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

   1 /******************************************************************************
   2  *
   3  * GPL LICENSE SUMMARY
   4  *
   5  * Copyright(c) 2008 - 2010 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/etherdevice.h>
  32 #include <linux/sched.h>
  33 #include <linux/slab.h>
  34 #include <net/mac80211.h>
  35
  36 #include "iwl-eeprom.h"
  37 #include "iwl-dev.h" /* FIXME: remove */
  38 #include "iwl-debug.h"
  39 #include "iwl-core.h"
  40 #include "iwl-io.h"
  41 #include "iwl-power.h"
  42 #include "iwl-sta.h"
  43 #include "iwl-helpers.h"
  44
  45
  46 MODULE_DESCRIPTION("iwl core");
  47 MODULE_VERSION(IWLWIFI_VERSION);
  48 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
  49 MODULE_LICENSE("GPL");
  50
  51 /*
  52  * set bt_coex_active to true, uCode will do kill/defer
  53  * every time the priority line is asserted (BT is sending signals on the
  54  * priority line in the PCIx).
  55  * set bt_coex_active to false, uCode will ignore the BT activity and
  56  * perform the normal operation
  57  *
  58  * User might experience transmit issue on some platform due to WiFi/BT
  59  * co-exist problem. The possible behaviors are:
  60  *   Able to scan and finding all the available AP
  61  *   Not able to associate with any AP
  62  * On those platforms, WiFi communication can be restored by set
  63  * "bt_coex_active" module parameter to "false"
  64  *
  65  * default: bt_coex_active = true (BT_COEX_ENABLE)
  66  */
  67 static bool bt_coex_active = true;
  68 module_param(bt_coex_active, bool, S_IRUGO);
  69 MODULE_PARM_DESC(bt_coex_active, "enable wifi/bluetooth co-exist");
  70
  71 static struct iwl_wimax_coex_event_entry cu_priorities[COEX_NUM_OF_EVENTS] = {
  72         {COEX_CU_UNASSOC_IDLE_RP, COEX_CU_UNASSOC_IDLE_WP,
  73          0, COEX_UNASSOC_IDLE_FLAGS},
  74         {COEX_CU_UNASSOC_MANUAL_SCAN_RP, COEX_CU_UNASSOC_MANUAL_SCAN_WP,
  75          0, COEX_UNASSOC_MANUAL_SCAN_FLAGS},
  76         {COEX_CU_UNASSOC_AUTO_SCAN_RP, COEX_CU_UNASSOC_AUTO_SCAN_WP,
  77          0, COEX_UNASSOC_AUTO_SCAN_FLAGS},
  78         {COEX_CU_CALIBRATION_RP, COEX_CU_CALIBRATION_WP,
  79          0, COEX_CALIBRATION_FLAGS},
  80         {COEX_CU_PERIODIC_CALIBRATION_RP, COEX_CU_PERIODIC_CALIBRATION_WP,
  81          0, COEX_PERIODIC_CALIBRATION_FLAGS},
  82         {COEX_CU_CONNECTION_ESTAB_RP, COEX_CU_CONNECTION_ESTAB_WP,
  83          0, COEX_CONNECTION_ESTAB_FLAGS},
  84         {COEX_CU_ASSOCIATED_IDLE_RP, COEX_CU_ASSOCIATED_IDLE_WP,
  85          0, COEX_ASSOCIATED_IDLE_FLAGS},
  86         {COEX_CU_ASSOC_MANUAL_SCAN_RP, COEX_CU_ASSOC_MANUAL_SCAN_WP,
  87          0, COEX_ASSOC_MANUAL_SCAN_FLAGS},
  88         {COEX_CU_ASSOC_AUTO_SCAN_RP, COEX_CU_ASSOC_AUTO_SCAN_WP,
  89          0, COEX_ASSOC_AUTO_SCAN_FLAGS},
  90         {COEX_CU_ASSOC_ACTIVE_LEVEL_RP, COEX_CU_ASSOC_ACTIVE_LEVEL_WP,
  91          0, COEX_ASSOC_ACTIVE_LEVEL_FLAGS},
  92         {COEX_CU_RF_ON_RP, COEX_CU_RF_ON_WP, 0, COEX_CU_RF_ON_FLAGS},
  93         {COEX_CU_RF_OFF_RP, COEX_CU_RF_OFF_WP, 0, COEX_RF_OFF_FLAGS},
  94         {COEX_CU_STAND_ALONE_DEBUG_RP, COEX_CU_STAND_ALONE_DEBUG_WP,
  95          0, COEX_STAND_ALONE_DEBUG_FLAGS},
  96         {COEX_CU_IPAN_ASSOC_LEVEL_RP, COEX_CU_IPAN_ASSOC_LEVEL_WP,
  97          0, COEX_IPAN_ASSOC_LEVEL_FLAGS},
  98         {COEX_CU_RSRVD1_RP, COEX_CU_RSRVD1_WP, 0, COEX_RSRVD1_FLAGS},
  99         {COEX_CU_RSRVD2_RP, COEX_CU_RSRVD2_WP, 0, COEX_RSRVD2_FLAGS}
 100 };
 101
 102 #define IWL_DECLARE_RATE_INFO(r, s, ip, in, rp, rn, pp, np)    \
 103         [IWL_RATE_##r##M_INDEX] = { IWL_RATE_##r##M_PLCP,      \
 104                                     IWL_RATE_SISO_##s##M_PLCP, \
 105                                     IWL_RATE_MIMO2_##s##M_PLCP,\
 106                                     IWL_RATE_MIMO3_##s##M_PLCP,\
 107                                     IWL_RATE_##r##M_IEEE,      \
 108                                     IWL_RATE_##ip##M_INDEX,    \
 109                                     IWL_RATE_##in##M_INDEX,    \
 110                                     IWL_RATE_##rp##M_INDEX,    \
 111                                     IWL_RATE_##rn##M_INDEX,    \
 112                                     IWL_RATE_##pp##M_INDEX,    \
 113                                     IWL_RATE_##np##M_INDEX }
 114
 115 u32 iwl_debug_level;
 116 EXPORT_SYMBOL(iwl_debug_level);
 117
 118 /*
 119  * Parameter order:
 120  *   rate, ht rate, prev rate, next rate, prev tgg rate, next tgg rate
 121  *
 122  * If there isn't a valid next or previous rate then INV is used which
 123  * maps to IWL_RATE_INVALID
 124  *
 125  */
 126 const struct iwl_rate_info iwl_rates[IWL_RATE_COUNT] = {
 127         IWL_DECLARE_RATE_INFO(1, INV, INV, 2, INV, 2, INV, 2),    /*  1mbps */
 128         IWL_DECLARE_RATE_INFO(2, INV, 1, 5, 1, 5, 1, 5),          /*  2mbps */
 129         IWL_DECLARE_RATE_INFO(5, INV, 2, 6, 2, 11, 2, 11),        /*5.5mbps */
 130         IWL_DECLARE_RATE_INFO(11, INV, 9, 12, 9, 12, 5, 18),      /* 11mbps */
 131         IWL_DECLARE_RATE_INFO(6, 6, 5, 9, 5, 11, 5, 11),        /*  6mbps */
 132         IWL_DECLARE_RATE_INFO(9, 6, 6, 11, 6, 11, 5, 11),       /*  9mbps */
 133         IWL_DECLARE_RATE_INFO(12, 12, 11, 18, 11, 18, 11, 18),   /* 12mbps */
 134         IWL_DECLARE_RATE_INFO(18, 18, 12, 24, 12, 24, 11, 24),   /* 18mbps */
 135         IWL_DECLARE_RATE_INFO(24, 24, 18, 36, 18, 36, 18, 36),   /* 24mbps */
 136         IWL_DECLARE_RATE_INFO(36, 36, 24, 48, 24, 48, 24, 48),   /* 36mbps */
 137         IWL_DECLARE_RATE_INFO(48, 48, 36, 54, 36, 54, 36, 54),   /* 48mbps */
 138         IWL_DECLARE_RATE_INFO(54, 54, 48, INV, 48, INV, 48, INV),/* 54mbps */
 139         IWL_DECLARE_RATE_INFO(60, 60, 48, INV, 48, INV, 48, INV),/* 60mbps */
 140         /* FIXME:RS:          ^^    should be INV (legacy) */
 141 };
 142 EXPORT_SYMBOL(iwl_rates);
 143
 144 int iwl_hwrate_to_plcp_idx(u32 rate_n_flags)
 145 {
 146         int idx = 0;
 147
 148         /* HT rate format */
 149         if (rate_n_flags & RATE_MCS_HT_MSK) {
 150                 idx = (rate_n_flags & 0xff);
 151
 152                 if (idx >= IWL_RATE_MIMO3_6M_PLCP)
 153                         idx = idx - IWL_RATE_MIMO3_6M_PLCP;
 154                 else if (idx >= IWL_RATE_MIMO2_6M_PLCP)
 155                         idx = idx - IWL_RATE_MIMO2_6M_PLCP;
 156
 157                 idx += IWL_FIRST_OFDM_RATE;
 158                 /* skip 9M not supported in ht*/
 159                 if (idx >= IWL_RATE_9M_INDEX)
 160                         idx += 1;
 161                 if ((idx >= IWL_FIRST_OFDM_RATE) && (idx <= IWL_LAST_OFDM_RATE))
 162                         return idx;
 163
 164         /* legacy rate format, search for match in table */
 165         } else {
 166                 for (idx = 0; idx < ARRAY_SIZE(iwl_rates); idx++)
 167                         if (iwl_rates[idx].plcp == (rate_n_flags & 0xFF))
 168                                 return idx;
 169         }
 170
 171         return -1;
 172 }
 173 EXPORT_SYMBOL(iwl_hwrate_to_plcp_idx);
 174
 175 u8 iwl_toggle_tx_ant(struct iwl_priv *priv, u8 ant)
 176 {
 177         int i;
 178         u8 ind = ant;
 179         for (i = 0; i < RATE_ANT_NUM - 1; i++) {
 180                 ind = (ind + 1) < RATE_ANT_NUM ?  ind + 1 : 0;
 181                 if (priv->hw_params.valid_tx_ant & BIT(ind))
 182                         return ind;
 183         }
 184         return ant;
 185 }
 186 EXPORT_SYMBOL(iwl_toggle_tx_ant);
 187
 188 const u8 iwl_bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
 189 EXPORT_SYMBOL(iwl_bcast_addr);
 190
 191
 192 /* This function both allocates and initializes hw and priv. */
 193 struct ieee80211_hw *iwl_alloc_all(struct iwl_cfg *cfg,
 194                 struct ieee80211_ops *hw_ops)
 195 {
 196         struct iwl_priv *priv;
 197
 198         /* mac80211 allocates memory for this device instance, including
 199          *   space for this driver's private structure */
 200         struct ieee80211_hw *hw =
 201                 ieee80211_alloc_hw(sizeof(struct iwl_priv), hw_ops);
 202         if (hw == NULL) {
 203                 printk(KERN_ERR "%s: Can not allocate network device\n",
 204                        cfg->name);
 205                 goto out;
 206         }
 207
 208         priv = hw->priv;
 209         priv->hw = hw;
 210
 211 out:
 212         return hw;
 213 }
 214 EXPORT_SYMBOL(iwl_alloc_all);
 215
 216 void iwl_hw_detect(struct iwl_priv *priv)
 217 {
 218         priv->hw_rev = _iwl_read32(priv, CSR_HW_REV);
 219         priv->hw_wa_rev = _iwl_read32(priv, CSR_HW_REV_WA_REG);
 220         pci_read_config_byte(priv->pci_dev, PCI_REVISION_ID, &priv->rev_id);
 221 }
 222 EXPORT_SYMBOL(iwl_hw_detect);
 223
 224 /*
 225  * QoS  support
 226 */
 227 static void iwl_update_qos(struct iwl_priv *priv)
 228 {
 229         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 230                 return;
 231
 232         priv->qos_data.def_qos_parm.qos_flags = 0;
 233
 234         if (priv->qos_data.qos_active)
 235                 priv->qos_data.def_qos_parm.qos_flags |=
 236                         QOS_PARAM_FLG_UPDATE_EDCA_MSK;
 237
 238         if (priv->current_ht_config.is_ht)
 239                 priv->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
 240
 241         IWL_DEBUG_QOS(priv, "send QoS cmd with Qos active=%d FLAGS=0x%X\n",
 242                       priv->qos_data.qos_active,
 243                       priv->qos_data.def_qos_parm.qos_flags);
 244
 245         iwl_send_cmd_pdu_async(priv, REPLY_QOS_PARAM,
 246                                sizeof(struct iwl_qosparam_cmd),
 247                                &priv->qos_data.def_qos_parm, NULL);
 248 }
 249
 250 #define MAX_BIT_RATE_40_MHZ 150 /* Mbps */
 251 #define MAX_BIT_RATE_20_MHZ 72 /* Mbps */
 252 static void iwlcore_init_ht_hw_capab(const struct iwl_priv *priv,
 253                               struct ieee80211_sta_ht_cap *ht_info,
 254                               enum ieee80211_band band)
 255 {
 256         u16 max_bit_rate = 0;
 257         u8 rx_chains_num = priv->hw_params.rx_chains_num;
 258         u8 tx_chains_num = priv->hw_params.tx_chains_num;
 259
 260         ht_info->cap = 0;
 261         memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));
 262
 263         ht_info->ht_supported = true;
 264
 265         if (priv->cfg->ht_greenfield_support)
 266                 ht_info->cap |= IEEE80211_HT_CAP_GRN_FLD;
 267         ht_info->cap |= IEEE80211_HT_CAP_SGI_20;
 268         max_bit_rate = MAX_BIT_RATE_20_MHZ;
 269         if (priv->hw_params.ht40_channel & BIT(band)) {
 270                 ht_info->cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 271                 ht_info->cap |= IEEE80211_HT_CAP_SGI_40;
 272                 ht_info->mcs.rx_mask[4] = 0x01;
 273                 max_bit_rate = MAX_BIT_RATE_40_MHZ;
 274         }
 275
 276         if (priv->cfg->mod_params->amsdu_size_8K)
 277                 ht_info->cap |= IEEE80211_HT_CAP_MAX_AMSDU;
 278
 279         ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
 280         ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;
 281
 282         ht_info->mcs.rx_mask[0] = 0xFF;
 283         if (rx_chains_num >= 2)
 284                 ht_info->mcs.rx_mask[1] = 0xFF;
 285         if (rx_chains_num >= 3)
 286                 ht_info->mcs.rx_mask[2] = 0xFF;
 287
 288         /* Highest supported Rx data rate */
 289         max_bit_rate *= rx_chains_num;
 290         WARN_ON(max_bit_rate & ~IEEE80211_HT_MCS_RX_HIGHEST_MASK);
 291         ht_info->mcs.rx_highest = cpu_to_le16(max_bit_rate);
 292
 293         /* Tx MCS capabilities */
 294         ht_info->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
 295         if (tx_chains_num != rx_chains_num) {
 296                 ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
 297                 ht_info->mcs.tx_params |= ((tx_chains_num - 1) <<
 298                                 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT);
 299         }
 300 }
 301
 302 /**
 303  * iwlcore_init_geos - Initialize mac80211's geo/channel info based from eeprom
 304  */
 305 int iwlcore_init_geos(struct iwl_priv *priv)
 306 {
 307         struct iwl_channel_info *ch;
 308         struct ieee80211_supported_band *sband;
 309         struct ieee80211_channel *channels;
 310         struct ieee80211_channel *geo_ch;
 311         struct ieee80211_rate *rates;
 312         int i = 0;
 313
 314         if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
 315             priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
 316                 IWL_DEBUG_INFO(priv, "Geography modes already initialized.\n");
 317                 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
 318                 return 0;
 319         }
 320
 321         channels = kzalloc(sizeof(struct ieee80211_channel) *
 322                            priv->channel_count, GFP_KERNEL);
 323         if (!channels)
 324                 return -ENOMEM;
 325
 326         rates = kzalloc((sizeof(struct ieee80211_rate) * IWL_RATE_COUNT_LEGACY),
 327                         GFP_KERNEL);
 328         if (!rates) {
 329                 kfree(channels);
 330                 return -ENOMEM;
 331         }
 332
 333         /* 5.2GHz channels start after the 2.4GHz channels */
 334         sband = &priv->bands[IEEE80211_BAND_5GHZ];
 335         sband->channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)];
 336         /* just OFDM */
 337         sband->bitrates = &rates[IWL_FIRST_OFDM_RATE];
 338         sband->n_bitrates = IWL_RATE_COUNT_LEGACY - IWL_FIRST_OFDM_RATE;
 339
 340         if (priv->cfg->sku & IWL_SKU_N)
 341                 iwlcore_init_ht_hw_capab(priv, &sband->ht_cap,
 342                                          IEEE80211_BAND_5GHZ);
 343
 344         sband = &priv->bands[IEEE80211_BAND_2GHZ];
 345         sband->channels = channels;
 346         /* OFDM & CCK */
 347         sband->bitrates = rates;
 348         sband->n_bitrates = IWL_RATE_COUNT_LEGACY;
 349
 350         if (priv->cfg->sku & IWL_SKU_N)
 351                 iwlcore_init_ht_hw_capab(priv, &sband->ht_cap,
 352                                          IEEE80211_BAND_2GHZ);
 353
 354         priv->ieee_channels = channels;
 355         priv->ieee_rates = rates;
 356
 357         for (i = 0;  i < priv->channel_count; i++) {
 358                 ch = &priv->channel_info[i];
 359
 360                 /* FIXME: might be removed if scan is OK */
 361                 if (!is_channel_valid(ch))
 362                         continue;
 363
 364                 if (is_channel_a_band(ch))
 365                         sband =  &priv->bands[IEEE80211_BAND_5GHZ];
 366                 else
 367                         sband =  &priv->bands[IEEE80211_BAND_2GHZ];
 368
 369                 geo_ch = &sband->channels[sband->n_channels++];
 370
 371                 geo_ch->center_freq =
 372                                 ieee80211_channel_to_frequency(ch->channel);
 373                 geo_ch->max_power = ch->max_power_avg;
 374                 geo_ch->max_antenna_gain = 0xff;
 375                 geo_ch->hw_value = ch->channel;
 376
 377                 if (is_channel_valid(ch)) {
 378                         if (!(ch->flags & EEPROM_CHANNEL_IBSS))
 379                                 geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
 380
 381                         if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
 382                                 geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
 383
 384                         if (ch->flags & EEPROM_CHANNEL_RADAR)
 385                                 geo_ch->flags |= IEEE80211_CHAN_RADAR;
 386
 387                         geo_ch->flags |= ch->ht40_extension_channel;
 388
 389                         if (ch->max_power_avg > priv->tx_power_device_lmt)
 390                                 priv->tx_power_device_lmt = ch->max_power_avg;
 391                 } else {
 392                         geo_ch->flags |= IEEE80211_CHAN_DISABLED;
 393                 }
 394
 395                 IWL_DEBUG_INFO(priv, "Channel %d Freq=%d[%sGHz] %s flag=0x%X\n",
 396                                 ch->channel, geo_ch->center_freq,
 397                                 is_channel_a_band(ch) ?  "5.2" : "2.4",
 398                                 geo_ch->flags & IEEE80211_CHAN_DISABLED ?
