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 /*
 605  * QoS  support
 606 */
 607 static void iwl_activate_qos(struct iwl_priv *priv, u8 force)
 608 {
 609         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 610                 return;
 611
 612         priv->qos_data.def_qos_parm.qos_flags = 0;
 613
 614         if (priv->qos_data.qos_cap.q_AP.queue_request &&
 615             !priv->qos_data.qos_cap.q_AP.txop_request)
 616                 priv->qos_data.def_qos_parm.qos_flags |=
 617                         QOS_PARAM_FLG_TXOP_TYPE_MSK;
 618         if (priv->qos_data.qos_active)
 619                 priv->qos_data.def_qos_parm.qos_flags |=
 620                         QOS_PARAM_FLG_UPDATE_EDCA_MSK;
 621
 622         if (priv->current_ht_config.is_ht)
 623                 priv->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
 624
 625         if (force || iwl_is_associated(priv)) {
 626                 IWL_DEBUG_QOS(priv, "send QoS cmd with Qos active=%d FLAGS=0x%X\n",
 627                                 priv->qos_data.qos_active,
 628                                 priv->qos_data.def_qos_parm.qos_flags);
 629
 630                 iwl_send_cmd_pdu_async(priv, REPLY_QOS_PARAM,
 631                                        sizeof(struct iwl_qosparam_cmd),
 632                                        &priv->qos_data.def_qos_parm, NULL);
 633         }
 634 }
 635
 636 #define MAX_UCODE_BEACON_INTERVAL       4096
 637
 638 static u16 iwl_adjust_beacon_interval(u16 beacon_val)
 639 {
 640         u16 new_val = 0;
 641         u16 beacon_factor = 0;
 642
 643         beacon_factor = (beacon_val + MAX_UCODE_BEACON_INTERVAL)
 644                                         / MAX_UCODE_BEACON_INTERVAL;
 645         new_val = beacon_val / beacon_factor;
 646
 647         if (!new_val)
 648                 new_val = MAX_UCODE_BEACON_INTERVAL;
 649
 650         return new_val;
 651 }
 652
 653 static void iwl_setup_rxon_timing(struct iwl_priv *priv)
 654 {
 655         u64 tsf;
 656         s32 interval_tm, rem;
 657         unsigned long flags;
 658         struct ieee80211_conf *conf = NULL;
 659         u16 beacon_int = 0;
 660
 661         conf = ieee80211_get_hw_conf(priv->hw);
 662
 663         spin_lock_irqsave(&priv->lock, flags);
 664         priv->rxon_timing.timestamp = cpu_to_le64(priv->timestamp);
 665         priv->rxon_timing.listen_interval = cpu_to_le16(conf->listen_interval);
 666
 667         if (priv->iw_mode == NL80211_IFTYPE_STATION) {
 668                 beacon_int = iwl_adjust_beacon_interval(priv->beacon_int);
 669                 priv->rxon_timing.atim_window = 0;
 670         } else {
 671                 beacon_int = iwl_adjust_beacon_interval(conf->beacon_int);
 672
 673                 /* TODO: we need to get atim_window from upper stack
 674                  * for now we set to 0 */
 675                 priv->rxon_timing.atim_window = 0;
 676         }
 677
 678         priv->rxon_timing.beacon_interval = cpu_to_le16(beacon_int);
 679
 680         tsf = priv->timestamp; /* tsf is modifed by do_div: copy it */
 681         interval_tm = beacon_int * 1024;
 682         rem = do_div(tsf, interval_tm);
 683         priv->rxon_timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
 684
 685         spin_unlock_irqrestore(&priv->lock, flags);
 686         IWL_DEBUG_ASSOC(priv, "beacon interval %d beacon timer %d beacon tim %d\n",
 687                         le16_to_cpu(priv->rxon_timing.beacon_interval),
 688                         le32_to_cpu(priv->rxon_timing.beacon_init_val),
 689                         le16_to_cpu(priv->rxon_timing.atim_window));
 690 }
 691
 692 static int iwl_set_mode(struct iwl_priv *priv, int mode)
 693 {
 694         iwl_connection_init_rx_config(priv, mode);
 695         iwl_set_rxon_chain(priv);
 696         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
 697
 698         iwl_clear_stations_table(priv);
 699
 700         /* dont commit rxon if rf-kill is on*/
 701         if (!iwl_is_ready_rf(priv))
 702                 return -EAGAIN;
 703
 704         cancel_delayed_work(&priv->scan_check);
 705         if (iwl_scan_cancel_timeout(priv, 100)) {
 706                 IWL_WARN(priv, "Aborted scan still in progress after 100ms\n");
 707                 IWL_DEBUG_MAC80211(priv, "leaving - scan abort failed.\n");
 708                 return -EAGAIN;
 709         }
 710
 711         iwl_commit_rxon(priv);
 712
 713         return 0;
 714 }
 715
 716 /******************************************************************************
 717  *
 718  * Generic RX handler implementations
 719  *
 720  ******************************************************************************/
 721 static void iwl_rx_reply_alive(struct iwl_priv *priv,
 722                                 struct iwl_rx_mem_buffer *rxb)
 723 {
 724         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
 725         struct iwl_alive_resp *palive;
 726         struct delayed_work *pwork;
 727
 728         palive = &pkt->u.alive_frame;
 729
 730         IWL_DEBUG_INFO(priv, "Alive ucode status 0x%08X revision "
 731                        "0x%01X 0x%01X\n",
 732                        palive->is_valid, palive->ver_type,
 733                        palive->ver_subtype);
 734
 735         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
 736                 IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
 737                 memcpy(&priv->card_alive_init,
 738                        &pkt->u.alive_frame,
 739                        sizeof(struct iwl_init_alive_resp));
 740                 pwork = &priv->init_alive_start;
 741         } else {
 742                 IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
 743                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
 744                        sizeof(struct iwl_alive_resp));
 745                 pwork = &priv->alive_start;
 746         }
 747
 748         /* We delay the ALIVE response by 5ms to
 749          * give the HW RF Kill time to activate... */
 750         if (palive->is_valid == UCODE_VALID_OK)
 751                 queue_delayed_work(priv->workqueue, pwork,
 752                                    msecs_to_jiffies(5));
 753         else
 754                 IWL_WARN(priv, "uCode did not respond OK.\n");
 755 }
 756
 757 static void iwl_bg_beacon_update(struct work_struct *work)
 758 {
 759         struct iwl_priv *priv =
 760                 container_of(work, struct iwl_priv, beacon_update);
 761         struct sk_buff *beacon;
 762
 763         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
 764         beacon = ieee80211_beacon_get(priv->hw, priv->vif);
 765
 766         if (!beacon) {
 767                 IWL_ERR(priv, "update beacon failed\n");
 768                 return;
 769         }
 770
 771         mutex_lock(&priv->mutex);
 772         /* new beacon skb is allocated every time; dispose previous.*/
 773         if (priv->ibss_beacon)
 774                 dev_kfree_skb(priv->ibss_beacon);
 775
 776         priv->ibss_beacon = beacon;
 777         mutex_unlock(&priv->mutex);
 778
 779         iwl_send_beacon_cmd(priv);
 780 }
 781
 782 /**
 783  * iwl_bg_statistics_periodic - Timer callback to queue statistics
 784  *
 785  * This callback is provided in order to send a statistics request.
 786  *
 787  * This timer function is continually reset to execute within
 788  * REG_RECALIB_PERIOD seconds since the last STATISTICS_NOTIFICATION
 789  * was received.  We need to ensure we receive the statistics in order
 790  * to update the temperature used for calibrating the TXPOWER.
 791  */
 792 static void iwl_bg_statistics_periodic(unsigned long data)
 793 {
 794         struct iwl_priv *priv = (struct iwl_priv *)data;
 795
 796         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 797                 return;
 798
 799         /* dont send host command if rf-kill is on */
 800         if (!iwl_is_ready_rf(priv))
 801                 return;
 802
 803         iwl_send_statistics_request(priv, CMD_ASYNC);
 804 }
 805
 806 static void iwl_rx_beacon_notif(struct iwl_priv *priv,
 807                                 struct iwl_rx_mem_buffer *rxb)
 808 {
 809 #ifdef CONFIG_IWLWIFI_DEBUG
 810         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
 811         struct iwl4965_beacon_notif *beacon =
 812                 (struct iwl4965_beacon_notif *)pkt->u.raw;
 813         u8 rate = iwl_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
 814
 815         IWL_DEBUG_RX(priv, "beacon status %x retries %d iss %d "
 816                 "tsf %d %d rate %d\n",
 817                 le32_to_cpu(beacon->beacon_notify_hdr.u.status) & TX_STATUS_MSK,
 818                 beacon->beacon_notify_hdr.failure_frame,
 819                 le32_to_cpu(beacon->ibss_mgr_status),
 820                 le32_to_cpu(beacon->high_tsf),
 821                 le32_to_cpu(beacon->low_tsf), rate);
 822 #endif
 823
 824         if ((priv->iw_mode == NL80211_IFTYPE_AP) &&
 825             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
 826                 queue_work(priv->workqueue, &priv->beacon_update);
 827 }
 828
 829 /* Handle notification from uCode that card's power state is changing
 830  * due to software, hardware, or critical temperature RFKILL */
 831 static void iwl_rx_card_state_notif(struct iwl_priv *priv,
 832                                     struct iwl_rx_mem_buffer *rxb)
 833 {
 834         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
 835         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
 836         unsigned long status = priv->status;
 837
 838         IWL_DEBUG_RF_KILL(priv, "Card state received: HW:%s SW:%s\n",
 839                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
 840                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
 841
 842         if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED |
 843                      RF_CARD_DISABLED)) {
 844
 845                 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
 846                             CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
 847
 848                 if (!iwl_grab_nic_access(priv)) {
 849                         iwl_write_direct32(
 850                                 priv, HBUS_TARG_MBX_C,
 851                                 HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
 852
 853                         iwl_release_nic_access(priv);
 854                 }
 855
 856                 if (!(flags & RXON_CARD_DISABLED)) {
 857                         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
 858                                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
 859                         if (!iwl_grab_nic_access(priv)) {
 860                                 iwl_write_direct32(
 861                                         priv, HBUS_TARG_MBX_C,
 862                                         HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
 863
 864                                 iwl_release_nic_access(priv);
 865                         }
 866                 }
 867
 868                 if (flags & RF_CARD_DISABLED) {
 869                         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
 870                                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
 871                         iwl_read32(priv, CSR_UCODE_DRV_GP1);
 872                         if (!iwl_grab_nic_access(priv))
 873                                 iwl_release_nic_access(priv);
 874                 }
 875         }
 876
 877         if (flags & HW_CARD_DISABLED)
 878                 set_bit(STATUS_RF_KILL_HW, &priv->status);
 879         else
 880                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
 881
 882
 883         if (flags & SW_CARD_DISABLED)
 884                 set_bit(STATUS_RF_KILL_SW, &priv->status);
 885         else
 886                 clear_bit(STATUS_RF_KILL_SW, &priv->status);
 887
 888         if (!(flags & RXON_CARD_DISABLED))
 889                 iwl_scan_cancel(priv);
 890
 891         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
 892              test_bit(STATUS_RF_KILL_HW, &priv->status)) ||
 893             (test_bit(STATUS_RF_KILL_SW, &status) !=
 894              test_bit(STATUS_RF_KILL_SW, &priv->status)))
 895                 queue_work(priv->workqueue, &priv->rf_kill);
 896         else
 897                 wake_up_interruptible(&priv->wait_command_queue);
 898 }
 899
 900 int iwl_set_pwr_src(struct iwl_priv *priv, enum iwl_pwr_src src)
 901 {
 902         int ret;
 903         unsigned long flags;
 904
 905         spin_lock_irqsave(&priv->lock, flags);
 906         ret = iwl_grab_nic_access(priv);
 907         if (ret)
 908                 goto err;
 909
 910         if (src == IWL_PWR_SRC_VAUX) {
 911                 if (pci_pme_capable(priv->pci_dev, PCI_D3cold))
 912                         iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
 913                                                APMG_PS_CTRL_VAL_PWR_SRC_VAUX,
 914                                                ~APMG_PS_CTRL_MSK_PWR_SRC);
 915         } else {
 916                 iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
 917                                        APMG_PS_CTRL_VAL_PWR_SRC_VMAIN,
 918                                        ~APMG_PS_CTRL_MSK_PWR_SRC);
 919         }
 920
 921         iwl_release_nic_access(priv);
 922 err:
 923         spin_unlock_irqrestore(&priv->lock, flags);
 924         return ret;
 925 }
 926
 927 /**
 928  * iwl_setup_rx_handlers - Initialize Rx handler callbacks
 929  *
 930  * Setup the RX handlers for each of the reply types sent from the uCode
 931  * to the host.
 932  *
 933  * This function chains into the hardware specific files for them to setup
 934  * any hardware specific handlers as well.
 935  */
 936 static void iwl_setup_rx_handlers(struct iwl_priv *priv)
 937 {
 938         priv->rx_handlers[REPLY_ALIVE] = iwl_rx_reply_alive;
 939         priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error;
 940         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
 941         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif;
 942         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
 943             iwl_rx_pm_debug_statistics_notif;
 944         priv->rx_handlers[BEACON_NOTIFICATION] = iwl_rx_beacon_notif;
 945
 946         /*
 947          * The same handler is used for both the REPLY to a discrete
 948          * statistics request from the host as well as for the periodic
 949          * statistics notifications (after received beacons) from the uCode.
 950          */
 951         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl_rx_statistics;
 952         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl_rx_statistics;
 953
 954         iwl_setup_spectrum_handlers(priv);
 955         iwl_setup_rx_scan_handlers(priv);
 956
 957         /* status change handler */
 958         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl_rx_card_state_notif;
 959
 960         priv->rx_handlers[MISSED_BEACONS_NOTIFICATION] =
 961             iwl_rx_missed_beacon_notif;
 962         /* Rx handlers */
 963         priv->rx_handlers[REPLY_RX_PHY_CMD] = iwl_rx_reply_rx_phy;
 964         priv->rx_handlers[REPLY_RX_MPDU_CMD] = iwl_rx_reply_rx;
 965         /* block ack */
 966         priv->rx_handlers[REPLY_COMPRESSED_BA] = iwl_rx_reply_compressed_ba;
 967         /* Set up hardware specific Rx handlers */
 968         priv->cfg->ops->lib->rx_handler_setup(priv);
 969 }
 970
 971 /**
 972  * iwl_rx_handle - Main entry function for receiving responses from uCode
 973  *
 974  * Uses the priv->rx_handlers callback function array to invoke
 975  * the appropriate handlers, including command responses,
 976  * frame-received notifications, and other notifications.
