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->status))
 248                 return;
 249
 250         /* dont send host command if rf-kill is on */
 251         if (!iwl_is_ready_rf(priv))
 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->status))
 265                 goto out;
 266
 267         /* dont send host command if rf-kill is on */
 268         if (!iwl_is_ready_rf(priv))
 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->status))
 304                 return;
 305
 306         /* dont send host command if rf-kill is on */
 307         if (!iwl_is_ready_rf(priv))
 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 (unlikely(!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
 338         /*
 339          * Refuse to read more than would have fit into the log from
 340          * the current start_idx. This used to happen due to the race
 341          * described below, but now WARN because the code below should
 342          * prevent it from happening here.
 343          */
 344         if (WARN_ON(num_events > capacity - start_idx))
 345                 num_events = capacity - start_idx;
 346
 347         /*
 348          * "time" is actually "data" for mode 0 (no timestamp).
 349          * place event id # at far right for easier visual parsing.
 350          */
 351         for (i = 0; i < num_events; i++) {
 352                 ev = iwl_read32(trans(priv), HBUS_TARG_MEM_RDAT);
 353                 time = iwl_read32(trans(priv), HBUS_TARG_MEM_RDAT);
 354                 if (mode == 0) {
 355                         trace_iwlwifi_dev_ucode_cont_event(
 356                                         trans(priv)->dev, 0, time, ev);
 357                 } else {
 358                         data = iwl_read32(trans(priv), HBUS_TARG_MEM_RDAT);
 359                         trace_iwlwifi_dev_ucode_cont_event(
 360                                         trans(priv)->dev, time, data, ev);
 361                 }
 362         }
 363         /* Allow device to power down */
 364         iwl_release_nic_access(trans(priv));
 365         spin_unlock_irqrestore(&trans(priv)->reg_lock, reg_flags);
 366 }
 367
 368 static void iwl_continuous_event_trace(struct iwl_priv *priv)
 369 {
 370         u32 capacity;   /* event log capacity in # entries */
 371         struct {
 372                 u32 capacity;
 373                 u32 mode;
 374                 u32 wrap_counter;
 375                 u32 write_counter;
 376         } __packed read;
 377         u32 base;       /* SRAM byte address of event log header */
 378         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
 379         u32 num_wraps;  /* # times uCode wrapped to top of log */
 380         u32 next_entry; /* index of next entry to be written by uCode */
 381
 382         base = priv->shrd->device_pointers.log_event_table;
 383         if (iwlagn_hw_valid_rtc_data_addr(base)) {
 384                 iwl_read_targ_mem_words(trans(priv), base, &read, sizeof(read));
 385
 386                 capacity = read.capacity;
 387                 mode = read.mode;
 388                 num_wraps = read.wrap_counter;
 389                 next_entry = read.write_counter;
 390         } else
 391                 return;
 392
 393         /*
 394          * Unfortunately, the uCode doesn't use temporary variables.
 395          * Therefore, it can happen that we read next_entry == capacity,
 396          * which really means next_entry == 0.
 397          */
 398         if (unlikely(next_entry == capacity))
 399                 next_entry = 0;
 400         /*
 401          * Additionally, the uCode increases the write pointer before
 402          * the wraps counter, so if the write pointer is smaller than
 403          * the old write pointer (wrap occurred) but we read that no
 404          * wrap occurred, we actually read between the next_entry and
 405          * num_wraps update (this does happen in practice!!) -- take
 406          * that into account by increasing num_wraps.
 407          */
 408         if (unlikely(next_entry < priv->event_log.next_entry &&
 409                      num_wraps == priv->event_log.num_wraps))
 410                 num_wraps++;
 411
 412         if (num_wraps == priv->event_log.num_wraps) {
 413                 iwl_print_cont_event_trace(
 414                         priv, base, priv->event_log.next_entry,
 415                         next_entry - priv->event_log.next_entry,
 416                         capacity, mode);
 417
 418                 priv->event_log.non_wraps_count++;
 419         } else {
 420                 if (num_wraps - priv->event_log.num_wraps > 1)
 421                         priv->event_log.wraps_more_count++;
 422                 else
 423                         priv->event_log.wraps_once_count++;
 424
 425                 trace_iwlwifi_dev_ucode_wrap_event(trans(priv)->dev,
 426                                 num_wraps - priv->event_log.num_wraps,
 427                                 next_entry, priv->event_log.next_entry);
 428
 429                 if (next_entry < priv->event_log.next_entry) {
 430                         iwl_print_cont_event_trace(
 431                                 priv, base, priv->event_log.next_entry,
 432                                 capacity - priv->event_log.next_entry,
 433                                 capacity, mode);
 434
 435                         iwl_print_cont_event_trace(
 436                                 priv, base, 0, next_entry, capacity, mode);
 437                 } else {
 438                         iwl_print_cont_event_trace(
 439                                 priv, base, next_entry,
 440                                 capacity - next_entry,
 441                                 capacity, mode);
 442
 443                         iwl_print_cont_event_trace(
 444                                 priv, base, 0, next_entry, capacity, mode);
 445                 }
 446         }
 447
 448         priv->event_log.num_wraps = num_wraps;
 449         priv->event_log.next_entry = next_entry;
 450 }
 451
 452 /**
 453  * iwl_bg_ucode_trace - Timer callback to log ucode event
 454  *
 455  * The timer is continually set to execute every
 456  * UCODE_TRACE_PERIOD milliseconds after the last timer expired
 457  * this function is to perform continuous uCode event logging operation
 458  * if enabled
 459  */
 460 static void iwl_bg_ucode_trace(unsigned long data)
 461 {
 462         struct iwl_priv *priv = (struct iwl_priv *)data;
 463
 464         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 465                 return;
 466
 467         if (priv->event_log.ucode_trace) {
 468                 iwl_continuous_event_trace(priv);
 469                 /* Reschedule the timer to occur in UCODE_TRACE_PERIOD */
 470                 mod_timer(&priv->ucode_trace,
 471                          jiffies + msecs_to_jiffies(UCODE_TRACE_PERIOD));
 472         }
 473 }
 474
 475 static void iwl_bg_tx_flush(struct work_struct *work)
 476 {
 477         struct iwl_priv *priv =
 478                 container_of(work, struct iwl_priv, tx_flush);
 479
 480         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 481                 return;
 482
 483         /* do nothing if rf-kill is on */
 484         if (!iwl_is_ready_rf(priv))
 485                 return;
 486
 487         IWL_DEBUG_INFO(priv, "device request: flush all tx frames\n");
 488         iwlagn_dev_txfifo_flush(priv, IWL_DROP_ALL);
 489 }
 490
 491 static void iwl_init_context(struct iwl_priv *priv, u32 ucode_flags)
 492 {
 493         int i;
 494
 495         /*
 496          * The default context is always valid,
 497          * the PAN context depends on uCode.
