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