 977  */
 978 void iwl_rx_handle(struct iwl_priv *priv)
 979 {
 980         struct iwl_rx_mem_buffer *rxb;
 981         struct iwl_rx_packet *pkt;
 982         struct iwl_rx_queue *rxq = &priv->rxq;
 983         u32 r, i;
 984         int reclaim;
 985         unsigned long flags;
 986         u8 fill_rx = 0;
 987         u32 count = 8;
 988
 989         /* uCode's read index (stored in shared DRAM) indicates the last Rx
 990          * buffer that the driver may process (last buffer filled by ucode). */
 991         r = le16_to_cpu(rxq->rb_stts->closed_rb_num) &  0x0FFF;
 992         i = rxq->read;
 993
 994         /* Rx interrupt, but nothing sent from uCode */
 995         if (i == r)
 996                 IWL_DEBUG_RX(priv, "r = %d, i = %d\n", r, i);
 997
 998         if (iwl_rx_queue_space(rxq) > (RX_QUEUE_SIZE / 2))
 999                 fill_rx = 1;
1000
1001         while (i != r) {
1002                 rxb = rxq->queue[i];
1003
1004                 /* If an RXB doesn't have a Rx queue slot associated with it,
1005                  * then a bug has been introduced in the queue refilling
1006                  * routines -- catch it here */
1007                 BUG_ON(rxb == NULL);
1008
1009                 rxq->queue[i] = NULL;
1010
1011                 dma_sync_single_range_for_cpu(
1012                                 &priv->pci_dev->dev, rxb->real_dma_addr,
1013                                 rxb->aligned_dma_addr - rxb->real_dma_addr,
1014                                 priv->hw_params.rx_buf_size,
1015                                 PCI_DMA_FROMDEVICE);
1016                 pkt = (struct iwl_rx_packet *)rxb->skb->data;
1017
1018                 /* Reclaim a command buffer only if this packet is a response
1019                  *   to a (driver-originated) command.
1020                  * If the packet (e.g. Rx frame) originated from uCode,
1021                  *   there is no command buffer to reclaim.
1022                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
1023                  *   but apparently a few don't get set; catch them here. */
1024                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
1025                         (pkt->hdr.cmd != REPLY_RX_PHY_CMD) &&
1026                         (pkt->hdr.cmd != REPLY_RX) &&
1027                         (pkt->hdr.cmd != REPLY_RX_MPDU_CMD) &&
1028                         (pkt->hdr.cmd != REPLY_COMPRESSED_BA) &&
1029                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
1030                         (pkt->hdr.cmd != REPLY_TX);
1031
1032                 /* Based on type of command response or notification,
1033                  *   handle those that need handling via function in
1034                  *   rx_handlers table.  See iwl_setup_rx_handlers() */
1035                 if (priv->rx_handlers[pkt->hdr.cmd]) {
1036                         IWL_DEBUG_RX(priv, "r = %d, i = %d, %s, 0x%02x\n", r,
1037                                 i, get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
1038                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
1039                 } else {
1040                         /* No handling needed */
1041                         IWL_DEBUG_RX(priv,
1042                                 "r %d i %d No handler needed for %s, 0x%02x\n",
1043                                 r, i, get_cmd_string(pkt->hdr.cmd),
1044                                 pkt->hdr.cmd);
1045                 }
1046
1047                 if (reclaim) {
1048                         /* Invoke any callbacks, transfer the skb to caller, and
1049                          * fire off the (possibly) blocking iwl_send_cmd()
1050                          * as we reclaim the driver command queue */
1051                         if (rxb && rxb->skb)
1052                                 iwl_tx_cmd_complete(priv, rxb);
1053                         else
1054                                 IWL_WARN(priv, "Claim null rxb?\n");
1055                 }
1056
1057                 /* For now we just don't re-use anything.  We can tweak this
1058                  * later to try and re-use notification packets and SKBs that
1059                  * fail to Rx correctly */
1060                 if (rxb->skb != NULL) {
1061                         priv->alloc_rxb_skb--;
1062                         dev_kfree_skb_any(rxb->skb);
1063                         rxb->skb = NULL;
1064                 }
1065
1066                 pci_unmap_single(priv->pci_dev, rxb->real_dma_addr,
1067                                  priv->hw_params.rx_buf_size + 256,
1068                                  PCI_DMA_FROMDEVICE);
1069                 spin_lock_irqsave(&rxq->lock, flags);
1070                 list_add_tail(&rxb->list, &priv->rxq.rx_used);
1071                 spin_unlock_irqrestore(&rxq->lock, flags);
1072                 i = (i + 1) & RX_QUEUE_MASK;
1073                 /* If there are a lot of unused frames,
1074                  * restock the Rx queue so ucode wont assert. */
1075                 if (fill_rx) {
1076                         count++;
1077                         if (count >= 8) {
1078                                 priv->rxq.read = i;
1079                                 iwl_rx_queue_restock(priv);
1080                                 count = 0;
1081                         }
1082                 }
1083         }
1084
1085         /* Backtrack one entry */
1086         priv->rxq.read = i;
1087         iwl_rx_queue_restock(priv);
1088 }
1089
1090 /* call this function to flush any scheduled tasklet */
1091 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
1092 {
1093         /* wait to make sure we flush pending tasklet*/
1094         synchronize_irq(priv->pci_dev->irq);
1095         tasklet_kill(&priv->irq_tasklet);
1096 }
1097
1098 static void iwl_error_recovery(struct iwl_priv *priv)
1099 {
1100         unsigned long flags;
1101
1102         memcpy(&priv->staging_rxon, &priv->recovery_rxon,
1103                sizeof(priv->staging_rxon));
1104         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1105         iwl_commit_rxon(priv);
1106
1107         iwl_rxon_add_station(priv, priv->bssid, 1);
1108
1109         spin_lock_irqsave(&priv->lock, flags);
1110         priv->assoc_id = le16_to_cpu(priv->staging_rxon.assoc_id);
1111         priv->error_recovering = 0;
1112         spin_unlock_irqrestore(&priv->lock, flags);
1113 }
1114
1115 static void iwl_irq_tasklet(struct iwl_priv *priv)
1116 {
1117         u32 inta, handled = 0;
1118         u32 inta_fh;
1119         unsigned long flags;
1120 #ifdef CONFIG_IWLWIFI_DEBUG
1121         u32 inta_mask;
1122 #endif
1123
1124         spin_lock_irqsave(&priv->lock, flags);
1125
1126         /* Ack/clear/reset pending uCode interrupts.
1127          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
1128          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
1129         inta = iwl_read32(priv, CSR_INT);
1130         iwl_write32(priv, CSR_INT, inta);
1131
1132         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
1133          * Any new interrupts that happen after this, either while we're
1134          * in this tasklet, or later, will show up in next ISR/tasklet. */
1135         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1136         iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
1137
1138 #ifdef CONFIG_IWLWIFI_DEBUG
1139         if (priv->debug_level & IWL_DL_ISR) {
1140                 /* just for debug */
1141                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1142                 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1143                               inta, inta_mask, inta_fh);
1144         }
1145 #endif
1146
1147         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
1148          * atomic, make sure that inta covers all the interrupts that
1149          * we've discovered, even if FH interrupt came in just after
1150          * reading CSR_INT. */
1151         if (inta_fh & CSR49_FH_INT_RX_MASK)
1152                 inta |= CSR_INT_BIT_FH_RX;
1153         if (inta_fh & CSR49_FH_INT_TX_MASK)
1154                 inta |= CSR_INT_BIT_FH_TX;
1155
1156         /* Now service all interrupt bits discovered above. */
1157         if (inta & CSR_INT_BIT_HW_ERR) {
1158                 IWL_ERR(priv, "Microcode HW error detected.  Restarting.\n");
1159
1160                 /* Tell the device to stop sending interrupts */
1161                 iwl_disable_interrupts(priv);
1162
1163                 iwl_irq_handle_error(priv);
1164
1165                 handled |= CSR_INT_BIT_HW_ERR;
1166
1167                 spin_unlock_irqrestore(&priv->lock, flags);
1168
1169                 return;
1170         }
1171
1172 #ifdef CONFIG_IWLWIFI_DEBUG
1173         if (priv->debug_level & (IWL_DL_ISR)) {
1174                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1175                 if (inta & CSR_INT_BIT_SCD)
1176                         IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
1177                                       "the frame/frames.\n");
1178
1179                 /* Alive notification via Rx interrupt will do the real work */
1180                 if (inta & CSR_INT_BIT_ALIVE)
1181                         IWL_DEBUG_ISR(priv, "Alive interrupt\n");
1182         }
1183 #endif
1184         /* Safely ignore these bits for debug checks below */
1185         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1186
1187         /* HW RF KILL switch toggled */
1188         if (inta & CSR_INT_BIT_RF_KILL) {
1189                 int hw_rf_kill = 0;
1190                 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
1191                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
1192                         hw_rf_kill = 1;
1193
1194                 IWL_DEBUG_RF_KILL(priv, "RF_KILL bit toggled to %s.\n",
1195                                 hw_rf_kill ? "disable radio" : "enable radio");
1196
1197                 /* driver only loads ucode once setting the interface up.
1198                  * the driver allows loading the ucode even if the radio
1199                  * is killed. Hence update the killswitch state here. The
1200                  * rfkill handler will care about restarting if needed.
1201                  */
1202                 if (!test_bit(STATUS_ALIVE, &priv->status)) {
1203                         if (hw_rf_kill)
1204                                 set_bit(STATUS_RF_KILL_HW, &priv->status);
1205                         else
1206                                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
1207                         queue_work(priv->workqueue, &priv->rf_kill);
1208                 }
1209
1210                 handled |= CSR_INT_BIT_RF_KILL;
1211         }
1212
1213         /* Chip got too hot and stopped itself */
1214         if (inta & CSR_INT_BIT_CT_KILL) {
1215                 IWL_ERR(priv, "Microcode CT kill error detected.\n");
1216                 handled |= CSR_INT_BIT_CT_KILL;
1217         }
1218
1219         /* Error detected by uCode */
1220         if (inta & CSR_INT_BIT_SW_ERR) {
1221                 IWL_ERR(priv, "Microcode SW error detected. "
1222                         " Restarting 0x%X.\n", inta);
1223                 iwl_irq_handle_error(priv);
1224                 handled |= CSR_INT_BIT_SW_ERR;
1225         }
1226
1227         /* uCode wakes up after power-down sleep */
1228         if (inta & CSR_INT_BIT_WAKEUP) {
1229                 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
1230                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
1231                 iwl_txq_update_write_ptr(priv, &priv->txq[0]);
1232                 iwl_txq_update_write_ptr(priv, &priv->txq[1]);
1233                 iwl_txq_update_write_ptr(priv, &priv->txq[2]);
1234                 iwl_txq_update_write_ptr(priv, &priv->txq[3]);
1235                 iwl_txq_update_write_ptr(priv, &priv->txq[4]);
1236                 iwl_txq_update_write_ptr(priv, &priv->txq[5]);
1237
1238                 handled |= CSR_INT_BIT_WAKEUP;
1239         }
1240
1241         /* All uCode command responses, including Tx command responses,
1242          * Rx "responses" (frame-received notification), and other
1243          * notifications from uCode come through here*/
1244         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1245                 iwl_rx_handle(priv);
1246                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1247         }
1248
1249         if (inta & CSR_INT_BIT_FH_TX) {
1250                 IWL_DEBUG_ISR(priv, "Tx interrupt\n");
1251                 handled |= CSR_INT_BIT_FH_TX;
1252                 /* FH finished to write, send event */
1253                 priv->ucode_write_complete = 1;
1254                 wake_up_interruptible(&priv->wait_command_queue);
1255         }
1256
1257         if (inta & ~handled)
1258                 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
1259
1260         if (inta & ~CSR_INI_SET_MASK) {
1261                 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
1262                          inta & ~CSR_INI_SET_MASK);
1263                 IWL_WARN(priv, "   with FH_INT = 0x%08x\n", inta_fh);
1264         }
1265
1266         /* Re-enable all interrupts */
1267         /* only Re-enable if diabled by irq */
1268         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1269                 iwl_enable_interrupts(priv);
1270
1271 #ifdef CONFIG_IWLWIFI_DEBUG
1272         if (priv->debug_level & (IWL_DL_ISR)) {
1273                 inta = iwl_read32(priv, CSR_INT);
1274                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1275                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1276                 IWL_DEBUG_ISR(priv, "End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
1277                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
1278         }
1279 #endif
1280         spin_unlock_irqrestore(&priv->lock, flags);
1281 }
1282
1283 /******************************************************************************
1284  *
1285  * uCode download functions
1286  *
1287  ******************************************************************************/
1288
1289 static void iwl_dealloc_ucode_pci(struct iwl_priv *priv)
1290 {
1291         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
1292         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
1293         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1294         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
1295         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1296         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
1297 }
1298
1299 static void iwl_nic_start(struct iwl_priv *priv)
1300 {
1301         /* Remove all resets to allow NIC to operate */
1302         iwl_write32(priv, CSR_RESET, 0);
1303 }
1304
1305
1306 /**
1307  * iwl_read_ucode - Read uCode images from disk file.
1308  *
1309  * Copy into buffers for card to fetch via bus-mastering
1310  */
1311 static int iwl_read_ucode(struct iwl_priv *priv)
1312 {
1313         struct iwl_ucode *ucode;
1314         int ret = -EINVAL, index;
1315         const struct firmware *ucode_raw;
1316         const char *name_pre = priv->cfg->fw_name_pre;
1317         const unsigned int api_max = priv->cfg->ucode_api_max;
1318         const unsigned int api_min = priv->cfg->ucode_api_min;
1319         char buf[25];
1320         u8 *src;
1321         size_t len;
1322         u32 api_ver, inst_size, data_size, init_size, init_data_size, boot_size;
1323
1324         /* Ask kernel firmware_class module to get the boot firmware off disk.
