Pileus Git - ~andy/linux/blob - drivers/net/wireless/iwlwifi/iwl-agn-lib.c

   1 /******************************************************************************
   2  *
   3  * GPL LICENSE SUMMARY
   4  *
   5  * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of version 2 of the GNU General Public License as
   9  * published by the Free Software Foundation.
  10  *
  11  * This program is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
  19  * USA
  20  *
  21  * The full GNU General Public License is included in this distribution
  22  * in the file called LICENSE.GPL.
  23  *
  24  * Contact Information:
  25  *  Intel Linux Wireless <ilw@linux.intel.com>
  26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27  *
  28  *****************************************************************************/
  29 #include <linux/etherdevice.h>
  30 #include <linux/kernel.h>
  31 #include <linux/module.h>
  32 #include <linux/init.h>
  33 #include <linux/sched.h>
  34
  35 #include "iwl-dev.h"
  36 #include "iwl-core.h"
  37 #include "iwl-io.h"
  38 #include "iwl-helpers.h"
  39 #include "iwl-agn-hw.h"
  40 #include "iwl-agn.h"
  41 #include "iwl-sta.h"
  42 #include "iwl-trans.h"
  43 #include "iwl-shared.h"
  44
  45 int iwlagn_hw_valid_rtc_data_addr(u32 addr)
  46 {
  47         return (addr >= IWLAGN_RTC_DATA_LOWER_BOUND) &&
  48                 (addr < IWLAGN_RTC_DATA_UPPER_BOUND);
  49 }
  50
  51 int iwlagn_send_tx_power(struct iwl_priv *priv)
  52 {
  53         struct iwlagn_tx_power_dbm_cmd tx_power_cmd;
  54         u8 tx_ant_cfg_cmd;
  55
  56         if (WARN_ONCE(test_bit(STATUS_SCAN_HW, &priv->shrd->status),
  57                       "TX Power requested while scanning!\n"))
  58                 return -EAGAIN;
  59
  60         /* half dBm need to multiply */
  61         tx_power_cmd.global_lmt = (s8)(2 * priv->tx_power_user_lmt);
  62
  63         if (priv->tx_power_lmt_in_half_dbm &&
  64             priv->tx_power_lmt_in_half_dbm < tx_power_cmd.global_lmt) {
  65                 /*
  66                  * For the newer devices which using enhanced/extend tx power
  67                  * table in EEPROM, the format is in half dBm. driver need to
  68                  * convert to dBm format before report to mac80211.
  69                  * By doing so, there is a possibility of 1/2 dBm resolution
  70                  * lost. driver will perform "round-up" operation before
  71                  * reporting, but it will cause 1/2 dBm tx power over the
  72                  * regulatory limit. Perform the checking here, if the
  73                  * "tx_power_user_lmt" is higher than EEPROM value (in
  74                  * half-dBm format), lower the tx power based on EEPROM
  75                  */
  76                 tx_power_cmd.global_lmt = priv->tx_power_lmt_in_half_dbm;
  77         }
  78         tx_power_cmd.flags = IWLAGN_TX_POWER_NO_CLOSED;
  79         tx_power_cmd.srv_chan_lmt = IWLAGN_TX_POWER_AUTO;
  80
  81         if (IWL_UCODE_API(priv->ucode_ver) == 1)
  82                 tx_ant_cfg_cmd = REPLY_TX_POWER_DBM_CMD_V1;
  83         else
  84                 tx_ant_cfg_cmd = REPLY_TX_POWER_DBM_CMD;
  85
  86         return iwl_trans_send_cmd_pdu(trans(priv), tx_ant_cfg_cmd, CMD_SYNC,
  87                         sizeof(tx_power_cmd), &tx_power_cmd);
  88 }
  89
  90 void iwlagn_temperature(struct iwl_priv *priv)
  91 {
  92         /* store temperature from correct statistics (in Celsius) */
  93         priv->temperature = le32_to_cpu(priv->statistics.common.temperature);
  94         iwl_tt_handler(priv);
  95 }
  96
  97 u16 iwlagn_eeprom_calib_version(struct iwl_priv *priv)
  98 {
  99         struct iwl_eeprom_calib_hdr *hdr;
 100
 101         hdr = (struct iwl_eeprom_calib_hdr *)iwl_eeprom_query_addr(priv,
 102                                                         EEPROM_CALIB_ALL);
 103         return hdr->version;
 104
 105 }
 106
 107 /*
 108  * EEPROM
 109  */
 110 static u32 eeprom_indirect_address(const struct iwl_priv *priv, u32 address)
 111 {
 112         u16 offset = 0;
 113
 114         if ((address & INDIRECT_ADDRESS) == 0)
 115                 return address;
 116
 117         switch (address & INDIRECT_TYPE_MSK) {
 118         case INDIRECT_HOST:
 119                 offset = iwl_eeprom_query16(priv, EEPROM_LINK_HOST);
 120                 break;
 121         case INDIRECT_GENERAL:
 122                 offset = iwl_eeprom_query16(priv, EEPROM_LINK_GENERAL);
 123                 break;
 124         case INDIRECT_REGULATORY:
 125                 offset = iwl_eeprom_query16(priv, EEPROM_LINK_REGULATORY);
 126                 break;
 127         case INDIRECT_TXP_LIMIT:
 128                 offset = iwl_eeprom_query16(priv, EEPROM_LINK_TXP_LIMIT);
 129                 break;
 130         case INDIRECT_TXP_LIMIT_SIZE:
 131                 offset = iwl_eeprom_query16(priv, EEPROM_LINK_TXP_LIMIT_SIZE);
 132                 break;
 133         case INDIRECT_CALIBRATION:
 134                 offset = iwl_eeprom_query16(priv, EEPROM_LINK_CALIBRATION);
 135                 break;
 136         case INDIRECT_PROCESS_ADJST:
 137                 offset = iwl_eeprom_query16(priv, EEPROM_LINK_PROCESS_ADJST);
 138                 break;
 139         case INDIRECT_OTHERS:
 140                 offset = iwl_eeprom_query16(priv, EEPROM_LINK_OTHERS);
 141                 break;
 142         default:
 143                 IWL_ERR(priv, "illegal indirect type: 0x%X\n",
 144                 address & INDIRECT_TYPE_MSK);
 145                 break;
 146         }
 147
 148         /* translate the offset from words to byte */
 149         return (address & ADDRESS_MSK) + (offset << 1);
 150 }
 151
 152 const u8 *iwl_eeprom_query_addr(const struct iwl_priv *priv, size_t offset)
 153 {
 154         u32 address = eeprom_indirect_address(priv, offset);
 155         BUG_ON(address >= priv->cfg->base_params->eeprom_size);
 156         return &priv->eeprom[address];
 157 }
 158
 159 struct iwl_mod_params iwlagn_mod_params = {
 160         .amsdu_size_8K = 1,
 161         .restart_fw = 1,
 162         .plcp_check = true,
 163         .bt_coex_active = true,
 164         .no_sleep_autoadjust = true,
 165         .power_level = IWL_POWER_INDEX_1,
 166         .bt_ch_announce = true,
 167         .wanted_ucode_alternative = 1,
 168         .auto_agg = true,
 169         /* the rest are 0 by default */
 170 };
 171
 172 int iwlagn_hwrate_to_mac80211_idx(u32 rate_n_flags, enum ieee80211_band band)
 173 {
 174         int idx = 0;
 175         int band_offset = 0;
 176
 177         /* HT rate format: mac80211 wants an MCS number, which is just LSB */
 178         if (rate_n_flags & RATE_MCS_HT_MSK) {
 179                 idx = (rate_n_flags & 0xff);
 180                 return idx;
 181         /* Legacy rate format, search for match in table */
 182         } else {
 183                 if (band == IEEE80211_BAND_5GHZ)
 184                         band_offset = IWL_FIRST_OFDM_RATE;
 185                 for (idx = band_offset; idx < IWL_RATE_COUNT_LEGACY; idx++)
 186                         if (iwl_rates[idx].plcp == (rate_n_flags & 0xFF))
 187                                 return idx - band_offset;
 188         }
 189
 190         return -1;
 191 }
 192
 193 int iwlagn_manage_ibss_station(struct iwl_priv *priv,
 194                                struct ieee80211_vif *vif, bool add)
 195 {
 196         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
 197
 198         if (add)
 199                 return iwlagn_add_bssid_station(priv, vif_priv->ctx,
 200                                                 vif->bss_conf.bssid,
 201                                                 &vif_priv->ibss_bssid_sta_id);
 202         return iwl_remove_station(priv, vif_priv->ibss_bssid_sta_id,
 203                                   vif->bss_conf.bssid);
 204 }
 205
 206 /**
 207  * iwlagn_txfifo_flush: send REPLY_TXFIFO_FLUSH command to uCode
 208  *
 209  * pre-requirements:
 210  *  1. acquire mutex before calling
 211  *  2. make sure rf is on and not in exit state
 212  */
 213 int iwlagn_txfifo_flush(struct iwl_priv *priv, u16 flush_control)
 214 {
 215         struct iwl_txfifo_flush_cmd flush_cmd;
 216         struct iwl_host_cmd cmd = {
 217                 .id = REPLY_TXFIFO_FLUSH,
 218                 .len = { sizeof(struct iwl_txfifo_flush_cmd), },
 219                 .flags = CMD_SYNC,
 220                 .data = { &flush_cmd, },
 221         };
 222
 223         might_sleep();
 224
 225         memset(&flush_cmd, 0, sizeof(flush_cmd));
 226         if (flush_control & BIT(IWL_RXON_CTX_BSS))
 227                 flush_cmd.fifo_control = IWL_SCD_VO_MSK | IWL_SCD_VI_MSK |
 228                                  IWL_SCD_BE_MSK | IWL_SCD_BK_MSK |
 229                                  IWL_SCD_MGMT_MSK;
 230         if ((flush_control & BIT(IWL_RXON_CTX_PAN)) &&
 231             (priv->shrd->valid_contexts != BIT(IWL_RXON_CTX_BSS)))
 232                 flush_cmd.fifo_control |= IWL_PAN_SCD_VO_MSK |
 233                                 IWL_PAN_SCD_VI_MSK | IWL_PAN_SCD_BE_MSK |
 234                                 IWL_PAN_SCD_BK_MSK | IWL_PAN_SCD_MGMT_MSK |
 235                                 IWL_PAN_SCD_MULTICAST_MSK;
 236
 237         if (priv->cfg->sku & EEPROM_SKU_CAP_11N_ENABLE)
 238                 flush_cmd.fifo_control |= IWL_AGG_TX_QUEUE_MSK;
 239
 240         IWL_DEBUG_INFO(priv, "fifo queue control: 0X%x\n",
 241                        flush_cmd.fifo_control);
 242         flush_cmd.flush_control = cpu_to_le16(flush_control);
 243
 244         return iwl_trans_send_cmd(trans(priv), &cmd);
 245 }
 246
 247 void iwlagn_dev_txfifo_flush(struct iwl_priv *priv, u16 flush_control)
 248 {
 249         mutex_lock(&priv->shrd->mutex);
 250         ieee80211_stop_queues(priv->hw);
 251         if (iwlagn_txfifo_flush(priv, IWL_DROP_ALL)) {
 252                 IWL_ERR(priv, "flush request fail\n");
 253                 goto done;
 254         }
 255         IWL_DEBUG_INFO(priv, "wait transmit/flush all frames\n");
 256         iwl_trans_wait_tx_queue_empty(trans(priv));
 257 done:
 258         ieee80211_wake_queues(priv->hw);
 259         mutex_unlock(&priv->shrd->mutex);
 260 }
 261
 262 /*
 263  * BT coex
 264  */
 265 /*
 266  * Macros to access the lookup table.
 267  *
 268  * The lookup table has 7 inputs: bt3_prio, bt3_txrx, bt_rf_act, wifi_req,
 269 * wifi_prio, wifi_txrx and wifi_sh_ant_req.
 270  *
 271  * It has three outputs: WLAN_ACTIVE, WLAN_KILL and ANT_SWITCH
 272  *
 273  * The format is that "registers" 8 through 11 contain the WLAN_ACTIVE bits
 274  * one after another in 32-bit registers, and "registers" 0 through 7 contain
 275  * the WLAN_KILL and ANT_SWITCH bits interleaved (in that order).
 276  *
 277  * These macros encode that format.
