drivers/net/wireless/iwlwifi/iwl-agn.c

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2008 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  * James P. Ketrenos <ipw2100-admin@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 #include "iwl-eeprom.h"
  48 #include "iwl-dev.h"
  49 #include "iwl-core.h"
  50 #include "iwl-io.h"
  51 #include "iwl-helpers.h"
  52 #include "iwl-sta.h"
  53 #include "iwl-calib.h"
  54
  55
  56 /******************************************************************************
  57  *
  58  * module boiler plate
  59  *
  60  ******************************************************************************/
  61
  62 /*
  63  * module name, copyright, version, etc.
  64  * NOTE: DRV_NAME is defined in iwlwifi.h for use by iwl-debug.h and printk
  65  */
  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);
  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
  99 static void iwl_set_rxon_hwcrypto(struct iwl_priv *priv, int hw_decrypt)
 100 {
 101         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
 102
 103         if (hw_decrypt)
 104                 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
 105         else
 106                 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
 107
 108 }
 109
 110 /**
 111  * iwl_check_rxon_cmd - validate RXON structure is valid
 112  *
 113  * NOTE:  This is really only useful during development and can eventually
 114  * be #ifdef'd out once the driver is stable and folks aren't actively
 115  * making changes
 116  */
 117 static int iwl_check_rxon_cmd(struct iwl_rxon_cmd *rxon)
 118 {
 119         int error = 0;
 120         int counter = 1;
 121
 122         if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
 123                 error |= le32_to_cpu(rxon->flags &
 124                                 (RXON_FLG_TGJ_NARROW_BAND_MSK |
 125                                  RXON_FLG_RADAR_DETECT_MSK));
 126                 if (error)
 127                         IWL_WARNING("check 24G fields %d | %d\n",
 128                                     counter++, error);
 129         } else {
 130                 error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ?
 131                                 0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK);
 132                 if (error)
 133                         IWL_WARNING("check 52 fields %d | %d\n",
 134                                     counter++, error);
 135                 error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK);
 136                 if (error)
 137                         IWL_WARNING("check 52 CCK %d | %d\n",
 138                                     counter++, error);
 139         }
 140         error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1;
 141         if (error)
 142                 IWL_WARNING("check mac addr %d | %d\n", counter++, error);
 143
 144         /* make sure basic rates 6Mbps and 1Mbps are supported */
 145         error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) &&
 146                   ((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0));
 147         if (error)
 148                 IWL_WARNING("check basic rate %d | %d\n", counter++, error);
 149
 150         error |= (le16_to_cpu(rxon->assoc_id) > 2007);
 151         if (error)
 152                 IWL_WARNING("check assoc id %d | %d\n", counter++, error);
 153
 154         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
 155                         == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK));
 156         if (error)
 157                 IWL_WARNING("check CCK and short slot %d | %d\n",
 158                             counter++, error);
 159
 160         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
 161                         == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK));
 162         if (error)
 163                 IWL_WARNING("check CCK & auto detect %d | %d\n",
 164                             counter++, error);
 165
 166         error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
 167                         RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK);
 168         if (error)
 169                 IWL_WARNING("check TGG and auto detect %d | %d\n",
 170                             counter++, error);
 171
 172         if (error)
 173                 IWL_WARNING("Tuning to channel %d\n",
 174                             le16_to_cpu(rxon->channel));
 175
 176         if (error) {
 177                 IWL_ERROR("Not a valid iwl_rxon_assoc_cmd field values\n");
 178                 return -1;
 179         }
 180         return 0;
 181 }
 182
 183 /**
 184  * iwl_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
 185  * @priv: staging_rxon is compared to active_rxon
 186  *
 187  * If the RXON structure is changing enough to require a new tune,
 188  * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
 189  * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
 190  */
 191 static int iwl_full_rxon_required(struct iwl_priv *priv)
 192 {
 193
 194         /* These items are only settable from the full RXON command */
 195         if (!(iwl_is_associated(priv)) ||
 196             compare_ether_addr(priv->staging_rxon.bssid_addr,
 197                                priv->active_rxon.bssid_addr) ||
 198             compare_ether_addr(priv->staging_rxon.node_addr,
 199                                priv->active_rxon.node_addr) ||
 200             compare_ether_addr(priv->staging_rxon.wlap_bssid_addr,
 201                                priv->active_rxon.wlap_bssid_addr) ||
 202             (priv->staging_rxon.dev_type != priv->active_rxon.dev_type) ||
 203             (priv->staging_rxon.channel != priv->active_rxon.channel) ||
 204             (priv->staging_rxon.air_propagation !=
 205              priv->active_rxon.air_propagation) ||
 206             (priv->staging_rxon.ofdm_ht_single_stream_basic_rates !=
 207              priv->active_rxon.ofdm_ht_single_stream_basic_rates) ||
 208             (priv->staging_rxon.ofdm_ht_dual_stream_basic_rates !=
 209              priv->active_rxon.ofdm_ht_dual_stream_basic_rates) ||
 210             (priv->staging_rxon.assoc_id != priv->active_rxon.assoc_id))
 211                 return 1;
 212
 213         /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
 214          * be updated with the RXON_ASSOC command -- however only some
 215          * flag transitions are allowed using RXON_ASSOC */
 216
 217         /* Check if we are not switching bands */
 218         if ((priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) !=
 219             (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK))
 220                 return 1;
 221
 222         /* Check if we are switching association toggle */
 223         if ((priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) !=
 224                 (priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK))
 225                 return 1;
 226
 227         return 0;
 228 }
 229
 230 /**
 231  * iwl_commit_rxon - commit staging_rxon to hardware
 232  *
 233  * The RXON command in staging_rxon is committed to the hardware and
 234  * the active_rxon structure is updated with the new data.  This
 235  * function correctly transitions out of the RXON_ASSOC_MSK state if
 236  * a HW tune is required based on the RXON structure changes.
 237  */
 238 static int iwl_commit_rxon(struct iwl_priv *priv)
 239 {
 240         /* cast away the const for active_rxon in this function */
 241         struct iwl_rxon_cmd *active_rxon = (void *)&priv->active_rxon;
 242         int ret;
 243         bool new_assoc =
 244                 !!(priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK);
 245
 246         if (!iwl_is_alive(priv))
 247                 return -EBUSY;
 248
 249         /* always get timestamp with Rx frame */
 250         priv->staging_rxon.flags |= RXON_FLG_TSF2HOST_MSK;
 251         /* allow CTS-to-self if possible. this is relevant only for
 252          * 5000, but will not damage 4965 */
 253         priv->staging_rxon.flags |= RXON_FLG_SELF_CTS_EN;
 254
 255         ret = iwl_check_rxon_cmd(&priv->staging_rxon);
 256         if (ret) {
 257                 IWL_ERROR("Invalid RXON configuration.  Not committing.\n");
 258                 return -EINVAL;
 259         }
 260
 261         /* If we don't need to send a full RXON, we can use
 262          * iwl_rxon_assoc_cmd which is used to reconfigure filter
 263          * and other flags for the current radio configuration. */
 264         if (!iwl_full_rxon_required(priv)) {
 265                 ret = iwl_send_rxon_assoc(priv);
 266                 if (ret) {
 267                         IWL_ERROR("Error setting RXON_ASSOC (%d)\n", ret);
 268                         return ret;
 269                 }
 270
 271                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
 272                 return 0;
 273         }
 274
 275         /* station table will be cleared */
 276         priv->assoc_station_added = 0;
 277
 278         /* If we are currently associated and the new config requires
 279          * an RXON_ASSOC and the new config wants the associated mask enabled,
 280          * we must clear the associated from the active configuration
 281          * before we apply the new config */
 282         if (iwl_is_associated(priv) && new_assoc) {
 283                 IWL_DEBUG_INFO("Toggling associated bit on current RXON\n");
 284                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
 285
 286                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON,
 287                                       sizeof(struct iwl_rxon_cmd),
 288                                       &priv->active_rxon);
 289
 290                 /* If the mask clearing failed then we set
 291                  * active_rxon back to what it was previously */
 292                 if (ret) {
 293                         active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
 294                         IWL_ERROR("Error clearing ASSOC_MSK (%d)\n", ret);
 295                         return ret;
 296                 }
 297         }
 298
 299         IWL_DEBUG_INFO("Sending RXON\n"
 300                        "* with%s RXON_FILTER_ASSOC_MSK\n"
 301                        "* channel = %d\n"
 302                        "* bssid = %pM\n",
 303                        (new_assoc ? "" : "out"),
 304                        le16_to_cpu(priv->staging_rxon.channel),
 305                        priv->staging_rxon.bssid_addr);
 306
 307         iwl_set_rxon_hwcrypto(priv, !priv->hw_params.sw_crypto);
 308
 309         /* Apply the new configuration
 310          * RXON unassoc clears the station table in uCode, send it before
 311          * we add the bcast station. If assoc bit is set, we will send RXON
 312          * after having added the bcast and bssid station.
 313          */
 314         if (!new_assoc) {
 315                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON,
 316                               sizeof(struct iwl_rxon_cmd), &priv->staging_rxon);
 317                 if (ret) {
 318                         IWL_ERROR("Error setting new RXON (%d)\n", ret);
 319                         return ret;
 320                 }
 321                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
 322         }
 323
 324         iwl_clear_stations_table(priv);
 325
 326         if (!priv->error_recovering)
 327                 priv->start_calib = 0;
 328
 329         /* Add the broadcast address so we can send broadcast frames */
 330         if (iwl_rxon_add_station(priv, iwl_bcast_addr, 0) ==
 331                                                 IWL_INVALID_STATION) {
 332                 IWL_ERROR("Error adding BROADCAST address for transmit.\n");
 333                 return -EIO;
 334         }
 335
 336         /* If we have set the ASSOC_MSK and we are in BSS mode then
 337          * add the IWL_AP_ID to the station rate table */
 338         if (new_assoc) {
 339                 if (priv->iw_mode == NL80211_IFTYPE_STATION) {
 340                         ret = iwl_rxon_add_station(priv,
 341                                            priv->active_rxon.bssid_addr, 1);
 342                         if (ret == IWL_INVALID_STATION) {
 343                                 IWL_ERROR("Error adding AP address for TX.\n");
 344                                 return -EIO;
 345                         }
 346                         priv->assoc_station_added = 1;
 347                         if (priv->default_wep_key &&
 348                             iwl_send_static_wepkey_cmd(priv, 0))
 349                                 IWL_ERROR("Could not send WEP static key.\n");
 350                 }
 351
 352                 /* Apply the new configuration
 353                  * RXON assoc doesn't clear the station table in uCode,
 354                  */
 355                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON,
 356                               sizeof(struct iwl_rxon_cmd), &priv->staging_rxon);
 357                 if (ret) {
 358                         IWL_ERROR("Error setting new RXON (%d)\n", ret);
 359                         return ret;
 360                 }
 361                 memcpy(active_rxon, &priv->staging_rxon, sizeof(*active_rxon));
 362         }
 363
 364         iwl_init_sensitivity(priv);
 365
 366         /* If we issue a new RXON command which required a tune then we must
 367          * send a new TXPOWER command or we won't be able to Tx any frames */
 368         ret = iwl_set_tx_power(priv, priv->tx_power_user_lmt, true);
 369         if (ret) {
 370                 IWL_ERROR("Error sending TX power (%d)\n", ret);
 371                 return ret;
 372         }
 373
 374         return 0;
 375 }
 376
 377 void iwl_update_chain_flags(struct iwl_priv *priv)
 378 {
 379
 380         iwl_set_rxon_chain(priv);
 381         iwl_commit_rxon(priv);
 382 }
 383
 384 static int iwl_send_bt_config(struct iwl_priv *priv)
 385 {
 386         struct iwl4965_bt_cmd bt_cmd = {
 387                 .flags = 3,
 388                 .lead_time = 0xAA,
 389                 .max_kill = 1,
 390                 .kill_ack_mask = 0,
 391                 .kill_cts_mask = 0,
 392         };
 393
 394         return iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG,
 395                                 sizeof(struct iwl4965_bt_cmd), &bt_cmd);
 396 }
 397
 398 static void iwl_clear_free_frames(struct iwl_priv *priv)
 399 {
 400         struct list_head *element;
 401
 402         IWL_DEBUG_INFO("%d frames on pre-allocated heap on clear.\n",
 403                        priv->frames_count);
 404
 405         while (!list_empty(&priv->free_frames)) {
 406                 element = priv->free_frames.next;
 407                 list_del(element);
 408                 kfree(list_entry(element, struct iwl_frame, list));
 409                 priv->frames_count--;
 410         }
 411
 412         if (priv->frames_count) {
 413                 IWL_WARNING("%d frames still in use.  Did we lose one?\n",
 414                             priv->frames_count);
 415                 priv->frames_count = 0;
 416         }
 417 }
 418
 419 static struct iwl_frame *iwl_get_free_frame(struct iwl_priv *priv)
 420 {
 421         struct iwl_frame *frame;
 422         struct list_head *element;
 423         if (list_empty(&priv->free_frames)) {
 424                 frame = kzalloc(sizeof(*frame), GFP_KERNEL);
 425                 if (!frame) {
 426                         IWL_ERROR("Could not allocate frame!\n");
 427                         return NULL;
 428                 }
 429
 430                 priv->frames_count++;
 431                 return frame;
 432         }
 433
 434         element = priv->free_frames.next;
 435         list_del(element);
 436         return list_entry(element, struct iwl_frame, list);
 437 }
 438
 439 static void iwl_free_frame(struct iwl_priv *priv, struct iwl_frame *frame)
 440 {
 441         memset(frame, 0, sizeof(*frame));
 442         list_add(&frame->list, &priv->free_frames);
 443 }
 444
 445 static unsigned int iwl_fill_beacon_frame(struct iwl_priv *priv,
 446                                           struct ieee80211_hdr *hdr,
 447                                           const u8 *dest, int left)
 448 {
 449         if (!iwl_is_associated(priv) || !priv->ibss_beacon ||
 450             ((priv->iw_mode != NL80211_IFTYPE_ADHOC) &&
 451              (priv->iw_mode != NL80211_IFTYPE_AP)))
 452                 return 0;
 453
 454         if (priv->ibss_beacon->len > left)
 455                 return 0;
 456
 457         memcpy(hdr, priv->ibss_beacon->data, priv->ibss_beacon->len);
 458
 459         return priv->ibss_beacon->len;
 460 }
 461
 462 static u8 iwl_rate_get_lowest_plcp(struct iwl_priv *priv)
 463 {
 464         int i;
 465         int rate_mask;
 466
 467         /* Set rate mask*/
 468         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)
 469                 rate_mask = priv->active_rate_basic & 0xF;
 470         else
 471                 rate_mask = priv->active_rate_basic & 0xFF0;
 472
 473         /* Find lowest valid rate */
 474         for (i = IWL_RATE_1M_INDEX; i != IWL_RATE_INVALID;
 475                                         i = iwl_rates[i].next_ieee) {
 476                 if (rate_mask & (1 << i))
 477                         return iwl_rates[i].plcp;
 478         }
 479
 480         /* No valid rate was found. Assign the lowest one */
 481         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)
 482                 return IWL_RATE_1M_PLCP;
 483         else
 484                 return IWL_RATE_6M_PLCP;
 485 }
 486
 487 static unsigned int iwl_hw_get_beacon_cmd(struct iwl_priv *priv,
 488                                        struct iwl_frame *frame, u8 rate)
 489 {
 490         struct iwl_tx_beacon_cmd *tx_beacon_cmd;
 491         unsigned int frame_size;
 492
 493         tx_beacon_cmd = &frame->u.beacon;
 494         memset(tx_beacon_cmd, 0, sizeof(*tx_beacon_cmd));
 495
 496         tx_beacon_cmd->tx.sta_id = priv->hw_params.bcast_sta_id;
 497         tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
 498
 499         frame_size = iwl_fill_beacon_frame(priv, tx_beacon_cmd->frame,
 500                                 iwl_bcast_addr,
 501                                 sizeof(frame->u) - sizeof(*tx_beacon_cmd));
 502
 503         BUG_ON(frame_size > MAX_MPDU_SIZE);
 504         tx_beacon_cmd->tx.len = cpu_to_le16((u16)frame_size);
 505
 506         if ((rate == IWL_RATE_1M_PLCP) || (rate >= IWL_RATE_2M_PLCP))
 507                 tx_beacon_cmd->tx.rate_n_flags =
 508                         iwl_hw_set_rate_n_flags(rate, RATE_MCS_CCK_MSK);
 509         else
 510                 tx_beacon_cmd->tx.rate_n_flags =
 511                         iwl_hw_set_rate_n_flags(rate, 0);
 512
 513         tx_beacon_cmd->tx.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK |
 514                                      TX_CMD_FLG_TSF_MSK |
 515                                      TX_CMD_FLG_STA_RATE_MSK;
 516
 517         return sizeof(*tx_beacon_cmd) + frame_size;
 518 }
 519 static int iwl_send_beacon_cmd(struct iwl_priv *priv)
 520 {
 521         struct iwl_frame *frame;
 522         unsigned int frame_size;
 523         int rc;
 524         u8 rate;
 525
 526         frame = iwl_get_free_frame(priv);
 527
 528         if (!frame) {
 529                 IWL_ERROR("Could not obtain free frame buffer for beacon "
 530                           "command.\n");
 531                 return -ENOMEM;
 532         }
 533
 534         rate = iwl_rate_get_lowest_plcp(priv);
 535
 536         frame_size = iwl_hw_get_beacon_cmd(priv, frame, rate);
 537
 538         rc = iwl_send_cmd_pdu(priv, REPLY_TX_BEACON, frame_size,
 539                               &frame->u.cmd[0]);
 540
 541         iwl_free_frame(priv, frame);
 542
 543         return rc;
 544 }
 545
 546 /******************************************************************************
 547  *
 548  * Misc. internal state and helper functions
 549  *
 550  ******************************************************************************/
 551
 552 static void iwl_ht_conf(struct iwl_priv *priv,
 553                             struct ieee80211_bss_conf *bss_conf)
 554 {
 555         struct ieee80211_sta_ht_cap *ht_conf;
 556         struct iwl_ht_info *iwl_conf = &priv->current_ht_config;
 557         struct ieee80211_sta *sta;
 558
 559         IWL_DEBUG_MAC80211("enter: \n");
 560
 561         if (!iwl_conf->is_ht)
 562                 return;
 563
 564
 565         /*
 566          * It is totally wrong to base global information on something
 567          * that is valid only when associated, alas, this driver works
 568          * that way and I don't know how to fix it.
