introduced in the queue refilling
 881                  * routines -- catch it here */
 882                 BUG_ON(rxb == NULL);
 883
 884                 rxq->queue[i] = NULL;
 885
 886                 dma_sync_single_range_for_cpu(
 887                                 &priv->pci_dev->dev, rxb->real_dma_addr,
 888                                 rxb->aligned_dma_addr - rxb->real_dma_addr,
 889                                 priv->hw_params.rx_buf_size,
 890                                 PCI_DMA_FROMDEVICE);
 891                 pkt = (struct iwl_rx_packet *)rxb->skb->data;
 892
 893                 /* Reclaim a command buffer only if this packet is a response
 894                  *   to a (driver-originated) command.
 895                  * If the packet (e.g. Rx frame) originated from uCode,
 896                  *   there is no command buffer to reclaim.
 897                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
 898                  *   but apparently a few don't get set; catch them here. */
 899                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
 900                         (pkt->hdr.cmd != REPLY_RX_PHY_CMD) &&
 901                         (pkt->hdr.cmd != REPLY_RX) &&
 902                         (pkt->hdr.cmd != REPLY_RX_MPDU_CMD) &&
 903                         (pkt->hdr.cmd != REPLY_COMPRESSED_BA) &&
 904                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
 905                         (pkt->hdr.cmd != REPLY_TX);
 906
 907                 /* Based on type of command response or notification,
 908                  *   handle those that need handling via function in
 909                  *   rx_handlers table.  See iwl_setup_rx_handlers() */
 910                 if (priv->rx_handlers[pkt->hdr.cmd]) {
 911                         IWL_DEBUG_RX(priv, "r = %d, i = %d, %s, 0x%02x\n", r,
 912                                 i, get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
 913                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
 914                         priv->isr_stats.rx_handlers[pkt->hdr.cmd]++;
 915                 } else {
 916                         /* No handling needed */
 917                         IWL_DEBUG_RX(priv,
 918                                 "r %d i %d No handler needed for %s, 0x%02x\n",
 919                                 r, i, get_cmd_string(pkt->hdr.cmd),
 920                                 pkt->hdr.cmd);
 921                 }
 922
 923                 if (reclaim) {
 924                         /* Invoke any callbacks, transfer the skb to caller, and
 925                          * fire off the (possibly) blocking iwl_send_cmd()
 926                          * as we reclaim the driver command queue */
 927                         if (rxb && rxb->skb)
 928                                 iwl_tx_cmd_complete(priv, rxb);
 929                         else
 930                                 IWL_WARN(priv, "Claim null rxb?\n");
 931                 }
 932
 933                 /* For now we just don't re-use anything.  We can tweak this
 934                  * later to try and re-use notification packets and SKBs that
 935                  * fail to Rx correctly */
 936                 if (rxb->skb != NULL) {
 937                         priv->alloc_rxb_skb--;
 938                         dev_kfree_skb_any(rxb->skb);
 939                         rxb->skb = NULL;
 940                 }
 941
 942                 pci_unmap_single(priv->pci_dev, rxb->real_dma_addr,
 943                                  priv->hw_params.rx_buf_size + 256,
 944                                  PCI_DMA_FROMDEVICE);
 945                 spin_lock_irqsave(&rxq->lock, flags);
 946                 list_add_tail(&rxb->list, &priv->rxq.rx_used);
 947                 spin_unlock_irqrestore(&rxq->lock, flags);
 948                 i = (i + 1) & RX_QUEUE_MASK;
 949                 /* If there are a lot of unused frames,
 950                  * restock the Rx queue so ucode wont assert. */
 951                 if (fill_rx) {
 952                         count++;
 953                         if (count >= 8) {
 954                                 priv->rxq.read = i;
 955                                 iwl_rx_queue_restock(priv);
 956                                 count = 0;
 957                         }
 958                 }
 959         }
 960
 961         /* Backtrack one entry */
 962         priv->rxq.read = i;
 963         iwl_rx_queue_restock(priv);
 964 }
 965
 966 /* call this function to flush any scheduled tasklet */
 967 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
 968 {
 969         /* wait to make sure we flush pending tasklet*/
 970         synchronize_irq(priv->pci_dev->irq);
 971         tasklet_kill(&priv->irq_tasklet);
 972 }
 973
 974 static void iwl_error_recovery(struct iwl_priv *priv)
 975 {
 976         unsigned long flags;
 977
 978         memcpy(&priv->staging_rxon, &priv->recovery_rxon,
 979                sizeof(priv->staging_rxon));
 980         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
 981         iwlcore_commit_rxon(priv);
 982
 983         iwl_rxon_add_station(priv, priv->bssid, 1);
 984
 985         spin_lock_irqsave(&priv->lock, flags);
 986         priv->assoc_id = le16_to_cpu(priv->staging_rxon.assoc_id);
 987         priv->error_recovering = 0;
 988         spin_unlock_irqrestore(&priv->lock, flags);
 989 }
 990
 991 static void iwl_irq_tasklet(struct iwl_priv *priv)
 992 {
 993         u32 inta, handled = 0;
 994         u32 inta_fh;
 995         unsigned long flags;
 996 #ifdef CONFIG_IWLWIFI_DEBUG
 997         u32 inta_mask;
 998 #endif
 999
1000         spin_lock_irqsave(&priv->lock, flags);
1001
1002         /* Ack/clear/reset pending uCode interrupts.
1003          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
1004          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
1005         inta = iwl_read32(priv, CSR_INT);
1006         iwl_write32(priv, CSR_INT, inta);
1007
1008         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
1009          * Any new interrupts that happen after this, either while we're
1010          * in this tasklet, or later, will show up in next ISR/tasklet. */
1011         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1012         iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
1013
1014 #ifdef CONFIG_IWLWIFI_DEBUG
1015         if (priv->debug_level & IWL_DL_ISR) {
1016                 /* just for debug */
1017                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1018                 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1019                               inta, inta_mask, inta_fh);
1020         }
1021 #endif
1022
1023         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
1024          * atomic, make sure that inta covers all the interrupts that
1025          * we've discovered, even if FH interrupt came in just after
1026          * reading CSR_INT. */
1027         if (inta_fh & CSR49_FH_INT_RX_MASK)
1028                 inta |= CSR_INT_BIT_FH_RX;
1029         if (inta_fh & CSR49_FH_INT_TX_MASK)
1030                 inta |= CSR_INT_BIT_FH_TX;
1031
1032         /* Now service all interrupt bits discovered above. */
1033         if (inta & CSR_INT_BIT_HW_ERR) {
1034                 IWL_ERR(priv, "Microcode HW error detected.  Restarting.\n");
1035
1036                 /* Tell the device to stop sending interrupts */
1037                 iwl_disable_interrupts(priv);
1038
1039                 priv->isr_stats.hw++;
1040                 iwl_irq_handle_error(priv);
1041
1042                 handled |= CSR_INT_BIT_HW_ERR;
1043
1044                 spin_unlock_irqrestore(&priv->lock, flags);
1045
1046                 return;
1047         }
1048
1049 #ifdef CONFIG_IWLWIFI_DEBUG
1050         if (priv->debug_level & (IWL_DL_ISR)) {
1051                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1052                 if (inta & CSR_INT_BIT_SCD) {
1053                         IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
1054                                       "the frame/frames.\n");
1055                         priv->isr_stats.sch++;
1056                 }
1057
1058                 /* Alive notification via Rx interrupt will do the real work */
1059                 if (inta & CSR_INT_BIT_ALIVE) {
1060                         IWL_DEBUG_ISR(priv, "Alive interrupt\n");
1061                         priv->isr_stats.alive++;
1062                 }
1063         }
1064 #endif
1065         /* Safely ignore these bits for debug checks below */
1066         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1067
1068         /* HW RF KILL switch toggled */
1069         if (inta & CSR_INT_BIT_RF_KILL) {
1070                 int hw_rf_kill = 0;
1071                 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
1072                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
1073                         hw_rf_kill = 1;
1074
1075                 IWL_DEBUG_RF_KILL(priv, "RF_KILL bit toggled to %s.\n",
1076                                 hw_rf_kill ? "disable radio" : "enable radio");
1077
1078                 priv->isr_stats.rfkill++;
1079
1080                 /* driver only loads ucode once setting the interface up.
1081                  * the driver allows loading the ucode even if the radio
1082                  * is killed. Hence update the killswitch state here. The
1083                  * rfkill handler will care about restarting if needed.