 278  */
 279 #define LUT_VALUE(bt3_prio, bt3_txrx, bt_rf_act, wifi_req, wifi_prio, \
 280                   wifi_txrx, wifi_sh_ant_req) \
 281         (bt3_prio | (bt3_txrx << 1) | (bt_rf_act << 2) | (wifi_req << 3) | \
 282         (wifi_prio << 4) | (wifi_txrx << 5) | (wifi_sh_ant_req << 6))
 283
 284 #define LUT_PTA_WLAN_ACTIVE_OP(lut, op, val) \
 285         lut[8 + ((val) >> 5)] op (cpu_to_le32(BIT((val) & 0x1f)))
 286 #define LUT_TEST_PTA_WLAN_ACTIVE(lut, bt3_prio, bt3_txrx, bt_rf_act, wifi_req, \
 287                                  wifi_prio, wifi_txrx, wifi_sh_ant_req) \
 288         (!!(LUT_PTA_WLAN_ACTIVE_OP(lut, &, LUT_VALUE(bt3_prio, bt3_txrx, \
 289                                    bt_rf_act, wifi_req, wifi_prio, wifi_txrx, \
 290                                    wifi_sh_ant_req))))
 291 #define LUT_SET_PTA_WLAN_ACTIVE(lut, bt3_prio, bt3_txrx, bt_rf_act, wifi_req, \
 292                                 wifi_prio, wifi_txrx, wifi_sh_ant_req) \
 293         LUT_PTA_WLAN_ACTIVE_OP(lut, |=, LUT_VALUE(bt3_prio, bt3_txrx, \
 294                                bt_rf_act, wifi_req, wifi_prio, wifi_txrx, \
 295                                wifi_sh_ant_req))
 296 #define LUT_CLEAR_PTA_WLAN_ACTIVE(lut, bt3_prio, bt3_txrx, bt_rf_act, \
 297                                   wifi_req, wifi_prio, wifi_txrx, \
 298                                   wifi_sh_ant_req) \
 299         LUT_PTA_WLAN_ACTIVE_OP(lut, &= ~, LUT_VALUE(bt3_prio, bt3_txrx, \
 300                                bt_rf_act, wifi_req, wifi_prio, wifi_txrx, \
 301                                wifi_sh_ant_req))
 302
 303 #define LUT_WLAN_KILL_OP(lut, op, val) \
 304         lut[(val) >> 4] op (cpu_to_le32(BIT(((val) << 1) & 0x1e)))
 305 #define LUT_TEST_WLAN_KILL(lut, bt3_prio, bt3_txrx, bt_rf_act, wifi_req, \
 306                            wifi_prio, wifi_txrx, wifi_sh_ant_req) \
 307         (!!(LUT_WLAN_KILL_OP(lut, &, LUT_VALUE(bt3_prio, bt3_txrx, bt_rf_act, \
 308                              wifi_req, wifi_prio, wifi_txrx, wifi_sh_ant_req))))
 309 #define LUT_SET_WLAN_KILL(lut, bt3_prio, bt3_txrx, bt_rf_act, wifi_req, \
 310                           wifi_prio, wifi_txrx, wifi_sh_ant_req) \
 311         LUT_WLAN_KILL_OP(lut, |=, LUT_VALUE(bt3_prio, bt3_txrx, bt_rf_act, \
 312                          wifi_req, wifi_prio, wifi_txrx, wifi_sh_ant_req))
 313 #define LUT_CLEAR_WLAN_KILL(lut, bt3_prio, bt3_txrx, bt_rf_act, wifi_req, \
 314                             wifi_prio, wifi_txrx, wifi_sh_ant_req) \
 315         LUT_WLAN_KILL_OP(lut, &= ~, LUT_VALUE(bt3_prio, bt3_txrx, bt_rf_act, \
 316                          wifi_req, wifi_prio, wifi_txrx, wifi_sh_ant_req))
 317
 318 #define LUT_ANT_SWITCH_OP(lut, op, val) \
 319         lut[(val) >> 4] op (cpu_to_le32(BIT((((val) << 1) & 0x1e) + 1)))
 320 #define LUT_TEST_ANT_SWITCH(lut, bt3_prio, bt3_txrx, bt_rf_act, wifi_req, \
 321                             wifi_prio, wifi_txrx, wifi_sh_ant_req) \
 322         (!!(LUT_ANT_SWITCH_OP(lut, &, LUT_VALUE(bt3_prio, bt3_txrx, bt_rf_act, \
 323                               wifi_req, wifi_prio, wifi_txrx, \
 324                               wifi_sh_ant_req))))
 325 #define LUT_SET_ANT_SWITCH(lut, bt3_prio, bt3_txrx, bt_rf_act, wifi_req, \
 326                            wifi_prio, wifi_txrx, wifi_sh_ant_req) \
 327         LUT_ANT_SWITCH_OP(lut, |=, LUT_VALUE(bt3_prio, bt3_txrx, bt_rf_act, \
 328                           wifi_req, wifi_prio, wifi_txrx, wifi_sh_ant_req))
 329 #define LUT_CLEAR_ANT_SWITCH(lut, bt3_prio, bt3_txrx, bt_rf_act, wifi_req, \
 330                              wifi_prio, wifi_txrx, wifi_sh_ant_req) \
 331         LUT_ANT_SWITCH_OP(lut, &= ~, LUT_VALUE(bt3_prio, bt3_txrx, bt_rf_act, \
 332                           wifi_req, wifi_prio, wifi_txrx, wifi_sh_ant_req))
 333
 334 static const __le32 iwlagn_def_3w_lookup[12] = {
 335         cpu_to_le32(0xaaaaaaaa),
 336         cpu_to_le32(0xaaaaaaaa),
 337         cpu_to_le32(0xaeaaaaaa),
 338         cpu_to_le32(0xaaaaaaaa),
 339         cpu_to_le32(0xcc00ff28),
 340         cpu_to_le32(0x0000aaaa),
 341         cpu_to_le32(0xcc00aaaa),
 342         cpu_to_le32(0x0000aaaa),
 343         cpu_to_le32(0xc0004000),
 344         cpu_to_le32(0x00004000),
 345         cpu_to_le32(0xf0005000),
 346         cpu_to_le32(0xf0005000),
 347 };
 348
 349 static const __le32 iwlagn_concurrent_lookup[12] = {
 350         cpu_to_le32(0xaaaaaaaa),
 351         cpu_to_le32(0xaaaaaaaa),
 352         cpu_to_le32(0xaaaaaaaa),
 353         cpu_to_le32(0xaaaaaaaa),
 354         cpu_to_le32(0xaaaaaaaa),
 355         cpu_to_le32(0xaaaaaaaa),
 356         cpu_to_le32(0xaaaaaaaa),
 357         cpu_to_le32(0xaaaaaaaa),
 358         cpu_to_le32(0x00000000),
 359         cpu_to_le32(0x00000000),
 360         cpu_to_le32(0x00000000),
 361         cpu_to_le32(0x00000000),
 362 };
 363
 364 void iwlagn_send_advance_bt_config(struct iwl_priv *priv)
 365 {
 366         struct iwl_basic_bt_cmd basic = {
 367                 .max_kill = IWLAGN_BT_MAX_KILL_DEFAULT,
 368                 .bt3_timer_t7_value = IWLAGN_BT3_T7_DEFAULT,
