SAFE public projects git trees. - safe/jmp/linux-2.6/blob - 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 <net/mac80211.h>
  34
  35 #include "iwl-eeprom.h"
  36 #include "iwl-dev.h" /* FIXME: remove */
  37 #include "iwl-debug.h"
  38 #include "iwl-core.h"
  39 #include "iwl-io.h"
  40 #include "iwl-power.h"
  41 #include "iwl-sta.h"
  42 #include "iwl-helpers.h"
  43
  44
  45 MODULE_DESCRIPTION("iwl core");
  46 MODULE_VERSION(IWLWIFI_VERSION);
  47 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
  48 MODULE_LICENSE("GPL");
  49
  50 /*
  51  * set bt_coex_active to true, uCode will do kill/defer
  52  * every time the priority line is asserted (BT is sending signals on the
  53  * priority line in the PCIx).
  54  * set bt_coex_active to false, uCode will ignore the BT activity and
  55  * perform the normal operation
  56  *
  57  * User might experience transmit issue on some platform due to WiFi/BT
  58  * co-exist problem. The possible behaviors are:
  59  *   Able to scan and finding all the available AP
  60  *   Not able to associate with any AP
  61  * On those platforms, WiFi communication can be restored by set
  62  * "bt_coex_active" module parameter to "false"
  63  *
  64  * default: bt_coex_active = true (BT_COEX_ENABLE)
  65  */
  66 static bool bt_coex_active = true;
  67 module_param(bt_coex_active, bool, S_IRUGO);
  68 MODULE_PARM_DESC(bt_coex_active, "enable wifi/bluetooth co-exist");
  69
  70 static struct iwl_wimax_coex_event_entry cu_priorities[COEX_NUM_OF_EVENTS] = {
  71         {COEX_CU_UNASSOC_IDLE_RP, COEX_CU_UNASSOC_IDLE_WP,
  72          0, COEX_UNASSOC_IDLE_FLAGS},
  73         {COEX_CU_UNASSOC_MANUAL_SCAN_RP, COEX_CU_UNASSOC_MANUAL_SCAN_WP,
  74          0, COEX_UNASSOC_MANUAL_SCAN_FLAGS},
  75         {COEX_CU_UNASSOC_AUTO_SCAN_RP, COEX_CU_UNASSOC_AUTO_SCAN_WP,
  76          0, COEX_UNASSOC_AUTO_SCAN_FLAGS},
  77         {COEX_CU_CALIBRATION_RP, COEX_CU_CALIBRATION_WP,
  78          0, COEX_CALIBRATION_FLAGS},
  79         {COEX_CU_PERIODIC_CALIBRATION_RP, COEX_CU_PERIODIC_CALIBRATION_WP,
  80          0, COEX_PERIODIC_CALIBRATION_FLAGS},
  81         {COEX_CU_CONNECTION_ESTAB_RP, COEX_CU_CONNECTION_ESTAB_WP,
  82          0, COEX_CONNECTION_ESTAB_FLAGS},
  83         {COEX_CU_ASSOCIATED_IDLE_RP, COEX_CU_ASSOCIATED_IDLE_WP,
  84          0, COEX_ASSOCIATED_IDLE_FLAGS},
  85         {COEX_CU_ASSOC_MANUAL_SCAN_RP, COEX_CU_ASSOC_MANUAL_SCAN_WP,
  86          0, COEX_ASSOC_MANUAL_SCAN_FLAGS},
  87         {COEX_CU_ASSOC_AUTO_SCAN_RP, COEX_CU_ASSOC_AUTO_SCAN_WP,
  88          0, COEX_ASSOC_AUTO_SCAN_FLAGS},
  89         {COEX_CU_ASSOC_ACTIVE_LEVEL_RP, COEX_CU_ASSOC_ACTIVE_LEVEL_WP,
  90          0, COEX_ASSOC_ACTIVE_LEVEL_FLAGS},
  91         {COEX_CU_RF_ON_RP, COEX_CU_RF_ON_WP, 0, COEX_CU_RF_ON_FLAGS},
  92         {COEX_CU_RF_OFF_RP, COEX_CU_RF_OFF_WP, 0, COEX_RF_OFF_FLAGS},
  93         {COEX_CU_STAND_ALONE_DEBUG_RP, COEX_CU_STAND_ALONE_DEBUG_WP,
  94          0, COEX_STAND_ALONE_DEBUG_FLAGS},
  95         {COEX_CU_IPAN_ASSOC_LEVEL_RP, COEX_CU_IPAN_ASSOC_LEVEL_WP,
  96          0, COEX_IPAN_ASSOC_LEVEL_FLAGS},
  97         {COEX_CU_RSRVD1_RP, COEX_CU_RSRVD1_WP, 0, COEX_RSRVD1_FLAGS},
  98         {COEX_CU_RSRVD2_RP, COEX_CU_RSRVD2_WP, 0, COEX_RSRVD2_FLAGS}
  99 };
 100
 101 #define IWL_DECLARE_RATE_INFO(r, s, ip, in, rp, rn, pp, np)    \
 102         [IWL_RATE_##r##M_INDEX] = { IWL_RATE_##r##M_PLCP,      \
 103                                     IWL_RATE_SISO_##s##M_PLCP, \
 104                                     IWL_RATE_MIMO2_##s##M_PLCP,\
 105                                     IWL_RATE_MIMO3_##s##M_PLCP,\
 106                                     IWL_RATE_##r##M_IEEE,      \
 107                                     IWL_RATE_##ip##M_INDEX,    \
 108                                     IWL_RATE_##in##M_INDEX,    \
 109                                     IWL_RATE_##rp##M_INDEX,    \
 110                                     IWL_RATE_##rn##M_INDEX,    \
 111                                     IWL_RATE_##pp##M_INDEX,    \
 112                                     IWL_RATE_##np##M_INDEX }
 113
 114 u32 iwl_debug_level;
 115 EXPORT_SYMBOL(iwl_debug_level);
 116
 117 /*
 118  * Parameter order:
 119  *   rate, ht rate, prev rate, next rate, prev tgg rate, next tgg rate
 120  *
 121  * If there isn't a valid next or previous rate then INV is used which
 122  * maps to IWL_RATE_INVALID
 123  *
 124  */
 125 const struct iwl_rate_info iwl_rates[IWL_RATE_COUNT] = {
 126         IWL_DECLARE_RATE_INFO(1, INV, INV, 2, INV, 2, INV, 2),    /*  1mbps */
 127         IWL_DECLARE_RATE_INFO(2, INV, 1, 5, 1, 5, 1, 5),          /*  2mbps */
 128         IWL_DECLARE_RATE_INFO(5, INV, 2, 6, 2, 11, 2, 11),        /*5.5mbps */
 129         IWL_DECLARE_RATE_INFO(11, INV, 9, 12, 9, 12, 5, 18),      /* 11mbps */
 130         IWL_DECLARE_RATE_INFO(6, 6, 5, 9, 5, 11, 5, 11),        /*  6mbps */
 131         IWL_DECLARE_RATE_INFO(9, 6, 6, 11, 6, 11, 5, 11),       /*  9mbps */
 132         IWL_DECLARE_RATE_INFO(12, 12, 11, 18, 11, 18, 11, 18),   /* 12mbps */
 133         IWL_DECLARE_RATE_INFO(18, 18, 12, 24, 12, 24, 11, 24),   /* 18mbps */
 134         IWL_DECLARE_RATE_INFO(24, 24, 18, 36, 18, 36, 18, 36),   /* 24mbps */
 135         IWL_DECLARE_RATE_INFO(36, 36, 24, 48, 24, 48, 24, 48),   /* 36mbps */
 136         IWL_DECLARE_RATE_INFO(48, 48, 36, 54, 36, 54, 36, 54),   /* 48mbps */
 137         IWL_DECLARE_RATE_INFO(54, 54, 48, INV, 48, INV, 48, INV),/* 54mbps */
 138         IWL_DECLARE_RATE_INFO(60, 60, 48, INV, 48, INV, 48, INV),/* 60mbps */
 139         /* FIXME:RS:          ^^    should be INV (legacy) */
 140 };
 141 EXPORT_SYMBOL(iwl_rates);
 142
 143 int iwl_hwrate_to_plcp_idx(u32 rate_n_flags)
 144 {
 145         int idx = 0;
 146
 147         /* HT rate format */
 148         if (rate_n_flags & RATE_MCS_HT_MSK) {
 149                 idx = (rate_n_flags & 0xff);
 150
 151                 if (idx >= IWL_RATE_MIMO3_6M_PLCP)
 152                         idx = idx - IWL_RATE_MIMO3_6M_PLCP;
 153                 else if (idx >= IWL_RATE_MIMO2_6M_PLCP)
 154                         idx = idx - IWL_RATE_MIMO2_6M_PLCP;
 155
 156                 idx += IWL_FIRST_OFDM_RATE;
 157                 /* skip 9M not supported in ht*/
 158                 if (idx >= IWL_RATE_9M_INDEX)
 159                         idx += 1;
 160                 if ((idx >= IWL_FIRST_OFDM_RATE) && (idx <= IWL_LAST_OFDM_RATE))
 161                         return idx;
 162
 163         /* legacy rate format, search for match in table */
 164         } else {
 165                 for (idx = 0; idx < ARRAY_SIZE(iwl_rates); idx++)
 166                         if (iwl_rates[idx].plcp == (rate_n_flags & 0xFF))
 167                                 return idx;
 168         }
 169
 170         return -1;
 171 }
 172 EXPORT_SYMBOL(iwl_hwrate_to_plcp_idx);
 173
 174 u8 iwl_toggle_tx_ant(struct iwl_priv *priv, u8 ant)
 175 {
 176         int i;
 177         u8 ind = ant;
 178         for (i = 0; i < RATE_ANT_NUM - 1; i++) {
 179                 ind = (ind + 1) < RATE_ANT_NUM ?  ind + 1 : 0;
 180                 if (priv->hw_params.valid_tx_ant & BIT(ind))
 181                         return ind;
 182         }
 183         return ant;
 184 }
 185 EXPORT_SYMBOL(iwl_toggle_tx_ant);
 186
 187 const u8 iwl_bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
 188 EXPORT_SYMBOL(iwl_bcast_addr);
 189
 190
 191 /* This function both allocates and initializes hw and priv. */
 192 struct ieee80211_hw *iwl_alloc_all(struct iwl_cfg *cfg,
 193                 struct ieee80211_ops *hw_ops)
 194 {
 195         struct iwl_priv *priv;
 196
 197         /* mac80211 allocates memory for this device instance, including
 198          *   space for this driver's private structure */
 199         struct ieee80211_hw *hw =
 200                 ieee80211_alloc_hw(sizeof(struct iwl_priv), hw_ops);
 201         if (hw == NULL) {
 202                 printk(KERN_ERR "%s: Can not allocate network device\n",
 203                        cfg->name);
 204                 goto out;
 205         }
 206
 207         priv = hw->priv;
