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-eeprom.h"
  45 #include "iwl-dev.h"
  46 #include "iwl-core.h"
  47 #include "iwl-io.h"
  48 #include "iwl-agn-calib.h"
  49 #include "iwl-agn.h"
  50 #include "iwl-shared.h"
  51 #include "iwl-trans.h"
  52 #include "iwl-op-mode.h"
  53
  54 /******************************************************************************
  55  *
  56  * module boiler plate
  57  *
  58  ******************************************************************************/
  59
  60 /*
  61  * module name, copyright, version, etc.
  62  */
  63 #define DRV_DESCRIPTION "Intel(R) Wireless WiFi Link AGN driver for Linux"
  64
  65 #ifdef CONFIG_IWLWIFI_DEBUG
  66 #define VD "d"
  67 #else
  68 #define VD
  69 #endif
  70
  71 #define DRV_VERSION     IWLWIFI_VERSION VD
  72
  73
  74 MODULE_DESCRIPTION(DRV_DESCRIPTION);
  75 MODULE_VERSION(DRV_VERSION);
  76 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
  77 MODULE_LICENSE("GPL");
  78 MODULE_ALIAS("iwlagn");
  79
  80 void iwl_update_chain_flags(struct iwl_priv *priv)
  81 {
  82         struct iwl_rxon_context *ctx;
  83
  84         for_each_context(priv, ctx) {
  85                 iwlagn_set_rxon_chain(priv, ctx);
  86                 if (ctx->active.rx_chain != ctx->staging.rx_chain)
  87                         iwlagn_commit_rxon(priv, ctx);
  88         }
  89 }
  90
  91 /* Parse the beacon frame to find the TIM element and set tim_idx & tim_size */
  92 static void iwl_set_beacon_tim(struct iwl_priv *priv,
  93                                struct iwl_tx_beacon_cmd *tx_beacon_cmd,
  94                                u8 *beacon, u32 frame_size)
  95 {
  96         u16 tim_idx;
  97         struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)beacon;
  98
  99         /*
 100          * The index is relative to frame start but we start looking at the
 101          * variable-length part of the beacon.
 102          */
 103         tim_idx = mgmt->u.beacon.variable - beacon;
 104
 105         /* Parse variable-length elements of beacon to find WLAN_EID_TIM */
 106         while ((tim_idx < (frame_size - 2)) &&
 107                         (beacon[tim_idx] != WLAN_EID_TIM))
 108                 tim_idx += beacon[tim_idx+1] + 2;
 109
 110         /* If TIM field was found, set variables */
 111         if ((tim_idx < (frame_size - 1)) && (beacon[tim_idx] == WLAN_EID_TIM)) {
 112                 tx_beacon_cmd->tim_idx = cpu_to_le16(tim_idx);
 113                 tx_beacon_cmd->tim_size = beacon[tim_idx+1];
 114         } else
 115                 IWL_WARN(priv, "Unable to find TIM Element in beacon\n");
 116 }
 117
 118 int iwlagn_send_beacon_cmd(struct iwl_priv *priv)
 119 {
 120         struct iwl_tx_beacon_cmd *tx_beacon_cmd;
 121         struct iwl_host_cmd cmd = {
 122                 .id = REPLY_TX_BEACON,
 123                 .flags = CMD_SYNC,
 124         };
 125         struct ieee80211_tx_info *info;
 126         u32 frame_size;
 127         u32 rate_flags;
 128         u32 rate;
 129
 130         /*
 131          * We have to set up the TX command, the TX Beacon command, and the
 132          * beacon contents.
 133          */
 134
 135         lockdep_assert_held(&priv->mutex);
 136
 137         if (!priv->beacon_ctx) {
 138                 IWL_ERR(priv, "trying to build beacon w/o beacon context!\n");
 139                 return 0;
 140         }
 141
 142         if (WARN_ON(!priv->beacon_skb))
 143                 return -EINVAL;
 144
 145         /* Allocate beacon command */
 146         if (!priv->beacon_cmd)
 147                 priv->beacon_cmd = kzalloc(sizeof(*tx_beacon_cmd), GFP_KERNEL);
 148         tx_beacon_cmd = priv->beacon_cmd;
 149         if (!tx_beacon_cmd)
 150                 return -ENOMEM;
 151
 152         frame_size = priv->beacon_skb->len;
 153
 154         /* Set up TX command fields */
 155         tx_beacon_cmd->tx.len = cpu_to_le16((u16)frame_size);
 156         tx_beacon_cmd->tx.sta_id = priv->beacon_ctx->bcast_sta_id;
 157         tx_beacon_cmd->tx.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE;
 158         tx_beacon_cmd->tx.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK |
 159                 TX_CMD_FLG_TSF_MSK | TX_CMD_FLG_STA_RATE_MSK;
 160
 161         /* Set up TX beacon command fields */
 162         iwl_set_beacon_tim(priv, tx_beacon_cmd, priv->beacon_skb->data,
 163                            frame_size);
 164
 165         /* Set up packet rate and flags */
 166         info = IEEE80211_SKB_CB(priv->beacon_skb);
 167
 168         /*
 169          * Let's set up the rate at least somewhat correctly;
 170          * it will currently not actually be used by the uCode,
 171          * it uses the broadcast station's rate instead.
 172          */
 173         if (info->control.rates[0].idx < 0 ||
 174             info->control.rates[0].flags & IEEE80211_TX_RC_MCS)
 175                 rate = 0;
 176         else
 177                 rate = info->control.rates[0].idx;
 178
 179         priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant,
 180                                               hw_params(priv).valid_tx_ant);
 181         rate_flags = iwl_ant_idx_to_flags(priv->mgmt_tx_ant);
 182
 183         /* In mac80211, rates for 5 GHz start at 0 */
 184         if (info->band == IEEE80211_BAND_5GHZ)
 185                 rate += IWL_FIRST_OFDM_RATE;
 186         else if (rate >= IWL_FIRST_CCK_RATE && rate <= IWL_LAST_CCK_RATE)
 187                 rate_flags |= RATE_MCS_CCK_MSK;
 188
 189         tx_beacon_cmd->tx.rate_n_flags =
 190                         iwl_hw_set_rate_n_flags(rate, rate_flags);
 191
 192         /* Submit command */
 193         cmd.len[0] = sizeof(*tx_beacon_cmd);
 194         cmd.data[0] = tx_beacon_cmd;
 195         cmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY;
 196         cmd.len[1] = frame_size;
 197         cmd.data[1] = priv->beacon_skb->data;
 198         cmd.dataflags[1] = IWL_HCMD_DFL_NOCOPY;
 199
 200         return iwl_dvm_send_cmd(priv, &cmd);
 201 }
 202
 203 static void iwl_bg_beacon_update(struct work_struct *work)
 204 {
 205         struct iwl_priv *priv =
 206                 container_of(work, struct iwl_priv, beacon_update);
 207         struct sk_buff *beacon;
 208
 209         mutex_lock(&priv->mutex);
 210         if (!priv->beacon_ctx) {
 211                 IWL_ERR(priv, "updating beacon w/o beacon context!\n");
 212                 goto out;
 213         }
 214
 215         if (priv->beacon_ctx->vif->type != NL80211_IFTYPE_AP) {
 216                 /*
 217                  * The ucode will send beacon notifications even in
 218                  * IBSS mode, but we don't want to process them. But
 219                  * we need to defer the type check to here due to
 220                  * requiring locking around the beacon_ctx access.
