SAFE public projects git trees. - safe/jmp/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_IWLAGN_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_TODEVICE);
 448
 449         /* Unmap chunks, if any. */
 450         for (i = 1; i < num_tbs; i++) {
 451                 pci_unmap_single(dev, iwl_tfd_tb_get_addr(tfd, i),
 452                                 iwl_tfd_tb_get_len(tfd, i), PCI_DMA_TODEVICE);
 453
 454                 if (txq->txb) {
 455                         dev_kfree_skb(txq->txb[txq->q.read_ptr].skb[i - 1]);
 456                         txq->txb[txq->q.read_ptr].skb[i - 1] = NULL;
 457                 }
 458         }
 459 }
 460
 461 int iwl_hw_txq_attach_buf_to_tfd(struct iwl_priv *priv,
 462                                  struct iwl_tx_queue *txq,
 463                                  dma_addr_t addr, u16 len,
 464                                  u8 reset, u8 pad)
 465 {
 466         struct iwl_queue *q;
 467         struct iwl_tfd *tfd, *tfd_tmp;
 468         u32 num_tbs;
 469
 470         q = &txq->q;
 471         tfd_tmp = (struct iwl_tfd *)txq->tfds;
 472         tfd = &tfd_tmp[q->write_ptr];
 473
 474         if (reset)
 475                 memset(tfd, 0, sizeof(*tfd));
 476
 477         num_tbs = iwl_tfd_get_num_tbs(tfd);
 478
 479         /* Each TFD can point to a maximum 20 Tx buffers */
 480         if (num_tbs >= IWL_NUM_OF_TBS) {
 481                 IWL_ERR(priv, "Error can not send more than %d chunks\n",
 482                           IWL_NUM_OF_TBS);
 483                 return -EINVAL;
 484         }
 485
 486         BUG_ON(addr & ~DMA_BIT_MASK(36));
 487         if (unlikely(addr & ~IWL_TX_DMA_MASK))
 488                 IWL_ERR(priv, "Unaligned address = %llx\n",
 489                           (unsigned long long)addr);
 490
 491         iwl_tfd_set_tb(tfd, num_tbs, addr, len);
 492
 493         return 0;
 494 }
 495
 496 /*
 497  * Tell nic where to find circular buffer of Tx Frame Descriptors for
 498  * given Tx queue, and enable the DMA channel used for that queue.
 499  *
 500  * 4965 supports up to 16 Tx queues in DRAM, mapped to up to 8 Tx DMA
 501  * channels supported in hardware.
 502  */
 503 int iwl_hw_tx_queue_init(struct iwl_priv *priv,
 504                          struct iwl_tx_queue *txq)
 505 {
 506         int ret;
 507         unsigned long flags;
 508         int txq_id = txq->q.id;
 509
 510         spin_lock_irqsave(&priv->lock, flags);
 511         ret = iwl_grab_nic_access(priv);
 512         if (ret) {
 513                 spin_unlock_irqrestore(&priv->lock, flags);
 514                 return ret;
 515         }
 516
 517         /* Circular buffer (TFD queue in DRAM) physical base address */
 518         iwl_write_direct32(priv, FH_MEM_CBBC_QUEUE(txq_id),
 519                              txq->q.dma_addr >> 8);
 520
 521         iwl_release_nic_access(priv);
 522         spin_unlock_irqrestore(&priv->lock, flags);
 523
 524         return 0;
 525 }
 526
 527
 528 /******************************************************************************
 529  *
 530  * Misc. internal state and helper functions
 531  *
 532  ******************************************************************************/
 533
 534 static void iwl_ht_conf(struct iwl_priv *priv,
 535                             struct ieee80211_bss_conf *bss_conf)
 536 {
 537         struct ieee80211_sta_ht_cap *ht_conf;
 538         struct iwl_ht_info *iwl_conf = &priv->current_ht_config;
 539         struct ieee80211_sta *sta;
 540
 541         IWL_DEBUG_MAC80211(priv, "enter: \n");
 542
 543         if (!iwl_conf->is_ht)
 544                 return;
 545
 546
 547         /*
 548          * It is totally wrong to base global information on something
 549          * that is valid only when associated, alas, this driver works
 550          * that way and I don't know how to fix it.
 551          */
 552
 553         rcu_read_lock();
 554         sta = ieee80211_find_sta(priv->hw, priv->bssid);
 555         if (!sta) {
 556                 rcu_read_unlock();
 557                 return;
 558         }
 559         ht_conf = &sta->ht_cap;
 560
 561         if (ht_conf->cap & IEEE80211_HT_CAP_SGI_20)
 562                 iwl_conf->sgf |= HT_SHORT_GI_20MHZ;
 563         if (ht_conf->cap & IEEE80211_HT_CAP_SGI_40)
 564                 iwl_conf->sgf |= HT_SHORT_GI_40MHZ;
 565
 566         iwl_conf->is_green_field = !!(ht_conf->cap & IEEE80211_HT_CAP_GRN_FLD);
 567         iwl_conf->max_amsdu_size =
 568                 !!(ht_conf->cap & IEEE80211_HT_CAP_MAX_AMSDU);
 569
 570         iwl_conf->supported_chan_width =
 571                 !!(ht_conf->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40);
 572
 573         /*
 574          * XXX: The HT configuration needs to be moved into iwl_mac_config()
 575          *      to be done there correctly.
 576          */
 577
 578         iwl_conf->extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE;
 579         if (conf_is_ht40_minus(&priv->hw->conf))
 580                 iwl_conf->extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
 581         else if (conf_is_ht40_plus(&priv->hw->conf))
 582                 iwl_conf->extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
 583
 584         /* If no above or below channel supplied disable FAT channel */
 585         if (iwl_conf->extension_chan_offset != IEEE80211_HT_PARAM_CHA_SEC_ABOVE &&
 586             iwl_conf->extension_chan_offset != IEEE80211_HT_PARAM_CHA_SEC_BELOW)
 587                 iwl_conf->supported_chan_width = 0;
 588
 589         iwl_conf->sm_ps = (u8)((ht_conf->cap & IEEE80211_HT_CAP_SM_PS) >> 2);
 590
 591         memcpy(&iwl_conf->mcs, &ht_conf->mcs, 16);
 592
 593         iwl_conf->tx_chan_width = iwl_conf->supported_chan_width != 0;
 594         iwl_conf->ht_protection =
 595                 bss_conf->ht.operation_mode & IEEE80211_HT_OP_MODE_PROTECTION;
 596         iwl_conf->non_GF_STA_present =
 597                 !!(bss_conf->ht.operation_mode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
 598
 599         rcu_read_unlock();
 600
 601         IWL_DEBUG_MAC80211(priv, "leave\n");
 602 }
 603
 604 /*
 605  * QoS  support
 606 */
 607 static void iwl_activate_qos(struct iwl_priv *priv, u8 force)
 608 {
 609         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 610                 return;
 611
 612         priv->qos_data.def_qos_parm.qos_flags = 0;
 613
 614         if (priv->qos_data.qos_cap.q_AP.queue_request &&
 615             !priv->qos_data.qos_cap.q_AP.txop_request)
 616                 priv->qos_data.def_qos_parm.qos_flags |=
 617                         QOS_PARAM_FLG_TXOP_TYPE_MSK;
 618         if (priv->qos_data.qos_active)
 619                 priv->qos_data.def_qos_parm.qos_flags |=
 620                         QOS_PARAM_FLG_UPDATE_EDCA_MSK;
 621
 622         if (priv->current_ht_config.is_ht)
 623                 priv->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
 624
 625         if (force || iwl_is_associated(priv)) {
 626                 IWL_DEBUG_QOS(priv, "send QoS cmd with Qos active=%d FLAGS=0x%X\n",
 627                                 priv->qos_data.qos_active,
 628                                 priv->qos_data.def_qos_parm.qos_flags);
 629
 630                 iwl_send_cmd_pdu_async(priv, REPLY_QOS_PARAM,
 631                                        sizeof(struct iwl_qosparam_cmd),
 632                                        &priv->qos_data.def_qos_parm, NULL);
 633         }
 634 }
 635
 636 #define MAX_UCODE_BEACON_INTERVAL       4096
 637
 638 static u16 iwl_adjust_beacon_interval(u16 beacon_val)
 639 {
 640         u16 new_val = 0;
 641         u16 beacon_factor = 0;
 642
 643         beacon_factor = (beacon_val + MAX_UCODE_BEACON_INTERVAL)
 644                                         / MAX_UCODE_BEACON_INTERVAL;
 645         new_val = beacon_val / beacon_factor;
 646
 647         return new_val;
 648 }
 649
 650 static void iwl_setup_rxon_timing(struct iwl_priv *priv)
 651 {
 652         u64 tsf;
 653         s32 interval_tm, rem;
 654         unsigned long flags;
 655         struct ieee80211_conf *conf = NULL;
 656         u16 beacon_int = 0;
 657
 658         conf = ieee80211_get_hw_conf(priv->hw);
 659
 660         spin_lock_irqsave(&priv->lock, flags);
 661         priv->rxon_timing.timestamp = cpu_to_le64(priv->timestamp);
 662         priv->rxon_timing.listen_interval = cpu_to_le16(conf->listen_interval);
 663
 664         if (priv->iw_mode == NL80211_IFTYPE_STATION) {
 665                 beacon_int = iwl_adjust_beacon_interval(priv->beacon_int);
 666                 priv->rxon_timing.atim_window = 0;
 667         } else {
 668                 beacon_int = iwl_adjust_beacon_interval(conf->beacon_int);
 669
 670                 /* TODO: we need to get atim_window from upper stack
 671                  * for now we set to 0 */
 672                 priv->rxon_timing.atim_window = 0;
 673         }
 674
 675         priv->rxon_timing.beacon_interval = cpu_to_le16(beacon_int);
 676
 677         tsf = priv->timestamp; /* tsf is modifed by do_div: copy it */
 678         interval_tm = beacon_int * 1024;
 679         rem = do_div(tsf, interval_tm);
 680         priv->rxon_timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
 681
 682         spin_unlock_irqrestore(&priv->lock, flags);
 683         IWL_DEBUG_ASSOC(priv, "beacon interval %d beacon timer %d beacon tim %d\n",
 684                         le16_to_cpu(priv->rxon_timing.beacon_interval),
 685                         le32_to_cpu(priv->rxon_timing.beacon_init_val),
 686                         le16_to_cpu(priv->rxon_timing.atim_window));
 687 }
 688
 689 static int iwl_set_mode(struct iwl_priv *priv, int mode)
 690 {
 691         iwl_connection_init_rx_config(priv, mode);
 692         iwl_set_rxon_chain(priv);
 693         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
 694
 695         iwl_clear_stations_table(priv);
 696
 697         /* dont commit rxon if rf-kill is on*/
 698         if (!iwl_is_ready_rf(priv))
 699                 return -EAGAIN;
 700
 701         cancel_delayed_work(&priv->scan_check);
 702         if (iwl_scan_cancel_timeout(priv, 100)) {
 703                 IWL_WARN(priv, "Aborted scan still in progress after 100ms\n");
 704                 IWL_DEBUG_MAC80211(priv, "leaving - scan abort failed.\n");
 705                 return -EAGAIN;
 706         }
 707
 708         iwl_commit_rxon(priv);
 709
 710         return 0;
 711 }
 712
 713 /******************************************************************************
 714  *
 715  * Generic RX handler implementations
 716  *
 717  ******************************************************************************/
 718 static void iwl_rx_reply_alive(struct iwl_priv *priv,
 719                                 struct iwl_rx_mem_buffer *rxb)
 720 {
 721         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
 722         struct iwl_alive_resp *palive;
 723         struct delayed_work *pwork;
 724
 725         palive = &pkt->u.alive_frame;
 726
 727         IWL_DEBUG_INFO(priv, "Alive ucode status 0x%08X revision "
 728                        "0x%01X 0x%01X\n",
 729                        palive->is_valid, palive->ver_type,
 730                        palive->ver_subtype);
 731
 732         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
 733                 IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
 734                 memcpy(&priv->card_alive_init,
 735                        &pkt->u.alive_frame,
 736                        sizeof(struct iwl_init_alive_resp));
 737                 pwork = &priv->init_alive_start;
 738         } else {
 739                 IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
 740                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
 741                        sizeof(struct iwl_alive_resp));
 742                 pwork = &priv->alive_start;
 743         }
 744
 745         /* We delay the ALIVE response by 5ms to
 746          * give the HW RF Kill time to activate... */
 747         if (palive->is_valid == UCODE_VALID_OK)
 748                 queue_delayed_work(priv->workqueue, pwork,
 749                                    msecs_to_jiffies(5));
 750         else
 751                 IWL_WARN(priv, "uCode did not respond OK.\n");
 752 }
 753
 754 static void iwl_rx_reply_error(struct iwl_priv *priv,
 755                                    struct iwl_rx_mem_buffer *rxb)
 756 {
 757         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
 758
 759         IWL_ERR(priv, "Error Reply type 0x%08X cmd %s (0x%02X) "
 760                 "seq 0x%04X ser 0x%08X\n",
 761                 le32_to_cpu(pkt->u.err_resp.error_type),
 762                 get_cmd_string(pkt->u.err_resp.cmd_id),
 763                 pkt->u.err_resp.cmd_id,
 764                 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
 765                 le32_to_cpu(pkt->u.err_resp.error_info));
 766 }
 767
 768 static void iwl_rx_pm_sleep_notif(struct iwl_priv *priv,
 769                                       struct iwl_rx_mem_buffer *rxb)
 770 {
 771 #ifdef CONFIG_IWLWIFI_DEBUG
 772         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
 773         struct iwl_sleep_notification *sleep = &(pkt->u.sleep_notif);
 774         IWL_DEBUG_RX(priv, "sleep mode: %d, src: %d\n",
 775                      sleep->pm_sleep_mode, sleep->pm_wakeup_src);
 776 #endif
 777 }
 778
 779 static void iwl_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
 780                                              struct iwl_rx_mem_buffer *rxb)
 781 {
 782         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
 783         IWL_DEBUG_RADIO(priv, "Dumping %d bytes of unhandled "
 784                         "notification for %s:\n",
 785                         le32_to_cpu(pkt->len), get_cmd_string(pkt->hdr.cmd));
 786         iwl_print_hex_dump(priv, IWL_DL_RADIO, pkt->u.raw, le32_to_cpu(pkt->len));
 787 }
 788
 789 static void iwl_bg_beacon_update(struct work_struct *work)
 790 {
 791         struct iwl_priv *priv =
 792                 container_of(work, struct iwl_priv, beacon_update);
 793         struct sk_buff *beacon;
 794
 795         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
 796         beacon = ieee80211_beacon_get(priv->hw, priv->vif);
 797
 798         if (!beacon) {
 799                 IWL_ERR(priv, "update beacon failed\n");
 800                 return;
 801         }
 802
 803         mutex_lock(&priv->mutex);
 804         /* new beacon skb is allocated every time; dispose previous.*/
 805         if (priv->ibss_beacon)
 806                 dev_kfree_skb(priv->ibss_beacon);
 807
 808         priv->ibss_beacon = beacon;
 809         mutex_unlock(&priv->mutex);
 810
 811         iwl_send_beacon_cmd(priv);
 812 }
 813
 814 /**
 815  * iwl_bg_statistics_periodic - Timer callback to queue statistics
 816  *
 817  * This callback is provided in order to send a statistics request.
 818  *
 819  * This timer function is continually reset to execute within
 820  * REG_RECALIB_PERIOD seconds since the last STATISTICS_NOTIFICATION
 821  * was received.  We need to ensure we receive the statistics in order
 822  * to update the temperature used for calibrating the TXPOWER.
