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

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /******************************************************************************
   3  *
   4  * Copyright(c) 2003 - 2014, 2018 - 2022 Intel Corporation. All rights reserved.
   5  * Copyright(c) 2024 Intel Corporation. All rights reserved.
   6  * Copyright(c) 2015 Intel Deutschland GmbH
   7  *
   8  * Portions of this file are derived from the ipw3945 project, as well
   9  * as portions of the ieee80211 subsystem header files.
  10  *****************************************************************************/
  11
  12 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  13
  14 #include <linux/kernel.h>
  15 #include <linux/module.h>
  16 #include <linux/init.h>
  17 #include <linux/slab.h>
  18 #include <linux/delay.h>
  19 #include <linux/sched.h>
  20 #include <linux/skbuff.h>
  21 #include <linux/netdevice.h>
  22 #include <linux/etherdevice.h>
  23 #include <linux/if_arp.h>
  24
  25 #include <net/mac80211.h>
  26
  27 #include <asm/div64.h>
  28
  29 #include "iwl-nvm-utils.h"
  30 #include "iwl-io.h"
  31 #include "iwl-trans.h"
  32 #include "iwl-op-mode.h"
  33 #include "iwl-drv.h"
  34 #include "iwl-modparams.h"
  35 #include "iwl-prph.h"
  36
  37 #include "dev.h"
  38 #include "calib.h"
  39 #include "agn.h"
  40
  41
  42 /******************************************************************************
  43  *
  44  * module boiler plate
  45  *
  46  ******************************************************************************/
  47
  48 #define DRV_DESCRIPTION "Intel(R) Wireless WiFi Link AGN driver for Linux"
  49 MODULE_DESCRIPTION(DRV_DESCRIPTION);
  50 MODULE_LICENSE("GPL");
  51 MODULE_IMPORT_NS("IWLWIFI");
  52
  53 /* Please keep this array *SORTED* by hex value.
  54  * Access is done through binary search.
  55  * A warning will be triggered on violation.
  56  */
  57 static const struct iwl_hcmd_names iwl_dvm_cmd_names[] = {
  58         HCMD_NAME(REPLY_ALIVE),
  59         HCMD_NAME(REPLY_ERROR),
  60         HCMD_NAME(REPLY_ECHO),
  61         HCMD_NAME(REPLY_RXON),
  62         HCMD_NAME(REPLY_RXON_ASSOC),
  63         HCMD_NAME(REPLY_QOS_PARAM),
  64         HCMD_NAME(REPLY_RXON_TIMING),
  65         HCMD_NAME(REPLY_ADD_STA),
  66         HCMD_NAME(REPLY_REMOVE_STA),
  67         HCMD_NAME(REPLY_REMOVE_ALL_STA),
  68         HCMD_NAME(REPLY_TX),
  69         HCMD_NAME(REPLY_TXFIFO_FLUSH),
  70         HCMD_NAME(REPLY_WEPKEY),
  71         HCMD_NAME(REPLY_LEDS_CMD),
  72         HCMD_NAME(REPLY_TX_LINK_QUALITY_CMD),
  73         HCMD_NAME(COEX_PRIORITY_TABLE_CMD),
  74         HCMD_NAME(COEX_MEDIUM_NOTIFICATION),
  75         HCMD_NAME(COEX_EVENT_CMD),
  76         HCMD_NAME(TEMPERATURE_NOTIFICATION),
  77         HCMD_NAME(CALIBRATION_CFG_CMD),
  78         HCMD_NAME(CALIBRATION_RES_NOTIFICATION),
  79         HCMD_NAME(CALIBRATION_COMPLETE_NOTIFICATION),
  80         HCMD_NAME(REPLY_QUIET_CMD),
  81         HCMD_NAME(REPLY_CHANNEL_SWITCH),
  82         HCMD_NAME(CHANNEL_SWITCH_NOTIFICATION),
  83         HCMD_NAME(REPLY_SPECTRUM_MEASUREMENT_CMD),
  84         HCMD_NAME(SPECTRUM_MEASURE_NOTIFICATION),
  85         HCMD_NAME(POWER_TABLE_CMD),
  86         HCMD_NAME(PM_SLEEP_NOTIFICATION),
  87         HCMD_NAME(PM_DEBUG_STATISTIC_NOTIFIC),
  88         HCMD_NAME(REPLY_SCAN_CMD),
  89         HCMD_NAME(REPLY_SCAN_ABORT_CMD),
  90         HCMD_NAME(SCAN_START_NOTIFICATION),
  91         HCMD_NAME(SCAN_RESULTS_NOTIFICATION),
  92         HCMD_NAME(SCAN_COMPLETE_NOTIFICATION),
  93         HCMD_NAME(BEACON_NOTIFICATION),
  94         HCMD_NAME(REPLY_TX_BEACON),
  95         HCMD_NAME(WHO_IS_AWAKE_NOTIFICATION),
  96         HCMD_NAME(REPLY_TX_POWER_DBM_CMD),
  97         HCMD_NAME(QUIET_NOTIFICATION),
  98         HCMD_NAME(REPLY_TX_PWR_TABLE_CMD),
  99         HCMD_NAME(REPLY_TX_POWER_DBM_CMD_V1),
 100         HCMD_NAME(TX_ANT_CONFIGURATION_CMD),
 101         HCMD_NAME(MEASURE_ABORT_NOTIFICATION),
 102         HCMD_NAME(REPLY_BT_CONFIG),
 103         HCMD_NAME(REPLY_STATISTICS_CMD),
 104         HCMD_NAME(STATISTICS_NOTIFICATION),
 105         HCMD_NAME(REPLY_CARD_STATE_CMD),
 106         HCMD_NAME(CARD_STATE_NOTIFICATION),
 107         HCMD_NAME(MISSED_BEACONS_NOTIFICATION),
 108         HCMD_NAME(REPLY_CT_KILL_CONFIG_CMD),
 109         HCMD_NAME(SENSITIVITY_CMD),
 110         HCMD_NAME(REPLY_PHY_CALIBRATION_CMD),
 111         HCMD_NAME(REPLY_WIPAN_PARAMS),
 112         HCMD_NAME(REPLY_WIPAN_RXON),
 113         HCMD_NAME(REPLY_WIPAN_RXON_TIMING),
 114         HCMD_NAME(REPLY_WIPAN_RXON_ASSOC),
 115         HCMD_NAME(REPLY_WIPAN_QOS_PARAM),
 116         HCMD_NAME(REPLY_WIPAN_WEPKEY),
 117         HCMD_NAME(REPLY_WIPAN_P2P_CHANNEL_SWITCH),
 118         HCMD_NAME(REPLY_WIPAN_NOA_NOTIFICATION),
 119         HCMD_NAME(REPLY_WIPAN_DEACTIVATION_COMPLETE),
 120         HCMD_NAME(REPLY_RX_PHY_CMD),
 121         HCMD_NAME(REPLY_RX_MPDU_CMD),
 122         HCMD_NAME(REPLY_RX),
 123         HCMD_NAME(REPLY_COMPRESSED_BA),
 124         HCMD_NAME(REPLY_BT_COEX_PRIO_TABLE),
 125         HCMD_NAME(REPLY_BT_COEX_PROT_ENV),
 126         HCMD_NAME(REPLY_BT_COEX_PROFILE_NOTIF),
 127         HCMD_NAME(REPLY_D3_CONFIG),
 128         HCMD_NAME(REPLY_WOWLAN_PATTERNS),
 129         HCMD_NAME(REPLY_WOWLAN_WAKEUP_FILTER),
 130         HCMD_NAME(REPLY_WOWLAN_TSC_RSC_PARAMS),
 131         HCMD_NAME(REPLY_WOWLAN_TKIP_PARAMS),
 132         HCMD_NAME(REPLY_WOWLAN_KEK_KCK_MATERIAL),
 133         HCMD_NAME(REPLY_WOWLAN_GET_STATUS),
 134 };
 135
 136 static const struct iwl_hcmd_arr iwl_dvm_groups[] = {
 137         [0x0] = HCMD_ARR(iwl_dvm_cmd_names),
 138 };
 139
 140 static const struct iwl_op_mode_ops iwl_dvm_ops;
 141
 142 void iwl_update_chain_flags(struct iwl_priv *priv)
 143 {
 144         struct iwl_rxon_context *ctx;
 145
 146         for_each_context(priv, ctx) {
 147                 iwlagn_set_rxon_chain(priv, ctx);
 148                 if (ctx->active.rx_chain != ctx->staging.rx_chain)
 149                         iwlagn_commit_rxon(priv, ctx);
 150         }
 151 }
 152
 153 /* Parse the beacon frame to find the TIM element and set tim_idx & tim_size */
 154 static void iwl_set_beacon_tim(struct iwl_priv *priv,
 155                                struct iwl_tx_beacon_cmd *tx_beacon_cmd,
 156                                u8 *beacon, u32 frame_size)
 157 {
 158         u16 tim_idx;
 159         struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)beacon;
 160
 161         /*
 162          * The index is relative to frame start but we start looking at the
 163          * variable-length part of the beacon.
 164          */
 165         tim_idx = mgmt->u.beacon.variable - beacon;
 166
 167         /* Parse variable-length elements of beacon to find WLAN_EID_TIM */
 168         while ((tim_idx < (frame_size - 2)) &&
 169                         (beacon[tim_idx] != WLAN_EID_TIM))
 170                 tim_idx += beacon[tim_idx+1] + 2;
 171
 172         /* If TIM field was found, set variables */
 173         if ((tim_idx < (frame_size - 1)) && (beacon[tim_idx] == WLAN_EID_TIM)) {
 174                 tx_beacon_cmd->tim_idx = cpu_to_le16(tim_idx);
 175                 tx_beacon_cmd->tim_size = beacon[tim_idx+1];
 176         } else
 177                 IWL_WARN(priv, "Unable to find TIM Element in beacon\n");
 178 }
 179
 180 int iwlagn_send_beacon_cmd(struct iwl_priv *priv)
 181 {
 182         struct iwl_tx_beacon_cmd *tx_beacon_cmd;
 183         struct iwl_host_cmd cmd = {
 184                 .id = REPLY_TX_BEACON,
 185         };
 186         struct ieee80211_tx_info *info;
 187         u32 frame_size;
 188         u32 rate_flags;
 189         u32 rate;
 190
 191         /*
 192          * We have to set up the TX command, the TX Beacon command, and the
 193          * beacon contents.
 194          */
 195
 196         lockdep_assert_held(&priv->mutex);
 197
 198         if (!priv->beacon_ctx) {
 199                 IWL_ERR(priv, "trying to build beacon w/o beacon context!\n");
 200                 return 0;
 201         }
 202
 203         if (WARN_ON(!priv->beacon_skb))
 204                 return -EINVAL;
 205
 206         /* Allocate beacon command */
 207         if (!priv->beacon_cmd)
 208                 priv->beacon_cmd = kzalloc(sizeof(*tx_beacon_cmd), GFP_KERNEL);
 209         tx_beacon_cmd = priv->beacon_cmd;
 210         if (!tx_beacon_cmd)
 211                 return -ENOMEM;
 212
 213         frame_size = priv->beacon_skb->len;
 214
 215         /* Set up TX command fields */
 216         tx_beacon_cmd->tx.len = cpu_to_le16((u16)frame_size);
 217         tx_beacon_cmd->tx.sta_id = priv->beacon_ctx->bcast_sta_id;
 218         tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
 219         tx_beacon_cmd->tx.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK |
 220                 TX_CMD_FLG_TSF_MSK | TX_CMD_FLG_STA_RATE_MSK;
 221
 222         /* Set up TX beacon command fields */
 223         iwl_set_beacon_tim(priv, tx_beacon_cmd, priv->beacon_skb->data,
 224                            frame_size);
 225
 226         /* Set up packet rate and flags */
 227         info = IEEE80211_SKB_CB(priv->beacon_skb);
 228
 229         /*
 230          * Let's set up the rate at least somewhat correctly;
 231          * it will currently not actually be used by the uCode,
 232          * it uses the broadcast station's rate instead.
