drivers/net/wireless/iwlwifi/iwl-agn.c

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2012 Intel Corporation. All rights reserved.
   4  *
   5  * Portions of this file are derived from the ipw3945 project, as well
   6  * as portions of the ieee80211 subsystem header files.
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of version 2 of the GNU General Public License as
  10  * published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  20  *
  21  * The full GNU General Public License is included in this distribution in the
  22  * file called LICENSE.
  23  *
  24  * Contact Information:
  25  *  Intel Linux Wireless <ilw@linux.intel.com>
  26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27  *
  28  *****************************************************************************/
  29 #include <linux/kernel.h>
  30 #include <linux/module.h>
  31 #include <linux/init.h>
  32 #include <linux/slab.h>
  33 #include <linux/delay.h>
  34 #include <linux/sched.h>
  35 #include <linux/skbuff.h>
  36 #include <linux/netdevice.h>
  37 #include <linux/etherdevice.h>
  38 #include <linux/if_arp.h>
  39
  40 #include <net/mac80211.h>
  41
  42 #include <asm/div64.h>
  43
  44 #include "iwl-ucode.h"
  45 #include "iwl-eeprom.h"
  46 #include "iwl-wifi.h"
  47 #include "iwl-dev.h"
  48 #include "iwl-core.h"
  49 #include "iwl-io.h"
  50 #include "iwl-agn-calib.h"
  51 #include "iwl-agn.h"
  52 #include "iwl-shared.h"
  53 #include "iwl-bus.h"
  54 #include "iwl-trans.h"
  55 #include "iwl-op-mode.h"
  56
  57 /******************************************************************************
  58  *
  59  * module boiler plate
  60  *
  61  ******************************************************************************/
  62
  63 /*
  64  * module name, copyright, version, etc.
  65  */
  66 #define DRV_DESCRIPTION "Intel(R) Wireless WiFi Link AGN driver for Linux"
  67
  68 #ifdef CONFIG_IWLWIFI_DEBUG
  69 #define VD "d"
  70 #else
  71 #define VD
  72 #endif
  73
  74 #define DRV_VERSION     IWLWIFI_VERSION VD
  75
  76
  77 MODULE_DESCRIPTION(DRV_DESCRIPTION);
  78 MODULE_VERSION(DRV_VERSION);
  79 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
  80 MODULE_LICENSE("GPL");
  81 MODULE_ALIAS("iwlagn");
  82
  83 void iwl_update_chain_flags(struct iwl_priv *priv)
  84 {
  85         struct iwl_rxon_context *ctx;
  86
  87         for_each_context(priv, ctx) {
  88                 iwlagn_set_rxon_chain(priv, ctx);
  89                 if (ctx->active.rx_chain != ctx->staging.rx_chain)
  90                         iwlagn_commit_rxon(priv, ctx);
  91         }
  92 }
  93
  94 /* Parse the beacon frame to find the TIM element and set tim_idx & tim_size */
  95 static void iwl_set_beacon_tim(struct iwl_priv *priv,
  96                                struct iwl_tx_beacon_cmd *tx_beacon_cmd,
  97                                u8 *beacon, u32 frame_size)
  98 {
  99         u16 tim_idx;
 100         struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)beacon;
 101
 102         /*
 103          * The index is relative to frame start but we start looking at the
 104          * variable-length part of the beacon.
 105          */
 106         tim_idx = mgmt->u.beacon.variable - beacon;
 107
 108         /* Parse variable-length elements of beacon to find WLAN_EID_TIM */
 109         while ((tim_idx < (frame_size - 2)) &&
 110                         (beacon[tim_idx] != WLAN_EID_TIM))
 111                 tim_idx += beacon[tim_idx+1] + 2;
 112
 113         /* If TIM field was found, set variables */
 114         if ((tim_idx < (frame_size - 1)) && (beacon[tim_idx] == WLAN_EID_TIM)) {
 115                 tx_beacon_cmd->tim_idx = cpu_to_le16(tim_idx);
 116                 tx_beacon_cmd->tim_size = beacon[tim_idx+1];
 117         } else
 118                 IWL_WARN(priv, "Unable to find TIM Element in beacon\n");
 119 }
 120
 121 int iwlagn_send_beacon_cmd(struct iwl_priv *priv)
 122 {
 123         struct iwl_tx_beacon_cmd *tx_beacon_cmd;
 124         struct iwl_host_cmd cmd = {
 125                 .id = REPLY_TX_BEACON,
 126                 .flags = CMD_SYNC,
 127         };
 128         struct ieee80211_tx_info *info;
 129         u32 frame_size;
 130         u32 rate_flags;
 131         u32 rate;
 132
 133         /*
 134          * We have to set up the TX command, the TX Beacon command, and the
 135          * beacon contents.
 136          */
 137
 138         lockdep_assert_held(&priv->shrd->mutex);
 139
 140         if (!priv->beacon_ctx) {
 141                 IWL_ERR(priv, "trying to build beacon w/o beacon context!\n");
 142                 return 0;
 143         }
 144
 145         if (WARN_ON(!priv->beacon_skb))
 146                 return -EINVAL;
 147
 148         /* Allocate beacon command */
 149         if (!priv->beacon_cmd)
 150                 priv->beacon_cmd = kzalloc(sizeof(*tx_beacon_cmd), GFP_KERNEL);
 151         tx_beacon_cmd = priv->beacon_cmd;
 152         if (!tx_beacon_cmd)
 153                 return -ENOMEM;
 154
 155         frame_size = priv->beacon_skb->len;
 156
 157         /* Set up TX command fields */
 158         tx_beacon_cmd->tx.len = cpu_to_le16((u16)frame_size);
 159         tx_beacon_cmd->tx.sta_id = priv->beacon_ctx->bcast_sta_id;
 160         tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
 161         tx_beacon_cmd->tx.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK |
 162                 TX_CMD_FLG_TSF_MSK | TX_CMD_FLG_STA_RATE_MSK;
 163
 164         /* Set up TX beacon command fields */
 165         iwl_set_beacon_tim(priv, tx_beacon_cmd, priv->beacon_skb->data,
 166                            frame_size);
 167
 168         /* Set up packet rate and flags */
 169         info = IEEE80211_SKB_CB(priv->beacon_skb);
 170
 171         /*
 172          * Let's set up the rate at least somewhat correctly;
 173          * it will currently not actually be used by the uCode,
 174          * it uses the broadcast station's rate instead.
 175          */
 176         if (info->control.rates[0].idx < 0 ||
 177             info->control.rates[0].flags & IEEE80211_TX_RC_MCS)
 178                 rate = 0;
 179         else
 180                 rate = info->control.rates[0].idx;
 181
 182         priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant,
 183                                               hw_params(priv).valid_tx_ant);
 184         rate_flags = iwl_ant_idx_to_flags(priv->mgmt_tx_ant);
 185
 186         /* In mac80211, rates for 5 GHz start at 0 */
 187         if (info->band == IEEE80211_BAND_5GHZ)
 188                 rate += IWL_FIRST_OFDM_RATE;
 189         else if (rate >= IWL_FIRST_CCK_RATE && rate <= IWL_LAST_CCK_RATE)
 190                 rate_flags |= RATE_MCS_CCK_MSK;
 191
 192         tx_beacon_cmd->tx.rate_n_flags =
 193                         iwl_hw_set_rate_n_flags(rate, rate_flags);
 194
 195         /* Submit command */
 196         cmd.len[0] = sizeof(*tx_beacon_cmd);
 197         cmd.data[0] = tx_beacon_cmd;
 198         cmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY;
 199         cmd.len[1] = frame_size;
 200         cmd.data[1] = priv->beacon_skb->data;
 201         cmd.dataflags[1] = IWL_HCMD_DFL_NOCOPY;
 202
 203         return iwl_trans_send_cmd(trans(priv), &cmd);
 204 }
 205
 206 static void iwl_bg_beacon_update(struct work_struct *work)
 207 {
 208         struct iwl_priv *priv =
 209                 container_of(work, struct iwl_priv, beacon_update);
 210         struct sk_buff *beacon;
 211
 212         mutex_lock(&priv->shrd->mutex);
 213         if (!priv->beacon_ctx) {
 214                 IWL_ERR(priv, "updating beacon w/o beacon context!\n");
 215                 goto out;
 216         }
 217
 218         if (priv->beacon_ctx->vif->type != NL80211_IFTYPE_AP) {
 219                 /*
 220                  * The ucode will send beacon notifications even in
 221                  * IBSS mode, but we don't want to process them. But
 222                  * we need to defer the type check to here due to
 223                  * requiring locking around the beacon_ctx access.
