drivers/net/wireless/intel/iwlwifi/dvm/main.c

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2014 Intel Corporation. All rights reserved.
   4  * Copyright(c) 2015 Intel Deutschland GmbH
   5  *
   6  * Portions of this file are derived from the ipw3945 project, as well
   7  * as portions of the ieee80211 subsystem header files.
   8  *
   9  * This program is free software; you can redistribute it and/or modify it
  10  * under the terms of version 2 of the GNU General Public License as
  11  * published by the Free Software Foundation.
  12  *
  13  * This program is distributed in the hope that it will be useful, but WITHOUT
  14  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  15  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  16  * more details.
  17  *
  18  * You should have received a copy of the GNU General Public License along with
  19  * this program; if not, write to the Free Software Foundation, Inc.,
  20  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  21  *
  22  * The full GNU General Public License is included in this distribution in the
  23  * file called LICENSE.
  24  *
  25  * Contact Information:
  26  *  Intel Linux Wireless <linuxwifi@intel.com>
  27  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  28  *
  29  *****************************************************************************/
  30
  31 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  32
  33 #include <linux/kernel.h>
  34 #include <linux/module.h>
  35 #include <linux/init.h>
  36 #include <linux/slab.h>
  37 #include <linux/delay.h>
  38 #include <linux/sched.h>
  39 #include <linux/skbuff.h>
  40 #include <linux/netdevice.h>
  41 #include <linux/etherdevice.h>
  42 #include <linux/if_arp.h>
  43
  44 #include <net/mac80211.h>
  45
  46 #include <asm/div64.h>
  47
  48 #include "iwl-eeprom-read.h"
  49 #include "iwl-eeprom-parse.h"
  50 #include "iwl-io.h"
  51 #include "iwl-trans.h"
  52 #include "iwl-op-mode.h"
  53 #include "iwl-drv.h"
  54 #include "iwl-modparams.h"
  55 #include "iwl-prph.h"
  56
  57 #include "dev.h"
  58 #include "calib.h"
  59 #include "agn.h"
  60
  61
  62 /******************************************************************************
  63  *
  64  * module boiler plate
  65  *
  66  ******************************************************************************/
  67
  68 #define DRV_DESCRIPTION "Intel(R) Wireless WiFi Link AGN driver for Linux"
  69 MODULE_DESCRIPTION(DRV_DESCRIPTION);
  70 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
  71 MODULE_LICENSE("GPL");
  72
  73 /* Please keep this array *SORTED* by hex value.
  74  * Access is done through binary search.
  75  * A warning will be triggered on violation.
  76  */
  77 static const struct iwl_hcmd_names iwl_dvm_cmd_names[] = {
  78         HCMD_NAME(REPLY_ALIVE),
  79         HCMD_NAME(REPLY_ERROR),
  80         HCMD_NAME(REPLY_ECHO),
  81         HCMD_NAME(REPLY_RXON),
  82         HCMD_NAME(REPLY_RXON_ASSOC),
  83         HCMD_NAME(REPLY_QOS_PARAM),
  84         HCMD_NAME(REPLY_RXON_TIMING),
  85         HCMD_NAME(REPLY_ADD_STA),
  86         HCMD_NAME(REPLY_REMOVE_STA),
  87         HCMD_NAME(REPLY_REMOVE_ALL_STA),
  88         HCMD_NAME(REPLY_TX),
  89         HCMD_NAME(REPLY_TXFIFO_FLUSH),
  90         HCMD_NAME(REPLY_WEPKEY),
  91         HCMD_NAME(REPLY_LEDS_CMD),
  92         HCMD_NAME(REPLY_TX_LINK_QUALITY_CMD),
  93         HCMD_NAME(COEX_PRIORITY_TABLE_CMD),
  94         HCMD_NAME(COEX_MEDIUM_NOTIFICATION),
  95         HCMD_NAME(COEX_EVENT_CMD),
  96         HCMD_NAME(TEMPERATURE_NOTIFICATION),
  97         HCMD_NAME(CALIBRATION_CFG_CMD),
  98         HCMD_NAME(CALIBRATION_RES_NOTIFICATION),
  99         HCMD_NAME(CALIBRATION_COMPLETE_NOTIFICATION),
 100         HCMD_NAME(REPLY_QUIET_CMD),
 101         HCMD_NAME(REPLY_CHANNEL_SWITCH),
 102         HCMD_NAME(CHANNEL_SWITCH_NOTIFICATION),
 103         HCMD_NAME(REPLY_SPECTRUM_MEASUREMENT_CMD),
 104         HCMD_NAME(SPECTRUM_MEASURE_NOTIFICATION),
 105         HCMD_NAME(POWER_TABLE_CMD),
 106         HCMD_NAME(PM_SLEEP_NOTIFICATION),
 107         HCMD_NAME(PM_DEBUG_STATISTIC_NOTIFIC),
 108         HCMD_NAME(REPLY_SCAN_CMD),
 109         HCMD_NAME(REPLY_SCAN_ABORT_CMD),
 110         HCMD_NAME(SCAN_START_NOTIFICATION),
 111         HCMD_NAME(SCAN_RESULTS_NOTIFICATION),
 112         HCMD_NAME(SCAN_COMPLETE_NOTIFICATION),
 113         HCMD_NAME(BEACON_NOTIFICATION),
 114         HCMD_NAME(REPLY_TX_BEACON),
 115         HCMD_NAME(WHO_IS_AWAKE_NOTIFICATION),
 116         HCMD_NAME(REPLY_TX_POWER_DBM_CMD),
 117         HCMD_NAME(QUIET_NOTIFICATION),
 118         HCMD_NAME(REPLY_TX_PWR_TABLE_CMD),
 119         HCMD_NAME(REPLY_TX_POWER_DBM_CMD_V1),
 120         HCMD_NAME(TX_ANT_CONFIGURATION_CMD),
 121         HCMD_NAME(MEASURE_ABORT_NOTIFICATION),
 122         HCMD_NAME(REPLY_BT_CONFIG),
 123         HCMD_NAME(REPLY_STATISTICS_CMD),
 124         HCMD_NAME(STATISTICS_NOTIFICATION),
 125         HCMD_NAME(REPLY_CARD_STATE_CMD),
 126         HCMD_NAME(CARD_STATE_NOTIFICATION),
 127         HCMD_NAME(MISSED_BEACONS_NOTIFICATION),
 128         HCMD_NAME(REPLY_CT_KILL_CONFIG_CMD),
 129         HCMD_NAME(SENSITIVITY_CMD),
 130         HCMD_NAME(REPLY_PHY_CALIBRATION_CMD),
 131         HCMD_NAME(REPLY_WIPAN_PARAMS),
 132         HCMD_NAME(REPLY_WIPAN_RXON),
 133         HCMD_NAME(REPLY_WIPAN_RXON_TIMING),
 134         HCMD_NAME(REPLY_WIPAN_RXON_ASSOC),
 135         HCMD_NAME(REPLY_WIPAN_QOS_PARAM),
 136         HCMD_NAME(REPLY_WIPAN_WEPKEY),
 137         HCMD_NAME(REPLY_WIPAN_P2P_CHANNEL_SWITCH),
 138         HCMD_NAME(REPLY_WIPAN_NOA_NOTIFICATION),
 139         HCMD_NAME(REPLY_WIPAN_DEACTIVATION_COMPLETE),
 140         HCMD_NAME(REPLY_RX_PHY_CMD),
 141         HCMD_NAME(REPLY_RX_MPDU_CMD),
 142         HCMD_NAME(REPLY_RX),
 143         HCMD_NAME(REPLY_COMPRESSED_BA),
 144         HCMD_NAME(REPLY_BT_COEX_PRIO_TABLE),
 145         HCMD_NAME(REPLY_BT_COEX_PROT_ENV),
 146         HCMD_NAME(REPLY_BT_COEX_PROFILE_NOTIF),
 147         HCMD_NAME(REPLY_D3_CONFIG),
 148         HCMD_NAME(REPLY_WOWLAN_PATTERNS),
 149         HCMD_NAME(REPLY_WOWLAN_WAKEUP_FILTER),
 150         HCMD_NAME(REPLY_WOWLAN_TSC_RSC_PARAMS),
 151         HCMD_NAME(REPLY_WOWLAN_TKIP_PARAMS),
 152         HCMD_NAME(REPLY_WOWLAN_KEK_KCK_MATERIAL),
 153         HCMD_NAME(REPLY_WOWLAN_GET_STATUS),
 154 };
 155
 156 static const struct iwl_hcmd_arr iwl_dvm_groups[] = {
 157         [0x0] = HCMD_ARR(iwl_dvm_cmd_names),
 158 };
 159
 160 static const struct iwl_op_mode_ops iwl_dvm_ops;
 161
 162 void iwl_update_chain_flags(struct iwl_priv *priv)
 163 {
 164         struct iwl_rxon_context *ctx;
 165
 166         for_each_context(priv, ctx) {
 167                 iwlagn_set_rxon_chain(priv, ctx);
 168                 if (ctx->active.rx_chain != ctx->staging.rx_chain)
 169                         iwlagn_commit_rxon(priv, ctx);
 170         }
 171 }
 172
 173 /* Parse the beacon frame to find the TIM element and set tim_idx & tim_size */
 174 static void iwl_set_beacon_tim(struct iwl_priv *priv,
 175                                struct iwl_tx_beacon_cmd *tx_beacon_cmd,
 176                                u8 *beacon, u32 frame_size)
 177 {
 178         u16 tim_idx;
 179         struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)beacon;
 180
 181         /*
 182          * The index is relative to frame start but we start looking at the
 183          * variable-length part of the beacon.
 184          */
 185         tim_idx = mgmt->u.beacon.variable - beacon;
 186
 187         /* Parse variable-length elements of beacon to find WLAN_EID_TIM */
 188         while ((tim_idx < (frame_size - 2)) &&
 189                         (beacon[tim_idx] != WLAN_EID_TIM))
 190                 tim_idx += beacon[tim_idx+1] + 2;
 191
 192         /* If TIM field was found, set variables */
 193         if ((tim_idx < (frame_size - 1)) && (beacon[tim_idx] == WLAN_EID_TIM)) {
 194                 tx_beacon_cmd->tim_idx = cpu_to_le16(tim_idx);
 195                 tx_beacon_cmd->tim_size = beacon[tim_idx+1];
 196         } else
 197                 IWL_WARN(priv, "Unable to find TIM Element in beacon\n");
 198 }
 199
 200 int iwlagn_send_beacon_cmd(struct iwl_priv *priv)
 201 {
 202         struct iwl_tx_beacon_cmd *tx_beacon_cmd;
 203         struct iwl_host_cmd cmd = {
 204                 .id = REPLY_TX_BEACON,
 205         };
 206         struct ieee80211_tx_info *info;
 207         u32 frame_size;
 208         u32 rate_flags;
 209         u32 rate;
 210
 211         /*
 212          * We have to set up the TX command, the TX Beacon command, and the
 213          * beacon contents.
 214          */
 215
 216         lockdep_assert_held(&priv->mutex);
 217
 218         if (!priv->beacon_ctx) {
 219                 IWL_ERR(priv, "trying to build beacon w/o beacon context!\n");
 220                 return 0;
 221         }
 222
 223         if (WARN_ON(!priv->beacon_skb))
 224                 return -EINVAL;
 225
 226         /* Allocate beacon command */
 227         if (!priv->beacon_cmd)
 228                 priv->beacon_cmd = kzalloc(sizeof(*tx_beacon_cmd), GFP_KERNEL);
 229         tx_beacon_cmd = priv->beacon_cmd;
 230         if (!tx_beacon_cmd)
 231                 return -ENOMEM;
 232
 233         frame_size = priv->beacon_skb->len;
 234
 235         /* Set up TX command fields */
 236         tx_beacon_cmd->tx.len = cpu_to_le16((u16)frame_size);
 237         tx_beacon_cmd->tx.sta_id = priv->beacon_ctx->bcast_sta_id;
 238         tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
 239         tx_beacon_cmd->tx.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK |
 240                 TX_CMD_FLG_TSF_MSK | TX_CMD_FLG_STA_RATE_MSK;
 241
 242         /* Set up TX beacon command fields */
 243         iwl_set_beacon_tim(priv, tx_beacon_cmd, priv->beacon_skb->data,
 244                            frame_size);
 245
 246         /* Set up packet rate and flags */
 247         info = IEEE80211_SKB_CB(priv->beacon_skb);
 248
 249         /*
 250          * Let's set up the rate at least somewhat correctly;
 251          * it will currently not actually be used by the uCode,
 252          * it uses the broadcast station's rate instead.