 498          */
 499         priv->shrd->valid_contexts = BIT(IWL_RXON_CTX_BSS);
 500         if (ucode_flags & IWL_UCODE_TLV_FLAGS_PAN)
 501                 priv->shrd->valid_contexts |= BIT(IWL_RXON_CTX_PAN);
 502
 503         for (i = 0; i < NUM_IWL_RXON_CTX; i++)
 504                 priv->contexts[i].ctxid = i;
 505
 506         priv->contexts[IWL_RXON_CTX_BSS].always_active = true;
 507         priv->contexts[IWL_RXON_CTX_BSS].is_active = true;
 508         priv->contexts[IWL_RXON_CTX_BSS].rxon_cmd = REPLY_RXON;
 509         priv->contexts[IWL_RXON_CTX_BSS].rxon_timing_cmd = REPLY_RXON_TIMING;
 510         priv->contexts[IWL_RXON_CTX_BSS].rxon_assoc_cmd = REPLY_RXON_ASSOC;
 511         priv->contexts[IWL_RXON_CTX_BSS].qos_cmd = REPLY_QOS_PARAM;
 512         priv->contexts[IWL_RXON_CTX_BSS].ap_sta_id = IWL_AP_ID;
 513         priv->contexts[IWL_RXON_CTX_BSS].wep_key_cmd = REPLY_WEPKEY;
 514         priv->contexts[IWL_RXON_CTX_BSS].bcast_sta_id = IWLAGN_BROADCAST_ID;
 515         priv->contexts[IWL_RXON_CTX_BSS].exclusive_interface_modes =
 516                 BIT(NL80211_IFTYPE_ADHOC);
 517         priv->contexts[IWL_RXON_CTX_BSS].interface_modes =
 518                 BIT(NL80211_IFTYPE_STATION);
 519         priv->contexts[IWL_RXON_CTX_BSS].ap_devtype = RXON_DEV_TYPE_AP;
 520         priv->contexts[IWL_RXON_CTX_BSS].ibss_devtype = RXON_DEV_TYPE_IBSS;
 521         priv->contexts[IWL_RXON_CTX_BSS].station_devtype = RXON_DEV_TYPE_ESS;
 522         priv->contexts[IWL_RXON_CTX_BSS].unused_devtype = RXON_DEV_TYPE_ESS;
 523
 524         priv->contexts[IWL_RXON_CTX_PAN].rxon_cmd = REPLY_WIPAN_RXON;
 525         priv->contexts[IWL_RXON_CTX_PAN].rxon_timing_cmd =
 526                 REPLY_WIPAN_RXON_TIMING;
 527         priv->contexts[IWL_RXON_CTX_PAN].rxon_assoc_cmd =
 528                 REPLY_WIPAN_RXON_ASSOC;
 529         priv->contexts[IWL_RXON_CTX_PAN].qos_cmd = REPLY_WIPAN_QOS_PARAM;
 530         priv->contexts[IWL_RXON_CTX_PAN].ap_sta_id = IWL_AP_ID_PAN;
 531         priv->contexts[IWL_RXON_CTX_PAN].wep_key_cmd = REPLY_WIPAN_WEPKEY;
 532         priv->contexts[IWL_RXON_CTX_PAN].bcast_sta_id = IWLAGN_PAN_BCAST_ID;
 533         priv->contexts[IWL_RXON_CTX_PAN].station_flags = STA_FLG_PAN_STATION;
 534         priv->contexts[IWL_RXON_CTX_PAN].interface_modes =
 535                 BIT(NL80211_IFTYPE_STATION) | BIT(NL80211_IFTYPE_AP);
 536
 537         if (ucode_flags & IWL_UCODE_TLV_FLAGS_P2P)
 538                 priv->contexts[IWL_RXON_CTX_PAN].interface_modes |=
 539                         BIT(NL80211_IFTYPE_P2P_CLIENT) |
 540                         BIT(NL80211_IFTYPE_P2P_GO);
 541
 542         priv->contexts[IWL_RXON_CTX_PAN].ap_devtype = RXON_DEV_TYPE_CP;
 543         priv->contexts[IWL_RXON_CTX_PAN].station_devtype = RXON_DEV_TYPE_2STA;
 544         priv->contexts[IWL_RXON_CTX_PAN].unused_devtype = RXON_DEV_TYPE_P2P;
 545
 546         BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
 547 }
 548
 549 static void iwl_rf_kill_ct_config(struct iwl_priv *priv)
 550 {
 551         struct iwl_ct_kill_config cmd;
 552         struct iwl_ct_kill_throttling_config adv_cmd;
 553         int ret = 0;
 554
 555         iwl_write32(trans(priv), CSR_UCODE_DRV_GP1_CLR,
 556                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
 557
 558         priv->thermal_throttle.ct_kill_toggle = false;
 559
 560         if (cfg(priv)->base_params->support_ct_kill_exit) {
 561                 adv_cmd.critical_temperature_enter =
 562                         cpu_to_le32(hw_params(priv).ct_kill_threshold);
 563                 adv_cmd.critical_temperature_exit =
 564                         cpu_to_le32(hw_params(priv).ct_kill_exit_threshold);
 565
 566                 ret = iwl_dvm_send_cmd_pdu(priv,
 567                                        REPLY_CT_KILL_CONFIG_CMD,
 568                                        CMD_SYNC, sizeof(adv_cmd), &adv_cmd);
 569                 if (ret)
 570                         IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
 571                 else
 572                         IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
 573                                 "succeeded, critical temperature enter is %d,"
 574                                 "exit is %d\n",
 575                                 hw_params(priv).ct_kill_threshold,
 576                                 hw_params(priv).ct_kill_exit_threshold);
 577         } else {
 578                 cmd.critical_temperature_R =
 579                         cpu_to_le32(hw_params(priv).ct_kill_threshold);
 580
 581                 ret = iwl_dvm_send_cmd_pdu(priv,
 582                                        REPLY_CT_KILL_CONFIG_CMD,
 583                                        CMD_SYNC, sizeof(cmd), &cmd);
 584                 if (ret)
 585                         IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
 586                 else
 587                         IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
 588                                 "succeeded, "
 589                                 "critical temperature is %d\n",
 590                                 hw_params(priv).ct_kill_threshold);
 591         }
 592 }
 593
 594 static int iwlagn_send_calib_cfg_rt(struct iwl_priv *priv, u32 cfg)
 595 {
 596         struct iwl_calib_cfg_cmd calib_cfg_cmd;
 597         struct iwl_host_cmd cmd = {
 598                 .id = CALIBRATION_CFG_CMD,
 599                 .len = { sizeof(struct iwl_calib_cfg_cmd), },
 600                 .data = { &calib_cfg_cmd, },
 601         };
 602
 603         memset(&calib_cfg_cmd, 0, sizeof(calib_cfg_cmd));
 604         calib_cfg_cmd.ucd_calib_cfg.once.is_enable = IWL_CALIB_RT_CFG_ALL;
 605         calib_cfg_cmd.ucd_calib_cfg.once.start = cpu_to_le32(cfg);
 606
 607         return iwl_dvm_send_cmd(priv, &cmd);
 608 }
 609
 610
 611 static int iwlagn_send_tx_ant_config(struct iwl_priv *priv, u8 valid_tx_ant)
 612 {
 613         struct iwl_tx_ant_config_cmd tx_ant_cmd = {
 614           .valid = cpu_to_le32(valid_tx_ant),
 615         };
 616
 617         if (IWL_UCODE_API(priv->fw->ucode_ver) > 1) {
 618                 IWL_DEBUG_HC(priv, "select valid tx ant: %u\n", valid_tx_ant);
 619                 return iwl_dvm_send_cmd_pdu(priv,
 620                                         TX_ANT_CONFIGURATION_CMD,
 621                                         CMD_SYNC,
 622                                         sizeof(struct iwl_tx_ant_config_cmd),
 623                                         &tx_ant_cmd);
 624         } else {
 625                 IWL_DEBUG_HC(priv, "TX_ANT_CONFIGURATION_CMD not supported\n");
 626                 return -EOPNOTSUPP;
 627         }
 628 }
 629
 630 /**
 631  * iwl_alive_start - called after REPLY_ALIVE notification received
 632  *                   from protocol/runtime uCode (initialization uCode's
 633  *                   Alive gets handled by iwl_init_alive_start()).