 369                 .bt3_prio_sample_time = IWLAGN_BT3_PRIO_SAMPLE_DEFAULT,
 370                 .bt3_timer_t2_value = IWLAGN_BT3_T2_DEFAULT,
 371         };
 372         struct iwl6000_bt_cmd bt_cmd_6000;
 373         struct iwl2000_bt_cmd bt_cmd_2000;
 374         int ret;
 375
 376         BUILD_BUG_ON(sizeof(iwlagn_def_3w_lookup) !=
 377                         sizeof(basic.bt3_lookup_table));
 378
 379         if (priv->cfg->bt_params) {
 380                 if (priv->cfg->bt_params->bt_session_2) {
 381                         bt_cmd_2000.prio_boost = cpu_to_le32(
 382                                 priv->cfg->bt_params->bt_prio_boost);
 383                         bt_cmd_2000.tx_prio_boost = 0;
 384                         bt_cmd_2000.rx_prio_boost = 0;
 385                 } else {
 386                         bt_cmd_6000.prio_boost =
 387                                 priv->cfg->bt_params->bt_prio_boost;
 388                         bt_cmd_6000.tx_prio_boost = 0;
 389                         bt_cmd_6000.rx_prio_boost = 0;
 390                 }
 391         } else {
 392                 IWL_ERR(priv, "failed to construct BT Coex Config\n");
 393                 return;
 394         }
 395
 396         basic.kill_ack_mask = priv->kill_ack_mask;
 397         basic.kill_cts_mask = priv->kill_cts_mask;
 398         basic.valid = priv->bt_valid;
 399
 400         /*
 401          * Configure BT coex mode to "no coexistence" when the
 402          * user disabled BT coexistence, we have no interface
 403          * (might be in monitor mode), or the interface is in
 404          * IBSS mode (no proper uCode support for coex then).
 405          */
 406         if (!iwlagn_mod_params.bt_coex_active ||
 407             priv->iw_mode == NL80211_IFTYPE_ADHOC) {
 408                 basic.flags = IWLAGN_BT_FLAG_COEX_MODE_DISABLED;
 409         } else {
 410                 basic.flags = IWLAGN_BT_FLAG_COEX_MODE_3W <<
 411                                         IWLAGN_BT_FLAG_COEX_MODE_SHIFT;
 412
 413                 if (!priv->bt_enable_pspoll)
 414                         basic.flags |= IWLAGN_BT_FLAG_SYNC_2_BT_DISABLE;
 415                 else
 416                         basic.flags &= ~IWLAGN_BT_FLAG_SYNC_2_BT_DISABLE;
 417
 418                 if (priv->bt_ch_announce)
 419                         basic.flags |= IWLAGN_BT_FLAG_CHANNEL_INHIBITION;
 420                 IWL_DEBUG_COEX(priv, "BT coex flag: 0X%x\n", basic.flags);
 421         }
 422         priv->bt_enable_flag = basic.flags;
 423         if (priv->bt_full_concurrent)
 424                 memcpy(basic.bt3_lookup_table, iwlagn_concurrent_lookup,
 425                         sizeof(iwlagn_concurrent_lookup));
 426         else
 427                 memcpy(basic.bt3_lookup_table, iwlagn_def_3w_lookup,
 428                         sizeof(iwlagn_def_3w_lookup));
 429
 430         IWL_DEBUG_COEX(priv, "BT coex %s in %s mode\n",
 431                        basic.flags ? "active" : "disabled",
 432                        priv->bt_full_concurrent ?
 433                        "full concurrency" : "3-wire");
 434
 435         if (priv->cfg->bt_params->bt_session_2) {
 436                 memcpy(&bt_cmd_2000.basic, &basic,
 437                         sizeof(basic));
 438                 ret = iwl_trans_send_cmd_pdu(trans(priv), REPLY_BT_CONFIG,
 439                         CMD_SYNC, sizeof(bt_cmd_2000), &bt_cmd_2000);
 440         } else {
 441                 memcpy(&bt_cmd_6000.basic, &basic,
 442                         sizeof(basic));
 443                 ret = iwl_trans_send_cmd_pdu(trans(priv), REPLY_BT_CONFIG,
 444                         CMD_SYNC, sizeof(bt_cmd_6000), &bt_cmd_6000);
 445         }
 446         if (ret)
 447                 IWL_ERR(priv, "failed to send BT Coex Config\n");
 448
 449 }
 450
 451 void iwlagn_bt_adjust_rssi_monitor(struct iwl_priv *priv, bool rssi_ena)
 452 {
 453         struct iwl_rxon_context *ctx, *found_ctx = NULL;
 454         bool found_ap = false;
 455
 456         lockdep_assert_held(&priv->shrd->mutex);
 457
 458         /* Check whether AP or GO mode is active. */
 459         if (rssi_ena) {
 460                 for_each_context(priv, ctx) {
 461                         if (ctx->vif && ctx->vif->type == NL80211_IFTYPE_AP &&
 462                             iwl_is_associated_ctx(ctx)) {
 463                                 found_ap = true;
 464                                 break;
 465                         }
 466                 }
 467         }
 468
 469         /*
 470          * If disable was received or If GO/AP mode, disable RSSI
 471          * measurements.
 472          */
 473         if (!rssi_ena || found_ap) {
 474                 if (priv->cur_rssi_ctx) {
 475                         ctx = priv->cur_rssi_ctx;
 476                         ieee80211_disable_rssi_reports(ctx->vif);
 477                         priv->cur_rssi_ctx = NULL;
 478                 }
 479                 return;
 480         }
 481
 482         /*
 483          * If rssi measurements need to be enabled, consider all cases now.