1084                  */
1085                 if (!test_bit(STATUS_ALIVE, &priv->status)) {
1086                         if (hw_rf_kill)
1087                                 set_bit(STATUS_RF_KILL_HW, &priv->status);
1088                         else
1089                                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
1090                         queue_work(priv->workqueue, &priv->rf_kill);
1091                 }
1092
1093                 handled |= CSR_INT_BIT_RF_KILL;
1094         }
1095
1096         /* Chip got too hot and stopped itself */
1097         if (inta & CSR_INT_BIT_CT_KILL) {
1098                 IWL_ERR(priv, "Microcode CT kill error detected.\n");
1099                 priv->isr_stats.ctkill++;
1100                 handled |= CSR_INT_BIT_CT_KILL;
1101         }
1102
1103         /* Error detected by uCode */
1104         if (inta & CSR_INT_BIT_SW_ERR) {
1105                 IWL_ERR(priv, "Microcode SW error detected. "
1106                         " Restarting 0x%X.\n", inta);
1107                 priv->isr_stats.sw++;
1108                 priv->isr_stats.sw_err = inta;
1109                 iwl_irq_handle_error(priv);
1110                 handled |= CSR_INT_BIT_SW_ERR;
1111         }
1112
1113         /* uCode wakes up after power-down sleep */
1114         if (inta & CSR_INT_BIT_WAKEUP) {
1115                 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
1116                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
1117                 iwl_txq_update_write_ptr(priv, &priv->txq[0]);
1118                 iwl_txq_update_write_ptr(priv, &priv->txq[1]);
1119                 iwl_txq_update_write_ptr(priv, &priv->txq[2]);
1120                 iwl_txq_update_write_ptr(priv, &priv->txq[3]);
1121                 iwl_txq_update_write_ptr(priv, &priv->txq[4]);
1122                 iwl_txq_update_write_ptr(priv, &priv->txq[5]);
1123
1124                 priv->isr_stats.wakeup++;
1125
1126                 handled |= CSR_INT_BIT_WAKEUP;
1127         }
1128
1129         /* All uCode command responses, including Tx command responses,
1130          * Rx "responses" (frame-received notification), and other
1131          * notifications from uCode come through here*/
1132         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1133                 iwl_rx_handle(priv);
1134                 priv->isr_stats.rx++;
1135                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1136         }
1137
1138         if (inta & CSR_INT_BIT_FH_TX) {
1139                 IWL_DEBUG_ISR(priv, "Tx interrupt\n");
1140                 priv->isr_stats.tx++;
1141                 handled |= CSR_INT_BIT_FH_TX;
1142                 /* FH finished to write, send event */
1143                 priv->ucode_write_complete = 1;
1144                 wake_up_interruptible(&priv->wait_command_queue);
1145         }
1146
1147         if (inta & ~handled) {
1148                 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
1149                 priv->isr_stats.unhandled++;
1150         }
1151
1152         if (inta & ~CSR_INI_SET_MASK) {
1153                 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
1154                          inta & ~CSR_INI_SET_MASK);
1155                 IWL_WARN(priv, "   with FH_INT = 0x%08x\n", inta_fh);
1156         }
1157
1158         /* Re-enable all interrupts */
1159         /* only Re-enable if diabled by irq */
1160         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1161                 iwl_enable_interrupts(priv);
1162
1163 #ifdef CONFIG_IWLWIFI_DEBUG
1164         if (priv->debug_level & (IWL_DL_ISR)) {
1165                 inta = iwl_read32(priv, CSR_INT);
1166                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1167                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1168                 IWL_DEBUG_ISR(priv, "End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
1169                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
1170         }
1171 #endif
1172         spin_unlock_irqrestore(&priv->lock, flags);
1173 }
1174
1175
1176 /******************************************************************************
1177  *
1178  * uCode download functions
1179  *
1180  ******************************************************************************/
1181
1182 static void iwl_dealloc_ucode_pci(struct iwl_priv *priv)
1183 {
1184         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
1185         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
1186         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1187         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
1188         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1189         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
1190 }
1191
1192 static void iwl_nic_start(struct iwl_priv *priv)
1193 {
1194         /* Remove all resets to allow NIC to operate */
1195         iwl_write32(priv, CSR_RESET, 0);
1196 }
1197
1198
1199 /**
1200  * iwl_read_ucode - Read uCode images from disk file.
1201  *
1202  * Copy into buffers for card to fetch via bus-mastering
1203  */
1204 static int iwl_read_ucode(struct iwl_priv *priv)
1205 {
1206         struct iwl_ucode *ucode;
1207         int ret = -EINVAL, index;
1208         const struct firmware *ucode_raw;
1209         const char *name_pre = priv->cfg->fw_name_pre;
1210         const unsigned int api_max = priv->cfg->ucode_api_max;
1211         const unsigned int api_min = priv->cfg->ucode_api_min;
1212         char buf[25];
1213         u8 *src;
1214         size_t len;
1215         u32 api_ver, inst_size, data_size, init_size, init_data_size, boot_size;
1216
1217         /* Ask kernel firmware_class module to get the boot firmware off disk.
1218          * request_firmware() is synchronous, file is in memory on return. */
1219         for (index = api_max; index >= api_min; index--) {
1220                 sprintf(buf, "%s%d%s", name_pre, index, ".ucode");
1221                 ret = request_firmware(&ucode_raw, buf, &priv->pci_dev->dev);
1222                 if (ret < 0) {
1223                         IWL_ERR(priv, "%s firmware file req failed: %d\n",
1224                                   buf, ret);
1225                         if (ret == -ENOENT)
1226                                 continue;
1227                         else
1228                                 goto error;
1229                 } else {
1230                         if (index < api_max)
1231                                 IWL_ERR(priv, "Loaded firmware %s, "
1232                                         "which is deprecated. "
1233                                         "Please use API v%u instead.\n",
1234                                           buf, api_max);
1235
1236                         IWL_DEBUG_INFO(priv, "Got firmware '%s' file (%zd bytes) from disk\n",
1237                                        buf, ucode_raw->size);
1238                         break;
1239                 }
1240         }
1241
1242         if (ret < 0)
1243                 goto error;
1244
1245         /* Make sure that we got at least our header! */
1246         if (ucode_raw->size < sizeof(*ucode)) {
1247                 IWL_ERR(priv, "File size way too small!\n");
1248                 ret = -EINVAL;
1249                 goto err_release;
1250         }
1251
1252         /* Data from ucode file:  header followed by uCode images */
1253         ucode = (void *)ucode_raw->data;
1254
1255         priv->ucode_ver = le32_to_cpu(ucode->ver);
1256         api_ver = IWL_UCODE_API(priv->ucode_ver);
1257         inst_size = le32_to_cpu(ucode->inst_size);
1258         data_size = le32_to_cpu(ucode->data_size);
1259         init_size = le32_to_cpu(ucode->init_size);
1260         init_data_size = le32_to_cpu(ucode->init_data_size);
1261         boot_size = le32_to_cpu(ucode->boot_size);
1262
1263         /* api_ver should match the api version forming part of the
1264          * firmware filename ... but we don't check for that and only rely
1265          * on the API version read from firmware header from here on forward */
1266
1267         if (api_ver < api_min || api_ver > api_max) {
1268                 IWL_ERR(priv, "Driver unable to support your firmware API. "
1269                           "Driver supports v%u, firmware is v%u.\n",
1270                           api_max, api_ver);
1271                 priv->ucode_ver = 0;
1272                 ret = -EINVAL;
1273                 goto err_release;
1274         }
1275         if (api_ver != api_max)
1276                 IWL_ERR(priv, "Firmware has old API version. Expected v%u, "
1277                           "got v%u. New firmware can be obtained "
1278                           "from http://www.intellinuxwireless.org.\n",
1279                           api_max, api_ver);
1280
1281         IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u\n",
1282                IWL_UCODE_MAJOR(priv->ucode_ver),
1283                IWL_UCODE_MINOR(priv->ucode_ver),
1284                IWL_UCODE_API(priv->ucode_ver),
1285                IWL_UCODE_SERIAL(priv->ucode_ver));
1286
1287         IWL_DEBUG_INFO(priv, "f/w package hdr ucode version raw = 0x%x\n",
1288                        priv->ucode_ver);
1289         IWL_DEBUG_INFO(priv, "f/w package hdr runtime inst size = %u\n",
1290                        inst_size);
1291         IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %u\n",
1292                        data_size);
1293         IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %u\n",
1294                        init_size);
1295         IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %u\n",
1296                        init_data_size);
1297         IWL_DEBUG_INFO(priv, "f/w package hdr boot inst size = %u\n",
1298                        boot_size);
1299
1300         /* Verify size of file vs. image size info in file's header */
1301         if (ucode_raw->size < sizeof(*ucode) +
1302                 inst_size + data_size + init_size +
1303                 init_data_size + boot_size) {
1304
1305                 IWL_DEBUG_INFO(priv, "uCode file size %d too small\n",
1306                                (int)ucode_raw->size);
1307                 ret = -EINVAL;
1308                 goto err_release;
1309         }
1310
1311         /* Verify that uCode images will fit in card's SRAM */
1312         if (inst_size > priv->hw_params.max_inst_size) {
1313                 IWL_DEBUG_INFO(priv, "uCode instr len %d too large to fit in\n",
1314                                inst_size);
1315                 ret = -EINVAL;
1316                 goto err_release;
1317         }
1318
1319         if (data_size > priv->hw_params.max_data_size) {
1320                 IWL_DEBUG_INFO(priv, "uCode data len %d too large to fit in\n",
1321                                 data_size);
1322                 ret = -EINVAL;
1323                 goto err_release;
1324         }
1325         if (init_size > priv->hw_params.max_inst_size) {
1326                 IWL_INFO(priv, "uCode init instr len %d too large to fit in\n",
1327                         init_size);
1328                 ret = -EINVAL;
1329                 goto err_release;
1330         }
1331         if (init_data_size > priv->hw_params.max_data_size) {
1332                 IWL_INFO(priv, "uCode init data len %d too large to fit in\n",
1333                       init_data_size);
1334                 ret = -EINVAL;
1335                 goto err_release;
1336         }
1337         if (boot_size > priv->hw_params.max_bsm_size) {
1338                 IWL_INFO(priv, "uCode boot instr len %d too large to fit in\n",
1339                         boot_size);
1340                 ret = -EINVAL;
1341                 goto err_release;
1342         }
1343
1344         /* Allocate ucode buffers for card's bus-master loading ... */
1345
1346         /* Runtime instructions and 2 copies of data:
1347          * 1) unmodified from disk
1348          * 2) backup cache for save/restore during power-downs */
1349         priv->ucode_code.len = inst_size;
1350         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
1351
1352         priv->ucode_data.len = data_size;
1353         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
1354
1355         priv->ucode_data_backup.len = data_size;
1356         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1357
1358         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
1359             !priv->ucode_data_backup.v_addr)
1360                 goto err_pci_alloc;
1361
1362         /* Initialization instructions and data */
1363         if (init_size && init_data_size) {
1364                 priv->ucode_init.len = init_size;
1365                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
1366
1367                 priv->ucode_init_data.len = init_data_size;
1368                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1369
1370                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
1371                         goto err_pci_alloc;
1372         }
1373
1374         /* Bootstrap (instructions only, no data) */
1375         if (boot_size) {
1376                 priv->ucode_boot.len = boot_size;
1377                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
1378
1379                 if (!priv->ucode_boot.v_addr)
1380                         goto err_pci_alloc;
1381         }
1382
1383         /* Copy images into buffers for card's bus-master reads ... */
1384
1385         /* Runtime instructions (first block of data in file) */
1386         src = &ucode->data[0];
1387         len = priv->ucode_code.len;
1388         IWL_DEBUG_INFO(priv, "Copying (but not loading) uCode instr len %Zd\n", len);
1389         memcpy(priv->ucode_code.v_addr, src, len);
1390         IWL_DEBUG_INFO(priv, "uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
1391                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
1392
1393         /* Runtime data (2nd block)
1394          * NOTE:  Copy into backup buffer will be done in iwl_up()  */
1395         src = &ucode->data[inst_size];
1396         len = priv->ucode_data.len;
1397         IWL_DEBUG_INFO(priv, "Copying (but not loading) uCode data len %Zd\n", len);
1398         memcpy(priv->ucode_data.v_addr, src, len);
1399         memcpy(priv->ucode_data_backup.v_addr, src, len);
1400
1401         /* Initialization instructions (3rd block) */
1402         if (init_size) {
1403                 src = &ucode->data[inst_size + data_size];
1404                 len = priv->ucode_init.len;
1405                 IWL_DEBUG_INFO(priv, "Copying (but not loading) init instr len %Zd\n",
1406                                 len);
1407                 memcpy(priv->ucode_init.v_addr, src, len);
1408         }
1409
1410         /* Initialization data (4th block) */
1411         if (init_data_size) {
1412                 src = &ucode->data[inst_size + data_size + init_size];
1413                 len = priv->ucode_init_data.len;
1414                 IWL_DEBUG_INFO(priv, "Copying (but not loading) init data len %Zd\n",
1415                                len);
1416                 memcpy(priv->ucode_init_data.v_addr, src, len);
1417         }
1418
1419         /* Bootstrap instructions (5th block) */
1420         src = &ucode->data[inst_size + data_size + init_size + init_data_size];
1421         len = priv->ucode_boot.len;
1422         IWL_DEBUG_INFO(priv, "Copying (but not loading) boot instr len %Zd\n", len);
1423         memcpy(priv->ucode_boot.v_addr, src, len);
1424
1425         /* We have our copies now, allow OS release its copies */
1426         release_firmware(ucode_raw);
1427         return 0;
1428
1429  err_pci_alloc:
1430         IWL_ERR(priv, "failed to allocate pci memory\n");
1431         ret = -ENOMEM;
1432         iwl_dealloc_ucode_pci(priv);
1433
1434  err_release:
1435         release_firmware(ucode_raw);
1436
1437  error:
1438         return ret;
1439 }
1440
1441 /**
1442  * iwl_alive_start - called after REPLY_ALIVE notification received
1443  *                   from protocol/runtime uCode (initialization uCode's
1444  *                   Alive gets handled by iwl_init_alive_start()).
