SAFE public projects git trees. - safe/jmp/linux-2.6/blob - 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         iwl_send_statistics_request(priv, CMD_ASYNC);
1157 }
1158
1159 static void iwl_rx_beacon_notif(struct iwl_priv *priv,
1160                                 struct iwl_rx_mem_buffer *rxb)
1161 {
1162 #ifdef CONFIG_IWLWIFI_DEBUG
1163         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
1164         struct iwl4965_beacon_notif *beacon = &(pkt->u.beacon_status);
1165         u8 rate = iwl_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
1166
1167         IWL_DEBUG_RX("beacon status %x retries %d iss %d "
1168                 "tsf %d %d rate %d\n",
1169                 le32_to_cpu(beacon->beacon_notify_hdr.u.status) & TX_STATUS_MSK,
1170                 beacon->beacon_notify_hdr.failure_frame,
1171                 le32_to_cpu(beacon->ibss_mgr_status),
1172                 le32_to_cpu(beacon->high_tsf),
1173                 le32_to_cpu(beacon->low_tsf), rate);
1174 #endif
1175
1176         if ((priv->iw_mode == NL80211_IFTYPE_AP) &&
1177             (!test_bit(STATUS_EXIT_PENDING, &priv->status)))
1178                 queue_work(priv->workqueue, &priv->beacon_update);
1179 }
1180
1181 /* Handle notification from uCode that card's power state is changing
1182  * due to software, hardware, or critical temperature RFKILL */
1183 static void iwl_rx_card_state_notif(struct iwl_priv *priv,
1184                                     struct iwl_rx_mem_buffer *rxb)
1185 {
1186         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
1187         u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
1188         unsigned long status = priv->status;
1189
1190         IWL_DEBUG_RF_KILL("Card state received: HW:%s SW:%s\n",
1191                           (flags & HW_CARD_DISABLED) ? "Kill" : "On",
1192                           (flags & SW_CARD_DISABLED) ? "Kill" : "On");
1193
1194         if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED |
1195                      RF_CARD_DISABLED)) {
1196
1197                 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
1198                             CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
1199
1200                 if (!iwl_grab_nic_access(priv)) {
1201                         iwl_write_direct32(
1202                                 priv, HBUS_TARG_MBX_C,
1203                                 HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
1204
1205                         iwl_release_nic_access(priv);
1206                 }
1207
1208                 if (!(flags & RXON_CARD_DISABLED)) {
1209                         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
1210                                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
1211                         if (!iwl_grab_nic_access(priv)) {
1212                                 iwl_write_direct32(
1213                                         priv, HBUS_TARG_MBX_C,
1214                                         HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
1215
1216                                 iwl_release_nic_access(priv);
1217                         }
1218                 }
1219
1220                 if (flags & RF_CARD_DISABLED) {
1221                         iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
1222                                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
1223                         iwl_read32(priv, CSR_UCODE_DRV_GP1);
1224                         if (!iwl_grab_nic_access(priv))
1225                                 iwl_release_nic_access(priv);
1226                 }
1227         }
1228
1229         if (flags & HW_CARD_DISABLED)
1230                 set_bit(STATUS_RF_KILL_HW, &priv->status);
1231         else
1232                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
1233
1234
1235         if (flags & SW_CARD_DISABLED)
1236                 set_bit(STATUS_RF_KILL_SW, &priv->status);
1237         else
1238                 clear_bit(STATUS_RF_KILL_SW, &priv->status);
1239
1240         if (!(flags & RXON_CARD_DISABLED))
1241                 iwl_scan_cancel(priv);
1242
1243         if ((test_bit(STATUS_RF_KILL_HW, &status) !=
1244              test_bit(STATUS_RF_KILL_HW, &priv->status)) ||
1245             (test_bit(STATUS_RF_KILL_SW, &status) !=
1246              test_bit(STATUS_RF_KILL_SW, &priv->status)))
1247                 queue_work(priv->workqueue, &priv->rf_kill);
1248         else
1249                 wake_up_interruptible(&priv->wait_command_queue);
1250 }
1251
1252 int iwl_set_pwr_src(struct iwl_priv *priv, enum iwl_pwr_src src)
1253 {
1254         int ret;
1255         unsigned long flags;
1256
1257         spin_lock_irqsave(&priv->lock, flags);
1258         ret = iwl_grab_nic_access(priv);
1259         if (ret)
1260                 goto err;
1261
1262         if (src == IWL_PWR_SRC_VAUX) {
1263                 u32 val;
1264                 ret = pci_read_config_dword(priv->pci_dev, PCI_CFG_POWER_SOURCE,
1265                                             &val);
1266
1267                 if (val & PCI_CFG_PMC_PME_FROM_D3COLD_SUPPORT)
1268                         iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
1269                                                APMG_PS_CTRL_VAL_PWR_SRC_VAUX,
1270                                                ~APMG_PS_CTRL_MSK_PWR_SRC);
1271         } else {
1272                 iwl_set_bits_mask_prph(priv, APMG_PS_CTRL_REG,
1273                                        APMG_PS_CTRL_VAL_PWR_SRC_VMAIN,
1274                                        ~APMG_PS_CTRL_MSK_PWR_SRC);
1275         }
1276
1277         iwl_release_nic_access(priv);
1278 err:
1279         spin_unlock_irqrestore(&priv->lock, flags);
1280         return ret;
1281 }
1282
1283 /**
1284  * iwl_setup_rx_handlers - Initialize Rx handler callbacks
1285  *
1286  * Setup the RX handlers for each of the reply types sent from the uCode
1287  * to the host.
1288  *
1289  * This function chains into the hardware specific files for them to setup
1290  * any hardware specific handlers as well.
1291  */
1292 static void iwl_setup_rx_handlers(struct iwl_priv *priv)
1293 {
1294         priv->rx_handlers[REPLY_ALIVE] = iwl_rx_reply_alive;
1295         priv->rx_handlers[REPLY_ERROR] = iwl_rx_reply_error;
1296         priv->rx_handlers[CHANNEL_SWITCH_NOTIFICATION] = iwl_rx_csa;
1297         priv->rx_handlers[SPECTRUM_MEASURE_NOTIFICATION] =
1298             iwl_rx_spectrum_measure_notif;
1299         priv->rx_handlers[PM_SLEEP_NOTIFICATION] = iwl_rx_pm_sleep_notif;
1300         priv->rx_handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
1301             iwl_rx_pm_debug_statistics_notif;
1302         priv->rx_handlers[BEACON_NOTIFICATION] = iwl_rx_beacon_notif;
1303
1304         /*
1305          * The same handler is used for both the REPLY to a discrete
1306          * statistics request from the host as well as for the periodic
1307          * statistics notifications (after received beacons) from the uCode.
1308          */
1309         priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl_rx_statistics;
1310         priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl_rx_statistics;
1311
1312         iwl_setup_rx_scan_handlers(priv);
1313
1314         /* status change handler */
1315         priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl_rx_card_state_notif;
1316
1317         priv->rx_handlers[MISSED_BEACONS_NOTIFICATION] =
1318             iwl_rx_missed_beacon_notif;
1319         /* Rx handlers */
1320         priv->rx_handlers[REPLY_RX_PHY_CMD] = iwl_rx_reply_rx_phy;
1321         priv->rx_handlers[REPLY_RX_MPDU_CMD] = iwl_rx_reply_rx;
1322         /* block ack */
1323         priv->rx_handlers[REPLY_COMPRESSED_BA] = iwl_rx_reply_compressed_ba;
1324         /* Set up hardware specific Rx handlers */
1325         priv->cfg->ops->lib->rx_handler_setup(priv);
1326 }
1327
1328 /*
1329  * this should be called while priv->lock is locked
1330 */
1331 static void __iwl_rx_replenish(struct iwl_priv *priv)
1332 {
1333         iwl_rx_allocate(priv);
1334         iwl_rx_queue_restock(priv);
1335 }
1336
1337
1338 /**
1339  * iwl_rx_handle - Main entry function for receiving responses from uCode
1340  *
1341  * Uses the priv->rx_handlers callback function array to invoke
1342  * the appropriate handlers, including command responses,
1343  * frame-received notifications, and other notifications.
1344  */
1345 void iwl_rx_handle(struct iwl_priv *priv)
1346 {
1347         struct iwl_rx_mem_buffer *rxb;
1348         struct iwl_rx_packet *pkt;
1349         struct iwl_rx_queue *rxq = &priv->rxq;
1350         u32 r, i;
1351         int reclaim;
1352         unsigned long flags;
1353         u8 fill_rx = 0;
1354         u32 count = 8;
1355
1356         /* uCode's read index (stored in shared DRAM) indicates the last Rx
1357          * buffer that the driver may process (last buffer filled by ucode). */
1358         r = priv->cfg->ops->lib->shared_mem_rx_idx(priv);
1359         i = rxq->read;
1360
1361         /* Rx interrupt, but nothing sent from uCode */
1362         if (i == r)
1363                 IWL_DEBUG(IWL_DL_RX, "r = %d, i = %d\n", r, i);
1364
1365         if (iwl_rx_queue_space(rxq) > (RX_QUEUE_SIZE / 2))
1366                 fill_rx = 1;
1367
1368         while (i != r) {
1369                 rxb = rxq->queue[i];
1370
1371                 /* If an RXB doesn't have a Rx queue slot associated with it,
1372                  * then a bug has been introduced in the queue refilling
1373                  * routines -- catch it here */
1374                 BUG_ON(rxb == NULL);
1375
1376                 rxq->queue[i] = NULL;
1377
1378                 pci_dma_sync_single_for_cpu(priv->pci_dev, rxb->dma_addr,
1379                                             priv->hw_params.rx_buf_size,
1380                                             PCI_DMA_FROMDEVICE);
1381                 pkt = (struct iwl_rx_packet *)rxb->skb->data;
1382
1383                 /* Reclaim a command buffer only if this packet is a response
1384                  *   to a (driver-originated) command.
1385                  * If the packet (e.g. Rx frame) originated from uCode,
1386                  *   there is no command buffer to reclaim.
1387                  * Ucode should set SEQ_RX_FRAME bit if ucode-originated,
1388                  *   but apparently a few don't get set; catch them here. */
1389                 reclaim = !(pkt->hdr.sequence & SEQ_RX_FRAME) &&
1390                         (pkt->hdr.cmd != REPLY_RX_PHY_CMD) &&
1391                         (pkt->hdr.cmd != REPLY_RX) &&
1392                         (pkt->hdr.cmd != REPLY_RX_MPDU_CMD) &&
1393                         (pkt->hdr.cmd != REPLY_COMPRESSED_BA) &&
1394                         (pkt->hdr.cmd != STATISTICS_NOTIFICATION) &&
1395                         (pkt->hdr.cmd != REPLY_TX);
1396
1397                 /* Based on type of command response or notification,
1398                  *   handle those that need handling via function in
1399                  *   rx_handlers table.  See iwl_setup_rx_handlers() */
1400                 if (priv->rx_handlers[pkt->hdr.cmd]) {
1401                         IWL_DEBUG(IWL_DL_RX, "r = %d, i = %d, %s, 0x%02x\n", r,
1402                                 i, get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
1403                         priv->rx_handlers[pkt->hdr.cmd] (priv, rxb);
1404                 } else {
1405                         /* No handling needed */
1406                         IWL_DEBUG(IWL_DL_RX,
1407                                 "r %d i %d No handler needed for %s, 0x%02x\n",
1408                                 r, i, get_cmd_string(pkt->hdr.cmd),
1409                                 pkt->hdr.cmd);
1410                 }
1411
1412                 if (reclaim) {
1413                         /* Invoke any callbacks, transfer the skb to caller, and
1414                          * fire off the (possibly) blocking iwl_send_cmd()
1415                          * as we reclaim the driver command queue */
1416                         if (rxb && rxb->skb)
1417                                 iwl_tx_cmd_complete(priv, rxb);
1418                         else
1419                                 IWL_WARNING("Claim null rxb?\n");
1420                 }
1421
1422                 /* For now we just don't re-use anything.  We can tweak this
1423                  * later to try and re-use notification packets and SKBs that
1424                  * fail to Rx correctly */
1425                 if (rxb->skb != NULL) {
1426                         priv->alloc_rxb_skb--;
1427                         dev_kfree_skb_any(rxb->skb);
1428                         rxb->skb = NULL;
1429                 }
1430
1431                 pci_unmap_single(priv->pci_dev, rxb->dma_addr,
1432                                  priv->hw_params.rx_buf_size,
1433                                  PCI_DMA_FROMDEVICE);
1434                 spin_lock_irqsave(&rxq->lock, flags);
1435                 list_add_tail(&rxb->list, &priv->rxq.rx_used);
1436                 spin_unlock_irqrestore(&rxq->lock, flags);
1437                 i = (i + 1) & RX_QUEUE_MASK;
1438                 /* If there are a lot of unused frames,
1439                  * restock the Rx queue so ucode wont assert. */
1440                 if (fill_rx) {
1441                         count++;
1442                         if (count >= 8) {
1443                                 priv->rxq.read = i;
1444                                 __iwl_rx_replenish(priv);
1445                                 count = 0;
1446                         }
1447                 }
1448         }
1449
1450         /* Backtrack one entry */
1451         priv->rxq.read = i;
1452         iwl_rx_queue_restock(priv);
1453 }
1454
1455 #ifdef CONFIG_IWLWIFI_DEBUG
1456 static void iwl_print_rx_config_cmd(struct iwl_priv *priv)
1457 {
1458         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
1459
1460         IWL_DEBUG_RADIO("RX CONFIG:\n");
1461         iwl_print_hex_dump(priv, IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
1462         IWL_DEBUG_RADIO("u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
1463         IWL_DEBUG_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
1464         IWL_DEBUG_RADIO("u32 filter_flags: 0x%08x\n",
1465                         le32_to_cpu(rxon->filter_flags));
1466         IWL_DEBUG_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type);
1467         IWL_DEBUG_RADIO("u8 ofdm_basic_rates: 0x%02x\n",
1468                         rxon->ofdm_basic_rates);
1469         IWL_DEBUG_RADIO("u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
1470         IWL_DEBUG_RADIO("u8[6] node_addr: %pM\n", rxon->node_addr);
1471         IWL_DEBUG_RADIO("u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
1472         IWL_DEBUG_RADIO("u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
1473 }
1474 #endif
1475
1476 static void iwl_enable_interrupts(struct iwl_priv *priv)
1477 {
1478         IWL_DEBUG_ISR("Enabling interrupts\n");
1479         set_bit(STATUS_INT_ENABLED, &priv->status);
1480         iwl_write32(priv, CSR_INT_MASK, CSR_INI_SET_MASK);
1481 }
1482
1483 /* call this function to flush any scheduled tasklet */
1484 static inline void iwl_synchronize_irq(struct iwl_priv *priv)
1485 {
1486         /* wait to make sure we flush pending tasklet*/
1487         synchronize_irq(priv->pci_dev->irq);
1488         tasklet_kill(&priv->irq_tasklet);
1489 }
1490
1491 static inline void iwl_disable_interrupts(struct iwl_priv *priv)
1492 {
1493         clear_bit(STATUS_INT_ENABLED, &priv->status);
1494
1495         /* disable interrupts from uCode/NIC to host */
1496         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
1497
1498         /* acknowledge/clear/reset any interrupts still pending
1499          * from uCode or flow handler (Rx/Tx DMA) */
1500         iwl_write32(priv, CSR_INT, 0xffffffff);
1501         iwl_write32(priv, CSR_FH_INT_STATUS, 0xffffffff);
1502         IWL_DEBUG_ISR("Disabled interrupts\n");
1503 }
1504
1505
1506 /**
1507  * iwl_irq_handle_error - called for HW or SW error interrupt from card
1508  */
1509 static void iwl_irq_handle_error(struct iwl_priv *priv)
1510 {
1511         /* Set the FW error flag -- cleared on iwl_down */
1512         set_bit(STATUS_FW_ERROR, &priv->status);
1513
1514         /* Cancel currently queued command. */
1515         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
1516
1517 #ifdef CONFIG_IWLWIFI_DEBUG
1518         if (priv->debug_level & IWL_DL_FW_ERRORS) {
1519                 iwl_dump_nic_error_log(priv);
1520                 iwl_dump_nic_event_log(priv);
1521                 iwl_print_rx_config_cmd(priv);
1522         }
1523 #endif
1524
1525         wake_up_interruptible(&priv->wait_command_queue);
1526
1527         /* Keep the restart process from trying to send host
1528          * commands by clearing the INIT status bit */
1529         clear_bit(STATUS_READY, &priv->status);
1530
1531         if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1532                 IWL_DEBUG(IWL_DL_FW_ERRORS,
1533                           "Restarting adapter due to uCode error.\n");
1534
1535                 if (iwl_is_associated(priv)) {
1536                         memcpy(&priv->recovery_rxon, &priv->active_rxon,
1537                                sizeof(priv->recovery_rxon));
1538                         priv->error_recovering = 1;
1539                 }
1540                 if (priv->cfg->mod_params->restart_fw)
1541                         queue_work(priv->workqueue, &priv->restart);
1542         }
1543 }
1544
1545 static void iwl_error_recovery(struct iwl_priv *priv)
1546 {
1547         unsigned long flags;
1548
1549         memcpy(&priv->staging_rxon, &priv->recovery_rxon,
1550                sizeof(priv->staging_rxon));
1551         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1552         iwl_commit_rxon(priv);
1553
1554         iwl_rxon_add_station(priv, priv->bssid, 1);
1555
1556         spin_lock_irqsave(&priv->lock, flags);
1557         priv->assoc_id = le16_to_cpu(priv->staging_rxon.assoc_id);
1558         priv->error_recovering = 0;
1559         spin_unlock_irqrestore(&priv->lock, flags);
1560 }
1561
1562 static void iwl_irq_tasklet(struct iwl_priv *priv)
1563 {
1564         u32 inta, handled = 0;
1565         u32 inta_fh;
1566         unsigned long flags;
1567 #ifdef CONFIG_IWLWIFI_DEBUG
1568         u32 inta_mask;
1569 #endif
1570
1571         spin_lock_irqsave(&priv->lock, flags);
1572
1573         /* Ack/clear/reset pending uCode interrupts.