 253          */
 254         if (info->control.rates[0].idx < 0 ||
 255             info->control.rates[0].flags & IEEE80211_TX_RC_MCS)
 256                 rate = 0;
 257         else
 258                 rate = info->control.rates[0].idx;
 259
 260         priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant,
 261                                               priv->nvm_data->valid_tx_ant);
 262         rate_flags = iwl_ant_idx_to_flags(priv->mgmt_tx_ant);
 263
 264         /* In mac80211, rates for 5 GHz start at 0 */
 265         if (info->band == NL80211_BAND_5GHZ)
 266                 rate += IWL_FIRST_OFDM_RATE;
 267         else if (rate >= IWL_FIRST_CCK_RATE && rate <= IWL_LAST_CCK_RATE)
 268                 rate_flags |= RATE_MCS_CCK_MSK;
 269
 270         tx_beacon_cmd->tx.rate_n_flags =
 271                         iwl_hw_set_rate_n_flags(rate, rate_flags);
 272
 273         /* Submit command */
 274         cmd.len[0] = sizeof(*tx_beacon_cmd);
 275         cmd.data[0] = tx_beacon_cmd;
 276         cmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY;
 277         cmd.len[1] = frame_size;
 278         cmd.data[1] = priv->beacon_skb->data;
 279         cmd.dataflags[1] = IWL_HCMD_DFL_NOCOPY;
 280
 281         return iwl_dvm_send_cmd(priv, &cmd);
 282 }
 283
 284 static void iwl_bg_beacon_update(struct work_struct *work)
 285 {
 286         struct iwl_priv *priv =
 287                 container_of(work, struct iwl_priv, beacon_update);
 288         struct sk_buff *beacon;
 289
 290         mutex_lock(&priv->mutex);
 291         if (!priv->beacon_ctx) {
 292                 IWL_ERR(priv, "updating beacon w/o beacon context!\n");
 293                 goto out;
 294         }
 295
 296         if (priv->beacon_ctx->vif->type != NL80211_IFTYPE_AP) {
 297                 /*
 298                  * The ucode will send beacon notifications even in
 299                  * IBSS mode, but we don't want to process them. But
 300                  * we need to defer the type check to here due to
 301                  * requiring locking around the beacon_ctx access.
 302                  */
 303                 goto out;
 304         }
 305
 306         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
 307         beacon = ieee80211_beacon_get(priv->hw, priv->beacon_ctx->vif);
 308         if (!beacon) {
 309                 IWL_ERR(priv, "update beacon failed -- keeping old\n");
 310                 goto out;
 311         }
 312
 313         /* new beacon skb is allocated every time; dispose previous.*/
 314         dev_kfree_skb(priv->beacon_skb);
 315
 316         priv->beacon_skb = beacon;
 317
 318         iwlagn_send_beacon_cmd(priv);
 319  out:
 320         mutex_unlock(&priv->mutex);
 321 }
 322
 323 static void iwl_bg_bt_runtime_config(struct work_struct *work)
 324 {
 325         struct iwl_priv *priv =
 326                 container_of(work, struct iwl_priv, bt_runtime_config);
 327
 328         mutex_lock(&priv->mutex);
 329         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 330                 goto out;
 331
 332         /* dont send host command if rf-kill is on */
 333         if (!iwl_is_ready_rf(priv))
 334                 goto out;
 335
 336         iwlagn_send_advance_bt_config(priv);
 337 out:
 338         mutex_unlock(&priv->mutex);
 339 }
 340
 341 static void iwl_bg_bt_full_concurrency(struct work_struct *work)
 342 {
 343         struct iwl_priv *priv =
 344                 container_of(work, struct iwl_priv, bt_full_concurrency);
 345         struct iwl_rxon_context *ctx;
 346
 347         mutex_lock(&priv->mutex);
 348
 349         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 350                 goto out;
 351
 352         /* dont send host command if rf-kill is on */
 353         if (!iwl_is_ready_rf(priv))
 354                 goto out;
 355
 356         IWL_DEBUG_INFO(priv, "BT coex in %s mode\n",
 357                        priv->bt_full_concurrent ?
 358                        "full concurrency" : "3-wire");
 359
 360         /*
 361          * LQ & RXON updated cmds must be sent before BT Config cmd
 362          * to avoid 3-wire collisions
 363          */
 364         for_each_context(priv, ctx) {
 365                 iwlagn_set_rxon_chain(priv, ctx);
 366                 iwlagn_commit_rxon(priv, ctx);
 367         }
 368
 369         iwlagn_send_advance_bt_config(priv);
 370 out:
 371         mutex_unlock(&priv->mutex);
 372 }
 373
 374 int iwl_send_statistics_request(struct iwl_priv *priv, u8 flags, bool clear)
 375 {
 376         struct iwl_statistics_cmd statistics_cmd = {
 377                 .configuration_flags =
 378                         clear ? IWL_STATS_CONF_CLEAR_STATS : 0,
 379         };
 380
 381         if (flags & CMD_ASYNC)
 382                 return iwl_dvm_send_cmd_pdu(priv, REPLY_STATISTICS_CMD,
 383                                         CMD_ASYNC,
 384                                         sizeof(struct iwl_statistics_cmd),
 385                                         &statistics_cmd);
 386         else
 387                 return iwl_dvm_send_cmd_pdu(priv, REPLY_STATISTICS_CMD, 0,
 388                                         sizeof(struct iwl_statistics_cmd),
 389                                         &statistics_cmd);
 390 }
 391
 392 /**
 393  * iwl_bg_statistics_periodic - Timer callback to queue statistics
 394  *
 395  * This callback is provided in order to send a statistics request.
 396  *
 397  * This timer function is continually reset to execute within
 398  * REG_RECALIB_PERIOD seconds since the last STATISTICS_NOTIFICATION
 399  * was received.  We need to ensure we receive the statistics in order
 400  * to update the temperature used for calibrating the TXPOWER.
 401  */
 402 static void iwl_bg_statistics_periodic(unsigned long data)
 403 {
 404         struct iwl_priv *priv = (struct iwl_priv *)data;
 405
 406         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 407                 return;
 408
 409         /* dont send host command if rf-kill is on */
 410         if (!iwl_is_ready_rf(priv))
 411                 return;
 412
 413         iwl_send_statistics_request(priv, CMD_ASYNC, false);
 414 }
 415
 416
 417 static void iwl_print_cont_event_trace(struct iwl_priv *priv, u32 base,
 418                                         u32 start_idx, u32 num_events,
 419                                         u32 capacity, u32 mode)
 420 {
 421         u32 i;
 422         u32 ptr;        /* SRAM byte address of log data */
 423         u32 ev, time, data; /* event log data */
 424         unsigned long reg_flags;
 425
 426         if (mode == 0)
 427                 ptr = base + (4 * sizeof(u32)) + (start_idx * 2 * sizeof(u32));
 428         else
 429                 ptr = base + (4 * sizeof(u32)) + (start_idx * 3 * sizeof(u32));
 430
 431         /* Make sure device is powered up for SRAM reads */
 432         if (!iwl_trans_grab_nic_access(priv->trans, &reg_flags))
 433                 return;
 434
 435         /* Set starting address; reads will auto-increment */
 436         iwl_write32(priv->trans, HBUS_TARG_MEM_RADDR, ptr);
 437
 438         /*
 439          * Refuse to read more than would have fit into the log from
 440          * the current start_idx. This used to happen due to the race
 441          * described below, but now WARN because the code below should
 442          * prevent it from happening here.
 443          */
 444         if (WARN_ON(num_events > capacity - start_idx))
 445                 num_events = capacity - start_idx;
 446
 447         /*
 448          * "time" is actually "data" for mode 0 (no timestamp).
 449          * place event id # at far right for easier visual parsing.
 450          */
 451         for (i = 0; i < num_events; i++) {
 452                 ev = iwl_read32(priv->trans, HBUS_TARG_MEM_RDAT);
 453                 time = iwl_read32(priv->trans, HBUS_TARG_MEM_RDAT);
 454                 if (mode == 0) {
 455                         trace_iwlwifi_dev_ucode_cont_event(
 456                                         priv->trans->dev, 0, time, ev);
 457                 } else {
 458                         data = iwl_read32(priv->trans, HBUS_TARG_MEM_RDAT);
 459                         trace_iwlwifi_dev_ucode_cont_event(
 460                                         priv->trans->dev, time, data, ev);
 461                 }
 462         }
 463         /* Allow device to power down */
 464         iwl_trans_release_nic_access(priv->trans, &reg_flags);
 465 }
 466
 467 static void iwl_continuous_event_trace(struct iwl_priv *priv)
 468 {
 469         u32 capacity;   /* event log capacity in # entries */
 470         struct {
 471                 u32 capacity;
 472                 u32 mode;
 473                 u32 wrap_counter;
 474                 u32 write_counter;
 475         } __packed read;
 476         u32 base;       /* SRAM byte address of event log header */
 477         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
 478         u32 num_wraps;  /* # times uCode wrapped to top of log */
 479         u32 next_entry; /* index of next entry to be written by uCode */
 480
 481         base = priv->device_pointers.log_event_table;
 482         if (iwlagn_hw_valid_rtc_data_addr(base)) {
 483                 iwl_trans_read_mem_bytes(priv->trans, base,
 484                                          &read, sizeof(read));
 485                 capacity = read.capacity;
 486                 mode = read.mode;
 487                 num_wraps = read.wrap_counter;
 488                 next_entry = read.write_counter;
 489         } else
 490                 return;
 491
 492         /*
 493          * Unfortunately, the uCode doesn't use temporary variables.
 494          * Therefore, it can happen that we read next_entry == capacity,
 495          * which really means next_entry == 0.
 496          */
 497         if (unlikely(next_entry == capacity))
 498                 next_entry = 0;
 499         /*
 500          * Additionally, the uCode increases the write pointer before
 501          * the wraps counter, so if the write pointer is smaller than
 502          * the old write pointer (wrap occurred) but we read that no
 503          * wrap occurred, we actually read between the next_entry and
 504          * num_wraps update (this does happen in practice!!) -- take
 505          * that into account by increasing num_wraps.