 224                  */
 225                 goto out;
 226         }
 227
 228         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
 229         beacon = ieee80211_beacon_get(priv->hw, priv->beacon_ctx->vif);
 230         if (!beacon) {
 231                 IWL_ERR(priv, "update beacon failed -- keeping old\n");
 232                 goto out;
 233         }
 234
 235         /* new beacon skb is allocated every time; dispose previous.*/
 236         dev_kfree_skb(priv->beacon_skb);
 237
 238         priv->beacon_skb = beacon;
 239
 240         iwlagn_send_beacon_cmd(priv);
 241  out:
 242         mutex_unlock(&priv->shrd->mutex);
 243 }
 244
 245 static void iwl_bg_bt_runtime_config(struct work_struct *work)
 246 {
 247         struct iwl_priv *priv =
 248                 container_of(work, struct iwl_priv, bt_runtime_config);
 249
 250         if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
 251                 return;
 252
 253         /* dont send host command if rf-kill is on */
 254         if (!iwl_is_ready_rf(priv->shrd))
 255                 return;
 256         iwlagn_send_advance_bt_config(priv);
 257 }
 258
 259 static void iwl_bg_bt_full_concurrency(struct work_struct *work)
 260 {
 261         struct iwl_priv *priv =
 262                 container_of(work, struct iwl_priv, bt_full_concurrency);
 263         struct iwl_rxon_context *ctx;
 264
 265         mutex_lock(&priv->shrd->mutex);
 266
 267         if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
 268                 goto out;
 269
 270         /* dont send host command if rf-kill is on */
 271         if (!iwl_is_ready_rf(priv->shrd))
 272                 goto out;
 273
 274         IWL_DEBUG_INFO(priv, "BT coex in %s mode\n",
 275                        priv->bt_full_concurrent ?
 276                        "full concurrency" : "3-wire");
 277
 278         /*
 279          * LQ & RXON updated cmds must be sent before BT Config cmd
 280          * to avoid 3-wire collisions
 281          */
 282         for_each_context(priv, ctx) {
 283                 iwlagn_set_rxon_chain(priv, ctx);
 284                 iwlagn_commit_rxon(priv, ctx);
 285         }
 286
 287         iwlagn_send_advance_bt_config(priv);
 288 out:
 289         mutex_unlock(&priv->shrd->mutex);
 290 }
 291
 292 /**
 293  * iwl_bg_statistics_periodic - Timer callback to queue statistics
 294  *
 295  * This callback is provided in order to send a statistics request.
 296  *
 297  * This timer function is continually reset to execute within
 298  * REG_RECALIB_PERIOD seconds since the last STATISTICS_NOTIFICATION
 299  * was received.  We need to ensure we receive the statistics in order
 300  * to update the temperature used for calibrating the TXPOWER.
 301  */
 302 static void iwl_bg_statistics_periodic(unsigned long data)
 303 {
 304         struct iwl_priv *priv = (struct iwl_priv *)data;
 305
 306         if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
 307                 return;
 308
 309         /* dont send host command if rf-kill is on */
 310         if (!iwl_is_ready_rf(priv->shrd))
 311                 return;
 312
 313         iwl_send_statistics_request(priv, CMD_ASYNC, false);
 314 }
 315
 316
 317 static void iwl_print_cont_event_trace(struct iwl_priv *priv, u32 base,
 318                                         u32 start_idx, u32 num_events,
 319                                         u32 capacity, u32 mode)
 320 {
 321         u32 i;
 322         u32 ptr;        /* SRAM byte address of log data */
 323         u32 ev, time, data; /* event log data */
 324         unsigned long reg_flags;
 325
 326         if (mode == 0)
 327                 ptr = base + (4 * sizeof(u32)) + (start_idx * 2 * sizeof(u32));
 328         else
 329                 ptr = base + (4 * sizeof(u32)) + (start_idx * 3 * sizeof(u32));
 330
 331         /* Make sure device is powered up for SRAM reads */
 332         spin_lock_irqsave(&trans(priv)->reg_lock, reg_flags);
 333         if (iwl_grab_nic_access(trans(priv))) {
 334                 spin_unlock_irqrestore(&trans(priv)->reg_lock, reg_flags);
 335                 return;
 336         }
 337
 338         /* Set starting address; reads will auto-increment */
 339         iwl_write32(trans(priv), HBUS_TARG_MEM_RADDR, ptr);
 340         rmb();
 341
 342         /*
 343          * Refuse to read more than would have fit into the log from
 344          * the current start_idx. This used to happen due to the race
 345          * described below, but now WARN because the code below should
 346          * prevent it from happening here.
 347          */
 348         if (WARN_ON(num_events > capacity - start_idx))
 349                 num_events = capacity - start_idx;
 350
 351         /*
 352          * "time" is actually "data" for mode 0 (no timestamp).
 353          * place event id # at far right for easier visual parsing.
 354          */
 355         for (i = 0; i < num_events; i++) {
 356                 ev = iwl_read32(trans(priv), HBUS_TARG_MEM_RDAT);
 357                 time = iwl_read32(trans(priv), HBUS_TARG_MEM_RDAT);
 358                 if (mode == 0) {
 359                         trace_iwlwifi_dev_ucode_cont_event(priv, 0, time, ev);
 360                 } else {
 361                         data = iwl_read32(trans(priv), HBUS_TARG_MEM_RDAT);
 362                         trace_iwlwifi_dev_ucode_cont_event(priv, time,
 363                                                            data, ev);
 364                 }
 365         }
 366         /* Allow device to power down */
 367         iwl_release_nic_access(trans(priv));
 368         spin_unlock_irqrestore(&trans(priv)->reg_lock, reg_flags);
 369 }
 370
 371 static void iwl_continuous_event_trace(struct iwl_priv *priv)
 372 {
 373         u32 capacity;   /* event log capacity in # entries */
 374         struct {
 375                 u32 capacity;
 376                 u32 mode;
 377                 u32 wrap_counter;
 378                 u32 write_counter;
 379         } __packed read;
 380         u32 base;       /* SRAM byte address of event log header */
 381         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
 382         u32 num_wraps;  /* # times uCode wrapped to top of log */
 383         u32 next_entry; /* index of next entry to be written by uCode */
 384
 385         base = priv->shrd->device_pointers.log_event_table;
 386         if (iwlagn_hw_valid_rtc_data_addr(base)) {
 387                 iwl_read_targ_mem_words(trans(priv), base, &read, sizeof(read));
 388
 389                 capacity = read.capacity;
 390                 mode = read.mode;
 391                 num_wraps = read.wrap_counter;
 392                 next_entry = read.write_counter;
 393         } else
 394                 return;
 395
 396         /*
 397          * Unfortunately, the uCode doesn't use temporary variables.
 398          * Therefore, it can happen that we read next_entry == capacity,
 399          * which really means next_entry == 0.
 400          */
 401         if (unlikely(next_entry == capacity))
 402                 next_entry = 0;
 403         /*
 404          * Additionally, the uCode increases the write pointer before
 405          * the wraps counter, so if the write pointer is smaller than
 406          * the old write pointer (wrap occurred) but we read that no
 407          * wrap occurred, we actually read between the next_entry and
 408          * num_wraps update (this does happen in practice!!) -- take
 409          * that into account by increasing num_wraps.