1445  */
1446 static void iwl_alive_start(struct iwl_priv *priv)
1447 {
1448         int ret = 0;
1449
1450         IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
1451
1452         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
1453                 /* We had an error bringing up the hardware, so take it
1454                  * all the way back down so we can try again */
1455                 IWL_DEBUG_INFO(priv, "Alive failed.\n");
1456                 goto restart;
1457         }
1458
1459         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
1460          * This is a paranoid check, because we would not have gotten the
1461          * "runtime" alive if code weren't properly loaded.  */
1462         if (iwl_verify_ucode(priv)) {
1463                 /* Runtime instruction load was bad;
1464                  * take it all the way back down so we can try again */
1465                 IWL_DEBUG_INFO(priv, "Bad runtime uCode load.\n");
1466                 goto restart;
1467         }
1468
1469         priv->cfg->ops->smgmt->clear_station_table(priv);
1470         ret = priv->cfg->ops->lib->alive_notify(priv);
1471         if (ret) {
1472                 IWL_WARN(priv,
1473                         "Could not complete ALIVE transition [ntf]: %d\n", ret);
1474                 goto restart;
1475         }
1476
1477         /* After the ALIVE response, we can send host commands to the uCode */
1478         set_bit(STATUS_ALIVE, &priv->status);
1479
1480         if (iwl_is_rfkill(priv))
1481                 return;
1482
1483         ieee80211_wake_queues(priv->hw);
1484
1485         priv->active_rate = priv->rates_mask;
1486         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
1487
1488         if (iwl_is_associated(priv)) {
1489                 struct iwl_rxon_cmd *active_rxon =
1490                                 (struct iwl_rxon_cmd *)&priv->active_rxon;
1491                 /* apply any changes in staging */
1492                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
1493                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1494         } else {
1495                 /* Initialize our rx_config data */
1496                 iwl_connection_init_rx_config(priv, priv->iw_mode);
1497
1498                 if (priv->cfg->ops->hcmd->set_rxon_chain)
1499                         priv->cfg->ops->hcmd->set_rxon_chain(priv);
1500
1501                 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
1502         }
1503
1504         /* Configure Bluetooth device coexistence support */
1505         iwl_send_bt_config(priv);
1506
1507         iwl_reset_run_time_calib(priv);
1508
1509         /* Configure the adapter for unassociated operation */
1510         iwlcore_commit_rxon(priv);
1511
1512         /* At this point, the NIC is initialized and operational */
1513         iwl_rf_kill_ct_config(priv);
1514
1515         iwl_leds_register(priv);
1516
1517         IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
1518         set_bit(STATUS_READY, &priv->status);
1519         wake_up_interruptible(&priv->wait_command_queue);
1520
1521         if (priv->error_recovering)
1522                 iwl_error_recovery(priv);
1523
1524         iwl_power_update_mode(priv, 1);
1525
1526         /* reassociate for ADHOC mode */
1527         if (priv->vif && (priv->iw_mode == NL80211_IFTYPE_ADHOC)) {
1528                 struct sk_buff *beacon = ieee80211_beacon_get(priv->hw,
1529                                                                 priv->vif);
1530                 if (beacon)
1531                         iwl_mac_beacon_update(priv->hw, beacon);
1532         }
1533
1534
1535         if (test_and_clear_bit(STATUS_MODE_PENDING, &priv->status))
1536                 iwl_set_mode(priv, priv->iw_mode);
1537
1538         return;
1539
1540  restart:
1541         queue_work(priv->workqueue, &priv->restart);
1542 }
1543
1544 static void iwl_cancel_deferred_work(struct iwl_priv *priv);
1545
1546 static void __iwl_down(struct iwl_priv *priv)
1547 {
1548         unsigned long flags;
1549         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
1550
1551         IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
1552
1553         if (!exit_pending)
1554                 set_bit(STATUS_EXIT_PENDING, &priv->status);
1555
1556         iwl_leds_unregister(priv);
1557
1558         priv->cfg->ops->smgmt->clear_station_table(priv);
1559
1560         /* Unblock any waiting calls */
1561         wake_up_interruptible_all(&priv->wait_command_queue);
1562
1563         /* Wipe out the EXIT_PENDING status bit if we are not actually
1564          * exiting the module */
1565         if (!exit_pending)
1566                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
1567
1568         /* stop and reset the on-board processor */
1569         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
1570
1571         /* tell the device to stop sending interrupts */
1572         spin_lock_irqsave(&priv->lock, flags);
1573         iwl_disable_interrupts(priv);
1574         spin_unlock_irqrestore(&priv->lock, flags);
1575         iwl_synchronize_irq(priv);
1576
1577         if (priv->mac80211_registered)
1578                 ieee80211_stop_queues(priv->hw);
1579
1580         /* If we have not previously called iwl_init() then
1581          * clear all bits but the RF Kill bits and return */
1582         if (!iwl_is_init(priv)) {
1583                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
1584                                         STATUS_RF_KILL_HW |
1585                                test_bit(STATUS_RF_KILL_SW, &priv->status) <<
1586                                         STATUS_RF_KILL_SW |
1587                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
1588                                         STATUS_GEO_CONFIGURED |
1589                                test_bit(STATUS_EXIT_PENDING, &priv->status) <<
1590                                         STATUS_EXIT_PENDING;
1591                 goto exit;
1592         }
1593
1594         /* ...otherwise clear out all the status bits but the RF Kill
1595          * bits and continue taking the NIC down. */
1596         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
1597                                 STATUS_RF_KILL_HW |
1598                         test_bit(STATUS_RF_KILL_SW, &priv->status) <<
1599                                 STATUS_RF_KILL_SW |
1600                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
1601                                 STATUS_GEO_CONFIGURED |
1602                         test_bit(STATUS_FW_ERROR, &priv->status) <<
1603                                 STATUS_FW_ERROR |
1604                        test_bit(STATUS_EXIT_PENDING, &priv->status) <<
1605                                 STATUS_EXIT_PENDING;
1606
1607         spin_lock_irqsave(&priv->lock, flags);
1608         iwl_clear_bit(priv, CSR_GP_CNTRL,
1609                          CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
1610         spin_unlock_irqrestore(&priv->lock, flags);
1611
1612         iwl_txq_ctx_stop(priv);
1613         iwl_rxq_stop(priv);
1614
1615         spin_lock_irqsave(&priv->lock, flags);
1616         if (!iwl_grab_nic_access(priv)) {
1617                 iwl_write_prph(priv, APMG_CLK_DIS_REG,
1618                                          APMG_CLK_VAL_DMA_CLK_RQT);
1619                 iwl_release_nic_access(priv);
1620         }
1621         spin_unlock_irqrestore(&priv->lock, flags);
1622
1623         udelay(5);
1624
1625         /* FIXME: apm_ops.suspend(priv) */
1626         if (exit_pending)
1627                 priv->cfg->ops->lib->apm_ops.stop(priv);
1628         else
1629                 priv->cfg->ops->lib->apm_ops.reset(priv);
1630  exit:
1631         memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
1632
1633         if (priv->ibss_beacon)
1634                 dev_kfree_skb(priv->ibss_beacon);
1635         priv->ibss_beacon = NULL;
1636
1637         /* clear out any free frames */
1638         iwl_clear_free_frames(priv);
1639 }
1640
1641 static void iwl_down(struct iwl_priv *priv)
1642 {
1643         mutex_lock(&priv->mutex);
1644         __iwl_down(priv);
1645         mutex_unlock(&priv->mutex);
1646
1647         iwl_cancel_deferred_work(priv);
1648 }
1649
1650 #define MAX_HW_RESTARTS 5
1651
1652 static int __iwl_up(struct iwl_priv *priv)
1653 {
1654         int i;
1655         int ret;
1656
1657         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1658                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
1659                 return -EIO;
1660         }
1661
1662         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
1663                 IWL_ERR(priv, "ucode not available for device bringup\n");
1664                 return -EIO;
1665         }
1666
1667         /* If platform's RF_KILL switch is NOT set to KILL */
1668         if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
1669                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
1670         else
1671                 set_bit(STATUS_RF_KILL_HW, &priv->status);
1672
1673         if (iwl_is_rfkill(priv)) {
1674                 iwl_enable_interrupts(priv);
1675                 IWL_WARN(priv, "Radio disabled by %s RF Kill switch\n",
1676                     test_bit(STATUS_RF_KILL_HW, &priv->status) ? "HW" : "SW");
1677                 return 0;
1678         }
1679
1680         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
1681
1682         ret = iwl_hw_nic_init(priv);
1683         if (ret) {
1684                 IWL_ERR(priv, "Unable to init nic\n");
1685                 return ret;
1686         }
1687
1688         /* make sure rfkill handshake bits are cleared */
1689         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
1690         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
1691                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
1692
1693         /* clear (again), then enable host interrupts */
1694         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
1695         iwl_enable_interrupts(priv);
1696
1697         /* really make sure rfkill handshake bits are cleared */
1698         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
1699         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
1700
1701         /* Copy original ucode data image from disk into backup cache.
