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

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2009 Intel Corporation. All rights reserved.
   4  *
   5  * Portions of this file are derived from the ipw3945 project, as well
   6  * as portions of the ieee80211 subsystem header files.
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of version 2 of the GNU General Public License as
  10  * published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  20  *
  21  * The full GNU General Public License is included in this distribution in the
  22  * file called LICENSE.
  23  *
  24  * Contact Information:
  25  *  Intel Linux Wireless <ilw@linux.intel.com>
  26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27  *
  28  *****************************************************************************/
  29
  30 #include <linux/kernel.h>
  31 #include <linux/module.h>
  32 #include <linux/init.h>
  33 #include <linux/pci.h>
  34 #include <linux/dma-mapping.h>
  35 #include <linux/delay.h>
  36 #include <linux/skbuff.h>
  37 #include <linux/netdevice.h>
  38 #include <linux/wireless.h>
  39 #include <linux/firmware.h>
  40 #include <linux/etherdevice.h>
  41 #include <linux/if_arp.h>
  42
  43 #include <net/mac80211.h>
  44
  45 #include <asm/div64.h>
  46
  47 #define DRV_NAME        "iwlagn"
  48
  49 #include "iwl-eeprom.h"
  50 #include "iwl-dev.h"
  51 #include "iwl-core.h"
  52 #include "iwl-io.h"
  53 #include "iwl-helpers.h"
  54 #include "iwl-sta.h"
  55 #include "iwl-calib.h"
  56
  57
  58 /******************************************************************************
  59  *
  60  * module boiler plate
  61  *
  62  ******************************************************************************/
  63
  64 /*
  65  * module name, copyright, version, etc.
  66  */
  67 #define DRV_DESCRIPTION "Intel(R) Wireless WiFi Link AGN driver for Linux"
  68
  69 #ifdef CONFIG_IWLWIFI_DEBUG
  70 #define VD "d"
  71 #else
  72 #define VD
  73 #endif
  74
  75 #ifdef CONFIG_IWLWIFI_SPECTRUM_MEASUREMENT
  76 #define VS "s"
  77 #else
  78 #define VS
  79 #endif
  80
  81 #define DRV_VERSION     IWLWIFI_VERSION VD VS
  82
  83
  84 MODULE_DESCRIPTION(DRV_DESCRIPTION);
  85 MODULE_VERSION(DRV_VERSION);
  86 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
  87 MODULE_LICENSE("GPL");
  88 MODULE_ALIAS("iwl4965");
  89
  90 /*************** STATION TABLE MANAGEMENT ****
  91  * mac80211 should be examined to determine if sta_info is duplicating
  92  * the functionality provided here
  93  */
  94
  95 /**************************************************************/
  96
  97 /**
  98  * iwl_commit_rxon - commit staging_rxon to hardware
  99  *
 100  * The RXON command in staging_rxon is committed to the hardware and
 101  * the active_rxon structure is updated with the new data.  This
 102  * function correctly transitions out of the RXON_ASSOC_MSK state if
 103  * a HW tune is required based on the RXON structure changes.
 104  */
 105 static int iwl_commit_rxon(struct iwl_priv *priv)
 106 {
 107         /* cast away the const for active_rxon in this function */
 108         struct iwl_rxon_cmd *active_rxon = (void *)&priv->active_rxon;
 109         int ret;
 110         bool new_assoc =
 111                 !!(priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK);
 112
 113         if (!iwl_is_alive(priv))
 114                 return -EBUSY;
 115
 116         /* always get timestamp with Rx frame */
 117         priv->staging_rxon.flags |= RXON_FLG_TSF2HOST_MSK;
 118         /* allow CTS-to-self if possible. this is relevant only for
 119          * 5000, but will not damage 4965 */
 120         priv->staging_rxon.flags |= RXON_FLG_SELF_CTS_EN;
 121
 122         ret = iwl_check_rxon_cmd(priv);
 123         if (ret) {
 124                 IWL_ERR(priv, "Invalid RXON configuration.  Not committing.\n");
 125                 return -EINVAL;
 126         }
 127
 128         /* If we don't need to send a full RXON, we can use
 129          * iwl_rxon_assoc_cmd which is used to reconfigure filter
 130          * and other flags for the current radio configuration. */
 131         if (!iwl_full_rxon_required(priv)) {
 132                 ret = iwl_send_rxon_assoc(priv);
 133                 if (ret) {
 134                         IWL_ERR(priv, "Error setting RXON_ASSOC (%d)\n", ret);
 135                         return ret;
 136                 }
 137
 138                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
 139                 return 0;
 140         }
 141
 142         /* station table will be cleared */
 143         priv->assoc_station_added = 0;
 144
 145         /* If we are currently associated and the new config requires
 146          * an RXON_ASSOC and the new config wants the associated mask enabled,
 147          * we must clear the associated from the active configuration
 148          * before we apply the new config */
 149         if (iwl_is_associated(priv) && new_assoc) {
 150                 IWL_DEBUG_INFO(priv, "Toggling associated bit on current RXON\n");
 151                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
 152
 153                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON,
 154                                       sizeof(struct iwl_rxon_cmd),
 155                                       &priv->active_rxon);
 156
 157                 /* If the mask clearing failed then we set
 158                  * active_rxon back to what it was previously */
 159                 if (ret) {
 160                         active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
 161                         IWL_ERR(priv, "Error clearing ASSOC_MSK (%d)\n", ret);
 162                         return ret;
 163                 }
 164         }
 165
 166         IWL_DEBUG_INFO(priv, "Sending RXON\n"
 167                        "* with%s RXON_FILTER_ASSOC_MSK\n"
 168                        "* channel = %d\n"
 169                        "* bssid = %pM\n",
 170                        (new_assoc ? "" : "out"),
 171                        le16_to_cpu(priv->staging_rxon.channel),
 172                        priv->staging_rxon.bssid_addr);
 173
 174         iwl_set_rxon_hwcrypto(priv, !priv->hw_params.sw_crypto);
 175
 176         /* Apply the new configuration
 177          * RXON unassoc clears the station table in uCode, send it before
 178          * we add the bcast station. If assoc bit is set, we will send RXON
 179          * after having added the bcast and bssid station.
 180          */
 181         if (!new_assoc) {
 182                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON,
 183                               sizeof(struct iwl_rxon_cmd), &priv->staging_rxon);
 184                 if (ret) {
 185                         IWL_ERR(priv, "Error setting new RXON (%d)\n", ret);
 186                         return ret;
 187                 }
 188                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
 189         }
 190
 191         iwl_clear_stations_table(priv);
 192
 193         if (!priv->error_recovering)
 194                 priv->start_calib = 0;
 195
 196         /* Add the broadcast address so we can send broadcast frames */
 197         if (iwl_rxon_add_station(priv, iwl_bcast_addr, 0) ==
 198                                                 IWL_INVALID_STATION) {
 199                 IWL_ERR(priv, "Error adding BROADCAST address for transmit.\n");
 200                 return -EIO;
 201         }
 202
 203         /* If we have set the ASSOC_MSK and we are in BSS mode then
 204          * add the IWL_AP_ID to the station rate table */
 205         if (new_assoc) {
 206                 if (priv->iw_mode == NL80211_IFTYPE_STATION) {
 207                         ret = iwl_rxon_add_station(priv,
 208                                            priv->active_rxon.bssid_addr, 1);
 209                         if (ret == IWL_INVALID_STATION) {
 210                                 IWL_ERR(priv,
 211                                         "Error adding AP address for TX.\n");
 212                                 return -EIO;
 213                         }
 214                         priv->assoc_station_added = 1;
 215                         if (priv->default_wep_key &&
 216                             iwl_send_static_wepkey_cmd(priv, 0))
 217                                 IWL_ERR(priv,
 218                                         "Could not send WEP static key.\n");
 219                 }
 220
 221                 /* Apply the new configuration
 222                  * RXON assoc doesn't clear the station table in uCode,
 223                  */
 224                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON,
 225                               sizeof(struct iwl_rxon_cmd), &priv->staging_rxon);
 226                 if (ret) {
 227                         IWL_ERR(priv, "Error setting new RXON (%d)\n", ret);
 228                         return ret;
 229                 }
 230                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
 231         }
 232
 233         iwl_init_sensitivity(priv);
 234
 235         /* If we issue a new RXON command which required a tune then we must
 236          * send a new TXPOWER command or we won't be able to Tx any frames */
 237         ret = iwl_set_tx_power(priv, priv->tx_power_user_lmt, true);
 238         if (ret) {
 239                 IWL_ERR(priv, "Error sending TX power (%d)\n", ret);
 240                 return ret;
 241         }
 242
 243         return 0;
 244 }
 245
 246 void iwl_update_chain_flags(struct iwl_priv *priv)
 247 {
 248
 249         iwl_set_rxon_chain(priv);
 250         iwl_commit_rxon(priv);
 251 }
 252
 253 static void iwl_clear_free_frames(struct iwl_priv *priv)
 254 {
 255         struct list_head *element;
 256
 257         IWL_DEBUG_INFO(priv, "%d frames on pre-allocated heap on clear.\n",
 258                        priv->frames_count);
 259
 260         while (!list_empty(&priv->free_frames)) {
 261                 element = priv->free_frames.next;
 262                 list_del(element);
 263                 kfree(list_entry(element, struct iwl_frame, list));
 264                 priv->frames_count--;
 265         }
 266
 267         if (priv->frames_count) {
 268                 IWL_WARN(priv, "%d frames still in use.  Did we lose one?\n",
 269                             priv->frames_count);
 270                 priv->frames_count = 0;
 271         }
 272 }
 273
 274 static struct iwl_frame *iwl_get_free_frame(struct iwl_priv *priv)
 275 {
 276         struct iwl_frame *frame;
 277         struct list_head *element;
 278         if (list_empty(&priv->free_frames)) {
 279                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
 280                 if (!frame) {
 281                         IWL_ERR(priv, "Could not allocate frame!\n");
 282                         return NULL;
 283                 }
 284
 285                 priv->frames_count++;
 286                 return frame;
 287         }
 288
 289         element = priv->free_frames.next;
 290         list_del(element);
 291         return list_entry(element, struct iwl_frame, list);
 292 }
 293
 294 static void iwl_free_frame(struct iwl_priv *priv, struct iwl_frame *frame)
 295 {
 296         memset(frame, 0, sizeof(*frame));
 297         list_add(&frame->list, &priv->free_frames);
 298 }
 299
 300 static unsigned int iwl_fill_beacon_frame(struct iwl_priv *priv,
 301                                           struct ieee80211_hdr *hdr,
 302                                           int left)
 303 {
 304         if (!iwl_is_associated(priv) || !priv->ibss_beacon ||
 305             ((priv->iw_mode != NL80211_IFTYPE_ADHOC) &&
 306              (priv->iw_mode != NL80211_IFTYPE_AP)))
 307                 return 0;
 308
 309         if (priv->ibss_beacon->len > left)
 310                 return 0;
 311
 312         memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
 313
 314         return priv->ibss_beacon->len;
 315 }
 316
 317 static unsigned int iwl_hw_get_beacon_cmd(struct iwl_priv *priv,
 318                                        struct iwl_frame *frame, u8 rate)
 319 {
 320         struct iwl_tx_beacon_cmd *tx_beacon_cmd;
 321         unsigned int frame_size;
 322
 323         tx_beacon_cmd = &frame->u.beacon;
 324         memset(tx_beacon_cmd, 0, sizeof(*tx_beacon_cmd));
 325
 326         tx_beacon_cmd->tx.sta_id = priv->hw_params.bcast_sta_id;
 327         tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
 328
 329         frame_size = iwl_fill_beacon_frame(priv, tx_beacon_cmd->frame,
 330                                 sizeof(frame->u) - sizeof(*tx_beacon_cmd));
 331
 332         BUG_ON(frame_size > MAX_MPDU_SIZE);
 333         tx_beacon_cmd->tx.len = cpu_to_le16((u16)frame_size);
 334
 335         if ((rate == IWL_RATE_1M_PLCP) || (rate >= IWL_RATE_2M_PLCP))
 336                 tx_beacon_cmd->tx.rate_n_flags =
 337                         iwl_hw_set_rate_n_flags(rate, RATE_MCS_CCK_MSK);
 338         else
 339                 tx_beacon_cmd->tx.rate_n_flags =
 340                         iwl_hw_set_rate_n_flags(rate, 0);
 341
 342         tx_beacon_cmd->tx.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK |
 343                                      TX_CMD_FLG_TSF_MSK |
 344                                      TX_CMD_FLG_STA_RATE_MSK;
 345
 346         return sizeof(*tx_beacon_cmd) + frame_size;
 347 }
 348 static int iwl_send_beacon_cmd(struct iwl_priv *priv)
 349 {
 350         struct iwl_frame *frame;
 351         unsigned int frame_size;
 352         int rc;
 353         u8 rate;
 354
 355         frame = iwl_get_free_frame(priv);
 356
 357         if (!frame) {
 358                 IWL_ERR(priv, "Could not obtain free frame buffer for beacon "
 359                           "command.\n");
 360                 return -ENOMEM;
 361         }
 362
 363         rate = iwl_rate_get_lowest_plcp(priv);
 364
 365         frame_size = iwl_hw_get_beacon_cmd(priv, frame, rate);
 366
 367         rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
 368                               &frame->u.cmd[0]);
 369
 370         iwl_free_frame(priv, frame);
 371
 372         return rc;
 373 }
 374
 375 static inline dma_addr_t iwl_tfd_tb_get_addr(struct iwl_tfd *tfd, u8 idx)
 376 {
 377         struct iwl_tfd_tb *tb = &tfd->tbs[idx];
 378
 379         dma_addr_t addr = get_unaligned_le32(&tb->lo);
 380         if (sizeof(dma_addr_t) > sizeof(u32))
 381                 addr |=
 382                 ((dma_addr_t)(le16_to_cpu(tb->hi_n_len) & 0xF) << 16) << 16;
 383
 384         return addr;
 385 }
 386
 387 static inline u16 iwl_tfd_tb_get_len(struct iwl_tfd *tfd, u8 idx)
 388 {
 389         struct iwl_tfd_tb *tb = &tfd->tbs[idx];
 390
 391         return le16_to_cpu(tb->hi_n_len) >> 4;
 392 }
 393
 394 static inline void iwl_tfd_set_tb(struct iwl_tfd *tfd, u8 idx,
 395                                   dma_addr_t addr, u16 len)
 396 {
 397         struct iwl_tfd_tb *tb = &tfd->tbs[idx];
 398         u16 hi_n_len = len << 4;
 399
 400         put_unaligned_le32(addr, &tb->lo);
 401         if (sizeof(dma_addr_t) > sizeof(u32))
 402                 hi_n_len |= ((addr >> 16) >> 16) & 0xF;
 403
 404         tb->hi_n_len = cpu_to_le16(hi_n_len);
 405
 406         tfd->num_tbs = idx + 1;
 407 }
 408
 409 static inline u8 iwl_tfd_get_num_tbs(struct iwl_tfd *tfd)
 410 {
 411         return tfd->num_tbs & 0x1f;
 412 }
 413
 414 /**
 415  * iwl_hw_txq_free_tfd - Free all chunks referenced by TFD [txq->q.read_ptr]
 416  * @priv - driver private data
 417  * @txq - tx queue
 418  *
 419  * Does NOT advance any TFD circular buffer read/write indexes
 420  * Does NOT free the TFD itself (which is within circular buffer)
 421  */
 422 void iwl_hw_txq_free_tfd(struct iwl_priv *priv, struct iwl_tx_queue *txq)
 423 {
 424         struct iwl_tfd *tfd_tmp = (struct iwl_tfd *)txq->tfds;
 425         struct iwl_tfd *tfd;
 426         struct pci_dev *dev = priv->pci_dev;
 427         int index = txq->q.read_ptr;
 428         int i;
 429         int num_tbs;
 430
 431         tfd = &tfd_tmp[index];
 432
 433         /* Sanity check on number of chunks */
 434         num_tbs = iwl_tfd_get_num_tbs(tfd);
 435
 436         if (num_tbs >= IWL_NUM_OF_TBS) {
 437                 IWL_ERR(priv, "Too many chunks: %i\n", num_tbs);
 438                 /* @todo issue fatal error, it is quite serious situation */
 439                 return;
 440         }
 441
 442         /* Unmap tx_cmd */
 443         if (num_tbs)
 444                 pci_unmap_single(dev,
 445                                 pci_unmap_addr(&txq->cmd[index]->meta, mapping),
 446                                 pci_unmap_len(&txq->cmd[index]->meta, len),
 447                                 PCI_DMA_BIDIRECTIONAL);
 448
 449         /* Unmap chunks, if any. */
 450         for (i = 1; i < num_tbs; i++) {
 451                 pci_unmap_single(dev, iwl_tfd_tb_get_addr(tfd, i),
 452                                 iwl_tfd_tb_get_len(tfd, i), PCI_DMA_TODEVICE);
 453
 454                 if (txq->txb) {
 455                         dev_kfree_skb(txq->txb[txq->q.read_ptr].skb[i - 1]);
 456                         txq->txb[txq->q.read_ptr].skb[i - 1] = NULL;
 457                 }
 458         }
 459 }
 460
 461 int iwl_hw_txq_attach_buf_to_tfd(struct iwl_priv *priv,
 462                                  struct iwl_tx_queue *txq,
 463                                  dma_addr_t addr, u16 len,
 464                                  u8 reset, u8 pad)
 465 {
 466         struct iwl_queue *q;
 467         struct iwl_tfd *tfd, *tfd_tmp;
 468         u32 num_tbs;
 469
 470         q = &txq->q;
 471         tfd_tmp = (struct iwl_tfd *)txq->tfds;
 472         tfd = &tfd_tmp[q->write_ptr];
 473
 474         if (reset)
 475                 memset(tfd, 0, sizeof(*tfd));
 476
 477         num_tbs = iwl_tfd_get_num_tbs(tfd);
 478
 479         /* Each TFD can point to a maximum 20 Tx buffers */
 480         if (num_tbs >= IWL_NUM_OF_TBS) {
 481                 IWL_ERR(priv, "Error can not send more than %d chunks\n",
 482                           IWL_NUM_OF_TBS);
 483                 return -EINVAL;
 484         }
 485
 486         BUG_ON(addr & ~DMA_BIT_MASK(36));
 487         if (unlikely(addr & ~IWL_TX_DMA_MASK))
 488                 IWL_ERR(priv, "Unaligned address = %llx\n",
 489                           (unsigned long long)addr);
 490
 491         iwl_tfd_set_tb(tfd, num_tbs, addr, len);
 492
 493         return 0;
 494 }
 495
 496 /*
 497  * Tell nic where to find circular buffer of Tx Frame Descriptors for
 498  * given Tx queue, and enable the DMA channel used for that queue.