 233          */
 234         if (info->control.rates[0].idx < 0 ||
 235             info->control.rates[0].flags & IEEE80211_TX_RC_MCS)
 236                 rate = 0;
 237         else
 238                 rate = info->control.rates[0].idx;
 239
 240         priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant,
 241                                               priv->nvm_data->valid_tx_ant);
 242         rate_flags = iwl_ant_idx_to_flags(priv->mgmt_tx_ant);
 243
 244         /* In mac80211, rates for 5 GHz start at 0 */
 245         if (info->band == NL80211_BAND_5GHZ)
 246                 rate += IWL_FIRST_OFDM_RATE;
 247         else if (rate >= IWL_FIRST_CCK_RATE && rate <= IWL_LAST_CCK_RATE)
 248                 rate_flags |= RATE_MCS_CCK_MSK;
 249
 250         tx_beacon_cmd->tx.rate_n_flags =
 251                         iwl_hw_set_rate_n_flags(rate, rate_flags);
 252
 253         /* Submit command */
 254         cmd.len[0] = sizeof(*tx_beacon_cmd);
 255         cmd.data[0] = tx_beacon_cmd;
 256         cmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY;
 257         cmd.len[1] = frame_size;
 258         cmd.data[1] = priv->beacon_skb->data;
 259         cmd.dataflags[1] = IWL_HCMD_DFL_NOCOPY;
 260
 261         return iwl_dvm_send_cmd(priv, &cmd);
 262 }
 263
 264 static void iwl_bg_beacon_update(struct work_struct *work)
 265 {
 266         struct iwl_priv *priv =
 267                 container_of(work, struct iwl_priv, beacon_update);
 268         struct sk_buff *beacon;
 269
 270         mutex_lock(&priv->mutex);
 271         if (!priv->beacon_ctx) {
 272                 IWL_ERR(priv, "updating beacon w/o beacon context!\n");
 273                 goto out;
 274         }
 275
 276         if (priv->beacon_ctx->vif->type != NL80211_IFTYPE_AP) {
 277                 /*
 278                  * The ucode will send beacon notifications even in
 279                  * IBSS mode, but we don't want to process them. But
 280                  * we need to defer the type check to here due to
 281                  * requiring locking around the beacon_ctx access.
 282                  */
 283                 goto out;
 284         }
 285
 286         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
 287         beacon = ieee80211_beacon_get(priv->hw, priv->beacon_ctx->vif, 0);
 288         if (!beacon) {
 289                 IWL_ERR(priv, "update beacon failed -- keeping old\n");
 290                 goto out;
 291         }
 292
 293         /* new beacon skb is allocated every time; dispose previous.*/
 294         dev_kfree_skb(priv->beacon_skb);
 295
 296         priv->beacon_skb = beacon;
 297
 298         iwlagn_send_beacon_cmd(priv);
 299  out:
 300         mutex_unlock(&priv->mutex);
 301 }
 302
 303 static void iwl_bg_bt_runtime_config(struct work_struct *work)
 304 {
 305         struct iwl_priv *priv =
 306                 container_of(work, struct iwl_priv, bt_runtime_config);
 307
 308         mutex_lock(&priv->mutex);
 309         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 310                 goto out;
 311
 312         /* dont send host command if rf-kill is on */
 313         if (!iwl_is_ready_rf(priv))
 314                 goto out;
 315
 316         iwlagn_send_advance_bt_config(priv);
 317 out:
 318         mutex_unlock(&priv->mutex);
 319 }
 320
 321 static void iwl_bg_bt_full_concurrency(struct work_struct *work)
 322 {
 323         struct iwl_priv *priv =
 324                 container_of(work, struct iwl_priv, bt_full_concurrency);
 325         struct iwl_rxon_context *ctx;
 326
 327         mutex_lock(&priv->mutex);
 328
 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         IWL_DEBUG_INFO(priv, "BT coex in %s mode\n",
 337                        priv->bt_full_concurrent ?
 338                        "full concurrency" : "3-wire");
 339
 340         /*
 341          * LQ & RXON updated cmds must be sent before BT Config cmd
 342          * to avoid 3-wire collisions
 343          */
 344         for_each_context(priv, ctx) {
 345                 iwlagn_set_rxon_chain(priv, ctx);
 346                 iwlagn_commit_rxon(priv, ctx);
 347         }
 348
 349         iwlagn_send_advance_bt_config(priv);
 350 out:
 351         mutex_unlock(&priv->mutex);
 352 }
 353
 354 int iwl_send_statistics_request(struct iwl_priv *priv, u8 flags, bool clear)
 355 {
 356         struct iwl_statistics_cmd statistics_cmd = {
 357                 .configuration_flags =
 358                         clear ? IWL_STATS_CONF_CLEAR_STATS : 0,
 359         };
 360
 361         if (flags & CMD_ASYNC)
 362                 return iwl_dvm_send_cmd_pdu(priv, REPLY_STATISTICS_CMD,
 363                                         CMD_ASYNC,
 364                                         sizeof(struct iwl_statistics_cmd),
 365                                         &statistics_cmd);
 366         else
 367                 return iwl_dvm_send_cmd_pdu(priv, REPLY_STATISTICS_CMD, 0,
 368                                         sizeof(struct iwl_statistics_cmd),
 369                                         &statistics_cmd);
 370 }
 371
 372 /*
 373  * iwl_bg_statistics_periodic - Timer callback to queue statistics
 374  *
 375  * This callback is provided in order to send a statistics request.
 376  *
 377  * This timer function is continually reset to execute within
 378  * REG_RECALIB_PERIOD seconds since the last STATISTICS_NOTIFICATION
 379  * was received.  We need to ensure we receive the statistics in order
 380  * to update the temperature used for calibrating the TXPOWER.
 381  */
 382 static void iwl_bg_statistics_periodic(struct timer_list *t)
 383 {
 384         struct iwl_priv *priv = from_timer(priv, t, statistics_periodic);
 385
 386         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 387                 return;
 388
 389         /* dont send host command if rf-kill is on */
 390         if (!iwl_is_ready_rf(priv))
 391                 return;
 392
 393         iwl_send_statistics_request(priv, CMD_ASYNC, false);
 394 }
 395
 396
 397 static void iwl_print_cont_event_trace(struct iwl_priv *priv, u32 base,
 398                                         u32 start_idx, u32 num_events,
 399                                         u32 capacity, u32 mode)
 400 {
 401         u32 i;
 402         u32 ptr;        /* SRAM byte address of log data */
 403         u32 ev, time, data; /* event log data */
 404
 405         if (mode == 0)
 406                 ptr = base + (4 * sizeof(u32)) + (start_idx * 2 * sizeof(u32));
 407         else
 408                 ptr = base + (4 * sizeof(u32)) + (start_idx * 3 * sizeof(u32));
 409
 410         /* Make sure device is powered up for SRAM reads */
 411         if (!iwl_trans_grab_nic_access(priv->trans))
 412                 return;
 413
 414         /* Set starting address; reads will auto-increment */
 415         iwl_write32(priv->trans, HBUS_TARG_MEM_RADDR, ptr);
 416
 417         /*
 418          * Refuse to read more than would have fit into the log from
 419          * the current start_idx. This used to happen due to the race
 420          * described below, but now WARN because the code below should
 421          * prevent it from happening here.
 422          */
 423         if (WARN_ON(num_events > capacity - start_idx))
 424                 num_events = capacity - start_idx;
 425
 426         /*
 427          * "time" is actually "data" for mode 0 (no timestamp).
 428          * place event id # at far right for easier visual parsing.
 429          */
 430         for (i = 0; i < num_events; i++) {
 431                 ev = iwl_read32(priv->trans, HBUS_TARG_MEM_RDAT);
 432                 time = iwl_read32(priv->trans, HBUS_TARG_MEM_RDAT);
 433                 if (mode == 0) {
 434                         trace_iwlwifi_dev_ucode_cont_event(
 435                                         priv->trans->dev, 0, time, ev);
 436                 } else {
 437                         data = iwl_read32(priv->trans, HBUS_TARG_MEM_RDAT);
 438                         trace_iwlwifi_dev_ucode_cont_event(
 439                                         priv->trans->dev, time, data, ev);
 440                 }
 441         }
 442         /* Allow device to power down */
 443         iwl_trans_release_nic_access(priv->trans);
 444 }
 445
 446 static void iwl_continuous_event_trace(struct iwl_priv *priv)
 447 {
 448         u32 capacity;   /* event log capacity in # entries */
 449         struct {
 450                 u32 capacity;
 451                 u32 mode;
 452                 u32 wrap_counter;
 453                 u32 write_counter;
 454         } __packed read;
 455         u32 base;       /* SRAM byte address of event log header */
 456         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
 457         u32 num_wraps;  /* # times uCode wrapped to top of log */
 458         u32 next_entry; /* index of next entry to be written by uCode */
 459
 460         base = priv->device_pointers.log_event_table;
 461         if (iwlagn_hw_valid_rtc_data_addr(base)) {
 462                 iwl_trans_read_mem_bytes(priv->trans, base,
 463                                          &read, sizeof(read));
 464                 capacity = read.capacity;
 465                 mode = read.mode;
 466                 num_wraps = read.wrap_counter;
 467                 next_entry = read.write_counter;
 468         } else
 469                 return;
 470
 471         /*
 472          * Unfortunately, the uCode doesn't use temporary variables.
 473          * Therefore, it can happen that we read next_entry == capacity,
 474          * which really means next_entry == 0.
 475          */
 476         if (unlikely(next_entry == capacity))
 477                 next_entry = 0;
 478         /*
 479          * Additionally, the uCode increases the write pointer before
 480          * the wraps counter, so if the write pointer is smaller than
 481          * the old write pointer (wrap occurred) but we read that no
 482          * wrap occurred, we actually read between the next_entry and
 483          * num_wraps update (this does happen in practice!!) -- take
 484          * that into account by increasing num_wraps.