 569          */
 570
 571         rcu_read_lock();
 572         sta = ieee80211_find_sta(priv->hw, priv->bssid);
 573         if (!sta) {
 574                 rcu_read_unlock();
 575                 return;
 576         }
 577         ht_conf = &sta->ht_cap;
 578
 579         if (ht_conf->cap & IEEE80211_HT_CAP_SGI_20)
 580                 iwl_conf->sgf |= HT_SHORT_GI_20MHZ;
 581         if (ht_conf->cap & IEEE80211_HT_CAP_SGI_40)
 582                 iwl_conf->sgf |= HT_SHORT_GI_40MHZ;
 583
 584         iwl_conf->is_green_field = !!(ht_conf->cap & IEEE80211_HT_CAP_GRN_FLD);
 585         iwl_conf->max_amsdu_size =
 586                 !!(ht_conf->cap & IEEE80211_HT_CAP_MAX_AMSDU);
 587
 588         iwl_conf->supported_chan_width =
 589                 !!(ht_conf->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40);
 590
 591         iwl_conf->extension_chan_offset = bss_conf->ht.secondary_channel_offset;
 592         /* If no above or below channel supplied disable FAT channel */
 593         if (iwl_conf->extension_chan_offset != IEEE80211_HT_PARAM_CHA_SEC_ABOVE &&
 594             iwl_conf->extension_chan_offset != IEEE80211_HT_PARAM_CHA_SEC_BELOW) {
 595                 iwl_conf->extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE;
 596                 iwl_conf->supported_chan_width = 0;
 597         }
 598
 599         iwl_conf->sm_ps = (u8)((ht_conf->cap & IEEE80211_HT_CAP_SM_PS) >> 2);
 600
 601         memcpy(&iwl_conf->mcs, &ht_conf->mcs, 16);
 602
 603         iwl_conf->tx_chan_width = bss_conf->ht.width_40_ok;
 604         iwl_conf->ht_protection =
 605                 bss_conf->ht.operation_mode & IEEE80211_HT_OP_MODE_PROTECTION;
 606         iwl_conf->non_GF_STA_present =
 607                 !!(bss_conf->ht.operation_mode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
 608
 609         rcu_read_unlock();
 610
 611         IWL_DEBUG_MAC80211("leave\n");
 612 }
 613
 614 /*
 615  * QoS  support
 616 */
 617 static void iwl_activate_qos(struct iwl_priv *priv, u8 force)
 618 {
 619         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 620                 return;
 621
 622         if (!priv->qos_data.qos_enable)
 623                 return;
 624
 625         priv->qos_data.def_qos_parm.qos_flags = 0;
 626
 627         if (priv->qos_data.qos_cap.q_AP.queue_request &&
 628             !priv->qos_data.qos_cap.q_AP.txop_request)
 629                 priv->qos_data.def_qos_parm.qos_flags |=
 630                         QOS_PARAM_FLG_TXOP_TYPE_MSK;
 631         if (priv->qos_data.qos_active)
 632                 priv->qos_data.def_qos_parm.qos_flags |=
 633                         QOS_PARAM_FLG_UPDATE_EDCA_MSK;
 634
 635         if (priv->current_ht_config.is_ht)
 636                 priv->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
 637
 638         if (force || iwl_is_associated(priv)) {
 639                 IWL_DEBUG_QOS("send QoS cmd with Qos active=%d FLAGS=0x%X\n",
 640                                 priv->qos_data.qos_active,
 641                                 priv->qos_data.def_qos_parm.qos_flags);
 642
 643                 iwl_send_cmd_pdu_async(priv, REPLY_QOS_PARAM,
 644                                        sizeof(struct iwl_qosparam_cmd),
 645                                        &priv->qos_data.def_qos_parm, NULL);
 646         }
 647 }
 648
 649 #define MAX_UCODE_BEACON_INTERVAL       4096
 650
 651 static u16 iwl_adjust_beacon_interval(u16 beacon_val)
 652 {
 653         u16 new_val = 0;
 654         u16 beacon_factor = 0;
 655
 656         beacon_factor = (beacon_val + MAX_UCODE_BEACON_INTERVAL)
 657                                         / MAX_UCODE_BEACON_INTERVAL;
 658         new_val = beacon_val / beacon_factor;
 659
 660         return new_val;
 661 }
 662
 663 static void iwl_setup_rxon_timing(struct iwl_priv *priv)
 664 {
 665         u64 tsf;
 666         s32 interval_tm, rem;
 667         unsigned long flags;
 668         struct ieee80211_conf *conf = NULL;
 669         u16 beacon_int = 0;
 670
 671         conf = ieee80211_get_hw_conf(priv->hw);
 672
 673         spin_lock_irqsave(&priv->lock, flags);
 674         priv->rxon_timing.timestamp = cpu_to_le64(priv->timestamp);
 675         priv->rxon_timing.listen_interval = cpu_to_le16(conf->listen_interval);
 676
 677         if (priv->iw_mode == NL80211_IFTYPE_STATION) {
 678                 beacon_int = iwl_adjust_beacon_interval(priv->beacon_int);
 679                 priv->rxon_timing.atim_window = 0;
 680         } else {
 681                 beacon_int = iwl_adjust_beacon_interval(conf->beacon_int);
 682
 683                 /* TODO: we need to get atim_window from upper stack
 684                  * for now we set to 0 */
 685                 priv->rxon_timing.atim_window = 0;
 686         }
 687
 688         priv->rxon_timing.beacon_interval = cpu_to_le16(beacon_int);
 689
 690         tsf = priv->timestamp; /* tsf is modifed by do_div: copy it */
 691         interval_tm = beacon_int * 1024;
 692         rem = do_div(tsf, interval_tm);
 693         priv->rxon_timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
 694
 695         spin_unlock_irqrestore(&priv->lock, flags);
 696         IWL_DEBUG_ASSOC("beacon interval %d beacon timer %d beacon tim %d\n",
 697                         le16_to_cpu(priv->rxon_timing.beacon_interval),
 698                         le32_to_cpu(priv->rxon_timing.beacon_init_val),
 699                         le16_to_cpu(priv->rxon_timing.atim_window));
 700 }
 701
 702 static void iwl_set_flags_for_band(struct iwl_priv *priv,
 703                                    enum ieee80211_band band)
 704 {
 705         if (band == IEEE80211_BAND_5GHZ) {
 706                 priv->staging_rxon.flags &=
 707                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
 708                       | RXON_FLG_CCK_MSK);
 709                 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
 710         } else {
 711                 /* Copied from iwl_post_associate() */
 712                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
 713                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
 714                 else
 715                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
 716
 717                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
 718                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
 719
 720                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
 721                 priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
 722                 priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
 723         }
 724 }
 725
 726 /*
 727  * initialize rxon structure with default values from eeprom
 728  */
 729 static void iwl_connection_init_rx_config(struct iwl_priv *priv, int mode)
 730 {
 731         const struct iwl_channel_info *ch_info;
 732
 733         memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
 734
 735         switch (mode) {
 736         case NL80211_IFTYPE_AP:
 737                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
 738                 break;
 739
 740         case NL80211_IFTYPE_STATION:
 741                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
 742                 priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
 743                 break;
 744
 745         case NL80211_IFTYPE_ADHOC:
 746                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
 747                 priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
 748                 priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
 749                                                   RXON_FILTER_ACCEPT_GRP_MSK;
 750                 break;
 751
 752         case NL80211_IFTYPE_MONITOR:
 753                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_SNIFFER;
 754                 priv->staging_rxon.filter_flags = RXON_FILTER_PROMISC_MSK |
 755                     RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_ACCEPT_GRP_MSK;
 756                 break;
 757         default:
 758                 IWL_ERROR("Unsupported interface type %d\n", mode);
 759                 break;
 760         }
 761
 762 #if 0
 763         /* TODO:  Figure out when short_preamble would be set and cache from
 764          * that */
 765         if (!hw_to_local(priv->hw)->short_preamble)
 766                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
 767         else
 768                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
 769 #endif
 770
 771         ch_info = iwl_get_channel_info(priv, priv->band,
 772                                        le16_to_cpu(priv->active_rxon.channel));
 773
 774         if (!ch_info)
 775                 ch_info = &priv->channel_info[0];
 776
 777         /*
 778          * in some case A channels are all non IBSS
 779          * in this case force B/G channel
 780          */
 781         if ((priv->iw_mode == NL80211_IFTYPE_ADHOC) &&
 782             !(is_channel_ibss(ch_info)))
 783                 ch_info = &priv->channel_info[0];
 784
 785         priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
 786         priv->band = ch_info->band;
 787
 788         iwl_set_flags_for_band(priv, priv->band);
 789
 790         priv->staging_rxon.ofdm_basic_rates =
 791             (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
 792         priv->staging_rxon.cck_basic_rates =
 793             (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
 794
 795         priv->staging_rxon.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED_MSK |
 796                                         RXON_FLG_CHANNEL_MODE_PURE_40_MSK);
 797         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
 798         memcpy(priv->staging_rxon.wlap_bssid_addr, priv->mac_addr, ETH_ALEN);
 799         priv->staging_rxon.ofdm_ht_single_stream_basic_rates = 0xff;
 800         priv->staging_rxon.ofdm_ht_dual_stream_basic_rates = 0xff;
 801         iwl_set_rxon_chain(priv);
 802 }
 803
 804 static int iwl_set_mode(struct iwl_priv *priv, int mode)
 805 {
 806         iwl_connection_init_rx_config(priv, mode);
 807         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
 808
 809         iwl_clear_stations_table(priv);
 810
 811         /* dont commit rxon if rf-kill is on*/
 812         if (!iwl_is_ready_rf(priv))
 813                 return -EAGAIN;
 814
 815         cancel_delayed_work(&priv->scan_check);
 816         if (iwl_scan_cancel_timeout(priv, 100)) {
 817                 IWL_WARNING("Aborted scan still in progress after 100ms\n");
 818                 IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
 819                 return -EAGAIN;
 820         }
 821
 822         iwl_commit_rxon(priv);
 823
 824         return 0;
 825 }
 826
 827 static void iwl_set_rate(struct iwl_priv *priv)
 828 {
 829         const struct ieee80211_supported_band *hw = NULL;
 830         struct ieee80211_rate *rate;
 831         int i;
 832
 833         hw = iwl_get_hw_mode(priv, priv->band);
 834         if (!hw) {
 835                 IWL_ERROR("Failed to set rate: unable to get hw mode\n");
 836                 return;
 837         }
 838
 839         priv->active_rate = 0;
 840         priv->active_rate_basic = 0;
 841
 842         for (i = 0; i < hw->n_bitrates; i++) {
 843                 rate = &(hw->bitrates[i]);
 844                 if (rate->hw_value < IWL_RATE_COUNT)
 845                         priv->active_rate |= (1 << rate->hw_value);
 846         }
 847
 848         IWL_DEBUG_RATE("Set active_rate = %0x, active_rate_basic = %0x\n",
 849                        priv->active_rate, priv->active_rate_basic);
 850
 851         /*
 852          * If a basic rate is configured, then use it (adding IWL_RATE_1M_MASK)
 853          * otherwise set it to the default of all CCK rates and 6, 12, 24 for
 854          * OFDM
 855          */
 856         if (priv->active_rate_basic & IWL_CCK_BASIC_RATES_MASK)
 857                 priv->staging_rxon.cck_basic_rates =
 858                     ((priv->active_rate_basic &
 859                       IWL_CCK_RATES_MASK) >> IWL_FIRST_CCK_RATE) & 0xF;
 860         else
 861                 priv->staging_rxon.cck_basic_rates =
 862                     (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
 863
 864         if (priv->active_rate_basic & IWL_OFDM_BASIC_RATES_MASK)
 865                 priv->staging_rxon.ofdm_basic_rates =
 866                     ((priv->active_rate_basic &
 867                       (IWL_OFDM_BASIC_RATES_MASK | IWL_RATE_6M_MASK)) >>
 868                       IWL_FIRST_OFDM_RATE) & 0xFF;
 869         else
 870                 priv->staging_rxon.ofdm_basic_rates =
 871                    (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
 872 }
 873
 874 #ifdef CONFIG_IWLAGN_SPECTRUM_MEASUREMENT
 875
 876 #include "iwl-spectrum.h"
 877
 878 #define BEACON_TIME_MASK_LOW    0x00FFFFFF
 879 #define BEACON_TIME_MASK_HIGH   0xFF000000
 880 #define TIME_UNIT               1024
 881
 882 /*
 883  * extended beacon time format
 884  * time in usec will be changed into a 32-bit value in 8:24 format
 885  * the high 1 byte is the beacon counts
 886  * the lower 3 bytes is the time in usec within one beacon interval
 887  */
 888
 889 static u32 iwl_usecs_to_beacons(u32 usec, u32 beacon_interval)
 890 {
 891         u32 quot;
 892         u32 rem;
 893         u32 interval = beacon_interval * 1024;
 894
 895         if (!interval || !usec)
 896                 return 0;
 897
 898         quot = (usec / interval) & (BEACON_TIME_MASK_HIGH >> 24);
 899         rem = (usec % interval) & BEACON_TIME_MASK_LOW;
 900
 901         return (quot << 24) + rem;
 902 }
 903
 904 /* base is usually what we get from ucode with each received frame,
 905  * the same as HW timer counter counting down
 906  */
 907
 908 static __le32 iwl_add_beacon_time(u32 base, u32 addon, u32 beacon_interval)
 909 {
 910         u32 base_low = base & BEACON_TIME_MASK_LOW;
 911         u32 addon_low = addon & BEACON_TIME_MASK_LOW;
 912         u32 interval = beacon_interval * TIME_UNIT;
 913         u32 res = (base & BEACON_TIME_MASK_HIGH) +
 914             (addon & BEACON_TIME_MASK_HIGH);
 915
 916         if (base_low > addon_low)
 917                 res += base_low - addon_low;
 918         else if (base_low < addon_low) {
 919                 res += interval + base_low - addon_low;
 920                 res += (1 << 24);
 921         } else
 922                 res += (1 << 24);
 923
 924         return cpu_to_le32(res);
 925 }
 926
 927 static int iwl_get_measurement(struct iwl_priv *priv,
 928                                struct ieee80211_measurement_params *params,
 929                                u8 type)
 930 {
 931         struct iwl4965_spectrum_cmd spectrum;
 932         struct iwl_rx_packet *res;
 933         struct iwl_host_cmd cmd = {
 934                 .id = REPLY_SPECTRUM_MEASUREMENT_CMD,
 935                 .data = (void *)&spectrum,
 936                 .meta.flags = CMD_WANT_SKB,
 937         };
 938         u32 add_time = le64_to_cpu(params->start_time);
 939         int rc;
 940         int spectrum_resp_status;
 941         int duration = le16_to_cpu(params->duration);
 942
 943         if (iwl_is_associated(priv))
 944                 add_time =
 945                     iwl_usecs_to_beacons(
 946                         le64_to_cpu(params->start_time) - priv->last_tsf,
 947                         le16_to_cpu(priv->rxon_timing.beacon_interval));
 948
 949         memset(&spectrum, 0, sizeof(spectrum));
 950
 951         spectrum.channel_count = cpu_to_le16(1);
 952         spectrum.flags =
 953             RXON_FLG_TSF2HOST_MSK | RXON_FLG_ANT_A_MSK | RXON_FLG_DIS_DIV_MSK;
 954         spectrum.filter_flags = MEASUREMENT_FILTER_FLAG;
 955         cmd.len = sizeof(spectrum);
 956         spectrum.len = cpu_to_le16(cmd.len - sizeof(spectrum.len));
 957
 958         if (iwl_is_associated(priv))
 959                 spectrum.start_time =
 960                     iwl_add_beacon_time(priv->last_beacon_time,
 961                                 add_time,
 962                                 le16_to_cpu(priv->rxon_timing.beacon_interval));
 963         else
 964                 spectrum.start_time = 0;
 965
 966         spectrum.channels[0].duration = cpu_to_le32(duration * TIME_UNIT);
 967         spectrum.channels[0].channel = params->channel;
 968         spectrum.channels[0].type = type;
 969         if (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK)
 970                 spectrum.flags |= RXON_FLG_BAND_24G_MSK |
 971                     RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK;
 972
 973         rc = iwl_send_cmd_sync(priv, &cmd);
 974         if (rc)
 975                 return rc;
 976
 977         res = (struct iwl_rx_packet *)cmd.meta.u.skb->data;
 978         if (res->hdr.flags & IWL_CMD_FAILED_MSK) {
 979                 IWL_ERROR("Bad return from REPLY_RX_ON_ASSOC command\n");
 980                 rc = -EIO;
 981         }
 982
 983         spectrum_resp_status = le16_to_cpu(res->u.spectrum.status);
 984         switch (spectrum_resp_status) {
 985         case 0:         /* Command will be handled */
 986                 if (res->u.spectrum.id != 0xff) {
 987                         IWL_DEBUG_INFO
 988                             ("Replaced existing measurement: %d\n",
 989                              res->u.spectrum.id);
 990                         priv->measurement_status &= ~MEASUREMENT_READY;
 991                 }
 992                 priv->measurement_status |= MEASUREMENT_ACTIVE;
 993                 rc = 0;
 994                 break;
 995
 996         case 1:         /* Command will not be handled */
 997                 rc = -EAGAIN;
 998                 break;
 999         }
1000
1001         dev_kfree_skb_any(cmd.meta.u.skb);
1002
1003         return rc;
1004 }
1005 #endif
1006
1007 /******************************************************************************
1008  *
1009  * Generic RX handler implementations
1010  *
1011  ******************************************************************************/
1012 static void iwl_rx_reply_alive(struct iwl_priv *priv,
1013                                 struct iwl_rx_mem_buffer *rxb)
1014 {
1015         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
1016         struct iwl_alive_resp *palive;
1017         struct delayed_work *pwork;
1018
1019         palive = &pkt->u.alive_frame;
1020
1021         IWL_DEBUG_INFO("Alive ucode status 0x%08X revision "
1022                        "0x%01X 0x%01X\n",
1023                        palive->is_valid, palive->ver_type,
1024                        palive->ver_subtype);
1025
1026         if (palive->ver_subtype == INITIALIZE_SUBTYPE) {
1027                 IWL_DEBUG_INFO("Initialization Alive received.\n");
1028                 memcpy(&priv->card_alive_init,
1029                        &pkt->u.alive_frame,
1030                        sizeof(struct iwl_init_alive_resp));
1031                 pwork = &priv->init_alive_start;
1032         } else {
1033                 IWL_DEBUG_INFO("Runtime Alive received.\n");
1034                 memcpy(&priv->card_alive, &pkt->u.alive_frame,
1035                        sizeof(struct iwl_alive_resp));
1036                 pwork = &priv->alive_start;
1037         }
1038
1039         /* We delay the ALIVE response by 5ms to
1040          * give the HW RF Kill time to activate... */
1041         if (palive->is_valid == UCODE_VALID_OK)
1042                 queue_delayed_work(priv->workqueue, pwork,
1043                                    msecs_to_jiffies(5));
1044         else
1045                 IWL_WARNING("uCode did not respond OK.\n");
1046 }
1047
1048 static void iwl_rx_reply_error(struct iwl_priv *priv,
1049                                    struct iwl_rx_mem_buffer *rxb)
1050 {
1051         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
1052
1053         IWL_ERROR("Error Reply type 0x%08X cmd %s (0x%02X) "
1054                 "seq 0x%04X ser 0x%08X\n",
1055                 le32_to_cpu(pkt->u.err_resp.error_type),
1056                 get_cmd_string(pkt->u.err_resp.cmd_id),
1057                 pkt->u.err_resp.cmd_id,
1058                 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
1059                 le32_to_cpu(pkt->u.err_resp.error_info));
1060 }
1061
1062 #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x
1063
1064 static void iwl_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
1065 {
1066         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
1067         struct iwl_rxon_cmd *rxon = (void *)&priv->active_rxon;
1068         struct iwl4965_csa_notification *csa = &(pkt->u.csa_notif);
1069         IWL_DEBUG_11H("CSA notif: channel %d, status %d\n",
1070                       le16_to_cpu(csa->channel), le32_to_cpu(csa->status));
1071         rxon->channel = csa->channel;
1072         priv->staging_rxon.channel = csa->channel;
1073 }
1074
1075 static void iwl_rx_spectrum_measure_notif(struct iwl_priv *priv,
1076                                           struct iwl_rx_mem_buffer *rxb)
1077 {
1078 #ifdef CONFIG_IWLAGN_SPECTRUM_MEASUREMENT
1079         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
1080         struct iwl4965_spectrum_notification *report = &(pkt->u.spectrum_notif);
1081
1082         if (!report->state) {
1083                 IWL_DEBUG(IWL_DL_11H,
1084                         "Spectrum Measure Notification: Start\n");
1085                 return;
1086         }
1087
1088         memcpy(&priv->measure_report, report, sizeof(*report));
1089         priv->measurement_status |= MEASUREMENT_READY;
1090 #endif
1091 }
1092
1093 static void iwl_rx_pm_sleep_notif(struct iwl_priv *priv,
1094                                       struct iwl_rx_mem_buffer *rxb)
1095 {
1096 #ifdef CONFIG_IWLWIFI_DEBUG
1097         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
1098         struct iwl4965_sleep_notification *sleep = &(pkt->u.sleep_notif);
1099         IWL_DEBUG_RX("sleep mode: %d, src: %d\n",
1100                      sleep->pm_sleep_mode, sleep->pm_wakeup_src);
1101 #endif
1102 }
1103
1104 static void iwl_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
1105                                              struct iwl_rx_mem_buffer *rxb)
1106 {
1107         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
1108         IWL_DEBUG_RADIO("Dumping %d bytes of unhandled "
1109                         "notification for %s:\n",
1110                         le32_to_cpu(pkt->len), get_cmd_string(pkt->hdr.cmd));
1111         iwl_print_hex_dump(priv, IWL_DL_RADIO, pkt->u.raw, le32_to_cpu(pkt->len));
1112 }
1113
1114 static void iwl_bg_beacon_update(struct work_struct *work)
1115 {
1116         struct iwl_priv *priv =
1117                 container_of(work, struct iwl_priv, beacon_update);
1118         struct sk_buff *beacon;
1119
1120         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
1121         beacon = ieee80211_beacon_get(priv->hw, priv->vif);
1122
1123         if (!beacon) {
1124                 IWL_ERROR("update beacon failed\n");
1125                 return;
1126         }
1127
1128         mutex_lock(&priv->mutex);
1129         /* new beacon skb is allocated every time; dispose previous.*/
1130         if (priv->ibss_beacon)
1131                 dev_kfree_skb(priv->ibss_beacon);
1132
1133         priv->ibss_beacon = beacon;
1134         mutex_unlock(&priv->mutex);
1135
1136         iwl_send_beacon_cmd(priv);
1137 }
1138
1139 /**
1140  * iwl_bg_statistics_periodic - Timer callback to queue statistics
1141  *
1142  * This callback is provided in order to send a statistics request.
1143  *
1144  * This timer function is continually reset to execute within
1145  * REG_RECALIB_PERIOD seconds since the last STATISTICS_NOTIFICATION
1146  * was received.  We need to ensure we receive the statistics in order
1147  * to update the temperature used for calibrating the TXPOWER.