 410          */
 411         if (unlikely(next_entry < priv->event_log.next_entry &&
 412                      num_wraps == priv->event_log.num_wraps))
 413                 num_wraps++;
 414
 415         if (num_wraps == priv->event_log.num_wraps) {
 416                 iwl_print_cont_event_trace(
 417                         priv, base, priv->event_log.next_entry,
 418                         next_entry - priv->event_log.next_entry,
 419                         capacity, mode);
 420
 421                 priv->event_log.non_wraps_count++;
 422         } else {
 423                 if (num_wraps - priv->event_log.num_wraps > 1)
 424                         priv->event_log.wraps_more_count++;
 425                 else
 426                         priv->event_log.wraps_once_count++;
 427
 428                 trace_iwlwifi_dev_ucode_wrap_event(priv,
 429                                 num_wraps - priv->event_log.num_wraps,
 430                                 next_entry, priv->event_log.next_entry);
 431
 432                 if (next_entry < priv->event_log.next_entry) {
 433                         iwl_print_cont_event_trace(
 434                                 priv, base, priv->event_log.next_entry,
 435                                 capacity - priv->event_log.next_entry,
 436                                 capacity, mode);
 437
 438                         iwl_print_cont_event_trace(
 439                                 priv, base, 0, next_entry, capacity, mode);
 440                 } else {
 441                         iwl_print_cont_event_trace(
 442                                 priv, base, next_entry,
 443                                 capacity - next_entry,
 444                                 capacity, mode);
 445
 446                         iwl_print_cont_event_trace(
 447                                 priv, base, 0, next_entry, capacity, mode);
 448                 }
 449         }
 450
 451         priv->event_log.num_wraps = num_wraps;
 452         priv->event_log.next_entry = next_entry;
 453 }
 454
 455 /**
 456  * iwl_bg_ucode_trace - Timer callback to log ucode event
 457  *
 458  * The timer is continually set to execute every
 459  * UCODE_TRACE_PERIOD milliseconds after the last timer expired
 460  * this function is to perform continuous uCode event logging operation
 461  * if enabled
 462  */
 463 static void iwl_bg_ucode_trace(unsigned long data)
 464 {
 465         struct iwl_priv *priv = (struct iwl_priv *)data;
 466
 467         if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
 468                 return;
 469
 470         if (priv->event_log.ucode_trace) {
 471                 iwl_continuous_event_trace(priv);
 472                 /* Reschedule the timer to occur in UCODE_TRACE_PERIOD */
 473                 mod_timer(&priv->ucode_trace,
 474                          jiffies + msecs_to_jiffies(UCODE_TRACE_PERIOD));
 475         }
 476 }
 477
 478 static void iwl_bg_tx_flush(struct work_struct *work)
 479 {
 480         struct iwl_priv *priv =
 481                 container_of(work, struct iwl_priv, tx_flush);
 482
 483         if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
 484                 return;
 485
 486         /* do nothing if rf-kill is on */
 487         if (!iwl_is_ready_rf(priv->shrd))
 488                 return;
 489
 490         IWL_DEBUG_INFO(priv, "device request: flush all tx frames\n");
 491         iwlagn_dev_txfifo_flush(priv, IWL_DROP_ALL);
 492 }
 493
 494 void iwl_init_context(struct iwl_priv *priv, u32 ucode_flags)
 495 {
 496         int i;
 497
 498         /*
 499          * The default context is always valid,
 500          * the PAN context depends on uCode.
 501          */
 502         priv->shrd->valid_contexts = BIT(IWL_RXON_CTX_BSS);
 503         if (ucode_flags & IWL_UCODE_TLV_FLAGS_PAN)
 504                 priv->shrd->valid_contexts |= BIT(IWL_RXON_CTX_PAN);
 505
 506         for (i = 0; i < NUM_IWL_RXON_CTX; i++)
 507                 priv->contexts[i].ctxid = i;
 508
 509         priv->contexts[IWL_RXON_CTX_BSS].always_active = true;
 510         priv->contexts[IWL_RXON_CTX_BSS].is_active = true;
 511         priv->contexts[IWL_RXON_CTX_BSS].rxon_cmd = REPLY_RXON;
 512         priv->contexts[IWL_RXON_CTX_BSS].rxon_timing_cmd = REPLY_RXON_TIMING;
 513         priv->contexts[IWL_RXON_CTX_BSS].rxon_assoc_cmd = REPLY_RXON_ASSOC;
 514         priv->contexts[IWL_RXON_CTX_BSS].qos_cmd = REPLY_QOS_PARAM;
 515         priv->contexts[IWL_RXON_CTX_BSS].ap_sta_id = IWL_AP_ID;
 516         priv->contexts[IWL_RXON_CTX_BSS].wep_key_cmd = REPLY_WEPKEY;
 517         priv->contexts[IWL_RXON_CTX_BSS].bcast_sta_id = IWLAGN_BROADCAST_ID;
 518         priv->contexts[IWL_RXON_CTX_BSS].exclusive_interface_modes =
 519                 BIT(NL80211_IFTYPE_ADHOC);
 520         priv->contexts[IWL_RXON_CTX_BSS].interface_modes =
 521                 BIT(NL80211_IFTYPE_STATION);
 522         priv->contexts[IWL_RXON_CTX_BSS].ap_devtype = RXON_DEV_TYPE_AP;
 523         priv->contexts[IWL_RXON_CTX_BSS].ibss_devtype = RXON_DEV_TYPE_IBSS;
 524         priv->contexts[IWL_RXON_CTX_BSS].station_devtype = RXON_DEV_TYPE_ESS;
 525         priv->contexts[IWL_RXON_CTX_BSS].unused_devtype = RXON_DEV_TYPE_ESS;
 526
 527         priv->contexts[IWL_RXON_CTX_PAN].rxon_cmd = REPLY_WIPAN_RXON;
 528         priv->contexts[IWL_RXON_CTX_PAN].rxon_timing_cmd =
 529                 REPLY_WIPAN_RXON_TIMING;
 530         priv->contexts[IWL_RXON_CTX_PAN].rxon_assoc_cmd =
 531                 REPLY_WIPAN_RXON_ASSOC;
 532         priv->contexts[IWL_RXON_CTX_PAN].qos_cmd = REPLY_WIPAN_QOS_PARAM;
 533         priv->contexts[IWL_RXON_CTX_PAN].ap_sta_id = IWL_AP_ID_PAN;
 534         priv->contexts[IWL_RXON_CTX_PAN].wep_key_cmd = REPLY_WIPAN_WEPKEY;
 535         priv->contexts[IWL_RXON_CTX_PAN].bcast_sta_id = IWLAGN_PAN_BCAST_ID;
 536         priv->contexts[IWL_RXON_CTX_PAN].station_flags = STA_FLG_PAN_STATION;
 537         priv->contexts[IWL_RXON_CTX_PAN].interface_modes =
 538                 BIT(NL80211_IFTYPE_STATION) | BIT(NL80211_IFTYPE_AP);
 539
 540         if (ucode_flags & IWL_UCODE_TLV_FLAGS_P2P)
 541                 priv->contexts[IWL_RXON_CTX_PAN].interface_modes |=
 542                         BIT(NL80211_IFTYPE_P2P_CLIENT) |
 543                         BIT(NL80211_IFTYPE_P2P_GO);
 544
 545         priv->contexts[IWL_RXON_CTX_PAN].ap_devtype = RXON_DEV_TYPE_CP;
 546         priv->contexts[IWL_RXON_CTX_PAN].station_devtype = RXON_DEV_TYPE_2STA;
 547         priv->contexts[IWL_RXON_CTX_PAN].unused_devtype = RXON_DEV_TYPE_P2P;
 548
 549         BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
 550 }
 551
 552 static void iwl_rf_kill_ct_config(struct iwl_priv *priv)
 553 {
 554         struct iwl_ct_kill_config cmd;
 555         struct iwl_ct_kill_throttling_config adv_cmd;
 556         unsigned long flags;
 557         int ret = 0;
 558
 559         spin_lock_irqsave(&priv->shrd->lock, flags);
 560         iwl_write32(trans(priv), CSR_UCODE_DRV_GP1_CLR,
 561                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
 562         spin_unlock_irqrestore(&priv->shrd->lock, flags);
 563         priv->thermal_throttle.ct_kill_toggle = false;
 564
 565         if (cfg(priv)->base_params->support_ct_kill_exit) {
 566                 adv_cmd.critical_temperature_enter =
 567                         cpu_to_le32(hw_params(priv).ct_kill_threshold);
 568                 adv_cmd.critical_temperature_exit =
 569                         cpu_to_le32(hw_params(priv).ct_kill_exit_threshold);
 570
 571                 ret = iwl_trans_send_cmd_pdu(trans(priv),
 572                                        REPLY_CT_KILL_CONFIG_CMD,
 573                                        CMD_SYNC, sizeof(adv_cmd), &adv_cmd);
 574                 if (ret)