 399                                 "restricted" : "valid",
 400                                  geo_ch->flags);
 401         }
 402
 403         if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) &&
 404              priv->cfg->sku & IWL_SKU_A) {
 405                 IWL_INFO(priv, "Incorrectly detected BG card as ABG. "
 406                         "Please send your PCI ID 0x%04X:0x%04X to maintainer.\n",
 407                            priv->pci_dev->device,
 408                            priv->pci_dev->subsystem_device);
 409                 priv->cfg->sku &= ~IWL_SKU_A;
 410         }
 411
 412         IWL_INFO(priv, "Tunable channels: %d 802.11bg, %d 802.11a channels\n",
 413                    priv->bands[IEEE80211_BAND_2GHZ].n_channels,
 414                    priv->bands[IEEE80211_BAND_5GHZ].n_channels);
 415
 416         set_bit(STATUS_GEO_CONFIGURED, &priv->status);
 417
 418         return 0;
 419 }
 420 EXPORT_SYMBOL(iwlcore_init_geos);
 421
 422 /*
 423  * iwlcore_free_geos - undo allocations in iwlcore_init_geos
 424  */
 425 void iwlcore_free_geos(struct iwl_priv *priv)
 426 {
 427         kfree(priv->ieee_channels);
 428         kfree(priv->ieee_rates);
 429         clear_bit(STATUS_GEO_CONFIGURED, &priv->status);
 430 }
 431 EXPORT_SYMBOL(iwlcore_free_geos);
 432
 433 /*
 434  *  iwlcore_rts_tx_cmd_flag: Set rts/cts. 3945 and 4965 only share this
 435  *  function.
 436  */
 437 void iwlcore_rts_tx_cmd_flag(struct ieee80211_tx_info *info,
 438                                 __le32 *tx_flags)
 439 {
 440         if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) {
 441                 *tx_flags |= TX_CMD_FLG_RTS_MSK;
 442                 *tx_flags &= ~TX_CMD_FLG_CTS_MSK;
 443         } else if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
 444                 *tx_flags &= ~TX_CMD_FLG_RTS_MSK;
 445                 *tx_flags |= TX_CMD_FLG_CTS_MSK;
 446         }
 447 }
 448 EXPORT_SYMBOL(iwlcore_rts_tx_cmd_flag);
 449
 450 static bool is_single_rx_stream(struct iwl_priv *priv)
 451 {
 452         return priv->current_ht_config.smps == IEEE80211_SMPS_STATIC ||
 453                priv->current_ht_config.single_chain_sufficient;
 454 }
 455
 456 static u8 iwl_is_channel_extension(struct iwl_priv *priv,
 457                                    enum ieee80211_band band,
 458                                    u16 channel, u8 extension_chan_offset)
 459 {
 460         const struct iwl_channel_info *ch_info;
 461
 462         ch_info = iwl_get_channel_info(priv, band, channel);
 463         if (!is_channel_valid(ch_info))
 464                 return 0;
 465
 466         if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE)
 467                 return !(ch_info->ht40_extension_channel &
 468                                         IEEE80211_CHAN_NO_HT40PLUS);
 469         else if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW)
 470                 return !(ch_info->ht40_extension_channel &
 471                                         IEEE80211_CHAN_NO_HT40MINUS);
 472
 473         return 0;
 474 }
 475
 476 u8 iwl_is_ht40_tx_allowed(struct iwl_priv *priv,
 477                          struct ieee80211_sta_ht_cap *sta_ht_inf)
 478 {
 479         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
 480
 481         if (!ht_conf->is_ht || !ht_conf->is_40mhz)
 482                 return 0;
 483
 484         /* We do not check for IEEE80211_HT_CAP_SUP_WIDTH_20_40
 485          * the bit will not set if it is pure 40MHz case
 486          */
 487         if (sta_ht_inf) {
 488                 if (!sta_ht_inf->ht_supported)
 489                         return 0;
 490         }
 491 #ifdef CONFIG_IWLWIFI_DEBUG
 492         if (priv->disable_ht40)
 493                 return 0;
 494 #endif
 495         return iwl_is_channel_extension(priv, priv->band,
 496                         le16_to_cpu(priv->staging_rxon.channel),
 497                         ht_conf->extension_chan_offset);
 498 }
 499 EXPORT_SYMBOL(iwl_is_ht40_tx_allowed);
 500
 501 static u16 iwl_adjust_beacon_interval(u16 beacon_val, u16 max_beacon_val)
 502 {
 503         u16 new_val = 0;
 504         u16 beacon_factor = 0;
 505
 506         beacon_factor = (beacon_val + max_beacon_val) / max_beacon_val;
 507         new_val = beacon_val / beacon_factor;
 508
 509         if (!new_val)
 510                 new_val = max_beacon_val;
 511
 512         return new_val;
 513 }
 514
 515 void iwl_setup_rxon_timing(struct iwl_priv *priv)
 516 {
 517         u64 tsf;
 518         s32 interval_tm, rem;
 519         unsigned long flags;
 520         struct ieee80211_conf *conf = NULL;
 521         u16 beacon_int;
 522
 523         conf = ieee80211_get_hw_conf(priv->hw);
 524
 525         spin_lock_irqsave(&priv->lock, flags);
 526         priv->rxon_timing.timestamp = cpu_to_le64(priv->timestamp);
 527         priv->rxon_timing.listen_interval = cpu_to_le16(conf->listen_interval);
 528
 529         if (priv->iw_mode == NL80211_IFTYPE_STATION) {
 530                 beacon_int = priv->beacon_int;
 531                 priv->rxon_timing.atim_window = 0;
 532         } else {
 533                 beacon_int = priv->vif->bss_conf.beacon_int;
 534
 535                 /* TODO: we need to get atim_window from upper stack
 536                  * for now we set to 0 */
 537                 priv->rxon_timing.atim_window = 0;
 538         }
 539
 540         beacon_int = iwl_adjust_beacon_interval(beacon_int,
 541                                 priv->hw_params.max_beacon_itrvl * 1024);
 542         priv->rxon_timing.beacon_interval = cpu_to_le16(beacon_int);
 543
 544         tsf = priv->timestamp; /* tsf is modifed by do_div: copy it */
 545         interval_tm = beacon_int * 1024;
 546         rem = do_div(tsf, interval_tm);
 547         priv->rxon_timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
 548
 549         spin_unlock_irqrestore(&priv->lock, flags);
 550         IWL_DEBUG_ASSOC(priv,
 551                         "beacon interval %d beacon timer %d beacon tim %d\n",
 552                         le16_to_cpu(priv->rxon_timing.beacon_interval),
 553                         le32_to_cpu(priv->rxon_timing.beacon_init_val),
 554                         le16_to_cpu(priv->rxon_timing.atim_window));
 555 }
 556 EXPORT_SYMBOL(iwl_setup_rxon_timing);
 557
 558 void iwl_set_rxon_hwcrypto(struct iwl_priv *priv, int hw_decrypt)
 559 {
 560         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
 561
 562         if (hw_decrypt)
 563                 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
 564         else
 565                 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
 566
 567 }
 568 EXPORT_SYMBOL(iwl_set_rxon_hwcrypto);
 569
 570 /**
 571  * iwl_check_rxon_cmd - validate RXON structure is valid
 572  *
 573  * NOTE:  This is really only useful during development and can eventually
 574  * be #ifdef'd out once the driver is stable and folks aren't actively
 575  * making changes
 576  */
 577 int iwl_check_rxon_cmd(struct iwl_priv *priv)
 578 {
 579         int error = 0;
 580         int counter = 1;
 581         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
 582
 583         if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
 584                 error |= le32_to_cpu(rxon->flags &
 585                                 (RXON_FLG_TGJ_NARROW_BAND_MSK |
 586                                  RXON_FLG_RADAR_DETECT_MSK));
 587                 if (error)
 588                         IWL_WARN(priv, "check 24G fields %d | %d\n",
 589                                     counter++, error);
 590         } else {
 591                 error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ?
 592                                 0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK);
 593                 if (error)
 594                         IWL_WARN(priv, "check 52 fields %d | %d\n",
 595                                     counter++, error);
 596                 error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK);
 597                 if (error)
 598                         IWL_WARN(priv, "check 52 CCK %d | %d\n",
 599                                     counter++, error);
 600         }
 601         error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1;
 602         if (error)
 603                 IWL_WARN(priv, "check mac addr %d | %d\n", counter++, error);
 604
 605         /* make sure basic rates 6Mbps and 1Mbps are supported */
 606         error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) &&
 607                   ((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0));
 608         if (error)
 609                 IWL_WARN(priv, "check basic rate %d | %d\n", counter++, error);
 610
 611         error |= (le16_to_cpu(rxon->assoc_id) > 2007);
 612         if (error)
 613                 IWL_WARN(priv, "check assoc id %d | %d\n", counter++, error);
 614
 615         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
 616                         == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK));
 617         if (error)
 618                 IWL_WARN(priv, "check CCK and short slot %d | %d\n",
 619                             counter++, error);
 620
 621         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
 622                         == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK));
 623         if (error)
 624                 IWL_WARN(priv, "check CCK & auto detect %d | %d\n",
 625                             counter++, error);
 626
 627         error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
 628                         RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK);
 629         if (error)
 630                 IWL_WARN(priv, "check TGG and auto detect %d | %d\n",
 631                             counter++, error);
 632
 633         if (error)
 634                 IWL_WARN(priv, "Tuning to channel %d\n",
 635                             le16_to_cpu(rxon->channel));
 636
 637         if (error) {
 638                 IWL_ERR(priv, "Not a valid iwl_rxon_assoc_cmd field values\n");
 639                 return -1;
 640         }
 641         return 0;
 642 }
 643 EXPORT_SYMBOL(iwl_check_rxon_cmd);
 644
 645 /**
 646  * iwl_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
 647  * @priv: staging_rxon is compared to active_rxon
 648  *
 649  * If the RXON structure is changing enough to require a new tune,
 650  * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
 651  * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
 652  */
 653 int iwl_full_rxon_required(struct iwl_priv *priv)
 654 {
 655
 656         /* These items are only settable from the full RXON command */
 657         if (!(iwl_is_associated(priv)) ||
 658             compare_ether_addr(priv->staging_rxon.bssid_addr,
 659                                priv->active_rxon.bssid_addr) ||
 660             compare_ether_addr(priv->staging_rxon.node_addr,
 661                                priv->active_rxon.node_addr) ||
 662             compare_ether_addr(priv->staging_rxon.wlap_bssid_addr,
 663                                priv->active_rxon.wlap_bssid_addr) ||
 664             (priv->staging_rxon.dev_type != priv->active_rxon.dev_type) ||
 665             (priv->staging_rxon.channel != priv->active_rxon.channel) ||
 666             (priv->staging_rxon.air_propagation !=
 667              priv->active_rxon.air_propagation) ||
 668             (priv->staging_rxon.ofdm_ht_single_stream_basic_rates !=
 669              priv->active_rxon.ofdm_ht_single_stream_basic_rates) ||
 670             (priv->staging_rxon.ofdm_ht_dual_stream_basic_rates !=
 671              priv->active_rxon.ofdm_ht_dual_stream_basic_rates) ||
 672             (priv->staging_rxon.ofdm_ht_triple_stream_basic_rates !=
 673              priv->active_rxon.ofdm_ht_triple_stream_basic_rates) ||
 674             (priv->staging_rxon.assoc_id != priv->active_rxon.assoc_id))
 675                 return 1;
 676
 677         /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
 678          * be updated with the RXON_ASSOC command -- however only some
 679          * flag transitions are allowed using RXON_ASSOC */
 680
 681         /* Check if we are not switching bands */
 682         if ((priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) !=
 683             (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK))
 684                 return 1;
 685
 686         /* Check if we are switching association toggle */
 687         if ((priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) !=
 688                 (priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK))
 689                 return 1;
 690
 691         return 0;
 692 }
 693 EXPORT_SYMBOL(iwl_full_rxon_required);
 694
 695 u8 iwl_rate_get_lowest_plcp(struct iwl_priv *priv)
 696 {
 697         /*
 698          * Assign the lowest rate -- should really get this from
 699          * the beacon skb from mac80211.