1148  */
1149 static void iwl_bg_statistics_periodic(unsigned long data)
1150 {
1151         struct iwl_priv *priv = (struct iwl_priv *)data;
1152
1153         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1154                 return;
1155
1156         /* dont send host command if rf-kill is on */
1157         if (!iwl_is_ready_rf(priv))
1158                 return;
1159
1160         iwl_send_statistics_request(priv, CMD_ASYNC);
1161 }
1162
1163 static void iwl_rx_beacon_notif(struct iwl_priv *priv,
1164                                 struct iwl_rx_mem_buffer *rxb)
1165 {
1166 #ifdef CONFIG_IWLWIFI_DEBUG
1167         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
1168         struct iwl4965_beacon_notif *beacon = &(pkt->u.beacon_status);
1169         u8 rate = iwl_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
1170
1171         IWL_DEBUG_RX("beacon status %x retries %d iss %d "
1172                 "tsf %d %d rate %d\n",
1173                 le32_to_cpu(beacon->beacon_notify_hdr.u.status) & TX_STATUS_MSK,
1174                 beacon->beacon_notify_hdr.failure_frame,
1175                 le32_to_cpu(beacon->ibss_mgr_status),
1176                 le32_to_cpu(beacon->high_tsf),
1177                 le32_to_cpu(beacon->low_tsf), rate);
1178 #endif
1179
1180         if ((priv->iw_mode == NL80211_IFTYPE_AP) &&
1181             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
1182                 queue_work(priv->workqueue, &priv->beacon_update);
1183 }
1184
1185 /* Handle notification from uCode that card's power state is changing
1186  * due to software, hardware, or critical temperature RFKILL */
1187 static void iwl_rx_card_state_notif(struct iwl_priv *priv,
1188                                     struct iwl_rx_mem_buffer *rxb)
1189 {
1190         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
1191         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
1192         unsigned long status = priv->status;
1193
1194         IWL_DEBUG_RF_KILL("Card state received: HW:%s SW:%s\n",
1195                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
1196                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
1197
1198         if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED |
1199                      RF_CARD_DISABLED)) {
1200
1201                 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
1202                             CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
1203
1204                 if (!iwl_grab_nic_access(priv)) {
1205                         iwl_write_direct32(
1206                                 priv, HBUS_TARG_MBX_C,
1207                                 HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
1208
1209                         iwl_release_nic_access(priv);
1210                 }
1211
1212                 if (!(flags & RXON_CARD_DISABLED)) {
1213                         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
1214                                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
1215                         if (!iwl_grab_nic_access(priv)) {
1216                                 iwl_write_direct32(
1217                                         priv, HBUS_TARG_MBX_C,
1218                                         HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
1219
1220                                 iwl_release_nic_access(priv);
1221                         }
1222                 }
1223
1224                 if (flags & RF_CARD_DISABLED) {
1225                         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
1226                                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
1227                         iwl_read32(priv, CSR_UCODE_DRV_GP1);
1228                         if (!iwl_grab_nic_access(priv))
1229                                 iwl_release_nic_access(priv);
1230                 }
1231         }
1232
1233         if (flags & HW_CARD_DISABLED)
1234                 set_bit(STATUS_RF_KILL_HW, &priv->status);
1235         else
1236                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
1237
1238
1239         if (flags & SW_CARD_DISABLED)
1240                 set_bit(STATUS_RF_KILL_SW, &priv->status);
1241         else
1242                 clear_bit(STATUS_RF_KILL_SW, &priv->status);
1243
1244         if (!(flags & RXON_CARD_DISABLED))
1245                 iwl_scan_cancel(priv);
1246
1247         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
1248              test_bit(STATUS_RF_KILL_HW, &priv->status)) ||
1249             (test_bit(STATUS_RF_KILL_SW, &status) !=
1250              test_bit(STATUS_RF_KILL_SW, &priv->status)))
1251                 queue_work(priv->workqueue, &priv->rf_kill);
1252         else
1253                 wake_up_interruptible(&priv->wait_command_queue);
1254 }
1255
1256 int iwl_set_pwr_src(struct iwl_priv *priv, enum iwl_pwr_src src)
1257 {
1258         int ret;
1259         unsigned long flags;
1260
1261         spin_lock_irqsave(&priv->lock, flags);
1262         ret = iwl_grab_nic_access(priv);
1263         if (ret)
1264                 goto err;
1265
1266         if (src == IWL_PWR_SRC_VAUX) {
1267                 u32 val;
1268                 ret = pci_read_config_dword(priv->pci_dev, PCI_CFG_POWER_SOURCE,
1269                                             &val);
1270
1271                 if (val & PCI_CFG_PMC_PME_FROM_D3COLD_SUPPORT)
1272                         iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
1273                                                APMG_PS_CTRL_VAL_PWR_SRC_VAUX,
1274                                                ~APMG_PS_CTRL_MSK_PWR_SRC);
1275         } else {
1276                 iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
1277                                        APMG_PS_CTRL_VAL_PWR_SRC_VMAIN,
1278                                        ~APMG_PS_CTRL_MSK_PWR_SRC);
1279         }
1280
1281         iwl_release_nic_access(priv);
1282 err:
1283         spin_unlock_irqrestore(&priv->lock, flags);
1284         return ret;
1285 }
1286
1287 /**
1288  * iwl_setup_rx_handlers - Initialize Rx handler callbacks
1289  *
1290  * Setup the RX handlers for each of the reply types sent from the uCode
1291  * to the host.
1292  *
1293  * This function chains into the hardware specific files for them to setup
1294  * any hardware specific handlers as well.
1295  */
1296 static void iwl_setup_rx_handlers(struct iwl_priv *priv)
1297 {
1298         priv->rx_handlers[REPLY_ALIVE] = iwl_rx_reply_alive;
1299         priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error;
1300         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
1301         priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
1302             iwl_rx_spectrum_measure_notif;
1303         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif;
1304         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
1305             iwl_rx_pm_debug_statistics_notif;
1306         priv->rx_handlers[BEACON_NOTIFICATION] = iwl_rx_beacon_notif;
1307
1308         /*
1309          * The same handler is used for both the REPLY to a discrete
1310          * statistics request from the host as well as for the periodic
1311          * statistics notifications (after received beacons) from the uCode.
1312          */
1313         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl_rx_statistics;
1314         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl_rx_statistics;
1315
1316         iwl_setup_rx_scan_handlers(priv);
1317
1318         /* status change handler */
1319         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl_rx_card_state_notif;
1320
1321         priv->rx_handlers[MISSED_BEACONS_NOTIFICATION] =
1322             iwl_rx_missed_beacon_notif;
1323         /* Rx handlers */
1324         priv->rx_handlers[REPLY_RX_PHY_CMD] = iwl_rx_reply_rx_phy;
1325         priv->rx_handlers[REPLY_RX_MPDU_CMD] = iwl_rx_reply_rx;
1326         /* block ack */
1327         priv->rx_handlers[REPLY_COMPRESSED_BA] = iwl_rx_reply_compressed_ba;
1328         /* Set up hardware specific Rx handlers */
1329         priv->cfg->ops->lib->rx_handler_setup(priv);
1330 }
1331
1332 /*
1333  * this should be called while priv->lock is locked
1334 */
1335 static void __iwl_rx_replenish(struct iwl_priv *priv)
1336 {
1337         iwl_rx_allocate(priv);
1338         iwl_rx_queue_restock(priv);
1339 }
1340
1341
1342 /**
1343  * iwl_rx_handle - Main entry function for receiving responses from uCode
1344  *
1345  * Uses the priv->rx_handlers callback function array to invoke
1346  * the appropriate handlers, including command responses,
1347  * frame-received notifications, and other notifications.
1348  */
1349 void iwl_rx_handle(struct iwl_priv *priv)
1350 {
1351         struct iwl_rx_mem_buffer *rxb;
1352         struct iwl_rx_packet *pkt;
1353         struct iwl_rx_queue *rxq = &priv->rxq;
1354         u32 r, i;
1355         int reclaim;
1356         unsigned long flags;
1357         u8 fill_rx = 0;
1358         u32 count = 8;
1359
1360         /* uCode's read index (stored in shared DRAM) indicates the last Rx
1361          * buffer that the driver may process (last buffer filled by ucode). */
1362         r = priv->cfg->ops->lib->shared_mem_rx_idx(priv);
1363         i = rxq->read;
1364
1365         /* Rx interrupt, but nothing sent from uCode */
1366         if (i == r)
1367                 IWL_DEBUG(IWL_DL_RX, "r = %d, i = %d\n", r, i);
1368
1369         if (iwl_rx_queue_space(rxq) > (RX_QUEUE_SIZE / 2))
1370                 fill_rx = 1;
1371
1372         while (i != r) {
1373                 rxb = rxq->queue[i];
1374
1375                 /* If an RXB doesn't have a Rx queue slot associated with it,
1376                  * then a bug has been introduced in the queue refilling
1377                  * routines -- catch it here */
1378                 BUG_ON(rxb == NULL);
1379
1380                 rxq->queue[i] = NULL;
1381
1382                 pci_dma_sync_single_for_cpu(priv->pci_dev, rxb->dma_addr,
1383                                             priv->hw_params.rx_buf_size,
1384                                             PCI_DMA_FROMDEVICE);
1385                 pkt = (struct iwl_rx_packet *)rxb->skb->data;
1386
1387                 /* Reclaim a command buffer only if this packet is a response
1388                  *   to a (driver-originated) command.
1389                  * If the packet (e.g. Rx frame) originated from uCode,
1390                  *   there is no command buffer to reclaim.
1391                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
1392                  *   but apparently a few don't get set; catch them here. */
1393                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
1394                         (pkt->hdr.cmd != REPLY_RX_PHY_CMD) &&
1395                         (pkt->hdr.cmd != REPLY_RX) &&
1396                         (pkt->hdr.cmd != REPLY_RX_MPDU_CMD) &&
1397                         (pkt->hdr.cmd != REPLY_COMPRESSED_BA) &&
1398                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
1399                         (pkt->hdr.cmd != REPLY_TX);
1400
1401                 /* Based on type of command response or notification,
1402                  *   handle those that need handling via function in
1403                  *   rx_handlers table.  See iwl_setup_rx_handlers() */
1404                 if (priv->rx_handlers[pkt->hdr.cmd]) {
1405                         IWL_DEBUG(IWL_DL_RX, "r = %d, i = %d, %s, 0x%02x\n", r,
1406                                 i, get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
1407                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
1408                 } else {
1409                         /* No handling needed */
1410                         IWL_DEBUG(IWL_DL_RX,
1411                                 "r %d i %d No handler needed for %s, 0x%02x\n",
1412                                 r, i, get_cmd_string(pkt->hdr.cmd),
1413                                 pkt->hdr.cmd);
1414                 }
1415
1416                 if (reclaim) {
1417                         /* Invoke any callbacks, transfer the skb to caller, and
1418                          * fire off the (possibly) blocking iwl_send_cmd()
1419                          * as we reclaim the driver command queue */
1420                         if (rxb && rxb->skb)
1421                                 iwl_tx_cmd_complete(priv, rxb);
1422                         else
1423                                 IWL_WARNING("Claim null rxb?\n");
1424                 }
1425
1426                 /* For now we just don't re-use anything.  We can tweak this
1427                  * later to try and re-use notification packets and SKBs that
1428                  * fail to Rx correctly */
1429                 if (rxb->skb != NULL) {
1430                         priv->alloc_rxb_skb--;
1431                         dev_kfree_skb_any(rxb->skb);
1432                         rxb->skb = NULL;
1433                 }
1434
1435                 pci_unmap_single(priv->pci_dev, rxb->dma_addr,
1436                                  priv->hw_params.rx_buf_size,
1437                                  PCI_DMA_FROMDEVICE);
1438                 spin_lock_irqsave(&rxq->lock, flags);
1439                 list_add_tail(&rxb->list, &priv->rxq.rx_used);
1440                 spin_unlock_irqrestore(&rxq->lock, flags);
1441                 i = (i + 1) & RX_QUEUE_MASK;
1442                 /* If there are a lot of unused frames,
1443                  * restock the Rx queue so ucode wont assert. */
1444                 if (fill_rx) {
1445                         count++;
1446                         if (count >= 8) {
1447                                 priv->rxq.read = i;
1448                                 __iwl_rx_replenish(priv);
1449                                 count = 0;
1450                         }
1451                 }
1452         }
1453
1454         /* Backtrack one entry */
1455         priv->rxq.read = i;
1456         iwl_rx_queue_restock(priv);
1457 }
1458
1459 #ifdef CONFIG_IWLWIFI_DEBUG
1460 static void iwl_print_rx_config_cmd(struct iwl_priv *priv)
1461 {
1462         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
1463
1464         IWL_DEBUG_RADIO("RX CONFIG:\n");
1465         iwl_print_hex_dump(priv, IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
1466         IWL_DEBUG_RADIO("u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
1467         IWL_DEBUG_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
1468         IWL_DEBUG_RADIO("u32 filter_flags: 0x%08x\n",
1469                         le32_to_cpu(rxon->filter_flags));
1470         IWL_DEBUG_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type);
1471         IWL_DEBUG_RADIO("u8 ofdm_basic_rates: 0x%02x\n",
1472                         rxon->ofdm_basic_rates);
1473         IWL_DEBUG_RADIO("u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
1474         IWL_DEBUG_RADIO("u8[6] node_addr: %pM\n", rxon->node_addr);
1475         IWL_DEBUG_RADIO("u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
1476         IWL_DEBUG_RADIO("u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
1477 }
1478 #endif
1479
1480 static void iwl_enable_interrupts(struct iwl_priv *priv)
1481 {
1482         IWL_DEBUG_ISR("Enabling interrupts\n");
1483         set_bit(STATUS_INT_ENABLED, &priv->status);
1484         iwl_write32(priv, CSR_INT_MASK, CSR_INI_SET_MASK);
1485 }
1486
1487 /* call this function to flush any scheduled tasklet */
1488 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
1489 {
1490         /* wait to make sure we flush pending tasklet*/
1491         synchronize_irq(priv->pci_dev->irq);
1492         tasklet_kill(&priv->irq_tasklet);
1493 }
1494
1495 static inline void iwl_disable_interrupts(struct iwl_priv *priv)
1496 {
1497         clear_bit(STATUS_INT_ENABLED, &priv->status);
1498
1499         /* disable interrupts from uCode/NIC to host */
1500         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
1501
1502         /* acknowledge/clear/reset any interrupts still pending
1503          * from uCode or flow handler (Rx/Tx DMA) */
1504         iwl_write32(priv, CSR_INT, 0xffffffff);
1505         iwl_write32(priv, CSR_FH_INT_STATUS, 0xffffffff);
1506         IWL_DEBUG_ISR("Disabled interrupts\n");
1507 }
1508
1509
1510 /**
1511  * iwl_irq_handle_error - called for HW or SW error interrupt from card
1512  */
1513 static void iwl_irq_handle_error(struct iwl_priv *priv)
1514 {
1515         /* Set the FW error flag -- cleared on iwl_down */
1516         set_bit(STATUS_FW_ERROR, &priv->status);
1517
1518         /* Cancel currently queued command. */
1519         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
1520
1521 #ifdef CONFIG_IWLWIFI_DEBUG
1522         if (priv->debug_level & IWL_DL_FW_ERRORS) {
1523                 iwl_dump_nic_error_log(priv);
1524                 iwl_dump_nic_event_log(priv);
1525                 iwl_print_rx_config_cmd(priv);
1526         }
1527 #endif
1528
1529         wake_up_interruptible(&priv->wait_command_queue);
1530
1531         /* Keep the restart process from trying to send host
1532          * commands by clearing the INIT status bit */
1533         clear_bit(STATUS_READY, &priv->status);
1534
1535         if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1536                 IWL_DEBUG(IWL_DL_FW_ERRORS,
1537                           "Restarting adapter due to uCode error.\n");
1538
1539                 if (iwl_is_associated(priv)) {
1540                         memcpy(&priv->recovery_rxon, &priv->active_rxon,
1541                                sizeof(priv->recovery_rxon));
1542                         priv->error_recovering = 1;
1543                 }
1544                 if (priv->cfg->mod_params->restart_fw)
1545                         queue_work(priv->workqueue, &priv->restart);
1546         }
1547 }
1548
1549 static void iwl_error_recovery(struct iwl_priv *priv)
1550 {
1551         unsigned long flags;
1552
1553         memcpy(&priv->staging_rxon, &priv->recovery_rxon,
1554                sizeof(priv->staging_rxon));
1555         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1556         iwl_commit_rxon(priv);
1557
1558         iwl_rxon_add_station(priv, priv->bssid, 1);
1559
1560         spin_lock_irqsave(&priv->lock, flags);
1561         priv->assoc_id = le16_to_cpu(priv->staging_rxon.assoc_id);
1562         priv->error_recovering = 0;
1563         spin_unlock_irqrestore(&priv->lock, flags);
1564 }
1565
1566 static void iwl_irq_tasklet(struct iwl_priv *priv)
1567 {
1568         u32 inta, handled = 0;
1569         u32 inta_fh;
1570         unsigned long flags;
1571 #ifdef CONFIG_IWLWIFI_DEBUG
1572         u32 inta_mask;
1573 #endif
1574
1575         spin_lock_irqsave(&priv->lock, flags);
1576
1577         /* Ack/clear/reset pending uCode interrupts.
1578          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
1579          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
1580         inta = iwl_read32(priv, CSR_INT);
1581         iwl_write32(priv, CSR_INT, inta);
1582
1583         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
1584          * Any new interrupts that happen after this, either while we're
1585          * in this tasklet, or later, will show up in next ISR/tasklet. */
1586         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1587         iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
1588
1589 #ifdef CONFIG_IWLWIFI_DEBUG
1590         if (priv->debug_level & IWL_DL_ISR) {
1591                 /* just for debug */
1592                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1593                 IWL_DEBUG_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1594                               inta, inta_mask, inta_fh);
1595         }
1596 #endif
1597
1598         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
1599          * atomic, make sure that inta covers all the interrupts that
1600          * we've discovered, even if FH interrupt came in just after
1601          * reading CSR_INT. */
1602         if (inta_fh & CSR49_FH_INT_RX_MASK)
1603                 inta |= CSR_INT_BIT_FH_RX;
1604         if (inta_fh & CSR49_FH_INT_TX_MASK)
1605                 inta |= CSR_INT_BIT_FH_TX;
1606
1607         /* Now service all interrupt bits discovered above. */
1608         if (inta & CSR_INT_BIT_HW_ERR) {
1609                 IWL_ERROR("Microcode HW error detected.  Restarting.\n");
1610
1611                 /* Tell the device to stop sending interrupts */
1612                 iwl_disable_interrupts(priv);
1613
1614                 iwl_irq_handle_error(priv);
1615
1616                 handled |= CSR_INT_BIT_HW_ERR;
1617
1618                 spin_unlock_irqrestore(&priv->lock, flags);
1619
1620                 return;
1621         }
1622
1623 #ifdef CONFIG_IWLWIFI_DEBUG
1624         if (priv->debug_level & (IWL_DL_ISR)) {
1625                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1626                 if (inta & CSR_INT_BIT_SCD)
1627                         IWL_DEBUG_ISR("Scheduler finished to transmit "
1628                                       "the frame/frames.\n");
1629
1630                 /* Alive notification via Rx interrupt will do the real work */
1631                 if (inta & CSR_INT_BIT_ALIVE)
1632                         IWL_DEBUG_ISR("Alive interrupt\n");
1633         }
1634 #endif
1635         /* Safely ignore these bits for debug checks below */
1636         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1637
1638         /* HW RF KILL switch toggled */
1639         if (inta & CSR_INT_BIT_RF_KILL) {
1640                 int hw_rf_kill = 0;
1641                 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
1642                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
1643                         hw_rf_kill = 1;
1644
1645                 IWL_DEBUG(IWL_DL_RF_KILL, "RF_KILL bit toggled to %s.\n",
1646                                 hw_rf_kill ? "disable radio":"enable radio");
1647
1648                 /* driver only loads ucode once setting the interface up.