 499  *
 500  * 4965 supports up to 16 Tx queues in DRAM, mapped to up to 8 Tx DMA
 501  * channels supported in hardware.
 502  */
 503 int iwl_hw_tx_queue_init(struct iwl_priv *priv,
 504                          struct iwl_tx_queue *txq)
 505 {
 506         int ret;
 507         unsigned long flags;
 508         int txq_id = txq->q.id;
 509
 510         spin_lock_irqsave(&priv->lock, flags);
 511         ret = iwl_grab_nic_access(priv);
 512         if (ret) {
 513                 spin_unlock_irqrestore(&priv->lock, flags);
 514                 return ret;
 515         }
 516
 517         /* Circular buffer (TFD queue in DRAM) physical base address */
 518         iwl_write_direct32(priv, FH_MEM_CBBC_QUEUE(txq_id),
 519                              txq->q.dma_addr >> 8);
 520
 521         iwl_release_nic_access(priv);
 522         spin_unlock_irqrestore(&priv->lock, flags);
 523
 524         return 0;
 525 }
 526
 527
 528 /******************************************************************************
 529  *
 530  * Misc. internal state and helper functions
 531  *
 532  ******************************************************************************/
 533
 534 static void iwl_ht_conf(struct iwl_priv *priv,
 535                             struct ieee80211_bss_conf *bss_conf)
 536 {
 537         struct ieee80211_sta_ht_cap *ht_conf;
 538         struct iwl_ht_info *iwl_conf = &priv->current_ht_config;
 539         struct ieee80211_sta *sta;
 540
 541         IWL_DEBUG_MAC80211(priv, "enter: \n");
 542
 543         if (!iwl_conf->is_ht)
 544                 return;
 545
 546
 547         /*
 548          * It is totally wrong to base global information on something
 549          * that is valid only when associated, alas, this driver works
 550          * that way and I don't know how to fix it.
 551          */
 552
 553         rcu_read_lock();
 554         sta = ieee80211_find_sta(priv->hw, priv->bssid);
 555         if (!sta) {
 556                 rcu_read_unlock();
 557                 return;
 558         }
 559         ht_conf = &sta->ht_cap;
 560
 561         if (ht_conf->cap & IEEE80211_HT_CAP_SGI_20)
 562                 iwl_conf->sgf |= HT_SHORT_GI_20MHZ;
 563         if (ht_conf->cap & IEEE80211_HT_CAP_SGI_40)
 564                 iwl_conf->sgf |= HT_SHORT_GI_40MHZ;
 565
 566         iwl_conf->is_green_field = !!(ht_conf->cap & IEEE80211_HT_CAP_GRN_FLD);
 567         iwl_conf->max_amsdu_size =
 568                 !!(ht_conf->cap & IEEE80211_HT_CAP_MAX_AMSDU);
 569
 570         iwl_conf->supported_chan_width =
 571                 !!(ht_conf->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40);
 572
 573         /*
 574          * XXX: The HT configuration needs to be moved into iwl_mac_config()
 575          *      to be done there correctly.
 576          */
 577
 578         iwl_conf->extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE;
 579         if (conf_is_ht40_minus(&priv->hw->conf))
 580                 iwl_conf->extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
 581         else if (conf_is_ht40_plus(&priv->hw->conf))
 582                 iwl_conf->extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
 583
 584         /* If no above or below channel supplied disable FAT channel */
 585         if (iwl_conf->extension_chan_offset != IEEE80211_HT_PARAM_CHA_SEC_ABOVE &&
 586             iwl_conf->extension_chan_offset != IEEE80211_HT_PARAM_CHA_SEC_BELOW)
 587                 iwl_conf->supported_chan_width = 0;
 588
 589         iwl_conf->sm_ps = (u8)((ht_conf->cap & IEEE80211_HT_CAP_SM_PS) >> 2);
 590
 591         memcpy(&iwl_conf->mcs, &ht_conf->mcs, 16);
 592
 593         iwl_conf->tx_chan_width = iwl_conf->supported_chan_width != 0;
 594         iwl_conf->ht_protection =
 595                 bss_conf->ht.operation_mode & IEEE80211_HT_OP_MODE_PROTECTION;
 596         iwl_conf->non_GF_STA_present =
 597                 !!(bss_conf->ht.operation_mode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
 598
 599         rcu_read_unlock();
 600
 601         IWL_DEBUG_MAC80211(priv, "leave\n");
 602 }
 603
 604 #define MAX_UCODE_BEACON_INTERVAL       4096
 605
 606 static u16 iwl_adjust_beacon_interval(u16 beacon_val)
 607 {
 608         u16 new_val = 0;
 609         u16 beacon_factor = 0;
 610
 611         beacon_factor = (beacon_val + MAX_UCODE_BEACON_INTERVAL)
 612                                         / MAX_UCODE_BEACON_INTERVAL;
 613         new_val = beacon_val / beacon_factor;
 614
 615         if (!new_val)
 616                 new_val = MAX_UCODE_BEACON_INTERVAL;
 617
 618         return new_val;
 619 }
 620
 621 static void iwl_setup_rxon_timing(struct iwl_priv *priv)
 622 {
 623         u64 tsf;
 624         s32 interval_tm, rem;
 625         unsigned long flags;
 626         struct ieee80211_conf *conf = NULL;
 627         u16 beacon_int = 0;
 628
 629         conf = ieee80211_get_hw_conf(priv->hw);
 630
 631         spin_lock_irqsave(&priv->lock, flags);
 632         priv->rxon_timing.timestamp = cpu_to_le64(priv->timestamp);
 633         priv->rxon_timing.listen_interval = cpu_to_le16(conf->listen_interval);
 634
 635         if (priv->iw_mode == NL80211_IFTYPE_STATION) {
 636                 beacon_int = iwl_adjust_beacon_interval(priv->beacon_int);
 637                 priv->rxon_timing.atim_window = 0;
 638         } else {
 639                 beacon_int = iwl_adjust_beacon_interval(conf->beacon_int);
 640
 641                 /* TODO: we need to get atim_window from upper stack
 642                  * for now we set to 0 */
 643                 priv->rxon_timing.atim_window = 0;
 644         }
 645
 646         priv->rxon_timing.beacon_interval = cpu_to_le16(beacon_int);
 647
 648         tsf = priv->timestamp; /* tsf is modifed by do_div: copy it */
 649         interval_tm = beacon_int * 1024;
 650         rem = do_div(tsf, interval_tm);
 651         priv->rxon_timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
 652
 653         spin_unlock_irqrestore(&priv->lock, flags);
 654         IWL_DEBUG_ASSOC(priv, "beacon interval %d beacon timer %d beacon tim %d\n",
 655                         le16_to_cpu(priv->rxon_timing.beacon_interval),
 656                         le32_to_cpu(priv->rxon_timing.beacon_init_val),
 657                         le16_to_cpu(priv->rxon_timing.atim_window));
 658 }
 659
 660 static int iwl_set_mode(struct iwl_priv *priv, int mode)
 661 {
 662         iwl_connection_init_rx_config(priv, mode);
 663         iwl_set_rxon_chain(priv);
 664         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
 665
 666         iwl_clear_stations_table(priv);
 667
 668         /* dont commit rxon if rf-kill is on*/
 669         if (!iwl_is_ready_rf(priv))
 670                 return -EAGAIN;
 671
 672         cancel_delayed_work(&priv->scan_check);
 673         if (iwl_scan_cancel_timeout(priv, 100)) {
 674                 IWL_WARN(priv, "Aborted scan still in progress after 100ms\n");
 675                 IWL_DEBUG_MAC80211(priv, "leaving - scan abort failed.\n");
 676                 return -EAGAIN;
 677         }
 678
 679         iwl_commit_rxon(priv);
 680
 681         return 0;
 682 }
 683
 684 /******************************************************************************
 685  *
 686  * Generic RX handler implementations
 687  *
 688  ******************************************************************************/
 689 static void iwl_rx_reply_alive(struct iwl_priv *priv,
 690                                 struct iwl_rx_mem_buffer *rxb)
 691 {
 692         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
 693         struct iwl_alive_resp *palive;
 694         struct delayed_work *pwork;
 695
 696         palive = &pkt->u.alive_frame;
 697
 698         IWL_DEBUG_INFO(priv, "Alive ucode status 0x%08X revision "
 699                        "0x%01X 0x%01X\n",
 700                        palive->is_valid, palive->ver_type,
 701                        palive->ver_subtype);
 702
 703         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
 704                 IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
 705                 memcpy(&priv->card_alive_init,
 706                        &pkt->u.alive_frame,
 707                        sizeof(struct iwl_init_alive_resp));
 708                 pwork = &priv->init_alive_start;
 709         } else {
 710                 IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
 711                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
 712                        sizeof(struct iwl_alive_resp));
 713                 pwork = &priv->alive_start;
 714         }
 715
 716         /* We delay the ALIVE response by 5ms to
 717          * give the HW RF Kill time to activate... */
 718         if (palive->is_valid == UCODE_VALID_OK)
 719                 queue_delayed_work(priv->workqueue, pwork,
 720                                    msecs_to_jiffies(5));
 721         else
 722                 IWL_WARN(priv, "uCode did not respond OK.\n");
 723 }
 724
 725 static void iwl_bg_beacon_update(struct work_struct *work)
 726 {
 727         struct iwl_priv *priv =
 728                 container_of(work, struct iwl_priv, beacon_update);
 729         struct sk_buff *beacon;
 730
 731         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
 732         beacon = ieee80211_beacon_get(priv->hw, priv->vif);
 733
 734         if (!beacon) {
 735                 IWL_ERR(priv, "update beacon failed\n");
 736                 return;
 737         }
 738
 739         mutex_lock(&priv->mutex);
 740         /* new beacon skb is allocated every time; dispose previous.*/
 741         if (priv->ibss_beacon)
 742                 dev_kfree_skb(priv->ibss_beacon);
 743
 744         priv->ibss_beacon = beacon;
 745         mutex_unlock(&priv->mutex);
 746
 747         iwl_send_beacon_cmd(priv);
 748 }
 749
 750 /**
 751  * iwl_bg_statistics_periodic - Timer callback to queue statistics
 752  *
 753  * This callback is provided in order to send a statistics request.
 754  *
 755  * This timer function is continually reset to execute within
 756  * REG_RECALIB_PERIOD seconds since the last STATISTICS_NOTIFICATION
 757  * was received.  We need to ensure we receive the statistics in order
 758  * to update the temperature used for calibrating the TXPOWER.
 759  */
 760 static void iwl_bg_statistics_periodic(unsigned long data)
 761 {
 762         struct iwl_priv *priv = (struct iwl_priv *)data;
 763
 764         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 765                 return;
 766
 767         /* dont send host command if rf-kill is on */
 768         if (!iwl_is_ready_rf(priv))
 769                 return;
 770
 771         iwl_send_statistics_request(priv, CMD_ASYNC);
 772 }
 773
 774 static void iwl_rx_beacon_notif(struct iwl_priv *priv,
 775                                 struct iwl_rx_mem_buffer *rxb)
 776 {
 777 #ifdef CONFIG_IWLWIFI_DEBUG
 778         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
 779         struct iwl4965_beacon_notif *beacon =
 780                 (struct iwl4965_beacon_notif *)pkt->u.raw;
 781         u8 rate = iwl_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
 782
 783         IWL_DEBUG_RX(priv, "beacon status %x retries %d iss %d "
 784                 "tsf %d %d rate %d\n",
 785                 le32_to_cpu(beacon->beacon_notify_hdr.u.status) & TX_STATUS_MSK,
 786                 beacon->beacon_notify_hdr.failure_frame,
 787                 le32_to_cpu(beacon->ibss_mgr_status),
 788                 le32_to_cpu(beacon->high_tsf),
 789                 le32_to_cpu(beacon->low_tsf), rate);
 790 #endif
 791
 792         if ((priv->iw_mode == NL80211_IFTYPE_AP) &&
 793             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
 794                 queue_work(priv->workqueue, &priv->beacon_update);
 795 }
 796
 797 /* Handle notification from uCode that card's power state is changing
 798  * due to software, hardware, or critical temperature RFKILL */
 799 static void iwl_rx_card_state_notif(struct iwl_priv *priv,
 800                                     struct iwl_rx_mem_buffer *rxb)
 801 {
 802         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
 803         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
 804         unsigned long status = priv->status;
 805
 806         IWL_DEBUG_RF_KILL(priv, "Card state received: HW:%s SW:%s\n",
 807                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
 808                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
 809
 810         if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED |
 811                      RF_CARD_DISABLED)) {
 812
 813                 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
 814                             CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
 815
 816                 if (!iwl_grab_nic_access(priv)) {
 817                         iwl_write_direct32(
 818                                 priv, HBUS_TARG_MBX_C,
 819                                 HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
 820
 821                         iwl_release_nic_access(priv);
 822                 }
 823
 824                 if (!(flags & RXON_CARD_DISABLED)) {
 825                         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
 826                                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
 827                         if (!iwl_grab_nic_access(priv)) {
 828                                 iwl_write_direct32(
 829                                         priv, HBUS_TARG_MBX_C,
 830                                         HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
 831
 832                                 iwl_release_nic_access(priv);
 833                         }
 834                 }
 835
 836                 if (flags & RF_CARD_DISABLED) {
 837                         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
 838                                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
 839                         iwl_read32(priv, CSR_UCODE_DRV_GP1);
 840                         if (!iwl_grab_nic_access(priv))
 841                                 iwl_release_nic_access(priv);
 842                 }
 843         }
 844
 845         if (flags & HW_CARD_DISABLED)
 846                 set_bit(STATUS_RF_KILL_HW, &priv->status);
 847         else
 848                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
 849
 850
 851         if (flags & SW_CARD_DISABLED)
 852                 set_bit(STATUS_RF_KILL_SW, &priv->status);
 853         else
 854                 clear_bit(STATUS_RF_KILL_SW, &priv->status);
 855
 856         if (!(flags & RXON_CARD_DISABLED))
 857                 iwl_scan_cancel(priv);
 858
 859         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
 860              test_bit(STATUS_RF_KILL_HW, &priv->status)) ||
 861             (test_bit(STATUS_RF_KILL_SW, &status) !=
 862              test_bit(STATUS_RF_KILL_SW, &priv->status)))
 863                 queue_work(priv->workqueue, &priv->rf_kill);
 864         else
 865                 wake_up_interruptible(&priv->wait_command_queue);
 866 }
 867
 868 int iwl_set_pwr_src(struct iwl_priv *priv, enum iwl_pwr_src src)
 869 {
 870         int ret;
 871         unsigned long flags;
 872
 873         spin_lock_irqsave(&priv->lock, flags);
 874         ret = iwl_grab_nic_access(priv);
 875         if (ret)
 876                 goto err;
 877
 878         if (src == IWL_PWR_SRC_VAUX) {
 879                 if (pci_pme_capable(priv->pci_dev, PCI_D3cold))
 880                         iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
 881                                                APMG_PS_CTRL_VAL_PWR_SRC_VAUX,
 882                                                ~APMG_PS_CTRL_MSK_PWR_SRC);
 883         } else {
 884                 iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
 885                                        APMG_PS_CTRL_VAL_PWR_SRC_VMAIN,
 886                                        ~APMG_PS_CTRL_MSK_PWR_SRC);
 887         }
 888
 889         iwl_release_nic_access(priv);
 890 err:
 891         spin_unlock_irqrestore(&priv->lock, flags);
 892         return ret;
 893 }
 894
 895 /**
 896  * iwl_setup_rx_handlers - Initialize Rx handler callbacks
 897  *
 898  * Setup the RX handlers for each of the reply types sent from the uCode
 899  * to the host.
 900  *
 901  * This function chains into the hardware specific files for them to setup
 902  * any hardware specific handlers as well.