 700          */
 701         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)
 702                 return IWL_RATE_1M_PLCP;
 703         else
 704                 return IWL_RATE_6M_PLCP;
 705 }
 706 EXPORT_SYMBOL(iwl_rate_get_lowest_plcp);
 707
 708 void iwl_set_rxon_ht(struct iwl_priv *priv, struct iwl_ht_config *ht_conf)
 709 {
 710         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
 711
 712         if (!ht_conf->is_ht) {
 713                 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
 714                         RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK |
 715                         RXON_FLG_HT40_PROT_MSK |
 716                         RXON_FLG_HT_PROT_MSK);
 717                 return;
 718         }
 719
 720         /* FIXME: if the definition of ht_protection changed, the "translation"
 721          * will be needed for rxon->flags
 722          */
 723         rxon->flags |= cpu_to_le32(ht_conf->ht_protection << RXON_FLG_HT_OPERATING_MODE_POS);
 724
 725         /* Set up channel bandwidth:
 726          * 20 MHz only, 20/40 mixed or pure 40 if ht40 ok */
 727         /* clear the HT channel mode before set the mode */
 728         rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
 729                          RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
 730         if (iwl_is_ht40_tx_allowed(priv, NULL)) {
 731                 /* pure ht40 */
 732                 if (ht_conf->ht_protection == IEEE80211_HT_OP_MODE_PROTECTION_20MHZ) {
 733                         rxon->flags |= RXON_FLG_CHANNEL_MODE_PURE_40;
 734                         /* Note: control channel is opposite of extension channel */
 735                         switch (ht_conf->extension_chan_offset) {
 736                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 737                                 rxon->flags &= ~RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
 738                                 break;
 739                         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 740                                 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
 741                                 break;
 742                         }
 743                 } else {
 744                         /* Note: control channel is opposite of extension channel */
 745                         switch (ht_conf->extension_chan_offset) {
 746                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 747                                 rxon->flags &= ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
 748                                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
 749                                 break;
 750                         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 751                                 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
 752                                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
 753                                 break;
 754                         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
 755                         default:
 756                                 /* channel location only valid if in Mixed mode */
 757                                 IWL_ERR(priv, "invalid extension channel offset\n");
 758                                 break;
 759                         }
 760                 }
 761         } else {
 762                 rxon->flags |= RXON_FLG_CHANNEL_MODE_LEGACY;
 763         }
 764
 765         if (priv->cfg->ops->hcmd->set_rxon_chain)
 766                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
 767
 768         IWL_DEBUG_ASSOC(priv, "rxon flags 0x%X operation mode :0x%X "
 769                         "extension channel offset 0x%x\n",
 770                         le32_to_cpu(rxon->flags), ht_conf->ht_protection,
 771                         ht_conf->extension_chan_offset);
 772         return;
 773 }
 774 EXPORT_SYMBOL(iwl_set_rxon_ht);
 775
 776 #define IWL_NUM_RX_CHAINS_MULTIPLE      3
 777 #define IWL_NUM_RX_CHAINS_SINGLE        2
 778 #define IWL_NUM_IDLE_CHAINS_DUAL        2
 779 #define IWL_NUM_IDLE_CHAINS_SINGLE      1
 780
 781 /*
 782  * Determine how many receiver/antenna chains to use.
 783  *
 784  * More provides better reception via diversity.  Fewer saves power
 785  * at the expense of throughput, but only when not in powersave to
 786  * start with.
 787  *
 788  * MIMO (dual stream) requires at least 2, but works better with 3.
 789  * This does not determine *which* chains to use, just how many.
 790  */
 791 static int iwl_get_active_rx_chain_count(struct iwl_priv *priv)
 792 {
 793         /* # of Rx chains to use when expecting MIMO. */
 794         if (is_single_rx_stream(priv))
 795                 return IWL_NUM_RX_CHAINS_SINGLE;
 796         else
 797                 return IWL_NUM_RX_CHAINS_MULTIPLE;
 798 }
 799
 800 /*
 801  * When we are in power saving mode, unless device support spatial
 802  * multiplexing power save, use the active count for rx chain count.
 803  */
 804 static int iwl_get_idle_rx_chain_count(struct iwl_priv *priv, int active_cnt)
 805 {
 806         /* # Rx chains when idling, depending on SMPS mode */
 807         switch (priv->current_ht_config.smps) {
 808         case IEEE80211_SMPS_STATIC:
 809         case IEEE80211_SMPS_DYNAMIC:
 810                 return IWL_NUM_IDLE_CHAINS_SINGLE;
 811         case IEEE80211_SMPS_OFF:
 812                 return active_cnt;
 813         default:
 814                 WARN(1, "invalid SMPS mode %d",
 815                      priv->current_ht_config.smps);
 816                 return active_cnt;
 817         }
 818 }
 819
 820 /* up to 4 chains */
 821 static u8 iwl_count_chain_bitmap(u32 chain_bitmap)
 822 {
 823         u8 res;
 824         res = (chain_bitmap & BIT(0)) >> 0;
 825         res += (chain_bitmap & BIT(1)) >> 1;
 826         res += (chain_bitmap & BIT(2)) >> 2;
 827         res += (chain_bitmap & BIT(3)) >> 3;
 828         return res;
 829 }
 830
 831 /**
 832  * iwl_set_rxon_chain - Set up Rx chain usage in "staging" RXON image
 833  *
 834  * Selects how many and which Rx receivers/antennas/chains to use.
 835  * This should not be used for scan command ... it puts data in wrong place.
 836  */
 837 void iwl_set_rxon_chain(struct iwl_priv *priv)
 838 {
 839         bool is_single = is_single_rx_stream(priv);
 840         bool is_cam = !test_bit(STATUS_POWER_PMI, &priv->status);
 841         u8 idle_rx_cnt, active_rx_cnt, valid_rx_cnt;
 842         u32 active_chains;
 843         u16 rx_chain;
 844
 845         /* Tell uCode which antennas are actually connected.
 846          * Before first association, we assume all antennas are connected.
 847          * Just after first association, iwl_chain_noise_calibration()
 848          *    checks which antennas actually *are* connected. */
 849          if (priv->chain_noise_data.active_chains)
 850                 active_chains = priv->chain_noise_data.active_chains;
 851         else
 852                 active_chains = priv->hw_params.valid_rx_ant;
 853
 854         rx_chain = active_chains << RXON_RX_CHAIN_VALID_POS;
 855
 856         /* How many receivers should we use? */
 857         active_rx_cnt = iwl_get_active_rx_chain_count(priv);
 858         idle_rx_cnt = iwl_get_idle_rx_chain_count(priv, active_rx_cnt);
 859
 860
 861         /* correct rx chain count according hw settings
 862          * and chain noise calibration
 863          */
 864         valid_rx_cnt = iwl_count_chain_bitmap(active_chains);
 865         if (valid_rx_cnt < active_rx_cnt)
 866                 active_rx_cnt = valid_rx_cnt;
 867
 868         if (valid_rx_cnt < idle_rx_cnt)
 869                 idle_rx_cnt = valid_rx_cnt;
 870
 871         rx_chain |= active_rx_cnt << RXON_RX_CHAIN_MIMO_CNT_POS;
 872         rx_chain |= idle_rx_cnt  << RXON_RX_CHAIN_CNT_POS;
 873
 874         priv->staging_rxon.rx_chain = cpu_to_le16(rx_chain);
 875
 876         if (!is_single && (active_rx_cnt >= IWL_NUM_RX_CHAINS_SINGLE) && is_cam)
 877                 priv->staging_rxon.rx_chain |= RXON_RX_CHAIN_MIMO_FORCE_MSK;
 878         else
 879                 priv->staging_rxon.rx_chain &= ~RXON_RX_CHAIN_MIMO_FORCE_MSK;
 880
 881         IWL_DEBUG_ASSOC(priv, "rx_chain=0x%X active=%d idle=%d\n",
 882                         priv->staging_rxon.rx_chain,
 883                         active_rx_cnt, idle_rx_cnt);
 884
 885         WARN_ON(active_rx_cnt == 0 || idle_rx_cnt == 0 ||
 886                 active_rx_cnt < idle_rx_cnt);
 887 }
 888 EXPORT_SYMBOL(iwl_set_rxon_chain);
 889
 890 /**
 891  * iwl_set_rxon_channel - Set the phymode and channel values in staging RXON
 892  * @phymode: MODE_IEEE80211A sets to 5.2GHz; all else set to 2.4GHz
 893  * @channel: Any channel valid for the requested phymode
 894
 895  * In addition to setting the staging RXON, priv->phymode is also set.
 896  *
 897  * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
 898  * in the staging RXON flag structure based on the phymode
 899  */
 900 int iwl_set_rxon_channel(struct iwl_priv *priv, struct ieee80211_channel *ch)
 901 {
 902         enum ieee80211_band band = ch->band;
 903         u16 channel = ieee80211_frequency_to_channel(ch->center_freq);
 904
 905         if (!iwl_get_channel_info(priv, band, channel)) {
 906                 IWL_DEBUG_INFO(priv, "Could not set channel to %d [%d]\n",
 907                                channel, band);
 908                 return -EINVAL;
 909         }
 910
 911         if ((le16_to_cpu(priv->staging_rxon.channel) == channel) &&
 912             (priv->band == band))
 913                 return 0;
 914
 915         priv->staging_rxon.channel = cpu_to_le16(channel);
 916         if (band == IEEE80211_BAND_5GHZ)
 917                 priv->staging_rxon.flags &= ~RXON_FLG_BAND_24G_MSK;
 918         else
 919                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
 920
 921         priv->band = band;
 922
 923         IWL_DEBUG_INFO(priv, "Staging channel set to %d [%d]\n", channel, band);
 924
 925         return 0;
 926 }
 927 EXPORT_SYMBOL(iwl_set_rxon_channel);
 928
 929 void iwl_set_flags_for_band(struct iwl_priv *priv,
 930                             enum ieee80211_band band)
 931 {
 932         if (band == IEEE80211_BAND_5GHZ) {
 933                 priv->staging_rxon.flags &=
 934                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
 935                       | RXON_FLG_CCK_MSK);
 936                 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
 937         } else {
 938                 /* Copied from iwl_post_associate() */
 939                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
 940                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
 941                 else
 942                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
 943
 944                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
 945                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
 946
 947                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
 948                 priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
 949                 priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
 950         }
 951 }
 952
 953 /*
 954  * initialize rxon structure with default values from eeprom
 955  */
 956 void iwl_connection_init_rx_config(struct iwl_priv *priv, int mode)
 957 {
 958         const struct iwl_channel_info *ch_info;
 959
 960         memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
 961
 962         switch (mode) {
 963         case NL80211_IFTYPE_AP:
 964                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
 965                 break;
 966
 967         case NL80211_IFTYPE_STATION:
 968                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
 969                 priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
 970                 break;
 971
 972         case NL80211_IFTYPE_ADHOC:
 973                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
 974                 priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
 975                 priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
 976                                                   RXON_FILTER_ACCEPT_GRP_MSK;
 977                 break;
 978
 979         default:
 980                 IWL_ERR(priv, "Unsupported interface type %d\n", mode);
 981                 break;
 982         }
 983
 984 #if 0
 985         /* TODO:  Figure out when short_preamble would be set and cache from
 986          * that */
 987         if (!hw_to_local(priv->hw)->short_preamble)
 988                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
 989         else
 990                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
 991 #endif
 992
 993         ch_info = iwl_get_channel_info(priv, priv->band,
 994                                        le16_to_cpu(priv->active_rxon.channel));
 995
 996         if (!ch_info)
 997                 ch_info = &priv->channel_info[0];
 998
 999         priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
1000         priv->band = ch_info->band;
1001
1002         iwl_set_flags_for_band(priv, priv->band);
1003
1004         priv->staging_rxon.ofdm_basic_rates =
1005             (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
1006         priv->staging_rxon.cck_basic_rates =
1007             (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
1008
1009         /* clear both MIX and PURE40 mode flag */
1010         priv->staging_rxon.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED |
1011                                         RXON_FLG_CHANNEL_MODE_PURE_40);
1012         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
1013         memcpy(priv->staging_rxon.wlap_bssid_addr, priv->mac_addr, ETH_ALEN);
1014         priv->staging_rxon.ofdm_ht_single_stream_basic_rates = 0xff;
1015         priv->staging_rxon.ofdm_ht_dual_stream_basic_rates = 0xff;
1016         priv->staging_rxon.ofdm_ht_triple_stream_basic_rates = 0xff;
1017 }
1018 EXPORT_SYMBOL(iwl_connection_init_rx_config);
1019
1020 static void iwl_set_rate(struct iwl_priv *priv)
1021 {
1022         const struct ieee80211_supported_band *hw = NULL;
1023         struct ieee80211_rate *rate;
1024         int i;
1025
1026         hw = iwl_get_hw_mode(priv, priv->band);
1027         if (!hw) {
1028                 IWL_ERR(priv, "Failed to set rate: unable to get hw mode\n");
1029                 return;
1030         }
1031
1032         priv->active_rate = 0;
1033
1034         for (i = 0; i < hw->n_bitrates; i++) {
1035                 rate = &(hw->bitrates[i]);
1036                 if (rate->hw_value < IWL_RATE_COUNT_LEGACY)
1037                         priv->active_rate |= (1 << rate->hw_value);
1038         }
1039
1040         IWL_DEBUG_RATE(priv, "Set active_rate = %0x\n", priv->active_rate);
1041
1042         priv->staging_rxon.cck_basic_rates =
1043             (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
1044
1045         priv->staging_rxon.ofdm_basic_rates =
1046            (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
1047 }
1048
1049 void iwl_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
1050 {
1051         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1052         struct iwl_rxon_cmd *rxon = (void *)&priv->active_rxon;
1053         struct iwl_csa_notification *csa = &(pkt->u.csa_notif);
1054
1055         if (priv->switch_rxon.switch_in_progress) {
1056                 if (!le32_to_cpu(csa->status) &&
1057                     (csa->channel == priv->switch_rxon.channel)) {
1058                         rxon->channel = csa->channel;
1059                         priv->staging_rxon.channel = csa->channel;
1060                         IWL_DEBUG_11H(priv, "CSA notif: channel %d\n",
1061                               le16_to_cpu(csa->channel));
1062                 } else
1063                         IWL_ERR(priv, "CSA notif (fail) : channel %d\n",
1064                               le16_to_cpu(csa->channel));
1065
1066                 priv->switch_rxon.switch_in_progress = false;
1067         }
1068 }
1069 EXPORT_SYMBOL(iwl_rx_csa);
1070
1071 #ifdef CONFIG_IWLWIFI_DEBUG
1072 void iwl_print_rx_config_cmd(struct iwl_priv *priv)
1073 {
1074         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
1075
1076         IWL_DEBUG_RADIO(priv, "RX CONFIG:\n");
1077         iwl_print_hex_dump(priv, IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
1078         IWL_DEBUG_RADIO(priv, "u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
1079         IWL_DEBUG_RADIO(priv, "u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
1080         IWL_DEBUG_RADIO(priv, "u32 filter_flags: 0x%08x\n",
1081                         le32_to_cpu(rxon->filter_flags));
1082         IWL_DEBUG_RADIO(priv, "u8 dev_type: 0x%x\n", rxon->dev_type);
1083         IWL_DEBUG_RADIO(priv, "u8 ofdm_basic_rates: 0x%02x\n",
1084                         rxon->ofdm_basic_rates);
1085         IWL_DEBUG_RADIO(priv, "u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
1086         IWL_DEBUG_RADIO(priv, "u8[6] node_addr: %pM\n", rxon->node_addr);
1087         IWL_DEBUG_RADIO(priv, "u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
1088         IWL_DEBUG_RADIO(priv, "u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
1089 }
1090 EXPORT_SYMBOL(iwl_print_rx_config_cmd);
1091 #endif
1092 /**
1093  * iwl_irq_handle_error - called for HW or SW error interrupt from card
1094  */
1095 void iwl_irq_handle_error(struct iwl_priv *priv)
1096 {
1097         /* Set the FW error flag -- cleared on iwl_down */
1098         set_bit(STATUS_FW_ERROR, &priv->status);
1099
1100         /* Cancel currently queued command. */
1101         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
1102
1103         priv->cfg->ops->lib->dump_nic_error_log(priv);
1104         if (priv->cfg->ops->lib->dump_csr)
1105                 priv->cfg->ops->lib->dump_csr(priv);
1106         if (priv->cfg->ops->lib->dump_fh)
1107                 priv->cfg->ops->lib->dump_fh(priv, NULL, false);
1108         priv->cfg->ops->lib->dump_nic_event_log(priv, false, NULL, false);
1109 #ifdef CONFIG_IWLWIFI_DEBUG
1110         if (iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS)
1111                 iwl_print_rx_config_cmd(priv);
1112 #endif
1113
1114         wake_up_interruptible(&priv->wait_command_queue);
1115
1116         /* Keep the restart process from trying to send host
1117          * commands by clearing the INIT status bit */
1118         clear_bit(STATUS_READY, &priv->status);
1119
1120         if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1121                 IWL_DEBUG(priv, IWL_DL_FW_ERRORS,
1122                           "Restarting adapter due to uCode error.\n");
1123
1124                 if (priv->cfg->mod_params->restart_fw)
1125                         queue_work(priv->workqueue, &priv->restart);
1126         }
1127 }
1128 EXPORT_SYMBOL(iwl_irq_handle_error);
1129
1130 static int iwl_apm_stop_master(struct iwl_priv *priv)
1131 {
1132         int ret = 0;
1133
1134         /* stop device's busmaster DMA activity */
1135         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
1136
1137         ret = iwl_poll_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_MASTER_DISABLED,
1138                         CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
1139         if (ret)
1140                 IWL_WARN(priv, "Master Disable Timed Out, 100 usec\n");
1141
1142         IWL_DEBUG_INFO(priv, "stop master\n");
1143
1144         return ret;
1145 }
1146
1147 void iwl_apm_stop(struct iwl_priv *priv)
1148 {
1149         IWL_DEBUG_INFO(priv, "Stop card, put in low power state\n");
1150
1151         /* Stop device's DMA activity */
1152         iwl_apm_stop_master(priv);
1153
1154         /* Reset the entire device */
1155         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
1156
1157         udelay(10);
1158
1159         /*
1160          * Clear "initialization complete" bit to move adapter from
1161          * D0A* (powered-up Active) --> D0U* (Uninitialized) state.