 221                  */
 222                 goto out;
 223         }
 224
 225         /* Pull updated AP beacon from mac80211. will fail if not in AP mode */
 226         beacon = ieee80211_beacon_get(priv->hw, priv->beacon_ctx->vif);
 227         if (!beacon) {
 228                 IWL_ERR(priv, "update beacon failed -- keeping old\n");
 229                 goto out;
 230         }
 231
 232         /* new beacon skb is allocated every time; dispose previous.*/
 233         dev_kfree_skb(priv->beacon_skb);
 234
 235         priv->beacon_skb = beacon;
 236
 237         iwlagn_send_beacon_cmd(priv);
 238  out:
 239         mutex_unlock(&priv->mutex);
 240 }
 241
 242 static void iwl_bg_bt_runtime_config(struct work_struct *work)
 243 {
 244         struct iwl_priv *priv =
 245                 container_of(work, struct iwl_priv, bt_runtime_config);
 246
 247         if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
 248                 return;
 249
 250         /* dont send host command if rf-kill is on */
 251         if (!iwl_is_ready_rf(priv->shrd))
 252                 return;
 253         iwlagn_send_advance_bt_config(priv);
 254 }
 255
 256 static void iwl_bg_bt_full_concurrency(struct work_struct *work)
 257 {
 258         struct iwl_priv *priv =
 259                 container_of(work, struct iwl_priv, bt_full_concurrency);
 260         struct iwl_rxon_context *ctx;
 261
 262         mutex_lock(&priv->mutex);
 263
 264         if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
 265                 goto out;
 266
 267         /* dont send host command if rf-kill is on */
 268         if (!iwl_is_ready_rf(priv->shrd))
 269                 goto out;
 270
 271         IWL_DEBUG_INFO(priv, "BT coex in %s mode\n",
 272                        priv->bt_full_concurrent ?
 273                        "full concurrency" : "3-wire");
 274
 275         /*
 276          * LQ & RXON updated cmds must be sent before BT Config cmd
 277          * to avoid 3-wire collisions
 278          */
 279         for_each_context(priv, ctx) {
 280                 iwlagn_set_rxon_chain(priv, ctx);
 281                 iwlagn_commit_rxon(priv, ctx);
 282         }
 283
 284         iwlagn_send_advance_bt_config(priv);
 285 out:
 286         mutex_unlock(&priv->mutex);
 287 }
 288
 289 /**
 290  * iwl_bg_statistics_periodic - Timer callback to queue statistics
 291  *
 292  * This callback is provided in order to send a statistics request.
 293  *
 294  * This timer function is continually reset to execute within
 295  * REG_RECALIB_PERIOD seconds since the last STATISTICS_NOTIFICATION
 296  * was received.  We need to ensure we receive the statistics in order
 297  * to update the temperature used for calibrating the TXPOWER.
 298  */
 299 static void iwl_bg_statistics_periodic(unsigned long data)
 300 {
 301         struct iwl_priv *priv = (struct iwl_priv *)data;
 302
 303         if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
 304                 return;
 305
 306         /* dont send host command if rf-kill is on */
 307         if (!iwl_is_ready_rf(priv->shrd))
 308                 return;
 309
 310         iwl_send_statistics_request(priv, CMD_ASYNC, false);
 311 }
 312
 313
 314 static void iwl_print_cont_event_trace(struct iwl_priv *priv, u32 base,
 315                                         u32 start_idx, u32 num_events,
 316                                         u32 capacity, u32 mode)
 317 {
 318         u32 i;
 319         u32 ptr;        /* SRAM byte address of log data */
 320         u32 ev, time, data; /* event log data */
 321         unsigned long reg_flags;
 322
 323         if (mode == 0)
 324                 ptr = base + (4 * sizeof(u32)) + (start_idx * 2 * sizeof(u32));
 325         else
 326                 ptr = base + (4 * sizeof(u32)) + (start_idx * 3 * sizeof(u32));
 327
 328         /* Make sure device is powered up for SRAM reads */
 329         spin_lock_irqsave(&trans(priv)->reg_lock, reg_flags);
 330         if (iwl_grab_nic_access(trans(priv))) {
 331                 spin_unlock_irqrestore(&trans(priv)->reg_lock, reg_flags);
 332                 return;
 333         }
 334
 335         /* Set starting address; reads will auto-increment */
 336         iwl_write32(trans(priv), HBUS_TARG_MEM_RADDR, ptr);
 337         rmb();
 338
 339         /*
 340          * Refuse to read more than would have fit into the log from
 341          * the current start_idx. This used to happen due to the race
 342          * described below, but now WARN because the code below should
 343          * prevent it from happening here.
 344          */
 345         if (WARN_ON(num_events > capacity - start_idx))
 346                 num_events = capacity - start_idx;
 347
 348         /*
 349          * "time" is actually "data" for mode 0 (no timestamp).
 350          * place event id # at far right for easier visual parsing.
 351          */
 352         for (i = 0; i < num_events; i++) {
 353                 ev = iwl_read32(trans(priv), HBUS_TARG_MEM_RDAT);
 354                 time = iwl_read32(trans(priv), HBUS_TARG_MEM_RDAT);
 355                 if (mode == 0) {
 356                         trace_iwlwifi_dev_ucode_cont_event(
 357                                         trans(priv)->dev, 0, time, ev);
 358                 } else {
 359                         data = iwl_read32(trans(priv), HBUS_TARG_MEM_RDAT);
 360                         trace_iwlwifi_dev_ucode_cont_event(
 361                                         trans(priv)->dev, time, data, ev);
 362                 }
 363         }
 364         /* Allow device to power down */
 365         iwl_release_nic_access(trans(priv));
 366         spin_unlock_irqrestore(&trans(priv)->reg_lock, reg_flags);
 367 }
 368
 369 static void iwl_continuous_event_trace(struct iwl_priv *priv)
 370 {
 371         u32 capacity;   /* event log capacity in # entries */
 372         struct {
 373                 u32 capacity;
 374                 u32 mode;
 375                 u32 wrap_counter;
 376                 u32 write_counter;
 377         } __packed read;
 378         u32 base;       /* SRAM byte address of event log header */
 379         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
 380         u32 num_wraps;  /* # times uCode wrapped to top of log */
 381         u32 next_entry; /* index of next entry to be written by uCode */
 382
 383         base = priv->shrd->device_pointers.log_event_table;
 384         if (iwlagn_hw_valid_rtc_data_addr(base)) {
 385                 iwl_read_targ_mem_words(trans(priv), base, &read, sizeof(read));
 386
 387                 capacity = read.capacity;
 388                 mode = read.mode;
 389                 num_wraps = read.wrap_counter;
 390                 next_entry = read.write_counter;
 391         } else
 392                 return;
 393
 394         /*
 395          * Unfortunately, the uCode doesn't use temporary variables.
 396          * Therefore, it can happen that we read next_entry == capacity,
 397          * which really means next_entry == 0.
 398          */
 399         if (unlikely(next_entry == capacity))
 400                 next_entry = 0;
 401         /*
 402          * Additionally, the uCode increases the write pointer before
 403          * the wraps counter, so if the write pointer is smaller than
 404          * the old write pointer (wrap occurred) but we read that no
 405          * wrap occurred, we actually read between the next_entry and
 406          * num_wraps update (this does happen in practice!!) -- take
 407          * that into account by increasing num_wraps.
 408          */
 409         if (unlikely(next_entry < priv->event_log.next_entry &&
 410                      num_wraps == priv->event_log.num_wraps))
 411                 num_wraps++;
 412
 413         if (num_wraps == priv->event_log.num_wraps) {
 414                 iwl_print_cont_event_trace(
 415                         priv, base, priv->event_log.next_entry,
 416                         next_entry - priv->event_log.next_entry,
 417                         capacity, mode);
 418
 419                 priv->event_log.non_wraps_count++;
 420         } else {
 421                 if (num_wraps - priv->event_log.num_wraps > 1)
 422                         priv->event_log.wraps_more_count++;
 423                 else
 424                         priv->event_log.wraps_once_count++;
 425
 426                 trace_iwlwifi_dev_ucode_wrap_event(trans(priv)->dev,
 427                                 num_wraps - priv->event_log.num_wraps,
 428                                 next_entry, priv->event_log.next_entry);
 429
 430                 if (next_entry < priv->event_log.next_entry) {
 431                         iwl_print_cont_event_trace(
 432                                 priv, base, priv->event_log.next_entry,
 433                                 capacity - priv->event_log.next_entry,
 434                                 capacity, mode);
 435
 436                         iwl_print_cont_event_trace(
 437                                 priv, base, 0, next_entry, capacity, mode);
 438                 } else {
 439                         iwl_print_cont_event_trace(
 440                                 priv, base, next_entry,
 441                                 capacity - next_entry,
 442                                 capacity, mode);
 443
 444                         iwl_print_cont_event_trace(
 445                                 priv, base, 0, next_entry, capacity, mode);
 446                 }
 447         }
 448
 449         priv->event_log.num_wraps = num_wraps;
 450         priv->event_log.next_entry = next_entry;
 451 }
 452
 453 /**
 454  * iwl_bg_ucode_trace - Timer callback to log ucode event
 455  *
 456  * The timer is continually set to execute every
 457  * UCODE_TRACE_PERIOD milliseconds after the last timer expired
 458  * this function is to perform continuous uCode event logging operation
 459  * if enabled
 460  */
 461 static void iwl_bg_ucode_trace(unsigned long data)
 462 {
 463         struct iwl_priv *priv = (struct iwl_priv *)data;
 464
 465         if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
 466                 return;
 467
 468         if (priv->event_log.ucode_trace) {
 469                 iwl_continuous_event_trace(priv);
 470                 /* Reschedule the timer to occur in UCODE_TRACE_PERIOD */
 471                 mod_timer(&priv->ucode_trace,
 472                          jiffies + msecs_to_jiffies(UCODE_TRACE_PERIOD));
 473         }
 474 }
 475
 476 static void iwl_bg_tx_flush(struct work_struct *work)
 477 {
 478         struct iwl_priv *priv =
 479                 container_of(work, struct iwl_priv, tx_flush);
 480
 481         if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
 482                 return;
 483
 484         /* do nothing if rf-kill is on */
 485         if (!iwl_is_ready_rf(priv->shrd))
 486                 return;
 487
 488         IWL_DEBUG_INFO(priv, "device request: flush all tx frames\n");
 489         iwlagn_dev_txfifo_flush(priv, IWL_DROP_ALL);
 490 }
 491
 492 void iwl_init_context(struct iwl_priv *priv, u32 ucode_flags)
 493 {
 494         int i;
 495
 496         /*
 497          * The default context is always valid,
 498          * the PAN context depends on uCode.