1574          * Note:  Some bits in CSR_INT are "OR" of bits in CSR_FH_INT_STATUS,
1575          *  and will clear only when CSR_FH_INT_STATUS gets cleared. */
1576         inta = iwl_read32(priv, CSR_INT);
1577         iwl_write32(priv, CSR_INT, inta);
1578
1579         /* Ack/clear/reset pending flow-handler (DMA) interrupts.
1580          * Any new interrupts that happen after this, either while we're
1581          * in this tasklet, or later, will show up in next ISR/tasklet. */
1582         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1583         iwl_write32(priv, CSR_FH_INT_STATUS, inta_fh);
1584
1585 #ifdef CONFIG_IWLWIFI_DEBUG
1586         if (priv->debug_level & IWL_DL_ISR) {
1587                 /* just for debug */
1588                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1589                 IWL_DEBUG_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1590                               inta, inta_mask, inta_fh);
1591         }
1592 #endif
1593
1594         /* Since CSR_INT and CSR_FH_INT_STATUS reads and clears are not
1595          * atomic, make sure that inta covers all the interrupts that
1596          * we've discovered, even if FH interrupt came in just after
1597          * reading CSR_INT. */
1598         if (inta_fh & CSR49_FH_INT_RX_MASK)
1599                 inta |= CSR_INT_BIT_FH_RX;
1600         if (inta_fh & CSR49_FH_INT_TX_MASK)
1601                 inta |= CSR_INT_BIT_FH_TX;
1602
1603         /* Now service all interrupt bits discovered above. */
1604         if (inta & CSR_INT_BIT_HW_ERR) {
1605                 IWL_ERROR("Microcode HW error detected.  Restarting.\n");
1606
1607                 /* Tell the device to stop sending interrupts */
1608                 iwl_disable_interrupts(priv);
1609
1610                 iwl_irq_handle_error(priv);
1611
1612                 handled |= CSR_INT_BIT_HW_ERR;
1613
1614                 spin_unlock_irqrestore(&priv->lock, flags);
1615
1616                 return;
1617         }
1618
1619 #ifdef CONFIG_IWLWIFI_DEBUG
1620         if (priv->debug_level & (IWL_DL_ISR)) {
1621                 /* NIC fires this, but we don't use it, redundant with WAKEUP */
1622                 if (inta & CSR_INT_BIT_SCD)
1623                         IWL_DEBUG_ISR("Scheduler finished to transmit "
1624                                       "the frame/frames.\n");
1625
1626                 /* Alive notification via Rx interrupt will do the real work */
1627                 if (inta & CSR_INT_BIT_ALIVE)
1628                         IWL_DEBUG_ISR("Alive interrupt\n");
1629         }
1630 #endif
1631         /* Safely ignore these bits for debug checks below */
1632         inta &= ~(CSR_INT_BIT_SCD | CSR_INT_BIT_ALIVE);
1633
1634         /* HW RF KILL switch toggled */
1635         if (inta & CSR_INT_BIT_RF_KILL) {
1636                 int hw_rf_kill = 0;
1637                 if (!(iwl_read32(priv, CSR_GP_CNTRL) &
1638                                 CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
1639                         hw_rf_kill = 1;
1640
1641                 IWL_DEBUG(IWL_DL_RF_KILL, "RF_KILL bit toggled to %s.\n",
1642                                 hw_rf_kill ? "disable radio":"enable radio");
1643
1644                 /* driver only loads ucode once setting the interface up.
1645                  * the driver as well won't allow loading if RFKILL is set
1646                  * therefore no need to restart the driver from this handler
1647                  */
1648                 if (!hw_rf_kill && !test_bit(STATUS_ALIVE, &priv->status))
1649                         clear_bit(STATUS_RF_KILL_HW, &priv->status);
1650
1651                 handled |= CSR_INT_BIT_RF_KILL;
1652         }
1653
1654         /* Chip got too hot and stopped itself */
1655         if (inta & CSR_INT_BIT_CT_KILL) {
1656                 IWL_ERROR("Microcode CT kill error detected.\n");
1657                 handled |= CSR_INT_BIT_CT_KILL;
1658         }
1659
1660         /* Error detected by uCode */
1661         if (inta & CSR_INT_BIT_SW_ERR) {
1662                 IWL_ERROR("Microcode SW error detected.  Restarting 0x%X.\n",
1663                           inta);
1664                 iwl_irq_handle_error(priv);
1665                 handled |= CSR_INT_BIT_SW_ERR;
1666         }
1667
1668         /* uCode wakes up after power-down sleep */
1669         if (inta & CSR_INT_BIT_WAKEUP) {
1670                 IWL_DEBUG_ISR("Wakeup interrupt\n");
1671                 iwl_rx_queue_update_write_ptr(priv, &priv->rxq);
1672                 iwl_txq_update_write_ptr(priv, &priv->txq[0]);
1673                 iwl_txq_update_write_ptr(priv, &priv->txq[1]);
1674                 iwl_txq_update_write_ptr(priv, &priv->txq[2]);
1675                 iwl_txq_update_write_ptr(priv, &priv->txq[3]);
1676                 iwl_txq_update_write_ptr(priv, &priv->txq[4]);
1677                 iwl_txq_update_write_ptr(priv, &priv->txq[5]);
1678
1679                 handled |= CSR_INT_BIT_WAKEUP;
1680         }
1681
1682         /* All uCode command responses, including Tx command responses,
1683          * Rx "responses" (frame-received notification), and other
1684          * notifications from uCode come through here*/
1685         if (inta & (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX)) {
1686                 iwl_rx_handle(priv);
1687                 handled |= (CSR_INT_BIT_FH_RX | CSR_INT_BIT_SW_RX);
1688         }
1689
1690         if (inta & CSR_INT_BIT_FH_TX) {
1691                 IWL_DEBUG_ISR("Tx interrupt\n");
1692                 handled |= CSR_INT_BIT_FH_TX;
1693                 /* FH finished to write, send event */
1694                 priv->ucode_write_complete = 1;
1695                 wake_up_interruptible(&priv->wait_command_queue);
1696         }
1697
1698         if (inta & ~handled)
1699                 IWL_ERROR("Unhandled INTA bits 0x%08x\n", inta & ~handled);
1700
1701         if (inta & ~CSR_INI_SET_MASK) {
1702                 IWL_WARNING("Disabled INTA bits 0x%08x were pending\n",
1703                          inta & ~CSR_INI_SET_MASK);
1704                 IWL_WARNING("   with FH_INT = 0x%08x\n", inta_fh);
1705         }
1706
1707         /* Re-enable all interrupts */
1708         /* only Re-enable if diabled by irq */
1709         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1710                 iwl_enable_interrupts(priv);
1711
1712 #ifdef CONFIG_IWLWIFI_DEBUG
1713         if (priv->debug_level & (IWL_DL_ISR)) {
1714                 inta = iwl_read32(priv, CSR_INT);
1715                 inta_mask = iwl_read32(priv, CSR_INT_MASK);
1716                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1717                 IWL_DEBUG_ISR("End inta 0x%08x, enabled 0x%08x, fh 0x%08x, "
1718                         "flags 0x%08lx\n", inta, inta_mask, inta_fh, flags);
1719         }
1720 #endif
1721         spin_unlock_irqrestore(&priv->lock, flags);
1722 }
1723
1724 static irqreturn_t iwl_isr(int irq, void *data)
1725 {
1726         struct iwl_priv *priv = data;
1727         u32 inta, inta_mask;
1728         u32 inta_fh;
1729         if (!priv)
1730                 return IRQ_NONE;
1731
1732         spin_lock(&priv->lock);
1733
1734         /* Disable (but don't clear!) interrupts here to avoid
1735          *    back-to-back ISRs and sporadic interrupts from our NIC.
1736          * If we have something to service, the tasklet will re-enable ints.
1737          * If we *don't* have something, we'll re-enable before leaving here. */
1738         inta_mask = iwl_read32(priv, CSR_INT_MASK);  /* just for debug */
1739         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
1740
1741         /* Discover which interrupts are active/pending */
1742         inta = iwl_read32(priv, CSR_INT);
1743         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1744
1745         /* Ignore interrupt if there's nothing in NIC to service.
1746          * This may be due to IRQ shared with another device,
1747          * or due to sporadic interrupts thrown from our NIC. */
1748         if (!inta && !inta_fh) {
1749                 IWL_DEBUG_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n");
1750                 goto none;
1751         }
1752
1753         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
1754                 /* Hardware disappeared. It might have already raised
1755                  * an interrupt */
1756                 IWL_WARNING("HARDWARE GONE?? INTA == 0x%080x\n", inta);
1757                 goto unplugged;
1758         }
1759
1760         IWL_DEBUG_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1761                       inta, inta_mask, inta_fh);
1762
1763         inta &= ~CSR_INT_BIT_SCD;
1764
1765         /* iwl_irq_tasklet() will service interrupts and re-enable them */
1766         if (likely(inta || inta_fh))
1767                 tasklet_schedule(&priv->irq_tasklet);
1768
1769  unplugged:
1770         spin_unlock(&priv->lock);
1771         return IRQ_HANDLED;
1772
1773  none:
1774         /* re-enable interrupts here since we don't have anything to service. */
1775         /* only Re-enable if diabled by irq */
1776         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1777                 iwl_enable_interrupts(priv);
1778         spin_unlock(&priv->lock);
1779         return IRQ_NONE;
1780 }
1781
1782 /******************************************************************************
1783  *
1784  * uCode download functions
1785  *
1786  ******************************************************************************/
1787
1788 static void iwl_dealloc_ucode_pci(struct iwl_priv *priv)
1789 {
1790         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_code);
1791         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data);
1792         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1793         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init);
1794         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1795         iwl_free_fw_desc(priv->pci_dev, &priv->ucode_boot);
1796 }
1797
1798 static void iwl_nic_start(struct iwl_priv *priv)
1799 {
1800         /* Remove all resets to allow NIC to operate */
1801         iwl_write32(priv, CSR_RESET, 0);
1802 }
1803
1804
1805 /**
1806  * iwl_read_ucode - Read uCode images from disk file.
1807  *
1808  * Copy into buffers for card to fetch via bus-mastering
1809  */
1810 static int iwl_read_ucode(struct iwl_priv *priv)
1811 {
1812         struct iwl_ucode *ucode;
1813         int ret;
1814         const struct firmware *ucode_raw;
1815         const char *name = priv->cfg->fw_name;
1816         u8 *src;
1817         size_t len;
1818         u32 ver, inst_size, data_size, init_size, init_data_size, boot_size;
1819
1820         /* Ask kernel firmware_class module to get the boot firmware off disk.
1821          * request_firmware() is synchronous, file is in memory on return. */
1822         ret = request_firmware(&ucode_raw, name, &priv->pci_dev->dev);
1823         if (ret < 0) {
1824                 IWL_ERROR("%s firmware file req failed: Reason %d\n",
1825                                         name, ret);
1826                 goto error;
1827         }
1828
1829         IWL_DEBUG_INFO("Got firmware '%s' file (%zd bytes) from disk\n",
1830                        name, ucode_raw->size);
1831
1832         /* Make sure that we got at least our header! */
1833         if (ucode_raw->size < sizeof(*ucode)) {
1834                 IWL_ERROR("File size way too small!\n");
1835                 ret = -EINVAL;
1836                 goto err_release;
1837         }
1838
1839         /* Data from ucode file:  header followed by uCode images */
1840         ucode = (void *)ucode_raw->data;
1841
1842         ver = le32_to_cpu(ucode->ver);
1843         inst_size = le32_to_cpu(ucode->inst_size);
1844         data_size = le32_to_cpu(ucode->data_size);
1845         init_size = le32_to_cpu(ucode->init_size);
1846         init_data_size = le32_to_cpu(ucode->init_data_size);
1847         boot_size = le32_to_cpu(ucode->boot_size);
1848
1849         IWL_DEBUG_INFO("f/w package hdr ucode version = 0x%x\n", ver);
1850         IWL_DEBUG_INFO("f/w package hdr runtime inst size = %u\n",
1851                        inst_size);
1852         IWL_DEBUG_INFO("f/w package hdr runtime data size = %u\n",
1853                        data_size);
1854         IWL_DEBUG_INFO("f/w package hdr init inst size = %u\n",
1855                        init_size);
1856         IWL_DEBUG_INFO("f/w package hdr init data size = %u\n",
1857                        init_data_size);
1858         IWL_DEBUG_INFO("f/w package hdr boot inst size = %u\n",
1859                        boot_size);
1860
1861         /* Verify size of file vs. image size info in file's header */
1862         if (ucode_raw->size < sizeof(*ucode) +
1863                 inst_size + data_size + init_size +
1864                 init_data_size + boot_size) {
1865
1866                 IWL_DEBUG_INFO("uCode file size %d too small\n",
1867                                (int)ucode_raw->size);
1868                 ret = -EINVAL;
1869                 goto err_release;
1870         }
1871
1872         /* Verify that uCode images will fit in card's SRAM */
1873         if (inst_size > priv->hw_params.max_inst_size) {
1874                 IWL_DEBUG_INFO("uCode instr len %d too large to fit in\n",
1875                                inst_size);
1876                 ret = -EINVAL;
1877                 goto err_release;
1878         }
1879
1880         if (data_size > priv->hw_params.max_data_size) {
1881                 IWL_DEBUG_INFO("uCode data len %d too large to fit in\n",
1882                                 data_size);
1883                 ret = -EINVAL;
1884                 goto err_release;
1885         }
1886         if (init_size > priv->hw_params.max_inst_size) {
1887                 IWL_DEBUG_INFO
1888                     ("uCode init instr len %d too large to fit in\n",
1889                       init_size);
1890                 ret = -EINVAL;
1891                 goto err_release;
1892         }
1893         if (init_data_size > priv->hw_params.max_data_size) {
1894                 IWL_DEBUG_INFO
1895                     ("uCode init data len %d too large to fit in\n",
1896                       init_data_size);
1897                 ret = -EINVAL;
1898                 goto err_release;
1899         }
1900         if (boot_size > priv->hw_params.max_bsm_size) {
1901                 IWL_DEBUG_INFO
1902                     ("uCode boot instr len %d too large to fit in\n",
1903                       boot_size);
1904                 ret = -EINVAL;
1905                 goto err_release;
1906         }
1907
1908         /* Allocate ucode buffers for card's bus-master loading ... */
1909
1910         /* Runtime instructions and 2 copies of data:
1911          * 1) unmodified from disk
1912          * 2) backup cache for save/restore during power-downs */
1913         priv->ucode_code.len = inst_size;
1914         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_code);
1915
1916         priv->ucode_data.len = data_size;
1917         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data);
1918
1919         priv->ucode_data_backup.len = data_size;
1920         iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
1921
1922         /* Initialization instructions and data */
1923         if (init_size && init_data_size) {
1924                 priv->ucode_init.len = init_size;
1925                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init);
1926
1927                 priv->ucode_init_data.len = init_data_size;
1928                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_init_data);
1929
1930                 if (!priv->ucode_init.v_addr || !priv->ucode_init_data.v_addr)
1931                         goto err_pci_alloc;
1932         }
1933
1934         /* Bootstrap (instructions only, no data) */
1935         if (boot_size) {
1936                 priv->ucode_boot.len = boot_size;
1937                 iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_boot);
1938
1939                 if (!priv->ucode_boot.v_addr)
1940                         goto err_pci_alloc;
1941         }
1942
1943         /* Copy images into buffers for card's bus-master reads ... */
1944
1945         /* Runtime instructions (first block of data in file) */
1946         src = &ucode->data[0];
1947         len = priv->ucode_code.len;
1948         IWL_DEBUG_INFO("Copying (but not loading) uCode instr len %Zd\n", len);
1949         memcpy(priv->ucode_code.v_addr, src, len);
1950         IWL_DEBUG_INFO("uCode instr buf vaddr = 0x%p, paddr = 0x%08x\n",
1951                 priv->ucode_code.v_addr, (u32)priv->ucode_code.p_addr);
1952
1953         /* Runtime data (2nd block)
1954          * NOTE:  Copy into backup buffer will be done in iwl_up()  */
1955         src = &ucode->data[inst_size];
1956         len = priv->ucode_data.len;
1957         IWL_DEBUG_INFO("Copying (but not loading) uCode data len %Zd\n", len);
1958         memcpy(priv->ucode_data.v_addr, src, len);
1959         memcpy(priv->ucode_data_backup.v_addr, src, len);
1960
1961         /* Initialization instructions (3rd block) */
1962         if (init_size) {
1963                 src = &ucode->data[inst_size + data_size];
1964                 len = priv->ucode_init.len;
1965                 IWL_DEBUG_INFO("Copying (but not loading) init instr len %Zd\n",
1966                                 len);
1967                 memcpy(priv->ucode_init.v_addr, src, len);
1968         }
1969
1970         /* Initialization data (4th block) */
1971         if (init_data_size) {
1972                 src = &ucode->data[inst_size + data_size + init_size];
1973                 len = priv->ucode_init_data.len;
1974                 IWL_DEBUG_INFO("Copying (but not loading) init data len %Zd\n",
1975                                len);
1976                 memcpy(priv->ucode_init_data.v_addr, src, len);
1977         }
1978
1979         /* Bootstrap instructions (5th block) */
1980         src = &ucode->data[inst_size + data_size + init_size + init_data_size];
1981         len = priv->ucode_boot.len;
1982         IWL_DEBUG_INFO("Copying (but not loading) boot instr len %Zd\n", len);
1983         memcpy(priv->ucode_boot.v_addr, src, len);
1984
1985         /* We have our copies now, allow OS release its copies */
1986         release_firmware(ucode_raw);
1987         return 0;
1988
1989  err_pci_alloc:
1990         IWL_ERROR("failed to allocate pci memory\n");
1991         ret = -ENOMEM;
1992         iwl_dealloc_ucode_pci(priv);
1993
1994  err_release:
1995         release_firmware(ucode_raw);
1996
1997  error:
1998         return ret;
1999 }
2000
2001 /**
2002  * iwl_alive_start - called after REPLY_ALIVE notification received
2003  *                   from protocol/runtime uCode (initialization uCode's
2004  *                   Alive gets handled by iwl_init_alive_start()).
