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_DEF:
1321         case IWL_AMSDU_4K:
1322                 trans_cfg.rx_buf_size = IWL_AMSDU_4K;
1323                 break;
1324         case IWL_AMSDU_8K:
1325                 trans_cfg.rx_buf_size = IWL_AMSDU_8K;
1326                 break;
1327         case IWL_AMSDU_12K:
1328         default:
1329                 trans_cfg.rx_buf_size = IWL_AMSDU_4K;
1330                 pr_err("Unsupported amsdu_size: %d\n",
1331                        iwlwifi_mod_params.amsdu_size);
1332         }
1333
1334         trans_cfg.cmd_q_wdg_timeout = IWL_WATCHDOG_DISABLED;
1335
1336         trans_cfg.command_groups = iwl_dvm_groups;
1337         trans_cfg.command_groups_size = ARRAY_SIZE(iwl_dvm_groups);
1338
1339         trans_cfg.cmd_fifo = IWLAGN_CMD_FIFO_NUM;
1340         trans_cfg.cb_data_offs = offsetof(struct ieee80211_tx_info,
1341                                           driver_data[2]);
1342
1343         WARN_ON(sizeof(priv->transport_queue_stop) * BITS_PER_BYTE <
1344                 priv->cfg->base_params->num_of_queues);
1345
1346         ucode_flags = fw->ucode_capa.flags;
1347
1348         if (ucode_flags & IWL_UCODE_TLV_FLAGS_PAN) {
1349                 priv->sta_key_max_num = STA_KEY_MAX_NUM_PAN;
1350                 trans_cfg.cmd_queue = IWL_IPAN_CMD_QUEUE_NUM;
1351         } else {
1352                 priv->sta_key_max_num = STA_KEY_MAX_NUM;
1353                 trans_cfg.cmd_queue = IWL_DEFAULT_CMD_QUEUE_NUM;
1354         }
1355
1356         /* Configure transport layer */
1357         iwl_trans_configure(priv->trans, &trans_cfg);
1358
1359         trans->rx_mpdu_cmd = REPLY_RX_MPDU_CMD;
1360         trans->rx_mpdu_cmd_hdr_size = sizeof(struct iwl_rx_mpdu_res_start);
1361         trans->command_groups = trans_cfg.command_groups;
1362         trans->command_groups_size = trans_cfg.command_groups_size;
1363
1364         /* At this point both hw and priv are allocated. */
1365
1366         SET_IEEE80211_DEV(priv->hw, priv->trans->dev);
1367
1368         iwl_option_config(priv);
1369
1370         IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
1371
1372         /* is antenna coupling more than 35dB ? */
1373         priv->bt_ant_couple_ok =
1374                 (iwlwifi_mod_params.ant_coupling >
1375                         IWL_BT_ANTENNA_COUPLING_THRESHOLD) ?
1376                         true : false;
1377
1378         /* bt channel inhibition enabled*/
1379         priv->bt_ch_announce = true;
1380         IWL_DEBUG_INFO(priv, "BT channel inhibition is %s\n",
1381                        (priv->bt_ch_announce) ? "On" : "Off");
1382
1383         /* these spin locks will be used in apm_ops.init and EEPROM access
1384          * we should init now
1385          */
1386         spin_lock_init(&priv->statistics.lock);
1387
1388         /***********************
1389          * 2. Read REV register
1390          ***********************/
1391         IWL_INFO(priv, "Detected %s, REV=0x%X\n",
1392                 priv->cfg->name, priv->trans->hw_rev);
1393
1394         if (iwl_trans_start_hw(priv->trans))
1395                 goto out_free_hw;
1396
1397         /* Read the EEPROM */
1398         if (iwl_read_eeprom(priv->trans, &priv->eeprom_blob,
1399                             &priv->eeprom_blob_size)) {
1400                 IWL_ERR(priv, "Unable to init EEPROM\n");
1401                 goto out_free_hw;
1402         }
1403
1404         /* Reset chip to save power until we load uCode during "up". */
1405         iwl_trans_stop_device(priv->trans);
1406
1407         priv->nvm_data = iwl_parse_eeprom_data(priv->trans->dev, priv->cfg,
1408                                                   priv->eeprom_blob,
1409                                                   priv->eeprom_blob_size);
1410         if (!priv->nvm_data)
1411                 goto out_free_eeprom_blob;
1412
1413         if (iwl_nvm_check_version(priv->nvm_data, priv->trans))
1414                 goto out_free_eeprom;
1415
1416         if (iwl_eeprom_init_hw_params(priv))
1417                 goto out_free_eeprom;
1418
1419         /* extract MAC Address */
1420         memcpy(priv->addresses[0].addr, priv->nvm_data->hw_addr, ETH_ALEN);
1421         IWL_DEBUG_INFO(priv, "MAC address: %pM\n", priv->addresses[0].addr);
1422         priv->hw->wiphy->addresses = priv->addresses;