 506          */
 507         if (unlikely(next_entry < priv->event_log.next_entry &&
 508                      num_wraps == priv->event_log.num_wraps))
 509                 num_wraps++;
 510
 511         if (num_wraps == priv->event_log.num_wraps) {
 512                 iwl_print_cont_event_trace(
 513                         priv, base, priv->event_log.next_entry,
 514                         next_entry - priv->event_log.next_entry,
 515                         capacity, mode);
 516
 517                 priv->event_log.non_wraps_count++;
 518         } else {
 519                 if (num_wraps - priv->event_log.num_wraps > 1)
 520                         priv->event_log.wraps_more_count++;
 521                 else
 522                         priv->event_log.wraps_once_count++;
 523
 524                 trace_iwlwifi_dev_ucode_wrap_event(priv->trans->dev,
 525                                 num_wraps - priv->event_log.num_wraps,
 526                                 next_entry, priv->event_log.next_entry);
 527
 528                 if (next_entry < priv->event_log.next_entry) {
 529                         iwl_print_cont_event_trace(
 530                                 priv, base, priv->event_log.next_entry,
 531                                 capacity - priv->event_log.next_entry,
 532                                 capacity, mode);
 533
 534                         iwl_print_cont_event_trace(
 535                                 priv, base, 0, next_entry, capacity, mode);
 536                 } else {
 537                         iwl_print_cont_event_trace(
 538                                 priv, base, next_entry,
 539                                 capacity - next_entry,
 540                                 capacity, mode);
 541
 542                         iwl_print_cont_event_trace(
 543                                 priv, base, 0, next_entry, capacity, mode);
 544                 }
 545         }
 546
 547         priv->event_log.num_wraps = num_wraps;
 548         priv->event_log.next_entry = next_entry;
 549 }
 550
 551 /**
 552  * iwl_bg_ucode_trace - Timer callback to log ucode event
 553  *
 554  * The timer is continually set to execute every
 555  * UCODE_TRACE_PERIOD milliseconds after the last timer expired
 556  * this function is to perform continuous uCode event logging operation
 557  * if enabled
 558  */
 559 static void iwl_bg_ucode_trace(unsigned long data)
 560 {
 561         struct iwl_priv *priv = (struct iwl_priv *)data;
 562
 563         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 564                 return;
 565
 566         if (priv->event_log.ucode_trace) {
 567                 iwl_continuous_event_trace(priv);
 568                 /* Reschedule the timer to occur in UCODE_TRACE_PERIOD */
 569                 mod_timer(&priv->ucode_trace,
 570                          jiffies + msecs_to_jiffies(UCODE_TRACE_PERIOD));
 571         }
 572 }
 573
 574 static void iwl_bg_tx_flush(struct work_struct *work)
 575 {
 576         struct iwl_priv *priv =
 577                 container_of(work, struct iwl_priv, tx_flush);
 578
 579         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 580                 return;
 581
 582         /* do nothing if rf-kill is on */
 583         if (!iwl_is_ready_rf(priv))
 584                 return;
 585
 586         IWL_DEBUG_INFO(priv, "device request: flush all tx frames\n");
 587         iwlagn_dev_txfifo_flush(priv);
 588 }
 589
 590 /*
 591  * queue/FIFO/AC mapping definitions
 592  */
 593
 594 static const u8 iwlagn_bss_ac_to_fifo[] = {
 595         IWL_TX_FIFO_VO,
 596         IWL_TX_FIFO_VI,
 597         IWL_TX_FIFO_BE,
 598         IWL_TX_FIFO_BK,
 599 };
 600
 601 static const u8 iwlagn_bss_ac_to_queue[] = {
 602         0, 1, 2, 3,
 603 };
 604
 605 static const u8 iwlagn_pan_ac_to_fifo[] = {
 606         IWL_TX_FIFO_VO_IPAN,
 607         IWL_TX_FIFO_VI_IPAN,
 608         IWL_TX_FIFO_BE_IPAN,
 609         IWL_TX_FIFO_BK_IPAN,
 610 };
 611
 612 static const u8 iwlagn_pan_ac_to_queue[] = {
 613         7, 6, 5, 4,
 614 };
 615
 616 static void iwl_init_context(struct iwl_priv *priv, u32 ucode_flags)
 617 {
 618         int i;
 619
 620         /*
 621          * The default context is always valid,
 622          * the PAN context depends on uCode.
 623          */
 624         priv->valid_contexts = BIT(IWL_RXON_CTX_BSS);
 625         if (ucode_flags & IWL_UCODE_TLV_FLAGS_PAN)
 626                 priv->valid_contexts |= BIT(IWL_RXON_CTX_PAN);
 627
 628         for (i = 0; i < NUM_IWL_RXON_CTX; i++)
 629                 priv->contexts[i].ctxid = i;
 630
 631         priv->contexts[IWL_RXON_CTX_BSS].always_active = true;
 632         priv->contexts[IWL_RXON_CTX_BSS].is_active = true;
 633         priv->contexts[IWL_RXON_CTX_BSS].rxon_cmd = REPLY_RXON;
 634         priv->contexts[IWL_RXON_CTX_BSS].rxon_timing_cmd = REPLY_RXON_TIMING;
 635         priv->contexts[IWL_RXON_CTX_BSS].rxon_assoc_cmd = REPLY_RXON_ASSOC;
 636         priv->contexts[IWL_RXON_CTX_BSS].qos_cmd = REPLY_QOS_PARAM;
 637         priv->contexts[IWL_RXON_CTX_BSS].ap_sta_id = IWL_AP_ID;
 638         priv->contexts[IWL_RXON_CTX_BSS].wep_key_cmd = REPLY_WEPKEY;
 639         priv->contexts[IWL_RXON_CTX_BSS].bcast_sta_id = IWLAGN_BROADCAST_ID;
 640         priv->contexts[IWL_RXON_CTX_BSS].exclusive_interface_modes =
 641                 BIT(NL80211_IFTYPE_ADHOC) | BIT(NL80211_IFTYPE_MONITOR);
 642         priv->contexts[IWL_RXON_CTX_BSS].interface_modes =
 643                 BIT(NL80211_IFTYPE_STATION);
 644         priv->contexts[IWL_RXON_CTX_BSS].ap_devtype = RXON_DEV_TYPE_AP;
 645         priv->contexts[IWL_RXON_CTX_BSS].ibss_devtype = RXON_DEV_TYPE_IBSS;
 646         priv->contexts[IWL_RXON_CTX_BSS].station_devtype = RXON_DEV_TYPE_ESS;
 647         priv->contexts[IWL_RXON_CTX_BSS].unused_devtype = RXON_DEV_TYPE_ESS;
 648         memcpy(priv->contexts[IWL_RXON_CTX_BSS].ac_to_queue,
 649                iwlagn_bss_ac_to_queue, sizeof(iwlagn_bss_ac_to_queue));
 650         memcpy(priv->contexts[IWL_RXON_CTX_BSS].ac_to_fifo,
 651                iwlagn_bss_ac_to_fifo, sizeof(iwlagn_bss_ac_to_fifo));
 652
 653         priv->contexts[IWL_RXON_CTX_PAN].rxon_cmd = REPLY_WIPAN_RXON;
 654         priv->contexts[IWL_RXON_CTX_PAN].rxon_timing_cmd =
 655                 REPLY_WIPAN_RXON_TIMING;
 656         priv->contexts[IWL_RXON_CTX_PAN].rxon_assoc_cmd =
 657                 REPLY_WIPAN_RXON_ASSOC;
 658         priv->contexts[IWL_RXON_CTX_PAN].qos_cmd = REPLY_WIPAN_QOS_PARAM;
 659         priv->contexts[IWL_RXON_CTX_PAN].ap_sta_id = IWL_AP_ID_PAN;
 660         priv->contexts[IWL_RXON_CTX_PAN].wep_key_cmd = REPLY_WIPAN_WEPKEY;
 661         priv->contexts[IWL_RXON_CTX_PAN].bcast_sta_id = IWLAGN_PAN_BCAST_ID;
 662         priv->contexts[IWL_RXON_CTX_PAN].station_flags = STA_FLG_PAN_STATION;
 663         priv->contexts[IWL_RXON_CTX_PAN].interface_modes =
 664                 BIT(NL80211_IFTYPE_STATION) | BIT(NL80211_IFTYPE_AP);
 665
 666         priv->contexts[IWL_RXON_CTX_PAN].ap_devtype = RXON_DEV_TYPE_CP;
 667         priv->contexts[IWL_RXON_CTX_PAN].station_devtype = RXON_DEV_TYPE_2STA;
 668         priv->contexts[IWL_RXON_CTX_PAN].unused_devtype = RXON_DEV_TYPE_P2P;
 669         memcpy(priv->contexts[IWL_RXON_CTX_PAN].ac_to_queue,
 670                iwlagn_pan_ac_to_queue, sizeof(iwlagn_pan_ac_to_queue));
 671         memcpy(priv->contexts[IWL_RXON_CTX_PAN].ac_to_fifo,
 672                iwlagn_pan_ac_to_fifo, sizeof(iwlagn_pan_ac_to_fifo));
 673         priv->contexts[IWL_RXON_CTX_PAN].mcast_queue = IWL_IPAN_MCAST_QUEUE;
 674
 675         BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
 676 }
 677
 678 static void iwl_rf_kill_ct_config(struct iwl_priv *priv)
 679 {
 680         struct iwl_ct_kill_config cmd;
 681         struct iwl_ct_kill_throttling_config adv_cmd;
 682         int ret = 0;
 683
 684         iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_CLR,
 685                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
 686
 687         priv->thermal_throttle.ct_kill_toggle = false;
 688
 689         if (priv->lib->support_ct_kill_exit) {
 690                 adv_cmd.critical_temperature_enter =
 691                         cpu_to_le32(priv->hw_params.ct_kill_threshold);
 692                 adv_cmd.critical_temperature_exit =
 693                         cpu_to_le32(priv->hw_params.ct_kill_exit_threshold);
 694
 695                 ret = iwl_dvm_send_cmd_pdu(priv,
 696                                        REPLY_CT_KILL_CONFIG_CMD,
 697                                        0, sizeof(adv_cmd), &adv_cmd);
 698                 if (ret)
 699                         IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
 700                 else
 701                         IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
 702                                 "succeeded, critical temperature enter is %d,"
 703                                 "exit is %d\n",
 704                                 priv->hw_params.ct_kill_threshold,
 705                                 priv->hw_params.ct_kill_exit_threshold);
 706         } else {
 707                 cmd.critical_temperature_R =
 708                         cpu_to_le32(priv->hw_params.ct_kill_threshold);
 709
 710                 ret = iwl_dvm_send_cmd_pdu(priv,
 711                                        REPLY_CT_KILL_CONFIG_CMD,
 712                                        0, sizeof(cmd), &cmd);
 713                 if (ret)
 714                         IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
 715                 else
 716                         IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
 717                                 "succeeded, "
 718                                 "critical temperature is %d\n",
 719                                 priv->hw_params.ct_kill_threshold);
 720         }
 721 }
 722
 723 static int iwlagn_send_calib_cfg_rt(struct iwl_priv *priv, u32 cfg)
 724 {
 725         struct iwl_calib_cfg_cmd calib_cfg_cmd;
 726         struct iwl_host_cmd cmd = {
 727                 .id = CALIBRATION_CFG_CMD,
 728                 .len = { sizeof(struct iwl_calib_cfg_cmd), },
 729                 .data = { &calib_cfg_cmd, },
 730         };
 731
 732         memset(&calib_cfg_cmd, 0, sizeof(calib_cfg_cmd));
 733         calib_cfg_cmd.ucd_calib_cfg.once.is_enable = IWL_CALIB_RT_CFG_ALL;
 734         calib_cfg_cmd.ucd_calib_cfg.once.start = cpu_to_le32(cfg);
 735
 736         return iwl_dvm_send_cmd(priv, &cmd);
 737 }
 738
 739
 740 static int iwlagn_send_tx_ant_config(struct iwl_priv *priv, u8 valid_tx_ant)
 741 {
 742         struct iwl_tx_ant_config_cmd tx_ant_cmd = {
 743           .valid = cpu_to_le32(valid_tx_ant),
 744         };
 745
 746         if (IWL_UCODE_API(priv->fw->ucode_ver) > 1) {
 747                 IWL_DEBUG_HC(priv, "select valid tx ant: %u\n", valid_tx_ant);
 748                 return iwl_dvm_send_cmd_pdu(priv, TX_ANT_CONFIGURATION_CMD, 0,
 749                                         sizeof(struct iwl_tx_ant_config_cmd),
 750                                         &tx_ant_cmd);
 751         } else {
 752                 IWL_DEBUG_HC(priv, "TX_ANT_CONFIGURATION_CMD not supported\n");
 753                 return -EOPNOTSUPP;
 754         }
 755 }
 756
 757 static void iwl_send_bt_config(struct iwl_priv *priv)
 758 {
 759         struct iwl_bt_cmd bt_cmd = {
 760                 .lead_time = BT_LEAD_TIME_DEF,
 761                 .max_kill = BT_MAX_KILL_DEF,
 762                 .kill_ack_mask = 0,
 763                 .kill_cts_mask = 0,
 764         };
 765
 766         if (!iwlwifi_mod_params.bt_coex_active)
 767                 bt_cmd.flags = BT_COEX_DISABLE;
 768         else
 769                 bt_cmd.flags = BT_COEX_ENABLE;
 770
 771         priv->bt_enable_flag = bt_cmd.flags;
 772         IWL_DEBUG_INFO(priv, "BT coex %s\n",
 773                 (bt_cmd.flags == BT_COEX_DISABLE) ? "disable" : "active");
 774
 775         if (iwl_dvm_send_cmd_pdu(priv, REPLY_BT_CONFIG,
 776                              0, sizeof(struct iwl_bt_cmd), &bt_cmd))
 777                 IWL_ERR(priv, "failed to send BT Coex Config\n");
 778 }
 779
 780 /**
 781  * iwl_alive_start - called after REPLY_ALIVE notification received
 782  *                   from protocol/runtime uCode (initialization uCode's
 783  *                   Alive gets handled by iwl_init_alive_start()).