2005  */
2006 static void iwl_alive_start(struct iwl_priv *priv)
2007 {
2008         int ret = 0;
2009
2010         IWL_DEBUG_INFO("Runtime Alive received.\n");
2011
2012         if (priv->card_alive.is_valid != UCODE_VALID_OK) {
2013                 /* We had an error bringing up the hardware, so take it
2014                  * all the way back down so we can try again */
2015                 IWL_DEBUG_INFO("Alive failed.\n");
2016                 goto restart;
2017         }
2018
2019         /* Initialize uCode has loaded Runtime uCode ... verify inst image.
2020          * This is a paranoid check, because we would not have gotten the
2021          * "runtime" alive if code weren't properly loaded.  */
2022         if (iwl_verify_ucode(priv)) {
2023                 /* Runtime instruction load was bad;
2024                  * take it all the way back down so we can try again */
2025                 IWL_DEBUG_INFO("Bad runtime uCode load.\n");
2026                 goto restart;
2027         }
2028
2029         iwl_clear_stations_table(priv);
2030         ret = priv->cfg->ops->lib->alive_notify(priv);
2031         if (ret) {
2032                 IWL_WARNING("Could not complete ALIVE transition [ntf]: %d\n",
2033                             ret);
2034                 goto restart;
2035         }
2036
2037         /* After the ALIVE response, we can send host commands to the uCode */
2038         set_bit(STATUS_ALIVE, &priv->status);
2039
2040         if (iwl_is_rfkill(priv))
2041                 return;
2042
2043         ieee80211_wake_queues(priv->hw);
2044
2045         priv->active_rate = priv->rates_mask;
2046         priv->active_rate_basic = priv->rates_mask & IWL_BASIC_RATES_MASK;
2047
2048         if (iwl_is_associated(priv)) {
2049                 struct iwl_rxon_cmd *active_rxon =
2050                                 (struct iwl_rxon_cmd *)&priv->active_rxon;
2051
2052                 memcpy(&priv->staging_rxon, &priv->active_rxon,
2053                        sizeof(priv->staging_rxon));
2054                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2055         } else {
2056                 /* Initialize our rx_config data */
2057                 iwl_connection_init_rx_config(priv, priv->iw_mode);
2058                 memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2059         }
2060
2061         /* Configure Bluetooth device coexistence support */
2062         iwl_send_bt_config(priv);
2063
2064         iwl_reset_run_time_calib(priv);
2065
2066         /* Configure the adapter for unassociated operation */
2067         iwl_commit_rxon(priv);
2068
2069         /* At this point, the NIC is initialized and operational */
2070         iwl_rf_kill_ct_config(priv);
2071
2072         iwl_leds_register(priv);
2073
2074         IWL_DEBUG_INFO("ALIVE processing complete.\n");
2075         set_bit(STATUS_READY, &priv->status);
2076         wake_up_interruptible(&priv->wait_command_queue);
2077
2078         if (priv->error_recovering)
2079                 iwl_error_recovery(priv);
2080
2081         iwl_power_update_mode(priv, 1);
2082
2083         if (test_and_clear_bit(STATUS_MODE_PENDING, &priv->status))
2084                 iwl_set_mode(priv, priv->iw_mode);
2085
2086         return;
2087
2088  restart:
2089         queue_work(priv->workqueue, &priv->restart);
2090 }
2091
2092 static void iwl_cancel_deferred_work(struct iwl_priv *priv);
2093
2094 static void __iwl_down(struct iwl_priv *priv)
2095 {
2096         unsigned long flags;
2097         int exit_pending = test_bit(STATUS_EXIT_PENDING, &priv->status);
2098
2099         IWL_DEBUG_INFO(DRV_NAME " is going down\n");
2100
2101         if (!exit_pending)
2102                 set_bit(STATUS_EXIT_PENDING, &priv->status);
2103
2104         iwl_leds_unregister(priv);
2105
2106         iwl_clear_stations_table(priv);
2107
2108         /* Unblock any waiting calls */
2109         wake_up_interruptible_all(&priv->wait_command_queue);
2110
2111         /* Wipe out the EXIT_PENDING status bit if we are not actually
2112          * exiting the module */
2113         if (!exit_pending)
2114                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
2115
2116         /* stop and reset the on-board processor */
2117         iwl_write32(priv, CSR_RESET, CSR_RESET_REG_FLAG_NEVO_RESET);
2118
2119         /* tell the device to stop sending interrupts */
2120         spin_lock_irqsave(&priv->lock, flags);
2121         iwl_disable_interrupts(priv);
2122         spin_unlock_irqrestore(&priv->lock, flags);
2123         iwl_synchronize_irq(priv);
2124
2125         if (priv->mac80211_registered)
2126                 ieee80211_stop_queues(priv->hw);
2127
2128         /* If we have not previously called iwl_init() then
2129          * clear all bits but the RF Kill and SUSPEND bits and return */
2130         if (!iwl_is_init(priv)) {
2131                 priv->status = test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2132                                         STATUS_RF_KILL_HW |
2133                                test_bit(STATUS_RF_KILL_SW, &priv->status) <<
2134                                         STATUS_RF_KILL_SW |
2135                                test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2136                                         STATUS_GEO_CONFIGURED |
2137                                test_bit(STATUS_IN_SUSPEND, &priv->status) <<
2138                                         STATUS_IN_SUSPEND |
2139                                test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2140                                         STATUS_EXIT_PENDING;
2141                 goto exit;
2142         }
2143
2144         /* ...otherwise clear out all the status bits but the RF Kill and
2145          * SUSPEND bits and continue taking the NIC down. */
2146         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
2147                                 STATUS_RF_KILL_HW |
2148                         test_bit(STATUS_RF_KILL_SW, &priv->status) <<
2149                                 STATUS_RF_KILL_SW |
2150                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
2151                                 STATUS_GEO_CONFIGURED |
2152                         test_bit(STATUS_IN_SUSPEND, &priv->status) <<
2153                                 STATUS_IN_SUSPEND |
2154                         test_bit(STATUS_FW_ERROR, &priv->status) <<
2155                                 STATUS_FW_ERROR |
2156                        test_bit(STATUS_EXIT_PENDING, &priv->status) <<
2157                                 STATUS_EXIT_PENDING;
2158
2159         spin_lock_irqsave(&priv->lock, flags);
2160         iwl_clear_bit(priv, CSR_GP_CNTRL,
2161                          CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
2162         spin_unlock_irqrestore(&priv->lock, flags);
2163
2164         iwl_txq_ctx_stop(priv);
2165         iwl_rxq_stop(priv);
2166
2167         spin_lock_irqsave(&priv->lock, flags);
2168         if (!iwl_grab_nic_access(priv)) {
2169                 iwl_write_prph(priv, APMG_CLK_DIS_REG,
2170                                          APMG_CLK_VAL_DMA_CLK_RQT);
2171                 iwl_release_nic_access(priv);
2172         }
2173         spin_unlock_irqrestore(&priv->lock, flags);
2174
2175         udelay(5);
2176
2177         /* FIXME: apm_ops.suspend(priv) */
2178         if (exit_pending || test_bit(STATUS_IN_SUSPEND, &priv->status))
2179                 priv->cfg->ops->lib->apm_ops.stop(priv);
2180         else
2181                 priv->cfg->ops->lib->apm_ops.reset(priv);
2182         priv->cfg->ops->lib->free_shared_mem(priv);
2183
2184  exit:
2185         memset(&priv->card_alive, 0, sizeof(struct iwl_alive_resp));
2186
2187         if (priv->ibss_beacon)
2188                 dev_kfree_skb(priv->ibss_beacon);
2189         priv->ibss_beacon = NULL;
2190
2191         /* clear out any free frames */
2192         iwl_clear_free_frames(priv);
2193 }
2194
2195 static void iwl_down(struct iwl_priv *priv)
2196 {
2197         mutex_lock(&priv->mutex);
2198         __iwl_down(priv);
2199         mutex_unlock(&priv->mutex);
2200
2201         iwl_cancel_deferred_work(priv);
2202 }
2203
2204 #define MAX_HW_RESTARTS 5
2205
2206 static int __iwl_up(struct iwl_priv *priv)
2207 {
2208         int i;
2209         int ret;
2210
2211         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
2212                 IWL_WARNING("Exit pending; will not bring the NIC up\n");
2213                 return -EIO;
2214         }
2215
2216         if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
2217                 IWL_ERROR("ucode not available for device bringup\n");
2218                 return -EIO;
2219         }
2220
2221         /* If platform's RF_KILL switch is NOT set to KILL */
2222         if (iwl_read32(priv, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW)
2223                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2224         else
2225                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2226
2227         if (iwl_is_rfkill(priv)) {
2228                 iwl_enable_interrupts(priv);
2229                 IWL_WARNING("Radio disabled by %s RF Kill switch\n",
2230                     test_bit(STATUS_RF_KILL_HW, &priv->status) ? "HW" : "SW");
2231                 return 0;
2232         }
2233
2234         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2235
2236         ret = priv->cfg->ops->lib->alloc_shared_mem(priv);
2237         if (ret) {
2238                 IWL_ERROR("Unable to allocate shared memory\n");
2239                 return ret;
2240         }
2241
2242         ret = iwl_hw_nic_init(priv);
2243         if (ret) {
2244                 IWL_ERROR("Unable to init nic\n");
2245                 return ret;
2246         }
2247
2248         /* make sure rfkill handshake bits are cleared */
2249         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2250         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
2251                     CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
2252
2253         /* clear (again), then enable host interrupts */
2254         iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
2255         iwl_enable_interrupts(priv);
2256
2257         /* really make sure rfkill handshake bits are cleared */
2258         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2259         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2260
2261         /* Copy original ucode data image from disk into backup cache.