 499          */
 500         priv->shrd->valid_contexts = BIT(IWL_RXON_CTX_BSS);
 501         if (ucode_flags & IWL_UCODE_TLV_FLAGS_PAN)
 502                 priv->shrd->valid_contexts |= BIT(IWL_RXON_CTX_PAN);
 503
 504         for (i = 0; i < NUM_IWL_RXON_CTX; i++)
 505                 priv->contexts[i].ctxid = i;
 506
 507         priv->contexts[IWL_RXON_CTX_BSS].always_active = true;
 508         priv->contexts[IWL_RXON_CTX_BSS].is_active = true;
 509         priv->contexts[IWL_RXON_CTX_BSS].rxon_cmd = REPLY_RXON;
 510         priv->contexts[IWL_RXON_CTX_BSS].rxon_timing_cmd = REPLY_RXON_TIMING;
 511         priv->contexts[IWL_RXON_CTX_BSS].rxon_assoc_cmd = REPLY_RXON_ASSOC;
 512         priv->contexts[IWL_RXON_CTX_BSS].qos_cmd = REPLY_QOS_PARAM;
 513         priv->contexts[IWL_RXON_CTX_BSS].ap_sta_id = IWL_AP_ID;
 514         priv->contexts[IWL_RXON_CTX_BSS].wep_key_cmd = REPLY_WEPKEY;
 515         priv->contexts[IWL_RXON_CTX_BSS].bcast_sta_id = IWLAGN_BROADCAST_ID;
 516         priv->contexts[IWL_RXON_CTX_BSS].exclusive_interface_modes =
 517                 BIT(NL80211_IFTYPE_ADHOC);
 518         priv->contexts[IWL_RXON_CTX_BSS].interface_modes =
 519                 BIT(NL80211_IFTYPE_STATION);
 520         priv->contexts[IWL_RXON_CTX_BSS].ap_devtype = RXON_DEV_TYPE_AP;
 521         priv->contexts[IWL_RXON_CTX_BSS].ibss_devtype = RXON_DEV_TYPE_IBSS;
 522         priv->contexts[IWL_RXON_CTX_BSS].station_devtype = RXON_DEV_TYPE_ESS;
 523         priv->contexts[IWL_RXON_CTX_BSS].unused_devtype = RXON_DEV_TYPE_ESS;
 524
 525         priv->contexts[IWL_RXON_CTX_PAN].rxon_cmd = REPLY_WIPAN_RXON;
 526         priv->contexts[IWL_RXON_CTX_PAN].rxon_timing_cmd =
 527                 REPLY_WIPAN_RXON_TIMING;
 528         priv->contexts[IWL_RXON_CTX_PAN].rxon_assoc_cmd =
 529                 REPLY_WIPAN_RXON_ASSOC;
 530         priv->contexts[IWL_RXON_CTX_PAN].qos_cmd = REPLY_WIPAN_QOS_PARAM;
 531         priv->contexts[IWL_RXON_CTX_PAN].ap_sta_id = IWL_AP_ID_PAN;
 532         priv->contexts[IWL_RXON_CTX_PAN].wep_key_cmd = REPLY_WIPAN_WEPKEY;
 533         priv->contexts[IWL_RXON_CTX_PAN].bcast_sta_id = IWLAGN_PAN_BCAST_ID;
 534         priv->contexts[IWL_RXON_CTX_PAN].station_flags = STA_FLG_PAN_STATION;
 535         priv->contexts[IWL_RXON_CTX_PAN].interface_modes =
 536                 BIT(NL80211_IFTYPE_STATION) | BIT(NL80211_IFTYPE_AP);
 537
 538         if (ucode_flags & IWL_UCODE_TLV_FLAGS_P2P)
 539                 priv->contexts[IWL_RXON_CTX_PAN].interface_modes |=
 540                         BIT(NL80211_IFTYPE_P2P_CLIENT) |
 541                         BIT(NL80211_IFTYPE_P2P_GO);
 542
 543         priv->contexts[IWL_RXON_CTX_PAN].ap_devtype = RXON_DEV_TYPE_CP;
 544         priv->contexts[IWL_RXON_CTX_PAN].station_devtype = RXON_DEV_TYPE_2STA;
 545         priv->contexts[IWL_RXON_CTX_PAN].unused_devtype = RXON_DEV_TYPE_P2P;
 546
 547         BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
 548 }
 549
 550 static void iwl_rf_kill_ct_config(struct iwl_priv *priv)
 551 {
 552         struct iwl_ct_kill_config cmd;
 553         struct iwl_ct_kill_throttling_config adv_cmd;
 554         int ret = 0;
 555
 556         iwl_write32(trans(priv), CSR_UCODE_DRV_GP1_CLR,
 557                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
 558
 559         priv->thermal_throttle.ct_kill_toggle = false;
 560
 561         if (cfg(priv)->base_params->support_ct_kill_exit) {
 562                 adv_cmd.critical_temperature_enter =
 563                         cpu_to_le32(hw_params(priv).ct_kill_threshold);
 564                 adv_cmd.critical_temperature_exit =
 565                         cpu_to_le32(hw_params(priv).ct_kill_exit_threshold);
 566
 567                 ret = iwl_dvm_send_cmd_pdu(priv,
 568                                        REPLY_CT_KILL_CONFIG_CMD,
 569                                        CMD_SYNC, sizeof(adv_cmd), &adv_cmd);
 570                 if (ret)
 571                         IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
 572                 else
 573                         IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
 574                                 "succeeded, critical temperature enter is %d,"
 575                                 "exit is %d\n",
 576                                 hw_params(priv).ct_kill_threshold,
 577                                 hw_params(priv).ct_kill_exit_threshold);
 578         } else {
 579                 cmd.critical_temperature_R =
 580                         cpu_to_le32(hw_params(priv).ct_kill_threshold);
 581
 582                 ret = iwl_dvm_send_cmd_pdu(priv,
 583                                        REPLY_CT_KILL_CONFIG_CMD,
 584                                        CMD_SYNC, sizeof(cmd), &cmd);
 585                 if (ret)
 586                         IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
 587                 else
 588                         IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
 589                                 "succeeded, "
 590                                 "critical temperature is %d\n",
 591                                 hw_params(priv).ct_kill_threshold);
 592         }
 593 }
 594
 595 static int iwlagn_send_calib_cfg_rt(struct iwl_priv *priv, u32 cfg)
 596 {
 597         struct iwl_calib_cfg_cmd calib_cfg_cmd;
 598         struct iwl_host_cmd cmd = {
 599                 .id = CALIBRATION_CFG_CMD,
 600                 .len = { sizeof(struct iwl_calib_cfg_cmd), },
 601                 .data = { &calib_cfg_cmd, },
 602         };
 603
 604         memset(&calib_cfg_cmd, 0, sizeof(calib_cfg_cmd));
 605         calib_cfg_cmd.ucd_calib_cfg.once.is_enable = IWL_CALIB_RT_CFG_ALL;
 606         calib_cfg_cmd.ucd_calib_cfg.once.start = cpu_to_le32(cfg);
 607
 608         return iwl_dvm_send_cmd(priv, &cmd);
 609 }
 610
 611
 612 static int iwlagn_send_tx_ant_config(struct iwl_priv *priv, u8 valid_tx_ant)
 613 {
 614         struct iwl_tx_ant_config_cmd tx_ant_cmd = {
 615           .valid = cpu_to_le32(valid_tx_ant),
 616         };
 617
 618         if (IWL_UCODE_API(priv->fw->ucode_ver) > 1) {
 619                 IWL_DEBUG_HC(priv, "select valid tx ant: %u\n", valid_tx_ant);
 620                 return iwl_dvm_send_cmd_pdu(priv,
 621                                         TX_ANT_CONFIGURATION_CMD,
 622                                         CMD_SYNC,
 623                                         sizeof(struct iwl_tx_ant_config_cmd),
 624                                         &tx_ant_cmd);
 625         } else {
 626                 IWL_DEBUG_HC(priv, "TX_ANT_CONFIGURATION_CMD not supported\n");
 627                 return -EOPNOTSUPP;
 628         }
 629 }
 630
 631 /**
 632  * iwl_alive_start - called after REPLY_ALIVE notification received
 633  *                   from protocol/runtime uCode (initialization uCode's
 634  *                   Alive gets handled by iwl_init_alive_start()).