 575                         IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
 576                 else
 577                         IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
 578                                 "succeeded, critical temperature enter is %d,"
 579                                 "exit is %d\n",
 580                                 hw_params(priv).ct_kill_threshold,
 581                                 hw_params(priv).ct_kill_exit_threshold);
 582         } else {
 583                 cmd.critical_temperature_R =
 584                         cpu_to_le32(hw_params(priv).ct_kill_threshold);
 585
 586                 ret = iwl_trans_send_cmd_pdu(trans(priv),
 587                                        REPLY_CT_KILL_CONFIG_CMD,
 588                                        CMD_SYNC, sizeof(cmd), &cmd);
 589                 if (ret)
 590                         IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
 591                 else
 592                         IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
 593                                 "succeeded, "
 594                                 "critical temperature is %d\n",
 595                                 hw_params(priv).ct_kill_threshold);
 596         }
 597 }
 598
 599 static int iwlagn_send_calib_cfg_rt(struct iwl_priv *priv, u32 cfg)
 600 {
 601         struct iwl_calib_cfg_cmd calib_cfg_cmd;
 602         struct iwl_host_cmd cmd = {
 603                 .id = CALIBRATION_CFG_CMD,
 604                 .len = { sizeof(struct iwl_calib_cfg_cmd), },
 605                 .data = { &calib_cfg_cmd, },
 606         };
 607
 608         memset(&calib_cfg_cmd, 0, sizeof(calib_cfg_cmd));
 609         calib_cfg_cmd.ucd_calib_cfg.once.is_enable = IWL_CALIB_RT_CFG_ALL;
 610         calib_cfg_cmd.ucd_calib_cfg.once.start = cpu_to_le32(cfg);
 611
 612         return iwl_trans_send_cmd(trans(priv), &cmd);
 613 }
 614
 615
 616 static int iwlagn_send_tx_ant_config(struct iwl_priv *priv, u8 valid_tx_ant)
 617 {
 618         struct iwl_tx_ant_config_cmd tx_ant_cmd = {
 619           .valid = cpu_to_le32(valid_tx_ant),
 620         };
 621
 622         if (IWL_UCODE_API(nic(priv)->fw.ucode_ver) > 1) {
 623                 IWL_DEBUG_HC(priv, "select valid tx ant: %u\n", valid_tx_ant);
 624                 return iwl_trans_send_cmd_pdu(trans(priv),
 625                                         TX_ANT_CONFIGURATION_CMD,
 626                                         CMD_SYNC,
 627                                         sizeof(struct iwl_tx_ant_config_cmd),
 628                                         &tx_ant_cmd);
 629         } else {
 630                 IWL_DEBUG_HC(priv, "TX_ANT_CONFIGURATION_CMD not supported\n");
 631                 return -EOPNOTSUPP;
 632         }
 633 }
 634
 635 /**
 636  * iwl_alive_start - called after REPLY_ALIVE notification received
 637  *                   from protocol/runtime uCode (initialization uCode's
 638  *                   Alive gets handled by iwl_init_alive_start()).
 639  */
 640 int iwl_alive_start(struct iwl_priv *priv)
 641 {
 642         int ret = 0;
 643         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 644
 645         IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
 646
 647         /* After the ALIVE response, we can send host commands to the uCode */
 648         set_bit(STATUS_ALIVE, &priv->shrd->status);
 649
 650         /* Enable watchdog to monitor the driver tx queues */
 651         iwl_setup_watchdog(priv);
 652
 653         if (iwl_is_rfkill(priv->shrd))
 654                 return -ERFKILL;
 655
 656         if (priv->event_log.ucode_trace) {
 657                 /* start collecting data now */
 658                 mod_timer(&priv->ucode_trace, jiffies);
 659         }
 660
 661         /* download priority table before any calibration request */
 662         if (cfg(priv)->bt_params &&
 663             cfg(priv)->bt_params->advanced_bt_coexist) {
 664                 /* Configure Bluetooth device coexistence support */
 665                 if (cfg(priv)->bt_params->bt_sco_disable)
 666                         priv->bt_enable_pspoll = false;
 667                 else
 668                         priv->bt_enable_pspoll = true;
 669
 670                 priv->bt_valid = IWLAGN_BT_ALL_VALID_MSK;
 671                 priv->kill_ack_mask = IWLAGN_BT_KILL_ACK_MASK_DEFAULT;
 672                 priv->kill_cts_mask = IWLAGN_BT_KILL_CTS_MASK_DEFAULT;
 673                 iwlagn_send_advance_bt_config(priv);
 674                 priv->bt_valid = IWLAGN_BT_VALID_ENABLE_FLAGS;
 675                 priv->cur_rssi_ctx = NULL;
 676
 677                 iwl_send_prio_tbl(trans(priv));
 678
 679                 /* FIXME: w/a to force change uCode BT state machine */
 680                 ret = iwl_send_bt_env(trans(priv), IWL_BT_COEX_ENV_OPEN,
 681                                          BT_COEX_PRIO_TBL_EVT_INIT_CALIB2);
 682                 if (ret)
 683                         return ret;
 684                 ret = iwl_send_bt_env(trans(priv), IWL_BT_COEX_ENV_CLOSE,
 685                                          BT_COEX_PRIO_TBL_EVT_INIT_CALIB2);
 686                 if (ret)
 687                         return ret;
 688         } else {
 689                 /*
 690                  * default is 2-wire BT coexexistence support
 691                  */
 692                 iwl_send_bt_config(priv);
 693         }
 694
 695         /*
 696          * Perform runtime calibrations, including DC calibration.
 697          */
 698         iwlagn_send_calib_cfg_rt(priv, IWL_CALIB_CFG_DC_IDX);
 699
 700         ieee80211_wake_queues(priv->hw);
 701
 702         priv->active_rate = IWL_RATES_MASK;
 703
 704         /* Configure Tx antenna selection based on H/W config */
 705         iwlagn_send_tx_ant_config(priv, cfg(priv)->valid_tx_ant);
 706
 707         if (iwl_is_associated_ctx(ctx) && !priv->shrd->wowlan) {
 708                 struct iwl_rxon_cmd *active_rxon =
 709                                 (struct iwl_rxon_cmd *)&ctx->active;
 710                 /* apply any changes in staging */
 711                 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
 712                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
 713         } else {
 714                 struct iwl_rxon_context *tmp;
 715                 /* Initialize our rx_config data */
 716                 for_each_context(priv, tmp)
 717                         iwl_connection_init_rx_config(priv, tmp);
 718
 719                 iwlagn_set_rxon_chain(priv, ctx);
 720         }
 721
 722         if (!priv->shrd->wowlan) {
 723                 /* WoWLAN ucode will not reply in the same way, skip it */
 724                 iwl_reset_run_time_calib(priv);
 725         }
 726
 727         set_bit(STATUS_READY, &priv->shrd->status);
 728
 729         /* Configure the adapter for unassociated operation */
 730         ret = iwlagn_commit_rxon(priv, ctx);
 731         if (ret)
 732                 return ret;
 733
 734         /* At this point, the NIC is initialized and operational */
 735         iwl_rf_kill_ct_config(priv);
 736
 737         IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
 738
 739         return iwl_power_update_mode(priv, true);
 740 }
 741
 742 void iwl_down(struct iwl_priv *priv)
 743 {
 744         int exit_pending;
 745
 746         IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
 747
 748         lockdep_assert_held(&priv->shrd->mutex);
 749
 750         iwl_scan_cancel_timeout(priv, 200);
 751
 752         /*
 753          * If active, scanning won't cancel it, so say it expired.
 754          * No race since we hold the mutex here and a new one
 755          * can't come in at this time.