 634  */
 635 int iwl_alive_start(struct iwl_priv *priv)
 636 {
 637         int ret = 0;
 638         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 639
 640         IWL_DEBUG_INFO(priv, "Runtime Alive received.\n");
 641
 642         /* After the ALIVE response, we can send host commands to the uCode */
 643         set_bit(STATUS_ALIVE, &priv->status);
 644
 645         /* Enable watchdog to monitor the driver tx queues */
 646         iwl_setup_watchdog(priv);
 647
 648         if (iwl_is_rfkill(priv))
 649                 return -ERFKILL;
 650
 651         if (priv->event_log.ucode_trace) {
 652                 /* start collecting data now */
 653                 mod_timer(&priv->ucode_trace, jiffies);
 654         }
 655
 656         /* download priority table before any calibration request */
 657         if (cfg(priv)->bt_params &&
 658             cfg(priv)->bt_params->advanced_bt_coexist) {
 659                 /* Configure Bluetooth device coexistence support */
 660                 if (cfg(priv)->bt_params->bt_sco_disable)
 661                         priv->bt_enable_pspoll = false;
 662                 else
 663                         priv->bt_enable_pspoll = true;
 664
 665                 priv->bt_valid = IWLAGN_BT_ALL_VALID_MSK;
 666                 priv->kill_ack_mask = IWLAGN_BT_KILL_ACK_MASK_DEFAULT;
 667                 priv->kill_cts_mask = IWLAGN_BT_KILL_CTS_MASK_DEFAULT;
 668                 iwlagn_send_advance_bt_config(priv);
 669                 priv->bt_valid = IWLAGN_BT_VALID_ENABLE_FLAGS;
 670                 priv->cur_rssi_ctx = NULL;
 671
 672                 iwl_send_prio_tbl(priv);
 673
 674                 /* FIXME: w/a to force change uCode BT state machine */
 675                 ret = iwl_send_bt_env(priv, IWL_BT_COEX_ENV_OPEN,
 676                                          BT_COEX_PRIO_TBL_EVT_INIT_CALIB2);
 677                 if (ret)
 678                         return ret;
 679                 ret = iwl_send_bt_env(priv, IWL_BT_COEX_ENV_CLOSE,
 680                                          BT_COEX_PRIO_TBL_EVT_INIT_CALIB2);
 681                 if (ret)
 682                         return ret;
 683         } else {
 684                 /*
 685                  * default is 2-wire BT coexexistence support
 686                  */
 687                 iwl_send_bt_config(priv);
 688         }
 689
 690         /*
 691          * Perform runtime calibrations, including DC calibration.
 692          */
 693         iwlagn_send_calib_cfg_rt(priv, IWL_CALIB_CFG_DC_IDX);
 694
 695         ieee80211_wake_queues(priv->hw);
 696
 697         priv->active_rate = IWL_RATES_MASK;
 698
 699         /* Configure Tx antenna selection based on H/W config */
 700         iwlagn_send_tx_ant_config(priv, hw_params(priv).valid_tx_ant);
 701
 702         if (iwl_is_associated_ctx(ctx) && !priv->wowlan) {
 703                 struct iwl_rxon_cmd *active_rxon =
 704                                 (struct iwl_rxon_cmd *)&ctx->active;
 705                 /* apply any changes in staging */
 706                 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
 707                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
 708         } else {
 709                 struct iwl_rxon_context *tmp;
 710                 /* Initialize our rx_config data */
 711                 for_each_context(priv, tmp)
 712                         iwl_connection_init_rx_config(priv, tmp);
 713
 714                 iwlagn_set_rxon_chain(priv, ctx);
 715         }
 716
 717         if (!priv->wowlan) {
 718                 /* WoWLAN ucode will not reply in the same way, skip it */
 719                 iwl_reset_run_time_calib(priv);
 720         }
 721
 722         set_bit(STATUS_READY, &priv->status);
 723
 724         /* Configure the adapter for unassociated operation */
 725         ret = iwlagn_commit_rxon(priv, ctx);
 726         if (ret)
 727                 return ret;
 728
 729         /* At this point, the NIC is initialized and operational */
 730         iwl_rf_kill_ct_config(priv);
 731
 732         IWL_DEBUG_INFO(priv, "ALIVE processing complete.\n");
 733
 734         return iwl_power_update_mode(priv, true);
 735 }
 736
 737 /**
 738  * iwl_clear_driver_stations - clear knowledge of all stations from driver
 739  * @priv: iwl priv struct
 740  *
 741  * This is called during iwl_down() to make sure that in the case
 742  * we're coming there from a hardware restart mac80211 will be
 743  * able to reconfigure stations -- if we're getting there in the
 744  * normal down flow then the stations will already be cleared.
 745  */
 746 static void iwl_clear_driver_stations(struct iwl_priv *priv)
 747 {
 748         struct iwl_rxon_context *ctx;
 749
 750         spin_lock_bh(&priv->sta_lock);
 751         memset(priv->stations, 0, sizeof(priv->stations));
 752         priv->num_stations = 0;
 753
 754         priv->ucode_key_table = 0;
 755
 756         for_each_context(priv, ctx) {
 757                 /*
 758                  * Remove all key information that is not stored as part
 759                  * of station information since mac80211 may not have had
 760                  * a chance to remove all the keys. When device is
 761                  * reconfigured by mac80211 after an error all keys will
 762                  * be reconfigured.
 763                  */
 764                 memset(ctx->wep_keys, 0, sizeof(ctx->wep_keys));
 765                 ctx->key_mapping_keys = 0;
 766         }
 767
 768         spin_unlock_bh(&priv->sta_lock);
 769 }
 770
 771 void iwl_down(struct iwl_priv *priv)
 772 {
 773         int exit_pending;
 774
 775         IWL_DEBUG_INFO(priv, DRV_NAME " is going down\n");
 776
 777         lockdep_assert_held(&priv->mutex);
 778
 779         iwl_scan_cancel_timeout(priv, 200);
 780
 781         /*
 782          * If active, scanning won't cancel it, so say it expired.