1423         priv->hw->wiphy->n_addresses = 1;
1424         num_mac = priv->nvm_data->n_hw_addrs;
1425         if (num_mac > 1) {
1426                 memcpy(priv->addresses[1].addr, priv->addresses[0].addr,
1427                        ETH_ALEN);
1428                 priv->addresses[1].addr[5]++;
1429                 priv->hw->wiphy->n_addresses++;
1430         }
1431
1432         /************************
1433          * 4. Setup HW constants
1434          ************************/
1435         iwl_set_hw_params(priv);
1436
1437         if (!(priv->nvm_data->sku_cap_ipan_enable)) {
1438                 IWL_DEBUG_INFO(priv, "Your EEPROM disabled PAN\n");
1439                 ucode_flags &= ~IWL_UCODE_TLV_FLAGS_PAN;
1440                 /*
1441                  * if not PAN, then don't support P2P -- might be a uCode
1442                  * packaging bug or due to the eeprom check above
1443                  */
1444                 priv->sta_key_max_num = STA_KEY_MAX_NUM;
1445                 trans_cfg.cmd_queue = IWL_DEFAULT_CMD_QUEUE_NUM;
1446
1447                 /* Configure transport layer again*/
1448                 iwl_trans_configure(priv->trans, &trans_cfg);
1449         }
1450
1451         /*******************
1452          * 5. Setup priv
1453          *******************/
1454         for (i = 0; i < IWL_MAX_HW_QUEUES; i++) {
1455                 priv->queue_to_mac80211[i] = IWL_INVALID_MAC80211_QUEUE;
1456                 if (i < IWLAGN_FIRST_AMPDU_QUEUE &&
1457                     i != IWL_DEFAULT_CMD_QUEUE_NUM &&
1458                     i != IWL_IPAN_CMD_QUEUE_NUM)
1459                         priv->queue_to_mac80211[i] = i;
1460                 atomic_set(&priv->queue_stop_count[i], 0);
1461         }
1462
1463         if (iwl_init_drv(priv))
1464                 goto out_free_eeprom;
1465
1466         /* At this point both hw and priv are initialized. */
1467
1468         /********************
1469          * 6. Setup services
1470          ********************/
1471         iwl_setup_deferred_work(priv);
1472         iwl_setup_rx_handlers(priv);
1473
1474         iwl_power_initialize(priv);
1475         iwl_tt_initialize(priv);
1476
1477         snprintf(priv->hw->wiphy->fw_version,
1478                  sizeof(priv->hw->wiphy->fw_version),
1479                  "%s", fw->fw_version);
1480
1481         priv->new_scan_threshold_behaviour =
1482                 !!(ucode_flags & IWL_UCODE_TLV_FLAGS_NEWSCAN);
1483
1484         priv->phy_calib_chain_noise_reset_cmd =
1485                 fw->ucode_capa.standard_phy_calibration_size;
1486         priv->phy_calib_chain_noise_gain_cmd =
1487                 fw->ucode_capa.standard_phy_calibration_size + 1;
1488
1489         /* initialize all valid contexts */
1490         iwl_init_context(priv, ucode_flags);
1491
1492         /**************************************************
1493          * This is still part of probe() in a sense...
1494          *
1495          * 7. Setup and register with mac80211 and debugfs
1496          **************************************************/
1497         if (iwlagn_mac_setup_register(priv, &fw->ucode_capa))
1498                 goto out_destroy_workqueue;
1499
1500         if (iwl_dbgfs_register(priv, dbgfs_dir))
1501                 goto out_mac80211_unregister;
1502
1503         return op_mode;
1504
1505 out_mac80211_unregister:
1506         iwlagn_mac_unregister(priv);
1507 out_destroy_workqueue:
1508         iwl_tt_exit(priv);
1509         iwl_cancel_deferred_work(priv);
1510         destroy_workqueue(priv->workqueue);
1511         priv->workqueue = NULL;
1512         iwl_uninit_drv(priv);
1513 out_free_eeprom_blob:
1514         kfree(priv->eeprom_blob);
1515 out_free_eeprom:
1516         iwl_free_nvm_data(priv->nvm_data);
1517 out_free_hw:
1518         ieee80211_free_hw(priv->hw);
1519 out:
1520         op_mode = NULL;
1521         return op_mode;
1522 }
1523
1524 static void iwl_op_mode_dvm_stop(struct iwl_op_mode *op_mode)
1525 {
1526         struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
1527
1528         IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
1529
1530         iwlagn_mac_unregister(priv);
1531
1532         iwl_tt_exit(priv);
1533
1534         kfree(priv->eeprom_blob);
1535         iwl_free_nvm_data(priv->nvm_data);
1536
1537         /*netif_stop_queue(dev); */
