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

   1 /******************************************************************************
   2  *
   3  * GPL LICENSE SUMMARY
   4  *
   5  * Copyright(c) 2008 - 2012 Intel Corporation. All rights reserved.
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of version 2 of the GNU General Public License as
   9  * published by the Free Software Foundation.
  10  *
  11  * This program is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
  19  * USA
  20  *
  21  * The full GNU General Public License is included in this distribution
  22  * in the file called LICENSE.GPL.
  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/sched.h>
  32 #include <linux/slab.h>
  33 #include <net/mac80211.h>
  34
  35 #include "iwl-eeprom.h"
  36 #include "iwl-debug.h"
  37 #include "iwl-core.h"
  38 #include "iwl-io.h"
  39 #include "iwl-power.h"
  40 #include "iwl-shared.h"
  41 #include "iwl-agn.h"
  42 #include "iwl-trans.h"
  43
  44 const u8 iwl_bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
  45
  46 static bool iwl_is_channel_extension(struct iwl_priv *priv,
  47                                      enum ieee80211_band band,
  48                                      u16 channel, u8 extension_chan_offset)
  49 {
  50         const struct iwl_channel_info *ch_info;
  51
  52         ch_info = iwl_get_channel_info(priv, band, channel);
  53         if (!is_channel_valid(ch_info))
  54                 return false;
  55
  56         if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE)
  57                 return !(ch_info->ht40_extension_channel &
  58                                         IEEE80211_CHAN_NO_HT40PLUS);
  59         else if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW)
  60                 return !(ch_info->ht40_extension_channel &
  61                                         IEEE80211_CHAN_NO_HT40MINUS);
  62
  63         return false;
  64 }
  65
  66 bool iwl_is_ht40_tx_allowed(struct iwl_priv *priv,
  67                             struct iwl_rxon_context *ctx,
  68                             struct ieee80211_sta_ht_cap *ht_cap)
  69 {
  70         if (!ctx->ht.enabled || !ctx->ht.is_40mhz)
  71                 return false;
  72
  73         /*
  74          * We do not check for IEEE80211_HT_CAP_SUP_WIDTH_20_40
  75          * the bit will not set if it is pure 40MHz case
  76          */
  77         if (ht_cap && !ht_cap->ht_supported)
  78                 return false;
  79
  80 #ifdef CONFIG_IWLWIFI_DEBUGFS
  81         if (priv->disable_ht40)
  82                 return false;
  83 #endif
  84
  85         return iwl_is_channel_extension(priv, priv->band,
  86                         le16_to_cpu(ctx->staging.channel),
  87                         ctx->ht.extension_chan_offset);
  88 }
  89
  90 static void _iwl_set_rxon_ht(struct iwl_priv *priv,
  91                              struct iwl_ht_config *ht_conf,
  92                              struct iwl_rxon_context *ctx)
  93 {
  94         struct iwl_rxon_cmd *rxon = &ctx->staging;
  95
  96         if (!ctx->ht.enabled) {
  97                 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
  98                         RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK |
  99                         RXON_FLG_HT40_PROT_MSK |
 100                         RXON_FLG_HT_PROT_MSK);
 101                 return;
 102         }
 103
 104         /* FIXME: if the definition of ht.protection changed, the "translation"
 105          * will be needed for rxon->flags
 106          */
 107         rxon->flags |= cpu_to_le32(ctx->ht.protection << RXON_FLG_HT_OPERATING_MODE_POS);
 108
 109         /* Set up channel bandwidth:
 110          * 20 MHz only, 20/40 mixed or pure 40 if ht40 ok */
 111         /* clear the HT channel mode before set the mode */
 112         rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
 113                          RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
 114         if (iwl_is_ht40_tx_allowed(priv, ctx, NULL)) {
 115                 /* pure ht40 */
 116                 if (ctx->ht.protection == IEEE80211_HT_OP_MODE_PROTECTION_20MHZ) {
 117                         rxon->flags |= RXON_FLG_CHANNEL_MODE_PURE_40;
 118                         /* Note: control channel is opposite of extension channel */
 119                         switch (ctx->ht.extension_chan_offset) {
 120                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 121                                 rxon->flags &= ~RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
 122                                 break;
 123                         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 124                                 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
 125                                 break;
 126                         }
 127                 } else {
 128                         /* Note: control channel is opposite of extension channel */
 129                         switch (ctx->ht.extension_chan_offset) {
 130                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 131                                 rxon->flags &= ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
 132                                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
