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         cancel_delayed_work(&priv->scan_check);
 673         if (iwl_scan_cancel_timeout(priv, 100)) {
 674                 IWL_WARN(priv, "Aborted scan still in progress after 100ms\n");
 675                 IWL_DEBUG_MAC80211(priv, "leaving - scan abort failed.\n");
 676                 return -EAGAIN;
 677         }
 678
 679         iwl_commit_rxon(priv);
 680
 681         return 0;
 682 }
 683
 684 /******************************************************************************
 685  *
 686  * Generic RX handler implementations
 687  *
 688  ******************************************************************************/
 689 static void iwl_rx_reply_alive(struct iwl_priv *priv,
 690                                 struct iwl_rx_mem_buffer *rxb)
 691 {
 692         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
 693         struct iwl_alive_resp *palive;
 694         struct delayed_work *pwork;
 695
 696         palive = &pkt->u.alive_frame;
 697
 698         IWL_DEBUG_INFO(priv, "Alive ucode status 0x%08X revision "
 699                        "0x%01X 0x%01X\n",
 700                        palive->is_valid, palive->ver_type,
 701                        palive->ver_subtype);
 702
 703         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
 704                 IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
 705                 memcpy(&priv->card_alive_init,
 706                        &pkt->u.alive_frame,
 707                        sizeof(struct iwl_init_alive_resp));
 708                 pwork = &priv->init_alive_start;
 709         } else {
 710                 IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
 711                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
 712                        sizeof(struct iwl_alive_resp));
 713                 pwork = &priv->alive_start;
 714         }
 715
 716         /* We delay the ALIVE response by 5ms to
 717          * give the HW RF Kill time to activate... */
 718         if (palive->is_valid == UCODE_VALID_OK)
 719                 queue_delayed_work(priv->workqueue, pwork,
 720                                    msecs_to_jiffies(5));
 721         else
 722                 IWL_WARN(priv, "uCode did not respond OK.\n");
 723 }
 724
 725 static void iwl_bg_beacon_update(struct work_struct *work)
 726 {
 727         struct iwl_priv *priv =
 728                 container_of(work, struct iwl_priv, beacon_update);
 729         struct sk_buff *beacon;
 730
 731         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
 732         beacon = ieee80211_beacon_get(priv->hw, priv->vif);
 733
 734         if (!beacon) {
 735                 IWL_ERR(priv, "update beacon failed\n");
 736                 return;
 737         }
 738
 739         mutex_lock(&priv->mutex);
 740         /* new beacon skb is allocated every time; dispose previous.*/
 741         if (priv->ibss_beacon)
 742                 dev_kfree_skb(priv->ibss_beacon);
 743
 744         priv->ibss_beacon = beacon;
 745         mutex_unlock(&priv->mutex);
 746
 747         iwl_send_beacon_cmd(priv);
 748 }
 749
 750 /**
 751  * iwl_bg_statistics_periodic - Timer callback to queue statistics
 752  *
 753  * This callback is provided in order to send a statistics request.
 754  *
 755  * This timer function is continually reset to execute within
 756  * REG_RECALIB_PERIOD seconds since the last STATISTICS_NOTIFICATION
 757  * was received.  We need to ensure we receive the statistics in order
 758  * to update the temperature used for calibrating the TXPOWER.
 759  */
 760 static void iwl_bg_statistics_periodic(unsigned long data)
 761 {
 762         struct iwl_priv *priv = (struct iwl_priv *)data;
 763
 764         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 765                 return;
 766
 767         /* dont send host command if rf-kill is on */
 768         if (!iwl_is_ready_rf(priv))
 769                 return;
 770
 771         iwl_send_statistics_request(priv, CMD_ASYNC);
 772 }
 773
 774 static void iwl_rx_beacon_notif(struct iwl_priv *priv,
 775                                 struct iwl_rx_mem_buffer *rxb)
 776 {
 777 #ifdef CONFIG_IWLWIFI_DEBUG
 778         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
 779         struct iwl4965_beacon_notif *beacon =
 780                 (struct iwl4965_beacon_notif *)pkt->u.raw;
 781         u8 rate = iwl_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
 782
 783         IWL_DEBUG_RX(priv, "beacon status %x retries %d iss %d "
 784                 "tsf %d %d rate %d\n",
 785                 le32_to_cpu(beacon->beacon_notify_hdr.u.status) & TX_STATUS_MSK,
 786                 beacon->beacon_notify_hdr.failure_frame,
 787                 le32_to_cpu(beacon->ibss_mgr_status),
 788                 le32_to_cpu(beacon->high_tsf),
 789                 le32_to_cpu(beacon->low_tsf), rate);
 790 #endif
 791
 792         if ((priv->iw_mode == NL80211_IFTYPE_AP) &&
 793             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
 794                 queue_work(priv->workqueue, &priv->beacon_update);
 795 }
 796
 797 /* Handle notification from uCode that card's power state is changing
 798  * due to software, hardware, or critical temperature RFKILL */
 799 static void iwl_rx_card_state_notif(struct iwl_priv *priv,
 800                                     struct iwl_rx_mem_buffer *rxb)
 801 {
 802         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
 803         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
 804         unsigned long status = priv->status;
 805
 806         IWL_DEBUG_RF_KILL(priv, "Card state received: HW:%s SW:%s\n",
 807                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
 808                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
 809
 810         if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED |
 811                      RF_CARD_DISABLED)) {
 812
 813                 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
 814                             CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
 815
 816                 if (!iwl_grab_nic_access(priv)) {
 817                         iwl_write_direct32(
 818                                 priv, HBUS_TARG_MBX_C,
 819                                 HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
 820
 821                         iwl_release_nic_access(priv);
 822                 }
 823
 824                 if (!(flags & RXON_CARD_DISABLED)) {
 825                         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
 826                                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
 827                         if (!iwl_grab_nic_access(priv)) {
 828                                 iwl_write_direct32(
 829                                         priv, HBUS_TARG_MBX_C,
 830                                         HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
 831
 832                                 iwl_release_nic_access(priv);
 833                         }
 834                 }
 835
 836                 if (flags & RF_CARD_DISABLED) {
 837                         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
 838                                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
 839                         iwl_read32(priv, CSR_UCODE_DRV_GP1);
 840                         if (!iwl_grab_nic_access(priv))
 841                                 iwl_release_nic_access(priv);
 842                 }
 843         }
 844
 845         if (flags & HW_CARD_DISABLED)
 846                 set_bit(STATUS_RF_KILL_HW, &priv->status);
 847         else
 848                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
 849
 850
 851         if (flags & SW_CARD_DISABLED)
 852                 set_bit(STATUS_RF_KILL_SW, &priv->status);
 853         else
 854                 clear_bit(STATUS_RF_KILL_SW, &priv->status);
 855
 856         if (!(flags & RXON_CARD_DISABLED))
 857                 iwl_scan_cancel(priv);
 858
 859         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
 860              test_bit(STATUS_RF_KILL_HW, &priv->status)) ||
 861             (test_bit(STATUS_RF_KILL_SW, &status) !=
 862              test_bit(STATUS_RF_KILL_SW, &priv->status)))
 863                 queue_work(priv->workqueue, &priv->rf_kill);
 864         else
 865                 wake_up_interruptible(&priv->wait_command_queue);
 866 }
 867
 868 int iwl_set_pwr_src(struct iwl_priv *priv, enum iwl_pwr_src src)
 869 {
 870         int ret;
 871         unsigned long flags;
 872
 873         spin_lock_irqsave(&priv->lock, flags);
 874         ret = iwl_grab_nic_access(priv);
 875         if (ret)
 876                 goto err;
 877
 878         if (src == IWL_PWR_SRC_VAUX) {
 879                 if (pci_pme_capable(priv->pci_dev, PCI_D3cold))
 880                         iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
 881                                                APMG_PS_CTRL_VAL_PWR_SRC_VAUX,
 882                                                ~APMG_PS_CTRL_MSK_PWR_SRC);
 883         } else {
 884                 iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
 885                                        APMG_PS_CTRL_VAL_PWR_SRC_VMAIN,
 886                                        ~APMG_PS_CTRL_MSK_PWR_SRC);
 887         }
 888
 889         iwl_release_nic_access(priv);
 890 err:
 891         spin_unlock_irqrestore(&priv->lock, flags);
 892         return ret;
 893 }
 894
 895 /**
 896  * iwl_setup_rx_handlers - Initialize Rx handler callbacks
 897  *
 898  * Setup the RX handlers for each of the reply types sent from the uCode
 899  * to the host.
 900  *
 901  * This function chains into the hardware specific files for them to setup
 902  * any hardware specific handlers as well.
 903  */
 904 static void iwl_setup_rx_handlers(struct iwl_priv *priv)
 905 {
 906         priv->rx_handlers[REPLY_ALIVE] = iwl_rx_reply_alive;
 907         priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error;
 908         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
 909         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif;
 910         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
 911             iwl_rx_pm_debug_statistics_notif;
 912         priv->rx_handlers[BEACON_NOTIFICATION] = iwl_rx_beacon_notif;
 913
 914         /*
 915          * The same handler is used for both the REPLY to a discrete
 916          * statistics request from the host as well as for the periodic
 917          * statistics notifications (after received beacons) from the uCode.
 918          */
 919         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl_rx_statistics;
 920         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl_rx_statistics;
 921
 922         iwl_setup_spectrum_handlers(priv);
 923         iwl_setup_rx_scan_handlers(priv);
 924
 925         /* status change handler */
 926         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl_rx_card_state_notif;
 927
 928         priv->rx_handlers[MISSED_BEACONS_NOTIFICATION] =
 929             iwl_rx_missed_beacon_notif;
 930         /* Rx handlers */
 931         priv->rx_handlers[REPLY_RX_PHY_CMD] = iwl_rx_reply_rx_phy;
 932         priv->rx_handlers[REPLY_RX_MPDU_CMD] = iwl_rx_reply_rx;
 933         /* block ack */
 934         priv->rx_handlers[REPLY_COMPRESSED_BA] = iwl_rx_reply_compressed_ba;
 935         /* Set up hardware specific Rx handlers */
 936         priv->cfg->ops->lib->rx_handler_setup(priv);
 937 }
 938
 939 /**
 940  * iwl_rx_handle - Main entry function for receiving responses from uCode
 941  *
 942  * Uses the priv->rx_handlers callback function array to invoke
 943  * the appropriate handlers, including command responses,
 944  * frame-received notifications, and other notifications.
 945  */
 946 void iwl_rx_handle(struct iwl_priv *priv)
 947 {
 948         struct iwl_rx_mem_buffer *rxb;
 949         struct iwl_rx_packet *pkt;
 950         struct iwl_rx_queue *rxq = &priv->rxq;
 951         u32 r, i;
 952         int reclaim;
 953         unsigned long flags;
 954         u8 fill_rx = 0;
 955         u32 count = 8;
 956
 957         /* uCode's read index (stored in shared DRAM) indicates the last Rx
 958          * buffer that the driver may process (last buffer filled by ucode). */
 959         r = le16_to_cpu(rxq->rb_stts->closed_rb_num) &  0x0FFF;
 960         i = rxq->read;
 961
 962         /* Rx interrupt, but nothing sent from uCode */
 963         if (i == r)
 964                 IWL_DEBUG_RX(priv, "r = %d, i = %d\n", r, i);
 965
 966         if (iwl_rx_queue_space(rxq) > (RX_QUEUE_SIZE / 2))
 967                 fill_rx = 1;
 968
 969         while (i != r) {
 970                 rxb = rxq->queue[i];
 971
 972                 /* If an RXB doesn't have a Rx queue slot associated with it,
 973                  * then a bug has been introduced in the queue refilling
 974                  * routines -- catch it here */
 975                 BUG_ON(rxb == NULL);
 976
 977                 rxq->queue[i] = NULL;
 978
 979                 dma_sync_single_range_for_cpu(
 980                                 &priv->pci_dev->dev, rxb->real_dma_addr,
 981                                 rxb->aligned_dma_addr - rxb->real_dma_addr,
 982                                 priv->hw_params.rx_buf_size,
 983                                 PCI_DMA_FROMDEVICE);
 984                 pkt = (struct iwl_rx_packet *)rxb->skb->data;
 985
 986                 /* Reclaim a command buffer only if this packet is a response
 987                  *   to a (driver-originated) command.
 988                  * If the packet (e.g. Rx frame) originated from uCode,
 989                  *   there is no command buffer to reclaim.