 485          */
 486         if (unlikely(next_entry < priv->event_log.next_entry &&
 487                      num_wraps == priv->event_log.num_wraps))
 488                 num_wraps++;
 489
 490         if (num_wraps == priv->event_log.num_wraps) {
 491                 iwl_print_cont_event_trace(
 492                         priv, base, priv->event_log.next_entry,
 493                         next_entry - priv->event_log.next_entry,
 494                         capacity, mode);
 495
 496                 priv->event_log.non_wraps_count++;
 497         } else {
 498                 if (num_wraps - priv->event_log.num_wraps > 1)
 499                         priv->event_log.wraps_more_count++;
 500                 else
 501                         priv->event_log.wraps_once_count++;
 502
 503                 trace_iwlwifi_dev_ucode_wrap_event(priv->trans->dev,
 504                                 num_wraps - priv->event_log.num_wraps,
 505                                 next_entry, priv->event_log.next_entry);
 506
 507                 if (next_entry < priv->event_log.next_entry) {
 508                         iwl_print_cont_event_trace(
 509                                 priv, base, priv->event_log.next_entry,
 510                                 capacity - priv->event_log.next_entry,
 511                                 capacity, mode);
 512
 513                         iwl_print_cont_event_trace(
 514                                 priv, base, 0, next_entry, capacity, mode);
 515                 } else {
 516                         iwl_print_cont_event_trace(
 517                                 priv, base, next_entry,
 518                                 capacity - next_entry,
 519                                 capacity, mode);
 520
 521                         iwl_print_cont_event_trace(
 522                                 priv, base, 0, next_entry, capacity, mode);
 523                 }
 524         }
 525
 526         priv->event_log.num_wraps = num_wraps;
 527         priv->event_log.next_entry = next_entry;
 528 }
 529
 530 /*
 531  * iwl_bg_ucode_trace - Timer callback to log ucode event
 532  *
 533  * The timer is continually set to execute every
 534  * UCODE_TRACE_PERIOD milliseconds after the last timer expired
 535  * this function is to perform continuous uCode event logging operation
 536  * if enabled
 537  */
 538 static void iwl_bg_ucode_trace(struct timer_list *t)
 539 {
 540         struct iwl_priv *priv = from_timer(priv, t, ucode_trace);
 541
 542         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 543                 return;
 544
 545         if (priv->event_log.ucode_trace) {
 546                 iwl_continuous_event_trace(priv);
 547                 /* Reschedule the timer to occur in UCODE_TRACE_PERIOD */
 548                 mod_timer(&priv->ucode_trace,
 549                          jiffies + msecs_to_jiffies(UCODE_TRACE_PERIOD));
 550         }
 551 }
 552
 553 static void iwl_bg_tx_flush(struct work_struct *work)
 554 {
 555         struct iwl_priv *priv =
 556                 container_of(work, struct iwl_priv, tx_flush);
 557
 558         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 559                 return;
 560
 561         /* do nothing if rf-kill is on */
 562         if (!iwl_is_ready_rf(priv))
 563                 return;
 564
 565         IWL_DEBUG_INFO(priv, "device request: flush all tx frames\n");
 566         iwlagn_dev_txfifo_flush(priv);
 567 }
 568
 569 /*
 570  * queue/FIFO/AC mapping definitions
 571  */
 572
 573 static const u8 iwlagn_bss_ac_to_fifo[] = {
 574         IWL_TX_FIFO_VO,
 575         IWL_TX_FIFO_VI,
 576         IWL_TX_FIFO_BE,
 577         IWL_TX_FIFO_BK,
 578 };
 579
 580 static const u8 iwlagn_bss_ac_to_queue[] = {
 581         0, 1, 2, 3,
 582 };
 583
 584 static const u8 iwlagn_pan_ac_to_fifo[] = {
 585         IWL_TX_FIFO_VO_IPAN,
 586         IWL_TX_FIFO_VI_IPAN,
 587         IWL_TX_FIFO_BE_IPAN,
 588         IWL_TX_FIFO_BK_IPAN,
 589 };
 590
 591 static const u8 iwlagn_pan_ac_to_queue[] = {
 592         7, 6, 5, 4,
 593 };
 594
 595 static void iwl_init_context(struct iwl_priv *priv, u32 ucode_flags)
 596 {
 597         int i;
 598
 599         /*
 600          * The default context is always valid,
 601          * the PAN context depends on uCode.
 602          */
 603         priv->valid_contexts = BIT(IWL_RXON_CTX_BSS);
 604         if (ucode_flags & IWL_UCODE_TLV_FLAGS_PAN)
 605                 priv->valid_contexts |= BIT(IWL_RXON_CTX_PAN);
 606
 607         for (i = 0; i < NUM_IWL_RXON_CTX; i++)
 608                 priv->contexts[i].ctxid = i;
 609
 610         priv->contexts[IWL_RXON_CTX_BSS].always_active = true;
 611         priv->contexts[IWL_RXON_CTX_BSS].is_active = true;
 612         priv->contexts[IWL_RXON_CTX_BSS].rxon_cmd = REPLY_RXON;
 613         priv->contexts[IWL_RXON_CTX_BSS].rxon_timing_cmd = REPLY_RXON_TIMING;
 614         priv->contexts[IWL_RXON_CTX_BSS].rxon_assoc_cmd = REPLY_RXON_ASSOC;
 615         priv->contexts[IWL_RXON_CTX_BSS].qos_cmd = REPLY_QOS_PARAM;
 616         priv->contexts[IWL_RXON_CTX_BSS].ap_sta_id = IWL_AP_ID;
 617         priv->contexts[IWL_RXON_CTX_BSS].wep_key_cmd = REPLY_WEPKEY;
 618         priv->contexts[IWL_RXON_CTX_BSS].bcast_sta_id = IWLAGN_BROADCAST_ID;
 619         priv->contexts[IWL_RXON_CTX_BSS].exclusive_interface_modes =
 620                 BIT(NL80211_IFTYPE_ADHOC) | BIT(NL80211_IFTYPE_MONITOR);
 621         priv->contexts[IWL_RXON_CTX_BSS].interface_modes =
 622                 BIT(NL80211_IFTYPE_STATION);
 623         priv->contexts[IWL_RXON_CTX_BSS].ap_devtype = RXON_DEV_TYPE_AP;
 624         priv->contexts[IWL_RXON_CTX_BSS].ibss_devtype = RXON_DEV_TYPE_IBSS;
 625         priv->contexts[IWL_RXON_CTX_BSS].station_devtype = RXON_DEV_TYPE_ESS;
 626         priv->contexts[IWL_RXON_CTX_BSS].unused_devtype = RXON_DEV_TYPE_ESS;
 627         memcpy(priv->contexts[IWL_RXON_CTX_BSS].ac_to_queue,
 628                iwlagn_bss_ac_to_queue, sizeof(iwlagn_bss_ac_to_queue));
 629         memcpy(priv->contexts[IWL_RXON_CTX_BSS].ac_to_fifo,
 630                iwlagn_bss_ac_to_fifo, sizeof(iwlagn_bss_ac_to_fifo));
 631
 632         priv->contexts[IWL_RXON_CTX_PAN].rxon_cmd = REPLY_WIPAN_RXON;
 633         priv->contexts[IWL_RXON_CTX_PAN].rxon_timing_cmd =
 634                 REPLY_WIPAN_RXON_TIMING;
 635         priv->contexts[IWL_RXON_CTX_PAN].rxon_assoc_cmd =
 636                 REPLY_WIPAN_RXON_ASSOC;
 637         priv->contexts[IWL_RXON_CTX_PAN].qos_cmd = REPLY_WIPAN_QOS_PARAM;
 638         priv->contexts[IWL_RXON_CTX_PAN].ap_sta_id = IWL_AP_ID_PAN;
 639         priv->contexts[IWL_RXON_CTX_PAN].wep_key_cmd = REPLY_WIPAN_WEPKEY;
 640         priv->contexts[IWL_RXON_CTX_PAN].bcast_sta_id = IWLAGN_PAN_BCAST_ID;
 641         priv->contexts[IWL_RXON_CTX_PAN].station_flags = STA_FLG_PAN_STATION;
 642         priv->contexts[IWL_RXON_CTX_PAN].interface_modes =
 643                 BIT(NL80211_IFTYPE_STATION) | BIT(NL80211_IFTYPE_AP);
 644
 645         priv->contexts[IWL_RXON_CTX_PAN].ap_devtype = RXON_DEV_TYPE_CP;
 646         priv->contexts[IWL_RXON_CTX_PAN].station_devtype = RXON_DEV_TYPE_2STA;
 647         priv->contexts[IWL_RXON_CTX_PAN].unused_devtype = RXON_DEV_TYPE_P2P;
 648         memcpy(priv->contexts[IWL_RXON_CTX_PAN].ac_to_queue,
 649                iwlagn_pan_ac_to_queue, sizeof(iwlagn_pan_ac_to_queue));
 650         memcpy(priv->contexts[IWL_RXON_CTX_PAN].ac_to_fifo,
 651                iwlagn_pan_ac_to_fifo, sizeof(iwlagn_pan_ac_to_fifo));
 652         priv->contexts[IWL_RXON_CTX_PAN].mcast_queue = IWL_IPAN_MCAST_QUEUE;
 653
 654         BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
 655 }
 656
 657 static void iwl_rf_kill_ct_config(struct iwl_priv *priv)
 658 {
 659         struct iwl_ct_kill_config cmd;
 660         struct iwl_ct_kill_throttling_config adv_cmd;
 661         int ret = 0;
 662
 663         iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_CLR,
 664                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
 665
 666         priv->thermal_throttle.ct_kill_toggle = false;
 667
 668         if (priv->lib->support_ct_kill_exit) {
 669                 adv_cmd.critical_temperature_enter =
 670                         cpu_to_le32(priv->hw_params.ct_kill_threshold);
 671                 adv_cmd.critical_temperature_exit =
 672                         cpu_to_le32(priv->hw_params.ct_kill_exit_threshold);
 673
 674                 ret = iwl_dvm_send_cmd_pdu(priv,
 675                                        REPLY_CT_KILL_CONFIG_CMD,
 676                                        0, sizeof(adv_cmd), &adv_cmd);
 677                 if (ret)
 678                         IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
 679                 else
 680                         IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
 681                                 "succeeded, critical temperature enter is %d,"
 682                                 "exit is %d\n",
 683                                 priv->hw_params.ct_kill_threshold,
 684                                 priv->hw_params.ct_kill_exit_threshold);
 685         } else {
 686                 cmd.critical_temperature_R =
 687                         cpu_to_le32(priv->hw_params.ct_kill_threshold);
 688
 689                 ret = iwl_dvm_send_cmd_pdu(priv,
 690                                        REPLY_CT_KILL_CONFIG_CMD,
 691                                        0, sizeof(cmd), &cmd);
 692                 if (ret)
 693                         IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
 694                 else
 695                         IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
 696                                 "succeeded, "
 697                                 "critical temperature is %d\n",
 698                                 priv->hw_params.ct_kill_threshold);
 699         }
 700 }
 701
 702 static int iwlagn_send_calib_cfg_rt(struct iwl_priv *priv, u32 cfg)
 703 {
 704         struct iwl_calib_cfg_cmd calib_cfg_cmd;
 705         struct iwl_host_cmd cmd = {
 706                 .id = CALIBRATION_CFG_CMD,
 707                 .len = { sizeof(struct iwl_calib_cfg_cmd), },
 708                 .data = { &calib_cfg_cmd, },
 709         };
 710
 711         memset(&calib_cfg_cmd, 0, sizeof(calib_cfg_cmd));
 712         calib_cfg_cmd.ucd_calib_cfg.once.is_enable = IWL_CALIB_RT_CFG_ALL;
 713         calib_cfg_cmd.ucd_calib_cfg.once.start = cpu_to_le32(cfg);
 714
 715         return iwl_dvm_send_cmd(priv, &cmd);
 716 }
 717
 718
 719 static int iwlagn_send_tx_ant_config(struct iwl_priv *priv, u8 valid_tx_ant)
 720 {
 721         struct iwl_tx_ant_config_cmd tx_ant_cmd = {
 722           .valid = cpu_to_le32(valid_tx_ant),
 723         };
 724
 725         if (IWL_UCODE_API(priv->fw->ucode_ver) > 1) {
 726                 IWL_DEBUG_HC(priv, "select valid tx ant: %u\n", valid_tx_ant);
 727                 return iwl_dvm_send_cmd_pdu(priv, TX_ANT_CONFIGURATION_CMD, 0,
 728                                         sizeof(struct iwl_tx_ant_config_cmd),
 729                                         &tx_ant_cmd);
 730         } else {
 731                 IWL_DEBUG_HC(priv, "TX_ANT_CONFIGURATION_CMD not supported\n");
 732                 return -EOPNOTSUPP;
 733         }
 734 }
 735
 736 static void iwl_send_bt_config(struct iwl_priv *priv)
 737 {
 738         struct iwl_bt_cmd bt_cmd = {
 739                 .lead_time = BT_LEAD_TIME_DEF,
 740                 .max_kill = BT_MAX_KILL_DEF,
 741                 .kill_ack_mask = 0,
 742                 .kill_cts_mask = 0,
 743         };
 744
 745         if (!iwlwifi_mod_params.bt_coex_active)
 746                 bt_cmd.flags = BT_COEX_DISABLE;
 747         else
 748                 bt_cmd.flags = BT_COEX_ENABLE;
 749
 750         priv->bt_enable_flag = bt_cmd.flags;
 751         IWL_DEBUG_INFO(priv, "BT coex %s\n",
 752                 (bt_cmd.flags == BT_COEX_DISABLE) ? "disable" : "active");
 753
 754         if (iwl_dvm_send_cmd_pdu(priv, REPLY_BT_CONFIG,
 755                              0, sizeof(struct iwl_bt_cmd), &bt_cmd))
 756                 IWL_ERR(priv, "failed to send BT Coex Config\n");
 757 }
 758
 759 /*
 760  * iwl_alive_start - called after REPLY_ALIVE notification received
 761  *                   from protocol/runtime uCode (initialization uCode's
 762  *                   Alive gets handled by iwl_init_alive_start()).