 823  */
 824 static void iwl_bg_statistics_periodic(unsigned long data)
 825 {
 826         struct iwl_priv *priv = (struct iwl_priv *)data;
 827
 828         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 829                 return;
 830
 831         /* dont send host command if rf-kill is on */
 832         if (!iwl_is_ready_rf(priv))
 833                 return;
 834
 835         iwl_send_statistics_request(priv, CMD_ASYNC);
 836 }
 837
 838 static void iwl_rx_beacon_notif(struct iwl_priv *priv,
 839                                 struct iwl_rx_mem_buffer *rxb)
 840 {
 841 #ifdef CONFIG_IWLWIFI_DEBUG
 842         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
 843         struct iwl4965_beacon_notif *beacon =
 844                 (struct iwl4965_beacon_notif *)pkt->u.raw;
 845         u8 rate = iwl_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
 846
 847         IWL_DEBUG_RX(priv, "beacon status %x retries %d iss %d "
 848                 "tsf %d %d rate %d\n",
 849                 le32_to_cpu(beacon->beacon_notify_hdr.u.status) & TX_STATUS_MSK,
 850                 beacon->beacon_notify_hdr.failure_frame,
 851                 le32_to_cpu(beacon->ibss_mgr_status),
 852                 le32_to_cpu(beacon->high_tsf),
 853                 le32_to_cpu(beacon->low_tsf), rate);
 854 #endif
 855
 856         if ((priv->iw_mode == NL80211_IFTYPE_AP) &&
 857             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
 858                 queue_work(priv->workqueue, &priv->beacon_update);
 859 }
 860
 861 /* Handle notification from uCode that card's power state is changing
 862  * due to software, hardware, or critical temperature RFKILL */
 863 static void iwl_rx_card_state_notif(struct iwl_priv *priv,
 864                                     struct iwl_rx_mem_buffer *rxb)
 865 {
 866         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
 867         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
 868         unsigned long status = priv->status;
 869
 870         IWL_DEBUG_RF_KILL(priv, "Card state received: HW:%s SW:%s\n",
 871                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
 872                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
 873
 874         if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED |
 875                      RF_CARD_DISABLED)) {
 876
 877                 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
 878                             CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
 879
 880                 if (!iwl_grab_nic_access(priv)) {
 881                         iwl_write_direct32(
 882                                 priv, HBUS_TARG_MBX_C,
 883                                 HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
 884
 885                         iwl_release_nic_access(priv);
 886                 }
 887
 888                 if (!(flags & RXON_CARD_DISABLED)) {
 889                         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
 890                                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
 891                         if (!iwl_grab_nic_access(priv)) {
 892                                 iwl_write_direct32(
 893                                         priv, HBUS_TARG_MBX_C,
 894                                         HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
 895
 896                                 iwl_release_nic_access(priv);
 897                         }
 898                 }
 899
 900                 if (flags & RF_CARD_DISABLED) {
 901                         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
 902                                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
 903                         iwl_read32(priv, CSR_UCODE_DRV_GP1);
 904                         if (!iwl_grab_nic_access(priv))
 905                                 iwl_release_nic_access(priv);
 906                 }
 907         }
 908
 909         if (flags & HW_CARD_DISABLED)
 910                 set_bit(STATUS_RF_KILL_HW, &priv->status);
 911         else
 912                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
 913
 914
 915         if (flags & SW_CARD_DISABLED)
 916                 set_bit(STATUS_RF_KILL_SW, &priv->status);
 917         else
 918                 clear_bit(STATUS_RF_KILL_SW, &priv->status);
 919
 920         if (!(flags & RXON_CARD_DISABLED))
 921                 iwl_scan_cancel(priv);
 922
 923         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
 924              test_bit(STATUS_RF_KILL_HW, &priv->status)) ||
 925             (test_bit(STATUS_RF_KILL_SW, &status) !=
 926              test_bit(STATUS_RF_KILL_SW, &priv->status)))
 927                 queue_work(priv->workqueue, &priv->rf_kill);
 928         else
 929                 wake_up_interruptible(&priv->wait_command_queue);
 930 }
 931
 932 int iwl_set_pwr_src(struct iwl_priv *priv, enum iwl_pwr_src src)
 933 {
 934         int ret;
 935         unsigned long flags;
 936
 937         spin_lock_irqsave(&priv->lock, flags);
 938         ret = iwl_grab_nic_access(priv);
 939         if (ret)
 940                 goto err;
 941
 942         if (src == IWL_PWR_SRC_VAUX) {
 943                 u32 val;
 944                 ret = pci_read_config_dword(priv->pci_dev, PCI_CFG_POWER_SOURCE,
 945                                             &val);
 946
 947                 if (val & PCI_CFG_PMC_PME_FROM_D3COLD_SUPPORT)
 948                         iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
 949                                                APMG_PS_CTRL_VAL_PWR_SRC_VAUX,
 950                                                ~APMG_PS_CTRL_MSK_PWR_SRC);
 951         } else {
 952                 iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
 953                                        APMG_PS_CTRL_VAL_PWR_SRC_VMAIN,
 954                                        ~APMG_PS_CTRL_MSK_PWR_SRC);
 955         }
 956
 957         iwl_release_nic_access(priv);
 958 err:
 959         spin_unlock_irqrestore(&priv->lock, flags);
 960         return ret;
 961 }
 962
 963 /**
 964  * iwl_setup_rx_handlers - Initialize Rx handler callbacks
 965  *
 966  * Setup the RX handlers for each of the reply types sent from the uCode
 967  * to the host.
 968  *
 969  * This function chains into the hardware specific files for them to setup
 970  * any hardware specific handlers as well.
 971  */
 972 static void iwl_setup_rx_handlers(struct iwl_priv *priv)
 973 {
 974         priv->rx_handlers[REPLY_ALIVE] = iwl_rx_reply_alive;
 975         priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error;
 976         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
 977         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif;
 978         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
 979             iwl_rx_pm_debug_statistics_notif;
 980         priv->rx_handlers[BEACON_NOTIFICATION] = iwl_rx_beacon_notif;
 981
 982         /*
 983          * The same handler is used for both the REPLY to a discrete
 984          * statistics request from the host as well as for the periodic
 985          * statistics notifications (after received beacons) from the uCode.
 986          */
 987         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl_rx_statistics;
 988         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl_rx_statistics;
 989
 990         iwl_setup_spectrum_handlers(priv);
 991         iwl_setup_rx_scan_handlers(priv);
 992
 993         /* status change handler */
 994         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl_rx_card_state_notif;
 995
 996         priv->rx_handlers[MISSED_BEACONS_NOTIFICATION] =
 997             iwl_rx_missed_beacon_notif;
 998         /* Rx handlers */
 999         priv->rx_handlers[REPLY_RX_PHY_CMD] = iwl_rx_reply_rx_phy;
1000         priv->rx_handlers[REPLY_RX_MPDU_CMD] = iwl_rx_reply_rx;
1001         /* block ack */
1002         priv->rx_handlers[REPLY_COMPRESSED_BA] = iwl_rx_reply_compressed_ba;
1003         /* Set up hardware specific Rx handlers */
1004         priv->cfg->ops->lib->rx_handler_setup(priv);
1005 }
1006
1007 /**
1008  * iwl_rx_handle - Main entry function for receiving responses from uCode
1009  *
1010  * Uses the priv->rx_handlers callback function array to invoke
1011  * the appropriate handlers, including command responses,
1012  * frame-received notifications, and other notifications.
1013  */
1014 void iwl_rx_handle(struct iwl_priv *priv)
1015 {
1016         struct iwl_rx_mem_buffer *rxb;
1017         struct iwl_rx_packet *pkt;
1018         struct iwl_rx_queue *rxq = &priv->rxq;
1019         u32 r, i;
1020         int reclaim;
1021         unsigned long flags;
1022         u8 fill_rx = 0;
1023         u32 count = 8;
1024
1025         /* uCode's read index (stored in shared DRAM) indicates the last Rx
1026          * buffer that the driver may process (last buffer filled by ucode). */
1027         r = le16_to_cpu(rxq->rb_stts->closed_rb_num) &  0x0FFF;
1028         i = rxq->read;
1029
1030         /* Rx interrupt, but nothing sent from uCode */
1031         if (i == r)
1032                 IWL_DEBUG_RX(priv, "r = %d, i = %d\n", r, i);
1033
1034         if (iwl_rx_queue_space(rxq) > (RX_QUEUE_SIZE / 2))
1035                 fill_rx = 1;
1036
1037         while (i != r) {
1038                 rxb = rxq->queue[i];
1039
1040                 /* If an RXB doesn't have a Rx queue slot associated with it,
1041                  * then a bug has been introduced in the queue refilling
1042                  * routines -- catch it here */
1043                 BUG_ON(rxb == NULL);
1044
1045                 rxq->queue[i] = NULL;
1046
1047                 dma_sync_single_range_for_cpu(
1048                                 &priv->pci_dev->dev, rxb->real_dma_addr,
1049                                 rxb->aligned_dma_addr - rxb->real_dma_addr,
1050                                 priv->hw_params.rx_buf_size,
1051                                 PCI_DMA_FROMDEVICE);
1052                 pkt = (struct iwl_rx_packet *)rxb->skb->data;
1053
1054                 /* Reclaim a command buffer only if this packet is a response
1055                  *   to a (driver-originated) command.
1056                  * If the packet (e.g. Rx frame) originated from uCode,
1057                  *   there is no command buffer to reclaim.
1058                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
1059                  *   but apparently a few don't get set; catch them here. */
1060                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
1061                         (pkt->hdr.cmd != REPLY_RX_PHY_CMD) &&
1062                         (pkt->hdr.cmd != REPLY_RX) &&
1063                         (pkt->hdr.cmd != REPLY_RX_MPDU_CMD) &&
1064                         (pkt->hdr.cmd != REPLY_COMPRESSED_BA) &&
1065                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
1066                         (pkt->hdr.cmd != REPLY_TX);
1067
1068                 /* Based on type of command response or notification,
1069                  *   handle those that need handling via function in
1070                  *   rx_handlers table.  See iwl_setup_rx_handlers() */
1071                 if (priv->rx_handlers[pkt->hdr.cmd]) {
1072                         IWL_DEBUG_RX(priv, "r = %d, i = %d, %s, 0x%02x\n", r,
1073                                 i, get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
1074                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
1075                 } else {
1076                         /* No handling needed */
1077                         IWL_DEBUG_RX(priv,
1078                                 "r %d i %d No handler needed for %s, 0x%02x\n",
1079                                 r, i, get_cmd_string(pkt->hdr.cmd),
1080                                 pkt->hdr.cmd);
1081                 }
1082
1083                 if (reclaim) {
1084                         /* Invoke any callbacks, transfer the skb to caller, and
1085                          * fire off the (possibly) blocking iwl_send_cmd()
1086                          * as we reclaim the driver command queue */
1087                         if (rxb && rxb->skb)
1088                                 iwl_tx_cmd_complete(priv, rxb);
1089                         else
1090                                 IWL_WARN(priv, "Claim null rxb?\n");
1091                 }
1092
1093                 /* For now we just don't re-use anything.  We can tweak this
1094                  * later to try and re-use notification packets and SKBs that
1095                  * fail to Rx correctly */
1096                 if (rxb->skb != NULL) {
1097                         priv->alloc_rxb_skb--;
1098                         dev_kfree_skb_any(rxb->skb);
1099                         rxb->skb = NULL;
1100                 }
1101
1102                 pci_unmap_single(priv->pci_dev, rxb->real_dma_addr,
1103                                  priv->hw_params.rx_buf_size + 256,
1104                                  PCI_DMA_FROMDEVICE);
1105                 spin_lock_irqsave(&rxq->lock, flags);
1106                 list_add_tail(&rxb->list, &priv->rxq.rx_used);
1107                 spin_unlock_irqrestore(&rxq->lock, flags);
1108                 i = (i + 1) & RX_QUEUE_MASK;
1109                 /* If there are a lot of unused frames,
1110                  * restock the Rx queue so ucode wont assert. */
1111                 if (fill_rx) {
1112                         count++;
1113                         if (count >= 8) {
1114                                 priv->rxq.read = i;
1115                                 iwl_rx_queue_restock(priv);
1116                                 count = 0;
1117                         }
1118                 }
1119         }
1120
1121         /* Backtrack one entry */
1122         priv->rxq.read = i;
1123         iwl_rx_queue_restock(priv);
1124 }
1125
1126 /* call this function to flush any scheduled tasklet */
1127 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
1128 {
1129         /* wait to make sure we flush pending tasklet*/
1130         synchronize_irq(priv->pci_dev->irq);
1131         tasklet_kill(&priv->irq_tasklet);
1132 }
1133
1134 static void iwl_error_recovery(struct iwl_priv *priv)
1135 {
1136         unsigned long flags;
1137
1138         memcpy(&priv->staging_rxon, &priv->recovery_rxon,
1139                sizeof(priv->staging_rxon));
1140         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1141         iwl_commit_rxon(priv);
1142
1143         iwl_rxon_add_station(priv, priv->bssid, 1);
1144
1145         spin_lock_irqsave(&priv->lock, flags);
1146         priv->assoc_id = le16_to_cpu(priv->staging_rxon.assoc_id);
1147         priv->error_recovering = 0;
1148         spin_unlock_irqrestore(&priv->lock, flags);
1149 }
1150
1151 static void iwl_irq_tasklet(struct iwl_priv *priv)
1152 {
1153         u32 inta, handled = 0;
1154         u32 inta_fh;
1155         unsigned long flags;
1156 #ifdef CONFIG_IWLWIFI_DEBUG
1157         u32 inta_mask;
1158 #endif
1159
1160         spin_lock_irqsave(&priv->lock, flags);
1161
1162         /* Ack/clear/reset pending uCode interrupts.
1163          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
1164          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
1165         inta = iwl_read32(priv, CSR_INT);
1166         iwl_write32(priv, CSR_INT, inta);
1167
1168         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
1169          * Any new interrupts that happen after this, either while we're
1170          * in this tasklet, or later, will show up in next ISR/tasklet. */
1171         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1172         iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
1173
1174 #ifdef CONFIG_IWLWIFI_DEBUG
1175         if (priv->debug_level & IWL_DL_ISR) {
1176                 /* just for debug */
1177                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1178                 IWL_DEBUG_ISR(priv, "inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1179                               inta, inta_mask, inta_fh);
1180         }
1181 #endif
1182
1183         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
1184          * atomic, make sure that inta covers all the interrupts that
1185          * we've discovered, even if FH interrupt came in just after
1186          * reading CSR_INT. */
1187         if (inta_fh & CSR49_FH_INT_RX_MASK)
1188                 inta |= CSR_INT_BIT_FH_RX;
1189         if (inta_fh & CSR49_FH_INT_TX_MASK)
1190                 inta |= CSR_INT_BIT_FH_TX;
1191
1192         /* Now service all interrupt bits discovered above. */
1193         if (inta & CSR_INT_BIT_HW_ERR) {
1194                 IWL_ERR(priv, "Microcode HW error detected.  Restarting.\n");
1195
1196                 /* Tell the device to stop sending interrupts */
1197                 iwl_disable_interrupts(priv);
1198
1199                 iwl_irq_handle_error(priv);
1200
1201                 handled |= CSR_INT_BIT_HW_ERR;
1202
1203                 spin_unlock_irqrestore(&priv->lock, flags);
1204
1205                 return;
1206         }
1207
1208 #ifdef CONFIG_IWLWIFI_DEBUG
1209         if (priv->debug_level & (IWL_DL_ISR)) {
1210                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1211                 if (inta & CSR_INT_BIT_SCD)
1212                         IWL_DEBUG_ISR(priv, "Scheduler finished to transmit "
1213                                       "the frame/frames.\n");
1214
1215                 /* Alive notification via Rx interrupt will do the real work */
1216                 if (inta & CSR_INT_BIT_ALIVE)
1217                         IWL_DEBUG_ISR(priv, "Alive interrupt\n");
1218         }
1219 #endif
1220         /* Safely ignore these bits for debug checks below */
1221         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1222
1223         /* HW RF KILL switch toggled */
1224         if (inta & CSR_INT_BIT_RF_KILL) {
1225                 int hw_rf_kill = 0;
1226                 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
1227                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
1228                         hw_rf_kill = 1;
1229
1230                 IWL_DEBUG_RF_KILL(priv, "RF_KILL bit toggled to %s.\n",
1231                                 hw_rf_kill ? "disable radio" : "enable radio");
1232
1233                 /* driver only loads ucode once setting the interface up.
1234                  * the driver allows loading the ucode even if the radio
1235                  * is killed. Hence update the killswitch state here. The
1236                  * rfkill handler will care about restarting if needed.