 903  */
 904 static void iwl_setup_rx_handlers(struct iwl_priv *priv)
 905 {
 906         priv->rx_handlers[REPLY_ALIVE] = iwl_rx_reply_alive;
 907         priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error;
 908         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
 909         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif;
 910         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
 911             iwl_rx_pm_debug_statistics_notif;
 912         priv->rx_handlers[BEACON_NOTIFICATION] = iwl_rx_beacon_notif;
 913
 914         /*
 915          * The same handler is used for both the REPLY to a discrete
 916          * statistics request from the host as well as for the periodic
 917          * statistics notifications (after received beacons) from the uCode.
 918          */
 919         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl_rx_statistics;
 920         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl_rx_statistics;
 921
 922         iwl_setup_spectrum_handlers(priv);
 923         iwl_setup_rx_scan_handlers(priv);
 924
 925         /* status change handler */
 926         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl_rx_card_state_notif;
 927
 928         priv->rx_handlers[MISSED_BEACONS_NOTIFICATION] =
 929             iwl_rx_missed_beacon_notif;
 930         /* Rx handlers */
 931         priv->rx_handlers[REPLY_RX_PHY_CMD] = iwl_rx_reply_rx_phy;
 932         priv->rx_handlers[REPLY_RX_MPDU_CMD] = iwl_rx_reply_rx;
 933         /* block ack */
 934         priv->rx_handlers[REPLY_COMPRESSED_BA] = iwl_rx_reply_compressed_ba;
 935         /* Set up hardware specific Rx handlers */
 936         priv->cfg->ops->lib->rx_handler_setup(priv);
 937 }
 938
 939 /**
 940  * iwl_rx_handle - Main entry function for receiving responses from uCode
 941  *
 942  * Uses the priv->rx_handlers callback function array to invoke
 943  * the appropriate handlers, including command responses,
 944  * frame-received notifications, and other notifications.
 945  */
 946 void iwl_rx_handle(struct iwl_priv *priv)
 947 {
 948         struct iwl_rx_mem_buffer *rxb;
 949         struct iwl_rx_packet *pkt;
 950         struct iwl_rx_queue *rxq = &priv->rxq;
 951         u32 r, i;
 952         int reclaim;
 953         unsigned long flags;
 954         u8 fill_rx = 0;
 955         u32 count = 8;
 956
 957         /* uCode's read index (stored in shared DRAM) indicates the last Rx
 958          * buffer that the driver may process (last buffer filled by ucode). */
 959         r = le16_to_cpu(rxq->rb_stts->closed_rb_num) &  0x0FFF;
 960         i = rxq->read;
 961
 962         /* Rx interrupt, but nothing sent from uCode */
 963         if (i == r)
 964                 IWL_DEBUG_RX(priv, "r = %d, i = %d\n", r, i);
 965
 966         if (iwl_rx_queue_space(rxq) > (RX_QUEUE_SIZE / 2))
 967                 fill_rx = 1;
 968
 969         while (i != r) {
 970                 rxb = rxq->queue[i];
 971
 972                 /* If an RXB doesn't have a Rx queue slot associated with it,
 973                  * then a bug has been introduced in the queue refilling
 974                  * routines -- catch it here */
 975                 BUG_ON(rxb == NULL);
 976
 977                 rxq->queue[i] = NULL;
 978
 979                 dma_sync_single_range_for_cpu(
 980                                 &priv->pci_dev->dev, rxb->real_dma_addr,
 981                                 rxb->aligned_dma_addr - rxb->real_dma_addr,
 982                                 priv->hw_params.rx_buf_size,
 983                                 PCI_DMA_FROMDEVICE);
 984                 pkt = (struct iwl_rx_packet *)rxb->skb->data;
 985
 986                 /* Reclaim a command buffer only if this packet is a response
 987                  *   to a (driver-originated) command.
 988                  * If the packet (e.g. Rx frame) originated from uCode,
 989                  *   there is no command buffer to reclaim.
 990                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
 991                  *   but apparently a few don't get set; catch them here. */
 992                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
 993                         (pkt->hdr.cmd != REPLY_RX_PHY_CMD) &&
 994                         (pkt->hdr.cmd != REPLY_RX) &&
 995                         (pkt->hdr.cmd != REPLY_RX_MPDU_CMD) &&
 996                         (pkt->hdr.cmd != REPLY_COMPRESSED_BA) &&
 997                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
 998                         (pkt->hdr.cmd != REPLY_TX);
 999
1000                 /* Based on type of command response or notification,
1001                  *   handle those that need handling via function in
1002                  *   rx_handlers table.  See iwl_setup_rx_handlers() */
1003                 if (priv->rx_handlers[pkt->hdr.cmd]) {
1004                         IWL_DEBUG_RX(priv, "r = %d, i = %d, %s, 0x%02x\n", r,
1005                                 i, get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
1006                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
1007                 } else {
1008                         /* No handling needed */
1009                         IWL_DEBUG_RX(priv,
1010                                 "r %d i %d No handler needed for %s, 0x%02x\n",
1011                                 r, i, get_cmd_string(pkt->hdr.cmd),
1012                                 pkt->hdr.cmd);
1013                 }
1014
1015                 if (reclaim) {
1016                         /* Invoke any callbacks, transfer the skb to caller, and
1017                          * fire off the (possibly) blocking iwl_send_cmd()
1018                          * as we reclaim the driver command queue */
1019                         if (rxb && rxb->skb)
1020                                 iwl_tx_cmd_complete(priv, rxb);
1021                         else
1022                                 IWL_WARN(priv, "Claim null rxb?\n");
1023                 }
1024
1025                 /* For now we just don't re-use anything.  We can tweak this
1026                  * later to try and re-use notification packets and SKBs that
1027                  * fail to Rx correctly */
1028                 if (rxb->skb != NULL) {
1029                         priv->alloc_rxb_skb--;
1030                         dev_kfree_skb_any(rxb->skb);
1031                         rxb->skb = NULL;
1032                 }
1033
1034                 pci_unmap_single(priv->pci_dev, rxb->real_dma_addr,
1035                                  priv->hw_params.rx_buf_size + 256,
1036                                  PCI_DMA_FROMDEVICE);
1037                 spin_lock_irqsave(&rxq->lock, flags);
1038                 list_add_tail(&rxb->list, &priv->rxq.rx_used);
1039                 spin_unlock_irqrestore(&rxq->lock, flags);
1040                 i = (i + 1) & RX_QUEUE_MASK;
1041                 /* If there are a lot of unused frames,
1042                  * restock the Rx queue so ucode wont assert. */
1043                 if (fill_rx) {
1044                         count++;
1045                         if (count >= 8) {
1046                                 priv->rxq.read = i;
1047                                 iwl_rx_queue_restock(priv);
1048                                 count = 0;
1049                         }
1050                 }
1051         }
1052
1053         /* Backtrack one entry */
1054         priv->rxq.read = i;
1055         iwl_rx_queue_restock(priv);
1056 }
1057
1058 /* call this function to flush any scheduled tasklet */
1059 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
1060 {
1061         /* wait to make sure we flush pending tasklet*/
1062         synchronize_irq(priv->pci_dev->irq);
1063         tasklet_kill(&priv->irq_tasklet);
1064 }
1065
1066 static void iwl_error_recovery(struct iwl_priv *priv)
1067 {
1068         unsigned long flags;
1069
1070         memcpy(&priv->staging_rxon, &priv->recovery_rxon,
1071                sizeof(priv->staging_rxon));
1072         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1073         iwl_commit_rxon(priv);
1074
1075         iwl_rxon_add_station(priv, priv->bssid, 1);
1076
1077         spin_lock_irqsave(&priv->lock, flags);
1078         priv->assoc_id = le16_to_cpu(priv->staging_rxon.assoc_id);
1079         priv->error_recovering = 0;
1080         spin_unlock_irqrestore(&priv->lock, flags);
1081 }
1082
1083 static void iwl_irq_tasklet(struct iwl_priv *priv)
1084 {
1085         u32 inta, handled = 0;
1086         u32 inta_fh;
1087         unsigned long flags;
1088 #ifdef CONFIG_IWLWIFI_DEBUG
1089         u32 inta_mask;
1090 #endif
1091
1092         spin_lock_irqsave(&priv->lock, flags);
1093
1094         /* Ack/clear/reset pending uCode interrupts.
1095          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
1096          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
1097         inta = iwl_read32(priv, CSR_INT);
1098         iwl_write32(priv, CSR_INT, inta);
1099
1100         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
1101          * Any new interrupts that happen after this, either while we're
1102          * in this tasklet, or later, will show up in next ISR/tasklet. */
1103         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1104         iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
1105
1106 #ifdef CONFIG_IWLWIFI_DEBUG
1107         if (priv->debug_level & IWL_DL_ISR) {
1108                 /* just for debug */
1109                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1110                 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1111                               inta, inta_mask, inta_fh);
1112         }
1113 #endif
1114
1115         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
1116          * atomic, make sure that inta covers all the interrupts that
1117          * we've discovered, even if FH interrupt came in just after
1118          * reading CSR_INT. */
1119         if (inta_fh & CSR49_FH_INT_RX_MASK)
1120                 inta |= CSR_INT_BIT_FH_RX;
1121         if (inta_fh & CSR49_FH_INT_TX_MASK)
1122                 inta |= CSR_INT_BIT_FH_TX;
1123
1124         /* Now service all interrupt bits discovered above. */
1125         if (inta & CSR_INT_BIT_HW_ERR) {
1126                 IWL_ERR(priv, "Microcode HW error detected.  Restarting.\n");
1127
1128                 /* Tell the device to stop sending interrupts */
1129                 iwl_disable_interrupts(priv);
1130
1131                 iwl_irq_handle_error(priv);
1132
1133                 handled |= CSR_INT_BIT_HW_ERR;
1134
1135                 spin_unlock_irqrestore(&priv->lock, flags);
1136
1137                 return;
1138         }
1139
1140 #ifdef CONFIG_IWLWIFI_DEBUG
1141         if (priv->debug_level & (IWL_DL_ISR)) {
1142                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1143                 if (inta & CSR_INT_BIT_SCD)
1144                         IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
1145                                       "the frame/frames.\n");
1146
1147                 /* Alive notification via Rx interrupt will do the real work */
1148                 if (inta & CSR_INT_BIT_ALIVE)
1149                         IWL_DEBUG_ISR(priv, "Alive interrupt\n");
1150         }
1151 #endif
1152         /* Safely ignore these bits for debug checks below */
1153         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1154
1155         /* HW RF KILL switch toggled */
1156         if (inta & CSR_INT_BIT_RF_KILL) {
1157                 int hw_rf_kill = 0;
1158                 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
1159                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
1160                         hw_rf_kill = 1;
1161
1162                 IWL_DEBUG_RF_KILL(priv, "RF_KILL bit toggled to %s.\n",
1163                                 hw_rf_kill ? "disable radio" : "enable radio");
1164
1165                 /* driver only loads ucode once setting the interface up.
1166                  * the driver allows loading the ucode even if the radio
1167                  * is killed. Hence update the killswitch state here. The
1168                  * rfkill handler will care about restarting if needed.
1169                  */
1170                 if (!test_bit(STATUS_ALIVE, &priv->status)) {
1171                         if (hw_rf_kill)
1172                                 set_bit(STATUS_RF_KILL_HW, &priv->status);
1173                         else
1174                                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
1175                         queue_work(priv->workqueue, &priv->rf_kill);
1176                 }
1177
1178                 handled |= CSR_INT_BIT_RF_KILL;
1179         }
1180
1181         /* Chip got too hot and stopped itself */
1182         if (inta & CSR_INT_BIT_CT_KILL) {
1183                 IWL_ERR(priv, "Microcode CT kill error detected.\n");
1184                 handled |= CSR_INT_BIT_CT_KILL;
1185         }
1186
1187         /* Error detected by uCode */
1188         if (inta & CSR_INT_BIT_SW_ERR) {
1189                 IWL_ERR(priv, "Microcode SW error detected. "
1190                         " Restarting 0x%X.\n", inta);
1191                 iwl_irq_handle_error(priv);
1192                 handled |= CSR_INT_BIT_SW_ERR;
1193         }
1194
1195         /* uCode wakes up after power-down sleep */
1196         if (inta & CSR_INT_BIT_WAKEUP) {
1197                 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
1198                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
1199                 iwl_txq_update_write_ptr(priv, &priv->txq[0]);
1200                 iwl_txq_update_write_ptr(priv, &priv->txq[1]);
1201                 iwl_txq_update_write_ptr(priv, &priv->txq[2]);
1202                 iwl_txq_update_write_ptr(priv, &priv->txq[3]);
1203                 iwl_txq_update_write_ptr(priv, &priv->txq[4]);
1204                 iwl_txq_update_write_ptr(priv, &priv->txq[5]);
1205
1206                 handled |= CSR_INT_BIT_WAKEUP;
1207         }
1208
1209         /* All uCode command responses, including Tx command responses,
1210          * Rx "responses" (frame-received notification), and other
1211          * notifications from uCode come through here*/
1212         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1213                 iwl_rx_handle(priv);
1214                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1215         }
1216
1217         if (inta & CSR_INT_BIT_FH_TX) {
1218                 IWL_DEBUG_ISR(priv, "Tx interrupt\n");
1219                 handled |= CSR_INT_BIT_FH_TX;
1220                 /* FH finished to write, send event */
1221                 priv->ucode_write_complete = 1;
1222                 wake_up_interruptible(&priv->wait_command_queue);
1223         }
1224
1225         if (inta & ~handled)
1226                 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
1227
1228         if (inta & ~CSR_INI_SET_MASK) {
1229                 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
1230                          inta & ~CSR_INI_SET_MASK);
1231                 IWL_WARN(priv, "   with FH_INT = 0x%08x\n", inta_fh);
1232         }
1233
1234         /* Re-enable all interrupts */
1235         /* only Re-enable if diabled by irq */
1236         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1237                 iwl_enable_interrupts(priv);
1238
1239 #ifdef CONFIG_IWLWIFI_DEBUG
1240         if (priv->debug_level & (IWL_DL_ISR)) {
1241                 inta = iwl_read32(priv, CSR_INT);
1242                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1243                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1244                 IWL_DEBUG_ISR(priv, "End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
1245                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
1246         }
1247 #endif
1248         spin_unlock_irqrestore(&priv->lock, flags);
1249 }
1250
1251 /******************************************************************************
1252  *
1253  * uCode download functions
1254  *
1255  ******************************************************************************/
1256
1257 static void iwl_dealloc_ucode_pci(struct iwl_priv *priv)
1258 {
1259         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
1260         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
1261         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1262         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
1263         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1264         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
1265 }
1266
1267 static void iwl_nic_start(struct iwl_priv *priv)
1268 {
1269         /* Remove all resets to allow NIC to operate */
1270         iwl_write32(priv, CSR_RESET, 0);
1271 }
1272
1273
1274 /**
1275  * iwl_read_ucode - Read uCode images from disk file.
1276  *
1277  * Copy into buffers for card to fetch via bus-mastering
1278  */
1279 static int iwl_read_ucode(struct iwl_priv *priv)
1280 {
1281         struct iwl_ucode *ucode;
1282         int ret = -EINVAL, index;
1283         const struct firmware *ucode_raw;
1284         const char *name_pre = priv->cfg->fw_name_pre;
1285         const unsigned int api_max = priv->cfg->ucode_api_max;
1286         const unsigned int api_min = priv->cfg->ucode_api_min;
1287         char buf[25];
1288         u8 *src;
1289         size_t len;
1290         u32 api_ver, inst_size, data_size, init_size, init_data_size, boot_size;
1291
1292         /* Ask kernel firmware_class module to get the boot firmware off disk.