 756          */
 757         ieee80211_remain_on_channel_expired(priv->hw);
 758
 759         exit_pending =
 760                 test_and_set_bit(STATUS_EXIT_PENDING, &priv->shrd->status);
 761
 762         /* Stop TX queues watchdog. We need to have STATUS_EXIT_PENDING bit set
 763          * to prevent rearm timer */
 764         del_timer_sync(&priv->watchdog);
 765
 766         iwl_clear_ucode_stations(priv, NULL);
 767         iwl_dealloc_bcast_stations(priv);
 768         iwl_clear_driver_stations(priv);
 769
 770         /* reset BT coex data */
 771         priv->bt_status = 0;
 772         priv->cur_rssi_ctx = NULL;
 773         priv->bt_is_sco = 0;
 774         if (cfg(priv)->bt_params)
 775                 priv->bt_traffic_load =
 776                          cfg(priv)->bt_params->bt_init_traffic_load;
 777         else
 778                 priv->bt_traffic_load = 0;
 779         priv->bt_full_concurrent = false;
 780         priv->bt_ci_compliance = 0;
 781
 782         /* Wipe out the EXIT_PENDING status bit if we are not actually
 783          * exiting the module */
 784         if (!exit_pending)
 785                 clear_bit(STATUS_EXIT_PENDING, &priv->shrd->status);
 786
 787         if (priv->mac80211_registered)
 788                 ieee80211_stop_queues(priv->hw);
 789
 790         iwl_trans_stop_device(trans(priv));
 791
 792         /* Clear out all status bits but a few that are stable across reset */
 793         priv->shrd->status &=
 794                         test_bit(STATUS_RF_KILL_HW, &priv->shrd->status) <<
 795                                 STATUS_RF_KILL_HW |
 796                         test_bit(STATUS_GEO_CONFIGURED, &priv->shrd->status) <<
 797                                 STATUS_GEO_CONFIGURED |
 798                         test_bit(STATUS_FW_ERROR, &priv->shrd->status) <<
 799                                 STATUS_FW_ERROR |
 800                         test_bit(STATUS_EXIT_PENDING, &priv->shrd->status) <<
 801                                 STATUS_EXIT_PENDING;
 802
 803         dev_kfree_skb(priv->beacon_skb);
 804         priv->beacon_skb = NULL;
 805 }
 806
 807 /*****************************************************************************
 808  *
 809  * Workqueue callbacks
 810  *
 811  *****************************************************************************/
 812
 813 static void iwl_bg_run_time_calib_work(struct work_struct *work)
 814 {
 815         struct iwl_priv *priv = container_of(work, struct iwl_priv,
 816                         run_time_calib_work);
 817
 818         mutex_lock(&priv->shrd->mutex);
 819
 820         if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status) ||
 821             test_bit(STATUS_SCANNING, &priv->shrd->status)) {
 822                 mutex_unlock(&priv->shrd->mutex);
 823                 return;
 824         }
 825
 826         if (priv->start_calib) {
 827                 iwl_chain_noise_calibration(priv);
 828                 iwl_sensitivity_calibration(priv);
 829         }
 830
 831         mutex_unlock(&priv->shrd->mutex);
 832 }
 833
 834 void iwlagn_prepare_restart(struct iwl_priv *priv)
 835 {
 836         struct iwl_rxon_context *ctx;
 837         bool bt_full_concurrent;
 838         u8 bt_ci_compliance;
 839         u8 bt_load;
 840         u8 bt_status;
 841         bool bt_is_sco;
 842
 843         lockdep_assert_held(&priv->shrd->mutex);
 844
 845         for_each_context(priv, ctx)
 846                 ctx->vif = NULL;
 847         priv->is_open = 0;
 848
 849         /*
 850          * __iwl_down() will clear the BT status variables,
 851          * which is correct, but when we restart we really
 852          * want to keep them so restore them afterwards.
 853          *
 854          * The restart process will later pick them up and
 855          * re-configure the hw when we reconfigure the BT
 856          * command.
 857          */
 858         bt_full_concurrent = priv->bt_full_concurrent;
 859         bt_ci_compliance = priv->bt_ci_compliance;
 860         bt_load = priv->bt_traffic_load;
 861         bt_status = priv->bt_status;
 862         bt_is_sco = priv->bt_is_sco;
 863
 864         iwl_down(priv);
 865
 866         priv->bt_full_concurrent = bt_full_concurrent;
 867         priv->bt_ci_compliance = bt_ci_compliance;
 868         priv->bt_traffic_load = bt_load;
 869         priv->bt_status = bt_status;
 870         priv->bt_is_sco = bt_is_sco;
 871 }
 872
 873 static void iwl_bg_restart(struct work_struct *data)
 874 {
 875         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
 876
 877         if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
 878                 return;
 879
 880         if (test_and_clear_bit(STATUS_FW_ERROR, &priv->shrd->status)) {
 881                 mutex_lock(&priv->shrd->mutex);
 882                 iwlagn_prepare_restart(priv);
 883                 mutex_unlock(&priv->shrd->mutex);
 884                 iwl_cancel_deferred_work(priv);
 885                 ieee80211_restart_hw(priv->hw);
 886         } else {
 887                 WARN_ON(1);
 888         }
 889 }
 890
 891
 892
 893
 894 void iwlagn_disable_roc(struct iwl_priv *priv)
 895 {
 896         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_PAN];
 897
 898         lockdep_assert_held(&priv->shrd->mutex);
 899
 900         if (!priv->hw_roc_setup)
 901                 return;
 902
 903         ctx->staging.dev_type = RXON_DEV_TYPE_P2P;
 904         ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
 905
 906         priv->hw_roc_channel = NULL;
 907
 908         memset(ctx->staging.node_addr, 0, ETH_ALEN);
 909
 910         iwlagn_commit_rxon(priv, ctx);
 911
 912         ctx->is_active = false;
 913         priv->hw_roc_setup = false;
 914 }
 915
 916 static void iwlagn_disable_roc_work(struct work_struct *work)
 917 {
 918         struct iwl_priv *priv = container_of(work, struct iwl_priv,
 919                                              hw_roc_disable_work.work);
 920
 921         mutex_lock(&priv->shrd->mutex);
 922         iwlagn_disable_roc(priv);
 923         mutex_unlock(&priv->shrd->mutex);
 924 }
 925
 926 /*****************************************************************************
 927  *
 928  * driver setup and teardown
 929  *
 930  *****************************************************************************/
 931
 932 static void iwl_setup_deferred_work(struct iwl_priv *priv)
 933 {
 934         priv->workqueue = create_singlethread_workqueue(DRV_NAME);
 935
 936         init_waitqueue_head(&priv->shrd->wait_command_queue);
 937
 938         INIT_WORK(&priv->restart, iwl_bg_restart);
 939         INIT_WORK(&priv->beacon_update, iwl_bg_beacon_update);
 940         INIT_WORK(&priv->run_time_calib_work, iwl_bg_run_time_calib_work);
 941         INIT_WORK(&priv->tx_flush, iwl_bg_tx_flush);
 942         INIT_WORK(&priv->bt_full_concurrency, iwl_bg_bt_full_concurrency);
 943         INIT_WORK(&priv->bt_runtime_config, iwl_bg_bt_runtime_config);
 944         INIT_DELAYED_WORK(&priv->hw_roc_disable_work,
 945                           iwlagn_disable_roc_work);
 946
 947         iwl_setup_scan_deferred_work(priv);
 948
 949         if (cfg(priv)->lib->bt_setup_deferred_work)
 950                 cfg(priv)->lib->bt_setup_deferred_work(priv);
 951
 952         init_timer(&priv->statistics_periodic);
 953         priv->statistics_periodic.data = (unsigned long)priv;
 954         priv->statistics_periodic.function = iwl_bg_statistics_periodic;
 955
 956         init_timer(&priv->ucode_trace);
 957         priv->ucode_trace.data = (unsigned long)priv;
 958         priv->ucode_trace.function = iwl_bg_ucode_trace;
 959
 960         init_timer(&priv->watchdog);
 961         priv->watchdog.data = (unsigned long)priv;
 962         priv->watchdog.function = iwl_bg_watchdog;
 963 }
 964
 965 void iwl_cancel_deferred_work(struct iwl_priv *priv)
 966 {
 967         if (cfg(priv)->lib->cancel_deferred_work)
 968                 cfg(priv)->lib->cancel_deferred_work(priv);
 969
 970         cancel_work_sync(&priv->run_time_calib_work);
 971         cancel_work_sync(&priv->beacon_update);
 972
 973         iwl_cancel_scan_deferred_work(priv);
 974
 975         cancel_work_sync(&priv->bt_full_concurrency);
 976         cancel_work_sync(&priv->bt_runtime_config);
 977         cancel_delayed_work_sync(&priv->hw_roc_disable_work);
 978
 979         del_timer_sync(&priv->statistics_periodic);
 980         del_timer_sync(&priv->ucode_trace);
 981 }
 982
 983 static void iwl_init_hw_rates(struct iwl_priv *priv,
 984                               struct ieee80211_rate *rates)
 985 {
 986         int i;
 987
 988         for (i = 0; i < IWL_RATE_COUNT_LEGACY; i++) {
 989                 rates[i].bitrate = iwl_rates[i].ieee * 5;
 990                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
 991                 rates[i].hw_value_short = i;
 992                 rates[i].flags = 0;
 993                 if ((i >= IWL_FIRST_CCK_RATE) && (i <= IWL_LAST_CCK_RATE)) {
 994                         /*
 995                          * If CCK != 1M then set short preamble rate flag.