 783          * No race since we hold the mutex here and a new one
 784          * can't come in at this time.
 785          */
 786         ieee80211_remain_on_channel_expired(priv->hw);
 787
 788         exit_pending =
 789                 test_and_set_bit(STATUS_EXIT_PENDING, &priv->status);
 790
 791         /* Stop TX queues watchdog. We need to have STATUS_EXIT_PENDING bit set
 792          * to prevent rearm timer */
 793         del_timer_sync(&priv->watchdog);
 794
 795         iwl_clear_ucode_stations(priv, NULL);
 796         iwl_dealloc_bcast_stations(priv);
 797         iwl_clear_driver_stations(priv);
 798
 799         /* reset BT coex data */
 800         priv->bt_status = 0;
 801         priv->cur_rssi_ctx = NULL;
 802         priv->bt_is_sco = 0;
 803         if (cfg(priv)->bt_params)
 804                 priv->bt_traffic_load =
 805                          cfg(priv)->bt_params->bt_init_traffic_load;
 806         else
 807                 priv->bt_traffic_load = 0;
 808         priv->bt_full_concurrent = false;
 809         priv->bt_ci_compliance = 0;
 810
 811         /* Wipe out the EXIT_PENDING status bit if we are not actually
 812          * exiting the module */
 813         if (!exit_pending)
 814                 clear_bit(STATUS_EXIT_PENDING, &priv->status);
 815
 816         if (priv->mac80211_registered)
 817                 ieee80211_stop_queues(priv->hw);
 818
 819         priv->ucode_loaded = false;
 820         iwl_trans_stop_device(trans(priv));
 821
 822         /* Clear out all status bits but a few that are stable across reset */
 823         priv->status &= test_bit(STATUS_RF_KILL_HW, &priv->status) <<
 824                                 STATUS_RF_KILL_HW |
 825                         test_bit(STATUS_GEO_CONFIGURED, &priv->status) <<
 826                                 STATUS_GEO_CONFIGURED |
 827                         test_bit(STATUS_EXIT_PENDING, &priv->status) <<
 828                                 STATUS_EXIT_PENDING;
 829         priv->shrd->status &=
 830                         test_bit(STATUS_FW_ERROR, &priv->shrd->status) <<
 831                                 STATUS_FW_ERROR;
 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->status) ||
 851             test_bit(STATUS_SCANNING, &priv->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         bool bt_full_concurrent;
 867         u8 bt_ci_compliance;
 868         u8 bt_load;
 869         u8 bt_status;
 870         bool bt_is_sco;
 871
 872         lockdep_assert_held(&priv->mutex);
 873
 874         priv->is_open = 0;
 875
 876         /*
 877          * __iwl_down() will clear the BT status variables,
 878          * which is correct, but when we restart we really
 879          * want to keep them so restore them afterwards.
 880          *
 881          * The restart process will later pick them up and
 882          * re-configure the hw when we reconfigure the BT
 883          * command.
 884          */
 885         bt_full_concurrent = priv->bt_full_concurrent;
 886         bt_ci_compliance = priv->bt_ci_compliance;
 887         bt_load = priv->bt_traffic_load;
 888         bt_status = priv->bt_status;
 889         bt_is_sco = priv->bt_is_sco;
 890
 891         iwl_down(priv);
 892
 893         priv->bt_full_concurrent = bt_full_concurrent;
 894         priv->bt_ci_compliance = bt_ci_compliance;
 895         priv->bt_traffic_load = bt_load;
 896         priv->bt_status = bt_status;
 897         priv->bt_is_sco = bt_is_sco;
 898 }
 899
 900 static void iwl_bg_restart(struct work_struct *data)
 901 {
 902         struct iwl_priv *priv = container_of(data, struct iwl_priv, restart);
 903
 904         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 905                 return;
 906
 907         if (test_and_clear_bit(STATUS_FW_ERROR, &priv->shrd->status)) {
 908                 mutex_lock(&priv->mutex);
 909                 iwlagn_prepare_restart(priv);
 910                 mutex_unlock(&priv->mutex);
 911                 iwl_cancel_deferred_work(priv);
 912                 ieee80211_restart_hw(priv->hw);
 913         } else {
 914                 WARN_ON(1);
 915         }
 916 }
 917
 918
 919
 920
 921 void iwlagn_disable_roc(struct iwl_priv *priv)
 922 {
 923         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_PAN];
 924
 925         lockdep_assert_held(&priv->mutex);
 926
 927         if (!priv->hw_roc_setup)
 928                 return;
 929
 930         ctx->staging.dev_type = RXON_DEV_TYPE_P2P;
 931         ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
 932
 933         priv->hw_roc_channel = NULL;
 934
 935         memset(ctx->staging.node_addr, 0, ETH_ALEN);
 936
 937         iwlagn_commit_rxon(priv, ctx);
 938
 939         ctx->is_active = false;
 940         priv->hw_roc_setup = false;
 941 }
 942
 943 static void iwlagn_disable_roc_work(struct work_struct *work)
 944 {
 945         struct iwl_priv *priv = container_of(work, struct iwl_priv,
 946                                              hw_roc_disable_work.work);
 947
 948         mutex_lock(&priv->mutex);
 949         iwlagn_disable_roc(priv);
 950         mutex_unlock(&priv->mutex);
 951 }
 952
 953 /*****************************************************************************
 954  *
 955  * driver setup and teardown
 956  *
 957  *****************************************************************************/
 958
 959 static void iwl_setup_deferred_work(struct iwl_priv *priv)
 960 {
 961         priv->workqueue = create_singlethread_workqueue(DRV_NAME);
 962
 963         INIT_WORK(&priv->restart, iwl_bg_restart);
 964         INIT_WORK(&priv->beacon_update, iwl_bg_beacon_update);
 965         INIT_WORK(&priv->run_time_calib_work, iwl_bg_run_time_calib_work);
 966         INIT_WORK(&priv->tx_flush, iwl_bg_tx_flush);
 967         INIT_WORK(&priv->bt_full_concurrency, iwl_bg_bt_full_concurrency);
 968         INIT_WORK(&priv->bt_runtime_config, iwl_bg_bt_runtime_config);
 969         INIT_DELAYED_WORK(&priv->hw_roc_disable_work,
 970                           iwlagn_disable_roc_work);
 971
 972         iwl_setup_scan_deferred_work(priv);
 973
 974         if (cfg(priv)->bt_params)
 975                 iwlagn_bt_setup_deferred_work(priv);
 976
 977         init_timer(&priv->statistics_periodic);
 978         priv->statistics_periodic.data = (unsigned long)priv;
 979         priv->statistics_periodic.function = iwl_bg_statistics_periodic;
 980
 981         init_timer(&priv->ucode_trace);
 982         priv->ucode_trace.data = (unsigned long)priv;
 983         priv->ucode_trace.function = iwl_bg_ucode_trace;
 984
 985         init_timer(&priv->watchdog);
 986         priv->watchdog.data = (unsigned long)priv;
 987         priv->watchdog.function = iwl_bg_watchdog;
 988 }
 989
 990 void iwl_cancel_deferred_work(struct iwl_priv *priv)
 991 {
 992         if (cfg(priv)->bt_params)
 993                 iwlagn_bt_cancel_deferred_work(priv);
 994
 995         cancel_work_sync(&priv->run_time_calib_work);
 996         cancel_work_sync(&priv->beacon_update);
 997
 998         iwl_cancel_scan_deferred_work(priv);
 999
1000         cancel_work_sync(&priv->bt_full_concurrency);
1001         cancel_work_sync(&priv->bt_runtime_config);
1002         cancel_delayed_work_sync(&priv->hw_roc_disable_work);
1003
1004         del_timer_sync(&priv->statistics_periodic);
1005         del_timer_sync(&priv->ucode_trace);
1006 }
1007
1008 static void iwl_init_hw_rates(struct ieee80211_rate *rates)
1009 {
1010         int i;
1011
1012         for (i = 0; i < IWL_RATE_COUNT_LEGACY; i++) {
1013                 rates[i].bitrate = iwl_rates[i].ieee * 5;
1014                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
1015                 rates[i].hw_value_short = i;
1016                 rates[i].flags = 0;
1017                 if ((i >= IWL_FIRST_CCK_RATE) && (i <= IWL_LAST_CCK_RATE)) {
1018                         /*
1019                          * If CCK != 1M then set short preamble rate flag.