 784  */
 785 int iwl_alive_start(struct iwl_priv *priv)
 786 {
 787         int ret = 0;
 788         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 789
 790         IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
 791
 792         /* After the ALIVE response, we can send host commands to the uCode */
 793         set_bit(STATUS_ALIVE, &priv->status);
 794
 795         if (iwl_is_rfkill(priv))
 796                 return -ERFKILL;
 797
 798         if (priv->event_log.ucode_trace) {
 799                 /* start collecting data now */
 800                 mod_timer(&priv->ucode_trace, jiffies);
 801         }
 802
 803         /* download priority table before any calibration request */
 804         if (priv->lib->bt_params &&
 805             priv->lib->bt_params->advanced_bt_coexist) {
 806                 /* Configure Bluetooth device coexistence support */
 807                 if (priv->lib->bt_params->bt_sco_disable)
 808                         priv->bt_enable_pspoll = false;
 809                 else
 810                         priv->bt_enable_pspoll = true;
 811
 812                 priv->bt_valid = IWLAGN_BT_ALL_VALID_MSK;
 813                 priv->kill_ack_mask = IWLAGN_BT_KILL_ACK_MASK_DEFAULT;
 814                 priv->kill_cts_mask = IWLAGN_BT_KILL_CTS_MASK_DEFAULT;
 815                 iwlagn_send_advance_bt_config(priv);
 816                 priv->bt_valid = IWLAGN_BT_VALID_ENABLE_FLAGS;
 817                 priv->cur_rssi_ctx = NULL;
 818
 819                 iwl_send_prio_tbl(priv);
 820
 821                 /* FIXME: w/a to force change uCode BT state machine */
 822                 ret = iwl_send_bt_env(priv, IWL_BT_COEX_ENV_OPEN,
 823                                          BT_COEX_PRIO_TBL_EVT_INIT_CALIB2);
 824                 if (ret)
 825                         return ret;
 826                 ret = iwl_send_bt_env(priv, IWL_BT_COEX_ENV_CLOSE,
 827                                          BT_COEX_PRIO_TBL_EVT_INIT_CALIB2);
 828                 if (ret)
 829                         return ret;
 830         } else if (priv->lib->bt_params) {
 831                 /*
 832                  * default is 2-wire BT coexexistence support
 833                  */
 834                 iwl_send_bt_config(priv);
 835         }
 836
 837         /*
 838          * Perform runtime calibrations, including DC calibration.
 839          */
 840         iwlagn_send_calib_cfg_rt(priv, IWL_CALIB_CFG_DC_IDX);
 841
 842         ieee80211_wake_queues(priv->hw);
 843
 844         /* Configure Tx antenna selection based on H/W config */
 845         iwlagn_send_tx_ant_config(priv, priv->nvm_data->valid_tx_ant);
 846
 847         if (iwl_is_associated_ctx(ctx) && !priv->wowlan) {
 848                 struct iwl_rxon_cmd *active_rxon =
 849                                 (struct iwl_rxon_cmd *)&ctx->active;
 850                 /* apply any changes in staging */
 851                 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
 852                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
 853         } else {
 854                 struct iwl_rxon_context *tmp;
 855                 /* Initialize our rx_config data */
 856                 for_each_context(priv, tmp)
 857                         iwl_connection_init_rx_config(priv, tmp);
 858
 859                 iwlagn_set_rxon_chain(priv, ctx);
 860         }
 861
 862         if (!priv->wowlan) {
 863                 /* WoWLAN ucode will not reply in the same way, skip it */
 864                 iwl_reset_run_time_calib(priv);
 865         }
 866
 867         set_bit(STATUS_READY, &priv->status);
 868
 869         /* Configure the adapter for unassociated operation */
 870         ret = iwlagn_commit_rxon(priv, ctx);
 871         if (ret)
 872                 return ret;
 873
 874         /* At this point, the NIC is initialized and operational */
 875         iwl_rf_kill_ct_config(priv);
 876
 877         IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
 878
 879         return iwl_power_update_mode(priv, true);
 880 }
 881
 882 /**
 883  * iwl_clear_driver_stations - clear knowledge of all stations from driver
 884  * @priv: iwl priv struct
 885  *
 886  * This is called during iwl_down() to make sure that in the case
 887  * we're coming there from a hardware restart mac80211 will be
 888  * able to reconfigure stations -- if we're getting there in the
 889  * normal down flow then the stations will already be cleared.
 890  */
 891 static void iwl_clear_driver_stations(struct iwl_priv *priv)
 892 {
 893         struct iwl_rxon_context *ctx;
 894
 895         spin_lock_bh(&priv->sta_lock);
 896         memset(priv->stations, 0, sizeof(priv->stations));
 897         priv->num_stations = 0;
 898
 899         priv->ucode_key_table = 0;
 900
 901         for_each_context(priv, ctx) {
 902                 /*
 903                  * Remove all key information that is not stored as part
 904                  * of station information since mac80211 may not have had
 905                  * a chance to remove all the keys. When device is
 906                  * reconfigured by mac80211 after an error all keys will
 907                  * be reconfigured.
 908                  */
 909                 memset(ctx->wep_keys, 0, sizeof(ctx->wep_keys));
 910                 ctx->key_mapping_keys = 0;
 911         }
 912
 913         spin_unlock_bh(&priv->sta_lock);
 914 }
 915
 916 void iwl_down(struct iwl_priv *priv)
 917 {
 918         int exit_pending;
 919
 920         IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
 921
 922         lockdep_assert_held(&priv->mutex);
 923
 924         iwl_scan_cancel_timeout(priv, 200);
 925
 926         exit_pending =
 927                 test_and_set_bit(STATUS_EXIT_PENDING, &priv->status);
 928
 929         iwl_clear_ucode_stations(priv, NULL);
 930         iwl_dealloc_bcast_stations(priv);
 931         iwl_clear_driver_stations(priv);
 932
 933         /* reset BT coex data */
 934         priv->bt_status = 0;
 935         priv->cur_rssi_ctx = NULL;
 936         priv->bt_is_sco = 0;
 937         if (priv->lib->bt_params)
 938                 priv->bt_traffic_load =
 939                          priv->lib->bt_params->bt_init_traffic_load;
 940         else
 941                 priv->bt_traffic_load = 0;
 942         priv->bt_full_concurrent = false;
 943         priv->bt_ci_compliance = 0;
 944
 945         /* Wipe out the EXIT_PENDING status bit if we are not actually
 946          * exiting the module */
 947         if (!exit_pending)
 948                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
 949
 950         if (priv->mac80211_registered)
 951                 ieee80211_stop_queues(priv->hw);
 952
 953         priv->ucode_loaded = false;
 954         iwl_trans_stop_device(priv->trans);
 955
 956         /* Set num_aux_in_flight must be done after the transport is stopped */
 957         atomic_set(&priv->num_aux_in_flight, 0);
 958
 959         /* Clear out all status bits but a few that are stable across reset */
 960         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
 961                                 STATUS_RF_KILL_HW |
 962                         test_bit(STATUS_FW_ERROR, &priv->status) <<
 963                                 STATUS_FW_ERROR |
 964                         test_bit(STATUS_EXIT_PENDING, &priv->status) <<
 965                                 STATUS_EXIT_PENDING;
 966
 967         dev_kfree_skb(priv->beacon_skb);
 968         priv->beacon_skb = NULL;
 969 }
 970
 971 /*****************************************************************************
 972  *
 973  * Workqueue callbacks
 974  *
 975  *****************************************************************************/
 976
 977 static void iwl_bg_run_time_calib_work(struct work_struct *work)
 978 {
 979         struct iwl_priv *priv = container_of(work, struct iwl_priv,
 980                         run_time_calib_work);
 981
 982         mutex_lock(&priv->mutex);
 983
 984         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
 985             test_bit(STATUS_SCANNING, &priv->status)) {
 986                 mutex_unlock(&priv->mutex);
 987                 return;
 988         }
 989
 990         if (priv->start_calib) {
 991                 iwl_chain_noise_calibration(priv);
 992                 iwl_sensitivity_calibration(priv);
 993         }
 994
 995         mutex_unlock(&priv->mutex);
 996 }
 997
 998 void iwlagn_prepare_restart(struct iwl_priv *priv)
 999 {
1000         bool bt_full_concurrent;
1001         u8 bt_ci_compliance;
1002         u8 bt_load;
1003         u8 bt_status;
1004         bool bt_is_sco;
1005         int i;
1006
1007         lockdep_assert_held(&priv->mutex);
1008
1009         priv->is_open = 0;
1010
1011         /*
1012          * __iwl_down() will clear the BT status variables,
1013          * which is correct, but when we restart we really
1014          * want to keep them so restore them afterwards.
1015          *
1016          * The restart process will later pick them up and
1017          * re-configure the hw when we reconfigure the BT
1018          * command.