1702          * This will be used to initialize the on-board processor's
1703          * data SRAM for a clean start when the runtime program first loads. */
1704         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
1705                priv->ucode_data.len);
1706
1707         for (i = 0; i < MAX_HW_RESTARTS; i++) {
1708
1709                 priv->cfg->ops->smgmt->clear_station_table(priv);
1710
1711                 /* load bootstrap state machine,
1712                  * load bootstrap program into processor's memory,
1713                  * prepare to load the "initialize" uCode */
1714                 ret = priv->cfg->ops->lib->load_ucode(priv);
1715
1716                 if (ret) {
1717                         IWL_ERR(priv, "Unable to set up bootstrap uCode: %d\n",
1718                                 ret);
1719                         continue;
1720                 }
1721
1722                 /* Clear out the uCode error bit if it is set */
1723                 clear_bit(STATUS_FW_ERROR, &priv->status);
1724
1725                 /* start card; "initialize" will load runtime ucode */
1726                 iwl_nic_start(priv);
1727
1728                 IWL_DEBUG_INFO(priv, DRV_NAME " is coming up\n");
1729
1730                 return 0;
1731         }
1732
1733         set_bit(STATUS_EXIT_PENDING, &priv->status);
1734         __iwl_down(priv);
1735         clear_bit(STATUS_EXIT_PENDING, &priv->status);
1736
1737         /* tried to restart and config the device for as long as our
1738          * patience could withstand */
1739         IWL_ERR(priv, "Unable to initialize device after %d attempts.\n", i);
1740         return -EIO;
1741 }
1742
1743
1744 /*****************************************************************************
1745  *
1746  * Workqueue callbacks
1747  *
1748  *****************************************************************************/
1749
1750 static void iwl_bg_init_alive_start(struct work_struct *data)
1751 {
1752         struct iwl_priv *priv =
1753             container_of(data, struct iwl_priv, init_alive_start.work);
1754
1755         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1756                 return;
1757
1758         mutex_lock(&priv->mutex);
1759         priv->cfg->ops->lib->init_alive_start(priv);
1760         mutex_unlock(&priv->mutex);
1761 }
1762
1763 static void iwl_bg_alive_start(struct work_struct *data)
1764 {
1765         struct iwl_priv *priv =
1766             container_of(data, struct iwl_priv, alive_start.work);
1767
1768         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1769                 return;
1770
1771         mutex_lock(&priv->mutex);
1772         iwl_alive_start(priv);
1773         mutex_unlock(&priv->mutex);
1774 }
1775
1776 static void iwl_bg_run_time_calib_work(struct work_struct *work)
1777 {
1778         struct iwl_priv *priv = container_of(work, struct iwl_priv,
1779                         run_time_calib_work);
1780
1781         mutex_lock(&priv->mutex);
1782
1783         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
1784             test_bit(STATUS_SCANNING, &priv->status)) {
1785                 mutex_unlock(&priv->mutex);
1786                 return;
1787         }
1788
1789         if (priv->start_calib) {
1790                 iwl_chain_noise_calibration(priv, &priv->statistics);
1791
1792                 iwl_sensitivity_calibration(priv, &priv->statistics);
1793         }
1794
1795         mutex_unlock(&priv->mutex);
1796         return;
1797 }
1798
1799 static void iwl_bg_up(struct work_struct *data)
1800 {
1801         struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
1802
1803         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1804                 return;
1805
1806         mutex_lock(&priv->mutex);
1807         __iwl_up(priv);
1808         mutex_unlock(&priv->mutex);
1809         iwl_rfkill_set_hw_state(priv);
1810 }
1811
1812 static void iwl_bg_restart(struct work_struct *data)
1813 {
1814         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
1815
1816         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1817                 return;
1818
1819         iwl_down(priv);
1820         queue_work(priv->workqueue, &priv->up);
1821 }
1822
1823 static void iwl_bg_rx_replenish(struct work_struct *data)
1824 {
1825         struct iwl_priv *priv =
1826             container_of(data, struct iwl_priv, rx_replenish);
1827
1828         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1829                 return;
1830
1831         mutex_lock(&priv->mutex);
1832         iwl_rx_replenish(priv);
1833         mutex_unlock(&priv->mutex);
1834 }
1835
1836 #define IWL_DELAY_NEXT_SCAN (HZ*2)
1837
1838 void iwl_post_associate(struct iwl_priv *priv)
1839 {
1840         struct ieee80211_conf *conf = NULL;
1841         int ret = 0;
1842         unsigned long flags;
1843
1844         if (priv->iw_mode == NL80211_IFTYPE_AP) {
1845                 IWL_ERR(priv, "%s Should not be called in AP mode\n", __func__);
1846                 return;
1847         }
1848
1849         IWL_DEBUG_ASSOC(priv, "Associated as %d to: %pM\n",
1850                         priv->assoc_id, priv->active_rxon.bssid_addr);
1851
1852
1853         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1854                 return;
1855
1856
1857         if (!priv->vif || !priv->is_open)
1858                 return;
1859
1860         iwl_power_cancel_timeout(priv);
1861         iwl_scan_cancel_timeout(priv, 200);
1862
1863         conf = ieee80211_get_hw_conf(priv->hw);
1864
1865         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1866         iwlcore_commit_rxon(priv);
1867
1868         iwl_setup_rxon_timing(priv);
1869         ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
1870                               sizeof(priv->rxon_timing), &priv->rxon_timing);
1871         if (ret)
1872                 IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
1873                             "Attempting to continue.\n");
1874
1875         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
1876
1877         iwl_set_rxon_ht(priv, &priv->current_ht_config);
1878
1879         if (priv->cfg->ops->hcmd->set_rxon_chain)
1880                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
1881
1882         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
1883
1884         IWL_DEBUG_ASSOC(priv, "assoc id %d beacon interval %d\n",
1885                         priv->assoc_id, priv->beacon_int);
1886
1887         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
1888                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
1889         else
1890                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
1891
1892         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
1893                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
1894                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
1895                 else
1896                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
1897
1898                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
1899                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
1900
1901         }
1902
1903         iwlcore_commit_rxon(priv);
1904
1905         switch (priv->iw_mode) {
1906         case NL80211_IFTYPE_STATION:
1907                 break;
1908
1909         case NL80211_IFTYPE_ADHOC:
1910
1911                 /* assume default assoc id */
1912                 priv->assoc_id = 1;
1913
1914                 iwl_rxon_add_station(priv, priv->bssid, 0);
1915                 iwl_send_beacon_cmd(priv);
1916
1917                 break;
1918
1919         default:
1920                 IWL_ERR(priv, "%s Should not be called in %d mode\n",
1921                           __func__, priv->iw_mode);
1922                 break;
1923         }
1924
1925         if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
1926                 priv->assoc_station_added = 1;
1927
1928         spin_lock_irqsave(&priv->lock, flags);
1929         iwl_activate_qos(priv, 0);
1930         spin_unlock_irqrestore(&priv->lock, flags);
1931
1932         /* the chain noise calibration will enabled PM upon completion
1933          * If chain noise has already been run, then we need to enable
1934          * power management here */
1935         if (priv->chain_noise_data.state == IWL_CHAIN_NOISE_DONE)
1936                 iwl_power_enable_management(priv);
1937
1938         /* Enable Rx differential gain and sensitivity calibrations */
1939         iwl_chain_noise_reset(priv);
1940         priv->start_calib = 1;
1941
1942 }
1943
1944 /*****************************************************************************
1945  *
1946  * mac80211 entry point functions
1947  *
1948  *****************************************************************************/
1949
1950 #define UCODE_READY_TIMEOUT     (4 * HZ)
1951
1952 static int iwl_mac_start(struct ieee80211_hw *hw)
1953 {
1954         struct iwl_priv *priv = hw->priv;
1955         int ret;
1956
1957         IWL_DEBUG_MAC80211(priv, "enter\n");
1958
1959         /* we should be verifying the device is ready to be opened */
1960         mutex_lock(&priv->mutex);
1961
1962         memset(&priv->staging_rxon, 0, sizeof(struct iwl_rxon_cmd));
1963         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
1964          * ucode filename and max sizes are card-specific. */
1965
1966         if (!priv->ucode_code.len) {
1967                 ret = iwl_read_ucode(priv);
1968                 if (ret) {
1969                         IWL_ERR(priv, "Could not read microcode: %d\n", ret);
1970                         mutex_unlock(&priv->mutex);
1971                         return ret;
1972                 }
1973         }
1974
1975         ret = __iwl_up(priv);
1976
1977         mutex_unlock(&priv->mutex);
1978
1979         iwl_rfkill_set_hw_state(priv);
1980
1981         if (ret)
1982                 return ret;
1983
1984         if (iwl_is_rfkill(priv))
1985                 goto out;
1986
1987         IWL_DEBUG_INFO(priv, "Start UP work done.\n");
1988
1989         /* Wait for START_ALIVE from Run Time ucode. Otherwise callbacks from
1990          * mac80211 will not be run successfully. */
1991         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
1992                         test_bit(STATUS_READY, &priv->status),
1993                         UCODE_READY_TIMEOUT);
1994         if (!ret) {
1995                 if (!test_bit(STATUS_READY, &priv->status)) {
1996                         IWL_ERR(priv, "START_ALIVE timeout after %dms.\n",
1997                                 jiffies_to_msecs(UCODE_READY_TIMEOUT));