1538         flush_workqueue(priv->workqueue);
1539
1540         /* ieee80211_unregister_hw calls iwlagn_mac_stop, which flushes
1541          * priv->workqueue... so we can't take down the workqueue
1542          * until now... */
1543         destroy_workqueue(priv->workqueue);
1544         priv->workqueue = NULL;
1545
1546         iwl_uninit_drv(priv);
1547
1548         dev_kfree_skb(priv->beacon_skb);
1549
1550         iwl_trans_op_mode_leave(priv->trans);
1551         ieee80211_free_hw(priv->hw);
1552 }
1553
1554 static const char * const desc_lookup_text[] = {
1555         "OK",
1556         "FAIL",
1557         "BAD_PARAM",
1558         "BAD_CHECKSUM",
1559         "NMI_INTERRUPT_WDG",
1560         "SYSASSERT",
1561         "FATAL_ERROR",
1562         "BAD_COMMAND",
1563         "HW_ERROR_TUNE_LOCK",
1564         "HW_ERROR_TEMPERATURE",
1565         "ILLEGAL_CHAN_FREQ",
1566         "VCC_NOT_STABLE",
1567         "FH_ERROR",
1568         "NMI_INTERRUPT_HOST",
1569         "NMI_INTERRUPT_ACTION_PT",
1570         "NMI_INTERRUPT_UNKNOWN",
1571         "UCODE_VERSION_MISMATCH",
1572         "HW_ERROR_ABS_LOCK",
1573         "HW_ERROR_CAL_LOCK_FAIL",
1574         "NMI_INTERRUPT_INST_ACTION_PT",
1575         "NMI_INTERRUPT_DATA_ACTION_PT",
1576         "NMI_TRM_HW_ER",
1577         "NMI_INTERRUPT_TRM",
1578         "NMI_INTERRUPT_BREAK_POINT",
1579         "DEBUG_0",
1580         "DEBUG_1",
1581         "DEBUG_2",
1582         "DEBUG_3",
1583 };
1584
1585 static struct { char *name; u8 num; } advanced_lookup[] = {
1586         { "NMI_INTERRUPT_WDG", 0x34 },
1587         { "SYSASSERT", 0x35 },
1588         { "UCODE_VERSION_MISMATCH", 0x37 },
1589         { "BAD_COMMAND", 0x38 },
1590         { "NMI_INTERRUPT_DATA_ACTION_PT", 0x3C },
1591         { "FATAL_ERROR", 0x3D },
1592         { "NMI_TRM_HW_ERR", 0x46 },
1593         { "NMI_INTERRUPT_TRM", 0x4C },
1594         { "NMI_INTERRUPT_BREAK_POINT", 0x54 },
1595         { "NMI_INTERRUPT_WDG_RXF_FULL", 0x5C },
1596         { "NMI_INTERRUPT_WDG_NO_RBD_RXF_FULL", 0x64 },
1597         { "NMI_INTERRUPT_HOST", 0x66 },
1598         { "NMI_INTERRUPT_ACTION_PT", 0x7C },
1599         { "NMI_INTERRUPT_UNKNOWN", 0x84 },
1600         { "NMI_INTERRUPT_INST_ACTION_PT", 0x86 },
1601         { "ADVANCED_SYSASSERT", 0 },
1602 };
1603
1604 static const char *desc_lookup(u32 num)
1605 {
1606         int i;
1607         int max = ARRAY_SIZE(desc_lookup_text);
1608
1609         if (num < max)
1610                 return desc_lookup_text[num];
1611
1612         max = ARRAY_SIZE(advanced_lookup) - 1;
1613         for (i = 0; i < max; i++) {
1614                 if (advanced_lookup[i].num == num)
1615                         break;
1616         }
1617         return advanced_lookup[i].name;
1618 }
1619
1620 #define ERROR_START_OFFSET  (1 * sizeof(u32))
1621 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
1622
1623 static void iwl_dump_nic_error_log(struct iwl_priv *priv)
1624 {
1625         struct iwl_trans *trans = priv->trans;
1626         u32 base;
1627         struct iwl_error_event_table table;
1628
1629         base = priv->device_pointers.error_event_table;
1630         if (priv->cur_ucode == IWL_UCODE_INIT) {
1631                 if (!base)
1632                         base = priv->fw->init_errlog_ptr;
1633         } else {
1634                 if (!base)
1635                         base = priv->fw->inst_errlog_ptr;
1636         }
1637
1638         if (!iwlagn_hw_valid_rtc_data_addr(base)) {
1639                 IWL_ERR(priv,
1640                         "Not valid error log pointer 0x%08X for %s uCode\n",
1641                         base,
1642                         (priv->cur_ucode == IWL_UCODE_INIT)
1643                                         ? "Init" : "RT");
1644                 return;
1645         }
1646
1647         /*TODO: Update dbgfs with ISR error stats obtained below */
1648         iwl_trans_read_mem_bytes(trans, base, &table, sizeof(table));
1649
1650         if (ERROR_START_OFFSET <= table.valid * ERROR_ELEM_SIZE) {
1651                 IWL_ERR(trans, "Start IWL Error Log Dump:\n");
1652                 IWL_ERR(trans, "Status: 0x%08lX, count: %d\n",
1653                         priv->status, table.valid);
1654         }
1655
1656         trace_iwlwifi_dev_ucode_error(trans->dev, table.error_id, table.tsf_low,