 208         priv->hw = hw;
 209
 210 out:
 211         return hw;
 212 }
 213 EXPORT_SYMBOL(iwl_alloc_all);
 214
 215 void iwl_hw_detect(struct iwl_priv *priv)
 216 {
 217         priv->hw_rev = _iwl_read32(priv, CSR_HW_REV);
 218         priv->hw_wa_rev = _iwl_read32(priv, CSR_HW_REV_WA_REG);
 219         pci_read_config_byte(priv->pci_dev, PCI_REVISION_ID, &priv->rev_id);
 220 }
 221 EXPORT_SYMBOL(iwl_hw_detect);
 222
 223 /*
 224  * QoS  support
 225 */
 226 static void iwl_update_qos(struct iwl_priv *priv)
 227 {
 228         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 229                 return;
 230
 231         priv->qos_data.def_qos_parm.qos_flags = 0;
 232
 233         if (priv->qos_data.qos_active)
 234                 priv->qos_data.def_qos_parm.qos_flags |=
 235                         QOS_PARAM_FLG_UPDATE_EDCA_MSK;
 236
 237         if (priv->current_ht_config.is_ht)
 238                 priv->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
 239
 240         IWL_DEBUG_QOS(priv, "send QoS cmd with Qos active=%d FLAGS=0x%X\n",
 241                       priv->qos_data.qos_active,
 242                       priv->qos_data.def_qos_parm.qos_flags);
 243
 244         iwl_send_cmd_pdu_async(priv, REPLY_QOS_PARAM,
 245                                sizeof(struct iwl_qosparam_cmd),
 246                                &priv->qos_data.def_qos_parm, NULL);
 247 }
 248
 249 #define MAX_BIT_RATE_40_MHZ 150 /* Mbps */
 250 #define MAX_BIT_RATE_20_MHZ 72 /* Mbps */
 251 static void iwlcore_init_ht_hw_capab(const struct iwl_priv *priv,
 252                               struct ieee80211_sta_ht_cap *ht_info,
 253                               enum ieee80211_band band)
 254 {
 255         u16 max_bit_rate = 0;
 256         u8 rx_chains_num = priv->hw_params.rx_chains_num;
 257         u8 tx_chains_num = priv->hw_params.tx_chains_num;
 258
 259         ht_info->cap = 0;
 260         memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));
 261
 262         ht_info->ht_supported = true;
 263
 264         if (priv->cfg->ht_greenfield_support)
 265                 ht_info->cap |= IEEE80211_HT_CAP_GRN_FLD;
 266         ht_info->cap |= IEEE80211_HT_CAP_SGI_20;
 267         max_bit_rate = MAX_BIT_RATE_20_MHZ;
 268         if (priv->hw_params.ht40_channel & BIT(band)) {
 269                 ht_info->cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 270                 ht_info->cap |= IEEE80211_HT_CAP_SGI_40;
 271                 ht_info->mcs.rx_mask[4] = 0x01;
 272                 max_bit_rate = MAX_BIT_RATE_40_MHZ;
 273         }
 274
 275         if (priv->cfg->mod_params->amsdu_size_8K)
 276                 ht_info->cap |= IEEE80211_HT_CAP_MAX_AMSDU;
 277
 278         ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
 279         ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;
 280
 281         ht_info->mcs.rx_mask[0] = 0xFF;
 282         if (rx_chains_num >= 2)
 283                 ht_info->mcs.rx_mask[1] = 0xFF;
 284         if (rx_chains_num >= 3)
 285                 ht_info->mcs.rx_mask[2] = 0xFF;
 286
 287         /* Highest supported Rx data rate */
 288         max_bit_rate *= rx_chains_num;
 289         WARN_ON(max_bit_rate & ~IEEE80211_HT_MCS_RX_HIGHEST_MASK);
 290         ht_info->mcs.rx_highest = cpu_to_le16(max_bit_rate);
 291
 292         /* Tx MCS capabilities */
 293         ht_info->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
 294         if (tx_chains_num != rx_chains_num) {
 295                 ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
 296                 ht_info->mcs.tx_params |= ((tx_chains_num - 1) <<
 297                                 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT);
 298         }
 299 }
 300
 301 /**
 302  * iwlcore_init_geos - Initialize mac80211's geo/channel info based from eeprom
 303  */
 304 int iwlcore_init_geos(struct iwl_priv *priv)
 305 {
 306         struct iwl_channel_info *ch;
 307         struct ieee80211_supported_band *sband;
 308         struct ieee80211_channel *channels;
 309         struct ieee80211_channel *geo_ch;
 310         struct ieee80211_rate *rates;
 311         int i = 0;
 312
 313         if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
 314             priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
 315                 IWL_DEBUG_INFO(priv, "Geography modes already initialized.\n");
 316                 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
 317                 return 0;
 318         }
 319
 320         channels = kzalloc(sizeof(struct ieee80211_channel) *
 321                            priv->channel_count, GFP_KERNEL);
 322         if (!channels)
 323                 return -ENOMEM;
 324
 325         rates = kzalloc((sizeof(struct ieee80211_rate) * IWL_RATE_COUNT_LEGACY),
 326                         GFP_KERNEL);
 327         if (!rates) {
 328                 kfree(channels);
 329                 return -ENOMEM;
 330         }
 331
 332         /* 5.2GHz channels start after the 2.4GHz channels */
 333         sband = &priv->bands[IEEE80211_BAND_5GHZ];
 334         sband->channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)];
 335         /* just OFDM */
 336         sband->bitrates = &rates[IWL_FIRST_OFDM_RATE];
 337         sband->n_bitrates = IWL_RATE_COUNT_LEGACY - IWL_FIRST_OFDM_RATE;
 338
 339         if (priv->cfg->sku & IWL_SKU_N)
 340                 iwlcore_init_ht_hw_capab(priv, &sband->ht_cap,
 341                                          IEEE80211_BAND_5GHZ);
 342
 343         sband = &priv->bands[IEEE80211_BAND_2GHZ];
 344         sband->channels = channels;
 345         /* OFDM & CCK */
 346         sband->bitrates = rates;
 347         sband->n_bitrates = IWL_RATE_COUNT_LEGACY;
 348
 349         if (priv->cfg->sku & IWL_SKU_N)
 350                 iwlcore_init_ht_hw_capab(priv, &sband->ht_cap,
 351                                          IEEE80211_BAND_2GHZ);
 352
 353         priv->ieee_channels = channels;
 354         priv->ieee_rates = rates;
 355
 356         for (i = 0;  i < priv->channel_count; i++) {
 357                 ch = &priv->channel_info[i];
 358
 359                 /* FIXME: might be removed if scan is OK */
 360                 if (!is_channel_valid(ch))
 361                         continue;
 362
 363                 if (is_channel_a_band(ch))
 364                         sband =  &priv->bands[IEEE80211_BAND_5GHZ];
 365                 else
 366                         sband =  &priv->bands[IEEE80211_BAND_2GHZ];
 367
 368                 geo_ch = &sband->channels[sband->n_channels++];
 369
 370                 geo_ch->center_freq =
 371                                 ieee80211_channel_to_frequency(ch->channel);
 372                 geo_ch->max_power = ch->max_power_avg;
 373                 geo_ch->max_antenna_gain = 0xff;
 374                 geo_ch->hw_value = ch->channel;
 375
 376                 if (is_channel_valid(ch)) {
 377                         if (!(ch->flags & EEPROM_CHANNEL_IBSS))
 378                                 geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
 379
 380                         if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
 381                                 geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
 382
 383                         if (ch->flags & EEPROM_CHANNEL_RADAR)
 384                                 geo_ch->flags |= IEEE80211_CHAN_RADAR;
 385
 386                         geo_ch->flags |= ch->ht40_extension_channel;
 387
 388                         if (ch->max_power_avg > priv->tx_power_device_lmt)
 389                                 priv->tx_power_device_lmt = ch->max_power_avg;
 390                 } else {
 391                         geo_ch->flags |= IEEE80211_CHAN_DISABLED;
 392                 }
 393
 394                 IWL_DEBUG_INFO(priv, "Channel %d Freq=%d[%sGHz] %s flag=0x%X\n",
 395                                 ch->channel, geo_ch->center_freq,
 396                                 is_channel_a_band(ch) ?  "5.2" : "2.4",
 397                                 geo_ch->flags & IEEE80211_CHAN_DISABLED ?