1325          * request_firmware() is synchronous, file is in memory on return. */
1326         for (index = api_max; index >= api_min; index--) {
1327                 sprintf(buf, "%s%d%s", name_pre, index, ".ucode");
1328                 ret = request_firmware(&ucode_raw, buf, &priv->pci_dev->dev);
1329                 if (ret < 0) {
1330                         IWL_ERR(priv, "%s firmware file req failed: %d\n",
1331                                   buf, ret);
1332                         if (ret == -ENOENT)
1333                                 continue;
1334                         else
1335                                 goto error;
1336                 } else {
1337                         if (index < api_max)
1338                                 IWL_ERR(priv, "Loaded firmware %s, "
1339                                         "which is deprecated. "
1340                                         "Please use API v%u instead.\n",
1341                                           buf, api_max);
1342
1343                         IWL_DEBUG_INFO(priv, "Got firmware '%s' file (%zd bytes) from disk\n",
1344                                        buf, ucode_raw->size);
1345                         break;
1346                 }
1347         }
1348
1349         if (ret < 0)
1350                 goto error;
1351
1352         /* Make sure that we got at least our header! */
1353         if (ucode_raw->size < sizeof(*ucode)) {
1354                 IWL_ERR(priv, "File size way too small!\n");
1355                 ret = -EINVAL;
1356                 goto err_release;
1357         }
1358
1359         /* Data from ucode file:  header followed by uCode images */
1360         ucode = (void *)ucode_raw->data;
1361
1362         priv->ucode_ver = le32_to_cpu(ucode->ver);
1363         api_ver = IWL_UCODE_API(priv->ucode_ver);
1364         inst_size = le32_to_cpu(ucode->inst_size);
1365         data_size = le32_to_cpu(ucode->data_size);
1366         init_size = le32_to_cpu(ucode->init_size);
1367         init_data_size = le32_to_cpu(ucode->init_data_size);
1368         boot_size = le32_to_cpu(ucode->boot_size);
1369
1370         /* api_ver should match the api version forming part of the
1371          * firmware filename ... but we don't check for that and only rely
1372          * on the API version read from firware header from here on forward */
1373
1374         if (api_ver < api_min || api_ver > api_max) {
1375                 IWL_ERR(priv, "Driver unable to support your firmware API. "
1376                           "Driver supports v%u, firmware is v%u.\n",
1377                           api_max, api_ver);
1378                 priv->ucode_ver = 0;
1379                 ret = -EINVAL;
1380                 goto err_release;
1381         }
1382         if (api_ver != api_max)
1383                 IWL_ERR(priv, "Firmware has old API version. Expected v%u, "
1384                           "got v%u. New firmware can be obtained "
1385                           "from http://www.intellinuxwireless.org.\n",
1386                           api_max, api_ver);
1387
1388         IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u\n",
1389                IWL_UCODE_MAJOR(priv->ucode_ver),
1390                IWL_UCODE_MINOR(priv->ucode_ver),
1391                IWL_UCODE_API(priv->ucode_ver),
1392                IWL_UCODE_SERIAL(priv->ucode_ver));
1393
1394         IWL_DEBUG_INFO(priv, "f/w package hdr ucode version raw = 0x%x\n",
1395                        priv->ucode_ver);
1396         IWL_DEBUG_INFO(priv, "f/w package hdr runtime inst size = %u\n",
1397                        inst_size);
1398         IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %u\n",
1399                        data_size);
1400         IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %u\n",
1401                        init_size);
1402         IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %u\n",
1403                        init_data_size);
1404         IWL_DEBUG_INFO(priv, "f/w package hdr boot inst size = %u\n",
1405                        boot_size);
1406
1407         /* Verify size of file vs. image size info in file's header */
1408         if (ucode_raw->size < sizeof(*ucode) +
1409                 inst_size + data_size + init_size +
1410                 init_data_size + boot_size) {
1411
1412                 IWL_DEBUG_INFO(priv, "uCode file size %d too small\n",
1413                                (int)ucode_raw->size);
1414                 ret = -EINVAL;
1415                 goto err_release;
1416         }
1417
1418         /* Verify that uCode images will fit in card's SRAM */
1419         if (inst_size > priv->hw_params.max_inst_size) {
1420                 IWL_DEBUG_INFO(priv, "uCode instr len %d too large to fit in\n",
1421                                inst_size);
1422                 ret = -EINVAL;
1423                 goto err_release;
1424         }
1425
1426         if (data_size > priv->hw_params.max_data_size) {
1427                 IWL_DEBUG_INFO(priv, "uCode data len %d too large to fit in\n",
1428                                 data_size);
1429                 ret = -EINVAL;
1430                 goto err_release;
1431         }
1432         if (init_size > priv->hw_params.max_inst_size) {
1433                 IWL_INFO(priv, "uCode init instr len %d too large to fit in\n",
1434                         init_size);
1435                 ret = -EINVAL;
1436                 goto err_release;
1437         }
1438         if (init_data_size > priv->hw_params.max_data_size) {
1439                 IWL_INFO(priv, "uCode init data len %d too large to fit in\n",
1440                       init_data_size);
1441                 ret = -EINVAL;
1442                 goto err_release;
1443         }
1444         if (boot_size > priv->hw_params.max_bsm_size) {
1445                 IWL_INFO(priv, "uCode boot instr len %d too large to fit in\n",
1446                         boot_size);
1447                 ret = -EINVAL;
1448                 goto err_release;
1449         }
1450
1451         /* Allocate ucode buffers for card's bus-master loading ... */
1452
1453         /* Runtime instructions and 2 copies of data:
1454          * 1) unmodified from disk
1455          * 2) backup cache for save/restore during power-downs */
1456         priv->ucode_code.len = inst_size;
1457         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
1458
1459         priv->ucode_data.len = data_size;
1460         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
1461
1462         priv->ucode_data_backup.len = data_size;
1463         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1464
1465         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
1466             !priv->ucode_data_backup.v_addr)
1467                 goto err_pci_alloc;
1468
1469         /* Initialization instructions and data */
1470         if (init_size && init_data_size) {
1471                 priv->ucode_init.len = init_size;
1472                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
1473
1474                 priv->ucode_init_data.len = init_data_size;
1475                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1476
1477                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
1478                         goto err_pci_alloc;
1479         }
1480
1481         /* Bootstrap (instructions only, no data) */
1482         if (boot_size) {
1483                 priv->ucode_boot.len = boot_size;
1484                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
1485
1486                 if (!priv->ucode_boot.v_addr)
1487                         goto err_pci_alloc;
1488         }
1489
1490         /* Copy images into buffers for card's bus-master reads ... */
1491
1492         /* Runtime instructions (first block of data in file) */
1493         src = &ucode->data[0];
1494         len = priv->ucode_code.len;
1495         IWL_DEBUG_INFO(priv, "Copying (but not loading) uCode instr len %Zd\n", len);
1496         memcpy(priv->ucode_code.v_addr, src, len);
1497         IWL_DEBUG_INFO(priv, "uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
1498                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
1499
1500         /* Runtime data (2nd block)
1501          * NOTE:  Copy into backup buffer will be done in iwl_up()  */
1502         src = &ucode->data[inst_size];
1503         len = priv->ucode_data.len;
1504         IWL_DEBUG_INFO(priv, "Copying (but not loading) uCode data len %Zd\n", len);
1505         memcpy(priv->ucode_data.v_addr, src, len);
1506         memcpy(priv->ucode_data_backup.v_addr, src, len);
1507
1508         /* Initialization instructions (3rd block) */
1509         if (init_size) {
1510                 src = &ucode->data[inst_size + data_size];
1511                 len = priv->ucode_init.len;
1512                 IWL_DEBUG_INFO(priv, "Copying (but not loading) init instr len %Zd\n",
1513                                 len);
1514                 memcpy(priv->ucode_init.v_addr, src, len);
1515         }
1516
1517         /* Initialization data (4th block) */
1518         if (init_data_size) {
1519                 src = &ucode->data[inst_size + data_size + init_size];
1520                 len = priv->ucode_init_data.len;
1521                 IWL_DEBUG_INFO(priv, "Copying (but not loading) init data len %Zd\n",
1522                                len);
1523                 memcpy(priv->ucode_init_data.v_addr, src, len);
1524         }
1525
1526         /* Bootstrap instructions (5th block) */
1527         src = &ucode->data[inst_size + data_size + init_size + init_data_size];
1528         len = priv->ucode_boot.len;
1529         IWL_DEBUG_INFO(priv, "Copying (but not loading) boot instr len %Zd\n", len);
1530         memcpy(priv->ucode_boot.v_addr, src, len);
1531
1532         /* We have our copies now, allow OS release its copies */
1533         release_firmware(ucode_raw);
1534         return 0;
1535
1536  err_pci_alloc:
1537         IWL_ERR(priv, "failed to allocate pci memory\n");
1538         ret = -ENOMEM;
1539         iwl_dealloc_ucode_pci(priv);
1540
1541  err_release:
1542         release_firmware(ucode_raw);
1543
1544  error:
1545         return ret;
1546 }
1547
1548 /* temporary */
1549 static int iwl_mac_beacon_update(struct ieee80211_hw *hw,
1550                                  struct sk_buff *skb);
1551
1552 /**
1553  * iwl_alive_start - called after REPLY_ALIVE notification received
1554  *                   from protocol/runtime uCode (initialization uCode's
1555  *                   Alive gets handled by iwl_init_alive_start()).
1556  */
1557 static void iwl_alive_start(struct iwl_priv *priv)
1558 {
1559         int ret = 0;
1560
1561         IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
1562
1563         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
1564                 /* We had an error bringing up the hardware, so take it
1565                  * all the way back down so we can try again */
1566                 IWL_DEBUG_INFO(priv, "Alive failed.\n");
1567                 goto restart;
1568         }
1569
1570         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
1571          * This is a paranoid check, because we would not have gotten the
1572          * "runtime" alive if code weren't properly loaded.  */
1573         if (iwl_verify_ucode(priv)) {
1574                 /* Runtime instruction load was bad;
1575                  * take it all the way back down so we can try again */
1576                 IWL_DEBUG_INFO(priv, "Bad runtime uCode load.\n");
1577                 goto restart;
1578         }
1579
1580         iwl_clear_stations_table(priv);
1581         ret = priv->cfg->ops->lib->alive_notify(priv);
1582         if (ret) {
1583                 IWL_WARN(priv,
1584                         "Could not complete ALIVE transition [ntf]: %d\n", ret);
1585                 goto restart;
1586         }
1587
1588         /* After the ALIVE response, we can send host commands to the uCode */
1589         set_bit(STATUS_ALIVE, &priv->status);
1590
1591         if (iwl_is_rfkill(priv))
1592                 return;
1593
1594         ieee80211_wake_queues(priv->hw);
1595
1596         priv->active_rate = priv->rates_mask;
1597         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
1598
1599         if (iwl_is_associated(priv)) {
1600                 struct iwl_rxon_cmd *active_rxon =
1601                                 (struct iwl_rxon_cmd *)&priv->active_rxon;
1602
1603                 memcpy(&priv->staging_rxon, &priv->active_rxon,
1604                        sizeof(priv->staging_rxon));
1605                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1606         } else {
1607                 /* Initialize our rx_config data */
1608                 iwl_connection_init_rx_config(priv, priv->iw_mode);
1609                 iwl_set_rxon_chain(priv);
1610                 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
1611         }
1612
1613         /* Configure Bluetooth device coexistence support */
1614         iwl_send_bt_config(priv);
1615
1616         iwl_reset_run_time_calib(priv);
1617
1618         /* Configure the adapter for unassociated operation */
1619         iwl_commit_rxon(priv);
1620
1621         /* At this point, the NIC is initialized and operational */
1622         iwl_rf_kill_ct_config(priv);
1623
1624         iwl_leds_register(priv);
1625
1626         IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
1627         set_bit(STATUS_READY, &priv->status);
1628         wake_up_interruptible(&priv->wait_command_queue);
1629
1630         if (priv->error_recovering)
1631                 iwl_error_recovery(priv);
1632
1633         iwl_power_update_mode(priv, 1);
1634
1635         /* reassociate for ADHOC mode */
1636         if (priv->vif && (priv->iw_mode == NL80211_IFTYPE_ADHOC)) {
1637                 struct sk_buff *beacon = ieee80211_beacon_get(priv->hw,
1638                                                                 priv->vif);
1639                 if (beacon)
1640                         iwl_mac_beacon_update(priv->hw, beacon);
1641         }
1642
1643
1644         if (test_and_clear_bit(STATUS_MODE_PENDING, &priv->status))
1645                 iwl_set_mode(priv, priv->iw_mode);
1646
1647         return;
1648
1649  restart:
1650         queue_work(priv->workqueue, &priv->restart);
1651 }
1652
1653 static void iwl_cancel_deferred_work(struct iwl_priv *priv);
1654
1655 static void __iwl_down(struct iwl_priv *priv)
1656 {
1657         unsigned long flags;
1658         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
1659
1660         IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
1661
1662         if (!exit_pending)
1663                 set_bit(STATUS_EXIT_PENDING, &priv->status);
1664
1665         iwl_leds_unregister(priv);
1666
1667         iwl_clear_stations_table(priv);
1668
1669         /* Unblock any waiting calls */
1670         wake_up_interruptible_all(&priv->wait_command_queue);
1671
1672         /* Wipe out the EXIT_PENDING status bit if we are not actually
1673          * exiting the module */
1674         if (!exit_pending)
1675                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
1676
1677         /* stop and reset the on-board processor */
1678         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
1679
1680         /* tell the device to stop sending interrupts */
1681         spin_lock_irqsave(&priv->lock, flags);
1682         iwl_disable_interrupts(priv);
1683         spin_unlock_irqrestore(&priv->lock, flags);
1684         iwl_synchronize_irq(priv);
1685
1686         if (priv->mac80211_registered)
1687                 ieee80211_stop_queues(priv->hw);
1688
1689         /* If we have not previously called iwl_init() then
1690          * clear all bits but the RF Kill and SUSPEND bits and return */
1691         if (!iwl_is_init(priv)) {
1692                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
1693                                         STATUS_RF_KILL_HW |
1694                                test_bit(STATUS_RF_KILL_SW, &priv->status) <<
1695                                         STATUS_RF_KILL_SW |
1696                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
1697                                         STATUS_GEO_CONFIGURED |
1698                                test_bit(STATUS_IN_SUSPEND, &priv->status) <<
1699                                         STATUS_IN_SUSPEND |
1700                                test_bit(STATUS_EXIT_PENDING, &priv->status) <<
1701                                         STATUS_EXIT_PENDING;
1702                 goto exit;
1703         }
1704
1705         /* ...otherwise clear out all the status bits but the RF Kill and
1706          * SUSPEND bits and continue taking the NIC down. */
1707         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
1708                                 STATUS_RF_KILL_HW |
1709                         test_bit(STATUS_RF_KILL_SW, &priv->status) <<
1710                                 STATUS_RF_KILL_SW |
1711                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
1712                                 STATUS_GEO_CONFIGURED |
1713                         test_bit(STATUS_IN_SUSPEND, &priv->status) <<
1714                                 STATUS_IN_SUSPEND |
1715                         test_bit(STATUS_FW_ERROR, &priv->status) <<
1716                                 STATUS_FW_ERROR |
1717                        test_bit(STATUS_EXIT_PENDING, &priv->status) <<
1718                                 STATUS_EXIT_PENDING;
1719
1720         spin_lock_irqsave(&priv->lock, flags);
1721         iwl_clear_bit(priv, CSR_GP_CNTRL,
1722                          CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
1723         spin_unlock_irqrestore(&priv->lock, flags);
1724
1725         iwl_txq_ctx_stop(priv);
1726         iwl_rxq_stop(priv);
1727
1728         spin_lock_irqsave(&priv->lock, flags);
1729         if (!iwl_grab_nic_access(priv)) {
1730                 iwl_write_prph(priv, APMG_CLK_DIS_REG,
1731                                          APMG_CLK_VAL_DMA_CLK_RQT);
1732                 iwl_release_nic_access(priv);
1733         }
1734         spin_unlock_irqrestore(&priv->lock, flags);
1735
1736         udelay(5);
1737
1738         /* FIXME: apm_ops.suspend(priv) */
1739         if (exit_pending || test_bit(STATUS_IN_SUSPEND, &priv->status))
1740                 priv->cfg->ops->lib->apm_ops.stop(priv);
1741         else
1742                 priv->cfg->ops->lib->apm_ops.reset(priv);
1743  exit:
1744         memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
1745
1746         if (priv->ibss_beacon)
1747                 dev_kfree_skb(priv->ibss_beacon);
1748         priv->ibss_beacon = NULL;
1749
1750         /* clear out any free frames */
1751         iwl_clear_free_frames(priv);
1752 }
1753
1754 static void iwl_down(struct iwl_priv *priv)
1755 {
1756         mutex_lock(&priv->mutex);
1757         __iwl_down(priv);
1758         mutex_unlock(&priv->mutex);
1759
1760         iwl_cancel_deferred_work(priv);
1761 }
1762
1763 #define MAX_HW_RESTARTS 5
1764
1765 static int __iwl_up(struct iwl_priv *priv)
1766 {
1767         int i;
1768         int ret;
1769
1770         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1771                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
1772                 return -EIO;
1773         }
1774
1775         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
1776                 IWL_ERR(priv, "ucode not available for device bringup\n");
1777                 return -EIO;
1778         }
1779
1780         /* If platform's RF_KILL switch is NOT set to KILL */
1781         if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
1782                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
1783         else
1784                 set_bit(STATUS_RF_KILL_HW, &priv->status);
1785
1786         if (iwl_is_rfkill(priv)) {
1787                 iwl_enable_interrupts(priv);
1788                 IWL_WARN(priv, "Radio disabled by %s RF Kill switch\n",
1789                     test_bit(STATUS_RF_KILL_HW, &priv->status) ? "HW" : "SW");
1790                 return 0;
1791         }
1792
1793         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
1794
1795         ret = iwl_hw_nic_init(priv);
1796         if (ret) {
1797                 IWL_ERR(priv, "Unable to init nic\n");
1798                 return ret;
1799         }
1800
1801         /* make sure rfkill handshake bits are cleared */
1802         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
1803         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
1804                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
1805
1806         /* clear (again), then enable host interrupts */
1807         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
1808         iwl_enable_interrupts(priv);
1809
1810         /* really make sure rfkill handshake bits are cleared */
1811         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
1812         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
1813
1814         /* Copy original ucode data image from disk into backup cache.