1020                          */
1021                         rates[i].flags |=
1022                                 (iwl_rates[i].plcp == IWL_RATE_1M_PLCP) ?
1023                                         0 : IEEE80211_RATE_SHORT_PREAMBLE;
1024                 }
1025         }
1026 }
1027
1028 static int iwl_init_drv(struct iwl_priv *priv)
1029 {
1030         int ret;
1031
1032         spin_lock_init(&priv->sta_lock);
1033
1034         mutex_init(&priv->mutex);
1035
1036         INIT_LIST_HEAD(&priv->calib_results);
1037
1038         priv->ieee_channels = NULL;
1039         priv->ieee_rates = NULL;
1040         priv->band = IEEE80211_BAND_2GHZ;
1041
1042         priv->plcp_delta_threshold =
1043                 cfg(priv)->base_params->plcp_delta_threshold;
1044
1045         priv->iw_mode = NL80211_IFTYPE_STATION;
1046         priv->current_ht_config.smps = IEEE80211_SMPS_STATIC;
1047         priv->missed_beacon_threshold = IWL_MISSED_BEACON_THRESHOLD_DEF;
1048         priv->agg_tids_count = 0;
1049
1050         priv->ucode_owner = IWL_OWNERSHIP_DRIVER;
1051
1052         /* initialize force reset */
1053         priv->force_reset[IWL_RF_RESET].reset_duration =
1054                 IWL_DELAY_NEXT_FORCE_RF_RESET;
1055         priv->force_reset[IWL_FW_RESET].reset_duration =
1056                 IWL_DELAY_NEXT_FORCE_FW_RELOAD;
1057
1058         priv->rx_statistics_jiffies = jiffies;
1059
1060         /* Choose which receivers/antennas to use */
1061         iwlagn_set_rxon_chain(priv, &priv->contexts[IWL_RXON_CTX_BSS]);
1062
1063         iwl_init_scan_params(priv);
1064
1065         /* init bt coex */
1066         if (cfg(priv)->bt_params &&
1067             cfg(priv)->bt_params->advanced_bt_coexist) {
1068                 priv->kill_ack_mask = IWLAGN_BT_KILL_ACK_MASK_DEFAULT;
1069                 priv->kill_cts_mask = IWLAGN_BT_KILL_CTS_MASK_DEFAULT;
1070                 priv->bt_valid = IWLAGN_BT_ALL_VALID_MSK;
1071                 priv->bt_on_thresh = BT_ON_THRESHOLD_DEF;
1072                 priv->bt_duration = BT_DURATION_LIMIT_DEF;
1073                 priv->dynamic_frag_thresh = BT_FRAG_THRESHOLD_DEF;
1074         }
1075
1076         ret = iwl_init_channel_map(priv);
1077         if (ret) {
1078                 IWL_ERR(priv, "initializing regulatory failed: %d\n", ret);
1079                 goto err;
1080         }
1081
1082         ret = iwl_init_geos(priv);
1083         if (ret) {
1084                 IWL_ERR(priv, "initializing geos failed: %d\n", ret);
1085                 goto err_free_channel_map;
1086         }
1087         iwl_init_hw_rates(priv->ieee_rates);
1088
1089         return 0;
1090
1091 err_free_channel_map:
1092         iwl_free_channel_map(priv);
1093 err:
1094         return ret;
1095 }
1096
1097 static void iwl_uninit_drv(struct iwl_priv *priv)
1098 {
1099         iwl_free_geos(priv);
1100         iwl_free_channel_map(priv);
1101         kfree(priv->scan_cmd);
1102         kfree(priv->beacon_cmd);
1103         kfree(rcu_dereference_raw(priv->noa_data));
1104         iwl_calib_free_results(priv);
1105 #ifdef CONFIG_IWLWIFI_DEBUGFS
1106         kfree(priv->wowlan_sram);
1107 #endif
1108 }
1109
1110 /* Size of one Rx buffer in host DRAM */
1111 #define IWL_RX_BUF_SIZE_4K (4 * 1024)
1112 #define IWL_RX_BUF_SIZE_8K (8 * 1024)
1113
1114 static void iwl_set_hw_params(struct iwl_priv *priv)
1115 {
1116         if (cfg(priv)->ht_params)
1117                 hw_params(priv).use_rts_for_aggregation =
1118                         cfg(priv)->ht_params->use_rts_for_aggregation;
1119
1120         if (iwlagn_mod_params.amsdu_size_8K)
1121                 hw_params(priv).rx_page_order =
1122                         get_order(IWL_RX_BUF_SIZE_8K);
1123         else
1124                 hw_params(priv).rx_page_order =
1125                         get_order(IWL_RX_BUF_SIZE_4K);
1126
1127         if (iwlagn_mod_params.disable_11n & IWL_DISABLE_HT_ALL)
1128                 hw_params(priv).sku &= ~EEPROM_SKU_CAP_11N_ENABLE;
1129
1130         hw_params(priv).num_ampdu_queues =
1131                 cfg(priv)->base_params->num_of_ampdu_queues;
1132         hw_params(priv).wd_timeout = cfg(priv)->base_params->wd_timeout;
1133
1134         /* Device-specific setup */
1135         cfg(priv)->lib->set_hw_params(priv);
1136 }
1137
1138
1139
1140 static void iwl_debug_config(struct iwl_priv *priv)
1141 {
1142         dev_printk(KERN_INFO, trans(priv)->dev, "CONFIG_IWLWIFI_DEBUG "
1143 #ifdef CONFIG_IWLWIFI_DEBUG
1144                 "enabled\n");
1145 #else
1146                 "disabled\n");
1147 #endif
1148         dev_printk(KERN_INFO, trans(priv)->dev, "CONFIG_IWLWIFI_DEBUGFS "
1149 #ifdef CONFIG_IWLWIFI_DEBUGFS
1150                 "enabled\n");
1151 #else
1152                 "disabled\n");
1153 #endif
1154         dev_printk(KERN_INFO, trans(priv)->dev, "CONFIG_IWLWIFI_DEVICE_TRACING "
1155 #ifdef CONFIG_IWLWIFI_DEVICE_TRACING
1156                 "enabled\n");
1157 #else
1158                 "disabled\n");
1159 #endif
1160
1161         dev_printk(KERN_INFO, trans(priv)->dev, "CONFIG_IWLWIFI_DEVICE_TESTMODE "
1162 #ifdef CONFIG_IWLWIFI_DEVICE_TESTMODE
1163                 "enabled\n");
1164 #else
1165                 "disabled\n");
1166 #endif
1167         dev_printk(KERN_INFO, trans(priv)->dev, "CONFIG_IWLWIFI_P2P "
1168 #ifdef CONFIG_IWLWIFI_P2P
1169                 "enabled\n");
1170 #else
1171                 "disabled\n");
1172 #endif
1173 }
1174
1175 static struct iwl_op_mode *iwl_op_mode_dvm_start(struct iwl_trans *trans,
1176                                                  const struct iwl_fw *fw)
1177 {
1178         int err = 0;
1179         struct iwl_priv *priv;
1180         struct ieee80211_hw *hw;
1181         struct iwl_op_mode *op_mode;
1182         u16 num_mac;
1183         u32 ucode_flags;
1184         struct iwl_trans_config trans_cfg;