1649                  * the driver as well won't allow loading if RFKILL is set
1650                  * therefore no need to restart the driver from this handler
1651                  */
1652                 if (!hw_rf_kill && !test_bit(STATUS_ALIVE, &priv->status))
1653                         clear_bit(STATUS_RF_KILL_HW, &priv->status);
1654
1655                 handled |= CSR_INT_BIT_RF_KILL;
1656         }
1657
1658         /* Chip got too hot and stopped itself */
1659         if (inta & CSR_INT_BIT_CT_KILL) {
1660                 IWL_ERROR("Microcode CT kill error detected.\n");
1661                 handled |= CSR_INT_BIT_CT_KILL;
1662         }
1663
1664         /* Error detected by uCode */
1665         if (inta & CSR_INT_BIT_SW_ERR) {
1666                 IWL_ERROR("Microcode SW error detected.  Restarting 0x%X.\n",
1667                           inta);
1668                 iwl_irq_handle_error(priv);
1669                 handled |= CSR_INT_BIT_SW_ERR;
1670         }
1671
1672         /* uCode wakes up after power-down sleep */
1673         if (inta & CSR_INT_BIT_WAKEUP) {
1674                 IWL_DEBUG_ISR("Wakeup interrupt\n");
1675                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
1676                 iwl_txq_update_write_ptr(priv, &priv->txq[0]);
1677                 iwl_txq_update_write_ptr(priv, &priv->txq[1]);
1678                 iwl_txq_update_write_ptr(priv, &priv->txq[2]);
1679                 iwl_txq_update_write_ptr(priv, &priv->txq[3]);
1680                 iwl_txq_update_write_ptr(priv, &priv->txq[4]);
1681                 iwl_txq_update_write_ptr(priv, &priv->txq[5]);
1682
1683                 handled |= CSR_INT_BIT_WAKEUP;
1684         }
1685
1686         /* All uCode command responses, including Tx command responses,
1687          * Rx "responses" (frame-received notification), and other
1688          * notifications from uCode come through here*/
1689         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1690                 iwl_rx_handle(priv);
1691                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1692         }
1693
1694         if (inta & CSR_INT_BIT_FH_TX) {
1695                 IWL_DEBUG_ISR("Tx interrupt\n");
1696                 handled |= CSR_INT_BIT_FH_TX;
1697                 /* FH finished to write, send event */
1698                 priv->ucode_write_complete = 1;
1699                 wake_up_interruptible(&priv->wait_command_queue);
1700         }
1701
1702         if (inta & ~handled)
1703                 IWL_ERROR("Unhandled INTA bits 0x%08x\n", inta & ~handled);
1704
1705         if (inta & ~CSR_INI_SET_MASK) {
1706                 IWL_WARNING("Disabled INTA bits 0x%08x were pending\n",
1707                          inta & ~CSR_INI_SET_MASK);
1708                 IWL_WARNING("   with FH_INT = 0x%08x\n", inta_fh);
1709         }
1710
1711         /* Re-enable all interrupts */
1712         /* only Re-enable if diabled by irq */
1713         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1714                 iwl_enable_interrupts(priv);
1715
1716 #ifdef CONFIG_IWLWIFI_DEBUG
1717         if (priv->debug_level & (IWL_DL_ISR)) {
1718                 inta = iwl_read32(priv, CSR_INT);
1719                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1720                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1721                 IWL_DEBUG_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
1722                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
1723         }
1724 #endif
1725         spin_unlock_irqrestore(&priv->lock, flags);
1726 }
1727
1728 static irqreturn_t iwl_isr(int irq, void *data)
1729 {
1730         struct iwl_priv *priv = data;
1731         u32 inta, inta_mask;
1732         u32 inta_fh;
1733         if (!priv)
1734                 return IRQ_NONE;
1735
1736         spin_lock(&priv->lock);
1737
1738         /* Disable (but don't clear!) interrupts here to avoid
1739          *    back-to-back ISRs and sporadic interrupts from our NIC.
1740          * If we have something to service, the tasklet will re-enable ints.
1741          * If we *don't* have something, we'll re-enable before leaving here. */
1742         inta_mask = iwl_read32(priv, CSR_INT_MASK);  /* just for debug */
1743         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
1744
1745         /* Discover which interrupts are active/pending */
1746         inta = iwl_read32(priv, CSR_INT);
1747         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1748
1749         /* Ignore interrupt if there's nothing in NIC to service.
1750          * This may be due to IRQ shared with another device,
1751          * or due to sporadic interrupts thrown from our NIC. */
1752         if (!inta && !inta_fh) {
1753                 IWL_DEBUG_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n");
1754                 goto none;
1755         }
1756
1757         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
1758                 /* Hardware disappeared. It might have already raised
1759                  * an interrupt */
1760                 IWL_WARNING("HARDWARE GONE?? INTA == 0x%080x\n", inta);
1761                 goto unplugged;
1762         }
1763
1764         IWL_DEBUG_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1765                       inta, inta_mask, inta_fh);
1766
1767         inta &= ~CSR_INT_BIT_SCD;
1768
1769         /* iwl_irq_tasklet() will service interrupts and re-enable them */
1770         if (likely(inta || inta_fh))
1771                 tasklet_schedule(&priv->irq_tasklet);
1772
1773  unplugged:
1774         spin_unlock(&priv->lock);
1775         return IRQ_HANDLED;
1776
1777  none:
1778         /* re-enable interrupts here since we don't have anything to service. */
1779         /* only Re-enable if diabled by irq */
1780         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1781                 iwl_enable_interrupts(priv);
1782         spin_unlock(&priv->lock);
1783         return IRQ_NONE;
1784 }
1785
1786 /******************************************************************************
1787  *
1788  * uCode download functions
1789  *
1790  ******************************************************************************/
1791
1792 static void iwl_dealloc_ucode_pci(struct iwl_priv *priv)
1793 {
1794         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
1795         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
1796         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1797         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
1798         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1799         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
1800 }
1801
1802 static void iwl_nic_start(struct iwl_priv *priv)
1803 {
1804         /* Remove all resets to allow NIC to operate */
1805         iwl_write32(priv, CSR_RESET, 0);
1806 }
1807
1808
1809 /**
1810  * iwl_read_ucode - Read uCode images from disk file.
1811  *
1812  * Copy into buffers for card to fetch via bus-mastering
1813  */
1814 static int iwl_read_ucode(struct iwl_priv *priv)
1815 {
1816         struct iwl_ucode *ucode;
1817         int ret;
1818         const struct firmware *ucode_raw;
1819         const char *name = priv->cfg->fw_name;
1820         u8 *src;
1821         size_t len;
1822         u32 ver, inst_size, data_size, init_size, init_data_size, boot_size;
1823
1824         /* Ask kernel firmware_class module to get the boot firmware off disk.
1825          * request_firmware() is synchronous, file is in memory on return. */
1826         ret = request_firmware(&ucode_raw, name, &priv->pci_dev->dev);
1827         if (ret < 0) {
1828                 IWL_ERROR("%s firmware file req failed: Reason %d\n",
1829                                         name, ret);
1830                 goto error;
1831         }
1832
1833         IWL_DEBUG_INFO("Got firmware '%s' file (%zd bytes) from disk\n",
1834                        name, ucode_raw->size);
1835
1836         /* Make sure that we got at least our header! */
1837         if (ucode_raw->size < sizeof(*ucode)) {
1838                 IWL_ERROR("File size way too small!\n");
1839                 ret = -EINVAL;
1840                 goto err_release;
1841         }
1842
1843         /* Data from ucode file:  header followed by uCode images */
1844         ucode = (void *)ucode_raw->data;
1845
1846         ver = le32_to_cpu(ucode->ver);
1847         inst_size = le32_to_cpu(ucode->inst_size);
1848         data_size = le32_to_cpu(ucode->data_size);
1849         init_size = le32_to_cpu(ucode->init_size);
1850         init_data_size = le32_to_cpu(ucode->init_data_size);
1851         boot_size = le32_to_cpu(ucode->boot_size);
1852
1853         IWL_DEBUG_INFO("f/w package hdr ucode version = 0x%x\n", ver);
1854         IWL_DEBUG_INFO("f/w package hdr runtime inst size = %u\n",
1855                        inst_size);
1856         IWL_DEBUG_INFO("f/w package hdr runtime data size = %u\n",
1857                        data_size);
1858         IWL_DEBUG_INFO("f/w package hdr init inst size = %u\n",
1859                        init_size);
1860         IWL_DEBUG_INFO("f/w package hdr init data size = %u\n",
1861                        init_data_size);
1862         IWL_DEBUG_INFO("f/w package hdr boot inst size = %u\n",
1863                        boot_size);
1864
1865         /* Verify size of file vs. image size info in file's header */
1866         if (ucode_raw->size < sizeof(*ucode) +
1867                 inst_size + data_size + init_size +
1868                 init_data_size + boot_size) {
1869
1870                 IWL_DEBUG_INFO("uCode file size %d too small\n",
1871                                (int)ucode_raw->size);
1872                 ret = -EINVAL;
1873                 goto err_release;
1874         }
1875
1876         /* Verify that uCode images will fit in card's SRAM */
1877         if (inst_size > priv->hw_params.max_inst_size) {
1878                 IWL_DEBUG_INFO("uCode instr len %d too large to fit in\n",
1879                                inst_size);
1880                 ret = -EINVAL;
1881                 goto err_release;
1882         }
1883
1884         if (data_size > priv->hw_params.max_data_size) {
1885                 IWL_DEBUG_INFO("uCode data len %d too large to fit in\n",
1886                                 data_size);
1887                 ret = -EINVAL;
1888                 goto err_release;
1889         }
1890         if (init_size > priv->hw_params.max_inst_size) {
1891                 IWL_DEBUG_INFO
1892                     ("uCode init instr len %d too large to fit in\n",
1893                       init_size);
1894                 ret = -EINVAL;
1895                 goto err_release;
1896         }
1897         if (init_data_size > priv->hw_params.max_data_size) {
1898                 IWL_DEBUG_INFO
1899                     ("uCode init data len %d too large to fit in\n",
1900                       init_data_size);
1901                 ret = -EINVAL;
1902                 goto err_release;
1903         }
1904         if (boot_size > priv->hw_params.max_bsm_size) {
1905                 IWL_DEBUG_INFO
1906                     ("uCode boot instr len %d too large to fit in\n",
1907                       boot_size);
1908                 ret = -EINVAL;
1909                 goto err_release;
1910         }
1911
1912         /* Allocate ucode buffers for card's bus-master loading ... */
1913
1914         /* Runtime instructions and 2 copies of data:
1915          * 1) unmodified from disk
1916          * 2) backup cache for save/restore during power-downs */
1917         priv->ucode_code.len = inst_size;
1918         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
1919
1920         priv->ucode_data.len = data_size;
1921         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
1922
1923         priv->ucode_data_backup.len = data_size;
1924         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1925
1926         /* Initialization instructions and data */
1927         if (init_size && init_data_size) {
1928                 priv->ucode_init.len = init_size;
1929                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
1930
1931                 priv->ucode_init_data.len = init_data_size;
1932                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1933
1934                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
1935                         goto err_pci_alloc;
1936         }
1937
1938         /* Bootstrap (instructions only, no data) */
1939         if (boot_size) {
1940                 priv->ucode_boot.len = boot_size;
1941                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
1942
1943                 if (!priv->ucode_boot.v_addr)
1944                         goto err_pci_alloc;
1945         }
1946
1947         /* Copy images into buffers for card's bus-master reads ... */
1948
1949         /* Runtime instructions (first block of data in file) */
1950         src = &ucode->data[0];
1951         len = priv->ucode_code.len;
1952         IWL_DEBUG_INFO("Copying (but not loading) uCode instr len %Zd\n", len);
1953         memcpy(priv->ucode_code.v_addr, src, len);
1954         IWL_DEBUG_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
1955                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
1956
1957         /* Runtime data (2nd block)
1958          * NOTE:  Copy into backup buffer will be done in iwl_up()  */
1959         src = &ucode->data[inst_size];
1960         len = priv->ucode_data.len;
1961         IWL_DEBUG_INFO("Copying (but not loading) uCode data len %Zd\n", len);
1962         memcpy(priv->ucode_data.v_addr, src, len);
1963         memcpy(priv->ucode_data_backup.v_addr, src, len);
1964
1965         /* Initialization instructions (3rd block) */
1966         if (init_size) {
1967                 src = &ucode->data[inst_size + data_size];
1968                 len = priv->ucode_init.len;
1969                 IWL_DEBUG_INFO("Copying (but not loading) init instr len %Zd\n",
1970                                 len);
1971                 memcpy(priv->ucode_init.v_addr, src, len);
1972         }
1973
1974         /* Initialization data (4th block) */
1975         if (init_data_size) {
1976                 src = &ucode->data[inst_size + data_size + init_size];
1977                 len = priv->ucode_init_data.len;
1978                 IWL_DEBUG_INFO("Copying (but not loading) init data len %Zd\n",
1979                                len);
1980                 memcpy(priv->ucode_init_data.v_addr, src, len);
1981         }
1982
1983         /* Bootstrap instructions (5th block) */
1984         src = &ucode->data[inst_size + data_size + init_size + init_data_size];
1985         len = priv->ucode_boot.len;
1986         IWL_DEBUG_INFO("Copying (but not loading) boot instr len %Zd\n", len);
1987         memcpy(priv->ucode_boot.v_addr, src, len);
1988
1989         /* We have our copies now, allow OS release its copies */
1990         release_firmware(ucode_raw);
1991         return 0;
1992
1993  err_pci_alloc:
1994         IWL_ERROR("failed to allocate pci memory\n");
1995         ret = -ENOMEM;
1996         iwl_dealloc_ucode_pci(priv);
1997
1998  err_release:
1999         release_firmware(ucode_raw);
2000
2001  error:
2002         return ret;
2003 }
2004
2005 /**
2006  * iwl_alive_start - called after REPLY_ALIVE notification received
2007  *                   from protocol/runtime uCode (initialization uCode's
2008  *                   Alive gets handled by iwl_init_alive_start()).
2009  */
2010 static void iwl_alive_start(struct iwl_priv *priv)
2011 {
2012         int ret = 0;
2013
2014         IWL_DEBUG_INFO("Runtime Alive received.\n");
2015
2016         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
2017                 /* We had an error bringing up the hardware, so take it
2018                  * all the way back down so we can try again */
2019                 IWL_DEBUG_INFO("Alive failed.\n");
2020                 goto restart;
2021         }
2022
2023         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
2024          * This is a paranoid check, because we would not have gotten the
2025          * "runtime" alive if code weren't properly loaded.  */
2026         if (iwl_verify_ucode(priv)) {
2027                 /* Runtime instruction load was bad;
2028                  * take it all the way back down so we can try again */
2029                 IWL_DEBUG_INFO("Bad runtime uCode load.\n");
2030                 goto restart;
2031         }
2032
2033         iwl_clear_stations_table(priv);
2034         ret = priv->cfg->ops->lib->alive_notify(priv);
2035         if (ret) {
2036                 IWL_WARNING("Could not complete ALIVE transition [ntf]: %d\n",
2037                             ret);
2038                 goto restart;
2039         }
2040
2041         /* After the ALIVE response, we can send host commands to the uCode */
2042         set_bit(STATUS_ALIVE, &priv->status);
2043
2044         if (iwl_is_rfkill(priv))
2045                 return;
2046
2047         ieee80211_wake_queues(priv->hw);
2048
2049         priv->active_rate = priv->rates_mask;
2050         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
2051
2052         if (iwl_is_associated(priv)) {
2053                 struct iwl_rxon_cmd *active_rxon =
2054                                 (struct iwl_rxon_cmd *)&priv->active_rxon;
2055
2056                 memcpy(&priv->staging_rxon, &priv->active_rxon,
2057                        sizeof(priv->staging_rxon));
2058                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2059         } else {
2060                 /* Initialize our rx_config data */
2061                 iwl_connection_init_rx_config(priv, priv->iw_mode);
2062                 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2063         }
2064
2065         /* Configure Bluetooth device coexistence support */
2066         iwl_send_bt_config(priv);
2067
2068         iwl_reset_run_time_calib(priv);
2069
2070         /* Configure the adapter for unassociated operation */
2071         iwl_commit_rxon(priv);
2072
2073         /* At this point, the NIC is initialized and operational */
2074         iwl_rf_kill_ct_config(priv);
2075
2076         iwl_leds_register(priv);
2077
2078         IWL_DEBUG_INFO("ALIVE processing complete.\n");
2079         set_bit(STATUS_READY, &priv->status);
2080         wake_up_interruptible(&priv->wait_command_queue);
2081
2082         if (priv->error_recovering)
2083                 iwl_error_recovery(priv);
2084
2085         iwl_power_update_mode(priv, 1);
2086
2087         if (test_and_clear_bit(STATUS_MODE_PENDING, &priv->status))
2088                 iwl_set_mode(priv, priv->iw_mode);
2089
2090         return;
2091
2092  restart:
2093         queue_work(priv->workqueue, &priv->restart);
2094 }
2095
2096 static void iwl_cancel_deferred_work(struct iwl_priv *priv);
2097
2098 static void __iwl_down(struct iwl_priv *priv)
2099 {
2100         unsigned long flags;
2101         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
2102
2103         IWL_DEBUG_INFO(DRV_NAME " is going down\n");
2104
2105         if (!exit_pending)
2106                 set_bit(STATUS_EXIT_PENDING, &priv->status);
2107
2108         iwl_leds_unregister(priv);
2109
2110         iwl_clear_stations_table(priv);
2111
2112         /* Unblock any waiting calls */
2113         wake_up_interruptible_all(&priv->wait_command_queue);
2114
2115         /* Wipe out the EXIT_PENDING status bit if we are not actually
2116          * exiting the module */
2117         if (!exit_pending)
2118                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
2119
2120         /* stop and reset the on-board processor */
2121         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
2122
2123         /* tell the device to stop sending interrupts */
2124         spin_lock_irqsave(&priv->lock, flags);
2125         iwl_disable_interrupts(priv);
2126         spin_unlock_irqrestore(&priv->lock, flags);
2127         iwl_synchronize_irq(priv);
2128
2129         if (priv->mac80211_registered)
2130                 ieee80211_stop_queues(priv->hw);
2131
2132         /* If we have not previously called iwl_init() then
2133          * clear all bits but the RF Kill and SUSPEND bits and return */
2134         if (!iwl_is_init(priv)) {
2135                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2136                                         STATUS_RF_KILL_HW |
2137                                test_bit(STATUS_RF_KILL_SW, &priv->status) <<
2138                                         STATUS_RF_KILL_SW |
2139                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2140                                         STATUS_GEO_CONFIGURED |
2141                                test_bit(STATUS_IN_SUSPEND, &priv->status) <<
2142                                         STATUS_IN_SUSPEND |
2143                                test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2144                                         STATUS_EXIT_PENDING;
2145                 goto exit;
2146         }
2147
2148         /* ...otherwise clear out all the status bits but the RF Kill and
2149          * SUSPEND bits and continue taking the NIC down. */
2150         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2151                                 STATUS_RF_KILL_HW |
2152                         test_bit(STATUS_RF_KILL_SW, &priv->status) <<
2153                                 STATUS_RF_KILL_SW |
2154                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2155                                 STATUS_GEO_CONFIGURED |
2156                         test_bit(STATUS_IN_SUSPEND, &priv->status) <<
2157                                 STATUS_IN_SUSPEND |
2158                         test_bit(STATUS_FW_ERROR, &priv->status) <<
2159                                 STATUS_FW_ERROR |
2160                        test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2161                                 STATUS_EXIT_PENDING;
2162
2163         spin_lock_irqsave(&priv->lock, flags);
2164         iwl_clear_bit(priv, CSR_GP_CNTRL,
2165                          CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
2166         spin_unlock_irqrestore(&priv->lock, flags);
2167
2168         iwl_txq_ctx_stop(priv);
2169         iwl_rxq_stop(priv);
2170
2171         spin_lock_irqsave(&priv->lock, flags);
2172         if (!iwl_grab_nic_access(priv)) {
2173                 iwl_write_prph(priv, APMG_CLK_DIS_REG,
2174                                          APMG_CLK_VAL_DMA_CLK_RQT);
2175                 iwl_release_nic_access(priv);
2176         }
2177         spin_unlock_irqrestore(&priv->lock, flags);
2178
2179         udelay(5);
2180
2181         /* FIXME: apm_ops.suspend(priv) */
2182         if (exit_pending || test_bit(STATUS_IN_SUSPEND, &priv->status))
2183                 priv->cfg->ops->lib->apm_ops.stop(priv);
2184         else
2185                 priv->cfg->ops->lib->apm_ops.reset(priv);
2186         priv->cfg->ops->lib->free_shared_mem(priv);
2187
2188  exit:
2189         memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
2190
2191         if (priv->ibss_beacon)
2192                 dev_kfree_skb(priv->ibss_beacon);
2193         priv->ibss_beacon = NULL;
2194
2195         /* clear out any free frames */
2196         iwl_clear_free_frames(priv);
2197 }
2198
2199 static void iwl_down(struct iwl_priv *priv)
2200 {
2201         mutex_lock(&priv->mutex);
2202         __iwl_down(priv);
2203         mutex_unlock(&priv->mutex);
2204
2205         iwl_cancel_deferred_work(priv);
2206 }
2207
2208 #define MAX_HW_RESTARTS 5
2209
2210 static int __iwl_up(struct iwl_priv *priv)
2211 {
2212         int i;
2213         int ret;
2214
2215         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2216                 IWL_WARNING("Exit pending; will not bring the NIC up\n");
2217                 return -EIO;
2218         }
2219
2220         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
2221                 IWL_ERROR("ucode not available for device bringup\n");
2222                 return -EIO;
2223         }
2224
2225         /* If platform's RF_KILL switch is NOT set to KILL */
2226         if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
2227                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2228         else
2229                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2230
2231         if (iwl_is_rfkill(priv)) {
2232                 iwl_enable_interrupts(priv);
2233                 IWL_WARNING("Radio disabled by %s RF Kill switch\n",
2234                     test_bit(STATUS_RF_KILL_HW, &priv->status) ? "HW" : "SW");
2235                 return 0;
2236         }
2237
2238         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2239
2240         ret = priv->cfg->ops->lib->alloc_shared_mem(priv);
2241         if (ret) {
2242                 IWL_ERROR("Unable to allocate shared memory\n");
2243                 return ret;
2244         }
2245
2246         ret = iwl_hw_nic_init(priv);
2247         if (ret) {
2248                 IWL_ERROR("Unable to init nic\n");
2249                 return ret;
2250         }
2251
2252         /* make sure rfkill handshake bits are cleared */
2253         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2254         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
2255                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
2256
2257         /* clear (again), then enable host interrupts */
2258         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2259         iwl_enable_interrupts(priv);
2260
2261         /* really make sure rfkill handshake bits are cleared */
2262         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2263         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2264
2265         /* Copy original ucode data image from disk into backup cache.