1815          * This will be used to initialize the on-board processor's
1816          * data SRAM for a clean start when the runtime program first loads. */
1817         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
1818                priv->ucode_data.len);
1819
1820         for (i = 0; i < MAX_HW_RESTARTS; i++) {
1821
1822                 iwl_clear_stations_table(priv);
1823
1824                 /* load bootstrap state machine,
1825                  * load bootstrap program into processor's memory,
1826                  * prepare to load the "initialize" uCode */
1827                 ret = priv->cfg->ops->lib->load_ucode(priv);
1828
1829                 if (ret) {
1830                         IWL_ERR(priv, "Unable to set up bootstrap uCode: %d\n",
1831                                 ret);
1832                         continue;
1833                 }
1834
1835                 /* Clear out the uCode error bit if it is set */
1836                 clear_bit(STATUS_FW_ERROR, &priv->status);
1837
1838                 /* start card; "initialize" will load runtime ucode */
1839                 iwl_nic_start(priv);
1840
1841                 IWL_DEBUG_INFO(priv, DRV_NAME " is coming up\n");
1842
1843                 return 0;
1844         }
1845
1846         set_bit(STATUS_EXIT_PENDING, &priv->status);
1847         __iwl_down(priv);
1848         clear_bit(STATUS_EXIT_PENDING, &priv->status);
1849
1850         /* tried to restart and config the device for as long as our
1851          * patience could withstand */
1852         IWL_ERR(priv, "Unable to initialize device after %d attempts.\n", i);
1853         return -EIO;
1854 }
1855
1856
1857 /*****************************************************************************
1858  *
1859  * Workqueue callbacks
1860  *
1861  *****************************************************************************/
1862
1863 static void iwl_bg_init_alive_start(struct work_struct *data)
1864 {
1865         struct iwl_priv *priv =
1866             container_of(data, struct iwl_priv, init_alive_start.work);
1867
1868         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1869                 return;
1870
1871         mutex_lock(&priv->mutex);
1872         priv->cfg->ops->lib->init_alive_start(priv);
1873         mutex_unlock(&priv->mutex);
1874 }
1875
1876 static void iwl_bg_alive_start(struct work_struct *data)
1877 {
1878         struct iwl_priv *priv =
1879             container_of(data, struct iwl_priv, alive_start.work);
1880
1881         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1882                 return;
1883
1884         mutex_lock(&priv->mutex);
1885         iwl_alive_start(priv);
1886         mutex_unlock(&priv->mutex);
1887 }
1888
1889 static void iwl_bg_run_time_calib_work(struct work_struct *work)
1890 {
1891         struct iwl_priv *priv = container_of(work, struct iwl_priv,
1892                         run_time_calib_work);
1893
1894         mutex_lock(&priv->mutex);
1895
1896         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
1897             test_bit(STATUS_SCANNING, &priv->status)) {
1898                 mutex_unlock(&priv->mutex);
1899                 return;
1900         }
1901
1902         if (priv->start_calib) {
1903                 iwl_chain_noise_calibration(priv, &priv->statistics);
1904
1905                 iwl_sensitivity_calibration(priv, &priv->statistics);
1906         }
1907
1908         mutex_unlock(&priv->mutex);
1909         return;
1910 }
1911
1912 static void iwl_bg_up(struct work_struct *data)
1913 {
1914         struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
1915
1916         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1917                 return;
1918
1919         mutex_lock(&priv->mutex);
1920         __iwl_up(priv);
1921         mutex_unlock(&priv->mutex);
1922         iwl_rfkill_set_hw_state(priv);
1923 }
1924
1925 static void iwl_bg_restart(struct work_struct *data)
1926 {
1927         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
1928
1929         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1930                 return;
1931
1932         iwl_down(priv);
1933         queue_work(priv->workqueue, &priv->up);
1934 }
1935
1936 static void iwl_bg_rx_replenish(struct work_struct *data)
1937 {
1938         struct iwl_priv *priv =
1939             container_of(data, struct iwl_priv, rx_replenish);
1940
1941         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1942                 return;
1943
1944         mutex_lock(&priv->mutex);
1945         iwl_rx_replenish(priv);
1946         mutex_unlock(&priv->mutex);
1947 }
1948
1949 #define IWL_DELAY_NEXT_SCAN (HZ*2)
1950
1951 static void iwl_post_associate(struct iwl_priv *priv)
1952 {
1953         struct ieee80211_conf *conf = NULL;
1954         int ret = 0;
1955         unsigned long flags;
1956
1957         if (priv->iw_mode == NL80211_IFTYPE_AP) {
1958                 IWL_ERR(priv, "%s Should not be called in AP mode\n", __func__);
1959                 return;
1960         }
1961
1962         IWL_DEBUG_ASSOC(priv, "Associated as %d to: %pM\n",
1963                         priv->assoc_id, priv->active_rxon.bssid_addr);
1964
1965
1966         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1967                 return;
1968
1969
1970         if (!priv->vif || !priv->is_open)
1971                 return;
1972
1973         iwl_power_cancel_timeout(priv);
1974         iwl_scan_cancel_timeout(priv, 200);
1975
1976         conf = ieee80211_get_hw_conf(priv->hw);
1977
1978         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1979         iwl_commit_rxon(priv);
1980
1981         iwl_setup_rxon_timing(priv);
1982         ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
1983                               sizeof(priv->rxon_timing), &priv->rxon_timing);
1984         if (ret)
1985                 IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
1986                             "Attempting to continue.\n");
1987
1988         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
1989
1990         iwl_set_rxon_ht(priv, &priv->current_ht_config);
1991
1992         iwl_set_rxon_chain(priv);
1993         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
1994
1995         IWL_DEBUG_ASSOC(priv, "assoc id %d beacon interval %d\n",
1996                         priv->assoc_id, priv->beacon_int);
1997
1998         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
1999                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2000         else
2001                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2002
2003         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
2004                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
2005                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2006                 else
2007                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2008
2009                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
2010                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2011
2012         }
2013
2014         iwl_commit_rxon(priv);
2015
2016         switch (priv->iw_mode) {
2017         case NL80211_IFTYPE_STATION:
2018                 break;
2019
2020         case NL80211_IFTYPE_ADHOC:
2021
2022                 /* assume default assoc id */
2023                 priv->assoc_id = 1;
2024
2025                 iwl_rxon_add_station(priv, priv->bssid, 0);
2026                 iwl_send_beacon_cmd(priv);
2027
2028                 break;
2029
2030         default:
2031                 IWL_ERR(priv, "%s Should not be called in %d mode\n",
2032                           __func__, priv->iw_mode);
2033                 break;
2034         }
2035
2036         if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
2037                 priv->assoc_station_added = 1;
2038
2039         spin_lock_irqsave(&priv->lock, flags);
2040         iwl_activate_qos(priv, 0);
2041         spin_unlock_irqrestore(&priv->lock, flags);
2042
2043         /* the chain noise calibration will enabled PM upon completion
2044          * If chain noise has already been run, then we need to enable
2045          * power management here */
2046         if (priv->chain_noise_data.state == IWL_CHAIN_NOISE_DONE)
2047                 iwl_power_enable_management(priv);
2048
2049         /* Enable Rx differential gain and sensitivity calibrations */
2050         iwl_chain_noise_reset(priv);
2051         priv->start_calib = 1;
2052
2053 }
2054
2055 /*****************************************************************************
2056  *
2057  * mac80211 entry point functions
2058  *
2059  *****************************************************************************/
2060
2061 #define UCODE_READY_TIMEOUT     (4 * HZ)
2062
2063 static int iwl_mac_start(struct ieee80211_hw *hw)
2064 {
2065         struct iwl_priv *priv = hw->priv;
2066         int ret;
2067
2068         IWL_DEBUG_MAC80211(priv, "enter\n");
2069
2070         /* we should be verifying the device is ready to be opened */
2071         mutex_lock(&priv->mutex);
2072
2073         memset(&priv->staging_rxon, 0, sizeof(struct iwl_rxon_cmd));
2074         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
2075          * ucode filename and max sizes are card-specific. */
2076
2077         if (!priv->ucode_code.len) {
2078                 ret = iwl_read_ucode(priv);
2079                 if (ret) {
2080                         IWL_ERR(priv, "Could not read microcode: %d\n", ret);
2081                         mutex_unlock(&priv->mutex);
2082                         return ret;
2083                 }
2084         }
2085
2086         ret = __iwl_up(priv);
2087
2088         mutex_unlock(&priv->mutex);
2089
2090         iwl_rfkill_set_hw_state(priv);
2091
2092         if (ret)
2093                 return ret;
2094
2095         if (iwl_is_rfkill(priv))
2096                 goto out;
2097
2098         IWL_DEBUG_INFO(priv, "Start UP work done.\n");
2099
2100         if (test_bit(STATUS_IN_SUSPEND, &priv->status))
2101                 return 0;
2102
2103         /* Wait for START_ALIVE from Run Time ucode. Otherwise callbacks from
2104          * mac80211 will not be run successfully. */
2105         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
2106                         test_bit(STATUS_READY, &priv->status),
2107                         UCODE_READY_TIMEOUT);
2108         if (!ret) {
2109                 if (!test_bit(STATUS_READY, &priv->status)) {
2110                         IWL_ERR(priv, "START_ALIVE timeout after %dms.\n",
2111                                 jiffies_to_msecs(UCODE_READY_TIMEOUT));
2112                         return -ETIMEDOUT;
2113                 }
2114         }
2115
2116 out:
2117         priv->is_open = 1;
2118         IWL_DEBUG_MAC80211(priv, "leave\n");
2119         return 0;
2120 }
2121
2122 static void iwl_mac_stop(struct ieee80211_hw *hw)
2123 {
2124         struct iwl_priv *priv = hw->priv;
2125
2126         IWL_DEBUG_MAC80211(priv, "enter\n");
2127
2128         if (!priv->is_open) {
2129                 IWL_DEBUG_MAC80211(priv, "leave - skip\n");
2130                 return;
2131         }
2132
2133         priv->is_open = 0;
2134
2135         if (iwl_is_ready_rf(priv)) {
2136                 /* stop mac, cancel any scan request and clear
2137                  * RXON_FILTER_ASSOC_MSK BIT
2138                  */
2139                 mutex_lock(&priv->mutex);
2140                 iwl_scan_cancel_timeout(priv, 100);
2141                 mutex_unlock(&priv->mutex);
2142         }
2143
2144         iwl_down(priv);
2145
2146         flush_workqueue(priv->workqueue);
2147
2148         /* enable interrupts again in order to receive rfkill changes */
2149         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2150         iwl_enable_interrupts(priv);
2151
2152         IWL_DEBUG_MAC80211(priv, "leave\n");
2153 }
2154
2155 static int iwl_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
2156 {
2157         struct iwl_priv *priv = hw->priv;
2158
2159         IWL_DEBUG_MACDUMP(priv, "enter\n");
2160
2161         IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
2162                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
2163
2164         if (iwl_tx_skb(priv, skb))
2165                 dev_kfree_skb_any(skb);
2166
2167         IWL_DEBUG_MACDUMP(priv, "leave\n");
2168         return NETDEV_TX_OK;
2169 }
2170
2171 static int iwl_mac_add_interface(struct ieee80211_hw *hw,
2172                                  struct ieee80211_if_init_conf *conf)
2173 {
2174         struct iwl_priv *priv = hw->priv;
2175         unsigned long flags;
2176
2177         IWL_DEBUG_MAC80211(priv, "enter: type %d\n", conf->type);
2178
2179         if (priv->vif) {
2180                 IWL_DEBUG_MAC80211(priv, "leave - vif != NULL\n");
2181                 return -EOPNOTSUPP;
2182         }
2183
2184         spin_lock_irqsave(&priv->lock, flags);
2185         priv->vif = conf->vif;
2186         priv->iw_mode = conf->type;
2187
2188         spin_unlock_irqrestore(&priv->lock, flags);
2189
2190         mutex_lock(&priv->mutex);
2191
2192         if (conf->mac_addr) {
2193                 IWL_DEBUG_MAC80211(priv, "Set %pM\n", conf->mac_addr);
2194                 memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
2195         }
2196
2197         if (iwl_set_mode(priv, conf->type) == -EAGAIN)
2198                 /* we are not ready, will run again when ready */
2199                 set_bit(STATUS_MODE_PENDING, &priv->status);
2200
2201         mutex_unlock(&priv->mutex);
2202
2203         IWL_DEBUG_MAC80211(priv, "leave\n");
2204         return 0;
2205 }
2206
2207 /**
2208  * iwl_mac_config - mac80211 config callback
2209  *
2210  * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
2211  * be set inappropriately and the driver currently sets the hardware up to
2212  * use it whenever needed.
