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 static 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         iwl_clear_stations_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         iwl_set_rxon_chain(priv);
 250         iwl_commit_rxon(priv);
 251 }
 252
 253 static void iwl_clear_free_frames(struct iwl_priv *priv)
 254 {
 255         struct list_head *element;
 256
 257         IWL_DEBUG_INFO(priv, "%d frames on pre-allocated heap on clear.\n",
 258                        priv->frames_count);
 259
 260         while (!list_empty(&priv->free_frames)) {
 261                 element = priv->free_frames.next;
 262                 list_del(element);
 263                 kfree(list_entry(element, struct iwl_frame, list));
 264                 priv->frames_count--;
 265         }
 266
 267         if (priv->frames_count) {
 268                 IWL_WARN(priv, "%d frames still in use.  Did we lose one?\n",
 269                             priv->frames_count);
 270                 priv->frames_count = 0;
 271         }
 272 }
 273
 274 static struct iwl_frame *iwl_get_free_frame(struct iwl_priv *priv)
 275 {
 276         struct iwl_frame *frame;
 277         struct list_head *element;
 278         if (list_empty(&priv->free_frames)) {
 279                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
 280                 if (!frame) {
 281                         IWL_ERR(priv, "Could not allocate frame!\n");
 282                         return NULL;
 283                 }
 284
 285                 priv->frames_count++;
 286                 return frame;
 287         }
 288
 289         element = priv->free_frames.next;
 290         list_del(element);
 291         return list_entry(element, struct iwl_frame, list);
 292 }
 293
 294 static void iwl_free_frame(struct iwl_priv *priv, struct iwl_frame *frame)
 295 {
 296         memset(frame, 0, sizeof(*frame));
 297         list_add(&frame->list, &priv->free_frames);
 298 }
 299
 300 static unsigned int iwl_fill_beacon_frame(struct iwl_priv *priv,
 301                                           struct ieee80211_hdr *hdr,
 302                                           int left)
 303 {
 304         if (!iwl_is_associated(priv) || !priv->ibss_beacon ||
 305             ((priv->iw_mode != NL80211_IFTYPE_ADHOC) &&
 306              (priv->iw_mode != NL80211_IFTYPE_AP)))
 307                 return 0;
 308
 309         if (priv->ibss_beacon->len > left)
 310                 return 0;
 311
 312         memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
 313
 314         return priv->ibss_beacon->len;
 315 }
 316
 317 static unsigned int iwl_hw_get_beacon_cmd(struct iwl_priv *priv,
 318                                        struct iwl_frame *frame, u8 rate)
 319 {
 320         struct iwl_tx_beacon_cmd *tx_beacon_cmd;
 321         unsigned int frame_size;
 322
 323         tx_beacon_cmd = &frame->u.beacon;
 324         memset(tx_beacon_cmd, 0, sizeof(*tx_beacon_cmd));
 325
 326         tx_beacon_cmd->tx.sta_id = priv->hw_params.bcast_sta_id;
 327         tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
 328
 329         frame_size = iwl_fill_beacon_frame(priv, tx_beacon_cmd->frame,
 330                                 sizeof(frame->u) - sizeof(*tx_beacon_cmd));
 331
 332         BUG_ON(frame_size > MAX_MPDU_SIZE);
 333         tx_beacon_cmd->tx.len = cpu_to_le16((u16)frame_size);
 334
 335         if ((rate == IWL_RATE_1M_PLCP) || (rate >= IWL_RATE_2M_PLCP))
 336                 tx_beacon_cmd->tx.rate_n_flags =
 337                         iwl_hw_set_rate_n_flags(rate, RATE_MCS_CCK_MSK);
 338         else
 339                 tx_beacon_cmd->tx.rate_n_flags =
 340                         iwl_hw_set_rate_n_flags(rate, 0);
 341
 342         tx_beacon_cmd->tx.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK |
 343                                      TX_CMD_FLG_TSF_MSK |
 344                                      TX_CMD_FLG_STA_RATE_MSK;
 345
 346         return sizeof(*tx_beacon_cmd) + frame_size;
 347 }
 348 static int iwl_send_beacon_cmd(struct iwl_priv *priv)
 349 {
 350         struct iwl_frame *frame;
 351         unsigned int frame_size;
 352         int rc;
 353         u8 rate;
 354
 355         frame = iwl_get_free_frame(priv);
 356
 357         if (!frame) {
 358                 IWL_ERR(priv, "Could not obtain free frame buffer for beacon "
 359                           "command.\n");
 360                 return -ENOMEM;
 361         }
 362
 363         rate = iwl_rate_get_lowest_plcp(priv);
 364
 365         frame_size = iwl_hw_get_beacon_cmd(priv, frame, rate);
 366
 367         rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
 368                               &frame->u.cmd[0]);
 369
 370         iwl_free_frame(priv, frame);
 371
 372         return rc;
 373 }
 374
 375 static inline dma_addr_t iwl_tfd_tb_get_addr(struct iwl_tfd *tfd, u8 idx)
 376 {
 377         struct iwl_tfd_tb *tb = &tfd->tbs[idx];
 378
 379         dma_addr_t addr = get_unaligned_le32(&tb->lo);
 380         if (sizeof(dma_addr_t) > sizeof(u32))
 381                 addr |=
 382                 ((dma_addr_t)(le16_to_cpu(tb->hi_n_len) & 0xF) << 16) << 16;
 383
 384         return addr;
 385 }
 386
 387 static inline u16 iwl_tfd_tb_get_len(struct iwl_tfd *tfd, u8 idx)
 388 {
 389         struct iwl_tfd_tb *tb = &tfd->tbs[idx];
 390
 391         return le16_to_cpu(tb->hi_n_len) >> 4;
 392 }
 393
 394 static inline void iwl_tfd_set_tb(struct iwl_tfd *tfd, u8 idx,
 395                                   dma_addr_t addr, u16 len)
 396 {
 397         struct iwl_tfd_tb *tb = &tfd->tbs[idx];
 398         u16 hi_n_len = len << 4;
 399
 400         put_unaligned_le32(addr, &tb->lo);
 401         if (sizeof(dma_addr_t) > sizeof(u32))
 402                 hi_n_len |= ((addr >> 16) >> 16) & 0xF;
 403
 404         tb->hi_n_len = cpu_to_le16(hi_n_len);
 405
 406         tfd->num_tbs = idx + 1;
 407 }
 408
 409 static inline u8 iwl_tfd_get_num_tbs(struct iwl_tfd *tfd)
 410 {
 411         return tfd->num_tbs & 0x1f;
 412 }
 413
 414 /**
 415  * iwl_hw_txq_free_tfd - Free all chunks referenced by TFD [txq->q.read_ptr]
 416  * @priv - driver private data
 417  * @txq - tx queue
 418  *
 419  * Does NOT advance any TFD circular buffer read/write indexes
 420  * Does NOT free the TFD itself (which is within circular buffer)
 421  */
 422 void iwl_hw_txq_free_tfd(struct iwl_priv *priv, struct iwl_tx_queue *txq)
 423 {
 424         struct iwl_tfd *tfd_tmp = (struct iwl_tfd *)txq->tfds;
 425         struct iwl_tfd *tfd;
 426         struct pci_dev *dev = priv->pci_dev;
 427         int index = txq->q.read_ptr;
 428         int i;
 429         int num_tbs;
 430
 431         tfd = &tfd_tmp[index];
 432
 433         /* Sanity check on number of chunks */
 434         num_tbs = iwl_tfd_get_num_tbs(tfd);
 435
 436         if (num_tbs >= IWL_NUM_OF_TBS) {
 437                 IWL_ERR(priv, "Too many chunks: %i\n", num_tbs);
 438                 /* @todo issue fatal error, it is quite serious situation */
 439                 return;
 440         }
 441
 442         /* Unmap tx_cmd */
 443         if (num_tbs)
 444                 pci_unmap_single(dev,
 445                                 pci_unmap_addr(&txq->cmd[index]->meta, mapping),
 446                                 pci_unmap_len(&txq->cmd[index]->meta, len),
 447                                 PCI_DMA_BIDIRECTIONAL);
 448
 449         /* Unmap chunks, if any. */
 450         for (i = 1; i < num_tbs; i++) {
 451                 pci_unmap_single(dev, iwl_tfd_tb_get_addr(tfd, i),
 452                                 iwl_tfd_tb_get_len(tfd, i), PCI_DMA_TODEVICE);
 453
 454                 if (txq->txb) {
 455                         dev_kfree_skb(txq->txb[txq->q.read_ptr].skb[i - 1]);
 456                         txq->txb[txq->q.read_ptr].skb[i - 1] = NULL;
 457                 }
 458         }
 459 }
 460
 461 int iwl_hw_txq_attach_buf_to_tfd(struct iwl_priv *priv,
 462                                  struct iwl_tx_queue *txq,
 463                                  dma_addr_t addr, u16 len,
 464                                  u8 reset, u8 pad)
 465 {
 466         struct iwl_queue *q;
 467         struct iwl_tfd *tfd, *tfd_tmp;
 468         u32 num_tbs;
 469
 470         q = &txq->q;
 471         tfd_tmp = (struct iwl_tfd *)txq->tfds;
 472         tfd = &tfd_tmp[q->write_ptr];
 473
 474         if (reset)
 475                 memset(tfd, 0, sizeof(*tfd));
 476
 477         num_tbs = iwl_tfd_get_num_tbs(tfd);
 478
 479         /* Each TFD can point to a maximum 20 Tx buffers */
 480         if (num_tbs >= IWL_NUM_OF_TBS) {
 481                 IWL_ERR(priv, "Error can not send more than %d chunks\n",
 482                           IWL_NUM_OF_TBS);
 483                 return -EINVAL;
 484         }
 485
 486         BUG_ON(addr & ~DMA_BIT_MASK(36));
 487         if (unlikely(addr & ~IWL_TX_DMA_MASK))
 488                 IWL_ERR(priv, "Unaligned address = %llx\n",
 489                           (unsigned long long)addr);
 490
 491         iwl_tfd_set_tb(tfd, num_tbs, addr, len);
 492
 493         return 0;
 494 }
 495
 496 /*
 497  * Tell nic where to find circular buffer of Tx Frame Descriptors for
 498  * given Tx queue, and enable the DMA channel used for that queue.
 499  *
 500  * 4965 supports up to 16 Tx queues in DRAM, mapped to up to 8 Tx DMA
 501  * channels supported in hardware.
 502  */
 503 int iwl_hw_tx_queue_init(struct iwl_priv *priv,
 504                          struct iwl_tx_queue *txq)
 505 {
 506         int ret;
 507         unsigned long flags;
 508         int txq_id = txq->q.id;
 509
 510         spin_lock_irqsave(&priv->lock, flags);
 511         ret = iwl_grab_nic_access(priv);
 512         if (ret) {
 513                 spin_unlock_irqrestore(&priv->lock, flags);
 514                 return ret;
 515         }
 516
 517         /* Circular buffer (TFD queue in DRAM) physical base address */
 518         iwl_write_direct32(priv, FH_MEM_CBBC_QUEUE(txq_id),
 519                              txq->q.dma_addr >> 8);
 520
 521         iwl_release_nic_access(priv);
 522         spin_unlock_irqrestore(&priv->lock, flags);
 523
 524         return 0;
 525 }
 526
 527
 528 /******************************************************************************
 529  *
 530  * Misc. internal state and helper functions
 531  *
 532  ******************************************************************************/
 533
 534 static void iwl_ht_conf(struct iwl_priv *priv,
 535                             struct ieee80211_bss_conf *bss_conf)
 536 {
 537         struct ieee80211_sta_ht_cap *ht_conf;
 538         struct iwl_ht_info *iwl_conf = &priv->current_ht_config;
 539         struct ieee80211_sta *sta;
 540
 541         IWL_DEBUG_MAC80211(priv, "enter: \n");
 542
 543         if (!iwl_conf->is_ht)
 544                 return;
 545
 546
 547         /*
 548          * It is totally wrong to base global information on something
 549          * that is valid only when associated, alas, this driver works
 550          * that way and I don't know how to fix it.
 551          */
 552
 553         rcu_read_lock();
 554         sta = ieee80211_find_sta(priv->hw, priv->bssid);
 555         if (!sta) {
 556                 rcu_read_unlock();
 557                 return;
 558         }
 559         ht_conf = &sta->ht_cap;
 560
 561         if (ht_conf->cap & IEEE80211_HT_CAP_SGI_20)
 562                 iwl_conf->sgf |= HT_SHORT_GI_20MHZ;
 563         if (ht_conf->cap & IEEE80211_HT_CAP_SGI_40)
 564                 iwl_conf->sgf |= HT_SHORT_GI_40MHZ;
 565
 566         iwl_conf->is_green_field = !!(ht_conf->cap & IEEE80211_HT_CAP_GRN_FLD);
 567         iwl_conf->max_amsdu_size =
 568                 !!(ht_conf->cap & IEEE80211_HT_CAP_MAX_AMSDU);
 569
 570         iwl_conf->supported_chan_width =
 571                 !!(ht_conf->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40);
 572
 573         /*
 574          * XXX: The HT configuration needs to be moved into iwl_mac_config()
 575          *      to be done there correctly.