 398                                 "restricted" : "valid",
 399                                  geo_ch->flags);
 400         }
 401
 402         if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) &&
 403              priv->cfg->sku & IWL_SKU_A) {
 404                 IWL_INFO(priv, "Incorrectly detected BG card as ABG. "
 405                         "Please send your PCI ID 0x%04X:0x%04X to maintainer.\n",
 406                            priv->pci_dev->device,
 407                            priv->pci_dev->subsystem_device);
 408                 priv->cfg->sku &= ~IWL_SKU_A;
 409         }
 410
 411         IWL_INFO(priv, "Tunable channels: %d 802.11bg, %d 802.11a channels\n",
 412                    priv->bands[IEEE80211_BAND_2GHZ].n_channels,
 413                    priv->bands[IEEE80211_BAND_5GHZ].n_channels);
 414
 415         set_bit(STATUS_GEO_CONFIGURED, &priv->status);
 416
 417         return 0;
 418 }
 419 EXPORT_SYMBOL(iwlcore_init_geos);
 420
 421 /*
 422  * iwlcore_free_geos - undo allocations in iwlcore_init_geos
 423  */
 424 void iwlcore_free_geos(struct iwl_priv *priv)
 425 {
 426         kfree(priv->ieee_channels);
 427         kfree(priv->ieee_rates);
 428         clear_bit(STATUS_GEO_CONFIGURED, &priv->status);
 429 }
 430 EXPORT_SYMBOL(iwlcore_free_geos);
 431
 432 /*
 433  *  iwlcore_rts_tx_cmd_flag: Set rts/cts. 3945 and 4965 only share this
 434  *  function.
 435  */
 436 void iwlcore_rts_tx_cmd_flag(struct ieee80211_tx_info *info,
 437                                 __le32 *tx_flags)
 438 {
 439         if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) {
 440                 *tx_flags |= TX_CMD_FLG_RTS_MSK;
 441                 *tx_flags &= ~TX_CMD_FLG_CTS_MSK;
 442         } else if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
 443                 *tx_flags &= ~TX_CMD_FLG_RTS_MSK;
 444                 *tx_flags |= TX_CMD_FLG_CTS_MSK;
 445         }
 446 }
 447 EXPORT_SYMBOL(iwlcore_rts_tx_cmd_flag);
 448
 449 static bool is_single_rx_stream(struct iwl_priv *priv)
 450 {
 451         return priv->current_ht_config.smps == IEEE80211_SMPS_STATIC ||
 452                priv->current_ht_config.single_chain_sufficient;
 453 }
 454
 455 static u8 iwl_is_channel_extension(struct iwl_priv *priv,
 456                                    enum ieee80211_band band,
 457                                    u16 channel, u8 extension_chan_offset)
 458 {
 459         const struct iwl_channel_info *ch_info;
 460
 461         ch_info = iwl_get_channel_info(priv, band, channel);
 462         if (!is_channel_valid(ch_info))
 463                 return 0;
 464
 465         if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE)
 466                 return !(ch_info->ht40_extension_channel &
 467                                         IEEE80211_CHAN_NO_HT40PLUS);
 468         else if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW)
 469                 return !(ch_info->ht40_extension_channel &
 470                                         IEEE80211_CHAN_NO_HT40MINUS);
 471
 472         return 0;
 473 }
 474
 475 u8 iwl_is_ht40_tx_allowed(struct iwl_priv *priv,
 476                          struct ieee80211_sta_ht_cap *sta_ht_inf)
 477 {
 478         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
 479
 480         if (!ht_conf->is_ht || !ht_conf->is_40mhz)
 481                 return 0;
 482
 483         /* We do not check for IEEE80211_HT_CAP_SUP_WIDTH_20_40
 484          * the bit will not set if it is pure 40MHz case
 485          */
 486         if (sta_ht_inf) {
 487                 if (!sta_ht_inf->ht_supported)
 488                         return 0;
 489         }
 490 #ifdef CONFIG_IWLWIFI_DEBUG
 491         if (priv->disable_ht40)
 492                 return 0;
 493 #endif
 494         return iwl_is_channel_extension(priv, priv->band,
 495                         le16_to_cpu(priv->staging_rxon.channel),
 496                         ht_conf->extension_chan_offset);
 497 }
 498 EXPORT_SYMBOL(iwl_is_ht40_tx_allowed);
 499
 500 static u16 iwl_adjust_beacon_interval(u16 beacon_val, u16 max_beacon_val)
 501 {
 502         u16 new_val = 0;
 503         u16 beacon_factor = 0;
 504
 505         beacon_factor = (beacon_val + max_beacon_val) / max_beacon_val;
 506         new_val = beacon_val / beacon_factor;
 507
 508         if (!new_val)
 509                 new_val = max_beacon_val;
 510
 511         return new_val;
 512 }
 513
 514 void iwl_setup_rxon_timing(struct iwl_priv *priv)
 515 {
 516         u64 tsf;
 517         s32 interval_tm, rem;
 518         unsigned long flags;
 519         struct ieee80211_conf *conf = NULL;
 520         u16 beacon_int;
 521
 522         conf = ieee80211_get_hw_conf(priv->hw);
 523
 524         spin_lock_irqsave(&priv->lock, flags);
 525         priv->rxon_timing.timestamp = cpu_to_le64(priv->timestamp);
 526         priv->rxon_timing.listen_interval = cpu_to_le16(conf->listen_interval);
 527
 528         if (priv->iw_mode == NL80211_IFTYPE_STATION) {
 529                 beacon_int = priv->beacon_int;
 530                 priv->rxon_timing.atim_window = 0;
 531         } else {
 532                 beacon_int = priv->vif->bss_conf.beacon_int;
 533
 534                 /* TODO: we need to get atim_window from upper stack
 535                  * for now we set to 0 */
 536                 priv->rxon_timing.atim_window = 0;
 537         }
 538
 539         beacon_int = iwl_adjust_beacon_interval(beacon_int,
 540                                 priv->hw_params.max_beacon_itrvl * 1024);
 541         priv->rxon_timing.beacon_interval = cpu_to_le16(beacon_int);
 542
 543         tsf = priv->timestamp; /* tsf is modifed by do_div: copy it */
 544         interval_tm = beacon_int * 1024;
 545         rem = do_div(tsf, interval_tm);
 546         priv->rxon_timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
 547
 548         spin_unlock_irqrestore(&priv->lock, flags);
 549         IWL_DEBUG_ASSOC(priv,
 550                         "beacon interval %d beacon timer %d beacon tim %d\n",
 551                         le16_to_cpu(priv->rxon_timing.beacon_interval),
 552                         le32_to_cpu(priv->rxon_timing.beacon_init_val),
 553                         le16_to_cpu(priv->rxon_timing.atim_window));
 554 }
 555 EXPORT_SYMBOL(iwl_setup_rxon_timing);
 556
 557 void iwl_set_rxon_hwcrypto(struct iwl_priv *priv, int hw_decrypt)
 558 {
 559         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
 560
 561         if (hw_decrypt)
 562                 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
 563         else
 564                 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
 565
 566 }
 567 EXPORT_SYMBOL(iwl_set_rxon_hwcrypto);
 568
 569 /**
 570  * iwl_check_rxon_cmd - validate RXON structure is valid
 571  *
 572  * NOTE:  This is really only useful during development and can eventually
 573  * be #ifdef'd out once the driver is stable and folks aren't actively
 574  * making changes
 575  */
 576 int iwl_check_rxon_cmd(struct iwl_priv *priv)
 577 {
 578         int error = 0;
 579         int counter = 1;
 580         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
 581
 582         if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
 583                 error |= le32_to_cpu(rxon->flags &
 584                                 (RXON_FLG_TGJ_NARROW_BAND_MSK |
 585                                  RXON_FLG_RADAR_DETECT_MSK));
 586                 if (error)
 587                         IWL_WARN(priv, "check 24G fields %d | %d\n",
 588                                     counter++, error);
 589         } else {
 590                 error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ?