1237                  */
1238                 if (!test_bit(STATUS_ALIVE, &priv->status)) {
1239                         if (hw_rf_kill)
1240                                 set_bit(STATUS_RF_KILL_HW, &priv->status);
1241                         else
1242                                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
1243                         queue_work(priv->workqueue, &priv->rf_kill);
1244                 }
1245
1246                 handled |= CSR_INT_BIT_RF_KILL;
1247         }
1248
1249         /* Chip got too hot and stopped itself */
1250         if (inta & CSR_INT_BIT_CT_KILL) {
1251                 IWL_ERR(priv, "Microcode CT kill error detected.\n");
1252                 handled |= CSR_INT_BIT_CT_KILL;
1253         }
1254
1255         /* Error detected by uCode */
1256         if (inta & CSR_INT_BIT_SW_ERR) {
1257                 IWL_ERR(priv, "Microcode SW error detected. "
1258                         " Restarting 0x%X.\n", inta);
1259                 iwl_irq_handle_error(priv);
1260                 handled |= CSR_INT_BIT_SW_ERR;
1261         }
1262
1263         /* uCode wakes up after power-down sleep */
1264         if (inta & CSR_INT_BIT_WAKEUP) {
1265                 IWL_DEBUG_ISR(priv, "Wakeup interrupt\n");
1266                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
1267                 iwl_txq_update_write_ptr(priv, &priv->txq[0]);
1268                 iwl_txq_update_write_ptr(priv, &priv->txq[1]);
1269                 iwl_txq_update_write_ptr(priv, &priv->txq[2]);
1270                 iwl_txq_update_write_ptr(priv, &priv->txq[3]);
1271                 iwl_txq_update_write_ptr(priv, &priv->txq[4]);
1272                 iwl_txq_update_write_ptr(priv, &priv->txq[5]);
1273
1274                 handled |= CSR_INT_BIT_WAKEUP;
1275         }
1276
1277         /* All uCode command responses, including Tx command responses,
1278          * Rx "responses" (frame-received notification), and other
1279          * notifications from uCode come through here*/
1280         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1281                 iwl_rx_handle(priv);
1282                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1283         }
1284
1285         if (inta & CSR_INT_BIT_FH_TX) {
1286                 IWL_DEBUG_ISR(priv, "Tx interrupt\n");
1287                 handled |= CSR_INT_BIT_FH_TX;
1288                 /* FH finished to write, send event */
1289                 priv->ucode_write_complete = 1;
1290                 wake_up_interruptible(&priv->wait_command_queue);
1291         }
1292
1293         if (inta & ~handled)
1294                 IWL_ERR(priv, "Unhandled INTA bits 0x%08x\n", inta & ~handled);
1295
1296         if (inta & ~CSR_INI_SET_MASK) {
1297                 IWL_WARN(priv, "Disabled INTA bits 0x%08x were pending\n",
1298                          inta & ~CSR_INI_SET_MASK);
1299                 IWL_WARN(priv, "   with FH_INT = 0x%08x\n", inta_fh);
1300         }
1301
1302         /* Re-enable all interrupts */
1303         /* only Re-enable if diabled by irq */
1304         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1305                 iwl_enable_interrupts(priv);
1306
1307 #ifdef CONFIG_IWLWIFI_DEBUG
1308         if (priv->debug_level & (IWL_DL_ISR)) {
1309                 inta = iwl_read32(priv, CSR_INT);
1310                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1311                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1312                 IWL_DEBUG_ISR(priv, "End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
1313                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
1314         }
1315 #endif
1316         spin_unlock_irqrestore(&priv->lock, flags);
1317 }
1318
1319 static irqreturn_t iwl_isr(int irq, void *data)
1320 {
1321         struct iwl_priv *priv = data;
1322         u32 inta, inta_mask;
1323         u32 inta_fh;
1324         if (!priv)
1325                 return IRQ_NONE;
1326
1327         spin_lock(&priv->lock);
1328
1329         /* Disable (but don't clear!) interrupts here to avoid
1330          *    back-to-back ISRs and sporadic interrupts from our NIC.
1331          * If we have something to service, the tasklet will re-enable ints.
1332          * If we *don't* have something, we'll re-enable before leaving here. */
1333         inta_mask = iwl_read32(priv, CSR_INT_MASK);  /* just for debug */
1334         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
1335
1336         /* Discover which interrupts are active/pending */
1337         inta = iwl_read32(priv, CSR_INT);
1338         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1339
1340         /* Ignore interrupt if there's nothing in NIC to service.
1341          * This may be due to IRQ shared with another device,
1342          * or due to sporadic interrupts thrown from our NIC. */
1343         if (!inta && !inta_fh) {
1344                 IWL_DEBUG_ISR(priv, "Ignore interrupt, inta == 0, inta_fh == 0\n");
1345                 goto none;
1346         }
1347
1348         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
1349                 /* Hardware disappeared. It might have already raised
1350                  * an interrupt */
1351                 IWL_WARN(priv, "HARDWARE GONE?? INTA == 0x%08x\n", inta);
1352                 goto unplugged;
1353         }
1354
1355         IWL_DEBUG_ISR(priv, "ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1356                       inta, inta_mask, inta_fh);
1357
1358         inta &= ~CSR_INT_BIT_SCD;
1359
1360         /* iwl_irq_tasklet() will service interrupts and re-enable them */
1361         if (likely(inta || inta_fh))
1362                 tasklet_schedule(&priv->irq_tasklet);
1363
1364  unplugged:
1365         spin_unlock(&priv->lock);
1366         return IRQ_HANDLED;
1367
1368  none:
1369         /* re-enable interrupts here since we don't have anything to service. */
1370         /* only Re-enable if diabled by irq */
1371         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1372                 iwl_enable_interrupts(priv);
1373         spin_unlock(&priv->lock);
1374         return IRQ_NONE;
1375 }
1376
1377 /******************************************************************************
1378  *
1379  * uCode download functions
1380  *
1381  ******************************************************************************/
1382
1383 static void iwl_dealloc_ucode_pci(struct iwl_priv *priv)
1384 {
1385         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
1386         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
1387         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1388         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
1389         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1390         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
1391 }
1392
1393 static void iwl_nic_start(struct iwl_priv *priv)
1394 {
1395         /* Remove all resets to allow NIC to operate */
1396         iwl_write32(priv, CSR_RESET, 0);
1397 }
1398
1399
1400 /**
1401  * iwl_read_ucode - Read uCode images from disk file.
1402  *
1403  * Copy into buffers for card to fetch via bus-mastering
1404  */
1405 static int iwl_read_ucode(struct iwl_priv *priv)
1406 {
1407         struct iwl_ucode *ucode;
1408         int ret = -EINVAL, index;
1409         const struct firmware *ucode_raw;
1410         const char *name_pre = priv->cfg->fw_name_pre;
1411         const unsigned int api_max = priv->cfg->ucode_api_max;
1412         const unsigned int api_min = priv->cfg->ucode_api_min;
1413         char buf[25];
1414         u8 *src;
1415         size_t len;
1416         u32 api_ver, inst_size, data_size, init_size, init_data_size, boot_size;
1417
1418         /* Ask kernel firmware_class module to get the boot firmware off disk.
1419          * request_firmware() is synchronous, file is in memory on return. */
1420         for (index = api_max; index >= api_min; index--) {
1421                 sprintf(buf, "%s%d%s", name_pre, index, ".ucode");
1422                 ret = request_firmware(&ucode_raw, buf, &priv->pci_dev->dev);
1423                 if (ret < 0) {
1424                         IWL_ERR(priv, "%s firmware file req failed: %d\n",
1425                                   buf, ret);
1426                         if (ret == -ENOENT)
1427                                 continue;
1428                         else
1429                                 goto error;
1430                 } else {
1431                         if (index < api_max)
1432                                 IWL_ERR(priv, "Loaded firmware %s, "
1433                                         "which is deprecated. "
1434                                         "Please use API v%u instead.\n",
1435                                           buf, api_max);
1436
1437                         IWL_DEBUG_INFO(priv, "Got firmware '%s' file (%zd bytes) from disk\n",
1438                                        buf, ucode_raw->size);
1439                         break;
1440                 }
1441         }
1442
1443         if (ret < 0)
1444                 goto error;
1445
1446         /* Make sure that we got at least our header! */
1447         if (ucode_raw->size < sizeof(*ucode)) {
1448                 IWL_ERR(priv, "File size way too small!\n");
1449                 ret = -EINVAL;
1450                 goto err_release;
1451         }
1452
1453         /* Data from ucode file:  header followed by uCode images */
1454         ucode = (void *)ucode_raw->data;
1455
1456         priv->ucode_ver = le32_to_cpu(ucode->ver);
1457         api_ver = IWL_UCODE_API(priv->ucode_ver);
1458         inst_size = le32_to_cpu(ucode->inst_size);
1459         data_size = le32_to_cpu(ucode->data_size);
1460         init_size = le32_to_cpu(ucode->init_size);
1461         init_data_size = le32_to_cpu(ucode->init_data_size);
1462         boot_size = le32_to_cpu(ucode->boot_size);
1463
1464         /* api_ver should match the api version forming part of the
1465          * firmware filename ... but we don't check for that and only rely
1466          * on the API version read from firware header from here on forward */
1467
1468         if (api_ver < api_min || api_ver > api_max) {
1469                 IWL_ERR(priv, "Driver unable to support your firmware API. "
1470                           "Driver supports v%u, firmware is v%u.\n",
1471                           api_max, api_ver);
1472                 priv->ucode_ver = 0;
1473                 ret = -EINVAL;
1474                 goto err_release;
1475         }
1476         if (api_ver != api_max)
1477                 IWL_ERR(priv, "Firmware has old API version. Expected v%u, "
1478                           "got v%u. New firmware can be obtained "
1479                           "from http://www.intellinuxwireless.org.\n",
1480                           api_max, api_ver);
1481
1482         IWL_INFO(priv, "loaded firmware version %u.%u.%u.%u\n",
1483                IWL_UCODE_MAJOR(priv->ucode_ver),
1484                IWL_UCODE_MINOR(priv->ucode_ver),
1485                IWL_UCODE_API(priv->ucode_ver),
1486                IWL_UCODE_SERIAL(priv->ucode_ver));
1487
1488         IWL_DEBUG_INFO(priv, "f/w package hdr ucode version raw = 0x%x\n",
1489                        priv->ucode_ver);
1490         IWL_DEBUG_INFO(priv, "f/w package hdr runtime inst size = %u\n",
1491                        inst_size);
1492         IWL_DEBUG_INFO(priv, "f/w package hdr runtime data size = %u\n",
1493                        data_size);
1494         IWL_DEBUG_INFO(priv, "f/w package hdr init inst size = %u\n",
1495                        init_size);
1496         IWL_DEBUG_INFO(priv, "f/w package hdr init data size = %u\n",
1497                        init_data_size);
1498         IWL_DEBUG_INFO(priv, "f/w package hdr boot inst size = %u\n",
1499                        boot_size);
1500
1501         /* Verify size of file vs. image size info in file's header */
1502         if (ucode_raw->size < sizeof(*ucode) +
1503                 inst_size + data_size + init_size +
1504                 init_data_size + boot_size) {
1505
1506                 IWL_DEBUG_INFO(priv, "uCode file size %d too small\n",
1507                                (int)ucode_raw->size);
1508                 ret = -EINVAL;
1509                 goto err_release;
1510         }
1511
1512         /* Verify that uCode images will fit in card's SRAM */
1513         if (inst_size > priv->hw_params.max_inst_size) {
1514                 IWL_DEBUG_INFO(priv, "uCode instr len %d too large to fit in\n",
1515                                inst_size);
1516                 ret = -EINVAL;
1517                 goto err_release;
1518         }
1519
1520         if (data_size > priv->hw_params.max_data_size) {
1521                 IWL_DEBUG_INFO(priv, "uCode data len %d too large to fit in\n",
1522                                 data_size);
1523                 ret = -EINVAL;
1524                 goto err_release;
1525         }
1526         if (init_size > priv->hw_params.max_inst_size) {
1527                 IWL_INFO(priv, "uCode init instr len %d too large to fit in\n",
1528                         init_size);
1529                 ret = -EINVAL;
1530                 goto err_release;
1531         }
1532         if (init_data_size > priv->hw_params.max_data_size) {
1533                 IWL_INFO(priv, "uCode init data len %d too large to fit in\n",
1534                       init_data_size);
1535                 ret = -EINVAL;
1536                 goto err_release;
1537         }
1538         if (boot_size > priv->hw_params.max_bsm_size) {
1539                 IWL_INFO(priv, "uCode boot instr len %d too large to fit in\n",
1540                         boot_size);
1541                 ret = -EINVAL;
1542                 goto err_release;
1543         }
1544
1545         /* Allocate ucode buffers for card's bus-master loading ... */
1546
1547         /* Runtime instructions and 2 copies of data:
1548          * 1) unmodified from disk
1549          * 2) backup cache for save/restore during power-downs */
1550         priv->ucode_code.len = inst_size;
1551         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
1552
1553         priv->ucode_data.len = data_size;
1554         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
1555
1556         priv->ucode_data_backup.len = data_size;
1557         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1558
1559         if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
1560             !priv->ucode_data_backup.v_addr)
1561                 goto err_pci_alloc;
1562
1563         /* Initialization instructions and data */
1564         if (init_size && init_data_size) {
1565                 priv->ucode_init.len = init_size;
1566                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
1567
1568                 priv->ucode_init_data.len = init_data_size;
1569                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1570
1571                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
1572                         goto err_pci_alloc;
1573         }
1574
1575         /* Bootstrap (instructions only, no data) */
1576         if (boot_size) {
1577                 priv->ucode_boot.len = boot_size;
1578                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
1579
1580                 if (!priv->ucode_boot.v_addr)
1581                         goto err_pci_alloc;
1582         }
1583
1584         /* Copy images into buffers for card's bus-master reads ... */
1585
1586         /* Runtime instructions (first block of data in file) */
1587         src = &ucode->data[0];
1588         len = priv->ucode_code.len;
1589         IWL_DEBUG_INFO(priv, "Copying (but not loading) uCode instr len %Zd\n", len);
1590         memcpy(priv->ucode_code.v_addr, src, len);
1591         IWL_DEBUG_INFO(priv, "uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
1592                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
1593
1594         /* Runtime data (2nd block)
1595          * NOTE:  Copy into backup buffer will be done in iwl_up()  */
1596         src = &ucode->data[inst_size];
1597         len = priv->ucode_data.len;
1598         IWL_DEBUG_INFO(priv, "Copying (but not loading) uCode data len %Zd\n", len);
1599         memcpy(priv->ucode_data.v_addr, src, len);
1600         memcpy(priv->ucode_data_backup.v_addr, src, len);
1601
1602         /* Initialization instructions (3rd block) */
1603         if (init_size) {
1604                 src = &ucode->data[inst_size + data_size];
1605                 len = priv->ucode_init.len;
1606                 IWL_DEBUG_INFO(priv, "Copying (but not loading) init instr len %Zd\n",
1607                                 len);
1608                 memcpy(priv->ucode_init.v_addr, src, len);
1609         }
1610
1611         /* Initialization data (4th block) */
1612         if (init_data_size) {
1613                 src = &ucode->data[inst_size + data_size + init_size];
1614                 len = priv->ucode_init_data.len;
1615                 IWL_DEBUG_INFO(priv, "Copying (but not loading) init data len %Zd\n",
1616                                len);
1617                 memcpy(priv->ucode_init_data.v_addr, src, len);
1618         }
1619
1620         /* Bootstrap instructions (5th block) */
1621         src = &ucode->data[inst_size + data_size + init_size + init_data_size];
1622         len = priv->ucode_boot.len;
1623         IWL_DEBUG_INFO(priv, "Copying (but not loading) boot instr len %Zd\n", len);
1624         memcpy(priv->ucode_boot.v_addr, src, len);
1625
1626         /* We have our copies now, allow OS release its copies */
1627         release_firmware(ucode_raw);
1628         return 0;
1629
1630  err_pci_alloc:
1631         IWL_ERR(priv, "failed to allocate pci memory\n");
1632         ret = -ENOMEM;
1633         iwl_dealloc_ucode_pci(priv);
1634
1635  err_release:
1636         release_firmware(ucode_raw);
1637
1638  error:
1639         return ret;
1640 }
1641
1642 /* temporary */
1643 static int iwl_mac_beacon_update(struct ieee80211_hw *hw,
1644                                  struct sk_buff *skb);
1645
1646 /**
1647  * iwl_alive_start - called after REPLY_ALIVE notification received
1648  *                   from protocol/runtime uCode (initialization uCode's
1649  *                   Alive gets handled by iwl_init_alive_start()).
