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