 576          */
 577
 578         iwl_conf->extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE;
 579         if (conf_is_ht40_minus(&priv->hw->conf))
 580                 iwl_conf->extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
 581         else if (conf_is_ht40_plus(&priv->hw->conf))
 582                 iwl_conf->extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
 583
 584         /* If no above or below channel supplied disable FAT channel */
 585         if (iwl_conf->extension_chan_offset != IEEE80211_HT_PARAM_CHA_SEC_ABOVE &&
 586             iwl_conf->extension_chan_offset != IEEE80211_HT_PARAM_CHA_SEC_BELOW)
 587                 iwl_conf->supported_chan_width = 0;
 588
 589         iwl_conf->sm_ps = (u8)((ht_conf->cap & IEEE80211_HT_CAP_SM_PS) >> 2);
 590
 591         memcpy(&iwl_conf->mcs, &ht_conf->mcs, 16);
 592
 593         iwl_conf->tx_chan_width = iwl_conf->supported_chan_width != 0;
 594         iwl_conf->ht_protection =
 595                 bss_conf->ht.operation_mode & IEEE80211_HT_OP_MODE_PROTECTION;
 596         iwl_conf->non_GF_STA_present =
 597                 !!(bss_conf->ht.operation_mode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
 598
 599         rcu_read_unlock();
 600
 601         IWL_DEBUG_MAC80211(priv, "leave\n");
 602 }
 603
 604 #define MAX_UCODE_BEACON_INTERVAL       4096
 605
 606 static u16 iwl_adjust_beacon_interval(u16 beacon_val)
 607 {
 608         u16 new_val = 0;
 609         u16 beacon_factor = 0;
 610
 611         beacon_factor = (beacon_val + MAX_UCODE_BEACON_INTERVAL)
 612                                         / MAX_UCODE_BEACON_INTERVAL;
 613         new_val = beacon_val / beacon_factor;
 614
 615         if (!new_val)
 616                 new_val = MAX_UCODE_BEACON_INTERVAL;
 617
 618         return new_val;
 619 }
 620
 621 static void iwl_setup_rxon_timing(struct iwl_priv *priv)
 622 {
 623         u64 tsf;
 624         s32 interval_tm, rem;
 625         unsigned long flags;
 626         struct ieee80211_conf *conf = NULL;
 627         u16 beacon_int = 0;
 628
 629         conf = ieee80211_get_hw_conf(priv->hw);
 630
 631         spin_lock_irqsave(&priv->lock, flags);
 632         priv->rxon_timing.timestamp = cpu_to_le64(priv->timestamp);
 633         priv->rxon_timing.listen_interval = cpu_to_le16(conf->listen_interval);
 634
 635         if (priv->iw_mode == NL80211_IFTYPE_STATION) {
 636                 beacon_int = iwl_adjust_beacon_interval(priv->beacon_int);
 637                 priv->rxon_timing.atim_window = 0;
 638         } else {
 639                 beacon_int = iwl_adjust_beacon_interval(conf->beacon_int);
 640
 641                 /* TODO: we need to get atim_window from upper stack
 642                  * for now we set to 0 */
 643                 priv->rxon_timing.atim_window = 0;
 644         }
 645
 646         priv->rxon_timing.beacon_interval = cpu_to_le16(beacon_int);
 647
 648         tsf = priv->timestamp; /* tsf is modifed by do_div: copy it */
 649         interval_tm = beacon_int * 1024;
 650         rem = do_div(tsf, interval_tm);
 651         priv->rxon_timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
 652
 653         spin_unlock_irqrestore(&priv->lock, flags);
 654         IWL_DEBUG_ASSOC(priv, "beacon interval %d beacon timer %d beacon tim %d\n",
 655                         le16_to_cpu(priv->rxon_timing.beacon_interval),
 656                         le32_to_cpu(priv->rxon_timing.beacon_init_val),
 657                         le16_to_cpu(priv->rxon_timing.atim_window));
 658 }
 659
 660 static int iwl_set_mode(struct iwl_priv *priv, int mode)
 661 {
 662         iwl_connection_init_rx_config(priv, mode);
 663         iwl_set_rxon_chain(priv);
 664         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
 665
 666         iwl_clear_stations_table(priv);
 667
 668         /* dont commit rxon if rf-kill is on*/
 669         if (!iwl_is_ready_rf(priv))
 670                 return -EAGAIN;
 671
 672         iwl_commit_rxon(priv);
 673
 674         return 0;
 675 }
 676
 677 /******************************************************************************
 678  *
 679  * Generic RX handler implementations
 680  *
 681  ******************************************************************************/
 682 static void iwl_rx_reply_alive(struct iwl_priv *priv,
 683                                 struct iwl_rx_mem_buffer *rxb)
 684 {
 685         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
 686         struct iwl_alive_resp *palive;
 687         struct delayed_work *pwork;
 688
 689         palive = &pkt->u.alive_frame;
 690
 691         IWL_DEBUG_INFO(priv, "Alive ucode status 0x%08X revision "
 692                        "0x%01X 0x%01X\n",
 693                        palive->is_valid, palive->ver_type,
 694                        palive->ver_subtype);
 695
 696         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
 697                 IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
 698                 memcpy(&priv->card_alive_init,
 699                        &pkt->u.alive_frame,
 700                        sizeof(struct iwl_init_alive_resp));
 701                 pwork = &priv->init_alive_start;
 702         } else {
 703                 IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
 704                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
 705                        sizeof(struct iwl_alive_resp));
 706                 pwork = &priv->alive_start;
 707         }
 708
 709         /* We delay the ALIVE response by 5ms to
 710          * give the HW RF Kill time to activate... */
 711         if (palive->is_valid == UCODE_VALID_OK)
 712                 queue_delayed_work(priv->workqueue, pwork,
 713                                    msecs_to_jiffies(5));
 714         else
 715                 IWL_WARN(priv, "uCode did not respond OK.\n");
 716 }
 717
 718 static void iwl_bg_beacon_update(struct work_struct *work)
 719 {
 720         struct iwl_priv *priv =
 721                 container_of(work, struct iwl_priv, beacon_update);
 722         struct sk_buff *beacon;
 723
 724         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
 725         beacon = ieee80211_beacon_get(priv->hw, priv->vif);
 726
 727         if (!beacon) {
 728                 IWL_ERR(priv, "update beacon failed\n");
 729                 return;
 730         }
 731
 732         mutex_lock(&priv->mutex);
 733         /* new beacon skb is allocated every time; dispose previous.*/
 734         if (priv->ibss_beacon)
 735                 dev_kfree_skb(priv->ibss_beacon);
 736
 737         priv->ibss_beacon = beacon;
 738         mutex_unlock(&priv->mutex);
 739
 740         iwl_send_beacon_cmd(priv);
 741 }
 742
 743 /**
 744  * iwl_bg_statistics_periodic - Timer callback to queue statistics
 745  *
 746  * This callback is provided in order to send a statistics request.
 747  *
 748  * This timer function is continually reset to execute within
 749  * REG_RECALIB_PERIOD seconds since the last STATISTICS_NOTIFICATION
 750  * was received.  We need to ensure we receive the statistics in order
 751  * to update the temperature used for calibrating the TXPOWER.
 752  */
 753 static void iwl_bg_statistics_periodic(unsigned long data)
 754 {
 755         struct iwl_priv *priv = (struct iwl_priv *)data;
 756
 757         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 758                 return;
 759
 760         /* dont send host command if rf-kill is on */
 761         if (!iwl_is_ready_rf(priv))
 762                 return;
 763
 764         iwl_send_statistics_request(priv, CMD_ASYNC);
 765 }
 766
 767 static void iwl_rx_beacon_notif(struct iwl_priv *priv,
 768                                 struct iwl_rx_mem_buffer *rxb)
 769 {
 770 #ifdef CONFIG_IWLWIFI_DEBUG
 771         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
 772         struct iwl4965_beacon_notif *beacon =
 773                 (struct iwl4965_beacon_notif *)pkt->u.raw;
 774         u8 rate = iwl_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
 775
 776         IWL_DEBUG_RX(priv, "beacon status %x retries %d iss %d "
 777                 "tsf %d %d rate %d\n",
 778                 le32_to_cpu(beacon->beacon_notify_hdr.u.status) & TX_STATUS_MSK,
 779                 beacon->beacon_notify_hdr.failure_frame,
 780                 le32_to_cpu(beacon->ibss_mgr_status),
 781                 le32_to_cpu(beacon->high_tsf),
 782                 le32_to_cpu(beacon->low_tsf), rate);
 783 #endif
 784
 785         if ((priv->iw_mode == NL80211_IFTYPE_AP) &&
 786             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
 787                 queue_work(priv->workqueue, &priv->beacon_update);
 788 }
 789
 790 /* Handle notification from uCode that card's power state is changing
 791  * due to software, hardware, or critical temperature RFKILL */
 792 static void iwl_rx_card_state_notif(struct iwl_priv *priv,
 793                                     struct iwl_rx_mem_buffer *rxb)
 794 {
 795         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
 796         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
 797         unsigned long status = priv->status;
 798
 799         IWL_DEBUG_RF_KILL(priv, "Card state received: HW:%s SW:%s\n",
 800                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
 801                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
 802
 803         if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED |
 804                      RF_CARD_DISABLED)) {
 805
 806                 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
 807                             CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
 808
 809                 if (!iwl_grab_nic_access(priv)) {
 810                         iwl_write_direct32(
 811                                 priv, HBUS_TARG_MBX_C,
 812                                 HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
 813
 814                         iwl_release_nic_access(priv);
 815                 }
 816
 817                 if (!(flags & RXON_CARD_DISABLED)) {
 818                         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
 819                                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
 820                         if (!iwl_grab_nic_access(priv)) {
 821                                 iwl_write_direct32(
 822                                         priv, HBUS_TARG_MBX_C,
 823                                         HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
 824
 825                                 iwl_release_nic_access(priv);
 826                         }
 827                 }
 828
 829                 if (flags & RF_CARD_DISABLED) {
 830                         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
 831                                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
 832                         iwl_read32(priv, CSR_UCODE_DRV_GP1);
 833                         if (!iwl_grab_nic_access(priv))
 834                                 iwl_release_nic_access(priv);
 835                 }
 836         }
 837
 838         if (flags & HW_CARD_DISABLED)
 839                 set_bit(STATUS_RF_KILL_HW, &priv->status);
 840         else
 841                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
 842
 843
 844         if (flags & SW_CARD_DISABLED)
 845                 set_bit(STATUS_RF_KILL_SW, &priv->status);
 846         else
 847                 clear_bit(STATUS_RF_KILL_SW, &priv->status);
 848
 849         if (!(flags & RXON_CARD_DISABLED))
 850                 iwl_scan_cancel(priv);
 851
 852         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
 853              test_bit(STATUS_RF_KILL_HW, &priv->status)) ||
 854             (test_bit(STATUS_RF_KILL_SW, &status) !=
 855              test_bit(STATUS_RF_KILL_SW, &priv->status)))
 856                 queue_work(priv->workqueue, &priv->rf_kill);
 857         else
 858                 wake_up_interruptible(&priv->wait_command_queue);
 859 }
 860
 861 int iwl_set_pwr_src(struct iwl_priv *priv, enum iwl_pwr_src src)
 862 {
 863         int ret;
 864         unsigned long flags;
 865
 866         spin_lock_irqsave(&priv->lock, flags);
 867         ret = iwl_grab_nic_access(priv);
 868         if (ret)
 869                 goto err;
 870
 871         if (src == IWL_PWR_SRC_VAUX) {
 872                 if (pci_pme_capable(priv->pci_dev, PCI_D3cold))
 873                         iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
 874                                                APMG_PS_CTRL_VAL_PWR_SRC_VAUX,
 875                                                ~APMG_PS_CTRL_MSK_PWR_SRC);
 876         } else {
 877                 iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
 878                                        APMG_PS_CTRL_VAL_PWR_SRC_VMAIN,
 879                                        ~APMG_PS_CTRL_MSK_PWR_SRC);
 880         }
 881
 882         iwl_release_nic_access(priv);
 883 err:
 884         spin_unlock_irqrestore(&priv->lock, flags);
 885         return ret;
 886 }
 887
 888 /**
 889  * iwl_setup_rx_handlers - Initialize Rx handler callbacks
 890  *
 891  * Setup the RX handlers for each of the reply types sent from the uCode
 892  * to the host.
 893  *
 894  * This function chains into the hardware specific files for them to setup
 895  * any hardware specific handlers as well.
 896  */
 897 static void iwl_setup_rx_handlers(struct iwl_priv *priv)
 898 {
 899         priv->rx_handlers[REPLY_ALIVE] = iwl_rx_reply_alive;
 900         priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error;
 901         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
 902         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif;
 903         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
 904             iwl_rx_pm_debug_statistics_notif;
 905         priv->rx_handlers[BEACON_NOTIFICATION] = iwl_rx_beacon_notif;
 906
 907         /*
 908          * The same handler is used for both the REPLY to a discrete
 909          * statistics request from the host as well as for the periodic
 910          * statistics notifications (after received beacons) from the uCode.
 911          */
 912         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl_rx_statistics;
 913         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl_rx_statistics;
 914
 915         iwl_setup_spectrum_handlers(priv);
 916         iwl_setup_rx_scan_handlers(priv);
 917
 918         /* status change handler */
 919         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl_rx_card_state_notif;
 920
 921         priv->rx_handlers[MISSED_BEACONS_NOTIFICATION] =
 922             iwl_rx_missed_beacon_notif;
 923         /* Rx handlers */
 924         priv->rx_handlers[REPLY_RX_PHY_CMD] = iwl_rx_reply_rx_phy;
 925         priv->rx_handlers[REPLY_RX_MPDU_CMD] = iwl_rx_reply_rx;
 926         /* block ack */
 927         priv->rx_handlers[REPLY_COMPRESSED_BA] = iwl_rx_reply_compressed_ba;
 928         /* Set up hardware specific Rx handlers */
 929         priv->cfg->ops->lib->rx_handler_setup(priv);
 930 }
 931
 932 /**
 933  * iwl_rx_handle - Main entry function for receiving responses from uCode
 934  *
 935  * Uses the priv->rx_handlers callback function array to invoke
 936  * the appropriate handlers, including command responses,
 937  * frame-received notifications, and other notifications.
 938  */
 939 void iwl_rx_handle(struct iwl_priv *priv)
 940 {
 941         struct iwl_rx_mem_buffer *rxb;
 942         struct iwl_rx_packet *pkt;
 943         struct iwl_rx_queue *rxq = &priv->rxq;
 944         u32 r, i;
 945         int reclaim;
 946         unsigned long flags;
 947         u8 fill_rx = 0;
 948         u32 count = 8;
 949
 950         /* uCode's read index (stored in shared DRAM) indicates the last Rx
 951          * buffer that the driver may process (last buffer filled by ucode). */
 952         r = le16_to_cpu(rxq->rb_stts->closed_rb_num) &  0x0FFF;
 953         i = rxq->read;
 954
 955         /* Rx interrupt, but nothing sent from uCode */
 956         if (i == r)
 957                 IWL_DEBUG_RX(priv, "r = %d, i = %d\n", r, i);
 958
 959         if (iwl_rx_queue_space(rxq) > (RX_QUEUE_SIZE / 2))
 960                 fill_rx = 1;
 961
 962         while (i != r) {
 963                 rxb = rxq->queue[i];
 964
 965                 /* If an RXB doesn't have a Rx queue slot associated with it,
 966                  * then a bug has been introduced in the queue refilling
 967                  * routines -- catch it here */
 968                 BUG_ON(rxb == NULL);
 969
 970                 rxq->queue[i] = NULL;
 971
 972                 pci_unmap_single(priv->pci_dev, rxb->real_dma_addr,
 973                                  priv->hw_params.rx_buf_size + 256,
 974                                  PCI_DMA_FROMDEVICE);
 975                 pkt = (struct iwl_rx_packet *)rxb->skb->data;
 976
 977                 /* Reclaim a command buffer only if this packet is a response
 978                  *   to a (driver-originated) command.
 979                  * If the packet (e.g. Rx frame) originated from uCode,
 980                  *   there is no command buffer to reclaim.
 981                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
 982                  *   but apparently a few don't get set; catch them here. */
 983                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
 984                         (pkt->hdr.cmd != REPLY_RX_PHY_CMD) &&
 985                         (pkt->hdr.cmd != REPLY_RX) &&
 986                         (pkt->hdr.cmd != REPLY_RX_MPDU_CMD) &&
 987                         (pkt->hdr.cmd != REPLY_COMPRESSED_BA) &&
 988                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
 989                         (pkt->hdr.cmd != REPLY_TX);
 990
 991                 /* Based on type of command response or notification,
 992                  *   handle those that need handling via function in
 993                  *   rx_handlers table.  See iwl_setup_rx_handlers() */
 994                 if (priv->rx_handlers[pkt->hdr.cmd]) {
 995                         IWL_DEBUG_RX(priv, "r = %d, i = %d, %s, 0x%02x\n", r,
 996                                 i, get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
 997                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
 998                 } else {
 999                         /* No handling needed */
1000                         IWL_DEBUG_RX(priv,
1001                                 "r %d i %d No handler needed for %s, 0x%02x\n",
1002                                 r, i, get_cmd_string(pkt->hdr.cmd),
1003                                 pkt->hdr.cmd);
1004                 }
1005
1006                 if (reclaim) {
1007                         /* Invoke any callbacks, transfer the skb to caller, and
1008                          * fire off the (possibly) blocking iwl_send_cmd()
1009                          * as we reclaim the driver command queue */
1010                         if (rxb && rxb->skb)
1011                                 iwl_tx_cmd_complete(priv, rxb);
1012                         else
1013                                 IWL_WARN(priv, "Claim null rxb?\n");
1014                 }
1015
1016                 /* For now we just don't re-use anything.  We can tweak this
1017                  * later to try and re-use notification packets and SKBs that
1018                  * fail to Rx correctly */
1019                 if (rxb->skb != NULL) {
1020                         priv->alloc_rxb_skb--;
1021                         dev_kfree_skb_any(rxb->skb);
1022                         rxb->skb = NULL;
1023                 }
1024
1025                 spin_lock_irqsave(&rxq->lock, flags);
1026                 list_add_tail(&rxb->list, &priv->rxq.rx_used);
1027                 spin_unlock_irqrestore(&rxq->lock, flags);
1028                 i = (i + 1) & RX_QUEUE_MASK;
1029                 /* If there are a lot of unused frames,
1030                  * restock the Rx queue so ucode wont assert. */
1031                 if (fill_rx) {
1032                         count++;
1033                         if (count >= 8) {
1034                                 priv->rxq.read = i;
1035                                 iwl_rx_queue_restock(priv);
1036                                 count = 0;
1037                         }
1038                 }
1039         }
1040
1041         /* Backtrack one entry */
1042         priv->rxq.read = i;
1043         iwl_rx_queue_restock(priv);
1044 }
1045
1046 /* call this function to flush any scheduled tasklet */
1047 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
1048 {
1049         /* wait to make sure we flush pending tasklet*/
1050         synchronize_irq(priv->pci_dev->irq);
1051         tasklet_kill(&priv->irq_tasklet);
1052 }
1053
1054 static void iwl_error_recovery(struct iwl_priv *priv)
1055 {
1056         unsigned long flags;
1057
1058         memcpy(&priv->staging_rxon, &priv->recovery_rxon,
1059                sizeof(priv->staging_rxon));
1060         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1061         iwl_commit_rxon(priv);
1062
1063         iwl_rxon_add_station(priv, priv->bssid, 1);
1064
1065         spin_lock_irqsave(&priv->lock, flags);
1066         priv->assoc_id = le16_to_cpu(priv->staging_rxon.assoc_id);
1067         priv->error_recovering = 0;
1068         spin_unlock_irqrestore(&priv->lock, flags);
1069 }
1070
1071 static void iwl_irq_tasklet(struct iwl_priv *priv)
1072 {
1073         u32 inta, handled = 0;
1074         u32 inta_fh;
1075         unsigned long flags;
1076 #ifdef CONFIG_IWLWIFI_DEBUG
1077         u32 inta_mask;
1078 #endif
1079
1080         spin_lock_irqsave(&priv->lock, flags);
1081
1082         /* Ack/clear/reset pending uCode interrupts.