 133                                 break;
 134                         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 135                                 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
 136                                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
 137                                 break;
 138                         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
 139                         default:
 140                                 /* channel location only valid if in Mixed mode */
 141                                 IWL_ERR(priv, "invalid extension channel offset\n");
 142                                 break;
 143                         }
 144                 }
 145         } else {
 146                 rxon->flags |= RXON_FLG_CHANNEL_MODE_LEGACY;
 147         }
 148
 149         iwlagn_set_rxon_chain(priv, ctx);
 150
 151         IWL_DEBUG_ASSOC(priv, "rxon flags 0x%X operation mode :0x%X "
 152                         "extension channel offset 0x%x\n",
 153                         le32_to_cpu(rxon->flags), ctx->ht.protection,
 154                         ctx->ht.extension_chan_offset);
 155 }
 156
 157 void iwl_set_rxon_ht(struct iwl_priv *priv, struct iwl_ht_config *ht_conf)
 158 {
 159         struct iwl_rxon_context *ctx;
 160
 161         for_each_context(priv, ctx)
 162                 _iwl_set_rxon_ht(priv, ht_conf, ctx);
 163 }
 164
 165 /**
 166  * iwl_set_rxon_channel - Set the band and channel values in staging RXON
 167  * @ch: requested channel as a pointer to struct ieee80211_channel
 168
 169  * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
 170  * in the staging RXON flag structure based on the ch->band
 171  */
 172 void iwl_set_rxon_channel(struct iwl_priv *priv, struct ieee80211_channel *ch,
 173                          struct iwl_rxon_context *ctx)
 174 {
 175         enum ieee80211_band band = ch->band;
 176         u16 channel = ch->hw_value;
 177
 178         if ((le16_to_cpu(ctx->staging.channel) == channel) &&
 179             (priv->band == band))
 180                 return;
 181
 182         ctx->staging.channel = cpu_to_le16(channel);
 183         if (band == IEEE80211_BAND_5GHZ)
 184                 ctx->staging.flags &= ~RXON_FLG_BAND_24G_MSK;
 185         else
 186                 ctx->staging.flags |= RXON_FLG_BAND_24G_MSK;
 187
 188         priv->band = band;
 189
 190         IWL_DEBUG_INFO(priv, "Staging channel set to %d [%d]\n", channel, band);
 191
 192 }
 193
 194 void iwl_set_flags_for_band(struct iwl_priv *priv,
 195                             struct iwl_rxon_context *ctx,
 196                             enum ieee80211_band band,
 197                             struct ieee80211_vif *vif)
 198 {
 199         if (band == IEEE80211_BAND_5GHZ) {
 200                 ctx->staging.flags &=
 201                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
 202                       | RXON_FLG_CCK_MSK);
 203                 ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
 204         } else {
 205                 /* Copied from iwl_post_associate() */
 206                 if (vif && vif->bss_conf.use_short_slot)
 207                         ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
 208                 else
 209                         ctx->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
 210
 211                 ctx->staging.flags |= RXON_FLG_BAND_24G_MSK;
 212                 ctx->staging.flags |= RXON_FLG_AUTO_DETECT_MSK;
 213                 ctx->staging.flags &= ~RXON_FLG_CCK_MSK;
 214         }
 215 }
 216
 217 /*
 218  * initialize rxon structure with default values from eeprom
 219  */
 220 void iwl_connection_init_rx_config(struct iwl_priv *priv,
 221                                    struct iwl_rxon_context *ctx)
 222 {
 223         const struct iwl_channel_info *ch_info;
 224
 225         memset(&ctx->staging, 0, sizeof(ctx->staging));
 226
 227         if (!ctx->vif) {
 228                 ctx->staging.dev_type = ctx->unused_devtype;
 229         } else switch (ctx->vif->type) {
 230         case NL80211_IFTYPE_AP:
 231                 ctx->staging.dev_type = ctx->ap_devtype;
 232                 break;
 233
 234         case NL80211_IFTYPE_STATION:
 235                 ctx->staging.dev_type = ctx->station_devtype;
 236                 ctx->staging.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
 237                 break;
 238
 239         case NL80211_IFTYPE_ADHOC:
 240                 ctx->staging.dev_type = ctx->ibss_devtype;
 241                 ctx->staging.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
 242                 ctx->staging.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
 243                                                   RXON_FILTER_ACCEPT_GRP_MSK;
 244                 break;
 245
 246         default:
 247                 IWL_ERR(priv, "Unsupported interface type %d\n",
 248                         ctx->vif->type);
 249                 break;
 250         }
 251
 252 #if 0
 253         /* TODO:  Figure out when short_preamble would be set and cache from
 254          * that */
 255         if (!hw_to_local(priv->hw)->short_preamble)
 256                 ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