 484          * Figure out how many contexts are active.
 485          */
 486         for_each_context(priv, ctx) {
 487                 if (ctx->vif && ctx->vif->type == NL80211_IFTYPE_STATION &&
 488                     iwl_is_associated_ctx(ctx)) {
 489                         found_ctx = ctx;
 490                         break;
 491                 }
 492         }
 493
 494         /*
 495          * rssi monitor already enabled for the correct interface...nothing
 496          * to do.
 497          */
 498         if (found_ctx == priv->cur_rssi_ctx)
 499                 return;
 500
 501         /*
 502          * Figure out if rssi monitor is currently enabled, and needs
 503          * to be changed. If rssi monitor is already enabled, disable
 504          * it first else just enable rssi measurements on the
 505          * interface found above.
 506          */
 507         if (priv->cur_rssi_ctx) {
 508                 ctx = priv->cur_rssi_ctx;
 509                 if (ctx->vif)
 510                         ieee80211_disable_rssi_reports(ctx->vif);
 511         }
 512
 513         priv->cur_rssi_ctx = found_ctx;
 514
 515         if (!found_ctx)
 516                 return;
 517
 518         ieee80211_enable_rssi_reports(found_ctx->vif,
 519                         IWLAGN_BT_PSP_MIN_RSSI_THRESHOLD,
 520                         IWLAGN_BT_PSP_MAX_RSSI_THRESHOLD);
 521 }
 522
 523 static bool iwlagn_bt_traffic_is_sco(struct iwl_bt_uart_msg *uart_msg)
 524 {
 525         return BT_UART_MSG_FRAME3SCOESCO_MSK & uart_msg->frame3 >>
 526                         BT_UART_MSG_FRAME3SCOESCO_POS;
 527 }
 528
 529 static void iwlagn_bt_traffic_change_work(struct work_struct *work)
 530 {
 531         struct iwl_priv *priv =
 532                 container_of(work, struct iwl_priv, bt_traffic_change_work);
 533         struct iwl_rxon_context *ctx;
 534         int smps_request = -1;
 535
 536         if (priv->bt_enable_flag == IWLAGN_BT_FLAG_COEX_MODE_DISABLED) {
 537                 /* bt coex disabled */
 538                 return;
 539         }
 540
 541         /*
 542          * Note: bt_traffic_load can be overridden by scan complete and
 543          * coex profile notifications. Ignore that since only bad consequence
 544          * can be not matching debug print with actual state.
 545          */
 546         IWL_DEBUG_COEX(priv, "BT traffic load changes: %d\n",
 547                        priv->bt_traffic_load);
 548
 549         switch (priv->bt_traffic_load) {
 550         case IWL_BT_COEX_TRAFFIC_LOAD_NONE:
 551                 if (priv->bt_status)
 552                         smps_request = IEEE80211_SMPS_DYNAMIC;
 553                 else
 554                         smps_request = IEEE80211_SMPS_AUTOMATIC;
 555                 break;
 556         case IWL_BT_COEX_TRAFFIC_LOAD_LOW:
 557                 smps_request = IEEE80211_SMPS_DYNAMIC;
 558                 break;
 559         case IWL_BT_COEX_TRAFFIC_LOAD_HIGH:
 560         case IWL_BT_COEX_TRAFFIC_LOAD_CONTINUOUS:
 561                 smps_request = IEEE80211_SMPS_STATIC;
 562                 break;
 563         default:
 564                 IWL_ERR(priv, "Invalid BT traffic load: %d\n",
 565                         priv->bt_traffic_load);
 566                 break;
 567         }
 568
 569         mutex_lock(&priv->shrd->mutex);
 570
 571         /*
 572          * We can not send command to firmware while scanning. When the scan
 573          * complete we will schedule this work again. We do check with mutex
 574          * locked to prevent new scan request to arrive. We do not check
 575          * STATUS_SCANNING to avoid race when queue_work two times from
 576          * different notifications, but quit and not perform any work at all.
 577          */
 578         if (test_bit(STATUS_SCAN_HW, &priv->shrd->status))
 579                 goto out;
 580
 581         iwl_update_chain_flags(priv);
 582
 583         if (smps_request != -1) {
 584                 priv->current_ht_config.smps = smps_request;
 585                 for_each_context(priv, ctx) {
 586                         if (ctx->vif && ctx->vif->type == NL80211_IFTYPE_STATION)
 587                                 ieee80211_request_smps(ctx->vif, smps_request);
 588                 }
 589         }
 590
 591         /*
 592          * Dynamic PS poll related functionality. Adjust RSSI measurements if
 593          * necessary.
 594          */
 595         iwlagn_bt_coex_rssi_monitor(priv);
 596 out:
 597         mutex_unlock(&priv->shrd->mutex);
 598 }
 599
 600 /*
 601  * If BT sco traffic, and RSSI monitor is enabled, move measurements to the
 602  * correct interface or disable it if this is the last interface to be
 603  * removed.