 635  */
 636 int iwl_alive_start(struct iwl_priv *priv)
 637 {
 638         int ret = 0;
 639         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 640
 641         IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
 642
 643         /* After the ALIVE response, we can send host commands to the uCode */
 644         set_bit(STATUS_ALIVE, &priv->shrd->status);
 645
 646         /* Enable watchdog to monitor the driver tx queues */
 647         iwl_setup_watchdog(priv);
 648
 649         if (iwl_is_rfkill(priv->shrd))
 650                 return -ERFKILL;
 651
 652         if (priv->event_log.ucode_trace) {
 653                 /* start collecting data now */
 654                 mod_timer(&priv->ucode_trace, jiffies);
 655         }
 656
 657         /* download priority table before any calibration request */
 658         if (cfg(priv)->bt_params &&
 659             cfg(priv)->bt_params->advanced_bt_coexist) {
 660                 /* Configure Bluetooth device coexistence support */
 661                 if (cfg(priv)->bt_params->bt_sco_disable)
 662                         priv->bt_enable_pspoll = false;
 663                 else
 664                         priv->bt_enable_pspoll = true;
 665
 666                 priv->bt_valid = IWLAGN_BT_ALL_VALID_MSK;
 667                 priv->kill_ack_mask = IWLAGN_BT_KILL_ACK_MASK_DEFAULT;
 668                 priv->kill_cts_mask = IWLAGN_BT_KILL_CTS_MASK_DEFAULT;
 669                 iwlagn_send_advance_bt_config(priv);
 670                 priv->bt_valid = IWLAGN_BT_VALID_ENABLE_FLAGS;
 671                 priv->cur_rssi_ctx = NULL;
 672
 673                 iwl_send_prio_tbl(priv);
 674
 675                 /* FIXME: w/a to force change uCode BT state machine */
 676                 ret = iwl_send_bt_env(priv, IWL_BT_COEX_ENV_OPEN,
 677                                          BT_COEX_PRIO_TBL_EVT_INIT_CALIB2);
 678                 if (ret)
 679                         return ret;
 680                 ret = iwl_send_bt_env(priv, IWL_BT_COEX_ENV_CLOSE,
 681                                          BT_COEX_PRIO_TBL_EVT_INIT_CALIB2);
 682                 if (ret)
 683                         return ret;
 684         } else {
 685                 /*
 686                  * default is 2-wire BT coexexistence support
 687                  */
 688                 iwl_send_bt_config(priv);
 689         }
 690
 691         /*
 692          * Perform runtime calibrations, including DC calibration.
 693          */
 694         iwlagn_send_calib_cfg_rt(priv, IWL_CALIB_CFG_DC_IDX);
 695
 696         ieee80211_wake_queues(priv->hw);
 697
 698         priv->active_rate = IWL_RATES_MASK;
 699
 700         /* Configure Tx antenna selection based on H/W config */
 701         iwlagn_send_tx_ant_config(priv, hw_params(priv).valid_tx_ant);
 702
 703         if (iwl_is_associated_ctx(ctx) && !priv->wowlan) {
 704                 struct iwl_rxon_cmd *active_rxon =
 705                                 (struct iwl_rxon_cmd *)&ctx->active;
 706                 /* apply any changes in staging */
 707                 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
 708                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
 709         } else {
 710                 struct iwl_rxon_context *tmp;
 711                 /* Initialize our rx_config data */
 712                 for_each_context(priv, tmp)
 713                         iwl_connection_init_rx_config(priv, tmp);
 714
 715                 iwlagn_set_rxon_chain(priv, ctx);
 716         }
 717
 718         if (!priv->wowlan) {
 719                 /* WoWLAN ucode will not reply in the same way, skip it */
 720                 iwl_reset_run_time_calib(priv);
 721         }
 722
 723         set_bit(STATUS_READY, &priv->shrd->status);
 724
 725         /* Configure the adapter for unassociated operation */
 726         ret = iwlagn_commit_rxon(priv, ctx);
 727         if (ret)
 728                 return ret;
 729
 730         /* At this point, the NIC is initialized and operational */
 731         iwl_rf_kill_ct_config(priv);
 732
 733         IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
 734
 735         return iwl_power_update_mode(priv, true);
 736 }
 737
 738 /**
 739  * iwl_clear_driver_stations - clear knowledge of all stations from driver
 740  * @priv: iwl priv struct
 741  *
 742  * This is called during iwl_down() to make sure that in the case
 743  * we're coming there from a hardware restart mac80211 will be
 744  * able to reconfigure stations -- if we're getting there in the
 745  * normal down flow then the stations will already be cleared.
 746  */
 747 static void iwl_clear_driver_stations(struct iwl_priv *priv)
 748 {
 749         struct iwl_rxon_context *ctx;
 750
 751         spin_lock_bh(&priv->sta_lock);
 752         memset(priv->stations, 0, sizeof(priv->stations));
 753         priv->num_stations = 0;
 754
 755         priv->ucode_key_table = 0;
 756
 757         for_each_context(priv, ctx) {
 758                 /*
 759                  * Remove all key information that is not stored as part
 760                  * of station information since mac80211 may not have had
 761                  * a chance to remove all the keys. When device is
 762                  * reconfigured by mac80211 after an error all keys will
 763                  * be reconfigured.
 764                  */
 765                 memset(ctx->wep_keys, 0, sizeof(ctx->wep_keys));
 766                 ctx->key_mapping_keys = 0;
 767         }
 768
 769         spin_unlock_bh(&priv->sta_lock);
 770 }
 771
 772 void iwl_down(struct iwl_priv *priv)
 773 {
 774         int exit_pending;
 775
 776         IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
 777
 778         lockdep_assert_held(&priv->mutex);
 779
 780         iwl_scan_cancel_timeout(priv, 200);
 781
 782         /*
 783          * If active, scanning won't cancel it, so say it expired.
 784          * No race since we hold the mutex here and a new one
 785          * can't come in at this time.