1998                         return -ETIMEDOUT;
1999                 }
2000         }
2001
2002 out:
2003         priv->is_open = 1;
2004         /* default to MONITOR mode */
2005         priv->iw_mode = NL80211_IFTYPE_MONITOR;
2006         IWL_DEBUG_MAC80211(priv, "leave\n");
2007         return 0;
2008 }
2009
2010 static void iwl_mac_stop(struct ieee80211_hw *hw)
2011 {
2012         struct iwl_priv *priv = hw->priv;
2013
2014         IWL_DEBUG_MAC80211(priv, "enter\n");
2015
2016         if (!priv->is_open) {
2017                 IWL_DEBUG_MAC80211(priv, "leave - skip\n");
2018                 return;
2019         }
2020
2021         priv->is_open = 0;
2022
2023         if (iwl_is_ready_rf(priv)) {
2024                 /* stop mac, cancel any scan request and clear
2025                  * RXON_FILTER_ASSOC_MSK BIT
2026                  */
2027                 mutex_lock(&priv->mutex);
2028                 iwl_scan_cancel_timeout(priv, 100);
2029                 mutex_unlock(&priv->mutex);
2030         }
2031
2032         iwl_down(priv);
2033
2034         flush_workqueue(priv->workqueue);
2035
2036         /* enable interrupts again in order to receive rfkill changes */
2037         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2038         iwl_enable_interrupts(priv);
2039
2040         IWL_DEBUG_MAC80211(priv, "leave\n");
2041 }
2042
2043 static int iwl_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
2044 {
2045         struct iwl_priv *priv = hw->priv;
2046
2047         IWL_DEBUG_MACDUMP(priv, "enter\n");
2048
2049         IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
2050                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
2051
2052         if (iwl_tx_skb(priv, skb))
2053                 dev_kfree_skb_any(skb);
2054
2055         IWL_DEBUG_MACDUMP(priv, "leave\n");
2056         return NETDEV_TX_OK;
2057 }
2058
2059 void iwl_config_ap(struct iwl_priv *priv)
2060 {
2061         int ret = 0;
2062         unsigned long flags;
2063
2064         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2065                 return;
2066
2067         /* The following should be done only at AP bring up */
2068         if (!iwl_is_associated(priv)) {
2069
2070                 /* RXON - unassoc (to set timing command) */
2071                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2072                 iwlcore_commit_rxon(priv);
2073
2074                 /* RXON Timing */
2075                 iwl_setup_rxon_timing(priv);
2076                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
2077                                 sizeof(priv->rxon_timing), &priv->rxon_timing);
2078                 if (ret)
2079                         IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
2080                                         "Attempting to continue.\n");
2081
2082                 if (priv->cfg->ops->hcmd->set_rxon_chain)
2083                         priv->cfg->ops->hcmd->set_rxon_chain(priv);
2084
2085                 /* FIXME: what should be the assoc_id for AP? */
2086                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
2087                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
2088                         priv->staging_rxon.flags |=
2089                                 RXON_FLG_SHORT_PREAMBLE_MSK;
2090                 else
2091                         priv->staging_rxon.flags &=
2092                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
2093
2094                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
2095                         if (priv->assoc_capability &
2096                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
2097                                 priv->staging_rxon.flags |=
2098                                         RXON_FLG_SHORT_SLOT_MSK;
2099                         else
2100                                 priv->staging_rxon.flags &=
2101                                         ~RXON_FLG_SHORT_SLOT_MSK;
2102
2103                         if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
2104                                 priv->staging_rxon.flags &=
2105                                         ~RXON_FLG_SHORT_SLOT_MSK;
2106                 }
2107                 /* restore RXON assoc */
2108                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2109                 iwlcore_commit_rxon(priv);
2110                 spin_lock_irqsave(&priv->lock, flags);
2111                 iwl_activate_qos(priv, 1);
2112                 spin_unlock_irqrestore(&priv->lock, flags);
2113                 iwl_rxon_add_station(priv, iwl_bcast_addr, 0);
2114         }
2115         iwl_send_beacon_cmd(priv);
2116
2117         /* FIXME - we need to add code here to detect a totally new
2118          * configuration, reset the AP, unassoc, rxon timing, assoc,
2119          * clear sta table, add BCAST sta... */
2120 }
2121
2122 static void iwl_mac_update_tkip_key(struct ieee80211_hw *hw,
2123                         struct ieee80211_key_conf *keyconf, const u8 *addr,
2124                         u32 iv32, u16 *phase1key)
2125 {
2126
2127         struct iwl_priv *priv = hw->priv;
2128         IWL_DEBUG_MAC80211(priv, "enter\n");
2129
2130         iwl_update_tkip_key(priv, keyconf, addr, iv32, phase1key);
2131
2132         IWL_DEBUG_MAC80211(priv, "leave\n");
2133 }
2134
2135 static int iwl_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
2136                            struct ieee80211_vif *vif,
2137                            struct ieee80211_sta *sta,
2138                            struct ieee80211_key_conf *key)
2139 {
2140         struct iwl_priv *priv = hw->priv;
2141         const u8 *addr;
2142         int ret;
2143         u8 sta_id;
2144         bool is_default_wep_key = false;
2145
2146         IWL_DEBUG_MAC80211(priv, "enter\n");
2147
2148         if (priv->hw_params.sw_crypto) {
2149                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
2150                 return -EOPNOTSUPP;
2151         }
2152         addr = sta ? sta->addr : iwl_bcast_addr;
2153         sta_id = priv->cfg->ops->smgmt->find_station(priv, addr);
2154         if (sta_id == IWL_INVALID_STATION) {
2155                 IWL_DEBUG_MAC80211(priv, "leave - %pM not in station map.\n",
2156                                    addr);
2157                 return -EINVAL;
2158
2159         }
2160
2161         mutex_lock(&priv->mutex);
2162         iwl_scan_cancel_timeout(priv, 100);
2163         mutex_unlock(&priv->mutex);
2164
2165         /* If we are getting WEP group key and we didn't receive any key mapping
2166          * so far, we are in legacy wep mode (group key only), otherwise we are
2167          * in 1X mode.
2168          * In legacy wep mode, we use another host command to the uCode */
2169         if (key->alg == ALG_WEP && sta_id == priv->hw_params.bcast_sta_id &&
2170                 priv->iw_mode != NL80211_IFTYPE_AP) {
2171                 if (cmd == SET_KEY)
2172                         is_default_wep_key = !priv->key_mapping_key;
2173                 else
2174                         is_default_wep_key =
2175                                         (key->hw_key_idx == HW_KEY_DEFAULT);
2176         }
2177
2178         switch (cmd) {
2179         case SET_KEY:
2180                 if (is_default_wep_key)
2181                         ret = iwl_set_default_wep_key(priv, key);
2182                 else
2183                         ret = iwl_set_dynamic_key(priv, key, sta_id);
2184
2185                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
2186                 break;
2187         case DISABLE_KEY:
2188                 if (is_default_wep_key)
2189                         ret = iwl_remove_default_wep_key(priv, key);
2190                 else
2191                         ret = iwl_remove_dynamic_key(priv, key, sta_id);
2192
2193                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
2194                 break;
2195         default:
2196                 ret = -EINVAL;
2197         }
2198
2199         IWL_DEBUG_MAC80211(priv, "leave\n");
2200
2201         return ret;
2202 }
2203
2204 static int iwl_mac_ampdu_action(struct ieee80211_hw *hw,
2205                              enum ieee80211_ampdu_mlme_action action,
2206                              struct ieee80211_sta *sta, u16 tid, u16 *ssn)
2207 {
2208         struct iwl_priv *priv = hw->priv;
2209         int ret;
2210
2211         IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n",
2212                      sta->addr, tid);
2213
2214         if (!(priv->cfg->sku & IWL_SKU_N))
2215                 return -EACCES;
2216
2217         switch (action) {
2218         case IEEE80211_AMPDU_RX_START:
2219                 IWL_DEBUG_HT(priv, "start Rx\n");
2220                 return iwl_sta_rx_agg_start(priv, sta->addr, tid, *ssn);
2221         case IEEE80211_AMPDU_RX_STOP:
2222                 IWL_DEBUG_HT(priv, "stop Rx\n");
2223                 ret = iwl_sta_rx_agg_stop(priv, sta->addr, tid);
2224                 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2225                         return 0;
2226                 else
2227                         return ret;
2228         case IEEE80211_AMPDU_TX_START:
2229                 IWL_DEBUG_HT(priv, "start Tx\n");
2230                 return iwl_tx_agg_start(priv, sta->addr, tid, ssn);
2231         case IEEE80211_AMPDU_TX_STOP:
2232                 IWL_DEBUG_HT(priv, "stop Tx\n");
2233                 ret = iwl_tx_agg_stop(priv, sta->addr, tid);
2234                 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2235                         return 0;
2236                 else
2237                         return ret;
2238         default:
2239                 IWL_DEBUG_HT(priv, "unknown\n");
2240                 return -EINVAL;
2241                 break;
2242         }
2243         return 0;
2244 }
2245
2246 static int iwl_mac_get_stats(struct ieee80211_hw *hw,
2247                              struct ieee80211_low_level_stats *stats)
2248 {
2249         struct iwl_priv *priv = hw->priv;
2250
2251         priv = hw->priv;
2252         IWL_DEBUG_MAC80211(priv, "enter\n");
2253         IWL_DEBUG_MAC80211(priv, "leave\n");
2254
2255         return 0;
2256 }
2257
2258 /*****************************************************************************
2259  *
2260  * sysfs attributes
2261  *
2262  *****************************************************************************/
2263
2264 #ifdef CONFIG_IWLWIFI_DEBUG
2265
2266 /*
2267  * The following adds a new attribute to the sysfs representation
2268  * of this device driver (i.e. a new file in /sys/class/net/wlan0/device/)
2269  * used for controlling the debug level.