1657                                       table.data1, table.data2, table.line,
1658                                       table.blink2, table.ilink1, table.ilink2,
1659                                       table.bcon_time, table.gp1, table.gp2,
1660                                       table.gp3, table.ucode_ver, table.hw_ver,
1661                                       0, table.brd_ver);
1662         IWL_ERR(priv, "0x%08X | %-28s\n", table.error_id,
1663                 desc_lookup(table.error_id));
1664         IWL_ERR(priv, "0x%08X | uPc\n", table.pc);
1665         IWL_ERR(priv, "0x%08X | branchlink1\n", table.blink1);
1666         IWL_ERR(priv, "0x%08X | branchlink2\n", table.blink2);
1667         IWL_ERR(priv, "0x%08X | interruptlink1\n", table.ilink1);
1668         IWL_ERR(priv, "0x%08X | interruptlink2\n", table.ilink2);
1669         IWL_ERR(priv, "0x%08X | data1\n", table.data1);
1670         IWL_ERR(priv, "0x%08X | data2\n", table.data2);
1671         IWL_ERR(priv, "0x%08X | line\n", table.line);
1672         IWL_ERR(priv, "0x%08X | beacon time\n", table.bcon_time);
1673         IWL_ERR(priv, "0x%08X | tsf low\n", table.tsf_low);
1674         IWL_ERR(priv, "0x%08X | tsf hi\n", table.tsf_hi);
1675         IWL_ERR(priv, "0x%08X | time gp1\n", table.gp1);
1676         IWL_ERR(priv, "0x%08X | time gp2\n", table.gp2);
1677         IWL_ERR(priv, "0x%08X | time gp3\n", table.gp3);
1678         IWL_ERR(priv, "0x%08X | uCode version\n", table.ucode_ver);
1679         IWL_ERR(priv, "0x%08X | hw version\n", table.hw_ver);
1680         IWL_ERR(priv, "0x%08X | board version\n", table.brd_ver);
1681         IWL_ERR(priv, "0x%08X | hcmd\n", table.hcmd);
1682         IWL_ERR(priv, "0x%08X | isr0\n", table.isr0);
1683         IWL_ERR(priv, "0x%08X | isr1\n", table.isr1);
1684         IWL_ERR(priv, "0x%08X | isr2\n", table.isr2);
1685         IWL_ERR(priv, "0x%08X | isr3\n", table.isr3);
1686         IWL_ERR(priv, "0x%08X | isr4\n", table.isr4);
1687         IWL_ERR(priv, "0x%08X | isr_pref\n", table.isr_pref);
1688         IWL_ERR(priv, "0x%08X | wait_event\n", table.wait_event);
1689         IWL_ERR(priv, "0x%08X | l2p_control\n", table.l2p_control);
1690         IWL_ERR(priv, "0x%08X | l2p_duration\n", table.l2p_duration);
1691         IWL_ERR(priv, "0x%08X | l2p_mhvalid\n", table.l2p_mhvalid);
1692         IWL_ERR(priv, "0x%08X | l2p_addr_match\n", table.l2p_addr_match);
1693         IWL_ERR(priv, "0x%08X | lmpm_pmg_sel\n", table.lmpm_pmg_sel);
1694         IWL_ERR(priv, "0x%08X | timestamp\n", table.u_timestamp);
1695         IWL_ERR(priv, "0x%08X | flow_handler\n", table.flow_handler);
1696 }
1697
1698 #define EVENT_START_OFFSET  (4 * sizeof(u32))
1699
1700 /**
1701  * iwl_print_event_log - Dump error event log to syslog
1702  *
1703  */
1704 static int iwl_print_event_log(struct iwl_priv *priv, u32 start_idx,
1705                                u32 num_events, u32 mode,
1706                                int pos, char **buf, size_t bufsz)
1707 {
1708         u32 i;
1709         u32 base;       /* SRAM byte address of event log header */
1710         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
1711         u32 ptr;        /* SRAM byte address of log data */
1712         u32 ev, time, data; /* event log data */
1713         unsigned long reg_flags;
1714
1715         struct iwl_trans *trans = priv->trans;
1716
1717         if (num_events == 0)
1718                 return pos;
1719
1720         base = priv->device_pointers.log_event_table;
1721         if (priv->cur_ucode == IWL_UCODE_INIT) {
1722                 if (!base)
1723                         base = priv->fw->init_evtlog_ptr;
1724         } else {
1725                 if (!base)
1726                         base = priv->fw->inst_evtlog_ptr;
1727         }
1728
1729         if (mode == 0)
1730                 event_size = 2 * sizeof(u32);
1731         else
1732                 event_size = 3 * sizeof(u32);
1733
1734         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
1735
1736         /* Make sure device is powered up for SRAM reads */
1737         if (!iwl_trans_grab_nic_access(trans, &reg_flags))
1738                 return pos;
1739
1740         /* Set starting address; reads will auto-increment */
1741         iwl_write32(trans, HBUS_TARG_MEM_RADDR, ptr);
1742
1743         /* "time" is actually "data" for mode 0 (no timestamp).