 604  */
 605 void iwlagn_bt_coex_rssi_monitor(struct iwl_priv *priv)
 606 {
 607         if (priv->bt_is_sco &&
 608             priv->bt_traffic_load == IWL_BT_COEX_TRAFFIC_LOAD_CONTINUOUS)
 609                 iwlagn_bt_adjust_rssi_monitor(priv, true);
 610         else
 611                 iwlagn_bt_adjust_rssi_monitor(priv, false);
 612 }
 613
 614 static void iwlagn_print_uartmsg(struct iwl_priv *priv,
 615                                 struct iwl_bt_uart_msg *uart_msg)
 616 {
 617         IWL_DEBUG_COEX(priv, "Message Type = 0x%X, SSN = 0x%X, "
 618                         "Update Req = 0x%X",
 619                 (BT_UART_MSG_FRAME1MSGTYPE_MSK & uart_msg->frame1) >>
 620                         BT_UART_MSG_FRAME1MSGTYPE_POS,
 621                 (BT_UART_MSG_FRAME1SSN_MSK & uart_msg->frame1) >>
 622                         BT_UART_MSG_FRAME1SSN_POS,
 623                 (BT_UART_MSG_FRAME1UPDATEREQ_MSK & uart_msg->frame1) >>
 624                         BT_UART_MSG_FRAME1UPDATEREQ_POS);
 625
 626         IWL_DEBUG_COEX(priv, "Open connections = 0x%X, Traffic load = 0x%X, "
 627                         "Chl_SeqN = 0x%X, In band = 0x%X",
 628                 (BT_UART_MSG_FRAME2OPENCONNECTIONS_MSK & uart_msg->frame2) >>
 629                         BT_UART_MSG_FRAME2OPENCONNECTIONS_POS,
 630                 (BT_UART_MSG_FRAME2TRAFFICLOAD_MSK & uart_msg->frame2) >>
 631                         BT_UART_MSG_FRAME2TRAFFICLOAD_POS,
 632                 (BT_UART_MSG_FRAME2CHLSEQN_MSK & uart_msg->frame2) >>
 633                         BT_UART_MSG_FRAME2CHLSEQN_POS,
 634                 (BT_UART_MSG_FRAME2INBAND_MSK & uart_msg->frame2) >>
 635                         BT_UART_MSG_FRAME2INBAND_POS);
 636
 637         IWL_DEBUG_COEX(priv, "SCO/eSCO = 0x%X, Sniff = 0x%X, A2DP = 0x%X, "
 638                         "ACL = 0x%X, Master = 0x%X, OBEX = 0x%X",
 639                 (BT_UART_MSG_FRAME3SCOESCO_MSK & uart_msg->frame3) >>
 640                         BT_UART_MSG_FRAME3SCOESCO_POS,
 641                 (BT_UART_MSG_FRAME3SNIFF_MSK & uart_msg->frame3) >>
 642                         BT_UART_MSG_FRAME3SNIFF_POS,
 643                 (BT_UART_MSG_FRAME3A2DP_MSK & uart_msg->frame3) >>
 644                         BT_UART_MSG_FRAME3A2DP_POS,
 645                 (BT_UART_MSG_FRAME3ACL_MSK & uart_msg->frame3) >>
 646                         BT_UART_MSG_FRAME3ACL_POS,
 647                 (BT_UART_MSG_FRAME3MASTER_MSK & uart_msg->frame3) >>
 648                         BT_UART_MSG_FRAME3MASTER_POS,
 649                 (BT_UART_MSG_FRAME3OBEX_MSK & uart_msg->frame3) >>
 650                         BT_UART_MSG_FRAME3OBEX_POS);
 651
 652         IWL_DEBUG_COEX(priv, "Idle duration = 0x%X",
 653                 (BT_UART_MSG_FRAME4IDLEDURATION_MSK & uart_msg->frame4) >>
 654                         BT_UART_MSG_FRAME4IDLEDURATION_POS);
 655
 656         IWL_DEBUG_COEX(priv, "Tx Activity = 0x%X, Rx Activity = 0x%X, "
 657                         "eSCO Retransmissions = 0x%X",
 658                 (BT_UART_MSG_FRAME5TXACTIVITY_MSK & uart_msg->frame5) >>
 659                         BT_UART_MSG_FRAME5TXACTIVITY_POS,
 660                 (BT_UART_MSG_FRAME5RXACTIVITY_MSK & uart_msg->frame5) >>
 661                         BT_UART_MSG_FRAME5RXACTIVITY_POS,
 662                 (BT_UART_MSG_FRAME5ESCORETRANSMIT_MSK & uart_msg->frame5) >>
 663                         BT_UART_MSG_FRAME5ESCORETRANSMIT_POS);
 664
 665         IWL_DEBUG_COEX(priv, "Sniff Interval = 0x%X, Discoverable = 0x%X",
 666                 (BT_UART_MSG_FRAME6SNIFFINTERVAL_MSK & uart_msg->frame6) >>
 667                         BT_UART_MSG_FRAME6SNIFFINTERVAL_POS,
 668                 (BT_UART_MSG_FRAME6DISCOVERABLE_MSK & uart_msg->frame6) >>
 669                         BT_UART_MSG_FRAME6DISCOVERABLE_POS);
 670
 671         IWL_DEBUG_COEX(priv, "Sniff Activity = 0x%X, Page = "
 672                         "0x%X, Inquiry = 0x%X, Connectable = 0x%X",
 673                 (BT_UART_MSG_FRAME7SNIFFACTIVITY_MSK & uart_msg->frame7) >>
 674                         BT_UART_MSG_FRAME7SNIFFACTIVITY_POS,
 675                 (BT_UART_MSG_FRAME7PAGE_MSK & uart_msg->frame7) >>
 676                         BT_UART_MSG_FRAME7PAGE_POS,
 677                 (BT_UART_MSG_FRAME7INQUIRY_MSK & uart_msg->frame7) >>
 678                         BT_UART_MSG_FRAME7INQUIRY_POS,
 679                 (BT_UART_MSG_FRAME7CONNECTABLE_MSK & uart_msg->frame7) >>
 680                         BT_UART_MSG_FRAME7CONNECTABLE_POS);
 681 }
 682
 683 static void iwlagn_set_kill_msk(struct iwl_priv *priv,
 684                                 struct iwl_bt_uart_msg *uart_msg)
 685 {
 686         u8 kill_msk;
 687         static const __le32 bt_kill_ack_msg[2] = {
 688                 IWLAGN_BT_KILL_ACK_MASK_DEFAULT,
 689                 IWLAGN_BT_KILL_ACK_CTS_MASK_SCO };
 690         static const __le32 bt_kill_cts_msg[2] = {
 691                 IWLAGN_BT_KILL_CTS_MASK_DEFAULT,
 692                 IWLAGN_BT_KILL_ACK_CTS_MASK_SCO };
 693
 694         kill_msk = (BT_UART_MSG_FRAME3SCOESCO_MSK & uart_msg->frame3)
 695                 ? 1 : 0;
 696         if (priv->kill_ack_mask != bt_kill_ack_msg[kill_msk] ||
 697             priv->kill_cts_mask != bt_kill_cts_msg[kill_msk]) {
 698                 priv->bt_valid |= IWLAGN_BT_VALID_KILL_ACK_MASK;
 699                 priv->kill_ack_mask = bt_kill_ack_msg[kill_msk];
 700                 priv->bt_valid |= IWLAGN_BT_VALID_KILL_CTS_MASK;
 701                 priv->kill_cts_mask = bt_kill_cts_msg[kill_msk];
 702
 703                 /* schedule to send runtime bt_config */
 704                 queue_work(priv->shrd->workqueue, &priv->bt_runtime_config);
 705         }
 706 }
 707
 708 int iwlagn_bt_coex_profile_notif(struct iwl_priv *priv,
 709                                   struct iwl_rx_mem_buffer *rxb,
 710                                   struct iwl_device_cmd *cmd)
 711 {