2270  *
2271  * See the level definitions in iwl for details.
2272  */
2273
2274 static ssize_t show_debug_level(struct device *d,
2275                                 struct device_attribute *attr, char *buf)
2276 {
2277         struct iwl_priv *priv = d->driver_data;
2278
2279         return sprintf(buf, "0x%08X\n", priv->debug_level);
2280 }
2281 static ssize_t store_debug_level(struct device *d,
2282                                 struct device_attribute *attr,
2283                                  const char *buf, size_t count)
2284 {
2285         struct iwl_priv *priv = d->driver_data;
2286         unsigned long val;
2287         int ret;
2288
2289         ret = strict_strtoul(buf, 0, &val);
2290         if (ret)
2291                 IWL_ERR(priv, "%s is not in hex or decimal form.\n", buf);
2292         else
2293                 priv->debug_level = val;
2294
2295         return strnlen(buf, count);
2296 }
2297
2298 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
2299                         show_debug_level, store_debug_level);
2300
2301
2302 #endif /* CONFIG_IWLWIFI_DEBUG */
2303
2304
2305 static ssize_t show_version(struct device *d,
2306                                 struct device_attribute *attr, char *buf)
2307 {
2308         struct iwl_priv *priv = d->driver_data;
2309         struct iwl_alive_resp *palive = &priv->card_alive;
2310         ssize_t pos = 0;
2311         u16 eeprom_ver;
2312
2313         if (palive->is_valid)
2314                 pos += sprintf(buf + pos,
2315                                 "fw version: 0x%01X.0x%01X.0x%01X.0x%01X\n"
2316                                 "fw type: 0x%01X 0x%01X\n",
2317                                 palive->ucode_major, palive->ucode_minor,
2318                                 palive->sw_rev[0], palive->sw_rev[1],
2319                                 palive->ver_type, palive->ver_subtype);
2320         else
2321                 pos += sprintf(buf + pos, "fw not loaded\n");
2322
2323         if (priv->eeprom) {
2324                 eeprom_ver = iwl_eeprom_query16(priv, EEPROM_VERSION);
2325                 pos += sprintf(buf + pos, "EEPROM version: 0x%x\n",
2326                                  eeprom_ver);
2327         } else {
2328                 pos += sprintf(buf + pos, "EEPROM not initialzed\n");
2329         }
2330
2331         return pos;
2332 }
2333
2334 static DEVICE_ATTR(version, S_IWUSR | S_IRUGO, show_version, NULL);
2335
2336 static ssize_t show_temperature(struct device *d,
2337                                 struct device_attribute *attr, char *buf)
2338 {
2339         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
2340
2341         if (!iwl_is_alive(priv))
2342                 return -EAGAIN;
2343
2344         return sprintf(buf, "%d\n", priv->temperature);
2345 }
2346
2347 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
2348
2349 static ssize_t show_tx_power(struct device *d,
2350                              struct device_attribute *attr, char *buf)
2351 {
2352         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
2353
2354         if (!iwl_is_ready_rf(priv))
2355                 return sprintf(buf, "off\n");
2356         else
2357                 return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
2358 }
2359
2360 static ssize_t store_tx_power(struct device *d,
2361                               struct device_attribute *attr,
2362                               const char *buf, size_t count)
2363 {
2364         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
2365         unsigned long val;
2366         int ret;
2367
2368         ret = strict_strtoul(buf, 10, &val);
2369         if (ret)
2370                 IWL_INFO(priv, "%s is not in decimal form.\n", buf);
2371         else
2372                 iwl_set_tx_power(priv, val, false);
2373
2374         return count;
2375 }
2376
2377 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
2378
2379 static ssize_t show_flags(struct device *d,
2380                           struct device_attribute *attr, char *buf)
2381 {
2382         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
2383
2384         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
2385 }
2386
2387 static ssize_t store_flags(struct device *d,
2388                            struct device_attribute *attr,
2389                            const char *buf, size_t count)
2390 {
2391         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
2392         unsigned long val;
2393         u32 flags;
2394         int ret = strict_strtoul(buf, 0, &val);
2395         if (ret)
2396                 return ret;
2397         flags = (u32)val;
2398
2399         mutex_lock(&priv->mutex);
2400         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
2401                 /* Cancel any currently running scans... */
2402                 if (iwl_scan_cancel_timeout(priv, 100))
2403                         IWL_WARN(priv, "Could not cancel scan.\n");
2404                 else {
2405                         IWL_DEBUG_INFO(priv, "Commit rxon.flags = 0x%04X\n", flags);
2406                         priv->staging_rxon.flags = cpu_to_le32(flags);
2407                         iwlcore_commit_rxon(priv);
2408                 }
2409         }
2410         mutex_unlock(&priv->mutex);
2411
2412         return count;
2413 }
2414
2415 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
2416
2417 static ssize_t show_filter_flags(struct device *d,
2418                                  struct device_attribute *attr, char *buf)
2419 {
2420         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
2421
2422         return sprintf(buf, "0x%04X\n",
2423                 le32_to_cpu(priv->active_rxon.filter_flags));
2424 }
2425
2426 static ssize_t store_filter_flags(struct device *d,
2427                                   struct device_attribute *attr,
2428                                   const char *buf, size_t count)
2429 {
2430         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
2431         unsigned long val;
2432         u32 filter_flags;
2433         int ret = strict_strtoul(buf, 0, &val);
2434         if (ret)
2435                 return ret;
2436         filter_flags = (u32)val;
2437
2438         mutex_lock(&priv->mutex);
2439         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
2440                 /* Cancel any currently running scans... */
2441                 if (iwl_scan_cancel_timeout(priv, 100))
2442                         IWL_WARN(priv, "Could not cancel scan.\n");
2443                 else {
2444                         IWL_DEBUG_INFO(priv, "Committing rxon.filter_flags = "
2445                                        "0x%04X\n", filter_flags);
2446                         priv->staging_rxon.filter_flags =
2447                                 cpu_to_le32(filter_flags);
2448                         iwlcore_commit_rxon(priv);
2449                 }
2450         }
2451         mutex_unlock(&priv->mutex);
2452
2453         return count;
2454 }
2455
2456 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
2457                    store_filter_flags);
2458
2459 static ssize_t store_power_level(struct device *d,
2460                                  struct device_attribute *attr,
2461                                  const char *buf, size_t count)
2462 {
2463         struct iwl_priv *priv = dev_get_drvdata(d);
2464         int ret;
2465         unsigned long mode;
2466
2467
2468         mutex_lock(&priv->mutex);
2469
2470         ret = strict_strtoul(buf, 10, &mode);
2471         if (ret)
2472                 goto out;
2473
2474         ret = iwl_power_set_user_mode(priv, mode);
2475         if (ret) {
2476                 IWL_DEBUG_MAC80211(priv, "failed setting power mode.\n");
2477                 goto out;
2478         }
2479         ret = count;
2480
2481  out:
2482         mutex_unlock(&priv->mutex);
2483         return ret;
2484 }
2485
2486 static ssize_t show_power_level(struct device *d,
2487                                 struct device_attribute *attr, char *buf)
2488 {
2489         struct iwl_priv *priv = dev_get_drvdata(d);
2490         int mode = priv->power_data.user_power_setting;
2491         int system = priv->power_data.system_power_setting;
2492         int level = priv->power_data.power_mode;
2493         char *p = buf;
2494
2495         switch (system) {
2496         case IWL_POWER_SYS_AUTO:
2497                 p += sprintf(p, "SYSTEM:auto");
2498                 break;
2499         case IWL_POWER_SYS_AC:
2500                 p += sprintf(p, "SYSTEM:ac");
2501                 break;
2502         case IWL_POWER_SYS_BATTERY:
2503                 p += sprintf(p, "SYSTEM:battery");
2504                 break;
2505         }
2506
2507         p += sprintf(p, "\tMODE:%s", (mode < IWL_POWER_AUTO) ?