 990                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
 991                  *   but apparently a few don't get set; catch them here. */
 992                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
 993                         (pkt->hdr.cmd != REPLY_RX_PHY_CMD) &&
 994                         (pkt->hdr.cmd != REPLY_RX) &&
 995                         (pkt->hdr.cmd != REPLY_RX_MPDU_CMD) &&
 996                         (pkt->hdr.cmd != REPLY_COMPRESSED_BA) &&
 997                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
 998                         (pkt->hdr.cmd != REPLY_TX);
 999
1000                 /* Based on type of command response or notification,
1001                  *   handle those that need handling via function in
1002                  *   rx_handlers table.  See iwl_setup_rx_handlers() */
1003                 if (priv->rx_handlers[pkt->hdr.cmd]) {
1004                         IWL_DEBUG_RX(priv, "r = %d, i = %d, %s, 0x%02x\n", r,
1005                                 i, get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
1006                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
1007                 } else {
1008                         /* No handling needed */
1009                         IWL_DEBUG_RX(priv,
1010                                 "r %d i %d No handler needed for %s, 0x%02x\n",
1011                                 r, i, get_cmd_string(pkt->hdr.cmd),
1012                                 pkt->hdr.cmd);
1013                 }
1014
1015                 if (reclaim) {
1016                         /* Invoke any callbacks, transfer the skb to caller, and
1017                          * fire off the (possibly) blocking iwl_send_cmd()
1018                          * as we reclaim the driver command queue */
1019                         if (rxb && rxb->skb)
1020                                 iwl_tx_cmd_complete(priv, rxb);
1021                         else
1022                                 IWL_WARN(priv, "Claim null rxb?\n");
1023                 }
1024
1025                 /* For now we just don't re-use anything.  We can tweak this
1026                  * later to try and re-use notification packets and SKBs that
1027                  * fail to Rx correctly */
1028                 if (rxb->skb != NULL) {
1029                         priv->alloc_rxb_skb--;
1030                         dev_kfree_skb_any(rxb->skb);
1031                         rxb->skb = NULL;
1032                 }
1033
1034                 pci_unmap_single(priv->pci_dev, rxb->real_dma_addr,
1035                                  priv->hw_params.rx_buf_size + 256,
1036                                  PCI_DMA_FROMDEVICE);
1037                 spin_lock_irqsave(&rxq->lock, flags);
1038                 list_add_tail(&rxb->list, &priv->rxq.rx_used);
1039                 spin_unlock_irqrestore(&rxq->lock, flags);
1040                 i = (i + 1) & RX_QUEUE_MASK;
1041                 /* If there are a lot of unused frames,
1042                  * restock the Rx queue so ucode wont assert. */
1043                 if (fill_rx) {
1044                         count++;
1045                         if (count >= 8) {
1046                                 priv->rxq.read = i;
1047                                 iwl_rx_queue_restock(priv);
1048                                 count = 0;
1049                         }
1050                 }
1051         }
1052
1053         /* Backtrack one entry */
1054         priv->rxq.read = i;
1055         iwl_rx_queue_restock(priv);
1056 }
1057
1058 /* call this function to flush any scheduled tasklet */
1059 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
1060 {
1061         /* wait to make sure we flush pending tasklet*/
1062         synchronize_irq(priv->pci_dev->irq);
1063         tasklet_kill(&priv->irq_tasklet);
1064 }
1065
1066 static void iwl_error_recovery(struct iwl_priv *priv)
1067 {
1068         unsigned long flags;
1069
1070         memcpy(&priv->staging_rxon, &priv->recovery_rxon,
1071                sizeof(priv->staging_rxon));
1072         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1073         iwl_commit_rxon(priv);
1074
1075         iwl_rxon_add_station(priv, priv->bssid, 1);
1076
1077         spin_lock_irqsave(&priv->lock, flags);
1078         priv->assoc_id = le16_to_cpu(priv->staging_rxon.assoc_id);
1079         priv->error_recovering = 0;
1080         spin_unlock_irqrestore(&priv->lock, flags);
1081 }
1082
1083 static void iwl_irq_tasklet(struct iwl_priv *priv)
1084 {
1085         u32 inta, handled = 0;
1086         u32 inta_fh;
1087         unsigned long flags;
1088 #ifdef CONFIG_IWLWIFI_DEBUG
1089         u32 inta_mask;
1090 #endif
1091
1092         spin_lock_irqsave(&priv->lock, flags);
1093
1094         /* Ack/clear/reset pending uCode interrupts.
1095          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
1096          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
1097         inta = iwl_read32(priv, CSR_INT);
1098         iwl_write32(priv, CSR_INT, inta);
1099
1100         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
1101          * Any new interrupts that happen after this, either while we're
1102          * in this tasklet, or later, will show up in next ISR/tasklet. */
1103         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1104         iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
1105
1106 #ifdef CONFIG_IWLWIFI_DEBUG
1107         if (priv->debug_level & IWL_DL_ISR) {
1108                 /* just for debug */
1109                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1110                 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1111                               inta, inta_mask, inta_fh);
1112         }
1113 #endif
1114
1115         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
1116          * atomic, make sure that inta covers all the interrupts that
1117          * we've discovered, even if FH interrupt came in just after
1118          * reading CSR_INT. */
1119         if (inta_fh & CSR49_FH_INT_RX_MASK)
1120                 inta |= CSR_INT_BIT_FH_RX;
1121         if (inta_fh & CSR49_FH_INT_TX_MASK)
1122                 inta |= CSR_INT_BIT_FH_TX;
1123
1124         /* Now service all interrupt bits discovered above. */
1125         if (inta & CSR_INT_BIT_HW_ERR) {
1126                 IWL_ERR(priv, "Microcode HW error detected.  Restarting.\n");
1127
1128                 /* Tell the device to stop sending interrupts */
1129                 iwl_disable_interrupts(priv);
1130
1131                 iwl_irq_handle_error(priv);
1132
1133                 handled |= CSR_INT_BIT_HW_ERR;
1134
1135                 spin_unlock_irqrestore(&priv->lock, flags);
1136
1137                 return;
1138         }
1139
1140 #ifdef CONFIG_IWLWIFI_DEBUG
1141         if (priv->debug_level & (IWL_DL_ISR)) {
1142                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1143                 if (inta & CSR_INT_BIT_SCD)
1144                         IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
1145                                       "the frame/frames.\n");
1146
1147                 /* Alive notification via Rx interrupt will do the real work */
1148                 if (inta & CSR_INT_BIT_ALIVE)
1149                         IWL_DEBUG_ISR(priv, "Alive interrupt\n");
1150         }
1151 #endif
1152         /* Safely ignore these bits for debug checks below */
1153         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1154
1155         /* HW RF KILL switch toggled */
1156         if (inta & CSR_INT_BIT_RF_KILL) {
1157                 int hw_rf_kill = 0;
1158                 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
1159                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
1160                         hw_rf_kill = 1;
1161
1162                 IWL_DEBUG_RF_KILL(priv, "RF_KILL bit toggled to %s.\n",
1163                                 hw_rf_kill ? "disable radio" : "enable radio");
1164
1165                 /* driver only loads ucode once setting the interface up.
1166                  * the driver allows loading the ucode even if the radio
1167                  * is killed. Hence update the killswitch state here. The
1168                  * rfkill handler will care about restarting if needed.
1169                  */
1170                 if (!test_bit(STATUS_ALIVE, &priv->status)) {
1171                         if (hw_rf_kill)
1172                                 set_bit(STATUS_RF_KILL_HW, &priv->status);
1173                         else
1174                                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
1175                         queue_work(priv->workqueue, &priv->rf_kill);
1176                 }
1177
1178                 handled |= CSR_INT_BIT_RF_KILL;
1179         }
1180
1181         /* Chip got too hot and stopped itself */
1182         if (inta & CSR_INT_BIT_CT_KILL) {
1183                 IWL_ERR(priv, "Microcode CT kill error detected.\n");
1184                 handled |= CSR_INT_BIT_CT_KILL;
1185         }
1186
1187         /* Error detected by uCode */
1188         if (inta & CSR_INT_BIT_SW_ERR) {
1189                 IWL_ERR(priv, "Microcode SW error detected. "
1190                         " Restarting 0x%X.\n", inta);
1191                 iwl_irq_handle_error(priv);
1192                 handled |= CSR_INT_BIT_SW_ERR;
1193         }
1194
1195         /* uCode wakes up after power-down sleep */
1196         if (inta & CSR_INT_BIT_WAKEUP) {
1197                 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
1198                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
1199                 iwl_txq_update_write_ptr(priv, &priv->txq[0]);
1200                 iwl_txq_update_write_ptr(priv, &priv->txq[1]);
1201                 iwl_txq_update_write_ptr(priv, &priv->txq[2]);
1202                 iwl_txq_update_write_ptr(priv, &priv->txq[3]);
1203                 iwl_txq_update_write_ptr(priv, &priv->txq[4]);
1204                 iwl_txq_update_write_ptr(priv, &priv->txq[5]);
1205
1206                 handled |= CSR_INT_BIT_WAKEUP;
1207         }
1208
1209         /* All uCode command responses, including Tx command responses,
1210          * Rx "responses" (frame-received notification), and other
1211          * notifications from uCode come through here*/
1212         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1213                 iwl_rx_handle(priv);
1214                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1215         }
1216
1217         if (inta & CSR_INT_BIT_FH_TX) {
1218                 IWL_DEBUG_ISR(priv, "Tx interrupt\n");
1219                 handled |= CSR_INT_BIT_FH_TX;
1220                 /* FH finished to write, send event */
1221                 priv->ucode_write_complete = 1;
1222                 wake_up_interruptible(&priv->wait_command_queue);
1223         }
1224
1225         if (inta & ~handled)
1226                 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
1227
1228         if (inta & ~CSR_INI_SET_MASK) {
1229                 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
1230                          inta & ~CSR_INI_SET_MASK);
1231                 IWL_WARN(priv, "   with FH_INT = 0x%08x\n", inta_fh);
1232         }
1233
1234         /* Re-enable all interrupts */
1235         /* only Re-enable if diabled by irq */
1236         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1237                 iwl_enable_interrupts(priv);
1238
1239 #ifdef CONFIG_IWLWIFI_DEBUG
1240         if (priv->debug_level & (IWL_DL_ISR)) {
1241                 inta = iwl_read32(priv, CSR_INT);
1242                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1243                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1244                 IWL_DEBUG_ISR(priv, "End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
1245                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
1246         }
1247 #endif
1248         spin_unlock_irqrestore(&priv->lock, flags);
1249 }
1250
1251 /******************************************************************************
1252  *
1253  * uCode download functions
1254  *
1255  ******************************************************************************/
1256
1257 static void iwl_dealloc_ucode_pci(struct iwl_priv *priv)
1258 {
1259         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
1260         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
1261         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1262         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
1263         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1264         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
1265 }
1266
1267 static void iwl_nic_start(struct iwl_priv *priv)
1268 {
1269         /* Remove all resets to allow NIC to operate */
1270         iwl_write32(priv, CSR_RESET, 0);
1271 }
1272
1273
1274 /**
1275  * iwl_read_ucode - Read uCode images from disk file.
1276  *
1277  * Copy into buffers for card to fetch via bus-mastering
1278  */
1279 static int iwl_read_ucode(struct iwl_priv *priv)
1280 {
1281         struct iwl_ucode *ucode;
1282         int ret = -EINVAL, index;
1283         const struct firmware *ucode_raw;
1284         const char *name_pre = priv->cfg->fw_name_pre;
1285         const unsigned int api_max = priv->cfg->ucode_api_max;
1286         const unsigned int api_min = priv->cfg->ucode_api_min;
1287         char buf[25];
1288         u8 *src;
1289         size_t len;
1290         u32 api_ver, inst_size, data_size, init_size, init_data_size, boot_size;
1291
1292         /* Ask kernel firmware_class module to get the boot firmware off disk.