1650  */
1651 static void iwl_alive_start(struct iwl_priv *priv)
1652 {
1653         int ret = 0;
1654
1655         IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
1656
1657         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
1658                 /* We had an error bringing up the hardware, so take it
1659                  * all the way back down so we can try again */
1660                 IWL_DEBUG_INFO(priv, "Alive failed.\n");
1661                 goto restart;
1662         }
1663
1664         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
1665          * This is a paranoid check, because we would not have gotten the
1666          * "runtime" alive if code weren't properly loaded.  */
1667         if (iwl_verify_ucode(priv)) {
1668                 /* Runtime instruction load was bad;
1669                  * take it all the way back down so we can try again */
1670                 IWL_DEBUG_INFO(priv, "Bad runtime uCode load.\n");
1671                 goto restart;
1672         }
1673
1674         iwl_clear_stations_table(priv);
1675         ret = priv->cfg->ops->lib->alive_notify(priv);
1676         if (ret) {
1677                 IWL_WARN(priv,
1678                         "Could not complete ALIVE transition [ntf]: %d\n", ret);
1679                 goto restart;
1680         }
1681
1682         /* After the ALIVE response, we can send host commands to the uCode */
1683         set_bit(STATUS_ALIVE, &priv->status);
1684
1685         if (iwl_is_rfkill(priv))
1686                 return;
1687
1688         ieee80211_wake_queues(priv->hw);
1689
1690         priv->active_rate = priv->rates_mask;
1691         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
1692
1693         if (iwl_is_associated(priv)) {
1694                 struct iwl_rxon_cmd *active_rxon =
1695                                 (struct iwl_rxon_cmd *)&priv->active_rxon;
1696
1697                 memcpy(&priv->staging_rxon, &priv->active_rxon,
1698                        sizeof(priv->staging_rxon));
1699                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1700         } else {
1701                 /* Initialize our rx_config data */
1702                 iwl_connection_init_rx_config(priv, priv->iw_mode);
1703                 iwl_set_rxon_chain(priv);
1704                 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
1705         }
1706
1707         /* Configure Bluetooth device coexistence support */
1708         iwl_send_bt_config(priv);
1709
1710         iwl_reset_run_time_calib(priv);
1711
1712         /* Configure the adapter for unassociated operation */
1713         iwl_commit_rxon(priv);
1714
1715         /* At this point, the NIC is initialized and operational */
1716         iwl_rf_kill_ct_config(priv);
1717
1718         iwl_leds_register(priv);
1719
1720         IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
1721         set_bit(STATUS_READY, &priv->status);
1722         wake_up_interruptible(&priv->wait_command_queue);
1723
1724         if (priv->error_recovering)
1725                 iwl_error_recovery(priv);
1726
1727         iwl_power_update_mode(priv, 1);
1728
1729         /* reassociate for ADHOC mode */
1730         if (priv->vif && (priv->iw_mode == NL80211_IFTYPE_ADHOC)) {
1731                 struct sk_buff *beacon = ieee80211_beacon_get(priv->hw,
1732                                                                 priv->vif);
1733                 if (beacon)
1734                         iwl_mac_beacon_update(priv->hw, beacon);
1735         }
1736
1737
1738         if (test_and_clear_bit(STATUS_MODE_PENDING, &priv->status))
1739                 iwl_set_mode(priv, priv->iw_mode);
1740
1741         return;
1742
1743  restart:
1744         queue_work(priv->workqueue, &priv->restart);
1745 }
1746
1747 static void iwl_cancel_deferred_work(struct iwl_priv *priv);
1748
1749 static void __iwl_down(struct iwl_priv *priv)
1750 {
1751         unsigned long flags;
1752         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
1753
1754         IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
1755
1756         if (!exit_pending)
1757                 set_bit(STATUS_EXIT_PENDING, &priv->status);
1758
1759         iwl_leds_unregister(priv);
1760
1761         iwl_clear_stations_table(priv);
1762
1763         /* Unblock any waiting calls */
1764         wake_up_interruptible_all(&priv->wait_command_queue);
1765
1766         /* Wipe out the EXIT_PENDING status bit if we are not actually
1767          * exiting the module */
1768         if (!exit_pending)
1769                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
1770
1771         /* stop and reset the on-board processor */
1772         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
1773
1774         /* tell the device to stop sending interrupts */
1775         spin_lock_irqsave(&priv->lock, flags);
1776         iwl_disable_interrupts(priv);
1777         spin_unlock_irqrestore(&priv->lock, flags);
1778         iwl_synchronize_irq(priv);
1779
1780         if (priv->mac80211_registered)
1781                 ieee80211_stop_queues(priv->hw);
1782
1783         /* If we have not previously called iwl_init() then
1784          * clear all bits but the RF Kill and SUSPEND bits and return */
1785         if (!iwl_is_init(priv)) {
1786                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
1787                                         STATUS_RF_KILL_HW |
1788                                test_bit(STATUS_RF_KILL_SW, &priv->status) <<
1789                                         STATUS_RF_KILL_SW |
1790                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
1791                                         STATUS_GEO_CONFIGURED |
1792                                test_bit(STATUS_IN_SUSPEND, &priv->status) <<
1793                                         STATUS_IN_SUSPEND |
1794                                test_bit(STATUS_EXIT_PENDING, &priv->status) <<
1795                                         STATUS_EXIT_PENDING;
1796                 goto exit;
1797         }
1798
1799         /* ...otherwise clear out all the status bits but the RF Kill and
1800          * SUSPEND bits and continue taking the NIC down. */
1801         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
1802                                 STATUS_RF_KILL_HW |
1803                         test_bit(STATUS_RF_KILL_SW, &priv->status) <<
1804                                 STATUS_RF_KILL_SW |
1805                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
1806                                 STATUS_GEO_CONFIGURED |
1807                         test_bit(STATUS_IN_SUSPEND, &priv->status) <<
1808                                 STATUS_IN_SUSPEND |
1809                         test_bit(STATUS_FW_ERROR, &priv->status) <<
1810                                 STATUS_FW_ERROR |
1811                        test_bit(STATUS_EXIT_PENDING, &priv->status) <<
1812                                 STATUS_EXIT_PENDING;
1813
1814         spin_lock_irqsave(&priv->lock, flags);
1815         iwl_clear_bit(priv, CSR_GP_CNTRL,
1816                          CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
1817         spin_unlock_irqrestore(&priv->lock, flags);
1818
1819         iwl_txq_ctx_stop(priv);
1820         iwl_rxq_stop(priv);
1821
1822         spin_lock_irqsave(&priv->lock, flags);
1823         if (!iwl_grab_nic_access(priv)) {
1824                 iwl_write_prph(priv, APMG_CLK_DIS_REG,
1825                                          APMG_CLK_VAL_DMA_CLK_RQT);
1826                 iwl_release_nic_access(priv);
1827         }
1828         spin_unlock_irqrestore(&priv->lock, flags);
1829
1830         udelay(5);
1831
1832         /* FIXME: apm_ops.suspend(priv) */
1833         if (exit_pending || test_bit(STATUS_IN_SUSPEND, &priv->status))
1834                 priv->cfg->ops->lib->apm_ops.stop(priv);
1835         else
1836                 priv->cfg->ops->lib->apm_ops.reset(priv);
1837  exit:
1838         memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
1839
1840         if (priv->ibss_beacon)
1841                 dev_kfree_skb(priv->ibss_beacon);
1842         priv->ibss_beacon = NULL;
1843
1844         /* clear out any free frames */
1845         iwl_clear_free_frames(priv);
1846 }
1847
1848 static void iwl_down(struct iwl_priv *priv)
1849 {
1850         mutex_lock(&priv->mutex);
1851         __iwl_down(priv);
1852         mutex_unlock(&priv->mutex);
1853
1854         iwl_cancel_deferred_work(priv);
1855 }
1856
1857 #define MAX_HW_RESTARTS 5
1858
1859 static int __iwl_up(struct iwl_priv *priv)
1860 {
1861         int i;
1862         int ret;
1863
1864         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1865                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
1866                 return -EIO;
1867         }
1868
1869         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
1870                 IWL_ERR(priv, "ucode not available for device bringup\n");
1871                 return -EIO;
1872         }
1873
1874         /* If platform's RF_KILL switch is NOT set to KILL */
1875         if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
1876                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
1877         else
1878                 set_bit(STATUS_RF_KILL_HW, &priv->status);
1879
1880         if (iwl_is_rfkill(priv)) {
1881                 iwl_enable_interrupts(priv);
1882                 IWL_WARN(priv, "Radio disabled by %s RF Kill switch\n",
1883                     test_bit(STATUS_RF_KILL_HW, &priv->status) ? "HW" : "SW");
1884                 return 0;
1885         }
1886
1887         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
1888
1889         ret = iwl_hw_nic_init(priv);
1890         if (ret) {
1891                 IWL_ERR(priv, "Unable to init nic\n");
1892                 return ret;
1893         }
1894
1895         /* make sure rfkill handshake bits are cleared */
1896         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
1897         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
1898                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
1899
1900         /* clear (again), then enable host interrupts */
1901         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
1902         iwl_enable_interrupts(priv);
1903
1904         /* really make sure rfkill handshake bits are cleared */
1905         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
1906         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
1907
1908         /* Copy original ucode data image from disk into backup cache.
1909          * This will be used to initialize the on-board processor's
1910          * data SRAM for a clean start when the runtime program first loads. */
1911         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
1912                priv->ucode_data.len);
1913
1914         for (i = 0; i < MAX_HW_RESTARTS; i++) {
1915
1916                 iwl_clear_stations_table(priv);
1917
1918                 /* load bootstrap state machine,
1919                  * load bootstrap program into processor's memory,
1920                  * prepare to load the "initialize" uCode */
1921                 ret = priv->cfg->ops->lib->load_ucode(priv);
1922
1923                 if (ret) {
1924                         IWL_ERR(priv, "Unable to set up bootstrap uCode: %d\n",
1925                                 ret);
1926                         continue;
1927                 }
1928
1929                 /* Clear out the uCode error bit if it is set */
1930                 clear_bit(STATUS_FW_ERROR, &priv->status);
1931
1932                 /* start card; "initialize" will load runtime ucode */
1933                 iwl_nic_start(priv);
1934
1935                 IWL_DEBUG_INFO(priv, DRV_NAME " is coming up\n");
1936
1937                 return 0;
1938         }
1939
1940         set_bit(STATUS_EXIT_PENDING, &priv->status);
1941         __iwl_down(priv);
1942         clear_bit(STATUS_EXIT_PENDING, &priv->status);
1943
1944         /* tried to restart and config the device for as long as our
1945          * patience could withstand */
1946         IWL_ERR(priv, "Unable to initialize device after %d attempts.\n", i);
1947         return -EIO;
1948 }
1949
1950
1951 /*****************************************************************************
1952  *
1953  * Workqueue callbacks
1954  *
1955  *****************************************************************************/
1956
1957 static void iwl_bg_init_alive_start(struct work_struct *data)
1958 {
1959         struct iwl_priv *priv =
1960             container_of(data, struct iwl_priv, init_alive_start.work);
1961
1962         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1963                 return;
1964
1965         mutex_lock(&priv->mutex);
1966         priv->cfg->ops->lib->init_alive_start(priv);
1967         mutex_unlock(&priv->mutex);
1968 }
1969
1970 static void iwl_bg_alive_start(struct work_struct *data)
1971 {
1972         struct iwl_priv *priv =
1973             container_of(data, struct iwl_priv, alive_start.work);
1974
1975         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1976                 return;
1977
1978         mutex_lock(&priv->mutex);
1979         iwl_alive_start(priv);
1980         mutex_unlock(&priv->mutex);
1981 }
1982
1983 static void iwl_bg_run_time_calib_work(struct work_struct *work)
1984 {
1985         struct iwl_priv *priv = container_of(work, struct iwl_priv,
1986                         run_time_calib_work);
1987
1988         mutex_lock(&priv->mutex);
1989
1990         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
1991             test_bit(STATUS_SCANNING, &priv->status)) {
1992                 mutex_unlock(&priv->mutex);
1993                 return;
1994         }
1995
1996         if (priv->start_calib) {
1997                 iwl_chain_noise_calibration(priv, &priv->statistics);
1998
1999                 iwl_sensitivity_calibration(priv, &priv->statistics);
2000         }
2001
2002         mutex_unlock(&priv->mutex);
2003         return;
2004 }
2005
2006 static void iwl_bg_up(struct work_struct *data)
2007 {
2008         struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
2009
2010         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2011                 return;
2012
2013         mutex_lock(&priv->mutex);
2014         __iwl_up(priv);
2015         mutex_unlock(&priv->mutex);
2016         iwl_rfkill_set_hw_state(priv);
2017 }
2018
2019 static void iwl_bg_restart(struct work_struct *data)
2020 {
2021         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
2022
2023         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2024                 return;
2025
2026         iwl_down(priv);
2027         queue_work(priv->workqueue, &priv->up);
2028 }
2029
2030 static void iwl_bg_rx_replenish(struct work_struct *data)
2031 {
2032         struct iwl_priv *priv =
2033             container_of(data, struct iwl_priv, rx_replenish);
2034
2035         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2036                 return;
2037
2038         mutex_lock(&priv->mutex);
2039         iwl_rx_replenish(priv);
2040         mutex_unlock(&priv->mutex);
2041 }
2042
2043 #define IWL_DELAY_NEXT_SCAN (HZ*2)
2044
2045 static void iwl_post_associate(struct iwl_priv *priv)
2046 {
2047         struct ieee80211_conf *conf = NULL;
2048         int ret = 0;
2049         unsigned long flags;
2050
2051         if (priv->iw_mode == NL80211_IFTYPE_AP) {
2052                 IWL_ERR(priv, "%s Should not be called in AP mode\n", __func__);
2053                 return;
2054         }
2055
2056         IWL_DEBUG_ASSOC(priv, "Associated as %d to: %pM\n",
2057                         priv->assoc_id, priv->active_rxon.bssid_addr);
2058
2059
2060         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2061                 return;
2062
2063
2064         if (!priv->vif || !priv->is_open)
2065                 return;
2066
2067         iwl_power_cancel_timeout(priv);
2068         iwl_scan_cancel_timeout(priv, 200);
2069
2070         conf = ieee80211_get_hw_conf(priv->hw);
2071
2072         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2073         iwl_commit_rxon(priv);
2074
2075         iwl_setup_rxon_timing(priv);
2076         ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
2077                               sizeof(priv->rxon_timing), &priv->rxon_timing);
2078         if (ret)
2079                 IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
2080                             "Attempting to continue.\n");
2081
2082         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2083
2084         iwl_set_rxon_ht(priv, &priv->current_ht_config);
2085
2086         iwl_set_rxon_chain(priv);
2087         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
2088
2089         IWL_DEBUG_ASSOC(priv, "assoc id %d beacon interval %d\n",
2090                         priv->assoc_id, priv->beacon_int);
2091
2092         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
2093                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2094         else
2095                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2096
2097         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
2098                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
2099                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2100                 else