2508                         "fixed" : "auto");
2509         p += sprintf(p, "\tINDEX:%d", level);
2510         p += sprintf(p, "\n");
2511         return p - buf + 1;
2512 }
2513
2514 static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR, show_power_level,
2515                    store_power_level);
2516
2517
2518 static ssize_t show_statistics(struct device *d,
2519                                struct device_attribute *attr, char *buf)
2520 {
2521         struct iwl_priv *priv = dev_get_drvdata(d);
2522         u32 size = sizeof(struct iwl_notif_statistics);
2523         u32 len = 0, ofs = 0;
2524         u8 *data = (u8 *)&priv->statistics;
2525         int rc = 0;
2526
2527         if (!iwl_is_alive(priv))
2528                 return -EAGAIN;
2529
2530         mutex_lock(&priv->mutex);
2531         rc = iwl_send_statistics_request(priv, 0);
2532         mutex_unlock(&priv->mutex);
2533
2534         if (rc) {
2535                 len = sprintf(buf,
2536                               "Error sending statistics request: 0x%08X\n", rc);
2537                 return len;
2538         }
2539
2540         while (size && (PAGE_SIZE - len)) {
2541                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
2542                                    PAGE_SIZE - len, 1);
2543                 len = strlen(buf);
2544                 if (PAGE_SIZE - len)
2545                         buf[len++] = '\n';
2546
2547                 ofs += 16;
2548                 size -= min(size, 16U);
2549         }
2550
2551         return len;
2552 }
2553
2554 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
2555
2556
2557 /*****************************************************************************
2558  *
2559  * driver setup and teardown
2560  *
2561  *****************************************************************************/
2562
2563 static void iwl_setup_deferred_work(struct iwl_priv *priv)
2564 {
2565         priv->workqueue = create_singlethread_workqueue(DRV_NAME);
2566
2567         init_waitqueue_head(&priv->wait_command_queue);
2568
2569         INIT_WORK(&priv->up, iwl_bg_up);
2570         INIT_WORK(&priv->restart, iwl_bg_restart);
2571         INIT_WORK(&priv->rx_replenish, iwl_bg_rx_replenish);
2572         INIT_WORK(&priv->rf_kill, iwl_bg_rf_kill);
2573         INIT_WORK(&priv->beacon_update, iwl_bg_beacon_update);
2574         INIT_WORK(&priv->run_time_calib_work, iwl_bg_run_time_calib_work);
2575         INIT_DELAYED_WORK(&priv->init_alive_start, iwl_bg_init_alive_start);
2576         INIT_DELAYED_WORK(&priv->alive_start, iwl_bg_alive_start);
2577
2578         iwl_setup_scan_deferred_work(priv);
2579         iwl_setup_power_deferred_work(priv);
2580
2581         if (priv->cfg->ops->lib->setup_deferred_work)
2582                 priv->cfg->ops->lib->setup_deferred_work(priv);
2583
2584         init_timer(&priv->statistics_periodic);
2585         priv->statistics_periodic.data = (unsigned long)priv;
2586         priv->statistics_periodic.function = iwl_bg_statistics_periodic;
2587
2588         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
2589                      iwl_irq_tasklet, (unsigned long)priv);
2590 }
2591
2592 static void iwl_cancel_deferred_work(struct iwl_priv *priv)
2593 {
2594         if (priv->cfg->ops->lib->cancel_deferred_work)
2595                 priv->cfg->ops->lib->cancel_deferred_work(priv);
2596
2597         cancel_delayed_work_sync(&priv->init_alive_start);
2598         cancel_delayed_work(&priv->scan_check);
2599         cancel_delayed_work_sync(&priv->set_power_save);
2600         cancel_delayed_work(&priv->alive_start);
2601         cancel_work_sync(&priv->beacon_update);
2602         del_timer_sync(&priv->statistics_periodic);
2603 }
2604
2605 static struct attribute *iwl_sysfs_entries[] = {
2606         &dev_attr_flags.attr,
2607         &dev_attr_filter_flags.attr,
2608         &dev_attr_power_level.attr,
2609         &dev_attr_statistics.attr,
2610         &dev_attr_temperature.attr,
2611         &dev_attr_tx_power.attr,
2612 #ifdef CONFIG_IWLWIFI_DEBUG
2613         &dev_attr_debug_level.attr,
2614 #endif
2615         &dev_attr_version.attr,
2616
2617         NULL
2618 };
2619
2620 static struct attribute_group iwl_attribute_group = {
2621         .name = NULL,           /* put in device directory */
2622         .attrs = iwl_sysfs_entries,
2623 };
2624
2625 static struct ieee80211_ops iwl_hw_ops = {
2626         .tx = iwl_mac_tx,
2627         .start = iwl_mac_start,
2628         .stop = iwl_mac_stop,
2629         .add_interface = iwl_mac_add_interface,
2630         .remove_interface = iwl_mac_remove_interface,
2631         .config = iwl_mac_config,
2632         .config_interface = iwl_mac_config_interface,
2633         .configure_filter = iwl_configure_filter,
2634         .set_key = iwl_mac_set_key,
2635         .update_tkip_key = iwl_mac_update_tkip_key,
2636         .get_stats = iwl_mac_get_stats,
2637         .get_tx_stats = iwl_mac_get_tx_stats,
2638         .conf_tx = iwl_mac_conf_tx,
2639         .reset_tsf = iwl_mac_reset_tsf,
2640         .bss_info_changed = iwl_bss_info_changed,
2641         .ampdu_action = iwl_mac_ampdu_action,
2642         .hw_scan = iwl_mac_hw_scan
2643 };
2644
2645 static int iwl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2646 {
2647         int err = 0;
2648         struct iwl_priv *priv;
2649         struct ieee80211_hw *hw;
2650         struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
2651         unsigned long flags;
2652         u16 pci_cmd;
2653
2654         /************************
2655          * 1. Allocating HW data
2656          ************************/
2657
2658         /* Disabling hardware scan means that mac80211 will perform scans
2659          * "the hard way", rather than using device's scan. */
2660         if (cfg->mod_params->disable_hw_scan) {
2661                 if (cfg->mod_params->debug & IWL_DL_INFO)
2662                         dev_printk(KERN_DEBUG, &(pdev->dev),
2663                                    "Disabling hw_scan\n");
2664                 iwl_hw_ops.hw_scan = NULL;
2665         }
2666
2667         hw = iwl_alloc_all(cfg, &iwl_hw_ops);
2668         if (!hw) {
2669                 err = -ENOMEM;
2670                 goto out;
2671         }
2672         priv = hw->priv;
2673         /* At this point both hw and priv are allocated. */
2674
2675         SET_IEEE80211_DEV(hw, &pdev->dev);
2676
2677         IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
2678         priv->cfg = cfg;
2679         priv->pci_dev = pdev;
2680
2681 #ifdef CONFIG_IWLWIFI_DEBUG
2682         priv->debug_level = priv->cfg->mod_params->debug;
2683         atomic_set(&priv->restrict_refcnt, 0);
2684 #endif
2685
2686         /**************************
2687          * 2. Initializing PCI bus
2688          **************************/
2689         if (pci_enable_device(pdev)) {
2690                 err = -ENODEV;
2691                 goto out_ieee80211_free_hw;
2692         }
2693
2694         pci_set_master(pdev);
2695
2696         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(36));
2697         if (!err)
2698                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(36));
2699         if (err) {
2700                 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
2701                 if (!err)
2702                         err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
2703                 /* both attempts failed: */
2704                 if (err) {
2705                         IWL_WARN(priv, "No suitable DMA available.\n");
2706                         goto out_pci_disable_device;
2707                 }
2708         }
2709
2710         err = pci_request_regions(pdev, DRV_NAME);
2711         if (err)
2712                 goto out_pci_disable_device;
2713
2714         pci_set_drvdata(pdev, priv);
2715
2716
2717         /***********************
2718          * 3. Read REV register
2719          ***********************/
2720         priv->hw_base = pci_iomap(pdev, 0, 0);
2721         if (!priv->hw_base) {
2722                 err = -ENODEV;
2723                 goto out_pci_release_regions;
2724         }
2725
2726         IWL_DEBUG_INFO(priv, "pci_resource_len = 0x%08llx\n",
2727                 (unsigned long long) pci_resource_len(pdev, 0));
2728         IWL_DEBUG_INFO(priv, "pci_resource_base = %p\n", priv->hw_base);
2729
2730         iwl_hw_detect(priv);
2731         IWL_INFO(priv, "Detected Intel Wireless WiFi Link %s REV=0x%X\n",
2732                 priv->cfg->name, priv->hw_rev);
2733
2734         /* We disable the RETRY_TIMEOUT register (0x41) to keep
2735          * PCI Tx retries from interfering with C3 CPU state */
2736         pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
2737
2738         /* amp init */
2739         err = priv->cfg->ops->lib->apm_ops.init(priv);
2740         if (err < 0) {
2741                 IWL_ERR(priv, "Failed to init APMG\n");
2742                 goto out_iounmap;
2743         }
2744         /*****************
2745          * 4. Read EEPROM
2746          *****************/
2747         /* Read the EEPROM */
2748         err = iwl_eeprom_init(priv);
2749         if (err) {
2750                 IWL_ERR(priv, "Unable to init EEPROM\n");
2751                 goto out_iounmap;
2752         }
2753         err = iwl_eeprom_check_version(priv);
2754         if (err)
2755                 goto out_free_eeprom;
2756
2757         /* extract MAC Address */
2758         iwl_eeprom_get_mac(priv, priv->mac_addr);
2759         IWL_DEBUG_INFO(priv, "MAC address: %pM\n", priv->mac_addr);
2760         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
2761
2762         /************************
2763          * 5. Setup HW constants
2764          ************************/
2765         if (iwl_set_hw_params(priv)) {
2766                 IWL_ERR(priv, "failed to set hw parameters\n");
2767                 goto out_free_eeprom;
2768         }
2769
2770         /*******************
2771          * 6. Setup priv
2772          *******************/
2773
2774         err = iwl_init_drv(priv);
2775         if (err)
2776                 goto out_free_eeprom;
2777         /* At this point both hw and priv are initialized. */
2778
2779         /**********************************
2780          * 7. Initialize module parameters
2781          **********************************/
2782
2783         /* Disable radio (SW RF KILL) via parameter when loading driver */
2784         if (priv->cfg->mod_params->disable) {
2785                 set_bit(STATUS_RF_KILL_SW, &priv->status);
2786                 IWL_DEBUG_INFO(priv, "Radio disabled.\n");
2787         }
2788
2789         /********************
2790          * 8. Setup services
2791          ********************/
2792         spin_lock_irqsave(&priv->lock, flags);
2793         iwl_disable_interrupts(priv);
2794         spin_unlock_irqrestore(&priv->lock, flags);
2795
2796         pci_enable_msi(priv->pci_dev);
2797
2798         err = request_irq(priv->pci_dev->irq, iwl_isr, IRQF_SHARED,
2799                           DRV_NAME, priv);
2800         if (err) {
2801                 IWL_ERR(priv, "Error allocating IRQ %d\n", priv->pci_dev->irq);
2802                 goto out_disable_msi;
2803         }
2804         err = sysfs_create_group(&pdev->dev.kobj, &iwl_attribute_group);
2805         if (err) {
2806                 IWL_ERR(priv, "failed to create sysfs device attributes\n");
2807                 goto out_free_irq;
2808         }
2809
2810         iwl_setup_deferred_work(priv);
2811         iwl_setup_rx_handlers(priv);
2812
2813         /**********************************
2814          * 9. Setup and register mac80211
2815          **********************************/
2816
2817         /* enable interrupts if needed: hw bug w/a */
2818         pci_read_config_word(priv->pci_dev, PCI_COMMAND, &pci_cmd);
2819         if (pci_cmd & PCI_COMMAND_INTX_DISABLE) {
2820                 pci_cmd &= ~PCI_COMMAND_INTX_DISABLE;
2821                 pci_write_config_word(priv->pci_dev, PCI_COMMAND, pci_cmd);
2822         }
2823
2824         iwl_enable_interrupts(priv);
2825
2826         err = iwl_setup_mac(priv);
2827         if (err)
2828                 goto out_remove_sysfs;
2829
2830         err = iwl_dbgfs_register(priv, DRV_NAME);
2831         if (err)
2832                 IWL_ERR(priv, "failed to create debugfs files\n");
2833
2834         /* If platform's RF_KILL switch is NOT set to KILL */
2835         if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
2836                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2837         else
2838                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2839
2840         err = iwl_rfkill_init(priv);
2841         if (err)
2842                 IWL_ERR(priv, "Unable to initialize RFKILL system. "
2843                                   "Ignoring error: %d\n", err);
2844         else
2845                 iwl_rfkill_set_hw_state(priv);
2846
2847         iwl_power_initialize(priv);
2848         return 0;
2849
2850  out_remove_sysfs:
2851         destroy_workqueue(priv->workqueue);
2852         priv->workqueue = NULL;
2853         sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
2854  out_free_irq:
2855         free_irq(priv->pci_dev->irq, priv);
2856  out_disable_msi:
2857         pci_disable_msi(priv->pci_dev);
2858         iwl_uninit_drv(priv);
2859  out_free_eeprom:
2860         iwl_eeprom_free(priv);
2861  out_iounmap:
2862         pci_iounmap(pdev, priv->hw_base);
2863  out_pci_release_regions:
2864         pci_set_drvdata(pdev, NULL);
2865         pci_release_regions(pdev);
2866  out_pci_disable_device:
2867         pci_disable_device(pdev);
2868  out_ieee80211_free_hw:
2869         ieee80211_free_hw(priv->hw);
2870  out:
2871         return err;
2872 }
2873
2874 static void __devexit iwl_pci_remove(struct pci_dev *pdev)
2875 {
2876         struct iwl_priv *priv = pci_get_drvdata(pdev);
2877         unsigned long flags;
2878
2879         if (!priv)
2880                 return;
2881
2882         IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
2883
2884         iwl_dbgfs_unregister(priv);
2885         sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
2886
2887         /* ieee80211_unregister_hw call wil cause iwl_mac_stop to
2888          * to be called and iwl_down since we are removing the device
2889          * we need to set STATUS_EXIT_PENDING bit.