1293          * request_firmware() is synchronous, file is in memory on return. */
1294         for (index = api_max; index >= api_min; index--) {
1295                 sprintf(buf, "%s%d%s", name_pre, index, ".ucode");
1296                 ret = request_firmware(&ucode_raw, buf, &priv->pci_dev->dev);
1297                 if (ret < 0) {
1298                         IWL_ERR(priv, "%s firmware file req failed: %d\n",
1299                                   buf, ret);
1300                         if (ret == -ENOENT)
1301                                 continue;
1302                         else
1303                                 goto error;
1304                 } else {
1305                         if (index < api_max)
1306                                 IWL_ERR(priv, "Loaded firmware %s, "
1307                                         "which is deprecated. "
1308                                         "Please use API v%u instead.\n",
1309                                           buf, api_max);
1310
1311                         IWL_DEBUG_INFO(priv, "Got firmware '%s' file (%zd bytes) from disk\n",
1312                                        buf, ucode_raw->size);
1313                         break;
1314                 }
1315         }
1316
1317         if (ret < 0)
1318                 goto error;
1319
1320         /* Make sure that we got at least our header! */
1321         if (ucode_raw->size < sizeof(*ucode)) {
1322                 IWL_ERR(priv, "File size way too small!\n");
1323                 ret = -EINVAL;
1324                 goto err_release;
1325         }
1326
1327         /* Data from ucode file:  header followed by uCode images */
1328         ucode = (void *)ucode_raw->data;
1329
1330         priv->ucode_ver = le32_to_cpu(ucode->ver);
1331         api_ver = IWL_UCODE_API(priv->ucode_ver);
1332         inst_size = le32_to_cpu(ucode->inst_size);
1333         data_size = le32_to_cpu(ucode->data_size);
1334         init_size = le32_to_cpu(ucode->init_size);
1335         init_data_size = le32_to_cpu(ucode->init_data_size);
1336         boot_size = le32_to_cpu(ucode->boot_size);
1337
1338         /* api_ver should match the api version forming part of the
1339          * firmware filename ... but we don't check for that and only rely
1340          * on the API version read from firware header from here on forward */
1341
1342         if (api_ver < api_min || api_ver > api_max) {
1343                 IWL_ERR(priv, "Driver unable to support your firmware API. "
1344                           "Driver supports v%u, firmware is v%u.\n",
1345                           api_max, api_ver);
1346                 priv->ucode_ver = 0;
1347                 ret = -EINVAL;
1348                 goto err_release;
1349         }
1350         if (api_ver != api_max)
1351                 IWL_ERR(priv, "Firmware has old API version. Expected v%u, "
1352                           "got v%u. New firmware can be obtained "
1353                           "from http://www.intellinuxwireless.org.\n",
1354                           api_max, api_ver);
1355
1356         IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u\n",
1357                IWL_UCODE_MAJOR(priv->ucode_ver),
1358                IWL_UCODE_MINOR(priv->ucode_ver),
1359                IWL_UCODE_API(priv->ucode_ver),
1360                IWL_UCODE_SERIAL(priv->ucode_ver));
1361
1362         IWL_DEBUG_INFO(priv, "f/w package hdr ucode version raw = 0x%x\n",
1363                        priv->ucode_ver);
1364         IWL_DEBUG_INFO(priv, "f/w package hdr runtime inst size = %u\n",
1365                        inst_size);
1366         IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %u\n",
1367                        data_size);
1368         IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %u\n",
1369                        init_size);
1370         IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %u\n",
1371                        init_data_size);
1372         IWL_DEBUG_INFO(priv, "f/w package hdr boot inst size = %u\n",
1373                        boot_size);
1374
1375         /* Verify size of file vs. image size info in file's header */
1376         if (ucode_raw->size < sizeof(*ucode) +
1377                 inst_size + data_size + init_size +
1378                 init_data_size + boot_size) {
1379
1380                 IWL_DEBUG_INFO(priv, "uCode file size %d too small\n",
1381                                (int)ucode_raw->size);
1382                 ret = -EINVAL;
1383                 goto err_release;
1384         }
1385
1386         /* Verify that uCode images will fit in card's SRAM */
1387         if (inst_size > priv->hw_params.max_inst_size) {
1388                 IWL_DEBUG_INFO(priv, "uCode instr len %d too large to fit in\n",
1389                                inst_size);
1390                 ret = -EINVAL;
1391                 goto err_release;
1392         }
1393
1394         if (data_size > priv->hw_params.max_data_size) {
1395                 IWL_DEBUG_INFO(priv, "uCode data len %d too large to fit in\n",
1396                                 data_size);
1397                 ret = -EINVAL;
1398                 goto err_release;
1399         }
1400         if (init_size > priv->hw_params.max_inst_size) {
1401                 IWL_INFO(priv, "uCode init instr len %d too large to fit in\n",
1402                         init_size);
1403                 ret = -EINVAL;
1404                 goto err_release;
1405         }
1406         if (init_data_size > priv->hw_params.max_data_size) {
1407                 IWL_INFO(priv, "uCode init data len %d too large to fit in\n",
1408                       init_data_size);
1409                 ret = -EINVAL;
1410                 goto err_release;
1411         }
1412         if (boot_size > priv->hw_params.max_bsm_size) {
1413                 IWL_INFO(priv, "uCode boot instr len %d too large to fit in\n",
1414                         boot_size);
1415                 ret = -EINVAL;
1416                 goto err_release;
1417         }
1418
1419         /* Allocate ucode buffers for card's bus-master loading ... */
1420
1421         /* Runtime instructions and 2 copies of data:
1422          * 1) unmodified from disk
1423          * 2) backup cache for save/restore during power-downs */
1424         priv->ucode_code.len = inst_size;
1425         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
1426
1427         priv->ucode_data.len = data_size;
1428         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
1429
1430         priv->ucode_data_backup.len = data_size;
1431         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1432
1433         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
1434             !priv->ucode_data_backup.v_addr)
1435                 goto err_pci_alloc;
1436
1437         /* Initialization instructions and data */
1438         if (init_size && init_data_size) {
1439                 priv->ucode_init.len = init_size;
1440                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
1441
1442                 priv->ucode_init_data.len = init_data_size;
1443                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1444
1445                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
1446                         goto err_pci_alloc;
1447         }
1448
1449         /* Bootstrap (instructions only, no data) */
1450         if (boot_size) {
1451                 priv->ucode_boot.len = boot_size;
1452                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
1453
1454                 if (!priv->ucode_boot.v_addr)
1455                         goto err_pci_alloc;
1456         }
1457
1458         /* Copy images into buffers for card's bus-master reads ... */
1459
1460         /* Runtime instructions (first block of data in file) */
1461         src = &ucode->data[0];
1462         len = priv->ucode_code.len;
1463         IWL_DEBUG_INFO(priv, "Copying (but not loading) uCode instr len %Zd\n", len);
1464         memcpy(priv->ucode_code.v_addr, src, len);
1465         IWL_DEBUG_INFO(priv, "uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
1466                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
1467
1468         /* Runtime data (2nd block)
1469          * NOTE:  Copy into backup buffer will be done in iwl_up()  */
1470         src = &ucode->data[inst_size];
1471         len = priv->ucode_data.len;
1472         IWL_DEBUG_INFO(priv, "Copying (but not loading) uCode data len %Zd\n", len);
1473         memcpy(priv->ucode_data.v_addr, src, len);
1474         memcpy(priv->ucode_data_backup.v_addr, src, len);
1475
1476         /* Initialization instructions (3rd block) */
1477         if (init_size) {
1478                 src = &ucode->data[inst_size + data_size];
1479                 len = priv->ucode_init.len;
1480                 IWL_DEBUG_INFO(priv, "Copying (but not loading) init instr len %Zd\n",
1481                                 len);
1482                 memcpy(priv->ucode_init.v_addr, src, len);
1483         }
1484
1485         /* Initialization data (4th block) */
1486         if (init_data_size) {
1487                 src = &ucode->data[inst_size + data_size + init_size];
1488                 len = priv->ucode_init_data.len;
1489                 IWL_DEBUG_INFO(priv, "Copying (but not loading) init data len %Zd\n",
1490                                len);
1491                 memcpy(priv->ucode_init_data.v_addr, src, len);
1492         }
1493
1494         /* Bootstrap instructions (5th block) */
1495         src = &ucode->data[inst_size + data_size + init_size + init_data_size];
1496         len = priv->ucode_boot.len;
1497         IWL_DEBUG_INFO(priv, "Copying (but not loading) boot instr len %Zd\n", len);
1498         memcpy(priv->ucode_boot.v_addr, src, len);
1499
1500         /* We have our copies now, allow OS release its copies */
1501         release_firmware(ucode_raw);
1502         return 0;
1503
1504  err_pci_alloc:
1505         IWL_ERR(priv, "failed to allocate pci memory\n");
1506         ret = -ENOMEM;
1507         iwl_dealloc_ucode_pci(priv);
1508
1509  err_release:
1510         release_firmware(ucode_raw);
1511
1512  error:
1513         return ret;
1514 }
1515
1516 /* temporary */
1517 static int iwl_mac_beacon_update(struct ieee80211_hw *hw,
1518                                  struct sk_buff *skb);
1519
1520 /**
1521  * iwl_alive_start - called after REPLY_ALIVE notification received
1522  *                   from protocol/runtime uCode (initialization uCode's
1523  *                   Alive gets handled by iwl_init_alive_start()).
1524  */
1525 static void iwl_alive_start(struct iwl_priv *priv)
1526 {
1527         int ret = 0;
1528
1529         IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
1530
1531         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
1532                 /* We had an error bringing up the hardware, so take it
1533                  * all the way back down so we can try again */
1534                 IWL_DEBUG_INFO(priv, "Alive failed.\n");
1535                 goto restart;
1536         }
1537
1538         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
1539          * This is a paranoid check, because we would not have gotten the
1540          * "runtime" alive if code weren't properly loaded.  */
1541         if (iwl_verify_ucode(priv)) {
1542                 /* Runtime instruction load was bad;
1543                  * take it all the way back down so we can try again */
1544                 IWL_DEBUG_INFO(priv, "Bad runtime uCode load.\n");
1545                 goto restart;
1546         }
1547
1548         iwl_clear_stations_table(priv);
1549         ret = priv->cfg->ops->lib->alive_notify(priv);
1550         if (ret) {
1551                 IWL_WARN(priv,
1552                         "Could not complete ALIVE transition [ntf]: %d\n", ret);
1553                 goto restart;
1554         }
1555
1556         /* After the ALIVE response, we can send host commands to the uCode */
1557         set_bit(STATUS_ALIVE, &priv->status);
1558
1559         if (iwl_is_rfkill(priv))
1560                 return;
1561
1562         ieee80211_wake_queues(priv->hw);
1563
1564         priv->active_rate = priv->rates_mask;
1565         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
1566
1567         if (iwl_is_associated(priv)) {
1568                 struct iwl_rxon_cmd *active_rxon =
1569                                 (struct iwl_rxon_cmd *)&priv->active_rxon;
1570
1571                 memcpy(&priv->staging_rxon, &priv->active_rxon,
1572                        sizeof(priv->staging_rxon));
1573                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1574         } else {
1575                 /* Initialize our rx_config data */
1576                 iwl_connection_init_rx_config(priv, priv->iw_mode);
1577                 iwl_set_rxon_chain(priv);
1578                 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
1579         }
1580
1581         /* Configure Bluetooth device coexistence support */
1582         iwl_send_bt_config(priv);
1583
1584         iwl_reset_run_time_calib(priv);
1585
1586         /* Configure the adapter for unassociated operation */
1587         iwl_commit_rxon(priv);
1588
1589         /* At this point, the NIC is initialized and operational */
1590         iwl_rf_kill_ct_config(priv);
1591
1592         iwl_leds_register(priv);
1593
1594         IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
1595         set_bit(STATUS_READY, &priv->status);
1596         wake_up_interruptible(&priv->wait_command_queue);
1597
1598         if (priv->error_recovering)
1599                 iwl_error_recovery(priv);
1600
1601         iwl_power_update_mode(priv, 1);
1602
1603         /* reassociate for ADHOC mode */
1604         if (priv->vif && (priv->iw_mode == NL80211_IFTYPE_ADHOC)) {
1605                 struct sk_buff *beacon = ieee80211_beacon_get(priv->hw,
1606                                                                 priv->vif);
1607                 if (beacon)
1608                         iwl_mac_beacon_update(priv->hw, beacon);
1609         }
1610
1611
1612         if (test_and_clear_bit(STATUS_MODE_PENDING, &priv->status))
1613                 iwl_set_mode(priv, priv->iw_mode);
1614
1615         return;
1616
1617  restart:
1618         queue_work(priv->workqueue, &priv->restart);
1619 }
1620
1621 static void iwl_cancel_deferred_work(struct iwl_priv *priv);
1622
1623 static void __iwl_down(struct iwl_priv *priv)
1624 {
1625         unsigned long flags;
1626         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
1627
1628         IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
1629
1630         if (!exit_pending)
1631                 set_bit(STATUS_EXIT_PENDING, &priv->status);
1632
1633         iwl_leds_unregister(priv);
1634
1635         iwl_clear_stations_table(priv);
1636
1637         /* Unblock any waiting calls */
1638         wake_up_interruptible_all(&priv->wait_command_queue);
1639
1640         /* Wipe out the EXIT_PENDING status bit if we are not actually
1641          * exiting the module */
1642         if (!exit_pending)
1643                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
1644
1645         /* stop and reset the on-board processor */
1646         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
1647
1648         /* tell the device to stop sending interrupts */
1649         spin_lock_irqsave(&priv->lock, flags);
1650         iwl_disable_interrupts(priv);
1651         spin_unlock_irqrestore(&priv->lock, flags);
1652         iwl_synchronize_irq(priv);
1653
1654         if (priv->mac80211_registered)
1655                 ieee80211_stop_queues(priv->hw);
1656
1657         /* If we have not previously called iwl_init() then
1658          * clear all bits but the RF Kill and SUSPEND bits and return */
1659         if (!iwl_is_init(priv)) {
1660                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
1661                                         STATUS_RF_KILL_HW |
1662                                test_bit(STATUS_RF_KILL_SW, &priv->status) <<
1663                                         STATUS_RF_KILL_SW |
1664                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
1665                                         STATUS_GEO_CONFIGURED |
1666                                test_bit(STATUS_IN_SUSPEND, &priv->status) <<
1667                                         STATUS_IN_SUSPEND |
1668                                test_bit(STATUS_EXIT_PENDING, &priv->status) <<
1669                                         STATUS_EXIT_PENDING;
1670                 goto exit;
1671         }
1672
1673         /* ...otherwise clear out all the status bits but the RF Kill and
1674          * SUSPEND bits and continue taking the NIC down. */
1675         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
1676                                 STATUS_RF_KILL_HW |
1677                         test_bit(STATUS_RF_KILL_SW, &priv->status) <<
1678                                 STATUS_RF_KILL_SW |
1679                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
1680                                 STATUS_GEO_CONFIGURED |
1681                         test_bit(STATUS_IN_SUSPEND, &priv->status) <<
1682                                 STATUS_IN_SUSPEND |
1683                         test_bit(STATUS_FW_ERROR, &priv->status) <<
1684                                 STATUS_FW_ERROR |
1685                        test_bit(STATUS_EXIT_PENDING, &priv->status) <<
1686                                 STATUS_EXIT_PENDING;
1687
1688         spin_lock_irqsave(&priv->lock, flags);
1689         iwl_clear_bit(priv, CSR_GP_CNTRL,
1690                          CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
1691         spin_unlock_irqrestore(&priv->lock, flags);
1692
1693         iwl_txq_ctx_stop(priv);
1694         iwl_rxq_stop(priv);
1695
1696         spin_lock_irqsave(&priv->lock, flags);
1697         if (!iwl_grab_nic_access(priv)) {
1698                 iwl_write_prph(priv, APMG_CLK_DIS_REG,
1699                                          APMG_CLK_VAL_DMA_CLK_RQT);
1700                 iwl_release_nic_access(priv);
1701         }
1702         spin_unlock_irqrestore(&priv->lock, flags);
1703
1704         udelay(5);
1705
1706         /* FIXME: apm_ops.suspend(priv) */
1707         if (exit_pending || test_bit(STATUS_IN_SUSPEND, &priv->status))
1708                 priv->cfg->ops->lib->apm_ops.stop(priv);
1709         else
1710                 priv->cfg->ops->lib->apm_ops.reset(priv);
1711  exit:
1712         memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
1713
1714         if (priv->ibss_beacon)
1715                 dev_kfree_skb(priv->ibss_beacon);
1716         priv->ibss_beacon = NULL;
1717
1718         /* clear out any free frames */
1719         iwl_clear_free_frames(priv);
1720 }
1721
1722 static void iwl_down(struct iwl_priv *priv)
1723 {
1724         mutex_lock(&priv->mutex);
1725         __iwl_down(priv);
1726         mutex_unlock(&priv->mutex);
1727
1728         iwl_cancel_deferred_work(priv);
1729 }
1730
1731 #define MAX_HW_RESTARTS 5
1732
1733 static int __iwl_up(struct iwl_priv *priv)
1734 {
1735         int i;
1736         int ret;
1737
1738         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1739                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
1740                 return -EIO;
1741         }
1742
1743         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
1744                 IWL_ERR(priv, "ucode not available for device bringup\n");
1745                 return -EIO;
1746         }
1747
1748         /* If platform's RF_KILL switch is NOT set to KILL */
1749         if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
1750                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
1751         else
1752                 set_bit(STATUS_RF_KILL_HW, &priv->status);
1753
1754         if (iwl_is_rfkill(priv)) {
1755                 iwl_enable_interrupts(priv);
1756                 IWL_WARN(priv, "Radio disabled by %s RF Kill switch\n",
1757                     test_bit(STATUS_RF_KILL_HW, &priv->status) ? "HW" : "SW");
1758                 return 0;
1759         }
1760
1761         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
1762
1763         ret = iwl_hw_nic_init(priv);
1764         if (ret) {
1765                 IWL_ERR(priv, "Unable to init nic\n");
1766                 return ret;
1767         }
1768
1769         /* make sure rfkill handshake bits are cleared */
1770         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
1771         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
1772                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
1773
1774         /* clear (again), then enable host interrupts */
1775         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
1776         iwl_enable_interrupts(priv);
1777
1778         /* really make sure rfkill handshake bits are cleared */
1779         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
1780         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
1781
1782         /* Copy original ucode data image from disk into backup cache.