2213  */
2214 static int iwl_mac_config(struct ieee80211_hw *hw, u32 changed)
2215 {
2216         struct iwl_priv *priv = hw->priv;
2217         const struct iwl_channel_info *ch_info;
2218         struct ieee80211_conf *conf = &hw->conf;
2219         unsigned long flags;
2220         int ret = 0;
2221         u16 channel;
2222
2223         mutex_lock(&priv->mutex);
2224         IWL_DEBUG_MAC80211(priv, "enter to channel %d\n", conf->channel->hw_value);
2225
2226         priv->current_ht_config.is_ht = conf_is_ht(conf);
2227
2228         if (conf->radio_enabled && iwl_radio_kill_sw_enable_radio(priv)) {
2229                 IWL_DEBUG_MAC80211(priv, "leave - RF-KILL - waiting for uCode\n");
2230                 goto out;
2231         }
2232
2233         if (!conf->radio_enabled)
2234                 iwl_radio_kill_sw_disable_radio(priv);
2235
2236         if (!iwl_is_ready(priv)) {
2237                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2238                 ret = -EIO;
2239                 goto out;
2240         }
2241
2242         if (unlikely(!priv->cfg->mod_params->disable_hw_scan &&
2243                      test_bit(STATUS_SCANNING, &priv->status))) {
2244                 IWL_DEBUG_MAC80211(priv, "leave - scanning\n");
2245                 mutex_unlock(&priv->mutex);
2246                 return 0;
2247         }
2248
2249         channel = ieee80211_frequency_to_channel(conf->channel->center_freq);
2250         ch_info = iwl_get_channel_info(priv, conf->channel->band, channel);
2251         if (!is_channel_valid(ch_info)) {
2252                 IWL_DEBUG_MAC80211(priv, "leave - invalid channel\n");
2253                 ret = -EINVAL;
2254                 goto out;
2255         }
2256
2257         if (priv->iw_mode == NL80211_IFTYPE_ADHOC &&
2258             !is_channel_ibss(ch_info)) {
2259                 IWL_ERR(priv, "channel %d in band %d not IBSS channel\n",
2260                         conf->channel->hw_value, conf->channel->band);
2261                 ret = -EINVAL;
2262                 goto out;
2263         }
2264
2265         spin_lock_irqsave(&priv->lock, flags);
2266
2267
2268         /* if we are switching from ht to 2.4 clear flags
2269          * from any ht related info since 2.4 does not
2270          * support ht */
2271         if ((le16_to_cpu(priv->staging_rxon.channel) != channel)
2272 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
2273             && !(conf->flags & IEEE80211_CONF_CHANNEL_SWITCH)
2274 #endif
2275         )
2276                 priv->staging_rxon.flags = 0;
2277
2278         iwl_set_rxon_channel(priv, conf->channel);
2279
2280         iwl_set_flags_for_band(priv, conf->channel->band);
2281
2282         /* The list of supported rates and rate mask can be different
2283          * for each band; since the band may have changed, reset
2284          * the rate mask to what mac80211 lists */
2285         iwl_set_rate(priv);
2286
2287         spin_unlock_irqrestore(&priv->lock, flags);
2288
2289 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
2290         if (conf->flags & IEEE80211_CONF_CHANNEL_SWITCH) {
2291                 iwl_hw_channel_switch(priv, conf->channel);
2292                 goto out;
2293         }
2294 #endif
2295
2296         if (!conf->radio_enabled) {
2297                 IWL_DEBUG_MAC80211(priv, "leave - radio disabled\n");
2298                 goto out;
2299         }
2300
2301         if (iwl_is_rfkill(priv)) {
2302                 IWL_DEBUG_MAC80211(priv, "leave - RF kill\n");
2303                 ret = -EIO;
2304                 goto out;
2305         }
2306
2307         if (conf->flags & IEEE80211_CONF_PS)
2308                 ret = iwl_power_set_user_mode(priv, IWL_POWER_INDEX_3);
2309         else
2310                 ret = iwl_power_set_user_mode(priv, IWL_POWER_MODE_CAM);
2311         if (ret)
2312                 IWL_DEBUG_MAC80211(priv, "Error setting power level\n");
2313
2314         IWL_DEBUG_MAC80211(priv, "TX Power old=%d new=%d\n",
2315                            priv->tx_power_user_lmt, conf->power_level);
2316
2317         iwl_set_tx_power(priv, conf->power_level, false);
2318
2319         iwl_set_rate(priv);
2320
2321         /* call to ensure that 4965 rx_chain is set properly in monitor mode */
2322         iwl_set_rxon_chain(priv);
2323
2324         if (memcmp(&priv->active_rxon,
2325                    &priv->staging_rxon, sizeof(priv->staging_rxon)))
2326                 iwl_commit_rxon(priv);
2327         else
2328                 IWL_DEBUG_INFO(priv, "No re-sending same RXON configuration.\n");
2329
2330         IWL_DEBUG_MAC80211(priv, "leave\n");
2331
2332 out:
2333         mutex_unlock(&priv->mutex);
2334         return ret;
2335 }
2336
2337 static void iwl_config_ap(struct iwl_priv *priv)
2338 {
2339         int ret = 0;
2340         unsigned long flags;
2341
2342         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2343                 return;
2344
2345         /* The following should be done only at AP bring up */
2346         if (!iwl_is_associated(priv)) {
2347
2348                 /* RXON - unassoc (to set timing command) */
2349                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2350                 iwl_commit_rxon(priv);
2351
2352                 /* RXON Timing */
2353                 iwl_setup_rxon_timing(priv);
2354                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
2355                                 sizeof(priv->rxon_timing), &priv->rxon_timing);
2356                 if (ret)
2357                         IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
2358                                         "Attempting to continue.\n");
2359
2360                 iwl_set_rxon_chain(priv);
2361
2362                 /* FIXME: what should be the assoc_id for AP? */
2363                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
2364                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
2365                         priv->staging_rxon.flags |=
2366                                 RXON_FLG_SHORT_PREAMBLE_MSK;
2367                 else
2368                         priv->staging_rxon.flags &=
2369                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
2370
2371                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
2372                         if (priv->assoc_capability &
2373                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
2374                                 priv->staging_rxon.flags |=
2375                                         RXON_FLG_SHORT_SLOT_MSK;
2376                         else
2377                                 priv->staging_rxon.flags &=
2378                                         ~RXON_FLG_SHORT_SLOT_MSK;
2379
2380                         if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
2381                                 priv->staging_rxon.flags &=
2382                                         ~RXON_FLG_SHORT_SLOT_MSK;
2383                 }
2384                 /* restore RXON assoc */
2385                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2386                 iwl_commit_rxon(priv);
2387                 spin_lock_irqsave(&priv->lock, flags);
2388                 iwl_activate_qos(priv, 1);
2389                 spin_unlock_irqrestore(&priv->lock, flags);
2390                 iwl_rxon_add_station(priv, iwl_bcast_addr, 0);
2391         }
2392         iwl_send_beacon_cmd(priv);
2393
2394         /* FIXME - we need to add code here to detect a totally new
2395          * configuration, reset the AP, unassoc, rxon timing, assoc,
2396          * clear sta table, add BCAST sta... */
2397 }
2398
2399
2400 static int iwl_mac_config_interface(struct ieee80211_hw *hw,
2401                                         struct ieee80211_vif *vif,
2402                                     struct ieee80211_if_conf *conf)
2403 {
2404         struct iwl_priv *priv = hw->priv;
2405         int rc;
2406
2407         if (conf == NULL)
2408                 return -EIO;
2409
2410         if (priv->vif != vif) {
2411                 IWL_DEBUG_MAC80211(priv, "leave - priv->vif != vif\n");
2412                 return 0;
2413         }
2414
2415         if (priv->iw_mode == NL80211_IFTYPE_ADHOC &&
2416             conf->changed & IEEE80211_IFCC_BEACON) {
2417                 struct sk_buff *beacon = ieee80211_beacon_get(hw, vif);
2418                 if (!beacon)
2419                         return -ENOMEM;
2420                 mutex_lock(&priv->mutex);
2421                 rc = iwl_mac_beacon_update(hw, beacon);
2422                 mutex_unlock(&priv->mutex);
2423                 if (rc)
2424                         return rc;
2425         }
2426
2427         if (!iwl_is_alive(priv))
2428                 return -EAGAIN;
2429
2430         mutex_lock(&priv->mutex);
2431
2432         if (conf->bssid)
2433                 IWL_DEBUG_MAC80211(priv, "bssid: %pM\n", conf->bssid);
2434
2435 /*
2436  * very dubious code was here; the probe filtering flag is never set:
2437  *
2438         if (unlikely(test_bit(STATUS_SCANNING, &priv->status)) &&
2439             !(priv->hw->flags & IEEE80211_HW_NO_PROBE_FILTERING)) {
2440  */
2441
2442         if (priv->iw_mode == NL80211_IFTYPE_AP) {
2443                 if (!conf->bssid) {
2444                         conf->bssid = priv->mac_addr;
2445                         memcpy(priv->bssid, priv->mac_addr, ETH_ALEN);
2446                         IWL_DEBUG_MAC80211(priv, "bssid was set to: %pM\n",
2447                                            conf->bssid);
2448                 }
2449                 if (priv->ibss_beacon)
2450                         dev_kfree_skb(priv->ibss_beacon);
2451
2452                 priv->ibss_beacon = ieee80211_beacon_get(hw, vif);
2453         }
2454
2455         if (iwl_is_rfkill(priv))
2456                 goto done;
2457
2458         if (conf->bssid && !is_zero_ether_addr(conf->bssid) &&
2459             !is_multicast_ether_addr(conf->bssid)) {
2460                 /* If there is currently a HW scan going on in the background
2461                  * then we need to cancel it else the RXON below will fail. */
2462                 if (iwl_scan_cancel_timeout(priv, 100)) {
2463                         IWL_WARN(priv, "Aborted scan still in progress "
2464                                     "after 100ms\n");
2465                         IWL_DEBUG_MAC80211(priv, "leaving - scan abort failed.\n");
2466                         mutex_unlock(&priv->mutex);
2467                         return -EAGAIN;
2468                 }
2469                 memcpy(priv->staging_rxon.bssid_addr, conf->bssid, ETH_ALEN);
2470
2471                 /* TODO: Audit driver for usage of these members and see
2472                  * if mac80211 deprecates them (priv->bssid looks like it
2473                  * shouldn't be there, but I haven't scanned the IBSS code
2474                  * to verify) - jpk */
2475                 memcpy(priv->bssid, conf->bssid, ETH_ALEN);
2476
2477                 if (priv->iw_mode == NL80211_IFTYPE_AP)
2478                         iwl_config_ap(priv);
2479                 else {
2480                         rc = iwl_commit_rxon(priv);
2481                         if ((priv->iw_mode == NL80211_IFTYPE_STATION) && rc)
2482                                 iwl_rxon_add_station(
2483                                         priv, priv->active_rxon.bssid_addr, 1);
2484                 }
2485
2486         } else {
2487                 iwl_scan_cancel_timeout(priv, 100);
2488                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2489                 iwl_commit_rxon(priv);
2490         }
2491
2492  done:
2493         IWL_DEBUG_MAC80211(priv, "leave\n");
2494         mutex_unlock(&priv->mutex);
2495
2496         return 0;
2497 }
2498
2499 static void iwl_mac_remove_interface(struct ieee80211_hw *hw,
2500                                      struct ieee80211_if_init_conf *conf)
2501 {
2502         struct iwl_priv *priv = hw->priv;
2503
2504         IWL_DEBUG_MAC80211(priv, "enter\n");
2505
2506         mutex_lock(&priv->mutex);
2507
2508         if (iwl_is_ready_rf(priv)) {
2509                 iwl_scan_cancel_timeout(priv, 100);
2510                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2511                 iwl_commit_rxon(priv);
2512         }
2513         if (priv->vif == conf->vif) {
2514                 priv->vif = NULL;
2515                 memset(priv->bssid, 0, ETH_ALEN);
2516         }
2517         mutex_unlock(&priv->mutex);
2518
2519         IWL_DEBUG_MAC80211(priv, "leave\n");
2520
2521 }
2522
2523 #define IWL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6)
2524 static void iwl_bss_info_changed(struct ieee80211_hw *hw,
2525                                      struct ieee80211_vif *vif,
2526                                      struct ieee80211_bss_conf *bss_conf,
2527                                      u32 changes)
2528 {
2529         struct iwl_priv *priv = hw->priv;
2530
2531         IWL_DEBUG_MAC80211(priv, "changes = 0x%X\n", changes);
2532
2533         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
2534                 IWL_DEBUG_MAC80211(priv, "ERP_PREAMBLE %d\n",
2535                                    bss_conf->use_short_preamble);
2536                 if (bss_conf->use_short_preamble)
2537                         priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2538                 else
2539                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2540         }
2541
2542         if (changes & BSS_CHANGED_ERP_CTS_PROT) {
2543                 IWL_DEBUG_MAC80211(priv, "ERP_CTS %d\n", bss_conf->use_cts_prot);
2544                 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
2545                         priv->staging_rxon.flags |= RXON_FLG_TGG_PROTECT_MSK;
2546                 else
2547                         priv->staging_rxon.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
2548         }
2549
2550         if (changes & BSS_CHANGED_HT) {
2551                 iwl_ht_conf(priv, bss_conf);
2552                 iwl_set_rxon_chain(priv);
2553         }
2554
2555         if (changes & BSS_CHANGED_ASSOC) {
2556                 IWL_DEBUG_MAC80211(priv, "ASSOC %d\n", bss_conf->assoc);
2557                 /* This should never happen as this function should
2558                  * never be called from interrupt context. */
2559                 if (WARN_ON_ONCE(in_interrupt()))
2560                         return;
2561                 if (bss_conf->assoc) {
2562                         priv->assoc_id = bss_conf->aid;
2563                         priv->beacon_int = bss_conf->beacon_int;
2564                         priv->power_data.dtim_period = bss_conf->dtim_period;
2565                         priv->timestamp = bss_conf->timestamp;
2566                         priv->assoc_capability = bss_conf->assoc_capability;
2567
2568                         /* we have just associated, don't start scan too early
2569                          * leave time for EAPOL exchange to complete
2570                          */
2571                         priv->next_scan_jiffies = jiffies +
2572                                         IWL_DELAY_NEXT_SCAN_AFTER_ASSOC;
2573                         mutex_lock(&priv->mutex);
2574                         iwl_post_associate(priv);
2575                         mutex_unlock(&priv->mutex);
2576                 } else {
2577                         priv->assoc_id = 0;
2578                         IWL_DEBUG_MAC80211(priv, "DISASSOC %d\n", bss_conf->assoc);
2579                 }
2580         } else if (changes && iwl_is_associated(priv) && priv->assoc_id) {
2581                         IWL_DEBUG_MAC80211(priv, "Associated Changes %d\n", changes);
2582                         iwl_send_rxon_assoc(priv);
2583         }
2584
2585 }
2586
2587 static void iwl_mac_update_tkip_key(struct ieee80211_hw *hw,
2588                         struct ieee80211_key_conf *keyconf, const u8 *addr,
2589                         u32 iv32, u16 *phase1key)
2590 {
2591
2592         struct iwl_priv *priv = hw->priv;
2593         IWL_DEBUG_MAC80211(priv, "enter\n");
2594
2595         iwl_update_tkip_key(priv, keyconf, addr, iv32, phase1key);
2596
2597         IWL_DEBUG_MAC80211(priv, "leave\n");
2598 }
2599
2600 static int iwl_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
2601                            struct ieee80211_vif *vif,
2602                            struct ieee80211_sta *sta,
2603                            struct ieee80211_key_conf *key)
2604 {
2605         struct iwl_priv *priv = hw->priv;
2606         const u8 *addr;
2607         int ret;
2608         u8 sta_id;
2609         bool is_default_wep_key = false;
2610
2611         IWL_DEBUG_MAC80211(priv, "enter\n");
2612
2613         if (priv->hw_params.sw_crypto) {
2614                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
2615                 return -EOPNOTSUPP;
2616         }
2617         addr = sta ? sta->addr : iwl_bcast_addr;
2618         sta_id = iwl_find_station(priv, addr);
2619         if (sta_id == IWL_INVALID_STATION) {
2620                 IWL_DEBUG_MAC80211(priv, "leave - %pM not in station map.\n",
2621                                    addr);
2622                 return -EINVAL;
2623
2624         }
2625
2626         mutex_lock(&priv->mutex);
2627         iwl_scan_cancel_timeout(priv, 100);
2628         mutex_unlock(&priv->mutex);
2629
2630         /* If we are getting WEP group key and we didn't receive any key mapping
2631          * so far, we are in legacy wep mode (group key only), otherwise we are
2632          * in 1X mode.