 763  */
 764 int iwl_alive_start(struct iwl_priv *priv)
 765 {
 766         int ret = 0;
 767         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 768
 769         IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
 770
 771         /* After the ALIVE response, we can send host commands to the uCode */
 772         set_bit(STATUS_ALIVE, &priv->status);
 773
 774         if (iwl_is_rfkill(priv))
 775                 return -ERFKILL;
 776
 777         if (priv->event_log.ucode_trace) {
 778                 /* start collecting data now */
 779                 mod_timer(&priv->ucode_trace, jiffies);
 780         }
 781
 782         /* download priority table before any calibration request */
 783         if (priv->lib->bt_params &&
 784             priv->lib->bt_params->advanced_bt_coexist) {
 785                 /* Configure Bluetooth device coexistence support */
 786                 if (priv->lib->bt_params->bt_sco_disable)
 787                         priv->bt_enable_pspoll = false;
 788                 else
 789                         priv->bt_enable_pspoll = true;
 790
 791                 priv->bt_valid = IWLAGN_BT_ALL_VALID_MSK;
 792                 priv->kill_ack_mask = IWLAGN_BT_KILL_ACK_MASK_DEFAULT;
 793                 priv->kill_cts_mask = IWLAGN_BT_KILL_CTS_MASK_DEFAULT;
 794                 iwlagn_send_advance_bt_config(priv);
 795                 priv->bt_valid = IWLAGN_BT_VALID_ENABLE_FLAGS;
 796                 priv->cur_rssi_ctx = NULL;
 797
 798                 iwl_send_prio_tbl(priv);
 799
 800                 /* FIXME: w/a to force change uCode BT state machine */
 801                 ret = iwl_send_bt_env(priv, IWL_BT_COEX_ENV_OPEN,
 802                                          BT_COEX_PRIO_TBL_EVT_INIT_CALIB2);
 803                 if (ret)
 804                         return ret;
 805                 ret = iwl_send_bt_env(priv, IWL_BT_COEX_ENV_CLOSE,
 806                                          BT_COEX_PRIO_TBL_EVT_INIT_CALIB2);
 807                 if (ret)
 808                         return ret;
 809         } else if (priv->lib->bt_params) {
 810                 /*
 811                  * default is 2-wire BT coexexistence support
 812                  */
 813                 iwl_send_bt_config(priv);
 814         }
 815
 816         /*
 817          * Perform runtime calibrations, including DC calibration.
 818          */
 819         iwlagn_send_calib_cfg_rt(priv, IWL_CALIB_CFG_DC_IDX);
 820
 821         ieee80211_wake_queues(priv->hw);
 822
 823         /* Configure Tx antenna selection based on H/W config */
 824         iwlagn_send_tx_ant_config(priv, priv->nvm_data->valid_tx_ant);
 825
 826         if (iwl_is_associated_ctx(ctx) && !priv->wowlan) {
 827                 struct iwl_rxon_cmd *active_rxon =
 828                                 (struct iwl_rxon_cmd *)&ctx->active;
 829                 /* apply any changes in staging */
 830                 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
 831                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
 832         } else {
 833                 struct iwl_rxon_context *tmp;
 834                 /* Initialize our rx_config data */
 835                 for_each_context(priv, tmp)
 836                         iwl_connection_init_rx_config(priv, tmp);
 837
 838                 iwlagn_set_rxon_chain(priv, ctx);
 839         }
 840
 841         if (!priv->wowlan) {
 842                 /* WoWLAN ucode will not reply in the same way, skip it */
 843                 iwl_reset_run_time_calib(priv);
 844         }
 845
 846         set_bit(STATUS_READY, &priv->status);
 847
 848         /* Configure the adapter for unassociated operation */
 849         ret = iwlagn_commit_rxon(priv, ctx);
 850         if (ret)
 851                 return ret;
 852
 853         /* At this point, the NIC is initialized and operational */
 854         iwl_rf_kill_ct_config(priv);
 855
 856         IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
 857
 858         return iwl_power_update_mode(priv, true);
 859 }
 860
 861 /**
 862  * iwl_clear_driver_stations - clear knowledge of all stations from driver
 863  * @priv: iwl priv struct
 864  *
 865  * This is called during iwl_down() to make sure that in the case
 866  * we're coming there from a hardware restart mac80211 will be
 867  * able to reconfigure stations -- if we're getting there in the
 868  * normal down flow then the stations will already be cleared.
 869  */
 870 static void iwl_clear_driver_stations(struct iwl_priv *priv)
 871 {
 872         struct iwl_rxon_context *ctx;
 873
 874         spin_lock_bh(&priv->sta_lock);
 875         memset(priv->stations, 0, sizeof(priv->stations));
 876         priv->num_stations = 0;
 877
 878         priv->ucode_key_table = 0;
 879
 880         for_each_context(priv, ctx) {
 881                 /*
 882                  * Remove all key information that is not stored as part
 883                  * of station information since mac80211 may not have had
 884                  * a chance to remove all the keys. When device is
 885                  * reconfigured by mac80211 after an error all keys will
 886                  * be reconfigured.
 887                  */
 888                 memset(ctx->wep_keys, 0, sizeof(ctx->wep_keys));
 889                 ctx->key_mapping_keys = 0;
 890         }
 891
 892         spin_unlock_bh(&priv->sta_lock);
 893 }
 894
 895 void iwl_down(struct iwl_priv *priv)
 896 {
 897         int exit_pending;
 898
 899         IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
 900
 901         lockdep_assert_held(&priv->mutex);
 902
 903         iwl_scan_cancel_timeout(priv, 200);
 904
 905         exit_pending =
 906                 test_and_set_bit(STATUS_EXIT_PENDING, &priv->status);
 907
 908         iwl_clear_ucode_stations(priv, NULL);
 909         iwl_dealloc_bcast_stations(priv);
 910         iwl_clear_driver_stations(priv);
 911
 912         /* reset BT coex data */
 913         priv->bt_status = 0;
 914         priv->cur_rssi_ctx = NULL;
 915         priv->bt_is_sco = 0;
 916         if (priv->lib->bt_params)
 917                 priv->bt_traffic_load =
 918                          priv->lib->bt_params->bt_init_traffic_load;
 919         else
 920                 priv->bt_traffic_load = 0;
 921         priv->bt_full_concurrent = false;
 922         priv->bt_ci_compliance = 0;
 923
 924         /* Wipe out the EXIT_PENDING status bit if we are not actually
 925          * exiting the module */
 926         if (!exit_pending)
 927                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
 928
 929         if (priv->mac80211_registered)
 930                 ieee80211_stop_queues(priv->hw);
 931
 932         priv->ucode_loaded = false;
 933         iwl_trans_stop_device(priv->trans);
 934
 935         /* Set num_aux_in_flight must be done after the transport is stopped */
 936         atomic_set(&priv->num_aux_in_flight, 0);
 937
 938         /* Clear out all status bits but a few that are stable across reset */
 939         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
 940                                 STATUS_RF_KILL_HW |
 941                         test_bit(STATUS_FW_ERROR, &priv->status) <<
 942                                 STATUS_FW_ERROR |
 943                         test_bit(STATUS_EXIT_PENDING, &priv->status) <<
 944                                 STATUS_EXIT_PENDING;
 945
 946         dev_kfree_skb(priv->beacon_skb);
 947         priv->beacon_skb = NULL;
 948 }
 949
 950 /*****************************************************************************
 951  *
 952  * Workqueue callbacks
 953  *
 954  *****************************************************************************/
 955
 956 static void iwl_bg_run_time_calib_work(struct work_struct *work)
 957 {
 958         struct iwl_priv *priv = container_of(work, struct iwl_priv,
 959                         run_time_calib_work);
 960
 961         mutex_lock(&priv->mutex);
 962
 963         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
 964             test_bit(STATUS_SCANNING, &priv->status)) {
 965                 mutex_unlock(&priv->mutex);
 966                 return;
 967         }
 968
 969         if (priv->start_calib) {
 970                 iwl_chain_noise_calibration(priv);
 971                 iwl_sensitivity_calibration(priv);
 972         }
 973
 974         mutex_unlock(&priv->mutex);
 975 }
 976
 977 void iwlagn_prepare_restart(struct iwl_priv *priv)
 978 {
 979         bool bt_full_concurrent;
 980         u8 bt_ci_compliance;
 981         u8 bt_load;
 982         u8 bt_status;
 983         bool bt_is_sco;
 984         int i;
 985
 986         lockdep_assert_held(&priv->mutex);
 987
 988         priv->is_open = 0;
 989
 990         /*
 991          * __iwl_down() will clear the BT status variables,
 992          * which is correct, but when we restart we really
 993          * want to keep them so restore them afterwards.
 994          *
 995          * The restart process will later pick them up and
 996          * re-configure the hw when we reconfigure the BT
 997          * command.