1293          * request_firmware() is synchronous, file is in memory on return. */
1294         for (index = api_max; index >= api_min; index--) {
1295                 sprintf(buf, "%s%d%s", name_pre, index, ".ucode");
1296                 ret = request_firmware(&ucode_raw, buf, &priv->pci_dev->dev);
1297                 if (ret < 0) {
1298                         IWL_ERR(priv, "%s firmware file req failed: %d\n",
1299                                   buf, ret);
1300                         if (ret == -ENOENT)
1301                                 continue;
1302                         else
1303                                 goto error;
1304                 } else {
1305                         if (index < api_max)
1306                                 IWL_ERR(priv, "Loaded firmware %s, "
1307                                         "which is deprecated. "
1308                                         "Please use API v%u instead.\n",
1309                                           buf, api_max);
1310
1311                         IWL_DEBUG_INFO(priv, "Got firmware '%s' file (%zd bytes) from disk\n",
1312                                        buf, ucode_raw->size);
1313                         break;
1314                 }
1315         }
1316
1317         if (ret < 0)
1318                 goto error;
1319
1320         /* Make sure that we got at least our header! */
1321         if (ucode_raw->size < sizeof(*ucode)) {
1322                 IWL_ERR(priv, "File size way too small!\n");
1323                 ret = -EINVAL;
1324                 goto err_release;
1325         }
1326
1327         /* Data from ucode file:  header followed by uCode images */
1328         ucode = (void *)ucode_raw->data;
1329
1330         priv->ucode_ver = le32_to_cpu(ucode->ver);
1331         api_ver = IWL_UCODE_API(priv->ucode_ver);
1332         inst_size = le32_to_cpu(ucode->inst_size);
1333         data_size = le32_to_cpu(ucode->data_size);
1334         init_size = le32_to_cpu(ucode->init_size);
1335         init_data_size = le32_to_cpu(ucode->init_data_size);
1336         boot_size = le32_to_cpu(ucode->boot_size);
1337
1338         /* api_ver should match the api version forming part of the
1339          * firmware filename ... but we don't check for that and only rely
1340          * on the API version read from firmware header from here on forward */
1341
1342         if (api_ver < api_min || api_ver > api_max) {
1343                 IWL_ERR(priv, "Driver unable to support your firmware API. "
1344                           "Driver supports v%u, firmware is v%u.\n",
1345                           api_max, api_ver);
1346                 priv->ucode_ver = 0;
1347                 ret = -EINVAL;
1348                 goto err_release;
1349         }
1350         if (api_ver != api_max)
1351                 IWL_ERR(priv, "Firmware has old API version. Expected v%u, "
1352                           "got v%u. New firmware can be obtained "
1353                           "from http://www.intellinuxwireless.org.\n",
1354                           api_max, api_ver);
1355
1356         IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u\n",
1357                IWL_UCODE_MAJOR(priv->ucode_ver),
1358                IWL_UCODE_MINOR(priv->ucode_ver),
1359                IWL_UCODE_API(priv->ucode_ver),
1360                IWL_UCODE_SERIAL(priv->ucode_ver));
1361
1362         IWL_DEBUG_INFO(priv, "f/w package hdr ucode version raw = 0x%x\n",
1363                        priv->ucode_ver);
1364         IWL_DEBUG_INFO(priv, "f/w package hdr runtime inst size = %u\n",
1365                        inst_size);
1366         IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %u\n",
1367                        data_size);
1368         IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %u\n",
1369                        init_size);
1370         IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %u\n",
1371                        init_data_size);
1372         IWL_DEBUG_INFO(priv, "f/w package hdr boot inst size = %u\n",
1373                        boot_size);
1374
1375         /* Verify size of file vs. image size info in file's header */
1376         if (ucode_raw->size < sizeof(*ucode) +
1377                 inst_size + data_size + init_size +
1378                 init_data_size + boot_size) {
1379
1380                 IWL_DEBUG_INFO(priv, "uCode file size %d too small\n",
1381                                (int)ucode_raw->size);
1382                 ret = -EINVAL;
1383                 goto err_release;
1384         }
1385
1386         /* Verify that uCode images will fit in card's SRAM */
1387         if (inst_size > priv->hw_params.max_inst_size) {
1388                 IWL_DEBUG_INFO(priv, "uCode instr len %d too large to fit in\n",
1389                                inst_size);
1390                 ret = -EINVAL;
1391                 goto err_release;
1392         }
1393
1394         if (data_size > priv->hw_params.max_data_size) {
1395                 IWL_DEBUG_INFO(priv, "uCode data len %d too large to fit in\n",
1396                                 data_size);
1397                 ret = -EINVAL;
1398                 goto err_release;
1399         }
1400         if (init_size > priv->hw_params.max_inst_size) {
1401                 IWL_INFO(priv, "uCode init instr len %d too large to fit in\n",
1402                         init_size);
1403                 ret = -EINVAL;
1404                 goto err_release;
1405         }
1406         if (init_data_size > priv->hw_params.max_data_size) {
1407                 IWL_INFO(priv, "uCode init data len %d too large to fit in\n",
1408                       init_data_size);
1409                 ret = -EINVAL;
1410                 goto err_release;
1411         }
1412         if (boot_size > priv->hw_params.max_bsm_size) {
1413                 IWL_INFO(priv, "uCode boot instr len %d too large to fit in\n",
1414                         boot_size);
1415                 ret = -EINVAL;
1416                 goto err_release;
1417         }
1418
1419         /* Allocate ucode buffers for card's bus-master loading ... */
1420
1421         /* Runtime instructions and 2 copies of data:
1422          * 1) unmodified from disk
1423          * 2) backup cache for save/restore during power-downs */
1424         priv->ucode_code.len = inst_size;
1425         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
1426
1427         priv->ucode_data.len = data_size;
1428         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
1429
1430         priv->ucode_data_backup.len = data_size;
1431         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1432
1433         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
1434             !priv->ucode_data_backup.v_addr)
1435                 goto err_pci_alloc;
1436
1437         /* Initialization instructions and data */
1438         if (init_size && init_data_size) {
1439                 priv->ucode_init.len = init_size;
1440                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
1441
1442                 priv->ucode_init_data.len = init_data_size;
1443                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1444
1445                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
1446                         goto err_pci_alloc;
1447         }
1448
1449         /* Bootstrap (instructions only, no data) */
1450         if (boot_size) {
1451                 priv->ucode_boot.len = boot_size;
1452                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
1453
1454                 if (!priv->ucode_boot.v_addr)
1455                         goto err_pci_alloc;
1456         }
1457
1458         /* Copy images into buffers for card's bus-master reads ... */
1459
1460         /* Runtime instructions (first block of data in file) */
1461         src = &ucode->data[0];
1462         len = priv->ucode_code.len;
1463         IWL_DEBUG_INFO(priv, "Copying (but not loading) uCode instr len %Zd\n", len);
1464         memcpy(priv->ucode_code.v_addr, src, len);
1465         IWL_DEBUG_INFO(priv, "uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
1466                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
1467
1468         /* Runtime data (2nd block)
1469          * NOTE:  Copy into backup buffer will be done in iwl_up()  */
1470         src = &ucode->data[inst_size];
1471         len = priv->ucode_data.len;
1472         IWL_DEBUG_INFO(priv, "Copying (but not loading) uCode data len %Zd\n", len);
1473         memcpy(priv->ucode_data.v_addr, src, len);
1474         memcpy(priv->ucode_data_backup.v_addr, src, len);
1475
1476         /* Initialization instructions (3rd block) */
1477         if (init_size) {
1478                 src = &ucode->data[inst_size + data_size];
1479                 len = priv->ucode_init.len;
1480                 IWL_DEBUG_INFO(priv, "Copying (but not loading) init instr len %Zd\n",
1481                                 len);
1482                 memcpy(priv->ucode_init.v_addr, src, len);
1483         }
1484
1485         /* Initialization data (4th block) */
1486         if (init_data_size) {
1487                 src = &ucode->data[inst_size + data_size + init_size];
1488                 len = priv->ucode_init_data.len;
1489                 IWL_DEBUG_INFO(priv, "Copying (but not loading) init data len %Zd\n",
1490                                len);
1491                 memcpy(priv->ucode_init_data.v_addr, src, len);
1492         }
1493
1494         /* Bootstrap instructions (5th block) */
1495         src = &ucode->data[inst_size + data_size + init_size + init_data_size];
1496         len = priv->ucode_boot.len;
1497         IWL_DEBUG_INFO(priv, "Copying (but not loading) boot instr len %Zd\n", len);
1498         memcpy(priv->ucode_boot.v_addr, src, len);
1499
1500         /* We have our copies now, allow OS release its copies */
1501         release_firmware(ucode_raw);
1502         return 0;
1503
1504  err_pci_alloc:
1505         IWL_ERR(priv, "failed to allocate pci memory\n");
1506         ret = -ENOMEM;
1507         iwl_dealloc_ucode_pci(priv);
1508
1509  err_release:
1510         release_firmware(ucode_raw);
1511
1512  error:
1513         return ret;
1514 }
1515
1516 /* temporary */
1517 static int iwl_mac_beacon_update(struct ieee80211_hw *hw,
1518                                  struct sk_buff *skb);
1519
1520 /**
1521  * iwl_alive_start - called after REPLY_ALIVE notification received
1522  *                   from protocol/runtime uCode (initialization uCode's
1523  *                   Alive gets handled by iwl_init_alive_start()).
1524  */
1525 static void iwl_alive_start(struct iwl_priv *priv)
1526 {
1527         int ret = 0;
1528
1529         IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
1530
1531         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
1532                 /* We had an error bringing up the hardware, so take it
1533                  * all the way back down so we can try again */
1534                 IWL_DEBUG_INFO(priv, "Alive failed.\n");
1535                 goto restart;
1536         }
1537
1538         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
1539          * This is a paranoid check, because we would not have gotten the
1540          * "runtime" alive if code weren't properly loaded.  */
1541         if (iwl_verify_ucode(priv)) {
1542                 /* Runtime instruction load was bad;
1543                  * take it all the way back down so we can try again */
1544                 IWL_DEBUG_INFO(priv, "Bad runtime uCode load.\n");
1545                 goto restart;
1546         }
1547
1548         iwl_clear_stations_table(priv);
1549         ret = priv->cfg->ops->lib->alive_notify(priv);
1550         if (ret) {
1551                 IWL_WARN(priv,
1552                         "Could not complete ALIVE transition [ntf]: %d\n", ret);
1553                 goto restart;
1554         }
1555
1556         /* After the ALIVE response, we can send host commands to the uCode */
1557         set_bit(STATUS_ALIVE, &priv->status);
1558
1559         if (iwl_is_rfkill(priv))
1560                 return;
1561
1562         ieee80211_wake_queues(priv->hw);
1563
1564         priv->active_rate = priv->rates_mask;
1565         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
1566
1567         if (iwl_is_associated(priv)) {
1568                 struct iwl_rxon_cmd *active_rxon =
1569                                 (struct iwl_rxon_cmd *)&priv->active_rxon;
1570                 /* apply any changes in staging */
1571                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
1572                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1573         } else {
1574                 /* Initialize our rx_config data */
1575                 iwl_connection_init_rx_config(priv, priv->iw_mode);
1576                 iwl_set_rxon_chain(priv);
1577                 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
1578         }
1579
1580         /* Configure Bluetooth device coexistence support */
1581         iwl_send_bt_config(priv);
1582
1583         iwl_reset_run_time_calib(priv);
1584
1585         /* Configure the adapter for unassociated operation */
1586         iwl_commit_rxon(priv);
1587
1588         /* At this point, the NIC is initialized and operational */
1589         iwl_rf_kill_ct_config(priv);
1590
1591         iwl_leds_register(priv);
1592
1593         IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
1594         set_bit(STATUS_READY, &priv->status);
1595         wake_up_interruptible(&priv->wait_command_queue);
1596
1597         if (priv->error_recovering)
1598                 iwl_error_recovery(priv);
1599
1600         iwl_power_update_mode(priv, 1);
1601
1602         /* reassociate for ADHOC mode */
1603         if (priv->vif && (priv->iw_mode == NL80211_IFTYPE_ADHOC)) {
1604                 struct sk_buff *beacon = ieee80211_beacon_get(priv->hw,
1605                                                                 priv->vif);
1606                 if (beacon)
1607                         iwl_mac_beacon_update(priv->hw, beacon);
1608         }
1609
1610
1611         if (test_and_clear_bit(STATUS_MODE_PENDING, &priv->status))
1612                 iwl_set_mode(priv, priv->iw_mode);
1613
1614         return;
1615
1616  restart:
1617         queue_work(priv->workqueue, &priv->restart);
1618 }
1619
1620 static void iwl_cancel_deferred_work(struct iwl_priv *priv);
1621
1622 static void __iwl_down(struct iwl_priv *priv)
1623 {
1624         unsigned long flags;
1625         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
1626
1627         IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
1628
1629         if (!exit_pending)
1630                 set_bit(STATUS_EXIT_PENDING, &priv->status);
1631
1632         iwl_leds_unregister(priv);
1633
1634         iwl_clear_stations_table(priv);
1635
1636         /* Unblock any waiting calls */
1637         wake_up_interruptible_all(&priv->wait_command_queue);
1638
1639         /* Wipe out the EXIT_PENDING status bit if we are not actually
1640          * exiting the module */
1641         if (!exit_pending)
1642                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
1643
1644         /* stop and reset the on-board processor */
1645         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
1646
1647         /* tell the device to stop sending interrupts */
1648         spin_lock_irqsave(&priv->lock, flags);
1649         iwl_disable_interrupts(priv);
1650         spin_unlock_irqrestore(&priv->lock, flags);
1651         iwl_synchronize_irq(priv);
1652
1653         if (priv->mac80211_registered)
1654                 ieee80211_stop_queues(priv->hw);
1655
1656         /* If we have not previously called iwl_init() then
1657          * clear all bits but the RF Kill and SUSPEND bits and return */
1658         if (!iwl_is_init(priv)) {
1659                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
1660                                         STATUS_RF_KILL_HW |
1661                                test_bit(STATUS_RF_KILL_SW, &priv->status) <<
1662                                         STATUS_RF_KILL_SW |
1663                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
1664                                         STATUS_GEO_CONFIGURED |
1665                                test_bit(STATUS_IN_SUSPEND, &priv->status) <<
1666                                         STATUS_IN_SUSPEND |
1667                                test_bit(STATUS_EXIT_PENDING, &priv->status) <<
1668                                         STATUS_EXIT_PENDING;
1669                 goto exit;
1670         }
1671
1672         /* ...otherwise clear out all the status bits but the RF Kill and
1673          * SUSPEND bits and continue taking the NIC down. */
1674         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
1675                                 STATUS_RF_KILL_HW |
1676                         test_bit(STATUS_RF_KILL_SW, &priv->status) <<
1677                                 STATUS_RF_KILL_SW |
1678                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
1679                                 STATUS_GEO_CONFIGURED |
1680                         test_bit(STATUS_IN_SUSPEND, &priv->status) <<
1681                                 STATUS_IN_SUSPEND |
1682                         test_bit(STATUS_FW_ERROR, &priv->status) <<
1683                                 STATUS_FW_ERROR |
1684                        test_bit(STATUS_EXIT_PENDING, &priv->status) <<
1685                                 STATUS_EXIT_PENDING;
1686
1687         spin_lock_irqsave(&priv->lock, flags);
1688         iwl_clear_bit(priv, CSR_GP_CNTRL,
1689                          CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
1690         spin_unlock_irqrestore(&priv->lock, flags);
1691
1692         iwl_txq_ctx_stop(priv);
1693         iwl_rxq_stop(priv);
1694
1695         spin_lock_irqsave(&priv->lock, flags);
1696         if (!iwl_grab_nic_access(priv)) {
1697                 iwl_write_prph(priv, APMG_CLK_DIS_REG,
1698                                          APMG_CLK_VAL_DMA_CLK_RQT);
1699                 iwl_release_nic_access(priv);
1700         }
1701         spin_unlock_irqrestore(&priv->lock, flags);
1702
1703         udelay(5);
1704
1705         /* FIXME: apm_ops.suspend(priv) */
1706         if (exit_pending || test_bit(STATUS_IN_SUSPEND, &priv->status))
1707                 priv->cfg->ops->lib->apm_ops.stop(priv);
1708         else
1709                 priv->cfg->ops->lib->apm_ops.reset(priv);
1710  exit:
1711         memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
1712
1713         if (priv->ibss_beacon)
1714                 dev_kfree_skb(priv->ibss_beacon);
1715         priv->ibss_beacon = NULL;
1716
1717         /* clear out any free frames */
1718         iwl_clear_free_frames(priv);
1719 }
1720
1721 static void iwl_down(struct iwl_priv *priv)
1722 {
1723         mutex_lock(&priv->mutex);
1724         __iwl_down(priv);
1725         mutex_unlock(&priv->mutex);
1726
1727         iwl_cancel_deferred_work(priv);
1728 }
1729
1730 #define MAX_HW_RESTARTS 5
1731
1732 static int __iwl_up(struct iwl_priv *priv)
1733 {
1734         int i;
1735         int ret;
1736
1737         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1738                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
1739                 return -EIO;
1740         }
1741
1742         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
1743                 IWL_ERR(priv, "ucode not available for device bringup\n");
1744                 return -EIO;
1745         }
1746
1747         /* If platform's RF_KILL switch is NOT set to KILL */
1748         if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
1749                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
1750         else
1751                 set_bit(STATUS_RF_KILL_HW, &priv->status);
1752
1753         if (iwl_is_rfkill(priv)) {
1754                 iwl_enable_interrupts(priv);
1755                 IWL_WARN(priv, "Radio disabled by %s RF Kill switch\n",
1756                     test_bit(STATUS_RF_KILL_HW, &priv->status) ? "HW" : "SW");
1757                 return 0;
1758         }
1759
1760         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
1761
1762         ret = iwl_hw_nic_init(priv);
1763         if (ret) {
1764                 IWL_ERR(priv, "Unable to init nic\n");
1765                 return ret;
1766         }
1767
1768         /* make sure rfkill handshake bits are cleared */
1769         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
1770         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
1771                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
1772
1773         /* clear (again), then enable host interrupts */
1774         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
1775         iwl_enable_interrupts(priv);
1776
1777         /* really make sure rfkill handshake bits are cleared */
1778         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
1779         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
1780
1781         /* Copy original ucode data image from disk into backup cache.