1162          */
1163         iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1164 }
1165 EXPORT_SYMBOL(iwl_apm_stop);
1166
1167
1168 /*
1169  * Start up NIC's basic functionality after it has been reset
1170  * (e.g. after platform boot, or shutdown via iwl_apm_stop())
1171  * NOTE:  This does not load uCode nor start the embedded processor
1172  */
1173 int iwl_apm_init(struct iwl_priv *priv)
1174 {
1175         int ret = 0;
1176         u16 lctl;
1177
1178         IWL_DEBUG_INFO(priv, "Init card's basic functions\n");
1179
1180         /*
1181          * Use "set_bit" below rather than "write", to preserve any hardware
1182          * bits already set by default after reset.
1183          */
1184
1185         /* Disable L0S exit timer (platform NMI Work/Around) */
1186         iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
1187                           CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
1188
1189         /*
1190          * Disable L0s without affecting L1;
1191          *  don't wait for ICH L0s (ICH bug W/A)
1192          */
1193         iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
1194                           CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
1195
1196         /* Set FH wait threshold to maximum (HW error during stress W/A) */
1197         iwl_set_bit(priv, CSR_DBG_HPET_MEM_REG, CSR_DBG_HPET_MEM_REG_VAL);
1198
1199         /*
1200          * Enable HAP INTA (interrupt from management bus) to
1201          * wake device's PCI Express link L1a -> L0s
1202          * NOTE:  This is no-op for 3945 (non-existant bit)
1203          */
1204         iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1205                                     CSR_HW_IF_CONFIG_REG_BIT_HAP_WAKE_L1A);
1206
1207         /*
1208          * HW bug W/A for instability in PCIe bus L0->L0S->L1 transition.
1209          * Check if BIOS (or OS) enabled L1-ASPM on this device.
1210          * If so (likely), disable L0S, so device moves directly L0->L1;
1211          *    costs negligible amount of power savings.
1212          * If not (unlikely), enable L0S, so there is at least some
1213          *    power savings, even without L1.
1214          */
1215         if (priv->cfg->set_l0s) {
1216                 lctl = iwl_pcie_link_ctl(priv);
1217                 if ((lctl & PCI_CFG_LINK_CTRL_VAL_L1_EN) ==
1218                                         PCI_CFG_LINK_CTRL_VAL_L1_EN) {
1219                         /* L1-ASPM enabled; disable(!) L0S  */
1220                         iwl_set_bit(priv, CSR_GIO_REG,
1221                                         CSR_GIO_REG_VAL_L0S_ENABLED);
1222                         IWL_DEBUG_POWER(priv, "L1 Enabled; Disabling L0S\n");
1223                 } else {
1224                         /* L1-ASPM disabled; enable(!) L0S */
1225                         iwl_clear_bit(priv, CSR_GIO_REG,
1226                                         CSR_GIO_REG_VAL_L0S_ENABLED);
1227                         IWL_DEBUG_POWER(priv, "L1 Disabled; Enabling L0S\n");
1228                 }
1229         }
1230
1231         /* Configure analog phase-lock-loop before activating to D0A */
1232         if (priv->cfg->pll_cfg_val)
1233                 iwl_set_bit(priv, CSR_ANA_PLL_CFG, priv->cfg->pll_cfg_val);
1234
1235         /*
1236          * Set "initialization complete" bit to move adapter from
1237          * D0U* --> D0A* (powered-up active) state.
1238          */
1239         iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1240
1241         /*
1242          * Wait for clock stabilization; once stabilized, access to
1243          * device-internal resources is supported, e.g. iwl_write_prph()
1244          * and accesses to uCode SRAM.
1245          */
1246         ret = iwl_poll_bit(priv, CSR_GP_CNTRL,
1247                         CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
1248                         CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
1249         if (ret < 0) {
1250                 IWL_DEBUG_INFO(priv, "Failed to init the card\n");
1251                 goto out;
1252         }
1253
1254         /*
1255          * Enable DMA and BSM (if used) clocks, wait for them to stabilize.
1256          * BSM (Boostrap State Machine) is only in 3945 and 4965;
1257          * later devices (i.e. 5000 and later) have non-volatile SRAM,
1258          * and don't need BSM to restore data after power-saving sleep.
1259          *
1260          * Write to "CLK_EN_REG"; "1" bits enable clocks, while "0" bits
1261          * do not disable clocks.  This preserves any hardware bits already
1262          * set by default in "CLK_CTRL_REG" after reset.
1263          */
1264         if (priv->cfg->use_bsm)
1265                 iwl_write_prph(priv, APMG_CLK_EN_REG,
1266                         APMG_CLK_VAL_DMA_CLK_RQT | APMG_CLK_VAL_BSM_CLK_RQT);
1267         else
1268                 iwl_write_prph(priv, APMG_CLK_EN_REG,
1269                         APMG_CLK_VAL_DMA_CLK_RQT);
1270         udelay(20);
1271
1272         /* Disable L1-Active */
1273         iwl_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
1274                           APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
1275
1276 out:
1277         return ret;
1278 }
1279 EXPORT_SYMBOL(iwl_apm_init);
1280
1281
1282
1283 void iwl_configure_filter(struct ieee80211_hw *hw,
1284                           unsigned int changed_flags,
1285                           unsigned int *total_flags,
1286                           u64 multicast)
1287 {
1288         struct iwl_priv *priv = hw->priv;
1289         __le32 *filter_flags = &priv->staging_rxon.filter_flags;
1290
1291         IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
1292                         changed_flags, *total_flags);
1293
1294         if (changed_flags & (FIF_OTHER_BSS | FIF_PROMISC_IN_BSS)) {
1295                 if (*total_flags & (FIF_OTHER_BSS | FIF_PROMISC_IN_BSS))
1296                         *filter_flags |= RXON_FILTER_PROMISC_MSK;
1297                 else
1298                         *filter_flags &= ~RXON_FILTER_PROMISC_MSK;
1299         }
1300         if (changed_flags & FIF_ALLMULTI) {
1301                 if (*total_flags & FIF_ALLMULTI)
1302                         *filter_flags |= RXON_FILTER_ACCEPT_GRP_MSK;
1303                 else
1304                         *filter_flags &= ~RXON_FILTER_ACCEPT_GRP_MSK;
1305         }
1306         if (changed_flags & FIF_CONTROL) {
1307                 if (*total_flags & FIF_CONTROL)
1308                         *filter_flags |= RXON_FILTER_CTL2HOST_MSK;
1309                 else
1310                         *filter_flags &= ~RXON_FILTER_CTL2HOST_MSK;
1311         }
1312         if (changed_flags & FIF_BCN_PRBRESP_PROMISC) {
1313                 if (*total_flags & FIF_BCN_PRBRESP_PROMISC)
1314                         *filter_flags |= RXON_FILTER_BCON_AWARE_MSK;
1315                 else
1316                         *filter_flags &= ~RXON_FILTER_BCON_AWARE_MSK;
1317         }
1318
1319         /* We avoid iwl_commit_rxon here to commit the new filter flags
1320          * since mac80211 will call ieee80211_hw_config immediately.
1321          * (mc_list is not supported at this time). Otherwise, we need to
1322          * queue a background iwl_commit_rxon work.
1323          */
1324
1325         *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
1326                         FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
1327 }
1328 EXPORT_SYMBOL(iwl_configure_filter);
1329
1330 int iwl_set_hw_params(struct iwl_priv *priv)
1331 {
1332         priv->hw_params.max_rxq_size = RX_QUEUE_SIZE;
1333         priv->hw_params.max_rxq_log = RX_QUEUE_SIZE_LOG;
1334         if (priv->cfg->mod_params->amsdu_size_8K)
1335                 priv->hw_params.rx_page_order = get_order(IWL_RX_BUF_SIZE_8K);
1336         else
1337                 priv->hw_params.rx_page_order = get_order(IWL_RX_BUF_SIZE_4K);
1338
1339         priv->hw_params.max_beacon_itrvl = IWL_MAX_UCODE_BEACON_INTERVAL;
1340
1341         if (priv->cfg->mod_params->disable_11n)
1342                 priv->cfg->sku &= ~IWL_SKU_N;
1343
1344         /* Device-specific setup */
1345         return priv->cfg->ops->lib->set_hw_params(priv);
1346 }
1347 EXPORT_SYMBOL(iwl_set_hw_params);
1348
1349 int iwl_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force)
1350 {
1351         int ret = 0;
1352         s8 prev_tx_power = priv->tx_power_user_lmt;
1353
1354         if (tx_power < IWLAGN_TX_POWER_TARGET_POWER_MIN) {
1355                 IWL_WARN(priv,
1356                          "Requested user TXPOWER %d below lower limit %d.\n",
1357                          tx_power,
1358                          IWLAGN_TX_POWER_TARGET_POWER_MIN);
1359                 return -EINVAL;
1360         }
1361
1362         if (tx_power > priv->tx_power_device_lmt) {
1363                 IWL_WARN(priv,
1364                         "Requested user TXPOWER %d above upper limit %d.\n",
1365                          tx_power, priv->tx_power_device_lmt);
1366                 return -EINVAL;
1367         }
1368
1369         if (priv->tx_power_user_lmt != tx_power)
1370                 force = true;
1371
1372         /* if nic is not up don't send command */
1373         if (iwl_is_ready_rf(priv)) {
1374                 priv->tx_power_user_lmt = tx_power;
1375                 if (force && priv->cfg->ops->lib->send_tx_power)
1376                         ret = priv->cfg->ops->lib->send_tx_power(priv);
1377                 else if (!priv->cfg->ops->lib->send_tx_power)
1378                         ret = -EOPNOTSUPP;
1379                 /*
1380                  * if fail to set tx_power, restore the orig. tx power
1381                  */
1382                 if (ret)
1383                         priv->tx_power_user_lmt = prev_tx_power;
1384         }
1385
1386         /*
1387          * Even this is an async host command, the command
1388          * will always report success from uCode
1389          * So once driver can placing the command into the queue
1390          * successfully, driver can use priv->tx_power_user_lmt
1391          * to reflect the current tx power
1392          */
1393         return ret;
1394 }
1395 EXPORT_SYMBOL(iwl_set_tx_power);
1396
1397 irqreturn_t iwl_isr_legacy(int irq, void *data)
1398 {
1399         struct iwl_priv *priv = data;
1400         u32 inta, inta_mask;
1401         u32 inta_fh;
1402         unsigned long flags;
1403         if (!priv)
1404                 return IRQ_NONE;
1405
1406         spin_lock_irqsave(&priv->lock, flags);
1407
1408         /* Disable (but don't clear!) interrupts here to avoid
1409          *    back-to-back ISRs and sporadic interrupts from our NIC.
1410          * If we have something to service, the tasklet will re-enable ints.
1411          * If we *don't* have something, we'll re-enable before leaving here. */
1412         inta_mask = iwl_read32(priv, CSR_INT_MASK);  /* just for debug */
1413         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
1414
1415         /* Discover which interrupts are active/pending */
1416         inta = iwl_read32(priv, CSR_INT);
1417         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1418
1419         /* Ignore interrupt if there's nothing in NIC to service.