 257         else
 258                 ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
 259 #endif
 260
 261         ch_info = iwl_get_channel_info(priv, priv->band,
 262                                        le16_to_cpu(ctx->active.channel));
 263
 264         if (!ch_info)
 265                 ch_info = &priv->channel_info[0];
 266
 267         ctx->staging.channel = cpu_to_le16(ch_info->channel);
 268         priv->band = ch_info->band;
 269
 270         iwl_set_flags_for_band(priv, ctx, priv->band, ctx->vif);
 271
 272         ctx->staging.ofdm_basic_rates =
 273             (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
 274         ctx->staging.cck_basic_rates =
 275             (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
 276
 277         /* clear both MIX and PURE40 mode flag */
 278         ctx->staging.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED |
 279                                         RXON_FLG_CHANNEL_MODE_PURE_40);
 280         if (ctx->vif)
 281                 memcpy(ctx->staging.node_addr, ctx->vif->addr, ETH_ALEN);
 282
 283         ctx->staging.ofdm_ht_single_stream_basic_rates = 0xff;
 284         ctx->staging.ofdm_ht_dual_stream_basic_rates = 0xff;
 285         ctx->staging.ofdm_ht_triple_stream_basic_rates = 0xff;
 286 }
 287
 288 void iwl_set_rate(struct iwl_priv *priv)
 289 {
 290         const struct ieee80211_supported_band *hw = NULL;
 291         struct ieee80211_rate *rate;
 292         struct iwl_rxon_context *ctx;
 293         int i;
 294
 295         hw = iwl_get_hw_mode(priv, priv->band);
 296         if (!hw) {
 297                 IWL_ERR(priv, "Failed to set rate: unable to get hw mode\n");
 298                 return;
 299         }
 300
 301         priv->active_rate = 0;
 302
 303         for (i = 0; i < hw->n_bitrates; i++) {
 304                 rate = &(hw->bitrates[i]);
 305                 if (rate->hw_value < IWL_RATE_COUNT_LEGACY)
 306                         priv->active_rate |= (1 << rate->hw_value);
 307         }
 308
 309         IWL_DEBUG_RATE(priv, "Set active_rate = %0x\n", priv->active_rate);
 310
 311         for_each_context(priv, ctx) {
 312                 ctx->staging.cck_basic_rates =
 313                     (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
 314
 315                 ctx->staging.ofdm_basic_rates =
 316                    (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
 317         }
 318 }
 319
 320 void iwl_chswitch_done(struct iwl_priv *priv, bool is_success)
 321 {
 322         /*
 323          * MULTI-FIXME
 324          * See iwlagn_mac_channel_switch.
 325          */
 326         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 327
 328         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 329                 return;
 330
 331         if (test_and_clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
 332                 ieee80211_chswitch_done(ctx->vif, is_success);
 333 }
 334
 335 #ifdef CONFIG_IWLWIFI_DEBUG
 336 void iwl_print_rx_config_cmd(struct iwl_priv *priv,
 337                              enum iwl_rxon_context_id ctxid)
 338 {
 339         struct iwl_rxon_context *ctx = &priv->contexts[ctxid];
 340         struct iwl_rxon_cmd *rxon = &ctx->staging;
 341
 342         IWL_DEBUG_RADIO(priv, "RX CONFIG:\n");
 343         iwl_print_hex_dump(priv, IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
 344         IWL_DEBUG_RADIO(priv, "u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
 345         IWL_DEBUG_RADIO(priv, "u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
 346         IWL_DEBUG_RADIO(priv, "u32 filter_flags: 0x%08x\n",
 347                         le32_to_cpu(rxon->filter_flags));
 348         IWL_DEBUG_RADIO(priv, "u8 dev_type: 0x%x\n", rxon->dev_type);
 349         IWL_DEBUG_RADIO(priv, "u8 ofdm_basic_rates: 0x%02x\n",
 350                         rxon->ofdm_basic_rates);
 351         IWL_DEBUG_RADIO(priv, "u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
 352         IWL_DEBUG_RADIO(priv, "u8[6] node_addr: %pM\n", rxon->node_addr);
 353         IWL_DEBUG_RADIO(priv, "u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
 354         IWL_DEBUG_RADIO(priv, "u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
 355 }
 356 #endif
 357
 358 void iwlagn_fw_error(struct iwl_priv *priv, bool ondemand)
 359 {
 360         unsigned int reload_msec;
 361         unsigned long reload_jiffies;
 362
 363 #ifdef CONFIG_IWLWIFI_DEBUG
 364         if (iwl_have_debug_level(IWL_DL_FW_ERRORS))
 365                 iwl_print_rx_config_cmd(priv, IWL_RXON_CTX_BSS);
 366 #endif
 367
 368         /* uCode is no longer loaded. */
 369         priv->ucode_loaded = false;
 370
 371         /* Set the FW error flag -- cleared on iwl_down */
 372         set_bit(STATUS_FW_ERROR, &priv->status);
 373
 374         /* Cancel currently queued command. */
 375         clear_bit(STATUS_HCMD_ACTIVE, &priv->shrd->status);
 376
 377         iwl_abort_notification_waits(&priv->notif_wait);
 378
 379         /* Keep the restart process from trying to send host
 380          * commands by clearing the ready bit */
 381         clear_bit(STATUS_READY, &priv->status);
 382
 383         wake_up(&trans(priv)->wait_command_queue);
 384
 385         if (!ondemand) {
 386                 /*