1783          * This will be used to initialize the on-board processor's
1784          * data SRAM for a clean start when the runtime program first loads. */
1785         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
1786                priv->ucode_data.len);
1787
1788         for (i = 0; i < MAX_HW_RESTARTS; i++) {
1789
1790                 iwl_clear_stations_table(priv);
1791
1792                 /* load bootstrap state machine,
1793                  * load bootstrap program into processor's memory,
1794                  * prepare to load the "initialize" uCode */
1795                 ret = priv->cfg->ops->lib->load_ucode(priv);
1796
1797                 if (ret) {
1798                         IWL_ERR(priv, "Unable to set up bootstrap uCode: %d\n",
1799                                 ret);
1800                         continue;
1801                 }
1802
1803                 /* Clear out the uCode error bit if it is set */
1804                 clear_bit(STATUS_FW_ERROR, &priv->status);
1805
1806                 /* start card; "initialize" will load runtime ucode */
1807                 iwl_nic_start(priv);
1808
1809                 IWL_DEBUG_INFO(priv, DRV_NAME " is coming up\n");
1810
1811                 return 0;
1812         }
1813
1814         set_bit(STATUS_EXIT_PENDING, &priv->status);
1815         __iwl_down(priv);
1816         clear_bit(STATUS_EXIT_PENDING, &priv->status);
1817
1818         /* tried to restart and config the device for as long as our
1819          * patience could withstand */
1820         IWL_ERR(priv, "Unable to initialize device after %d attempts.\n", i);
1821         return -EIO;
1822 }
1823
1824
1825 /*****************************************************************************
1826  *
1827  * Workqueue callbacks
1828  *
1829  *****************************************************************************/
1830
1831 static void iwl_bg_init_alive_start(struct work_struct *data)
1832 {
1833         struct iwl_priv *priv =
1834             container_of(data, struct iwl_priv, init_alive_start.work);
1835
1836         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1837                 return;
1838
1839         mutex_lock(&priv->mutex);
1840         priv->cfg->ops->lib->init_alive_start(priv);
1841         mutex_unlock(&priv->mutex);
1842 }
1843
1844 static void iwl_bg_alive_start(struct work_struct *data)
1845 {
1846         struct iwl_priv *priv =
1847             container_of(data, struct iwl_priv, alive_start.work);
1848
1849         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1850                 return;
1851
1852         mutex_lock(&priv->mutex);
1853         iwl_alive_start(priv);
1854         mutex_unlock(&priv->mutex);
1855 }
1856
1857 static void iwl_bg_run_time_calib_work(struct work_struct *work)
1858 {
1859         struct iwl_priv *priv = container_of(work, struct iwl_priv,
1860                         run_time_calib_work);
1861
1862         mutex_lock(&priv->mutex);
1863
1864         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
1865             test_bit(STATUS_SCANNING, &priv->status)) {
1866                 mutex_unlock(&priv->mutex);
1867                 return;
1868         }
1869
1870         if (priv->start_calib) {
1871                 iwl_chain_noise_calibration(priv, &priv->statistics);
1872
1873                 iwl_sensitivity_calibration(priv, &priv->statistics);
1874         }
1875
1876         mutex_unlock(&priv->mutex);
1877         return;
1878 }
1879
1880 static void iwl_bg_up(struct work_struct *data)
1881 {
1882         struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
1883
1884         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1885                 return;
1886
1887         mutex_lock(&priv->mutex);
1888         __iwl_up(priv);
1889         mutex_unlock(&priv->mutex);
1890         iwl_rfkill_set_hw_state(priv);
1891 }
1892
1893 static void iwl_bg_restart(struct work_struct *data)
1894 {
1895         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
1896
1897         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1898                 return;
1899
1900         iwl_down(priv);
1901         queue_work(priv->workqueue, &priv->up);
1902 }
1903
1904 static void iwl_bg_rx_replenish(struct work_struct *data)
1905 {
1906         struct iwl_priv *priv =
1907             container_of(data, struct iwl_priv, rx_replenish);
1908
1909         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1910                 return;
1911
1912         mutex_lock(&priv->mutex);
1913         iwl_rx_replenish(priv);
1914         mutex_unlock(&priv->mutex);
1915 }
1916
1917 #define IWL_DELAY_NEXT_SCAN (HZ*2)
1918
1919 static void iwl_post_associate(struct iwl_priv *priv)
1920 {
1921         struct ieee80211_conf *conf = NULL;
1922         int ret = 0;
1923         unsigned long flags;
1924
1925         if (priv->iw_mode == NL80211_IFTYPE_AP) {
1926                 IWL_ERR(priv, "%s Should not be called in AP mode\n", __func__);
1927                 return;
1928         }
1929
1930         IWL_DEBUG_ASSOC(priv, "Associated as %d to: %pM\n",
1931                         priv->assoc_id, priv->active_rxon.bssid_addr);
1932
1933
1934         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1935                 return;
1936
1937
1938         if (!priv->vif || !priv->is_open)
1939                 return;
1940
1941         iwl_power_cancel_timeout(priv);
1942         iwl_scan_cancel_timeout(priv, 200);
1943
1944         conf = ieee80211_get_hw_conf(priv->hw);
1945
1946         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1947         iwl_commit_rxon(priv);
1948
1949         iwl_setup_rxon_timing(priv);
1950         ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
1951                               sizeof(priv->rxon_timing), &priv->rxon_timing);
1952         if (ret)
1953                 IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
1954                             "Attempting to continue.\n");
1955
1956         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
1957
1958         iwl_set_rxon_ht(priv, &priv->current_ht_config);
1959
1960         iwl_set_rxon_chain(priv);
1961         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
1962
1963         IWL_DEBUG_ASSOC(priv, "assoc id %d beacon interval %d\n",
1964                         priv->assoc_id, priv->beacon_int);
1965
1966         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
1967                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
1968         else
1969                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
1970
1971         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
1972                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
1973                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
1974                 else
1975                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
1976
1977                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
1978                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
1979
1980         }
1981
1982         iwl_commit_rxon(priv);
1983
1984         switch (priv->iw_mode) {
1985         case NL80211_IFTYPE_STATION:
1986                 break;
1987
1988         case NL80211_IFTYPE_ADHOC:
1989
1990                 /* assume default assoc id */
1991                 priv->assoc_id = 1;
1992
1993                 iwl_rxon_add_station(priv, priv->bssid, 0);
1994                 iwl_send_beacon_cmd(priv);
1995
1996                 break;
1997
1998         default:
1999                 IWL_ERR(priv, "%s Should not be called in %d mode\n",
2000                           __func__, priv->iw_mode);
2001                 break;
2002         }
2003
2004         if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
2005                 priv->assoc_station_added = 1;
2006
2007         spin_lock_irqsave(&priv->lock, flags);
2008         iwl_activate_qos(priv, 0);
2009         spin_unlock_irqrestore(&priv->lock, flags);
2010
2011         /* the chain noise calibration will enabled PM upon completion
2012          * If chain noise has already been run, then we need to enable
2013          * power management here */
2014         if (priv->chain_noise_data.state == IWL_CHAIN_NOISE_DONE)
2015                 iwl_power_enable_management(priv);
2016
2017         /* Enable Rx differential gain and sensitivity calibrations */
2018         iwl_chain_noise_reset(priv);
2019         priv->start_calib = 1;
2020
2021 }
2022
2023 /*****************************************************************************
2024  *
2025  * mac80211 entry point functions
2026  *
2027  *****************************************************************************/
2028
2029 #define UCODE_READY_TIMEOUT     (4 * HZ)
2030
2031 static int iwl_mac_start(struct ieee80211_hw *hw)
2032 {
2033         struct iwl_priv *priv = hw->priv;
2034         int ret;
2035
2036         IWL_DEBUG_MAC80211(priv, "enter\n");
2037
2038         /* we should be verifying the device is ready to be opened */
2039         mutex_lock(&priv->mutex);
2040
2041         memset(&priv->staging_rxon, 0, sizeof(struct iwl_rxon_cmd));
2042         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
2043          * ucode filename and max sizes are card-specific. */
2044
2045         if (!priv->ucode_code.len) {
2046                 ret = iwl_read_ucode(priv);
2047                 if (ret) {
2048                         IWL_ERR(priv, "Could not read microcode: %d\n", ret);
2049                         mutex_unlock(&priv->mutex);
2050                         return ret;
2051                 }
2052         }
2053
2054         ret = __iwl_up(priv);
2055
2056         mutex_unlock(&priv->mutex);
2057
2058         iwl_rfkill_set_hw_state(priv);
2059
2060         if (ret)
2061                 return ret;
2062
2063         if (iwl_is_rfkill(priv))
2064                 goto out;
2065
2066         IWL_DEBUG_INFO(priv, "Start UP work done.\n");
2067
2068         if (test_bit(STATUS_IN_SUSPEND, &priv->status))
2069                 return 0;
2070
2071         /* Wait for START_ALIVE from Run Time ucode. Otherwise callbacks from
2072          * mac80211 will not be run successfully. */
2073         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
2074                         test_bit(STATUS_READY, &priv->status),
2075                         UCODE_READY_TIMEOUT);
2076         if (!ret) {
2077                 if (!test_bit(STATUS_READY, &priv->status)) {
2078                         IWL_ERR(priv, "START_ALIVE timeout after %dms.\n",
2079                                 jiffies_to_msecs(UCODE_READY_TIMEOUT));
2080                         return -ETIMEDOUT;
2081                 }
2082         }
2083
2084 out:
2085         priv->is_open = 1;
2086         IWL_DEBUG_MAC80211(priv, "leave\n");
2087         return 0;
2088 }
2089
2090 static void iwl_mac_stop(struct ieee80211_hw *hw)
2091 {
2092         struct iwl_priv *priv = hw->priv;
2093
2094         IWL_DEBUG_MAC80211(priv, "enter\n");
2095
2096         if (!priv->is_open) {
2097                 IWL_DEBUG_MAC80211(priv, "leave - skip\n");
2098                 return;
2099         }
2100
2101         priv->is_open = 0;
2102
2103         if (iwl_is_ready_rf(priv)) {
2104                 /* stop mac, cancel any scan request and clear
2105                  * RXON_FILTER_ASSOC_MSK BIT
2106                  */
2107                 mutex_lock(&priv->mutex);
2108                 iwl_scan_cancel_timeout(priv, 100);
2109                 mutex_unlock(&priv->mutex);
2110         }
2111
2112         iwl_down(priv);
2113
2114         flush_workqueue(priv->workqueue);
2115
2116         /* enable interrupts again in order to receive rfkill changes */
2117         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2118         iwl_enable_interrupts(priv);
2119
2120         IWL_DEBUG_MAC80211(priv, "leave\n");
2121 }
2122
2123 static int iwl_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
2124 {
2125         struct iwl_priv *priv = hw->priv;
2126
2127         IWL_DEBUG_MACDUMP(priv, "enter\n");
2128
2129         IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
2130                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
2131
2132         if (iwl_tx_skb(priv, skb))
2133                 dev_kfree_skb_any(skb);
2134
2135         IWL_DEBUG_MACDUMP(priv, "leave\n");
2136         return NETDEV_TX_OK;
2137 }
2138
2139 static int iwl_mac_add_interface(struct ieee80211_hw *hw,
2140                                  struct ieee80211_if_init_conf *conf)
2141 {
2142         struct iwl_priv *priv = hw->priv;
2143         unsigned long flags;
2144
2145         IWL_DEBUG_MAC80211(priv, "enter: type %d\n", conf->type);
2146
2147         if (priv->vif) {
2148                 IWL_DEBUG_MAC80211(priv, "leave - vif != NULL\n");
2149                 return -EOPNOTSUPP;
2150         }
2151
2152         spin_lock_irqsave(&priv->lock, flags);
2153         priv->vif = conf->vif;
2154         priv->iw_mode = conf->type;
2155
2156         spin_unlock_irqrestore(&priv->lock, flags);
2157
2158         mutex_lock(&priv->mutex);
2159
2160         if (conf->mac_addr) {
2161                 IWL_DEBUG_MAC80211(priv, "Set %pM\n", conf->mac_addr);
2162                 memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
2163         }
2164
2165         if (iwl_set_mode(priv, conf->type) == -EAGAIN)
2166                 /* we are not ready, will run again when ready */
2167                 set_bit(STATUS_MODE_PENDING, &priv->status);
2168
2169         mutex_unlock(&priv->mutex);
2170
2171         IWL_DEBUG_MAC80211(priv, "leave\n");
2172         return 0;
2173 }
2174
2175 /**
2176  * iwl_mac_config - mac80211 config callback
2177  *
2178  * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
2179  * be set inappropriately and the driver currently sets the hardware up to
2180  * use it whenever needed.
2181  */
2182 static int iwl_mac_config(struct ieee80211_hw *hw, u32 changed)
2183 {
2184         struct iwl_priv *priv = hw->priv;
2185         const struct iwl_channel_info *ch_info;
2186         struct ieee80211_conf *conf = &hw->conf;
2187         unsigned long flags;
2188         int ret = 0;
2189         u16 channel;
2190
2191         mutex_lock(&priv->mutex);
2192         IWL_DEBUG_MAC80211(priv, "enter to channel %d\n", conf->channel->hw_value);
2193
2194         priv->current_ht_config.is_ht = conf_is_ht(conf);
2195
2196         if (conf->radio_enabled && iwl_radio_kill_sw_enable_radio(priv)) {
2197                 IWL_DEBUG_MAC80211(priv, "leave - RF-KILL - waiting for uCode\n");
2198                 goto out;
2199         }
2200
2201         if (!conf->radio_enabled)
2202                 iwl_radio_kill_sw_disable_radio(priv);
2203
2204         if (!iwl_is_ready(priv)) {
2205                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2206                 ret = -EIO;
2207                 goto out;
2208         }
2209
2210         if (unlikely(!priv->cfg->mod_params->disable_hw_scan &&
2211                      test_bit(STATUS_SCANNING, &priv->status))) {
2212                 IWL_DEBUG_MAC80211(priv, "leave - scanning\n");
2213                 mutex_unlock(&priv->mutex);
2214                 return 0;
2215         }
2216
2217         channel = ieee80211_frequency_to_channel(conf->channel->center_freq);
2218         ch_info = iwl_get_channel_info(priv, conf->channel->band, channel);
2219         if (!is_channel_valid(ch_info)) {
2220                 IWL_DEBUG_MAC80211(priv, "leave - invalid channel\n");
2221                 ret = -EINVAL;
2222                 goto out;
2223         }
2224
2225         if (priv->iw_mode == NL80211_IFTYPE_ADHOC &&
2226             !is_channel_ibss(ch_info)) {
2227                 IWL_ERR(priv, "channel %d in band %d not IBSS channel\n",
2228                         conf->channel->hw_value, conf->channel->band);
2229                 ret = -EINVAL;
2230                 goto out;
2231         }
2232
2233         spin_lock_irqsave(&priv->lock, flags);
2234
2235
2236         /* if we are switching from ht to 2.4 clear flags
2237          * from any ht related info since 2.4 does not
2238          * support ht */
2239         if ((le16_to_cpu(priv->staging_rxon.channel) != channel)
2240 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
2241             && !(conf->flags & IEEE80211_CONF_CHANNEL_SWITCH)
2242 #endif
2243         )
2244                 priv->staging_rxon.flags = 0;
2245
2246         iwl_set_rxon_channel(priv, conf->channel);
2247
2248         iwl_set_flags_for_band(priv, conf->channel->band);
2249
2250         /* The list of supported rates and rate mask can be different
2251          * for each band; since the band may have changed, reset
2252          * the rate mask to what mac80211 lists */
2253         iwl_set_rate(priv);
2254
2255         spin_unlock_irqrestore(&priv->lock, flags);
2256
2257 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
2258         if (conf->flags & IEEE80211_CONF_CHANNEL_SWITCH) {
2259                 iwl_hw_channel_switch(priv, conf->channel);
2260                 goto out;
2261         }
2262 #endif
2263
2264         if (!conf->radio_enabled) {
2265                 IWL_DEBUG_MAC80211(priv, "leave - radio disabled\n");
2266                 goto out;
2267         }
2268
2269         if (iwl_is_rfkill(priv)) {
2270                 IWL_DEBUG_MAC80211(priv, "leave - RF kill\n");
2271                 ret = -EIO;
2272                 goto out;
2273         }
2274
2275         if (conf->flags & IEEE80211_CONF_PS)
2276                 ret = iwl_power_set_user_mode(priv, IWL_POWER_INDEX_3);
2277         else
2278                 ret = iwl_power_set_user_mode(priv, IWL_POWER_MODE_CAM);
2279         if (ret)
2280                 IWL_DEBUG_MAC80211(priv, "Error setting power level\n");
2281
2282         IWL_DEBUG_MAC80211(priv, "TX Power old=%d new=%d\n",
2283                            priv->tx_power_user_lmt, conf->power_level);
2284
2285         iwl_set_tx_power(priv, conf->power_level, false);
2286
2287         iwl_set_rate(priv);
2288
2289         /* call to ensure that 4965 rx_chain is set properly in monitor mode */
2290         iwl_set_rxon_chain(priv);
2291
2292         if (memcmp(&priv->active_rxon,
2293                    &priv->staging_rxon, sizeof(priv->staging_rxon)))
2294                 iwl_commit_rxon(priv);
2295         else
2296                 IWL_DEBUG_INFO(priv, "No re-sending same RXON configuration.\n");
2297
2298         IWL_DEBUG_MAC80211(priv, "leave\n");
2299
2300 out:
2301         mutex_unlock(&priv->mutex);
2302         return ret;
2303 }
2304
2305 static void iwl_config_ap(struct iwl_priv *priv)
2306 {
2307         int ret = 0;
2308         unsigned long flags;
2309
2310         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2311                 return;
2312
2313         /* The following should be done only at AP bring up */
2314         if (!iwl_is_associated(priv)) {
2315
2316                 /* RXON - unassoc (to set timing command) */
2317                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2318                 iwl_commit_rxon(priv);
2319
2320                 /* RXON Timing */
2321                 iwl_setup_rxon_timing(priv);
2322                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
2323                                 sizeof(priv->rxon_timing), &priv->rxon_timing);
2324                 if (ret)
2325                         IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
2326                                         "Attempting to continue.\n");
2327
2328                 iwl_set_rxon_chain(priv);
2329