1782          * This will be used to initialize the on-board processor's
1783          * data SRAM for a clean start when the runtime program first loads. */
1784         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
1785                priv->ucode_data.len);
1786
1787         for (i = 0; i < MAX_HW_RESTARTS; i++) {
1788
1789                 iwl_clear_stations_table(priv);
1790
1791                 /* load bootstrap state machine,
1792                  * load bootstrap program into processor's memory,
1793                  * prepare to load the "initialize" uCode */
1794                 ret = priv->cfg->ops->lib->load_ucode(priv);
1795
1796                 if (ret) {
1797                         IWL_ERR(priv, "Unable to set up bootstrap uCode: %d\n",
1798                                 ret);
1799                         continue;
1800                 }
1801
1802                 /* Clear out the uCode error bit if it is set */
1803                 clear_bit(STATUS_FW_ERROR, &priv->status);
1804
1805                 /* start card; "initialize" will load runtime ucode */
1806                 iwl_nic_start(priv);
1807
1808                 IWL_DEBUG_INFO(priv, DRV_NAME " is coming up\n");
1809
1810                 return 0;
1811         }
1812
1813         set_bit(STATUS_EXIT_PENDING, &priv->status);
1814         __iwl_down(priv);
1815         clear_bit(STATUS_EXIT_PENDING, &priv->status);
1816
1817         /* tried to restart and config the device for as long as our
1818          * patience could withstand */
1819         IWL_ERR(priv, "Unable to initialize device after %d attempts.\n", i);
1820         return -EIO;
1821 }
1822
1823
1824 /*****************************************************************************
1825  *
1826  * Workqueue callbacks
1827  *
1828  *****************************************************************************/
1829
1830 static void iwl_bg_init_alive_start(struct work_struct *data)
1831 {
1832         struct iwl_priv *priv =
1833             container_of(data, struct iwl_priv, init_alive_start.work);
1834
1835         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1836                 return;
1837
1838         mutex_lock(&priv->mutex);
1839         priv->cfg->ops->lib->init_alive_start(priv);
1840         mutex_unlock(&priv->mutex);
1841 }
1842
1843 static void iwl_bg_alive_start(struct work_struct *data)
1844 {
1845         struct iwl_priv *priv =
1846             container_of(data, struct iwl_priv, alive_start.work);
1847
1848         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1849                 return;
1850
1851         mutex_lock(&priv->mutex);
1852         iwl_alive_start(priv);
1853         mutex_unlock(&priv->mutex);
1854 }
1855
1856 static void iwl_bg_run_time_calib_work(struct work_struct *work)
1857 {
1858         struct iwl_priv *priv = container_of(work, struct iwl_priv,
1859                         run_time_calib_work);
1860
1861         mutex_lock(&priv->mutex);
1862
1863         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
1864             test_bit(STATUS_SCANNING, &priv->status)) {
1865                 mutex_unlock(&priv->mutex);
1866                 return;
1867         }
1868
1869         if (priv->start_calib) {
1870                 iwl_chain_noise_calibration(priv, &priv->statistics);
1871
1872                 iwl_sensitivity_calibration(priv, &priv->statistics);
1873         }
1874
1875         mutex_unlock(&priv->mutex);
1876         return;
1877 }
1878
1879 static void iwl_bg_up(struct work_struct *data)
1880 {
1881         struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
1882
1883         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1884                 return;
1885
1886         mutex_lock(&priv->mutex);
1887         __iwl_up(priv);
1888         mutex_unlock(&priv->mutex);
1889         iwl_rfkill_set_hw_state(priv);
1890 }
1891
1892 static void iwl_bg_restart(struct work_struct *data)
1893 {
1894         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
1895
1896         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1897                 return;
1898
1899         iwl_down(priv);
1900         queue_work(priv->workqueue, &priv->up);
1901 }
1902
1903 static void iwl_bg_rx_replenish(struct work_struct *data)
1904 {
1905         struct iwl_priv *priv =
1906             container_of(data, struct iwl_priv, rx_replenish);
1907
1908         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1909                 return;
1910
1911         mutex_lock(&priv->mutex);
1912         iwl_rx_replenish(priv);
1913         mutex_unlock(&priv->mutex);
1914 }
1915
1916 #define IWL_DELAY_NEXT_SCAN (HZ*2)
1917
1918 static void iwl_post_associate(struct iwl_priv *priv)
1919 {
1920         struct ieee80211_conf *conf = NULL;
1921         int ret = 0;
1922         unsigned long flags;
1923
1924         if (priv->iw_mode == NL80211_IFTYPE_AP) {
1925                 IWL_ERR(priv, "%s Should not be called in AP mode\n", __func__);
1926                 return;
1927         }
1928
1929         IWL_DEBUG_ASSOC(priv, "Associated as %d to: %pM\n",
1930                         priv->assoc_id, priv->active_rxon.bssid_addr);
1931
1932
1933         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1934                 return;
1935
1936
1937         if (!priv->vif || !priv->is_open)
1938                 return;
1939
1940         iwl_power_cancel_timeout(priv);
1941         iwl_scan_cancel_timeout(priv, 200);
1942
1943         conf = ieee80211_get_hw_conf(priv->hw);
1944
1945         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1946         iwl_commit_rxon(priv);
1947
1948         iwl_setup_rxon_timing(priv);
1949         ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
1950                               sizeof(priv->rxon_timing), &priv->rxon_timing);
1951         if (ret)
1952                 IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
1953                             "Attempting to continue.\n");
1954
1955         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
1956
1957         iwl_set_rxon_ht(priv, &priv->current_ht_config);
1958
1959         iwl_set_rxon_chain(priv);
1960         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
1961
1962         IWL_DEBUG_ASSOC(priv, "assoc id %d beacon interval %d\n",
1963                         priv->assoc_id, priv->beacon_int);
1964
1965         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
1966                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
1967         else
1968                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
1969
1970         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
1971                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
1972                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
1973                 else
1974                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
1975
1976                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
1977                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
1978
1979         }
1980
1981         iwl_commit_rxon(priv);
1982
1983         switch (priv->iw_mode) {
1984         case NL80211_IFTYPE_STATION:
1985                 break;
1986
1987         case NL80211_IFTYPE_ADHOC:
1988
1989                 /* assume default assoc id */
1990                 priv->assoc_id = 1;
1991
1992                 iwl_rxon_add_station(priv, priv->bssid, 0);
1993                 iwl_send_beacon_cmd(priv);
1994
1995                 break;
1996
1997         default:
1998                 IWL_ERR(priv, "%s Should not be called in %d mode\n",
1999                           __func__, priv->iw_mode);
2000                 break;
2001         }
2002
2003         if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
2004                 priv->assoc_station_added = 1;
2005
2006         spin_lock_irqsave(&priv->lock, flags);
2007         iwl_activate_qos(priv, 0);
2008         spin_unlock_irqrestore(&priv->lock, flags);
2009
2010         /* the chain noise calibration will enabled PM upon completion
2011          * If chain noise has already been run, then we need to enable
2012          * power management here */
2013         if (priv->chain_noise_data.state == IWL_CHAIN_NOISE_DONE)
2014                 iwl_power_enable_management(priv);
2015
2016         /* Enable Rx differential gain and sensitivity calibrations */
2017         iwl_chain_noise_reset(priv);
2018         priv->start_calib = 1;
2019
2020 }
2021
2022 /*****************************************************************************
2023  *
2024  * mac80211 entry point functions
2025  *
2026  *****************************************************************************/
2027
2028 #define UCODE_READY_TIMEOUT     (4 * HZ)
2029
2030 static int iwl_mac_start(struct ieee80211_hw *hw)
2031 {
2032         struct iwl_priv *priv = hw->priv;
2033         int ret;
2034
2035         IWL_DEBUG_MAC80211(priv, "enter\n");
2036
2037         /* we should be verifying the device is ready to be opened */
2038         mutex_lock(&priv->mutex);
2039
2040         memset(&priv->staging_rxon, 0, sizeof(struct iwl_rxon_cmd));
2041         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
2042          * ucode filename and max sizes are card-specific. */
2043
2044         if (!priv->ucode_code.len) {
2045                 ret = iwl_read_ucode(priv);
2046                 if (ret) {
2047                         IWL_ERR(priv, "Could not read microcode: %d\n", ret);
2048                         mutex_unlock(&priv->mutex);
2049                         return ret;
2050                 }
2051         }
2052
2053         ret = __iwl_up(priv);
2054
2055         mutex_unlock(&priv->mutex);
2056
2057         iwl_rfkill_set_hw_state(priv);
2058
2059         if (ret)
2060                 return ret;
2061
2062         if (iwl_is_rfkill(priv))
2063                 goto out;
2064
2065         IWL_DEBUG_INFO(priv, "Start UP work done.\n");
2066
2067         if (test_bit(STATUS_IN_SUSPEND, &priv->status))
2068                 return 0;
2069
2070         /* Wait for START_ALIVE from Run Time ucode. Otherwise callbacks from
2071          * mac80211 will not be run successfully. */
2072         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
2073                         test_bit(STATUS_READY, &priv->status),
2074                         UCODE_READY_TIMEOUT);
2075         if (!ret) {
2076                 if (!test_bit(STATUS_READY, &priv->status)) {
2077                         IWL_ERR(priv, "START_ALIVE timeout after %dms.\n",
2078                                 jiffies_to_msecs(UCODE_READY_TIMEOUT));
2079                         return -ETIMEDOUT;
2080                 }
2081         }
2082
2083 out:
2084         priv->is_open = 1;
2085         IWL_DEBUG_MAC80211(priv, "leave\n");
2086         return 0;
2087 }
2088
2089 static void iwl_mac_stop(struct ieee80211_hw *hw)
2090 {
2091         struct iwl_priv *priv = hw->priv;
2092
2093         IWL_DEBUG_MAC80211(priv, "enter\n");
2094
2095         if (!priv->is_open) {
2096                 IWL_DEBUG_MAC80211(priv, "leave - skip\n");
2097                 return;
2098         }
2099
2100         priv->is_open = 0;
2101
2102         if (iwl_is_ready_rf(priv)) {
2103                 /* stop mac, cancel any scan request and clear
2104                  * RXON_FILTER_ASSOC_MSK BIT
2105                  */
2106                 mutex_lock(&priv->mutex);
2107                 iwl_scan_cancel_timeout(priv, 100);
2108                 mutex_unlock(&priv->mutex);
2109         }
2110
2111         iwl_down(priv);
2112
2113         flush_workqueue(priv->workqueue);
2114
2115         /* enable interrupts again in order to receive rfkill changes */
2116         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2117         iwl_enable_interrupts(priv);
2118
2119         IWL_DEBUG_MAC80211(priv, "leave\n");
2120 }
2121
2122 static int iwl_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
2123 {
2124         struct iwl_priv *priv = hw->priv;
2125
2126         IWL_DEBUG_MACDUMP(priv, "enter\n");
2127
2128         IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
2129                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
2130
2131         if (iwl_tx_skb(priv, skb))
2132                 dev_kfree_skb_any(skb);
2133
2134         IWL_DEBUG_MACDUMP(priv, "leave\n");
2135         return NETDEV_TX_OK;
2136 }
2137
2138 static int iwl_mac_add_interface(struct ieee80211_hw *hw,
2139                                  struct ieee80211_if_init_conf *conf)
2140 {
2141         struct iwl_priv *priv = hw->priv;
2142         unsigned long flags;
2143
2144         IWL_DEBUG_MAC80211(priv, "enter: type %d\n", conf->type);
2145
2146         if (priv->vif) {
2147                 IWL_DEBUG_MAC80211(priv, "leave - vif != NULL\n");
2148                 return -EOPNOTSUPP;
2149         }
2150
2151         spin_lock_irqsave(&priv->lock, flags);
2152         priv->vif = conf->vif;
2153         priv->iw_mode = conf->type;
2154
2155         spin_unlock_irqrestore(&priv->lock, flags);
2156
2157         mutex_lock(&priv->mutex);
2158
2159         if (conf->mac_addr) {
2160                 IWL_DEBUG_MAC80211(priv, "Set %pM\n", conf->mac_addr);
2161                 memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
2162         }
2163
2164         if (iwl_set_mode(priv, conf->type) == -EAGAIN)
2165                 /* we are not ready, will run again when ready */
2166                 set_bit(STATUS_MODE_PENDING, &priv->status);
2167
2168         mutex_unlock(&priv->mutex);
2169
2170         IWL_DEBUG_MAC80211(priv, "leave\n");
2171         return 0;
2172 }
2173
2174 /**
2175  * iwl_mac_config - mac80211 config callback
2176  *
2177  * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
2178  * be set inappropriately and the driver currently sets the hardware up to
2179  * use it whenever needed.