1019          */
1020         bt_full_concurrent = priv->bt_full_concurrent;
1021         bt_ci_compliance = priv->bt_ci_compliance;
1022         bt_load = priv->bt_traffic_load;
1023         bt_status = priv->bt_status;
1024         bt_is_sco = priv->bt_is_sco;
1025
1026         iwl_down(priv);
1027
1028         priv->bt_full_concurrent = bt_full_concurrent;
1029         priv->bt_ci_compliance = bt_ci_compliance;
1030         priv->bt_traffic_load = bt_load;
1031         priv->bt_status = bt_status;
1032         priv->bt_is_sco = bt_is_sco;
1033
1034         /* reset aggregation queues */
1035         for (i = IWLAGN_FIRST_AMPDU_QUEUE; i < IWL_MAX_HW_QUEUES; i++)
1036                 priv->queue_to_mac80211[i] = IWL_INVALID_MAC80211_QUEUE;
1037         /* and stop counts */
1038         for (i = 0; i < IWL_MAX_HW_QUEUES; i++)
1039                 atomic_set(&priv->queue_stop_count[i], 0);
1040
1041         memset(priv->agg_q_alloc, 0, sizeof(priv->agg_q_alloc));
1042 }
1043
1044 static void iwl_bg_restart(struct work_struct *data)
1045 {
1046         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
1047
1048         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1049                 return;
1050
1051         if (test_and_clear_bit(STATUS_FW_ERROR, &priv->status)) {
1052                 mutex_lock(&priv->mutex);
1053                 iwlagn_prepare_restart(priv);
1054                 mutex_unlock(&priv->mutex);
1055                 iwl_cancel_deferred_work(priv);
1056                 if (priv->mac80211_registered)
1057                         ieee80211_restart_hw(priv->hw);
1058                 else
1059                         IWL_ERR(priv,
1060                                 "Cannot request restart before registrating with mac80211\n");
1061         } else {
1062                 WARN_ON(1);
1063         }
1064 }
1065
1066 /*****************************************************************************
1067  *
1068  * driver setup and teardown
1069  *
1070  *****************************************************************************/
1071
1072 static void iwl_setup_deferred_work(struct iwl_priv *priv)
1073 {
1074         priv->workqueue = alloc_ordered_workqueue(DRV_NAME, 0);
1075
1076         INIT_WORK(&priv->restart, iwl_bg_restart);
1077         INIT_WORK(&priv->beacon_update, iwl_bg_beacon_update);
1078         INIT_WORK(&priv->run_time_calib_work, iwl_bg_run_time_calib_work);
1079         INIT_WORK(&priv->tx_flush, iwl_bg_tx_flush);
1080         INIT_WORK(&priv->bt_full_concurrency, iwl_bg_bt_full_concurrency);
1081         INIT_WORK(&priv->bt_runtime_config, iwl_bg_bt_runtime_config);
1082
1083         iwl_setup_scan_deferred_work(priv);
1084
1085         if (priv->lib->bt_params)
1086                 iwlagn_bt_setup_deferred_work(priv);
1087
1088         setup_timer(&priv->statistics_periodic, iwl_bg_statistics_periodic,
1089                     (unsigned long)priv);
1090
1091         setup_timer(&priv->ucode_trace, iwl_bg_ucode_trace,
1092                     (unsigned long)priv);
1093 }
1094
1095 void iwl_cancel_deferred_work(struct iwl_priv *priv)
1096 {
1097         if (priv->lib->bt_params)
1098                 iwlagn_bt_cancel_deferred_work(priv);
1099
1100         cancel_work_sync(&priv->run_time_calib_work);
1101         cancel_work_sync(&priv->beacon_update);
1102
1103         iwl_cancel_scan_deferred_work(priv);
1104
1105         cancel_work_sync(&priv->bt_full_concurrency);
1106         cancel_work_sync(&priv->bt_runtime_config);
1107
1108         del_timer_sync(&priv->statistics_periodic);
1109         del_timer_sync(&priv->ucode_trace);
1110 }
1111
1112 static int iwl_init_drv(struct iwl_priv *priv)
1113 {
1114         spin_lock_init(&priv->sta_lock);
1115
1116         mutex_init(&priv->mutex);
1117
1118         INIT_LIST_HEAD(&priv->calib_results);
1119
1120         priv->band = NL80211_BAND_2GHZ;
1121
1122         priv->plcp_delta_threshold = priv->lib->plcp_delta_threshold;
1123
1124         priv->iw_mode = NL80211_IFTYPE_STATION;
1125         priv->current_ht_config.smps = IEEE80211_SMPS_STATIC;
1126         priv->missed_beacon_threshold = IWL_MISSED_BEACON_THRESHOLD_DEF;
1127         priv->agg_tids_count = 0;
1128
1129         priv->rx_statistics_jiffies = jiffies;
1130
1131         /* Choose which receivers/antennas to use */
1132         iwlagn_set_rxon_chain(priv, &priv->contexts[IWL_RXON_CTX_BSS]);
1133
1134         iwl_init_scan_params(priv);
1135
1136         /* init bt coex */
1137         if (priv->lib->bt_params &&
1138             priv->lib->bt_params->advanced_bt_coexist) {
1139                 priv->kill_ack_mask = IWLAGN_BT_KILL_ACK_MASK_DEFAULT;
1140                 priv->kill_cts_mask = IWLAGN_BT_KILL_CTS_MASK_DEFAULT;
1141                 priv->bt_valid = IWLAGN_BT_ALL_VALID_MSK;
1142                 priv->bt_on_thresh = BT_ON_THRESHOLD_DEF;
1143                 priv->bt_duration = BT_DURATION_LIMIT_DEF;
1144                 priv->dynamic_frag_thresh = BT_FRAG_THRESHOLD_DEF;
1145         }
1146
1147         return 0;
1148 }
1149
1150 static void iwl_uninit_drv(struct iwl_priv *priv)
1151 {
1152         kfree(priv->scan_cmd);
1153         kfree(priv->beacon_cmd);
1154         kfree(rcu_dereference_raw(priv->noa_data));
1155         iwl_calib_free_results(priv);
1156 #ifdef CONFIG_IWLWIFI_DEBUGFS
1157         kfree(priv->wowlan_sram);
1158 #endif
1159 }
1160
1161 static void iwl_set_hw_params(struct iwl_priv *priv)
1162 {
1163         if (priv->cfg->ht_params)
1164                 priv->hw_params.use_rts_for_aggregation =
1165                         priv->cfg->ht_params->use_rts_for_aggregation;
1166
1167         /* Device-specific setup */
1168         priv->lib->set_hw_params(priv);
1169 }
1170
1171
1172
1173 /* show what optional capabilities we have */
1174 static void iwl_option_config(struct iwl_priv *priv)
1175 {
1176 #ifdef CONFIG_IWLWIFI_DEBUG
1177         IWL_INFO(priv, "CONFIG_IWLWIFI_DEBUG enabled\n");
1178 #else
1179         IWL_INFO(priv, "CONFIG_IWLWIFI_DEBUG disabled\n");
1180 #endif
1181
1182 #ifdef CONFIG_IWLWIFI_DEBUGFS
1183         IWL_INFO(priv, "CONFIG_IWLWIFI_DEBUGFS enabled\n");
1184 #else
1185         IWL_INFO(priv, "CONFIG_IWLWIFI_DEBUGFS disabled\n");
1186 #endif
1187
1188 #ifdef CONFIG_IWLWIFI_DEVICE_TRACING
1189         IWL_INFO(priv, "CONFIG_IWLWIFI_DEVICE_TRACING enabled\n");
1190 #else
1191         IWL_INFO(priv, "CONFIG_IWLWIFI_DEVICE_TRACING disabled\n");
1192 #endif
1193 }
1194
1195 static int iwl_eeprom_init_hw_params(struct iwl_priv *priv)
1196 {
1197         struct iwl_nvm_data *data = priv->nvm_data;
1198
1199         if (data->sku_cap_11n_enable &&
1200             !priv->cfg->ht_params) {
1201                 IWL_ERR(priv, "Invalid 11n configuration\n");
1202                 return -EINVAL;
1203         }
1204
1205         if (!data->sku_cap_11n_enable && !data->sku_cap_band_24GHz_enable &&
1206             !data->sku_cap_band_52GHz_enable) {
1207                 IWL_ERR(priv, "Invalid device sku\n");
1208                 return -EINVAL;
1209         }
1210
1211         IWL_DEBUG_INFO(priv,
1212                        "Device SKU: 24GHz %s %s, 52GHz %s %s, 11.n %s %s\n",
1213                        data->sku_cap_band_24GHz_enable ? "" : "NOT", "enabled",
1214                        data->sku_cap_band_52GHz_enable ? "" : "NOT", "enabled",
1215                        data->sku_cap_11n_enable ? "" : "NOT", "enabled");
1216
1217         priv->hw_params.tx_chains_num =
1218                 num_of_ant(data->valid_tx_ant);
1219         if (priv->cfg->rx_with_siso_diversity)
1220                 priv->hw_params.rx_chains_num = 1;
1221         else
1222                 priv->hw_params.rx_chains_num =
1223                         num_of_ant(data->valid_rx_ant);
1224
1225         IWL_DEBUG_INFO(priv, "Valid Tx ant: 0x%X, Valid Rx ant: 0x%X\n",
1226                        data->valid_tx_ant,
1227                        data->valid_rx_ant);
1228
1229         return 0;
1230 }
1231
1232 static struct iwl_op_mode *iwl_op_mode_dvm_start(struct iwl_trans *trans,
1233                                                  const struct iwl_cfg *cfg,
1234                                                  const struct iwl_fw *fw,
1235                                                  struct dentry *dbgfs_dir)
1236 {
1237         struct iwl_priv *priv;
1238         struct ieee80211_hw *hw;
1239         struct iwl_op_mode *op_mode;
1240         u16 num_mac;
1241         u32 ucode_flags;
1242         struct iwl_trans_config trans_cfg = {};
1243         static const u8 no_reclaim_cmds[] = {
1244                 REPLY_RX_PHY_CMD,
1245                 REPLY_RX_MPDU_CMD,
1246                 REPLY_COMPRESSED_BA,
1247                 STATISTICS_NOTIFICATION,
1248                 REPLY_TX,
1249         };
1250         int i;
1251
1252         /************************
1253          * 1. Allocating HW data
1254          ************************/
1255         hw = iwl_alloc_all();
1256         if (!hw) {
1257                 pr_err("%s: Cannot allocate network device\n", cfg->name);
1258                 goto out;
1259         }
1260
1261         op_mode = hw->priv;
1262         op_mode->ops = &iwl_dvm_ops;
1263         priv = IWL_OP_MODE_GET_DVM(op_mode);
1264         priv->trans = trans;
1265         priv->dev = trans->dev;
1266         priv->cfg = cfg;
1267         priv->fw = fw;
1268
1269         switch (priv->cfg->device_family) {
1270         case IWL_DEVICE_FAMILY_1000:
1271         case IWL_DEVICE_FAMILY_100:
1272                 priv->lib = &iwl_dvm_1000_cfg;
1273                 break;
1274         case IWL_DEVICE_FAMILY_2000:
1275                 priv->lib = &iwl_dvm_2000_cfg;
1276                 break;
1277         case IWL_DEVICE_FAMILY_105:
1278                 priv->lib = &iwl_dvm_105_cfg;
1279                 break;
1280         case IWL_DEVICE_FAMILY_2030:
1281         case IWL_DEVICE_FAMILY_135:
1282                 priv->lib = &iwl_dvm_2030_cfg;
1283                 break;
1284         case IWL_DEVICE_FAMILY_5000:
1285                 priv->lib = &iwl_dvm_5000_cfg;
1286                 break;
1287         case IWL_DEVICE_FAMILY_5150:
1288                 priv->lib = &iwl_dvm_5150_cfg;
1289                 break;
1290         case IWL_DEVICE_FAMILY_6000:
1291         case IWL_DEVICE_FAMILY_6000i:
1292                 priv->lib = &iwl_dvm_6000_cfg;
1293                 break;
1294         case IWL_DEVICE_FAMILY_6005:
1295                 priv->lib = &iwl_dvm_6005_cfg;
1296                 break;
1297         case IWL_DEVICE_FAMILY_6050:
1298         case IWL_DEVICE_FAMILY_6150:
1299                 priv->lib = &iwl_dvm_6050_cfg;
1300                 break;
1301         case IWL_DEVICE_FAMILY_6030:
1302                 priv->lib = &iwl_dvm_6030_cfg;
1303                 break;
1304         default:
1305                 break;
1306         }
1307
1308         if (WARN_ON(!priv->lib))
1309                 goto out_free_hw;
1310
1311         /*
1312          * Populate the state variables that the transport layer needs
1313          * to know about.
1314          */
1315         trans_cfg.op_mode = op_mode;
1316         trans_cfg.no_reclaim_cmds = no_reclaim_cmds;
1317         trans_cfg.n_no_reclaim_cmds = ARRAY_SIZE(no_reclaim_cmds);
1318
1319         switch (iwlwifi_mod_params.amsdu_size) {
1320         case IWL_AMSDU_4K:
1321                 trans_cfg.rx_buf_size = IWL_AMSDU_4K;
1322                 break;
1323         case IWL_AMSDU_8K:
1324                 trans_cfg.rx_buf_size = IWL_AMSDU_8K;
1325                 break;
1326         case IWL_AMSDU_12K:
1327         default:
1328                 trans_cfg.rx_buf_size = IWL_AMSDU_4K;
1329                 pr_err("Unsupported amsdu_size: %d\n",
1330                        iwlwifi_mod_params.amsdu_size);
1331         }
1332
1333         trans_cfg.cmd_q_wdg_timeout = IWL_WATCHDOG_DISABLED;
1334
1335         trans_cfg.command_groups = iwl_dvm_groups;
1336         trans_cfg.command_groups_size = ARRAY_SIZE(iwl_dvm_groups);
1337
1338         trans_cfg.cmd_fifo = IWLAGN_CMD_FIFO_NUM;
1339
1340         WARN_ON(sizeof(priv->transport_queue_stop) * BITS_PER_BYTE <
1341                 priv->cfg->base_params->num_of_queues);
1342
1343         ucode_flags = fw->ucode_capa.flags;
1344
1345         if (ucode_flags & IWL_UCODE_TLV_FLAGS_PAN) {
1346                 priv->sta_key_max_num = STA_KEY_MAX_NUM_PAN;
1347                 trans_cfg.cmd_queue = IWL_IPAN_CMD_QUEUE_NUM;
1348         } else {
1349                 priv->sta_key_max_num = STA_KEY_MAX_NUM;
1350                 trans_cfg.cmd_queue = IWL_DEFAULT_CMD_QUEUE_NUM;
1351         }
1352
1353         /* Configure transport layer */
1354         iwl_trans_configure(priv->trans, &trans_cfg);
1355
1356         trans->rx_mpdu_cmd = REPLY_RX_MPDU_CMD;
1357         trans->rx_mpdu_cmd_hdr_size = sizeof(struct iwl_rx_mpdu_res_start);
1358         trans->command_groups = trans_cfg.command_groups;
1359         trans->command_groups_size = trans_cfg.command_groups_size;
1360
1361         /* At this point both hw and priv are allocated. */
1362
1363         SET_IEEE80211_DEV(priv->hw, priv->trans->dev);
1364
1365         iwl_option_config(priv);