1083          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
1084          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
1085         inta = iwl_read32(priv, CSR_INT);
1086         iwl_write32(priv, CSR_INT, inta);
1087
1088         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
1089          * Any new interrupts that happen after this, either while we're
1090          * in this tasklet, or later, will show up in next ISR/tasklet. */
1091         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1092         iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
1093
1094 #ifdef CONFIG_IWLWIFI_DEBUG
1095         if (priv->debug_level & IWL_DL_ISR) {
1096                 /* just for debug */
1097                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1098                 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1099                               inta, inta_mask, inta_fh);
1100         }
1101 #endif
1102
1103         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
1104          * atomic, make sure that inta covers all the interrupts that
1105          * we've discovered, even if FH interrupt came in just after
1106          * reading CSR_INT. */
1107         if (inta_fh & CSR49_FH_INT_RX_MASK)
1108                 inta |= CSR_INT_BIT_FH_RX;
1109         if (inta_fh & CSR49_FH_INT_TX_MASK)
1110                 inta |= CSR_INT_BIT_FH_TX;
1111
1112         /* Now service all interrupt bits discovered above. */
1113         if (inta & CSR_INT_BIT_HW_ERR) {
1114                 IWL_ERR(priv, "Microcode HW error detected.  Restarting.\n");
1115
1116                 /* Tell the device to stop sending interrupts */
1117                 iwl_disable_interrupts(priv);
1118
1119                 iwl_irq_handle_error(priv);
1120
1121                 handled |= CSR_INT_BIT_HW_ERR;
1122
1123                 spin_unlock_irqrestore(&priv->lock, flags);
1124
1125                 return;
1126         }
1127
1128 #ifdef CONFIG_IWLWIFI_DEBUG
1129         if (priv->debug_level & (IWL_DL_ISR)) {
1130                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1131                 if (inta & CSR_INT_BIT_SCD)
1132                         IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
1133                                       "the frame/frames.\n");
1134
1135                 /* Alive notification via Rx interrupt will do the real work */
1136                 if (inta & CSR_INT_BIT_ALIVE)
1137                         IWL_DEBUG_ISR(priv, "Alive interrupt\n");
1138         }
1139 #endif
1140         /* Safely ignore these bits for debug checks below */
1141         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1142
1143         /* HW RF KILL switch toggled */
1144         if (inta & CSR_INT_BIT_RF_KILL) {
1145                 int hw_rf_kill = 0;
1146                 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
1147                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
1148                         hw_rf_kill = 1;
1149
1150                 IWL_DEBUG_RF_KILL(priv, "RF_KILL bit toggled to %s.\n",
1151                                 hw_rf_kill ? "disable radio" : "enable radio");
1152
1153                 /* driver only loads ucode once setting the interface up.
1154                  * the driver allows loading the ucode even if the radio
1155                  * is killed. Hence update the killswitch state here. The
1156                  * rfkill handler will care about restarting if needed.
1157                  */
1158                 if (!test_bit(STATUS_ALIVE, &priv->status)) {
1159                         if (hw_rf_kill)
1160                                 set_bit(STATUS_RF_KILL_HW, &priv->status);
1161                         else
1162                                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
1163                         queue_work(priv->workqueue, &priv->rf_kill);
1164                 }
1165
1166                 handled |= CSR_INT_BIT_RF_KILL;
1167         }
1168
1169         /* Chip got too hot and stopped itself */
1170         if (inta & CSR_INT_BIT_CT_KILL) {
1171                 IWL_ERR(priv, "Microcode CT kill error detected.\n");
1172                 handled |= CSR_INT_BIT_CT_KILL;
1173         }
1174
1175         /* Error detected by uCode */
1176         if (inta & CSR_INT_BIT_SW_ERR) {
1177                 IWL_ERR(priv, "Microcode SW error detected. "
1178                         " Restarting 0x%X.\n", inta);
1179                 iwl_irq_handle_error(priv);
1180                 handled |= CSR_INT_BIT_SW_ERR;
1181         }
1182
1183         /* uCode wakes up after power-down sleep */
1184         if (inta & CSR_INT_BIT_WAKEUP) {
1185                 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
1186                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
1187                 iwl_txq_update_write_ptr(priv, &priv->txq[0]);
1188                 iwl_txq_update_write_ptr(priv, &priv->txq[1]);
1189                 iwl_txq_update_write_ptr(priv, &priv->txq[2]);
1190                 iwl_txq_update_write_ptr(priv, &priv->txq[3]);
1191                 iwl_txq_update_write_ptr(priv, &priv->txq[4]);
1192                 iwl_txq_update_write_ptr(priv, &priv->txq[5]);
1193
1194                 handled |= CSR_INT_BIT_WAKEUP;
1195         }
1196
1197         /* All uCode command responses, including Tx command responses,
1198          * Rx "responses" (frame-received notification), and other
1199          * notifications from uCode come through here*/
1200         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1201                 iwl_rx_handle(priv);
1202                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1203         }
1204
1205         if (inta & CSR_INT_BIT_FH_TX) {
1206                 IWL_DEBUG_ISR(priv, "Tx interrupt\n");
1207                 handled |= CSR_INT_BIT_FH_TX;
1208                 /* FH finished to write, send event */
1209                 priv->ucode_write_complete = 1;
1210                 wake_up_interruptible(&priv->wait_command_queue);
1211         }
1212
1213         if (inta & ~handled)
1214                 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
1215
1216         if (inta & ~CSR_INI_SET_MASK) {
1217                 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
1218                          inta & ~CSR_INI_SET_MASK);
1219                 IWL_WARN(priv, "   with FH_INT = 0x%08x\n", inta_fh);
1220         }
1221
1222         /* Re-enable all interrupts */
1223         /* only Re-enable if diabled by irq */
1224         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1225                 iwl_enable_interrupts(priv);
1226
1227 #ifdef CONFIG_IWLWIFI_DEBUG
1228         if (priv->debug_level & (IWL_DL_ISR)) {
1229                 inta = iwl_read32(priv, CSR_INT);
1230                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1231                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1232                 IWL_DEBUG_ISR(priv, "End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
1233                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
1234         }
1235 #endif
1236         spin_unlock_irqrestore(&priv->lock, flags);
1237 }
1238
1239 /******************************************************************************
1240  *
1241  * uCode download functions
1242  *
1243  ******************************************************************************/
1244
1245 static void iwl_dealloc_ucode_pci(struct iwl_priv *priv)
1246 {
1247         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
1248         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
1249         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1250         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
1251         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1252         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
1253 }
1254
1255 static void iwl_nic_start(struct iwl_priv *priv)
1256 {
1257         /* Remove all resets to allow NIC to operate */
1258         iwl_write32(priv, CSR_RESET, 0);
1259 }
1260
1261
1262 /**
1263  * iwl_read_ucode - Read uCode images from disk file.
1264  *
1265  * Copy into buffers for card to fetch via bus-mastering
1266  */
1267 static int iwl_read_ucode(struct iwl_priv *priv)
1268 {
1269         struct iwl_ucode *ucode;
1270         int ret = -EINVAL, index;
1271         const struct firmware *ucode_raw;
1272         const char *name_pre = priv->cfg->fw_name_pre;
1273         const unsigned int api_max = priv->cfg->ucode_api_max;
1274         const unsigned int api_min = priv->cfg->ucode_api_min;
1275         char buf[25];
1276         u8 *src;
1277         size_t len;
1278         u32 api_ver, inst_size, data_size, init_size, init_data_size, boot_size;
1279
1280         /* Ask kernel firmware_class module to get the boot firmware off disk.
1281          * request_firmware() is synchronous, file is in memory on return. */
1282         for (index = api_max; index >= api_min; index--) {
1283                 sprintf(buf, "%s%d%s", name_pre, index, ".ucode");
1284                 ret = request_firmware(&ucode_raw, buf, &priv->pci_dev->dev);
1285                 if (ret < 0) {
1286                         IWL_ERR(priv, "%s firmware file req failed: %d\n",
1287                                   buf, ret);
1288                         if (ret == -ENOENT)
1289                                 continue;
1290                         else
1291                                 goto error;
1292                 } else {
1293                         if (index < api_max)
1294                                 IWL_ERR(priv, "Loaded firmware %s, "
1295                                         "which is deprecated. "
1296                                         "Please use API v%u instead.\n",
1297                                           buf, api_max);
1298
1299                         IWL_DEBUG_INFO(priv, "Got firmware '%s' file (%zd bytes) from disk\n",
1300                                        buf, ucode_raw->size);
1301                         break;
1302                 }
1303         }
1304
1305         if (ret < 0)
1306                 goto error;
1307
1308         /* Make sure that we got at least our header! */
1309         if (ucode_raw->size < sizeof(*ucode)) {
1310                 IWL_ERR(priv, "File size way too small!\n");
1311                 ret = -EINVAL;
1312                 goto err_release;
1313         }
1314
1315         /* Data from ucode file:  header followed by uCode images */
1316         ucode = (void *)ucode_raw->data;
1317
1318         priv->ucode_ver = le32_to_cpu(ucode->ver);
1319         api_ver = IWL_UCODE_API(priv->ucode_ver);
1320         inst_size = le32_to_cpu(ucode->inst_size);
1321         data_size = le32_to_cpu(ucode->data_size);
1322         init_size = le32_to_cpu(ucode->init_size);
1323         init_data_size = le32_to_cpu(ucode->init_data_size);
1324         boot_size = le32_to_cpu(ucode->boot_size);
1325
1326         /* api_ver should match the api version forming part of the
1327          * firmware filename ... but we don't check for that and only rely
1328          * on the API version read from firmware header from here on forward */
1329
1330         if (api_ver < api_min || api_ver > api_max) {
1331                 IWL_ERR(priv, "Driver unable to support your firmware API. "
1332                           "Driver supports v%u, firmware is v%u.\n",
1333                           api_max, api_ver);
1334                 priv->ucode_ver = 0;
1335                 ret = -EINVAL;
1336                 goto err_release;
1337         }
1338         if (api_ver != api_max)
1339                 IWL_ERR(priv, "Firmware has old API version. Expected v%u, "
1340                           "got v%u. New firmware can be obtained "
1341                           "from http://www.intellinuxwireless.org.\n",
1342                           api_max, api_ver);
1343
1344         IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u\n",
1345                IWL_UCODE_MAJOR(priv->ucode_ver),
1346                IWL_UCODE_MINOR(priv->ucode_ver),
1347                IWL_UCODE_API(priv->ucode_ver),
1348                IWL_UCODE_SERIAL(priv->ucode_ver));
1349
1350         IWL_DEBUG_INFO(priv, "f/w package hdr ucode version raw = 0x%x\n",
1351                        priv->ucode_ver);
1352         IWL_DEBUG_INFO(priv, "f/w package hdr runtime inst size = %u\n",
1353                        inst_size);
1354         IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %u\n",
1355                        data_size);
1356         IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %u\n",
1357                        init_size);
1358         IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %u\n",
1359                        init_data_size);
1360         IWL_DEBUG_INFO(priv, "f/w package hdr boot inst size = %u\n",
1361                        boot_size);
1362
1363         /* Verify size of file vs. image size info in file's header */
1364         if (ucode_raw->size < sizeof(*ucode) +
1365                 inst_size + data_size + init_size +
1366                 init_data_size + boot_size) {
1367
1368                 IWL_DEBUG_INFO(priv, "uCode file size %d too small\n",
1369                                (int)ucode_raw->size);
1370                 ret = -EINVAL;
1371                 goto err_release;
1372         }
1373
1374         /* Verify that uCode images will fit in card's SRAM */
1375         if (inst_size > priv->hw_params.max_inst_size) {
1376                 IWL_DEBUG_INFO(priv, "uCode instr len %d too large to fit in\n",
1377                                inst_size);
1378                 ret = -EINVAL;
1379                 goto err_release;
1380         }
1381
1382         if (data_size > priv->hw_params.max_data_size) {
1383                 IWL_DEBUG_INFO(priv, "uCode data len %d too large to fit in\n",
1384                                 data_size);
1385                 ret = -EINVAL;
1386                 goto err_release;
1387         }
1388         if (init_size > priv->hw_params.max_inst_size) {
1389                 IWL_INFO(priv, "uCode init instr len %d too large to fit in\n",
1390                         init_size);
1391                 ret = -EINVAL;
1392                 goto err_release;
1393         }
1394         if (init_data_size > priv->hw_params.max_data_size) {
1395                 IWL_INFO(priv, "uCode init data len %d too large to fit in\n",
1396                       init_data_size);
1397                 ret = -EINVAL;
1398                 goto err_release;
1399         }
1400         if (boot_size > priv->hw_params.max_bsm_size) {
1401                 IWL_INFO(priv, "uCode boot instr len %d too large to fit in\n",
1402                         boot_size);
1403                 ret = -EINVAL;
1404                 goto err_release;
1405         }
1406
1407         /* Allocate ucode buffers for card's bus-master loading ... */
1408
1409         /* Runtime instructions and 2 copies of data:
1410          * 1) unmodified from disk
1411          * 2) backup cache for save/restore during power-downs */
1412         priv->ucode_code.len = inst_size;
1413         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
1414
1415         priv->ucode_data.len = data_size;
1416         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
1417
1418         priv->ucode_data_backup.len = data_size;
1419         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1420
1421         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
1422             !priv->ucode_data_backup.v_addr)
1423                 goto err_pci_alloc;
1424
1425         /* Initialization instructions and data */
1426         if (init_size && init_data_size) {
1427                 priv->ucode_init.len = init_size;
1428                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
1429
1430                 priv->ucode_init_data.len = init_data_size;
1431                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1432
1433                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
1434                         goto err_pci_alloc;
1435         }
1436
1437         /* Bootstrap (instructions only, no data) */
1438         if (boot_size) {
1439                 priv->ucode_boot.len = boot_size;
1440                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
1441
1442                 if (!priv->ucode_boot.v_addr)
1443                         goto err_pci_alloc;
1444         }
1445
1446         /* Copy images into buffers for card's bus-master reads ... */
1447
1448         /* Runtime instructions (first block of data in file) */
1449         src = &ucode->data[0];
1450         len = priv->ucode_code.len;
1451         IWL_DEBUG_INFO(priv, "Copying (but not loading) uCode instr len %Zd\n", len);
1452         memcpy(priv->ucode_code.v_addr, src, len);
1453         IWL_DEBUG_INFO(priv, "uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
1454                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
1455
1456         /* Runtime data (2nd block)
1457          * NOTE:  Copy into backup buffer will be done in iwl_up()  */
1458         src = &ucode->data[inst_size];
1459         len = priv->ucode_data.len;
1460         IWL_DEBUG_INFO(priv, "Copying (but not loading) uCode data len %Zd\n", len);
1461         memcpy(priv->ucode_data.v_addr, src, len);
1462         memcpy(priv->ucode_data_backup.v_addr, src, len);
1463
1464         /* Initialization instructions (3rd block) */
1465         if (init_size) {
1466                 src = &ucode->data[inst_size + data_size];
1467                 len = priv->ucode_init.len;
1468                 IWL_DEBUG_INFO(priv, "Copying (but not loading) init instr len %Zd\n",
1469                                 len);
1470                 memcpy(priv->ucode_init.v_addr, src, len);
1471         }
1472
1473         /* Initialization data (4th block) */
1474         if (init_data_size) {
1475                 src = &ucode->data[inst_size + data_size + init_size];
1476                 len = priv->ucode_init_data.len;
1477                 IWL_DEBUG_INFO(priv, "Copying (but not loading) init data len %Zd\n",
1478                                len);
1479                 memcpy(priv->ucode_init_data.v_addr, src, len);
1480         }
1481
1482         /* Bootstrap instructions (5th block) */
1483         src = &ucode->data[inst_size + data_size + init_size + init_data_size];
1484         len = priv->ucode_boot.len;
1485         IWL_DEBUG_INFO(priv, "Copying (but not loading) boot instr len %Zd\n", len);
1486         memcpy(priv->ucode_boot.v_addr, src, len);
1487
1488         /* We have our copies now, allow OS release its copies */
1489         release_firmware(ucode_raw);
1490         return 0;
1491
1492  err_pci_alloc:
1493         IWL_ERR(priv, "failed to allocate pci memory\n");
1494         ret = -ENOMEM;
1495         iwl_dealloc_ucode_pci(priv);
1496
1497  err_release:
1498         release_firmware(ucode_raw);
1499
1500  error:
1501         return ret;
1502 }
1503
1504 /* temporary */
1505 static int iwl_mac_beacon_update(struct ieee80211_hw *hw,
1506                                  struct sk_buff *skb);
1507
1508 /**
1509  * iwl_alive_start - called after REPLY_ALIVE notification received
1510  *                   from protocol/runtime uCode (initialization uCode's
1511  *                   Alive gets handled by iwl_init_alive_start()).