2180  */
2181 static int iwl_mac_config(struct ieee80211_hw *hw, u32 changed)
2182 {
2183         struct iwl_priv *priv = hw->priv;
2184         const struct iwl_channel_info *ch_info;
2185         struct ieee80211_conf *conf = &hw->conf;
2186         unsigned long flags = 0;
2187         int ret = 0;
2188         u16 ch;
2189         int scan_active = 0;
2190
2191         mutex_lock(&priv->mutex);
2192         IWL_DEBUG_MAC80211(priv, "enter to channel %d changed 0x%X\n",
2193                                         conf->channel->hw_value, changed);
2194
2195         if (unlikely(!priv->cfg->mod_params->disable_hw_scan &&
2196                         test_bit(STATUS_SCANNING, &priv->status))) {
2197                 scan_active = 1;
2198                 IWL_DEBUG_MAC80211(priv, "leave - scanning\n");
2199         }
2200
2201
2202         /* during scanning mac80211 will delay channel setting until
2203          * scan finish with changed = 0
2204          */
2205         if (!changed || (changed & IEEE80211_CONF_CHANGE_CHANNEL)) {
2206                 if (scan_active)
2207                         goto set_ch_out;
2208
2209                 ch = ieee80211_frequency_to_channel(conf->channel->center_freq);
2210                 ch_info = iwl_get_channel_info(priv, conf->channel->band, ch);
2211                 if (!is_channel_valid(ch_info)) {
2212                         IWL_DEBUG_MAC80211(priv, "leave - invalid channel\n");
2213                         ret = -EINVAL;
2214                         goto set_ch_out;
2215                 }
2216
2217                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC &&
2218                         !is_channel_ibss(ch_info)) {
2219                         IWL_ERR(priv, "channel %d in band %d not "
2220                                 "IBSS channel\n",
2221                                 conf->channel->hw_value, conf->channel->band);
2222                         ret = -EINVAL;
2223                         goto set_ch_out;
2224                 }
2225
2226                 priv->current_ht_config.is_ht = conf_is_ht(conf);
2227
2228                 spin_lock_irqsave(&priv->lock, flags);
2229
2230
2231                 /* if we are switching from ht to 2.4 clear flags
2232                  * from any ht related info since 2.4 does not
2233                  * support ht */
2234                 if ((le16_to_cpu(priv->staging_rxon.channel) != ch))
2235                         priv->staging_rxon.flags = 0;
2236
2237                 iwl_set_rxon_channel(priv, conf->channel);
2238
2239                 iwl_set_flags_for_band(priv, conf->channel->band);
2240                 spin_unlock_irqrestore(&priv->lock, flags);
2241  set_ch_out:
2242                 /* The list of supported rates and rate mask can be different
2243                  * for each band; since the band may have changed, reset
2244                  * the rate mask to what mac80211 lists */
2245                 iwl_set_rate(priv);
2246         }
2247
2248         if (changed & IEEE80211_CONF_CHANGE_PS) {
2249                 if (conf->flags & IEEE80211_CONF_PS)
2250                         ret = iwl_power_set_user_mode(priv, IWL_POWER_INDEX_3);
2251                 else
2252                         ret = iwl_power_set_user_mode(priv, IWL_POWER_MODE_CAM);
2253                 if (ret)
2254                         IWL_DEBUG_MAC80211(priv, "Error setting power level\n");
2255
2256         }
2257
2258         if (changed & IEEE80211_CONF_CHANGE_POWER) {
2259                 IWL_DEBUG_MAC80211(priv, "TX Power old=%d new=%d\n",
2260                         priv->tx_power_user_lmt, conf->power_level);
2261
2262                 iwl_set_tx_power(priv, conf->power_level, false);
2263         }
2264
2265         /* call to ensure that 4965 rx_chain is set properly in monitor mode */
2266         iwl_set_rxon_chain(priv);
2267
2268         if (changed & IEEE80211_CONF_CHANGE_RADIO_ENABLED) {
2269                 if (conf->radio_enabled &&
2270                         iwl_radio_kill_sw_enable_radio(priv)) {
2271                         IWL_DEBUG_MAC80211(priv, "leave - RF-KILL - "
2272                                                 "waiting for uCode\n");
2273                         goto out;
2274                 }
2275
2276                 if (!conf->radio_enabled)
2277                         iwl_radio_kill_sw_disable_radio(priv);
2278         }
2279
2280         if (!conf->radio_enabled) {
2281                 IWL_DEBUG_MAC80211(priv, "leave - radio disabled\n");
2282                 goto out;
2283         }
2284
2285         if (!iwl_is_ready(priv)) {
2286                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2287                 goto out;
2288         }
2289
2290         if (scan_active)
2291                 goto out;
2292
2293         if (memcmp(&priv->active_rxon,
2294                    &priv->staging_rxon, sizeof(priv->staging_rxon)))
2295                 iwl_commit_rxon(priv);
2296         else
2297                 IWL_DEBUG_INFO(priv, "No re-sending same RXON configuration.\n");
2298
2299
2300 out:
2301         IWL_DEBUG_MAC80211(priv, "leave\n");
2302         mutex_unlock(&priv->mutex);
2303         return ret;
2304 }
2305
2306 static void iwl_config_ap(struct iwl_priv *priv)
2307 {
2308         int ret = 0;
2309         unsigned long flags;
2310
2311         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2312                 return;
2313
2314         /* The following should be done only at AP bring up */
2315         if (!iwl_is_associated(priv)) {
2316
2317                 /* RXON - unassoc (to set timing command) */
2318                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2319                 iwl_commit_rxon(priv);
2320
2321                 /* RXON Timing */
2322                 iwl_setup_rxon_timing(priv);
2323                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
2324                                 sizeof(priv->rxon_timing), &priv->rxon_timing);
2325                 if (ret)
2326                         IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
2327                                         "Attempting to continue.\n");
2328
2329                 iwl_set_rxon_chain(priv);
2330
2331                 /* FIXME: what should be the assoc_id for AP? */
2332                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
2333                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
2334                         priv->staging_rxon.flags |=
2335                                 RXON_FLG_SHORT_PREAMBLE_MSK;
2336                 else
2337                         priv->staging_rxon.flags &=
2338                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
2339
2340                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
2341                         if (priv->assoc_capability &
2342                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
2343                                 priv->staging_rxon.flags |=
2344                                         RXON_FLG_SHORT_SLOT_MSK;
2345                         else
2346                                 priv->staging_rxon.flags &=
2347                                         ~RXON_FLG_SHORT_SLOT_MSK;
2348
2349                         if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
2350                                 priv->staging_rxon.flags &=
2351                                         ~RXON_FLG_SHORT_SLOT_MSK;
2352                 }
2353                 /* restore RXON assoc */
2354                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2355                 iwl_commit_rxon(priv);
2356                 spin_lock_irqsave(&priv->lock, flags);
2357                 iwl_activate_qos(priv, 1);
2358                 spin_unlock_irqrestore(&priv->lock, flags);
2359                 iwl_rxon_add_station(priv, iwl_bcast_addr, 0);
2360         }
2361         iwl_send_beacon_cmd(priv);
2362
2363         /* FIXME - we need to add code here to detect a totally new
2364          * configuration, reset the AP, unassoc, rxon timing, assoc,
2365          * clear sta table, add BCAST sta... */
2366 }
2367
2368
2369 static int iwl_mac_config_interface(struct ieee80211_hw *hw,
2370                                         struct ieee80211_vif *vif,
2371                                     struct ieee80211_if_conf *conf)
2372 {
2373         struct iwl_priv *priv = hw->priv;
2374         int rc;
2375
2376         if (conf == NULL)
2377                 return -EIO;
2378
2379         if (priv->vif != vif) {
2380                 IWL_DEBUG_MAC80211(priv, "leave - priv->vif != vif\n");
2381                 return 0;
2382         }
2383
2384         if (priv->iw_mode == NL80211_IFTYPE_ADHOC &&
2385             conf->changed & IEEE80211_IFCC_BEACON) {
2386                 struct sk_buff *beacon = ieee80211_beacon_get(hw, vif);
2387                 if (!beacon)
2388                         return -ENOMEM;
2389                 mutex_lock(&priv->mutex);
2390                 rc = iwl_mac_beacon_update(hw, beacon);
2391                 mutex_unlock(&priv->mutex);
2392                 if (rc)
2393                         return rc;
2394         }
2395
2396         if (!iwl_is_alive(priv))
2397                 return -EAGAIN;
2398
2399         mutex_lock(&priv->mutex);
2400
2401         if (conf->bssid)
2402                 IWL_DEBUG_MAC80211(priv, "bssid: %pM\n", conf->bssid);
2403
2404 /*
2405  * very dubious code was here; the probe filtering flag is never set:
2406  *
2407         if (unlikely(test_bit(STATUS_SCANNING, &priv->status)) &&
2408             !(priv->hw->flags & IEEE80211_HW_NO_PROBE_FILTERING)) {
2409  */
2410
2411         if (priv->iw_mode == NL80211_IFTYPE_AP) {
2412                 if (!conf->bssid) {
2413                         conf->bssid = priv->mac_addr;
2414                         memcpy(priv->bssid, priv->mac_addr, ETH_ALEN);
2415                         IWL_DEBUG_MAC80211(priv, "bssid was set to: %pM\n",
2416                                            conf->bssid);
2417                 }
2418                 if (priv->ibss_beacon)
2419                         dev_kfree_skb(priv->ibss_beacon);
2420
2421                 priv->ibss_beacon = ieee80211_beacon_get(hw, vif);
2422         }
2423
2424         if (iwl_is_rfkill(priv))
2425                 goto done;
2426
2427         if (conf->bssid && !is_zero_ether_addr(conf->bssid) &&
2428             !is_multicast_ether_addr(conf->bssid)) {
2429                 /* If there is currently a HW scan going on in the background
2430                  * then we need to cancel it else the RXON below will fail. */
2431                 if (iwl_scan_cancel_timeout(priv, 100)) {
2432                         IWL_WARN(priv, "Aborted scan still in progress "
2433                                     "after 100ms\n");
2434                         IWL_DEBUG_MAC80211(priv, "leaving - scan abort failed.\n");
2435                         mutex_unlock(&priv->mutex);
2436                         return -EAGAIN;
2437                 }
2438                 memcpy(priv->staging_rxon.bssid_addr, conf->bssid, ETH_ALEN);
2439
2440                 /* TODO: Audit driver for usage of these members and see
2441                  * if mac80211 deprecates them (priv->bssid looks like it
2442                  * shouldn't be there, but I haven't scanned the IBSS code
2443                  * to verify) - jpk */
2444                 memcpy(priv->bssid, conf->bssid, ETH_ALEN);
2445
2446                 if (priv->iw_mode == NL80211_IFTYPE_AP)
2447                         iwl_config_ap(priv);
2448                 else {
2449                         rc = iwl_commit_rxon(priv);
2450                         if ((priv->iw_mode == NL80211_IFTYPE_STATION) && rc)
2451                                 iwl_rxon_add_station(
2452                                         priv, priv->active_rxon.bssid_addr, 1);
2453                 }
2454
2455         } else {
2456                 iwl_scan_cancel_timeout(priv, 100);
2457                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2458                 iwl_commit_rxon(priv);
2459         }
2460
2461  done:
2462         IWL_DEBUG_MAC80211(priv, "leave\n");
2463         mutex_unlock(&priv->mutex);
2464
2465         return 0;
2466 }
2467
2468 static void iwl_mac_remove_interface(struct ieee80211_hw *hw,
2469                                      struct ieee80211_if_init_conf *conf)
2470 {
2471         struct iwl_priv *priv = hw->priv;
2472
2473         IWL_DEBUG_MAC80211(priv, "enter\n");
2474
2475         mutex_lock(&priv->mutex);
2476
2477         if (iwl_is_ready_rf(priv)) {
2478                 iwl_scan_cancel_timeout(priv, 100);
2479                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2480                 iwl_commit_rxon(priv);
2481         }
2482         if (priv->vif == conf->vif) {
2483                 priv->vif = NULL;
2484                 memset(priv->bssid, 0, ETH_ALEN);
2485         }
2486         mutex_unlock(&priv->mutex);
2487
2488         IWL_DEBUG_MAC80211(priv, "leave\n");
2489
2490 }
2491
2492 #define IWL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6)
2493 static void iwl_bss_info_changed(struct ieee80211_hw *hw,
2494                                      struct ieee80211_vif *vif,
2495                                      struct ieee80211_bss_conf *bss_conf,
2496                                      u32 changes)
2497 {
2498         struct iwl_priv *priv = hw->priv;
2499
2500         IWL_DEBUG_MAC80211(priv, "changes = 0x%X\n", changes);
2501
2502         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
2503                 IWL_DEBUG_MAC80211(priv, "ERP_PREAMBLE %d\n",
2504                                    bss_conf->use_short_preamble);
2505                 if (bss_conf->use_short_preamble)
2506                         priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2507                 else
2508                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2509         }
2510
2511         if (changes & BSS_CHANGED_ERP_CTS_PROT) {
2512                 IWL_DEBUG_MAC80211(priv, "ERP_CTS %d\n", bss_conf->use_cts_prot);
2513                 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
2514                         priv->staging_rxon.flags |= RXON_FLG_TGG_PROTECT_MSK;
2515                 else
2516                         priv->staging_rxon.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
2517         }
2518
2519         if (changes & BSS_CHANGED_HT) {
2520                 iwl_ht_conf(priv, bss_conf);
2521                 iwl_set_rxon_chain(priv);
2522         }
2523
2524         if (changes & BSS_CHANGED_ASSOC) {
2525                 IWL_DEBUG_MAC80211(priv, "ASSOC %d\n", bss_conf->assoc);
2526                 /* This should never happen as this function should
2527                  * never be called from interrupt context. */
2528                 if (WARN_ON_ONCE(in_interrupt()))
2529                         return;
2530                 if (bss_conf->assoc) {
2531                         priv->assoc_id = bss_conf->aid;
2532                         priv->beacon_int = bss_conf->beacon_int;
2533                         priv->power_data.dtim_period = bss_conf->dtim_period;
2534                         priv->timestamp = bss_conf->timestamp;
2535                         priv->assoc_capability = bss_conf->assoc_capability;
2536
2537                         /* we have just associated, don't start scan too early
2538                          * leave time for EAPOL exchange to complete
2539                          */
2540                         priv->next_scan_jiffies = jiffies +
2541                                         IWL_DELAY_NEXT_SCAN_AFTER_ASSOC;
2542                         mutex_lock(&priv->mutex);
2543                         iwl_post_associate(priv);
2544                         mutex_unlock(&priv->mutex);
2545                 } else {
2546                         priv->assoc_id = 0;
2547                         IWL_DEBUG_MAC80211(priv, "DISASSOC %d\n", bss_conf->assoc);
2548                 }
2549         } else if (changes && iwl_is_associated(priv) && priv->assoc_id) {
2550                         IWL_DEBUG_MAC80211(priv, "Associated Changes %d\n", changes);
2551                         iwl_send_rxon_assoc(priv);
2552         }
2553
2554 }
2555
2556 static void iwl_mac_update_tkip_key(struct ieee80211_hw *hw,
2557                         struct ieee80211_key_conf *keyconf, const u8 *addr,
2558                         u32 iv32, u16 *phase1key)
2559 {
2560
2561         struct iwl_priv *priv = hw->priv;
2562         IWL_DEBUG_MAC80211(priv, "enter\n");
2563
2564         iwl_update_tkip_key(priv, keyconf, addr, iv32, phase1key);
2565
2566         IWL_DEBUG_MAC80211(priv, "leave\n");
2567 }
2568
2569 static int iwl_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
2570                            struct ieee80211_vif *vif,
2571                            struct ieee80211_sta *sta,
2572                            struct ieee80211_key_conf *key)
2573 {
2574         struct iwl_priv *priv = hw->priv;
2575         const u8 *addr;
2576         int ret;
2577         u8 sta_id;
2578         bool is_default_wep_key = false;
2579
2580         IWL_DEBUG_MAC80211(priv, "enter\n");
2581
2582         if (priv->hw_params.sw_crypto) {
2583                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
2584                 return -EOPNOTSUPP;
2585         }
2586         addr = sta ? sta->addr : iwl_bcast_addr;
2587         sta_id = iwl_find_station(priv, addr);
2588         if (sta_id == IWL_INVALID_STATION) {
2589                 IWL_DEBUG_MAC80211(priv, "leave - %pM not in station map.\n",
2590                                    addr);
2591                 return -EINVAL;
2592
2593         }
2594
2595         mutex_lock(&priv->mutex);
2596         iwl_scan_cancel_timeout(priv, 100);
2597         mutex_unlock(&priv->mutex);
2598
2599         /* If we are getting WEP group key and we didn't receive any key mapping
2600          * so far, we are in legacy wep mode (group key only), otherwise we are
2601          * in 1X mode.