2101                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2102
2103                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
2104                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2105
2106         }
2107
2108         iwl_commit_rxon(priv);
2109
2110         switch (priv->iw_mode) {
2111         case NL80211_IFTYPE_STATION:
2112                 break;
2113
2114         case NL80211_IFTYPE_ADHOC:
2115
2116                 /* assume default assoc id */
2117                 priv->assoc_id = 1;
2118
2119                 iwl_rxon_add_station(priv, priv->bssid, 0);
2120                 iwl_send_beacon_cmd(priv);
2121
2122                 break;
2123
2124         default:
2125                 IWL_ERR(priv, "%s Should not be called in %d mode\n",
2126                           __func__, priv->iw_mode);
2127                 break;
2128         }
2129
2130         if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
2131                 priv->assoc_station_added = 1;
2132
2133         spin_lock_irqsave(&priv->lock, flags);
2134         iwl_activate_qos(priv, 0);
2135         spin_unlock_irqrestore(&priv->lock, flags);
2136
2137         /* the chain noise calibration will enabled PM upon completion
2138          * If chain noise has already been run, then we need to enable
2139          * power management here */
2140         if (priv->chain_noise_data.state == IWL_CHAIN_NOISE_DONE)
2141                 iwl_power_enable_management(priv);
2142
2143         /* Enable Rx differential gain and sensitivity calibrations */
2144         iwl_chain_noise_reset(priv);
2145         priv->start_calib = 1;
2146
2147 }
2148
2149 /*****************************************************************************
2150  *
2151  * mac80211 entry point functions
2152  *
2153  *****************************************************************************/
2154
2155 #define UCODE_READY_TIMEOUT     (4 * HZ)
2156
2157 static int iwl_mac_start(struct ieee80211_hw *hw)
2158 {
2159         struct iwl_priv *priv = hw->priv;
2160         int ret;
2161
2162         IWL_DEBUG_MAC80211(priv, "enter\n");
2163
2164         /* we should be verifying the device is ready to be opened */
2165         mutex_lock(&priv->mutex);
2166
2167         memset(&priv->staging_rxon, 0, sizeof(struct iwl_rxon_cmd));
2168         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
2169          * ucode filename and max sizes are card-specific. */
2170
2171         if (!priv->ucode_code.len) {
2172                 ret = iwl_read_ucode(priv);
2173                 if (ret) {
2174                         IWL_ERR(priv, "Could not read microcode: %d\n", ret);
2175                         mutex_unlock(&priv->mutex);
2176                         return ret;
2177                 }
2178         }
2179
2180         ret = __iwl_up(priv);
2181
2182         mutex_unlock(&priv->mutex);
2183
2184         iwl_rfkill_set_hw_state(priv);
2185
2186         if (ret)
2187                 return ret;
2188
2189         if (iwl_is_rfkill(priv))
2190                 goto out;
2191
2192         IWL_DEBUG_INFO(priv, "Start UP work done.\n");
2193
2194         if (test_bit(STATUS_IN_SUSPEND, &priv->status))
2195                 return 0;
2196
2197         /* Wait for START_ALIVE from Run Time ucode. Otherwise callbacks from
2198          * mac80211 will not be run successfully. */
2199         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
2200                         test_bit(STATUS_READY, &priv->status),
2201                         UCODE_READY_TIMEOUT);
2202         if (!ret) {
2203                 if (!test_bit(STATUS_READY, &priv->status)) {
2204                         IWL_ERR(priv, "START_ALIVE timeout after %dms.\n",
2205                                 jiffies_to_msecs(UCODE_READY_TIMEOUT));
2206                         return -ETIMEDOUT;
2207                 }
2208         }
2209
2210 out:
2211         priv->is_open = 1;
2212         IWL_DEBUG_MAC80211(priv, "leave\n");
2213         return 0;
2214 }
2215
2216 static void iwl_mac_stop(struct ieee80211_hw *hw)
2217 {
2218         struct iwl_priv *priv = hw->priv;
2219
2220         IWL_DEBUG_MAC80211(priv, "enter\n");
2221
2222         if (!priv->is_open) {
2223                 IWL_DEBUG_MAC80211(priv, "leave - skip\n");
2224                 return;
2225         }
2226
2227         priv->is_open = 0;
2228
2229         if (iwl_is_ready_rf(priv)) {
2230                 /* stop mac, cancel any scan request and clear
2231                  * RXON_FILTER_ASSOC_MSK BIT
2232                  */
2233                 mutex_lock(&priv->mutex);
2234                 iwl_scan_cancel_timeout(priv, 100);
2235                 mutex_unlock(&priv->mutex);
2236         }
2237
2238         iwl_down(priv);
2239
2240         flush_workqueue(priv->workqueue);
2241
2242         /* enable interrupts again in order to receive rfkill changes */
2243         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2244         iwl_enable_interrupts(priv);
2245
2246         IWL_DEBUG_MAC80211(priv, "leave\n");
2247 }
2248
2249 static int iwl_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
2250 {
2251         struct iwl_priv *priv = hw->priv;
2252
2253         IWL_DEBUG_MACDUMP(priv, "enter\n");
2254
2255         IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
2256                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
2257
2258         if (iwl_tx_skb(priv, skb))
2259                 dev_kfree_skb_any(skb);
2260
2261         IWL_DEBUG_MACDUMP(priv, "leave\n");
2262         return NETDEV_TX_OK;
2263 }
2264
2265 static int iwl_mac_add_interface(struct ieee80211_hw *hw,
2266                                  struct ieee80211_if_init_conf *conf)
2267 {
2268         struct iwl_priv *priv = hw->priv;
2269         unsigned long flags;
2270
2271         IWL_DEBUG_MAC80211(priv, "enter: type %d\n", conf->type);
2272
2273         if (priv->vif) {
2274                 IWL_DEBUG_MAC80211(priv, "leave - vif != NULL\n");
2275                 return -EOPNOTSUPP;
2276         }
2277
2278         spin_lock_irqsave(&priv->lock, flags);
2279         priv->vif = conf->vif;
2280         priv->iw_mode = conf->type;
2281
2282         spin_unlock_irqrestore(&priv->lock, flags);
2283
2284         mutex_lock(&priv->mutex);
2285
2286         if (conf->mac_addr) {
2287                 IWL_DEBUG_MAC80211(priv, "Set %pM\n", conf->mac_addr);
2288                 memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
2289         }
2290
2291         if (iwl_set_mode(priv, conf->type) == -EAGAIN)
2292                 /* we are not ready, will run again when ready */
2293                 set_bit(STATUS_MODE_PENDING, &priv->status);
2294
2295         mutex_unlock(&priv->mutex);
2296
2297         IWL_DEBUG_MAC80211(priv, "leave\n");
2298         return 0;
2299 }
2300
2301 /**
2302  * iwl_mac_config - mac80211 config callback
2303  *
2304  * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
2305  * be set inappropriately and the driver currently sets the hardware up to
2306  * use it whenever needed.
2307  */
2308 static int iwl_mac_config(struct ieee80211_hw *hw, u32 changed)
2309 {
2310         struct iwl_priv *priv = hw->priv;
2311         const struct iwl_channel_info *ch_info;
2312         struct ieee80211_conf *conf = &hw->conf;
2313         unsigned long flags;
2314         int ret = 0;
2315         u16 channel;
2316
2317         mutex_lock(&priv->mutex);
2318         IWL_DEBUG_MAC80211(priv, "enter to channel %d\n", conf->channel->hw_value);
2319
2320         priv->current_ht_config.is_ht = conf_is_ht(conf);
2321
2322         if (conf->radio_enabled && iwl_radio_kill_sw_enable_radio(priv)) {
2323                 IWL_DEBUG_MAC80211(priv, "leave - RF-KILL - waiting for uCode\n");
2324                 goto out;
2325         }
2326
2327         if (!conf->radio_enabled)
2328                 iwl_radio_kill_sw_disable_radio(priv);
2329
2330         if (!iwl_is_ready(priv)) {
2331                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2332                 ret = -EIO;
2333                 goto out;
2334         }
2335
2336         if (unlikely(!priv->cfg->mod_params->disable_hw_scan &&
2337                      test_bit(STATUS_SCANNING, &priv->status))) {
2338                 IWL_DEBUG_MAC80211(priv, "leave - scanning\n");
2339                 mutex_unlock(&priv->mutex);
2340                 return 0;
2341         }
2342
2343         channel = ieee80211_frequency_to_channel(conf->channel->center_freq);
2344         ch_info = iwl_get_channel_info(priv, conf->channel->band, channel);
2345         if (!is_channel_valid(ch_info)) {
2346                 IWL_DEBUG_MAC80211(priv, "leave - invalid channel\n");
2347                 ret = -EINVAL;
2348                 goto out;
2349         }
2350
2351         if (priv->iw_mode == NL80211_IFTYPE_ADHOC &&
2352             !is_channel_ibss(ch_info)) {
2353                 IWL_ERR(priv, "channel %d in band %d not IBSS channel\n",
2354                         conf->channel->hw_value, conf->channel->band);
2355                 ret = -EINVAL;
2356                 goto out;
2357         }
2358
2359         spin_lock_irqsave(&priv->lock, flags);
2360
2361
2362         /* if we are switching from ht to 2.4 clear flags
2363          * from any ht related info since 2.4 does not
2364          * support ht */
2365         if ((le16_to_cpu(priv->staging_rxon.channel) != channel)
2366 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
2367             && !(conf->flags & IEEE80211_CONF_CHANNEL_SWITCH)
2368 #endif
2369         )
2370                 priv->staging_rxon.flags = 0;
2371
2372         iwl_set_rxon_channel(priv, conf->channel);
2373
2374         iwl_set_flags_for_band(priv, conf->channel->band);
2375
2376         /* The list of supported rates and rate mask can be different
2377          * for each band; since the band may have changed, reset
2378          * the rate mask to what mac80211 lists */
2379         iwl_set_rate(priv);
2380
2381         spin_unlock_irqrestore(&priv->lock, flags);
2382
2383 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
2384         if (conf->flags & IEEE80211_CONF_CHANNEL_SWITCH) {
2385                 iwl_hw_channel_switch(priv, conf->channel);
2386                 goto out;
2387         }
2388 #endif
2389
2390         if (!conf->radio_enabled) {
2391                 IWL_DEBUG_MAC80211(priv, "leave - radio disabled\n");
2392                 goto out;
2393         }
2394
2395         if (iwl_is_rfkill(priv)) {
2396                 IWL_DEBUG_MAC80211(priv, "leave - RF kill\n");
2397                 ret = -EIO;
2398                 goto out;
2399         }
2400
2401         if (conf->flags & IEEE80211_CONF_PS)
2402                 ret = iwl_power_set_user_mode(priv, IWL_POWER_INDEX_3);
2403         else
2404                 ret = iwl_power_set_user_mode(priv, IWL_POWER_MODE_CAM);
2405         if (ret)
2406                 IWL_DEBUG_MAC80211(priv, "Error setting power level\n");
2407
2408         IWL_DEBUG_MAC80211(priv, "TX Power old=%d new=%d\n",
2409                            priv->tx_power_user_lmt, conf->power_level);
2410
2411         iwl_set_tx_power(priv, conf->power_level, false);
2412
2413         iwl_set_rate(priv);
2414
2415         /* call to ensure that 4965 rx_chain is set properly in monitor mode */
2416         iwl_set_rxon_chain(priv);
2417
2418         if (memcmp(&priv->active_rxon,
2419                    &priv->staging_rxon, sizeof(priv->staging_rxon)))
2420                 iwl_commit_rxon(priv);
2421         else
2422                 IWL_DEBUG_INFO(priv, "No re-sending same RXON configuration.\n");
2423
2424         IWL_DEBUG_MAC80211(priv, "leave\n");
2425
2426 out:
2427         mutex_unlock(&priv->mutex);
2428         return ret;
2429 }
2430
2431 static void iwl_config_ap(struct iwl_priv *priv)
2432 {
2433         int ret = 0;
2434         unsigned long flags;
2435
2436         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2437                 return;
2438
2439         /* The following should be done only at AP bring up */
2440         if (!iwl_is_associated(priv)) {
2441
2442                 /* RXON - unassoc (to set timing command) */
2443                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2444                 iwl_commit_rxon(priv);
2445
2446                 /* RXON Timing */
2447                 iwl_setup_rxon_timing(priv);
2448                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
2449                                 sizeof(priv->rxon_timing), &priv->rxon_timing);
2450                 if (ret)
2451                         IWL_WARN(priv, "REPLY_RXON_TIMING failed - "
2452                                         "Attempting to continue.\n");
2453
2454                 iwl_set_rxon_chain(priv);
2455
2456                 /* FIXME: what should be the assoc_id for AP? */
2457                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
2458                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
2459                         priv->staging_rxon.flags |=
2460                                 RXON_FLG_SHORT_PREAMBLE_MSK;
2461                 else
2462                         priv->staging_rxon.flags &=
2463                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
2464
2465                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
2466                         if (priv->assoc_capability &
2467                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
2468                                 priv->staging_rxon.flags |=
2469                                         RXON_FLG_SHORT_SLOT_MSK;
2470                         else
2471                                 priv->staging_rxon.flags &=
2472                                         ~RXON_FLG_SHORT_SLOT_MSK;
2473
2474                         if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
2475                                 priv->staging_rxon.flags &=
2476                                         ~RXON_FLG_SHORT_SLOT_MSK;
2477                 }
2478                 /* restore RXON assoc */
2479                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2480                 iwl_commit_rxon(priv);
2481                 spin_lock_irqsave(&priv->lock, flags);
2482                 iwl_activate_qos(priv, 1);
2483                 spin_unlock_irqrestore(&priv->lock, flags);
2484                 iwl_rxon_add_station(priv, iwl_bcast_addr, 0);
2485         }
2486         iwl_send_beacon_cmd(priv);
2487
2488         /* FIXME - we need to add code here to detect a totally new
2489          * configuration, reset the AP, unassoc, rxon timing, assoc,
2490          * clear sta table, add BCAST sta... */
2491 }
2492
2493
2494 static int iwl_mac_config_interface(struct ieee80211_hw *hw,
2495                                         struct ieee80211_vif *vif,
2496                                     struct ieee80211_if_conf *conf)
2497 {
2498         struct iwl_priv *priv = hw->priv;
2499         int rc;
2500
2501         if (conf == NULL)
2502                 return -EIO;
2503
2504         if (priv->vif != vif) {
2505                 IWL_DEBUG_MAC80211(priv, "leave - priv->vif != vif\n");
2506                 return 0;
2507         }
2508
2509         if (priv->iw_mode == NL80211_IFTYPE_ADHOC &&
2510             conf->changed & IEEE80211_IFCC_BEACON) {
2511                 struct sk_buff *beacon = ieee80211_beacon_get(hw, vif);
2512                 if (!beacon)
2513                         return -ENOMEM;
2514                 mutex_lock(&priv->mutex);
2515                 rc = iwl_mac_beacon_update(hw, beacon);
2516                 mutex_unlock(&priv->mutex);
2517                 if (rc)
2518                         return rc;
2519         }
2520
2521         if (!iwl_is_alive(priv))
2522                 return -EAGAIN;
2523
2524         mutex_lock(&priv->mutex);
2525
2526         if (conf->bssid)
2527                 IWL_DEBUG_MAC80211(priv, "bssid: %pM\n", conf->bssid);
2528
2529 /*
2530  * very dubious code was here; the probe filtering flag is never set:
2531  *
2532         if (unlikely(test_bit(STATUS_SCANNING, &priv->status)) &&
2533             !(priv->hw->flags & IEEE80211_HW_NO_PROBE_FILTERING)) {
2534  */
2535
2536         if (priv->iw_mode == NL80211_IFTYPE_AP) {
2537                 if (!conf->bssid) {
2538                         conf->bssid = priv->mac_addr;
2539                         memcpy(priv->bssid, priv->mac_addr, ETH_ALEN);
2540                         IWL_DEBUG_MAC80211(priv, "bssid was set to: %pM\n",
2541                                            conf->bssid);
2542                 }
2543                 if (priv->ibss_beacon)
2544                         dev_kfree_skb(priv->ibss_beacon);
2545
2546                 priv->ibss_beacon = ieee80211_beacon_get(hw, vif);
2547         }
2548
2549         if (iwl_is_rfkill(priv))
2550                 goto done;
2551
2552         if (conf->bssid && !is_zero_ether_addr(conf->bssid) &&
2553             !is_multicast_ether_addr(conf->bssid)) {
2554                 /* If there is currently a HW scan going on in the background
2555                  * then we need to cancel it else the RXON below will fail. */
2556                 if (iwl_scan_cancel_timeout(priv, 100)) {
2557                         IWL_WARN(priv, "Aborted scan still in progress "
2558                                     "after 100ms\n");