1512  */
1513 static void iwl_alive_start(struct iwl_priv *priv)
1514 {
1515         int ret = 0;
1516
1517         IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
1518
1519         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
1520                 /* We had an error bringing up the hardware, so take it
1521                  * all the way back down so we can try again */
1522                 IWL_DEBUG_INFO(priv, "Alive failed.\n");
1523                 goto restart;
1524         }
1525
1526         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
1527          * This is a paranoid check, because we would not have gotten the
1528          * "runtime" alive if code weren't properly loaded.  */
1529         if (iwl_verify_ucode(priv)) {
1530                 /* Runtime instruction load was bad;
1531                  * take it all the way back down so we can try again */
1532                 IWL_DEBUG_INFO(priv, "Bad runtime uCode load.\n");
1533                 goto restart;
1534         }
1535
1536         iwl_clear_stations_table(priv);
1537         ret = priv->cfg->ops->lib->alive_notify(priv);
1538         if (ret) {
1539                 IWL_WARN(priv,
1540                         "Could not complete ALIVE transition [ntf]: %d\n", ret);
1541                 goto restart;
1542         }
1543
1544         /* After the ALIVE response, we can send host commands to the uCode */
1545         set_bit(STATUS_ALIVE, &priv->status);
1546
1547         if (iwl_is_rfkill(priv))
1548                 return;
1549
1550         ieee80211_wake_queues(priv->hw);
1551
1552         priv->active_rate = priv->rates_mask;
1553         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
1554
1555         if (iwl_is_associated(priv)) {
1556                 struct iwl_rxon_cmd *active_rxon =
1557                                 (struct iwl_rxon_cmd *)&priv->active_rxon;
1558                 /* apply any changes in staging */
1559                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
1560                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1561         } else {
1562                 /* Initialize our rx_config data */
1563                 iwl_connection_init_rx_config(priv, priv->iw_mode);
1564                 iwl_set_rxon_chain(priv);
1565                 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
1566         }
1567
1568         /* Configure Bluetooth device coexistence support */
1569         iwl_send_bt_config(priv);
1570
1571         iwl_reset_run_time_calib(priv);
1572
1573         /* Configure the adapter for unassociated operation */
1574         iwl_commit_rxon(priv);
1575
1576         /* At this point, the NIC is initialized and operational */
1577         iwl_rf_kill_ct_config(priv);
1578
1579         iwl_leds_register(priv);
1580
1581         IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
1582         set_bit(STATUS_READY, &priv->status);
1583         wake_up_interruptible(&priv->wait_command_queue);
1584
1585         if (priv->error_recovering)
1586                 iwl_error_recovery(priv);
1587
1588         iwl_power_update_mode(priv, 1);
1589
1590         /* reassociate for ADHOC mode */
1591         if (priv->vif && (priv->iw_mode == NL80211_IFTYPE_ADHOC)) {
1592                 struct sk_buff *beacon = ieee80211_beacon_get(priv->hw,
1593                                                                 priv->vif);
1594                 if (beacon)
1595                         iwl_mac_beacon_update(priv->hw, beacon);
1596         }
1597
1598
1599         if (test_and_clear_bit(STATUS_MODE_PENDING, &priv->status))
1600                 iwl_set_mode(priv, priv->iw_mode);
1601
1602         return;
1603
1604  restart:
1605         queue_work(priv->workqueue, &priv->restart);
1606 }
1607
1608 static void iwl_cancel_deferred_work(struct iwl_priv *priv);
1609
1610 static void __iwl_down(struct iwl_priv *priv)
1611 {
1612         unsigned long flags;
1613         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
1614
1615         IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
1616
1617         if (!exit_pending)
1618                 set_bit(STATUS_EXIT_PENDING, &priv->status);
1619
1620         iwl_leds_unregister(priv);
1621
1622         iwl_clear_stations_table(priv);
1623
1624         /* Unblock any waiting calls */
1625         wake_up_interruptible_all(&priv->wait_command_queue);
1626
1627         /* Wipe out the EXIT_PENDING status bit if we are not actually
1628          * exiting the module */
1629         if (!exit_pending)
1630                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
1631
1632         /* stop and reset the on-board processor */
1633         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
1634
1635         /* tell the device to stop sending interrupts */
1636         spin_lock_irqsave(&priv->lock, flags);
1637         iwl_disable_interrupts(priv);
1638         spin_unlock_irqrestore(&priv->lock, flags);
1639         iwl_synchronize_irq(priv);
1640
1641         if (priv->mac80211_registered)
1642                 ieee80211_stop_queues(priv->hw);
1643
1644         /* If we have not previously called iwl_init() then
1645          * clear all bits but the RF Kill and SUSPEND bits and return */
1646         if (!iwl_is_init(priv)) {
1647                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
1648                                         STATUS_RF_KILL_HW |
1649                                test_bit(STATUS_RF_KILL_SW, &priv->status) <<
1650                                         STATUS_RF_KILL_SW |
1651                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
1652                                         STATUS_GEO_CONFIGURED |
1653                                test_bit(STATUS_IN_SUSPEND, &priv->status) <<
1654                                         STATUS_IN_SUSPEND |
1655                                test_bit(STATUS_EXIT_PENDING, &priv->status) <<
1656                                         STATUS_EXIT_PENDING;
1657                 goto exit;
1658         }
1659
1660         /* ...otherwise clear out all the status bits but the RF Kill and
1661          * SUSPEND bits and continue taking the NIC down. */
1662         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
1663                                 STATUS_RF_KILL_HW |
1664                         test_bit(STATUS_RF_KILL_SW, &priv->status) <<
1665                                 STATUS_RF_KILL_SW |
1666                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
1667                                 STATUS_GEO_CONFIGURED |
1668                         test_bit(STATUS_IN_SUSPEND, &priv->status) <<
1669                                 STATUS_IN_SUSPEND |
1670                         test_bit(STATUS_FW_ERROR, &priv->status) <<
1671                                 STATUS_FW_ERROR |
1672                        test_bit(STATUS_EXIT_PENDING, &priv->status) <<
1673                                 STATUS_EXIT_PENDING;
1674
1675         spin_lock_irqsave(&priv->lock, flags);
1676         iwl_clear_bit(priv, CSR_GP_CNTRL,
1677                          CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
1678         spin_unlock_irqrestore(&priv->lock, flags);
1679
1680         iwl_txq_ctx_stop(priv);
1681         iwl_rxq_stop(priv);
1682
1683         spin_lock_irqsave(&priv->lock, flags);
1684         if (!iwl_grab_nic_access(priv)) {
1685                 iwl_write_prph(priv, APMG_CLK_DIS_REG,
1686                                          APMG_CLK_VAL_DMA_CLK_RQT);
1687                 iwl_release_nic_access(priv);
1688         }
1689         spin_unlock_irqrestore(&priv->lock, flags);
1690
1691         udelay(5);
1692
1693         /* FIXME: apm_ops.suspend(priv) */
1694         if (exit_pending || test_bit(STATUS_IN_SUSPEND, &priv->status))
1695                 priv->cfg->ops->lib->apm_ops.stop(priv);
1696         else
1697                 priv->cfg->ops->lib->apm_ops.reset(priv);
1698  exit:
1699         memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
1700
1701         if (priv->ibss_beacon)
1702                 dev_kfree_skb(priv->ibss_beacon);
1703         priv->ibss_beacon = NULL;
1704
1705         /* clear out any free frames */
1706         iwl_clear_free_frames(priv);
1707 }
1708
1709 static void iwl_down(struct iwl_priv *priv)
1710 {
1711         mutex_lock(&priv->mutex);
1712         __iwl_down(priv);
1713         mutex_unlock(&priv->mutex);
1714
1715         iwl_cancel_deferred_work(priv);
1716 }
1717
1718 #define MAX_HW_RESTARTS 5
1719
1720 static int __iwl_up(struct iwl_priv *priv)
1721 {
1722         int i;
1723         int ret;
1724
1725         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1726                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
1727                 return -EIO;
1728         }
1729
1730         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
1731                 IWL_ERR(priv, "ucode not available for device bringup\n");
1732                 return -EIO;
1733         }
1734
1735         /* If platform's RF_KILL switch is NOT set to KILL */
1736         if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
1737                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
1738         else
1739                 set_bit(STATUS_RF_KILL_HW, &priv->status);
1740
1741         if (iwl_is_rfkill(priv)) {
1742                 iwl_enable_interrupts(priv);
1743                 IWL_WARN(priv, "Radio disabled by %s RF Kill switch\n",
1744                     test_bit(STATUS_RF_KILL_HW, &priv->status) ? "HW" : "SW");
1745                 return 0;
1746         }
1747
1748         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
1749
1750         ret = iwl_hw_nic_init(priv);
1751         if (ret) {
1752                 IWL_ERR(priv, "Unable to init nic\n");
1753                 return ret;
1754         }
1755
1756         /* make sure rfkill handshake bits are cleared */
1757         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
1758         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
1759                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
1760
1761         /* clear (again), then enable host interrupts */
1762         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
1763         iwl_enable_interrupts(priv);
1764
1765         /* really make sure rfkill handshake bits are cleared */
1766         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
1767         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
1768
1769         /* Copy original ucode data image from disk into backup cache.
1770          * This will be used to initialize the on-board processor's
1771          * data SRAM for a clean start when the runtime program first loads. */
1772         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
1773                priv->ucode_data.len);
1774
1775         for (i = 0; i < MAX_HW_RESTARTS; i++) {
1776
1777                 iwl_clear_stations_table(priv);
1778
1779                 /* load bootstrap state machine,
1780                  * load bootstrap program into processor's memory,
1781                  * prepare to load the "initialize" uCode */
1782                 ret = priv->cfg->ops->lib->load_ucode(priv);
1783
1784                 if (ret) {
1785                         IWL_ERR(priv, "Unable to set up bootstrap uCode: %d\n",
1786                                 ret);
1787                         continue;
1788                 }
1789
1790                 /* Clear out the uCode error bit if it is set */
1791                 clear_bit(STATUS_FW_ERROR, &priv->status);
1792
1793                 /* start card; "initialize" will load runtime ucode */
1794                 iwl_nic_start(priv);
1795
1796                 IWL_DEBUG_INFO(priv, DRV_NAME " is coming up\n");
1797
1798                 return 0;
1799         }
1800
1801         set_bit(STATUS_EXIT_PENDING, &priv->status);
1802         __iwl_down(priv);
1803         clear_bit(STATUS_EXIT_PENDING, &priv->status);
1804
1805         /* tried to restart and config the device for as long as our
1806          * patience could withstand */
1807         IWL_ERR(priv, "Unable to initialize device after %d attempts.\n", i);
1808         return -EIO;
1809 }
1810
1811
1812 /*****************************************************************************
1813  *
1814  * Workqueue callbacks
1815  *
1816  *****************************************************************************/
1817
1818 static void iwl_bg_init_alive_start(struct work_struct *data)
1819 {
1820         struct iwl_priv *priv =
1821             container_of(data, struct iwl_priv, init_alive_start.work);
1822
1823         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1824                 return;
1825
1826         mutex_lock(&priv->mutex);
1827         priv->cfg->ops->lib->init_alive_start(priv);
1828         mutex_unlock(&priv->mutex);
1829 }
1830
1831 static void iwl_bg_alive_start(struct work_struct *data)
1832 {
1833         struct iwl_priv *priv =
1834             container_of(data, struct iwl_priv, alive_start.work);
1835
1836         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1837                 return;
1838
1839         mutex_lock(&priv->mutex);
1840         iwl_alive_start(priv);
1841         mutex_unlock(&priv->mutex);
1842 }
1843
1844 static void iwl_bg_run_time_calib_work(struct work_struct *work)
1845 {
1846         struct iwl_priv *priv = container_of(work, struct iwl_priv,
1847                         run_time_calib_work);
1848
1849         mutex_lock(&priv->mutex);
1850
1851         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
1852             test_bit(STATUS_SCANNING, &priv->status)) {
1853                 mutex_unlock(&priv->mutex);
1854                 return;
1855         }
1856
1857         if (priv->start_calib) {
1858                 iwl_chain_noise_calibration(priv, &priv->statistics);
1859
1860                 iwl_sensitivity_calibration(priv, &priv->statistics);
1861         }
1862
1863         mutex_unlock(&priv->mutex);
1864         return;
1865 }
1866
1867 static void iwl_bg_up(struct work_struct *data)
1868 {
1869         struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
1870
1871         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1872                 return;
1873
1874         mutex_lock(&priv->mutex);
1875         __iwl_up(priv);
1876         mutex_unlock(&priv->mutex);
1877         iwl_rfkill_set_hw_state(priv);
1878 }
1879
1880 static void iwl_bg_restart(struct work_struct *data)
1881 {
1882         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
1883
1884         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1885                 return;
1886
1887         iwl_down(priv);
1888         queue_work(priv->workqueue, &priv->up);
1889 }
1890
1891 static void iwl_bg_rx_replenish(struct work_struct *data)
1892 {
1893         struct iwl_priv *priv =
1894             container_of(data, struct iwl_priv, rx_replenish);
1895
1896         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1897                 return;
1898
1899         mutex_lock(&priv->mutex);
1900         iwl_rx_replenish(priv);
1901         mutex_unlock(&priv->mutex);
1902 }
1903
1904 #define IWL_DELAY_NEXT_SCAN (HZ*2)
1905
1906 static void iwl_post_associate(struct iwl_priv *priv)
1907 {
1908         struct ieee80211_conf *conf = NULL;
1909         int ret = 0;
1910         unsigned long flags;
1911
1912         if (priv->iw_mode == NL80211_IFTYPE_AP) {
1913                 IWL_ERR(priv, "%s Should not be called in AP mode\n", __func__);
1914                 return;
1915         }
1916
1917         IWL_DEBUG_ASSOC(priv, "Associated as %d to: %pM\n",
1918                         priv->assoc_id, priv->active_rxon.bssid_addr);
1919
1920
1921         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1922                 return;
1923
1924
1925         if (!priv->vif || !priv->is_open)
1926                 return;
1927
1928         iwl_power_cancel_timeout(priv);
1929         iwl_scan_cancel_timeout(priv, 200);
1930
1931         conf = ieee80211_get_hw_conf(priv->hw);
1932
1933         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1934         iwl_commit_rxon(priv);
1935
1936         iwl_setup_rxon_timing(priv);
1937         ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
1938                               sizeof(priv->rxon_timing), &priv->rxon_timing);
1939         if (ret)
1940                 IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
1941                             "Attempting to continue.\n");
1942
1943         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
1944
1945         iwl_set_rxon_ht(priv, &priv->current_ht_config);
1946
1947         iwl_set_rxon_chain(priv);
1948         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
1949
1950         IWL_DEBUG_ASSOC(priv, "assoc id %d beacon interval %d\n",