 786          */
 787         ieee80211_remain_on_channel_expired(priv->hw);
 788
 789         exit_pending =
 790                 test_and_set_bit(STATUS_EXIT_PENDING, &priv->shrd->status);
 791
 792         /* Stop TX queues watchdog. We need to have STATUS_EXIT_PENDING bit set
 793          * to prevent rearm timer */
 794         del_timer_sync(&priv->watchdog);
 795
 796         iwl_clear_ucode_stations(priv, NULL);
 797         iwl_dealloc_bcast_stations(priv);
 798         iwl_clear_driver_stations(priv);
 799
 800         /* reset BT coex data */
 801         priv->bt_status = 0;
 802         priv->cur_rssi_ctx = NULL;
 803         priv->bt_is_sco = 0;
 804         if (cfg(priv)->bt_params)
 805                 priv->bt_traffic_load =
 806                          cfg(priv)->bt_params->bt_init_traffic_load;
 807         else
 808                 priv->bt_traffic_load = 0;
 809         priv->bt_full_concurrent = false;
 810         priv->bt_ci_compliance = 0;
 811
 812         /* Wipe out the EXIT_PENDING status bit if we are not actually
 813          * exiting the module */
 814         if (!exit_pending)
 815                 clear_bit(STATUS_EXIT_PENDING, &priv->shrd->status);
 816
 817         if (priv->mac80211_registered)
 818                 ieee80211_stop_queues(priv->hw);
 819
 820         iwl_trans_stop_device(trans(priv));
 821
 822         /* Clear out all status bits but a few that are stable across reset */
 823         priv->shrd->status &=
 824                         test_bit(STATUS_RF_KILL_HW, &priv->shrd->status) <<
 825                                 STATUS_RF_KILL_HW |
 826                         test_bit(STATUS_GEO_CONFIGURED, &priv->shrd->status) <<
 827                                 STATUS_GEO_CONFIGURED |
 828                         test_bit(STATUS_FW_ERROR, &priv->shrd->status) <<
 829                                 STATUS_FW_ERROR |
 830                         test_bit(STATUS_EXIT_PENDING, &priv->shrd->status) <<
 831                                 STATUS_EXIT_PENDING;
 832
 833         dev_kfree_skb(priv->beacon_skb);
 834         priv->beacon_skb = NULL;
 835 }
 836
 837 /*****************************************************************************
 838  *
 839  * Workqueue callbacks
 840  *
 841  *****************************************************************************/
 842
 843 static void iwl_bg_run_time_calib_work(struct work_struct *work)
 844 {
 845         struct iwl_priv *priv = container_of(work, struct iwl_priv,
 846                         run_time_calib_work);
 847
 848         mutex_lock(&priv->mutex);
 849
 850         if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status) ||
 851             test_bit(STATUS_SCANNING, &priv->shrd->status)) {
 852                 mutex_unlock(&priv->mutex);
 853                 return;
 854         }
 855
 856         if (priv->start_calib) {
 857                 iwl_chain_noise_calibration(priv);
 858                 iwl_sensitivity_calibration(priv);
 859         }
 860
 861         mutex_unlock(&priv->mutex);
 862 }
 863
 864 void iwlagn_prepare_restart(struct iwl_priv *priv)
 865 {
 866         struct iwl_rxon_context *ctx;
 867         bool bt_full_concurrent;
 868         u8 bt_ci_compliance;
 869         u8 bt_load;
 870         u8 bt_status;
 871         bool bt_is_sco;
 872
 873         lockdep_assert_held(&priv->mutex);
 874
 875         for_each_context(priv, ctx)
 876                 ctx->vif = NULL;
 877         priv->is_open = 0;
 878
 879         /*
 880          * __iwl_down() will clear the BT status variables,
 881          * which is correct, but when we restart we really
 882          * want to keep them so restore them afterwards.
 883          *
 884          * The restart process will later pick them up and
 885          * re-configure the hw when we reconfigure the BT
 886          * command.
 887          */
 888         bt_full_concurrent = priv->bt_full_concurrent;
 889         bt_ci_compliance = priv->bt_ci_compliance;
 890         bt_load = priv->bt_traffic_load;
 891         bt_status = priv->bt_status;
 892         bt_is_sco = priv->bt_is_sco;
 893
 894         iwl_down(priv);
 895
 896         priv->bt_full_concurrent = bt_full_concurrent;
 897         priv->bt_ci_compliance = bt_ci_compliance;
 898         priv->bt_traffic_load = bt_load;
 899         priv->bt_status = bt_status;
 900         priv->bt_is_sco = bt_is_sco;
 901 }
 902
 903 static void iwl_bg_restart(struct work_struct *data)
 904 {
 905         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
 906
 907         if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
 908                 return;
 909
 910         if (test_and_clear_bit(STATUS_FW_ERROR, &priv->shrd->status)) {
 911                 mutex_lock(&priv->mutex);
 912                 iwlagn_prepare_restart(priv);
 913                 mutex_unlock(&priv->mutex);
 914                 iwl_cancel_deferred_work(priv);
 915                 ieee80211_restart_hw(priv->hw);
 916         } else {
 917                 WARN_ON(1);
 918         }
 919 }
 920
 921
 922
 923
 924 void iwlagn_disable_roc(struct iwl_priv *priv)
 925 {
 926         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_PAN];
 927
 928         lockdep_assert_held(&priv->mutex);
 929
 930         if (!priv->hw_roc_setup)
 931                 return;
 932
 933         ctx->staging.dev_type = RXON_DEV_TYPE_P2P;
 934         ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
 935
 936         priv->hw_roc_channel = NULL;
 937
 938         memset(ctx->staging.node_addr, 0, ETH_ALEN);
 939
 940         iwlagn_commit_rxon(priv, ctx);
 941
 942         ctx->is_active = false;
 943         priv->hw_roc_setup = false;
 944 }
 945
 946 static void iwlagn_disable_roc_work(struct work_struct *work)
 947 {
 948         struct iwl_priv *priv = container_of(work, struct iwl_priv,
 949                                              hw_roc_disable_work.work);
 950
 951         mutex_lock(&priv->mutex);
 952         iwlagn_disable_roc(priv);
 953         mutex_unlock(&priv->mutex);
 954 }
 955
 956 /*****************************************************************************
 957  *
 958  * driver setup and teardown
 959  *
 960  *****************************************************************************/
 961
 962 static void iwl_setup_deferred_work(struct iwl_priv *priv)
 963 {
 964         priv->workqueue = create_singlethread_workqueue(DRV_NAME);
 965
 966         init_waitqueue_head(&priv->shrd->wait_command_queue);
 967
 968         INIT_WORK(&priv->restart, iwl_bg_restart);
 969         INIT_WORK(&priv->beacon_update, iwl_bg_beacon_update);
 970         INIT_WORK(&priv->run_time_calib_work, iwl_bg_run_time_calib_work);
 971         INIT_WORK(&priv->tx_flush, iwl_bg_tx_flush);
 972         INIT_WORK(&priv->bt_full_concurrency, iwl_bg_bt_full_concurrency);
 973         INIT_WORK(&priv->bt_runtime_config, iwl_bg_bt_runtime_config);
 974         INIT_DELAYED_WORK(&priv->hw_roc_disable_work,
 975                           iwlagn_disable_roc_work);
 976
 977         iwl_setup_scan_deferred_work(priv);
 978
 979         if (cfg(priv)->bt_params)
 980                 iwlagn_bt_setup_deferred_work(priv);
 981
 982         init_timer(&priv->statistics_periodic);
 983         priv->statistics_periodic.data = (unsigned long)priv;
 984         priv->statistics_periodic.function = iwl_bg_statistics_periodic;
 985
 986         init_timer(&priv->ucode_trace);
 987         priv->ucode_trace.data = (unsigned long)priv;
 988         priv->ucode_trace.function = iwl_bg_ucode_trace;
 989
 990         init_timer(&priv->watchdog);
 991         priv->watchdog.data = (unsigned long)priv;
 992         priv->watchdog.function = iwl_bg_watchdog;
 993 }
 994
 995 void iwl_cancel_deferred_work(struct iwl_priv *priv)
 996 {
 997         if (cfg(priv)->bt_params)
 998                 iwlagn_bt_cancel_deferred_work(priv);
 999
1000         cancel_work_sync(&priv->run_time_calib_work);
1001         cancel_work_sync(&priv->beacon_update);
1002
1003         iwl_cancel_scan_deferred_work(priv);
1004
1005         cancel_work_sync(&priv->bt_full_concurrency);
1006         cancel_work_sync(&priv->bt_runtime_config);
1007         cancel_delayed_work_sync(&priv->hw_roc_disable_work);
1008
1009         del_timer_sync(&priv->statistics_periodic);
1010         del_timer_sync(&priv->ucode_trace);
1011 }
1012
1013 static void iwl_init_hw_rates(struct ieee80211_rate *rates)
1014 {
1015         int i;
1016
1017         for (i = 0; i < IWL_RATE_COUNT_LEGACY; i++) {
1018                 rates[i].bitrate = iwl_rates[i].ieee * 5;
1019                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
1020                 rates[i].hw_value_short = i;
1021                 rates[i].flags = 0;
1022                 if ((i >= IWL_FIRST_CCK_RATE) && (i <= IWL_LAST_CCK_RATE)) {
1023                         /*
1024                          * If CCK != 1M then set short preamble rate flag.