2633          * In legacy wep mode, we use another host command to the uCode */
2634         if (key->alg == ALG_WEP && sta_id == priv->hw_params.bcast_sta_id &&
2635                 priv->iw_mode != NL80211_IFTYPE_AP) {
2636                 if (cmd == SET_KEY)
2637                         is_default_wep_key = !priv->key_mapping_key;
2638                 else
2639                         is_default_wep_key =
2640                                         (key->hw_key_idx == HW_KEY_DEFAULT);
2641         }
2642
2643         switch (cmd) {
2644         case SET_KEY:
2645                 if (is_default_wep_key)
2646                         ret = iwl_set_default_wep_key(priv, key);
2647                 else
2648                         ret = iwl_set_dynamic_key(priv, key, sta_id);
2649
2650                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
2651                 break;
2652         case DISABLE_KEY:
2653                 if (is_default_wep_key)
2654                         ret = iwl_remove_default_wep_key(priv, key);
2655                 else
2656                         ret = iwl_remove_dynamic_key(priv, key, sta_id);
2657
2658                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
2659                 break;
2660         default:
2661                 ret = -EINVAL;
2662         }
2663
2664         IWL_DEBUG_MAC80211(priv, "leave\n");
2665
2666         return ret;
2667 }
2668
2669 static int iwl_mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
2670                            const struct ieee80211_tx_queue_params *params)
2671 {
2672         struct iwl_priv *priv = hw->priv;
2673         unsigned long flags;
2674         int q;
2675
2676         IWL_DEBUG_MAC80211(priv, "enter\n");
2677
2678         if (!iwl_is_ready_rf(priv)) {
2679                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
2680                 return -EIO;
2681         }
2682
2683         if (queue >= AC_NUM) {
2684                 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
2685                 return 0;
2686         }
2687
2688         q = AC_NUM - 1 - queue;
2689
2690         spin_lock_irqsave(&priv->lock, flags);
2691
2692         priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
2693         priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
2694         priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
2695         priv->qos_data.def_qos_parm.ac[q].edca_txop =
2696                         cpu_to_le16((params->txop * 32));
2697
2698         priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
2699         priv->qos_data.qos_active = 1;
2700
2701         if (priv->iw_mode == NL80211_IFTYPE_AP)
2702                 iwl_activate_qos(priv, 1);
2703         else if (priv->assoc_id && iwl_is_associated(priv))
2704                 iwl_activate_qos(priv, 0);
2705
2706         spin_unlock_irqrestore(&priv->lock, flags);
2707
2708         IWL_DEBUG_MAC80211(priv, "leave\n");
2709         return 0;
2710 }
2711
2712 static int iwl_mac_ampdu_action(struct ieee80211_hw *hw,
2713                              enum ieee80211_ampdu_mlme_action action,
2714                              struct ieee80211_sta *sta, u16 tid, u16 *ssn)
2715 {
2716         struct iwl_priv *priv = hw->priv;
2717
2718         IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n",
2719                      sta->addr, tid);
2720
2721         if (!(priv->cfg->sku & IWL_SKU_N))
2722                 return -EACCES;
2723
2724         switch (action) {
2725         case IEEE80211_AMPDU_RX_START:
2726                 IWL_DEBUG_HT(priv, "start Rx\n");
2727                 return iwl_sta_rx_agg_start(priv, sta->addr, tid, *ssn);
2728         case IEEE80211_AMPDU_RX_STOP:
2729                 IWL_DEBUG_HT(priv, "stop Rx\n");
2730                 return iwl_sta_rx_agg_stop(priv, sta->addr, tid);
2731         case IEEE80211_AMPDU_TX_START:
2732                 IWL_DEBUG_HT(priv, "start Tx\n");
2733                 return iwl_tx_agg_start(priv, sta->addr, tid, ssn);
2734         case IEEE80211_AMPDU_TX_STOP:
2735                 IWL_DEBUG_HT(priv, "stop Tx\n");
2736                 return iwl_tx_agg_stop(priv, sta->addr, tid);
2737         default:
2738                 IWL_DEBUG_HT(priv, "unknown\n");
2739                 return -EINVAL;
2740                 break;
2741         }
2742         return 0;
2743 }
2744
2745 static int iwl_mac_get_tx_stats(struct ieee80211_hw *hw,
2746                                 struct ieee80211_tx_queue_stats *stats)
2747 {
2748         struct iwl_priv *priv = hw->priv;
2749         int i, avail;
2750         struct iwl_tx_queue *txq;
2751         struct iwl_queue *q;
2752         unsigned long flags;
2753
2754         IWL_DEBUG_MAC80211(priv, "enter\n");
2755
2756         if (!iwl_is_ready_rf(priv)) {
2757                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
2758                 return -EIO;
2759         }
2760
2761         spin_lock_irqsave(&priv->lock, flags);
2762
2763         for (i = 0; i < AC_NUM; i++) {
2764                 txq = &priv->txq[i];
2765                 q = &txq->q;
2766                 avail = iwl_queue_space(q);
2767
2768                 stats[i].len = q->n_window - avail;
2769                 stats[i].limit = q->n_window - q->high_mark;
2770                 stats[i].count = q->n_window;
2771
2772         }
2773         spin_unlock_irqrestore(&priv->lock, flags);
2774
2775         IWL_DEBUG_MAC80211(priv, "leave\n");
2776
2777         return 0;
2778 }
2779
2780 static int iwl_mac_get_stats(struct ieee80211_hw *hw,
2781                              struct ieee80211_low_level_stats *stats)
2782 {
2783         struct iwl_priv *priv = hw->priv;
2784
2785         priv = hw->priv;
2786         IWL_DEBUG_MAC80211(priv, "enter\n");
2787         IWL_DEBUG_MAC80211(priv, "leave\n");
2788
2789         return 0;
2790 }
2791
2792 static void iwl_mac_reset_tsf(struct ieee80211_hw *hw)
2793 {
2794         struct iwl_priv *priv = hw->priv;
2795         unsigned long flags;
2796
2797         mutex_lock(&priv->mutex);
2798         IWL_DEBUG_MAC80211(priv, "enter\n");
2799
2800         spin_lock_irqsave(&priv->lock, flags);
2801         memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_info));
2802         spin_unlock_irqrestore(&priv->lock, flags);
2803
2804         iwl_reset_qos(priv);
2805
2806         spin_lock_irqsave(&priv->lock, flags);
2807         priv->assoc_id = 0;
2808         priv->assoc_capability = 0;
2809         priv->assoc_station_added = 0;
2810
2811         /* new association get rid of ibss beacon skb */
2812         if (priv->ibss_beacon)
2813                 dev_kfree_skb(priv->ibss_beacon);
2814
2815         priv->ibss_beacon = NULL;
2816
2817         priv->beacon_int = priv->hw->conf.beacon_int;
2818         priv->timestamp = 0;
2819         if ((priv->iw_mode == NL80211_IFTYPE_STATION))
2820                 priv->beacon_int = 0;
2821
2822         spin_unlock_irqrestore(&priv->lock, flags);
2823
2824         if (!iwl_is_ready_rf(priv)) {
2825                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2826                 mutex_unlock(&priv->mutex);
2827                 return;
2828         }
2829
2830         /* we are restarting association process
2831          * clear RXON_FILTER_ASSOC_MSK bit
2832          */
2833         if (priv->iw_mode != NL80211_IFTYPE_AP) {
2834                 iwl_scan_cancel_timeout(priv, 100);
2835                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2836                 iwl_commit_rxon(priv);
2837         }
2838
2839         iwl_power_update_mode(priv, 0);
2840
2841         /* Per mac80211.h: This is only used in IBSS mode... */
2842         if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
2843
2844                 /* switch to CAM during association period.
2845                  * the ucode will block any association/authentication
2846                  * frome during assiciation period if it can not hear
2847                  * the AP because of PM. the timer enable PM back is
2848                  * association do not complete
2849                  */
2850                 if (priv->hw->conf.channel->flags & (IEEE80211_CHAN_PASSIVE_SCAN |
2851                                                      IEEE80211_CHAN_RADAR))
2852                                 iwl_power_disable_management(priv, 3000);
2853
2854                 IWL_DEBUG_MAC80211(priv, "leave - not in IBSS\n");
2855                 mutex_unlock(&priv->mutex);
2856                 return;
2857         }
2858
2859         iwl_set_rate(priv);
2860
2861         mutex_unlock(&priv->mutex);
2862
2863         IWL_DEBUG_MAC80211(priv, "leave\n");
2864 }
2865
2866 static int iwl_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb)
2867 {
2868         struct iwl_priv *priv = hw->priv;
2869         unsigned long flags;
2870         __le64 timestamp;
2871
2872         IWL_DEBUG_MAC80211(priv, "enter\n");
2873
2874         if (!iwl_is_ready_rf(priv)) {
2875                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
2876                 return -EIO;
2877         }
2878
2879         if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
2880                 IWL_DEBUG_MAC80211(priv, "leave - not IBSS\n");
2881                 return -EIO;
2882         }
2883
2884         spin_lock_irqsave(&priv->lock, flags);
2885
2886         if (priv->ibss_beacon)
2887                 dev_kfree_skb(priv->ibss_beacon);
2888
2889         priv->ibss_beacon = skb;
2890
2891         priv->assoc_id = 0;
2892         timestamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
2893         priv->timestamp = le64_to_cpu(timestamp);
2894
2895         IWL_DEBUG_MAC80211(priv, "leave\n");
2896         spin_unlock_irqrestore(&priv->lock, flags);
2897
2898         iwl_reset_qos(priv);
2899
2900         iwl_post_associate(priv);
2901
2902
2903         return 0;
2904 }
2905
2906 /*****************************************************************************
2907  *
2908  * sysfs attributes
2909  *
2910  *****************************************************************************/
2911
2912 #ifdef CONFIG_IWLWIFI_DEBUG
2913
2914 /*
2915  * The following adds a new attribute to the sysfs representation
2916  * of this device driver (i.e. a new file in /sys/class/net/wlan0/device/)
2917  * used for controlling the debug level.
2918  *
2919  * See the level definitions in iwl for details.