1185         static const u8 no_reclaim_cmds[] = {
1186                 REPLY_RX_PHY_CMD,
1187                 REPLY_RX,
1188                 REPLY_RX_MPDU_CMD,
1189                 REPLY_COMPRESSED_BA,
1190                 STATISTICS_NOTIFICATION,
1191                 REPLY_TX,
1192         };
1193
1194         /************************
1195          * 1. Allocating HW data
1196          ************************/
1197         hw = iwl_alloc_all();
1198         if (!hw) {
1199                 pr_err("%s: Cannot allocate network device\n",
1200                                 cfg(trans)->name);
1201                 err = -ENOMEM;
1202                 goto out;
1203         }
1204
1205         op_mode = hw->priv;
1206         op_mode->ops = &iwl_dvm_ops;
1207         priv = IWL_OP_MODE_GET_DVM(op_mode);
1208         priv->shrd = trans->shrd;
1209         priv->fw = fw;
1210         /* TODO: remove fw from shared data later */
1211         priv->shrd->fw = fw;
1212
1213         /*
1214          * Populate the state variables that the transport layer needs
1215          * to know about.
1216          */
1217         trans_cfg.op_mode = op_mode;
1218         trans_cfg.no_reclaim_cmds = no_reclaim_cmds;
1219         trans_cfg.n_no_reclaim_cmds = ARRAY_SIZE(no_reclaim_cmds);
1220
1221         ucode_flags = fw->ucode_capa.flags;
1222
1223 #ifndef CONFIG_IWLWIFI_P2P
1224         ucode_flags &= ~IWL_UCODE_TLV_FLAGS_PAN;
1225 #endif
1226
1227         if (ucode_flags & IWL_UCODE_TLV_FLAGS_PAN) {
1228                 priv->sta_key_max_num = STA_KEY_MAX_NUM_PAN;
1229                 trans_cfg.cmd_queue = IWL_IPAN_CMD_QUEUE_NUM;
1230         } else {
1231                 priv->sta_key_max_num = STA_KEY_MAX_NUM;
1232                 trans_cfg.cmd_queue = IWL_DEFAULT_CMD_QUEUE_NUM;
1233         }
1234
1235         /* Configure transport layer */
1236         iwl_trans_configure(trans(priv), &trans_cfg);
1237
1238         /* At this point both hw and priv are allocated. */
1239
1240         SET_IEEE80211_DEV(priv->hw, trans(priv)->dev);
1241
1242         /* show what debugging capabilities we have */
1243         iwl_debug_config(priv);
1244
1245         IWL_DEBUG_INFO(priv, "*** LOAD DRIVER ***\n");
1246
1247         /* is antenna coupling more than 35dB ? */
1248         priv->bt_ant_couple_ok =
1249                 (iwlagn_mod_params.ant_coupling >
1250                         IWL_BT_ANTENNA_COUPLING_THRESHOLD) ?
1251                         true : false;
1252
1253         /* enable/disable bt channel inhibition */
1254         priv->bt_ch_announce = iwlagn_mod_params.bt_ch_announce;
1255         IWL_DEBUG_INFO(priv, "BT channel inhibition is %s\n",
1256                        (priv->bt_ch_announce) ? "On" : "Off");
1257
1258         if (iwl_alloc_traffic_mem(priv))
1259                 IWL_ERR(priv, "Not enough memory to generate traffic log\n");
1260
1261         /* these spin locks will be used in apm_ops.init and EEPROM access
1262          * we should init now
1263          */
1264         spin_lock_init(&trans(priv)->reg_lock);
1265         spin_lock_init(&priv->statistics.lock);
1266
1267         /***********************
1268          * 2. Read REV register
1269          ***********************/
1270         IWL_INFO(priv, "Detected %s, REV=0x%X\n",
1271                 cfg(priv)->name, trans(priv)->hw_rev);
1272
1273         err = iwl_trans_start_hw(trans(priv));
1274         if (err)
1275                 goto out_free_traffic_mem;
1276
1277         /*****************
1278          * 3. Read EEPROM
1279          *****************/
1280         err = iwl_eeprom_init(trans(priv), trans(priv)->hw_rev);
1281         /* Reset chip to save power until we load uCode during "up". */
1282         iwl_trans_stop_hw(trans(priv));
1283         if (err) {
1284                 IWL_ERR(priv, "Unable to init EEPROM\n");
1285                 goto out_free_traffic_mem;
1286         }
1287         err = iwl_eeprom_check_version(priv);
1288         if (err)
1289                 goto out_free_eeprom;
1290
1291         err = iwl_eeprom_init_hw_params(priv);
1292         if (err)
1293                 goto out_free_eeprom;
1294
1295         /* extract MAC Address */
1296         iwl_eeprom_get_mac(priv->shrd, priv->addresses[0].addr);
1297         IWL_DEBUG_INFO(priv, "MAC address: %pM\n", priv->addresses[0].addr);
1298         priv->hw->wiphy->addresses = priv->addresses;
1299         priv->hw->wiphy->n_addresses = 1;
1300         num_mac = iwl_eeprom_query16(priv->shrd, EEPROM_NUM_MAC_ADDRESS);
1301         if (num_mac > 1) {
1302                 memcpy(priv->addresses[1].addr, priv->addresses[0].addr,
1303                        ETH_ALEN);
1304                 priv->addresses[1].addr[5]++;
1305                 priv->hw->wiphy->n_addresses++;
1306         }
1307
1308         /************************
1309          * 4. Setup HW constants
1310          ************************/
1311         iwl_set_hw_params(priv);
1312
1313         if (!(hw_params(priv).sku & EEPROM_SKU_CAP_IPAN_ENABLE)) {
1314                 IWL_DEBUG_INFO(priv, "Your EEPROM disabled PAN");
1315                 ucode_flags &= ~IWL_UCODE_TLV_FLAGS_PAN;
1316                 /*
1317                  * if not PAN, then don't support P2P -- might be a uCode
1318                  * packaging bug or due to the eeprom check above
1319                  */
1320                 ucode_flags &= ~IWL_UCODE_TLV_FLAGS_P2P;
1321                 priv->sta_key_max_num = STA_KEY_MAX_NUM;
1322                 trans_cfg.cmd_queue = IWL_DEFAULT_CMD_QUEUE_NUM;
1323
1324                 /* Configure transport layer again*/
1325                 iwl_trans_configure(trans(priv), &trans_cfg);
1326         }
1327
1328         /*******************
1329          * 5. Setup priv
1330          *******************/