1744         * place event id # at far right for easier visual parsing. */
1745         for (i = 0; i < num_events; i++) {
1746                 ev = iwl_read32(trans, HBUS_TARG_MEM_RDAT);
1747                 time = iwl_read32(trans, HBUS_TARG_MEM_RDAT);
1748                 if (mode == 0) {
1749                         /* data, ev */
1750                         if (bufsz) {
1751                                 pos += scnprintf(*buf + pos, bufsz - pos,
1752                                                 "EVT_LOG:0x%08x:%04u\n",
1753                                                 time, ev);
1754                         } else {
1755                                 trace_iwlwifi_dev_ucode_event(trans->dev, 0,
1756                                         time, ev);
1757                                 IWL_ERR(priv, "EVT_LOG:0x%08x:%04u\n",
1758                                         time, ev);
1759                         }
1760                 } else {
1761                         data = iwl_read32(trans, HBUS_TARG_MEM_RDAT);
1762                         if (bufsz) {
1763                                 pos += scnprintf(*buf + pos, bufsz - pos,
1764                                                 "EVT_LOGT:%010u:0x%08x:%04u\n",
1765                                                  time, data, ev);
1766                         } else {
1767                                 IWL_ERR(priv, "EVT_LOGT:%010u:0x%08x:%04u\n",
1768                                         time, data, ev);
1769                                 trace_iwlwifi_dev_ucode_event(trans->dev, time,
1770                                         data, ev);
1771                         }
1772                 }
1773         }
1774
1775         /* Allow device to power down */
1776         iwl_trans_release_nic_access(trans, &reg_flags);
1777         return pos;
1778 }
1779
1780 /**
1781  * iwl_print_last_event_logs - Dump the newest # of event log to syslog
1782  */
1783 static int iwl_print_last_event_logs(struct iwl_priv *priv, u32 capacity,
1784                                     u32 num_wraps, u32 next_entry,
1785                                     u32 size, u32 mode,
1786                                     int pos, char **buf, size_t bufsz)
1787 {
1788         /*
1789          * display the newest DEFAULT_LOG_ENTRIES entries
1790          * i.e the entries just before the next ont that uCode would fill.
1791          */
1792         if (num_wraps) {
1793                 if (next_entry < size) {
1794                         pos = iwl_print_event_log(priv,
1795                                                 capacity - (size - next_entry),
1796                                                 size - next_entry, mode,
1797                                                 pos, buf, bufsz);
1798                         pos = iwl_print_event_log(priv, 0,
1799                                                   next_entry, mode,
1800                                                   pos, buf, bufsz);
1801                 } else
1802                         pos = iwl_print_event_log(priv, next_entry - size,
1803                                                   size, mode, pos, buf, bufsz);
1804         } else {
1805                 if (next_entry < size) {
1806                         pos = iwl_print_event_log(priv, 0, next_entry,
1807                                                   mode, pos, buf, bufsz);
1808                 } else {
1809                         pos = iwl_print_event_log(priv, next_entry - size,
1810                                                   size, mode, pos, buf, bufsz);
1811                 }
1812         }
1813         return pos;
1814 }
1815
1816 #define DEFAULT_DUMP_EVENT_LOG_ENTRIES (20)
1817
1818 int iwl_dump_nic_event_log(struct iwl_priv *priv, bool full_log,
1819                             char **buf)
1820 {
1821         u32 base;       /* SRAM byte address of event log header */
1822         u32 capacity;   /* event log capacity in # entries */
1823         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
1824         u32 num_wraps;  /* # times uCode wrapped to top of log */
1825         u32 next_entry; /* index of next entry to be written by uCode */
1826         u32 size;       /* # entries that we'll print */
1827         u32 logsize;
1828         int pos = 0;
1829         size_t bufsz = 0;
1830         struct iwl_trans *trans = priv->trans;
1831
1832         base = priv->device_pointers.log_event_table;
1833         if (priv->cur_ucode == IWL_UCODE_INIT) {
1834                 logsize = priv->fw->init_evtlog_size;
1835                 if (!base)
1836                         base = priv->fw->init_evtlog_ptr;