 998          */
 999         bt_full_concurrent = priv->bt_full_concurrent;
1000         bt_ci_compliance = priv->bt_ci_compliance;
1001         bt_load = priv->bt_traffic_load;
1002         bt_status = priv->bt_status;
1003         bt_is_sco = priv->bt_is_sco;
1004
1005         iwl_down(priv);
1006
1007         priv->bt_full_concurrent = bt_full_concurrent;
1008         priv->bt_ci_compliance = bt_ci_compliance;
1009         priv->bt_traffic_load = bt_load;
1010         priv->bt_status = bt_status;
1011         priv->bt_is_sco = bt_is_sco;
1012
1013         /* reset aggregation queues */
1014         for (i = IWLAGN_FIRST_AMPDU_QUEUE; i < IWL_MAX_HW_QUEUES; i++)
1015                 priv->queue_to_mac80211[i] = IWL_INVALID_MAC80211_QUEUE;
1016         /* and stop counts */
1017         for (i = 0; i < IWL_MAX_HW_QUEUES; i++)
1018                 atomic_set(&priv->queue_stop_count[i], 0);
1019
1020         memset(priv->agg_q_alloc, 0, sizeof(priv->agg_q_alloc));
1021 }
1022
1023 static void iwl_bg_restart(struct work_struct *data)
1024 {
1025         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
1026
1027         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1028                 return;
1029
1030         if (test_and_clear_bit(STATUS_FW_ERROR, &priv->status)) {
1031                 mutex_lock(&priv->mutex);
1032                 iwlagn_prepare_restart(priv);
1033                 mutex_unlock(&priv->mutex);
1034                 iwl_cancel_deferred_work(priv);
1035                 if (priv->mac80211_registered)
1036                         ieee80211_restart_hw(priv->hw);
1037                 else
1038                         IWL_ERR(priv,
1039                                 "Cannot request restart before registering with mac80211\n");
1040         } else {
1041                 WARN_ON(1);
1042         }
1043 }
1044
1045 /*****************************************************************************
1046  *
1047  * driver setup and teardown
1048  *
1049  *****************************************************************************/
1050
1051 static void iwl_setup_deferred_work(struct iwl_priv *priv)
1052 {
1053         priv->workqueue = alloc_ordered_workqueue(DRV_NAME, 0);
1054
1055         INIT_WORK(&priv->restart, iwl_bg_restart);
1056         INIT_WORK(&priv->beacon_update, iwl_bg_beacon_update);
1057         INIT_WORK(&priv->run_time_calib_work, iwl_bg_run_time_calib_work);
1058         INIT_WORK(&priv->tx_flush, iwl_bg_tx_flush);
1059         INIT_WORK(&priv->bt_full_concurrency, iwl_bg_bt_full_concurrency);
1060         INIT_WORK(&priv->bt_runtime_config, iwl_bg_bt_runtime_config);
1061
1062         iwl_setup_scan_deferred_work(priv);
1063
1064         if (priv->lib->bt_params)
1065                 iwlagn_bt_setup_deferred_work(priv);
1066
1067         timer_setup(&priv->statistics_periodic, iwl_bg_statistics_periodic, 0);
1068
1069         timer_setup(&priv->ucode_trace, iwl_bg_ucode_trace, 0);
1070 }
1071
1072 void iwl_cancel_deferred_work(struct iwl_priv *priv)
1073 {
1074         if (priv->lib->bt_params)
1075                 iwlagn_bt_cancel_deferred_work(priv);
1076
1077         cancel_work_sync(&priv->run_time_calib_work);
1078         cancel_work_sync(&priv->beacon_update);
1079
1080         iwl_cancel_scan_deferred_work(priv);
1081
1082         cancel_work_sync(&priv->bt_full_concurrency);
1083         cancel_work_sync(&priv->bt_runtime_config);
1084
1085         del_timer_sync(&priv->statistics_periodic);
1086         del_timer_sync(&priv->ucode_trace);
1087 }
1088
1089 static int iwl_init_drv(struct iwl_priv *priv)
1090 {
1091         spin_lock_init(&priv->sta_lock);
1092
1093         mutex_init(&priv->mutex);
1094
1095         INIT_LIST_HEAD(&priv->calib_results);
1096
1097         priv->band = NL80211_BAND_2GHZ;
1098
1099         priv->plcp_delta_threshold = priv->lib->plcp_delta_threshold;
1100
1101         priv->iw_mode = NL80211_IFTYPE_STATION;
1102         priv->current_ht_config.smps = IEEE80211_SMPS_STATIC;
1103         priv->missed_beacon_threshold = IWL_MISSED_BEACON_THRESHOLD_DEF;
1104         priv->agg_tids_count = 0;
1105
1106         priv->rx_statistics_jiffies = jiffies;
1107
1108         /* Choose which receivers/antennas to use */
1109         iwlagn_set_rxon_chain(priv, &priv->contexts[IWL_RXON_CTX_BSS]);
1110
1111         iwl_init_scan_params(priv);
1112
1113         /* init bt coex */
1114         if (priv->lib->bt_params &&
1115             priv->lib->bt_params->advanced_bt_coexist) {
1116                 priv->kill_ack_mask = IWLAGN_BT_KILL_ACK_MASK_DEFAULT;
1117                 priv->kill_cts_mask = IWLAGN_BT_KILL_CTS_MASK_DEFAULT;
1118                 priv->bt_valid = IWLAGN_BT_ALL_VALID_MSK;
1119                 priv->bt_on_thresh = BT_ON_THRESHOLD_DEF;
1120                 priv->bt_duration = BT_DURATION_LIMIT_DEF;
1121                 priv->dynamic_frag_thresh = BT_FRAG_THRESHOLD_DEF;
1122         }
1123
1124         return 0;
1125 }
1126
1127 static void iwl_uninit_drv(struct iwl_priv *priv)
1128 {
1129         kfree(priv->scan_cmd);
1130         kfree(priv->beacon_cmd);
1131         kfree(rcu_dereference_raw(priv->noa_data));
1132         iwl_calib_free_results(priv);
1133 #ifdef CONFIG_IWLWIFI_DEBUGFS
1134         kfree(priv->wowlan_sram);
1135 #endif
1136 }
1137
1138 static void iwl_set_hw_params(struct iwl_priv *priv)
1139 {
1140         if (priv->cfg->ht_params)
1141                 priv->hw_params.use_rts_for_aggregation =
1142                         priv->cfg->ht_params->use_rts_for_aggregation;
1143
1144         /* Device-specific setup */
1145         priv->lib->set_hw_params(priv);
1146 }
1147
1148
1149
1150 /* show what optional capabilities we have */
1151 static void iwl_option_config(struct iwl_priv *priv)
1152 {
1153 #ifdef CONFIG_IWLWIFI_DEBUG
1154         IWL_INFO(priv, "CONFIG_IWLWIFI_DEBUG enabled\n");
1155 #else
1156         IWL_INFO(priv, "CONFIG_IWLWIFI_DEBUG disabled\n");
1157 #endif
1158
1159 #ifdef CONFIG_IWLWIFI_DEBUGFS
1160         IWL_INFO(priv, "CONFIG_IWLWIFI_DEBUGFS enabled\n");
1161 #else
1162         IWL_INFO(priv, "CONFIG_IWLWIFI_DEBUGFS disabled\n");
1163 #endif
1164
1165 #ifdef CONFIG_IWLWIFI_DEVICE_TRACING
1166         IWL_INFO(priv, "CONFIG_IWLWIFI_DEVICE_TRACING enabled\n");
1167 #else
1168         IWL_INFO(priv, "CONFIG_IWLWIFI_DEVICE_TRACING disabled\n");
1169 #endif
1170 }
1171
1172 static int iwl_eeprom_init_hw_params(struct iwl_priv *priv)
1173 {
1174         struct iwl_nvm_data *data = priv->nvm_data;
1175
1176         if (data->sku_cap_11n_enable &&
1177             !priv->cfg->ht_params) {
1178                 IWL_ERR(priv, "Invalid 11n configuration\n");
1179                 return -EINVAL;
1180         }
1181
1182         if (!data->sku_cap_11n_enable && !data->sku_cap_band_24ghz_enable &&
1183             !data->sku_cap_band_52ghz_enable) {
1184                 IWL_ERR(priv, "Invalid device sku\n");
1185                 return -EINVAL;
1186         }
1187
1188         IWL_DEBUG_INFO(priv,
1189                        "Device SKU: 24GHz %s %s, 52GHz %s %s, 11.n %s %s\n",
1190                        data->sku_cap_band_24ghz_enable ? "" : "NOT", "enabled",
1191                        data->sku_cap_band_52ghz_enable ? "" : "NOT", "enabled",
1192                        data->sku_cap_11n_enable ? "" : "NOT", "enabled");
1193
1194         priv->hw_params.tx_chains_num =
1195                 num_of_ant(data->valid_tx_ant);
1196         if (priv->cfg->rx_with_siso_diversity)
1197                 priv->hw_params.rx_chains_num = 1;
1198         else
1199                 priv->hw_params.rx_chains_num =
1200                         num_of_ant(data->valid_rx_ant);
1201
1202         IWL_DEBUG_INFO(priv, "Valid Tx ant: 0x%X, Valid Rx ant: 0x%X\n",
1203                        data->valid_tx_ant,
1204                        data->valid_rx_ant);
1205
1206         return 0;
1207 }
1208
1209 static int iwl_nvm_check_version(struct iwl_nvm_data *data,
1210                                  struct iwl_trans *trans)
1211 {
1212         if (data->nvm_version >= trans->cfg->nvm_ver ||
1213             data->calib_version >= trans->cfg->nvm_calib_ver) {
1214                 IWL_DEBUG_INFO(trans, "device EEPROM VER=0x%x, CALIB=0x%x\n",
1215                                data->nvm_version, data->calib_version);
1216                 return 0;
1217         }
1218
1219         IWL_ERR(trans,
1220                 "Unsupported (too old) EEPROM VER=0x%x < 0x%x CALIB=0x%x < 0x%x\n",
1221                 data->nvm_version, trans->cfg->nvm_ver,
1222                 data->calib_version,  trans->cfg->nvm_calib_ver);
1223         return -EINVAL;
1224 }
1225
1226 static struct iwl_op_mode *iwl_op_mode_dvm_start(struct iwl_trans *trans,
1227                                                  const struct iwl_cfg *cfg,
1228                                                  const struct iwl_fw *fw,
1229                                                  struct dentry *dbgfs_dir)
1230 {
1231         struct iwl_priv *priv;
1232         struct ieee80211_hw *hw;
1233         struct iwl_op_mode *op_mode;
1234         u16 num_mac;
1235         u32 ucode_flags;
1236         struct iwl_trans_config trans_cfg = {};
1237         static const u8 no_reclaim_cmds[] = {
1238                 REPLY_RX_PHY_CMD,
1239                 REPLY_RX_MPDU_CMD,
1240                 REPLY_COMPRESSED_BA,
1241                 STATISTICS_NOTIFICATION,
1242                 REPLY_TX,
1243         };
1244         int i, err;
1245
1246         /************************
1247          * 1. Allocating HW data
1248          ************************/
1249         hw = iwl_alloc_all();
1250         if (!hw) {
1251                 pr_err("%s: Cannot allocate network device\n", trans->name);
1252                 err = -ENOMEM;
1253                 goto out;
1254         }
1255
1256         op_mode = hw->priv;
1257         op_mode->ops = &iwl_dvm_ops;
1258         priv = IWL_OP_MODE_GET_DVM(op_mode);
1259         priv->trans = trans;
1260         priv->dev = trans->dev;
1261         priv->cfg = cfg;
1262         priv->fw = fw;
1263
1264         switch (priv->trans->trans_cfg->device_family) {
1265         case IWL_DEVICE_FAMILY_1000:
1266         case IWL_DEVICE_FAMILY_100:
1267                 priv->lib = &iwl_dvm_1000_cfg;
1268                 break;
1269         case IWL_DEVICE_FAMILY_2000:
1270                 priv->lib = &iwl_dvm_2000_cfg;
1271                 break;
1272         case IWL_DEVICE_FAMILY_105:
1273                 priv->lib = &iwl_dvm_105_cfg;
1274                 break;
1275         case IWL_DEVICE_FAMILY_2030:
1276         case IWL_DEVICE_FAMILY_135:
1277                 priv->lib = &iwl_dvm_2030_cfg;
1278                 break;
1279         case IWL_DEVICE_FAMILY_5000:
1280                 priv->lib = &iwl_dvm_5000_cfg;
1281                 break;
1282         case IWL_DEVICE_FAMILY_5150:
1283                 priv->lib = &iwl_dvm_5150_cfg;
1284                 break;
1285         case IWL_DEVICE_FAMILY_6000:
1286         case IWL_DEVICE_FAMILY_6000i:
1287                 priv->lib = &iwl_dvm_6000_cfg;
1288                 break;
1289         case IWL_DEVICE_FAMILY_6005:
1290                 priv->lib = &iwl_dvm_6005_cfg;
1291                 break;
1292         case IWL_DEVICE_FAMILY_6050:
1293         case IWL_DEVICE_FAMILY_6150:
1294                 priv->lib = &iwl_dvm_6050_cfg;
1295                 break;
1296         case IWL_DEVICE_FAMILY_6030:
1297                 priv->lib = &iwl_dvm_6030_cfg;
1298                 break;
1299         default:
1300                 break;
1301         }
1302
1303         if (WARN_ON(!priv->lib)) {
1304                 err = -ENODEV;
1305                 goto out_free_hw;
1306         }
1307
1308         /*
1309          * Populate the state variables that the transport layer needs
1310          * to know about.