1331
1332         err = iwl_init_drv(priv);
1333         if (err)
1334                 goto out_free_eeprom;
1335         /* At this point both hw and priv are initialized. */
1336
1337         /********************
1338          * 6. Setup services
1339          ********************/
1340         iwl_setup_deferred_work(priv);
1341         iwl_setup_rx_handlers(priv);
1342         iwl_testmode_init(priv);
1343
1344         iwl_power_initialize(priv);
1345         iwl_tt_initialize(priv);
1346
1347         snprintf(priv->hw->wiphy->fw_version,
1348                  sizeof(priv->hw->wiphy->fw_version),
1349                  "%s", fw->fw_version);
1350
1351         priv->new_scan_threshold_behaviour =
1352                 !!(ucode_flags & IWL_UCODE_TLV_FLAGS_NEWSCAN);
1353
1354         priv->phy_calib_chain_noise_reset_cmd =
1355                 fw->ucode_capa.standard_phy_calibration_size;
1356         priv->phy_calib_chain_noise_gain_cmd =
1357                 fw->ucode_capa.standard_phy_calibration_size + 1;
1358
1359         /* initialize all valid contexts */
1360         iwl_init_context(priv, ucode_flags);
1361
1362         /**************************************************
1363          * This is still part of probe() in a sense...
1364          *
1365          * 7. Setup and register with mac80211 and debugfs
1366          **************************************************/
1367         err = iwlagn_mac_setup_register(priv, &fw->ucode_capa);
1368         if (err)
1369                 goto out_destroy_workqueue;
1370
1371         err = iwl_dbgfs_register(priv, DRV_NAME);
1372         if (err)
1373                 IWL_ERR(priv,
1374                         "failed to create debugfs files. Ignoring error: %d\n",
1375                         err);
1376
1377         return op_mode;
1378
1379 out_destroy_workqueue:
1380         destroy_workqueue(priv->workqueue);
1381         priv->workqueue = NULL;
1382         iwl_uninit_drv(priv);
1383 out_free_eeprom:
1384         iwl_eeprom_free(priv->shrd);
1385 out_free_traffic_mem:
1386         iwl_free_traffic_mem(priv);
1387         ieee80211_free_hw(priv->hw);
1388 out:
1389         op_mode = NULL;
1390         return op_mode;
1391 }
1392
1393 static void iwl_op_mode_dvm_stop(struct iwl_op_mode *op_mode)
1394 {
1395         struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
1396
1397         IWL_DEBUG_INFO(priv, "*** UNLOAD DRIVER ***\n");
1398
1399         iwl_dbgfs_unregister(priv);
1400
1401         iwl_testmode_cleanup(priv);
1402         iwlagn_mac_unregister(priv);
1403
1404         iwl_tt_exit(priv);
1405
1406         /*This will stop the queues, move the device to low power state */
1407         priv->ucode_loaded = false;
1408         iwl_trans_stop_device(trans(priv));
1409
1410         iwl_eeprom_free(priv->shrd);
1411
1412         /*netif_stop_queue(dev); */
1413         flush_workqueue(priv->workqueue);
1414
1415         /* ieee80211_unregister_hw calls iwlagn_mac_stop, which flushes
1416          * priv->workqueue... so we can't take down the workqueue
1417          * until now... */
1418         destroy_workqueue(priv->workqueue);
1419         priv->workqueue = NULL;
1420         iwl_free_traffic_mem(priv);
1421
1422         iwl_uninit_drv(priv);
1423
1424         dev_kfree_skb(priv->beacon_skb);
1425
1426         ieee80211_free_hw(priv->hw);
1427 }
1428
1429 static void iwl_cmd_queue_full(struct iwl_op_mode *op_mode)
1430 {
1431         struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
1432
1433         if (!iwl_check_for_ct_kill(priv)) {
1434                 IWL_ERR(priv, "Restarting adapter queue is full\n");
1435                 iwl_nic_error(op_mode);
1436         }
1437 }
1438
1439 static void iwl_nic_config(struct iwl_op_mode *op_mode)
1440 {
1441         struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
1442
1443         cfg(priv)->lib->nic_config(priv);
1444 }
1445
1446 static void iwl_stop_sw_queue(struct iwl_op_mode *op_mode, u8 ac)
1447 {
1448         struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
1449
1450         set_bit(ac, &priv->transport_queue_stop);
1451         ieee80211_stop_queue(priv->hw, ac);
1452 }
1453
1454 static void iwl_wake_sw_queue(struct iwl_op_mode *op_mode, u8 ac)
1455 {
1456         struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
1457
1458         clear_bit(ac, &priv->transport_queue_stop);
1459
1460         if (!priv->passive_no_rx)
1461                 ieee80211_wake_queue(priv->hw, ac);
1462 }
1463
1464 void iwlagn_lift_passive_no_rx(struct iwl_priv *priv)
1465 {
1466         int ac;
1467
1468         if (!priv->passive_no_rx)
1469                 return;
1470
1471         for (ac = IEEE80211_AC_VO; ac < IEEE80211_NUM_ACS; ac++) {
1472                 if (!test_bit(ac, &priv->transport_queue_stop)) {
1473                         IWL_DEBUG_TX_QUEUES(priv, "Wake queue %d");
1474                         ieee80211_wake_queue(priv->hw, ac);
1475                 } else {
1476                         IWL_DEBUG_TX_QUEUES(priv, "Don't wake queue %d");
1477                 }
1478         }
1479
1480         priv->passive_no_rx = false;
1481 }
1482
1483 const struct iwl_op_mode_ops iwl_dvm_ops = {
1484         .start = iwl_op_mode_dvm_start,
1485         .stop = iwl_op_mode_dvm_stop,
1486         .rx = iwl_rx_dispatch,
1487         .queue_full = iwl_stop_sw_queue,
1488         .queue_not_full = iwl_wake_sw_queue,
1489         .hw_rf_kill = iwl_set_hw_rfkill_state,
1490         .free_skb = iwl_free_skb,
1491         .nic_error = iwl_nic_error,
1492         .cmd_queue_full = iwl_cmd_queue_full,
1493         .nic_config = iwl_nic_config,
1494 };
1495
1496 /*****************************************************************************
1497  *
1498  * driver and module entry point
1499  *