 387                  * If firmware keep reloading, then it indicate something
 388                  * serious wrong and firmware having problem to recover
 389                  * from it. Instead of keep trying which will fill the syslog
 390                  * and hang the system, let's just stop it
 391                  */
 392                 reload_jiffies = jiffies;
 393                 reload_msec = jiffies_to_msecs((long) reload_jiffies -
 394                                         (long) priv->reload_jiffies);
 395                 priv->reload_jiffies = reload_jiffies;
 396                 if (reload_msec <= IWL_MIN_RELOAD_DURATION) {
 397                         priv->reload_count++;
 398                         if (priv->reload_count >= IWL_MAX_CONTINUE_RELOAD_CNT) {
 399                                 IWL_ERR(priv, "BUG_ON, Stop restarting\n");
 400                                 return;
 401                         }
 402                 } else
 403                         priv->reload_count = 0;
 404         }
 405
 406         if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
 407                 if (iwlagn_mod_params.restart_fw) {
 408                         IWL_DEBUG_FW_ERRORS(priv,
 409                                   "Restarting adapter due to uCode error.\n");
 410                         queue_work(priv->workqueue, &priv->restart);
 411                 } else
 412                         IWL_DEBUG_FW_ERRORS(priv,
 413                                   "Detected FW error, but not restarting\n");
 414         }
 415 }
 416
 417 int iwl_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force)
 418 {
 419         int ret;
 420         s8 prev_tx_power;
 421         bool defer;
 422         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 423
 424         lockdep_assert_held(&priv->mutex);
 425
 426         if (priv->tx_power_user_lmt == tx_power && !force)
 427                 return 0;
 428
 429         if (tx_power < IWLAGN_TX_POWER_TARGET_POWER_MIN) {
 430                 IWL_WARN(priv,
 431                          "Requested user TXPOWER %d below lower limit %d.\n",
 432                          tx_power,
 433                          IWLAGN_TX_POWER_TARGET_POWER_MIN);
 434                 return -EINVAL;
 435         }
 436
 437         if (tx_power > priv->tx_power_device_lmt) {
 438                 IWL_WARN(priv,
 439                         "Requested user TXPOWER %d above upper limit %d.\n",
 440                          tx_power, priv->tx_power_device_lmt);
 441                 return -EINVAL;
 442         }
 443
 444         if (!iwl_is_ready_rf(priv))
 445                 return -EIO;
 446
 447         /* scan complete and commit_rxon use tx_power_next value,
 448          * it always need to be updated for newest request */
 449         priv->tx_power_next = tx_power;
 450
 451         /* do not set tx power when scanning or channel changing */
 452         defer = test_bit(STATUS_SCANNING, &priv->status) ||
 453                 memcmp(&ctx->active, &ctx->staging, sizeof(ctx->staging));
 454         if (defer && !force) {
 455                 IWL_DEBUG_INFO(priv, "Deferring tx power set\n");
 456                 return 0;
 457         }
 458
 459         prev_tx_power = priv->tx_power_user_lmt;
 460         priv->tx_power_user_lmt = tx_power;
 461
 462         ret = iwlagn_send_tx_power(priv);
 463
 464         /* if fail to set tx_power, restore the orig. tx power */
 465         if (ret) {
 466                 priv->tx_power_user_lmt = prev_tx_power;
 467                 priv->tx_power_next = prev_tx_power;
 468         }
 469         return ret;
 470 }
 471
 472 void iwl_send_bt_config(struct iwl_priv *priv)
 473 {
 474         struct iwl_bt_cmd bt_cmd = {
 475                 .lead_time = BT_LEAD_TIME_DEF,
 476                 .max_kill = BT_MAX_KILL_DEF,
 477                 .kill_ack_mask = 0,
 478                 .kill_cts_mask = 0,
 479         };
 480
 481         if (!iwlagn_mod_params.bt_coex_active)
 482                 bt_cmd.flags = BT_COEX_DISABLE;
 483         else
 484                 bt_cmd.flags = BT_COEX_ENABLE;
 485
 486         priv->bt_enable_flag = bt_cmd.flags;
 487         IWL_DEBUG_INFO(priv, "BT coex %s\n",
 488                 (bt_cmd.flags == BT_COEX_DISABLE) ? "disable" : "active");
 489
 490         if (iwl_dvm_send_cmd_pdu(priv, REPLY_BT_CONFIG,
 491                              CMD_SYNC, sizeof(struct iwl_bt_cmd), &bt_cmd))
 492                 IWL_ERR(priv, "failed to send BT Coex Config\n");
 493 }
 494
 495 int iwl_send_statistics_request(struct iwl_priv *priv, u8 flags, bool clear)
 496 {
 497         struct iwl_statistics_cmd statistics_cmd = {
 498                 .configuration_flags =
 499                         clear ? IWL_STATS_CONF_CLEAR_STATS : 0,
 500         };
 501
 502         if (flags & CMD_ASYNC)
 503                 return iwl_dvm_send_cmd_pdu(priv, REPLY_STATISTICS_CMD,
 504                                               CMD_ASYNC,
 505                                                sizeof(struct iwl_statistics_cmd),
 506                                                &statistics_cmd);
 507         else
 508                 return iwl_dvm_send_cmd_pdu(priv, REPLY_STATISTICS_CMD,
 509                                         CMD_SYNC,