2266          * This will be used to initialize the on-board processor's
2267          * data SRAM for a clean start when the runtime program first loads. */
2268         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
2269                priv->ucode_data.len);
2270
2271         for (i = 0; i < MAX_HW_RESTARTS; i++) {
2272
2273                 iwl_clear_stations_table(priv);
2274
2275                 /* load bootstrap state machine,
2276                  * load bootstrap program into processor's memory,
2277                  * prepare to load the "initialize" uCode */
2278                 ret = priv->cfg->ops->lib->load_ucode(priv);
2279
2280                 if (ret) {
2281                         IWL_ERROR("Unable to set up bootstrap uCode: %d\n", ret);
2282                         continue;
2283                 }
2284
2285                 /* Clear out the uCode error bit if it is set */
2286                 clear_bit(STATUS_FW_ERROR, &priv->status);
2287
2288                 /* start card; "initialize" will load runtime ucode */
2289                 iwl_nic_start(priv);
2290
2291                 IWL_DEBUG_INFO(DRV_NAME " is coming up\n");
2292
2293                 return 0;
2294         }
2295
2296         set_bit(STATUS_EXIT_PENDING, &priv->status);
2297         __iwl_down(priv);
2298         clear_bit(STATUS_EXIT_PENDING, &priv->status);
2299
2300         /* tried to restart and config the device for as long as our
2301          * patience could withstand */
2302         IWL_ERROR("Unable to initialize device after %d attempts.\n", i);
2303         return -EIO;
2304 }
2305
2306
2307 /*****************************************************************************
2308  *
2309  * Workqueue callbacks
2310  *
2311  *****************************************************************************/
2312
2313 static void iwl_bg_init_alive_start(struct work_struct *data)
2314 {
2315         struct iwl_priv *priv =
2316             container_of(data, struct iwl_priv, init_alive_start.work);
2317
2318         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2319                 return;
2320
2321         mutex_lock(&priv->mutex);
2322         priv->cfg->ops->lib->init_alive_start(priv);
2323         mutex_unlock(&priv->mutex);
2324 }
2325
2326 static void iwl_bg_alive_start(struct work_struct *data)
2327 {
2328         struct iwl_priv *priv =
2329             container_of(data, struct iwl_priv, alive_start.work);
2330
2331         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2332                 return;
2333
2334         mutex_lock(&priv->mutex);
2335         iwl_alive_start(priv);
2336         mutex_unlock(&priv->mutex);
2337         ieee80211_notify_mac(priv->hw, IEEE80211_NOTIFY_RE_ASSOC);
2338 }
2339
2340 static void iwl_bg_rf_kill(struct work_struct *work)
2341 {
2342         struct iwl_priv *priv = container_of(work, struct iwl_priv, rf_kill);
2343
2344         wake_up_interruptible(&priv->wait_command_queue);
2345
2346         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2347                 return;
2348
2349         mutex_lock(&priv->mutex);
2350
2351         if (!iwl_is_rfkill(priv)) {
2352                 IWL_DEBUG(IWL_DL_RF_KILL,
2353                           "HW and/or SW RF Kill no longer active, restarting "
2354                           "device\n");
2355                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
2356                         queue_work(priv->workqueue, &priv->restart);
2357         } else {
2358                 /* make sure mac80211 stop sending Tx frame */
2359                 if (priv->mac80211_registered)
2360                         ieee80211_stop_queues(priv->hw);
2361
2362                 if (!test_bit(STATUS_RF_KILL_HW, &priv->status))
2363                         IWL_DEBUG_RF_KILL("Can not turn radio back on - "
2364                                           "disabled by SW switch\n");
2365                 else
2366                         IWL_WARNING("Radio Frequency Kill Switch is On:\n"
2367                                     "Kill switch must be turned off for "
2368                                     "wireless networking to work.\n");
2369         }
2370         mutex_unlock(&priv->mutex);
2371         iwl_rfkill_set_hw_state(priv);
2372 }
2373
2374 static void iwl_bg_set_monitor(struct work_struct *work)
2375 {
2376         struct iwl_priv *priv = container_of(work,
2377                                 struct iwl_priv, set_monitor);
2378         int ret;
2379
2380         IWL_DEBUG(IWL_DL_STATE, "setting monitor mode\n");
2381
2382         mutex_lock(&priv->mutex);
2383
2384         ret = iwl_set_mode(priv, NL80211_IFTYPE_MONITOR);
2385         if (ret) {
2386                 if (ret == -EAGAIN)
2387                         IWL_DEBUG(IWL_DL_STATE, "leave - not ready\n");
2388                 else
2389                         IWL_ERROR("iwl_set_mode() failed ret = %d\n", ret);
2390         }
2391
2392         mutex_unlock(&priv->mutex);
2393         ieee80211_notify_mac(priv->hw, IEEE80211_NOTIFY_RE_ASSOC);
2394 }
2395
2396 static void iwl_bg_run_time_calib_work(struct work_struct *work)
2397 {
2398         struct iwl_priv *priv = container_of(work, struct iwl_priv,
2399                         run_time_calib_work);
2400
2401         mutex_lock(&priv->mutex);
2402
2403         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
2404             test_bit(STATUS_SCANNING, &priv->status)) {
2405                 mutex_unlock(&priv->mutex);
2406                 return;
2407         }
2408
2409         if (priv->start_calib) {
2410                 iwl_chain_noise_calibration(priv, &priv->statistics);
2411
2412                 iwl_sensitivity_calibration(priv, &priv->statistics);
2413         }
2414
2415         mutex_unlock(&priv->mutex);
2416         return;
2417 }
2418
2419 static void iwl_bg_up(struct work_struct *data)
2420 {
2421         struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
2422
2423         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2424                 return;
2425
2426         mutex_lock(&priv->mutex);
2427         __iwl_up(priv);
2428         mutex_unlock(&priv->mutex);
2429         iwl_rfkill_set_hw_state(priv);
2430 }
2431
2432 static void iwl_bg_restart(struct work_struct *data)
2433 {
2434         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
2435
2436         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2437                 return;
2438
2439         iwl_down(priv);
2440         queue_work(priv->workqueue, &priv->up);
2441 }
2442
2443 static void iwl_bg_rx_replenish(struct work_struct *data)
2444 {
2445         struct iwl_priv *priv =
2446             container_of(data, struct iwl_priv, rx_replenish);
2447
2448         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2449                 return;
2450
2451         mutex_lock(&priv->mutex);
2452         iwl_rx_replenish(priv);
2453         mutex_unlock(&priv->mutex);
2454 }
2455
2456 #define IWL_DELAY_NEXT_SCAN (HZ*2)
2457
2458 static void iwl_post_associate(struct iwl_priv *priv)
2459 {
2460         struct ieee80211_conf *conf = NULL;
2461         int ret = 0;
2462         unsigned long flags;
2463
2464         if (priv->iw_mode == NL80211_IFTYPE_AP) {
2465                 IWL_ERROR("%s Should not be called in AP mode\n", __func__);
2466                 return;
2467         }
2468
2469         IWL_DEBUG_ASSOC("Associated as %d to: %pM\n",
2470                         priv->assoc_id, priv->active_rxon.bssid_addr);
2471
2472
2473         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2474                 return;
2475
2476
2477         if (!priv->vif || !priv->is_open)
2478                 return;
2479
2480         iwl_power_cancel_timeout(priv);
2481         iwl_scan_cancel_timeout(priv, 200);
2482
2483         conf = ieee80211_get_hw_conf(priv->hw);
2484
2485         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2486         iwl_commit_rxon(priv);
2487
2488         iwl_setup_rxon_timing(priv);
2489         ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
2490                               sizeof(priv->rxon_timing), &priv->rxon_timing);
2491         if (ret)
2492                 IWL_WARNING("REPLY_RXON_TIMING failed - "
2493                             "Attempting to continue.\n");
2494
2495         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2496
2497         iwl_set_rxon_ht(priv, &priv->current_ht_config);
2498
2499         iwl_set_rxon_chain(priv);
2500         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
2501
2502         IWL_DEBUG_ASSOC("assoc id %d beacon interval %d\n",
2503                         priv->assoc_id, priv->beacon_int);
2504
2505         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
2506                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2507         else
2508                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2509
2510         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
2511                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
2512                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2513                 else
2514                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2515
2516                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
2517                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2518
2519         }
2520
2521         iwl_commit_rxon(priv);
2522
2523         switch (priv->iw_mode) {
2524         case NL80211_IFTYPE_STATION:
2525                 break;
2526
2527         case NL80211_IFTYPE_ADHOC:
2528
2529                 /* assume default assoc id */
2530                 priv->assoc_id = 1;
2531
2532                 iwl_rxon_add_station(priv, priv->bssid, 0);
2533                 iwl_send_beacon_cmd(priv);
2534
2535                 break;
2536
2537         default:
2538                 IWL_ERROR("%s Should not be called in %d mode\n",
2539                           __func__, priv->iw_mode);
2540                 break;
2541         }
2542
2543         if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
2544                 priv->assoc_station_added = 1;
2545
2546         spin_lock_irqsave(&priv->lock, flags);
2547         iwl_activate_qos(priv, 0);
2548         spin_unlock_irqrestore(&priv->lock, flags);
2549
2550         /* the chain noise calibration will enabled PM upon completion
2551          * If chain noise has already been run, then we need to enable
2552          * power management here */
2553         if (priv->chain_noise_data.state == IWL_CHAIN_NOISE_DONE)
2554                 iwl_power_enable_management(priv);
2555
2556         /* Enable Rx differential gain and sensitivity calibrations */
2557         iwl_chain_noise_reset(priv);
2558         priv->start_calib = 1;
2559
2560 }
2561
2562 /*****************************************************************************
2563  *
2564  * mac80211 entry point functions
2565  *
2566  *****************************************************************************/
2567
2568 #define UCODE_READY_TIMEOUT     (4 * HZ)
2569
2570 static int iwl_mac_start(struct ieee80211_hw *hw)
2571 {
2572         struct iwl_priv *priv = hw->priv;
2573         int ret;
2574         u16 pci_cmd;
2575
2576         IWL_DEBUG_MAC80211("enter\n");
2577
2578         if (pci_enable_device(priv->pci_dev)) {
2579                 IWL_ERROR("Fail to pci_enable_device\n");
2580                 return -ENODEV;
2581         }
2582         pci_restore_state(priv->pci_dev);
2583         pci_enable_msi(priv->pci_dev);
2584
2585         /* enable interrupts if needed: hw bug w/a */
2586         pci_read_config_word(priv->pci_dev, PCI_COMMAND, &pci_cmd);
2587         if (pci_cmd & PCI_COMMAND_INTX_DISABLE) {
2588                 pci_cmd &= ~PCI_COMMAND_INTX_DISABLE;
2589                 pci_write_config_word(priv->pci_dev, PCI_COMMAND, pci_cmd);
2590         }
2591
2592         ret = request_irq(priv->pci_dev->irq, iwl_isr, IRQF_SHARED,
2593                           DRV_NAME, priv);
2594         if (ret) {
2595                 IWL_ERROR("Error allocating IRQ %d\n", priv->pci_dev->irq);
2596                 goto out_disable_msi;
2597         }
2598
2599         /* we should be verifying the device is ready to be opened */
2600         mutex_lock(&priv->mutex);
2601
2602         memset(&priv->staging_rxon, 0, sizeof(struct iwl_rxon_cmd));
2603         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
2604          * ucode filename and max sizes are card-specific. */
2605
2606         if (!priv->ucode_code.len) {
2607                 ret = iwl_read_ucode(priv);
2608                 if (ret) {
2609                         IWL_ERROR("Could not read microcode: %d\n", ret);
2610                         mutex_unlock(&priv->mutex);
2611                         goto out_release_irq;
2612                 }
2613         }
2614
2615         ret = __iwl_up(priv);
2616
2617         mutex_unlock(&priv->mutex);
2618
2619         iwl_rfkill_set_hw_state(priv);
2620
2621         if (ret)
2622                 goto out_release_irq;
2623
2624         if (iwl_is_rfkill(priv))
2625                 goto out;
2626
2627         IWL_DEBUG_INFO("Start UP work done.\n");
2628
2629         if (test_bit(STATUS_IN_SUSPEND, &priv->status))
2630                 return 0;
2631
2632         /* Wait for START_ALIVE from Run Time ucode. Otherwise callbacks from
2633          * mac80211 will not be run successfully. */
2634         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
2635                         test_bit(STATUS_READY, &priv->status),
2636                         UCODE_READY_TIMEOUT);
2637         if (!ret) {
2638                 if (!test_bit(STATUS_READY, &priv->status)) {
2639                         IWL_ERROR("START_ALIVE timeout after %dms.\n",
2640                                 jiffies_to_msecs(UCODE_READY_TIMEOUT));
2641                         ret = -ETIMEDOUT;
2642                         goto out_release_irq;
2643                 }
2644         }
2645
2646 out:
2647         priv->is_open = 1;
2648         IWL_DEBUG_MAC80211("leave\n");
2649         return 0;
2650
2651 out_release_irq:
2652         free_irq(priv->pci_dev->irq, priv);
2653 out_disable_msi:
2654         pci_disable_msi(priv->pci_dev);
2655         pci_disable_device(priv->pci_dev);
2656         priv->is_open = 0;
2657         IWL_DEBUG_MAC80211("leave - failed\n");
2658         return ret;
2659 }
2660
2661 static void iwl_mac_stop(struct ieee80211_hw *hw)
2662 {
2663         struct iwl_priv *priv = hw->priv;
2664
2665         IWL_DEBUG_MAC80211("enter\n");
2666
2667         if (!priv->is_open) {
2668                 IWL_DEBUG_MAC80211("leave - skip\n");
2669                 return;
2670         }
2671
2672         priv->is_open = 0;
2673
2674         if (iwl_is_ready_rf(priv)) {
2675                 /* stop mac, cancel any scan request and clear
2676                  * RXON_FILTER_ASSOC_MSK BIT
2677                  */
2678                 mutex_lock(&priv->mutex);
2679                 iwl_scan_cancel_timeout(priv, 100);
2680                 mutex_unlock(&priv->mutex);
2681         }
2682
2683         iwl_down(priv);
2684
2685         flush_workqueue(priv->workqueue);
2686         free_irq(priv->pci_dev->irq, priv);
2687         pci_disable_msi(priv->pci_dev);
2688         pci_save_state(priv->pci_dev);
2689         pci_disable_device(priv->pci_dev);
2690
2691         IWL_DEBUG_MAC80211("leave\n");
2692 }
2693
2694 static int iwl_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
2695 {
2696         struct iwl_priv *priv = hw->priv;
2697
2698         IWL_DEBUG_MACDUMP("enter\n");
2699
2700         IWL_DEBUG_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
2701                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
2702
2703         if (iwl_tx_skb(priv, skb))
2704                 dev_kfree_skb_any(skb);
2705
2706         IWL_DEBUG_MACDUMP("leave\n");
2707         return 0;
2708 }
2709
2710 static int iwl_mac_add_interface(struct ieee80211_hw *hw,
2711                                  struct ieee80211_if_init_conf *conf)
2712 {
2713         struct iwl_priv *priv = hw->priv;
2714         unsigned long flags;
2715
2716         IWL_DEBUG_MAC80211("enter: type %d\n", conf->type);
2717
2718         if (priv->vif) {
2719                 IWL_DEBUG_MAC80211("leave - vif != NULL\n");
2720                 return -EOPNOTSUPP;
2721         }
2722
2723         spin_lock_irqsave(&priv->lock, flags);
2724         priv->vif = conf->vif;
2725         priv->iw_mode = conf->type;
2726
2727         spin_unlock_irqrestore(&priv->lock, flags);
2728
2729         mutex_lock(&priv->mutex);
2730
2731         if (conf->mac_addr) {
2732                 IWL_DEBUG_MAC80211("Set %pM\n", conf->mac_addr);
2733                 memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
2734         }
2735
2736         if (iwl_set_mode(priv, conf->type) == -EAGAIN)
2737                 /* we are not ready, will run again when ready */
2738                 set_bit(STATUS_MODE_PENDING, &priv->status);
2739
2740         mutex_unlock(&priv->mutex);
2741
2742         IWL_DEBUG_MAC80211("leave\n");
2743         return 0;
2744 }
2745
2746 /**
2747  * iwl_mac_config - mac80211 config callback
2748  *
2749  * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
2750  * be set inappropriately and the driver currently sets the hardware up to
2751  * use it whenever needed.