2262          * This will be used to initialize the on-board processor's
2263          * data SRAM for a clean start when the runtime program first loads. */
2264         memcpy(priv->ucode_data_backup.v_addr, priv->ucode_data.v_addr,
2265                priv->ucode_data.len);
2266
2267         for (i = 0; i < MAX_HW_RESTARTS; i++) {
2268
2269                 iwl_clear_stations_table(priv);
2270
2271                 /* load bootstrap state machine,
2272                  * load bootstrap program into processor's memory,
2273                  * prepare to load the "initialize" uCode */
2274                 ret = priv->cfg->ops->lib->load_ucode(priv);
2275
2276                 if (ret) {
2277                         IWL_ERROR("Unable to set up bootstrap uCode: %d\n", ret);
2278                         continue;
2279                 }
2280
2281                 /* Clear out the uCode error bit if it is set */
2282                 clear_bit(STATUS_FW_ERROR, &priv->status);
2283
2284                 /* start card; "initialize" will load runtime ucode */
2285                 iwl_nic_start(priv);
2286
2287                 IWL_DEBUG_INFO(DRV_NAME " is coming up\n");
2288
2289                 return 0;
2290         }
2291
2292         set_bit(STATUS_EXIT_PENDING, &priv->status);
2293         __iwl_down(priv);
2294         clear_bit(STATUS_EXIT_PENDING, &priv->status);
2295
2296         /* tried to restart and config the device for as long as our
2297          * patience could withstand */
2298         IWL_ERROR("Unable to initialize device after %d attempts.\n", i);
2299         return -EIO;
2300 }
2301
2302
2303 /*****************************************************************************
2304  *
2305  * Workqueue callbacks
2306  *
2307  *****************************************************************************/
2308
2309 static void iwl_bg_init_alive_start(struct work_struct *data)
2310 {
2311         struct iwl_priv *priv =
2312             container_of(data, struct iwl_priv, init_alive_start.work);
2313
2314         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2315                 return;
2316
2317         mutex_lock(&priv->mutex);
2318         priv->cfg->ops->lib->init_alive_start(priv);
2319         mutex_unlock(&priv->mutex);
2320 }
2321
2322 static void iwl_bg_alive_start(struct work_struct *data)
2323 {
2324         struct iwl_priv *priv =
2325             container_of(data, struct iwl_priv, alive_start.work);
2326
2327         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2328                 return;
2329
2330         mutex_lock(&priv->mutex);
2331         iwl_alive_start(priv);
2332         mutex_unlock(&priv->mutex);
2333         ieee80211_notify_mac(priv->hw, IEEE80211_NOTIFY_RE_ASSOC);
2334 }
2335
2336 static void iwl_bg_rf_kill(struct work_struct *work)
2337 {
2338         struct iwl_priv *priv = container_of(work, struct iwl_priv, rf_kill);
2339
2340         wake_up_interruptible(&priv->wait_command_queue);
2341
2342         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2343                 return;
2344
2345         mutex_lock(&priv->mutex);
2346
2347         if (!iwl_is_rfkill(priv)) {
2348                 IWL_DEBUG(IWL_DL_RF_KILL,
2349                           "HW and/or SW RF Kill no longer active, restarting "
2350                           "device\n");
2351                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status))
2352                         queue_work(priv->workqueue, &priv->restart);
2353         } else {
2354                 /* make sure mac80211 stop sending Tx frame */
2355                 if (priv->mac80211_registered)
2356                         ieee80211_stop_queues(priv->hw);
2357
2358                 if (!test_bit(STATUS_RF_KILL_HW, &priv->status))
2359                         IWL_DEBUG_RF_KILL("Can not turn radio back on - "
2360                                           "disabled by SW switch\n");
2361                 else
2362                         IWL_WARNING("Radio Frequency Kill Switch is On:\n"
2363                                     "Kill switch must be turned off for "
2364                                     "wireless networking to work.\n");
2365         }
2366         mutex_unlock(&priv->mutex);
2367         iwl_rfkill_set_hw_state(priv);
2368 }
2369
2370 static void iwl_bg_set_monitor(struct work_struct *work)
2371 {
2372         struct iwl_priv *priv = container_of(work,
2373                                 struct iwl_priv, set_monitor);
2374         int ret;
2375
2376         IWL_DEBUG(IWL_DL_STATE, "setting monitor mode\n");
2377
2378         mutex_lock(&priv->mutex);
2379
2380         ret = iwl_set_mode(priv, NL80211_IFTYPE_MONITOR);
2381         if (ret) {
2382                 if (ret == -EAGAIN)
2383                         IWL_DEBUG(IWL_DL_STATE, "leave - not ready\n");
2384                 else
2385                         IWL_ERROR("iwl_set_mode() failed ret = %d\n", ret);
2386         }
2387
2388         mutex_unlock(&priv->mutex);
2389         ieee80211_notify_mac(priv->hw, IEEE80211_NOTIFY_RE_ASSOC);
2390 }
2391
2392 static void iwl_bg_run_time_calib_work(struct work_struct *work)
2393 {
2394         struct iwl_priv *priv = container_of(work, struct iwl_priv,
2395                         run_time_calib_work);
2396
2397         mutex_lock(&priv->mutex);
2398
2399         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
2400             test_bit(STATUS_SCANNING, &priv->status)) {
2401                 mutex_unlock(&priv->mutex);
2402                 return;
2403         }
2404
2405         if (priv->start_calib) {
2406                 iwl_chain_noise_calibration(priv, &priv->statistics);
2407
2408                 iwl_sensitivity_calibration(priv, &priv->statistics);
2409         }
2410
2411         mutex_unlock(&priv->mutex);
2412         return;
2413 }
2414
2415 static void iwl_bg_up(struct work_struct *data)
2416 {
2417         struct iwl_priv *priv = container_of(data, struct iwl_priv, up);
2418
2419         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2420                 return;
2421
2422         mutex_lock(&priv->mutex);
2423         __iwl_up(priv);
2424         mutex_unlock(&priv->mutex);
2425         iwl_rfkill_set_hw_state(priv);
2426 }
2427
2428 static void iwl_bg_restart(struct work_struct *data)
2429 {
2430         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
2431
2432         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2433                 return;
2434
2435         iwl_down(priv);
2436         queue_work(priv->workqueue, &priv->up);
2437 }
2438
2439 static void iwl_bg_rx_replenish(struct work_struct *data)
2440 {
2441         struct iwl_priv *priv =
2442             container_of(data, struct iwl_priv, rx_replenish);
2443
2444         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2445                 return;
2446
2447         mutex_lock(&priv->mutex);
2448         iwl_rx_replenish(priv);
2449         mutex_unlock(&priv->mutex);
2450 }
2451
2452 #define IWL_DELAY_NEXT_SCAN (HZ*2)
2453
2454 static void iwl_post_associate(struct iwl_priv *priv)
2455 {
2456         struct ieee80211_conf *conf = NULL;
2457         int ret = 0;
2458         unsigned long flags;
2459
2460         if (priv->iw_mode == NL80211_IFTYPE_AP) {
2461                 IWL_ERROR("%s Should not be called in AP mode\n", __func__);
2462                 return;
2463         }
2464
2465         IWL_DEBUG_ASSOC("Associated as %d to: %pM\n",
2466                         priv->assoc_id, priv->active_rxon.bssid_addr);
2467
2468
2469         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2470                 return;
2471
2472
2473         if (!priv->vif || !priv->is_open)
2474                 return;
2475
2476         iwl_power_cancel_timeout(priv);
2477         iwl_scan_cancel_timeout(priv, 200);
2478
2479         conf = ieee80211_get_hw_conf(priv->hw);
2480
2481         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2482         iwl_commit_rxon(priv);
2483
2484         iwl_setup_rxon_timing(priv);
2485         ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
2486                               sizeof(priv->rxon_timing), &priv->rxon_timing);
2487         if (ret)
2488                 IWL_WARNING("REPLY_RXON_TIMING failed - "
2489                             "Attempting to continue.\n");
2490
2491         priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2492
2493         iwl_set_rxon_ht(priv, &priv->current_ht_config);
2494
2495         iwl_set_rxon_chain(priv);
2496         priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
2497
2498         IWL_DEBUG_ASSOC("assoc id %d beacon interval %d\n",
2499                         priv->assoc_id, priv->beacon_int);
2500
2501         if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
2502                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2503         else
2504                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2505
2506         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
2507                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
2508                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
2509                 else
2510                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2511
2512                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
2513                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
2514
2515         }
2516
2517         iwl_commit_rxon(priv);
2518
2519         switch (priv->iw_mode) {
2520         case NL80211_IFTYPE_STATION:
2521                 break;
2522
2523         case NL80211_IFTYPE_ADHOC:
2524
2525                 /* assume default assoc id */
2526                 priv->assoc_id = 1;
2527
2528                 iwl_rxon_add_station(priv, priv->bssid, 0);
2529                 iwl_send_beacon_cmd(priv);
2530
2531                 break;
2532
2533         default:
2534                 IWL_ERROR("%s Should not be called in %d mode\n",
2535                           __func__, priv->iw_mode);
2536                 break;
2537         }
2538
2539         if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
2540                 priv->assoc_station_added = 1;
2541
2542         spin_lock_irqsave(&priv->lock, flags);
2543         iwl_activate_qos(priv, 0);
2544         spin_unlock_irqrestore(&priv->lock, flags);
2545
2546         /* the chain noise calibration will enabled PM upon completion
2547          * If chain noise has already been run, then we need to enable
2548          * power management here */
2549         if (priv->chain_noise_data.state == IWL_CHAIN_NOISE_DONE)
2550                 iwl_power_enable_management(priv);
2551
2552         /* Enable Rx differential gain and sensitivity calibrations */
2553         iwl_chain_noise_reset(priv);
2554         priv->start_calib = 1;
2555
2556 }
2557
2558 /*****************************************************************************
2559  *
2560  * mac80211 entry point functions
2561  *
2562  *****************************************************************************/
2563
2564 #define UCODE_READY_TIMEOUT     (4 * HZ)
2565
2566 static int iwl_mac_start(struct ieee80211_hw *hw)
2567 {
2568         struct iwl_priv *priv = hw->priv;
2569         int ret;
2570         u16 pci_cmd;
2571
2572         IWL_DEBUG_MAC80211("enter\n");
2573
2574         if (pci_enable_device(priv->pci_dev)) {
2575                 IWL_ERROR("Fail to pci_enable_device\n");
2576                 return -ENODEV;
2577         }
2578         pci_restore_state(priv->pci_dev);
2579         pci_enable_msi(priv->pci_dev);
2580
2581         /* enable interrupts if needed: hw bug w/a */
2582         pci_read_config_word(priv->pci_dev, PCI_COMMAND, &pci_cmd);
2583         if (pci_cmd & PCI_COMMAND_INTX_DISABLE) {
2584                 pci_cmd &= ~PCI_COMMAND_INTX_DISABLE;
2585                 pci_write_config_word(priv->pci_dev, PCI_COMMAND, pci_cmd);
2586         }
2587
2588         ret = request_irq(priv->pci_dev->irq, iwl_isr, IRQF_SHARED,
2589                           DRV_NAME, priv);
2590         if (ret) {
2591                 IWL_ERROR("Error allocating IRQ %d\n", priv->pci_dev->irq);
2592                 goto out_disable_msi;
2593         }
2594
2595         /* we should be verifying the device is ready to be opened */
2596         mutex_lock(&priv->mutex);
2597
2598         memset(&priv->staging_rxon, 0, sizeof(struct iwl_rxon_cmd));
2599         /* fetch ucode file from disk, alloc and copy to bus-master buffers ...
2600          * ucode filename and max sizes are card-specific. */
2601
2602         if (!priv->ucode_code.len) {
2603                 ret = iwl_read_ucode(priv);
2604                 if (ret) {
2605                         IWL_ERROR("Could not read microcode: %d\n", ret);
2606                         mutex_unlock(&priv->mutex);
2607                         goto out_release_irq;
2608                 }
2609         }
2610
2611         ret = __iwl_up(priv);
2612
2613         mutex_unlock(&priv->mutex);
2614
2615         iwl_rfkill_set_hw_state(priv);
2616
2617         if (ret)
2618                 goto out_release_irq;
2619
2620         if (iwl_is_rfkill(priv))
2621                 goto out;
2622
2623         IWL_DEBUG_INFO("Start UP work done.\n");
2624
2625         if (test_bit(STATUS_IN_SUSPEND, &priv->status))
2626                 return 0;
2627
2628         /* Wait for START_ALIVE from Run Time ucode. Otherwise callbacks from
2629          * mac80211 will not be run successfully. */
2630         ret = wait_event_interruptible_timeout(priv->wait_command_queue,
2631                         test_bit(STATUS_READY, &priv->status),
2632                         UCODE_READY_TIMEOUT);
2633         if (!ret) {
2634                 if (!test_bit(STATUS_READY, &priv->status)) {
2635                         IWL_ERROR("START_ALIVE timeout after %dms.\n",
2636                                 jiffies_to_msecs(UCODE_READY_TIMEOUT));
2637                         ret = -ETIMEDOUT;
2638                         goto out_release_irq;
2639                 }
2640         }
2641
2642 out:
2643         priv->is_open = 1;
2644         IWL_DEBUG_MAC80211("leave\n");
2645         return 0;
2646
2647 out_release_irq:
2648         free_irq(priv->pci_dev->irq, priv);
2649 out_disable_msi:
2650         pci_disable_msi(priv->pci_dev);
2651         pci_disable_device(priv->pci_dev);
2652         priv->is_open = 0;
2653         IWL_DEBUG_MAC80211("leave - failed\n");
2654         return ret;
2655 }
2656
2657 static void iwl_mac_stop(struct ieee80211_hw *hw)
2658 {
2659         struct iwl_priv *priv = hw->priv;
2660
2661         IWL_DEBUG_MAC80211("enter\n");
2662
2663         if (!priv->is_open) {
2664                 IWL_DEBUG_MAC80211("leave - skip\n");
2665                 return;
2666         }
2667
2668         priv->is_open = 0;
2669
2670         if (iwl_is_ready_rf(priv)) {
2671                 /* stop mac, cancel any scan request and clear
2672                  * RXON_FILTER_ASSOC_MSK BIT
2673                  */
2674                 mutex_lock(&priv->mutex);
2675                 iwl_scan_cancel_timeout(priv, 100);
2676                 mutex_unlock(&priv->mutex);
2677         }
2678
2679         iwl_down(priv);
2680
2681         flush_workqueue(priv->workqueue);
2682         free_irq(priv->pci_dev->irq, priv);
2683         pci_disable_msi(priv->pci_dev);
2684         pci_save_state(priv->pci_dev);
2685         pci_disable_device(priv->pci_dev);
2686
2687         IWL_DEBUG_MAC80211("leave\n");
2688 }
2689
2690 static int iwl_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
2691 {
2692         struct iwl_priv *priv = hw->priv;
2693
2694         IWL_DEBUG_MACDUMP("enter\n");
2695
2696         IWL_DEBUG_TX("dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
2697                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
2698
2699         if (iwl_tx_skb(priv, skb))
2700                 dev_kfree_skb_any(skb);
2701
2702         IWL_DEBUG_MACDUMP("leave\n");
2703         return 0;
2704 }
2705
2706 static int iwl_mac_add_interface(struct ieee80211_hw *hw,
2707                                  struct ieee80211_if_init_conf *conf)
2708 {
2709         struct iwl_priv *priv = hw->priv;
2710         unsigned long flags;
2711
2712         IWL_DEBUG_MAC80211("enter: type %d\n", conf->type);
2713
2714         if (priv->vif) {
2715                 IWL_DEBUG_MAC80211("leave - vif != NULL\n");
2716                 return -EOPNOTSUPP;
2717         }
2718
2719         spin_lock_irqsave(&priv->lock, flags);
2720         priv->vif = conf->vif;
2721         priv->iw_mode = conf->type;
2722
2723         spin_unlock_irqrestore(&priv->lock, flags);
2724
2725         mutex_lock(&priv->mutex);
2726
2727         if (conf->mac_addr) {
2728                 IWL_DEBUG_MAC80211("Set %pM\n", conf->mac_addr);
2729                 memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
2730         }
2731
2732         if (iwl_set_mode(priv, conf->type) == -EAGAIN)
2733                 /* we are not ready, will run again when ready */
2734                 set_bit(STATUS_MODE_PENDING, &priv->status);
2735
2736         mutex_unlock(&priv->mutex);
2737
2738         IWL_DEBUG_MAC80211("leave\n");
2739         return 0;
2740 }
2741
2742 /**
2743  * iwl_mac_config - mac80211 config callback
2744  *
2745  * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
2746  * be set inappropriately and the driver currently sets the hardware up to
2747  * use it whenever needed.