1837         } else {
1838                 logsize = priv->fw->inst_evtlog_size;
1839                 if (!base)
1840                         base = priv->fw->inst_evtlog_ptr;
1841         }
1842
1843         if (!iwlagn_hw_valid_rtc_data_addr(base)) {
1844                 IWL_ERR(priv,
1845                         "Invalid event log pointer 0x%08X for %s uCode\n",
1846                         base,
1847                         (priv->cur_ucode == IWL_UCODE_INIT)
1848                                         ? "Init" : "RT");
1849                 return -EINVAL;
1850         }
1851
1852         /* event log header */
1853         capacity = iwl_trans_read_mem32(trans, base);
1854         mode = iwl_trans_read_mem32(trans, base + (1 * sizeof(u32)));
1855         num_wraps = iwl_trans_read_mem32(trans, base + (2 * sizeof(u32)));
1856         next_entry = iwl_trans_read_mem32(trans, base + (3 * sizeof(u32)));
1857
1858         if (capacity > logsize) {
1859                 IWL_ERR(priv, "Log capacity %d is bogus, limit to %d "
1860                         "entries\n", capacity, logsize);
1861                 capacity = logsize;
1862         }
1863
1864         if (next_entry > logsize) {
1865                 IWL_ERR(priv, "Log write index %d is bogus, limit to %d\n",
1866                         next_entry, logsize);
1867                 next_entry = logsize;
1868         }
1869
1870         size = num_wraps ? capacity : next_entry;
1871
1872         /* bail out if nothing in log */
1873         if (size == 0) {
1874                 IWL_ERR(trans, "Start IWL Event Log Dump: nothing in log\n");
1875                 return pos;
1876         }
1877
1878         if (!(iwl_have_debug_level(IWL_DL_FW_ERRORS)) && !full_log)
1879                 size = (size > DEFAULT_DUMP_EVENT_LOG_ENTRIES)
1880                         ? DEFAULT_DUMP_EVENT_LOG_ENTRIES : size;
1881         IWL_ERR(priv, "Start IWL Event Log Dump: display last %u entries\n",
1882                 size);
1883
1884 #ifdef CONFIG_IWLWIFI_DEBUG
1885         if (buf) {
1886                 if (full_log)
1887                         bufsz = capacity * 48;
1888                 else
1889                         bufsz = size * 48;
1890                 *buf = kmalloc(bufsz, GFP_KERNEL);
1891                 if (!*buf)
1892                         return -ENOMEM;
1893         }
1894         if (iwl_have_debug_level(IWL_DL_FW_ERRORS) || full_log) {
1895                 /*
1896                  * if uCode has wrapped back to top of log,
1897                  * start at the oldest entry,
1898                  * i.e the next one that uCode would fill.
1899                  */
1900                 if (num_wraps)
1901                         pos = iwl_print_event_log(priv, next_entry,
1902                                                 capacity - next_entry, mode,
1903                                                 pos, buf, bufsz);
1904                 /* (then/else) start at top of log */
1905                 pos = iwl_print_event_log(priv, 0,
1906                                           next_entry, mode, pos, buf, bufsz);
1907         } else
1908                 pos = iwl_print_last_event_logs(priv, capacity, num_wraps,
1909                                                 next_entry, size, mode,
1910                                                 pos, buf, bufsz);
1911 #else
1912         pos = iwl_print_last_event_logs(priv, capacity, num_wraps,
1913                                         next_entry, size, mode,
1914                                         pos, buf, bufsz);
1915 #endif
1916         return pos;
1917 }
1918
1919 static void iwlagn_fw_error(struct iwl_priv *priv, bool ondemand)
1920 {
1921         unsigned int reload_msec;
1922         unsigned long reload_jiffies;
1923
1924         if (iwl_have_debug_level(IWL_DL_FW_ERRORS))
1925                 iwl_print_rx_config_cmd(priv, IWL_RXON_CTX_BSS);
1926
1927         /* uCode is no longer loaded. */
1928         priv->ucode_loaded = false;
1929
1930         /* Set the FW error flag -- cleared on iwl_down */
1931         set_bit(STATUS_FW_ERROR, &priv->status);
1932
1933         iwl_abort_notification_waits(&priv->notif_wait);
1934
1935         /* Keep the restart process from trying to send host
1936          * commands by clearing the ready bit */
1937         clear_bit(STATUS_READY, &priv->status);
1938
1939         if (!ondemand) {
1940                 /*
1941                  * If firmware keep reloading, then it indicate something
1942                  * serious wrong and firmware having problem to recover
1943                  * from it. Instead of keep trying which will fill the syslog