2752  */
2753 static int iwl_mac_config(struct ieee80211_hw *hw, u32 changed)
2754 {
2755         struct iwl_priv *priv = hw->priv;
2756         const struct iwl_channel_info *ch_info;
2757         struct ieee80211_conf *conf = &hw->conf;
2758         unsigned long flags;
2759         int ret = 0;
2760         u16 channel;
2761
2762         mutex_lock(&priv->mutex);
2763         IWL_DEBUG_MAC80211("enter to channel %d\n", conf->channel->hw_value);
2764
2765         priv->current_ht_config.is_ht = conf->ht.enabled;
2766
2767         if (conf->radio_enabled && iwl_radio_kill_sw_enable_radio(priv)) {
2768                 IWL_DEBUG_MAC80211("leave - RF-KILL - waiting for uCode\n");
2769                 goto out;
2770         }
2771
2772         if (!conf->radio_enabled)
2773                 iwl_radio_kill_sw_disable_radio(priv);
2774
2775         if (!iwl_is_ready(priv)) {
2776                 IWL_DEBUG_MAC80211("leave - not ready\n");
2777                 ret = -EIO;
2778                 goto out;
2779         }
2780
2781         if (unlikely(!priv->cfg->mod_params->disable_hw_scan &&
2782                      test_bit(STATUS_SCANNING, &priv->status))) {
2783                 IWL_DEBUG_MAC80211("leave - scanning\n");
2784                 mutex_unlock(&priv->mutex);
2785                 return 0;
2786         }
2787
2788         channel = ieee80211_frequency_to_channel(conf->channel->center_freq);
2789         ch_info = iwl_get_channel_info(priv, conf->channel->band, channel);
2790         if (!is_channel_valid(ch_info)) {
2791                 IWL_DEBUG_MAC80211("leave - invalid channel\n");
2792                 ret = -EINVAL;
2793                 goto out;
2794         }
2795
2796         if (priv->iw_mode == NL80211_IFTYPE_ADHOC &&
2797             !is_channel_ibss(ch_info)) {
2798                 IWL_ERROR("channel %d in band %d not IBSS channel\n",
2799                         conf->channel->hw_value, conf->channel->band);
2800                 ret = -EINVAL;
2801                 goto out;
2802         }
2803
2804         spin_lock_irqsave(&priv->lock, flags);
2805
2806
2807         /* if we are switching from ht to 2.4 clear flags
2808          * from any ht related info since 2.4 does not
2809          * support ht */
2810         if ((le16_to_cpu(priv->staging_rxon.channel) != channel)
2811 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
2812             && !(conf->flags & IEEE80211_CONF_CHANNEL_SWITCH)
2813 #endif
2814         )
2815                 priv->staging_rxon.flags = 0;
2816
2817         iwl_set_rxon_channel(priv, conf->channel);
2818
2819         iwl_set_flags_for_band(priv, conf->channel->band);
2820
2821         /* The list of supported rates and rate mask can be different
2822          * for each band; since the band may have changed, reset
2823          * the rate mask to what mac80211 lists */
2824         iwl_set_rate(priv);
2825
2826         spin_unlock_irqrestore(&priv->lock, flags);
2827
2828 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
2829         if (conf->flags & IEEE80211_CONF_CHANNEL_SWITCH) {
2830                 iwl_hw_channel_switch(priv, conf->channel);
2831                 goto out;
2832         }
2833 #endif
2834
2835         if (!conf->radio_enabled) {
2836                 IWL_DEBUG_MAC80211("leave - radio disabled\n");
2837                 goto out;
2838         }
2839
2840         if (iwl_is_rfkill(priv)) {
2841                 IWL_DEBUG_MAC80211("leave - RF kill\n");
2842                 ret = -EIO;
2843                 goto out;
2844         }
2845
2846         if (conf->flags & IEEE80211_CONF_PS)
2847                 ret = iwl_power_set_user_mode(priv, IWL_POWER_INDEX_3);
2848         else
2849                 ret = iwl_power_set_user_mode(priv, IWL_POWER_MODE_CAM);
2850         if (ret)
2851                 IWL_DEBUG_MAC80211("Error setting power level\n");
2852
2853         IWL_DEBUG_MAC80211("TX Power old=%d new=%d\n",
2854                            priv->tx_power_user_lmt, conf->power_level);
2855
2856         iwl_set_tx_power(priv, conf->power_level, false);
2857
2858         iwl_set_rate(priv);
2859
2860         if (memcmp(&priv->active_rxon,
2861                    &priv->staging_rxon, sizeof(priv->staging_rxon)))
2862                 iwl_commit_rxon(priv);
2863         else
2864                 IWL_DEBUG_INFO("No re-sending same RXON configuration.\n");
2865
2866         IWL_DEBUG_MAC80211("leave\n");
2867
2868 out:
2869         mutex_unlock(&priv->mutex);
2870         return ret;
2871 }
2872
2873 static void iwl_config_ap(struct iwl_priv *priv)
2874 {
2875         int ret = 0;
2876         unsigned long flags;
2877
2878         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2879                 return;
2880
2881         /* The following should be done only at AP bring up */
2882         if (!iwl_is_associated(priv)) {
2883
2884                 /* RXON - unassoc (to set timing command) */
2885                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2886                 iwl_commit_rxon(priv);
2887
2888                 /* RXON Timing */
2889                 iwl_setup_rxon_timing(priv);
2890                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
2891                                 sizeof(priv->rxon_timing), &priv->rxon_timing);
2892                 if (ret)
2893                         IWL_WARNING("REPLY_RXON_TIMING failed - "
2894                                         "Attempting to continue.\n");
2895
2896                 iwl_set_rxon_chain(priv);
2897
2898                 /* FIXME: what should be the assoc_id for AP? */
2899                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
2900                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
2901                         priv->staging_rxon.flags |=
2902                                 RXON_FLG_SHORT_PREAMBLE_MSK;
2903                 else
2904                         priv->staging_rxon.flags &=
2905                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
2906
2907                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
2908                         if (priv->assoc_capability &
2909                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
2910                                 priv->staging_rxon.flags |=
2911                                         RXON_FLG_SHORT_SLOT_MSK;
2912                         else
2913                                 priv->staging_rxon.flags &=
2914                                         ~RXON_FLG_SHORT_SLOT_MSK;
2915
2916                         if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
2917                                 priv->staging_rxon.flags &=
2918                                         ~RXON_FLG_SHORT_SLOT_MSK;
2919                 }
2920                 /* restore RXON assoc */
2921                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2922                 iwl_commit_rxon(priv);
2923                 spin_lock_irqsave(&priv->lock, flags);
2924                 iwl_activate_qos(priv, 1);
2925                 spin_unlock_irqrestore(&priv->lock, flags);
2926                 iwl_rxon_add_station(priv, iwl_bcast_addr, 0);
2927         }
2928         iwl_send_beacon_cmd(priv);
2929
2930         /* FIXME - we need to add code here to detect a totally new
2931          * configuration, reset the AP, unassoc, rxon timing, assoc,
2932          * clear sta table, add BCAST sta... */
2933 }
2934
2935 /* temporary */
2936 static int iwl_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb);
2937
2938 static int iwl_mac_config_interface(struct ieee80211_hw *hw,
2939                                         struct ieee80211_vif *vif,
2940                                     struct ieee80211_if_conf *conf)
2941 {
2942         struct iwl_priv *priv = hw->priv;
2943         int rc;
2944
2945         if (conf == NULL)
2946                 return -EIO;
2947
2948         if (priv->vif != vif) {
2949                 IWL_DEBUG_MAC80211("leave - priv->vif != vif\n");
2950                 return 0;
2951         }
2952
2953         if (priv->iw_mode == NL80211_IFTYPE_ADHOC &&
2954             conf->changed & IEEE80211_IFCC_BEACON) {
2955                 struct sk_buff *beacon = ieee80211_beacon_get(hw, vif);
2956                 if (!beacon)
2957                         return -ENOMEM;
2958                 rc = iwl_mac_beacon_update(hw, beacon);
2959                 if (rc)
2960                         return rc;
2961         }
2962
2963         if (!iwl_is_alive(priv))
2964                 return -EAGAIN;
2965
2966         mutex_lock(&priv->mutex);
2967
2968         if (conf->bssid)
2969                 IWL_DEBUG_MAC80211("bssid: %pM\n", conf->bssid);
2970
2971 /*
2972  * very dubious code was here; the probe filtering flag is never set:
2973  *
2974         if (unlikely(test_bit(STATUS_SCANNING, &priv->status)) &&
2975             !(priv->hw->flags & IEEE80211_HW_NO_PROBE_FILTERING)) {
2976  */
2977
2978         if (priv->iw_mode == NL80211_IFTYPE_AP) {
2979                 if (!conf->bssid) {
2980                         conf->bssid = priv->mac_addr;
2981                         memcpy(priv->bssid, priv->mac_addr, ETH_ALEN);
2982                         IWL_DEBUG_MAC80211("bssid was set to: %pM\n",
2983                                            conf->bssid);
2984                 }
2985                 if (priv->ibss_beacon)
2986                         dev_kfree_skb(priv->ibss_beacon);
2987
2988                 priv->ibss_beacon = ieee80211_beacon_get(hw, vif);
2989         }
2990
2991         if (iwl_is_rfkill(priv))
2992                 goto done;
2993
2994         if (conf->bssid && !is_zero_ether_addr(conf->bssid) &&
2995             !is_multicast_ether_addr(conf->bssid)) {
2996                 /* If there is currently a HW scan going on in the background
2997                  * then we need to cancel it else the RXON below will fail. */
2998                 if (iwl_scan_cancel_timeout(priv, 100)) {
2999                         IWL_WARNING("Aborted scan still in progress "
3000                                     "after 100ms\n");
3001                         IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
3002                         mutex_unlock(&priv->mutex);
3003                         return -EAGAIN;
3004                 }
3005                 memcpy(priv->staging_rxon.bssid_addr, conf->bssid, ETH_ALEN);
3006
3007                 /* TODO: Audit driver for usage of these members and see
3008                  * if mac80211 deprecates them (priv->bssid looks like it
3009                  * shouldn't be there, but I haven't scanned the IBSS code
3010                  * to verify) - jpk */
3011                 memcpy(priv->bssid, conf->bssid, ETH_ALEN);
3012
3013                 if (priv->iw_mode == NL80211_IFTYPE_AP)
3014                         iwl_config_ap(priv);
3015                 else {
3016                         rc = iwl_commit_rxon(priv);
3017                         if ((priv->iw_mode == NL80211_IFTYPE_STATION) && rc)
3018                                 iwl_rxon_add_station(
3019                                         priv, priv->active_rxon.bssid_addr, 1);
3020                 }
3021
3022         } else {
3023                 iwl_scan_cancel_timeout(priv, 100);
3024                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3025                 iwl_commit_rxon(priv);
3026         }
3027
3028  done:
3029         IWL_DEBUG_MAC80211("leave\n");
3030         mutex_unlock(&priv->mutex);
3031
3032         return 0;
3033 }
3034
3035 static void iwl_configure_filter(struct ieee80211_hw *hw,
3036                                  unsigned int changed_flags,
3037                                  unsigned int *total_flags,
3038                                  int mc_count, struct dev_addr_list *mc_list)
3039 {
3040         struct iwl_priv *priv = hw->priv;
3041
3042         if (changed_flags & (*total_flags) & FIF_OTHER_BSS) {
3043                 IWL_DEBUG_MAC80211("Enter: type %d (0x%x, 0x%x)\n",
3044                                    NL80211_IFTYPE_MONITOR,
3045                                    changed_flags, *total_flags);
3046                 /* queue work 'cuz mac80211 is holding a lock which
3047                  * prevents us from issuing (synchronous) f/w cmds */
3048                 queue_work(priv->workqueue, &priv->set_monitor);
3049         }
3050         *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI |
3051                         FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
3052 }
3053
3054 static void iwl_mac_remove_interface(struct ieee80211_hw *hw,
3055                                      struct ieee80211_if_init_conf *conf)
3056 {
3057         struct iwl_priv *priv = hw->priv;
3058
3059         IWL_DEBUG_MAC80211("enter\n");
3060
3061         mutex_lock(&priv->mutex);
3062
3063         if (iwl_is_ready_rf(priv)) {
3064                 iwl_scan_cancel_timeout(priv, 100);
3065                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3066                 iwl_commit_rxon(priv);
3067         }
3068         if (priv->vif == conf->vif) {
3069                 priv->vif = NULL;
3070                 memset(priv->bssid, 0, ETH_ALEN);
3071         }
3072         mutex_unlock(&priv->mutex);
3073
3074         IWL_DEBUG_MAC80211("leave\n");
3075
3076 }
3077
3078 #define IWL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6)
3079 static void iwl_bss_info_changed(struct ieee80211_hw *hw,
3080                                      struct ieee80211_vif *vif,
3081                                      struct ieee80211_bss_conf *bss_conf,
3082                                      u32 changes)
3083 {
3084         struct iwl_priv *priv = hw->priv;
3085
3086         IWL_DEBUG_MAC80211("changes = 0x%X\n", changes);
3087
3088         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
3089                 IWL_DEBUG_MAC80211("ERP_PREAMBLE %d\n",
3090                                    bss_conf->use_short_preamble);
3091                 if (bss_conf->use_short_preamble)
3092                         priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
3093                 else
3094                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
3095         }
3096
3097         if (changes & BSS_CHANGED_ERP_CTS_PROT) {
3098                 IWL_DEBUG_MAC80211("ERP_CTS %d\n", bss_conf->use_cts_prot);
3099                 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
3100                         priv->staging_rxon.flags |= RXON_FLG_TGG_PROTECT_MSK;
3101                 else
3102                         priv->staging_rxon.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
3103         }
3104
3105         if (changes & BSS_CHANGED_HT) {
3106                 iwl_ht_conf(priv, bss_conf);
3107                 iwl_set_rxon_chain(priv);
3108         }
3109
3110         if (changes & BSS_CHANGED_ASSOC) {
3111                 IWL_DEBUG_MAC80211("ASSOC %d\n", bss_conf->assoc);
3112                 /* This should never happen as this function should
3113                  * never be called from interrupt context. */
3114                 if (WARN_ON_ONCE(in_interrupt()))
3115                         return;
3116                 if (bss_conf->assoc) {
3117                         priv->assoc_id = bss_conf->aid;
3118                         priv->beacon_int = bss_conf->beacon_int;
3119                         priv->power_data.dtim_period = bss_conf->dtim_period;
3120                         priv->timestamp = bss_conf->timestamp;
3121                         priv->assoc_capability = bss_conf->assoc_capability;
3122
3123                         /* we have just associated, don't start scan too early
3124                          * leave time for EAPOL exchange to complete
3125                          */
3126                         priv->next_scan_jiffies = jiffies +
3127                                         IWL_DELAY_NEXT_SCAN_AFTER_ASSOC;
3128                         mutex_lock(&priv->mutex);
3129                         iwl_post_associate(priv);
3130                         mutex_unlock(&priv->mutex);
3131                 } else {
3132                         priv->assoc_id = 0;
3133                         IWL_DEBUG_MAC80211("DISASSOC %d\n", bss_conf->assoc);
3134                 }
3135         } else if (changes && iwl_is_associated(priv) && priv->assoc_id) {
3136                         IWL_DEBUG_MAC80211("Associated Changes %d\n", changes);
3137                         iwl_send_rxon_assoc(priv);
3138         }
3139
3140 }
3141
3142 static int iwl_mac_hw_scan(struct ieee80211_hw *hw, u8 *ssid, size_t ssid_len)
3143 {
3144         unsigned long flags;
3145         struct iwl_priv *priv = hw->priv;
3146         int ret;
3147
3148         IWL_DEBUG_MAC80211("enter\n");
3149
3150         mutex_lock(&priv->mutex);
3151         spin_lock_irqsave(&priv->lock, flags);
3152
3153         if (!iwl_is_ready_rf(priv)) {
3154                 ret = -EIO;
3155                 IWL_DEBUG_MAC80211("leave - not ready or exit pending\n");
3156                 goto out_unlock;
3157         }
3158
3159         if (priv->iw_mode == NL80211_IFTYPE_AP) {       /* APs don't scan */
3160                 ret = -EIO;
3161                 IWL_ERROR("ERROR: APs don't scan\n");
3162                 goto out_unlock;
3163         }
3164
3165         /* We don't schedule scan within next_scan_jiffies period.
3166          * Avoid scanning during possible EAPOL exchange, return
3167          * success immediately.
3168          */
3169         if (priv->next_scan_jiffies &&
3170             time_after(priv->next_scan_jiffies, jiffies)) {
3171                 IWL_DEBUG_SCAN("scan rejected: within next scan period\n");
3172                 queue_work(priv->workqueue, &priv->scan_completed);
3173                 ret = 0;
3174                 goto out_unlock;
3175         }
3176
3177         /* if we just finished scan ask for delay */
3178         if (iwl_is_associated(priv) && priv->last_scan_jiffies &&
3179             time_after(priv->last_scan_jiffies + IWL_DELAY_NEXT_SCAN, jiffies)) {
3180                 IWL_DEBUG_SCAN("scan rejected: within previous scan period\n");
3181                 queue_work(priv->workqueue, &priv->scan_completed);
3182                 ret = 0;
3183                 goto out_unlock;
3184         }
3185
3186         if (ssid_len) {
3187                 priv->one_direct_scan = 1;
3188                 priv->direct_ssid_len =  min_t(u8, ssid_len, IW_ESSID_MAX_SIZE);
3189                 memcpy(priv->direct_ssid, ssid, priv->direct_ssid_len);
3190         } else {
3191                 priv->one_direct_scan = 0;
3192         }
3193
3194         ret = iwl_scan_initiate(priv);
3195
3196         IWL_DEBUG_MAC80211("leave\n");
3197
3198 out_unlock:
3199         spin_unlock_irqrestore(&priv->lock, flags);
3200         mutex_unlock(&priv->mutex);
3201
3202         return ret;
3203 }
3204
3205 static void iwl_mac_update_tkip_key(struct ieee80211_hw *hw,
3206                         struct ieee80211_key_conf *keyconf, const u8 *addr,
3207                         u32 iv32, u16 *phase1key)
3208 {
3209         struct iwl_priv *priv = hw->priv;
3210         u8 sta_id = IWL_INVALID_STATION;
3211         unsigned long flags;
3212         __le16 key_flags = 0;
3213         int i;
3214
3215         IWL_DEBUG_MAC80211("enter\n");
3216
3217         sta_id = iwl_find_station(priv, addr);
3218         if (sta_id == IWL_INVALID_STATION) {
3219                 IWL_DEBUG_MAC80211("leave - %pM not in station map.\n",
3220                                    addr);
3221                 return;
3222         }
3223
3224         if (iwl_scan_cancel(priv)) {
3225                 /* cancel scan failed, just live w/ bad key and rely
3226                    briefly on SW decryption */
3227                 return;
3228         }
3229
3230         key_flags |= (STA_KEY_FLG_TKIP | STA_KEY_FLG_MAP_KEY_MSK);
3231         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
3232         key_flags &= ~STA_KEY_FLG_INVALID;
3233
3234         if (sta_id == priv->hw_params.bcast_sta_id)
3235                 key_flags |= STA_KEY_MULTICAST_MSK;
3236
3237         spin_lock_irqsave(&priv->sta_lock, flags);
3238
3239         priv->stations[sta_id].sta.key.key_flags = key_flags;
3240         priv->stations[sta_id].sta.key.tkip_rx_tsc_byte2 = (u8) iv32;
3241
3242         for (i = 0; i < 5; i++)
3243                 priv->stations[sta_id].sta.key.tkip_rx_ttak[i] =
3244                         cpu_to_le16(phase1key[i]);
3245
3246         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
3247         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
3248
3249         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
3250
3251         spin_unlock_irqrestore(&priv->sta_lock, flags);
3252
3253         IWL_DEBUG_MAC80211("leave\n");
3254 }
3255
3256 static int iwl_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
3257                            const u8 *local_addr, const u8 *addr,
3258                            struct ieee80211_key_conf *key)
3259 {
3260         struct iwl_priv *priv = hw->priv;
3261         int ret = 0;
3262         u8 sta_id = IWL_INVALID_STATION;
3263         u8 is_default_wep_key = 0;
3264
3265         IWL_DEBUG_MAC80211("enter\n");
3266
3267         if (priv->hw_params.sw_crypto) {
3268                 IWL_DEBUG_MAC80211("leave - hwcrypto disabled\n");
3269                 return -EOPNOTSUPP;
3270         }
3271
3272         if (is_zero_ether_addr(addr))
3273                 /* only support pairwise keys */
3274                 return -EOPNOTSUPP;
3275
3276         sta_id = iwl_find_station(priv, addr);
3277         if (sta_id == IWL_INVALID_STATION) {
3278                 IWL_DEBUG_MAC80211("leave - %pM not in station map.\n",
3279                                    addr);
3280                 return -EINVAL;
3281
3282         }
3283
3284         mutex_lock(&priv->mutex);
3285         iwl_scan_cancel_timeout(priv, 100);
3286         mutex_unlock(&priv->mutex);
3287
3288         /* If we are getting WEP group key and we didn't receive any key mapping
3289          * so far, we are in legacy wep mode (group key only), otherwise we are
3290          * in 1X mode.