1951                         priv->assoc_id, priv->beacon_int);
1952
1953         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
1954                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
1955         else
1956                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
1957
1958         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
1959                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
1960                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
1961                 else
1962                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
1963
1964                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
1965                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
1966
1967         }
1968
1969         iwl_commit_rxon(priv);
1970
1971         switch (priv->iw_mode) {
1972         case NL80211_IFTYPE_STATION:
1973                 break;
1974
1975         case NL80211_IFTYPE_ADHOC:
1976
1977                 /* assume default assoc id */
1978                 priv->assoc_id = 1;
1979
1980                 iwl_rxon_add_station(priv, priv->bssid, 0);
1981                 iwl_send_beacon_cmd(priv);
1982
1983                 break;
1984
1985         default:
1986                 IWL_ERR(priv, "%s Should not be called in %d mode\n",
1987                           __func__, priv->iw_mode);
1988                 break;
1989         }
1990
1991         if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
1992                 priv->assoc_station_added = 1;
1993
1994         spin_lock_irqsave(&priv->lock, flags);
1995         iwl_activate_qos(priv, 0);
1996         spin_unlock_irqrestore(&priv->lock, flags);
1997
1998         /* the chain noise calibration will enabled PM upon completion
1999          * If chain noise has already been run, then we need to enable
2000          * power management here */
2001         if (priv->chain_noise_data.state == IWL_CHAIN_NOISE_DONE)
2002                 iwl_power_enable_management(priv);
2003
2004         /* Enable Rx differential gain and sensitivity calibrations */
2005         iwl_chain_noise_reset(priv);
2006         priv->start_calib = 1;
2007
2008 }
2009
2010 /*****************************************************************************
2011  *
2012  * mac80211 entry point functions
2013  *
2014  *****************************************************************************/
2015
2016 #define UCODE_READY_TIMEOUT     (4 * HZ)
2017
2018 static int iwl_mac_start(struct ieee80211_hw *hw)
2019 {
2020         struct iwl_priv *priv = hw->priv;
2021         int ret;
2022
2023         IWL_DEBUG_MAC80211(priv, "enter\n");
2024
2025         /* we should be verifying the device is ready to be opened */
2026         mutex_lock(&priv->mutex);
2027
2028         memset(&priv->staging_rxon, 0, sizeof(struct iwl_rxon_cmd));
2029         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
2030          * ucode filename and max sizes are card-specific. */
2031
2032         if (!priv->ucode_code.len) {
2033                 ret = iwl_read_ucode(priv);
2034                 if (ret) {
2035                         IWL_ERR(priv, "Could not read microcode: %d\n", ret);
2036                         mutex_unlock(&priv->mutex);
2037                         return ret;
2038                 }
2039         }
2040
2041         ret = __iwl_up(priv);
2042
2043         mutex_unlock(&priv->mutex);
2044
2045         iwl_rfkill_set_hw_state(priv);
2046
2047         if (ret)
2048                 return ret;
2049
2050         if (iwl_is_rfkill(priv))
2051                 goto out;
2052
2053         IWL_DEBUG_INFO(priv, "Start UP work done.\n");
2054
2055         if (test_bit(STATUS_IN_SUSPEND, &priv->status))
2056                 return 0;
2057
2058         /* Wait for START_ALIVE from Run Time ucode. Otherwise callbacks from
2059          * mac80211 will not be run successfully. */
2060         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
2061                         test_bit(STATUS_READY, &priv->status),
2062                         UCODE_READY_TIMEOUT);
2063         if (!ret) {
2064                 if (!test_bit(STATUS_READY, &priv->status)) {
2065                         IWL_ERR(priv, "START_ALIVE timeout after %dms.\n",
2066                                 jiffies_to_msecs(UCODE_READY_TIMEOUT));
2067                         return -ETIMEDOUT;
2068                 }
2069         }
2070
2071 out:
2072         priv->is_open = 1;
2073         IWL_DEBUG_MAC80211(priv, "leave\n");
2074         return 0;
2075 }
2076
2077 static void iwl_mac_stop(struct ieee80211_hw *hw)
2078 {
2079         struct iwl_priv *priv = hw->priv;
2080
2081         IWL_DEBUG_MAC80211(priv, "enter\n");
2082
2083         if (!priv->is_open) {
2084                 IWL_DEBUG_MAC80211(priv, "leave - skip\n");
2085                 return;
2086         }
2087
2088         priv->is_open = 0;
2089
2090         if (iwl_is_ready_rf(priv)) {
2091                 /* stop mac, cancel any scan request and clear
2092                  * RXON_FILTER_ASSOC_MSK BIT
2093                  */
2094                 mutex_lock(&priv->mutex);
2095                 iwl_scan_cancel_timeout(priv, 100);
2096                 mutex_unlock(&priv->mutex);
2097         }
2098
2099         iwl_down(priv);
2100
2101         flush_workqueue(priv->workqueue);
2102
2103         /* enable interrupts again in order to receive rfkill changes */
2104         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2105         iwl_enable_interrupts(priv);
2106
2107         IWL_DEBUG_MAC80211(priv, "leave\n");
2108 }
2109
2110 static int iwl_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
2111 {
2112         struct iwl_priv *priv = hw->priv;
2113
2114         IWL_DEBUG_MACDUMP(priv, "enter\n");
2115
2116         IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
2117                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
2118
2119         if (iwl_tx_skb(priv, skb))
2120                 dev_kfree_skb_any(skb);
2121
2122         IWL_DEBUG_MACDUMP(priv, "leave\n");
2123         return NETDEV_TX_OK;
2124 }
2125
2126 static int iwl_mac_add_interface(struct ieee80211_hw *hw,
2127                                  struct ieee80211_if_init_conf *conf)
2128 {
2129         struct iwl_priv *priv = hw->priv;
2130         unsigned long flags;
2131
2132         IWL_DEBUG_MAC80211(priv, "enter: type %d\n", conf->type);
2133
2134         if (priv->vif) {
2135                 IWL_DEBUG_MAC80211(priv, "leave - vif != NULL\n");
2136                 return -EOPNOTSUPP;
2137         }
2138
2139         spin_lock_irqsave(&priv->lock, flags);
2140         priv->vif = conf->vif;
2141         priv->iw_mode = conf->type;
2142
2143         spin_unlock_irqrestore(&priv->lock, flags);
2144
2145         mutex_lock(&priv->mutex);
2146
2147         if (conf->mac_addr) {
2148                 IWL_DEBUG_MAC80211(priv, "Set %pM\n", conf->mac_addr);
2149                 memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
2150         }
2151
2152         if (iwl_set_mode(priv, conf->type) == -EAGAIN)
2153                 /* we are not ready, will run again when ready */
2154                 set_bit(STATUS_MODE_PENDING, &priv->status);
2155
2156         mutex_unlock(&priv->mutex);
2157
2158         IWL_DEBUG_MAC80211(priv, "leave\n");
2159         return 0;
2160 }
2161
2162 /**
2163  * iwl_mac_config - mac80211 config callback
2164  *
2165  * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
2166  * be set inappropriately and the driver currently sets the hardware up to
2167  * use it whenever needed.
2168  */
2169 static int iwl_mac_config(struct ieee80211_hw *hw, u32 changed)
2170 {
2171         struct iwl_priv *priv = hw->priv;
2172         const struct iwl_channel_info *ch_info;
2173         struct ieee80211_conf *conf = &hw->conf;
2174         unsigned long flags = 0;
2175         int ret = 0;
2176         u16 ch;
2177         int scan_active = 0;
2178
2179         mutex_lock(&priv->mutex);
2180         IWL_DEBUG_MAC80211(priv, "enter to channel %d changed 0x%X\n",
2181                                         conf->channel->hw_value, changed);
2182
2183         if (unlikely(!priv->cfg->mod_params->disable_hw_scan &&
2184                         test_bit(STATUS_SCANNING, &priv->status))) {
2185                 scan_active = 1;
2186                 IWL_DEBUG_MAC80211(priv, "leave - scanning\n");
2187         }
2188
2189
2190         /* during scanning mac80211 will delay channel setting until
2191          * scan finish with changed = 0
2192          */
2193         if (!changed || (changed & IEEE80211_CONF_CHANGE_CHANNEL)) {
2194                 if (scan_active)
2195                         goto set_ch_out;
2196
2197                 ch = ieee80211_frequency_to_channel(conf->channel->center_freq);
2198                 ch_info = iwl_get_channel_info(priv, conf->channel->band, ch);
2199                 if (!is_channel_valid(ch_info)) {
2200                         IWL_DEBUG_MAC80211(priv, "leave - invalid channel\n");
2201                         ret = -EINVAL;
2202                         goto set_ch_out;
2203                 }
2204
2205                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC &&
2206                         !is_channel_ibss(ch_info)) {
2207                         IWL_ERR(priv, "channel %d in band %d not "
2208                                 "IBSS channel\n",
2209                                 conf->channel->hw_value, conf->channel->band);
2210                         ret = -EINVAL;
2211                         goto set_ch_out;
2212                 }
2213
2214                 priv->current_ht_config.is_ht = conf_is_ht(conf);
2215
2216                 spin_lock_irqsave(&priv->lock, flags);
2217
2218
2219                 /* if we are switching from ht to 2.4 clear flags
2220                  * from any ht related info since 2.4 does not
2221                  * support ht */
2222                 if ((le16_to_cpu(priv->staging_rxon.channel) != ch))
2223                         priv->staging_rxon.flags = 0;
2224
2225                 iwl_set_rxon_channel(priv, conf->channel);
2226
2227                 iwl_set_flags_for_band(priv, conf->channel->band);
2228                 spin_unlock_irqrestore(&priv->lock, flags);
2229  set_ch_out:
2230                 /* The list of supported rates and rate mask can be different
2231                  * for each band; since the band may have changed, reset
2232                  * the rate mask to what mac80211 lists */
2233                 iwl_set_rate(priv);
2234         }
2235
2236         if (changed & IEEE80211_CONF_CHANGE_PS) {
2237                 if (conf->flags & IEEE80211_CONF_PS)
2238                         ret = iwl_power_set_user_mode(priv, IWL_POWER_INDEX_3);
2239                 else
2240                         ret = iwl_power_set_user_mode(priv, IWL_POWER_MODE_CAM);
2241                 if (ret)
2242                         IWL_DEBUG_MAC80211(priv, "Error setting power level\n");
2243
2244         }
2245
2246         if (changed & IEEE80211_CONF_CHANGE_POWER) {
2247                 IWL_DEBUG_MAC80211(priv, "TX Power old=%d new=%d\n",
2248                         priv->tx_power_user_lmt, conf->power_level);
2249
2250                 iwl_set_tx_power(priv, conf->power_level, false);
2251         }
2252
2253         /* call to ensure that 4965 rx_chain is set properly in monitor mode */
2254         iwl_set_rxon_chain(priv);
2255
2256         if (changed & IEEE80211_CONF_CHANGE_RADIO_ENABLED) {
2257                 if (conf->radio_enabled &&
2258                         iwl_radio_kill_sw_enable_radio(priv)) {
2259                         IWL_DEBUG_MAC80211(priv, "leave - RF-KILL - "
2260                                                 "waiting for uCode\n");
2261                         goto out;
2262                 }
2263
2264                 if (!conf->radio_enabled)
2265                         iwl_radio_kill_sw_disable_radio(priv);
2266         }
2267
2268         if (!conf->radio_enabled) {
2269                 IWL_DEBUG_MAC80211(priv, "leave - radio disabled\n");
2270                 goto out;
2271         }
2272
2273         if (!iwl_is_ready(priv)) {
2274                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2275                 goto out;
2276         }
2277
2278         if (scan_active)
2279                 goto out;
2280
2281         if (memcmp(&priv->active_rxon,
2282                    &priv->staging_rxon, sizeof(priv->staging_rxon)))
2283                 iwl_commit_rxon(priv);
2284         else
2285                 IWL_DEBUG_INFO(priv, "No re-sending same RXON configuration.\n");
2286
2287
2288 out:
2289         IWL_DEBUG_MAC80211(priv, "leave\n");
2290         mutex_unlock(&priv->mutex);
2291         return ret;
2292 }
2293
2294 static void iwl_config_ap(struct iwl_priv *priv)
2295 {
2296         int ret = 0;
2297         unsigned long flags;
2298
2299         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2300                 return;
2301
2302         /* The following should be done only at AP bring up */
2303         if (!iwl_is_associated(priv)) {
2304
2305                 /* RXON - unassoc (to set timing command) */
2306                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2307                 iwl_commit_rxon(priv);
2308
2309                 /* RXON Timing */
2310                 iwl_setup_rxon_timing(priv);
2311                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
2312                                 sizeof(priv->rxon_timing), &priv->rxon_timing);
2313                 if (ret)
2314                         IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
2315                                         "Attempting to continue.\n");
2316
2317                 iwl_set_rxon_chain(priv);
2318
2319                 /* FIXME: what should be the assoc_id for AP? */
2320                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
2321                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
2322                         priv->staging_rxon.flags |=
2323                                 RXON_FLG_SHORT_PREAMBLE_MSK;
2324                 else
2325                         priv->staging_rxon.flags &=
2326                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
2327
2328                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
2329                         if (priv->assoc_capability &
2330                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
2331                                 priv->staging_rxon.flags |=
2332                                         RXON_FLG_SHORT_SLOT_MSK;
2333                         else
2334                                 priv->staging_rxon.flags &=
2335                                         ~RXON_FLG_SHORT_SLOT_MSK;
2336
2337                         if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
2338                                 priv->staging_rxon.flags &=
2339                                         ~RXON_FLG_SHORT_SLOT_MSK;
2340                 }
2341                 /* restore RXON assoc */
2342                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2343                 iwl_commit_rxon(priv);
2344                 spin_lock_irqsave(&priv->lock, flags);
2345                 iwl_activate_qos(priv, 1);
2346                 spin_unlock_irqrestore(&priv->lock, flags);
2347                 iwl_rxon_add_station(priv, iwl_bcast_addr, 0);
2348         }
2349         iwl_send_beacon_cmd(priv);
2350
2351         /* FIXME - we need to add code here to detect a totally new
2352          * configuration, reset the AP, unassoc, rxon timing, assoc,
2353          * clear sta table, add BCAST sta... */
2354 }
2355
2356
2357 static int iwl_mac_config_interface(struct ieee80211_hw *hw,
2358                                         struct ieee80211_vif *vif,
2359                                     struct ieee80211_if_conf *conf)
2360 {
2361         struct iwl_priv *priv = hw->priv;
2362         int rc;
2363
2364         if (conf == NULL)
2365                 return -EIO;
2366
2367         if (priv->vif != vif) {
2368                 IWL_DEBUG_MAC80211(priv, "leave - priv->vif != vif\n");
2369                 return 0;
2370         }
2371
2372         if (priv->iw_mode == NL80211_IFTYPE_ADHOC &&
2373             conf->changed & IEEE80211_IFCC_BEACON) {
2374                 struct sk_buff *beacon = ieee80211_beacon_get(hw, vif);
2375                 if (!beacon)
2376                         return -ENOMEM;
2377                 mutex_lock(&priv->mutex);
2378                 rc = iwl_mac_beacon_update(hw, beacon);
2379                 mutex_unlock(&priv->mutex);
2380                 if (rc)
2381                         return rc;
2382         }
2383
2384         if (!iwl_is_alive(priv))
2385                 return -EAGAIN;
2386
2387         mutex_lock(&priv->mutex);
2388
2389         if (conf->bssid)