1311          */
1312         trans_cfg.op_mode = op_mode;
1313         trans_cfg.no_reclaim_cmds = no_reclaim_cmds;
1314         trans_cfg.n_no_reclaim_cmds = ARRAY_SIZE(no_reclaim_cmds);
1315
1316         switch (iwlwifi_mod_params.amsdu_size) {
1317         case IWL_AMSDU_DEF:
1318         case IWL_AMSDU_4K:
1319                 trans_cfg.rx_buf_size = IWL_AMSDU_4K;
1320                 break;
1321         case IWL_AMSDU_8K:
1322                 trans_cfg.rx_buf_size = IWL_AMSDU_8K;
1323                 break;
1324         case IWL_AMSDU_12K:
1325         default:
1326                 trans_cfg.rx_buf_size = IWL_AMSDU_4K;
1327                 pr_err("Unsupported amsdu_size: %d\n",
1328                        iwlwifi_mod_params.amsdu_size);
1329         }
1330
1331         trans_cfg.command_groups = iwl_dvm_groups;
1332         trans_cfg.command_groups_size = ARRAY_SIZE(iwl_dvm_groups);
1333
1334         trans_cfg.cmd_fifo = IWLAGN_CMD_FIFO_NUM;
1335         trans_cfg.cb_data_offs = offsetof(struct ieee80211_tx_info,
1336                                           driver_data[2]);
1337
1338         WARN_ON(sizeof(priv->transport_queue_stop) * BITS_PER_BYTE <
1339                 priv->trans->trans_cfg->base_params->num_of_queues);
1340
1341         ucode_flags = fw->ucode_capa.flags;
1342
1343         if (ucode_flags & IWL_UCODE_TLV_FLAGS_PAN) {
1344                 priv->sta_key_max_num = STA_KEY_MAX_NUM_PAN;
1345                 trans_cfg.cmd_queue = IWL_IPAN_CMD_QUEUE_NUM;
1346         } else {
1347                 priv->sta_key_max_num = STA_KEY_MAX_NUM;
1348                 trans_cfg.cmd_queue = IWL_DEFAULT_CMD_QUEUE_NUM;
1349         }
1350
1351         /* Configure transport layer */
1352         iwl_trans_configure(priv->trans, &trans_cfg);
1353
1354         trans->rx_mpdu_cmd = REPLY_RX_MPDU_CMD;
1355         trans->rx_mpdu_cmd_hdr_size = sizeof(struct iwl_rx_mpdu_res_start);
1356         trans->command_groups = trans_cfg.command_groups;
1357         trans->command_groups_size = trans_cfg.command_groups_size;
1358
1359         /* At this point both hw and priv are allocated. */
1360
1361         SET_IEEE80211_DEV(priv->hw, priv->trans->dev);
1362
1363         iwl_option_config(priv);
1364
1365         IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
1366
1367         /* bt channel inhibition enabled*/
1368         priv->bt_ch_announce = true;
1369         IWL_DEBUG_INFO(priv, "BT channel inhibition is %s\n",
1370                        (priv->bt_ch_announce) ? "On" : "Off");
1371
1372         /* these spin locks will be used in apm_ops.init and EEPROM access
1373          * we should init now
1374          */
1375         spin_lock_init(&priv->statistics.lock);
1376
1377         /***********************
1378          * 2. Read REV register
1379          ***********************/
1380         IWL_INFO(priv, "Detected %s, REV=0x%X\n",
1381                 priv->trans->name, priv->trans->hw_rev);
1382
1383         err = iwl_trans_start_hw(priv->trans);
1384         if (err)
1385                 goto out_free_hw;
1386
1387         /* Read the EEPROM */
1388         err = iwl_read_eeprom(priv->trans, &priv->eeprom_blob,
1389                               &priv->eeprom_blob_size);
1390         if (err) {
1391                 IWL_ERR(priv, "Unable to init EEPROM\n");
1392                 goto out_free_hw;
1393         }
1394
1395         /* Reset chip to save power until we load uCode during "up". */
1396         iwl_trans_stop_device(priv->trans);
1397
1398         priv->nvm_data = iwl_parse_eeprom_data(priv->trans, priv->cfg,
1399                                                priv->eeprom_blob,
1400                                                priv->eeprom_blob_size);
1401         if (!priv->nvm_data) {
1402                 err = -ENOMEM;
1403                 goto out_free_eeprom_blob;
1404         }
1405
1406         err = iwl_nvm_check_version(priv->nvm_data, priv->trans);
1407         if (err)
1408                 goto out_free_eeprom;
1409
1410         err = iwl_eeprom_init_hw_params(priv);
1411         if (err)
1412                 goto out_free_eeprom;
1413
1414         /* extract MAC Address */
1415         memcpy(priv->addresses[0].addr, priv->nvm_data->hw_addr, ETH_ALEN);
1416         IWL_DEBUG_INFO(priv, "MAC address: %pM\n", priv->addresses[0].addr);
1417         priv->hw->wiphy->addresses = priv->addresses;
1418         priv->hw->wiphy->n_addresses = 1;
1419         num_mac = priv->nvm_data->n_hw_addrs;
1420         if (num_mac > 1) {
1421                 memcpy(priv->addresses[1].addr, priv->addresses[0].addr,
1422                        ETH_ALEN);
1423                 priv->addresses[1].addr[5]++;
1424                 priv->hw->wiphy->n_addresses++;
1425         }
1426
1427         /************************
1428          * 4. Setup HW constants
1429          ************************/
1430         iwl_set_hw_params(priv);
1431
1432         if (!(priv->nvm_data->sku_cap_ipan_enable)) {
1433                 IWL_DEBUG_INFO(priv, "Your EEPROM disabled PAN\n");
1434                 ucode_flags &= ~IWL_UCODE_TLV_FLAGS_PAN;
1435                 /*
1436                  * if not PAN, then don't support P2P -- might be a uCode
1437                  * packaging bug or due to the eeprom check above
1438                  */
1439                 priv->sta_key_max_num = STA_KEY_MAX_NUM;
1440                 trans_cfg.cmd_queue = IWL_DEFAULT_CMD_QUEUE_NUM;
1441
1442                 /* Configure transport layer again*/
1443                 iwl_trans_configure(priv->trans, &trans_cfg);
1444         }
1445
1446         /*******************
1447          * 5. Setup priv
1448          *******************/
1449         for (i = 0; i < IWL_MAX_HW_QUEUES; i++) {
1450                 priv->queue_to_mac80211[i] = IWL_INVALID_MAC80211_QUEUE;
1451                 if (i < IWLAGN_FIRST_AMPDU_QUEUE &&
1452                     i != IWL_DEFAULT_CMD_QUEUE_NUM &&
1453                     i != IWL_IPAN_CMD_QUEUE_NUM)
1454                         priv->queue_to_mac80211[i] = i;
1455                 atomic_set(&priv->queue_stop_count[i], 0);
1456         }
1457
1458         err = iwl_init_drv(priv);
1459         if (err)
1460                 goto out_free_eeprom;
1461
1462         /* At this point both hw and priv are initialized. */
1463
1464         /********************
1465          * 6. Setup services
1466          ********************/
1467         iwl_setup_deferred_work(priv);
1468         iwl_setup_rx_handlers(priv);
1469
1470         iwl_power_initialize(priv);
1471         iwl_tt_initialize(priv);
1472
1473         snprintf(priv->hw->wiphy->fw_version,
1474                  sizeof(priv->hw->wiphy->fw_version),
1475                  "%.31s", fw->fw_version);
1476
1477         priv->new_scan_threshold_behaviour =
1478                 !!(ucode_flags & IWL_UCODE_TLV_FLAGS_NEWSCAN);
1479
1480         priv->phy_calib_chain_noise_reset_cmd =
1481                 fw->ucode_capa.standard_phy_calibration_size;
1482         priv->phy_calib_chain_noise_gain_cmd =
1483                 fw->ucode_capa.standard_phy_calibration_size + 1;
1484
1485         /* initialize all valid contexts */
1486         iwl_init_context(priv, ucode_flags);
1487
1488         /**************************************************
1489          * This is still part of probe() in a sense...
1490          *
1491          * 7. Setup and register with mac80211 and debugfs
1492          **************************************************/
1493         err = iwlagn_mac_setup_register(priv, &fw->ucode_capa);
1494         if (err)
1495                 goto out_destroy_workqueue;
1496
1497         iwl_dbgfs_register(priv, dbgfs_dir);
1498
1499         return op_mode;
1500
1501 out_destroy_workqueue:
1502         iwl_tt_exit(priv);
1503         iwl_cancel_deferred_work(priv);
1504         destroy_workqueue(priv->workqueue);
1505         priv->workqueue = NULL;
1506         iwl_uninit_drv(priv);
1507 out_free_eeprom_blob:
1508         kfree(priv->eeprom_blob);
1509 out_free_eeprom:
1510         kfree(priv->nvm_data);
1511 out_free_hw:
1512         ieee80211_free_hw(priv->hw);
1513 out:
1514         return ERR_PTR(err);
1515 }
1516
1517 static void iwl_op_mode_dvm_stop(struct iwl_op_mode *op_mode)
1518 {
1519         struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
1520
1521         IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
1522
1523         iwlagn_mac_unregister(priv);
1524
1525         iwl_tt_exit(priv);
1526
1527         kfree(priv->eeprom_blob);
1528         kfree(priv->nvm_data);
1529
1530         /*netif_stop_queue(dev); */
1531
1532         /* ieee80211_unregister_hw calls iwlagn_mac_stop, which flushes
1533          * priv->workqueue... so we can't take down the workqueue
1534          * until now... */
1535         destroy_workqueue(priv->workqueue);
1536         priv->workqueue = NULL;
1537
1538         iwl_uninit_drv(priv);
1539
1540         dev_kfree_skb(priv->beacon_skb);
1541
1542         iwl_trans_op_mode_leave(priv->trans);
1543         ieee80211_free_hw(priv->hw);
1544 }
1545
1546 static const char * const desc_lookup_text[] = {
1547         "OK",
1548         "FAIL",
1549         "BAD_PARAM",
1550         "BAD_CHECKSUM",
1551         "NMI_INTERRUPT_WDG",
1552         "SYSASSERT",
1553         "FATAL_ERROR",
1554         "BAD_COMMAND",
1555         "HW_ERROR_TUNE_LOCK",
1556         "HW_ERROR_TEMPERATURE",
1557         "ILLEGAL_CHAN_FREQ",
1558         "VCC_NOT_STABLE",
1559         "FH_ERROR",
1560         "NMI_INTERRUPT_HOST",
1561         "NMI_INTERRUPT_ACTION_PT",
1562         "NMI_INTERRUPT_UNKNOWN",
1563         "UCODE_VERSION_MISMATCH",
1564         "HW_ERROR_ABS_LOCK",
1565         "HW_ERROR_CAL_LOCK_FAIL",
1566         "NMI_INTERRUPT_INST_ACTION_PT",
1567         "NMI_INTERRUPT_DATA_ACTION_PT",
1568         "NMI_TRM_HW_ER",
1569         "NMI_INTERRUPT_TRM",
1570         "NMI_INTERRUPT_BREAK_POINT",
1571         "DEBUG_0",
1572         "DEBUG_1",
1573         "DEBUG_2",
1574         "DEBUG_3",
1575 };
1576
1577 static struct { char *name; u8 num; } advanced_lookup[] = {
1578         { "NMI_INTERRUPT_WDG", 0x34 },
1579         { "SYSASSERT", 0x35 },
1580         { "UCODE_VERSION_MISMATCH", 0x37 },
1581         { "BAD_COMMAND", 0x38 },
1582         { "NMI_INTERRUPT_DATA_ACTION_PT", 0x3C },
1583         { "FATAL_ERROR", 0x3D },
1584         { "NMI_TRM_HW_ERR", 0x46 },
1585         { "NMI_INTERRUPT_TRM", 0x4C },
1586         { "NMI_INTERRUPT_BREAK_POINT", 0x54 },
1587         { "NMI_INTERRUPT_WDG_RXF_FULL", 0x5C },
1588         { "NMI_INTERRUPT_WDG_NO_RBD_RXF_FULL", 0x64 },
1589         { "NMI_INTERRUPT_HOST", 0x66 },
1590         { "NMI_INTERRUPT_ACTION_PT", 0x7C },
1591         { "NMI_INTERRUPT_UNKNOWN", 0x84 },
1592         { "NMI_INTERRUPT_INST_ACTION_PT", 0x86 },
1593         { "ADVANCED_SYSASSERT", 0 },
1594 };
1595
1596 static const char *desc_lookup(u32 num)
1597 {
1598         int i;
1599         int max = ARRAY_SIZE(desc_lookup_text);
1600
1601         if (num < max)
1602                 return desc_lookup_text[num];
1603
1604         max = ARRAY_SIZE(advanced_lookup) - 1;
1605         for (i = 0; i < max; i++) {
1606                 if (advanced_lookup[i].num == num)
1607                         break;
1608         }
1609         return advanced_lookup[i].name;
1610 }
1611
1612 #define ERROR_START_OFFSET  (1 * sizeof(u32))
1613 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
1614
1615 static void iwl_dump_nic_error_log(struct iwl_priv *priv)
1616 {
1617         struct iwl_trans *trans = priv->trans;
1618         u32 base;
1619         struct iwl_error_event_table table;
1620
1621         base = priv->device_pointers.error_event_table;
1622         if (priv->cur_ucode == IWL_UCODE_INIT) {
1623                 if (!base)
1624                         base = priv->fw->init_errlog_ptr;
1625         } else {
1626                 if (!base)
1627                         base = priv->fw->inst_errlog_ptr;
1628         }
1629