1420          * This may be due to IRQ shared with another device,
1421          * or due to sporadic interrupts thrown from our NIC. */
1422         if (!inta && !inta_fh) {
1423                 IWL_DEBUG_ISR(priv, "Ignore interrupt, inta == 0, inta_fh == 0\n");
1424                 goto none;
1425         }
1426
1427         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
1428                 /* Hardware disappeared. It might have already raised
1429                  * an interrupt */
1430                 IWL_WARN(priv, "HARDWARE GONE?? INTA == 0x%08x\n", inta);
1431                 goto unplugged;
1432         }
1433
1434         IWL_DEBUG_ISR(priv, "ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1435                       inta, inta_mask, inta_fh);
1436
1437         inta &= ~CSR_INT_BIT_SCD;
1438
1439         /* iwl_irq_tasklet() will service interrupts and re-enable them */
1440         if (likely(inta || inta_fh))
1441                 tasklet_schedule(&priv->irq_tasklet);
1442
1443  unplugged:
1444         spin_unlock_irqrestore(&priv->lock, flags);
1445         return IRQ_HANDLED;
1446
1447  none:
1448         /* re-enable interrupts here since we don't have anything to service. */
1449         /* only Re-enable if diabled by irq */
1450         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1451                 iwl_enable_interrupts(priv);
1452         spin_unlock_irqrestore(&priv->lock, flags);
1453         return IRQ_NONE;
1454 }
1455 EXPORT_SYMBOL(iwl_isr_legacy);
1456
1457 void iwl_send_bt_config(struct iwl_priv *priv)
1458 {
1459         struct iwl_bt_cmd bt_cmd = {
1460                 .lead_time = BT_LEAD_TIME_DEF,
1461                 .max_kill = BT_MAX_KILL_DEF,
1462                 .kill_ack_mask = 0,
1463                 .kill_cts_mask = 0,
1464         };
1465
1466         if (!bt_coex_active)
1467                 bt_cmd.flags = BT_COEX_DISABLE;
1468         else
1469                 bt_cmd.flags = BT_COEX_ENABLE;
1470
1471         IWL_DEBUG_INFO(priv, "BT coex %s\n",
1472                 (bt_cmd.flags == BT_COEX_DISABLE) ? "disable" : "active");
1473
1474         if (iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG,
1475                              sizeof(struct iwl_bt_cmd), &bt_cmd))
1476                 IWL_ERR(priv, "failed to send BT Coex Config\n");
1477 }
1478 EXPORT_SYMBOL(iwl_send_bt_config);
1479
1480 int iwl_send_statistics_request(struct iwl_priv *priv, u8 flags, bool clear)
1481 {
1482         struct iwl_statistics_cmd statistics_cmd = {
1483                 .configuration_flags =
1484                         clear ? IWL_STATS_CONF_CLEAR_STATS : 0,
1485         };
1486
1487         if (flags & CMD_ASYNC)
1488                 return iwl_send_cmd_pdu_async(priv, REPLY_STATISTICS_CMD,
1489                                                sizeof(struct iwl_statistics_cmd),
1490                                                &statistics_cmd, NULL);
1491         else
1492                 return iwl_send_cmd_pdu(priv, REPLY_STATISTICS_CMD,
1493                                         sizeof(struct iwl_statistics_cmd),
1494                                         &statistics_cmd);
1495 }
1496 EXPORT_SYMBOL(iwl_send_statistics_request);
1497
1498 /**
1499  * iwl_verify_inst_sparse - verify runtime uCode image in card vs. host,
1500  *   using sample data 100 bytes apart.  If these sample points are good,
1501  *   it's a pretty good bet that everything between them is good, too.
1502  */
1503 static int iwlcore_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
1504 {
1505         u32 val;
1506         int ret = 0;
1507         u32 errcnt = 0;
1508         u32 i;
1509
1510         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
1511
1512         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
1513                 /* read data comes through single port, auto-incr addr */
1514                 /* NOTE: Use the debugless read so we don't flood kernel log
1515                  * if IWL_DL_IO is set */
1516                 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
1517                         i + IWL49_RTC_INST_LOWER_BOUND);
1518                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1519                 if (val != le32_to_cpu(*image)) {
1520                         ret = -EIO;
1521                         errcnt++;
1522                         if (errcnt >= 3)
1523                                 break;
1524                 }
1525         }
1526
1527         return ret;
1528 }
1529
1530 /**
1531  * iwlcore_verify_inst_full - verify runtime uCode image in card vs. host,
1532  *     looking at all data.
1533  */
1534 static int iwl_verify_inst_full(struct iwl_priv *priv, __le32 *image,
1535                                  u32 len)
1536 {
1537         u32 val;
1538         u32 save_len = len;
1539         int ret = 0;
1540         u32 errcnt;
1541
1542         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
1543
1544         iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
1545                            IWL49_RTC_INST_LOWER_BOUND);
1546
1547         errcnt = 0;
1548         for (; len > 0; len -= sizeof(u32), image++) {
1549                 /* read data comes through single port, auto-incr addr */
1550                 /* NOTE: Use the debugless read so we don't flood kernel log
1551                  * if IWL_DL_IO is set */
1552                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1553                 if (val != le32_to_cpu(*image)) {
1554                         IWL_ERR(priv, "uCode INST section is invalid at "
1555                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
1556                                   save_len - len, val, le32_to_cpu(*image));
1557                         ret = -EIO;
1558                         errcnt++;
1559                         if (errcnt >= 20)
1560                                 break;
1561                 }
1562         }
1563
1564         if (!errcnt)
1565                 IWL_DEBUG_INFO(priv,
1566                     "ucode image in INSTRUCTION memory is good\n");
1567
1568         return ret;
1569 }
1570
1571 /**
1572  * iwl_verify_ucode - determine which instruction image is in SRAM,
1573  *    and verify its contents
1574  */
1575 int iwl_verify_ucode(struct iwl_priv *priv)
1576 {
1577         __le32 *image;
1578         u32 len;
1579         int ret;
1580
1581         /* Try bootstrap */
1582         image = (__le32 *)priv->ucode_boot.v_addr;
1583         len = priv->ucode_boot.len;
1584         ret = iwlcore_verify_inst_sparse(priv, image, len);
1585         if (!ret) {
1586                 IWL_DEBUG_INFO(priv, "Bootstrap uCode is good in inst SRAM\n");
1587                 return 0;
1588         }
1589
1590         /* Try initialize */
1591         image = (__le32 *)priv->ucode_init.v_addr;
1592         len = priv->ucode_init.len;
1593         ret = iwlcore_verify_inst_sparse(priv, image, len);
1594         if (!ret) {
1595                 IWL_DEBUG_INFO(priv, "Initialize uCode is good in inst SRAM\n");
1596                 return 0;
1597         }
1598
1599         /* Try runtime/protocol */
1600         image = (__le32 *)priv->ucode_code.v_addr;
1601         len = priv->ucode_code.len;
1602         ret = iwlcore_verify_inst_sparse(priv, image, len);
1603         if (!ret) {
1604                 IWL_DEBUG_INFO(priv, "Runtime uCode is good in inst SRAM\n");
1605                 return 0;
1606         }
1607
1608         IWL_ERR(priv, "NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
1609
1610         /* Since nothing seems to match, show first several data entries in
1611          * instruction SRAM, so maybe visual inspection will give a clue.
1612          * Selection of bootstrap image (vs. other images) is arbitrary. */
1613         image = (__le32 *)priv->ucode_boot.v_addr;
1614         len = priv->ucode_boot.len;
1615         ret = iwl_verify_inst_full(priv, image, len);
1616
1617         return ret;
1618 }
1619 EXPORT_SYMBOL(iwl_verify_ucode);
1620
1621
1622 void iwl_rf_kill_ct_config(struct iwl_priv *priv)
1623 {
1624         struct iwl_ct_kill_config cmd;
1625         struct iwl_ct_kill_throttling_config adv_cmd;
1626         unsigned long flags;
1627         int ret = 0;
1628
1629         spin_lock_irqsave(&priv->lock, flags);
1630         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
1631                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
1632         spin_unlock_irqrestore(&priv->lock, flags);
1633         priv->thermal_throttle.ct_kill_toggle = false;
1634
1635         if (priv->cfg->support_ct_kill_exit) {
1636                 adv_cmd.critical_temperature_enter =
1637                         cpu_to_le32(priv->hw_params.ct_kill_threshold);
1638                 adv_cmd.critical_temperature_exit =
1639                         cpu_to_le32(priv->hw_params.ct_kill_exit_threshold);
1640
1641                 ret = iwl_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD,
1642                                        sizeof(adv_cmd), &adv_cmd);
1643                 if (ret)
1644                         IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
1645                 else
1646                         IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
1647                                         "succeeded, "
1648                                         "critical temperature enter is %d,"
1649                                         "exit is %d\n",
1650                                        priv->hw_params.ct_kill_threshold,
1651                                        priv->hw_params.ct_kill_exit_threshold);
1652         } else {
1653                 cmd.critical_temperature_R =
1654                         cpu_to_le32(priv->hw_params.ct_kill_threshold);
1655
1656                 ret = iwl_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD,
1657                                        sizeof(cmd), &cmd);
1658                 if (ret)
1659                         IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
1660                 else
1661                         IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
1662                                         "succeeded, "
1663                                         "critical temperature is %d\n",
1664                                         priv->hw_params.ct_kill_threshold);
1665         }
1666 }
1667 EXPORT_SYMBOL(iwl_rf_kill_ct_config);
1668
1669
1670 /*
1671  * CARD_STATE_CMD
1672  *
1673  * Use: Sets the device's internal card state to enable, disable, or halt
1674  *
1675  * When in the 'enable' state the card operates as normal.
1676  * When in the 'disable' state, the card enters into a low power mode.
1677  * When in the 'halt' state, the card is shut down and must be fully
1678  * restarted to come back on.
1679  */
1680 int iwl_send_card_state(struct iwl_priv *priv, u32 flags, u8 meta_flag)
1681 {
1682         struct iwl_host_cmd cmd = {
1683                 .id = REPLY_CARD_STATE_CMD,
1684                 .len = sizeof(u32),
1685                 .data = &flags,
1686                 .flags = meta_flag,
1687         };
1688
1689         return iwl_send_cmd(priv, &cmd);
1690 }
1691
1692 void iwl_rx_pm_sleep_notif(struct iwl_priv *priv,
1693                            struct iwl_rx_mem_buffer *rxb)
1694 {
1695 #ifdef CONFIG_IWLWIFI_DEBUG
1696         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1697         struct iwl_sleep_notification *sleep = &(pkt->u.sleep_notif);
1698         IWL_DEBUG_RX(priv, "sleep mode: %d, src: %d\n",
1699                      sleep->pm_sleep_mode, sleep->pm_wakeup_src);
1700 #endif
1701 }
1702 EXPORT_SYMBOL(iwl_rx_pm_sleep_notif);
1703
1704 void iwl_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
1705                                       struct iwl_rx_mem_buffer *rxb)
1706 {
1707         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1708         u32 len = le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
1709         IWL_DEBUG_RADIO(priv, "Dumping %d bytes of unhandled "
1710                         "notification for %s:\n", len,
1711                         get_cmd_string(pkt->hdr.cmd));
1712         iwl_print_hex_dump(priv, IWL_DL_RADIO, pkt->u.raw, len);
1713 }
1714 EXPORT_SYMBOL(iwl_rx_pm_debug_statistics_notif);
1715
1716 void iwl_rx_reply_error(struct iwl_priv *priv,
1717                         struct iwl_rx_mem_buffer *rxb)
1718 {
1719         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1720
1721         IWL_ERR(priv, "Error Reply type 0x%08X cmd %s (0x%02X) "
1722                 "seq 0x%04X ser 0x%08X\n",
1723                 le32_to_cpu(pkt->u.err_resp.error_type),
1724                 get_cmd_string(pkt->u.err_resp.cmd_id),
1725                 pkt->u.err_resp.cmd_id,
1726                 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
1727                 le32_to_cpu(pkt->u.err_resp.error_info));
1728 }
1729 EXPORT_SYMBOL(iwl_rx_reply_error);
1730
1731 void iwl_clear_isr_stats(struct iwl_priv *priv)
1732 {
1733         memset(&priv->isr_stats, 0, sizeof(priv->isr_stats));
1734 }
1735
1736 int iwl_mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
1737                            const struct ieee80211_tx_queue_params *params)
1738 {
1739         struct iwl_priv *priv = hw->priv;
1740         unsigned long flags;
1741         int q;
1742
1743         IWL_DEBUG_MAC80211(priv, "enter\n");
1744
1745         if (!iwl_is_ready_rf(priv)) {
1746                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1747                 return -EIO;
1748         }
1749
1750         if (queue >= AC_NUM) {
1751                 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1752                 return 0;
1753         }
1754
1755         q = AC_NUM - 1 - queue;
1756
1757         spin_lock_irqsave(&priv->lock, flags);
1758
1759         priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
1760         priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
1761         priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1762         priv->qos_data.def_qos_parm.ac[q].edca_txop =
1763                         cpu_to_le16((params->txop * 32));
1764
1765         priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1766
1767         spin_unlock_irqrestore(&priv->lock, flags);
1768
1769         IWL_DEBUG_MAC80211(priv, "leave\n");
1770         return 0;
1771 }
1772 EXPORT_SYMBOL(iwl_mac_conf_tx);
1773
1774 static void iwl_ht_conf(struct iwl_priv *priv,
1775                         struct ieee80211_bss_conf *bss_conf)
1776 {
1777         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
1778         struct ieee80211_sta *sta;
1779
1780         IWL_DEBUG_MAC80211(priv, "enter:\n");
1781
1782         if (!ht_conf->is_ht)
1783                 return;
1784
1785         ht_conf->ht_protection =
1786                 bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_PROTECTION;
1787         ht_conf->non_GF_STA_present =
1788                 !!(bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
1789
1790         ht_conf->single_chain_sufficient = false;
1791
1792         switch (priv->iw_mode) {
1793         case NL80211_IFTYPE_STATION:
1794                 rcu_read_lock();
1795                 sta = ieee80211_find_sta(priv->vif, priv->bssid);
1796                 if (sta) {
1797                         struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
1798                         int maxstreams;
1799
1800                         maxstreams = (ht_cap->mcs.tx_params &
1801                                       IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK)
1802                                         >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
1803                         maxstreams += 1;
1804
1805                         if ((ht_cap->mcs.rx_mask[1] == 0) &&
1806                             (ht_cap->mcs.rx_mask[2] == 0))
1807                                 ht_conf->single_chain_sufficient = true;
1808                         if (maxstreams <= 1)
1809                                 ht_conf->single_chain_sufficient = true;
1810                 } else {
1811                         /*
1812                          * If at all, this can only happen through a race
1813                          * when the AP disconnects us while we're still
1814                          * setting up the connection, in that case mac80211
1815                          * will soon tell us about that.