1025                          */
1026                         rates[i].flags |=
1027                                 (iwl_rates[i].plcp == IWL_RATE_1M_PLCP) ?
1028                                         0 : IEEE80211_RATE_SHORT_PREAMBLE;
1029                 }
1030         }
1031 }
1032
1033 static int iwl_init_drv(struct iwl_priv *priv)
1034 {
1035         int ret;
1036
1037         spin_lock_init(&priv->sta_lock);
1038
1039         mutex_init(&priv->mutex);
1040
1041         INIT_LIST_HEAD(&priv->calib_results);
1042
1043         priv->ieee_channels = NULL;
1044         priv->ieee_rates = NULL;
1045         priv->band = IEEE80211_BAND_2GHZ;
1046
1047         priv->plcp_delta_threshold =
1048                 cfg(priv)->base_params->plcp_delta_threshold;
1049
1050         priv->iw_mode = NL80211_IFTYPE_STATION;
1051         priv->current_ht_config.smps = IEEE80211_SMPS_STATIC;
1052         priv->missed_beacon_threshold = IWL_MISSED_BEACON_THRESHOLD_DEF;
1053         priv->agg_tids_count = 0;
1054
1055         priv->ucode_owner = IWL_OWNERSHIP_DRIVER;
1056
1057         /* initialize force reset */
1058         priv->force_reset[IWL_RF_RESET].reset_duration =
1059                 IWL_DELAY_NEXT_FORCE_RF_RESET;
1060         priv->force_reset[IWL_FW_RESET].reset_duration =
1061                 IWL_DELAY_NEXT_FORCE_FW_RELOAD;
1062
1063         priv->rx_statistics_jiffies = jiffies;
1064
1065         /* Choose which receivers/antennas to use */
1066         iwlagn_set_rxon_chain(priv, &priv->contexts[IWL_RXON_CTX_BSS]);
1067
1068         iwl_init_scan_params(priv);
1069
1070         /* init bt coex */
1071         if (cfg(priv)->bt_params &&
1072             cfg(priv)->bt_params->advanced_bt_coexist) {
1073                 priv->kill_ack_mask = IWLAGN_BT_KILL_ACK_MASK_DEFAULT;
1074                 priv->kill_cts_mask = IWLAGN_BT_KILL_CTS_MASK_DEFAULT;
1075                 priv->bt_valid = IWLAGN_BT_ALL_VALID_MSK;
1076                 priv->bt_on_thresh = BT_ON_THRESHOLD_DEF;
1077                 priv->bt_duration = BT_DURATION_LIMIT_DEF;
1078                 priv->dynamic_frag_thresh = BT_FRAG_THRESHOLD_DEF;
1079         }
1080
1081         ret = iwl_init_channel_map(priv);
1082         if (ret) {
1083                 IWL_ERR(priv, "initializing regulatory failed: %d\n", ret);
1084                 goto err;
1085         }
1086
1087         ret = iwl_init_geos(priv);
1088         if (ret) {
1089                 IWL_ERR(priv, "initializing geos failed: %d\n", ret);
1090                 goto err_free_channel_map;
1091         }
1092         iwl_init_hw_rates(priv->ieee_rates);
1093
1094         return 0;
1095
1096 err_free_channel_map:
1097         iwl_free_channel_map(priv);
1098 err:
1099         return ret;
1100 }
1101
1102 static void iwl_uninit_drv(struct iwl_priv *priv)
1103 {
1104         iwl_free_geos(priv);
1105         iwl_free_channel_map(priv);
1106         if (priv->tx_cmd_pool)
1107                 kmem_cache_destroy(priv->tx_cmd_pool);
1108         kfree(priv->scan_cmd);
1109         kfree(priv->beacon_cmd);
1110         kfree(rcu_dereference_raw(priv->noa_data));
1111         iwl_calib_free_results(priv);
1112 #ifdef CONFIG_IWLWIFI_DEBUGFS
1113         kfree(priv->wowlan_sram);
1114 #endif
1115 }
1116
1117 /* Size of one Rx buffer in host DRAM */
1118 #define IWL_RX_BUF_SIZE_4K (4 * 1024)
1119 #define IWL_RX_BUF_SIZE_8K (8 * 1024)
1120
1121 static void iwl_set_hw_params(struct iwl_priv *priv)
1122 {
1123         if (cfg(priv)->ht_params)
1124                 hw_params(priv).use_rts_for_aggregation =
1125                         cfg(priv)->ht_params->use_rts_for_aggregation;
1126
1127         if (iwlagn_mod_params.amsdu_size_8K)
1128                 hw_params(priv).rx_page_order =
1129                         get_order(IWL_RX_BUF_SIZE_8K);
1130         else
1131                 hw_params(priv).rx_page_order =
1132                         get_order(IWL_RX_BUF_SIZE_4K);
1133
1134         if (iwlagn_mod_params.disable_11n & IWL_DISABLE_HT_ALL)
1135                 hw_params(priv).sku &= ~EEPROM_SKU_CAP_11N_ENABLE;
1136
1137         hw_params(priv).num_ampdu_queues =
1138                 cfg(priv)->base_params->num_of_ampdu_queues;
1139         hw_params(priv).wd_timeout = cfg(priv)->base_params->wd_timeout;
1140
1141         /* Device-specific setup */
1142         cfg(priv)->lib->set_hw_params(priv);
1143 }
1144
1145
1146
1147 static void iwl_debug_config(struct iwl_priv *priv)
1148 {
1149         dev_printk(KERN_INFO, trans(priv)->dev, "CONFIG_IWLWIFI_DEBUG "
1150 #ifdef CONFIG_IWLWIFI_DEBUG
1151                 "enabled\n");
1152 #else
1153                 "disabled\n");
1154 #endif
1155         dev_printk(KERN_INFO, trans(priv)->dev, "CONFIG_IWLWIFI_DEBUGFS "
1156 #ifdef CONFIG_IWLWIFI_DEBUGFS
1157                 "enabled\n");
1158 #else
1159                 "disabled\n");
1160 #endif
1161         dev_printk(KERN_INFO, trans(priv)->dev, "CONFIG_IWLWIFI_DEVICE_TRACING "
1162 #ifdef CONFIG_IWLWIFI_DEVICE_TRACING
1163                 "enabled\n");
1164 #else
1165                 "disabled\n");
1166 #endif
1167
1168         dev_printk(KERN_INFO, trans(priv)->dev, "CONFIG_IWLWIFI_DEVICE_TESTMODE "
1169 #ifdef CONFIG_IWLWIFI_DEVICE_TESTMODE
1170                 "enabled\n");
1171 #else
1172                 "disabled\n");
1173 #endif
1174         dev_printk(KERN_INFO, trans(priv)->dev, "CONFIG_IWLWIFI_P2P "
1175 #ifdef CONFIG_IWLWIFI_P2P
1176                 "enabled\n");
1177 #else
1178                 "disabled\n");
1179 #endif
1180 }
1181
1182 static struct iwl_op_mode *iwl_op_mode_dvm_start(struct iwl_trans *trans,
1183                                                  const struct iwl_fw *fw)
1184 {
1185         int err = 0;
1186         struct iwl_priv *priv;
1187         struct ieee80211_hw *hw;
1188         struct iwl_op_mode *op_mode;
1189         u16 num_mac;
1190         u32 ucode_flags;
1191
1192         /************************
1193          * 1. Allocating HW data
1194          ************************/
1195         hw = iwl_alloc_all();
1196         if (!hw) {
1197                 pr_err("%s: Cannot allocate network device\n",
1198                                 cfg(trans)->name);
1199                 err = -ENOMEM;
1200                 goto out;
1201         }
1202
1203         op_mode = hw->priv;
1204         op_mode->ops = &iwl_dvm_ops;
1205         priv = IWL_OP_MODE_GET_DVM(op_mode);
1206         priv->shrd = trans->shrd;
1207         priv->fw = fw;
1208         /* TODO: remove fw from shared data later */
1209         priv->shrd->fw = fw;
1210
1211         iwl_trans_configure(trans(priv), op_mode);
1212
1213         /* At this point both hw and priv are allocated. */
1214
1215         SET_IEEE80211_DEV(priv->hw, trans(priv)->dev);
1216
1217         /* show what debugging capabilities we have */
1218         iwl_debug_config(priv);