1944                  * and hang the system, let's just stop it
1945                  */
1946                 reload_jiffies = jiffies;
1947                 reload_msec = jiffies_to_msecs((long) reload_jiffies -
1948                                         (long) priv->reload_jiffies);
1949                 priv->reload_jiffies = reload_jiffies;
1950                 if (reload_msec <= IWL_MIN_RELOAD_DURATION) {
1951                         priv->reload_count++;
1952                         if (priv->reload_count >= IWL_MAX_CONTINUE_RELOAD_CNT) {
1953                                 IWL_ERR(priv, "BUG_ON, Stop restarting\n");
1954                                 return;
1955                         }
1956                 } else
1957                         priv->reload_count = 0;
1958         }
1959
1960         if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1961                 if (iwlwifi_mod_params.restart_fw) {
1962                         IWL_DEBUG_FW_ERRORS(priv,
1963                                   "Restarting adapter due to uCode error.\n");
1964                         queue_work(priv->workqueue, &priv->restart);
1965                 } else
1966                         IWL_DEBUG_FW_ERRORS(priv,
1967                                   "Detected FW error, but not restarting\n");
1968         }
1969 }
1970
1971 static void iwl_nic_error(struct iwl_op_mode *op_mode)
1972 {
1973         struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
1974
1975         IWL_ERR(priv, "Loaded firmware version: %s\n",
1976                 priv->fw->fw_version);
1977
1978         iwl_dump_nic_error_log(priv);
1979         iwl_dump_nic_event_log(priv, false, NULL);
1980
1981         iwlagn_fw_error(priv, false);
1982 }
1983
1984 static void iwl_cmd_queue_full(struct iwl_op_mode *op_mode)
1985 {
1986         struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
1987
1988         if (!iwl_check_for_ct_kill(priv)) {
1989                 IWL_ERR(priv, "Restarting adapter queue is full\n");
1990                 iwlagn_fw_error(priv, false);
1991         }
1992 }
1993
1994 #define EEPROM_RF_CONFIG_TYPE_MAX      0x3
1995
1996 static void iwl_nic_config(struct iwl_op_mode *op_mode)
1997 {
1998         struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
1999
2000         /* SKU Control */
2001         iwl_trans_set_bits_mask(priv->trans, CSR_HW_IF_CONFIG_REG,
2002                                 CSR_HW_IF_CONFIG_REG_MSK_MAC_DASH |
2003                                 CSR_HW_IF_CONFIG_REG_MSK_MAC_STEP,
2004                                 (CSR_HW_REV_STEP(priv->trans->hw_rev) <<
2005                                         CSR_HW_IF_CONFIG_REG_POS_MAC_STEP) |
2006                                 (CSR_HW_REV_DASH(priv->trans->hw_rev) <<
2007                                         CSR_HW_IF_CONFIG_REG_POS_MAC_DASH));
2008
2009         /* write radio config values to register */
2010         if (priv->nvm_data->radio_cfg_type <= EEPROM_RF_CONFIG_TYPE_MAX) {
2011                 u32 reg_val =
2012                         priv->nvm_data->radio_cfg_type <<
2013                                 CSR_HW_IF_CONFIG_REG_POS_PHY_TYPE |
2014                         priv->nvm_data->radio_cfg_step <<
2015                                 CSR_HW_IF_CONFIG_REG_POS_PHY_STEP |
2016                         priv->nvm_data->radio_cfg_dash <<
2017                                 CSR_HW_IF_CONFIG_REG_POS_PHY_DASH;
2018
2019                 iwl_trans_set_bits_mask(priv->trans, CSR_HW_IF_CONFIG_REG,
2020                                         CSR_HW_IF_CONFIG_REG_MSK_PHY_TYPE |
2021                                         CSR_HW_IF_CONFIG_REG_MSK_PHY_STEP |
2022                                         CSR_HW_IF_CONFIG_REG_MSK_PHY_DASH,
2023                                         reg_val);
2024
2025                 IWL_INFO(priv, "Radio type=0x%x-0x%x-0x%x\n",
2026                          priv->nvm_data->radio_cfg_type,
2027                          priv->nvm_data->radio_cfg_step,
2028                          priv->nvm_data->radio_cfg_dash);
2029         } else {
2030                 WARN_ON(1);
2031         }
2032
2033         /* set CSR_HW_CONFIG_REG for uCode use */
2034         iwl_set_bit(priv->trans, CSR_HW_IF_CONFIG_REG,
2035                     CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI |
2036                     CSR_HW_IF_CONFIG_REG_BIT_MAC_SI);
2037
2038         /* W/A : NIC is stuck in a reset state after Early PCIe power off
2039          * (PCIe power is lost before PERST# is asserted),
2040          * causing ME FW to lose ownership and not being able to obtain it back.