1816                          */
1817                         ht_conf->single_chain_sufficient = true;
1818                 }
1819                 rcu_read_unlock();
1820                 break;
1821         case NL80211_IFTYPE_ADHOC:
1822                 ht_conf->single_chain_sufficient = true;
1823                 break;
1824         default:
1825                 break;
1826         }
1827
1828         IWL_DEBUG_MAC80211(priv, "leave\n");
1829 }
1830
1831 static inline void iwl_set_no_assoc(struct iwl_priv *priv)
1832 {
1833         priv->assoc_id = 0;
1834         iwl_led_disassociate(priv);
1835         /*
1836          * inform the ucode that there is no longer an
1837          * association and that no more packets should be
1838          * sent
1839          */
1840         priv->staging_rxon.filter_flags &=
1841                 ~RXON_FILTER_ASSOC_MSK;
1842         priv->staging_rxon.assoc_id = 0;
1843         iwlcore_commit_rxon(priv);
1844 }
1845
1846 void iwl_bss_info_changed(struct ieee80211_hw *hw,
1847                           struct ieee80211_vif *vif,
1848                           struct ieee80211_bss_conf *bss_conf,
1849                           u32 changes)
1850 {
1851         struct iwl_priv *priv = hw->priv;
1852         int ret;
1853
1854         IWL_DEBUG_MAC80211(priv, "changes = 0x%X\n", changes);
1855
1856         if (!iwl_is_alive(priv))
1857                 return;
1858
1859         mutex_lock(&priv->mutex);
1860
1861         if (changes & BSS_CHANGED_BEACON &&
1862             priv->iw_mode == NL80211_IFTYPE_AP) {
1863                 dev_kfree_skb(priv->ibss_beacon);
1864                 priv->ibss_beacon = ieee80211_beacon_get(hw, vif);
1865         }
1866
1867         if (changes & BSS_CHANGED_BEACON_INT) {
1868                 priv->beacon_int = bss_conf->beacon_int;
1869                 /* TODO: in AP mode, do something to make this take effect */
1870         }
1871
1872         if (changes & BSS_CHANGED_BSSID) {
1873                 IWL_DEBUG_MAC80211(priv, "BSSID %pM\n", bss_conf->bssid);
1874
1875                 /*
1876                  * If there is currently a HW scan going on in the
1877                  * background then we need to cancel it else the RXON
1878                  * below/in post_associate will fail.
1879                  */
1880                 if (iwl_scan_cancel_timeout(priv, 100)) {
1881                         IWL_WARN(priv, "Aborted scan still in progress after 100ms\n");
1882                         IWL_DEBUG_MAC80211(priv, "leaving - scan abort failed.\n");
1883                         mutex_unlock(&priv->mutex);
1884                         return;
1885                 }
1886
1887                 /* mac80211 only sets assoc when in STATION mode */
1888                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC ||
1889                     bss_conf->assoc) {
1890                         memcpy(priv->staging_rxon.bssid_addr,
1891                                bss_conf->bssid, ETH_ALEN);
1892
1893                         /* currently needed in a few places */
1894                         memcpy(priv->bssid, bss_conf->bssid, ETH_ALEN);
1895                 } else {
1896                         priv->staging_rxon.filter_flags &=
1897                                 ~RXON_FILTER_ASSOC_MSK;
1898                 }
1899
1900         }
1901
1902         /*
1903          * This needs to be after setting the BSSID in case
1904          * mac80211 decides to do both changes at once because
1905          * it will invoke post_associate.
1906          */
1907         if (priv->iw_mode == NL80211_IFTYPE_ADHOC &&
1908             changes & BSS_CHANGED_BEACON) {
1909                 struct sk_buff *beacon = ieee80211_beacon_get(hw, vif);
1910
1911                 if (beacon)
1912                         iwl_mac_beacon_update(hw, beacon);
1913         }
1914
1915         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
1916                 IWL_DEBUG_MAC80211(priv, "ERP_PREAMBLE %d\n",
1917                                    bss_conf->use_short_preamble);
1918                 if (bss_conf->use_short_preamble)
1919                         priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
1920                 else
1921                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
1922         }
1923
1924         if (changes & BSS_CHANGED_ERP_CTS_PROT) {
1925                 IWL_DEBUG_MAC80211(priv, "ERP_CTS %d\n", bss_conf->use_cts_prot);
1926                 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
1927                         priv->staging_rxon.flags |= RXON_FLG_TGG_PROTECT_MSK;
1928                 else
1929                         priv->staging_rxon.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
1930         }
1931
1932         if (changes & BSS_CHANGED_BASIC_RATES) {
1933                 /* XXX use this information
1934                  *
1935                  * To do that, remove code from iwl_set_rate() and put something
1936                  * like this here:
1937                  *
1938                 if (A-band)
1939                         priv->staging_rxon.ofdm_basic_rates =
1940                                 bss_conf->basic_rates;
1941                 else
1942                         priv->staging_rxon.ofdm_basic_rates =
1943                                 bss_conf->basic_rates >> 4;
1944                         priv->staging_rxon.cck_basic_rates =
1945                                 bss_conf->basic_rates & 0xF;
1946                  */
1947         }
1948
1949         if (changes & BSS_CHANGED_HT) {
1950                 iwl_ht_conf(priv, bss_conf);
1951
1952                 if (priv->cfg->ops->hcmd->set_rxon_chain)
1953                         priv->cfg->ops->hcmd->set_rxon_chain(priv);
1954         }
1955
1956         if (changes & BSS_CHANGED_ASSOC) {
1957                 IWL_DEBUG_MAC80211(priv, "ASSOC %d\n", bss_conf->assoc);
1958                 if (bss_conf->assoc) {
1959                         priv->assoc_id = bss_conf->aid;
1960                         priv->beacon_int = bss_conf->beacon_int;
1961                         priv->timestamp = bss_conf->timestamp;
1962                         priv->assoc_capability = bss_conf->assoc_capability;
1963
1964                         iwl_led_associate(priv);
1965
1966                         if (!iwl_is_rfkill(priv))
1967                                 priv->cfg->ops->lib->post_associate(priv);
1968                 } else
1969                         iwl_set_no_assoc(priv);
1970         }
1971
1972         if (changes && iwl_is_associated(priv) && priv->assoc_id) {
1973                 IWL_DEBUG_MAC80211(priv, "Changes (%#x) while associated\n",
1974                                    changes);
1975                 ret = iwl_send_rxon_assoc(priv);
1976                 if (!ret) {
1977                         /* Sync active_rxon with latest change. */
1978                         memcpy((void *)&priv->active_rxon,
1979                                 &priv->staging_rxon,
1980                                 sizeof(struct iwl_rxon_cmd));
1981                 }
1982         }
1983
1984         if (changes & BSS_CHANGED_BEACON_ENABLED) {
1985                 if (vif->bss_conf.enable_beacon) {
1986                         memcpy(priv->staging_rxon.bssid_addr,
1987                                bss_conf->bssid, ETH_ALEN);
1988                         memcpy(priv->bssid, bss_conf->bssid, ETH_ALEN);
1989                         iwlcore_config_ap(priv);
1990                 } else
1991                         iwl_set_no_assoc(priv);
1992         }
1993
1994         mutex_unlock(&priv->mutex);
1995
1996         IWL_DEBUG_MAC80211(priv, "leave\n");
1997 }
1998 EXPORT_SYMBOL(iwl_bss_info_changed);
1999
2000 int iwl_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb)
2001 {
2002         struct iwl_priv *priv = hw->priv;
2003         unsigned long flags;
2004         __le64 timestamp;
2005
2006         IWL_DEBUG_MAC80211(priv, "enter\n");
2007
2008         if (!iwl_is_ready_rf(priv)) {
2009                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
2010                 return -EIO;
2011         }
2012
2013         spin_lock_irqsave(&priv->lock, flags);
2014
2015         if (priv->ibss_beacon)
2016                 dev_kfree_skb(priv->ibss_beacon);
2017
2018         priv->ibss_beacon = skb;
2019
2020         priv->assoc_id = 0;
2021         timestamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
2022         priv->timestamp = le64_to_cpu(timestamp);
2023
2024         IWL_DEBUG_MAC80211(priv, "leave\n");
2025         spin_unlock_irqrestore(&priv->lock, flags);
2026
2027         priv->cfg->ops->lib->post_associate(priv);
2028
2029         return 0;
2030 }
2031 EXPORT_SYMBOL(iwl_mac_beacon_update);
2032
2033 static int iwl_set_mode(struct iwl_priv *priv, struct ieee80211_vif *vif)
2034 {
2035         iwl_connection_init_rx_config(priv, vif->type);
2036
2037         if (priv->cfg->ops->hcmd->set_rxon_chain)
2038                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
2039
2040         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2041
2042         return iwlcore_commit_rxon(priv);
2043 }
2044
2045 int iwl_mac_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
2046 {
2047         struct iwl_priv *priv = hw->priv;
2048         int err = 0;
2049
2050         IWL_DEBUG_MAC80211(priv, "enter: type %d\n", vif->type);
2051
2052         mutex_lock(&priv->mutex);
2053
2054         if (WARN_ON(!iwl_is_ready_rf(priv))) {
2055                 err = -EINVAL;
2056                 goto out;
2057         }
2058
2059         if (priv->vif) {
2060                 IWL_DEBUG_MAC80211(priv, "leave - vif != NULL\n");
2061                 err = -EOPNOTSUPP;
2062                 goto out;
2063         }
2064
2065         priv->vif = vif;
2066         priv->iw_mode = vif->type;
2067
2068         IWL_DEBUG_MAC80211(priv, "Set %pM\n", vif->addr);
2069         memcpy(priv->mac_addr, vif->addr, ETH_ALEN);
2070
2071         err = iwl_set_mode(priv, vif);
2072         if (err)
2073                 goto out_err;
2074
2075         /* Add the broadcast address so we can send broadcast frames */
2076         priv->cfg->ops->lib->add_bcast_station(priv);
2077
2078         goto out;
2079
2080  out_err:
2081         priv->vif = NULL;
2082         priv->iw_mode = NL80211_IFTYPE_STATION;
2083  out:
2084         mutex_unlock(&priv->mutex);
2085
2086         IWL_DEBUG_MAC80211(priv, "leave\n");
2087         return err;
2088 }
2089 EXPORT_SYMBOL(iwl_mac_add_interface);
2090
2091 void iwl_mac_remove_interface(struct ieee80211_hw *hw,
2092                               struct ieee80211_vif *vif)
2093 {
2094         struct iwl_priv *priv = hw->priv;
2095
2096         IWL_DEBUG_MAC80211(priv, "enter\n");
2097
2098         mutex_lock(&priv->mutex);
2099
2100         iwl_clear_ucode_stations(priv, true);
2101
2102         if (iwl_is_ready_rf(priv)) {
2103                 iwl_scan_cancel_timeout(priv, 100);
2104                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2105                 iwlcore_commit_rxon(priv);
2106         }
2107         if (priv->vif == vif) {
2108                 priv->vif = NULL;
2109                 memset(priv->bssid, 0, ETH_ALEN);
2110         }
2111         mutex_unlock(&priv->mutex);
2112
2113         IWL_DEBUG_MAC80211(priv, "leave\n");
2114
2115 }
2116 EXPORT_SYMBOL(iwl_mac_remove_interface);
2117
2118 /**
2119  * iwl_mac_config - mac80211 config callback
2120  *
2121  * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
2122  * be set inappropriately and the driver currently sets the hardware up to
2123  * use it whenever needed.
2124  */
2125 int iwl_mac_config(struct ieee80211_hw *hw, u32 changed)
2126 {
2127         struct iwl_priv *priv = hw->priv;
2128         const struct iwl_channel_info *ch_info;
2129         struct ieee80211_conf *conf = &hw->conf;
2130         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
2131         unsigned long flags = 0;
2132         int ret = 0;
2133         u16 ch;
2134         int scan_active = 0;
2135
2136         mutex_lock(&priv->mutex);
2137
2138         IWL_DEBUG_MAC80211(priv, "enter to channel %d changed 0x%X\n",
2139                                         conf->channel->hw_value, changed);
2140
2141         if (unlikely(!priv->cfg->mod_params->disable_hw_scan &&
2142                         test_bit(STATUS_SCANNING, &priv->status))) {
2143                 scan_active = 1;
2144                 IWL_DEBUG_MAC80211(priv, "leave - scanning\n");
2145         }
2146
2147         if (changed & (IEEE80211_CONF_CHANGE_SMPS |
2148                        IEEE80211_CONF_CHANGE_CHANNEL)) {
2149                 /* mac80211 uses static for non-HT which is what we want */
2150                 priv->current_ht_config.smps = conf->smps_mode;
2151
2152                 /*
2153                  * Recalculate chain counts.
2154                  *
2155                  * If monitor mode is enabled then mac80211 will
2156                  * set up the SM PS mode to OFF if an HT channel is
2157                  * configured.