1366
1367         IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
1368
1369         /* is antenna coupling more than 35dB ? */
1370         priv->bt_ant_couple_ok =
1371                 (iwlwifi_mod_params.ant_coupling >
1372                         IWL_BT_ANTENNA_COUPLING_THRESHOLD) ?
1373                         true : false;
1374
1375         /* bt channel inhibition enabled*/
1376         priv->bt_ch_announce = true;
1377         IWL_DEBUG_INFO(priv, "BT channel inhibition is %s\n",
1378                        (priv->bt_ch_announce) ? "On" : "Off");
1379
1380         /* these spin locks will be used in apm_ops.init and EEPROM access
1381          * we should init now
1382          */
1383         spin_lock_init(&priv->statistics.lock);
1384
1385         /***********************
1386          * 2. Read REV register
1387          ***********************/
1388         IWL_INFO(priv, "Detected %s, REV=0x%X\n",
1389                 priv->cfg->name, priv->trans->hw_rev);
1390
1391         if (iwl_trans_start_hw(priv->trans))
1392                 goto out_free_hw;
1393
1394         /* Read the EEPROM */
1395         if (iwl_read_eeprom(priv->trans, &priv->eeprom_blob,
1396                             &priv->eeprom_blob_size)) {
1397                 IWL_ERR(priv, "Unable to init EEPROM\n");
1398                 goto out_free_hw;
1399         }
1400
1401         /* Reset chip to save power until we load uCode during "up". */
1402         iwl_trans_stop_device(priv->trans);
1403
1404         priv->nvm_data = iwl_parse_eeprom_data(priv->trans->dev, priv->cfg,
1405                                                   priv->eeprom_blob,
1406                                                   priv->eeprom_blob_size);
1407         if (!priv->nvm_data)
1408                 goto out_free_eeprom_blob;
1409
1410         if (iwl_nvm_check_version(priv->nvm_data, priv->trans))
1411                 goto out_free_eeprom;
1412
1413         if (iwl_eeprom_init_hw_params(priv))
1414                 goto out_free_eeprom;
1415
1416         /* extract MAC Address */
1417         memcpy(priv->addresses[0].addr, priv->nvm_data->hw_addr, ETH_ALEN);
1418         IWL_DEBUG_INFO(priv, "MAC address: %pM\n", priv->addresses[0].addr);
1419         priv->hw->wiphy->addresses = priv->addresses;
1420         priv->hw->wiphy->n_addresses = 1;
1421         num_mac = priv->nvm_data->n_hw_addrs;
1422         if (num_mac > 1) {
1423                 memcpy(priv->addresses[1].addr, priv->addresses[0].addr,
1424                        ETH_ALEN);
1425                 priv->addresses[1].addr[5]++;
1426                 priv->hw->wiphy->n_addresses++;
1427         }
1428
1429         /************************
1430          * 4. Setup HW constants
1431          ************************/
1432         iwl_set_hw_params(priv);
1433
1434         if (!(priv->nvm_data->sku_cap_ipan_enable)) {
1435                 IWL_DEBUG_INFO(priv, "Your EEPROM disabled PAN\n");
1436                 ucode_flags &= ~IWL_UCODE_TLV_FLAGS_PAN;
1437                 /*
1438                  * if not PAN, then don't support P2P -- might be a uCode
1439                  * packaging bug or due to the eeprom check above
1440                  */
1441                 priv->sta_key_max_num = STA_KEY_MAX_NUM;
1442                 trans_cfg.cmd_queue = IWL_DEFAULT_CMD_QUEUE_NUM;
1443
1444                 /* Configure transport layer again*/
1445                 iwl_trans_configure(priv->trans, &trans_cfg);
1446         }
1447
1448         /*******************
1449          * 5. Setup priv
1450          *******************/
1451         for (i = 0; i < IWL_MAX_HW_QUEUES; i++) {
1452                 priv->queue_to_mac80211[i] = IWL_INVALID_MAC80211_QUEUE;
1453                 if (i < IWLAGN_FIRST_AMPDU_QUEUE &&
1454                     i != IWL_DEFAULT_CMD_QUEUE_NUM &&
1455                     i != IWL_IPAN_CMD_QUEUE_NUM)
1456                         priv->queue_to_mac80211[i] = i;
1457                 atomic_set(&priv->queue_stop_count[i], 0);
1458         }
1459
1460         if (iwl_init_drv(priv))
1461                 goto out_free_eeprom;
1462
1463         /* At this point both hw and priv are initialized. */
1464
1465         /********************
1466          * 6. Setup services
1467          ********************/
1468         iwl_setup_deferred_work(priv);
1469         iwl_setup_rx_handlers(priv);
1470
1471         iwl_power_initialize(priv);
1472         iwl_tt_initialize(priv);
1473
1474         snprintf(priv->hw->wiphy->fw_version,
1475                  sizeof(priv->hw->wiphy->fw_version),
1476                  "%s", fw->fw_version);
1477
1478         priv->new_scan_threshold_behaviour =
1479                 !!(ucode_flags & IWL_UCODE_TLV_FLAGS_NEWSCAN);
1480
1481         priv->phy_calib_chain_noise_reset_cmd =
1482                 fw->ucode_capa.standard_phy_calibration_size;
1483         priv->phy_calib_chain_noise_gain_cmd =
1484                 fw->ucode_capa.standard_phy_calibration_size + 1;
1485
1486         /* initialize all valid contexts */
1487         iwl_init_context(priv, ucode_flags);
1488
1489         /**************************************************
1490          * This is still part of probe() in a sense...
1491          *
1492          * 7. Setup and register with mac80211 and debugfs
1493          **************************************************/
1494         if (iwlagn_mac_setup_register(priv, &fw->ucode_capa))
1495                 goto out_destroy_workqueue;
1496
1497         if (iwl_dbgfs_register(priv, dbgfs_dir))
1498                 goto out_mac80211_unregister;
1499
1500         return op_mode;
1501
1502 out_mac80211_unregister:
1503         iwlagn_mac_unregister(priv);
1504 out_destroy_workqueue:
1505         iwl_tt_exit(priv);
1506         iwl_cancel_deferred_work(priv);
1507         destroy_workqueue(priv->workqueue);
1508         priv->workqueue = NULL;
1509         iwl_uninit_drv(priv);
1510 out_free_eeprom_blob:
1511         kfree(priv->eeprom_blob);
1512 out_free_eeprom:
1513         iwl_free_nvm_data(priv->nvm_data);
1514 out_free_hw:
1515         ieee80211_free_hw(priv->hw);
1516 out:
1517         op_mode = NULL;
1518         return op_mode;
1519 }
1520
1521 static void iwl_op_mode_dvm_stop(struct iwl_op_mode *op_mode)
1522 {
1523         struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
1524
1525         IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
1526
1527         iwlagn_mac_unregister(priv);
1528
1529         iwl_tt_exit(priv);
1530
1531         kfree(priv->eeprom_blob);
1532         iwl_free_nvm_data(priv->nvm_data);
1533
1534         /*netif_stop_queue(dev); */
1535         flush_workqueue(priv->workqueue);
1536
1537         /* ieee80211_unregister_hw calls iwlagn_mac_stop, which flushes
1538          * priv->workqueue... so we can't take down the workqueue
1539          * until now... */
1540         destroy_workqueue(priv->workqueue);
1541         priv->workqueue = NULL;
1542
1543         iwl_uninit_drv(priv);
1544
1545         dev_kfree_skb(priv->beacon_skb);
1546
1547         iwl_trans_op_mode_leave(priv->trans);
1548         ieee80211_free_hw(priv->hw);
1549 }
1550
1551 static const char * const desc_lookup_text[] = {
1552         "OK",
1553         "FAIL",
1554         "BAD_PARAM",
1555         "BAD_CHECKSUM",
1556         "NMI_INTERRUPT_WDG",
1557         "SYSASSERT",
1558         "FATAL_ERROR",
1559         "BAD_COMMAND",
1560         "HW_ERROR_TUNE_LOCK",
1561         "HW_ERROR_TEMPERATURE",
1562         "ILLEGAL_CHAN_FREQ",
1563         "VCC_NOT_STABLE",
1564         "FH_ERROR",
1565         "NMI_INTERRUPT_HOST",
1566         "NMI_INTERRUPT_ACTION_PT",
1567         "NMI_INTERRUPT_UNKNOWN",
1568         "UCODE_VERSION_MISMATCH",
1569         "HW_ERROR_ABS_LOCK",
1570         "HW_ERROR_CAL_LOCK_FAIL",
1571         "NMI_INTERRUPT_INST_ACTION_PT",
1572         "NMI_INTERRUPT_DATA_ACTION_PT",
1573         "NMI_TRM_HW_ER",
1574         "NMI_INTERRUPT_TRM",
1575         "NMI_INTERRUPT_BREAK_POINT",
1576         "DEBUG_0",
1577         "DEBUG_1",
1578         "DEBUG_2",
1579         "DEBUG_3",
1580 };
1581
1582 static struct { char *name; u8 num; } advanced_lookup[] = {
1583         { "NMI_INTERRUPT_WDG", 0x34 },
1584         { "SYSASSERT", 0x35 },
1585         { "UCODE_VERSION_MISMATCH", 0x37 },
1586         { "BAD_COMMAND", 0x38 },
1587         { "NMI_INTERRUPT_DATA_ACTION_PT", 0x3C },
1588         { "FATAL_ERROR", 0x3D },
1589         { "NMI_TRM_HW_ERR", 0x46 },
1590         { "NMI_INTERRUPT_TRM", 0x4C },
1591         { "NMI_INTERRUPT_BREAK_POINT", 0x54 },
1592         { "NMI_INTERRUPT_WDG_RXF_FULL", 0x5C },
1593         { "NMI_INTERRUPT_WDG_NO_RBD_RXF_FULL", 0x64 },
1594         { "NMI_INTERRUPT_HOST", 0x66 },
1595         { "NMI_INTERRUPT_ACTION_PT", 0x7C },
1596         { "NMI_INTERRUPT_UNKNOWN", 0x84 },
1597         { "NMI_INTERRUPT_INST_ACTION_PT", 0x86 },
1598         { "ADVANCED_SYSASSERT", 0 },
1599 };
1600
1601 static const char *desc_lookup(u32 num)
1602 {
1603         int i;
1604         int max = ARRAY_SIZE(desc_lookup_text);
1605
1606         if (num < max)
1607                 return desc_lookup_text[num];
1608
1609         max = ARRAY_SIZE(advanced_lookup) - 1;
1610         for (i = 0; i < max; i++) {
1611                 if (advanced_lookup[i].num == num)
1612                         break;
1613         }
1614         return advanced_lookup[i].name;
1615 }
1616
1617 #define ERROR_START_OFFSET  (1 * sizeof(u32))
1618 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
1619
1620 static void iwl_dump_nic_error_log(struct iwl_priv *priv)
1621 {
1622         struct iwl_trans *trans = priv->trans;
1623         u32 base;
1624         struct iwl_error_event_table table;
1625
1626         base = priv->device_pointers.error_event_table;
1627         if (priv->cur_ucode == IWL_UCODE_INIT) {
1628                 if (!base)
1629                         base = priv->fw->init_errlog_ptr;
1630         } else {
1631                 if (!base)
1632                         base = priv->fw->inst_errlog_ptr;
1633         }
1634
1635         if (!iwlagn_hw_valid_rtc_data_addr(base)) {
1636                 IWL_ERR(priv,
1637                         "Not valid error log pointer 0x%08X for %s uCode\n",
1638                         base,
1639                         (priv->cur_ucode == IWL_UCODE_INIT)
1640                                         ? "Init" : "RT");
1641                 return;
1642         }
1643
1644         /*TODO: Update dbgfs with ISR error stats obtained below */
1645         iwl_trans_read_mem_bytes(trans, base, &table, sizeof(table));
1646
1647         if (ERROR_START_OFFSET <= table.valid * ERROR_ELEM_SIZE) {
1648                 IWL_ERR(trans, "Start IWL Error Log Dump:\n");
1649                 IWL_ERR(trans, "Status: 0x%08lX, count: %d\n",
1650                         priv->status, table.valid);
1651         }
1652
1653         trace_iwlwifi_dev_ucode_error(trans->dev, table.error_id, table.tsf_low,
1654                                       table.data1, table.data2, table.line,
1655                                       table.blink2, table.ilink1, table.ilink2,
1656                                       table.bcon_time, table.gp1, table.gp2,
1657                                       table.gp3, table.ucode_ver, table.hw_ver,