 712         unsigned long flags;
 713         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 714         struct iwl_bt_coex_profile_notif *coex = &pkt->u.bt_coex_profile_notif;
 715         struct iwl_bt_uart_msg *uart_msg = &coex->last_bt_uart_msg;
 716
 717         if (priv->bt_enable_flag == IWLAGN_BT_FLAG_COEX_MODE_DISABLED) {
 718                 /* bt coex disabled */
 719                 return 0;
 720         }
 721
 722         IWL_DEBUG_COEX(priv, "BT Coex notification:\n");
 723         IWL_DEBUG_COEX(priv, "    status: %d\n", coex->bt_status);
 724         IWL_DEBUG_COEX(priv, "    traffic load: %d\n", coex->bt_traffic_load);
 725         IWL_DEBUG_COEX(priv, "    CI compliance: %d\n",
 726                         coex->bt_ci_compliance);
 727         iwlagn_print_uartmsg(priv, uart_msg);
 728
 729         priv->last_bt_traffic_load = priv->bt_traffic_load;
 730         priv->bt_is_sco = iwlagn_bt_traffic_is_sco(uart_msg);
 731
 732         if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
 733                 if (priv->bt_status != coex->bt_status ||
 734                     priv->last_bt_traffic_load != coex->bt_traffic_load) {
 735                         if (coex->bt_status) {
 736                                 /* BT on */
 737                                 if (!priv->bt_ch_announce)
 738                                         priv->bt_traffic_load =
 739                                                 IWL_BT_COEX_TRAFFIC_LOAD_HIGH;
 740                                 else
 741                                         priv->bt_traffic_load =
 742                                                 coex->bt_traffic_load;
 743                         } else {
 744                                 /* BT off */
 745                                 priv->bt_traffic_load =
 746                                         IWL_BT_COEX_TRAFFIC_LOAD_NONE;
 747                         }
 748                         priv->bt_status = coex->bt_status;
 749                         queue_work(priv->shrd->workqueue,
 750                                    &priv->bt_traffic_change_work);
 751                 }
 752         }
 753
 754         iwlagn_set_kill_msk(priv, uart_msg);
 755
 756         /* FIXME: based on notification, adjust the prio_boost */
 757
 758         spin_lock_irqsave(&priv->shrd->lock, flags);
 759         priv->bt_ci_compliance = coex->bt_ci_compliance;
 760         spin_unlock_irqrestore(&priv->shrd->lock, flags);
 761         return 0;
 762 }
 763
 764 void iwlagn_bt_rx_handler_setup(struct iwl_priv *priv)
 765 {
 766         priv->rx_handlers[REPLY_BT_COEX_PROFILE_NOTIF] =
 767                 iwlagn_bt_coex_profile_notif;
 768 }
 769
 770 void iwlagn_bt_setup_deferred_work(struct iwl_priv *priv)
 771 {
 772         INIT_WORK(&priv->bt_traffic_change_work,
 773                   iwlagn_bt_traffic_change_work);
 774 }
 775
 776 void iwlagn_bt_cancel_deferred_work(struct iwl_priv *priv)
 777 {
 778         cancel_work_sync(&priv->bt_traffic_change_work);
 779 }
 780
 781 static bool is_single_rx_stream(struct iwl_priv *priv)
 782 {
 783         return priv->current_ht_config.smps == IEEE80211_SMPS_STATIC ||
 784                priv->current_ht_config.single_chain_sufficient;
 785 }
 786
 787 #define IWL_NUM_RX_CHAINS_MULTIPLE      3
 788 #define IWL_NUM_RX_CHAINS_SINGLE        2
 789 #define IWL_NUM_IDLE_CHAINS_DUAL        2
 790 #define IWL_NUM_IDLE_CHAINS_SINGLE      1
 791
 792 /*
 793  * Determine how many receiver/antenna chains to use.
 794  *
 795  * More provides better reception via diversity.  Fewer saves power
 796  * at the expense of throughput, but only when not in powersave to
 797  * start with.
 798  *
 799  * MIMO (dual stream) requires at least 2, but works better with 3.
 800  * This does not determine *which* chains to use, just how many.
 801  */
 802 static int iwl_get_active_rx_chain_count(struct iwl_priv *priv)
 803 {
 804         if (priv->cfg->bt_params &&
 805             priv->cfg->bt_params->advanced_bt_coexist &&
 806             (priv->bt_full_concurrent ||
 807              priv->bt_traffic_load >= IWL_BT_COEX_TRAFFIC_LOAD_HIGH)) {
 808                 /*
 809                  * only use chain 'A' in bt high traffic load or
 810                  * full concurrency mode
 811                  */
 812                 return IWL_NUM_RX_CHAINS_SINGLE;
 813         }
 814         /* # of Rx chains to use when expecting MIMO. */
 815         if (is_single_rx_stream(priv))
 816                 return IWL_NUM_RX_CHAINS_SINGLE;
 817         else
 818                 return IWL_NUM_RX_CHAINS_MULTIPLE;
 819 }
 820
 821 /*
 822  * When we are in power saving mode, unless device support spatial
 823  * multiplexing power save, use the active count for rx chain count.
 824  */
 825 static int iwl_get_idle_rx_chain_count(struct iwl_priv *priv, int active_cnt)
 826 {
 827         /* # Rx chains when idling, depending on SMPS mode */
 828         switch (priv->current_ht_config.smps) {
 829         case IEEE80211_SMPS_STATIC:
 830         case IEEE80211_SMPS_DYNAMIC:
 831                 return IWL_NUM_IDLE_CHAINS_SINGLE;
 832         case IEEE80211_SMPS_OFF:
 833                 return active_cnt;
 834         default:
 835                 WARN(1, "invalid SMPS mode %d",
 836                      priv->current_ht_config.smps);
 837                 return active_cnt;
 838         }
 839 }
 840
 841 /* up to 4 chains */
 842 static u8 iwl_count_chain_bitmap(u32 chain_bitmap)
 843 {
 844         u8 res;
 845         res = (chain_bitmap & BIT(0)) >> 0;
 846         res += (chain_bitmap & BIT(1)) >> 1;
 847         res += (chain_bitmap & BIT(2)) >> 2;
 848         res += (chain_bitmap & BIT(3)) >> 3;
 849         return res;
 850 }
 851
 852 /**
 853  * iwlagn_set_rxon_chain - Set up Rx chain usage in "staging" RXON image
 854  *
 855  * Selects how many and which Rx receivers/antennas/chains to use.