 591                                 0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK);
 592                 if (error)
 593                         IWL_WARN(priv, "check 52 fields %d | %d\n",
 594                                     counter++, error);
 595                 error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK);
 596                 if (error)
 597                         IWL_WARN(priv, "check 52 CCK %d | %d\n",
 598                                     counter++, error);
 599         }
 600         error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1;
 601         if (error)
 602                 IWL_WARN(priv, "check mac addr %d | %d\n", counter++, error);
 603
 604         /* make sure basic rates 6Mbps and 1Mbps are supported */
 605         error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) &&
 606                   ((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0));
 607         if (error)
 608                 IWL_WARN(priv, "check basic rate %d | %d\n", counter++, error);
 609
 610         error |= (le16_to_cpu(rxon->assoc_id) > 2007);
 611         if (error)
 612                 IWL_WARN(priv, "check assoc id %d | %d\n", counter++, error);
 613
 614         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
 615                         == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK));
 616         if (error)
 617                 IWL_WARN(priv, "check CCK and short slot %d | %d\n",
 618                             counter++, error);
 619
 620         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
 621                         == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK));
 622         if (error)
 623                 IWL_WARN(priv, "check CCK & auto detect %d | %d\n",
 624                             counter++, error);
 625
 626         error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
 627                         RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK);
 628         if (error)
 629                 IWL_WARN(priv, "check TGG and auto detect %d | %d\n",
 630                             counter++, error);
 631
 632         if (error)
 633                 IWL_WARN(priv, "Tuning to channel %d\n",
 634                             le16_to_cpu(rxon->channel));
 635
 636         if (error) {
 637                 IWL_ERR(priv, "Not a valid iwl_rxon_assoc_cmd field values\n");
 638                 return -1;
 639         }
 640         return 0;
 641 }
 642 EXPORT_SYMBOL(iwl_check_rxon_cmd);
 643
 644 /**
 645  * iwl_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
 646  * @priv: staging_rxon is compared to active_rxon
 647  *
 648  * If the RXON structure is changing enough to require a new tune,
 649  * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
 650  * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
 651  */
 652 int iwl_full_rxon_required(struct iwl_priv *priv)
 653 {
 654
 655         /* These items are only settable from the full RXON command */
 656         if (!(iwl_is_associated(priv)) ||
 657             compare_ether_addr(priv->staging_rxon.bssid_addr,
 658                                priv->active_rxon.bssid_addr) ||
 659             compare_ether_addr(priv->staging_rxon.node_addr,
 660                                priv->active_rxon.node_addr) ||
 661             compare_ether_addr(priv->staging_rxon.wlap_bssid_addr,
 662                                priv->active_rxon.wlap_bssid_addr) ||
 663             (priv->staging_rxon.dev_type != priv->active_rxon.dev_type) ||
 664             (priv->staging_rxon.channel != priv->active_rxon.channel) ||
 665             (priv->staging_rxon.air_propagation !=
 666              priv->active_rxon.air_propagation) ||
 667             (priv->staging_rxon.ofdm_ht_single_stream_basic_rates !=
 668              priv->active_rxon.ofdm_ht_single_stream_basic_rates) ||
 669             (priv->staging_rxon.ofdm_ht_dual_stream_basic_rates !=
 670              priv->active_rxon.ofdm_ht_dual_stream_basic_rates) ||
 671             (priv->staging_rxon.ofdm_ht_triple_stream_basic_rates !=
 672              priv->active_rxon.ofdm_ht_triple_stream_basic_rates) ||
 673             (priv->staging_rxon.assoc_id != priv->active_rxon.assoc_id))
 674                 return 1;
 675
 676         /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
 677          * be updated with the RXON_ASSOC command -- however only some
 678          * flag transitions are allowed using RXON_ASSOC */
 679
 680         /* Check if we are not switching bands */
 681         if ((priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) !=
 682             (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK))
 683                 return 1;
 684
 685         /* Check if we are switching association toggle */
 686         if ((priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) !=
 687                 (priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK))
 688                 return 1;
 689
 690         return 0;
 691 }
 692 EXPORT_SYMBOL(iwl_full_rxon_required);
 693
 694 u8 iwl_rate_get_lowest_plcp(struct iwl_priv *priv)
 695 {
 696         /*
 697          * Assign the lowest rate -- should really get this from
 698          * the beacon skb from mac80211.
 699          */
 700         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)
 701                 return IWL_RATE_1M_PLCP;
 702         else
 703                 return IWL_RATE_6M_PLCP;
 704 }
 705 EXPORT_SYMBOL(iwl_rate_get_lowest_plcp);
 706
 707 void iwl_set_rxon_ht(struct iwl_priv *priv, struct iwl_ht_config *ht_conf)
 708 {
 709         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
 710
 711         if (!ht_conf->is_ht) {
 712                 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
 713                         RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK |
 714                         RXON_FLG_HT40_PROT_MSK |
 715                         RXON_FLG_HT_PROT_MSK);
 716                 return;
 717         }
 718
 719         /* FIXME: if the definition of ht_protection changed, the "translation"
 720          * will be needed for rxon->flags
 721          */
 722         rxon->flags |= cpu_to_le32(ht_conf->ht_protection << RXON_FLG_HT_OPERATING_MODE_POS);
 723
 724         /* Set up channel bandwidth:
 725          * 20 MHz only, 20/40 mixed or pure 40 if ht40 ok */
 726         /* clear the HT channel mode before set the mode */
 727         rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
 728                          RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
 729         if (iwl_is_ht40_tx_allowed(priv, NULL)) {
 730                 /* pure ht40 */
 731                 if (ht_conf->ht_protection == IEEE80211_HT_OP_MODE_PROTECTION_20MHZ) {
 732                         rxon->flags |= RXON_FLG_CHANNEL_MODE_PURE_40;
 733                         /* Note: control channel is opposite of extension channel */
 734                         switch (ht_conf->extension_chan_offset) {
 735                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 736                                 rxon->flags &= ~RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
 737                                 break;
 738                         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 739                                 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
 740                                 break;
 741                         }
 742                 } else {
 743                         /* Note: control channel is opposite of extension channel */
 744                         switch (ht_conf->extension_chan_offset) {
 745                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 746                                 rxon->flags &= ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
 747                                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
 748                                 break;
 749                         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 750                                 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
 751                                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
 752                                 break;
 753                         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
 754                         default:
 755                                 /* channel location only valid if in Mixed mode */
 756                                 IWL_ERR(priv, "invalid extension channel offset\n");
 757                                 break;
 758                         }
 759                 }
 760         } else {
 761                 rxon->flags |= RXON_FLG_CHANNEL_MODE_LEGACY;
 762         }
 763
 764         if (priv->cfg->ops->hcmd->set_rxon_chain)
 765                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
 766
 767         IWL_DEBUG_ASSOC(priv, "rxon flags 0x%X operation mode :0x%X "
 768                         "extension channel offset 0x%x\n",
 769                         le32_to_cpu(rxon->flags), ht_conf->ht_protection,
 770                         ht_conf->extension_chan_offset);
 771         return;
 772 }
 773 EXPORT_SYMBOL(iwl_set_rxon_ht);
 774
 775 #define IWL_NUM_RX_CHAINS_MULTIPLE      3
 776 #define IWL_NUM_RX_CHAINS_SINGLE        2
 777 #define IWL_NUM_IDLE_CHAINS_DUAL        2
 778 #define IWL_NUM_IDLE_CHAINS_SINGLE      1
 779
 780 /*
 781  * Determine how many receiver/antenna chains to use.
 782  *
 783  * More provides better reception via diversity.  Fewer saves power
 784  * at the expense of throughput, but only when not in powersave to
 785  * start with.
 786  *
 787  * MIMO (dual stream) requires at least 2, but works better with 3.
 788  * This does not determine *which* chains to use, just how many.
 789  */
 790 static int iwl_get_active_rx_chain_count(struct iwl_priv *priv)
 791 {
 792         /* # of Rx chains to use when expecting MIMO. */
 793         if (is_single_rx_stream(priv))
 794                 return IWL_NUM_RX_CHAINS_SINGLE;
 795         else
 796                 return IWL_NUM_RX_CHAINS_MULTIPLE;
 797 }
 798
 799 /*
 800  * When we are in power saving mode, unless device support spatial
 801  * multiplexing power save, use the active count for rx chain count.