2390                 IWL_DEBUG_MAC80211(priv, "bssid: %pM\n", conf->bssid);
2391
2392 /*
2393  * very dubious code was here; the probe filtering flag is never set:
2394  *
2395         if (unlikely(test_bit(STATUS_SCANNING, &priv->status)) &&
2396             !(priv->hw->flags & IEEE80211_HW_NO_PROBE_FILTERING)) {
2397  */
2398
2399         if (priv->iw_mode == NL80211_IFTYPE_AP) {
2400                 if (!conf->bssid) {
2401                         conf->bssid = priv->mac_addr;
2402                         memcpy(priv->bssid, priv->mac_addr, ETH_ALEN);
2403                         IWL_DEBUG_MAC80211(priv, "bssid was set to: %pM\n",
2404                                            conf->bssid);
2405                 }
2406                 if (priv->ibss_beacon)
2407                         dev_kfree_skb(priv->ibss_beacon);
2408
2409                 priv->ibss_beacon = ieee80211_beacon_get(hw, vif);
2410         }
2411
2412         if (iwl_is_rfkill(priv))
2413                 goto done;
2414
2415         if (conf->bssid && !is_zero_ether_addr(conf->bssid) &&
2416             !is_multicast_ether_addr(conf->bssid)) {
2417                 /* If there is currently a HW scan going on in the background
2418                  * then we need to cancel it else the RXON below will fail. */
2419                 if (iwl_scan_cancel_timeout(priv, 100)) {
2420                         IWL_WARN(priv, "Aborted scan still in progress "
2421                                     "after 100ms\n");
2422                         IWL_DEBUG_MAC80211(priv, "leaving - scan abort failed.\n");
2423                         mutex_unlock(&priv->mutex);
2424                         return -EAGAIN;
2425                 }
2426                 memcpy(priv->staging_rxon.bssid_addr, conf->bssid, ETH_ALEN);
2427
2428                 /* TODO: Audit driver for usage of these members and see
2429                  * if mac80211 deprecates them (priv->bssid looks like it
2430                  * shouldn't be there, but I haven't scanned the IBSS code
2431                  * to verify) - jpk */
2432                 memcpy(priv->bssid, conf->bssid, ETH_ALEN);
2433
2434                 if (priv->iw_mode == NL80211_IFTYPE_AP)
2435                         iwl_config_ap(priv);
2436                 else {
2437                         rc = iwl_commit_rxon(priv);
2438                         if ((priv->iw_mode == NL80211_IFTYPE_STATION) && rc)
2439                                 iwl_rxon_add_station(
2440                                         priv, priv->active_rxon.bssid_addr, 1);
2441                 }
2442
2443         } else {
2444                 iwl_scan_cancel_timeout(priv, 100);
2445                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2446                 iwl_commit_rxon(priv);
2447         }
2448
2449  done:
2450         IWL_DEBUG_MAC80211(priv, "leave\n");
2451         mutex_unlock(&priv->mutex);
2452
2453         return 0;
2454 }
2455
2456 static void iwl_mac_remove_interface(struct ieee80211_hw *hw,
2457                                      struct ieee80211_if_init_conf *conf)
2458 {
2459         struct iwl_priv *priv = hw->priv;
2460
2461         IWL_DEBUG_MAC80211(priv, "enter\n");
2462
2463         mutex_lock(&priv->mutex);
2464
2465         if (iwl_is_ready_rf(priv)) {
2466                 iwl_scan_cancel_timeout(priv, 100);
2467                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2468                 iwl_commit_rxon(priv);
2469         }
2470         if (priv->vif == conf->vif) {
2471                 priv->vif = NULL;
2472                 memset(priv->bssid, 0, ETH_ALEN);
2473         }
2474         mutex_unlock(&priv->mutex);
2475
2476         IWL_DEBUG_MAC80211(priv, "leave\n");
2477
2478 }
2479
2480 #define IWL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6)
2481 static void iwl_bss_info_changed(struct ieee80211_hw *hw,
2482                                      struct ieee80211_vif *vif,
2483                                      struct ieee80211_bss_conf *bss_conf,
2484                                      u32 changes)
2485 {
2486         struct iwl_priv *priv = hw->priv;
2487
2488         IWL_DEBUG_MAC80211(priv, "changes = 0x%X\n", changes);
2489
2490         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
2491                 IWL_DEBUG_MAC80211(priv, "ERP_PREAMBLE %d\n",
2492                                    bss_conf->use_short_preamble);
2493                 if (bss_conf->use_short_preamble)
2494                         priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2495                 else
2496                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2497         }
2498
2499         if (changes & BSS_CHANGED_ERP_CTS_PROT) {
2500                 IWL_DEBUG_MAC80211(priv, "ERP_CTS %d\n", bss_conf->use_cts_prot);
2501                 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
2502                         priv->staging_rxon.flags |= RXON_FLG_TGG_PROTECT_MSK;
2503                 else
2504                         priv->staging_rxon.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
2505         }
2506
2507         if (changes & BSS_CHANGED_HT) {
2508                 iwl_ht_conf(priv, bss_conf);
2509                 iwl_set_rxon_chain(priv);
2510         }
2511
2512         if (changes & BSS_CHANGED_ASSOC) {
2513                 IWL_DEBUG_MAC80211(priv, "ASSOC %d\n", bss_conf->assoc);
2514                 /* This should never happen as this function should
2515                  * never be called from interrupt context. */
2516                 if (WARN_ON_ONCE(in_interrupt()))
2517                         return;
2518                 if (bss_conf->assoc) {
2519                         priv->assoc_id = bss_conf->aid;
2520                         priv->beacon_int = bss_conf->beacon_int;
2521                         priv->power_data.dtim_period = bss_conf->dtim_period;
2522                         priv->timestamp = bss_conf->timestamp;
2523                         priv->assoc_capability = bss_conf->assoc_capability;
2524
2525                         /* we have just associated, don't start scan too early
2526                          * leave time for EAPOL exchange to complete
2527                          */
2528                         priv->next_scan_jiffies = jiffies +
2529                                         IWL_DELAY_NEXT_SCAN_AFTER_ASSOC;
2530                         mutex_lock(&priv->mutex);
2531                         iwl_post_associate(priv);
2532                         mutex_unlock(&priv->mutex);
2533                 } else {
2534                         priv->assoc_id = 0;
2535                         IWL_DEBUG_MAC80211(priv, "DISASSOC %d\n", bss_conf->assoc);
2536                 }
2537         } else if (changes && iwl_is_associated(priv) && priv->assoc_id) {
2538                         IWL_DEBUG_MAC80211(priv, "Associated Changes %d\n", changes);
2539                         iwl_send_rxon_assoc(priv);
2540         }
2541
2542 }
2543
2544 static void iwl_mac_update_tkip_key(struct ieee80211_hw *hw,
2545                         struct ieee80211_key_conf *keyconf, const u8 *addr,
2546                         u32 iv32, u16 *phase1key)
2547 {
2548
2549         struct iwl_priv *priv = hw->priv;
2550         IWL_DEBUG_MAC80211(priv, "enter\n");
2551
2552         iwl_update_tkip_key(priv, keyconf, addr, iv32, phase1key);
2553
2554         IWL_DEBUG_MAC80211(priv, "leave\n");
2555 }
2556
2557 static int iwl_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
2558                            struct ieee80211_vif *vif,
2559                            struct ieee80211_sta *sta,
2560                            struct ieee80211_key_conf *key)
2561 {
2562         struct iwl_priv *priv = hw->priv;
2563         const u8 *addr;
2564         int ret;
2565         u8 sta_id;
2566         bool is_default_wep_key = false;
2567
2568         IWL_DEBUG_MAC80211(priv, "enter\n");
2569
2570         if (priv->hw_params.sw_crypto) {
2571                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
2572                 return -EOPNOTSUPP;
2573         }
2574         addr = sta ? sta->addr : iwl_bcast_addr;
2575         sta_id = iwl_find_station(priv, addr);
2576         if (sta_id == IWL_INVALID_STATION) {
2577                 IWL_DEBUG_MAC80211(priv, "leave - %pM not in station map.\n",
2578                                    addr);
2579                 return -EINVAL;
2580
2581         }
2582
2583         mutex_lock(&priv->mutex);
2584         iwl_scan_cancel_timeout(priv, 100);
2585         mutex_unlock(&priv->mutex);
2586
2587         /* If we are getting WEP group key and we didn't receive any key mapping
2588          * so far, we are in legacy wep mode (group key only), otherwise we are
2589          * in 1X mode.
2590          * In legacy wep mode, we use another host command to the uCode */
2591         if (key->alg == ALG_WEP && sta_id == priv->hw_params.bcast_sta_id &&
2592                 priv->iw_mode != NL80211_IFTYPE_AP) {
2593                 if (cmd == SET_KEY)
2594                         is_default_wep_key = !priv->key_mapping_key;
2595                 else
2596                         is_default_wep_key =
2597                                         (key->hw_key_idx == HW_KEY_DEFAULT);
2598         }
2599
2600         switch (cmd) {
2601         case SET_KEY:
2602                 if (is_default_wep_key)
2603                         ret = iwl_set_default_wep_key(priv, key);
2604                 else
2605                         ret = iwl_set_dynamic_key(priv, key, sta_id);
2606
2607                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
2608                 break;
2609         case DISABLE_KEY:
2610                 if (is_default_wep_key)
2611                         ret = iwl_remove_default_wep_key(priv, key);
2612                 else
2613                         ret = iwl_remove_dynamic_key(priv, key, sta_id);
2614
2615                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
2616                 break;
2617         default:
2618                 ret = -EINVAL;
2619         }
2620
2621         IWL_DEBUG_MAC80211(priv, "leave\n");
2622
2623         return ret;
2624 }
2625
2626 static int iwl_mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
2627                            const struct ieee80211_tx_queue_params *params)
2628 {
2629         struct iwl_priv *priv = hw->priv;
2630         unsigned long flags;
2631         int q;
2632
2633         IWL_DEBUG_MAC80211(priv, "enter\n");
2634
2635         if (!iwl_is_ready_rf(priv)) {
2636                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
2637                 return -EIO;
2638         }
2639
2640         if (queue >= AC_NUM) {
2641                 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
2642                 return 0;
2643         }
2644
2645         q = AC_NUM - 1 - queue;
2646
2647         spin_lock_irqsave(&priv->lock, flags);
2648
2649         priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
2650         priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
2651         priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
2652         priv->qos_data.def_qos_parm.ac[q].edca_txop =
2653                         cpu_to_le16((params->txop * 32));
2654
2655         priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
2656         priv->qos_data.qos_active = 1;
2657
2658         if (priv->iw_mode == NL80211_IFTYPE_AP)
2659                 iwl_activate_qos(priv, 1);
2660         else if (priv->assoc_id && iwl_is_associated(priv))
2661                 iwl_activate_qos(priv, 0);
2662
2663         spin_unlock_irqrestore(&priv->lock, flags);
2664
2665         IWL_DEBUG_MAC80211(priv, "leave\n");
2666         return 0;
2667 }
2668
2669 static int iwl_mac_ampdu_action(struct ieee80211_hw *hw,
2670                              enum ieee80211_ampdu_mlme_action action,
2671                              struct ieee80211_sta *sta, u16 tid, u16 *ssn)
2672 {
2673         struct iwl_priv *priv = hw->priv;
2674         int ret;
2675
2676         IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n",
2677                      sta->addr, tid);
2678
2679         if (!(priv->cfg->sku & IWL_SKU_N))
2680                 return -EACCES;
2681
2682         switch (action) {
2683         case IEEE80211_AMPDU_RX_START:
2684                 IWL_DEBUG_HT(priv, "start Rx\n");
2685                 return iwl_sta_rx_agg_start(priv, sta->addr, tid, *ssn);
2686         case IEEE80211_AMPDU_RX_STOP:
2687                 IWL_DEBUG_HT(priv, "stop Rx\n");
2688                 ret = iwl_sta_rx_agg_stop(priv, sta->addr, tid);
2689                 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2690                         return 0;
2691                 else
2692                         return ret;
2693         case IEEE80211_AMPDU_TX_START:
2694                 IWL_DEBUG_HT(priv, "start Tx\n");
2695                 return iwl_tx_agg_start(priv, sta->addr, tid, ssn);
2696         case IEEE80211_AMPDU_TX_STOP:
2697                 IWL_DEBUG_HT(priv, "stop Tx\n");
2698                 ret = iwl_tx_agg_stop(priv, sta->addr, tid);
2699                 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2700                         return 0;
2701                 else
2702                         return ret;
2703         default:
2704                 IWL_DEBUG_HT(priv, "unknown\n");
2705                 return -EINVAL;
2706                 break;
2707         }
2708         return 0;
2709 }
2710
2711 static int iwl_mac_get_tx_stats(struct ieee80211_hw *hw,
2712                                 struct ieee80211_tx_queue_stats *stats)
2713 {
2714         struct iwl_priv *priv = hw->priv;
2715         int i, avail;
2716         struct iwl_tx_queue *txq;
2717         struct iwl_queue *q;
2718         unsigned long flags;
2719
2720         IWL_DEBUG_MAC80211(priv, "enter\n");
2721
2722         if (!iwl_is_ready_rf(priv)) {
2723                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
2724                 return -EIO;
2725         }
2726
2727         spin_lock_irqsave(&priv->lock, flags);
2728
2729         for (i = 0; i < AC_NUM; i++) {
2730                 txq = &priv->txq[i];
2731                 q = &txq->q;
2732                 avail = iwl_queue_space(q);
2733
2734                 stats[i].len = q->n_window - avail;
2735                 stats[i].limit = q->n_window - q->high_mark;
2736                 stats[i].count = q->n_window;
2737
2738         }
2739         spin_unlock_irqrestore(&priv->lock, flags);
2740
2741         IWL_DEBUG_MAC80211(priv, "leave\n");
2742
2743         return 0;
2744 }
2745
2746 static int iwl_mac_get_stats(struct ieee80211_hw *hw,
2747                              struct ieee80211_low_level_stats *stats)
2748 {
2749         struct iwl_priv *priv = hw->priv;
2750
2751         priv = hw->priv;
2752         IWL_DEBUG_MAC80211(priv, "enter\n");
2753         IWL_DEBUG_MAC80211(priv, "leave\n");
2754
2755         return 0;
2756 }
2757
2758 static void iwl_mac_reset_tsf(struct ieee80211_hw *hw)
2759 {
2760         struct iwl_priv *priv = hw->priv;
2761         unsigned long flags;
2762
2763         mutex_lock(&priv->mutex);
2764         IWL_DEBUG_MAC80211(priv, "enter\n");
2765
2766         spin_lock_irqsave(&priv->lock, flags);
2767         memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_info));
2768         spin_unlock_irqrestore(&priv->lock, flags);
2769
2770         iwl_reset_qos(priv);
2771
2772         spin_lock_irqsave(&priv->lock, flags);
2773         priv->assoc_id = 0;
2774         priv->assoc_capability = 0;
2775         priv->assoc_station_added = 0;
2776
2777         /* new association get rid of ibss beacon skb */
2778         if (priv->ibss_beacon)
2779                 dev_kfree_skb(priv->ibss_beacon);
2780
2781         priv->ibss_beacon = NULL;
2782
2783         priv->beacon_int = priv->hw->conf.beacon_int;
2784         priv->timestamp = 0;
2785         if ((priv->iw_mode == NL80211_IFTYPE_STATION))
2786                 priv->beacon_int = 0;
2787
2788         spin_unlock_irqrestore(&priv->lock, flags);
2789
2790         if (!iwl_is_ready_rf(priv)) {
2791                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2792                 mutex_unlock(&priv->mutex);
2793                 return;
2794         }
2795
2796         /* we are restarting association process
2797          * clear RXON_FILTER_ASSOC_MSK bit
2798          */
2799         if (priv->iw_mode != NL80211_IFTYPE_AP) {
2800                 iwl_scan_cancel_timeout(priv, 100);
2801                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2802                 iwl_commit_rxon(priv);
2803         }
2804
2805         iwl_power_update_mode(priv, 0);
2806
2807         /* Per mac80211.h: This is only used in IBSS mode... */
2808         if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
2809
2810                 /* switch to CAM during association period.