2041          */
2042         iwl_set_bits_mask_prph(priv->trans, APMG_PS_CTRL_REG,
2043                                APMG_PS_CTRL_EARLY_PWR_OFF_RESET_DIS,
2044                                ~APMG_PS_CTRL_EARLY_PWR_OFF_RESET_DIS);
2045
2046         if (priv->lib->nic_config)
2047                 priv->lib->nic_config(priv);
2048 }
2049
2050 static void iwl_wimax_active(struct iwl_op_mode *op_mode)
2051 {
2052         struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
2053
2054         clear_bit(STATUS_READY, &priv->status);
2055         IWL_ERR(priv, "RF is used by WiMAX\n");
2056 }
2057
2058 static void iwl_stop_sw_queue(struct iwl_op_mode *op_mode, int queue)
2059 {
2060         struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
2061         int mq = priv->queue_to_mac80211[queue];
2062
2063         if (WARN_ON_ONCE(mq == IWL_INVALID_MAC80211_QUEUE))
2064                 return;
2065
2066         if (atomic_inc_return(&priv->queue_stop_count[mq]) > 1) {
2067                 IWL_DEBUG_TX_QUEUES(priv,
2068                         "queue %d (mac80211 %d) already stopped\n",
2069                         queue, mq);
2070                 return;
2071         }
2072
2073         set_bit(mq, &priv->transport_queue_stop);
2074         ieee80211_stop_queue(priv->hw, mq);
2075 }
2076
2077 static void iwl_wake_sw_queue(struct iwl_op_mode *op_mode, int queue)
2078 {
2079         struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
2080         int mq = priv->queue_to_mac80211[queue];
2081
2082         if (WARN_ON_ONCE(mq == IWL_INVALID_MAC80211_QUEUE))
2083                 return;
2084
2085         if (atomic_dec_return(&priv->queue_stop_count[mq]) > 0) {
2086                 IWL_DEBUG_TX_QUEUES(priv,
2087                         "queue %d (mac80211 %d) already awake\n",
2088                         queue, mq);
2089                 return;
2090         }
2091
2092         clear_bit(mq, &priv->transport_queue_stop);
2093
2094         if (!priv->passive_no_rx)
2095                 ieee80211_wake_queue(priv->hw, mq);
2096 }
2097
2098 void iwlagn_lift_passive_no_rx(struct iwl_priv *priv)
2099 {
2100         int mq;
2101
2102         if (!priv->passive_no_rx)
2103                 return;
2104
2105         for (mq = 0; mq < IWLAGN_FIRST_AMPDU_QUEUE; mq++) {
2106                 if (!test_bit(mq, &priv->transport_queue_stop)) {
2107                         IWL_DEBUG_TX_QUEUES(priv, "Wake queue %d\n", mq);
2108                         ieee80211_wake_queue(priv->hw, mq);
2109                 } else {
2110                         IWL_DEBUG_TX_QUEUES(priv, "Don't wake queue %d\n", mq);
2111                 }
2112         }
2113
2114         priv->passive_no_rx = false;
2115 }
2116
2117 static void iwl_free_skb(struct iwl_op_mode *op_mode, struct sk_buff *skb)
2118 {
2119         struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
2120         struct ieee80211_tx_info *info;
2121
2122         info = IEEE80211_SKB_CB(skb);
2123         iwl_trans_free_tx_cmd(priv->trans, info->driver_data[1]);
2124         ieee80211_free_txskb(priv->hw, skb);
2125 }
2126
2127 static bool iwl_set_hw_rfkill_state(struct iwl_op_mode *op_mode, bool state)
2128 {
2129         struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
2130
2131         if (state)
2132                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2133         else
2134                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2135
2136         wiphy_rfkill_set_hw_state(priv->hw->wiphy, state);
2137
2138         return false;
2139 }
2140
2141 static const struct iwl_op_mode_ops iwl_dvm_ops = {
2142         .start = iwl_op_mode_dvm_start,
2143         .stop = iwl_op_mode_dvm_stop,
2144         .rx = iwl_rx_dispatch,
2145         .queue_full = iwl_stop_sw_queue,
2146         .queue_not_full = iwl_wake_sw_queue,
2147         .hw_rf_kill = iwl_set_hw_rfkill_state,
2148         .free_skb = iwl_free_skb,
2149         .nic_error = iwl_nic_error,
2150         .cmd_queue_full = iwl_cmd_queue_full,
2151         .nic_config = iwl_nic_config,
2152         .wimax_active = iwl_wimax_active,
2153 };
2154
2155 /*****************************************************************************
2156  *
2157  * driver and module entry point
2158  *
2159  *****************************************************************************/
2160 static int __init iwl_init(void)
2161 {
2162
2163         int ret;
2164
2165         ret = iwlagn_rate_control_register();
2166         if (ret) {
2167                 pr_err("Unable to register rate control algorithm: %d\n", ret);
2168                 return ret;
2169         }
2170
2171         ret = iwl_opmode_register("iwldvm", &iwl_dvm_ops);
2172         if (ret) {
2173                 pr_err("Unable to register op_mode: %d\n", ret);
2174                 iwlagn_rate_control_unregister();
2175         }
2176
2177         return ret;
2178 }
2179 module_init(iwl_init);
2180
2181 static void __exit iwl_exit(void)
2182 {
2183         iwl_opmode_deregister("iwldvm");
2184         iwlagn_rate_control_unregister();
2185 }
2186 module_exit(iwl_exit);