 802  */
 803 static int iwl_get_idle_rx_chain_count(struct iwl_priv *priv, int active_cnt)
 804 {
 805         /* # Rx chains when idling, depending on SMPS mode */
 806         switch (priv->current_ht_config.smps) {
 807         case IEEE80211_SMPS_STATIC:
 808         case IEEE80211_SMPS_DYNAMIC:
 809                 return IWL_NUM_IDLE_CHAINS_SINGLE;
 810         case IEEE80211_SMPS_OFF:
 811                 return active_cnt;
 812         default:
 813                 WARN(1, "invalid SMPS mode %d",
 814                      priv->current_ht_config.smps);
 815                 return active_cnt;
 816         }
 817 }
 818
 819 /* up to 4 chains */
 820 static u8 iwl_count_chain_bitmap(u32 chain_bitmap)
 821 {
 822         u8 res;
 823         res = (chain_bitmap & BIT(0)) >> 0;
 824         res += (chain_bitmap & BIT(1)) >> 1;
 825         res += (chain_bitmap & BIT(2)) >> 2;
 826         res += (chain_bitmap & BIT(3)) >> 3;
 827         return res;
 828 }
 829
 830 /**
 831  * iwl_set_rxon_chain - Set up Rx chain usage in "staging" RXON image
 832  *
 833  * Selects how many and which Rx receivers/antennas/chains to use.
 834  * This should not be used for scan command ... it puts data in wrong place.
 835  */
 836 void iwl_set_rxon_chain(struct iwl_priv *priv)
 837 {
 838         bool is_single = is_single_rx_stream(priv);
 839         bool is_cam = !test_bit(STATUS_POWER_PMI, &priv->status);
 840         u8 idle_rx_cnt, active_rx_cnt, valid_rx_cnt;
 841         u32 active_chains;
 842         u16 rx_chain;
 843
 844         /* Tell uCode which antennas are actually connected.
 845          * Before first association, we assume all antennas are connected.
 846          * Just after first association, iwl_chain_noise_calibration()
 847          *    checks which antennas actually *are* connected. */
 848          if (priv->chain_noise_data.active_chains)
 849                 active_chains = priv->chain_noise_data.active_chains;
 850         else
 851                 active_chains = priv->hw_params.valid_rx_ant;
 852
 853         rx_chain = active_chains << RXON_RX_CHAIN_VALID_POS;
 854
 855         /* How many receivers should we use? */
 856         active_rx_cnt = iwl_get_active_rx_chain_count(priv);
 857         idle_rx_cnt = iwl_get_idle_rx_chain_count(priv, active_rx_cnt);
 858
 859
 860         /* correct rx chain count according hw settings
 861          * and chain noise calibration
 862          */
 863         valid_rx_cnt = iwl_count_chain_bitmap(active_chains);
 864         if (valid_rx_cnt < active_rx_cnt)
 865                 active_rx_cnt = valid_rx_cnt;
 866
 867         if (valid_rx_cnt < idle_rx_cnt)
 868                 idle_rx_cnt = valid_rx_cnt;
 869
 870         rx_chain |= active_rx_cnt << RXON_RX_CHAIN_MIMO_CNT_POS;
 871         rx_chain |= idle_rx_cnt  << RXON_RX_CHAIN_CNT_POS;
 872
 873         priv->staging_rxon.rx_chain = cpu_to_le16(rx_chain);
 874
 875         if (!is_single && (active_rx_cnt >= IWL_NUM_RX_CHAINS_SINGLE) && is_cam)
 876                 priv->staging_rxon.rx_chain |= RXON_RX_CHAIN_MIMO_FORCE_MSK;
 877         else
 878                 priv->staging_rxon.rx_chain &= ~RXON_RX_CHAIN_MIMO_FORCE_MSK;
 879
 880         IWL_DEBUG_ASSOC(priv, "rx_chain=0x%X active=%d idle=%d\n",
 881                         priv->staging_rxon.rx_chain,
 882                         active_rx_cnt, idle_rx_cnt);
 883
 884         WARN_ON(active_rx_cnt == 0 || idle_rx_cnt == 0 ||
 885                 active_rx_cnt < idle_rx_cnt);
 886 }
 887 EXPORT_SYMBOL(iwl_set_rxon_chain);
 888
 889 /**
 890  * iwl_set_rxon_channel - Set the phymode and channel values in staging RXON
 891  * @phymode: MODE_IEEE80211A sets to 5.2GHz; all else set to 2.4GHz
 892  * @channel: Any channel valid for the requested phymode
 893
 894  * In addition to setting the staging RXON, priv->phymode is also set.
 895  *
 896  * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
 897  * in the staging RXON flag structure based on the phymode
 898  */
 899 int iwl_set_rxon_channel(struct iwl_priv *priv, struct ieee80211_channel *ch)
 900 {
 901         enum ieee80211_band band = ch->band;
 902         u16 channel = ieee80211_frequency_to_channel(ch->center_freq);
 903
 904         if (!iwl_get_channel_info(priv, band, channel)) {
 905                 IWL_DEBUG_INFO(priv, "Could not set channel to %d [%d]\n",
 906                                channel, band);
 907                 return -EINVAL;
 908         }
 909
 910         if ((le16_to_cpu(priv->staging_rxon.channel) == channel) &&
 911             (priv->band == band))
 912                 return 0;
 913
 914         priv->staging_rxon.channel = cpu_to_le16(channel);
 915         if (band == IEEE80211_BAND_5GHZ)
 916                 priv->staging_rxon.flags &= ~RXON_FLG_BAND_24G_MSK;
 917         else
 918                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
 919
 920         priv->band = band;
 921
 922         IWL_DEBUG_INFO(priv, "Staging channel set to %d [%d]\n", channel, band);
 923
 924         return 0;
 925 }
 926 EXPORT_SYMBOL(iwl_set_rxon_channel);
 927
 928 void iwl_set_flags_for_band(struct iwl_priv *priv,
 929                             enum ieee80211_band band)
 930 {
 931         if (band == IEEE80211_BAND_5GHZ) {
 932                 priv->staging_rxon.flags &=
 933                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
 934                       | RXON_FLG_CCK_MSK);
 935                 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
 936         } else {
 937                 /* Copied from iwl_post_associate() */
 938                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
 939                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
 940                 else
 941                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
 942
 943                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
 944                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
 945
 946                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
 947                 priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
 948                 priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
 949         }
 950 }
 951
 952 /*
 953  * initialize rxon structure with default values from eeprom
 954  */
 955 void iwl_connection_init_rx_config(struct iwl_priv *priv, int mode)
 956 {
 957         const struct iwl_channel_info *ch_info;
 958
 959         memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
 960
 961         switch (mode) {
 962         case NL80211_IFTYPE_AP:
 963                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
 964                 break;
 965
 966         case NL80211_IFTYPE_STATION:
 967                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
 968                 priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
 969                 break;
 970
 971         case NL80211_IFTYPE_ADHOC:
 972                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
 973                 priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
 974                 priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
 975                                                   RXON_FILTER_ACCEPT_GRP_MSK;
 976                 break;
 977
 978         default:
 979                 IWL_ERR(priv, "Unsupported interface type %d\n", mode);
 980                 break;
 981         }
 982
 983 #if 0
 984         /* TODO:  Figure out when short_preamble would be set and cache from
 985          * that */
 986         if (!hw_to_local(priv->hw)->short_preamble)
 987                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
 988         else
 989                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
 990 #endif
 991
 992         ch_info = iwl_get_channel_info(priv, priv->band,
 993                                        le16_to_cpu(priv->active_rxon.channel));
 994
 995         if (!ch_info)
 996                 ch_info = &priv->channel_info[0];
 997
 998         priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
 999         priv->band = ch_info->band;
1000
1001         iwl_set_flags_for_band(priv, priv->band);
1002
1003         priv->staging_rxon.ofdm_basic_rates =
1004             (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
1005         priv->staging_rxon.cck_basic_rates =
1006             (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
1007
1008         /* clear both MIX and PURE40 mode flag */
1009         priv->staging_rxon.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED |
1010                                         RXON_FLG_CHANNEL_MODE_PURE_40);
1011         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
1012         memcpy(priv->staging_rxon.wlap_bssid_addr, priv->mac_addr, ETH_ALEN);
1013         priv->staging_rxon.ofdm_ht_single_stream_basic_rates = 0xff;
1014         priv->staging_rxon.ofdm_ht_dual_stream_basic_rates = 0xff;
1015         priv->staging_rxon.ofdm_ht_triple_stream_basic_rates = 0xff;
1016 }
1017 EXPORT_SYMBOL(iwl_connection_init_rx_config);
1018
1019 static void iwl_set_rate(struct iwl_priv *priv)
1020 {
1021         const struct ieee80211_supported_band *hw = NULL;
1022         struct ieee80211_rate *rate;
1023         int i;
1024
1025         hw = iwl_get_hw_mode(priv, priv->band);
1026         if (!hw) {
1027                 IWL_ERR(priv, "Failed to set rate: unable to get hw mode\n");
1028                 return;
1029         }
1030
1031         priv->active_rate = 0;
1032
1033         for (i = 0; i < hw->n_bitrates; i++) {
1034                 rate = &(hw->bitrates[i]);