2559                         IWL_DEBUG_MAC80211(priv, "leaving - scan abort failed.\n");
2560                         mutex_unlock(&priv->mutex);
2561                         return -EAGAIN;
2562                 }
2563                 memcpy(priv->staging_rxon.bssid_addr, conf->bssid, ETH_ALEN);
2564
2565                 /* TODO: Audit driver for usage of these members and see
2566                  * if mac80211 deprecates them (priv->bssid looks like it
2567                  * shouldn't be there, but I haven't scanned the IBSS code
2568                  * to verify) - jpk */
2569                 memcpy(priv->bssid, conf->bssid, ETH_ALEN);
2570
2571                 if (priv->iw_mode == NL80211_IFTYPE_AP)
2572                         iwl_config_ap(priv);
2573                 else {
2574                         rc = iwl_commit_rxon(priv);
2575                         if ((priv->iw_mode == NL80211_IFTYPE_STATION) && rc)
2576                                 iwl_rxon_add_station(
2577                                         priv, priv->active_rxon.bssid_addr, 1);
2578                 }
2579
2580         } else {
2581                 iwl_scan_cancel_timeout(priv, 100);
2582                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2583                 iwl_commit_rxon(priv);
2584         }
2585
2586  done:
2587         IWL_DEBUG_MAC80211(priv, "leave\n");
2588         mutex_unlock(&priv->mutex);
2589
2590         return 0;
2591 }
2592
2593 static void iwl_mac_remove_interface(struct ieee80211_hw *hw,
2594                                      struct ieee80211_if_init_conf *conf)
2595 {
2596         struct iwl_priv *priv = hw->priv;
2597
2598         IWL_DEBUG_MAC80211(priv, "enter\n");
2599
2600         mutex_lock(&priv->mutex);
2601
2602         if (iwl_is_ready_rf(priv)) {
2603                 iwl_scan_cancel_timeout(priv, 100);
2604                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2605                 iwl_commit_rxon(priv);
2606         }
2607         if (priv->vif == conf->vif) {
2608                 priv->vif = NULL;
2609                 memset(priv->bssid, 0, ETH_ALEN);
2610         }
2611         mutex_unlock(&priv->mutex);
2612
2613         IWL_DEBUG_MAC80211(priv, "leave\n");
2614
2615 }
2616
2617 #define IWL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6)
2618 static void iwl_bss_info_changed(struct ieee80211_hw *hw,
2619                                      struct ieee80211_vif *vif,
2620                                      struct ieee80211_bss_conf *bss_conf,
2621                                      u32 changes)
2622 {
2623         struct iwl_priv *priv = hw->priv;
2624
2625         IWL_DEBUG_MAC80211(priv, "changes = 0x%X\n", changes);
2626
2627         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
2628                 IWL_DEBUG_MAC80211(priv, "ERP_PREAMBLE %d\n",
2629                                    bss_conf->use_short_preamble);
2630                 if (bss_conf->use_short_preamble)
2631                         priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2632                 else
2633                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2634         }
2635
2636         if (changes & BSS_CHANGED_ERP_CTS_PROT) {
2637                 IWL_DEBUG_MAC80211(priv, "ERP_CTS %d\n", bss_conf->use_cts_prot);
2638                 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
2639                         priv->staging_rxon.flags |= RXON_FLG_TGG_PROTECT_MSK;
2640                 else
2641                         priv->staging_rxon.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
2642         }
2643
2644         if (changes & BSS_CHANGED_HT) {
2645                 iwl_ht_conf(priv, bss_conf);
2646                 iwl_set_rxon_chain(priv);
2647         }
2648
2649         if (changes & BSS_CHANGED_ASSOC) {
2650                 IWL_DEBUG_MAC80211(priv, "ASSOC %d\n", bss_conf->assoc);
2651                 /* This should never happen as this function should
2652                  * never be called from interrupt context. */
2653                 if (WARN_ON_ONCE(in_interrupt()))
2654                         return;
2655                 if (bss_conf->assoc) {
2656                         priv->assoc_id = bss_conf->aid;
2657                         priv->beacon_int = bss_conf->beacon_int;
2658                         priv->power_data.dtim_period = bss_conf->dtim_period;
2659                         priv->timestamp = bss_conf->timestamp;
2660                         priv->assoc_capability = bss_conf->assoc_capability;
2661
2662                         /* we have just associated, don't start scan too early
2663                          * leave time for EAPOL exchange to complete
2664                          */
2665                         priv->next_scan_jiffies = jiffies +
2666                                         IWL_DELAY_NEXT_SCAN_AFTER_ASSOC;
2667                         mutex_lock(&priv->mutex);
2668                         iwl_post_associate(priv);
2669                         mutex_unlock(&priv->mutex);
2670                 } else {
2671                         priv->assoc_id = 0;
2672                         IWL_DEBUG_MAC80211(priv, "DISASSOC %d\n", bss_conf->assoc);
2673                 }
2674         } else if (changes && iwl_is_associated(priv) && priv->assoc_id) {
2675                         IWL_DEBUG_MAC80211(priv, "Associated Changes %d\n", changes);
2676                         iwl_send_rxon_assoc(priv);
2677         }
2678
2679 }
2680
2681 static int iwl_mac_hw_scan(struct ieee80211_hw *hw,
2682                            struct cfg80211_scan_request *req)
2683 {
2684         unsigned long flags;
2685         struct iwl_priv *priv = hw->priv;
2686         int ret;
2687         u8 *ssid = NULL;
2688         size_t ssid_len = 0;
2689
2690         if (req->n_ssids) {
2691                 ssid = req->ssids[0].ssid;
2692                 ssid_len = req->ssids[0].ssid_len;
2693         }
2694
2695         IWL_DEBUG_MAC80211(priv, "enter\n");
2696
2697         mutex_lock(&priv->mutex);
2698         spin_lock_irqsave(&priv->lock, flags);
2699
2700         if (!iwl_is_ready_rf(priv)) {
2701                 ret = -EIO;
2702                 IWL_DEBUG_MAC80211(priv, "leave - not ready or exit pending\n");
2703                 goto out_unlock;
2704         }
2705
2706         /* We don't schedule scan within next_scan_jiffies period.
2707          * Avoid scanning during possible EAPOL exchange, return
2708          * success immediately.
2709          */
2710         if (priv->next_scan_jiffies &&
2711             time_after(priv->next_scan_jiffies, jiffies)) {
2712                 IWL_DEBUG_SCAN(priv, "scan rejected: within next scan period\n");
2713                 queue_work(priv->workqueue, &priv->scan_completed);
2714                 ret = 0;
2715                 goto out_unlock;
2716         }
2717
2718         /* if we just finished scan ask for delay */
2719         if (iwl_is_associated(priv) && priv->last_scan_jiffies &&
2720             time_after(priv->last_scan_jiffies + IWL_DELAY_NEXT_SCAN, jiffies)) {
2721                 IWL_DEBUG_SCAN(priv, "scan rejected: within previous scan period\n");
2722                 queue_work(priv->workqueue, &priv->scan_completed);
2723                 ret = 0;
2724                 goto out_unlock;
2725         }
2726
2727         if (ssid_len) {
2728                 priv->one_direct_scan = 1;
2729                 priv->direct_ssid_len = ssid_len;
2730                 memcpy(priv->direct_ssid, ssid, priv->direct_ssid_len);
2731         } else {
2732                 priv->one_direct_scan = 0;
2733         }
2734
2735         ret = iwl_scan_initiate(priv);
2736
2737         IWL_DEBUG_MAC80211(priv, "leave\n");
2738
2739 out_unlock:
2740         spin_unlock_irqrestore(&priv->lock, flags);
2741         mutex_unlock(&priv->mutex);
2742
2743         return ret;
2744 }
2745
2746 static void iwl_mac_update_tkip_key(struct ieee80211_hw *hw,
2747                         struct ieee80211_key_conf *keyconf, const u8 *addr,
2748                         u32 iv32, u16 *phase1key)
2749 {
2750
2751         struct iwl_priv *priv = hw->priv;
2752         IWL_DEBUG_MAC80211(priv, "enter\n");
2753
2754         iwl_update_tkip_key(priv, keyconf, addr, iv32, phase1key);
2755
2756         IWL_DEBUG_MAC80211(priv, "leave\n");
2757 }
2758
2759 static int iwl_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
2760                            struct ieee80211_vif *vif,
2761                            struct ieee80211_sta *sta,
2762                            struct ieee80211_key_conf *key)
2763 {
2764         struct iwl_priv *priv = hw->priv;
2765         const u8 *addr;
2766         int ret;
2767         u8 sta_id;
2768         bool is_default_wep_key = false;
2769
2770         IWL_DEBUG_MAC80211(priv, "enter\n");
2771
2772         if (priv->hw_params.sw_crypto) {
2773                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
2774                 return -EOPNOTSUPP;
2775         }
2776         addr = sta ? sta->addr : iwl_bcast_addr;
2777         sta_id = iwl_find_station(priv, addr);
2778         if (sta_id == IWL_INVALID_STATION) {
2779                 IWL_DEBUG_MAC80211(priv, "leave - %pM not in station map.\n",
2780                                    addr);
2781                 return -EINVAL;
2782
2783         }
2784
2785         mutex_lock(&priv->mutex);
2786         iwl_scan_cancel_timeout(priv, 100);
2787         mutex_unlock(&priv->mutex);
2788
2789         /* If we are getting WEP group key and we didn't receive any key mapping
2790          * so far, we are in legacy wep mode (group key only), otherwise we are
2791          * in 1X mode.
2792          * In legacy wep mode, we use another host command to the uCode */
2793         if (key->alg == ALG_WEP && sta_id == priv->hw_params.bcast_sta_id &&
2794                 priv->iw_mode != NL80211_IFTYPE_AP) {
2795                 if (cmd == SET_KEY)
2796                         is_default_wep_key = !priv->key_mapping_key;
2797                 else
2798                         is_default_wep_key =
2799                                         (key->hw_key_idx == HW_KEY_DEFAULT);
2800         }
2801
2802         switch (cmd) {
2803         case SET_KEY:
2804                 if (is_default_wep_key)
2805                         ret = iwl_set_default_wep_key(priv, key);
2806                 else
2807                         ret = iwl_set_dynamic_key(priv, key, sta_id);
2808
2809                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
2810                 break;
2811         case DISABLE_KEY:
2812                 if (is_default_wep_key)
2813                         ret = iwl_remove_default_wep_key(priv, key);
2814                 else
2815                         ret = iwl_remove_dynamic_key(priv, key, sta_id);
2816
2817                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
2818                 break;
2819         default:
2820                 ret = -EINVAL;
2821         }
2822
2823         IWL_DEBUG_MAC80211(priv, "leave\n");
2824
2825         return ret;
2826 }
2827
2828 static int iwl_mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
2829                            const struct ieee80211_tx_queue_params *params)
2830 {
2831         struct iwl_priv *priv = hw->priv;
2832         unsigned long flags;
2833         int q;
2834
2835         IWL_DEBUG_MAC80211(priv, "enter\n");
2836
2837         if (!iwl_is_ready_rf(priv)) {
2838                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
2839                 return -EIO;
2840         }
2841
2842         if (queue >= AC_NUM) {
2843                 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
2844                 return 0;
2845         }
2846
2847         q = AC_NUM - 1 - queue;
2848
2849         spin_lock_irqsave(&priv->lock, flags);
2850
2851         priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
2852         priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
2853         priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
2854         priv->qos_data.def_qos_parm.ac[q].edca_txop =
2855                         cpu_to_le16((params->txop * 32));
2856
2857         priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
2858         priv->qos_data.qos_active = 1;
2859
2860         if (priv->iw_mode == NL80211_IFTYPE_AP)
2861                 iwl_activate_qos(priv, 1);
2862         else if (priv->assoc_id && iwl_is_associated(priv))
2863                 iwl_activate_qos(priv, 0);
2864
2865         spin_unlock_irqrestore(&priv->lock, flags);
2866
2867         IWL_DEBUG_MAC80211(priv, "leave\n");
2868         return 0;
2869 }
2870
2871 static int iwl_mac_ampdu_action(struct ieee80211_hw *hw,
2872                              enum ieee80211_ampdu_mlme_action action,
2873                              struct ieee80211_sta *sta, u16 tid, u16 *ssn)
2874 {
2875         struct iwl_priv *priv = hw->priv;
2876
2877         IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n",
2878                      sta->addr, tid);
2879
2880         if (!(priv->cfg->sku & IWL_SKU_N))
2881                 return -EACCES;
2882
2883         switch (action) {
2884         case IEEE80211_AMPDU_RX_START:
2885                 IWL_DEBUG_HT(priv, "start Rx\n");
2886                 return iwl_sta_rx_agg_start(priv, sta->addr, tid, *ssn);
2887         case IEEE80211_AMPDU_RX_STOP:
2888                 IWL_DEBUG_HT(priv, "stop Rx\n");
2889                 return iwl_sta_rx_agg_stop(priv, sta->addr, tid);
2890         case IEEE80211_AMPDU_TX_START:
2891                 IWL_DEBUG_HT(priv, "start Tx\n");
2892                 return iwl_tx_agg_start(priv, sta->addr, tid, ssn);
2893         case IEEE80211_AMPDU_TX_STOP:
2894                 IWL_DEBUG_HT(priv, "stop Tx\n");
2895                 return iwl_tx_agg_stop(priv, sta->addr, tid);
2896         default:
2897                 IWL_DEBUG_HT(priv, "unknown\n");
2898                 return -EINVAL;
2899                 break;
2900         }
2901         return 0;
2902 }
2903
2904 static int iwl_mac_get_tx_stats(struct ieee80211_hw *hw,
2905                                 struct ieee80211_tx_queue_stats *stats)
2906 {
2907         struct iwl_priv *priv = hw->priv;
2908         int i, avail;
2909         struct iwl_tx_queue *txq;
2910         struct iwl_queue *q;
2911         unsigned long flags;
2912
2913         IWL_DEBUG_MAC80211(priv, "enter\n");
2914
2915         if (!iwl_is_ready_rf(priv)) {
2916                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
2917                 return -EIO;
2918         }
2919
2920         spin_lock_irqsave(&priv->lock, flags);
2921
2922         for (i = 0; i < AC_NUM; i++) {
2923                 txq = &priv->txq[i];
2924                 q = &txq->q;
2925                 avail = iwl_queue_space(q);
2926
2927                 stats[i].len = q->n_window - avail;
2928                 stats[i].limit = q->n_window - q->high_mark;
2929                 stats[i].count = q->n_window;
2930
2931         }
2932         spin_unlock_irqrestore(&priv->lock, flags);
2933
2934         IWL_DEBUG_MAC80211(priv, "leave\n");
2935
2936         return 0;
2937 }
2938
2939 static int iwl_mac_get_stats(struct ieee80211_hw *hw,
2940                              struct ieee80211_low_level_stats *stats)
2941 {
2942         struct iwl_priv *priv = hw->priv;
2943
2944         priv = hw->priv;
2945         IWL_DEBUG_MAC80211(priv, "enter\n");
2946         IWL_DEBUG_MAC80211(priv, "leave\n");
2947
2948         return 0;
2949 }
2950
2951 static void iwl_mac_reset_tsf(struct ieee80211_hw *hw)
2952 {
2953         struct iwl_priv *priv = hw->priv;
2954         unsigned long flags;
2955
2956         mutex_lock(&priv->mutex);
2957         IWL_DEBUG_MAC80211(priv, "enter\n");
2958
2959         spin_lock_irqsave(&priv->lock, flags);
2960         memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_info));
2961         spin_unlock_irqrestore(&priv->lock, flags);
2962
2963         iwl_reset_qos(priv);
2964
2965         spin_lock_irqsave(&priv->lock, flags);
2966         priv->assoc_id = 0;
2967         priv->assoc_capability = 0;
2968         priv->assoc_station_added = 0;
2969
2970         /* new association get rid of ibss beacon skb */
2971         if (priv->ibss_beacon)
2972                 dev_kfree_skb(priv->ibss_beacon);
2973
2974         priv->ibss_beacon = NULL;
2975
2976         priv->beacon_int = priv->hw->conf.beacon_int;
2977         priv->timestamp = 0;
2978         if ((priv->iw_mode == NL80211_IFTYPE_STATION))
2979                 priv->beacon_int = 0;
2980
2981         spin_unlock_irqrestore(&priv->lock, flags);
2982
2983         if (!iwl_is_ready_rf(priv)) {
2984                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2985                 mutex_unlock(&priv->mutex);
2986                 return;
2987         }
2988
2989         /* we are restarting association process
2990          * clear RXON_FILTER_ASSOC_MSK bit
2991          */
2992         if (priv->iw_mode != NL80211_IFTYPE_AP) {
2993                 iwl_scan_cancel_timeout(priv, 100);
2994                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2995                 iwl_commit_rxon(priv);
2996         }
2997
2998         iwl_power_update_mode(priv, 0);
2999
3000         /* Per mac80211.h: This is only used in IBSS mode... */
3001         if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
3002
3003                 /* switch to CAM during association period.