1219
1220         IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
1221
1222         /* is antenna coupling more than 35dB ? */
1223         priv->bt_ant_couple_ok =
1224                 (iwlagn_mod_params.ant_coupling >
1225                         IWL_BT_ANTENNA_COUPLING_THRESHOLD) ?
1226                         true : false;
1227
1228         /* enable/disable bt channel inhibition */
1229         priv->bt_ch_announce = iwlagn_mod_params.bt_ch_announce;
1230         IWL_DEBUG_INFO(priv, "BT channel inhibition is %s\n",
1231                        (priv->bt_ch_announce) ? "On" : "Off");
1232
1233         if (iwl_alloc_traffic_mem(priv))
1234                 IWL_ERR(priv, "Not enough memory to generate traffic log\n");
1235
1236         /* these spin locks will be used in apm_ops.init and EEPROM access
1237          * we should init now
1238          */
1239         spin_lock_init(&trans(priv)->reg_lock);
1240         spin_lock_init(&priv->statistics.lock);
1241
1242         /***********************
1243          * 3. Read REV register
1244          ***********************/
1245         IWL_INFO(priv, "Detected %s, REV=0x%X\n",
1246                 cfg(priv)->name, trans(priv)->hw_rev);
1247
1248         err = iwl_trans_start_hw(trans(priv));
1249         if (err)
1250                 goto out_free_traffic_mem;
1251
1252         /*****************
1253          * 4. Read EEPROM
1254          *****************/
1255         /* Read the EEPROM */
1256         err = iwl_eeprom_init(trans(priv), trans(priv)->hw_rev);
1257         /* Reset chip to save power until we load uCode during "up". */
1258         iwl_trans_stop_hw(trans(priv));
1259         if (err) {
1260                 IWL_ERR(priv, "Unable to init EEPROM\n");
1261                 goto out_free_traffic_mem;
1262         }
1263         err = iwl_eeprom_check_version(priv);
1264         if (err)
1265                 goto out_free_eeprom;
1266
1267         err = iwl_eeprom_init_hw_params(priv);
1268         if (err)
1269                 goto out_free_eeprom;
1270
1271         /* extract MAC Address */
1272         iwl_eeprom_get_mac(priv->shrd, priv->addresses[0].addr);
1273         IWL_DEBUG_INFO(priv, "MAC address: %pM\n", priv->addresses[0].addr);
1274         priv->hw->wiphy->addresses = priv->addresses;
1275         priv->hw->wiphy->n_addresses = 1;
1276         num_mac = iwl_eeprom_query16(priv->shrd, EEPROM_NUM_MAC_ADDRESS);
1277         if (num_mac > 1) {
1278                 memcpy(priv->addresses[1].addr, priv->addresses[0].addr,
1279                        ETH_ALEN);
1280                 priv->addresses[1].addr[5]++;
1281                 priv->hw->wiphy->n_addresses++;
1282         }
1283
1284         /************************
1285          * 5. Setup HW constants
1286          ************************/
1287         iwl_set_hw_params(priv);
1288
1289         ucode_flags = fw->ucode_capa.flags;
1290
1291 #ifndef CONFIG_IWLWIFI_P2P
1292         ucode_flags &= ~IWL_UCODE_TLV_FLAGS_PAN;
1293 #endif
1294         if (!(hw_params(priv).sku & EEPROM_SKU_CAP_IPAN_ENABLE))
1295                 ucode_flags &= ~IWL_UCODE_TLV_FLAGS_PAN;
1296
1297         /*
1298          * if not PAN, then don't support P2P -- might be a uCode
1299          * packaging bug or due to the eeprom check above
1300          */
1301         if (!(ucode_flags & IWL_UCODE_TLV_FLAGS_PAN))
1302                 ucode_flags &= ~IWL_UCODE_TLV_FLAGS_P2P;
1303
1304
1305         /*******************
1306          * 6. Setup priv
1307          *******************/
1308
1309         err = iwl_init_drv(priv);
1310         if (err)
1311                 goto out_free_eeprom;
1312         /* At this point both hw and priv are initialized. */
1313
1314         /********************
1315          * 7. Setup services
1316          ********************/
1317         iwl_setup_deferred_work(priv);
1318         iwl_setup_rx_handlers(priv);
1319         iwl_testmode_init(priv);
1320
1321         iwl_power_initialize(priv);
1322         iwl_tt_initialize(priv);
1323
1324         snprintf(priv->hw->wiphy->fw_version,
1325                  sizeof(priv->hw->wiphy->fw_version),
1326                  "%s", fw->fw_version);
1327
1328         priv->new_scan_threshold_behaviour =
1329                 !!(ucode_flags & IWL_UCODE_TLV_FLAGS_NEWSCAN);
1330
1331         if (ucode_flags & IWL_UCODE_TLV_FLAGS_PAN) {
1332                 priv->sta_key_max_num = STA_KEY_MAX_NUM_PAN;
1333                 priv->shrd->cmd_queue = IWL_IPAN_CMD_QUEUE_NUM;
1334         } else {
1335                 priv->sta_key_max_num = STA_KEY_MAX_NUM;
1336                 priv->shrd->cmd_queue = IWL_DEFAULT_CMD_QUEUE_NUM;
1337         }
1338
1339         priv->phy_calib_chain_noise_reset_cmd =
1340                 fw->ucode_capa.standard_phy_calibration_size;
1341         priv->phy_calib_chain_noise_gain_cmd =
1342                 fw->ucode_capa.standard_phy_calibration_size + 1;
1343
1344         /* initialize all valid contexts */
1345         iwl_init_context(priv, ucode_flags);
1346
1347         /**************************************************
1348          * This is still part of probe() in a sense...