2748  */
2749 static int iwl_mac_config(struct ieee80211_hw *hw, u32 changed)
2750 {
2751         struct iwl_priv *priv = hw->priv;
2752         const struct iwl_channel_info *ch_info;
2753         struct ieee80211_conf *conf = &hw->conf;
2754         unsigned long flags;
2755         int ret = 0;
2756         u16 channel;
2757
2758         mutex_lock(&priv->mutex);
2759         IWL_DEBUG_MAC80211("enter to channel %d\n", conf->channel->hw_value);
2760
2761         priv->current_ht_config.is_ht = conf->ht.enabled;
2762
2763         if (conf->radio_enabled && iwl_radio_kill_sw_enable_radio(priv)) {
2764                 IWL_DEBUG_MAC80211("leave - RF-KILL - waiting for uCode\n");
2765                 goto out;
2766         }
2767
2768         if (!conf->radio_enabled)
2769                 iwl_radio_kill_sw_disable_radio(priv);
2770
2771         if (!iwl_is_ready(priv)) {
2772                 IWL_DEBUG_MAC80211("leave - not ready\n");
2773                 ret = -EIO;
2774                 goto out;
2775         }
2776
2777         if (unlikely(!priv->cfg->mod_params->disable_hw_scan &&
2778                      test_bit(STATUS_SCANNING, &priv->status))) {
2779                 IWL_DEBUG_MAC80211("leave - scanning\n");
2780                 mutex_unlock(&priv->mutex);
2781                 return 0;
2782         }
2783
2784         channel = ieee80211_frequency_to_channel(conf->channel->center_freq);
2785         ch_info = iwl_get_channel_info(priv, conf->channel->band, channel);
2786         if (!is_channel_valid(ch_info)) {
2787                 IWL_DEBUG_MAC80211("leave - invalid channel\n");
2788                 ret = -EINVAL;
2789                 goto out;
2790         }
2791
2792         if (priv->iw_mode == NL80211_IFTYPE_ADHOC &&
2793             !is_channel_ibss(ch_info)) {
2794                 IWL_ERROR("channel %d in band %d not IBSS channel\n",
2795                         conf->channel->hw_value, conf->channel->band);
2796                 ret = -EINVAL;
2797                 goto out;
2798         }
2799
2800         spin_lock_irqsave(&priv->lock, flags);
2801
2802
2803         /* if we are switching from ht to 2.4 clear flags
2804          * from any ht related info since 2.4 does not
2805          * support ht */
2806         if ((le16_to_cpu(priv->staging_rxon.channel) != channel)
2807 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
2808             && !(conf->flags & IEEE80211_CONF_CHANNEL_SWITCH)
2809 #endif
2810         )
2811                 priv->staging_rxon.flags = 0;
2812
2813         iwl_set_rxon_channel(priv, conf->channel);
2814
2815         iwl_set_flags_for_band(priv, conf->channel->band);
2816
2817         /* The list of supported rates and rate mask can be different
2818          * for each band; since the band may have changed, reset
2819          * the rate mask to what mac80211 lists */
2820         iwl_set_rate(priv);
2821
2822         spin_unlock_irqrestore(&priv->lock, flags);
2823
2824 #ifdef IEEE80211_CONF_CHANNEL_SWITCH
2825         if (conf->flags & IEEE80211_CONF_CHANNEL_SWITCH) {
2826                 iwl_hw_channel_switch(priv, conf->channel);
2827                 goto out;
2828         }
2829 #endif
2830
2831         if (!conf->radio_enabled) {
2832                 IWL_DEBUG_MAC80211("leave - radio disabled\n");
2833                 goto out;
2834         }
2835
2836         if (iwl_is_rfkill(priv)) {
2837                 IWL_DEBUG_MAC80211("leave - RF kill\n");
2838                 ret = -EIO;
2839                 goto out;
2840         }
2841
2842         if (conf->flags & IEEE80211_CONF_PS)
2843                 ret = iwl_power_set_user_mode(priv, IWL_POWER_INDEX_3);
2844         else
2845                 ret = iwl_power_set_user_mode(priv, IWL_POWER_MODE_CAM);
2846         if (ret)
2847                 IWL_DEBUG_MAC80211("Error setting power level\n");
2848
2849         IWL_DEBUG_MAC80211("TX Power old=%d new=%d\n",
2850                            priv->tx_power_user_lmt, conf->power_level);
2851
2852         iwl_set_tx_power(priv, conf->power_level, false);
2853
2854         iwl_set_rate(priv);
2855
2856         if (memcmp(&priv->active_rxon,
2857                    &priv->staging_rxon, sizeof(priv->staging_rxon)))
2858                 iwl_commit_rxon(priv);
2859         else
2860                 IWL_DEBUG_INFO("No re-sending same RXON configuration.\n");
2861
2862         IWL_DEBUG_MAC80211("leave\n");
2863
2864 out:
2865         mutex_unlock(&priv->mutex);
2866         return ret;
2867 }
2868
2869 static void iwl_config_ap(struct iwl_priv *priv)
2870 {
2871         int ret = 0;
2872         unsigned long flags;
2873
2874         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2875                 return;
2876
2877         /* The following should be done only at AP bring up */
2878         if (!iwl_is_associated(priv)) {
2879
2880                 /* RXON - unassoc (to set timing command) */
2881                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2882                 iwl_commit_rxon(priv);
2883
2884                 /* RXON Timing */
2885                 iwl_setup_rxon_timing(priv);
2886                 ret = iwl_send_cmd_pdu(priv, REPLY_RXON_TIMING,
2887                                 sizeof(priv->rxon_timing), &priv->rxon_timing);
2888                 if (ret)
2889                         IWL_WARNING("REPLY_RXON_TIMING failed - "
2890                                         "Attempting to continue.\n");
2891
2892                 iwl_set_rxon_chain(priv);
2893
2894                 /* FIXME: what should be the assoc_id for AP? */
2895                 priv->staging_rxon.assoc_id = cpu_to_le16(priv->assoc_id);
2896                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
2897                         priv->staging_rxon.flags |=
2898                                 RXON_FLG_SHORT_PREAMBLE_MSK;
2899                 else
2900                         priv->staging_rxon.flags &=
2901                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
2902
2903                 if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) {
2904                         if (priv->assoc_capability &
2905                                 WLAN_CAPABILITY_SHORT_SLOT_TIME)
2906                                 priv->staging_rxon.flags |=
2907                                         RXON_FLG_SHORT_SLOT_MSK;
2908                         else
2909                                 priv->staging_rxon.flags &=
2910                                         ~RXON_FLG_SHORT_SLOT_MSK;
2911
2912                         if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
2913                                 priv->staging_rxon.flags &=
2914                                         ~RXON_FLG_SHORT_SLOT_MSK;
2915                 }
2916                 /* restore RXON assoc */
2917                 priv->staging_rxon.filter_flags |= RXON_FILTER_ASSOC_MSK;
2918                 iwl_commit_rxon(priv);
2919                 spin_lock_irqsave(&priv->lock, flags);
2920                 iwl_activate_qos(priv, 1);
2921                 spin_unlock_irqrestore(&priv->lock, flags);
2922                 iwl_rxon_add_station(priv, iwl_bcast_addr, 0);
2923         }
2924         iwl_send_beacon_cmd(priv);
2925
2926         /* FIXME - we need to add code here to detect a totally new
2927          * configuration, reset the AP, unassoc, rxon timing, assoc,
2928          * clear sta table, add BCAST sta... */
2929 }
2930
2931 /* temporary */
2932 static int iwl_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb);
2933
2934 static int iwl_mac_config_interface(struct ieee80211_hw *hw,
2935                                         struct ieee80211_vif *vif,
2936                                     struct ieee80211_if_conf *conf)
2937 {
2938         struct iwl_priv *priv = hw->priv;
2939         int rc;
2940
2941         if (conf == NULL)
2942                 return -EIO;
2943
2944         if (priv->vif != vif) {
2945                 IWL_DEBUG_MAC80211("leave - priv->vif != vif\n");
2946                 return 0;
2947         }
2948
2949         if (priv->iw_mode == NL80211_IFTYPE_ADHOC &&
2950             conf->changed & IEEE80211_IFCC_BEACON) {
2951                 struct sk_buff *beacon = ieee80211_beacon_get(hw, vif);
2952                 if (!beacon)
2953                         return -ENOMEM;
2954                 rc = iwl_mac_beacon_update(hw, beacon);
2955                 if (rc)
2956                         return rc;
2957         }
2958
2959         if (!iwl_is_alive(priv))
2960                 return -EAGAIN;
2961
2962         mutex_lock(&priv->mutex);
2963
2964         if (conf->bssid)
2965                 IWL_DEBUG_MAC80211("bssid: %pM\n", conf->bssid);
2966
2967 /*
2968  * very dubious code was here; the probe filtering flag is never set:
2969  *
2970         if (unlikely(test_bit(STATUS_SCANNING, &priv->status)) &&
2971             !(priv->hw->flags & IEEE80211_HW_NO_PROBE_FILTERING)) {
2972  */
2973
2974         if (priv->iw_mode == NL80211_IFTYPE_AP) {
2975                 if (!conf->bssid) {
2976                         conf->bssid = priv->mac_addr;
2977                         memcpy(priv->bssid, priv->mac_addr, ETH_ALEN);
2978                         IWL_DEBUG_MAC80211("bssid was set to: %pM\n",
2979                                            conf->bssid);
2980                 }
2981                 if (priv->ibss_beacon)
2982                         dev_kfree_skb(priv->ibss_beacon);
2983
2984                 priv->ibss_beacon = ieee80211_beacon_get(hw, vif);
2985         }
2986
2987         if (iwl_is_rfkill(priv))
2988                 goto done;
2989
2990         if (conf->bssid && !is_zero_ether_addr(conf->bssid) &&
2991             !is_multicast_ether_addr(conf->bssid)) {
2992                 /* If there is currently a HW scan going on in the background
2993                  * then we need to cancel it else the RXON below will fail. */
2994                 if (iwl_scan_cancel_timeout(priv, 100)) {
2995                         IWL_WARNING("Aborted scan still in progress "
2996                                     "after 100ms\n");
2997                         IWL_DEBUG_MAC80211("leaving - scan abort failed.\n");
2998                         mutex_unlock(&priv->mutex);
2999                         return -EAGAIN;
3000                 }
3001                 memcpy(priv->staging_rxon.bssid_addr, conf->bssid, ETH_ALEN);
3002
3003                 /* TODO: Audit driver for usage of these members and see
3004                  * if mac80211 deprecates them (priv->bssid looks like it
3005                  * shouldn't be there, but I haven't scanned the IBSS code
3006                  * to verify) - jpk */
3007                 memcpy(priv->bssid, conf->bssid, ETH_ALEN);
3008
3009                 if (priv->iw_mode == NL80211_IFTYPE_AP)
3010                         iwl_config_ap(priv);
3011                 else {
3012                         rc = iwl_commit_rxon(priv);
3013                         if ((priv->iw_mode == NL80211_IFTYPE_STATION) && rc)
3014                                 iwl_rxon_add_station(
3015                                         priv, priv->active_rxon.bssid_addr, 1);
3016                 }
3017
3018         } else {
3019                 iwl_scan_cancel_timeout(priv, 100);
3020                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3021                 iwl_commit_rxon(priv);
3022         }
3023
3024  done:
3025         IWL_DEBUG_MAC80211("leave\n");
3026         mutex_unlock(&priv->mutex);
3027
3028         return 0;
3029 }
3030
3031 static void iwl_configure_filter(struct ieee80211_hw *hw,
3032                                  unsigned int changed_flags,
3033                                  unsigned int *total_flags,
3034                                  int mc_count, struct dev_addr_list *mc_list)
3035 {
3036         struct iwl_priv *priv = hw->priv;
3037
3038         if (changed_flags & (*total_flags) & FIF_OTHER_BSS) {
3039                 IWL_DEBUG_MAC80211("Enter: type %d (0x%x, 0x%x)\n",
3040                                    NL80211_IFTYPE_MONITOR,
3041                                    changed_flags, *total_flags);
3042                 /* queue work 'cuz mac80211 is holding a lock which
3043                  * prevents us from issuing (synchronous) f/w cmds */
3044                 queue_work(priv->workqueue, &priv->set_monitor);
3045         }
3046         *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI |
3047                         FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
3048 }
3049
3050 static void iwl_mac_remove_interface(struct ieee80211_hw *hw,
3051                                      struct ieee80211_if_init_conf *conf)
3052 {
3053         struct iwl_priv *priv = hw->priv;
3054
3055         IWL_DEBUG_MAC80211("enter\n");
3056
3057         mutex_lock(&priv->mutex);
3058
3059         if (iwl_is_ready_rf(priv)) {
3060                 iwl_scan_cancel_timeout(priv, 100);
3061                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3062                 iwl_commit_rxon(priv);
3063         }
3064         if (priv->vif == conf->vif) {
3065                 priv->vif = NULL;
3066                 memset(priv->bssid, 0, ETH_ALEN);
3067         }
3068         mutex_unlock(&priv->mutex);
3069
3070         IWL_DEBUG_MAC80211("leave\n");
3071
3072 }
3073
3074 #define IWL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6)
3075 static void iwl_bss_info_changed(struct ieee80211_hw *hw,
3076                                      struct ieee80211_vif *vif,
3077                                      struct ieee80211_bss_conf *bss_conf,
3078                                      u32 changes)
3079 {
3080         struct iwl_priv *priv = hw->priv;
3081
3082         IWL_DEBUG_MAC80211("changes = 0x%X\n", changes);
3083
3084         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
3085                 IWL_DEBUG_MAC80211("ERP_PREAMBLE %d\n",
3086                                    bss_conf->use_short_preamble);
3087                 if (bss_conf->use_short_preamble)
3088                         priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
3089                 else
3090                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
3091         }
3092
3093         if (changes & BSS_CHANGED_ERP_CTS_PROT) {
3094                 IWL_DEBUG_MAC80211("ERP_CTS %d\n", bss_conf->use_cts_prot);
3095                 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
3096                         priv->staging_rxon.flags |= RXON_FLG_TGG_PROTECT_MSK;
3097                 else
3098                         priv->staging_rxon.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
3099         }
3100
3101         if (changes & BSS_CHANGED_HT) {
3102                 iwl_ht_conf(priv, bss_conf);
3103                 iwl_set_rxon_chain(priv);
3104         }
3105
3106         if (changes & BSS_CHANGED_ASSOC) {
3107                 IWL_DEBUG_MAC80211("ASSOC %d\n", bss_conf->assoc);
3108                 /* This should never happen as this function should
3109                  * never be called from interrupt context. */
3110                 if (WARN_ON_ONCE(in_interrupt()))
3111                         return;
3112                 if (bss_conf->assoc) {
3113                         priv->assoc_id = bss_conf->aid;
3114                         priv->beacon_int = bss_conf->beacon_int;
3115                         priv->power_data.dtim_period = bss_conf->dtim_period;
3116                         priv->timestamp = bss_conf->timestamp;
3117                         priv->assoc_capability = bss_conf->assoc_capability;
3118
3119                         /* we have just associated, don't start scan too early
3120                          * leave time for EAPOL exchange to complete
3121                          */
3122                         priv->next_scan_jiffies = jiffies +
3123                                         IWL_DELAY_NEXT_SCAN_AFTER_ASSOC;
3124                         mutex_lock(&priv->mutex);
3125                         iwl_post_associate(priv);
3126                         mutex_unlock(&priv->mutex);
3127                 } else {
3128                         priv->assoc_id = 0;
3129                         IWL_DEBUG_MAC80211("DISASSOC %d\n", bss_conf->assoc);
3130                 }
3131         } else if (changes && iwl_is_associated(priv) && priv->assoc_id) {
3132                         IWL_DEBUG_MAC80211("Associated Changes %d\n", changes);
3133                         iwl_send_rxon_assoc(priv);
3134         }
3135
3136 }
3137
3138 static int iwl_mac_hw_scan(struct ieee80211_hw *hw, u8 *ssid, size_t ssid_len)
3139 {
3140         unsigned long flags;
3141         struct iwl_priv *priv = hw->priv;
3142         int ret;
3143
3144         IWL_DEBUG_MAC80211("enter\n");
3145
3146         mutex_lock(&priv->mutex);
3147         spin_lock_irqsave(&priv->lock, flags);
3148
3149         if (!iwl_is_ready_rf(priv)) {
3150                 ret = -EIO;
3151                 IWL_DEBUG_MAC80211("leave - not ready or exit pending\n");
3152                 goto out_unlock;
3153         }
3154
3155         if (priv->iw_mode == NL80211_IFTYPE_AP) {       /* APs don't scan */
3156                 ret = -EIO;
3157                 IWL_ERROR("ERROR: APs don't scan\n");
3158                 goto out_unlock;
3159         }
3160
3161         /* We don't schedule scan within next_scan_jiffies period.
3162          * Avoid scanning during possible EAPOL exchange, return
3163          * success immediately.