3004                  * the ucode will block any association/authentication
3005                  * frome during assiciation period if it can not hear
3006                  * the AP because of PM. the timer enable PM back is
3007                  * association do not complete
3008                  */
3009                 if (priv->hw->conf.channel->flags & (IEEE80211_CHAN_PASSIVE_SCAN |
3010                                                      IEEE80211_CHAN_RADAR))
3011                                 iwl_power_disable_management(priv, 3000);
3012
3013                 IWL_DEBUG_MAC80211(priv, "leave - not in IBSS\n");
3014                 mutex_unlock(&priv->mutex);
3015                 return;
3016         }
3017
3018         iwl_set_rate(priv);
3019
3020         mutex_unlock(&priv->mutex);
3021
3022         IWL_DEBUG_MAC80211(priv, "leave\n");
3023 }
3024
3025 static int iwl_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb)
3026 {
3027         struct iwl_priv *priv = hw->priv;
3028         unsigned long flags;
3029         __le64 timestamp;
3030
3031         IWL_DEBUG_MAC80211(priv, "enter\n");
3032
3033         if (!iwl_is_ready_rf(priv)) {
3034                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
3035                 return -EIO;
3036         }
3037
3038         if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
3039                 IWL_DEBUG_MAC80211(priv, "leave - not IBSS\n");
3040                 return -EIO;
3041         }
3042
3043         spin_lock_irqsave(&priv->lock, flags);
3044
3045         if (priv->ibss_beacon)
3046                 dev_kfree_skb(priv->ibss_beacon);
3047
3048         priv->ibss_beacon = skb;
3049
3050         priv->assoc_id = 0;
3051         timestamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
3052         priv->timestamp = le64_to_cpu(timestamp);
3053
3054         IWL_DEBUG_MAC80211(priv, "leave\n");
3055         spin_unlock_irqrestore(&priv->lock, flags);
3056
3057         iwl_reset_qos(priv);
3058
3059         iwl_post_associate(priv);
3060
3061
3062         return 0;
3063 }
3064
3065 /*****************************************************************************
3066  *
3067  * sysfs attributes
3068  *
3069  *****************************************************************************/
3070
3071 #ifdef CONFIG_IWLWIFI_DEBUG
3072
3073 /*
3074  * The following adds a new attribute to the sysfs representation
3075  * of this device driver (i.e. a new file in /sys/class/net/wlan0/device/)
3076  * used for controlling the debug level.
3077  *
3078  * See the level definitions in iwl for details.
3079  */
3080
3081 static ssize_t show_debug_level(struct device *d,
3082                                 struct device_attribute *attr, char *buf)
3083 {
3084         struct iwl_priv *priv = d->driver_data;
3085
3086         return sprintf(buf, "0x%08X\n", priv->debug_level);
3087 }
3088 static ssize_t store_debug_level(struct device *d,
3089                                 struct device_attribute *attr,
3090                                  const char *buf, size_t count)
3091 {
3092         struct iwl_priv *priv = d->driver_data;
3093         unsigned long val;
3094         int ret;
3095
3096         ret = strict_strtoul(buf, 0, &val);
3097         if (ret)
3098                 IWL_ERR(priv, "%s is not in hex or decimal form.\n", buf);
3099         else
3100                 priv->debug_level = val;
3101
3102         return strnlen(buf, count);
3103 }
3104
3105 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
3106                         show_debug_level, store_debug_level);
3107
3108
3109 #endif /* CONFIG_IWLWIFI_DEBUG */
3110
3111
3112 static ssize_t show_version(struct device *d,
3113                                 struct device_attribute *attr, char *buf)
3114 {
3115         struct iwl_priv *priv = d->driver_data;
3116         struct iwl_alive_resp *palive = &priv->card_alive;
3117         ssize_t pos = 0;
3118         u16 eeprom_ver;
3119
3120         if (palive->is_valid)
3121                 pos += sprintf(buf + pos,
3122                                 "fw version: 0x%01X.0x%01X.0x%01X.0x%01X\n"
3123                                 "fw type: 0x%01X 0x%01X\n",
3124                                 palive->ucode_major, palive->ucode_minor,
3125                                 palive->sw_rev[0], palive->sw_rev[1],
3126                                 palive->ver_type, palive->ver_subtype);
3127         else
3128                 pos += sprintf(buf + pos, "fw not loaded\n");
3129
3130         if (priv->eeprom) {
3131                 eeprom_ver = iwl_eeprom_query16(priv, EEPROM_VERSION);
3132                 pos += sprintf(buf + pos, "EEPROM version: 0x%x\n",
3133                                  eeprom_ver);
3134         } else {
3135                 pos += sprintf(buf + pos, "EEPROM not initialzed\n");
3136         }
3137
3138         return pos;
3139 }
3140
3141 static DEVICE_ATTR(version, S_IWUSR | S_IRUGO, show_version, NULL);
3142
3143 static ssize_t show_temperature(struct device *d,
3144                                 struct device_attribute *attr, char *buf)
3145 {
3146         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3147
3148         if (!iwl_is_alive(priv))
3149                 return -EAGAIN;
3150
3151         return sprintf(buf, "%d\n", priv->temperature);
3152 }
3153
3154 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
3155
3156 static ssize_t show_tx_power(struct device *d,
3157                              struct device_attribute *attr, char *buf)
3158 {
3159         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3160
3161         if (!iwl_is_ready_rf(priv))
3162                 return sprintf(buf, "off\n");
3163         else
3164                 return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
3165 }
3166
3167 static ssize_t store_tx_power(struct device *d,
3168                               struct device_attribute *attr,
3169                               const char *buf, size_t count)
3170 {
3171         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3172         unsigned long val;
3173         int ret;
3174
3175         ret = strict_strtoul(buf, 10, &val);
3176         if (ret)
3177                 IWL_INFO(priv, "%s is not in decimal form.\n", buf);
3178         else
3179                 iwl_set_tx_power(priv, val, false);
3180
3181         return count;
3182 }
3183
3184 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
3185
3186 static ssize_t show_flags(struct device *d,
3187                           struct device_attribute *attr, char *buf)
3188 {
3189         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3190
3191         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
3192 }
3193
3194 static ssize_t store_flags(struct device *d,
3195                            struct device_attribute *attr,
3196                            const char *buf, size_t count)
3197 {
3198         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3199         unsigned long val;
3200         u32 flags;
3201         int ret = strict_strtoul(buf, 0, &val);
3202         if (ret)
3203                 return ret;
3204         flags = (u32)val;
3205
3206         mutex_lock(&priv->mutex);
3207         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
3208                 /* Cancel any currently running scans... */
3209                 if (iwl_scan_cancel_timeout(priv, 100))
3210                         IWL_WARN(priv, "Could not cancel scan.\n");
3211                 else {
3212                         IWL_DEBUG_INFO(priv, "Commit rxon.flags = 0x%04X\n", flags);
3213                         priv->staging_rxon.flags = cpu_to_le32(flags);
3214                         iwl_commit_rxon(priv);
3215                 }
3216         }
3217         mutex_unlock(&priv->mutex);
3218
3219         return count;
3220 }
3221
3222 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
3223
3224 static ssize_t show_filter_flags(struct device *d,
3225                                  struct device_attribute *attr, char *buf)
3226 {
3227         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3228
3229         return sprintf(buf, "0x%04X\n",
3230                 le32_to_cpu(priv->active_rxon.filter_flags));
3231 }
3232
3233 static ssize_t store_filter_flags(struct device *d,
3234                                   struct device_attribute *attr,
3235                                   const char *buf, size_t count)
3236 {
3237         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3238         unsigned long val;
3239         u32 filter_flags;
3240         int ret = strict_strtoul(buf, 0, &val);
3241         if (ret)
3242                 return ret;
3243         filter_flags = (u32)val;
3244
3245         mutex_lock(&priv->mutex);
3246         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
3247                 /* Cancel any currently running scans... */
3248                 if (iwl_scan_cancel_timeout(priv, 100))
3249                         IWL_WARN(priv, "Could not cancel scan.\n");
3250                 else {
3251                         IWL_DEBUG_INFO(priv, "Committing rxon.filter_flags = "
3252                                        "0x%04X\n", filter_flags);
3253                         priv->staging_rxon.filter_flags =
3254                                 cpu_to_le32(filter_flags);
3255                         iwl_commit_rxon(priv);
3256                 }
3257         }
3258         mutex_unlock(&priv->mutex);
3259
3260         return count;
3261 }
3262
3263 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
3264                    store_filter_flags);
3265
3266 static ssize_t store_power_level(struct device *d,
3267                                  struct device_attribute *attr,
3268                                  const char *buf, size_t count)
3269 {
3270         struct iwl_priv *priv = dev_get_drvdata(d);
3271         int ret;
3272         unsigned long mode;
3273
3274
3275         mutex_lock(&priv->mutex);
3276
3277         if (!iwl_is_ready(priv)) {
3278                 ret = -EAGAIN;
3279                 goto out;
3280         }
3281
3282         ret = strict_strtoul(buf, 10, &mode);
3283         if (ret)
3284                 goto out;
3285
3286         ret = iwl_power_set_user_mode(priv, mode);
3287         if (ret) {
3288                 IWL_DEBUG_MAC80211(priv, "failed setting power mode.\n");
3289                 goto out;
3290         }
3291         ret = count;
3292
3293  out:
3294         mutex_unlock(&priv->mutex);
3295         return ret;
3296 }
3297
3298 static ssize_t show_power_level(struct device *d,
3299                                 struct device_attribute *attr, char *buf)
3300 {
3301         struct iwl_priv *priv = dev_get_drvdata(d);
3302         int mode = priv->power_data.user_power_setting;
3303         int system = priv->power_data.system_power_setting;
3304         int level = priv->power_data.power_mode;
3305         char *p = buf;
3306
3307         switch (system) {
3308         case IWL_POWER_SYS_AUTO:
3309                 p += sprintf(p, "SYSTEM:auto");
3310                 break;
3311         case IWL_POWER_SYS_AC:
3312                 p += sprintf(p, "SYSTEM:ac");
3313                 break;
3314         case IWL_POWER_SYS_BATTERY:
3315                 p += sprintf(p, "SYSTEM:battery");
3316                 break;
3317         }
3318
3319         p += sprintf(p, "\tMODE:%s", (mode < IWL_POWER_AUTO) ?
3320                         "fixed" : "auto");
3321         p += sprintf(p, "\tINDEX:%d", level);
3322         p += sprintf(p, "\n");
3323         return p - buf + 1;
3324 }
3325
3326 static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR, show_power_level,
3327                    store_power_level);
3328
3329
3330 static ssize_t show_statistics(struct device *d,
3331                                struct device_attribute *attr, char *buf)
3332 {
3333         struct iwl_priv *priv = dev_get_drvdata(d);
3334         u32 size = sizeof(struct iwl_notif_statistics);
3335         u32 len = 0, ofs = 0;
3336         u8 *data = (u8 *)&priv->statistics;
3337         int rc = 0;
3338
3339         if (!iwl_is_alive(priv))
3340                 return -EAGAIN;
3341
3342         mutex_lock(&priv->mutex);
3343         rc = iwl_send_statistics_request(priv, 0);
3344         mutex_unlock(&priv->mutex);
3345
3346         if (rc) {
3347                 len = sprintf(buf,
3348                               "Error sending statistics request: 0x%08X\n", rc);
3349                 return len;
3350         }
3351
3352         while (size && (PAGE_SIZE - len)) {
3353                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3354                                    PAGE_SIZE - len, 1);
3355                 len = strlen(buf);
3356                 if (PAGE_SIZE - len)
3357                         buf[len++] = '\n';
3358
3359                 ofs += 16;
3360                 size -= min(size, 16U);
3361         }
3362
3363         return len;
3364 }
3365
3366 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
3367
3368
3369 /*****************************************************************************
3370  *
3371  * driver setup and teardown
3372  *
3373  *****************************************************************************/
3374
3375 static void iwl_setup_deferred_work(struct iwl_priv *priv)
3376 {
3377         priv->workqueue = create_workqueue(DRV_NAME);
3378
3379         init_waitqueue_head(&priv->wait_command_queue);
3380
3381         INIT_WORK(&priv->up, iwl_bg_up);
3382         INIT_WORK(&priv->restart, iwl_bg_restart);
3383         INIT_WORK(&priv->rx_replenish, iwl_bg_rx_replenish);
3384         INIT_WORK(&priv->rf_kill, iwl_bg_rf_kill);
3385         INIT_WORK(&priv->beacon_update, iwl_bg_beacon_update);
3386         INIT_WORK(&priv->run_time_calib_work, iwl_bg_run_time_calib_work);
3387         INIT_DELAYED_WORK(&priv->init_alive_start, iwl_bg_init_alive_start);
3388         INIT_DELAYED_WORK(&priv->alive_start, iwl_bg_alive_start);
3389
3390         iwl_setup_scan_deferred_work(priv);
3391         iwl_setup_power_deferred_work(priv);
3392
3393         if (priv->cfg->ops->lib->setup_deferred_work)
3394                 priv->cfg->ops->lib->setup_deferred_work(priv);
3395
3396         init_timer(&priv->statistics_periodic);
3397         priv->statistics_periodic.data = (unsigned long)priv;
3398         priv->statistics_periodic.function = iwl_bg_statistics_periodic;
3399
3400         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
3401                      iwl_irq_tasklet, (unsigned long)priv);
3402 }
3403
3404 static void iwl_cancel_deferred_work(struct iwl_priv *priv)
3405 {
3406         if (priv->cfg->ops->lib->cancel_deferred_work)
3407                 priv->cfg->ops->lib->cancel_deferred_work(priv);
3408
3409         cancel_delayed_work_sync(&priv->init_alive_start);
3410         cancel_delayed_work(&priv->scan_check);
3411         cancel_delayed_work_sync(&priv->set_power_save);
3412         cancel_delayed_work(&priv->alive_start);
3413         cancel_work_sync(&priv->beacon_update);
3414         del_timer_sync(&priv->statistics_periodic);
3415 }
3416
3417 static struct attribute *iwl_sysfs_entries[] = {
3418         &dev_attr_flags.attr,
3419         &dev_attr_filter_flags.attr,
3420         &dev_attr_power_level.attr,
3421         &dev_attr_statistics.attr,
3422         &dev_attr_temperature.attr,
3423         &dev_attr_tx_power.attr,
3424 #ifdef CONFIG_IWLWIFI_DEBUG
3425         &dev_attr_debug_level.attr,
3426 #endif
3427         &dev_attr_version.attr,
3428
3429         NULL
3430 };
3431
3432 static struct attribute_group iwl_attribute_group = {
3433         .name = NULL,           /* put in device directory */
3434         .attrs = iwl_sysfs_entries,
3435 };
3436
3437 static struct ieee80211_ops iwl_hw_ops = {
3438         .tx = iwl_mac_tx,
3439         .start = iwl_mac_start,
3440         .stop = iwl_mac_stop,
3441         .add_interface = iwl_mac_add_interface,
3442         .remove_interface = iwl_mac_remove_interface,
3443         .config = iwl_mac_config,
3444         .config_interface = iwl_mac_config_interface,
3445         .configure_filter = iwl_configure_filter,
3446         .set_key = iwl_mac_set_key,
3447         .update_tkip_key = iwl_mac_update_tkip_key,
3448         .get_stats = iwl_mac_get_stats,