 996                          */
 997                         rates[i].flags |=
 998                                 (iwl_rates[i].plcp == IWL_RATE_1M_PLCP) ?
 999                                         0 : IEEE80211_RATE_SHORT_PREAMBLE;
1000                 }
1001         }
1002 }
1003
1004 static int iwl_init_drv(struct iwl_priv *priv)
1005 {
1006         int ret;
1007
1008         spin_lock_init(&priv->shrd->sta_lock);
1009
1010         mutex_init(&priv->shrd->mutex);
1011
1012         INIT_LIST_HEAD(&trans(priv)->calib_results);
1013
1014         priv->ieee_channels = NULL;
1015         priv->ieee_rates = NULL;
1016         priv->band = IEEE80211_BAND_2GHZ;
1017
1018         priv->iw_mode = NL80211_IFTYPE_STATION;
1019         priv->current_ht_config.smps = IEEE80211_SMPS_STATIC;
1020         priv->missed_beacon_threshold = IWL_MISSED_BEACON_THRESHOLD_DEF;
1021         priv->agg_tids_count = 0;
1022
1023         /* initialize force reset */
1024         priv->force_reset[IWL_RF_RESET].reset_duration =
1025                 IWL_DELAY_NEXT_FORCE_RF_RESET;
1026         priv->force_reset[IWL_FW_RESET].reset_duration =
1027                 IWL_DELAY_NEXT_FORCE_FW_RELOAD;
1028
1029         priv->rx_statistics_jiffies = jiffies;
1030
1031         /* Choose which receivers/antennas to use */
1032         iwlagn_set_rxon_chain(priv, &priv->contexts[IWL_RXON_CTX_BSS]);
1033
1034         iwl_init_scan_params(priv);
1035
1036         /* init bt coex */
1037         if (cfg(priv)->bt_params &&
1038             cfg(priv)->bt_params->advanced_bt_coexist) {
1039                 priv->kill_ack_mask = IWLAGN_BT_KILL_ACK_MASK_DEFAULT;
1040                 priv->kill_cts_mask = IWLAGN_BT_KILL_CTS_MASK_DEFAULT;
1041                 priv->bt_valid = IWLAGN_BT_ALL_VALID_MSK;
1042                 priv->bt_on_thresh = BT_ON_THRESHOLD_DEF;
1043                 priv->bt_duration = BT_DURATION_LIMIT_DEF;
1044                 priv->dynamic_frag_thresh = BT_FRAG_THRESHOLD_DEF;
1045         }
1046
1047         ret = iwl_init_channel_map(priv);
1048         if (ret) {
1049                 IWL_ERR(priv, "initializing regulatory failed: %d\n", ret);
1050                 goto err;
1051         }
1052
1053         ret = iwl_init_geos(priv);
1054         if (ret) {
1055                 IWL_ERR(priv, "initializing geos failed: %d\n", ret);
1056                 goto err_free_channel_map;
1057         }
1058         iwl_init_hw_rates(priv, priv->ieee_rates);
1059
1060         return 0;
1061
1062 err_free_channel_map:
1063         iwl_free_channel_map(priv);
1064 err:
1065         return ret;
1066 }
1067
1068 static void iwl_uninit_drv(struct iwl_priv *priv)
1069 {
1070         iwl_free_geos(priv);
1071         iwl_free_channel_map(priv);
1072         if (priv->tx_cmd_pool)
1073                 kmem_cache_destroy(priv->tx_cmd_pool);
1074         kfree(priv->scan_cmd);
1075         kfree(priv->beacon_cmd);
1076         kfree(rcu_dereference_raw(priv->noa_data));
1077 #ifdef CONFIG_IWLWIFI_DEBUGFS
1078         kfree(priv->wowlan_sram);
1079 #endif
1080 }
1081
1082 /* Size of one Rx buffer in host DRAM */
1083 #define IWL_RX_BUF_SIZE_4K (4 * 1024)
1084 #define IWL_RX_BUF_SIZE_8K (8 * 1024)
1085
1086 static void iwl_set_hw_params(struct iwl_priv *priv)
1087 {
1088         if (iwlagn_mod_params.amsdu_size_8K)
1089                 hw_params(priv).rx_page_order =
1090                         get_order(IWL_RX_BUF_SIZE_8K);
1091         else
1092                 hw_params(priv).rx_page_order =
1093                         get_order(IWL_RX_BUF_SIZE_4K);
1094
1095         if (iwlagn_mod_params.disable_11n & IWL_DISABLE_HT_ALL)
1096                 cfg(priv)->sku &= ~EEPROM_SKU_CAP_11N_ENABLE;
1097
1098         hw_params(priv).num_ampdu_queues =
1099                 cfg(priv)->base_params->num_of_ampdu_queues;
1100         hw_params(priv).shadow_reg_enable =
1101                 cfg(priv)->base_params->shadow_reg_enable;
1102         hw_params(priv).sku = cfg(priv)->sku;
1103         hw_params(priv).wd_timeout = cfg(priv)->base_params->wd_timeout;
1104
1105         /* Device-specific setup */
1106         cfg(priv)->lib->set_hw_params(priv);
1107 }
1108
1109
1110
1111 static void iwl_debug_config(struct iwl_priv *priv)
1112 {
1113         dev_printk(KERN_INFO, trans(priv)->dev, "CONFIG_IWLWIFI_DEBUG "
1114 #ifdef CONFIG_IWLWIFI_DEBUG
1115                 "enabled\n");
1116 #else
1117                 "disabled\n");
1118 #endif
1119         dev_printk(KERN_INFO, trans(priv)->dev, "CONFIG_IWLWIFI_DEBUGFS "
1120 #ifdef CONFIG_IWLWIFI_DEBUGFS
1121                 "enabled\n");
1122 #else
1123                 "disabled\n");
1124 #endif
1125         dev_printk(KERN_INFO, trans(priv)->dev, "CONFIG_IWLWIFI_DEVICE_TRACING "
1126 #ifdef CONFIG_IWLWIFI_DEVICE_TRACING
1127                 "enabled\n");
1128 #else
1129                 "disabled\n");
1130 #endif
1131
1132         dev_printk(KERN_INFO, trans(priv)->dev, "CONFIG_IWLWIFI_DEVICE_TESTMODE "
1133 #ifdef CONFIG_IWLWIFI_DEVICE_TESTMODE
1134                 "enabled\n");
1135 #else
1136                 "disabled\n");
1137 #endif
1138         dev_printk(KERN_INFO, trans(priv)->dev, "CONFIG_IWLWIFI_P2P "
1139 #ifdef CONFIG_IWLWIFI_P2P
1140                 "enabled\n");
1141 #else
1142                 "disabled\n");
1143 #endif
1144 }
1145
1146 static struct iwl_op_mode *iwl_op_mode_dvm_start(struct iwl_trans *trans)
1147 {
1148         struct iwl_fw *fw = &nic(trans)->fw;
1149         int err = 0;
1150         struct iwl_priv *priv;
1151         struct ieee80211_hw *hw;
1152         struct iwl_op_mode *op_mode;
1153         u16 num_mac;
1154         u32 ucode_flags;
1155
1156         /************************
1157          * 1. Allocating HW data
1158          ************************/
1159         hw = iwl_alloc_all();
1160         if (!hw) {
1161                 pr_err("%s: Cannot allocate network device\n",
1162                                 cfg(trans)->name);
1163                 err = -ENOMEM;
1164                 goto out;
1165         }
1166
1167         op_mode = hw->priv;
1168         op_mode->ops = &iwl_dvm_ops;
1169         priv = IWL_OP_MODE_GET_DVM(op_mode);
1170         priv->shrd = trans->shrd;
1171         priv->shrd->priv = priv;
1172
1173         iwl_trans_configure(trans(priv), op_mode);
1174
1175         /* At this point both hw and priv are allocated. */
1176
1177         SET_IEEE80211_DEV(priv->hw, trans(priv)->dev);
1178
1179         /* show what debugging capabilities we have */
1180         iwl_debug_config(priv);