2330                 /* FIXME: what should be the assoc_id for AP? */
2331                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
2332                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
2333                         priv->staging_rxon.flags |=
2334                                 RXON_FLG_SHORT_PREAMBLE_MSK;
2335                 else
2336                         priv->staging_rxon.flags &=
2337                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
2338
2339                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
2340                         if (priv->assoc_capability &
2341                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
2342                                 priv->staging_rxon.flags |=
2343                                         RXON_FLG_SHORT_SLOT_MSK;
2344                         else
2345                                 priv->staging_rxon.flags &=
2346                                         ~RXON_FLG_SHORT_SLOT_MSK;
2347
2348                         if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
2349                                 priv->staging_rxon.flags &=
2350                                         ~RXON_FLG_SHORT_SLOT_MSK;
2351                 }
2352                 /* restore RXON assoc */
2353                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2354                 iwl_commit_rxon(priv);
2355                 spin_lock_irqsave(&priv->lock, flags);
2356                 iwl_activate_qos(priv, 1);
2357                 spin_unlock_irqrestore(&priv->lock, flags);
2358                 iwl_rxon_add_station(priv, iwl_bcast_addr, 0);
2359         }
2360         iwl_send_beacon_cmd(priv);
2361
2362         /* FIXME - we need to add code here to detect a totally new
2363          * configuration, reset the AP, unassoc, rxon timing, assoc,
2364          * clear sta table, add BCAST sta... */
2365 }
2366
2367
2368 static int iwl_mac_config_interface(struct ieee80211_hw *hw,
2369                                         struct ieee80211_vif *vif,
2370                                     struct ieee80211_if_conf *conf)
2371 {
2372         struct iwl_priv *priv = hw->priv;
2373         int rc;
2374
2375         if (conf == NULL)
2376                 return -EIO;
2377
2378         if (priv->vif != vif) {
2379                 IWL_DEBUG_MAC80211(priv, "leave - priv->vif != vif\n");
2380                 return 0;
2381         }
2382
2383         if (priv->iw_mode == NL80211_IFTYPE_ADHOC &&
2384             conf->changed & IEEE80211_IFCC_BEACON) {
2385                 struct sk_buff *beacon = ieee80211_beacon_get(hw, vif);
2386                 if (!beacon)
2387                         return -ENOMEM;
2388                 mutex_lock(&priv->mutex);
2389                 rc = iwl_mac_beacon_update(hw, beacon);
2390                 mutex_unlock(&priv->mutex);
2391                 if (rc)
2392                         return rc;
2393         }
2394
2395         if (!iwl_is_alive(priv))
2396                 return -EAGAIN;
2397
2398         mutex_lock(&priv->mutex);
2399
2400         if (conf->bssid)
2401                 IWL_DEBUG_MAC80211(priv, "bssid: %pM\n", conf->bssid);
2402
2403 /*
2404  * very dubious code was here; the probe filtering flag is never set:
2405  *
2406         if (unlikely(test_bit(STATUS_SCANNING, &priv->status)) &&
2407             !(priv->hw->flags & IEEE80211_HW_NO_PROBE_FILTERING)) {
2408  */
2409
2410         if (priv->iw_mode == NL80211_IFTYPE_AP) {
2411                 if (!conf->bssid) {
2412                         conf->bssid = priv->mac_addr;
2413                         memcpy(priv->bssid, priv->mac_addr, ETH_ALEN);
2414                         IWL_DEBUG_MAC80211(priv, "bssid was set to: %pM\n",
2415                                            conf->bssid);
2416                 }
2417                 if (priv->ibss_beacon)
2418                         dev_kfree_skb(priv->ibss_beacon);
2419
2420                 priv->ibss_beacon = ieee80211_beacon_get(hw, vif);
2421         }
2422
2423         if (iwl_is_rfkill(priv))
2424                 goto done;
2425
2426         if (conf->bssid && !is_zero_ether_addr(conf->bssid) &&
2427             !is_multicast_ether_addr(conf->bssid)) {
2428                 /* If there is currently a HW scan going on in the background
2429                  * then we need to cancel it else the RXON below will fail. */
2430                 if (iwl_scan_cancel_timeout(priv, 100)) {
2431                         IWL_WARN(priv, "Aborted scan still in progress "
2432                                     "after 100ms\n");
2433                         IWL_DEBUG_MAC80211(priv, "leaving - scan abort failed.\n");
2434                         mutex_unlock(&priv->mutex);
2435                         return -EAGAIN;
2436                 }
2437                 memcpy(priv->staging_rxon.bssid_addr, conf->bssid, ETH_ALEN);
2438
2439                 /* TODO: Audit driver for usage of these members and see
2440                  * if mac80211 deprecates them (priv->bssid looks like it
2441                  * shouldn't be there, but I haven't scanned the IBSS code
2442                  * to verify) - jpk */
2443                 memcpy(priv->bssid, conf->bssid, ETH_ALEN);
2444
2445                 if (priv->iw_mode == NL80211_IFTYPE_AP)
2446                         iwl_config_ap(priv);
2447                 else {
2448                         rc = iwl_commit_rxon(priv);
2449                         if ((priv->iw_mode == NL80211_IFTYPE_STATION) && rc)
2450                                 iwl_rxon_add_station(
2451                                         priv, priv->active_rxon.bssid_addr, 1);
2452                 }
2453
2454         } else {
2455                 iwl_scan_cancel_timeout(priv, 100);
2456                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2457                 iwl_commit_rxon(priv);
2458         }
2459
2460  done:
2461         IWL_DEBUG_MAC80211(priv, "leave\n");
2462         mutex_unlock(&priv->mutex);
2463
2464         return 0;
2465 }
2466
2467 static void iwl_mac_remove_interface(struct ieee80211_hw *hw,
2468                                      struct ieee80211_if_init_conf *conf)
2469 {
2470         struct iwl_priv *priv = hw->priv;
2471
2472         IWL_DEBUG_MAC80211(priv, "enter\n");
2473
2474         mutex_lock(&priv->mutex);
2475
2476         if (iwl_is_ready_rf(priv)) {
2477                 iwl_scan_cancel_timeout(priv, 100);
2478                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2479                 iwl_commit_rxon(priv);
2480         }
2481         if (priv->vif == conf->vif) {
2482                 priv->vif = NULL;
2483                 memset(priv->bssid, 0, ETH_ALEN);
2484         }
2485         mutex_unlock(&priv->mutex);
2486
2487         IWL_DEBUG_MAC80211(priv, "leave\n");
2488
2489 }
2490
2491 #define IWL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6)
2492 static void iwl_bss_info_changed(struct ieee80211_hw *hw,
2493                                      struct ieee80211_vif *vif,
2494                                      struct ieee80211_bss_conf *bss_conf,
2495                                      u32 changes)
2496 {
2497         struct iwl_priv *priv = hw->priv;
2498
2499         IWL_DEBUG_MAC80211(priv, "changes = 0x%X\n", changes);
2500
2501         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
2502                 IWL_DEBUG_MAC80211(priv, "ERP_PREAMBLE %d\n",
2503                                    bss_conf->use_short_preamble);
2504                 if (bss_conf->use_short_preamble)
2505                         priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2506                 else
2507                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2508         }
2509
2510         if (changes & BSS_CHANGED_ERP_CTS_PROT) {
2511                 IWL_DEBUG_MAC80211(priv, "ERP_CTS %d\n", bss_conf->use_cts_prot);
2512                 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
2513                         priv->staging_rxon.flags |= RXON_FLG_TGG_PROTECT_MSK;
2514                 else
2515                         priv->staging_rxon.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
2516         }
2517
2518         if (changes & BSS_CHANGED_HT) {
2519                 iwl_ht_conf(priv, bss_conf);
2520                 iwl_set_rxon_chain(priv);
2521         }
2522
2523         if (changes & BSS_CHANGED_ASSOC) {
2524                 IWL_DEBUG_MAC80211(priv, "ASSOC %d\n", bss_conf->assoc);
2525                 /* This should never happen as this function should
2526                  * never be called from interrupt context. */
2527                 if (WARN_ON_ONCE(in_interrupt()))
2528                         return;
2529                 if (bss_conf->assoc) {
2530                         priv->assoc_id = bss_conf->aid;
2531                         priv->beacon_int = bss_conf->beacon_int;
2532                         priv->power_data.dtim_period = bss_conf->dtim_period;
2533                         priv->timestamp = bss_conf->timestamp;
2534                         priv->assoc_capability = bss_conf->assoc_capability;
2535
2536                         /* we have just associated, don't start scan too early
2537                          * leave time for EAPOL exchange to complete
2538                          */
2539                         priv->next_scan_jiffies = jiffies +
2540                                         IWL_DELAY_NEXT_SCAN_AFTER_ASSOC;
2541                         mutex_lock(&priv->mutex);
2542                         iwl_post_associate(priv);
2543                         mutex_unlock(&priv->mutex);
2544                 } else {
2545                         priv->assoc_id = 0;
2546                         IWL_DEBUG_MAC80211(priv, "DISASSOC %d\n", bss_conf->assoc);
2547                 }
2548         } else if (changes && iwl_is_associated(priv) && priv->assoc_id) {
2549                         IWL_DEBUG_MAC80211(priv, "Associated Changes %d\n", changes);
2550                         iwl_send_rxon_assoc(priv);
2551         }
2552
2553 }
2554
2555 static void iwl_mac_update_tkip_key(struct ieee80211_hw *hw,
2556                         struct ieee80211_key_conf *keyconf, const u8 *addr,
2557                         u32 iv32, u16 *phase1key)
2558 {
2559
2560         struct iwl_priv *priv = hw->priv;
2561         IWL_DEBUG_MAC80211(priv, "enter\n");
2562
2563         iwl_update_tkip_key(priv, keyconf, addr, iv32, phase1key);
2564
2565         IWL_DEBUG_MAC80211(priv, "leave\n");
2566 }
2567
2568 static int iwl_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
2569                            struct ieee80211_vif *vif,
2570                            struct ieee80211_sta *sta,
2571                            struct ieee80211_key_conf *key)
2572 {
2573         struct iwl_priv *priv = hw->priv;
2574         const u8 *addr;
2575         int ret;
2576         u8 sta_id;
2577         bool is_default_wep_key = false;
2578
2579         IWL_DEBUG_MAC80211(priv, "enter\n");
2580
2581         if (priv->hw_params.sw_crypto) {
2582                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
2583                 return -EOPNOTSUPP;
2584         }
2585         addr = sta ? sta->addr : iwl_bcast_addr;
2586         sta_id = iwl_find_station(priv, addr);
2587         if (sta_id == IWL_INVALID_STATION) {
2588                 IWL_DEBUG_MAC80211(priv, "leave - %pM not in station map.\n",
2589                                    addr);
2590                 return -EINVAL;
2591
2592         }
2593
2594         mutex_lock(&priv->mutex);
2595         iwl_scan_cancel_timeout(priv, 100);
2596         mutex_unlock(&priv->mutex);
2597
2598         /* If we are getting WEP group key and we didn't receive any key mapping
2599          * so far, we are in legacy wep mode (group key only), otherwise we are
2600          * in 1X mode.
2601          * In legacy wep mode, we use another host command to the uCode */
2602         if (key->alg == ALG_WEP && sta_id == priv->hw_params.bcast_sta_id &&
2603                 priv->iw_mode != NL80211_IFTYPE_AP) {
2604                 if (cmd == SET_KEY)
2605                         is_default_wep_key = !priv->key_mapping_key;
2606                 else
2607                         is_default_wep_key =
2608                                         (key->hw_key_idx == HW_KEY_DEFAULT);
2609         }
2610
2611         switch (cmd) {
2612         case SET_KEY:
2613                 if (is_default_wep_key)
2614                         ret = iwl_set_default_wep_key(priv, key);
2615                 else
2616                         ret = iwl_set_dynamic_key(priv, key, sta_id);
2617
2618                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
2619                 break;
2620         case DISABLE_KEY:
2621                 if (is_default_wep_key)
2622                         ret = iwl_remove_default_wep_key(priv, key);
2623                 else
2624                         ret = iwl_remove_dynamic_key(priv, key, sta_id);
2625
2626                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
2627                 break;
2628         default:
2629                 ret = -EINVAL;
2630         }
2631
2632         IWL_DEBUG_MAC80211(priv, "leave\n");
2633
2634         return ret;
2635 }
2636
2637 static int iwl_mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
2638                            const struct ieee80211_tx_queue_params *params)
2639 {
2640         struct iwl_priv *priv = hw->priv;
2641         unsigned long flags;
2642         int q;
2643
2644         IWL_DEBUG_MAC80211(priv, "enter\n");
2645
2646         if (!iwl_is_ready_rf(priv)) {
2647                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
2648                 return -EIO;
2649         }
2650
2651         if (queue >= AC_NUM) {
2652                 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
2653                 return 0;
2654         }
2655
2656         q = AC_NUM - 1 - queue;
2657
2658         spin_lock_irqsave(&priv->lock, flags);
2659
2660         priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
2661         priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
2662         priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
2663         priv->qos_data.def_qos_parm.ac[q].edca_txop =
2664                         cpu_to_le16((params->txop * 32));
2665
2666         priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
2667         priv->qos_data.qos_active = 1;
2668
2669         if (priv->iw_mode == NL80211_IFTYPE_AP)
2670                 iwl_activate_qos(priv, 1);
2671         else if (priv->assoc_id && iwl_is_associated(priv))
2672                 iwl_activate_qos(priv, 0);
2673
2674         spin_unlock_irqrestore(&priv->lock, flags);
2675
2676         IWL_DEBUG_MAC80211(priv, "leave\n");
2677         return 0;
2678 }
2679
2680 static int iwl_mac_ampdu_action(struct ieee80211_hw *hw,
2681                              enum ieee80211_ampdu_mlme_action action,
2682                              struct ieee80211_sta *sta, u16 tid, u16 *ssn)
2683 {
2684         struct iwl_priv *priv = hw->priv;
2685
2686         IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n",
2687                      sta->addr, tid);
2688
2689         if (!(priv->cfg->sku & IWL_SKU_N))
2690                 return -EACCES;
2691
2692         switch (action) {
2693         case IEEE80211_AMPDU_RX_START:
2694                 IWL_DEBUG_HT(priv, "start Rx\n");
2695                 return iwl_sta_rx_agg_start(priv, sta->addr, tid, *ssn);
2696         case IEEE80211_AMPDU_RX_STOP:
2697                 IWL_DEBUG_HT(priv, "stop Rx\n");
2698                 return iwl_sta_rx_agg_stop(priv, sta->addr, tid);
2699         case IEEE80211_AMPDU_TX_START:
2700                 IWL_DEBUG_HT(priv, "start Tx\n");
2701                 return iwl_tx_agg_start(priv, sta->addr, tid, ssn);
2702         case IEEE80211_AMPDU_TX_STOP:
2703                 IWL_DEBUG_HT(priv, "stop Tx\n");
2704                 return iwl_tx_agg_stop(priv, sta->addr, tid);
2705         default:
2706                 IWL_DEBUG_HT(priv, "unknown\n");
2707                 return -EINVAL;
2708                 break;
2709         }
2710         return 0;
2711 }
2712
2713 static int iwl_mac_get_tx_stats(struct ieee80211_hw *hw,
2714                                 struct ieee80211_tx_queue_stats *stats)
2715 {
2716         struct iwl_priv *priv = hw->priv;
2717         int i, avail;
2718         struct iwl_tx_queue *txq;
2719         struct iwl_queue *q;
2720         unsigned long flags;
2721
2722         IWL_DEBUG_MAC80211(priv, "enter\n");
2723
2724         if (!iwl_is_ready_rf(priv)) {
2725                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
2726                 return -EIO;
2727         }
2728
2729         spin_lock_irqsave(&priv->lock, flags);
2730
2731         for (i = 0; i < AC_NUM; i++) {
2732                 txq = &priv->txq[i];
2733                 q = &txq->q;
2734                 avail = iwl_queue_space(q);
2735
2736                 stats[i].len = q->n_window - avail;
2737                 stats[i].limit = q->n_window - q->high_mark;
2738                 stats[i].count = q->n_window;
2739
2740         }
2741         spin_unlock_irqrestore(&priv->lock, flags);
2742
2743         IWL_DEBUG_MAC80211(priv, "leave\n");
2744
2745         return 0;
2746 }
2747
2748 static int iwl_mac_get_stats(struct ieee80211_hw *hw,
2749                              struct ieee80211_low_level_stats *stats)
2750 {
2751         struct iwl_priv *priv = hw->priv;
2752
2753         priv = hw->priv;
2754         IWL_DEBUG_MAC80211(priv, "enter\n");
2755         IWL_DEBUG_MAC80211(priv, "leave\n");
2756
2757         return 0;
2758 }
2759
2760 static void iwl_mac_reset_tsf(struct ieee80211_hw *hw)
2761 {
2762         struct iwl_priv *priv = hw->priv;
2763         unsigned long flags;
2764
2765         mutex_lock(&priv->mutex);
2766         IWL_DEBUG_MAC80211(priv, "enter\n");
2767
2768         spin_lock_irqsave(&priv->lock, flags);
2769         memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_info));
2770         spin_unlock_irqrestore(&priv->lock, flags);
2771
2772         iwl_reset_qos(priv);
2773
2774         spin_lock_irqsave(&priv->lock, flags);
2775         priv->assoc_id = 0;
2776         priv->assoc_capability = 0;
2777         priv->assoc_station_added = 0;
2778
2779         /* new association get rid of ibss beacon skb */
2780         if (priv->ibss_beacon)
2781                 dev_kfree_skb(priv->ibss_beacon);
2782
2783         priv->ibss_beacon = NULL;
2784
2785         priv->beacon_int = priv->hw->conf.beacon_int;
2786         priv->timestamp = 0;
2787         if ((priv->iw_mode == NL80211_IFTYPE_STATION))
2788                 priv->beacon_int = 0;
2789
2790         spin_unlock_irqrestore(&priv->lock, flags);
2791
2792         if (!iwl_is_ready_rf(priv)) {
2793                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2794                 mutex_unlock(&priv->mutex);
2795                 return;
2796         }
2797
2798         /* we are restarting association process
2799          * clear RXON_FILTER_ASSOC_MSK bit
2800          */
2801         if (priv->iw_mode != NL80211_IFTYPE_AP) {
2802                 iwl_scan_cancel_timeout(priv, 100);
2803                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2804                 iwl_commit_rxon(priv);
2805         }
2806
2807         iwl_power_update_mode(priv, 0);
2808
2809         /* Per mac80211.h: This is only used in IBSS mode... */
2810         if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
2811
2812                 /* switch to CAM during association period.