1035                 if (rate->hw_value < IWL_RATE_COUNT_LEGACY)
1036                         priv->active_rate |= (1 << rate->hw_value);
1037         }
1038
1039         IWL_DEBUG_RATE(priv, "Set active_rate = %0x\n", priv->active_rate);
1040
1041         priv->staging_rxon.cck_basic_rates =
1042             (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
1043
1044         priv->staging_rxon.ofdm_basic_rates =
1045            (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
1046 }
1047
1048 void iwl_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
1049 {
1050         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1051         struct iwl_rxon_cmd *rxon = (void *)&priv->active_rxon;
1052         struct iwl_csa_notification *csa = &(pkt->u.csa_notif);
1053
1054         if (priv->switch_rxon.switch_in_progress) {
1055                 if (!le32_to_cpu(csa->status) &&
1056                     (csa->channel == priv->switch_rxon.channel)) {
1057                         rxon->channel = csa->channel;
1058                         priv->staging_rxon.channel = csa->channel;
1059                         IWL_DEBUG_11H(priv, "CSA notif: channel %d\n",
1060                               le16_to_cpu(csa->channel));
1061                 } else
1062                         IWL_ERR(priv, "CSA notif (fail) : channel %d\n",
1063                               le16_to_cpu(csa->channel));
1064
1065                 priv->switch_rxon.switch_in_progress = false;
1066         }
1067 }
1068 EXPORT_SYMBOL(iwl_rx_csa);
1069
1070 #ifdef CONFIG_IWLWIFI_DEBUG
1071 void iwl_print_rx_config_cmd(struct iwl_priv *priv)
1072 {
1073         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
1074
1075         IWL_DEBUG_RADIO(priv, "RX CONFIG:\n");
1076         iwl_print_hex_dump(priv, IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
1077         IWL_DEBUG_RADIO(priv, "u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
1078         IWL_DEBUG_RADIO(priv, "u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
1079         IWL_DEBUG_RADIO(priv, "u32 filter_flags: 0x%08x\n",
1080                         le32_to_cpu(rxon->filter_flags));
1081         IWL_DEBUG_RADIO(priv, "u8 dev_type: 0x%x\n", rxon->dev_type);
1082         IWL_DEBUG_RADIO(priv, "u8 ofdm_basic_rates: 0x%02x\n",
1083                         rxon->ofdm_basic_rates);
1084         IWL_DEBUG_RADIO(priv, "u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
1085         IWL_DEBUG_RADIO(priv, "u8[6] node_addr: %pM\n", rxon->node_addr);
1086         IWL_DEBUG_RADIO(priv, "u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
1087         IWL_DEBUG_RADIO(priv, "u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
1088 }
1089 EXPORT_SYMBOL(iwl_print_rx_config_cmd);
1090 #endif
1091 /**
1092  * iwl_irq_handle_error - called for HW or SW error interrupt from card
1093  */
1094 void iwl_irq_handle_error(struct iwl_priv *priv)
1095 {
1096         /* Set the FW error flag -- cleared on iwl_down */
1097         set_bit(STATUS_FW_ERROR, &priv->status);
1098
1099         /* Cancel currently queued command. */
1100         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
1101
1102         priv->cfg->ops->lib->dump_nic_error_log(priv);
1103         if (priv->cfg->ops->lib->dump_csr)
1104                 priv->cfg->ops->lib->dump_csr(priv);
1105         if (priv->cfg->ops->lib->dump_fh)
1106                 priv->cfg->ops->lib->dump_fh(priv, NULL, false);
1107         priv->cfg->ops->lib->dump_nic_event_log(priv, false, NULL, false);
1108 #ifdef CONFIG_IWLWIFI_DEBUG
1109         if (iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS)
1110                 iwl_print_rx_config_cmd(priv);
1111 #endif
1112
1113         wake_up_interruptible(&priv->wait_command_queue);
1114
1115         /* Keep the restart process from trying to send host
1116          * commands by clearing the INIT status bit */
1117         clear_bit(STATUS_READY, &priv->status);
1118
1119         if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1120                 IWL_DEBUG(priv, IWL_DL_FW_ERRORS,
1121                           "Restarting adapter due to uCode error.\n");
1122
1123                 if (priv->cfg->mod_params->restart_fw)
1124                         queue_work(priv->workqueue, &priv->restart);
1125         }
1126 }
1127 EXPORT_SYMBOL(iwl_irq_handle_error);
1128
1129 static int iwl_apm_stop_master(struct iwl_priv *priv)
1130 {
1131         int ret = 0;
1132
1133         /* stop device's busmaster DMA activity */
1134         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
1135
1136         ret = iwl_poll_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_MASTER_DISABLED,
1137                         CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
1138         if (ret)
1139                 IWL_WARN(priv, "Master Disable Timed Out, 100 usec\n");
1140
1141         IWL_DEBUG_INFO(priv, "stop master\n");
1142
1143         return ret;
1144 }
1145
1146 void iwl_apm_stop(struct iwl_priv *priv)
1147 {
1148         IWL_DEBUG_INFO(priv, "Stop card, put in low power state\n");
1149
1150         /* Stop device's DMA activity */
1151         iwl_apm_stop_master(priv);
1152
1153         /* Reset the entire device */
1154         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
1155
1156         udelay(10);
1157
1158         /*
1159          * Clear "initialization complete" bit to move adapter from
1160          * D0A* (powered-up Active) --> D0U* (Uninitialized) state.
1161          */
1162         iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1163 }
1164 EXPORT_SYMBOL(iwl_apm_stop);
1165
1166
1167 /*
1168  * Start up NIC's basic functionality after it has been reset
1169  * (e.g. after platform boot, or shutdown via iwl_apm_stop())
1170  * NOTE:  This does not load uCode nor start the embedded processor
1171  */
1172 int iwl_apm_init(struct iwl_priv *priv)
1173 {
1174         int ret = 0;
1175         u16 lctl;
1176
1177         IWL_DEBUG_INFO(priv, "Init card's basic functions\n");
1178
1179         /*
1180          * Use "set_bit" below rather than "write", to preserve any hardware
1181          * bits already set by default after reset.
1182          */
1183
1184         /* Disable L0S exit timer (platform NMI Work/Around) */
1185         iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
1186                           CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
1187
1188         /*
1189          * Disable L0s without affecting L1;
1190          *  don't wait for ICH L0s (ICH bug W/A)
1191          */
1192         iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
1193                           CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
1194
1195         /* Set FH wait threshold to maximum (HW error during stress W/A) */
1196         iwl_set_bit(priv, CSR_DBG_HPET_MEM_REG, CSR_DBG_HPET_MEM_REG_VAL);
1197
1198         /*
1199          * Enable HAP INTA (interrupt from management bus) to
1200          * wake device's PCI Express link L1a -> L0s
1201          * NOTE:  This is no-op for 3945 (non-existant bit)
1202          */
1203         iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1204                                     CSR_HW_IF_CONFIG_REG_BIT_HAP_WAKE_L1A);
1205
1206         /*
1207          * HW bug W/A for instability in PCIe bus L0->L0S->L1 transition.
1208          * Check if BIOS (or OS) enabled L1-ASPM on this device.
1209          * If so (likely), disable L0S, so device moves directly L0->L1;
1210          *    costs negligible amount of power savings.
1211          * If not (unlikely), enable L0S, so there is at least some
1212          *    power savings, even without L1.
1213          */
1214         if (priv->cfg->set_l0s) {
1215                 lctl = iwl_pcie_link_ctl(priv);
1216                 if ((lctl & PCI_CFG_LINK_CTRL_VAL_L1_EN) ==
1217                                         PCI_CFG_LINK_CTRL_VAL_L1_EN) {
1218                         /* L1-ASPM enabled; disable(!) L0S  */
1219                         iwl_set_bit(priv, CSR_GIO_REG,
1220                                         CSR_GIO_REG_VAL_L0S_ENABLED);
1221                         IWL_DEBUG_POWER(priv, "L1 Enabled; Disabling L0S\n");
1222                 } else {
1223                         /* L1-ASPM disabled; enable(!) L0S */
1224                         iwl_clear_bit(priv, CSR_GIO_REG,
1225                                         CSR_GIO_REG_VAL_L0S_ENABLED);
1226                         IWL_DEBUG_POWER(priv, "L1 Disabled; Enabling L0S\n");
1227                 }
1228         }
1229
1230         /* Configure analog phase-lock-loop before activating to D0A */
1231         if (priv->cfg->pll_cfg_val)
1232                 iwl_set_bit(priv, CSR_ANA_PLL_CFG, priv->cfg->pll_cfg_val);
1233
1234         /*
1235          * Set "initialization complete" bit to move adapter from
1236          * D0U* --> D0A* (powered-up active) state.
1237          */
1238         iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1239
1240         /*
1241          * Wait for clock stabilization; once stabilized, access to
1242          * device-internal resources is supported, e.g. iwl_write_prph()
1243          * and accesses to uCode SRAM.
1244          */
1245         ret = iwl_poll_bit(priv, CSR_GP_CNTRL,
1246                         CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
1247                         CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
1248         if (ret < 0) {
1249                 IWL_DEBUG_INFO(priv, "Failed to init the card\n");
1250                 goto out;
1251         }
1252
1253         /*
1254          * Enable DMA and BSM (if used) clocks, wait for them to stabilize.