1349          *
1350          * 9. Setup and register with mac80211 and debugfs
1351          **************************************************/
1352         err = iwlagn_mac_setup_register(priv, &fw->ucode_capa);
1353         if (err)
1354                 goto out_destroy_workqueue;
1355
1356         err = iwl_dbgfs_register(priv, DRV_NAME);
1357         if (err)
1358                 IWL_ERR(priv,
1359                         "failed to create debugfs files. Ignoring error: %d\n",
1360                         err);
1361
1362         return op_mode;
1363
1364 out_destroy_workqueue:
1365         destroy_workqueue(priv->workqueue);
1366         priv->workqueue = NULL;
1367         iwl_uninit_drv(priv);
1368 out_free_eeprom:
1369         iwl_eeprom_free(priv->shrd);
1370 out_free_traffic_mem:
1371         iwl_free_traffic_mem(priv);
1372         ieee80211_free_hw(priv->hw);
1373 out:
1374         op_mode = NULL;
1375         return op_mode;
1376 }
1377
1378 static void iwl_op_mode_dvm_stop(struct iwl_op_mode *op_mode)
1379 {
1380         struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
1381
1382         IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
1383
1384         iwl_dbgfs_unregister(priv);
1385
1386         iwl_testmode_cleanup(priv);
1387         iwlagn_mac_unregister(priv);
1388
1389         iwl_tt_exit(priv);
1390
1391         /*This will stop the queues, move the device to low power state */
1392         iwl_trans_stop_device(trans(priv));
1393
1394         iwl_eeprom_free(priv->shrd);
1395
1396         /*netif_stop_queue(dev); */
1397         flush_workqueue(priv->workqueue);
1398
1399         /* ieee80211_unregister_hw calls iwlagn_mac_stop, which flushes
1400          * priv->workqueue... so we can't take down the workqueue
1401          * until now... */
1402         destroy_workqueue(priv->workqueue);
1403         priv->workqueue = NULL;
1404         iwl_free_traffic_mem(priv);
1405
1406         iwl_uninit_drv(priv);
1407
1408         dev_kfree_skb(priv->beacon_skb);
1409
1410         ieee80211_free_hw(priv->hw);
1411 }
1412
1413 static void iwl_cmd_queue_full(struct iwl_op_mode *op_mode)
1414 {
1415         struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
1416
1417         if (!iwl_check_for_ct_kill(priv)) {
1418                 IWL_ERR(priv, "Restarting adapter queue is full\n");
1419                 iwl_nic_error(op_mode);
1420         }
1421 }
1422
1423 static void iwl_nic_config(struct iwl_op_mode *op_mode)
1424 {
1425         struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
1426
1427         cfg(priv)->lib->nic_config(priv);
1428 }
1429
1430 static void iwl_stop_sw_queue(struct iwl_op_mode *op_mode, u8 ac)
1431 {
1432         struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
1433
1434         set_bit(ac, &priv->transport_queue_stop);
1435         ieee80211_stop_queue(priv->hw, ac);
1436 }
1437
1438 static void iwl_wake_sw_queue(struct iwl_op_mode *op_mode, u8 ac)
1439 {
1440         struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
1441
1442         clear_bit(ac, &priv->transport_queue_stop);
1443
1444         if (!priv->passive_no_rx)
1445                 ieee80211_wake_queue(priv->hw, ac);
1446 }
1447
1448 void iwlagn_lift_passive_no_rx(struct iwl_priv *priv)
1449 {
1450         int ac;
1451
1452         if (!priv->passive_no_rx)
1453                 return;
1454
1455         for (ac = IEEE80211_AC_VO; ac < IEEE80211_NUM_ACS; ac++) {
1456                 if (!test_bit(ac, &priv->transport_queue_stop))
1457                         ieee80211_wake_queue(priv->hw, ac);
1458         }
1459
1460         priv->passive_no_rx = false;
1461 }
1462
1463 const struct iwl_op_mode_ops iwl_dvm_ops = {
1464         .start = iwl_op_mode_dvm_start,
1465         .stop = iwl_op_mode_dvm_stop,
1466         .rx = iwl_rx_dispatch,
1467         .queue_full = iwl_stop_sw_queue,
1468         .queue_not_full = iwl_wake_sw_queue,
1469         .hw_rf_kill = iwl_set_hw_rfkill_state,
1470         .free_skb = iwl_free_skb,
1471         .nic_error = iwl_nic_error,
1472         .cmd_queue_full = iwl_cmd_queue_full,
1473         .nic_config = iwl_nic_config,
1474 };
1475
1476 /*****************************************************************************
1477  *
1478  * driver and module entry point
1479  *
1480  *****************************************************************************/
1481 static int __init iwl_init(void)
1482 {
1483
1484         int ret;
1485         pr_info(DRV_DESCRIPTION ", " DRV_VERSION "\n");
1486         pr_info(DRV_COPYRIGHT "\n");
1487
1488         ret = iwlagn_rate_control_register();
1489         if (ret) {
1490                 pr_err("Unable to register rate control algorithm: %d\n", ret);
1491                 return ret;
1492         }
1493
1494         ret = iwl_pci_register_driver();
1495
1496         if (ret)
1497                 goto error_register;
1498         return ret;
1499
1500 error_register:
1501         iwlagn_rate_control_unregister();
1502         return ret;
1503 }
1504
1505 static void __exit iwl_exit(void)
1506 {
1507         iwl_pci_unregister_driver();
1508         iwlagn_rate_control_unregister();
1509 }
1510
1511 module_exit(iwl_exit);
1512 module_init(iwl_init);
1513
1514 #ifdef CONFIG_IWLWIFI_DEBUG
1515 module_param_named(debug, iwlagn_mod_params.debug_level, uint,
1516                    S_IRUGO | S_IWUSR);
1517 MODULE_PARM_DESC(debug, "debug output mask");
1518 #endif
1519
1520 module_param_named(swcrypto, iwlagn_mod_params.sw_crypto, int, S_IRUGO);
1521 MODULE_PARM_DESC(swcrypto, "using crypto in software (default 0 [hardware])");
1522 module_param_named(11n_disable, iwlagn_mod_params.disable_11n, uint, S_IRUGO);
1523 MODULE_PARM_DESC(11n_disable,
1524         "disable 11n functionality, bitmap: 1: full, 2: agg TX, 4: agg RX");
1525 module_param_named(amsdu_size_8K, iwlagn_mod_params.amsdu_size_8K,
1526                    int, S_IRUGO);
1527 MODULE_PARM_DESC(amsdu_size_8K, "enable 8K amsdu size");
1528 module_param_named(fw_restart, iwlagn_mod_params.restart_fw, int, S_IRUGO);
1529 MODULE_PARM_DESC(fw_restart, "restart firmware in case of error");
1530
1531 module_param_named(ucode_alternative,
1532                    iwlagn_mod_params.wanted_ucode_alternative,
1533                    int, S_IRUGO);
1534 MODULE_PARM_DESC(ucode_alternative,
1535                  "specify ucode alternative to use from ucode file");
1536
1537 module_param_named(antenna_coupling, iwlagn_mod_params.ant_coupling,
1538                    int, S_IRUGO);
1539 MODULE_PARM_DESC(antenna_coupling,
1540                  "specify antenna coupling in dB (defualt: 0 dB)");
1541
1542 module_param_named(bt_ch_inhibition, iwlagn_mod_params.bt_ch_announce,
1543                    bool, S_IRUGO);
1544 MODULE_PARM_DESC(bt_ch_inhibition,
1545                  "Enable BT channel inhibition (default: enable)");
1546
1547 module_param_named(plcp_check, iwlagn_mod_params.plcp_check, bool, S_IRUGO);
1548 MODULE_PARM_DESC(plcp_check, "Check plcp health (default: 1 [enabled])");
1549
1550 module_param_named(ack_check, iwlagn_mod_params.ack_check, bool, S_IRUGO);
1551 MODULE_PARM_DESC(ack_check, "Check ack health (default: 0 [disabled])");
1552
1553 module_param_named(wd_disable, iwlagn_mod_params.wd_disable, int, S_IRUGO);
1554 MODULE_PARM_DESC(wd_disable,
1555                 "Disable stuck queue watchdog timer 0=system default, "
1556                 "1=disable, 2=enable (default: 0)");
1557
1558 /*
1559  * set bt_coex_active to true, uCode will do kill/defer
1560  * every time the priority line is asserted (BT is sending signals on the
1561  * priority line in the PCIx).
1562  * set bt_coex_active to false, uCode will ignore the BT activity and
1563  * perform the normal operation
1564  *
1565  * User might experience transmit issue on some platform due to WiFi/BT
1566  * co-exist problem. The possible behaviors are:
1567  *   Able to scan and finding all the available AP
1568  *   Not able to associate with any AP
1569  * On those platforms, WiFi communication can be restored by set
1570  * "bt_coex_active" module parameter to "false"
1571  *
1572  * default: bt_coex_active = true (BT_COEX_ENABLE)
1573  */
1574 module_param_named(bt_coex_active, iwlagn_mod_params.bt_coex_active,
1575                 bool, S_IRUGO);
1576 MODULE_PARM_DESC(bt_coex_active, "enable wifi/bt co-exist (default: enable)");
1577
1578 module_param_named(led_mode, iwlagn_mod_params.led_mode, int, S_IRUGO);
1579 MODULE_PARM_DESC(led_mode, "0=system default, "
1580                 "1=On(RF On)/Off(RF Off), 2=blinking, 3=Off (default: 0)");
1581
1582 module_param_named(power_save, iwlagn_mod_params.power_save,
1583                 bool, S_IRUGO);
1584 MODULE_PARM_DESC(power_save,
1585                  "enable WiFi power management (default: disable)");
1586
1587 module_param_named(power_level, iwlagn_mod_params.power_level,
1588                 int, S_IRUGO);
1589 MODULE_PARM_DESC(power_level,
1590                  "default power save level (range from 1 - 5, default: 1)");
1591
1592 module_param_named(auto_agg, iwlagn_mod_params.auto_agg,
1593                 bool, S_IRUGO);
1594 MODULE_PARM_DESC(auto_agg,
1595                  "enable agg w/o check traffic load (default: enable)");
1596
1597 /*
1598  * For now, keep using power level 1 instead of automatically
1599  * adjusting ...
1600  */
1601 module_param_named(no_sleep_autoadjust, iwlagn_mod_params.no_sleep_autoadjust,
1602                 bool, S_IRUGO);
1603 MODULE_PARM_DESC(no_sleep_autoadjust,
1604                  "don't automatically adjust sleep level "
1605                  "according to maximum network latency (default: true)");