1658                                       0, table.brd_ver);
1659         IWL_ERR(priv, "0x%08X | %-28s\n", table.error_id,
1660                 desc_lookup(table.error_id));
1661         IWL_ERR(priv, "0x%08X | uPc\n", table.pc);
1662         IWL_ERR(priv, "0x%08X | branchlink1\n", table.blink1);
1663         IWL_ERR(priv, "0x%08X | branchlink2\n", table.blink2);
1664         IWL_ERR(priv, "0x%08X | interruptlink1\n", table.ilink1);
1665         IWL_ERR(priv, "0x%08X | interruptlink2\n", table.ilink2);
1666         IWL_ERR(priv, "0x%08X | data1\n", table.data1);
1667         IWL_ERR(priv, "0x%08X | data2\n", table.data2);
1668         IWL_ERR(priv, "0x%08X | line\n", table.line);
1669         IWL_ERR(priv, "0x%08X | beacon time\n", table.bcon_time);
1670         IWL_ERR(priv, "0x%08X | tsf low\n", table.tsf_low);
1671         IWL_ERR(priv, "0x%08X | tsf hi\n", table.tsf_hi);
1672         IWL_ERR(priv, "0x%08X | time gp1\n", table.gp1);
1673         IWL_ERR(priv, "0x%08X | time gp2\n", table.gp2);
1674         IWL_ERR(priv, "0x%08X | time gp3\n", table.gp3);
1675         IWL_ERR(priv, "0x%08X | uCode version\n", table.ucode_ver);
1676         IWL_ERR(priv, "0x%08X | hw version\n", table.hw_ver);
1677         IWL_ERR(priv, "0x%08X | board version\n", table.brd_ver);
1678         IWL_ERR(priv, "0x%08X | hcmd\n", table.hcmd);
1679         IWL_ERR(priv, "0x%08X | isr0\n", table.isr0);
1680         IWL_ERR(priv, "0x%08X | isr1\n", table.isr1);
1681         IWL_ERR(priv, "0x%08X | isr2\n", table.isr2);
1682         IWL_ERR(priv, "0x%08X | isr3\n", table.isr3);
1683         IWL_ERR(priv, "0x%08X | isr4\n", table.isr4);
1684         IWL_ERR(priv, "0x%08X | isr_pref\n", table.isr_pref);
1685         IWL_ERR(priv, "0x%08X | wait_event\n", table.wait_event);
1686         IWL_ERR(priv, "0x%08X | l2p_control\n", table.l2p_control);
1687         IWL_ERR(priv, "0x%08X | l2p_duration\n", table.l2p_duration);
1688         IWL_ERR(priv, "0x%08X | l2p_mhvalid\n", table.l2p_mhvalid);
1689         IWL_ERR(priv, "0x%08X | l2p_addr_match\n", table.l2p_addr_match);
1690         IWL_ERR(priv, "0x%08X | lmpm_pmg_sel\n", table.lmpm_pmg_sel);
1691         IWL_ERR(priv, "0x%08X | timestamp\n", table.u_timestamp);
1692         IWL_ERR(priv, "0x%08X | flow_handler\n", table.flow_handler);
1693 }
1694
1695 #define EVENT_START_OFFSET  (4 * sizeof(u32))
1696
1697 /**
1698  * iwl_print_event_log - Dump error event log to syslog
1699  *
1700  */
1701 static int iwl_print_event_log(struct iwl_priv *priv, u32 start_idx,
1702                                u32 num_events, u32 mode,
1703                                int pos, char **buf, size_t bufsz)
1704 {
1705         u32 i;
1706         u32 base;       /* SRAM byte address of event log header */
1707         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
1708         u32 ptr;        /* SRAM byte address of log data */
1709         u32 ev, time, data; /* event log data */
1710         unsigned long reg_flags;
1711
1712         struct iwl_trans *trans = priv->trans;
1713
1714         if (num_events == 0)
1715                 return pos;
1716
1717         base = priv->device_pointers.log_event_table;
1718         if (priv->cur_ucode == IWL_UCODE_INIT) {
1719                 if (!base)
1720                         base = priv->fw->init_evtlog_ptr;
1721         } else {
1722                 if (!base)
1723                         base = priv->fw->inst_evtlog_ptr;
1724         }
1725
1726         if (mode == 0)
1727                 event_size = 2 * sizeof(u32);
1728         else
1729                 event_size = 3 * sizeof(u32);
1730
1731         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
1732
1733         /* Make sure device is powered up for SRAM reads */
1734         if (!iwl_trans_grab_nic_access(trans, &reg_flags))
1735                 return pos;
1736
1737         /* Set starting address; reads will auto-increment */
1738         iwl_write32(trans, HBUS_TARG_MEM_RADDR, ptr);
1739
1740         /* "time" is actually "data" for mode 0 (no timestamp).
1741         * place event id # at far right for easier visual parsing. */
1742         for (i = 0; i < num_events; i++) {
1743                 ev = iwl_read32(trans, HBUS_TARG_MEM_RDAT);
1744                 time = iwl_read32(trans, HBUS_TARG_MEM_RDAT);
1745                 if (mode == 0) {
1746                         /* data, ev */
1747                         if (bufsz) {
1748                                 pos += scnprintf(*buf + pos, bufsz - pos,
1749                                                 "EVT_LOG:0x%08x:%04u\n",
1750                                                 time, ev);
1751                         } else {
1752                                 trace_iwlwifi_dev_ucode_event(trans->dev, 0,
1753                                         time, ev);
1754                                 IWL_ERR(priv, "EVT_LOG:0x%08x:%04u\n",
1755                                         time, ev);
1756                         }
1757                 } else {
1758                         data = iwl_read32(trans, HBUS_TARG_MEM_RDAT);
1759                         if (bufsz) {
1760                                 pos += scnprintf(*buf + pos, bufsz - pos,
1761                                                 "EVT_LOGT:%010u:0x%08x:%04u\n",
1762                                                  time, data, ev);
1763                         } else {
1764                                 IWL_ERR(priv, "EVT_LOGT:%010u:0x%08x:%04u\n",
1765                                         time, data, ev);
1766                                 trace_iwlwifi_dev_ucode_event(trans->dev, time,
1767                                         data, ev);
1768                         }
1769                 }
1770         }
1771
1772         /* Allow device to power down */
1773         iwl_trans_release_nic_access(trans, &reg_flags);
1774         return pos;
1775 }
1776
1777 /**
1778  * iwl_print_last_event_logs - Dump the newest # of event log to syslog
1779  */
1780 static int iwl_print_last_event_logs(struct iwl_priv *priv, u32 capacity,
1781                                     u32 num_wraps, u32 next_entry,
1782                                     u32 size, u32 mode,
1783                                     int pos, char **buf, size_t bufsz)
1784 {
1785         /*
1786          * display the newest DEFAULT_LOG_ENTRIES entries
1787          * i.e the entries just before the next ont that uCode would fill.
1788          */
1789         if (num_wraps) {
1790                 if (next_entry < size) {
1791                         pos = iwl_print_event_log(priv,
1792                                                 capacity - (size - next_entry),
1793                                                 size - next_entry, mode,
1794                                                 pos, buf, bufsz);
1795                         pos = iwl_print_event_log(priv, 0,
1796                                                   next_entry, mode,
1797                                                   pos, buf, bufsz);
1798                 } else
1799                         pos = iwl_print_event_log(priv, next_entry - size,
1800                                                   size, mode, pos, buf, bufsz);
1801         } else {
1802                 if (next_entry < size) {
1803                         pos = iwl_print_event_log(priv, 0, next_entry,
1804                                                   mode, pos, buf, bufsz);
1805                 } else {
1806                         pos = iwl_print_event_log(priv, next_entry - size,
1807                                                   size, mode, pos, buf, bufsz);
1808                 }
1809         }
1810         return pos;
1811 }
1812
1813 #define DEFAULT_DUMP_EVENT_LOG_ENTRIES (20)
1814
1815 int iwl_dump_nic_event_log(struct iwl_priv *priv, bool full_log,
1816                             char **buf)
1817 {
1818         u32 base;       /* SRAM byte address of event log header */
1819         u32 capacity;   /* event log capacity in # entries */
1820         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
1821         u32 num_wraps;  /* # times uCode wrapped to top of log */
1822         u32 next_entry; /* index of next entry to be written by uCode */
1823         u32 size;       /* # entries that we'll print */
1824         u32 logsize;
1825         int pos = 0;
1826         size_t bufsz = 0;
1827         struct iwl_trans *trans = priv->trans;
1828
1829         base = priv->device_pointers.log_event_table;
1830         if (priv->cur_ucode == IWL_UCODE_INIT) {
1831                 logsize = priv->fw->init_evtlog_size;
1832                 if (!base)
1833                         base = priv->fw->init_evtlog_ptr;
1834         } else {
1835                 logsize = priv->fw->inst_evtlog_size;
1836                 if (!base)
1837                         base = priv->fw->inst_evtlog_ptr;
1838         }
1839
1840         if (!iwlagn_hw_valid_rtc_data_addr(base)) {
1841                 IWL_ERR(priv,
1842                         "Invalid event log pointer 0x%08X for %s uCode\n",
1843                         base,
1844                         (priv->cur_ucode == IWL_UCODE_INIT)
1845                                         ? "Init" : "RT");
1846                 return -EINVAL;
1847         }
1848
1849         /* event log header */
1850         capacity = iwl_trans_read_mem32(trans, base);
1851         mode = iwl_trans_read_mem32(trans, base + (1 * sizeof(u32)));
1852         num_wraps = iwl_trans_read_mem32(trans, base + (2 * sizeof(u32)));
1853         next_entry = iwl_trans_read_mem32(trans, base + (3 * sizeof(u32)));
1854
1855         if (capacity > logsize) {
1856                 IWL_ERR(priv, "Log capacity %d is bogus, limit to %d "
1857                         "entries\n", capacity, logsize);
1858                 capacity = logsize;
1859         }
1860
1861         if (next_entry > logsize) {
1862                 IWL_ERR(priv, "Log write index %d is bogus, limit to %d\n",
1863                         next_entry, logsize);
1864                 next_entry = logsize;
1865         }
1866
1867         size = num_wraps ? capacity : next_entry;
1868
1869         /* bail out if nothing in log */
1870         if (size == 0) {
1871                 IWL_ERR(trans, "Start IWL Event Log Dump: nothing in log\n");
1872                 return pos;
1873         }
1874
1875         if (!(iwl_have_debug_level(IWL_DL_FW_ERRORS)) && !full_log)
1876                 size = (size > DEFAULT_DUMP_EVENT_LOG_ENTRIES)
1877                         ? DEFAULT_DUMP_EVENT_LOG_ENTRIES : size;
1878         IWL_ERR(priv, "Start IWL Event Log Dump: display last %u entries\n",
1879                 size);
1880
1881 #ifdef CONFIG_IWLWIFI_DEBUG
1882         if (buf) {
1883                 if (full_log)
1884                         bufsz = capacity * 48;
1885                 else
1886                         bufsz = size * 48;
1887                 *buf = kmalloc(bufsz, GFP_KERNEL);
1888                 if (!*buf)
1889                         return -ENOMEM;
1890         }
1891         if (iwl_have_debug_level(IWL_DL_FW_ERRORS) || full_log) {
1892                 /*
1893                  * if uCode has wrapped back to top of log,
1894                  * start at the oldest entry,
1895                  * i.e the next one that uCode would fill.