1255          * BSM (Boostrap State Machine) is only in 3945 and 4965;
1256          * later devices (i.e. 5000 and later) have non-volatile SRAM,
1257          * and don't need BSM to restore data after power-saving sleep.
1258          *
1259          * Write to "CLK_EN_REG"; "1" bits enable clocks, while "0" bits
1260          * do not disable clocks.  This preserves any hardware bits already
1261          * set by default in "CLK_CTRL_REG" after reset.
1262          */
1263         if (priv->cfg->use_bsm)
1264                 iwl_write_prph(priv, APMG_CLK_EN_REG,
1265                         APMG_CLK_VAL_DMA_CLK_RQT | APMG_CLK_VAL_BSM_CLK_RQT);
1266         else
1267                 iwl_write_prph(priv, APMG_CLK_EN_REG,
1268                         APMG_CLK_VAL_DMA_CLK_RQT);
1269         udelay(20);
1270
1271         /* Disable L1-Active */
1272         iwl_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
1273                           APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
1274
1275 out:
1276         return ret;
1277 }
1278 EXPORT_SYMBOL(iwl_apm_init);
1279
1280
1281
1282 void iwl_configure_filter(struct ieee80211_hw *hw,
1283                           unsigned int changed_flags,
1284                           unsigned int *total_flags,
1285                           u64 multicast)
1286 {
1287         struct iwl_priv *priv = hw->priv;
1288         __le32 *filter_flags = &priv->staging_rxon.filter_flags;
1289
1290         IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
1291                         changed_flags, *total_flags);
1292
1293         if (changed_flags & (FIF_OTHER_BSS | FIF_PROMISC_IN_BSS)) {
1294                 if (*total_flags & (FIF_OTHER_BSS | FIF_PROMISC_IN_BSS))
1295                         *filter_flags |= RXON_FILTER_PROMISC_MSK;
1296                 else
1297                         *filter_flags &= ~RXON_FILTER_PROMISC_MSK;
1298         }
1299         if (changed_flags & FIF_ALLMULTI) {
1300                 if (*total_flags & FIF_ALLMULTI)
1301                         *filter_flags |= RXON_FILTER_ACCEPT_GRP_MSK;
1302                 else
1303                         *filter_flags &= ~RXON_FILTER_ACCEPT_GRP_MSK;
1304         }
1305         if (changed_flags & FIF_CONTROL) {
1306                 if (*total_flags & FIF_CONTROL)
1307                         *filter_flags |= RXON_FILTER_CTL2HOST_MSK;
1308                 else
1309                         *filter_flags &= ~RXON_FILTER_CTL2HOST_MSK;
1310         }
1311         if (changed_flags & FIF_BCN_PRBRESP_PROMISC) {
1312                 if (*total_flags & FIF_BCN_PRBRESP_PROMISC)
1313                         *filter_flags |= RXON_FILTER_BCON_AWARE_MSK;
1314                 else
1315                         *filter_flags &= ~RXON_FILTER_BCON_AWARE_MSK;
1316         }
1317
1318         /* We avoid iwl_commit_rxon here to commit the new filter flags
1319          * since mac80211 will call ieee80211_hw_config immediately.
1320          * (mc_list is not supported at this time). Otherwise, we need to
1321          * queue a background iwl_commit_rxon work.
1322          */
1323
1324         *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
1325                         FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
1326 }
1327 EXPORT_SYMBOL(iwl_configure_filter);
1328
1329 int iwl_set_hw_params(struct iwl_priv *priv)
1330 {
1331         priv->hw_params.max_rxq_size = RX_QUEUE_SIZE;
1332         priv->hw_params.max_rxq_log = RX_QUEUE_SIZE_LOG;
1333         if (priv->cfg->mod_params->amsdu_size_8K)
1334                 priv->hw_params.rx_page_order = get_order(IWL_RX_BUF_SIZE_8K);
1335         else
1336                 priv->hw_params.rx_page_order = get_order(IWL_RX_BUF_SIZE_4K);
1337
1338         priv->hw_params.max_beacon_itrvl = IWL_MAX_UCODE_BEACON_INTERVAL;
1339
1340         if (priv->cfg->mod_params->disable_11n)
1341                 priv->cfg->sku &= ~IWL_SKU_N;
1342
1343         /* Device-specific setup */
1344         return priv->cfg->ops->lib->set_hw_params(priv);
1345 }
1346 EXPORT_SYMBOL(iwl_set_hw_params);
1347
1348 int iwl_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force)
1349 {
1350         int ret = 0;
1351         s8 prev_tx_power = priv->tx_power_user_lmt;
1352
1353         if (tx_power < IWLAGN_TX_POWER_TARGET_POWER_MIN) {
1354                 IWL_WARN(priv,
1355                          "Requested user TXPOWER %d below lower limit %d.\n",
1356                          tx_power,
1357                          IWLAGN_TX_POWER_TARGET_POWER_MIN);
1358                 return -EINVAL;
1359         }
1360
1361         if (tx_power > priv->tx_power_device_lmt) {
1362                 IWL_WARN(priv,
1363                         "Requested user TXPOWER %d above upper limit %d.\n",
1364                          tx_power, priv->tx_power_device_lmt);
1365                 return -EINVAL;
1366         }
1367
1368         if (priv->tx_power_user_lmt != tx_power)
1369                 force = true;
1370
1371         /* if nic is not up don't send command */
1372         if (iwl_is_ready_rf(priv)) {
1373                 priv->tx_power_user_lmt = tx_power;
1374                 if (force && priv->cfg->ops->lib->send_tx_power)
1375                         ret = priv->cfg->ops->lib->send_tx_power(priv);
1376                 else if (!priv->cfg->ops->lib->send_tx_power)
1377                         ret = -EOPNOTSUPP;
1378                 /*
1379                  * if fail to set tx_power, restore the orig. tx power
1380                  */
1381                 if (ret)
1382                         priv->tx_power_user_lmt = prev_tx_power;
1383         }
1384
1385         /*
1386          * Even this is an async host command, the command
1387          * will always report success from uCode
1388          * So once driver can placing the command into the queue
1389          * successfully, driver can use priv->tx_power_user_lmt
1390          * to reflect the current tx power
1391          */
1392         return ret;
1393 }
1394 EXPORT_SYMBOL(iwl_set_tx_power);
1395
1396 irqreturn_t iwl_isr_legacy(int irq, void *data)
1397 {
1398         struct iwl_priv *priv = data;
1399         u32 inta, inta_mask;
1400         u32 inta_fh;
1401         unsigned long flags;
1402         if (!priv)
1403                 return IRQ_NONE;
1404
1405         spin_lock_irqsave(&priv->lock, flags);
1406
1407         /* Disable (but don't clear!) interrupts here to avoid
1408          *    back-to-back ISRs and sporadic interrupts from our NIC.
1409          * If we have something to service, the tasklet will re-enable ints.
1410          * If we *don't* have something, we'll re-enable before leaving here. */
1411         inta_mask = iwl_read32(priv, CSR_INT_MASK);  /* just for debug */
1412         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
1413
1414         /* Discover which interrupts are active/pending */
1415         inta = iwl_read32(priv, CSR_INT);
1416         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1417
1418         /* Ignore interrupt if there's nothing in NIC to service.
1419          * This may be due to IRQ shared with another device,
1420          * or due to sporadic interrupts thrown from our NIC. */
1421         if (!inta && !inta_fh) {
1422                 IWL_DEBUG_ISR(priv, "Ignore interrupt, inta == 0, inta_fh == 0\n");
1423                 goto none;
1424         }
1425
1426         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
1427                 /* Hardware disappeared. It might have already raised
1428                  * an interrupt */
1429                 IWL_WARN(priv, "HARDWARE GONE?? INTA == 0x%08x\n", inta);
1430                 goto unplugged;
1431         }
1432
1433         IWL_DEBUG_ISR(priv, "ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1434                       inta, inta_mask, inta_fh);
1435
1436         inta &= ~CSR_INT_BIT_SCD;
1437
1438         /* iwl_irq_tasklet() will service interrupts and re-enable them */
1439         if (likely(inta || inta_fh))
1440                 tasklet_schedule(&priv->irq_tasklet);
1441
1442  unplugged:
1443         spin_unlock_irqrestore(&priv->lock, flags);
1444         return IRQ_HANDLED;
1445
1446  none:
1447         /* re-enable interrupts here since we don't have anything to service. */
1448         /* only Re-enable if diabled by irq */
1449         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1450                 iwl_enable_interrupts(priv);
1451         spin_unlock_irqrestore(&priv->lock, flags);
1452         return IRQ_NONE;
1453 }
1454 EXPORT_SYMBOL(iwl_isr_legacy);
1455
1456 void iwl_send_bt_config(struct iwl_priv *priv)
1457 {
1458         struct iwl_bt_cmd bt_cmd = {
1459                 .lead_time = BT_LEAD_TIME_DEF,
1460                 .max_kill = BT_MAX_KILL_DEF,
1461                 .kill_ack_mask = 0,
1462                 .kill_cts_mask = 0,
1463         };
1464
1465         if (!bt_coex_active)
1466                 bt_cmd.flags = BT_COEX_DISABLE;
1467         else
1468                 bt_cmd.flags = BT_COEX_ENABLE;
1469
1470         IWL_DEBUG_INFO(priv, "BT coex %s\n",
1471                 (bt_cmd.flags == BT_COEX_DISABLE) ? "disable" : "active");
1472
1473         if (iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG,
1474                              sizeof(struct iwl_bt_cmd), &bt_cmd))
1475                 IWL_ERR(priv, "failed to send BT Coex Config\n");
1476 }
1477 EXPORT_SYMBOL(iwl_send_bt_config);
1478
1479 int iwl_send_statistics_request(struct iwl_priv *priv, u8 flags, bool clear)
1480 {
1481         struct iwl_statistics_cmd statistics_cmd = {
1482                 .configuration_flags =
1483                         clear ? IWL_STATS_CONF_CLEAR_STATS : 0,
1484         };
1485
1486         if (flags & CMD_ASYNC)
1487                 return iwl_send_cmd_pdu_async(priv, REPLY_STATISTICS_CMD,
1488                                                sizeof(struct iwl_statistics_cmd),
1489                                                &statistics_cmd, NULL);
1490         else
1491                 return iwl_send_cmd_pdu(priv, REPLY_STATISTICS_CMD,
1492                                         sizeof(struct iwl_statistics_cmd),
1493                                         &statistics_cmd);
1494 }
1495 EXPORT_SYMBOL(iwl_send_statistics_request);
1496
1497 /**
1498  * iwl_verify_inst_sparse - verify runtime uCode image in card vs. host,
1499  *   using sample data 100 bytes apart.  If these sample points are good,
1500  *   it's a pretty good bet that everything between them is good, too.