2158                  */
2159                 if (priv->cfg->ops->hcmd->set_rxon_chain)
2160                         priv->cfg->ops->hcmd->set_rxon_chain(priv);
2161         }
2162
2163         /* during scanning mac80211 will delay channel setting until
2164          * scan finish with changed = 0
2165          */
2166         if (!changed || (changed & IEEE80211_CONF_CHANGE_CHANNEL)) {
2167                 if (scan_active)
2168                         goto set_ch_out;
2169
2170                 ch = ieee80211_frequency_to_channel(conf->channel->center_freq);
2171                 ch_info = iwl_get_channel_info(priv, conf->channel->band, ch);
2172                 if (!is_channel_valid(ch_info)) {
2173                         IWL_DEBUG_MAC80211(priv, "leave - invalid channel\n");
2174                         ret = -EINVAL;
2175                         goto set_ch_out;
2176                 }
2177
2178                 spin_lock_irqsave(&priv->lock, flags);
2179
2180                 /* Configure HT40 channels */
2181                 ht_conf->is_ht = conf_is_ht(conf);
2182                 if (ht_conf->is_ht) {
2183                         if (conf_is_ht40_minus(conf)) {
2184                                 ht_conf->extension_chan_offset =
2185                                         IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2186                                 ht_conf->is_40mhz = true;
2187                         } else if (conf_is_ht40_plus(conf)) {
2188                                 ht_conf->extension_chan_offset =
2189                                         IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2190                                 ht_conf->is_40mhz = true;
2191                         } else {
2192                                 ht_conf->extension_chan_offset =
2193                                         IEEE80211_HT_PARAM_CHA_SEC_NONE;
2194                                 ht_conf->is_40mhz = false;
2195                         }
2196                 } else
2197                         ht_conf->is_40mhz = false;
2198                 /* Default to no protection. Protection mode will later be set
2199                  * from BSS config in iwl_ht_conf */
2200                 ht_conf->ht_protection = IEEE80211_HT_OP_MODE_PROTECTION_NONE;
2201
2202                 /* if we are switching from ht to 2.4 clear flags
2203                  * from any ht related info since 2.4 does not
2204                  * support ht */
2205                 if ((le16_to_cpu(priv->staging_rxon.channel) != ch))
2206                         priv->staging_rxon.flags = 0;
2207
2208                 iwl_set_rxon_channel(priv, conf->channel);
2209                 iwl_set_rxon_ht(priv, ht_conf);
2210
2211                 iwl_set_flags_for_band(priv, conf->channel->band);
2212                 spin_unlock_irqrestore(&priv->lock, flags);
2213                 if (iwl_is_associated(priv) &&
2214                     (le16_to_cpu(priv->active_rxon.channel) != ch) &&
2215                     priv->cfg->ops->lib->set_channel_switch) {
2216                         iwl_set_rate(priv);
2217                         /*
2218                          * at this point, staging_rxon has the
2219                          * configuration for channel switch
2220                          */
2221                         ret = priv->cfg->ops->lib->set_channel_switch(priv,
2222                                 ch);
2223                         if (!ret) {
2224                                 iwl_print_rx_config_cmd(priv);
2225                                 goto out;
2226                         }
2227                         priv->switch_rxon.switch_in_progress = false;
2228                 }
2229  set_ch_out:
2230                 /* The list of supported rates and rate mask can be different
2231                  * for each band; since the band may have changed, reset
2232                  * the rate mask to what mac80211 lists */
2233                 iwl_set_rate(priv);
2234         }
2235
2236         if (changed & (IEEE80211_CONF_CHANGE_PS |
2237                         IEEE80211_CONF_CHANGE_IDLE)) {
2238                 ret = iwl_power_update_mode(priv, false);
2239                 if (ret)
2240                         IWL_DEBUG_MAC80211(priv, "Error setting sleep level\n");
2241         }
2242
2243         if (changed & IEEE80211_CONF_CHANGE_POWER) {
2244                 IWL_DEBUG_MAC80211(priv, "TX Power old=%d new=%d\n",
2245                         priv->tx_power_user_lmt, conf->power_level);
2246
2247                 iwl_set_tx_power(priv, conf->power_level, false);
2248         }
2249
2250         if (changed & IEEE80211_CONF_CHANGE_QOS) {
2251                 bool qos_active = !!(conf->flags & IEEE80211_CONF_QOS);
2252
2253                 spin_lock_irqsave(&priv->lock, flags);
2254                 priv->qos_data.qos_active = qos_active;
2255                 iwl_update_qos(priv);
2256                 spin_unlock_irqrestore(&priv->lock, flags);
2257         }
2258
2259         if (!iwl_is_ready(priv)) {
2260                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2261                 goto out;
2262         }
2263
2264         if (scan_active)
2265                 goto out;
2266
2267         if (memcmp(&priv->active_rxon,
2268                    &priv->staging_rxon, sizeof(priv->staging_rxon)))
2269                 iwlcore_commit_rxon(priv);
2270         else
2271                 IWL_DEBUG_INFO(priv, "Not re-sending same RXON configuration.\n");
2272
2273
2274 out:
2275         IWL_DEBUG_MAC80211(priv, "leave\n");
2276         mutex_unlock(&priv->mutex);
2277         return ret;
2278 }
2279 EXPORT_SYMBOL(iwl_mac_config);
2280
2281 void iwl_mac_reset_tsf(struct ieee80211_hw *hw)
2282 {
2283         struct iwl_priv *priv = hw->priv;
2284         unsigned long flags;
2285
2286         mutex_lock(&priv->mutex);
2287         IWL_DEBUG_MAC80211(priv, "enter\n");
2288
2289         spin_lock_irqsave(&priv->lock, flags);
2290         memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_config));
2291         spin_unlock_irqrestore(&priv->lock, flags);
2292
2293         spin_lock_irqsave(&priv->lock, flags);
2294         priv->assoc_id = 0;
2295         priv->assoc_capability = 0;
2296
2297         /* new association get rid of ibss beacon skb */
2298         if (priv->ibss_beacon)
2299                 dev_kfree_skb(priv->ibss_beacon);
2300
2301         priv->ibss_beacon = NULL;
2302
2303         priv->beacon_int = priv->vif->bss_conf.beacon_int;
2304         priv->timestamp = 0;
2305
2306         spin_unlock_irqrestore(&priv->lock, flags);
2307
2308         if (!iwl_is_ready_rf(priv)) {
2309                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2310                 mutex_unlock(&priv->mutex);
2311                 return;
2312         }
2313
2314         /* we are restarting association process
2315          * clear RXON_FILTER_ASSOC_MSK bit
2316          */
2317         iwl_scan_cancel_timeout(priv, 100);
2318         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2319         iwlcore_commit_rxon(priv);
2320
2321         iwl_set_rate(priv);
2322
2323         mutex_unlock(&priv->mutex);
2324
2325         IWL_DEBUG_MAC80211(priv, "leave\n");
2326 }
2327 EXPORT_SYMBOL(iwl_mac_reset_tsf);
2328
2329 int iwl_alloc_txq_mem(struct iwl_priv *priv)
2330 {
2331         if (!priv->txq)
2332                 priv->txq = kzalloc(
2333                         sizeof(struct iwl_tx_queue) * priv->cfg->num_of_queues,
2334                         GFP_KERNEL);
2335         if (!priv->txq) {
2336                 IWL_ERR(priv, "Not enough memory for txq\n");
2337                 return -ENOMEM;
2338         }
2339         return 0;
2340 }
2341 EXPORT_SYMBOL(iwl_alloc_txq_mem);
2342
2343 void iwl_free_txq_mem(struct iwl_priv *priv)
2344 {
2345         kfree(priv->txq);
2346         priv->txq = NULL;
2347 }
2348 EXPORT_SYMBOL(iwl_free_txq_mem);
2349
2350 int iwl_send_wimax_coex(struct iwl_priv *priv)
2351 {
2352         struct iwl_wimax_coex_cmd coex_cmd;
2353
2354         if (priv->cfg->support_wimax_coexist) {
2355                 /* UnMask wake up src at associated sleep */
2356                 coex_cmd.flags = COEX_FLAGS_ASSOC_WA_UNMASK_MSK;
2357
2358                 /* UnMask wake up src at unassociated sleep */
2359                 coex_cmd.flags |= COEX_FLAGS_UNASSOC_WA_UNMASK_MSK;
2360                 memcpy(coex_cmd.sta_prio, cu_priorities,
2361                         sizeof(struct iwl_wimax_coex_event_entry) *
2362                          COEX_NUM_OF_EVENTS);
2363
2364                 /* enabling the coexistence feature */
2365                 coex_cmd.flags |= COEX_FLAGS_COEX_ENABLE_MSK;
2366
2367                 /* enabling the priorities tables */
2368                 coex_cmd.flags |= COEX_FLAGS_STA_TABLE_VALID_MSK;
2369         } else {
2370                 /* coexistence is disabled */
2371                 memset(&coex_cmd, 0, sizeof(coex_cmd));
2372         }
2373         return iwl_send_cmd_pdu(priv, COEX_PRIORITY_TABLE_CMD,
2374                                 sizeof(coex_cmd), &coex_cmd);
2375 }
2376 EXPORT_SYMBOL(iwl_send_wimax_coex);
2377
2378 #ifdef CONFIG_IWLWIFI_DEBUGFS
2379
2380 #define IWL_TRAFFIC_DUMP_SIZE   (IWL_TRAFFIC_ENTRY_SIZE * IWL_TRAFFIC_ENTRIES)
2381
2382 void iwl_reset_traffic_log(struct iwl_priv *priv)
2383 {
2384         priv->tx_traffic_idx = 0;
2385         priv->rx_traffic_idx = 0;
2386         if (priv->tx_traffic)
2387                 memset(priv->tx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
2388         if (priv->rx_traffic)
2389                 memset(priv->rx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
2390 }
2391
2392 int iwl_alloc_traffic_mem(struct iwl_priv *priv)
2393 {
2394         u32 traffic_size = IWL_TRAFFIC_DUMP_SIZE;
2395
2396         if (iwl_debug_level & IWL_DL_TX) {
2397                 if (!priv->tx_traffic) {
2398                         priv->tx_traffic =
2399                                 kzalloc(traffic_size, GFP_KERNEL);
2400                         if (!priv->tx_traffic)
2401                                 return -ENOMEM;
2402                 }
2403         }
2404         if (iwl_debug_level & IWL_DL_RX) {
2405                 if (!priv->rx_traffic) {
2406                         priv->rx_traffic =
2407                                 kzalloc(traffic_size, GFP_KERNEL);
2408                         if (!priv->rx_traffic)
2409                                 return -ENOMEM;
2410                 }
2411         }
2412         iwl_reset_traffic_log(priv);
2413         return 0;
2414 }
2415 EXPORT_SYMBOL(iwl_alloc_traffic_mem);
2416
2417 void iwl_free_traffic_mem(struct iwl_priv *priv)
2418 {
2419         kfree(priv->tx_traffic);
2420         priv->tx_traffic = NULL;
2421
2422         kfree(priv->rx_traffic);
2423         priv->rx_traffic = NULL;
2424 }
2425 EXPORT_SYMBOL(iwl_free_traffic_mem);
2426
2427 void iwl_dbg_log_tx_data_frame(struct iwl_priv *priv,
2428                       u16 length, struct ieee80211_hdr *header)
2429 {
2430         __le16 fc;
2431         u16 len;
2432
2433         if (likely(!(iwl_debug_level & IWL_DL_TX)))
2434                 return;
2435
2436         if (!priv->tx_traffic)
2437                 return;
2438
2439         fc = header->frame_control;
2440         if (ieee80211_is_data(fc)) {
2441                 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
2442                        ? IWL_TRAFFIC_ENTRY_SIZE : length;
2443                 memcpy((priv->tx_traffic +
2444                        (priv->tx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
2445                        header, len);
2446                 priv->tx_traffic_idx =
2447                         (priv->tx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
2448         }
2449 }
2450 EXPORT_SYMBOL(iwl_dbg_log_tx_data_frame);
2451
2452 void iwl_dbg_log_rx_data_frame(struct iwl_priv *priv,
2453                       u16 length, struct ieee80211_hdr *header)
2454 {
2455         __le16 fc;
2456         u16 len;
2457
2458         if (likely(!(iwl_debug_level & IWL_DL_RX)))
2459                 return;
2460
2461         if (!priv->rx_traffic)
2462                 return;
2463
2464         fc = header->frame_control;
2465         if (ieee80211_is_data(fc)) {
2466                 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
2467                        ? IWL_TRAFFIC_ENTRY_SIZE : length;
2468                 memcpy((priv->rx_traffic +
2469                        (priv->rx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
2470                        header, len);
2471                 priv->rx_traffic_idx =
2472                         (priv->rx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
2473         }
2474 }
2475 EXPORT_SYMBOL(iwl_dbg_log_rx_data_frame);
2476
2477 const char *get_mgmt_string(int cmd)
2478 {
2479         switch (cmd) {
2480                 IWL_CMD(MANAGEMENT_ASSOC_REQ);
2481                 IWL_CMD(MANAGEMENT_ASSOC_RESP);
2482                 IWL_CMD(MANAGEMENT_REASSOC_REQ);
2483                 IWL_CMD(MANAGEMENT_REASSOC_RESP);
2484                 IWL_CMD(MANAGEMENT_PROBE_REQ);
2485                 IWL_CMD(MANAGEMENT_PROBE_RESP);
2486                 IWL_CMD(MANAGEMENT_BEACON);
2487                 IWL_CMD(MANAGEMENT_ATIM);
2488                 IWL_CMD(MANAGEMENT_DISASSOC);
2489                 IWL_CMD(MANAGEMENT_AUTH);
2490                 IWL_CMD(MANAGEMENT_DEAUTH);
2491                 IWL_CMD(MANAGEMENT_ACTION);
2492         default:
2493                 return "UNKNOWN";
2494
2495         }
2496 }
2497
2498 const char *get_ctrl_string(int cmd)
2499 {
2500         switch (cmd) {
2501                 IWL_CMD(CONTROL_BACK_REQ);
2502                 IWL_CMD(CONTROL_BACK);
2503                 IWL_CMD(CONTROL_PSPOLL);
2504                 IWL_CMD(CONTROL_RTS);
2505                 IWL_CMD(CONTROL_CTS);
2506                 IWL_CMD(CONTROL_ACK);
2507                 IWL_CMD(CONTROL_CFEND);
2508                 IWL_CMD(CONTROL_CFENDACK);
2509         default:
2510                 return "UNKNOWN";
2511
2512         }
2513 }
2514
2515 void iwl_clear_traffic_stats(struct iwl_priv *priv)
2516 {
2517         memset(&priv->tx_stats, 0, sizeof(struct traffic_stats));
2518         memset(&priv->rx_stats, 0, sizeof(struct traffic_stats));
2519         priv->led_tpt = 0;
2520 }
2521
2522 /*
2523  * if CONFIG_IWLWIFI_DEBUGFS defined, iwl_update_stats function will
2524  * record all the MGMT, CTRL and DATA pkt for both TX and Rx pass.
2525  * Use debugFs to display the rx/rx_statistics
2526  * if CONFIG_IWLWIFI_DEBUGFS not being defined, then no MGMT and CTRL
2527  * information will be recorded, but DATA pkt still will be recorded
2528  * for the reason of iwl_led.c need to control the led blinking based on
2529  * number of tx and rx data.