 510                                         sizeof(struct iwl_statistics_cmd),
 511                                         &statistics_cmd);
 512 }
 513
 514
 515
 516
 517 #ifdef CONFIG_IWLWIFI_DEBUGFS
 518
 519 #define IWL_TRAFFIC_DUMP_SIZE   (IWL_TRAFFIC_ENTRY_SIZE * IWL_TRAFFIC_ENTRIES)
 520
 521 void iwl_reset_traffic_log(struct iwl_priv *priv)
 522 {
 523         priv->tx_traffic_idx = 0;
 524         priv->rx_traffic_idx = 0;
 525         if (priv->tx_traffic)
 526                 memset(priv->tx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
 527         if (priv->rx_traffic)
 528                 memset(priv->rx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
 529 }
 530
 531 int iwl_alloc_traffic_mem(struct iwl_priv *priv)
 532 {
 533         u32 traffic_size = IWL_TRAFFIC_DUMP_SIZE;
 534
 535         if (iwl_have_debug_level(IWL_DL_TX)) {
 536                 if (!priv->tx_traffic) {
 537                         priv->tx_traffic =
 538                                 kzalloc(traffic_size, GFP_KERNEL);
 539                         if (!priv->tx_traffic)
 540                                 return -ENOMEM;
 541                 }
 542         }
 543         if (iwl_have_debug_level(IWL_DL_RX)) {
 544                 if (!priv->rx_traffic) {
 545                         priv->rx_traffic =
 546                                 kzalloc(traffic_size, GFP_KERNEL);
 547                         if (!priv->rx_traffic)
 548                                 return -ENOMEM;
 549                 }
 550         }
 551         iwl_reset_traffic_log(priv);
 552         return 0;
 553 }
 554
 555 void iwl_free_traffic_mem(struct iwl_priv *priv)
 556 {
 557         kfree(priv->tx_traffic);
 558         priv->tx_traffic = NULL;
 559
 560         kfree(priv->rx_traffic);
 561         priv->rx_traffic = NULL;
 562 }
 563
 564 void iwl_dbg_log_tx_data_frame(struct iwl_priv *priv,
 565                       u16 length, struct ieee80211_hdr *header)
 566 {
 567         __le16 fc;
 568         u16 len;
 569
 570         if (likely(!iwl_have_debug_level(IWL_DL_TX)))
 571                 return;
 572
 573         if (!priv->tx_traffic)
 574                 return;
 575
 576         fc = header->frame_control;
 577         if (ieee80211_is_data(fc)) {
 578                 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
 579                        ? IWL_TRAFFIC_ENTRY_SIZE : length;
 580                 memcpy((priv->tx_traffic +
 581                        (priv->tx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
 582                        header, len);
 583                 priv->tx_traffic_idx =
 584                         (priv->tx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
 585         }
 586 }
 587
 588 void iwl_dbg_log_rx_data_frame(struct iwl_priv *priv,
 589                       u16 length, struct ieee80211_hdr *header)
 590 {
 591         __le16 fc;
 592         u16 len;
 593
 594         if (likely(!iwl_have_debug_level(IWL_DL_RX)))
 595                 return;
 596
 597         if (!priv->rx_traffic)
 598                 return;
 599
 600         fc = header->frame_control;
 601         if (ieee80211_is_data(fc)) {
 602                 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
 603                        ? IWL_TRAFFIC_ENTRY_SIZE : length;
 604                 memcpy((priv->rx_traffic +
 605                        (priv->rx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
 606                        header, len);
 607                 priv->rx_traffic_idx =
 608                         (priv->rx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
 609         }
 610 }
 611
 612 const char *get_mgmt_string(int cmd)
 613 {
 614         switch (cmd) {
 615                 IWL_CMD(MANAGEMENT_ASSOC_REQ);
 616                 IWL_CMD(MANAGEMENT_ASSOC_RESP);
 617                 IWL_CMD(MANAGEMENT_REASSOC_REQ);
 618                 IWL_CMD(MANAGEMENT_REASSOC_RESP);
 619                 IWL_CMD(MANAGEMENT_PROBE_REQ);
 620                 IWL_CMD(MANAGEMENT_PROBE_RESP);
 621                 IWL_CMD(MANAGEMENT_BEACON);
 622                 IWL_CMD(MANAGEMENT_ATIM);
 623                 IWL_CMD(MANAGEMENT_DISASSOC);
 624                 IWL_CMD(MANAGEMENT_AUTH);
 625                 IWL_CMD(MANAGEMENT_DEAUTH);
 626                 IWL_CMD(MANAGEMENT_ACTION);
 627         default:
 628                 return "UNKNOWN";
 629
 630         }
 631 }
 632
 633 const char *get_ctrl_string(int cmd)
 634 {
 635         switch (cmd) {
 636                 IWL_CMD(CONTROL_BACK_REQ);
 637                 IWL_CMD(CONTROL_BACK);
 638                 IWL_CMD(CONTROL_PSPOLL);
 639                 IWL_CMD(CONTROL_RTS);
 640                 IWL_CMD(CONTROL_CTS);
 641                 IWL_CMD(CONTROL_ACK);
 642                 IWL_CMD(CONTROL_CFEND);
 643                 IWL_CMD(CONTROL_CFENDACK);
 644         default:
 645                 return "UNKNOWN";
 646
 647         }
 648 }
 649
 650 void iwl_clear_traffic_stats(struct iwl_priv *priv)
 651 {
 652         memset(&priv->tx_stats, 0, sizeof(struct traffic_stats));
 653         memset(&priv->rx_stats, 0, sizeof(struct traffic_stats));
 654 }
 655
 656 /*
 657  * if CONFIG_IWLWIFI_DEBUGFS defined, iwl_update_stats function will
 658  * record all the MGMT, CTRL and DATA pkt for both TX and Rx pass.