3164          */
3165         if (priv->next_scan_jiffies &&
3166             time_after(priv->next_scan_jiffies, jiffies)) {
3167                 IWL_DEBUG_SCAN("scan rejected: within next scan period\n");
3168                 queue_work(priv->workqueue, &priv->scan_completed);
3169                 ret = 0;
3170                 goto out_unlock;
3171         }
3172
3173         /* if we just finished scan ask for delay */
3174         if (iwl_is_associated(priv) && priv->last_scan_jiffies &&
3175             time_after(priv->last_scan_jiffies + IWL_DELAY_NEXT_SCAN, jiffies)) {
3176                 IWL_DEBUG_SCAN("scan rejected: within previous scan period\n");
3177                 queue_work(priv->workqueue, &priv->scan_completed);
3178                 ret = 0;
3179                 goto out_unlock;
3180         }
3181
3182         if (ssid_len) {
3183                 priv->one_direct_scan = 1;
3184                 priv->direct_ssid_len =  min_t(u8, ssid_len, IW_ESSID_MAX_SIZE);
3185                 memcpy(priv->direct_ssid, ssid, priv->direct_ssid_len);
3186         } else {
3187                 priv->one_direct_scan = 0;
3188         }
3189
3190         ret = iwl_scan_initiate(priv);
3191
3192         IWL_DEBUG_MAC80211("leave\n");
3193
3194 out_unlock:
3195         spin_unlock_irqrestore(&priv->lock, flags);
3196         mutex_unlock(&priv->mutex);
3197
3198         return ret;
3199 }
3200
3201 static void iwl_mac_update_tkip_key(struct ieee80211_hw *hw,
3202                         struct ieee80211_key_conf *keyconf, const u8 *addr,
3203                         u32 iv32, u16 *phase1key)
3204 {
3205         struct iwl_priv *priv = hw->priv;
3206         u8 sta_id = IWL_INVALID_STATION;
3207         unsigned long flags;
3208         __le16 key_flags = 0;
3209         int i;
3210
3211         IWL_DEBUG_MAC80211("enter\n");
3212
3213         sta_id = iwl_find_station(priv, addr);
3214         if (sta_id == IWL_INVALID_STATION) {
3215                 IWL_DEBUG_MAC80211("leave - %pM not in station map.\n",
3216                                    addr);
3217                 return;
3218         }
3219
3220         if (iwl_scan_cancel(priv)) {
3221                 /* cancel scan failed, just live w/ bad key and rely
3222                    briefly on SW decryption */
3223                 return;
3224         }
3225
3226         key_flags |= (STA_KEY_FLG_TKIP | STA_KEY_FLG_MAP_KEY_MSK);
3227         key_flags |= cpu_to_le16(keyconf->keyidx << STA_KEY_FLG_KEYID_POS);
3228         key_flags &= ~STA_KEY_FLG_INVALID;
3229
3230         if (sta_id == priv->hw_params.bcast_sta_id)
3231                 key_flags |= STA_KEY_MULTICAST_MSK;
3232
3233         spin_lock_irqsave(&priv->sta_lock, flags);
3234
3235         priv->stations[sta_id].sta.key.key_flags = key_flags;
3236         priv->stations[sta_id].sta.key.tkip_rx_tsc_byte2 = (u8) iv32;
3237
3238         for (i = 0; i < 5; i++)
3239                 priv->stations[sta_id].sta.key.tkip_rx_ttak[i] =
3240                         cpu_to_le16(phase1key[i]);
3241
3242         priv->stations[sta_id].sta.sta.modify_mask = STA_MODIFY_KEY_MASK;
3243         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
3244
3245         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
3246
3247         spin_unlock_irqrestore(&priv->sta_lock, flags);
3248
3249         IWL_DEBUG_MAC80211("leave\n");
3250 }
3251
3252 static int iwl_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
3253                            const u8 *local_addr, const u8 *addr,
3254                            struct ieee80211_key_conf *key)
3255 {
3256         struct iwl_priv *priv = hw->priv;
3257         int ret = 0;
3258         u8 sta_id = IWL_INVALID_STATION;
3259         u8 is_default_wep_key = 0;
3260
3261         IWL_DEBUG_MAC80211("enter\n");
3262
3263         if (priv->hw_params.sw_crypto) {
3264                 IWL_DEBUG_MAC80211("leave - hwcrypto disabled\n");
3265                 return -EOPNOTSUPP;
3266         }
3267
3268         if (is_zero_ether_addr(addr))
3269                 /* only support pairwise keys */
3270                 return -EOPNOTSUPP;
3271
3272         sta_id = iwl_find_station(priv, addr);
3273         if (sta_id == IWL_INVALID_STATION) {
3274                 IWL_DEBUG_MAC80211("leave - %pM not in station map.\n",
3275                                    addr);
3276                 return -EINVAL;
3277
3278         }
3279
3280         mutex_lock(&priv->mutex);
3281         iwl_scan_cancel_timeout(priv, 100);
3282         mutex_unlock(&priv->mutex);
3283
3284         /* If we are getting WEP group key and we didn't receive any key mapping
3285          * so far, we are in legacy wep mode (group key only), otherwise we are
3286          * in 1X mode.
3287          * In legacy wep mode, we use another host command to the uCode */
3288         if (key->alg == ALG_WEP && sta_id == priv->hw_params.bcast_sta_id &&
3289                 priv->iw_mode != NL80211_IFTYPE_AP) {
3290                 if (cmd == SET_KEY)
3291                         is_default_wep_key = !priv->key_mapping_key;
3292                 else
3293                         is_default_wep_key =
3294                                         (key->hw_key_idx == HW_KEY_DEFAULT);
3295         }
3296
3297         switch (cmd) {
3298         case SET_KEY:
3299                 if (is_default_wep_key)
3300                         ret = iwl_set_default_wep_key(priv, key);
3301                 else
3302                         ret = iwl_set_dynamic_key(priv, key, sta_id);
3303
3304                 IWL_DEBUG_MAC80211("enable hwcrypto key\n");
3305                 break;
3306         case DISABLE_KEY:
3307                 if (is_default_wep_key)
3308                         ret = iwl_remove_default_wep_key(priv, key);
3309                 else
3310                         ret = iwl_remove_dynamic_key(priv, key, sta_id);
3311
3312                 IWL_DEBUG_MAC80211("disable hwcrypto key\n");
3313                 break;
3314         default:
3315                 ret = -EINVAL;
3316         }
3317
3318         IWL_DEBUG_MAC80211("leave\n");
3319
3320         return ret;
3321 }
3322
3323 static int iwl_mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
3324                            const struct ieee80211_tx_queue_params *params)
3325 {
3326         struct iwl_priv *priv = hw->priv;
3327         unsigned long flags;
3328         int q;
3329
3330         IWL_DEBUG_MAC80211("enter\n");
3331
3332         if (!iwl_is_ready_rf(priv)) {
3333                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
3334                 return -EIO;
3335         }
3336
3337         if (queue >= AC_NUM) {
3338                 IWL_DEBUG_MAC80211("leave - queue >= AC_NUM %d\n", queue);
3339                 return 0;
3340         }
3341
3342         if (!priv->qos_data.qos_enable) {
3343                 priv->qos_data.qos_active = 0;
3344                 IWL_DEBUG_MAC80211("leave - qos not enabled\n");
3345                 return 0;
3346         }
3347         q = AC_NUM - 1 - queue;
3348
3349         spin_lock_irqsave(&priv->lock, flags);
3350
3351         priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
3352         priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
3353         priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
3354         priv->qos_data.def_qos_parm.ac[q].edca_txop =
3355                         cpu_to_le16((params->txop * 32));
3356
3357         priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
3358         priv->qos_data.qos_active = 1;
3359
3360         if (priv->iw_mode == NL80211_IFTYPE_AP)
3361                 iwl_activate_qos(priv, 1);
3362         else if (priv->assoc_id && iwl_is_associated(priv))
3363                 iwl_activate_qos(priv, 0);
3364
3365         spin_unlock_irqrestore(&priv->lock, flags);
3366
3367         IWL_DEBUG_MAC80211("leave\n");
3368         return 0;
3369 }
3370
3371 static int iwl_mac_ampdu_action(struct ieee80211_hw *hw,
3372                              enum ieee80211_ampdu_mlme_action action,
3373                              struct ieee80211_sta *sta, u16 tid, u16 *ssn)
3374 {
3375         struct iwl_priv *priv = hw->priv;
3376
3377         IWL_DEBUG_HT("A-MPDU action on addr %pM tid %d\n",
3378                      sta->addr, tid);
3379
3380         if (!(priv->cfg->sku & IWL_SKU_N))
3381                 return -EACCES;
3382
3383         switch (action) {
3384         case IEEE80211_AMPDU_RX_START:
3385                 IWL_DEBUG_HT("start Rx\n");
3386                 return iwl_rx_agg_start(priv, sta->addr, tid, *ssn);
3387         case IEEE80211_AMPDU_RX_STOP:
3388                 IWL_DEBUG_HT("stop Rx\n");
3389                 return iwl_rx_agg_stop(priv, sta->addr, tid);
3390         case IEEE80211_AMPDU_TX_START:
3391                 IWL_DEBUG_HT("start Tx\n");
3392                 return iwl_tx_agg_start(priv, sta->addr, tid, ssn);
3393         case IEEE80211_AMPDU_TX_STOP:
3394                 IWL_DEBUG_HT("stop Tx\n");
3395                 return iwl_tx_agg_stop(priv, sta->addr, tid);
3396         default:
3397                 IWL_DEBUG_HT("unknown\n");
3398                 return -EINVAL;
3399                 break;
3400         }
3401         return 0;
3402 }
3403 static int iwl_mac_get_tx_stats(struct ieee80211_hw *hw,
3404                                 struct ieee80211_tx_queue_stats *stats)
3405 {
3406         struct iwl_priv *priv = hw->priv;
3407         int i, avail;
3408         struct iwl_tx_queue *txq;
3409         struct iwl_queue *q;
3410         unsigned long flags;
3411
3412         IWL_DEBUG_MAC80211("enter\n");
3413
3414         if (!iwl_is_ready_rf(priv)) {
3415                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
3416                 return -EIO;
3417         }
3418
3419         spin_lock_irqsave(&priv->lock, flags);
3420
3421         for (i = 0; i < AC_NUM; i++) {
3422                 txq = &priv->txq[i];
3423                 q = &txq->q;
3424                 avail = iwl_queue_space(q);
3425
3426                 stats[i].len = q->n_window - avail;
3427                 stats[i].limit = q->n_window - q->high_mark;
3428                 stats[i].count = q->n_window;
3429
3430         }
3431         spin_unlock_irqrestore(&priv->lock, flags);
3432
3433         IWL_DEBUG_MAC80211("leave\n");
3434
3435         return 0;
3436 }
3437
3438 static int iwl_mac_get_stats(struct ieee80211_hw *hw,
3439                              struct ieee80211_low_level_stats *stats)
3440 {
3441         struct iwl_priv *priv = hw->priv;
3442
3443         priv = hw->priv;
3444         IWL_DEBUG_MAC80211("enter\n");
3445         IWL_DEBUG_MAC80211("leave\n");
3446
3447         return 0;
3448 }
3449
3450 static void iwl_mac_reset_tsf(struct ieee80211_hw *hw)
3451 {
3452         struct iwl_priv *priv = hw->priv;
3453         unsigned long flags;
3454
3455         mutex_lock(&priv->mutex);
3456         IWL_DEBUG_MAC80211("enter\n");
3457
3458         spin_lock_irqsave(&priv->lock, flags);
3459         memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_info));
3460         spin_unlock_irqrestore(&priv->lock, flags);
3461
3462         iwl_reset_qos(priv);
3463
3464         spin_lock_irqsave(&priv->lock, flags);
3465         priv->assoc_id = 0;
3466         priv->assoc_capability = 0;
3467         priv->assoc_station_added = 0;
3468
3469         /* new association get rid of ibss beacon skb */
3470         if (priv->ibss_beacon)
3471                 dev_kfree_skb(priv->ibss_beacon);
3472
3473         priv->ibss_beacon = NULL;
3474
3475         priv->beacon_int = priv->hw->conf.beacon_int;
3476         priv->timestamp = 0;
3477         if ((priv->iw_mode == NL80211_IFTYPE_STATION))
3478                 priv->beacon_int = 0;
3479
3480         spin_unlock_irqrestore(&priv->lock, flags);
3481
3482         if (!iwl_is_ready_rf(priv)) {
3483                 IWL_DEBUG_MAC80211("leave - not ready\n");
3484                 mutex_unlock(&priv->mutex);
3485                 return;
3486         }
3487
3488         /* we are restarting association process
3489          * clear RXON_FILTER_ASSOC_MSK bit
3490          */
3491         if (priv->iw_mode != NL80211_IFTYPE_AP) {
3492                 iwl_scan_cancel_timeout(priv, 100);
3493                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
3494                 iwl_commit_rxon(priv);
3495         }
3496
3497         iwl_power_update_mode(priv, 0);
3498
3499         /* Per mac80211.h: This is only used in IBSS mode... */
3500         if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
3501
3502                 /* switch to CAM during association period.
3503                  * the ucode will block any association/authentication
3504                  * frome during assiciation period if it can not hear
3505                  * the AP because of PM. the timer enable PM back is
3506                  * association do not complete
3507                  */
3508                 if (priv->hw->conf.channel->flags & (IEEE80211_CHAN_PASSIVE_SCAN |
3509                                                      IEEE80211_CHAN_RADAR))
3510                                 iwl_power_disable_management(priv, 3000);
3511
3512                 IWL_DEBUG_MAC80211("leave - not in IBSS\n");
3513                 mutex_unlock(&priv->mutex);
3514                 return;
3515         }
3516
3517         iwl_set_rate(priv);
3518
3519         mutex_unlock(&priv->mutex);
3520
3521         IWL_DEBUG_MAC80211("leave\n");
3522 }
3523
3524 static int iwl_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb)
3525 {
3526         struct iwl_priv *priv = hw->priv;
3527         unsigned long flags;
3528         __le64 timestamp;
3529
3530         mutex_lock(&priv->mutex);
3531         IWL_DEBUG_MAC80211("enter\n");
3532
3533         if (!iwl_is_ready_rf(priv)) {
3534                 IWL_DEBUG_MAC80211("leave - RF not ready\n");
3535                 mutex_unlock(&priv->mutex);
3536                 return -EIO;
3537         }
3538
3539         if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
3540                 IWL_DEBUG_MAC80211("leave - not IBSS\n");
3541                 mutex_unlock(&priv->mutex);
3542                 return -EIO;
3543         }
3544
3545         spin_lock_irqsave(&priv->lock, flags);
3546
3547         if (priv->ibss_beacon)
3548                 dev_kfree_skb(priv->ibss_beacon);
3549
3550         priv->ibss_beacon = skb;
3551
3552         priv->assoc_id = 0;
3553         timestamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
3554         priv->timestamp = le64_to_cpu(timestamp);
3555
3556         IWL_DEBUG_MAC80211("leave\n");
3557         spin_unlock_irqrestore(&priv->lock, flags);
3558
3559         iwl_reset_qos(priv);
3560
3561         iwl_post_associate(priv);
3562
3563         mutex_unlock(&priv->mutex);
3564
3565         return 0;
3566 }
3567
3568 /*****************************************************************************
3569  *
3570  * sysfs attributes
3571  *
3572  *****************************************************************************/
3573
3574 #ifdef CONFIG_IWLWIFI_DEBUG
3575
3576 /*
3577  * The following adds a new attribute to the sysfs representation
3578  * of this device driver (i.e. a new file in /sys/bus/pci/drivers/iwl/)
3579  * used for controlling the debug level.
3580  *
3581  * See the level definitions in iwl for details.