2602          * In legacy wep mode, we use another host command to the uCode */
2603         if (key->alg == ALG_WEP && sta_id == priv->hw_params.bcast_sta_id &&
2604                 priv->iw_mode != NL80211_IFTYPE_AP) {
2605                 if (cmd == SET_KEY)
2606                         is_default_wep_key = !priv->key_mapping_key;
2607                 else
2608                         is_default_wep_key =
2609                                         (key->hw_key_idx == HW_KEY_DEFAULT);
2610         }
2611
2612         switch (cmd) {
2613         case SET_KEY:
2614                 if (is_default_wep_key)
2615                         ret = iwl_set_default_wep_key(priv, key);
2616                 else
2617                         ret = iwl_set_dynamic_key(priv, key, sta_id);
2618
2619                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
2620                 break;
2621         case DISABLE_KEY:
2622                 if (is_default_wep_key)
2623                         ret = iwl_remove_default_wep_key(priv, key);
2624                 else
2625                         ret = iwl_remove_dynamic_key(priv, key, sta_id);
2626
2627                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
2628                 break;
2629         default:
2630                 ret = -EINVAL;
2631         }
2632
2633         IWL_DEBUG_MAC80211(priv, "leave\n");
2634
2635         return ret;
2636 }
2637
2638 static int iwl_mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
2639                            const struct ieee80211_tx_queue_params *params)
2640 {
2641         struct iwl_priv *priv = hw->priv;
2642         unsigned long flags;
2643         int q;
2644
2645         IWL_DEBUG_MAC80211(priv, "enter\n");
2646
2647         if (!iwl_is_ready_rf(priv)) {
2648                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
2649                 return -EIO;
2650         }
2651
2652         if (queue >= AC_NUM) {
2653                 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
2654                 return 0;
2655         }
2656
2657         q = AC_NUM - 1 - queue;
2658
2659         spin_lock_irqsave(&priv->lock, flags);
2660
2661         priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
2662         priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
2663         priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
2664         priv->qos_data.def_qos_parm.ac[q].edca_txop =
2665                         cpu_to_le16((params->txop * 32));
2666
2667         priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
2668         priv->qos_data.qos_active = 1;
2669
2670         if (priv->iw_mode == NL80211_IFTYPE_AP)
2671                 iwl_activate_qos(priv, 1);
2672         else if (priv->assoc_id && iwl_is_associated(priv))
2673                 iwl_activate_qos(priv, 0);
2674
2675         spin_unlock_irqrestore(&priv->lock, flags);
2676
2677         IWL_DEBUG_MAC80211(priv, "leave\n");
2678         return 0;
2679 }
2680
2681 static int iwl_mac_ampdu_action(struct ieee80211_hw *hw,
2682                              enum ieee80211_ampdu_mlme_action action,
2683                              struct ieee80211_sta *sta, u16 tid, u16 *ssn)
2684 {
2685         struct iwl_priv *priv = hw->priv;
2686         int ret;
2687
2688         IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n",
2689                      sta->addr, tid);
2690
2691         if (!(priv->cfg->sku & IWL_SKU_N))
2692                 return -EACCES;
2693
2694         switch (action) {
2695         case IEEE80211_AMPDU_RX_START:
2696                 IWL_DEBUG_HT(priv, "start Rx\n");
2697                 return iwl_sta_rx_agg_start(priv, sta->addr, tid, *ssn);
2698         case IEEE80211_AMPDU_RX_STOP:
2699                 IWL_DEBUG_HT(priv, "stop Rx\n");
2700                 ret = iwl_sta_rx_agg_stop(priv, sta->addr, tid);
2701                 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2702                         return 0;
2703                 else
2704                         return ret;
2705         case IEEE80211_AMPDU_TX_START:
2706                 IWL_DEBUG_HT(priv, "start Tx\n");
2707                 return iwl_tx_agg_start(priv, sta->addr, tid, ssn);
2708         case IEEE80211_AMPDU_TX_STOP:
2709                 IWL_DEBUG_HT(priv, "stop Tx\n");
2710                 ret = iwl_tx_agg_stop(priv, sta->addr, tid);
2711                 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2712                         return 0;
2713                 else
2714                         return ret;
2715         default:
2716                 IWL_DEBUG_HT(priv, "unknown\n");
2717                 return -EINVAL;
2718                 break;
2719         }
2720         return 0;
2721 }
2722
2723 static int iwl_mac_get_tx_stats(struct ieee80211_hw *hw,
2724                                 struct ieee80211_tx_queue_stats *stats)
2725 {
2726         struct iwl_priv *priv = hw->priv;
2727         int i, avail;
2728         struct iwl_tx_queue *txq;
2729         struct iwl_queue *q;
2730         unsigned long flags;
2731
2732         IWL_DEBUG_MAC80211(priv, "enter\n");
2733
2734         if (!iwl_is_ready_rf(priv)) {
2735                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
2736                 return -EIO;
2737         }
2738
2739         spin_lock_irqsave(&priv->lock, flags);
2740
2741         for (i = 0; i < AC_NUM; i++) {
2742                 txq = &priv->txq[i];
2743                 q = &txq->q;
2744                 avail = iwl_queue_space(q);
2745
2746                 stats[i].len = q->n_window - avail;
2747                 stats[i].limit = q->n_window - q->high_mark;
2748                 stats[i].count = q->n_window;
2749
2750         }
2751         spin_unlock_irqrestore(&priv->lock, flags);
2752
2753         IWL_DEBUG_MAC80211(priv, "leave\n");
2754
2755         return 0;
2756 }
2757
2758 static int iwl_mac_get_stats(struct ieee80211_hw *hw,
2759                              struct ieee80211_low_level_stats *stats)
2760 {
2761         struct iwl_priv *priv = hw->priv;
2762
2763         priv = hw->priv;
2764         IWL_DEBUG_MAC80211(priv, "enter\n");
2765         IWL_DEBUG_MAC80211(priv, "leave\n");
2766
2767         return 0;
2768 }
2769
2770 static void iwl_mac_reset_tsf(struct ieee80211_hw *hw)
2771 {
2772         struct iwl_priv *priv = hw->priv;
2773         unsigned long flags;
2774
2775         mutex_lock(&priv->mutex);
2776         IWL_DEBUG_MAC80211(priv, "enter\n");
2777
2778         spin_lock_irqsave(&priv->lock, flags);
2779         memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_info));
2780         spin_unlock_irqrestore(&priv->lock, flags);
2781
2782         iwl_reset_qos(priv);
2783
2784         spin_lock_irqsave(&priv->lock, flags);
2785         priv->assoc_id = 0;
2786         priv->assoc_capability = 0;
2787         priv->assoc_station_added = 0;
2788
2789         /* new association get rid of ibss beacon skb */
2790         if (priv->ibss_beacon)
2791                 dev_kfree_skb(priv->ibss_beacon);
2792
2793         priv->ibss_beacon = NULL;
2794
2795         priv->beacon_int = priv->hw->conf.beacon_int;
2796         priv->timestamp = 0;
2797         if ((priv->iw_mode == NL80211_IFTYPE_STATION))
2798                 priv->beacon_int = 0;
2799
2800         spin_unlock_irqrestore(&priv->lock, flags);
2801
2802         if (!iwl_is_ready_rf(priv)) {
2803                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2804                 mutex_unlock(&priv->mutex);
2805                 return;
2806         }
2807
2808         /* we are restarting association process
2809          * clear RXON_FILTER_ASSOC_MSK bit
2810          */
2811         if (priv->iw_mode != NL80211_IFTYPE_AP) {
2812                 iwl_scan_cancel_timeout(priv, 100);
2813                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2814                 iwl_commit_rxon(priv);
2815         }
2816
2817         iwl_power_update_mode(priv, 0);
2818
2819         /* Per mac80211.h: This is only used in IBSS mode... */
2820         if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
2821
2822                 /* switch to CAM during association period.
2823                  * the ucode will block any association/authentication
2824                  * frome during assiciation period if it can not hear
2825                  * the AP because of PM. the timer enable PM back is
2826                  * association do not complete
2827                  */
2828                 if (priv->hw->conf.channel->flags & (IEEE80211_CHAN_PASSIVE_SCAN |
2829                                                      IEEE80211_CHAN_RADAR))
2830                                 iwl_power_disable_management(priv, 3000);
2831
2832                 IWL_DEBUG_MAC80211(priv, "leave - not in IBSS\n");
2833                 mutex_unlock(&priv->mutex);
2834                 return;
2835         }
2836
2837         iwl_set_rate(priv);
2838
2839         mutex_unlock(&priv->mutex);
2840
2841         IWL_DEBUG_MAC80211(priv, "leave\n");
2842 }
2843
2844 static int iwl_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb)
2845 {
2846         struct iwl_priv *priv = hw->priv;
2847         unsigned long flags;
2848         __le64 timestamp;
2849
2850         IWL_DEBUG_MAC80211(priv, "enter\n");
2851
2852         if (!iwl_is_ready_rf(priv)) {
2853                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
2854                 return -EIO;
2855         }
2856
2857         if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
2858                 IWL_DEBUG_MAC80211(priv, "leave - not IBSS\n");
2859                 return -EIO;
2860         }
2861
2862         spin_lock_irqsave(&priv->lock, flags);
2863
2864         if (priv->ibss_beacon)
2865                 dev_kfree_skb(priv->ibss_beacon);
2866
2867         priv->ibss_beacon = skb;
2868
2869         priv->assoc_id = 0;
2870         timestamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
2871         priv->timestamp = le64_to_cpu(timestamp);
2872
2873         IWL_DEBUG_MAC80211(priv, "leave\n");
2874         spin_unlock_irqrestore(&priv->lock, flags);
2875
2876         iwl_reset_qos(priv);
2877
2878         iwl_post_associate(priv);
2879
2880
2881         return 0;
2882 }
2883
2884 /*****************************************************************************
2885  *
2886  * sysfs attributes
2887  *
2888  *****************************************************************************/
2889
2890 #ifdef CONFIG_IWLWIFI_DEBUG
2891
2892 /*
2893  * The following adds a new attribute to the sysfs representation
2894  * of this device driver (i.e. a new file in /sys/class/net/wlan0/device/)
2895  * used for controlling the debug level.
2896  *
2897  * See the level definitions in iwl for details.