3291          * In legacy wep mode, we use another host command to the uCode */
3292         if (key->alg == ALG_WEP && sta_id == priv->hw_params.bcast_sta_id &&
3293                 priv->iw_mode != NL80211_IFTYPE_AP) {
3294                 if (cmd == SET_KEY)
3295                         is_default_wep_key = !priv->key_mapping_key;
3296                 else
3297                         is_default_wep_key =
3298                                         (key->hw_key_idx == HW_KEY_DEFAULT);
3299         }
3300
3301         switch (cmd) {
3302         case SET_KEY:
3303                 if (is_default_wep_key)
3304                         ret = iwl_set_default_wep_key(priv, key);
3305                 else
3306                         ret = iwl_set_dynamic_key(priv, key, sta_id);
3307
3308                 IWL_DEBUG_MAC80211("enable hwcrypto key\n");
3309                 break;
3310         case DISABLE_KEY:
3311                 if (is_default_wep_key)
3312                         ret = iwl_remove_default_wep_key(priv, key);
3313                 else
3314                         ret = iwl_remove_dynamic_key(priv, key, sta_id);
3315
3316                 IWL_DEBUG_MAC80211("disable hwcrypto key\n");
3317                 break;
3318         default:
3319                 ret = -EINVAL;
3320         }
3321
3322         IWL_DEBUG_MAC80211("leave\n");
3323
3324         return ret;
3325 }
3326
3327 static int iwl_mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
3328                            const struct ieee80211_tx_queue_params *params)
3329 {
3330         struct iwl_priv *priv = hw->priv;
3331         unsigned long flags;
3332         int q;
3333
3334         IWL_DEBUG_MAC80211("enter\n");
3335
3336         if (!iwl_is_ready_rf(priv)) {
3337                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
3338                 return -EIO;
3339         }
3340
3341         if (queue >= AC_NUM) {
3342                 IWL_DEBUG_MAC80211("leave - queue >= AC_NUM %d\n", queue);
3343                 return 0;
3344         }
3345
3346         if (!priv->qos_data.qos_enable) {
3347                 priv->qos_data.qos_active = 0;
3348                 IWL_DEBUG_MAC80211("leave - qos not enabled\n");
3349                 return 0;
3350         }
3351         q = AC_NUM - 1 - queue;
3352
3353         spin_lock_irqsave(&priv->lock, flags);
3354
3355         priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
3356         priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
3357         priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
3358         priv->qos_data.def_qos_parm.ac[q].edca_txop =
3359                         cpu_to_le16((params->txop * 32));
3360
3361         priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
3362         priv->qos_data.qos_active = 1;
3363
3364         if (priv->iw_mode == NL80211_IFTYPE_AP)
3365                 iwl_activate_qos(priv, 1);
3366         else if (priv->assoc_id && iwl_is_associated(priv))
3367                 iwl_activate_qos(priv, 0);
3368
3369         spin_unlock_irqrestore(&priv->lock, flags);
3370
3371         IWL_DEBUG_MAC80211("leave\n");
3372         return 0;
3373 }
3374
3375 static int iwl_mac_ampdu_action(struct ieee80211_hw *hw,
3376                              enum ieee80211_ampdu_mlme_action action,
3377                              struct ieee80211_sta *sta, u16 tid, u16 *ssn)
3378 {
3379         struct iwl_priv *priv = hw->priv;
3380
3381         IWL_DEBUG_HT("A-MPDU action on addr %pM tid %d\n",
3382                      sta->addr, tid);
3383
3384         if (!(priv->cfg->sku & IWL_SKU_N))
3385                 return -EACCES;
3386
3387         switch (action) {
3388         case IEEE80211_AMPDU_RX_START:
3389                 IWL_DEBUG_HT("start Rx\n");
3390                 return iwl_rx_agg_start(priv, sta->addr, tid, *ssn);
3391         case IEEE80211_AMPDU_RX_STOP:
3392                 IWL_DEBUG_HT("stop Rx\n");
3393                 return iwl_rx_agg_stop(priv, sta->addr, tid);
3394         case IEEE80211_AMPDU_TX_START:
3395                 IWL_DEBUG_HT("start Tx\n");
3396                 return iwl_tx_agg_start(priv, sta->addr, tid, ssn);
3397         case IEEE80211_AMPDU_TX_STOP:
3398                 IWL_DEBUG_HT("stop Tx\n");
3399                 return iwl_tx_agg_stop(priv, sta->addr, tid);
3400         default:
3401                 IWL_DEBUG_HT("unknown\n");
3402                 return -EINVAL;
3403                 break;
3404         }
3405         return 0;
3406 }
3407 static int iwl_mac_get_tx_stats(struct ieee80211_hw *hw,
3408                                 struct ieee80211_tx_queue_stats *stats)
3409 {
3410         struct iwl_priv *priv = hw->priv;
3411         int i, avail;
3412         struct iwl_tx_queue *txq;
3413         struct iwl_queue *q;
3414         unsigned long flags;
3415
3416         IWL_DEBUG_MAC80211("enter\n");
3417
3418         if (!iwl_is_ready_rf(priv)) {
3419                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
3420                 return -EIO;
3421         }
3422
3423         spin_lock_irqsave(&priv->lock, flags);
3424
3425         for (i = 0; i < AC_NUM; i++) {
3426                 txq = &priv->txq[i];
3427                 q = &txq->q;
3428                 avail = iwl_queue_space(q);
3429
3430                 stats[i].len = q->n_window - avail;
3431                 stats[i].limit = q->n_window - q->high_mark;
3432                 stats[i].count = q->n_window;
3433
3434         }
3435         spin_unlock_irqrestore(&priv->lock, flags);
3436
3437         IWL_DEBUG_MAC80211("leave\n");
3438
3439         return 0;
3440 }
3441
3442 static int iwl_mac_get_stats(struct ieee80211_hw *hw,
3443                              struct ieee80211_low_level_stats *stats)
3444 {
3445         struct iwl_priv *priv = hw->priv;
3446
3447         priv = hw->priv;
3448         IWL_DEBUG_MAC80211("enter\n");
3449         IWL_DEBUG_MAC80211("leave\n");
3450
3451         return 0;
3452 }
3453
3454 static void iwl_mac_reset_tsf(struct ieee80211_hw *hw)
3455 {
3456         struct iwl_priv *priv = hw->priv;
3457         unsigned long flags;
3458
3459         mutex_lock(&priv->mutex);
3460         IWL_DEBUG_MAC80211("enter\n");
3461
3462         spin_lock_irqsave(&priv->lock, flags);
3463         memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_info));
3464         spin_unlock_irqrestore(&priv->lock, flags);
3465
3466         iwl_reset_qos(priv);
3467
3468         spin_lock_irqsave(&priv->lock, flags);
3469         priv->assoc_id = 0;
3470         priv->assoc_capability = 0;
3471         priv->assoc_station_added = 0;
3472
3473         /* new association get rid of ibss beacon skb */
3474         if (priv->ibss_beacon)
3475                 dev_kfree_skb(priv->ibss_beacon);
3476
3477         priv->ibss_beacon = NULL;
3478
3479         priv->beacon_int = priv->hw->conf.beacon_int;
3480         priv->timestamp = 0;
3481         if ((priv->iw_mode == NL80211_IFTYPE_STATION))
3482                 priv->beacon_int = 0;
3483
3484         spin_unlock_irqrestore(&priv->lock, flags);
3485
3486         if (!iwl_is_ready_rf(priv)) {
3487                 IWL_DEBUG_MAC80211("leave - not ready\n");
3488                 mutex_unlock(&priv->mutex);
3489                 return;
3490         }
3491
3492         /* we are restarting association process
3493          * clear RXON_FILTER_ASSOC_MSK bit
3494          */
3495         if (priv->iw_mode != NL80211_IFTYPE_AP) {
3496                 iwl_scan_cancel_timeout(priv, 100);
3497                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3498                 iwl_commit_rxon(priv);
3499         }
3500
3501         iwl_power_update_mode(priv, 0);
3502
3503         /* Per mac80211.h: This is only used in IBSS mode... */
3504         if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
3505
3506                 /* switch to CAM during association period.
3507                  * the ucode will block any association/authentication
3508                  * frome during assiciation period if it can not hear
3509                  * the AP because of PM. the timer enable PM back is
3510                  * association do not complete
3511                  */
3512                 if (priv->hw->conf.channel->flags & (IEEE80211_CHAN_PASSIVE_SCAN |
3513                                                      IEEE80211_CHAN_RADAR))
3514                                 iwl_power_disable_management(priv, 3000);
3515
3516                 IWL_DEBUG_MAC80211("leave - not in IBSS\n");
3517                 mutex_unlock(&priv->mutex);
3518                 return;
3519         }
3520
3521         iwl_set_rate(priv);
3522
3523         mutex_unlock(&priv->mutex);
3524
3525         IWL_DEBUG_MAC80211("leave\n");
3526 }
3527
3528 static int iwl_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb)
3529 {
3530         struct iwl_priv *priv = hw->priv;
3531         unsigned long flags;
3532         __le64 timestamp;
3533
3534         mutex_lock(&priv->mutex);
3535         IWL_DEBUG_MAC80211("enter\n");
3536
3537         if (!iwl_is_ready_rf(priv)) {
3538                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
3539                 mutex_unlock(&priv->mutex);
3540                 return -EIO;
3541         }
3542
3543         if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
3544                 IWL_DEBUG_MAC80211("leave - not IBSS\n");
3545                 mutex_unlock(&priv->mutex);
3546                 return -EIO;
3547         }
3548
3549         spin_lock_irqsave(&priv->lock, flags);
3550
3551         if (priv->ibss_beacon)
3552                 dev_kfree_skb(priv->ibss_beacon);
3553
3554         priv->ibss_beacon = skb;
3555
3556         priv->assoc_id = 0;
3557         timestamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
3558         priv->timestamp = le64_to_cpu(timestamp);
3559
3560         IWL_DEBUG_MAC80211("leave\n");
3561         spin_unlock_irqrestore(&priv->lock, flags);
3562
3563         iwl_reset_qos(priv);
3564
3565         iwl_post_associate(priv);
3566
3567         mutex_unlock(&priv->mutex);
3568
3569         return 0;
3570 }
3571
3572 /*****************************************************************************
3573  *
3574  * sysfs attributes
3575  *
3576  *****************************************************************************/
3577
3578 #ifdef CONFIG_IWLWIFI_DEBUG
3579
3580 /*
3581  * The following adds a new attribute to the sysfs representation
3582  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
3583  * used for controlling the debug level.
3584  *
3585  * See the level definitions in iwl for details.
3586  */
3587
3588 static ssize_t show_debug_level(struct device *d,
3589                                 struct device_attribute *attr, char *buf)
3590 {
3591         struct iwl_priv *priv = d->driver_data;
3592
3593         return sprintf(buf, "0x%08X\n", priv->debug_level);
3594 }
3595 static ssize_t store_debug_level(struct device *d,
3596                                 struct device_attribute *attr,
3597                                  const char *buf, size_t count)
3598 {
3599         struct iwl_priv *priv = d->driver_data;
3600         unsigned long val;
3601         int ret;
3602
3603         ret = strict_strtoul(buf, 0, &val);
3604         if (ret)
3605                 printk(KERN_INFO DRV_NAME
3606                        ": %s is not in hex or decimal form.\n", buf);
3607         else
3608                 priv->debug_level = val;
3609
3610         return strnlen(buf, count);
3611 }
3612
3613 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
3614                         show_debug_level, store_debug_level);
3615
3616
3617 #endif /* CONFIG_IWLWIFI_DEBUG */
3618
3619
3620 static ssize_t show_version(struct device *d,
3621                                 struct device_attribute *attr, char *buf)
3622 {
3623         struct iwl_priv *priv = d->driver_data;
3624         struct iwl_alive_resp *palive = &priv->card_alive;
3625         ssize_t pos = 0;
3626         u16 eeprom_ver;
3627
3628         if (palive->is_valid)
3629                 pos += sprintf(buf + pos,
3630                                 "fw version: 0x%01X.0x%01X.0x%01X.0x%01X\n"
3631                                 "fw type: 0x%01X 0x%01X\n",
3632                                 palive->ucode_major, palive->ucode_minor,
3633                                 palive->sw_rev[0], palive->sw_rev[1],
3634                                 palive->ver_type, palive->ver_subtype);
3635         else
3636                 pos += sprintf(buf + pos, "fw not loaded\n");
3637
3638         if (priv->eeprom) {
3639                 eeprom_ver = iwl_eeprom_query16(priv, EEPROM_VERSION);
3640                 pos += sprintf(buf + pos, "EEPROM version: 0x%x\n",
3641                                  eeprom_ver);
3642         } else {
3643                 pos += sprintf(buf + pos, "EEPROM not initialzed\n");
3644         }
3645
3646         return pos;
3647 }
3648
3649 static DEVICE_ATTR(version, S_IWUSR | S_IRUGO, show_version, NULL);
3650
3651 static ssize_t show_temperature(struct device *d,
3652                                 struct device_attribute *attr, char *buf)
3653 {
3654         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3655
3656         if (!iwl_is_alive(priv))
3657                 return -EAGAIN;
3658
3659         return sprintf(buf, "%d\n", priv->temperature);
3660 }
3661
3662 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
3663
3664 static ssize_t show_tx_power(struct device *d,
3665                              struct device_attribute *attr, char *buf)
3666 {
3667         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3668         return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
3669 }
3670
3671 static ssize_t store_tx_power(struct device *d,
3672                               struct device_attribute *attr,
3673                               const char *buf, size_t count)
3674 {
3675         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3676         unsigned long val;
3677         int ret;
3678
3679         ret = strict_strtoul(buf, 10, &val);
3680         if (ret)
3681                 printk(KERN_INFO DRV_NAME
3682                        ": %s is not in decimal form.\n", buf);
3683         else
3684                 iwl_set_tx_power(priv, val, false);
3685
3686         return count;
3687 }
3688
3689 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
3690
3691 static ssize_t show_flags(struct device *d,
3692                           struct device_attribute *attr, char *buf)
3693 {
3694         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3695
3696         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
3697 }
3698
3699 static ssize_t store_flags(struct device *d,
3700                            struct device_attribute *attr,
3701                            const char *buf, size_t count)
3702 {
3703         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3704         unsigned long val;
3705         u32 flags;
3706         int ret = strict_strtoul(buf, 0, &val);
3707         if (ret)
3708                 return ret;
3709         flags = (u32)val;
3710
3711         mutex_lock(&priv->mutex);
3712         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
3713                 /* Cancel any currently running scans... */
3714                 if (iwl_scan_cancel_timeout(priv, 100))
3715                         IWL_WARNING("Could not cancel scan.\n");
3716                 else {
3717                         IWL_DEBUG_INFO("Commit rxon.flags = 0x%04X\n", flags);
3718                         priv->staging_rxon.flags = cpu_to_le32(flags);
3719                         iwl_commit_rxon(priv);
3720                 }
3721         }
3722         mutex_unlock(&priv->mutex);
3723
3724         return count;
3725 }
3726
3727 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
3728
3729 static ssize_t show_filter_flags(struct device *d,
3730                                  struct device_attribute *attr, char *buf)
3731 {
3732         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3733
3734         return sprintf(buf, "0x%04X\n",
3735                 le32_to_cpu(priv->active_rxon.filter_flags));
3736 }
3737
3738 static ssize_t store_filter_flags(struct device *d,
3739                                   struct device_attribute *attr,
3740                                   const char *buf, size_t count)
3741 {
3742         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3743         unsigned long val;
3744         u32 filter_flags;
3745         int ret = strict_strtoul(buf, 0, &val);
3746         if (ret)
3747                 return ret;
3748         filter_flags = (u32)val;
3749
3750         mutex_lock(&priv->mutex);
3751         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
3752                 /* Cancel any currently running scans... */
3753                 if (iwl_scan_cancel_timeout(priv, 100))
3754                         IWL_WARNING("Could not cancel scan.\n");
3755                 else {
3756                         IWL_DEBUG_INFO("Committing rxon.filter_flags = "
3757                                        "0x%04X\n", filter_flags);
3758                         priv->staging_rxon.filter_flags =
3759                                 cpu_to_le32(filter_flags);
3760                         iwl_commit_rxon(priv);
3761                 }
3762         }
3763         mutex_unlock(&priv->mutex);
3764
3765         return count;
3766 }
3767
3768 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
3769                    store_filter_flags);
3770
3771 #ifdef CONFIG_IWLAGN_SPECTRUM_MEASUREMENT
3772
3773 static ssize_t show_measurement(struct device *d,
3774                                 struct device_attribute *attr, char *buf)
3775 {
3776         struct iwl_priv *priv = dev_get_drvdata(d);
3777         struct iwl4965_spectrum_notification measure_report;
3778         u32 size = sizeof(measure_report), len = 0, ofs = 0;
3779         u8 *data = (u8 *)&measure_report;
3780         unsigned long flags;
3781
3782         spin_lock_irqsave(&priv->lock, flags);
3783         if (!(priv->measurement_status & MEASUREMENT_READY)) {
3784                 spin_unlock_irqrestore(&priv->lock, flags);
3785                 return 0;
3786         }
3787         memcpy(&measure_report, &priv->measure_report, size);
3788         priv->measurement_status = 0;
3789         spin_unlock_irqrestore(&priv->lock, flags);
3790
3791         while (size && (PAGE_SIZE - len)) {
3792                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3793                                    PAGE_SIZE - len, 1);
3794                 len = strlen(buf);
3795                 if (PAGE_SIZE - len)
3796                         buf[len++] = '\n';
3797
3798                 ofs += 16;
3799                 size -= min(size, 16U);
3800         }
3801
3802         return len;
3803 }
3804
3805 static ssize_t store_measurement(struct device *d,
3806                                  struct device_attribute *attr,
3807                                  const char *buf, size_t count)
3808 {
3809         struct iwl_priv *priv = dev_get_drvdata(d);
3810         struct ieee80211_measurement_params params = {
3811                 .channel = le16_to_cpu(priv->active_rxon.channel),
3812                 .start_time = cpu_to_le64(priv->last_tsf),
3813                 .duration = cpu_to_le16(1),
3814         };
3815         u8 type = IWL_MEASURE_BASIC;
3816         u8 buffer[32];
3817         u8 channel;
3818
3819         if (count) {
3820                 char *p = buffer;
3821                 strncpy(buffer, buf, min(sizeof(buffer), count));
3822                 channel = simple_strtoul(p, NULL, 0);
3823                 if (channel)
3824                         params.channel = channel;
3825
3826                 p = buffer;
3827                 while (*p && *p != ' ')
3828                         p++;
3829                 if (*p)
3830                         type = simple_strtoul(p + 1, NULL, 0);
3831         }
3832
3833         IWL_DEBUG_INFO("Invoking measurement of type %d on "
3834                        "channel %d (for '%s')\n", type, params.channel, buf);
3835         iwl_get_measurement(priv, &params, type);
3836
3837         return count;
3838 }
3839
3840 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
3841                    show_measurement, store_measurement);
3842 #endif /* CONFIG_IWLAGN_SPECTRUM_MEASUREMENT */
3843
3844 static ssize_t store_retry_rate(struct device *d,
3845                                 struct device_attribute *attr,
3846                                 const char *buf, size_t count)
3847 {
3848         struct iwl_priv *priv = dev_get_drvdata(d);
3849         long val;
3850         int ret  = strict_strtol(buf, 10, &val);
3851         if (!ret)
3852                 return ret;
3853
3854         priv->retry_rate = (val > 0) ? val : 1;
3855
3856         return count;
3857 }
3858
3859 static ssize_t show_retry_rate(struct device *d,
3860                                struct device_attribute *attr, char *buf)
3861 {
3862         struct iwl_priv *priv = dev_get_drvdata(d);
3863         return sprintf(buf, "%d", priv->retry_rate);
3864 }
3865
3866 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
3867                    store_retry_rate);
3868
3869 static ssize_t store_power_level(struct device *d,
3870                                  struct device_attribute *attr,
3871                                  const char *buf, size_t count)
3872 {
3873         struct iwl_priv *priv = dev_get_drvdata(d);
3874         int ret;
3875         unsigned long mode;
3876
3877
3878         mutex_lock(&priv->mutex);
3879
3880         if (!iwl_is_ready(priv)) {
3881                 ret = -EAGAIN;
3882                 goto out;
3883         }
3884
3885         ret = strict_strtoul(buf, 10, &mode);
3886         if (ret)
3887                 goto out;
3888
3889         ret = iwl_power_set_user_mode(priv, mode);
3890         if (ret) {
3891                 IWL_DEBUG_MAC80211("failed setting power mode.\n");
3892                 goto out;
3893         }
3894         ret = count;
3895
3896  out:
3897         mutex_unlock(&priv->mutex);
3898         return ret;
3899 }
3900
3901 static ssize_t show_power_level(struct device *d,
3902                                 struct device_attribute *attr, char *buf)
3903 {
3904         struct iwl_priv *priv = dev_get_drvdata(d);
3905         int mode = priv->power_data.user_power_setting;
3906         int system = priv->power_data.system_power_setting;
3907         int level = priv->power_data.power_mode;
3908         char *p = buf;
3909
3910         switch (system) {
3911         case IWL_POWER_SYS_AUTO:
3912                 p += sprintf(p, "SYSTEM:auto");
3913                 break;
3914         case IWL_POWER_SYS_AC:
3915                 p += sprintf(p, "SYSTEM:ac");
3916                 break;
3917         case IWL_POWER_SYS_BATTERY:
3918                 p += sprintf(p, "SYSTEM:battery");
3919                 break;
3920         }
3921
3922         p += sprintf(p, "\tMODE:%s", (mode < IWL_POWER_AUTO)?"fixed":"auto");
3923         p += sprintf(p, "\tINDEX:%d", level);
3924         p += sprintf(p, "\n");
3925         return p - buf + 1;
3926 }
3927
3928 static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR, show_power_level,
3929                    store_power_level);
3930
3931 static ssize_t show_channels(struct device *d,
3932                              struct device_attribute *attr, char *buf)
3933 {
3934
3935         struct iwl_priv *priv = dev_get_drvdata(d);
3936         struct ieee80211_channel *channels = NULL;
3937         const struct ieee80211_supported_band *supp_band = NULL;
3938         int len = 0, i;
3939         int count = 0;
3940
3941         if (!test_bit(STATUS_GEO_CONFIGURED, &priv->status))
3942                 return -EAGAIN;
3943
3944         supp_band = iwl_get_hw_mode(priv, IEEE80211_BAND_2GHZ);
3945         channels = supp_band->channels;
3946         count = supp_band->n_channels;
3947
3948         len += sprintf(&buf[len],
3949                         "Displaying %d channels in 2.4GHz band "
3950                         "(802.11bg):\n", count);
3951
3952         for (i = 0; i < count; i++)
3953                 len += sprintf(&buf[len], "%d: %ddBm: BSS%s%s, %s.\n",
3954                                 ieee80211_frequency_to_channel(
3955                                 channels[i].center_freq),
3956                                 channels[i].max_power,
3957                                 channels[i].flags & IEEE80211_CHAN_RADAR ?
3958                                 " (IEEE 802.11h required)" : "",
3959                                 (!(channels[i].flags & IEEE80211_CHAN_NO_IBSS)
3960                                 || (channels[i].flags &
3961                                 IEEE80211_CHAN_RADAR)) ? "" :
3962                                 ", IBSS",
3963                                 channels[i].flags &
3964                                 IEEE80211_CHAN_PASSIVE_SCAN ?
3965                                 "passive only" : "active/passive");
3966
3967         supp_band = iwl_get_hw_mode(priv, IEEE80211_BAND_5GHZ);
3968         channels = supp_band->channels;
3969         count = supp_band->n_channels;
3970
3971         len += sprintf(&buf[len], "Displaying %d channels in 5.2GHz band "
3972                         "(802.11a):\n", count);
3973
3974         for (i = 0; i < count; i++)
3975                 len += sprintf(&buf[len], "%d: %ddBm: BSS%s%s, %s.\n",
3976                                 ieee80211_frequency_to_channel(
3977                                 channels[i].center_freq),
3978                                 channels[i].max_power,
3979                                 channels[i].flags & IEEE80211_CHAN_RADAR ?