1630         if (!iwlagn_hw_valid_rtc_data_addr(base)) {
1631                 IWL_ERR(priv,
1632                         "Not valid error log pointer 0x%08X for %s uCode\n",
1633                         base,
1634                         (priv->cur_ucode == IWL_UCODE_INIT)
1635                                         ? "Init" : "RT");
1636                 return;
1637         }
1638
1639         /*TODO: Update dbgfs with ISR error stats obtained below */
1640         iwl_trans_read_mem_bytes(trans, base, &table, sizeof(table));
1641
1642         if (ERROR_START_OFFSET <= table.valid * ERROR_ELEM_SIZE) {
1643                 IWL_ERR(trans, "Start IWL Error Log Dump:\n");
1644                 IWL_ERR(trans, "Status: 0x%08lX, count: %d\n",
1645                         priv->status, table.valid);
1646         }
1647
1648         IWL_ERR(priv, "0x%08X | %-28s\n", table.error_id,
1649                 desc_lookup(table.error_id));
1650         IWL_ERR(priv, "0x%08X | uPc\n", table.pc);
1651         IWL_ERR(priv, "0x%08X | branchlink1\n", table.blink1);
1652         IWL_ERR(priv, "0x%08X | branchlink2\n", table.blink2);
1653         IWL_ERR(priv, "0x%08X | interruptlink1\n", table.ilink1);
1654         IWL_ERR(priv, "0x%08X | interruptlink2\n", table.ilink2);
1655         IWL_ERR(priv, "0x%08X | data1\n", table.data1);
1656         IWL_ERR(priv, "0x%08X | data2\n", table.data2);
1657         IWL_ERR(priv, "0x%08X | line\n", table.line);
1658         IWL_ERR(priv, "0x%08X | beacon time\n", table.bcon_time);
1659         IWL_ERR(priv, "0x%08X | tsf low\n", table.tsf_low);
1660         IWL_ERR(priv, "0x%08X | tsf hi\n", table.tsf_hi);
1661         IWL_ERR(priv, "0x%08X | time gp1\n", table.gp1);
1662         IWL_ERR(priv, "0x%08X | time gp2\n", table.gp2);
1663         IWL_ERR(priv, "0x%08X | time gp3\n", table.gp3);
1664         IWL_ERR(priv, "0x%08X | uCode version\n", table.ucode_ver);
1665         IWL_ERR(priv, "0x%08X | hw version\n", table.hw_ver);
1666         IWL_ERR(priv, "0x%08X | board version\n", table.brd_ver);
1667         IWL_ERR(priv, "0x%08X | hcmd\n", table.hcmd);
1668         IWL_ERR(priv, "0x%08X | isr0\n", table.isr0);
1669         IWL_ERR(priv, "0x%08X | isr1\n", table.isr1);
1670         IWL_ERR(priv, "0x%08X | isr2\n", table.isr2);
1671         IWL_ERR(priv, "0x%08X | isr3\n", table.isr3);
1672         IWL_ERR(priv, "0x%08X | isr4\n", table.isr4);
1673         IWL_ERR(priv, "0x%08X | isr_pref\n", table.isr_pref);
1674         IWL_ERR(priv, "0x%08X | wait_event\n", table.wait_event);
1675         IWL_ERR(priv, "0x%08X | l2p_control\n", table.l2p_control);
1676         IWL_ERR(priv, "0x%08X | l2p_duration\n", table.l2p_duration);
1677         IWL_ERR(priv, "0x%08X | l2p_mhvalid\n", table.l2p_mhvalid);
1678         IWL_ERR(priv, "0x%08X | l2p_addr_match\n", table.l2p_addr_match);
1679         IWL_ERR(priv, "0x%08X | lmpm_pmg_sel\n", table.lmpm_pmg_sel);
1680         IWL_ERR(priv, "0x%08X | timestamp\n", table.u_timestamp);
1681         IWL_ERR(priv, "0x%08X | flow_handler\n", table.flow_handler);
1682 }
1683
1684 #define EVENT_START_OFFSET  (4 * sizeof(u32))
1685
1686 /*
1687  * iwl_print_event_log - Dump error event log to syslog
1688  */
1689 static int iwl_print_event_log(struct iwl_priv *priv, u32 start_idx,
1690                                u32 num_events, u32 mode,
1691                                int pos, char **buf, size_t bufsz)
1692 {
1693         u32 i;
1694         u32 base;       /* SRAM byte address of event log header */
1695         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
1696         u32 ptr;        /* SRAM byte address of log data */
1697         u32 ev, time, data; /* event log data */
1698
1699         struct iwl_trans *trans = priv->trans;
1700
1701         if (num_events == 0)
1702                 return pos;
1703
1704         base = priv->device_pointers.log_event_table;
1705         if (priv->cur_ucode == IWL_UCODE_INIT) {
1706                 if (!base)
1707                         base = priv->fw->init_evtlog_ptr;
1708         } else {
1709                 if (!base)
1710                         base = priv->fw->inst_evtlog_ptr;
1711         }
1712
1713         if (mode == 0)
1714                 event_size = 2 * sizeof(u32);
1715         else
1716                 event_size = 3 * sizeof(u32);
1717
1718         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
1719
1720         /* Make sure device is powered up for SRAM reads */
1721         if (!iwl_trans_grab_nic_access(trans))
1722                 return pos;
1723
1724         /* Set starting address; reads will auto-increment */
1725         iwl_write32(trans, HBUS_TARG_MEM_RADDR, ptr);
1726
1727         /* "time" is actually "data" for mode 0 (no timestamp).
1728         * place event id # at far right for easier visual parsing. */
1729         for (i = 0; i < num_events; i++) {
1730                 ev = iwl_read32(trans, HBUS_TARG_MEM_RDAT);
1731                 time = iwl_read32(trans, HBUS_TARG_MEM_RDAT);
1732                 if (mode == 0) {
1733                         /* data, ev */
1734                         if (bufsz) {
1735                                 pos += scnprintf(*buf + pos, bufsz - pos,
1736                                                 "EVT_LOG:0x%08x:%04u\n",
1737                                                 time, ev);
1738                         } else {
1739                                 trace_iwlwifi_dev_ucode_event(trans->dev, 0,
1740                                         time, ev);
1741                                 IWL_ERR(priv, "EVT_LOG:0x%08x:%04u\n",
1742                                         time, ev);
1743                         }
1744                 } else {
1745                         data = iwl_read32(trans, HBUS_TARG_MEM_RDAT);
1746                         if (bufsz) {
1747                                 pos += scnprintf(*buf + pos, bufsz - pos,
1748                                                 "EVT_LOGT:%010u:0x%08x:%04u\n",
1749                                                  time, data, ev);
1750                         } else {
1751                                 IWL_ERR(priv, "EVT_LOGT:%010u:0x%08x:%04u\n",
1752                                         time, data, ev);
1753                                 trace_iwlwifi_dev_ucode_event(trans->dev, time,
1754                                         data, ev);
1755                         }
1756                 }
1757         }
1758
1759         /* Allow device to power down */
1760         iwl_trans_release_nic_access(trans);
1761         return pos;
1762 }
1763
1764 /*
1765  * iwl_print_last_event_logs - Dump the newest # of event log to syslog
1766  */
1767 static int iwl_print_last_event_logs(struct iwl_priv *priv, u32 capacity,
1768                                     u32 num_wraps, u32 next_entry,
1769                                     u32 size, u32 mode,
1770                                     int pos, char **buf, size_t bufsz)
1771 {
1772         /*
1773          * display the newest DEFAULT_LOG_ENTRIES entries
1774          * i.e the entries just before the next ont that uCode would fill.
1775          */
1776         if (num_wraps) {
1777                 if (next_entry < size) {
1778                         pos = iwl_print_event_log(priv,
1779                                                 capacity - (size - next_entry),
1780                                                 size - next_entry, mode,
1781                                                 pos, buf, bufsz);
1782                         pos = iwl_print_event_log(priv, 0,
1783                                                   next_entry, mode,
1784                                                   pos, buf, bufsz);
1785                 } else
1786                         pos = iwl_print_event_log(priv, next_entry - size,
1787                                                   size, mode, pos, buf, bufsz);
1788         } else {
1789                 if (next_entry < size) {
1790                         pos = iwl_print_event_log(priv, 0, next_entry,
1791                                                   mode, pos, buf, bufsz);
1792                 } else {
1793                         pos = iwl_print_event_log(priv, next_entry - size,
1794                                                   size, mode, pos, buf, bufsz);
1795                 }
1796         }
1797         return pos;
1798 }
1799
1800 #define DEFAULT_DUMP_EVENT_LOG_ENTRIES (20)
1801
1802 int iwl_dump_nic_event_log(struct iwl_priv *priv, bool full_log,
1803                             char **buf)
1804 {
1805         u32 base;       /* SRAM byte address of event log header */
1806         u32 capacity;   /* event log capacity in # entries */
1807         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
1808         u32 num_wraps;  /* # times uCode wrapped to top of log */
1809         u32 next_entry; /* index of next entry to be written by uCode */
1810         u32 size;       /* # entries that we'll print */
1811         u32 logsize;
1812         int pos = 0;
1813         size_t bufsz = 0;
1814         struct iwl_trans *trans = priv->trans;
1815
1816         base = priv->device_pointers.log_event_table;
1817         if (priv->cur_ucode == IWL_UCODE_INIT) {
1818                 logsize = priv->fw->init_evtlog_size;
1819                 if (!base)
1820                         base = priv->fw->init_evtlog_ptr;
1821         } else {
1822                 logsize = priv->fw->inst_evtlog_size;
1823                 if (!base)
1824                         base = priv->fw->inst_evtlog_ptr;
1825         }
1826
1827         if (!iwlagn_hw_valid_rtc_data_addr(base)) {
1828                 IWL_ERR(priv,
1829                         "Invalid event log pointer 0x%08X for %s uCode\n",
1830                         base,
1831                         (priv->cur_ucode == IWL_UCODE_INIT)
1832                                         ? "Init" : "RT");
1833                 return -EINVAL;
1834         }
1835
1836         /* event log header */
1837         capacity = iwl_trans_read_mem32(trans, base);
1838         mode = iwl_trans_read_mem32(trans, base + (1 * sizeof(u32)));
1839         num_wraps = iwl_trans_read_mem32(trans, base + (2 * sizeof(u32)));
1840         next_entry = iwl_trans_read_mem32(trans, base + (3 * sizeof(u32)));
1841
1842         if (capacity > logsize) {
1843                 IWL_ERR(priv, "Log capacity %d is bogus, limit to %d "
1844                         "entries\n", capacity, logsize);
1845                 capacity = logsize;
1846         }
1847
1848         if (next_entry > logsize) {
1849                 IWL_ERR(priv, "Log write index %d is bogus, limit to %d\n",
1850                         next_entry, logsize);
1851                 next_entry = logsize;
1852         }
1853
1854         size = num_wraps ? capacity : next_entry;
1855
1856         /* bail out if nothing in log */
1857         if (size == 0) {
1858                 IWL_ERR(trans, "Start IWL Event Log Dump: nothing in log\n");
1859                 return pos;
1860         }
1861
1862         if (!(iwl_have_debug_level(IWL_DL_FW)) && !full_log)
1863                 size = (size > DEFAULT_DUMP_EVENT_LOG_ENTRIES)
1864                         ? DEFAULT_DUMP_EVENT_LOG_ENTRIES : size;
1865         IWL_ERR(priv, "Start IWL Event Log Dump: display last %u entries\n",
1866                 size);
1867
1868 #ifdef CONFIG_IWLWIFI_DEBUG
1869         if (buf) {
1870                 if (full_log)
1871                         bufsz = capacity * 48;
1872                 else
1873                         bufsz = size * 48;
1874                 *buf = kmalloc(bufsz, GFP_KERNEL);
1875                 if (!*buf)
1876                         return -ENOMEM;
1877         }
1878         if (iwl_have_debug_level(IWL_DL_FW) || full_log) {
1879                 /*
1880                  * if uCode has wrapped back to top of log,
1881                  * start at the oldest entry,
1882                  * i.e the next one that uCode would fill.