2898  */
2899
2900 static ssize_t show_debug_level(struct device *d,
2901                                 struct device_attribute *attr, char *buf)
2902 {
2903         struct iwl_priv *priv = d->driver_data;
2904
2905         return sprintf(buf, "0x%08X\n", priv->debug_level);
2906 }
2907 static ssize_t store_debug_level(struct device *d,
2908                                 struct device_attribute *attr,
2909                                  const char *buf, size_t count)
2910 {
2911         struct iwl_priv *priv = d->driver_data;
2912         unsigned long val;
2913         int ret;
2914
2915         ret = strict_strtoul(buf, 0, &val);
2916         if (ret)
2917                 IWL_ERR(priv, "%s is not in hex or decimal form.\n", buf);
2918         else
2919                 priv->debug_level = val;
2920
2921         return strnlen(buf, count);
2922 }
2923
2924 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
2925                         show_debug_level, store_debug_level);
2926
2927
2928 #endif /* CONFIG_IWLWIFI_DEBUG */
2929
2930
2931 static ssize_t show_version(struct device *d,
2932                                 struct device_attribute *attr, char *buf)
2933 {
2934         struct iwl_priv *priv = d->driver_data;
2935         struct iwl_alive_resp *palive = &priv->card_alive;
2936         ssize_t pos = 0;
2937         u16 eeprom_ver;
2938
2939         if (palive->is_valid)
2940                 pos += sprintf(buf + pos,
2941                                 "fw version: 0x%01X.0x%01X.0x%01X.0x%01X\n"
2942                                 "fw type: 0x%01X 0x%01X\n",
2943                                 palive->ucode_major, palive->ucode_minor,
2944                                 palive->sw_rev[0], palive->sw_rev[1],
2945                                 palive->ver_type, palive->ver_subtype);
2946         else
2947                 pos += sprintf(buf + pos, "fw not loaded\n");
2948
2949         if (priv->eeprom) {
2950                 eeprom_ver = iwl_eeprom_query16(priv, EEPROM_VERSION);
2951                 pos += sprintf(buf + pos, "EEPROM version: 0x%x\n",
2952                                  eeprom_ver);
2953         } else {
2954                 pos += sprintf(buf + pos, "EEPROM not initialzed\n");
2955         }
2956
2957         return pos;
2958 }
2959
2960 static DEVICE_ATTR(version, S_IWUSR | S_IRUGO, show_version, NULL);
2961
2962 static ssize_t show_temperature(struct device *d,
2963                                 struct device_attribute *attr, char *buf)
2964 {
2965         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
2966
2967         if (!iwl_is_alive(priv))
2968                 return -EAGAIN;
2969
2970         return sprintf(buf, "%d\n", priv->temperature);
2971 }
2972
2973 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
2974
2975 static ssize_t show_tx_power(struct device *d,
2976                              struct device_attribute *attr, char *buf)
2977 {
2978         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
2979
2980         if (!iwl_is_ready_rf(priv))
2981                 return sprintf(buf, "off\n");
2982         else
2983                 return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
2984 }
2985
2986 static ssize_t store_tx_power(struct device *d,
2987                               struct device_attribute *attr,
2988                               const char *buf, size_t count)
2989 {
2990         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
2991         unsigned long val;
2992         int ret;
2993
2994         ret = strict_strtoul(buf, 10, &val);
2995         if (ret)
2996                 IWL_INFO(priv, "%s is not in decimal form.\n", buf);
2997         else
2998                 iwl_set_tx_power(priv, val, false);
2999
3000         return count;
3001 }
3002
3003 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
3004
3005 static ssize_t show_flags(struct device *d,
3006                           struct device_attribute *attr, char *buf)
3007 {
3008         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3009
3010         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
3011 }
3012
3013 static ssize_t store_flags(struct device *d,
3014                            struct device_attribute *attr,
3015                            const char *buf, size_t count)
3016 {
3017         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3018         unsigned long val;
3019         u32 flags;
3020         int ret = strict_strtoul(buf, 0, &val);
3021         if (ret)
3022                 return ret;
3023         flags = (u32)val;
3024
3025         mutex_lock(&priv->mutex);
3026         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
3027                 /* Cancel any currently running scans... */
3028                 if (iwl_scan_cancel_timeout(priv, 100))
3029                         IWL_WARN(priv, "Could not cancel scan.\n");
3030                 else {
3031                         IWL_DEBUG_INFO(priv, "Commit rxon.flags = 0x%04X\n", flags);
3032                         priv->staging_rxon.flags = cpu_to_le32(flags);
3033                         iwl_commit_rxon(priv);
3034                 }
3035         }
3036         mutex_unlock(&priv->mutex);
3037
3038         return count;
3039 }
3040
3041 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
3042
3043 static ssize_t show_filter_flags(struct device *d,
3044                                  struct device_attribute *attr, char *buf)
3045 {
3046         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3047
3048         return sprintf(buf, "0x%04X\n",
3049                 le32_to_cpu(priv->active_rxon.filter_flags));
3050 }
3051
3052 static ssize_t store_filter_flags(struct device *d,
3053                                   struct device_attribute *attr,
3054                                   const char *buf, size_t count)
3055 {
3056         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3057         unsigned long val;
3058         u32 filter_flags;
3059         int ret = strict_strtoul(buf, 0, &val);
3060         if (ret)
3061                 return ret;
3062         filter_flags = (u32)val;
3063
3064         mutex_lock(&priv->mutex);
3065         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
3066                 /* Cancel any currently running scans... */
3067                 if (iwl_scan_cancel_timeout(priv, 100))
3068                         IWL_WARN(priv, "Could not cancel scan.\n");
3069                 else {
3070                         IWL_DEBUG_INFO(priv, "Committing rxon.filter_flags = "
3071                                        "0x%04X\n", filter_flags);
3072                         priv->staging_rxon.filter_flags =
3073                                 cpu_to_le32(filter_flags);
3074                         iwl_commit_rxon(priv);
3075                 }
3076         }
3077         mutex_unlock(&priv->mutex);
3078
3079         return count;
3080 }
3081
3082 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
3083                    store_filter_flags);
3084
3085 static ssize_t store_power_level(struct device *d,
3086                                  struct device_attribute *attr,
3087                                  const char *buf, size_t count)
3088 {
3089         struct iwl_priv *priv = dev_get_drvdata(d);
3090         int ret;
3091         unsigned long mode;
3092
3093
3094         mutex_lock(&priv->mutex);
3095
3096         ret = strict_strtoul(buf, 10, &mode);
3097         if (ret)
3098                 goto out;
3099
3100         ret = iwl_power_set_user_mode(priv, mode);
3101         if (ret) {
3102                 IWL_DEBUG_MAC80211(priv, "failed setting power mode.\n");
3103                 goto out;
3104         }
3105         ret = count;
3106
3107  out:
3108         mutex_unlock(&priv->mutex);
3109         return ret;
3110 }
3111
3112 static ssize_t show_power_level(struct device *d,
3113                                 struct device_attribute *attr, char *buf)
3114 {
3115         struct iwl_priv *priv = dev_get_drvdata(d);
3116         int mode = priv->power_data.user_power_setting;
3117         int system = priv->power_data.system_power_setting;
3118         int level = priv->power_data.power_mode;
3119         char *p = buf;
3120
3121         switch (system) {
3122         case IWL_POWER_SYS_AUTO:
3123                 p += sprintf(p, "SYSTEM:auto");
3124                 break;
3125         case IWL_POWER_SYS_AC:
3126                 p += sprintf(p, "SYSTEM:ac");
3127                 break;
3128         case IWL_POWER_SYS_BATTERY:
3129                 p += sprintf(p, "SYSTEM:battery");
3130                 break;
3131         }
3132
3133         p += sprintf(p, "\tMODE:%s", (mode < IWL_POWER_AUTO) ?
3134                         "fixed" : "auto");
3135         p += sprintf(p, "\tINDEX:%d", level);
3136         p += sprintf(p, "\n");
3137         return p - buf + 1;
3138 }
3139
3140 static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR, show_power_level,
3141                    store_power_level);
3142
3143
3144 static ssize_t show_statistics(struct device *d,
3145                                struct device_attribute *attr, char *buf)
3146 {
3147         struct iwl_priv *priv = dev_get_drvdata(d);
3148         u32 size = sizeof(struct iwl_notif_statistics);
3149         u32 len = 0, ofs = 0;
3150         u8 *data = (u8 *)&priv->statistics;
3151         int rc = 0;
3152
3153         if (!iwl_is_alive(priv))
3154                 return -EAGAIN;
3155
3156         mutex_lock(&priv->mutex);
3157         rc = iwl_send_statistics_request(priv, 0);
3158         mutex_unlock(&priv->mutex);
3159
3160         if (rc) {
3161                 len = sprintf(buf,
3162                               "Error sending statistics request: 0x%08X\n", rc);
3163                 return len;
3164         }
3165
3166         while (size && (PAGE_SIZE - len)) {
3167                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3168                                    PAGE_SIZE - len, 1);
3169                 len = strlen(buf);
3170                 if (PAGE_SIZE - len)
3171                         buf[len++] = '\n';
3172
3173                 ofs += 16;
3174                 size -= min(size, 16U);
3175         }
3176
3177         return len;
3178 }
3179
3180 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
3181
3182
3183 /*****************************************************************************
3184  *
3185  * driver setup and teardown
3186  *
3187  *****************************************************************************/
3188
3189 static void iwl_setup_deferred_work(struct iwl_priv *priv)
3190 {
3191         priv->workqueue = create_singlethread_workqueue(DRV_NAME);
3192
3193         init_waitqueue_head(&priv->wait_command_queue);
3194
3195         INIT_WORK(&priv->up, iwl_bg_up);
3196         INIT_WORK(&priv->restart, iwl_bg_restart);
3197         INIT_WORK(&priv->rx_replenish, iwl_bg_rx_replenish);
3198         INIT_WORK(&priv->rf_kill, iwl_bg_rf_kill);
3199         INIT_WORK(&priv->beacon_update, iwl_bg_beacon_update);
3200         INIT_WORK(&priv->run_time_calib_work, iwl_bg_run_time_calib_work);
3201         INIT_DELAYED_WORK(&priv->init_alive_start, iwl_bg_init_alive_start);
3202         INIT_DELAYED_WORK(&priv->alive_start, iwl_bg_alive_start);
3203
3204         iwl_setup_scan_deferred_work(priv);
3205         iwl_setup_power_deferred_work(priv);
3206
3207         if (priv->cfg->ops->lib->setup_deferred_work)
3208                 priv->cfg->ops->lib->setup_deferred_work(priv);
3209
3210         init_timer(&priv->statistics_periodic);
3211         priv->statistics_periodic.data = (unsigned long)priv;
3212         priv->statistics_periodic.function = iwl_bg_statistics_periodic;
3213
3214         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
3215                      iwl_irq_tasklet, (unsigned long)priv);
3216 }
3217
3218 static void iwl_cancel_deferred_work(struct iwl_priv *priv)
3219 {
3220         if (priv->cfg->ops->lib->cancel_deferred_work)
3221                 priv->cfg->ops->lib->cancel_deferred_work(priv);
3222
3223         cancel_delayed_work_sync(&priv->init_alive_start);
3224         cancel_delayed_work(&priv->scan_check);
3225         cancel_delayed_work_sync(&priv->set_power_save);
3226         cancel_delayed_work(&priv->alive_start);
3227         cancel_work_sync(&priv->beacon_update);
3228         del_timer_sync(&priv->statistics_periodic);
3229 }
3230
3231 static struct attribute *iwl_sysfs_entries[] = {
3232         &dev_attr_flags.attr,
3233         &dev_attr_filter_flags.attr,
3234         &dev_attr_power_level.attr,
3235         &dev_attr_statistics.attr,
3236         &dev_attr_temperature.attr,
3237         &dev_attr_tx_power.attr,
3238 #ifdef CONFIG_IWLWIFI_DEBUG
3239         &dev_attr_debug_level.attr,
3240 #endif
3241         &dev_attr_version.attr,
3242
3243         NULL
3244 };
3245
3246 static struct attribute_group iwl_attribute_group = {
3247         .name = NULL,           /* put in device directory */
3248         .attrs = iwl_sysfs_entries,
3249 };
3250
3251 static struct ieee80211_ops iwl_hw_ops = {
3252         .tx = iwl_mac_tx,
3253         .start = iwl_mac_start,
3254         .stop = iwl_mac_stop,
3255         .add_interface = iwl_mac_add_interface,
3256         .remove_interface = iwl_mac_remove_interface,
3257         .config = iwl_mac_config,
3258         .config_interface = iwl_mac_config_interface,
3259         .configure_filter = iwl_configure_filter,
3260         .set_key = iwl_mac_set_key,
3261         .update_tkip_key = iwl_mac_update_tkip_key,
3262         .get_stats = iwl_mac_get_stats,
3263         .get_tx_stats = iwl_mac_get_tx_stats,
3264         .conf_tx = iwl_mac_conf_tx,
3265         .reset_tsf = iwl_mac_reset_tsf,
3266         .bss_info_changed = iwl_bss_info_changed,
3267         .ampdu_action = iwl_mac_ampdu_action,
3268         .hw_scan = iwl_mac_hw_scan
3269 };
3270
3271 static int iwl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3272 {
3273         int err = 0;
3274         struct iwl_priv *priv;
3275         struct ieee80211_hw *hw;
3276         struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
3277         unsigned long flags;
3278         u16 pci_cmd;
3279
3280         /************************
3281          * 1. Allocating HW data
3282          ************************/
3283
3284         /* Disabling hardware scan means that mac80211 will perform scans
3285          * "the hard way", rather than using device's scan. */
3286         if (cfg->mod_params->disable_hw_scan) {
3287                 if (cfg->mod_params->debug & IWL_DL_INFO)
3288                         dev_printk(KERN_DEBUG, &(pdev->dev),
3289                                    "Disabling hw_scan\n");
3290                 iwl_hw_ops.hw_scan = NULL;
3291         }
3292
3293         hw = iwl_alloc_all(cfg, &iwl_hw_ops);
3294         if (!hw) {
3295                 err = -ENOMEM;
3296                 goto out;
3297         }
3298         priv = hw->priv;