1181
1182         IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
1183
1184         /* is antenna coupling more than 35dB ? */
1185         priv->bt_ant_couple_ok =
1186                 (iwlagn_mod_params.ant_coupling >
1187                         IWL_BT_ANTENNA_COUPLING_THRESHOLD) ?
1188                         true : false;
1189
1190         /* enable/disable bt channel inhibition */
1191         priv->bt_ch_announce = iwlagn_mod_params.bt_ch_announce;
1192         IWL_DEBUG_INFO(priv, "BT channel inhibition is %s\n",
1193                        (priv->bt_ch_announce) ? "On" : "Off");
1194
1195         if (iwl_alloc_traffic_mem(priv))
1196                 IWL_ERR(priv, "Not enough memory to generate traffic log\n");
1197
1198         /* these spin locks will be used in apm_ops.init and EEPROM access
1199          * we should init now
1200          */
1201         spin_lock_init(&trans(priv)->reg_lock);
1202         spin_lock_init(&priv->shrd->lock);
1203
1204         /***********************
1205          * 3. Read REV register
1206          ***********************/
1207         IWL_INFO(priv, "Detected %s, REV=0x%X\n",
1208                 cfg(priv)->name, trans(priv)->hw_rev);
1209
1210         err = iwl_trans_start_hw(trans(priv));
1211         if (err)
1212                 goto out_free_traffic_mem;
1213
1214         /*****************
1215          * 4. Read EEPROM
1216          *****************/
1217         /* Read the EEPROM */
1218         err = iwl_eeprom_init(priv, trans(priv)->hw_rev);
1219         /* Reset chip to save power until we load uCode during "up". */
1220         iwl_trans_stop_hw(trans(priv));
1221         if (err) {
1222                 IWL_ERR(priv, "Unable to init EEPROM\n");
1223                 goto out_free_traffic_mem;
1224         }
1225         err = iwl_eeprom_check_version(priv);
1226         if (err)
1227                 goto out_free_eeprom;
1228
1229         err = iwl_eeprom_check_sku(priv);
1230         if (err)
1231                 goto out_free_eeprom;
1232
1233         /* extract MAC Address */
1234         iwl_eeprom_get_mac(priv->shrd, priv->addresses[0].addr);
1235         IWL_DEBUG_INFO(priv, "MAC address: %pM\n", priv->addresses[0].addr);
1236         priv->hw->wiphy->addresses = priv->addresses;
1237         priv->hw->wiphy->n_addresses = 1;
1238         num_mac = iwl_eeprom_query16(priv->shrd, EEPROM_NUM_MAC_ADDRESS);
1239         if (num_mac > 1) {
1240                 memcpy(priv->addresses[1].addr, priv->addresses[0].addr,
1241                        ETH_ALEN);
1242                 priv->addresses[1].addr[5]++;
1243                 priv->hw->wiphy->n_addresses++;
1244         }
1245
1246         /************************
1247          * 5. Setup HW constants
1248          ************************/
1249         iwl_set_hw_params(priv);
1250
1251         ucode_flags = fw->ucode_capa.flags;
1252
1253 #ifndef CONFIG_IWLWIFI_P2P
1254         ucode_flags &= ~IWL_UCODE_TLV_FLAGS_PAN;
1255 #endif
1256         if (!(hw_params(priv).sku & EEPROM_SKU_CAP_IPAN_ENABLE))
1257                 ucode_flags &= ~IWL_UCODE_TLV_FLAGS_PAN;
1258
1259         /*
1260          * if not PAN, then don't support P2P -- might be a uCode
1261          * packaging bug or due to the eeprom check above
1262          */
1263         if (!(ucode_flags & IWL_UCODE_TLV_FLAGS_PAN))
1264                 ucode_flags &= ~IWL_UCODE_TLV_FLAGS_P2P;
1265
1266
1267         /*******************
1268          * 6. Setup priv
1269          *******************/
1270
1271         err = iwl_init_drv(priv);
1272         if (err)
1273                 goto out_free_eeprom;
1274         /* At this point both hw and priv are initialized. */
1275
1276         /********************
1277          * 7. Setup services
1278          ********************/
1279         iwl_setup_deferred_work(priv);
1280         iwl_setup_rx_handlers(priv);
1281         iwl_testmode_init(priv);
1282
1283         iwl_power_initialize(priv);
1284         iwl_tt_initialize(priv);
1285
1286         snprintf(priv->hw->wiphy->fw_version,
1287                  sizeof(priv->hw->wiphy->fw_version),
1288                  "%s", fw->fw_version);
1289
1290         priv->new_scan_threshold_behaviour =
1291                 !!(ucode_flags & IWL_UCODE_TLV_FLAGS_NEWSCAN);
1292
1293         if (ucode_flags & IWL_UCODE_TLV_FLAGS_PAN) {
1294                 priv->sta_key_max_num = STA_KEY_MAX_NUM_PAN;
1295                 priv->shrd->cmd_queue = IWL_IPAN_CMD_QUEUE_NUM;
1296         } else {
1297                 priv->sta_key_max_num = STA_KEY_MAX_NUM;
1298                 priv->shrd->cmd_queue = IWL_DEFAULT_CMD_QUEUE_NUM;
1299         }
1300
1301         priv->phy_calib_chain_noise_reset_cmd =
1302                 fw->ucode_capa.standard_phy_calibration_size;
1303         priv->phy_calib_chain_noise_gain_cmd =
1304                 fw->ucode_capa.standard_phy_calibration_size + 1;
1305
1306         /* initialize all valid contexts */
1307         iwl_init_context(priv, ucode_flags);
1308
1309         /**************************************************
1310          * This is still part of probe() in a sense...
1311          *
1312          * 9. Setup and register with mac80211 and debugfs
1313          **************************************************/
1314         err = iwlagn_mac_setup_register(priv, &fw->ucode_capa);
1315         if (err)
1316                 goto out_destroy_workqueue;
1317
1318         err = iwl_dbgfs_register(priv, DRV_NAME);
1319         if (err)
1320                 IWL_ERR(priv,
1321                         "failed to create debugfs files. Ignoring error: %d\n",
1322                         err);
1323
1324         return op_mode;
1325
1326 out_destroy_workqueue:
1327         destroy_workqueue(priv->workqueue);
1328         priv->workqueue = NULL;
1329         iwl_uninit_drv(priv);
1330 out_free_eeprom:
1331         iwl_eeprom_free(priv->shrd);
1332 out_free_traffic_mem:
1333         iwl_free_traffic_mem(priv);
1334         ieee80211_free_hw(priv->hw);
1335 out:
1336         op_mode = NULL;
1337         return op_mode;
1338 }
1339
1340 static void iwl_op_mode_dvm_stop(struct iwl_op_mode *op_mode)
1341 {
1342         struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
1343
1344         wait_for_completion(&nic(priv)->request_firmware_complete);
1345
1346         IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
1347
1348         iwl_dbgfs_unregister(priv);
1349
1350         /* ieee80211_unregister_hw call wil cause iwlagn_mac_stop to
1351          * to be called and iwl_down since we are removing the device
1352          * we need to set STATUS_EXIT_PENDING bit.