1883                  */
1884                 if (num_wraps)
1885                         pos = iwl_print_event_log(priv, next_entry,
1886                                                 capacity - next_entry, mode,
1887                                                 pos, buf, bufsz);
1888                 /* (then/else) start at top of log */
1889                 pos = iwl_print_event_log(priv, 0,
1890                                           next_entry, mode, pos, buf, bufsz);
1891         } else
1892                 pos = iwl_print_last_event_logs(priv, capacity, num_wraps,
1893                                                 next_entry, size, mode,
1894                                                 pos, buf, bufsz);
1895 #else
1896         pos = iwl_print_last_event_logs(priv, capacity, num_wraps,
1897                                         next_entry, size, mode,
1898                                         pos, buf, bufsz);
1899 #endif
1900         return pos;
1901 }
1902
1903 static void iwlagn_fw_error(struct iwl_priv *priv, bool ondemand)
1904 {
1905         unsigned int reload_msec;
1906         unsigned long reload_jiffies;
1907
1908         /* uCode is no longer loaded. */
1909         priv->ucode_loaded = false;
1910
1911         /* Keep the restart process from trying to send host
1912          * commands by clearing the ready bit */
1913         clear_bit(STATUS_READY, &priv->status);
1914
1915         if (!ondemand) {
1916                 /*
1917                  * If firmware keep reloading, then it indicate something
1918                  * serious wrong and firmware having problem to recover
1919                  * from it. Instead of keep trying which will fill the syslog
1920                  * and hang the system, let's just stop it
1921                  */
1922                 reload_jiffies = jiffies;
1923                 reload_msec = jiffies_to_msecs((long) reload_jiffies -
1924                                         (long) priv->reload_jiffies);
1925                 priv->reload_jiffies = reload_jiffies;
1926                 if (reload_msec <= IWL_MIN_RELOAD_DURATION) {
1927                         priv->reload_count++;
1928                         if (priv->reload_count >= IWL_MAX_CONTINUE_RELOAD_CNT) {
1929                                 IWL_ERR(priv, "BUG_ON, Stop restarting\n");
1930                                 return;
1931                         }
1932                 } else
1933                         priv->reload_count = 0;
1934         }
1935
1936         if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1937                 if (iwlwifi_mod_params.fw_restart) {
1938                         IWL_DEBUG_FW(priv,
1939                                      "Restarting adapter due to uCode error.\n");
1940                         queue_work(priv->workqueue, &priv->restart);
1941                 } else
1942                         IWL_DEBUG_FW(priv,
1943                                      "Detected FW error, but not restarting\n");
1944         }
1945 }
1946
1947 static void iwl_nic_error(struct iwl_op_mode *op_mode,
1948                           enum iwl_fw_error_type type)
1949 {
1950         struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
1951
1952         /* Set the FW error flag -- cleared on iwl_down */
1953         set_bit(STATUS_FW_ERROR, &priv->status);
1954
1955         iwl_abort_notification_waits(&priv->notif_wait);
1956
1957         if (type == IWL_ERR_TYPE_CMD_QUEUE_FULL && iwl_check_for_ct_kill(priv))
1958                 return;
1959
1960         IWL_ERR(priv, "Loaded firmware version: %s\n",
1961                 priv->fw->fw_version);
1962
1963         if (type == IWL_ERR_TYPE_CMD_QUEUE_FULL) {
1964                 IWL_ERR(priv, "Command queue full!\n");
1965         } else {
1966                 iwl_dump_nic_error_log(priv);
1967                 iwl_dump_nic_event_log(priv, false, NULL);
1968         }
1969
1970         if (iwl_have_debug_level(IWL_DL_FW))
1971                 iwl_print_rx_config_cmd(priv, IWL_RXON_CTX_BSS);
1972 }
1973
1974 static bool iwlagn_sw_reset(struct iwl_op_mode *op_mode,
1975                             enum iwl_fw_error_type type)
1976 {
1977         struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
1978
1979         if (type == IWL_ERR_TYPE_CMD_QUEUE_FULL && iwl_check_for_ct_kill(priv))
1980                 return false;
1981
1982         iwlagn_fw_error(priv, false);
1983         return true;
1984 }
1985
1986 #define EEPROM_RF_CONFIG_TYPE_MAX      0x3
1987
1988 static void iwl_nic_config(struct iwl_op_mode *op_mode)
1989 {
1990         struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
1991
1992         /* SKU Control */
1993         iwl_trans_set_bits_mask(priv->trans, CSR_HW_IF_CONFIG_REG,
1994                                 CSR_HW_IF_CONFIG_REG_MSK_MAC_STEP_DASH,
1995                                 CSR_HW_REV_STEP_DASH(priv->trans->hw_rev));
1996
1997         /* write radio config values to register */
1998         if (priv->nvm_data->radio_cfg_type <= EEPROM_RF_CONFIG_TYPE_MAX) {
1999                 u32 reg_val =
2000                         priv->nvm_data->radio_cfg_type <<
2001                                 CSR_HW_IF_CONFIG_REG_POS_PHY_TYPE |
2002                         priv->nvm_data->radio_cfg_step <<
2003                                 CSR_HW_IF_CONFIG_REG_POS_PHY_STEP |
2004                         priv->nvm_data->radio_cfg_dash <<
2005                                 CSR_HW_IF_CONFIG_REG_POS_PHY_DASH;
2006
2007                 iwl_trans_set_bits_mask(priv->trans, CSR_HW_IF_CONFIG_REG,
2008                                         CSR_HW_IF_CONFIG_REG_MSK_PHY_TYPE |
2009                                         CSR_HW_IF_CONFIG_REG_MSK_PHY_STEP |
2010                                         CSR_HW_IF_CONFIG_REG_MSK_PHY_DASH,
2011                                         reg_val);
2012
2013                 IWL_INFO(priv, "Radio type=0x%x-0x%x-0x%x\n",
2014                          priv->nvm_data->radio_cfg_type,
2015                          priv->nvm_data->radio_cfg_step,
2016                          priv->nvm_data->radio_cfg_dash);
2017         } else {
2018                 WARN_ON(1);
2019         }
2020
2021         /* set CSR_HW_CONFIG_REG for uCode use */
2022         iwl_set_bit(priv->trans, CSR_HW_IF_CONFIG_REG,
2023                     CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI |
2024                     CSR_HW_IF_CONFIG_REG_BIT_MAC_SI);
2025
2026         /* W/A : NIC is stuck in a reset state after Early PCIe power off
2027          * (PCIe power is lost before PERST# is asserted),
2028          * causing ME FW to lose ownership and not being able to obtain it back.
2029          */
2030         iwl_set_bits_mask_prph(priv->trans, APMG_PS_CTRL_REG,
2031                                APMG_PS_CTRL_EARLY_PWR_OFF_RESET_DIS,
2032                                ~APMG_PS_CTRL_EARLY_PWR_OFF_RESET_DIS);
2033
2034         if (priv->lib->nic_config)
2035                 priv->lib->nic_config(priv);
2036 }
2037
2038 static void iwl_wimax_active(struct iwl_op_mode *op_mode)
2039 {
2040         struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
2041
2042         clear_bit(STATUS_READY, &priv->status);
2043         IWL_ERR(priv, "RF is used by WiMAX\n");
2044 }
2045
2046 static void iwl_stop_sw_queue(struct iwl_op_mode *op_mode, int queue)
2047 {
2048         struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
2049         int mq = priv->queue_to_mac80211[queue];
2050
2051         if (WARN_ON_ONCE(mq == IWL_INVALID_MAC80211_QUEUE))
2052                 return;
2053
2054         if (atomic_inc_return(&priv->queue_stop_count[mq]) > 1) {
2055                 IWL_DEBUG_TX_QUEUES(priv,
2056                         "queue %d (mac80211 %d) already stopped\n",
2057                         queue, mq);
2058                 return;
2059         }
2060
2061         set_bit(mq, &priv->transport_queue_stop);
2062         ieee80211_stop_queue(priv->hw, mq);
2063 }
2064
2065 static void iwl_wake_sw_queue(struct iwl_op_mode *op_mode, int queue)
2066 {
2067         struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
2068         int mq = priv->queue_to_mac80211[queue];
2069
2070         if (WARN_ON_ONCE(mq == IWL_INVALID_MAC80211_QUEUE))
2071                 return;
2072
2073         if (atomic_dec_return(&priv->queue_stop_count[mq]) > 0) {
2074                 IWL_DEBUG_TX_QUEUES(priv,
2075                         "queue %d (mac80211 %d) already awake\n",
2076                         queue, mq);
2077                 return;
2078         }
2079
2080         clear_bit(mq, &priv->transport_queue_stop);
2081
2082         if (!priv->passive_no_rx)
2083                 ieee80211_wake_queue(priv->hw, mq);
2084 }
2085
2086 void iwlagn_lift_passive_no_rx(struct iwl_priv *priv)
2087 {
2088         int mq;
2089
2090         if (!priv->passive_no_rx)
2091                 return;
2092
2093         for (mq = 0; mq < IWLAGN_FIRST_AMPDU_QUEUE; mq++) {
2094                 if (!test_bit(mq, &priv->transport_queue_stop)) {
2095                         IWL_DEBUG_TX_QUEUES(priv, "Wake queue %d\n", mq);
2096                         ieee80211_wake_queue(priv->hw, mq);
2097                 } else {
2098                         IWL_DEBUG_TX_QUEUES(priv, "Don't wake queue %d\n", mq);
2099                 }
2100         }
2101
2102         priv->passive_no_rx = false;
2103 }
2104
2105 static void iwl_free_skb(struct iwl_op_mode *op_mode, struct sk_buff *skb)
2106 {
2107         struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
2108         struct ieee80211_tx_info *info;
2109
2110         info = IEEE80211_SKB_CB(skb);
2111         iwl_trans_free_tx_cmd(priv->trans, info->driver_data[1]);
2112         ieee80211_free_txskb(priv->hw, skb);
2113 }
2114
2115 static bool iwl_set_hw_rfkill_state(struct iwl_op_mode *op_mode, bool state)
2116 {
2117         struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
2118
2119         if (state)
2120                 set_bit(STATUS_RF_KILL_HW, &priv->status);
2121         else
2122                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
2123
2124         wiphy_rfkill_set_hw_state(priv->hw->wiphy, state);
2125
2126         return false;
2127 }
2128
2129 static const struct iwl_op_mode_ops iwl_dvm_ops = {
2130         .start = iwl_op_mode_dvm_start,
2131         .stop = iwl_op_mode_dvm_stop,
2132         .rx = iwl_rx_dispatch,
2133         .queue_full = iwl_stop_sw_queue,
2134         .queue_not_full = iwl_wake_sw_queue,
2135         .hw_rf_kill = iwl_set_hw_rfkill_state,
2136         .free_skb = iwl_free_skb,
2137         .nic_error = iwl_nic_error,
2138         .sw_reset = iwlagn_sw_reset,
2139         .nic_config = iwl_nic_config,
2140         .wimax_active = iwl_wimax_active,
2141 };
2142
2143 /*****************************************************************************
2144  *
2145  * driver and module entry point
2146  *
2147  *****************************************************************************/
2148 static int __init iwl_init(void)
2149 {
2150
2151         int ret;
2152
2153         ret = iwlagn_rate_control_register();
2154         if (ret) {
2155                 pr_err("Unable to register rate control algorithm: %d\n", ret);
2156                 return ret;
2157         }
2158
2159         ret = iwl_opmode_register("iwldvm", &iwl_dvm_ops);
2160         if (ret) {
2161                 pr_err("Unable to register op_mode: %d\n", ret);
2162                 iwlagn_rate_control_unregister();
2163         }
2164
2165         return ret;
2166 }
2167 module_init(iwl_init);
2168
2169 static void __exit iwl_exit(void)
2170 {
2171         iwl_opmode_deregister("iwldvm");
2172         iwlagn_rate_control_unregister();
2173 }
2174 module_exit(iwl_exit);