1896                  */
1897                 if (num_wraps)
1898                         pos = iwl_print_event_log(priv, next_entry,
1899                                                 capacity - next_entry, mode,
1900                                                 pos, buf, bufsz);
1901                 /* (then/else) start at top of log */
1902                 pos = iwl_print_event_log(priv, 0,
1903                                           next_entry, mode, pos, buf, bufsz);
1904         } else
1905                 pos = iwl_print_last_event_logs(priv, capacity, num_wraps,
1906                                                 next_entry, size, mode,
1907                                                 pos, buf, bufsz);
1908 #else
1909         pos = iwl_print_last_event_logs(priv, capacity, num_wraps,
1910                                         next_entry, size, mode,
1911                                         pos, buf, bufsz);
1912 #endif
1913         return pos;
1914 }
1915
1916 static void iwlagn_fw_error(struct iwl_priv *priv, bool ondemand)
1917 {
1918         unsigned int reload_msec;
1919         unsigned long reload_jiffies;
1920
1921         if (iwl_have_debug_level(IWL_DL_FW_ERRORS))
1922                 iwl_print_rx_config_cmd(priv, IWL_RXON_CTX_BSS);
1923
1924         /* uCode is no longer loaded. */
1925         priv->ucode_loaded = false;
1926
1927         /* Set the FW error flag -- cleared on iwl_down */
1928         set_bit(STATUS_FW_ERROR, &priv->status);
1929
1930         iwl_abort_notification_waits(&priv->notif_wait);
1931
1932         /* Keep the restart process from trying to send host
1933          * commands by clearing the ready bit */
1934         clear_bit(STATUS_READY, &priv->status);
1935
1936         if (!ondemand) {
1937                 /*
1938                  * If firmware keep reloading, then it indicate something
1939                  * serious wrong and firmware having problem to recover
1940                  * from it. Instead of keep trying which will fill the syslog
1941                  * and hang the system, let's just stop it
1942                  */
1943                 reload_jiffies = jiffies;
1944                 reload_msec = jiffies_to_msecs((long) reload_jiffies -
1945                                         (long) priv->reload_jiffies);
1946                 priv->reload_jiffies = reload_jiffies;
1947                 if (reload_msec <= IWL_MIN_RELOAD_DURATION) {
1948                         priv->reload_count++;
1949                         if (priv->reload_count >= IWL_MAX_CONTINUE_RELOAD_CNT) {
1950                                 IWL_ERR(priv, "BUG_ON, Stop restarting\n");
1951                                 return;
1952                         }
1953                 } else
1954                         priv->reload_count = 0;
1955         }
1956
1957         if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1958                 if (iwlwifi_mod_params.restart_fw) {
1959                         IWL_DEBUG_FW_ERRORS(priv,
1960                                   "Restarting adapter due to uCode error.\n");
1961                         queue_work(priv->workqueue, &priv->restart);
1962                 } else
1963                         IWL_DEBUG_FW_ERRORS(priv,
1964                                   "Detected FW error, but not restarting\n");
1965         }
1966 }
1967
1968 static void iwl_nic_error(struct iwl_op_mode *op_mode)
1969 {
1970         struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
1971
1972         IWL_ERR(priv, "Loaded firmware version: %s\n",
1973                 priv->fw->fw_version);
1974
1975         iwl_dump_nic_error_log(priv);
1976         iwl_dump_nic_event_log(priv, false, NULL);
1977
1978         iwlagn_fw_error(priv, false);
1979 }
1980
1981 static void iwl_cmd_queue_full(struct iwl_op_mode *op_mode)
1982 {
1983         struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
1984
1985         if (!iwl_check_for_ct_kill(priv)) {
1986                 IWL_ERR(priv, "Restarting adapter queue is full\n");
1987                 iwlagn_fw_error(priv, false);
1988         }
1989 }
1990
1991 #define EEPROM_RF_CONFIG_TYPE_MAX      0x3
1992
1993 static void iwl_nic_config(struct iwl_op_mode *op_mode)
1994 {
1995         struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
1996
1997         /* SKU Control */
1998         iwl_trans_set_bits_mask(priv->trans, CSR_HW_IF_CONFIG_REG,
1999                                 CSR_HW_IF_CONFIG_REG_MSK_MAC_DASH |
2000                                 CSR_HW_IF_CONFIG_REG_MSK_MAC_STEP,
2001                                 (CSR_HW_REV_STEP(priv->trans->hw_rev) <<
2002                                         CSR_HW_IF_CONFIG_REG_POS_MAC_STEP) |
2003                                 (CSR_HW_REV_DASH(priv->trans->hw_rev) <<
2004                                         CSR_HW_IF_CONFIG_REG_POS_MAC_DASH));
2005
2006         /* write radio config values to register */
2007         if (priv->nvm_data->radio_cfg_type <= EEPROM_RF_CONFIG_TYPE_MAX) {
2008                 u32 reg_val =
2009                         priv->nvm_data->radio_cfg_type <<
2010                                 CSR_HW_IF_CONFIG_REG_POS_PHY_TYPE |
2011                         priv->nvm_data->radio_cfg_step <<
2012                                 CSR_HW_IF_CONFIG_REG_POS_PHY_STEP |
2013                         priv->nvm_data->radio_cfg_dash <<
2014                                 CSR_HW_IF_CONFIG_REG_POS_PHY_DASH;
2015
2016                 iwl_trans_set_bits_mask(priv->trans, CSR_HW_IF_CONFIG_REG,
2017                                         CSR_HW_IF_CONFIG_REG_MSK_PHY_TYPE |
2018                                         CSR_HW_IF_CONFIG_REG_MSK_PHY_STEP |
2019                                         CSR_HW_IF_CONFIG_REG_MSK_PHY_DASH,
2020                                         reg_val);
2021
2022                 IWL_INFO(priv, "Radio type=0x%x-0x%x-0x%x\n",
2023                          priv->nvm_data->radio_cfg_type,
2024                          priv->nvm_data->radio_cfg_step,
2025                          priv->nvm_data->radio_cfg_dash);
2026         } else {
2027                 WARN_ON(1);
2028         }
2029
2030         /* set CSR_HW_CONFIG_REG for uCode use */
2031         iwl_set_bit(priv->trans, CSR_HW_IF_CONFIG_REG,
2032                     CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI |
2033                     CSR_HW_IF_CONFIG_REG_BIT_MAC_SI);
2034
2035         /* W/A : NIC is stuck in a reset state after Early PCIe power off
2036          * (PCIe power is lost before PERST# is asserted),
2037          * causing ME FW to lose ownership and not being able to obtain it back.
2038          */
2039         iwl_set_bits_mask_prph(priv->trans, APMG_PS_CTRL_REG,
2040                                APMG_PS_CTRL_EARLY_PWR_OFF_RESET_DIS,
2041                                ~APMG_PS_CTRL_EARLY_PWR_OFF_RESET_DIS);
2042
2043         if (priv->lib->nic_config)
2044                 priv->lib->nic_config(priv);
2045 }
2046
2047 static void iwl_wimax_active(struct iwl_op_mode *op_mode)
2048 {
2049         struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
2050
2051         clear_bit(STATUS_READY, &priv->status);
2052         IWL_ERR(priv, "RF is used by WiMAX\n");
2053 }
2054
2055 static void iwl_stop_sw_queue(struct iwl_op_mode *op_mode, int queue)
2056 {
2057         struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
2058         int mq = priv->queue_to_mac80211[queue];
2059
2060         if (WARN_ON_ONCE(mq == IWL_INVALID_MAC80211_QUEUE))
2061                 return;
2062
2063         if (atomic_inc_return(&priv->queue_stop_count[mq]) > 1) {
2064                 IWL_DEBUG_TX_QUEUES(priv,
2065                         "queue %d (mac80211 %d) already stopped\n",
2066                         queue, mq);
2067                 return;
2068         }
2069
2070         set_bit(mq, &priv->transport_queue_stop);
2071         ieee80211_stop_queue(priv->hw, mq);
2072 }
2073
2074 static void iwl_wake_sw_queue(struct iwl_op_mode *op_mode, int queue)
2075 {
2076         struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
2077         int mq = priv->queue_to_mac80211[queue];
2078
2079         if (WARN_ON_ONCE(mq == IWL_INVALID_MAC80211_QUEUE))
2080                 return;
2081
2082         if (atomic_dec_return(&priv->queue_stop_count[mq]) > 0) {
2083                 IWL_DEBUG_TX_QUEUES(priv,
2084                         "queue %d (mac80211 %d) already awake\n",
2085                         queue, mq);
2086                 return;
2087         }
2088
2089         clear_bit(mq, &priv->transport_queue_stop);
2090
2091         if (!priv->passive_no_rx)
2092                 ieee80211_wake_queue(priv->hw, mq);
2093 }
2094
2095 void iwlagn_lift_passive_no_rx(struct iwl_priv *priv)
2096 {
2097         int mq;
2098
2099         if (!priv->passive_no_rx)
2100                 return;
2101
2102         for (mq = 0; mq < IWLAGN_FIRST_AMPDU_QUEUE; mq++) {
2103                 if (!test_bit(mq, &priv->transport_queue_stop)) {
2104                         IWL_DEBUG_TX_QUEUES(priv, "Wake queue %d\n", mq);
2105                         ieee80211_wake_queue(priv->hw, mq);
2106                 } else {
2107                         IWL_DEBUG_TX_QUEUES(priv, "Don't wake queue %d\n", mq);
2108                 }
2109         }
2110
2111         priv->passive_no_rx = false;
2112 }
2113
2114 static void iwl_free_skb(struct iwl_op_mode *op_mode, struct sk_buff *skb)
2115 {
2116         struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
2117         struct ieee80211_tx_info *info;
2118
2119         info = IEEE80211_SKB_CB(skb);
2120         iwl_trans_free_tx_cmd(priv->trans, info->driver_data[1]);
2121         ieee80211_free_txskb(priv->hw, skb);
2122 }
2123
2124 static bool iwl_set_hw_rfkill_state(struct iwl_op_mode *op_mode, bool state)
2125 {
2126         struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
2127
2128         if (state)
2129                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2130         else
2131                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2132
2133         wiphy_rfkill_set_hw_state(priv->hw->wiphy, state);
2134
2135         return false;
2136 }
2137
2138 static const struct iwl_op_mode_ops iwl_dvm_ops = {
2139         .start = iwl_op_mode_dvm_start,
2140         .stop = iwl_op_mode_dvm_stop,
2141         .rx = iwl_rx_dispatch,
2142         .queue_full = iwl_stop_sw_queue,
2143         .queue_not_full = iwl_wake_sw_queue,
2144         .hw_rf_kill = iwl_set_hw_rfkill_state,
2145         .free_skb = iwl_free_skb,
2146         .nic_error = iwl_nic_error,
2147         .cmd_queue_full = iwl_cmd_queue_full,
2148         .nic_config = iwl_nic_config,
2149         .wimax_active = iwl_wimax_active,
2150 };
2151
2152 /*****************************************************************************
2153  *
2154  * driver and module entry point
2155  *
2156  *****************************************************************************/
2157 static int __init iwl_init(void)
2158 {
2159
2160         int ret;
2161
2162         ret = iwlagn_rate_control_register();
2163         if (ret) {
2164                 pr_err("Unable to register rate control algorithm: %d\n", ret);
2165                 return ret;
2166         }
2167
2168         ret = iwl_opmode_register("iwldvm", &iwl_dvm_ops);
2169         if (ret) {
2170                 pr_err("Unable to register op_mode: %d\n", ret);
2171                 iwlagn_rate_control_unregister();
2172         }
2173
2174         return ret;
2175 }
2176 module_init(iwl_init);
2177
2178 static void __exit iwl_exit(void)
2179 {
2180         iwl_opmode_deregister("iwldvm");
2181         iwlagn_rate_control_unregister();
2182 }
2183 module_exit(iwl_exit);