 659  * Use debugFs to display the rx/rx_statistics
 660  * if CONFIG_IWLWIFI_DEBUGFS not being defined, then no MGMT and CTRL
 661  * information will be recorded, but DATA pkt still will be recorded
 662  * for the reason of iwl_led.c need to control the led blinking based on
 663  * number of tx and rx data.
 664  *
 665  */
 666 void iwl_update_stats(struct iwl_priv *priv, bool is_tx, __le16 fc, u16 len)
 667 {
 668         struct traffic_stats    *stats;
 669
 670         if (is_tx)
 671                 stats = &priv->tx_stats;
 672         else
 673                 stats = &priv->rx_stats;
 674
 675         if (ieee80211_is_mgmt(fc)) {
 676                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
 677                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
 678                         stats->mgmt[MANAGEMENT_ASSOC_REQ]++;
 679                         break;
 680                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP):
 681                         stats->mgmt[MANAGEMENT_ASSOC_RESP]++;
 682                         break;
 683                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
 684                         stats->mgmt[MANAGEMENT_REASSOC_REQ]++;
 685                         break;
 686                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP):
 687                         stats->mgmt[MANAGEMENT_REASSOC_RESP]++;
 688                         break;
 689                 case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ):
 690                         stats->mgmt[MANAGEMENT_PROBE_REQ]++;
 691                         break;
 692                 case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP):
 693                         stats->mgmt[MANAGEMENT_PROBE_RESP]++;
 694                         break;
 695                 case cpu_to_le16(IEEE80211_STYPE_BEACON):
 696                         stats->mgmt[MANAGEMENT_BEACON]++;
 697                         break;
 698                 case cpu_to_le16(IEEE80211_STYPE_ATIM):
 699                         stats->mgmt[MANAGEMENT_ATIM]++;
 700                         break;
 701                 case cpu_to_le16(IEEE80211_STYPE_DISASSOC):
 702                         stats->mgmt[MANAGEMENT_DISASSOC]++;
 703                         break;
 704                 case cpu_to_le16(IEEE80211_STYPE_AUTH):
 705                         stats->mgmt[MANAGEMENT_AUTH]++;
 706                         break;
 707                 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
 708                         stats->mgmt[MANAGEMENT_DEAUTH]++;
 709                         break;
 710                 case cpu_to_le16(IEEE80211_STYPE_ACTION):
 711                         stats->mgmt[MANAGEMENT_ACTION]++;
 712                         break;
 713                 }
 714         } else if (ieee80211_is_ctl(fc)) {
 715                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
 716                 case cpu_to_le16(IEEE80211_STYPE_BACK_REQ):
 717                         stats->ctrl[CONTROL_BACK_REQ]++;
 718                         break;
 719                 case cpu_to_le16(IEEE80211_STYPE_BACK):
 720                         stats->ctrl[CONTROL_BACK]++;
 721                         break;
 722                 case cpu_to_le16(IEEE80211_STYPE_PSPOLL):
 723                         stats->ctrl[CONTROL_PSPOLL]++;
 724                         break;
 725                 case cpu_to_le16(IEEE80211_STYPE_RTS):
 726                         stats->ctrl[CONTROL_RTS]++;
 727                         break;
 728                 case cpu_to_le16(IEEE80211_STYPE_CTS):
 729                         stats->ctrl[CONTROL_CTS]++;
 730                         break;
 731                 case cpu_to_le16(IEEE80211_STYPE_ACK):
 732                         stats->ctrl[CONTROL_ACK]++;
 733                         break;
 734                 case cpu_to_le16(IEEE80211_STYPE_CFEND):
 735                         stats->ctrl[CONTROL_CFEND]++;
 736                         break;
 737                 case cpu_to_le16(IEEE80211_STYPE_CFENDACK):
 738                         stats->ctrl[CONTROL_CFENDACK]++;
 739                         break;
 740                 }
 741         } else {
 742                 /* data */
 743                 stats->data_cnt++;
 744                 stats->data_bytes += len;
 745         }
 746 }
 747 #endif
 748
 749 static void iwl_force_rf_reset(struct iwl_priv *priv)
 750 {
 751         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 752                 return;
 753
 754         if (!iwl_is_any_associated(priv)) {
 755                 IWL_DEBUG_SCAN(priv, "force reset rejected: not associated\n");
 756                 return;
 757         }
 758         /*
 759          * There is no easy and better way to force reset the radio,
 760          * the only known method is switching channel which will force to
 761          * reset and tune the radio.