2813                  * the ucode will block any association/authentication
2814                  * frome during assiciation period if it can not hear
2815                  * the AP because of PM. the timer enable PM back is
2816                  * association do not complete
2817                  */
2818                 if (priv->hw->conf.channel->flags & (IEEE80211_CHAN_PASSIVE_SCAN |
2819                                                      IEEE80211_CHAN_RADAR))
2820                                 iwl_power_disable_management(priv, 3000);
2821
2822                 IWL_DEBUG_MAC80211(priv, "leave - not in IBSS\n");
2823                 mutex_unlock(&priv->mutex);
2824                 return;
2825         }
2826
2827         iwl_set_rate(priv);
2828
2829         mutex_unlock(&priv->mutex);
2830
2831         IWL_DEBUG_MAC80211(priv, "leave\n");
2832 }
2833
2834 static int iwl_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb)
2835 {
2836         struct iwl_priv *priv = hw->priv;
2837         unsigned long flags;
2838         __le64 timestamp;
2839
2840         IWL_DEBUG_MAC80211(priv, "enter\n");
2841
2842         if (!iwl_is_ready_rf(priv)) {
2843                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
2844                 return -EIO;
2845         }
2846
2847         if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
2848                 IWL_DEBUG_MAC80211(priv, "leave - not IBSS\n");
2849                 return -EIO;
2850         }
2851
2852         spin_lock_irqsave(&priv->lock, flags);
2853
2854         if (priv->ibss_beacon)
2855                 dev_kfree_skb(priv->ibss_beacon);
2856
2857         priv->ibss_beacon = skb;
2858
2859         priv->assoc_id = 0;
2860         timestamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
2861         priv->timestamp = le64_to_cpu(timestamp);
2862
2863         IWL_DEBUG_MAC80211(priv, "leave\n");
2864         spin_unlock_irqrestore(&priv->lock, flags);
2865
2866         iwl_reset_qos(priv);
2867
2868         iwl_post_associate(priv);
2869
2870
2871         return 0;
2872 }
2873
2874 /*****************************************************************************
2875  *
2876  * sysfs attributes
2877  *
2878  *****************************************************************************/
2879
2880 #ifdef CONFIG_IWLWIFI_DEBUG
2881
2882 /*
2883  * The following adds a new attribute to the sysfs representation
2884  * of this device driver (i.e. a new file in /sys/class/net/wlan0/device/)
2885  * used for controlling the debug level.
2886  *
2887  * See the level definitions in iwl for details.
2888  */
2889
2890 static ssize_t show_debug_level(struct device *d,
2891                                 struct device_attribute *attr, char *buf)
2892 {
2893         struct iwl_priv *priv = d->driver_data;
2894
2895         return sprintf(buf, "0x%08X\n", priv->debug_level);
2896 }
2897 static ssize_t store_debug_level(struct device *d,
2898                                 struct device_attribute *attr,
2899                                  const char *buf, size_t count)
2900 {
2901         struct iwl_priv *priv = d->driver_data;
2902         unsigned long val;
2903         int ret;
2904
2905         ret = strict_strtoul(buf, 0, &val);
2906         if (ret)
2907                 IWL_ERR(priv, "%s is not in hex or decimal form.\n", buf);
2908         else
2909                 priv->debug_level = val;
2910
2911         return strnlen(buf, count);
2912 }
2913
2914 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
2915                         show_debug_level, store_debug_level);
2916
2917
2918 #endif /* CONFIG_IWLWIFI_DEBUG */
2919
2920
2921 static ssize_t show_version(struct device *d,
2922                                 struct device_attribute *attr, char *buf)
2923 {
2924         struct iwl_priv *priv = d->driver_data;
2925         struct iwl_alive_resp *palive = &priv->card_alive;
2926         ssize_t pos = 0;
2927         u16 eeprom_ver;
2928
2929         if (palive->is_valid)
2930                 pos += sprintf(buf + pos,
2931                                 "fw version: 0x%01X.0x%01X.0x%01X.0x%01X\n"
2932                                 "fw type: 0x%01X 0x%01X\n",
2933                                 palive->ucode_major, palive->ucode_minor,
2934                                 palive->sw_rev[0], palive->sw_rev[1],
2935                                 palive->ver_type, palive->ver_subtype);
2936         else
2937                 pos += sprintf(buf + pos, "fw not loaded\n");
2938
2939         if (priv->eeprom) {
2940                 eeprom_ver = iwl_eeprom_query16(priv, EEPROM_VERSION);
2941                 pos += sprintf(buf + pos, "EEPROM version: 0x%x\n",
2942                                  eeprom_ver);
2943         } else {
2944                 pos += sprintf(buf + pos, "EEPROM not initialzed\n");
2945         }
2946
2947         return pos;
2948 }
2949
2950 static DEVICE_ATTR(version, S_IWUSR | S_IRUGO, show_version, NULL);
2951
2952 static ssize_t show_temperature(struct device *d,
2953                                 struct device_attribute *attr, char *buf)
2954 {
2955         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
2956
2957         if (!iwl_is_alive(priv))
2958                 return -EAGAIN;
2959
2960         return sprintf(buf, "%d\n", priv->temperature);
2961 }
2962
2963 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
2964
2965 static ssize_t show_tx_power(struct device *d,
2966                              struct device_attribute *attr, char *buf)
2967 {
2968         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
2969
2970         if (!iwl_is_ready_rf(priv))
2971                 return sprintf(buf, "off\n");
2972         else
2973                 return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
2974 }
2975
2976 static ssize_t store_tx_power(struct device *d,
2977                               struct device_attribute *attr,
2978                               const char *buf, size_t count)
2979 {
2980         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
2981         unsigned long val;
2982         int ret;
2983
2984         ret = strict_strtoul(buf, 10, &val);
2985         if (ret)
2986                 IWL_INFO(priv, "%s is not in decimal form.\n", buf);
2987         else
2988                 iwl_set_tx_power(priv, val, false);
2989
2990         return count;
2991 }
2992
2993 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
2994
2995 static ssize_t show_flags(struct device *d,
2996                           struct device_attribute *attr, char *buf)
2997 {
2998         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
2999
3000         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
3001 }
3002
3003 static ssize_t store_flags(struct device *d,
3004                            struct device_attribute *attr,
3005                            const char *buf, size_t count)
3006 {
3007         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3008         unsigned long val;
3009         u32 flags;
3010         int ret = strict_strtoul(buf, 0, &val);
3011         if (ret)
3012                 return ret;
3013         flags = (u32)val;
3014
3015         mutex_lock(&priv->mutex);
3016         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
3017                 /* Cancel any currently running scans... */
3018                 if (iwl_scan_cancel_timeout(priv, 100))
3019                         IWL_WARN(priv, "Could not cancel scan.\n");
3020                 else {
3021                         IWL_DEBUG_INFO(priv, "Commit rxon.flags = 0x%04X\n", flags);
3022                         priv->staging_rxon.flags = cpu_to_le32(flags);
3023                         iwl_commit_rxon(priv);
3024                 }
3025         }
3026         mutex_unlock(&priv->mutex);
3027
3028         return count;
3029 }
3030
3031 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
3032
3033 static ssize_t show_filter_flags(struct device *d,
3034                                  struct device_attribute *attr, char *buf)
3035 {
3036         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3037
3038         return sprintf(buf, "0x%04X\n",
3039                 le32_to_cpu(priv->active_rxon.filter_flags));
3040 }
3041
3042 static ssize_t store_filter_flags(struct device *d,
3043                                   struct device_attribute *attr,
3044                                   const char *buf, size_t count)
3045 {
3046         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3047         unsigned long val;
3048         u32 filter_flags;
3049         int ret = strict_strtoul(buf, 0, &val);
3050         if (ret)
3051                 return ret;
3052         filter_flags = (u32)val;
3053
3054         mutex_lock(&priv->mutex);
3055         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
3056                 /* Cancel any currently running scans... */
3057                 if (iwl_scan_cancel_timeout(priv, 100))
3058                         IWL_WARN(priv, "Could not cancel scan.\n");
3059                 else {
3060                         IWL_DEBUG_INFO(priv, "Committing rxon.filter_flags = "
3061                                        "0x%04X\n", filter_flags);
3062                         priv->staging_rxon.filter_flags =
3063                                 cpu_to_le32(filter_flags);
3064                         iwl_commit_rxon(priv);
3065                 }
3066         }
3067         mutex_unlock(&priv->mutex);
3068
3069         return count;
3070 }
3071
3072 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
3073                    store_filter_flags);
3074
3075 static ssize_t store_power_level(struct device *d,
3076                                  struct device_attribute *attr,
3077                                  const char *buf, size_t count)
3078 {
3079         struct iwl_priv *priv = dev_get_drvdata(d);
3080         int ret;
3081         unsigned long mode;
3082
3083
3084         mutex_lock(&priv->mutex);
3085
3086         if (!iwl_is_ready(priv)) {
3087                 ret = -EAGAIN;
3088                 goto out;
3089         }
3090
3091         ret = strict_strtoul(buf, 10, &mode);
3092         if (ret)
3093                 goto out;
3094
3095         ret = iwl_power_set_user_mode(priv, mode);
3096         if (ret) {
3097                 IWL_DEBUG_MAC80211(priv, "failed setting power mode.\n");
3098                 goto out;
3099         }
3100         ret = count;
3101
3102  out:
3103         mutex_unlock(&priv->mutex);
3104         return ret;
3105 }
3106
3107 static ssize_t show_power_level(struct device *d,
3108                                 struct device_attribute *attr, char *buf)
3109 {
3110         struct iwl_priv *priv = dev_get_drvdata(d);
3111         int mode = priv->power_data.user_power_setting;
3112         int system = priv->power_data.system_power_setting;
3113         int level = priv->power_data.power_mode;
3114         char *p = buf;
3115
3116         switch (system) {
3117         case IWL_POWER_SYS_AUTO:
3118                 p += sprintf(p, "SYSTEM:auto");
3119                 break;
3120         case IWL_POWER_SYS_AC:
3121                 p += sprintf(p, "SYSTEM:ac");
3122                 break;
3123         case IWL_POWER_SYS_BATTERY:
3124                 p += sprintf(p, "SYSTEM:battery");
3125                 break;
3126         }
3127
3128         p += sprintf(p, "\tMODE:%s", (mode < IWL_POWER_AUTO) ?
3129                         "fixed" : "auto");
3130         p += sprintf(p, "\tINDEX:%d", level);
3131         p += sprintf(p, "\n");
3132         return p - buf + 1;
3133 }
3134
3135 static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR, show_power_level,
3136                    store_power_level);
3137
3138
3139 static ssize_t show_statistics(struct device *d,
3140                                struct device_attribute *attr, char *buf)
3141 {
3142         struct iwl_priv *priv = dev_get_drvdata(d);
3143         u32 size = sizeof(struct iwl_notif_statistics);
3144         u32 len = 0, ofs = 0;
3145         u8 *data = (u8 *)&priv->statistics;
3146         int rc = 0;
3147
3148         if (!iwl_is_alive(priv))
3149                 return -EAGAIN;
3150
3151         mutex_lock(&priv->mutex);
3152         rc = iwl_send_statistics_request(priv, 0);
3153         mutex_unlock(&priv->mutex);
3154
3155         if (rc) {
3156                 len = sprintf(buf,
3157                               "Error sending statistics request: 0x%08X\n", rc);
3158                 return len;
3159         }
3160
3161         while (size && (PAGE_SIZE - len)) {
3162                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3163                                    PAGE_SIZE - len, 1);
3164                 len = strlen(buf);
3165                 if (PAGE_SIZE - len)
3166                         buf[len++] = '\n';
3167
3168                 ofs += 16;
3169                 size -= min(size, 16U);
3170         }
3171
3172         return len;
3173 }
3174
3175 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
3176
3177
3178 /*****************************************************************************
3179  *
3180  * driver setup and teardown
3181  *
3182  *****************************************************************************/
3183
3184 static void iwl_setup_deferred_work(struct iwl_priv *priv)
3185 {
3186         priv->workqueue = create_singlethread_workqueue(DRV_NAME);
3187
3188         init_waitqueue_head(&priv->wait_command_queue);
3189
3190         INIT_WORK(&priv->up, iwl_bg_up);
3191         INIT_WORK(&priv->restart, iwl_bg_restart);
3192         INIT_WORK(&priv->rx_replenish, iwl_bg_rx_replenish);
3193         INIT_WORK(&priv->rf_kill, iwl_bg_rf_kill);
3194         INIT_WORK(&priv->beacon_update, iwl_bg_beacon_update);
3195         INIT_WORK(&priv->run_time_calib_work, iwl_bg_run_time_calib_work);
3196         INIT_DELAYED_WORK(&priv->init_alive_start, iwl_bg_init_alive_start);
3197         INIT_DELAYED_WORK(&priv->alive_start, iwl_bg_alive_start);
3198
3199         iwl_setup_scan_deferred_work(priv);
3200         iwl_setup_power_deferred_work(priv);
3201
3202         if (priv->cfg->ops->lib->setup_deferred_work)
3203                 priv->cfg->ops->lib->setup_deferred_work(priv);
3204
3205         init_timer(&priv->statistics_periodic);
3206         priv->statistics_periodic.data = (unsigned long)priv;
3207         priv->statistics_periodic.function = iwl_bg_statistics_periodic;
3208
3209         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
3210                      iwl_irq_tasklet, (unsigned long)priv);
3211 }
3212
3213 static void iwl_cancel_deferred_work(struct iwl_priv *priv)
3214 {
3215         if (priv->cfg->ops->lib->cancel_deferred_work)
3216                 priv->cfg->ops->lib->cancel_deferred_work(priv);
3217
3218         cancel_delayed_work_sync(&priv->init_alive_start);
3219         cancel_delayed_work(&priv->scan_check);
3220         cancel_delayed_work_sync(&priv->set_power_save);
3221         cancel_delayed_work(&priv->alive_start);
3222         cancel_work_sync(&priv->beacon_update);
3223         del_timer_sync(&priv->statistics_periodic);
3224 }
3225
3226 static struct attribute *iwl_sysfs_entries[] = {
3227         &dev_attr_flags.attr,
3228         &dev_attr_filter_flags.attr,
3229         &dev_attr_power_level.attr,
3230         &dev_attr_statistics.attr,
3231         &dev_attr_temperature.attr,
3232         &dev_attr_tx_power.attr,
3233 #ifdef CONFIG_IWLWIFI_DEBUG
3234         &dev_attr_debug_level.attr,
3235 #endif
3236         &dev_attr_version.attr,
3237
3238         NULL
3239 };
3240
3241 static struct attribute_group iwl_attribute_group = {
3242         .name = NULL,           /* put in device directory */
3243         .attrs = iwl_sysfs_entries,
3244 };
3245
3246 static struct ieee80211_ops iwl_hw_ops = {
3247         .tx = iwl_mac_tx,
3248         .start = iwl_mac_start,
3249         .stop = iwl_mac_stop,
3250         .add_interface = iwl_mac_add_interface,
3251         .remove_interface = iwl_mac_remove_interface,
3252         .config = iwl_mac_config,
3253         .config_interface = iwl_mac_config_interface,
3254         .configure_filter = iwl_configure_filter,
3255         .set_key = iwl_mac_set_key,
3256         .update_tkip_key = iwl_mac_update_tkip_key,
3257         .get_stats = iwl_mac_get_stats,
3258         .get_tx_stats = iwl_mac_get_tx_stats,