3582  */
3583
3584 static ssize_t show_debug_level(struct device *d,
3585                                 struct device_attribute *attr, char *buf)
3586 {
3587         struct iwl_priv *priv = d->driver_data;
3588
3589         return sprintf(buf, "0x%08X\n", priv->debug_level);
3590 }
3591 static ssize_t store_debug_level(struct device *d,
3592                                 struct device_attribute *attr,
3593                                  const char *buf, size_t count)
3594 {
3595         struct iwl_priv *priv = d->driver_data;
3596         unsigned long val;
3597         int ret;
3598
3599         ret = strict_strtoul(buf, 0, &val);
3600         if (ret)
3601                 printk(KERN_INFO DRV_NAME
3602                        ": %s is not in hex or decimal form.\n", buf);
3603         else
3604                 priv->debug_level = val;
3605
3606         return strnlen(buf, count);
3607 }
3608
3609 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
3610                         show_debug_level, store_debug_level);
3611
3612
3613 #endif /* CONFIG_IWLWIFI_DEBUG */
3614
3615
3616 static ssize_t show_version(struct device *d,
3617                                 struct device_attribute *attr, char *buf)
3618 {
3619         struct iwl_priv *priv = d->driver_data;
3620         struct iwl_alive_resp *palive = &priv->card_alive;
3621         ssize_t pos = 0;
3622         u16 eeprom_ver;
3623
3624         if (palive->is_valid)
3625                 pos += sprintf(buf + pos,
3626                                 "fw version: 0x%01X.0x%01X.0x%01X.0x%01X\n"
3627                                 "fw type: 0x%01X 0x%01X\n",
3628                                 palive->ucode_major, palive->ucode_minor,
3629                                 palive->sw_rev[0], palive->sw_rev[1],
3630                                 palive->ver_type, palive->ver_subtype);
3631         else
3632                 pos += sprintf(buf + pos, "fw not loaded\n");
3633
3634         if (priv->eeprom) {
3635                 eeprom_ver = iwl_eeprom_query16(priv, EEPROM_VERSION);
3636                 pos += sprintf(buf + pos, "EEPROM version: 0x%x\n",
3637                                  eeprom_ver);
3638         } else {
3639                 pos += sprintf(buf + pos, "EEPROM not initialzed\n");
3640         }
3641
3642         return pos;
3643 }
3644
3645 static DEVICE_ATTR(version, S_IWUSR | S_IRUGO, show_version, NULL);
3646
3647 static ssize_t show_temperature(struct device *d,
3648                                 struct device_attribute *attr, char *buf)
3649 {
3650         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3651
3652         if (!iwl_is_alive(priv))
3653                 return -EAGAIN;
3654
3655         return sprintf(buf, "%d\n", priv->temperature);
3656 }
3657
3658 static DEVICE_ATTR(temperature, S_IRUGO, show_temperature, NULL);
3659
3660 static ssize_t show_tx_power(struct device *d,
3661                              struct device_attribute *attr, char *buf)
3662 {
3663         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3664         return sprintf(buf, "%d\n", priv->tx_power_user_lmt);
3665 }
3666
3667 static ssize_t store_tx_power(struct device *d,
3668                               struct device_attribute *attr,
3669                               const char *buf, size_t count)
3670 {
3671         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3672         unsigned long val;
3673         int ret;
3674
3675         ret = strict_strtoul(buf, 10, &val);
3676         if (ret)
3677                 printk(KERN_INFO DRV_NAME
3678                        ": %s is not in decimal form.\n", buf);
3679         else
3680                 iwl_set_tx_power(priv, val, false);
3681
3682         return count;
3683 }
3684
3685 static DEVICE_ATTR(tx_power, S_IWUSR | S_IRUGO, show_tx_power, store_tx_power);
3686
3687 static ssize_t show_flags(struct device *d,
3688                           struct device_attribute *attr, char *buf)
3689 {
3690         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3691
3692         return sprintf(buf, "0x%04X\n", priv->active_rxon.flags);
3693 }
3694
3695 static ssize_t store_flags(struct device *d,
3696                            struct device_attribute *attr,
3697                            const char *buf, size_t count)
3698 {
3699         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3700         unsigned long val;
3701         u32 flags;
3702         int ret = strict_strtoul(buf, 0, &val);
3703         if (ret)
3704                 return ret;
3705         flags = (u32)val;
3706
3707         mutex_lock(&priv->mutex);
3708         if (le32_to_cpu(priv->staging_rxon.flags) != flags) {
3709                 /* Cancel any currently running scans... */
3710                 if (iwl_scan_cancel_timeout(priv, 100))
3711                         IWL_WARNING("Could not cancel scan.\n");
3712                 else {
3713                         IWL_DEBUG_INFO("Commit rxon.flags = 0x%04X\n", flags);
3714                         priv->staging_rxon.flags = cpu_to_le32(flags);
3715                         iwl_commit_rxon(priv);
3716                 }
3717         }
3718         mutex_unlock(&priv->mutex);
3719
3720         return count;
3721 }
3722
3723 static DEVICE_ATTR(flags, S_IWUSR | S_IRUGO, show_flags, store_flags);
3724
3725 static ssize_t show_filter_flags(struct device *d,
3726                                  struct device_attribute *attr, char *buf)
3727 {
3728         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3729
3730         return sprintf(buf, "0x%04X\n",
3731                 le32_to_cpu(priv->active_rxon.filter_flags));
3732 }
3733
3734 static ssize_t store_filter_flags(struct device *d,
3735                                   struct device_attribute *attr,
3736                                   const char *buf, size_t count)
3737 {
3738         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
3739         unsigned long val;
3740         u32 filter_flags;
3741         int ret = strict_strtoul(buf, 0, &val);
3742         if (ret)
3743                 return ret;
3744         filter_flags = (u32)val;
3745
3746         mutex_lock(&priv->mutex);
3747         if (le32_to_cpu(priv->staging_rxon.filter_flags) != filter_flags) {
3748                 /* Cancel any currently running scans... */
3749                 if (iwl_scan_cancel_timeout(priv, 100))
3750                         IWL_WARNING("Could not cancel scan.\n");
3751                 else {
3752                         IWL_DEBUG_INFO("Committing rxon.filter_flags = "
3753                                        "0x%04X\n", filter_flags);
3754                         priv->staging_rxon.filter_flags =
3755                                 cpu_to_le32(filter_flags);
3756                         iwl_commit_rxon(priv);
3757                 }
3758         }
3759         mutex_unlock(&priv->mutex);
3760
3761         return count;
3762 }
3763
3764 static DEVICE_ATTR(filter_flags, S_IWUSR | S_IRUGO, show_filter_flags,
3765                    store_filter_flags);
3766
3767 #ifdef CONFIG_IWLAGN_SPECTRUM_MEASUREMENT
3768
3769 static ssize_t show_measurement(struct device *d,
3770                                 struct device_attribute *attr, char *buf)
3771 {
3772         struct iwl_priv *priv = dev_get_drvdata(d);
3773         struct iwl4965_spectrum_notification measure_report;
3774         u32 size = sizeof(measure_report), len = 0, ofs = 0;
3775         u8 *data = (u8 *)&measure_report;
3776         unsigned long flags;
3777
3778         spin_lock_irqsave(&priv->lock, flags);
3779         if (!(priv->measurement_status & MEASUREMENT_READY)) {
3780                 spin_unlock_irqrestore(&priv->lock, flags);
3781                 return 0;
3782         }
3783         memcpy(&measure_report, &priv->measure_report, size);
3784         priv->measurement_status = 0;
3785         spin_unlock_irqrestore(&priv->lock, flags);
3786
3787         while (size && (PAGE_SIZE - len)) {
3788                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
3789                                    PAGE_SIZE - len, 1);
3790                 len = strlen(buf);
3791                 if (PAGE_SIZE - len)
3792                         buf[len++] = '\n';
3793
3794                 ofs += 16;
3795                 size -= min(size, 16U);
3796         }
3797
3798         return len;
3799 }
3800
3801 static ssize_t store_measurement(struct device *d,
3802                                  struct device_attribute *attr,
3803                                  const char *buf, size_t count)
3804 {
3805         struct iwl_priv *priv = dev_get_drvdata(d);
3806         struct ieee80211_measurement_params params = {
3807                 .channel = le16_to_cpu(priv->active_rxon.channel),
3808                 .start_time = cpu_to_le64(priv->last_tsf),
3809                 .duration = cpu_to_le16(1),
3810         };
3811         u8 type = IWL_MEASURE_BASIC;
3812         u8 buffer[32];
3813         u8 channel;
3814
3815         if (count) {
3816                 char *p = buffer;
3817                 strncpy(buffer, buf, min(sizeof(buffer), count));
3818                 channel = simple_strtoul(p, NULL, 0);
3819                 if (channel)
3820                         params.channel = channel;
3821
3822                 p = buffer;
3823                 while (*p && *p != ' ')
3824                         p++;
3825                 if (*p)
3826                         type = simple_strtoul(p + 1, NULL, 0);
3827         }
3828
3829         IWL_DEBUG_INFO("Invoking measurement of type %d on "
3830                        "channel %d (for '%s')\n", type, params.channel, buf);
3831         iwl_get_measurement(priv, &params, type);
3832
3833         return count;
3834 }
3835
3836 static DEVICE_ATTR(measurement, S_IRUSR | S_IWUSR,
3837                    show_measurement, store_measurement);
3838 #endif /* CONFIG_IWLAGN_SPECTRUM_MEASUREMENT */
3839
3840 static ssize_t store_retry_rate(struct device *d,
3841                                 struct device_attribute *attr,
3842                                 const char *buf, size_t count)
3843 {
3844         struct iwl_priv *priv = dev_get_drvdata(d);
3845         long val;
3846         int ret  = strict_strtol(buf, 10, &val);
3847         if (!ret)
3848                 return ret;
3849
3850         priv->retry_rate = (val > 0) ? val : 1;
3851
3852         return count;
3853 }
3854
3855 static ssize_t show_retry_rate(struct device *d,
3856                                struct device_attribute *attr, char *buf)
3857 {
3858         struct iwl_priv *priv = dev_get_drvdata(d);
3859         return sprintf(buf, "%d", priv->retry_rate);
3860 }
3861
3862 static DEVICE_ATTR(retry_rate, S_IWUSR | S_IRUSR, show_retry_rate,
3863                    store_retry_rate);
3864
3865 static ssize_t store_power_level(struct device *d,
3866                                  struct device_attribute *attr,
3867                                  const char *buf, size_t count)
3868 {
3869         struct iwl_priv *priv = dev_get_drvdata(d);
3870         int ret;
3871         unsigned long mode;
3872
3873
3874         mutex_lock(&priv->mutex);
3875
3876         if (!iwl_is_ready(priv)) {
3877                 ret = -EAGAIN;
3878                 goto out;
3879         }
3880
3881         ret = strict_strtoul(buf, 10, &mode);
3882         if (ret)
3883                 goto out;
3884
3885         ret = iwl_power_set_user_mode(priv, mode);
3886         if (ret) {
3887                 IWL_DEBUG_MAC80211("failed setting power mode.\n");
3888                 goto out;
3889         }
3890         ret = count;
3891
3892  out:
3893         mutex_unlock(&priv->mutex);
3894         return ret;
3895 }
3896
3897 static ssize_t show_power_level(struct device *d,
3898                                 struct device_attribute *attr, char *buf)
3899 {
3900         struct iwl_priv *priv = dev_get_drvdata(d);
3901         int mode = priv->power_data.user_power_setting;
3902         int system = priv->power_data.system_power_setting;
3903         int level = priv->power_data.power_mode;
3904         char *p = buf;
3905
3906         switch (system) {
3907         case IWL_POWER_SYS_AUTO:
3908                 p += sprintf(p, "SYSTEM:auto");
3909                 break;
3910         case IWL_POWER_SYS_AC:
3911                 p += sprintf(p, "SYSTEM:ac");
3912                 break;
3913         case IWL_POWER_SYS_BATTERY:
3914                 p += sprintf(p, "SYSTEM:battery");
3915                 break;
3916         }
3917
3918         p += sprintf(p, "\tMODE:%s", (mode < IWL_POWER_AUTO)?"fixed":"auto");
3919         p += sprintf(p, "\tINDEX:%d", level);
3920         p += sprintf(p, "\n");
3921         return p - buf + 1;
3922 }
3923
3924 static DEVICE_ATTR(power_level, S_IWUSR | S_IRUSR, show_power_level,
3925                    store_power_level);
3926
3927 static ssize_t show_channels(struct device *d,
3928                              struct device_attribute *attr, char *buf)
3929 {
3930
3931         struct iwl_priv *priv = dev_get_drvdata(d);
3932         struct ieee80211_channel *channels = NULL;
3933         const struct ieee80211_supported_band *supp_band = NULL;
3934         int len = 0, i;
3935         int count = 0;
3936
3937         if (!test_bit(STATUS_GEO_CONFIGURED, &priv->status))
3938                 return -EAGAIN;
3939
3940         supp_band = iwl_get_hw_mode(priv, IEEE80211_BAND_2GHZ);
3941         channels = supp_band->channels;
3942         count = supp_band->n_channels;
3943
3944         len += sprintf(&buf[len],
3945                         "Displaying %d channels in 2.4GHz band "
3946                         "(802.11bg):\n", count);
3947
3948         for (i = 0; i < count; i++)
3949                 len += sprintf(&buf[len], "%d: %ddBm: BSS%s%s, %s.\n",
3950                                 ieee80211_frequency_to_channel(
3951                                 channels[i].center_freq),
3952                                 channels[i].max_power,
3953                                 channels[i].flags & IEEE80211_CHAN_RADAR ?
3954                                 " (IEEE 802.11h required)" : "",
3955                                 (!(channels[i].flags & IEEE80211_CHAN_NO_IBSS)
3956                                 || (channels[i].flags &
3957                                 IEEE80211_CHAN_RADAR)) ? "" :
3958                                 ", IBSS",
3959                                 channels[i].flags &
3960                                 IEEE80211_CHAN_PASSIVE_SCAN ?
3961                                 "passive only" : "active/passive");
3962
3963         supp_band = iwl_get_hw_mode(priv, IEEE80211_BAND_5GHZ);
3964         channels = supp_band->channels;
3965         count = supp_band->n_channels;
3966
3967         len += sprintf(&buf[len], "Displaying %d channels in 5.2GHz band "
3968                         "(802.11a):\n", count);
3969
3970         for (i = 0; i < count; i++)
3971                 len += sprintf(&buf[len], "%d: %ddBm: BSS%s%s, %s.\n",
3972                                 ieee80211_frequency_to_channel(
3973                                 channels[i].center_freq),
3974                                 channels[i].max_power,
3975                                 channels[i].flags & IEEE80211_CHAN_RADAR ?
3976                                 " (IEEE 802.11h required)" : "",
3977                                 ((channels[i].flags & IEEE80211_CHAN_NO_IBSS)