 762          * Use internal short scan (single channel) operation to should
 763          * achieve this objective.
 764          * Driver should reset the radio when number of consecutive missed
 765          * beacon, or any other uCode error condition detected.
 766          */
 767         IWL_DEBUG_INFO(priv, "perform radio reset.\n");
 768         iwl_internal_short_hw_scan(priv);
 769 }
 770
 771
 772 int iwl_force_reset(struct iwl_priv *priv, int mode, bool external)
 773 {
 774         struct iwl_force_reset *force_reset;
 775
 776         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 777                 return -EINVAL;
 778
 779         if (mode >= IWL_MAX_FORCE_RESET) {
 780                 IWL_DEBUG_INFO(priv, "invalid reset request.\n");
 781                 return -EINVAL;
 782         }
 783         force_reset = &priv->force_reset[mode];
 784         force_reset->reset_request_count++;
 785         if (!external) {
 786                 if (force_reset->last_force_reset_jiffies &&
 787                     time_after(force_reset->last_force_reset_jiffies +
 788                     force_reset->reset_duration, jiffies)) {
 789                         IWL_DEBUG_INFO(priv, "force reset rejected\n");
 790                         force_reset->reset_reject_count++;
 791                         return -EAGAIN;
 792                 }
 793         }
 794         force_reset->reset_success_count++;
 795         force_reset->last_force_reset_jiffies = jiffies;
 796         IWL_DEBUG_INFO(priv, "perform force reset (%d)\n", mode);
 797         switch (mode) {
 798         case IWL_RF_RESET:
 799                 iwl_force_rf_reset(priv);
 800                 break;
 801         case IWL_FW_RESET:
 802                 /*
 803                  * if the request is from external(ex: debugfs),
 804                  * then always perform the request in regardless the module
 805                  * parameter setting
 806                  * if the request is from internal (uCode error or driver
 807                  * detect failure), then fw_restart module parameter
 808                  * need to be check before performing firmware reload
 809                  */
 810                 if (!external && !iwlagn_mod_params.restart_fw) {
 811                         IWL_DEBUG_INFO(priv, "Cancel firmware reload based on "
 812                                        "module parameter setting\n");
 813                         break;
 814                 }
 815                 IWL_ERR(priv, "On demand firmware reload\n");
 816                 iwlagn_fw_error(priv, true);
 817                 break;
 818         }
 819         return 0;
 820 }
 821
 822
 823 int iwl_cmd_echo_test(struct iwl_priv *priv)
 824 {
 825         int ret;
 826         struct iwl_host_cmd cmd = {
 827                 .id = REPLY_ECHO,
 828                 .len = { 0 },
 829                 .flags = CMD_SYNC,
 830         };
 831
 832         ret = iwl_dvm_send_cmd(priv, &cmd);
 833         if (ret)
 834                 IWL_ERR(priv, "echo testing fail: 0X%x\n", ret);
 835         else
 836                 IWL_DEBUG_INFO(priv, "echo testing pass\n");
 837         return ret;
 838 }
 839
 840 static inline int iwl_check_stuck_queue(struct iwl_priv *priv, int txq)
 841 {
 842         if (iwl_trans_check_stuck_queue(trans(priv), txq)) {
 843                 int ret;
 844                 ret = iwl_force_reset(priv, IWL_FW_RESET, false);
 845                 return (ret == -EAGAIN) ? 0 : 1;
 846         }
 847         return 0;
 848 }
 849
 850 /*
 851  * Making watchdog tick be a quarter of timeout assure we will
 852  * discover the queue hung between timeout and 1.25*timeout
 853  */
 854 #define IWL_WD_TICK(timeout) ((timeout) / 4)
 855
 856 /*
 857  * Watchdog timer callback, we check each tx queue for stuck, if if hung
 858  * we reset the firmware. If everything is fine just rearm the timer.