2890          */
2891         set_bit(STATUS_EXIT_PENDING, &priv->status);
2892         if (priv->mac80211_registered) {
2893                 ieee80211_unregister_hw(priv->hw);
2894                 priv->mac80211_registered = 0;
2895         } else {
2896                 iwl_down(priv);
2897         }
2898
2899         /* make sure we flush any pending irq or
2900          * tasklet for the driver
2901          */
2902         spin_lock_irqsave(&priv->lock, flags);
2903         iwl_disable_interrupts(priv);
2904         spin_unlock_irqrestore(&priv->lock, flags);
2905
2906         iwl_synchronize_irq(priv);
2907
2908         iwl_rfkill_unregister(priv);
2909         iwl_dealloc_ucode_pci(priv);
2910
2911         if (priv->rxq.bd)
2912                 iwl_rx_queue_free(priv, &priv->rxq);
2913         iwl_hw_txq_ctx_free(priv);
2914
2915         priv->cfg->ops->smgmt->clear_station_table(priv);
2916         iwl_eeprom_free(priv);
2917
2918
2919         /*netif_stop_queue(dev); */
2920         flush_workqueue(priv->workqueue);
2921
2922         /* ieee80211_unregister_hw calls iwl_mac_stop, which flushes
2923          * priv->workqueue... so we can't take down the workqueue
2924          * until now... */
2925         destroy_workqueue(priv->workqueue);
2926         priv->workqueue = NULL;
2927
2928         free_irq(priv->pci_dev->irq, priv);
2929         pci_disable_msi(priv->pci_dev);
2930         pci_iounmap(pdev, priv->hw_base);
2931         pci_release_regions(pdev);
2932         pci_disable_device(pdev);
2933         pci_set_drvdata(pdev, NULL);
2934
2935         iwl_uninit_drv(priv);
2936
2937         if (priv->ibss_beacon)
2938                 dev_kfree_skb(priv->ibss_beacon);
2939
2940         ieee80211_free_hw(priv->hw);
2941 }
2942
2943
2944 /*****************************************************************************
2945  *
2946  * driver and module entry point
2947  *
2948  *****************************************************************************/
2949
2950 /* Hardware specific file defines the PCI IDs table for that hardware module */
2951 static struct pci_device_id iwl_hw_card_ids[] = {
2952 #ifdef CONFIG_IWL4965
2953         {IWL_PCI_DEVICE(0x4229, PCI_ANY_ID, iwl4965_agn_cfg)},
2954         {IWL_PCI_DEVICE(0x4230, PCI_ANY_ID, iwl4965_agn_cfg)},
2955 #endif /* CONFIG_IWL4965 */
2956 #ifdef CONFIG_IWL5000
2957         {IWL_PCI_DEVICE(0x4232, 0x1205, iwl5100_bg_cfg)},
2958         {IWL_PCI_DEVICE(0x4232, 0x1305, iwl5100_bg_cfg)},
2959         {IWL_PCI_DEVICE(0x4232, 0x1206, iwl5100_abg_cfg)},
2960         {IWL_PCI_DEVICE(0x4232, 0x1306, iwl5100_abg_cfg)},
2961         {IWL_PCI_DEVICE(0x4232, 0x1326, iwl5100_abg_cfg)},
2962         {IWL_PCI_DEVICE(0x4237, 0x1216, iwl5100_abg_cfg)},
2963         {IWL_PCI_DEVICE(0x4232, PCI_ANY_ID, iwl5100_agn_cfg)},
2964         {IWL_PCI_DEVICE(0x4235, PCI_ANY_ID, iwl5300_agn_cfg)},
2965         {IWL_PCI_DEVICE(0x4236, PCI_ANY_ID, iwl5300_agn_cfg)},
2966         {IWL_PCI_DEVICE(0x4237, PCI_ANY_ID, iwl5100_agn_cfg)},
2967 /* 5350 WiFi/WiMax */
2968         {IWL_PCI_DEVICE(0x423A, 0x1001, iwl5350_agn_cfg)},
2969         {IWL_PCI_DEVICE(0x423A, 0x1021, iwl5350_agn_cfg)},
2970         {IWL_PCI_DEVICE(0x423B, 0x1011, iwl5350_agn_cfg)},
2971 /* 5150 Wifi/WiMax */
2972         {IWL_PCI_DEVICE(0x423C, PCI_ANY_ID, iwl5150_agn_cfg)},
2973         {IWL_PCI_DEVICE(0x423D, PCI_ANY_ID, iwl5150_agn_cfg)},
2974 /* 6000/6050 Series */
2975         {IWL_PCI_DEVICE(0x0082, 0x1102, iwl6000_2ag_cfg)},
2976         {IWL_PCI_DEVICE(0x0085, 0x1112, iwl6000_2ag_cfg)},
2977         {IWL_PCI_DEVICE(0x0082, 0x1122, iwl6000_2ag_cfg)},
2978         {IWL_PCI_DEVICE(0x422B, PCI_ANY_ID, iwl6000_3agn_cfg)},
2979         {IWL_PCI_DEVICE(0x4238, PCI_ANY_ID, iwl6000_3agn_cfg)},
2980         {IWL_PCI_DEVICE(0x0082, PCI_ANY_ID, iwl6000_2agn_cfg)},
2981         {IWL_PCI_DEVICE(0x0085, PCI_ANY_ID, iwl6000_3agn_cfg)},
2982         {IWL_PCI_DEVICE(0x0086, PCI_ANY_ID, iwl6050_3agn_cfg)},
2983         {IWL_PCI_DEVICE(0x0087, PCI_ANY_ID, iwl6050_2agn_cfg)},
2984         {IWL_PCI_DEVICE(0x0088, PCI_ANY_ID, iwl6050_3agn_cfg)},
2985         {IWL_PCI_DEVICE(0x0089, PCI_ANY_ID, iwl6050_2agn_cfg)},
2986 /* 1000 Series WiFi */
2987         {IWL_PCI_DEVICE(0x0083, PCI_ANY_ID, iwl1000_bgn_cfg)},
2988         {IWL_PCI_DEVICE(0x0084, PCI_ANY_ID, iwl1000_bgn_cfg)},
2989 #endif /* CONFIG_IWL5000 */
2990
2991         {0}
2992 };
2993 MODULE_DEVICE_TABLE(pci, iwl_hw_card_ids);
2994
2995 static struct pci_driver iwl_driver = {
2996         .name = DRV_NAME,
2997         .id_table = iwl_hw_card_ids,
2998         .probe = iwl_pci_probe,
2999         .remove = __devexit_p(iwl_pci_remove),
3000 #ifdef CONFIG_PM
3001         .suspend = iwl_pci_suspend,
3002         .resume = iwl_pci_resume,
3003 #endif
3004 };
3005
3006 static int __init iwl_init(void)
3007 {
3008
3009         int ret;
3010         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
3011         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
3012
3013         ret = iwlagn_rate_control_register();
3014         if (ret) {
3015                 printk(KERN_ERR DRV_NAME
3016                        "Unable to register rate control algorithm: %d\n", ret);
3017                 return ret;
3018         }
3019
3020         ret = pci_register_driver(&iwl_driver);
3021         if (ret) {
3022                 printk(KERN_ERR DRV_NAME "Unable to initialize PCI module\n");
3023                 goto error_register;
3024         }
3025
3026         return ret;
3027
3028 error_register:
3029         iwlagn_rate_control_unregister();
3030         return ret;
3031 }
3032
3033 static void __exit iwl_exit(void)
3034 {
3035         pci_unregister_driver(&iwl_driver);
3036         iwlagn_rate_control_unregister();
3037 }
3038
3039 module_exit(iwl_exit);
3040 module_init(iwl_init);