3259         .conf_tx = iwl_mac_conf_tx,
3260         .reset_tsf = iwl_mac_reset_tsf,
3261         .bss_info_changed = iwl_bss_info_changed,
3262         .ampdu_action = iwl_mac_ampdu_action,
3263         .hw_scan = iwl_mac_hw_scan
3264 };
3265
3266 static int iwl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3267 {
3268         int err = 0;
3269         struct iwl_priv *priv;
3270         struct ieee80211_hw *hw;
3271         struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
3272         unsigned long flags;
3273         u16 pci_cmd;
3274
3275         /************************
3276          * 1. Allocating HW data
3277          ************************/
3278
3279         /* Disabling hardware scan means that mac80211 will perform scans
3280          * "the hard way", rather than using device's scan. */
3281         if (cfg->mod_params->disable_hw_scan) {
3282                 if (cfg->mod_params->debug & IWL_DL_INFO)
3283                         dev_printk(KERN_DEBUG, &(pdev->dev),
3284                                    "Disabling hw_scan\n");
3285                 iwl_hw_ops.hw_scan = NULL;
3286         }
3287
3288         hw = iwl_alloc_all(cfg, &iwl_hw_ops);
3289         if (!hw) {
3290                 err = -ENOMEM;
3291                 goto out;
3292         }
3293         priv = hw->priv;
3294         /* At this point both hw and priv are allocated. */
3295
3296         SET_IEEE80211_DEV(hw, &pdev->dev);
3297
3298         IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
3299         priv->cfg = cfg;
3300         priv->pci_dev = pdev;
3301
3302 #ifdef CONFIG_IWLWIFI_DEBUG
3303         priv->debug_level = priv->cfg->mod_params->debug;
3304         atomic_set(&priv->restrict_refcnt, 0);
3305 #endif
3306
3307         /**************************
3308          * 2. Initializing PCI bus
3309          **************************/
3310         if (pci_enable_device(pdev)) {
3311                 err = -ENODEV;
3312                 goto out_ieee80211_free_hw;
3313         }
3314
3315         pci_set_master(pdev);
3316
3317         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(36));
3318         if (!err)
3319                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(36));
3320         if (err) {
3321                 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
3322                 if (!err)
3323                         err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
3324                 /* both attempts failed: */
3325                 if (err) {
3326                         IWL_WARN(priv, "No suitable DMA available.\n");
3327                         goto out_pci_disable_device;
3328                 }
3329         }
3330
3331         err = pci_request_regions(pdev, DRV_NAME);
3332         if (err)
3333                 goto out_pci_disable_device;
3334
3335         pci_set_drvdata(pdev, priv);
3336
3337
3338         /***********************
3339          * 3. Read REV register
3340          ***********************/
3341         priv->hw_base = pci_iomap(pdev, 0, 0);
3342         if (!priv->hw_base) {
3343                 err = -ENODEV;
3344                 goto out_pci_release_regions;
3345         }
3346
3347         IWL_DEBUG_INFO(priv, "pci_resource_len = 0x%08llx\n",
3348                 (unsigned long long) pci_resource_len(pdev, 0));
3349         IWL_DEBUG_INFO(priv, "pci_resource_base = %p\n", priv->hw_base);
3350
3351         iwl_hw_detect(priv);
3352         IWL_INFO(priv, "Detected Intel Wireless WiFi Link %s REV=0x%X\n",
3353                 priv->cfg->name, priv->hw_rev);
3354
3355         /* We disable the RETRY_TIMEOUT register (0x41) to keep
3356          * PCI Tx retries from interfering with C3 CPU state */
3357         pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
3358
3359         /* amp init */
3360         err = priv->cfg->ops->lib->apm_ops.init(priv);
3361         if (err < 0) {
3362                 IWL_DEBUG_INFO(priv, "Failed to init APMG\n");
3363                 goto out_iounmap;
3364         }
3365         /*****************
3366          * 4. Read EEPROM
3367          *****************/
3368         /* Read the EEPROM */
3369         err = iwl_eeprom_init(priv);
3370         if (err) {
3371                 IWL_ERR(priv, "Unable to init EEPROM\n");
3372                 goto out_iounmap;
3373         }
3374         err = iwl_eeprom_check_version(priv);
3375         if (err)
3376                 goto out_free_eeprom;
3377
3378         /* extract MAC Address */
3379         iwl_eeprom_get_mac(priv, priv->mac_addr);
3380         IWL_DEBUG_INFO(priv, "MAC address: %pM\n", priv->mac_addr);
3381         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
3382
3383         /************************
3384          * 5. Setup HW constants
3385          ************************/
3386         if (iwl_set_hw_params(priv)) {
3387                 IWL_ERR(priv, "failed to set hw parameters\n");
3388                 goto out_free_eeprom;
3389         }
3390
3391         /*******************
3392          * 6. Setup priv
3393          *******************/
3394
3395         err = iwl_init_drv(priv);
3396         if (err)
3397                 goto out_free_eeprom;
3398         /* At this point both hw and priv are initialized. */
3399
3400         /**********************************
3401          * 7. Initialize module parameters
3402          **********************************/
3403
3404         /* Disable radio (SW RF KILL) via parameter when loading driver */
3405         if (priv->cfg->mod_params->disable) {
3406                 set_bit(STATUS_RF_KILL_SW, &priv->status);
3407                 IWL_DEBUG_INFO(priv, "Radio disabled.\n");
3408         }
3409
3410         /********************
3411          * 8. Setup services
3412          ********************/
3413         spin_lock_irqsave(&priv->lock, flags);
3414         iwl_disable_interrupts(priv);
3415         spin_unlock_irqrestore(&priv->lock, flags);
3416
3417         pci_enable_msi(priv->pci_dev);
3418
3419         err = request_irq(priv->pci_dev->irq, iwl_isr, IRQF_SHARED,
3420                           DRV_NAME, priv);
3421         if (err) {
3422                 IWL_ERR(priv, "Error allocating IRQ %d\n", priv->pci_dev->irq);
3423                 goto out_disable_msi;
3424         }
3425         err = sysfs_create_group(&pdev->dev.kobj, &iwl_attribute_group);
3426         if (err) {
3427                 IWL_ERR(priv, "failed to create sysfs device attributes\n");
3428                 goto out_free_irq;
3429         }
3430
3431         iwl_setup_deferred_work(priv);
3432         iwl_setup_rx_handlers(priv);
3433
3434         /**********************************
3435          * 9. Setup and register mac80211
3436          **********************************/
3437
3438         /* enable interrupts if needed: hw bug w/a */
3439         pci_read_config_word(priv->pci_dev, PCI_COMMAND, &pci_cmd);
3440         if (pci_cmd & PCI_COMMAND_INTX_DISABLE) {
3441                 pci_cmd &= ~PCI_COMMAND_INTX_DISABLE;
3442                 pci_write_config_word(priv->pci_dev, PCI_COMMAND, pci_cmd);
3443         }
3444
3445         iwl_enable_interrupts(priv);
3446
3447         err = iwl_setup_mac(priv);
3448         if (err)
3449                 goto out_remove_sysfs;
3450
3451         err = iwl_dbgfs_register(priv, DRV_NAME);
3452         if (err)
3453                 IWL_ERR(priv, "failed to create debugfs files\n");
3454
3455         /* If platform's RF_KILL switch is NOT set to KILL */
3456         if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
3457                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
3458         else
3459                 set_bit(STATUS_RF_KILL_HW, &priv->status);
3460
3461         err = iwl_rfkill_init(priv);
3462         if (err)
3463                 IWL_ERR(priv, "Unable to initialize RFKILL system. "
3464                                   "Ignoring error: %d\n", err);
3465         else
3466                 iwl_rfkill_set_hw_state(priv);
3467
3468         iwl_power_initialize(priv);
3469         return 0;
3470
3471  out_remove_sysfs:
3472         destroy_workqueue(priv->workqueue);
3473         priv->workqueue = NULL;
3474         sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
3475  out_free_irq:
3476         free_irq(priv->pci_dev->irq, priv);
3477  out_disable_msi:
3478         pci_disable_msi(priv->pci_dev);
3479         iwl_uninit_drv(priv);
3480  out_free_eeprom:
3481         iwl_eeprom_free(priv);
3482  out_iounmap:
3483         pci_iounmap(pdev, priv->hw_base);
3484  out_pci_release_regions:
3485         pci_set_drvdata(pdev, NULL);
3486         pci_release_regions(pdev);
3487  out_pci_disable_device:
3488         pci_disable_device(pdev);
3489  out_ieee80211_free_hw:
3490         ieee80211_free_hw(priv->hw);
3491  out:
3492         return err;
3493 }
3494
3495 static void __devexit iwl_pci_remove(struct pci_dev *pdev)
3496 {
3497         struct iwl_priv *priv = pci_get_drvdata(pdev);
3498         unsigned long flags;
3499
3500         if (!priv)
3501                 return;
3502
3503         IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
3504
3505         iwl_dbgfs_unregister(priv);
3506         sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
3507
3508         /* ieee80211_unregister_hw call wil cause iwl_mac_stop to
3509          * to be called and iwl_down since we are removing the device
3510          * we need to set STATUS_EXIT_PENDING bit.
3511          */
3512         set_bit(STATUS_EXIT_PENDING, &priv->status);
3513         if (priv->mac80211_registered) {
3514                 ieee80211_unregister_hw(priv->hw);
3515                 priv->mac80211_registered = 0;
3516         } else {
3517                 iwl_down(priv);
3518         }
3519
3520         /* make sure we flush any pending irq or
3521          * tasklet for the driver
3522          */
3523         spin_lock_irqsave(&priv->lock, flags);
3524         iwl_disable_interrupts(priv);
3525         spin_unlock_irqrestore(&priv->lock, flags);
3526
3527         iwl_synchronize_irq(priv);
3528
3529         iwl_rfkill_unregister(priv);
3530         iwl_dealloc_ucode_pci(priv);
3531
3532         if (priv->rxq.bd)
3533                 iwl_rx_queue_free(priv, &priv->rxq);
3534         iwl_hw_txq_ctx_free(priv);
3535
3536         iwl_clear_stations_table(priv);
3537         iwl_eeprom_free(priv);
3538
3539
3540         /*netif_stop_queue(dev); */
3541         flush_workqueue(priv->workqueue);
3542
3543         /* ieee80211_unregister_hw calls iwl_mac_stop, which flushes
3544          * priv->workqueue... so we can't take down the workqueue
3545          * until now... */
3546         destroy_workqueue(priv->workqueue);
3547         priv->workqueue = NULL;
3548
3549         free_irq(priv->pci_dev->irq, priv);
3550         pci_disable_msi(priv->pci_dev);
3551         pci_iounmap(pdev, priv->hw_base);
3552         pci_release_regions(pdev);
3553         pci_disable_device(pdev);
3554         pci_set_drvdata(pdev, NULL);
3555
3556         iwl_uninit_drv(priv);
3557
3558         if (priv->ibss_beacon)
3559                 dev_kfree_skb(priv->ibss_beacon);
3560
3561         ieee80211_free_hw(priv->hw);
3562 }
3563
3564 #ifdef CONFIG_PM
3565
3566 static int iwl_pci_suspend(struct pci_dev *pdev, pm_message_t state)
3567 {
3568         struct iwl_priv *priv = pci_get_drvdata(pdev);
3569
3570         if (priv->is_open) {
3571                 set_bit(STATUS_IN_SUSPEND, &priv->status);
3572                 iwl_mac_stop(priv->hw);
3573                 priv->is_open = 1;
3574         }
3575
3576         pci_save_state(pdev);
3577         pci_disable_device(pdev);
3578         pci_set_power_state(pdev, PCI_D3hot);
3579
3580         return 0;
3581 }
3582
3583 static int iwl_pci_resume(struct pci_dev *pdev)
3584 {
3585         struct iwl_priv *priv = pci_get_drvdata(pdev);
3586         int ret;
3587
3588         pci_set_power_state(pdev, PCI_D0);
3589         ret = pci_enable_device(pdev);
3590         if (ret)
3591                 return ret;
3592         pci_restore_state(pdev);
3593         iwl_enable_interrupts(priv);
3594
3595         if (priv->is_open)
3596                 iwl_mac_start(priv->hw);
3597
3598         clear_bit(STATUS_IN_SUSPEND, &priv->status);
3599         return 0;
3600 }
3601
3602 #endif /* CONFIG_PM */
3603
3604 /*****************************************************************************
3605  *
3606  * driver and module entry point
3607  *
3608  *****************************************************************************/
3609
3610 /* Hardware specific file defines the PCI IDs table for that hardware module */
3611 static struct pci_device_id iwl_hw_card_ids[] = {
3612 #ifdef CONFIG_IWL4965
3613         {IWL_PCI_DEVICE(0x4229, PCI_ANY_ID, iwl4965_agn_cfg)},
3614         {IWL_PCI_DEVICE(0x4230, PCI_ANY_ID, iwl4965_agn_cfg)},
3615 #endif /* CONFIG_IWL4965 */
3616 #ifdef CONFIG_IWL5000
3617         {IWL_PCI_DEVICE(0x4232, 0x1205, iwl5100_bg_cfg)},
3618         {IWL_PCI_DEVICE(0x4232, 0x1305, iwl5100_bg_cfg)},
3619         {IWL_PCI_DEVICE(0x4232, 0x1206, iwl5100_abg_cfg)},
3620         {IWL_PCI_DEVICE(0x4232, 0x1306, iwl5100_abg_cfg)},
3621         {IWL_PCI_DEVICE(0x4232, 0x1326, iwl5100_abg_cfg)},
3622         {IWL_PCI_DEVICE(0x4237, 0x1216, iwl5100_abg_cfg)},
3623         {IWL_PCI_DEVICE(0x4232, PCI_ANY_ID, iwl5100_agn_cfg)},
3624         {IWL_PCI_DEVICE(0x4235, PCI_ANY_ID, iwl5300_agn_cfg)},
3625         {IWL_PCI_DEVICE(0x4236, PCI_ANY_ID, iwl5300_agn_cfg)},
3626         {IWL_PCI_DEVICE(0x4237, PCI_ANY_ID, iwl5100_agn_cfg)},
3627 /* 5350 WiFi/WiMax */
3628         {IWL_PCI_DEVICE(0x423A, 0x1001, iwl5350_agn_cfg)},
3629         {IWL_PCI_DEVICE(0x423A, 0x1021, iwl5350_agn_cfg)},
3630         {IWL_PCI_DEVICE(0x423B, 0x1011, iwl5350_agn_cfg)},
3631 /* 5150 Wifi/WiMax */
3632         {IWL_PCI_DEVICE(0x423C, PCI_ANY_ID, iwl5150_agn_cfg)},
3633         {IWL_PCI_DEVICE(0x423D, PCI_ANY_ID, iwl5150_agn_cfg)},
3634 /* 6000/6050 Series */
3635         {IWL_PCI_DEVICE(0x0082, 0x1102, iwl6000_2ag_cfg)},
3636         {IWL_PCI_DEVICE(0x0085, 0x1112, iwl6000_2ag_cfg)},
3637         {IWL_PCI_DEVICE(0x0082, 0x1122, iwl6000_2ag_cfg)},
3638         {IWL_PCI_DEVICE(0x422B, PCI_ANY_ID, iwl6000_3agn_cfg)},
3639         {IWL_PCI_DEVICE(0x4238, PCI_ANY_ID, iwl6000_3agn_cfg)},
3640         {IWL_PCI_DEVICE(0x0082, PCI_ANY_ID, iwl6000_2agn_cfg)},
3641         {IWL_PCI_DEVICE(0x0085, PCI_ANY_ID, iwl6000_3agn_cfg)},
3642         {IWL_PCI_DEVICE(0x0086, PCI_ANY_ID, iwl6050_3agn_cfg)},
3643         {IWL_PCI_DEVICE(0x0087, PCI_ANY_ID, iwl6050_2agn_cfg)},
3644         {IWL_PCI_DEVICE(0x0088, PCI_ANY_ID, iwl6050_3agn_cfg)},
3645         {IWL_PCI_DEVICE(0x0089, PCI_ANY_ID, iwl6050_2agn_cfg)},
3646 /* 100 Series WiFi */
3647         {IWL_PCI_DEVICE(0x0083, PCI_ANY_ID, iwl100_bgn_cfg)},
3648         {IWL_PCI_DEVICE(0x0084, PCI_ANY_ID, iwl100_bgn_cfg)},
3649 #endif /* CONFIG_IWL5000 */
3650
3651         {0}
3652 };
3653 MODULE_DEVICE_TABLE(pci, iwl_hw_card_ids);
3654
3655 static struct pci_driver iwl_driver = {
3656         .name = DRV_NAME,
3657         .id_table = iwl_hw_card_ids,
3658         .probe = iwl_pci_probe,
3659         .remove = __devexit_p(iwl_pci_remove),
3660 #ifdef CONFIG_PM
3661         .suspend = iwl_pci_suspend,
3662         .resume = iwl_pci_resume,
3663 #endif
3664 };
3665
3666 static int __init iwl_init(void)
3667 {
3668
3669         int ret;
3670         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
3671         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
3672
3673         ret = iwlagn_rate_control_register();
3674         if (ret) {
3675                 printk(KERN_ERR DRV_NAME
3676                        "Unable to register rate control algorithm: %d\n", ret);
3677                 return ret;
3678         }
3679
3680         ret = pci_register_driver(&iwl_driver);
3681         if (ret) {
3682                 printk(KERN_ERR DRV_NAME "Unable to initialize PCI module\n");
3683                 goto error_register;
3684         }
3685
3686         return ret;
3687
3688 error_register:
3689         iwlagn_rate_control_unregister();
3690         return ret;
3691 }
3692
3693 static void __exit iwl_exit(void)
3694 {
3695         pci_unregister_driver(&iwl_driver);
3696         iwlagn_rate_control_unregister();
3697 }
3698
3699 module_exit(iwl_exit);
3700 module_init(iwl_init);