3978                                 || (channels[i].flags &
3979                                 IEEE80211_CHAN_RADAR)) ? "" :
3980                                 ", IBSS",
3981                                 channels[i].flags &
3982                                 IEEE80211_CHAN_PASSIVE_SCAN ?
3983                                 "passive only" : "active/passive");
3984
3985         return len;
3986 }
3987
3988 static DEVICE_ATTR(channels, S_IRUSR, show_channels, NULL);
3989
3990 static ssize_t show_statistics(struct device *d,
3991                                struct device_attribute *attr, char *buf)
3992 {
3993         struct iwl_priv *priv = dev_get_drvdata(d);
3994         u32 size = sizeof(struct iwl_notif_statistics);
3995         u32 len = 0, ofs = 0;
3996         u8 *data = (u8 *)&priv->statistics;
3997         int rc = 0;
3998
3999         if (!iwl_is_alive(priv))
4000                 return -EAGAIN;
4001
4002         mutex_lock(&priv->mutex);
4003         rc = iwl_send_statistics_request(priv, 0);
4004         mutex_unlock(&priv->mutex);
4005
4006         if (rc) {
4007                 len = sprintf(buf,
4008                               "Error sending statistics request: 0x%08X\n", rc);
4009                 return len;
4010         }
4011
4012         while (size && (PAGE_SIZE - len)) {
4013                 hex_dump_to_buffer(data + ofs, size, 16, 1, buf + len,
4014                                    PAGE_SIZE - len, 1);
4015                 len = strlen(buf);
4016                 if (PAGE_SIZE - len)
4017                         buf[len++] = '\n';
4018
4019                 ofs += 16;
4020                 size -= min(size, 16U);
4021         }
4022
4023         return len;
4024 }
4025
4026 static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
4027
4028 static ssize_t show_status(struct device *d,
4029                            struct device_attribute *attr, char *buf)
4030 {
4031         struct iwl_priv *priv = (struct iwl_priv *)d->driver_data;
4032         if (!iwl_is_alive(priv))
4033                 return -EAGAIN;
4034         return sprintf(buf, "0x%08x\n", (int)priv->status);
4035 }
4036
4037 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
4038
4039 /*****************************************************************************
4040  *
4041  * driver setup and teardown
4042  *
4043  *****************************************************************************/
4044
4045 static void iwl_setup_deferred_work(struct iwl_priv *priv)
4046 {
4047         priv->workqueue = create_workqueue(DRV_NAME);
4048
4049         init_waitqueue_head(&priv->wait_command_queue);
4050
4051         INIT_WORK(&priv->up, iwl_bg_up);
4052         INIT_WORK(&priv->restart, iwl_bg_restart);
4053         INIT_WORK(&priv->rx_replenish, iwl_bg_rx_replenish);
4054         INIT_WORK(&priv->rf_kill, iwl_bg_rf_kill);
4055         INIT_WORK(&priv->beacon_update, iwl_bg_beacon_update);
4056         INIT_WORK(&priv->set_monitor, iwl_bg_set_monitor);
4057         INIT_WORK(&priv->run_time_calib_work, iwl_bg_run_time_calib_work);
4058         INIT_DELAYED_WORK(&priv->init_alive_start, iwl_bg_init_alive_start);
4059         INIT_DELAYED_WORK(&priv->alive_start, iwl_bg_alive_start);
4060
4061         iwl_setup_scan_deferred_work(priv);
4062         iwl_setup_power_deferred_work(priv);
4063
4064         if (priv->cfg->ops->lib->setup_deferred_work)
4065                 priv->cfg->ops->lib->setup_deferred_work(priv);
4066
4067         init_timer(&priv->statistics_periodic);
4068         priv->statistics_periodic.data = (unsigned long)priv;
4069         priv->statistics_periodic.function = iwl_bg_statistics_periodic;
4070
4071         tasklet_init(&priv->irq_tasklet, (void (*)(unsigned long))
4072                      iwl_irq_tasklet, (unsigned long)priv);
4073 }
4074
4075 static void iwl_cancel_deferred_work(struct iwl_priv *priv)
4076 {
4077         if (priv->cfg->ops->lib->cancel_deferred_work)
4078                 priv->cfg->ops->lib->cancel_deferred_work(priv);
4079
4080         cancel_delayed_work_sync(&priv->init_alive_start);
4081         cancel_delayed_work(&priv->scan_check);
4082         cancel_delayed_work_sync(&priv->set_power_save);
4083         cancel_delayed_work(&priv->alive_start);
4084         cancel_work_sync(&priv->beacon_update);
4085         del_timer_sync(&priv->statistics_periodic);
4086 }
4087
4088 static struct attribute *iwl_sysfs_entries[] = {
4089         &dev_attr_channels.attr,
4090         &dev_attr_flags.attr,
4091         &dev_attr_filter_flags.attr,
4092 #ifdef CONFIG_IWLAGN_SPECTRUM_MEASUREMENT
4093         &dev_attr_measurement.attr,
4094 #endif
4095         &dev_attr_power_level.attr,
4096         &dev_attr_retry_rate.attr,
4097         &dev_attr_statistics.attr,
4098         &dev_attr_status.attr,
4099         &dev_attr_temperature.attr,
4100         &dev_attr_tx_power.attr,
4101 #ifdef CONFIG_IWLWIFI_DEBUG
4102         &dev_attr_debug_level.attr,
4103 #endif
4104         &dev_attr_version.attr,
4105
4106         NULL
4107 };
4108
4109 static struct attribute_group iwl_attribute_group = {
4110         .name = NULL,           /* put in device directory */
4111         .attrs = iwl_sysfs_entries,
4112 };
4113
4114 static struct ieee80211_ops iwl_hw_ops = {
4115         .tx = iwl_mac_tx,
4116         .start = iwl_mac_start,
4117         .stop = iwl_mac_stop,
4118         .add_interface = iwl_mac_add_interface,
4119         .remove_interface = iwl_mac_remove_interface,
4120         .config = iwl_mac_config,
4121         .config_interface = iwl_mac_config_interface,
4122         .configure_filter = iwl_configure_filter,
4123         .set_key = iwl_mac_set_key,
4124         .update_tkip_key = iwl_mac_update_tkip_key,
4125         .get_stats = iwl_mac_get_stats,
4126         .get_tx_stats = iwl_mac_get_tx_stats,
4127         .conf_tx = iwl_mac_conf_tx,
4128         .reset_tsf = iwl_mac_reset_tsf,
4129         .bss_info_changed = iwl_bss_info_changed,
4130         .ampdu_action = iwl_mac_ampdu_action,
4131         .hw_scan = iwl_mac_hw_scan
4132 };
4133
4134 static int iwl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
4135 {
4136         int err = 0;
4137         struct iwl_priv *priv;
4138         struct ieee80211_hw *hw;
4139         struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
4140         unsigned long flags;
4141
4142         /************************
4143          * 1. Allocating HW data
4144          ************************/
4145
4146         /* Disabling hardware scan means that mac80211 will perform scans
4147          * "the hard way", rather than using device's scan. */
4148         if (cfg->mod_params->disable_hw_scan) {
4149                 if (cfg->mod_params->debug & IWL_DL_INFO)
4150                         dev_printk(KERN_DEBUG, &(pdev->dev),
4151                                    "Disabling hw_scan\n");
4152                 iwl_hw_ops.hw_scan = NULL;
4153         }
4154
4155         hw = iwl_alloc_all(cfg, &iwl_hw_ops);
4156         if (!hw) {
4157                 err = -ENOMEM;
4158                 goto out;
4159         }
4160         priv = hw->priv;
4161         /* At this point both hw and priv are allocated. */
4162
4163         SET_IEEE80211_DEV(hw, &pdev->dev);
4164
4165         IWL_DEBUG_INFO("*** LOAD DRIVER ***\n");
4166         priv->cfg = cfg;
4167         priv->pci_dev = pdev;
4168
4169 #ifdef CONFIG_IWLWIFI_DEBUG
4170         priv->debug_level = priv->cfg->mod_params->debug;
4171         atomic_set(&priv->restrict_refcnt, 0);
4172 #endif
4173
4174         /**************************
4175          * 2. Initializing PCI bus
4176          **************************/
4177         if (pci_enable_device(pdev)) {
4178                 err = -ENODEV;
4179                 goto out_ieee80211_free_hw;
4180         }
4181
4182         pci_set_master(pdev);
4183
4184         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(36));
4185         if (!err)
4186                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(36));
4187         if (err) {
4188                 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
4189                 if (!err)
4190                         err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
4191                 /* both attempts failed: */
4192                 if (err) {
4193                         printk(KERN_WARNING "%s: No suitable DMA available.\n",
4194                                 DRV_NAME);
4195                         goto out_pci_disable_device;
4196                 }
4197         }
4198
4199         err = pci_request_regions(pdev, DRV_NAME);
4200         if (err)
4201                 goto out_pci_disable_device;
4202
4203         pci_set_drvdata(pdev, priv);
4204
4205
4206         /***********************
4207          * 3. Read REV register
4208          ***********************/
4209         priv->hw_base = pci_iomap(pdev, 0, 0);
4210         if (!priv->hw_base) {
4211                 err = -ENODEV;
4212                 goto out_pci_release_regions;
4213         }
4214
4215         IWL_DEBUG_INFO("pci_resource_len = 0x%08llx\n",
4216                 (unsigned long long) pci_resource_len(pdev, 0));
4217         IWL_DEBUG_INFO("pci_resource_base = %p\n", priv->hw_base);
4218
4219         iwl_hw_detect(priv);
4220         printk(KERN_INFO DRV_NAME
4221                 ": Detected Intel Wireless WiFi Link %s REV=0x%X\n",
4222                 priv->cfg->name, priv->hw_rev);
4223
4224         /* We disable the RETRY_TIMEOUT register (0x41) to keep
4225          * PCI Tx retries from interfering with C3 CPU state */
4226         pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
4227
4228         /* amp init */
4229         err = priv->cfg->ops->lib->apm_ops.init(priv);
4230         if (err < 0) {
4231                 IWL_DEBUG_INFO("Failed to init APMG\n");
4232                 goto out_iounmap;
4233         }
4234         /*****************
4235          * 4. Read EEPROM
4236          *****************/
4237         /* Read the EEPROM */
4238         err = iwl_eeprom_init(priv);
4239         if (err) {
4240                 IWL_ERROR("Unable to init EEPROM\n");
4241                 goto out_iounmap;
4242         }
4243         err = iwl_eeprom_check_version(priv);
4244         if (err)
4245                 goto out_iounmap;
4246
4247         /* extract MAC Address */
4248         iwl_eeprom_get_mac(priv, priv->mac_addr);
4249         IWL_DEBUG_INFO("MAC address: %pM\n", priv->mac_addr);
4250         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
4251
4252         /************************
4253          * 5. Setup HW constants
4254          ************************/
4255         if (iwl_set_hw_params(priv)) {
4256                 IWL_ERROR("failed to set hw parameters\n");
4257                 goto out_free_eeprom;
4258         }
4259
4260         /*******************
4261          * 6. Setup priv
4262          *******************/
4263
4264         err = iwl_init_drv(priv);
4265         if (err)
4266                 goto out_free_eeprom;
4267         /* At this point both hw and priv are initialized. */
4268
4269         /**********************************
4270          * 7. Initialize module parameters
4271          **********************************/
4272
4273         /* Disable radio (SW RF KILL) via parameter when loading driver */
4274         if (priv->cfg->mod_params->disable) {
4275                 set_bit(STATUS_RF_KILL_SW, &priv->status);
4276                 IWL_DEBUG_INFO("Radio disabled.\n");
4277         }
4278
4279         /********************
4280          * 8. Setup services
4281          ********************/
4282         spin_lock_irqsave(&priv->lock, flags);
4283         iwl_disable_interrupts(priv);
4284         spin_unlock_irqrestore(&priv->lock, flags);
4285
4286         err = sysfs_create_group(&pdev->dev.kobj, &iwl_attribute_group);
4287         if (err) {
4288                 IWL_ERROR("failed to create sysfs device attributes\n");
4289                 goto out_uninit_drv;
4290         }
4291
4292
4293         iwl_setup_deferred_work(priv);
4294         iwl_setup_rx_handlers(priv);
4295
4296         /********************
4297          * 9. Conclude
4298          ********************/
4299         pci_save_state(pdev);
4300         pci_disable_device(pdev);
4301
4302         /**********************************
4303          * 10. Setup and register mac80211
4304          **********************************/
4305
4306         err = iwl_setup_mac(priv);
4307         if (err)
4308                 goto out_remove_sysfs;
4309
4310         err = iwl_dbgfs_register(priv, DRV_NAME);
4311         if (err)
4312                 IWL_ERROR("failed to create debugfs files\n");
4313
4314         err = iwl_rfkill_init(priv);
4315         if (err)
4316                 IWL_ERROR("Unable to initialize RFKILL system. "
4317                                   "Ignoring error: %d\n", err);
4318         iwl_power_initialize(priv);
4319         return 0;
4320
4321  out_remove_sysfs:
4322         sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
4323  out_uninit_drv:
4324         iwl_uninit_drv(priv);
4325  out_free_eeprom:
4326         iwl_eeprom_free(priv);
4327  out_iounmap:
4328         pci_iounmap(pdev, priv->hw_base);
4329  out_pci_release_regions:
4330         pci_release_regions(pdev);
4331         pci_set_drvdata(pdev, NULL);
4332  out_pci_disable_device:
4333         pci_disable_device(pdev);
4334  out_ieee80211_free_hw:
4335         ieee80211_free_hw(priv->hw);
4336  out:
4337         return err;
4338 }
4339
4340 static void __devexit iwl_pci_remove(struct pci_dev *pdev)
4341 {
4342         struct iwl_priv *priv = pci_get_drvdata(pdev);
4343         unsigned long flags;
4344
4345         if (!priv)
4346                 return;
4347
4348         IWL_DEBUG_INFO("*** UNLOAD DRIVER ***\n");
4349
4350         iwl_dbgfs_unregister(priv);
4351         sysfs_remove_group(&pdev->dev.kobj, &iwl_attribute_group);
4352
4353         /* ieee80211_unregister_hw call wil cause iwl_mac_stop to
4354          * to be called and iwl_down since we are removing the device
4355          * we need to set STATUS_EXIT_PENDING bit.
4356          */
4357         set_bit(STATUS_EXIT_PENDING, &priv->status);
4358         if (priv->mac80211_registered) {
4359                 ieee80211_unregister_hw(priv->hw);
4360                 priv->mac80211_registered = 0;
4361         } else {
4362                 iwl_down(priv);
4363         }
4364
4365         /* make sure we flush any pending irq or
4366          * tasklet for the driver
4367          */
4368         spin_lock_irqsave(&priv->lock, flags);
4369         iwl_disable_interrupts(priv);
4370         spin_unlock_irqrestore(&priv->lock, flags);
4371
4372         iwl_synchronize_irq(priv);
4373
4374         iwl_rfkill_unregister(priv);
4375         iwl_dealloc_ucode_pci(priv);
4376
4377         if (priv->rxq.bd)
4378                 iwl_rx_queue_free(priv, &priv->rxq);
4379         iwl_hw_txq_ctx_free(priv);
4380
4381         iwl_clear_stations_table(priv);
4382         iwl_eeprom_free(priv);
4383
4384
4385         /*netif_stop_queue(dev); */
4386         flush_workqueue(priv->workqueue);
4387
4388         /* ieee80211_unregister_hw calls iwl_mac_stop, which flushes
4389          * priv->workqueue... so we can't take down the workqueue
4390          * until now... */
4391         destroy_workqueue(priv->workqueue);
4392         priv->workqueue = NULL;
4393
4394         pci_iounmap(pdev, priv->hw_base);
4395         pci_release_regions(pdev);
4396         pci_disable_device(pdev);
4397         pci_set_drvdata(pdev, NULL);
4398
4399         iwl_uninit_drv(priv);
4400
4401         if (priv->ibss_beacon)
4402                 dev_kfree_skb(priv->ibss_beacon);
4403
4404         ieee80211_free_hw(priv->hw);
4405 }
4406
4407 #ifdef CONFIG_PM
4408
4409 static int iwl_pci_suspend(struct pci_dev *pdev, pm_message_t state)
4410 {
4411         struct iwl_priv *priv = pci_get_drvdata(pdev);
4412
4413         if (priv->is_open) {
4414                 set_bit(STATUS_IN_SUSPEND, &priv->status);
4415                 iwl_mac_stop(priv->hw);
4416                 priv->is_open = 1;
4417         }
4418
4419         pci_set_power_state(pdev, PCI_D3hot);
4420
4421         return 0;
4422 }
4423
4424 static int iwl_pci_resume(struct pci_dev *pdev)
4425 {
4426         struct iwl_priv *priv = pci_get_drvdata(pdev);
4427
4428         pci_set_power_state(pdev, PCI_D0);
4429
4430         if (priv->is_open)
4431                 iwl_mac_start(priv->hw);
4432
4433         clear_bit(STATUS_IN_SUSPEND, &priv->status);
4434         return 0;
4435 }
4436
4437 #endif /* CONFIG_PM */
4438
4439 /*****************************************************************************
4440  *
4441  * driver and module entry point
4442  *
4443  *****************************************************************************/
4444
4445 /* Hardware specific file defines the PCI IDs table for that hardware module */
4446 static struct pci_device_id iwl_hw_card_ids[] = {
4447 #ifdef CONFIG_IWL4965
4448         {IWL_PCI_DEVICE(0x4229, PCI_ANY_ID, iwl4965_agn_cfg)},
4449         {IWL_PCI_DEVICE(0x4230, PCI_ANY_ID, iwl4965_agn_cfg)},
4450 #endif /* CONFIG_IWL4965 */
4451 #ifdef CONFIG_IWL5000
4452         {IWL_PCI_DEVICE(0x4232, 0x1205, iwl5100_bg_cfg)},
4453         {IWL_PCI_DEVICE(0x4232, 0x1305, iwl5100_bg_cfg)},
4454         {IWL_PCI_DEVICE(0x4232, 0x1206, iwl5100_abg_cfg)},
4455         {IWL_PCI_DEVICE(0x4232, 0x1306, iwl5100_abg_cfg)},
4456         {IWL_PCI_DEVICE(0x4232, 0x1326, iwl5100_abg_cfg)},
4457         {IWL_PCI_DEVICE(0x4237, 0x1216, iwl5100_abg_cfg)},
4458         {IWL_PCI_DEVICE(0x4232, PCI_ANY_ID, iwl5100_agn_cfg)},
4459         {IWL_PCI_DEVICE(0x4235, PCI_ANY_ID, iwl5300_agn_cfg)},
4460         {IWL_PCI_DEVICE(0x4236, PCI_ANY_ID, iwl5300_agn_cfg)},
4461         {IWL_PCI_DEVICE(0x4237, PCI_ANY_ID, iwl5100_agn_cfg)},
4462 /* 5350 WiFi/WiMax */
4463         {IWL_PCI_DEVICE(0x423A, 0x1001, iwl5350_agn_cfg)},
4464         {IWL_PCI_DEVICE(0x423A, 0x1021, iwl5350_agn_cfg)},
4465         {IWL_PCI_DEVICE(0x423B, 0x1011, iwl5350_agn_cfg)},
4466 #endif /* CONFIG_IWL5000 */
4467         {0}
4468 };
4469 MODULE_DEVICE_TABLE(pci, iwl_hw_card_ids);
4470
4471 static struct pci_driver iwl_driver = {
4472         .name = DRV_NAME,
4473         .id_table = iwl_hw_card_ids,
4474         .probe = iwl_pci_probe,
4475         .remove = __devexit_p(iwl_pci_remove),
4476 #ifdef CONFIG_PM
4477         .suspend = iwl_pci_suspend,
4478         .resume = iwl_pci_resume,
4479 #endif
4480 };
4481
4482 static int __init iwl_init(void)
4483 {
4484
4485         int ret;
4486         printk(KERN_INFO DRV_NAME ": " DRV_DESCRIPTION ", " DRV_VERSION "\n");
4487         printk(KERN_INFO DRV_NAME ": " DRV_COPYRIGHT "\n");
4488
4489         ret = iwlagn_rate_control_register();
4490         if (ret) {
4491                 IWL_ERROR("Unable to register rate control algorithm: %d\n", ret);
4492                 return ret;
4493         }
4494
4495         ret = pci_register_driver(&iwl_driver);
4496         if (ret) {
4497                 IWL_ERROR("Unable to initialize PCI module\n");
4498                 goto error_register;
4499         }
4500
4501         return ret;
4502
4503 error_register:
4504         iwlagn_rate_control_unregister();
4505         return ret;
4506 }
4507
4508 static void __exit iwl_exit(void)
4509 {
4510         pci_unregister_driver(&iwl_driver);
4511         iwlagn_rate_control_unregister();
4512 }
4513
4514 module_exit(iwl_exit);
4515 module_init(iwl_init);