3299         /* At this point both hw and priv are allocated. */
3300
3301         SET_IEEE80211_DEV(hw, &pdev->dev);
3302
3303         IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
3304         priv->cfg = cfg;
3305         priv->pci_dev = pdev;
3306
3307 #ifdef CONFIG_IWLWIFI_DEBUG
3308         priv->debug_level = priv->cfg->mod_params->debug;
3309         atomic_set(&priv->restrict_refcnt, 0);
3310 #endif
3311
3312         /**************************
3313          * 2. Initializing PCI bus
3314          **************************/
3315         if (pci_enable_device(pdev)) {
3316                 err = -ENODEV;
3317                 goto out_ieee80211_free_hw;
3318         }
3319
3320         pci_set_master(pdev);
3321
3322         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(36));
3323         if (!err)
3324                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(36));
3325         if (err) {
3326                 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
3327                 if (!err)
3328                         err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
3329                 /* both attempts failed: */
3330                 if (err) {
3331                         IWL_WARN(priv, "No suitable DMA available.\n");
3332                         goto out_pci_disable_device;
3333                 }
3334         }
3335
3336         err = pci_request_regions(pdev, DRV_NAME);
3337         if (err)
3338                 goto out_pci_disable_device;
3339
3340         pci_set_drvdata(pdev, priv);
3341
3342
3343         /***********************
3344          * 3. Read REV register
3345          ***********************/
3346         priv->hw_base = pci_iomap(pdev, 0, 0);
3347         if (!priv->hw_base) {
3348                 err = -ENODEV;
3349                 goto out_pci_release_regions;
3350         }
3351
3352         IWL_DEBUG_INFO(priv, "pci_resource_len = 0x%08llx\n",
3353                 (unsigned long long) pci_resource_len(pdev, 0));
3354         IWL_DEBUG_INFO(priv, "pci_resource_base = %p\n", priv->hw_base);
3355
3356         iwl_hw_detect(priv);
3357         IWL_INFO(priv, "Detected Intel Wireless WiFi Link %s REV=0x%X\n",
3358                 priv->cfg->name, priv->hw_rev);
3359
3360         /* We disable the RETRY_TIMEOUT register (0x41) to keep
3361          * PCI Tx retries from interfering with C3 CPU state */
3362         pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
3363
3364         /* amp init */
3365         err = priv->cfg->ops->lib->apm_ops.init(priv);
3366         if (err < 0) {
3367                 IWL_ERR(priv, "Failed to init APMG\n");
3368                 goto out_iounmap;
3369         }
3370         /*****************
3371          * 4. Read EEPROM
3372          *****************/
3373         /* Read the EEPROM */
3374         err = iwl_eeprom_init(priv);
3375         if (err) {
3376                 IWL_ERR(priv, "Unable to init EEPROM\n");
3377                 goto out_iounmap;
3378         }
3379         err = iwl_eeprom_check_version(priv);
3380         if (err)
3381                 goto out_free_eeprom;
3382
3383         /* extract MAC Address */
3384         iwl_eeprom_get_mac(priv, priv->mac_addr);
3385         IWL_DEBUG_INFO(priv, "MAC address: %pM\n", priv->mac_addr);
3386         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
3387
3388         /************************
3389          * 5. Setup HW constants
3390          ************************/
3391         if (iwl_set_hw_params(priv)) {
3392                 IWL_ERR(priv, "failed to set hw parameters\n");
3393                 goto out_free_eeprom;
3394         }
3395
3396         /*******************
3397          * 6. Setup priv
3398          *******************/
3399
3400         err = iwl_init_drv(priv);
3401         if (err)
3402                 goto out_free_eeprom;
3403         /* At this point both hw and priv are initialized. */
3404
3405         /**********************************
3406          * 7. Initialize module parameters
3407          **********************************/
3408
3409         /* Disable radio (SW RF KILL) via parameter when loading driver */
3410         if (priv->cfg->mod_params->disable) {
3411                 set_bit(STATUS_RF_KILL_SW, &priv->status);
3412                 IWL_DEBUG_INFO(priv, "Radio disabled.\n");
3413         }
3414
3415         /********************
3416          * 8. Setup services
3417          ********************/
3418         spin_lock_irqsave(&priv->lock, flags);
3419         iwl_disable_interrupts(priv);
3420         spin_unlock_irqrestore(&priv->lock, flags);
3421
3422         pci_enable_msi(priv->pci_dev);
3423
3424         err = request_irq(priv->pci_dev->irq, iwl_isr, IRQF_SHARED,
3425                           DRV_NAME, priv);
3426         if (err) {
3427                 IWL_ERR(priv, "Error allocating IRQ %d\n", priv->pci_dev->irq);
3428                 goto out_disable_msi;
3429         }
3430         err = sysfs_create_group(&pdev->dev.kobj, &iwl_attribute_group);
3431         if (err) {
3432                 IWL_ERR(priv, "failed to create sysfs device attributes\n");
3433                 goto out_free_irq;
3434         }
3435
3436         iwl_setup_deferred_work(priv);
3437         iwl_setup_rx_handlers(priv);
3438
3439         /**********************************
3440          * 9. Setup and register mac80211
3441          **********************************/
3442
3443         /* enable interrupts if needed: hw bug w/a */
3444         pci_read_config_word(priv->pci_dev, PCI_COMMAND, &pci_cmd);
3445         if (pci_cmd & PCI_COMMAND_INTX_DISABLE) {
3446                 pci_cmd &= ~PCI_COMMAND_INTX_DISABLE;
3447                 pci_write_config_word(priv->pci_dev, PCI_COMMAND, pci_cmd);
3448         }
3449
3450         iwl_enable_interrupts(priv);
3451
3452         err = iwl_setup_mac(priv);
3453         if (err)
3454                 goto out_remove_sysfs;
3455
3456         err = iwl_dbgfs_register(priv, DRV_NAME);
3457         if (err)
3458                 IWL_ERR(priv, "failed to create debugfs files\n");
3459
3460         /* If platform's RF_KILL switch is NOT set to KILL */
3461         if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
3462                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
3463         else
3464                 set_bit(STATUS_RF_KILL_HW, &priv->status);
3465
3466         err = iwl_rfkill_init(priv);
3467         if (err)
3468                 IWL_ERR(priv, "Unable to initialize RFKILL system. "
3469                                   "Ignoring error: %d\n", err);
3470         else
3471                 iwl_rfkill_set_hw_state(priv);
3472
3473         iwl_power_initialize(priv);
3474         return 0;
3475
3476  out_remove_sysfs:
3477         destroy_workqueue(priv->workqueue);
3478         priv->workqueue = NULL;
3479         sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
3480  out_free_irq:
3481         free_irq(priv->pci_dev->irq, priv);
3482  out_disable_msi:
3483         pci_disable_msi(priv->pci_dev);
3484         iwl_uninit_drv(priv);
3485  out_free_eeprom:
3486         iwl_eeprom_free(priv);
3487  out_iounmap:
3488         pci_iounmap(pdev, priv->hw_base);
3489  out_pci_release_regions:
3490         pci_set_drvdata(pdev, NULL);
3491         pci_release_regions(pdev);
3492  out_pci_disable_device:
3493         pci_disable_device(pdev);
3494  out_ieee80211_free_hw:
3495         ieee80211_free_hw(priv->hw);
3496  out:
3497         return err;
3498 }
3499
3500 static void __devexit iwl_pci_remove(struct pci_dev *pdev)
3501 {
3502         struct iwl_priv *priv = pci_get_drvdata(pdev);
3503         unsigned long flags;
3504
3505         if (!priv)
3506                 return;
3507
3508         IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
3509
3510         iwl_dbgfs_unregister(priv);
3511         sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
3512
3513         /* ieee80211_unregister_hw call wil cause iwl_mac_stop to
3514          * to be called and iwl_down since we are removing the device
3515          * we need to set STATUS_EXIT_PENDING bit.
3516          */
3517         set_bit(STATUS_EXIT_PENDING, &priv->status);
3518         if (priv->mac80211_registered) {
3519                 ieee80211_unregister_hw(priv->hw);
3520                 priv->mac80211_registered = 0;
3521         } else {
3522                 iwl_down(priv);
3523         }
3524
3525         /* make sure we flush any pending irq or
3526          * tasklet for the driver
3527          */
3528         spin_lock_irqsave(&priv->lock, flags);
3529         iwl_disable_interrupts(priv);
3530         spin_unlock_irqrestore(&priv->lock, flags);
3531
3532         iwl_synchronize_irq(priv);
3533
3534         iwl_rfkill_unregister(priv);
3535         iwl_dealloc_ucode_pci(priv);
3536
3537         if (priv->rxq.bd)
3538                 iwl_rx_queue_free(priv, &priv->rxq);
3539         iwl_hw_txq_ctx_free(priv);
3540
3541         iwl_clear_stations_table(priv);
3542         iwl_eeprom_free(priv);
3543
3544
3545         /*netif_stop_queue(dev); */
3546         flush_workqueue(priv->workqueue);
3547
3548         /* ieee80211_unregister_hw calls iwl_mac_stop, which flushes
3549          * priv->workqueue... so we can't take down the workqueue
3550          * until now... */
3551         destroy_workqueue(priv->workqueue);
3552         priv->workqueue = NULL;
3553
3554         free_irq(priv->pci_dev->irq, priv);
3555         pci_disable_msi(priv->pci_dev);
3556         pci_iounmap(pdev, priv->hw_base);
3557         pci_release_regions(pdev);
3558         pci_disable_device(pdev);
3559         pci_set_drvdata(pdev, NULL);
3560
3561         iwl_uninit_drv(priv);
3562
3563         if (priv->ibss_beacon)
3564                 dev_kfree_skb(priv->ibss_beacon);
3565
3566         ieee80211_free_hw(priv->hw);
3567 }
3568
3569 #ifdef CONFIG_PM
3570
3571 static int iwl_pci_suspend(struct pci_dev *pdev, pm_message_t state)
3572 {
3573         struct iwl_priv *priv = pci_get_drvdata(pdev);
3574
3575         if (priv->is_open) {
3576                 set_bit(STATUS_IN_SUSPEND, &priv->status);
3577                 iwl_mac_stop(priv->hw);
3578                 priv->is_open = 1;
3579         }
3580
3581         pci_save_state(pdev);
3582         pci_disable_device(pdev);
3583         pci_set_power_state(pdev, PCI_D3hot);
3584
3585         return 0;
3586 }
3587
3588 static int iwl_pci_resume(struct pci_dev *pdev)
3589 {
3590         struct iwl_priv *priv = pci_get_drvdata(pdev);
3591         int ret;
3592
3593         pci_set_power_state(pdev, PCI_D0);
3594         ret = pci_enable_device(pdev);
3595         if (ret)
3596                 return ret;
3597         pci_restore_state(pdev);
3598         iwl_enable_interrupts(priv);
3599
3600         if (priv->is_open)
3601                 iwl_mac_start(priv->hw);
3602
3603         clear_bit(STATUS_IN_SUSPEND, &priv->status);
3604         return 0;
3605 }
3606
3607 #endif /* CONFIG_PM */
3608
3609 /*****************************************************************************
3610  *
3611  * driver and module entry point
3612  *
3613  *****************************************************************************/
3614
3615 /* Hardware specific file defines the PCI IDs table for that hardware module */
3616 static struct pci_device_id iwl_hw_card_ids[] = {
3617 #ifdef CONFIG_IWL4965
3618         {IWL_PCI_DEVICE(0x4229, PCI_ANY_ID, iwl4965_agn_cfg)},
3619         {IWL_PCI_DEVICE(0x4230, PCI_ANY_ID, iwl4965_agn_cfg)},
3620 #endif /* CONFIG_IWL4965 */
3621 #ifdef CONFIG_IWL5000
3622         {IWL_PCI_DEVICE(0x4232, 0x1205, iwl5100_bg_cfg)},
3623         {IWL_PCI_DEVICE(0x4232, 0x1305, iwl5100_bg_cfg)},
3624         {IWL_PCI_DEVICE(0x4232, 0x1206, iwl5100_abg_cfg)},
3625         {IWL_PCI_DEVICE(0x4232, 0x1306, iwl5100_abg_cfg)},
3626         {IWL_PCI_DEVICE(0x4232, 0x1326, iwl5100_abg_cfg)},
3627         {IWL_PCI_DEVICE(0x4237, 0x1216, iwl5100_abg_cfg)},
3628         {IWL_PCI_DEVICE(0x4232, PCI_ANY_ID, iwl5100_agn_cfg)},
3629         {IWL_PCI_DEVICE(0x4235, PCI_ANY_ID, iwl5300_agn_cfg)},
3630         {IWL_PCI_DEVICE(0x4236, PCI_ANY_ID, iwl5300_agn_cfg)},
3631         {IWL_PCI_DEVICE(0x4237, PCI_ANY_ID, iwl5100_agn_cfg)},
3632 /* 5350 WiFi/WiMax */
3633         {IWL_PCI_DEVICE(0x423A, 0x1001, iwl5350_agn_cfg)},
3634         {IWL_PCI_DEVICE(0x423A, 0x1021, iwl5350_agn_cfg)},
3635         {IWL_PCI_DEVICE(0x423B, 0x1011, iwl5350_agn_cfg)},
3636 /* 5150 Wifi/WiMax */
3637         {IWL_PCI_DEVICE(0x423C, PCI_ANY_ID, iwl5150_agn_cfg)},
3638         {IWL_PCI_DEVICE(0x423D, PCI_ANY_ID, iwl5150_agn_cfg)},
3639 /* 6000/6050 Series */
3640         {IWL_PCI_DEVICE(0x0082, 0x1102, iwl6000_2ag_cfg)},
3641         {IWL_PCI_DEVICE(0x0085, 0x1112, iwl6000_2ag_cfg)},
3642         {IWL_PCI_DEVICE(0x0082, 0x1122, iwl6000_2ag_cfg)},
3643         {IWL_PCI_DEVICE(0x422B, PCI_ANY_ID, iwl6000_3agn_cfg)},
3644         {IWL_PCI_DEVICE(0x4238, PCI_ANY_ID, iwl6000_3agn_cfg)},
3645         {IWL_PCI_DEVICE(0x0082, PCI_ANY_ID, iwl6000_2agn_cfg)},
3646         {IWL_PCI_DEVICE(0x0085, PCI_ANY_ID, iwl6000_3agn_cfg)},
3647         {IWL_PCI_DEVICE(0x0086, PCI_ANY_ID, iwl6050_3agn_cfg)},
3648         {IWL_PCI_DEVICE(0x0087, PCI_ANY_ID, iwl6050_2agn_cfg)},
3649         {IWL_PCI_DEVICE(0x0088, PCI_ANY_ID, iwl6050_3agn_cfg)},
3650         {IWL_PCI_DEVICE(0x0089, PCI_ANY_ID, iwl6050_2agn_cfg)},
3651 /* 1000 Series WiFi */
3652         {IWL_PCI_DEVICE(0x0083, PCI_ANY_ID, iwl1000_bgn_cfg)},
3653         {IWL_PCI_DEVICE(0x0084, PCI_ANY_ID, iwl1000_bgn_cfg)},
3654 #endif /* CONFIG_IWL5000 */
3655
3656         {0}
3657 };
3658 MODULE_DEVICE_TABLE(pci, iwl_hw_card_ids);
3659
3660 static struct pci_driver iwl_driver = {
3661         .name = DRV_NAME,
3662         .id_table = iwl_hw_card_ids,
3663         .probe = iwl_pci_probe,
3664         .remove = __devexit_p(iwl_pci_remove),
3665 #ifdef CONFIG_PM
3666         .suspend = iwl_pci_suspend,
3667         .resume = iwl_pci_resume,
3668 #endif
3669 };
3670
3671 static int __init iwl_init(void)
3672 {
3673
3674         int ret;
3675         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
3676         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
3677
3678         ret = iwlagn_rate_control_register();
3679         if (ret) {
3680                 printk(KERN_ERR DRV_NAME
3681                        "Unable to register rate control algorithm: %d\n", ret);
3682                 return ret;
3683         }
3684
3685         ret = pci_register_driver(&iwl_driver);
3686         if (ret) {
3687                 printk(KERN_ERR DRV_NAME "Unable to initialize PCI module\n");
3688                 goto error_register;
3689         }
3690
3691         return ret;
3692
3693 error_register:
3694         iwlagn_rate_control_unregister();
3695         return ret;
3696 }
3697
3698 static void __exit iwl_exit(void)
3699 {
3700         pci_unregister_driver(&iwl_driver);
3701         iwlagn_rate_control_unregister();
3702 }
3703
3704 module_exit(iwl_exit);
3705 module_init(iwl_init);