1500  *****************************************************************************/
1501
1502 struct kmem_cache *iwl_tx_cmd_pool;
1503
1504 static int __init iwl_init(void)
1505 {
1506
1507         int ret;
1508         pr_info(DRV_DESCRIPTION ", " DRV_VERSION "\n");
1509         pr_info(DRV_COPYRIGHT "\n");
1510
1511         iwl_tx_cmd_pool = kmem_cache_create("iwl_dev_cmd",
1512                                             sizeof(struct iwl_device_cmd),
1513                                             sizeof(void *), 0, NULL);
1514         if (!iwl_tx_cmd_pool)
1515                 return -ENOMEM;
1516
1517         ret = iwlagn_rate_control_register();
1518         if (ret) {
1519                 pr_err("Unable to register rate control algorithm: %d\n", ret);
1520                 goto error_rc_register;
1521         }
1522
1523         ret = iwl_pci_register_driver();
1524         if (ret)
1525                 goto error_pci_register;
1526         return ret;
1527
1528 error_pci_register:
1529         iwlagn_rate_control_unregister();
1530 error_rc_register:
1531         kmem_cache_destroy(iwl_tx_cmd_pool);
1532         return ret;
1533 }
1534
1535 static void __exit iwl_exit(void)
1536 {
1537         iwl_pci_unregister_driver();
1538         iwlagn_rate_control_unregister();
1539         kmem_cache_destroy(iwl_tx_cmd_pool);
1540 }
1541
1542 module_exit(iwl_exit);
1543 module_init(iwl_init);
1544
1545 #ifdef CONFIG_IWLWIFI_DEBUG
1546 module_param_named(debug, iwlagn_mod_params.debug_level, uint,
1547                    S_IRUGO | S_IWUSR);
1548 MODULE_PARM_DESC(debug, "debug output mask");
1549 #endif
1550
1551 module_param_named(swcrypto, iwlagn_mod_params.sw_crypto, int, S_IRUGO);
1552 MODULE_PARM_DESC(swcrypto, "using crypto in software (default 0 [hardware])");
1553 module_param_named(11n_disable, iwlagn_mod_params.disable_11n, uint, S_IRUGO);
1554 MODULE_PARM_DESC(11n_disable,
1555         "disable 11n functionality, bitmap: 1: full, 2: agg TX, 4: agg RX");
1556 module_param_named(amsdu_size_8K, iwlagn_mod_params.amsdu_size_8K,
1557                    int, S_IRUGO);
1558 MODULE_PARM_DESC(amsdu_size_8K, "enable 8K amsdu size");
1559 module_param_named(fw_restart, iwlagn_mod_params.restart_fw, int, S_IRUGO);
1560 MODULE_PARM_DESC(fw_restart, "restart firmware in case of error");
1561
1562 module_param_named(ucode_alternative,
1563                    iwlagn_mod_params.wanted_ucode_alternative,
1564                    int, S_IRUGO);
1565 MODULE_PARM_DESC(ucode_alternative,
1566                  "specify ucode alternative to use from ucode file");
1567
1568 module_param_named(antenna_coupling, iwlagn_mod_params.ant_coupling,
1569                    int, S_IRUGO);
1570 MODULE_PARM_DESC(antenna_coupling,
1571                  "specify antenna coupling in dB (defualt: 0 dB)");
1572
1573 module_param_named(bt_ch_inhibition, iwlagn_mod_params.bt_ch_announce,
1574                    bool, S_IRUGO);
1575 MODULE_PARM_DESC(bt_ch_inhibition,
1576                  "Enable BT channel inhibition (default: enable)");
1577
1578 module_param_named(plcp_check, iwlagn_mod_params.plcp_check, bool, S_IRUGO);
1579 MODULE_PARM_DESC(plcp_check, "Check plcp health (default: 1 [enabled])");
1580
1581 module_param_named(ack_check, iwlagn_mod_params.ack_check, bool, S_IRUGO);
1582 MODULE_PARM_DESC(ack_check, "Check ack health (default: 0 [disabled])");
1583
1584 module_param_named(wd_disable, iwlagn_mod_params.wd_disable, int, S_IRUGO);
1585 MODULE_PARM_DESC(wd_disable,
1586                 "Disable stuck queue watchdog timer 0=system default, "
1587                 "1=disable, 2=enable (default: 0)");
1588
1589 /*
1590  * set bt_coex_active to true, uCode will do kill/defer
1591  * every time the priority line is asserted (BT is sending signals on the
1592  * priority line in the PCIx).
1593  * set bt_coex_active to false, uCode will ignore the BT activity and
1594  * perform the normal operation
1595  *
1596  * User might experience transmit issue on some platform due to WiFi/BT
1597  * co-exist problem. The possible behaviors are:
1598  *   Able to scan and finding all the available AP
1599  *   Not able to associate with any AP
1600  * On those platforms, WiFi communication can be restored by set
1601  * "bt_coex_active" module parameter to "false"
1602  *
1603  * default: bt_coex_active = true (BT_COEX_ENABLE)
1604  */
1605 module_param_named(bt_coex_active, iwlagn_mod_params.bt_coex_active,
1606                 bool, S_IRUGO);
1607 MODULE_PARM_DESC(bt_coex_active, "enable wifi/bt co-exist (default: enable)");
1608
1609 module_param_named(led_mode, iwlagn_mod_params.led_mode, int, S_IRUGO);
1610 MODULE_PARM_DESC(led_mode, "0=system default, "
1611                 "1=On(RF On)/Off(RF Off), 2=blinking, 3=Off (default: 0)");
1612
1613 module_param_named(power_save, iwlagn_mod_params.power_save,
1614                 bool, S_IRUGO);
1615 MODULE_PARM_DESC(power_save,
1616                  "enable WiFi power management (default: disable)");
1617
1618 module_param_named(power_level, iwlagn_mod_params.power_level,
1619                 int, S_IRUGO);
1620 MODULE_PARM_DESC(power_level,
1621                  "default power save level (range from 1 - 5, default: 1)");
1622
1623 module_param_named(auto_agg, iwlagn_mod_params.auto_agg,
1624                 bool, S_IRUGO);
1625 MODULE_PARM_DESC(auto_agg,
1626                  "enable agg w/o check traffic load (default: enable)");
1627
1628 /*
1629  * For now, keep using power level 1 instead of automatically
1630  * adjusting ...
1631  */
1632 module_param_named(no_sleep_autoadjust, iwlagn_mod_params.no_sleep_autoadjust,
1633                 bool, S_IRUGO);
1634 MODULE_PARM_DESC(no_sleep_autoadjust,
1635                  "don't automatically adjust sleep level "
1636                  "according to maximum network latency (default: true)");