 856  * This should not be used for scan command ... it puts data in wrong place.
 857  */
 858 void iwlagn_set_rxon_chain(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
 859 {
 860         bool is_single = is_single_rx_stream(priv);
 861         bool is_cam = !test_bit(STATUS_POWER_PMI, &priv->shrd->status);
 862         u8 idle_rx_cnt, active_rx_cnt, valid_rx_cnt;
 863         u32 active_chains;
 864         u16 rx_chain;
 865
 866         /* Tell uCode which antennas are actually connected.
 867          * Before first association, we assume all antennas are connected.
 868          * Just after first association, iwl_chain_noise_calibration()
 869          *    checks which antennas actually *are* connected. */
 870         if (priv->chain_noise_data.active_chains)
 871                 active_chains = priv->chain_noise_data.active_chains;
 872         else
 873                 active_chains = hw_params(priv).valid_rx_ant;
 874
 875         if (priv->cfg->bt_params &&
 876             priv->cfg->bt_params->advanced_bt_coexist &&
 877             (priv->bt_full_concurrent ||
 878              priv->bt_traffic_load >= IWL_BT_COEX_TRAFFIC_LOAD_HIGH)) {
 879                 /*
 880                  * only use chain 'A' in bt high traffic load or
 881                  * full concurrency mode
 882                  */
 883                 active_chains = first_antenna(active_chains);
 884         }
 885
 886         rx_chain = active_chains << RXON_RX_CHAIN_VALID_POS;
 887
 888         /* How many receivers should we use? */
 889         active_rx_cnt = iwl_get_active_rx_chain_count(priv);
 890         idle_rx_cnt = iwl_get_idle_rx_chain_count(priv, active_rx_cnt);
 891
 892
 893         /* correct rx chain count according hw settings
 894          * and chain noise calibration
 895          */
 896         valid_rx_cnt = iwl_count_chain_bitmap(active_chains);
 897         if (valid_rx_cnt < active_rx_cnt)
 898                 active_rx_cnt = valid_rx_cnt;
 899
 900         if (valid_rx_cnt < idle_rx_cnt)
 901                 idle_rx_cnt = valid_rx_cnt;
 902
 903         rx_chain |= active_rx_cnt << RXON_RX_CHAIN_MIMO_CNT_POS;
 904         rx_chain |= idle_rx_cnt  << RXON_RX_CHAIN_CNT_POS;
 905
 906         ctx->staging.rx_chain = cpu_to_le16(rx_chain);
 907
 908         if (!is_single && (active_rx_cnt >= IWL_NUM_RX_CHAINS_SINGLE) && is_cam)
 909                 ctx->staging.rx_chain |= RXON_RX_CHAIN_MIMO_FORCE_MSK;
 910         else
 911                 ctx->staging.rx_chain &= ~RXON_RX_CHAIN_MIMO_FORCE_MSK;
 912
 913         IWL_DEBUG_ASSOC(priv, "rx_chain=0x%X active=%d idle=%d\n",
 914                         ctx->staging.rx_chain,
 915                         active_rx_cnt, idle_rx_cnt);
 916
 917         WARN_ON(active_rx_cnt == 0 || idle_rx_cnt == 0 ||
 918                 active_rx_cnt < idle_rx_cnt);
 919 }
 920
 921 u8 iwl_toggle_tx_ant(struct iwl_priv *priv, u8 ant, u8 valid)
 922 {
 923         int i;
 924         u8 ind = ant;
 925
 926         if (priv->band == IEEE80211_BAND_2GHZ &&
 927             priv->bt_traffic_load >= IWL_BT_COEX_TRAFFIC_LOAD_HIGH)
 928                 return 0;
 929
 930         for (i = 0; i < RATE_ANT_NUM - 1; i++) {
 931                 ind = (ind + 1) < RATE_ANT_NUM ?  ind + 1 : 0;
 932                 if (valid & BIT(ind))
 933                         return ind;
 934         }
 935         return ant;
 936 }
 937
 938 /* notification wait support */
 939 void iwlagn_init_notification_wait(struct iwl_priv *priv,
 940                                    struct iwl_notification_wait *wait_entry,
 941                                    u8 cmd,
 942                                    void (*fn)(struct iwl_priv *priv,
 943                                               struct iwl_rx_packet *pkt,
 944                                               void *data),
 945                                    void *fn_data)
 946 {
 947         wait_entry->fn = fn;
 948         wait_entry->fn_data = fn_data;
 949         wait_entry->cmd = cmd;
 950         wait_entry->triggered = false;
 951         wait_entry->aborted = false;
 952
 953         spin_lock_bh(&priv->notif_wait_lock);
 954         list_add(&wait_entry->list, &priv->notif_waits);
 955         spin_unlock_bh(&priv->notif_wait_lock);
 956 }
 957
 958 int iwlagn_wait_notification(struct iwl_priv *priv,
 959                              struct iwl_notification_wait *wait_entry,
 960                              unsigned long timeout)
 961 {
 962         int ret;
 963
 964         ret = wait_event_timeout(priv->notif_waitq,
 965                                  wait_entry->triggered || wait_entry->aborted,
 966                                  timeout);
 967
 968         spin_lock_bh(&priv->notif_wait_lock);
 969         list_del(&wait_entry->list);
 970         spin_unlock_bh(&priv->notif_wait_lock);
 971
 972         if (wait_entry->aborted)
 973                 return -EIO;
 974
 975         /* return value is always >= 0 */
 976         if (ret <= 0)
 977                 return -ETIMEDOUT;
 978         return 0;
 979 }
 980
 981 void iwlagn_remove_notification(struct iwl_priv *priv,
 982                                 struct iwl_notification_wait *wait_entry)
 983 {
 984         spin_lock_bh(&priv->notif_wait_lock);
 985         list_del(&wait_entry->list);
 986         spin_unlock_bh(&priv->notif_wait_lock);
 987 }