3449         .get_tx_stats = iwl_mac_get_tx_stats,
3450         .conf_tx = iwl_mac_conf_tx,
3451         .reset_tsf = iwl_mac_reset_tsf,
3452         .bss_info_changed = iwl_bss_info_changed,
3453         .ampdu_action = iwl_mac_ampdu_action,
3454         .hw_scan = iwl_mac_hw_scan
3455 };
3456
3457 static int iwl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3458 {
3459         int err = 0;
3460         struct iwl_priv *priv;
3461         struct ieee80211_hw *hw;
3462         struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
3463         unsigned long flags;
3464         u16 pci_cmd;
3465
3466         /************************
3467          * 1. Allocating HW data
3468          ************************/
3469
3470         /* Disabling hardware scan means that mac80211 will perform scans
3471          * "the hard way", rather than using device's scan. */
3472         if (cfg->mod_params->disable_hw_scan) {
3473                 if (cfg->mod_params->debug & IWL_DL_INFO)
3474                         dev_printk(KERN_DEBUG, &(pdev->dev),
3475                                    "Disabling hw_scan\n");
3476                 iwl_hw_ops.hw_scan = NULL;
3477         }
3478
3479         hw = iwl_alloc_all(cfg, &iwl_hw_ops);
3480         if (!hw) {
3481                 err = -ENOMEM;
3482                 goto out;
3483         }
3484         priv = hw->priv;
3485         /* At this point both hw and priv are allocated. */
3486
3487         SET_IEEE80211_DEV(hw, &pdev->dev);
3488
3489         IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
3490         priv->cfg = cfg;
3491         priv->pci_dev = pdev;
3492
3493 #ifdef CONFIG_IWLWIFI_DEBUG
3494         priv->debug_level = priv->cfg->mod_params->debug;
3495         atomic_set(&priv->restrict_refcnt, 0);
3496 #endif
3497
3498         /**************************
3499          * 2. Initializing PCI bus
3500          **************************/
3501         if (pci_enable_device(pdev)) {
3502                 err = -ENODEV;
3503                 goto out_ieee80211_free_hw;
3504         }
3505
3506         pci_set_master(pdev);
3507
3508         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(36));
3509         if (!err)
3510                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(36));
3511         if (err) {
3512                 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
3513                 if (!err)
3514                         err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
3515                 /* both attempts failed: */
3516                 if (err) {
3517                         IWL_WARN(priv, "No suitable DMA available.\n");
3518                         goto out_pci_disable_device;
3519                 }
3520         }
3521
3522         err = pci_request_regions(pdev, DRV_NAME);
3523         if (err)
3524                 goto out_pci_disable_device;
3525
3526         pci_set_drvdata(pdev, priv);
3527
3528
3529         /***********************
3530          * 3. Read REV register
3531          ***********************/
3532         priv->hw_base = pci_iomap(pdev, 0, 0);
3533         if (!priv->hw_base) {
3534                 err = -ENODEV;
3535                 goto out_pci_release_regions;
3536         }
3537
3538         IWL_DEBUG_INFO(priv, "pci_resource_len = 0x%08llx\n",
3539                 (unsigned long long) pci_resource_len(pdev, 0));
3540         IWL_DEBUG_INFO(priv, "pci_resource_base = %p\n", priv->hw_base);
3541
3542         iwl_hw_detect(priv);
3543         IWL_INFO(priv, "Detected Intel Wireless WiFi Link %s REV=0x%X\n",
3544                 priv->cfg->name, priv->hw_rev);
3545
3546         /* We disable the RETRY_TIMEOUT register (0x41) to keep
3547          * PCI Tx retries from interfering with C3 CPU state */
3548         pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
3549
3550         /* amp init */
3551         err = priv->cfg->ops->lib->apm_ops.init(priv);
3552         if (err < 0) {
3553                 IWL_DEBUG_INFO(priv, "Failed to init APMG\n");
3554                 goto out_iounmap;
3555         }
3556         /*****************
3557          * 4. Read EEPROM
3558          *****************/
3559         /* Read the EEPROM */
3560         err = iwl_eeprom_init(priv);
3561         if (err) {
3562                 IWL_ERR(priv, "Unable to init EEPROM\n");
3563                 goto out_iounmap;
3564         }
3565         err = iwl_eeprom_check_version(priv);
3566         if (err)
3567                 goto out_iounmap;
3568
3569         /* extract MAC Address */
3570         iwl_eeprom_get_mac(priv, priv->mac_addr);
3571         IWL_DEBUG_INFO(priv, "MAC address: %pM\n", priv->mac_addr);
3572         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
3573
3574         /************************
3575          * 5. Setup HW constants
3576          ************************/
3577         if (iwl_set_hw_params(priv)) {
3578                 IWL_ERR(priv, "failed to set hw parameters\n");
3579                 goto out_free_eeprom;
3580         }
3581
3582         /*******************
3583          * 6. Setup priv
3584          *******************/
3585
3586         err = iwl_init_drv(priv);
3587         if (err)
3588                 goto out_free_eeprom;
3589         /* At this point both hw and priv are initialized. */
3590
3591         /**********************************
3592          * 7. Initialize module parameters
3593          **********************************/
3594
3595         /* Disable radio (SW RF KILL) via parameter when loading driver */
3596         if (priv->cfg->mod_params->disable) {
3597                 set_bit(STATUS_RF_KILL_SW, &priv->status);
3598                 IWL_DEBUG_INFO(priv, "Radio disabled.\n");
3599         }
3600
3601         /********************
3602          * 8. Setup services
3603          ********************/
3604         spin_lock_irqsave(&priv->lock, flags);
3605         iwl_disable_interrupts(priv);
3606         spin_unlock_irqrestore(&priv->lock, flags);
3607
3608         pci_enable_msi(priv->pci_dev);
3609
3610         err = request_irq(priv->pci_dev->irq, iwl_isr, IRQF_SHARED,
3611                           DRV_NAME, priv);
3612         if (err) {
3613                 IWL_ERR(priv, "Error allocating IRQ %d\n", priv->pci_dev->irq);
3614                 goto out_disable_msi;
3615         }
3616         err = sysfs_create_group(&pdev->dev.kobj, &iwl_attribute_group);
3617         if (err) {
3618                 IWL_ERR(priv, "failed to create sysfs device attributes\n");
3619                 goto out_uninit_drv;
3620         }
3621
3622         iwl_setup_deferred_work(priv);
3623         iwl_setup_rx_handlers(priv);
3624
3625         /**********************************
3626          * 9. Setup and register mac80211
3627          **********************************/
3628
3629         /* enable interrupts if needed: hw bug w/a */
3630         pci_read_config_word(priv->pci_dev, PCI_COMMAND, &pci_cmd);
3631         if (pci_cmd & PCI_COMMAND_INTX_DISABLE) {
3632                 pci_cmd &= ~PCI_COMMAND_INTX_DISABLE;
3633                 pci_write_config_word(priv->pci_dev, PCI_COMMAND, pci_cmd);
3634         }
3635
3636         iwl_enable_interrupts(priv);
3637
3638         err = iwl_setup_mac(priv);
3639         if (err)
3640                 goto out_remove_sysfs;
3641
3642         err = iwl_dbgfs_register(priv, DRV_NAME);
3643         if (err)
3644                 IWL_ERR(priv, "failed to create debugfs files\n");
3645
3646         /* If platform's RF_KILL switch is NOT set to KILL */
3647         if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
3648                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
3649         else
3650                 set_bit(STATUS_RF_KILL_HW, &priv->status);
3651
3652         err = iwl_rfkill_init(priv);
3653         if (err)
3654                 IWL_ERR(priv, "Unable to initialize RFKILL system. "
3655                                   "Ignoring error: %d\n", err);
3656         else
3657                 iwl_rfkill_set_hw_state(priv);
3658
3659         iwl_power_initialize(priv);
3660         return 0;
3661
3662  out_remove_sysfs:
3663         sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
3664  out_disable_msi:
3665         pci_disable_msi(priv->pci_dev);
3666         pci_disable_device(priv->pci_dev);
3667  out_uninit_drv:
3668         iwl_uninit_drv(priv);
3669  out_free_eeprom:
3670         iwl_eeprom_free(priv);
3671  out_iounmap:
3672         pci_iounmap(pdev, priv->hw_base);
3673  out_pci_release_regions:
3674         pci_release_regions(pdev);
3675         pci_set_drvdata(pdev, NULL);
3676  out_pci_disable_device:
3677         pci_disable_device(pdev);
3678  out_ieee80211_free_hw:
3679         ieee80211_free_hw(priv->hw);
3680  out:
3681         return err;
3682 }
3683
3684 static void __devexit iwl_pci_remove(struct pci_dev *pdev)
3685 {
3686         struct iwl_priv *priv = pci_get_drvdata(pdev);
3687         unsigned long flags;
3688
3689         if (!priv)
3690                 return;
3691
3692         IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
3693
3694         iwl_dbgfs_unregister(priv);
3695         sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
3696
3697         /* ieee80211_unregister_hw call wil cause iwl_mac_stop to
3698          * to be called and iwl_down since we are removing the device
3699          * we need to set STATUS_EXIT_PENDING bit.
3700          */
3701         set_bit(STATUS_EXIT_PENDING, &priv->status);
3702         if (priv->mac80211_registered) {
3703                 ieee80211_unregister_hw(priv->hw);
3704                 priv->mac80211_registered = 0;
3705         } else {
3706                 iwl_down(priv);
3707         }
3708
3709         /* make sure we flush any pending irq or
3710          * tasklet for the driver
3711          */
3712         spin_lock_irqsave(&priv->lock, flags);
3713         iwl_disable_interrupts(priv);
3714         spin_unlock_irqrestore(&priv->lock, flags);
3715
3716         iwl_synchronize_irq(priv);
3717
3718         iwl_rfkill_unregister(priv);
3719         iwl_dealloc_ucode_pci(priv);
3720
3721         if (priv->rxq.bd)
3722                 iwl_rx_queue_free(priv, &priv->rxq);
3723         iwl_hw_txq_ctx_free(priv);
3724
3725         iwl_clear_stations_table(priv);
3726         iwl_eeprom_free(priv);
3727
3728
3729         /*netif_stop_queue(dev); */
3730         flush_workqueue(priv->workqueue);
3731
3732         /* ieee80211_unregister_hw calls iwl_mac_stop, which flushes
3733          * priv->workqueue... so we can't take down the workqueue
3734          * until now... */
3735         destroy_workqueue(priv->workqueue);
3736         priv->workqueue = NULL;
3737
3738         free_irq(priv->pci_dev->irq, priv);
3739         pci_disable_msi(priv->pci_dev);
3740         pci_iounmap(pdev, priv->hw_base);
3741         pci_release_regions(pdev);
3742         pci_disable_device(pdev);
3743         pci_set_drvdata(pdev, NULL);
3744
3745         iwl_uninit_drv(priv);
3746
3747         if (priv->ibss_beacon)
3748                 dev_kfree_skb(priv->ibss_beacon);
3749
3750         ieee80211_free_hw(priv->hw);
3751 }
3752
3753 #ifdef CONFIG_PM
3754
3755 static int iwl_pci_suspend(struct pci_dev *pdev, pm_message_t state)
3756 {
3757         struct iwl_priv *priv = pci_get_drvdata(pdev);
3758
3759         if (priv->is_open) {
3760                 set_bit(STATUS_IN_SUSPEND, &priv->status);
3761                 iwl_mac_stop(priv->hw);
3762                 priv->is_open = 1;
3763         }
3764
3765         pci_save_state(pdev);
3766         pci_disable_device(pdev);
3767         pci_set_power_state(pdev, PCI_D3hot);
3768
3769         return 0;
3770 }
3771
3772 static int iwl_pci_resume(struct pci_dev *pdev)
3773 {
3774         struct iwl_priv *priv = pci_get_drvdata(pdev);
3775         int ret;
3776
3777         pci_set_power_state(pdev, PCI_D0);
3778         ret = pci_enable_device(pdev);
3779         if (ret)
3780                 return ret;
3781         pci_restore_state(pdev);
3782         iwl_enable_interrupts(priv);
3783
3784         if (priv->is_open)
3785                 iwl_mac_start(priv->hw);
3786
3787         clear_bit(STATUS_IN_SUSPEND, &priv->status);
3788         return 0;
3789 }
3790
3791 #endif /* CONFIG_PM */
3792
3793 /*****************************************************************************
3794  *
3795  * driver and module entry point
3796  *
3797  *****************************************************************************/
3798
3799 /* Hardware specific file defines the PCI IDs table for that hardware module */
3800 static struct pci_device_id iwl_hw_card_ids[] = {
3801 #ifdef CONFIG_IWL4965
3802         {IWL_PCI_DEVICE(0x4229, PCI_ANY_ID, iwl4965_agn_cfg)},
3803         {IWL_PCI_DEVICE(0x4230, PCI_ANY_ID, iwl4965_agn_cfg)},
3804 #endif /* CONFIG_IWL4965 */
3805 #ifdef CONFIG_IWL5000
3806         {IWL_PCI_DEVICE(0x4232, 0x1205, iwl5100_bg_cfg)},
3807         {IWL_PCI_DEVICE(0x4232, 0x1305, iwl5100_bg_cfg)},
3808         {IWL_PCI_DEVICE(0x4232, 0x1206, iwl5100_abg_cfg)},
3809         {IWL_PCI_DEVICE(0x4232, 0x1306, iwl5100_abg_cfg)},
3810         {IWL_PCI_DEVICE(0x4232, 0x1326, iwl5100_abg_cfg)},
3811         {IWL_PCI_DEVICE(0x4237, 0x1216, iwl5100_abg_cfg)},
3812         {IWL_PCI_DEVICE(0x4232, PCI_ANY_ID, iwl5100_agn_cfg)},
3813         {IWL_PCI_DEVICE(0x4235, PCI_ANY_ID, iwl5300_agn_cfg)},
3814         {IWL_PCI_DEVICE(0x4236, PCI_ANY_ID, iwl5300_agn_cfg)},
3815         {IWL_PCI_DEVICE(0x4237, PCI_ANY_ID, iwl5100_agn_cfg)},
3816 /* 5350 WiFi/WiMax */
3817         {IWL_PCI_DEVICE(0x423A, 0x1001, iwl5350_agn_cfg)},
3818         {IWL_PCI_DEVICE(0x423A, 0x1021, iwl5350_agn_cfg)},
3819         {IWL_PCI_DEVICE(0x423B, 0x1011, iwl5350_agn_cfg)},
3820 /* 5150 Wifi/WiMax */
3821         {IWL_PCI_DEVICE(0x423C, PCI_ANY_ID, iwl5150_agn_cfg)},
3822         {IWL_PCI_DEVICE(0x423D, PCI_ANY_ID, iwl5150_agn_cfg)},
3823 /* 6000/6050 Series */
3824         {IWL_PCI_DEVICE(0x0082, 0x1102, iwl6000_2ag_cfg)},
3825         {IWL_PCI_DEVICE(0x0085, 0x1112, iwl6000_2ag_cfg)},
3826         {IWL_PCI_DEVICE(0x0082, 0x1122, iwl6000_2ag_cfg)},
3827         {IWL_PCI_DEVICE(0x422B, PCI_ANY_ID, iwl6000_3agn_cfg)},
3828         {IWL_PCI_DEVICE(0x4238, PCI_ANY_ID, iwl6000_3agn_cfg)},
3829         {IWL_PCI_DEVICE(0x0082, PCI_ANY_ID, iwl6000_2agn_cfg)},
3830         {IWL_PCI_DEVICE(0x0085, PCI_ANY_ID, iwl6000_3agn_cfg)},
3831         {IWL_PCI_DEVICE(0x0086, PCI_ANY_ID, iwl6050_3agn_cfg)},
3832         {IWL_PCI_DEVICE(0x0087, PCI_ANY_ID, iwl6050_2agn_cfg)},
3833         {IWL_PCI_DEVICE(0x0088, PCI_ANY_ID, iwl6050_3agn_cfg)},
3834         {IWL_PCI_DEVICE(0x0089, PCI_ANY_ID, iwl6050_2agn_cfg)},
3835 /* 100 Series WiFi */
3836         {IWL_PCI_DEVICE(0x0083, PCI_ANY_ID, iwl100_bgn_cfg)},
3837         {IWL_PCI_DEVICE(0x0084, PCI_ANY_ID, iwl100_bgn_cfg)},
3838 #endif /* CONFIG_IWL5000 */
3839
3840         {0}
3841 };
3842 MODULE_DEVICE_TABLE(pci, iwl_hw_card_ids);
3843
3844 static struct pci_driver iwl_driver = {
3845         .name = DRV_NAME,
3846         .id_table = iwl_hw_card_ids,
3847         .probe = iwl_pci_probe,
3848         .remove = __devexit_p(iwl_pci_remove),
3849 #ifdef CONFIG_PM
3850         .suspend = iwl_pci_suspend,
3851         .resume = iwl_pci_resume,
3852 #endif
3853 };
3854
3855 static int __init iwl_init(void)
3856 {
3857
3858         int ret;
3859         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
3860         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
3861
3862         ret = iwlagn_rate_control_register();
3863         if (ret) {
3864                 printk(KERN_ERR DRV_NAME
3865                        "Unable to register rate control algorithm: %d\n", ret);
3866                 return ret;
3867         }
3868
3869         ret = pci_register_driver(&iwl_driver);
3870         if (ret) {
3871                 printk(KERN_ERR DRV_NAME "Unable to initialize PCI module\n");
3872                 goto error_register;
3873         }
3874
3875         return ret;
3876
3877 error_register:
3878         iwlagn_rate_control_unregister();
3879         return ret;
3880 }
3881
3882 static void __exit iwl_exit(void)
3883 {
3884         pci_unregister_driver(&iwl_driver);
3885         iwlagn_rate_control_unregister();
3886 }
3887
3888 module_exit(iwl_exit);
3889 module_init(iwl_init);