 859  */
 860 void iwl_bg_watchdog(unsigned long data)
 861 {
 862         struct iwl_priv *priv = (struct iwl_priv *)data;
 863         int cnt;
 864         unsigned long timeout;
 865
 866         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 867                 return;
 868
 869         if (iwl_is_rfkill(priv))
 870                 return;
 871
 872         timeout = hw_params(priv).wd_timeout;
 873         if (timeout == 0)
 874                 return;
 875
 876         /* monitor and check for stuck queues */
 877         for (cnt = 0; cnt < cfg(priv)->base_params->num_of_queues; cnt++)
 878                 if (iwl_check_stuck_queue(priv, cnt))
 879                         return;
 880
 881         mod_timer(&priv->watchdog, jiffies +
 882                   msecs_to_jiffies(IWL_WD_TICK(timeout)));
 883 }
 884
 885 void iwl_setup_watchdog(struct iwl_priv *priv)
 886 {
 887         unsigned int timeout = hw_params(priv).wd_timeout;
 888
 889         if (!iwlagn_mod_params.wd_disable) {
 890                 /* use system default */
 891                 if (timeout && !cfg(priv)->base_params->wd_disable)
 892                         mod_timer(&priv->watchdog,
 893                                 jiffies +
 894                                 msecs_to_jiffies(IWL_WD_TICK(timeout)));
 895                 else
 896                         del_timer(&priv->watchdog);
 897         } else {
 898                 /* module parameter overwrite default configuration */
 899                 if (timeout && iwlagn_mod_params.wd_disable == 2)
 900                         mod_timer(&priv->watchdog,
 901                                 jiffies +
 902                                 msecs_to_jiffies(IWL_WD_TICK(timeout)));
 903                 else
 904                         del_timer(&priv->watchdog);
 905         }
 906 }
 907
 908 /**
 909  * iwl_beacon_time_mask_low - mask of lower 32 bit of beacon time
 910  * @priv -- pointer to iwl_priv data structure
 911  * @tsf_bits -- number of bits need to shift for masking)
 912  */
 913 static inline u32 iwl_beacon_time_mask_low(struct iwl_priv *priv,
 914                                            u16 tsf_bits)
 915 {
 916         return (1 << tsf_bits) - 1;
 917 }
 918
 919 /**
 920  * iwl_beacon_time_mask_high - mask of higher 32 bit of beacon time
 921  * @priv -- pointer to iwl_priv data structure
 922  * @tsf_bits -- number of bits need to shift for masking)
 923  */
 924 static inline u32 iwl_beacon_time_mask_high(struct iwl_priv *priv,
 925                                             u16 tsf_bits)
 926 {
 927         return ((1 << (32 - tsf_bits)) - 1) << tsf_bits;
 928 }
 929
 930 /*
 931  * extended beacon time format
 932  * time in usec will be changed into a 32-bit value in extended:internal format
 933  * the extended part is the beacon counts
 934  * the internal part is the time in usec within one beacon interval
 935  */
 936 u32 iwl_usecs_to_beacons(struct iwl_priv *priv, u32 usec, u32 beacon_interval)
 937 {
 938         u32 quot;
 939         u32 rem;
 940         u32 interval = beacon_interval * TIME_UNIT;
 941
 942         if (!interval || !usec)
 943                 return 0;
 944
 945         quot = (usec / interval) &
 946                 (iwl_beacon_time_mask_high(priv, IWLAGN_EXT_BEACON_TIME_POS) >>
 947                 IWLAGN_EXT_BEACON_TIME_POS);
 948         rem = (usec % interval) & iwl_beacon_time_mask_low(priv,
 949                                    IWLAGN_EXT_BEACON_TIME_POS);
 950
 951         return (quot << IWLAGN_EXT_BEACON_TIME_POS) + rem;
 952 }
 953
 954 /* base is usually what we get from ucode with each received frame,
 955  * the same as HW timer counter counting down
 956  */
 957 __le32 iwl_add_beacon_time(struct iwl_priv *priv, u32 base,
 958                            u32 addon, u32 beacon_interval)
 959 {
 960         u32 base_low = base & iwl_beacon_time_mask_low(priv,
 961                                 IWLAGN_EXT_BEACON_TIME_POS);
 962         u32 addon_low = addon & iwl_beacon_time_mask_low(priv,
 963                                 IWLAGN_EXT_BEACON_TIME_POS);
 964         u32 interval = beacon_interval * TIME_UNIT;
 965         u32 res = (base & iwl_beacon_time_mask_high(priv,
 966                                 IWLAGN_EXT_BEACON_TIME_POS)) +
 967                                 (addon & iwl_beacon_time_mask_high(priv,
 968                                 IWLAGN_EXT_BEACON_TIME_POS));
 969
 970         if (base_low > addon_low)
 971                 res += base_low - addon_low;
 972         else if (base_low < addon_low) {
 973                 res += interval + base_low - addon_low;
 974                 res += (1 << IWLAGN_EXT_BEACON_TIME_POS);
 975         } else
 976                 res += (1 << IWLAGN_EXT_BEACON_TIME_POS);
 977
 978         return cpu_to_le32(res);
 979 }
 980
 981 void iwl_set_hw_rfkill_state(struct iwl_op_mode *op_mode, bool state)
 982 {
 983         struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
 984
 985         if (state)
 986                 set_bit(STATUS_RF_KILL_HW, &priv->status);
 987         else
 988                 clear_bit(STATUS_RF_KILL_HW, &priv->status);
 989
 990         wiphy_rfkill_set_hw_state(priv->hw->wiphy, state);
 991 }
 992
 993 void iwl_free_skb(struct iwl_op_mode *op_mode, struct sk_buff *skb)
 994 {
 995         struct ieee80211_tx_info *info;
 996
 997         info = IEEE80211_SKB_CB(skb);
 998         kmem_cache_free(iwl_tx_cmd_pool, (info->driver_data[1]));
 999         dev_kfree_skb_any(skb);
1000 }