3980                                 " (IEEE 802.11h required)" : "",
3981                                 ((channels[i].flags & IEEE80211_CHAN_NO_IBSS)
3982                                 || (channels[i].flags &
3983                                 IEEE80211_CHAN_RADAR)) ? "" :
3984                                 ", IBSS",
3985                                 channels[i].flags &
3986                                 IEEE80211_CHAN_PASSIVE_SCAN ?
3987                                 "passive only" : "active/passive");
3988
3989         return len;
3990 }
3991
3992 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
3993
3994 static ssize_t show_statistics(struct device *d,
3995                                struct device_attribute *attr, char *buf)
3996 {
3997         struct iwl_priv *priv = dev_get_drvdata(d);
3998         u32 size = sizeof(struct iwl_notif_statistics);
3999         u32 len = 0, ofs = 0;
4000         u8 *data = (u8 *)&priv->statistics;
4001         int rc = 0;
4002
4003         if (!iwl_is_alive(priv))
4004                 return -EAGAIN;
4005
4006         mutex_lock(&priv->mutex);
4007         rc = iwl_send_statistics_request(priv, 0);
4008         mutex_unlock(&priv->mutex);
4009
4010         if (rc) {
4011                 len = sprintf(buf,
4012                               "Error sending statistics request: 0x%08X\n", rc);
4013                 return len;
4014         }
4015
4016         while (size && (PAGE_SIZE - len)) {
4017                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
4018                                    PAGE_SIZE - len, 1);
4019                 len = strlen(buf);
4020                 if (PAGE_SIZE - len)
4021                         buf[len++] = '\n';
4022
4023                 ofs += 16;
4024                 size -= min(size, 16U);
4025         }
4026
4027         return len;
4028 }
4029
4030 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
4031
4032 static ssize_t show_status(struct device *d,
4033                            struct device_attribute *attr, char *buf)
4034 {
4035         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
4036         if (!iwl_is_alive(priv))
4037                 return -EAGAIN;
4038         return sprintf(buf, "0x%08x\n", (int)priv->status);
4039 }
4040
4041 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
4042
4043 /*****************************************************************************
4044  *
4045  * driver setup and teardown
4046  *
4047  *****************************************************************************/
4048
4049 static void iwl_setup_deferred_work(struct iwl_priv *priv)
4050 {
4051         priv->workqueue = create_workqueue(DRV_NAME);
4052
4053         init_waitqueue_head(&priv->wait_command_queue);
4054
4055         INIT_WORK(&priv->up, iwl_bg_up);
4056         INIT_WORK(&priv->restart, iwl_bg_restart);
4057         INIT_WORK(&priv->rx_replenish, iwl_bg_rx_replenish);
4058         INIT_WORK(&priv->rf_kill, iwl_bg_rf_kill);
4059         INIT_WORK(&priv->beacon_update, iwl_bg_beacon_update);
4060         INIT_WORK(&priv->set_monitor, iwl_bg_set_monitor);
4061         INIT_WORK(&priv->run_time_calib_work, iwl_bg_run_time_calib_work);
4062         INIT_DELAYED_WORK(&priv->init_alive_start, iwl_bg_init_alive_start);
4063         INIT_DELAYED_WORK(&priv->alive_start, iwl_bg_alive_start);
4064
4065         iwl_setup_scan_deferred_work(priv);
4066         iwl_setup_power_deferred_work(priv);
4067
4068         if (priv->cfg->ops->lib->setup_deferred_work)
4069                 priv->cfg->ops->lib->setup_deferred_work(priv);
4070
4071         init_timer(&priv->statistics_periodic);
4072         priv->statistics_periodic.data = (unsigned long)priv;
4073         priv->statistics_periodic.function = iwl_bg_statistics_periodic;
4074
4075         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
4076                      iwl_irq_tasklet, (unsigned long)priv);
4077 }
4078
4079 static void iwl_cancel_deferred_work(struct iwl_priv *priv)
4080 {
4081         if (priv->cfg->ops->lib->cancel_deferred_work)
4082                 priv->cfg->ops->lib->cancel_deferred_work(priv);
4083
4084         cancel_delayed_work_sync(&priv->init_alive_start);
4085         cancel_delayed_work(&priv->scan_check);
4086         cancel_delayed_work_sync(&priv->set_power_save);
4087         cancel_delayed_work(&priv->alive_start);
4088         cancel_work_sync(&priv->beacon_update);
4089         del_timer_sync(&priv->statistics_periodic);
4090 }
4091
4092 static struct attribute *iwl_sysfs_entries[] = {
4093         &dev_attr_channels.attr,
4094         &dev_attr_flags.attr,
4095         &dev_attr_filter_flags.attr,
4096 #ifdef CONFIG_IWLAGN_SPECTRUM_MEASUREMENT
4097         &dev_attr_measurement.attr,
4098 #endif
4099         &dev_attr_power_level.attr,
4100         &dev_attr_retry_rate.attr,
4101         &dev_attr_statistics.attr,
4102         &dev_attr_status.attr,
4103         &dev_attr_temperature.attr,
4104         &dev_attr_tx_power.attr,
4105 #ifdef CONFIG_IWLWIFI_DEBUG
4106         &dev_attr_debug_level.attr,
4107 #endif
4108         &dev_attr_version.attr,
4109
4110         NULL
4111 };
4112
4113 static struct attribute_group iwl_attribute_group = {
4114         .name = NULL,           /* put in device directory */
4115         .attrs = iwl_sysfs_entries,
4116 };
4117
4118 static struct ieee80211_ops iwl_hw_ops = {
4119         .tx = iwl_mac_tx,
4120         .start = iwl_mac_start,
4121         .stop = iwl_mac_stop,
4122         .add_interface = iwl_mac_add_interface,
4123         .remove_interface = iwl_mac_remove_interface,
4124         .config = iwl_mac_config,
4125         .config_interface = iwl_mac_config_interface,
4126         .configure_filter = iwl_configure_filter,
4127         .set_key = iwl_mac_set_key,
4128         .update_tkip_key = iwl_mac_update_tkip_key,
4129         .get_stats = iwl_mac_get_stats,
4130         .get_tx_stats = iwl_mac_get_tx_stats,
4131         .conf_tx = iwl_mac_conf_tx,
4132         .reset_tsf = iwl_mac_reset_tsf,
4133         .bss_info_changed = iwl_bss_info_changed,
4134         .ampdu_action = iwl_mac_ampdu_action,
4135         .hw_scan = iwl_mac_hw_scan
4136 };
4137
4138 static int iwl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
4139 {
4140         int err = 0;
4141         struct iwl_priv *priv;
4142         struct ieee80211_hw *hw;
4143         struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
4144         unsigned long flags;
4145
4146         /************************
4147          * 1. Allocating HW data
4148          ************************/
4149
4150         /* Disabling hardware scan means that mac80211 will perform scans
4151          * "the hard way", rather than using device's scan. */
4152         if (cfg->mod_params->disable_hw_scan) {
4153                 if (cfg->mod_params->debug & IWL_DL_INFO)
4154                         dev_printk(KERN_DEBUG, &(pdev->dev),
4155                                    "Disabling hw_scan\n");
4156                 iwl_hw_ops.hw_scan = NULL;
4157         }
4158
4159         hw = iwl_alloc_all(cfg, &iwl_hw_ops);
4160         if (!hw) {
4161                 err = -ENOMEM;
4162                 goto out;
4163         }
4164         priv = hw->priv;
4165         /* At this point both hw and priv are allocated. */
4166
4167         SET_IEEE80211_DEV(hw, &pdev->dev);
4168
4169         IWL_DEBUG_INFO("*** LOAD DRIVER ***\n");
4170         priv->cfg = cfg;
4171         priv->pci_dev = pdev;
4172
4173 #ifdef CONFIG_IWLWIFI_DEBUG
4174         priv->debug_level = priv->cfg->mod_params->debug;
4175         atomic_set(&priv->restrict_refcnt, 0);
4176 #endif
4177
4178         /**************************
4179          * 2. Initializing PCI bus
4180          **************************/
4181         if (pci_enable_device(pdev)) {
4182                 err = -ENODEV;
4183                 goto out_ieee80211_free_hw;
4184         }
4185
4186         pci_set_master(pdev);
4187
4188         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(36));
4189         if (!err)
4190                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(36));
4191         if (err) {
4192                 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
4193                 if (!err)
4194                         err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
4195                 /* both attempts failed: */
4196                 if (err) {
4197                         printk(KERN_WARNING "%s: No suitable DMA available.\n",
4198                                 DRV_NAME);
4199                         goto out_pci_disable_device;
4200                 }
4201         }
4202
4203         err = pci_request_regions(pdev, DRV_NAME);
4204         if (err)
4205                 goto out_pci_disable_device;
4206
4207         pci_set_drvdata(pdev, priv);
4208
4209
4210         /***********************
4211          * 3. Read REV register
4212          ***********************/
4213         priv->hw_base = pci_iomap(pdev, 0, 0);
4214         if (!priv->hw_base) {
4215                 err = -ENODEV;
4216                 goto out_pci_release_regions;
4217         }
4218
4219         IWL_DEBUG_INFO("pci_resource_len = 0x%08llx\n",
4220                 (unsigned long long) pci_resource_len(pdev, 0));
4221         IWL_DEBUG_INFO("pci_resource_base = %p\n", priv->hw_base);
4222
4223         iwl_hw_detect(priv);
4224         printk(KERN_INFO DRV_NAME
4225                 ": Detected Intel Wireless WiFi Link %s REV=0x%X\n",
4226                 priv->cfg->name, priv->hw_rev);
4227
4228         /* We disable the RETRY_TIMEOUT register (0x41) to keep
4229          * PCI Tx retries from interfering with C3 CPU state */
4230         pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
4231
4232         /* amp init */
4233         err = priv->cfg->ops->lib->apm_ops.init(priv);
4234         if (err < 0) {
4235                 IWL_DEBUG_INFO("Failed to init APMG\n");
4236                 goto out_iounmap;
4237         }
4238         /*****************
4239          * 4. Read EEPROM
4240          *****************/
4241         /* Read the EEPROM */
4242         err = iwl_eeprom_init(priv);
4243         if (err) {
4244                 IWL_ERROR("Unable to init EEPROM\n");
4245                 goto out_iounmap;
4246         }
4247         err = iwl_eeprom_check_version(priv);
4248         if (err)
4249                 goto out_iounmap;
4250
4251         /* extract MAC Address */
4252         iwl_eeprom_get_mac(priv, priv->mac_addr);
4253         IWL_DEBUG_INFO("MAC address: %pM\n", priv->mac_addr);
4254         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
4255
4256         /************************
4257          * 5. Setup HW constants
4258          ************************/
4259         if (iwl_set_hw_params(priv)) {
4260                 IWL_ERROR("failed to set hw parameters\n");
4261                 goto out_free_eeprom;
4262         }
4263
4264         /*******************
4265          * 6. Setup priv
4266          *******************/
4267
4268         err = iwl_init_drv(priv);
4269         if (err)
4270                 goto out_free_eeprom;
4271         /* At this point both hw and priv are initialized. */
4272
4273         /**********************************
4274          * 7. Initialize module parameters
4275          **********************************/
4276
4277         /* Disable radio (SW RF KILL) via parameter when loading driver */
4278         if (priv->cfg->mod_params->disable) {
4279                 set_bit(STATUS_RF_KILL_SW, &priv->status);
4280                 IWL_DEBUG_INFO("Radio disabled.\n");
4281         }
4282
4283         /********************
4284          * 8. Setup services
4285          ********************/
4286         spin_lock_irqsave(&priv->lock, flags);
4287         iwl_disable_interrupts(priv);
4288         spin_unlock_irqrestore(&priv->lock, flags);
4289
4290         err = sysfs_create_group(&pdev->dev.kobj, &iwl_attribute_group);
4291         if (err) {
4292                 IWL_ERROR("failed to create sysfs device attributes\n");
4293                 goto out_uninit_drv;
4294         }
4295
4296
4297         iwl_setup_deferred_work(priv);
4298         iwl_setup_rx_handlers(priv);
4299
4300         /********************
4301          * 9. Conclude
4302          ********************/
4303         pci_save_state(pdev);
4304         pci_disable_device(pdev);
4305
4306         /**********************************
4307          * 10. Setup and register mac80211
4308          **********************************/
4309
4310         err = iwl_setup_mac(priv);
4311         if (err)
4312                 goto out_remove_sysfs;
4313
4314         err = iwl_dbgfs_register(priv, DRV_NAME);
4315         if (err)
4316                 IWL_ERROR("failed to create debugfs files\n");
4317
4318         err = iwl_rfkill_init(priv);
4319         if (err)
4320                 IWL_ERROR("Unable to initialize RFKILL system. "
4321                                   "Ignoring error: %d\n", err);
4322         iwl_power_initialize(priv);
4323         return 0;
4324
4325  out_remove_sysfs:
4326         sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
4327  out_uninit_drv:
4328         iwl_uninit_drv(priv);
4329  out_free_eeprom:
4330         iwl_eeprom_free(priv);
4331  out_iounmap:
4332         pci_iounmap(pdev, priv->hw_base);
4333  out_pci_release_regions:
4334         pci_release_regions(pdev);
4335         pci_set_drvdata(pdev, NULL);
4336  out_pci_disable_device:
4337         pci_disable_device(pdev);
4338  out_ieee80211_free_hw:
4339         ieee80211_free_hw(priv->hw);
4340  out:
4341         return err;
4342 }
4343
4344 static void __devexit iwl_pci_remove(struct pci_dev *pdev)
4345 {
4346         struct iwl_priv *priv = pci_get_drvdata(pdev);
4347         unsigned long flags;
4348
4349         if (!priv)
4350                 return;
4351
4352         IWL_DEBUG_INFO("*** UNLOAD DRIVER ***\n");
4353
4354         iwl_dbgfs_unregister(priv);
4355         sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
4356
4357         /* ieee80211_unregister_hw call wil cause iwl_mac_stop to
4358          * to be called and iwl_down since we are removing the device
4359          * we need to set STATUS_EXIT_PENDING bit.
4360          */
4361         set_bit(STATUS_EXIT_PENDING, &priv->status);
4362         if (priv->mac80211_registered) {
4363                 ieee80211_unregister_hw(priv->hw);
4364                 priv->mac80211_registered = 0;
4365         } else {
4366                 iwl_down(priv);
4367         }
4368
4369         /* make sure we flush any pending irq or
4370          * tasklet for the driver
4371          */
4372         spin_lock_irqsave(&priv->lock, flags);
4373         iwl_disable_interrupts(priv);
4374         spin_unlock_irqrestore(&priv->lock, flags);
4375
4376         iwl_synchronize_irq(priv);
4377
4378         iwl_rfkill_unregister(priv);
4379         iwl_dealloc_ucode_pci(priv);
4380
4381         if (priv->rxq.bd)
4382                 iwl_rx_queue_free(priv, &priv->rxq);
4383         iwl_hw_txq_ctx_free(priv);
4384
4385         iwl_clear_stations_table(priv);
4386         iwl_eeprom_free(priv);
4387
4388
4389         /*netif_stop_queue(dev); */
4390         flush_workqueue(priv->workqueue);
4391
4392         /* ieee80211_unregister_hw calls iwl_mac_stop, which flushes
4393          * priv->workqueue... so we can't take down the workqueue
4394          * until now... */
4395         destroy_workqueue(priv->workqueue);
4396         priv->workqueue = NULL;
4397
4398         pci_iounmap(pdev, priv->hw_base);
4399         pci_release_regions(pdev);
4400         pci_disable_device(pdev);
4401         pci_set_drvdata(pdev, NULL);
4402
4403         iwl_uninit_drv(priv);
4404
4405         if (priv->ibss_beacon)
4406                 dev_kfree_skb(priv->ibss_beacon);
4407
4408         ieee80211_free_hw(priv->hw);
4409 }
4410
4411 #ifdef CONFIG_PM
4412
4413 static int iwl_pci_suspend(struct pci_dev *pdev, pm_message_t state)
4414 {
4415         struct iwl_priv *priv = pci_get_drvdata(pdev);
4416
4417         if (priv->is_open) {
4418                 set_bit(STATUS_IN_SUSPEND, &priv->status);
4419                 iwl_mac_stop(priv->hw);
4420                 priv->is_open = 1;
4421         }
4422
4423         pci_set_power_state(pdev, PCI_D3hot);
4424
4425         return 0;
4426 }
4427
4428 static int iwl_pci_resume(struct pci_dev *pdev)
4429 {
4430         struct iwl_priv *priv = pci_get_drvdata(pdev);
4431
4432         pci_set_power_state(pdev, PCI_D0);
4433
4434         if (priv->is_open)
4435                 iwl_mac_start(priv->hw);
4436
4437         clear_bit(STATUS_IN_SUSPEND, &priv->status);
4438         return 0;
4439 }
4440
4441 #endif /* CONFIG_PM */
4442
4443 /*****************************************************************************
4444  *
4445  * driver and module entry point
4446  *
4447  *****************************************************************************/
4448
4449 /* Hardware specific file defines the PCI IDs table for that hardware module */
4450 static struct pci_device_id iwl_hw_card_ids[] = {
4451 #ifdef CONFIG_IWL4965
4452         {IWL_PCI_DEVICE(0x4229, PCI_ANY_ID, iwl4965_agn_cfg)},
4453         {IWL_PCI_DEVICE(0x4230, PCI_ANY_ID, iwl4965_agn_cfg)},
4454 #endif /* CONFIG_IWL4965 */
4455 #ifdef CONFIG_IWL5000
4456         {IWL_PCI_DEVICE(0x4232, 0x1205, iwl5100_bg_cfg)},
4457         {IWL_PCI_DEVICE(0x4232, 0x1305, iwl5100_bg_cfg)},
4458         {IWL_PCI_DEVICE(0x4232, 0x1206, iwl5100_abg_cfg)},
4459         {IWL_PCI_DEVICE(0x4232, 0x1306, iwl5100_abg_cfg)},
4460         {IWL_PCI_DEVICE(0x4232, 0x1326, iwl5100_abg_cfg)},
4461         {IWL_PCI_DEVICE(0x4237, 0x1216, iwl5100_abg_cfg)},
4462         {IWL_PCI_DEVICE(0x4232, PCI_ANY_ID, iwl5100_agn_cfg)},
4463         {IWL_PCI_DEVICE(0x4235, PCI_ANY_ID, iwl5300_agn_cfg)},
4464         {IWL_PCI_DEVICE(0x4236, PCI_ANY_ID, iwl5300_agn_cfg)},
4465         {IWL_PCI_DEVICE(0x4237, PCI_ANY_ID, iwl5100_agn_cfg)},
4466 /* 5350 WiFi/WiMax */
4467         {IWL_PCI_DEVICE(0x423A, 0x1001, iwl5350_agn_cfg)},
4468         {IWL_PCI_DEVICE(0x423A, 0x1021, iwl5350_agn_cfg)},
4469         {IWL_PCI_DEVICE(0x423B, 0x1011, iwl5350_agn_cfg)},
4470 #endif /* CONFIG_IWL5000 */
4471         {0}
4472 };
4473 MODULE_DEVICE_TABLE(pci, iwl_hw_card_ids);
4474
4475 static struct pci_driver iwl_driver = {
4476         .name = DRV_NAME,
4477         .id_table = iwl_hw_card_ids,
4478         .probe = iwl_pci_probe,
4479         .remove = __devexit_p(iwl_pci_remove),
4480 #ifdef CONFIG_PM
4481         .suspend = iwl_pci_suspend,
4482         .resume = iwl_pci_resume,
4483 #endif
4484 };
4485
4486 static int __init iwl_init(void)
4487 {
4488
4489         int ret;
4490         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
4491         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
4492
4493         ret = iwlagn_rate_control_register();
4494         if (ret) {
4495                 IWL_ERROR("Unable to register rate control algorithm: %d\n", ret);
4496                 return ret;
4497         }
4498
4499         ret = pci_register_driver(&iwl_driver);
4500         if (ret) {
4501                 IWL_ERROR("Unable to initialize PCI module\n");
4502                 goto error_register;
4503         }
4504
4505         return ret;
4506
4507 error_register:
4508         iwlagn_rate_control_unregister();
4509         return ret;
4510 }
4511
4512 static void __exit iwl_exit(void)
4513 {
4514         pci_unregister_driver(&iwl_driver);
4515         iwlagn_rate_control_unregister();
4516 }
4517
4518 module_exit(iwl_exit);
4519 module_init(iwl_init);