2811                  * the ucode will block any association/authentication
2812                  * frome during assiciation period if it can not hear
2813                  * the AP because of PM. the timer enable PM back is
2814                  * association do not complete
2815                  */
2816                 if (priv->hw->conf.channel->flags & (IEEE80211_CHAN_PASSIVE_SCAN |
2817                                                      IEEE80211_CHAN_RADAR))
2818                                 iwl_power_disable_management(priv, 3000);
2819
2820                 IWL_DEBUG_MAC80211(priv, "leave - not in IBSS\n");
2821                 mutex_unlock(&priv->mutex);
2822                 return;
2823         }
2824
2825         iwl_set_rate(priv);
2826
2827         mutex_unlock(&priv->mutex);
2828
2829         IWL_DEBUG_MAC80211(priv, "leave\n");
2830 }
2831
2832 static int iwl_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb)
2833 {
2834         struct iwl_priv *priv = hw->priv;
2835         unsigned long flags;
2836         __le64 timestamp;
2837
2838         IWL_DEBUG_MAC80211(priv, "enter\n");
2839
2840         if (!iwl_is_ready_rf(priv)) {
2841                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
2842                 return -EIO;
2843         }
2844
2845         if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
2846                 IWL_DEBUG_MAC80211(priv, "leave - not IBSS\n");
2847                 return -EIO;
2848         }
2849
2850         spin_lock_irqsave(&priv->lock, flags);
2851
2852         if (priv->ibss_beacon)
2853                 dev_kfree_skb(priv->ibss_beacon);
2854
2855         priv->ibss_beacon = skb;
2856
2857         priv->assoc_id = 0;
2858         timestamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
2859         priv->timestamp = le64_to_cpu(timestamp);
2860
2861         IWL_DEBUG_MAC80211(priv, "leave\n");
2862         spin_unlock_irqrestore(&priv->lock, flags);
2863
2864         iwl_reset_qos(priv);
2865
2866         iwl_post_associate(priv);
2867
2868
2869         return 0;
2870 }
2871
2872 /*****************************************************************************
2873  *
2874  * sysfs attributes
2875  *
2876  *****************************************************************************/
2877
2878 #ifdef CONFIG_IWLWIFI_DEBUG
2879
2880 /*
2881  * The following adds a new attribute to the sysfs representation
2882  * of this device driver (i.e. a new file in /sys/class/net/wlan0/device/)
2883  * used for controlling the debug level.
2884  *
2885  * See the level definitions in iwl for details.
2886  */
2887
2888 static ssize_t show_debug_level(struct device *d,
2889                                 struct device_attribute *attr, char *buf)
2890 {
2891         struct iwl_priv *priv = d->driver_data;
2892
2893         return sprintf(buf, "0x%08X\n", priv->debug_level);
2894 }
2895 static ssize_t store_debug_level(struct device *d,
2896                                 struct device_attribute *attr,
2897                                  const char *buf, size_t count)
2898 {
2899         struct iwl_priv *priv = d->driver_data;
2900         unsigned long val;
2901         int ret;
2902
2903         ret = strict_strtoul(buf, 0, &val);
2904         if (ret)
2905                 IWL_ERR(priv, "%s is not in hex or decimal form.\n", buf);
2906         else
2907                 priv->debug_level = val;
2908
2909         return strnlen(buf, count);
2910 }
2911
2912 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
2913                         show_debug_level, store_debug_level);
2914
2915
2916 #endif /* CONFIG_IWLWIFI_DEBUG */
2917
2918
2919 static ssize_t show_version(struct device *d,
2920                                 struct device_attribute *attr, char *buf)
2921 {
2922         struct iwl_priv *priv = d->driver_data;
2923         struct iwl_alive_resp *palive = &priv->card_alive;
2924         ssize_t pos = 0;
2925         u16 eeprom_ver;
2926
2927         if (palive->is_valid)
2928                 pos += sprintf(buf + pos,
2929                                 "fw version: 0x%01X.0x%01X.0x%01X.0x%01X\n"
2930                                 "fw type: 0x%01X 0x%01X\n",
2931                                 palive->ucode_major, palive->ucode_minor,
2932                                 palive->sw_rev[0], palive->sw_rev[1],
2933                                 palive->ver_type, palive->ver_subtype);
2934         else
2935                 pos += sprintf(buf + pos, "fw not loaded\n");
2936
2937         if (priv->eeprom) {
2938                 eeprom_ver = iwl_eeprom_query16(priv, EEPROM_VERSION);
2939                 pos += sprintf(buf + pos, "EEPROM version: 0x%x\n",
2940                                  eeprom_ver);
2941         } else {
2942                 pos += sprintf(buf + pos, "EEPROM not initialzed\n");
2943         }
2944
2945         return pos;
2946 }
2947
2948 static DEVICE_ATTR(version, S_IWUSR | S_IRUGO, show_version, NULL);
2949
2950 static ssize_t show_temperature(struct device *d,
2951                                 struct device_attribute *attr, char *buf)
2952 {
2953         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
2954
2955         if (!iwl_is_alive(priv))
2956                 return -EAGAIN;
2957
2958         return sprintf(buf, "%d\n", priv->temperature);
2959 }
2960
2961 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
2962
2963 static ssize_t show_tx_power(struct device *d,
2964                              struct device_attribute *attr, char *buf)
2965 {
2966         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
2967
2968         if (!iwl_is_ready_rf(priv))
2969                 return sprintf(buf, "off\n");
2970         else
2971                 return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
2972 }
2973
2974 static ssize_t store_tx_power(struct device *d,
2975                               struct device_attribute *attr,
2976                               const char *buf, size_t count)
2977 {
2978         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
2979         unsigned long val;
2980         int ret;
2981
2982         ret = strict_strtoul(buf, 10, &val);
2983         if (ret)
2984                 IWL_INFO(priv, "%s is not in decimal form.\n", buf);
2985         else
2986                 iwl_set_tx_power(priv, val, false);
2987
2988         return count;
2989 }
2990
2991 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
2992
2993 static ssize_t show_flags(struct device *d,
2994                           struct device_attribute *attr, char *buf)
2995 {
2996         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
2997
2998         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
2999 }
3000
3001 static ssize_t store_flags(struct device *d,
3002                            struct device_attribute *attr,
3003                            const char *buf, size_t count)
3004 {
3005         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3006         unsigned long val;
3007         u32 flags;
3008         int ret = strict_strtoul(buf, 0, &val);
3009         if (ret)
3010                 return ret;
3011         flags = (u32)val;
3012
3013         mutex_lock(&priv->mutex);
3014         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
3015                 /* Cancel any currently running scans... */
3016                 if (iwl_scan_cancel_timeout(priv, 100))
3017                         IWL_WARN(priv, "Could not cancel scan.\n");
3018                 else {
3019                         IWL_DEBUG_INFO(priv, "Commit rxon.flags = 0x%04X\n", flags);
3020                         priv->staging_rxon.flags = cpu_to_le32(flags);
3021                         iwl_commit_rxon(priv);
3022                 }
3023         }
3024         mutex_unlock(&priv->mutex);
3025
3026         return count;
3027 }
3028
3029 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
3030
3031 static ssize_t show_filter_flags(struct device *d,
3032                                  struct device_attribute *attr, char *buf)
3033 {
3034         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3035
3036         return sprintf(buf, "0x%04X\n",
3037                 le32_to_cpu(priv->active_rxon.filter_flags));
3038 }
3039
3040 static ssize_t store_filter_flags(struct device *d,
3041                                   struct device_attribute *attr,
3042                                   const char *buf, size_t count)
3043 {
3044         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3045         unsigned long val;
3046         u32 filter_flags;
3047         int ret = strict_strtoul(buf, 0, &val);
3048         if (ret)
3049                 return ret;
3050         filter_flags = (u32)val;
3051
3052         mutex_lock(&priv->mutex);
3053         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
3054                 /* Cancel any currently running scans... */
3055                 if (iwl_scan_cancel_timeout(priv, 100))
3056                         IWL_WARN(priv, "Could not cancel scan.\n");
3057                 else {
3058                         IWL_DEBUG_INFO(priv, "Committing rxon.filter_flags = "
3059                                        "0x%04X\n", filter_flags);
3060                         priv->staging_rxon.filter_flags =
3061                                 cpu_to_le32(filter_flags);
3062                         iwl_commit_rxon(priv);
3063                 }
3064         }
3065         mutex_unlock(&priv->mutex);
3066
3067         return count;
3068 }
3069
3070 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
3071                    store_filter_flags);
3072
3073 static ssize_t store_power_level(struct device *d,
3074                                  struct device_attribute *attr,
3075                                  const char *buf, size_t count)
3076 {
3077         struct iwl_priv *priv = dev_get_drvdata(d);
3078         int ret;
3079         unsigned long mode;
3080
3081
3082         mutex_lock(&priv->mutex);
3083
3084         ret = strict_strtoul(buf, 10, &mode);
3085         if (ret)
3086                 goto out;
3087
3088         ret = iwl_power_set_user_mode(priv, mode);
3089         if (ret) {
3090                 IWL_DEBUG_MAC80211(priv, "failed setting power mode.\n");
3091                 goto out;
3092         }
3093         ret = count;
3094
3095  out:
3096         mutex_unlock(&priv->mutex);
3097         return ret;
3098 }
3099
3100 static ssize_t show_power_level(struct device *d,
3101                                 struct device_attribute *attr, char *buf)
3102 {
3103         struct iwl_priv *priv = dev_get_drvdata(d);
3104         int mode = priv->power_data.user_power_setting;
3105         int system = priv->power_data.system_power_setting;
3106         int level = priv->power_data.power_mode;
3107         char *p = buf;
3108
3109         switch (system) {
3110         case IWL_POWER_SYS_AUTO:
3111                 p += sprintf(p, "SYSTEM:auto");
3112                 break;
3113         case IWL_POWER_SYS_AC:
3114                 p += sprintf(p, "SYSTEM:ac");
3115                 break;
3116         case IWL_POWER_SYS_BATTERY:
3117                 p += sprintf(p, "SYSTEM:battery");
3118                 break;
3119         }
3120
3121         p += sprintf(p, "\tMODE:%s", (mode < IWL_POWER_AUTO) ?
3122                         "fixed" : "auto");
3123         p += sprintf(p, "\tINDEX:%d", level);
3124         p += sprintf(p, "\n");
3125         return p - buf + 1;
3126 }
3127
3128 static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR, show_power_level,
3129                    store_power_level);
3130
3131
3132 static ssize_t show_statistics(struct device *d,
3133                                struct device_attribute *attr, char *buf)
3134 {
3135         struct iwl_priv *priv = dev_get_drvdata(d);
3136         u32 size = sizeof(struct iwl_notif_statistics);
3137         u32 len = 0, ofs = 0;
3138         u8 *data = (u8 *)&priv->statistics;
3139         int rc = 0;
3140
3141         if (!iwl_is_alive(priv))
3142                 return -EAGAIN;
3143
3144         mutex_lock(&priv->mutex);
3145         rc = iwl_send_statistics_request(priv, 0);
3146         mutex_unlock(&priv->mutex);
3147
3148         if (rc) {
3149                 len = sprintf(buf,
3150                               "Error sending statistics request: 0x%08X\n", rc);
3151                 return len;
3152         }
3153
3154         while (size && (PAGE_SIZE - len)) {
3155                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3156                                    PAGE_SIZE - len, 1);
3157                 len = strlen(buf);
3158                 if (PAGE_SIZE - len)
3159                         buf[len++] = '\n';
3160
3161                 ofs += 16;
3162                 size -= min(size, 16U);
3163         }
3164
3165         return len;
3166 }
3167
3168 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
3169
3170
3171 /*****************************************************************************
3172  *
3173  * driver setup and teardown
3174  *
3175  *****************************************************************************/
3176
3177 static void iwl_setup_deferred_work(struct iwl_priv *priv)
3178 {
3179         priv->workqueue = create_singlethread_workqueue(DRV_NAME);
3180
3181         init_waitqueue_head(&priv->wait_command_queue);
3182
3183         INIT_WORK(&priv->up, iwl_bg_up);
3184         INIT_WORK(&priv->restart, iwl_bg_restart);
3185         INIT_WORK(&priv->rx_replenish, iwl_bg_rx_replenish);
3186         INIT_WORK(&priv->rf_kill, iwl_bg_rf_kill);
3187         INIT_WORK(&priv->beacon_update, iwl_bg_beacon_update);
3188         INIT_WORK(&priv->run_time_calib_work, iwl_bg_run_time_calib_work);
3189         INIT_DELAYED_WORK(&priv->init_alive_start, iwl_bg_init_alive_start);
3190         INIT_DELAYED_WORK(&priv->alive_start, iwl_bg_alive_start);
3191
3192         iwl_setup_scan_deferred_work(priv);
3193         iwl_setup_power_deferred_work(priv);
3194
3195         if (priv->cfg->ops->lib->setup_deferred_work)
3196                 priv->cfg->ops->lib->setup_deferred_work(priv);
3197
3198         init_timer(&priv->statistics_periodic);
3199         priv->statistics_periodic.data = (unsigned long)priv;
3200         priv->statistics_periodic.function = iwl_bg_statistics_periodic;
3201
3202         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
3203                      iwl_irq_tasklet, (unsigned long)priv);
3204 }
3205
3206 static void iwl_cancel_deferred_work(struct iwl_priv *priv)
3207 {
3208         if (priv->cfg->ops->lib->cancel_deferred_work)
3209                 priv->cfg->ops->lib->cancel_deferred_work(priv);
3210
3211         cancel_delayed_work_sync(&priv->init_alive_start);
3212         cancel_delayed_work(&priv->scan_check);
3213         cancel_delayed_work_sync(&priv->set_power_save);
3214         cancel_delayed_work(&priv->alive_start);
3215         cancel_work_sync(&priv->beacon_update);
3216         del_timer_sync(&priv->statistics_periodic);
3217 }
3218
3219 static struct attribute *iwl_sysfs_entries[] = {
3220         &dev_attr_flags.attr,
3221         &dev_attr_filter_flags.attr,
3222         &dev_attr_power_level.attr,
3223         &dev_attr_statistics.attr,
3224         &dev_attr_temperature.attr,
3225         &dev_attr_tx_power.attr,
3226 #ifdef CONFIG_IWLWIFI_DEBUG
3227         &dev_attr_debug_level.attr,
3228 #endif
3229         &dev_attr_version.attr,
3230
3231         NULL
3232 };
3233
3234 static struct attribute_group iwl_attribute_group = {
3235         .name = NULL,           /* put in device directory */
3236         .attrs = iwl_sysfs_entries,
3237 };
3238
3239 static struct ieee80211_ops iwl_hw_ops = {
3240         .tx = iwl_mac_tx,
3241         .start = iwl_mac_start,
3242         .stop = iwl_mac_stop,
3243         .add_interface = iwl_mac_add_interface,
3244         .remove_interface = iwl_mac_remove_interface,
3245         .config = iwl_mac_config,
3246         .config_interface = iwl_mac_config_interface,
3247         .configure_filter = iwl_configure_filter,
3248         .set_key = iwl_mac_set_key,
3249         .update_tkip_key = iwl_mac_update_tkip_key,
3250         .get_stats = iwl_mac_get_stats,
3251         .get_tx_stats = iwl_mac_get_tx_stats,
3252         .conf_tx = iwl_mac_conf_tx,
3253         .reset_tsf = iwl_mac_reset_tsf,
3254         .bss_info_changed = iwl_bss_info_changed,