2530  *
2531  */
2532 void iwl_update_stats(struct iwl_priv *priv, bool is_tx, __le16 fc, u16 len)
2533 {
2534         struct traffic_stats    *stats;
2535
2536         if (is_tx)
2537                 stats = &priv->tx_stats;
2538         else
2539                 stats = &priv->rx_stats;
2540
2541         if (ieee80211_is_mgmt(fc)) {
2542                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
2543                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
2544                         stats->mgmt[MANAGEMENT_ASSOC_REQ]++;
2545                         break;
2546                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP):
2547                         stats->mgmt[MANAGEMENT_ASSOC_RESP]++;
2548                         break;
2549                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
2550                         stats->mgmt[MANAGEMENT_REASSOC_REQ]++;
2551                         break;
2552                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP):
2553                         stats->mgmt[MANAGEMENT_REASSOC_RESP]++;
2554                         break;
2555                 case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ):
2556                         stats->mgmt[MANAGEMENT_PROBE_REQ]++;
2557                         break;
2558                 case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP):
2559                         stats->mgmt[MANAGEMENT_PROBE_RESP]++;
2560                         break;
2561                 case cpu_to_le16(IEEE80211_STYPE_BEACON):
2562                         stats->mgmt[MANAGEMENT_BEACON]++;
2563                         break;
2564                 case cpu_to_le16(IEEE80211_STYPE_ATIM):
2565                         stats->mgmt[MANAGEMENT_ATIM]++;
2566                         break;
2567                 case cpu_to_le16(IEEE80211_STYPE_DISASSOC):
2568                         stats->mgmt[MANAGEMENT_DISASSOC]++;
2569                         break;
2570                 case cpu_to_le16(IEEE80211_STYPE_AUTH):
2571                         stats->mgmt[MANAGEMENT_AUTH]++;
2572                         break;
2573                 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
2574                         stats->mgmt[MANAGEMENT_DEAUTH]++;
2575                         break;
2576                 case cpu_to_le16(IEEE80211_STYPE_ACTION):
2577                         stats->mgmt[MANAGEMENT_ACTION]++;
2578                         break;
2579                 }
2580         } else if (ieee80211_is_ctl(fc)) {
2581                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
2582                 case cpu_to_le16(IEEE80211_STYPE_BACK_REQ):
2583                         stats->ctrl[CONTROL_BACK_REQ]++;
2584                         break;
2585                 case cpu_to_le16(IEEE80211_STYPE_BACK):
2586                         stats->ctrl[CONTROL_BACK]++;
2587                         break;
2588                 case cpu_to_le16(IEEE80211_STYPE_PSPOLL):
2589                         stats->ctrl[CONTROL_PSPOLL]++;
2590                         break;
2591                 case cpu_to_le16(IEEE80211_STYPE_RTS):
2592                         stats->ctrl[CONTROL_RTS]++;
2593                         break;
2594                 case cpu_to_le16(IEEE80211_STYPE_CTS):
2595                         stats->ctrl[CONTROL_CTS]++;
2596                         break;
2597                 case cpu_to_le16(IEEE80211_STYPE_ACK):
2598                         stats->ctrl[CONTROL_ACK]++;
2599                         break;
2600                 case cpu_to_le16(IEEE80211_STYPE_CFEND):
2601                         stats->ctrl[CONTROL_CFEND]++;
2602                         break;
2603                 case cpu_to_le16(IEEE80211_STYPE_CFENDACK):
2604                         stats->ctrl[CONTROL_CFENDACK]++;
2605                         break;
2606                 }
2607         } else {
2608                 /* data */
2609                 stats->data_cnt++;
2610                 stats->data_bytes += len;
2611         }
2612         iwl_leds_background(priv);
2613 }
2614 EXPORT_SYMBOL(iwl_update_stats);
2615 #endif
2616
2617 const static char *get_csr_string(int cmd)
2618 {
2619         switch (cmd) {
2620                 IWL_CMD(CSR_HW_IF_CONFIG_REG);
2621                 IWL_CMD(CSR_INT_COALESCING);
2622                 IWL_CMD(CSR_INT);
2623                 IWL_CMD(CSR_INT_MASK);
2624                 IWL_CMD(CSR_FH_INT_STATUS);
2625                 IWL_CMD(CSR_GPIO_IN);
2626                 IWL_CMD(CSR_RESET);
2627                 IWL_CMD(CSR_GP_CNTRL);
2628                 IWL_CMD(CSR_HW_REV);
2629                 IWL_CMD(CSR_EEPROM_REG);
2630                 IWL_CMD(CSR_EEPROM_GP);
2631                 IWL_CMD(CSR_OTP_GP_REG);
2632                 IWL_CMD(CSR_GIO_REG);
2633                 IWL_CMD(CSR_GP_UCODE_REG);
2634                 IWL_CMD(CSR_GP_DRIVER_REG);
2635                 IWL_CMD(CSR_UCODE_DRV_GP1);
2636                 IWL_CMD(CSR_UCODE_DRV_GP2);
2637                 IWL_CMD(CSR_LED_REG);
2638                 IWL_CMD(CSR_DRAM_INT_TBL_REG);
2639                 IWL_CMD(CSR_GIO_CHICKEN_BITS);
2640                 IWL_CMD(CSR_ANA_PLL_CFG);
2641                 IWL_CMD(CSR_HW_REV_WA_REG);
2642                 IWL_CMD(CSR_DBG_HPET_MEM_REG);
2643         default:
2644                 return "UNKNOWN";
2645
2646         }
2647 }
2648
2649 void iwl_dump_csr(struct iwl_priv *priv)
2650 {
2651         int i;
2652         u32 csr_tbl[] = {
2653                 CSR_HW_IF_CONFIG_REG,
2654                 CSR_INT_COALESCING,
2655                 CSR_INT,
2656                 CSR_INT_MASK,
2657                 CSR_FH_INT_STATUS,
2658                 CSR_GPIO_IN,
2659                 CSR_RESET,
2660                 CSR_GP_CNTRL,
2661                 CSR_HW_REV,
2662                 CSR_EEPROM_REG,
2663                 CSR_EEPROM_GP,
2664                 CSR_OTP_GP_REG,
2665                 CSR_GIO_REG,
2666                 CSR_GP_UCODE_REG,
2667                 CSR_GP_DRIVER_REG,
2668                 CSR_UCODE_DRV_GP1,
2669                 CSR_UCODE_DRV_GP2,
2670                 CSR_LED_REG,
2671                 CSR_DRAM_INT_TBL_REG,
2672                 CSR_GIO_CHICKEN_BITS,
2673                 CSR_ANA_PLL_CFG,
2674                 CSR_HW_REV_WA_REG,
2675                 CSR_DBG_HPET_MEM_REG
2676         };
2677         IWL_ERR(priv, "CSR values:\n");
2678         IWL_ERR(priv, "(2nd byte of CSR_INT_COALESCING is "
2679                 "CSR_INT_PERIODIC_REG)\n");
2680         for (i = 0; i <  ARRAY_SIZE(csr_tbl); i++) {
2681                 IWL_ERR(priv, "  %25s: 0X%08x\n",
2682                         get_csr_string(csr_tbl[i]),
2683                         iwl_read32(priv, csr_tbl[i]));
2684         }
2685 }
2686 EXPORT_SYMBOL(iwl_dump_csr);
2687
2688 const static char *get_fh_string(int cmd)
2689 {
2690         switch (cmd) {
2691                 IWL_CMD(FH_RSCSR_CHNL0_STTS_WPTR_REG);
2692                 IWL_CMD(FH_RSCSR_CHNL0_RBDCB_BASE_REG);
2693                 IWL_CMD(FH_RSCSR_CHNL0_WPTR);
2694                 IWL_CMD(FH_MEM_RCSR_CHNL0_CONFIG_REG);
2695                 IWL_CMD(FH_MEM_RSSR_SHARED_CTRL_REG);
2696                 IWL_CMD(FH_MEM_RSSR_RX_STATUS_REG);
2697                 IWL_CMD(FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV);
2698                 IWL_CMD(FH_TSSR_TX_STATUS_REG);
2699                 IWL_CMD(FH_TSSR_TX_ERROR_REG);
2700         default:
2701                 return "UNKNOWN";
2702
2703         }
2704 }
2705
2706 int iwl_dump_fh(struct iwl_priv *priv, char **buf, bool display)
2707 {
2708         int i;
2709 #ifdef CONFIG_IWLWIFI_DEBUG
2710         int pos = 0;
2711         size_t bufsz = 0;
2712 #endif
2713         u32 fh_tbl[] = {
2714                 FH_RSCSR_CHNL0_STTS_WPTR_REG,
2715                 FH_RSCSR_CHNL0_RBDCB_BASE_REG,
2716                 FH_RSCSR_CHNL0_WPTR,
2717                 FH_MEM_RCSR_CHNL0_CONFIG_REG,
2718                 FH_MEM_RSSR_SHARED_CTRL_REG,
2719                 FH_MEM_RSSR_RX_STATUS_REG,
2720                 FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV,
2721                 FH_TSSR_TX_STATUS_REG,
2722                 FH_TSSR_TX_ERROR_REG
2723         };
2724 #ifdef CONFIG_IWLWIFI_DEBUG
2725         if (display) {
2726                 bufsz = ARRAY_SIZE(fh_tbl) * 48 + 40;
2727                 *buf = kmalloc(bufsz, GFP_KERNEL);
2728                 if (!*buf)
2729                         return -ENOMEM;
2730                 pos += scnprintf(*buf + pos, bufsz - pos,
2731                                 "FH register values:\n");
2732                 for (i = 0; i < ARRAY_SIZE(fh_tbl); i++) {
2733                         pos += scnprintf(*buf + pos, bufsz - pos,
2734                                 "  %34s: 0X%08x\n",
2735                                 get_fh_string(fh_tbl[i]),
2736                                 iwl_read_direct32(priv, fh_tbl[i]));
2737                 }
2738                 return pos;
2739         }
2740 #endif
2741         IWL_ERR(priv, "FH register values:\n");
2742         for (i = 0; i <  ARRAY_SIZE(fh_tbl); i++) {
2743                 IWL_ERR(priv, "  %34s: 0X%08x\n",
2744                         get_fh_string(fh_tbl[i]),
2745                         iwl_read_direct32(priv, fh_tbl[i]));
2746         }
2747         return 0;
2748 }
2749 EXPORT_SYMBOL(iwl_dump_fh);
2750
2751 static void iwl_force_rf_reset(struct iwl_priv *priv)
2752 {
2753         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2754                 return;
2755
2756         if (!iwl_is_associated(priv)) {
2757                 IWL_DEBUG_SCAN(priv, "force reset rejected: not associated\n");
2758                 return;
2759         }
2760         /*
2761          * There is no easy and better way to force reset the radio,
2762          * the only known method is switching channel which will force to
2763          * reset and tune the radio.
2764          * Use internal short scan (single channel) operation to should
2765          * achieve this objective.
2766          * Driver should reset the radio when number of consecutive missed
2767          * beacon, or any other uCode error condition detected.
2768          */
2769         IWL_DEBUG_INFO(priv, "perform radio reset.\n");
2770         iwl_internal_short_hw_scan(priv);
2771 }
2772
2773
2774 int iwl_force_reset(struct iwl_priv *priv, int mode)
2775 {
2776         struct iwl_force_reset *force_reset;
2777
2778         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2779                 return -EINVAL;
2780
2781         if (mode >= IWL_MAX_FORCE_RESET) {
2782                 IWL_DEBUG_INFO(priv, "invalid reset request.\n");
2783                 return -EINVAL;
2784         }
2785         force_reset = &priv->force_reset[mode];
2786         force_reset->reset_request_count++;
2787         if (force_reset->last_force_reset_jiffies &&
2788             time_after(force_reset->last_force_reset_jiffies +
2789             force_reset->reset_duration, jiffies)) {
2790                 IWL_DEBUG_INFO(priv, "force reset rejected\n");
2791                 force_reset->reset_reject_count++;
2792                 return -EAGAIN;
2793         }
2794         force_reset->reset_success_count++;
2795         force_reset->last_force_reset_jiffies = jiffies;
2796         IWL_DEBUG_INFO(priv, "perform force reset (%d)\n", mode);
2797         switch (mode) {
2798         case IWL_RF_RESET:
2799                 iwl_force_rf_reset(priv);
2800                 break;
2801         case IWL_FW_RESET:
2802                 IWL_ERR(priv, "On demand firmware reload\n");
2803                 /* Set the FW error flag -- cleared on iwl_down */
2804                 set_bit(STATUS_FW_ERROR, &priv->status);
2805                 wake_up_interruptible(&priv->wait_command_queue);
2806                 /*
2807                  * Keep the restart process from trying to send host
2808                  * commands by clearing the INIT status bit
2809                  */
2810                 clear_bit(STATUS_READY, &priv->status);
2811                 queue_work(priv->workqueue, &priv->restart);
2812                 break;
2813         }
2814         return 0;
2815 }
2816 EXPORT_SYMBOL(iwl_force_reset);
2817
2818 /**
2819  * iwl_bg_monitor_recover - Timer callback to check for stuck queue and recover
2820  *
2821  * During normal condition (no queue is stuck), the timer is continually set to
2822  * execute every monitor_recover_period milliseconds after the last timer
2823  * expired.  When the queue read_ptr is at the same place, the timer is
2824  * shorten to 100mSecs.  This is
2825  *      1) to reduce the chance that the read_ptr may wrap around (not stuck)
2826  *      2) to detect the stuck queues quicker before the station and AP can
2827  *      disassociate each other.
2828  *
2829  * This function monitors all the tx queues and recover from it if any
2830  * of the queues are stuck.
2831  * 1. It first check the cmd queue for stuck conditions.  If it is stuck,
2832  *      it will recover by resetting the firmware and return.
2833  * 2. Then, it checks for station association.  If it associates it will check
2834  *      other queues.  If any queue is stuck, it will recover by resetting
2835  *      the firmware.
2836  * Note: It the number of times the queue read_ptr to be at the same place to
2837  *      be MAX_REPEAT+1 in order to consider to be stuck.
2838  */
2839 /*
2840  * The maximum number of times the read pointer of the tx queue at the
2841  * same place without considering to be stuck.
2842  */
2843 #define MAX_REPEAT      (2)
2844 static int iwl_check_stuck_queue(struct iwl_priv *priv, int cnt)
2845 {
2846         struct iwl_tx_queue *txq;
2847         struct iwl_queue *q;
2848
2849         txq = &priv->txq[cnt];
2850         q = &txq->q;
2851         /* queue is empty, skip */
2852         if (q->read_ptr != q->write_ptr) {
2853                 if (q->read_ptr == q->last_read_ptr) {
2854                         /* a queue has not been read from last time */
2855                         if (q->repeat_same_read_ptr > MAX_REPEAT) {
2856                                 IWL_ERR(priv,
2857                                         "queue %d stuck %d time. Fw reload.\n",
2858                                         q->id, q->repeat_same_read_ptr);
2859                                 q->repeat_same_read_ptr = 0;
2860                                 iwl_force_reset(priv, IWL_FW_RESET);
2861                         } else {
2862                                 q->repeat_same_read_ptr++;
2863                                 IWL_DEBUG_RADIO(priv,
2864                                                 "queue %d, not read %d time\n",
2865                                                 q->id,
2866                                                 q->repeat_same_read_ptr);
2867                                 mod_timer(&priv->monitor_recover, jiffies +
2868                                         msecs_to_jiffies(IWL_ONE_HUNDRED_MSECS));
2869                         }
2870                         return 1;
2871                 } else {
2872                         q->last_read_ptr = q->read_ptr;
2873                         q->repeat_same_read_ptr = 0;
2874                 }
2875         }
2876         return 0;
2877 }
2878
2879 void iwl_bg_monitor_recover(unsigned long data)
2880 {
2881         struct iwl_priv *priv = (struct iwl_priv *)data;
2882         int cnt;
2883
2884         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2885                 return;
2886
2887         /* monitor and check for stuck cmd queue */
2888         if (iwl_check_stuck_queue(priv, IWL_CMD_QUEUE_NUM))
2889                 return;
2890
2891         /* monitor and check for other stuck queues */
2892         if (iwl_is_associated(priv)) {
2893                 for (cnt = 0; cnt < priv->hw_params.max_txq_num; cnt++) {
2894                         /* skip as we already checked the command queue */
2895                         if (cnt == IWL_CMD_QUEUE_NUM)
2896                                 continue;
2897                         if (iwl_check_stuck_queue(priv, cnt))
2898                                 return;
2899                 }
2900         }
2901         /*
2902          * Reschedule the timer to occur in
2903          * priv->cfg->monitor_recover_period
2904          */
2905         mod_timer(&priv->monitor_recover,
2906                 jiffies + msecs_to_jiffies(priv->cfg->monitor_recover_period));
2907 }
2908 EXPORT_SYMBOL(iwl_bg_monitor_recover);
2909
2910 #ifdef CONFIG_PM
2911
2912 int iwl_pci_suspend(struct pci_dev *pdev, pm_message_t state)
2913 {
2914         struct iwl_priv *priv = pci_get_drvdata(pdev);
2915
2916         /*
2917          * This function is called when system goes into suspend state
2918          * mac80211 will call iwl_mac_stop() from the mac80211 suspend function
2919          * first but since iwl_mac_stop() has no knowledge of who the caller is,
2920          * it will not call apm_ops.stop() to stop the DMA operation.
2921          * Calling apm_ops.stop here to make sure we stop the DMA.
2922          */
2923         priv->cfg->ops->lib->apm_ops.stop(priv);
2924
2925         pci_save_state(pdev);
2926         pci_disable_device(pdev);
2927         pci_set_power_state(pdev, PCI_D3hot);
2928
2929         return 0;
2930 }
2931 EXPORT_SYMBOL(iwl_pci_suspend);
2932
2933 int iwl_pci_resume(struct pci_dev *pdev)
2934 {
2935         struct iwl_priv *priv = pci_get_drvdata(pdev);
2936         int ret;
2937
2938         pci_set_power_state(pdev, PCI_D0);
2939         ret = pci_enable_device(pdev);
2940         if (ret)
2941                 return ret;
2942         pci_restore_state(pdev);
2943         iwl_enable_interrupts(priv);
2944
2945         return 0;
2946 }
2947 EXPORT_SYMBOL(iwl_pci_resume);
2948
2949 #endif /* CONFIG_PM */