2920  */
2921
2922 static ssize_t show_debug_level(struct device *d,
2923                                 struct device_attribute *attr, char *buf)
2924 {
2925         struct iwl_priv *priv = d->driver_data;
2926
2927         return sprintf(buf, "0x%08X\n", priv->debug_level);
2928 }
2929 static ssize_t store_debug_level(struct device *d,
2930                                 struct device_attribute *attr,
2931                                  const char *buf, size_t count)
2932 {
2933         struct iwl_priv *priv = d->driver_data;
2934         unsigned long val;
2935         int ret;
2936
2937         ret = strict_strtoul(buf, 0, &val);
2938         if (ret)
2939                 IWL_ERR(priv, "%s is not in hex or decimal form.\n", buf);
2940         else
2941                 priv->debug_level = val;
2942
2943         return strnlen(buf, count);
2944 }
2945
2946 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
2947                         show_debug_level, store_debug_level);
2948
2949
2950 #endif /* CONFIG_IWLWIFI_DEBUG */
2951
2952
2953 static ssize_t show_version(struct device *d,
2954                                 struct device_attribute *attr, char *buf)
2955 {
2956         struct iwl_priv *priv = d->driver_data;
2957         struct iwl_alive_resp *palive = &priv->card_alive;
2958         ssize_t pos = 0;
2959         u16 eeprom_ver;
2960
2961         if (palive->is_valid)
2962                 pos += sprintf(buf + pos,
2963                                 "fw version: 0x%01X.0x%01X.0x%01X.0x%01X\n"
2964                                 "fw type: 0x%01X 0x%01X\n",
2965                                 palive->ucode_major, palive->ucode_minor,
2966                                 palive->sw_rev[0], palive->sw_rev[1],
2967                                 palive->ver_type, palive->ver_subtype);
2968         else
2969                 pos += sprintf(buf + pos, "fw not loaded\n");
2970
2971         if (priv->eeprom) {
2972                 eeprom_ver = iwl_eeprom_query16(priv, EEPROM_VERSION);
2973                 pos += sprintf(buf + pos, "EEPROM version: 0x%x\n",
2974                                  eeprom_ver);
2975         } else {
2976                 pos += sprintf(buf + pos, "EEPROM not initialzed\n");
2977         }
2978
2979         return pos;
2980 }
2981
2982 static DEVICE_ATTR(version, S_IWUSR | S_IRUGO, show_version, NULL);
2983
2984 static ssize_t show_temperature(struct device *d,
2985                                 struct device_attribute *attr, char *buf)
2986 {
2987         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
2988
2989         if (!iwl_is_alive(priv))
2990                 return -EAGAIN;
2991
2992         return sprintf(buf, "%d\n", priv->temperature);
2993 }
2994
2995 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
2996
2997 static ssize_t show_tx_power(struct device *d,
2998                              struct device_attribute *attr, char *buf)
2999 {
3000         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3001
3002         if (!iwl_is_ready_rf(priv))
3003                 return sprintf(buf, "off\n");
3004         else
3005                 return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
3006 }
3007
3008 static ssize_t store_tx_power(struct device *d,
3009                               struct device_attribute *attr,
3010                               const char *buf, size_t count)
3011 {
3012         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3013         unsigned long val;
3014         int ret;
3015
3016         ret = strict_strtoul(buf, 10, &val);
3017         if (ret)
3018                 IWL_INFO(priv, "%s is not in decimal form.\n", buf);
3019         else
3020                 iwl_set_tx_power(priv, val, false);
3021
3022         return count;
3023 }
3024
3025 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
3026
3027 static ssize_t show_flags(struct device *d,
3028                           struct device_attribute *attr, char *buf)
3029 {
3030         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3031
3032         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
3033 }
3034
3035 static ssize_t store_flags(struct device *d,
3036                            struct device_attribute *attr,
3037                            const char *buf, size_t count)
3038 {
3039         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3040         unsigned long val;
3041         u32 flags;
3042         int ret = strict_strtoul(buf, 0, &val);
3043         if (ret)
3044                 return ret;
3045         flags = (u32)val;
3046
3047         mutex_lock(&priv->mutex);
3048         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
3049                 /* Cancel any currently running scans... */
3050                 if (iwl_scan_cancel_timeout(priv, 100))
3051                         IWL_WARN(priv, "Could not cancel scan.\n");
3052                 else {
3053                         IWL_DEBUG_INFO(priv, "Commit rxon.flags = 0x%04X\n", flags);
3054                         priv->staging_rxon.flags = cpu_to_le32(flags);
3055                         iwl_commit_rxon(priv);
3056                 }
3057         }
3058         mutex_unlock(&priv->mutex);
3059
3060         return count;
3061 }
3062
3063 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
3064
3065 static ssize_t show_filter_flags(struct device *d,
3066                                  struct device_attribute *attr, char *buf)
3067 {
3068         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3069
3070         return sprintf(buf, "0x%04X\n",
3071                 le32_to_cpu(priv->active_rxon.filter_flags));
3072 }
3073
3074 static ssize_t store_filter_flags(struct device *d,
3075                                   struct device_attribute *attr,
3076                                   const char *buf, size_t count)
3077 {
3078         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3079         unsigned long val;
3080         u32 filter_flags;
3081         int ret = strict_strtoul(buf, 0, &val);
3082         if (ret)
3083                 return ret;
3084         filter_flags = (u32)val;
3085
3086         mutex_lock(&priv->mutex);
3087         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
3088                 /* Cancel any currently running scans... */
3089                 if (iwl_scan_cancel_timeout(priv, 100))
3090                         IWL_WARN(priv, "Could not cancel scan.\n");
3091                 else {
3092                         IWL_DEBUG_INFO(priv, "Committing rxon.filter_flags = "
3093                                        "0x%04X\n", filter_flags);
3094                         priv->staging_rxon.filter_flags =
3095                                 cpu_to_le32(filter_flags);
3096                         iwl_commit_rxon(priv);
3097                 }
3098         }
3099         mutex_unlock(&priv->mutex);
3100
3101         return count;
3102 }
3103
3104 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
3105                    store_filter_flags);
3106
3107 static ssize_t store_power_level(struct device *d,
3108                                  struct device_attribute *attr,
3109                                  const char *buf, size_t count)
3110 {
3111         struct iwl_priv *priv = dev_get_drvdata(d);
3112         int ret;
3113         unsigned long mode;
3114
3115
3116         mutex_lock(&priv->mutex);
3117
3118         if (!iwl_is_ready(priv)) {
3119                 ret = -EAGAIN;
3120                 goto out;
3121         }
3122
3123         ret = strict_strtoul(buf, 10, &mode);
3124         if (ret)
3125                 goto out;
3126
3127         ret = iwl_power_set_user_mode(priv, mode);
3128         if (ret) {
3129                 IWL_DEBUG_MAC80211(priv, "failed setting power mode.\n");
3130                 goto out;
3131         }
3132         ret = count;
3133
3134  out:
3135         mutex_unlock(&priv->mutex);
3136         return ret;
3137 }
3138
3139 static ssize_t show_power_level(struct device *d,
3140                                 struct device_attribute *attr, char *buf)
3141 {
3142         struct iwl_priv *priv = dev_get_drvdata(d);
3143         int mode = priv->power_data.user_power_setting;
3144         int system = priv->power_data.system_power_setting;
3145         int level = priv->power_data.power_mode;
3146         char *p = buf;
3147
3148         switch (system) {
3149         case IWL_POWER_SYS_AUTO:
3150                 p += sprintf(p, "SYSTEM:auto");
3151                 break;
3152         case IWL_POWER_SYS_AC:
3153                 p += sprintf(p, "SYSTEM:ac");
3154                 break;
3155         case IWL_POWER_SYS_BATTERY:
3156                 p += sprintf(p, "SYSTEM:battery");
3157                 break;
3158         }
3159
3160         p += sprintf(p, "\tMODE:%s", (mode < IWL_POWER_AUTO) ?
3161                         "fixed" : "auto");
3162         p += sprintf(p, "\tINDEX:%d", level);
3163         p += sprintf(p, "\n");
3164         return p - buf + 1;
3165 }
3166
3167 static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR, show_power_level,
3168                    store_power_level);
3169
3170
3171 static ssize_t show_statistics(struct device *d,
3172                                struct device_attribute *attr, char *buf)
3173 {
3174         struct iwl_priv *priv = dev_get_drvdata(d);
3175         u32 size = sizeof(struct iwl_notif_statistics);
3176         u32 len = 0, ofs = 0;
3177         u8 *data = (u8 *)&priv->statistics;
3178         int rc = 0;
3179
3180         if (!iwl_is_alive(priv))
3181                 return -EAGAIN;
3182
3183         mutex_lock(&priv->mutex);
3184         rc = iwl_send_statistics_request(priv, 0);
3185         mutex_unlock(&priv->mutex);
3186
3187         if (rc) {
3188                 len = sprintf(buf,
3189                               "Error sending statistics request: 0x%08X\n", rc);
3190                 return len;
3191         }
3192
3193         while (size && (PAGE_SIZE - len)) {
3194                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3195                                    PAGE_SIZE - len, 1);
3196                 len = strlen(buf);
3197                 if (PAGE_SIZE - len)
3198                         buf[len++] = '\n';
3199
3200                 ofs += 16;
3201                 size -= min(size, 16U);
3202         }
3203
3204         return len;
3205 }
3206
3207 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
3208
3209
3210 /*****************************************************************************
3211  *
3212  * driver setup and teardown
3213  *
3214  *****************************************************************************/
3215
3216 static void iwl_setup_deferred_work(struct iwl_priv *priv)
3217 {
3218         priv->workqueue = create_singlethread_workqueue(DRV_NAME);
3219
3220         init_waitqueue_head(&priv->wait_command_queue);
3221
3222         INIT_WORK(&priv->up, iwl_bg_up);
3223         INIT_WORK(&priv->restart, iwl_bg_restart);
3224         INIT_WORK(&priv->rx_replenish, iwl_bg_rx_replenish);
3225         INIT_WORK(&priv->rf_kill, iwl_bg_rf_kill);
3226         INIT_WORK(&priv->beacon_update, iwl_bg_beacon_update);
3227         INIT_WORK(&priv->run_time_calib_work, iwl_bg_run_time_calib_work);
3228         INIT_DELAYED_WORK(&priv->init_alive_start, iwl_bg_init_alive_start);
3229         INIT_DELAYED_WORK(&priv->alive_start, iwl_bg_alive_start);
3230
3231         iwl_setup_scan_deferred_work(priv);
3232         iwl_setup_power_deferred_work(priv);
3233
3234         if (priv->cfg->ops->lib->setup_deferred_work)
3235                 priv->cfg->ops->lib->setup_deferred_work(priv);
3236
3237         init_timer(&priv->statistics_periodic);
3238         priv->statistics_periodic.data = (unsigned long)priv;
3239         priv->statistics_periodic.function = iwl_bg_statistics_periodic;
3240
3241         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
3242                      iwl_irq_tasklet, (unsigned long)priv);
3243 }
3244
3245 static void iwl_cancel_deferred_work(struct iwl_priv *priv)
3246 {
3247         if (priv->cfg->ops->lib->cancel_deferred_work)
3248                 priv->cfg->ops->lib->cancel_deferred_work(priv);
3249
3250         cancel_delayed_work_sync(&priv->init_alive_start);
3251         cancel_delayed_work(&priv->scan_check);
3252         cancel_delayed_work_sync(&priv->set_power_save);
3253         cancel_delayed_work(&priv->alive_start);
3254         cancel_work_sync(&priv->beacon_update);
3255         del_timer_sync(&priv->statistics_periodic);
3256 }
3257
3258 static struct attribute *iwl_sysfs_entries[] = {
3259         &dev_attr_flags.attr,
3260         &dev_attr_filter_flags.attr,
3261         &dev_attr_power_level.attr,
3262         &dev_attr_statistics.attr,
3263         &dev_attr_temperature.attr,
3264         &dev_attr_tx_power.attr,
3265 #ifdef CONFIG_IWLWIFI_DEBUG
3266         &dev_attr_debug_level.attr,
3267 #endif
3268         &dev_attr_version.attr,
3269
3270         NULL
3271 };
3272
3273 static struct attribute_group iwl_attribute_group = {
3274         .name = NULL,           /* put in device directory */
3275         .attrs = iwl_sysfs_entries,
3276 };
3277
3278 static struct ieee80211_ops iwl_hw_ops = {
3279         .tx = iwl_mac_tx,
3280         .start = iwl_mac_start,
3281         .stop = iwl_mac_stop,
3282         .add_interface = iwl_mac_add_interface,
3283         .remove_interface = iwl_mac_remove_interface,
3284         .config = iwl_mac_config,
3285         .config_interface = iwl_mac_config_interface,
3286         .configure_filter = iwl_configure_filter,
3287         .set_key = iwl_mac_set_key,
3288         .update_tkip_key = iwl_mac_update_tkip_key,
3289         .get_stats = iwl_mac_get_stats,
3290         .get_tx_stats = iwl_mac_get_tx_stats,
3291         .conf_tx = iwl_mac_conf_tx,
3292         .reset_tsf = iwl_mac_reset_tsf,
3293         .bss_info_changed = iwl_bss_info_changed,
3294         .ampdu_action = iwl_mac_ampdu_action,
3295         .hw_scan = iwl_mac_hw_scan
3296 };
3297
3298 static int iwl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3299 {
3300         int err = 0;
3301         struct iwl_priv *priv;
3302         struct ieee80211_hw *hw;
3303         struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
3304         unsigned long flags;
3305         u16 pci_cmd;
3306
3307         /************************
3308          * 1. Allocating HW data
3309          ************************/
3310
3311         /* Disabling hardware scan means that mac80211 will perform scans
3312          * "the hard way", rather than using device's scan. */
3313         if (cfg->mod_params->disable_hw_scan) {
3314                 if (cfg->mod_params->debug & IWL_DL_INFO)
3315                         dev_printk(KERN_DEBUG, &(pdev->dev),
3316                                    "Disabling hw_scan\n");
3317                 iwl_hw_ops.hw_scan = NULL;
3318         }
3319
3320         hw = iwl_alloc_all(cfg, &iwl_hw_ops);
3321         if (!hw) {
3322                 err = -ENOMEM;
3323                 goto out;