3255         .ampdu_action = iwl_mac_ampdu_action,
3256         .hw_scan = iwl_mac_hw_scan
3257 };
3258
3259 static int iwl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3260 {
3261         int err = 0;
3262         struct iwl_priv *priv;
3263         struct ieee80211_hw *hw;
3264         struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
3265         unsigned long flags;
3266         u16 pci_cmd;
3267
3268         /************************
3269          * 1. Allocating HW data
3270          ************************/
3271
3272         /* Disabling hardware scan means that mac80211 will perform scans
3273          * "the hard way", rather than using device's scan. */
3274         if (cfg->mod_params->disable_hw_scan) {
3275                 if (cfg->mod_params->debug & IWL_DL_INFO)
3276                         dev_printk(KERN_DEBUG, &(pdev->dev),
3277                                    "Disabling hw_scan\n");
3278                 iwl_hw_ops.hw_scan = NULL;
3279         }
3280
3281         hw = iwl_alloc_all(cfg, &iwl_hw_ops);
3282         if (!hw) {
3283                 err = -ENOMEM;
3284                 goto out;
3285         }
3286         priv = hw->priv;
3287         /* At this point both hw and priv are allocated. */
3288
3289         SET_IEEE80211_DEV(hw, &pdev->dev);
3290
3291         IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
3292         priv->cfg = cfg;
3293         priv->pci_dev = pdev;
3294
3295 #ifdef CONFIG_IWLWIFI_DEBUG
3296         priv->debug_level = priv->cfg->mod_params->debug;
3297         atomic_set(&priv->restrict_refcnt, 0);
3298 #endif
3299
3300         /**************************
3301          * 2. Initializing PCI bus
3302          **************************/
3303         if (pci_enable_device(pdev)) {
3304                 err = -ENODEV;
3305                 goto out_ieee80211_free_hw;
3306         }
3307
3308         pci_set_master(pdev);
3309
3310         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(36));
3311         if (!err)
3312                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(36));
3313         if (err) {
3314                 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
3315                 if (!err)
3316                         err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
3317                 /* both attempts failed: */
3318                 if (err) {
3319                         IWL_WARN(priv, "No suitable DMA available.\n");
3320                         goto out_pci_disable_device;
3321                 }
3322         }
3323
3324         err = pci_request_regions(pdev, DRV_NAME);
3325         if (err)
3326                 goto out_pci_disable_device;
3327
3328         pci_set_drvdata(pdev, priv);
3329
3330
3331         /***********************
3332          * 3. Read REV register
3333          ***********************/
3334         priv->hw_base = pci_iomap(pdev, 0, 0);
3335         if (!priv->hw_base) {
3336                 err = -ENODEV;
3337                 goto out_pci_release_regions;
3338         }
3339
3340         IWL_DEBUG_INFO(priv, "pci_resource_len = 0x%08llx\n",
3341                 (unsigned long long) pci_resource_len(pdev, 0));
3342         IWL_DEBUG_INFO(priv, "pci_resource_base = %p\n", priv->hw_base);
3343
3344         iwl_hw_detect(priv);
3345         IWL_INFO(priv, "Detected Intel Wireless WiFi Link %s REV=0x%X\n",
3346                 priv->cfg->name, priv->hw_rev);
3347
3348         /* We disable the RETRY_TIMEOUT register (0x41) to keep
3349          * PCI Tx retries from interfering with C3 CPU state */
3350         pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
3351
3352         /* amp init */
3353         err = priv->cfg->ops->lib->apm_ops.init(priv);
3354         if (err < 0) {
3355                 IWL_ERR(priv, "Failed to init APMG\n");
3356                 goto out_iounmap;
3357         }
3358         /*****************
3359          * 4. Read EEPROM
3360          *****************/
3361         /* Read the EEPROM */
3362         err = iwl_eeprom_init(priv);
3363         if (err) {
3364                 IWL_ERR(priv, "Unable to init EEPROM\n");
3365                 goto out_iounmap;
3366         }
3367         err = iwl_eeprom_check_version(priv);
3368         if (err)
3369                 goto out_free_eeprom;
3370
3371         /* extract MAC Address */
3372         iwl_eeprom_get_mac(priv, priv->mac_addr);
3373         IWL_DEBUG_INFO(priv, "MAC address: %pM\n", priv->mac_addr);
3374         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
3375
3376         /************************
3377          * 5. Setup HW constants
3378          ************************/
3379         if (iwl_set_hw_params(priv)) {
3380                 IWL_ERR(priv, "failed to set hw parameters\n");
3381                 goto out_free_eeprom;
3382         }
3383
3384         /*******************
3385          * 6. Setup priv
3386          *******************/
3387
3388         err = iwl_init_drv(priv);
3389         if (err)
3390                 goto out_free_eeprom;
3391         /* At this point both hw and priv are initialized. */
3392
3393         /**********************************
3394          * 7. Initialize module parameters
3395          **********************************/
3396
3397         /* Disable radio (SW RF KILL) via parameter when loading driver */
3398         if (priv->cfg->mod_params->disable) {
3399                 set_bit(STATUS_RF_KILL_SW, &priv->status);
3400                 IWL_DEBUG_INFO(priv, "Radio disabled.\n");
3401         }
3402
3403         /********************
3404          * 8. Setup services
3405          ********************/
3406         spin_lock_irqsave(&priv->lock, flags);
3407         iwl_disable_interrupts(priv);
3408         spin_unlock_irqrestore(&priv->lock, flags);
3409
3410         pci_enable_msi(priv->pci_dev);
3411
3412         err = request_irq(priv->pci_dev->irq, iwl_isr, IRQF_SHARED,
3413                           DRV_NAME, priv);
3414         if (err) {
3415                 IWL_ERR(priv, "Error allocating IRQ %d\n", priv->pci_dev->irq);
3416                 goto out_disable_msi;
3417         }
3418         err = sysfs_create_group(&pdev->dev.kobj, &iwl_attribute_group);
3419         if (err) {
3420                 IWL_ERR(priv, "failed to create sysfs device attributes\n");
3421                 goto out_free_irq;
3422         }
3423
3424         iwl_setup_deferred_work(priv);
3425         iwl_setup_rx_handlers(priv);
3426
3427         /**********************************
3428          * 9. Setup and register mac80211
3429          **********************************/
3430
3431         /* enable interrupts if needed: hw bug w/a */
3432         pci_read_config_word(priv->pci_dev, PCI_COMMAND, &pci_cmd);
3433         if (pci_cmd & PCI_COMMAND_INTX_DISABLE) {
3434                 pci_cmd &= ~PCI_COMMAND_INTX_DISABLE;
3435                 pci_write_config_word(priv->pci_dev, PCI_COMMAND, pci_cmd);
3436         }
3437
3438         iwl_enable_interrupts(priv);
3439
3440         err = iwl_setup_mac(priv);
3441         if (err)
3442                 goto out_remove_sysfs;
3443
3444         err = iwl_dbgfs_register(priv, DRV_NAME);
3445         if (err)
3446                 IWL_ERR(priv, "failed to create debugfs files\n");
3447
3448         /* If platform's RF_KILL switch is NOT set to KILL */
3449         if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
3450                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
3451         else
3452                 set_bit(STATUS_RF_KILL_HW, &priv->status);
3453
3454         err = iwl_rfkill_init(priv);
3455         if (err)
3456                 IWL_ERR(priv, "Unable to initialize RFKILL system. "
3457                                   "Ignoring error: %d\n", err);
3458         else
3459                 iwl_rfkill_set_hw_state(priv);
3460
3461         iwl_power_initialize(priv);
3462         return 0;
3463
3464  out_remove_sysfs:
3465         destroy_workqueue(priv->workqueue);
3466         priv->workqueue = NULL;
3467         sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
3468  out_free_irq:
3469         free_irq(priv->pci_dev->irq, priv);
3470  out_disable_msi:
3471         pci_disable_msi(priv->pci_dev);
3472         iwl_uninit_drv(priv);
3473  out_free_eeprom:
3474         iwl_eeprom_free(priv);
3475  out_iounmap:
3476         pci_iounmap(pdev, priv->hw_base);
3477  out_pci_release_regions:
3478         pci_set_drvdata(pdev, NULL);
3479         pci_release_regions(pdev);
3480  out_pci_disable_device:
3481         pci_disable_device(pdev);
3482  out_ieee80211_free_hw:
3483         ieee80211_free_hw(priv->hw);
3484  out:
3485         return err;
3486 }
3487
3488 static void __devexit iwl_pci_remove(struct pci_dev *pdev)
3489 {
3490         struct iwl_priv *priv = pci_get_drvdata(pdev);
3491         unsigned long flags;
3492
3493         if (!priv)
3494                 return;
3495
3496         IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
3497
3498         iwl_dbgfs_unregister(priv);
3499         sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
3500
3501         /* ieee80211_unregister_hw call wil cause iwl_mac_stop to
3502          * to be called and iwl_down since we are removing the device
3503          * we need to set STATUS_EXIT_PENDING bit.
3504          */
3505         set_bit(STATUS_EXIT_PENDING, &priv->status);
3506         if (priv->mac80211_registered) {
3507                 ieee80211_unregister_hw(priv->hw);
3508                 priv->mac80211_registered = 0;
3509         } else {
3510                 iwl_down(priv);
3511         }
3512
3513         /* make sure we flush any pending irq or
3514          * tasklet for the driver
3515          */
3516         spin_lock_irqsave(&priv->lock, flags);
3517         iwl_disable_interrupts(priv);
3518         spin_unlock_irqrestore(&priv->lock, flags);
3519
3520         iwl_synchronize_irq(priv);
3521
3522         iwl_rfkill_unregister(priv);
3523         iwl_dealloc_ucode_pci(priv);
3524
3525         if (priv->rxq.bd)
3526                 iwl_rx_queue_free(priv, &priv->rxq);
3527         iwl_hw_txq_ctx_free(priv);
3528
3529         iwl_clear_stations_table(priv);
3530         iwl_eeprom_free(priv);
3531
3532
3533         /*netif_stop_queue(dev); */
3534         flush_workqueue(priv->workqueue);
3535
3536         /* ieee80211_unregister_hw calls iwl_mac_stop, which flushes
3537          * priv->workqueue... so we can't take down the workqueue
3538          * until now... */
3539         destroy_workqueue(priv->workqueue);
3540         priv->workqueue = NULL;
3541
3542         free_irq(priv->pci_dev->irq, priv);
3543         pci_disable_msi(priv->pci_dev);
3544         pci_iounmap(pdev, priv->hw_base);
3545         pci_release_regions(pdev);
3546         pci_disable_device(pdev);
3547         pci_set_drvdata(pdev, NULL);
3548
3549         iwl_uninit_drv(priv);
3550
3551         if (priv->ibss_beacon)
3552                 dev_kfree_skb(priv->ibss_beacon);
3553
3554         ieee80211_free_hw(priv->hw);
3555 }
3556
3557 #ifdef CONFIG_PM
3558
3559 static int iwl_pci_suspend(struct pci_dev *pdev, pm_message_t state)
3560 {
3561         struct iwl_priv *priv = pci_get_drvdata(pdev);
3562
3563         if (priv->is_open) {
3564                 set_bit(STATUS_IN_SUSPEND, &priv->status);
3565                 iwl_mac_stop(priv->hw);
3566                 priv->is_open = 1;
3567         }
3568
3569         pci_save_state(pdev);
3570         pci_disable_device(pdev);
3571         pci_set_power_state(pdev, PCI_D3hot);
3572
3573         return 0;
3574 }
3575
3576 static int iwl_pci_resume(struct pci_dev *pdev)
3577 {
3578         struct iwl_priv *priv = pci_get_drvdata(pdev);
3579         int ret;
3580
3581         pci_set_power_state(pdev, PCI_D0);
3582         ret = pci_enable_device(pdev);
3583         if (ret)
3584                 return ret;
3585         pci_restore_state(pdev);
3586         iwl_enable_interrupts(priv);
3587
3588         if (priv->is_open)
3589                 iwl_mac_start(priv->hw);
3590
3591         clear_bit(STATUS_IN_SUSPEND, &priv->status);
3592         return 0;
3593 }
3594
3595 #endif /* CONFIG_PM */
3596
3597 /*****************************************************************************
3598  *
3599  * driver and module entry point
3600  *
3601  *****************************************************************************/
3602
3603 /* Hardware specific file defines the PCI IDs table for that hardware module */
3604 static struct pci_device_id iwl_hw_card_ids[] = {
3605 #ifdef CONFIG_IWL4965
3606         {IWL_PCI_DEVICE(0x4229, PCI_ANY_ID, iwl4965_agn_cfg)},
3607         {IWL_PCI_DEVICE(0x4230, PCI_ANY_ID, iwl4965_agn_cfg)},
3608 #endif /* CONFIG_IWL4965 */
3609 #ifdef CONFIG_IWL5000
3610         {IWL_PCI_DEVICE(0x4232, 0x1205, iwl5100_bg_cfg)},
3611         {IWL_PCI_DEVICE(0x4232, 0x1305, iwl5100_bg_cfg)},
3612         {IWL_PCI_DEVICE(0x4232, 0x1206, iwl5100_abg_cfg)},
3613         {IWL_PCI_DEVICE(0x4232, 0x1306, iwl5100_abg_cfg)},
3614         {IWL_PCI_DEVICE(0x4232, 0x1326, iwl5100_abg_cfg)},
3615         {IWL_PCI_DEVICE(0x4237, 0x1216, iwl5100_abg_cfg)},
3616         {IWL_PCI_DEVICE(0x4232, PCI_ANY_ID, iwl5100_agn_cfg)},
3617         {IWL_PCI_DEVICE(0x4235, PCI_ANY_ID, iwl5300_agn_cfg)},
3618         {IWL_PCI_DEVICE(0x4236, PCI_ANY_ID, iwl5300_agn_cfg)},
3619         {IWL_PCI_DEVICE(0x4237, PCI_ANY_ID, iwl5100_agn_cfg)},
3620 /* 5350 WiFi/WiMax */
3621         {IWL_PCI_DEVICE(0x423A, 0x1001, iwl5350_agn_cfg)},
3622         {IWL_PCI_DEVICE(0x423A, 0x1021, iwl5350_agn_cfg)},
3623         {IWL_PCI_DEVICE(0x423B, 0x1011, iwl5350_agn_cfg)},
3624 /* 5150 Wifi/WiMax */
3625         {IWL_PCI_DEVICE(0x423C, PCI_ANY_ID, iwl5150_agn_cfg)},
3626         {IWL_PCI_DEVICE(0x423D, PCI_ANY_ID, iwl5150_agn_cfg)},
3627 /* 6000/6050 Series */
3628         {IWL_PCI_DEVICE(0x0082, 0x1102, iwl6000_2ag_cfg)},
3629         {IWL_PCI_DEVICE(0x0085, 0x1112, iwl6000_2ag_cfg)},
3630         {IWL_PCI_DEVICE(0x0082, 0x1122, iwl6000_2ag_cfg)},
3631         {IWL_PCI_DEVICE(0x422B, PCI_ANY_ID, iwl6000_3agn_cfg)},
3632         {IWL_PCI_DEVICE(0x422C, PCI_ANY_ID, iwl6000_2agn_cfg)},
3633         {IWL_PCI_DEVICE(0x4238, PCI_ANY_ID, iwl6000_3agn_cfg)},
3634         {IWL_PCI_DEVICE(0x4239, PCI_ANY_ID, iwl6000_2agn_cfg)},
3635         {IWL_PCI_DEVICE(0x0082, PCI_ANY_ID, iwl6000_2agn_cfg)},
3636         {IWL_PCI_DEVICE(0x0085, PCI_ANY_ID, iwl6000_3agn_cfg)},
3637         {IWL_PCI_DEVICE(0x0086, PCI_ANY_ID, iwl6050_3agn_cfg)},
3638         {IWL_PCI_DEVICE(0x0087, PCI_ANY_ID, iwl6050_2agn_cfg)},
3639         {IWL_PCI_DEVICE(0x0088, PCI_ANY_ID, iwl6050_3agn_cfg)},
3640         {IWL_PCI_DEVICE(0x0089, PCI_ANY_ID, iwl6050_2agn_cfg)},
3641 /* 1000 Series WiFi */
3642         {IWL_PCI_DEVICE(0x0083, PCI_ANY_ID, iwl1000_bgn_cfg)},
3643         {IWL_PCI_DEVICE(0x0084, PCI_ANY_ID, iwl1000_bgn_cfg)},
3644 #endif /* CONFIG_IWL5000 */
3645
3646         {0}
3647 };
3648 MODULE_DEVICE_TABLE(pci, iwl_hw_card_ids);
3649
3650 static struct pci_driver iwl_driver = {
3651         .name = DRV_NAME,
3652         .id_table = iwl_hw_card_ids,
3653         .probe = iwl_pci_probe,
3654         .remove = __devexit_p(iwl_pci_remove),
3655 #ifdef CONFIG_PM
3656         .suspend = iwl_pci_suspend,
3657         .resume = iwl_pci_resume,
3658 #endif
3659 };
3660
3661 static int __init iwl_init(void)
3662 {
3663
3664         int ret;
3665         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
3666         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
3667
3668         ret = iwlagn_rate_control_register();
3669         if (ret) {
3670                 printk(KERN_ERR DRV_NAME
3671                        "Unable to register rate control algorithm: %d\n", ret);
3672                 return ret;
3673         }
3674
3675         ret = pci_register_driver(&iwl_driver);
3676         if (ret) {
3677                 printk(KERN_ERR DRV_NAME "Unable to initialize PCI module\n");
3678                 goto error_register;
3679         }
3680
3681         return ret;
3682
3683 error_register:
3684         iwlagn_rate_control_unregister();
3685         return ret;
3686 }
3687
3688 static void __exit iwl_exit(void)
3689 {
3690         pci_unregister_driver(&iwl_driver);
3691         iwlagn_rate_control_unregister();
3692 }
3693
3694 module_exit(iwl_exit);
3695 module_init(iwl_init);