1353          */
1354         set_bit(STATUS_EXIT_PENDING, &priv->shrd->status);
1355
1356         iwl_testmode_cleanup(priv);
1357         iwlagn_mac_unregister(priv);
1358
1359         iwl_tt_exit(priv);
1360
1361         /*This will stop the queues, move the device to low power state */
1362         iwl_trans_stop_device(trans(priv));
1363
1364         iwl_dealloc_ucode(nic(priv));
1365
1366         iwl_eeprom_free(priv->shrd);
1367
1368         /*netif_stop_queue(dev); */
1369         flush_workqueue(priv->workqueue);
1370
1371         /* ieee80211_unregister_hw calls iwlagn_mac_stop, which flushes
1372          * priv->workqueue... so we can't take down the workqueue
1373          * until now... */
1374         destroy_workqueue(priv->workqueue);
1375         priv->workqueue = NULL;
1376         iwl_free_traffic_mem(priv);
1377
1378         iwl_uninit_drv(priv);
1379
1380         dev_kfree_skb(priv->beacon_skb);
1381
1382         ieee80211_free_hw(priv->hw);
1383 }
1384
1385 const struct iwl_op_mode_ops iwl_dvm_ops = {
1386         .start = iwl_op_mode_dvm_start,
1387         .stop = iwl_op_mode_dvm_stop,
1388         .rx = iwl_rx_dispatch,
1389         .free_skb = iwl_free_skb,
1390 };
1391
1392 /*****************************************************************************
1393  *
1394  * driver and module entry point
1395  *
1396  *****************************************************************************/
1397 static int __init iwl_init(void)
1398 {
1399
1400         int ret;
1401         pr_info(DRV_DESCRIPTION ", " DRV_VERSION "\n");
1402         pr_info(DRV_COPYRIGHT "\n");
1403
1404         ret = iwlagn_rate_control_register();
1405         if (ret) {
1406                 pr_err("Unable to register rate control algorithm: %d\n", ret);
1407                 return ret;
1408         }
1409
1410         ret = iwl_pci_register_driver();
1411
1412         if (ret)
1413                 goto error_register;
1414         return ret;
1415
1416 error_register:
1417         iwlagn_rate_control_unregister();
1418         return ret;
1419 }
1420
1421 static void __exit iwl_exit(void)
1422 {
1423         iwl_pci_unregister_driver();
1424         iwlagn_rate_control_unregister();
1425 }
1426
1427 module_exit(iwl_exit);
1428 module_init(iwl_init);
1429
1430 #ifdef CONFIG_IWLWIFI_DEBUG
1431 module_param_named(debug, iwlagn_mod_params.debug_level, uint,
1432                    S_IRUGO | S_IWUSR);
1433 MODULE_PARM_DESC(debug, "debug output mask");
1434 #endif
1435
1436 module_param_named(swcrypto, iwlagn_mod_params.sw_crypto, int, S_IRUGO);
1437 MODULE_PARM_DESC(swcrypto, "using crypto in software (default 0 [hardware])");
1438 module_param_named(queues_num, iwlagn_mod_params.num_of_queues, int, S_IRUGO);
1439 MODULE_PARM_DESC(queues_num, "number of hw queues.");
1440 module_param_named(11n_disable, iwlagn_mod_params.disable_11n, uint, S_IRUGO);
1441 MODULE_PARM_DESC(11n_disable,
1442         "disable 11n functionality, bitmap: 1: full, 2: agg TX, 4: agg RX");
1443 module_param_named(amsdu_size_8K, iwlagn_mod_params.amsdu_size_8K,
1444                    int, S_IRUGO);
1445 MODULE_PARM_DESC(amsdu_size_8K, "enable 8K amsdu size");
1446 module_param_named(fw_restart, iwlagn_mod_params.restart_fw, int, S_IRUGO);
1447 MODULE_PARM_DESC(fw_restart, "restart firmware in case of error");
1448
1449 module_param_named(ucode_alternative,
1450                    iwlagn_mod_params.wanted_ucode_alternative,
1451                    int, S_IRUGO);
1452 MODULE_PARM_DESC(ucode_alternative,
1453                  "specify ucode alternative to use from ucode file");
1454
1455 module_param_named(antenna_coupling, iwlagn_mod_params.ant_coupling,
1456                    int, S_IRUGO);
1457 MODULE_PARM_DESC(antenna_coupling,
1458                  "specify antenna coupling in dB (defualt: 0 dB)");
1459
1460 module_param_named(bt_ch_inhibition, iwlagn_mod_params.bt_ch_announce,
1461                    bool, S_IRUGO);
1462 MODULE_PARM_DESC(bt_ch_inhibition,
1463                  "Enable BT channel inhibition (default: enable)");
1464
1465 module_param_named(plcp_check, iwlagn_mod_params.plcp_check, bool, S_IRUGO);
1466 MODULE_PARM_DESC(plcp_check, "Check plcp health (default: 1 [enabled])");
1467
1468 module_param_named(ack_check, iwlagn_mod_params.ack_check, bool, S_IRUGO);
1469 MODULE_PARM_DESC(ack_check, "Check ack health (default: 0 [disabled])");
1470
1471 module_param_named(wd_disable, iwlagn_mod_params.wd_disable, int, S_IRUGO);
1472 MODULE_PARM_DESC(wd_disable,
1473                 "Disable stuck queue watchdog timer 0=system default, "
1474                 "1=disable, 2=enable (default: 0)");
1475
1476 /*
1477  * set bt_coex_active to true, uCode will do kill/defer
1478  * every time the priority line is asserted (BT is sending signals on the
1479  * priority line in the PCIx).
1480  * set bt_coex_active to false, uCode will ignore the BT activity and
1481  * perform the normal operation
1482  *
1483  * User might experience transmit issue on some platform due to WiFi/BT
1484  * co-exist problem. The possible behaviors are:
1485  *   Able to scan and finding all the available AP
1486  *   Not able to associate with any AP
1487  * On those platforms, WiFi communication can be restored by set
1488  * "bt_coex_active" module parameter to "false"
1489  *
1490  * default: bt_coex_active = true (BT_COEX_ENABLE)
1491  */
1492 module_param_named(bt_coex_active, iwlagn_mod_params.bt_coex_active,
1493                 bool, S_IRUGO);
1494 MODULE_PARM_DESC(bt_coex_active, "enable wifi/bt co-exist (default: enable)");
1495
1496 module_param_named(led_mode, iwlagn_mod_params.led_mode, int, S_IRUGO);
1497 MODULE_PARM_DESC(led_mode, "0=system default, "
1498                 "1=On(RF On)/Off(RF Off), 2=blinking, 3=Off (default: 0)");
1499
1500 module_param_named(power_save, iwlagn_mod_params.power_save,
1501                 bool, S_IRUGO);
1502 MODULE_PARM_DESC(power_save,
1503                  "enable WiFi power management (default: disable)");
1504
1505 module_param_named(power_level, iwlagn_mod_params.power_level,
1506                 int, S_IRUGO);
1507 MODULE_PARM_DESC(power_level,
1508                  "default power save level (range from 1 - 5, default: 1)");
1509
1510 module_param_named(auto_agg, iwlagn_mod_params.auto_agg,
1511                 bool, S_IRUGO);
1512 MODULE_PARM_DESC(auto_agg,
1513                  "enable agg w/o check traffic load (default: enable)");
1514
1515 /*
1516  * For now, keep using power level 1 instead of automatically
1517  * adjusting ...
1518  */
1519 module_param_named(no_sleep_autoadjust, iwlagn_mod_params.no_sleep_autoadjust,
1520                 bool, S_IRUGO);
1521 MODULE_PARM_DESC(no_sleep_autoadjust,
1522                  "don't automatically adjust sleep level "
1523                  "according to maximum network latency (default: true)");