3324         }
3325         priv = hw->priv;
3326         /* At this point both hw and priv are allocated. */
3327
3328         SET_IEEE80211_DEV(hw, &pdev->dev);
3329
3330         IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
3331         priv->cfg = cfg;
3332         priv->pci_dev = pdev;
3333
3334 #ifdef CONFIG_IWLWIFI_DEBUG
3335         priv->debug_level = priv->cfg->mod_params->debug;
3336         atomic_set(&priv->restrict_refcnt, 0);
3337 #endif
3338
3339         /**************************
3340          * 2. Initializing PCI bus
3341          **************************/
3342         if (pci_enable_device(pdev)) {
3343                 err = -ENODEV;
3344                 goto out_ieee80211_free_hw;
3345         }
3346
3347         pci_set_master(pdev);
3348
3349         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(36));
3350         if (!err)
3351                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(36));
3352         if (err) {
3353                 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
3354                 if (!err)
3355                         err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
3356                 /* both attempts failed: */
3357                 if (err) {
3358                         IWL_WARN(priv, "No suitable DMA available.\n");
3359                         goto out_pci_disable_device;
3360                 }
3361         }
3362
3363         err = pci_request_regions(pdev, DRV_NAME);
3364         if (err)
3365                 goto out_pci_disable_device;
3366
3367         pci_set_drvdata(pdev, priv);
3368
3369
3370         /***********************
3371          * 3. Read REV register
3372          ***********************/
3373         priv->hw_base = pci_iomap(pdev, 0, 0);
3374         if (!priv->hw_base) {
3375                 err = -ENODEV;
3376                 goto out_pci_release_regions;
3377         }
3378
3379         IWL_DEBUG_INFO(priv, "pci_resource_len = 0x%08llx\n",
3380                 (unsigned long long) pci_resource_len(pdev, 0));
3381         IWL_DEBUG_INFO(priv, "pci_resource_base = %p\n", priv->hw_base);
3382
3383         iwl_hw_detect(priv);
3384         IWL_INFO(priv, "Detected Intel Wireless WiFi Link %s REV=0x%X\n",
3385                 priv->cfg->name, priv->hw_rev);
3386
3387         /* We disable the RETRY_TIMEOUT register (0x41) to keep
3388          * PCI Tx retries from interfering with C3 CPU state */
3389         pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
3390
3391         /* amp init */
3392         err = priv->cfg->ops->lib->apm_ops.init(priv);
3393         if (err < 0) {
3394                 IWL_DEBUG_INFO(priv, "Failed to init APMG\n");
3395                 goto out_iounmap;
3396         }
3397         /*****************
3398          * 4. Read EEPROM
3399          *****************/
3400         /* Read the EEPROM */
3401         err = iwl_eeprom_init(priv);
3402         if (err) {
3403                 IWL_ERR(priv, "Unable to init EEPROM\n");
3404                 goto out_iounmap;
3405         }
3406         err = iwl_eeprom_check_version(priv);
3407         if (err)
3408                 goto out_free_eeprom;
3409
3410         /* extract MAC Address */
3411         iwl_eeprom_get_mac(priv, priv->mac_addr);
3412         IWL_DEBUG_INFO(priv, "MAC address: %pM\n", priv->mac_addr);
3413         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
3414
3415         /************************
3416          * 5. Setup HW constants
3417          ************************/
3418         if (iwl_set_hw_params(priv)) {
3419                 IWL_ERR(priv, "failed to set hw parameters\n");
3420                 goto out_free_eeprom;
3421         }
3422
3423         /*******************
3424          * 6. Setup priv
3425          *******************/
3426
3427         err = iwl_init_drv(priv);
3428         if (err)
3429                 goto out_free_eeprom;
3430         /* At this point both hw and priv are initialized. */
3431
3432         /**********************************
3433          * 7. Initialize module parameters
3434          **********************************/
3435
3436         /* Disable radio (SW RF KILL) via parameter when loading driver */
3437         if (priv->cfg->mod_params->disable) {
3438                 set_bit(STATUS_RF_KILL_SW, &priv->status);
3439                 IWL_DEBUG_INFO(priv, "Radio disabled.\n");
3440         }
3441
3442         /********************
3443          * 8. Setup services
3444          ********************/
3445         spin_lock_irqsave(&priv->lock, flags);
3446         iwl_disable_interrupts(priv);
3447         spin_unlock_irqrestore(&priv->lock, flags);
3448
3449         pci_enable_msi(priv->pci_dev);
3450
3451         err = request_irq(priv->pci_dev->irq, iwl_isr, IRQF_SHARED,
3452                           DRV_NAME, priv);
3453         if (err) {
3454                 IWL_ERR(priv, "Error allocating IRQ %d\n", priv->pci_dev->irq);
3455                 goto out_disable_msi;
3456         }
3457         err = sysfs_create_group(&pdev->dev.kobj, &iwl_attribute_group);
3458         if (err) {
3459                 IWL_ERR(priv, "failed to create sysfs device attributes\n");
3460                 goto out_free_irq;
3461         }
3462
3463         iwl_setup_deferred_work(priv);
3464         iwl_setup_rx_handlers(priv);
3465
3466         /**********************************
3467          * 9. Setup and register mac80211
3468          **********************************/
3469
3470         /* enable interrupts if needed: hw bug w/a */
3471         pci_read_config_word(priv->pci_dev, PCI_COMMAND, &pci_cmd);
3472         if (pci_cmd & PCI_COMMAND_INTX_DISABLE) {
3473                 pci_cmd &= ~PCI_COMMAND_INTX_DISABLE;
3474                 pci_write_config_word(priv->pci_dev, PCI_COMMAND, pci_cmd);
3475         }
3476
3477         iwl_enable_interrupts(priv);
3478
3479         err = iwl_setup_mac(priv);
3480         if (err)
3481                 goto out_remove_sysfs;
3482
3483         err = iwl_dbgfs_register(priv, DRV_NAME);
3484         if (err)
3485                 IWL_ERR(priv, "failed to create debugfs files\n");
3486
3487         /* If platform's RF_KILL switch is NOT set to KILL */
3488         if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
3489                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
3490         else
3491                 set_bit(STATUS_RF_KILL_HW, &priv->status);
3492
3493         err = iwl_rfkill_init(priv);
3494         if (err)
3495                 IWL_ERR(priv, "Unable to initialize RFKILL system. "
3496                                   "Ignoring error: %d\n", err);
3497         else
3498                 iwl_rfkill_set_hw_state(priv);
3499
3500         iwl_power_initialize(priv);
3501         return 0;
3502
3503  out_remove_sysfs:
3504         destroy_workqueue(priv->workqueue);
3505         priv->workqueue = NULL;
3506         sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
3507  out_free_irq:
3508         free_irq(priv->pci_dev->irq, priv);
3509  out_disable_msi:
3510         pci_disable_msi(priv->pci_dev);
3511         iwl_uninit_drv(priv);
3512  out_free_eeprom:
3513         iwl_eeprom_free(priv);
3514  out_iounmap:
3515         pci_iounmap(pdev, priv->hw_base);
3516  out_pci_release_regions:
3517         pci_release_regions(pdev);
3518         pci_set_drvdata(pdev, NULL);
3519  out_pci_disable_device:
3520         pci_disable_device(pdev);
3521  out_ieee80211_free_hw:
3522         ieee80211_free_hw(priv->hw);
3523  out:
3524         return err;
3525 }
3526
3527 static void __devexit iwl_pci_remove(struct pci_dev *pdev)
3528 {
3529         struct iwl_priv *priv = pci_get_drvdata(pdev);
3530         unsigned long flags;
3531
3532         if (!priv)
3533                 return;
3534
3535         IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
3536
3537         iwl_dbgfs_unregister(priv);
3538         sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
3539
3540         /* ieee80211_unregister_hw call wil cause iwl_mac_stop to
3541          * to be called and iwl_down since we are removing the device
3542          * we need to set STATUS_EXIT_PENDING bit.
3543          */
3544         set_bit(STATUS_EXIT_PENDING, &priv->status);
3545         if (priv->mac80211_registered) {
3546                 ieee80211_unregister_hw(priv->hw);
3547                 priv->mac80211_registered = 0;
3548         } else {
3549                 iwl_down(priv);
3550         }
3551
3552         /* make sure we flush any pending irq or
3553          * tasklet for the driver
3554          */
3555         spin_lock_irqsave(&priv->lock, flags);
3556         iwl_disable_interrupts(priv);
3557         spin_unlock_irqrestore(&priv->lock, flags);
3558
3559         iwl_synchronize_irq(priv);
3560
3561         iwl_rfkill_unregister(priv);
3562         iwl_dealloc_ucode_pci(priv);
3563
3564         if (priv->rxq.bd)
3565                 iwl_rx_queue_free(priv, &priv->rxq);
3566         iwl_hw_txq_ctx_free(priv);
3567
3568         iwl_clear_stations_table(priv);
3569         iwl_eeprom_free(priv);
3570
3571
3572         /*netif_stop_queue(dev); */
3573         flush_workqueue(priv->workqueue);
3574
3575         /* ieee80211_unregister_hw calls iwl_mac_stop, which flushes
3576          * priv->workqueue... so we can't take down the workqueue
3577          * until now... */
3578         destroy_workqueue(priv->workqueue);
3579         priv->workqueue = NULL;
3580
3581         free_irq(priv->pci_dev->irq, priv);
3582         pci_disable_msi(priv->pci_dev);
3583         pci_iounmap(pdev, priv->hw_base);
3584         pci_release_regions(pdev);
3585         pci_disable_device(pdev);
3586         pci_set_drvdata(pdev, NULL);
3587
3588         iwl_uninit_drv(priv);
3589
3590         if (priv->ibss_beacon)
3591                 dev_kfree_skb(priv->ibss_beacon);
3592
3593         ieee80211_free_hw(priv->hw);
3594 }
3595
3596 #ifdef CONFIG_PM
3597
3598 static int iwl_pci_suspend(struct pci_dev *pdev, pm_message_t state)
3599 {
3600         struct iwl_priv *priv = pci_get_drvdata(pdev);
3601
3602         if (priv->is_open) {
3603                 set_bit(STATUS_IN_SUSPEND, &priv->status);
3604                 iwl_mac_stop(priv->hw);
3605                 priv->is_open = 1;
3606         }
3607
3608         pci_save_state(pdev);
3609         pci_disable_device(pdev);
3610         pci_set_power_state(pdev, PCI_D3hot);
3611
3612         return 0;
3613 }
3614
3615 static int iwl_pci_resume(struct pci_dev *pdev)
3616 {
3617         struct iwl_priv *priv = pci_get_drvdata(pdev);
3618         int ret;
3619
3620         pci_set_power_state(pdev, PCI_D0);
3621         ret = pci_enable_device(pdev);
3622         if (ret)
3623                 return ret;
3624         pci_restore_state(pdev);
3625         iwl_enable_interrupts(priv);
3626
3627         if (priv->is_open)
3628                 iwl_mac_start(priv->hw);
3629
3630         clear_bit(STATUS_IN_SUSPEND, &priv->status);
3631         return 0;
3632 }
3633
3634 #endif /* CONFIG_PM */
3635
3636 /*****************************************************************************
3637  *
3638  * driver and module entry point
3639  *
3640  *****************************************************************************/
3641
3642 /* Hardware specific file defines the PCI IDs table for that hardware module */
3643 static struct pci_device_id iwl_hw_card_ids[] = {
3644 #ifdef CONFIG_IWL4965
3645         {IWL_PCI_DEVICE(0x4229, PCI_ANY_ID, iwl4965_agn_cfg)},
3646         {IWL_PCI_DEVICE(0x4230, PCI_ANY_ID, iwl4965_agn_cfg)},
3647 #endif /* CONFIG_IWL4965 */
3648 #ifdef CONFIG_IWL5000
3649         {IWL_PCI_DEVICE(0x4232, 0x1205, iwl5100_bg_cfg)},
3650         {IWL_PCI_DEVICE(0x4232, 0x1305, iwl5100_bg_cfg)},
3651         {IWL_PCI_DEVICE(0x4232, 0x1206, iwl5100_abg_cfg)},
3652         {IWL_PCI_DEVICE(0x4232, 0x1306, iwl5100_abg_cfg)},
3653         {IWL_PCI_DEVICE(0x4232, 0x1326, iwl5100_abg_cfg)},
3654         {IWL_PCI_DEVICE(0x4237, 0x1216, iwl5100_abg_cfg)},
3655         {IWL_PCI_DEVICE(0x4232, PCI_ANY_ID, iwl5100_agn_cfg)},
3656         {IWL_PCI_DEVICE(0x4235, PCI_ANY_ID, iwl5300_agn_cfg)},
3657         {IWL_PCI_DEVICE(0x4236, PCI_ANY_ID, iwl5300_agn_cfg)},
3658         {IWL_PCI_DEVICE(0x4237, PCI_ANY_ID, iwl5100_agn_cfg)},
3659 /* 5350 WiFi/WiMax */
3660         {IWL_PCI_DEVICE(0x423A, 0x1001, iwl5350_agn_cfg)},
3661         {IWL_PCI_DEVICE(0x423A, 0x1021, iwl5350_agn_cfg)},
3662         {IWL_PCI_DEVICE(0x423B, 0x1011, iwl5350_agn_cfg)},
3663 /* 5150 Wifi/WiMax */
3664         {IWL_PCI_DEVICE(0x423C, PCI_ANY_ID, iwl5150_agn_cfg)},
3665         {IWL_PCI_DEVICE(0x423D, PCI_ANY_ID, iwl5150_agn_cfg)},
3666 /* 6000/6050 Series */
3667         {IWL_PCI_DEVICE(0x0082, 0x1102, iwl6000_2ag_cfg)},
3668         {IWL_PCI_DEVICE(0x0085, 0x1112, iwl6000_2ag_cfg)},
3669         {IWL_PCI_DEVICE(0x0082, 0x1122, iwl6000_2ag_cfg)},
3670         {IWL_PCI_DEVICE(0x422B, PCI_ANY_ID, iwl6000_3agn_cfg)},
3671         {IWL_PCI_DEVICE(0x4238, PCI_ANY_ID, iwl6000_3agn_cfg)},
3672         {IWL_PCI_DEVICE(0x0082, PCI_ANY_ID, iwl6000_2agn_cfg)},
3673         {IWL_PCI_DEVICE(0x0085, PCI_ANY_ID, iwl6000_3agn_cfg)},
3674         {IWL_PCI_DEVICE(0x0086, PCI_ANY_ID, iwl6050_3agn_cfg)},
3675         {IWL_PCI_DEVICE(0x0087, PCI_ANY_ID, iwl6050_2agn_cfg)},
3676         {IWL_PCI_DEVICE(0x0088, PCI_ANY_ID, iwl6050_3agn_cfg)},
3677         {IWL_PCI_DEVICE(0x0089, PCI_ANY_ID, iwl6050_2agn_cfg)},
3678 /* 100 Series WiFi */
3679         {IWL_PCI_DEVICE(0x0083, PCI_ANY_ID, iwl100_bgn_cfg)},
3680         {IWL_PCI_DEVICE(0x0084, PCI_ANY_ID, iwl100_bgn_cfg)},
3681 #endif /* CONFIG_IWL5000 */
3682
3683         {0}
3684 };
3685 MODULE_DEVICE_TABLE(pci, iwl_hw_card_ids);
3686
3687 static struct pci_driver iwl_driver = {
3688         .name = DRV_NAME,
3689         .id_table = iwl_hw_card_ids,
3690         .probe = iwl_pci_probe,
3691         .remove = __devexit_p(iwl_pci_remove),
3692 #ifdef CONFIG_PM
3693         .suspend = iwl_pci_suspend,
3694         .resume = iwl_pci_resume,
3695 #endif
3696 };
3697
3698 static int __init iwl_init(void)
3699 {
3700
3701         int ret;
3702         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
3703         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
3704
3705         ret = iwlagn_rate_control_register();
3706         if (ret) {
3707                 printk(KERN_ERR DRV_NAME
3708                        "Unable to register rate control algorithm: %d\n", ret);
3709                 return ret;
3710         }
3711
3712         ret = pci_register_driver(&iwl_driver);
3713         if (ret) {
3714                 printk(KERN_ERR DRV_NAME "Unable to initialize PCI module\n");
3715                 goto error_register;
3716         }
3717
3718         return ret;
3719
3720 error_register:
3721         iwlagn_rate_control_unregister();
3722         return ret;
3723 }
3724
3725 static void __exit iwl_exit(void)
3726 {
3727         pci_unregister_driver(&iwl_driver);
3728         iwlagn_rate_control_unregister();
3729 }
3730
3731 module_exit(iwl_exit);
3732 module_init(iwl_init);