1501  */
1502 static int iwlcore_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
1503 {
1504         u32 val;
1505         int ret = 0;
1506         u32 errcnt = 0;
1507         u32 i;
1508
1509         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
1510
1511         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
1512                 /* read data comes through single port, auto-incr addr */
1513                 /* NOTE: Use the debugless read so we don't flood kernel log
1514                  * if IWL_DL_IO is set */
1515                 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
1516                         i + IWL49_RTC_INST_LOWER_BOUND);
1517                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1518                 if (val != le32_to_cpu(*image)) {
1519                         ret = -EIO;
1520                         errcnt++;
1521                         if (errcnt >= 3)
1522                                 break;
1523                 }
1524         }
1525
1526         return ret;
1527 }
1528
1529 /**
1530  * iwlcore_verify_inst_full - verify runtime uCode image in card vs. host,
1531  *     looking at all data.
1532  */
1533 static int iwl_verify_inst_full(struct iwl_priv *priv, __le32 *image,
1534                                  u32 len)
1535 {
1536         u32 val;
1537         u32 save_len = len;
1538         int ret = 0;
1539         u32 errcnt;
1540
1541         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
1542
1543         iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
1544                            IWL49_RTC_INST_LOWER_BOUND);
1545
1546         errcnt = 0;
1547         for (; len > 0; len -= sizeof(u32), image++) {
1548                 /* read data comes through single port, auto-incr addr */
1549                 /* NOTE: Use the debugless read so we don't flood kernel log
1550                  * if IWL_DL_IO is set */
1551                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1552                 if (val != le32_to_cpu(*image)) {
1553                         IWL_ERR(priv, "uCode INST section is invalid at "
1554                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
1555                                   save_len - len, val, le32_to_cpu(*image));
1556                         ret = -EIO;
1557                         errcnt++;
1558                         if (errcnt >= 20)
1559                                 break;
1560                 }
1561         }
1562
1563         if (!errcnt)
1564                 IWL_DEBUG_INFO(priv,
1565                     "ucode image in INSTRUCTION memory is good\n");
1566
1567         return ret;
1568 }
1569
1570 /**
1571  * iwl_verify_ucode - determine which instruction image is in SRAM,
1572  *    and verify its contents
1573  */
1574 int iwl_verify_ucode(struct iwl_priv *priv)
1575 {
1576         __le32 *image;
1577         u32 len;
1578         int ret;
1579
1580         /* Try bootstrap */
1581         image = (__le32 *)priv->ucode_boot.v_addr;
1582         len = priv->ucode_boot.len;
1583         ret = iwlcore_verify_inst_sparse(priv, image, len);
1584         if (!ret) {
1585                 IWL_DEBUG_INFO(priv, "Bootstrap uCode is good in inst SRAM\n");
1586                 return 0;
1587         }
1588
1589         /* Try initialize */
1590         image = (__le32 *)priv->ucode_init.v_addr;
1591         len = priv->ucode_init.len;
1592         ret = iwlcore_verify_inst_sparse(priv, image, len);
1593         if (!ret) {
1594                 IWL_DEBUG_INFO(priv, "Initialize uCode is good in inst SRAM\n");
1595                 return 0;
1596         }
1597
1598         /* Try runtime/protocol */
1599         image = (__le32 *)priv->ucode_code.v_addr;
1600         len = priv->ucode_code.len;
1601         ret = iwlcore_verify_inst_sparse(priv, image, len);
1602         if (!ret) {
1603                 IWL_DEBUG_INFO(priv, "Runtime uCode is good in inst SRAM\n");
1604                 return 0;
1605         }
1606
1607         IWL_ERR(priv, "NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
1608
1609         /* Since nothing seems to match, show first several data entries in
1610          * instruction SRAM, so maybe visual inspection will give a clue.
1611          * Selection of bootstrap image (vs. other images) is arbitrary. */
1612         image = (__le32 *)priv->ucode_boot.v_addr;
1613         len = priv->ucode_boot.len;
1614         ret = iwl_verify_inst_full(priv, image, len);
1615
1616         return ret;
1617 }
1618 EXPORT_SYMBOL(iwl_verify_ucode);
1619
1620
1621 void iwl_rf_kill_ct_config(struct iwl_priv *priv)
1622 {
1623         struct iwl_ct_kill_config cmd;
1624         struct iwl_ct_kill_throttling_config adv_cmd;
1625         unsigned long flags;
1626         int ret = 0;
1627
1628         spin_lock_irqsave(&priv->lock, flags);
1629         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
1630                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
1631         spin_unlock_irqrestore(&priv->lock, flags);
1632         priv->thermal_throttle.ct_kill_toggle = false;
1633
1634         if (priv->cfg->support_ct_kill_exit) {
1635                 adv_cmd.critical_temperature_enter =
1636                         cpu_to_le32(priv->hw_params.ct_kill_threshold);
1637                 adv_cmd.critical_temperature_exit =
1638                         cpu_to_le32(priv->hw_params.ct_kill_exit_threshold);
1639
1640                 ret = iwl_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD,
1641                                        sizeof(adv_cmd), &adv_cmd);
1642                 if (ret)
1643                         IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
1644                 else
1645                         IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
1646                                         "succeeded, "
1647                                         "critical temperature enter is %d,"
1648                                         "exit is %d\n",
1649                                        priv->hw_params.ct_kill_threshold,
1650                                        priv->hw_params.ct_kill_exit_threshold);
1651         } else {
1652                 cmd.critical_temperature_R =
1653                         cpu_to_le32(priv->hw_params.ct_kill_threshold);
1654
1655                 ret = iwl_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD,
1656                                        sizeof(cmd), &cmd);
1657                 if (ret)
1658                         IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
1659                 else
1660                         IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
1661                                         "succeeded, "
1662                                         "critical temperature is %d\n",
1663                                         priv->hw_params.ct_kill_threshold);
1664         }
1665 }
1666 EXPORT_SYMBOL(iwl_rf_kill_ct_config);
1667
1668
1669 /*
1670  * CARD_STATE_CMD
1671  *
1672  * Use: Sets the device's internal card state to enable, disable, or halt
1673  *
1674  * When in the 'enable' state the card operates as normal.
1675  * When in the 'disable' state, the card enters into a low power mode.
1676  * When in the 'halt' state, the card is shut down and must be fully
1677  * restarted to come back on.
1678  */
1679 int iwl_send_card_state(struct iwl_priv *priv, u32 flags, u8 meta_flag)
1680 {
1681         struct iwl_host_cmd cmd = {
1682                 .id = REPLY_CARD_STATE_CMD,
1683                 .len = sizeof(u32),
1684                 .data = &flags,
1685                 .flags = meta_flag,
1686         };
1687
1688         return iwl_send_cmd(priv, &cmd);
1689 }
1690
1691 void iwl_rx_pm_sleep_notif(struct iwl_priv *priv,
1692                            struct iwl_rx_mem_buffer *rxb)
1693 {
1694 #ifdef CONFIG_IWLWIFI_DEBUG
1695         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1696         struct iwl_sleep_notification *sleep = &(pkt->u.sleep_notif);
1697         IWL_DEBUG_RX(priv, "sleep mode: %d, src: %d\n",
1698                      sleep->pm_sleep_mode, sleep->pm_wakeup_src);
1699 #endif
1700 }
1701 EXPORT_SYMBOL(iwl_rx_pm_sleep_notif);
1702
1703 void iwl_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
1704                                       struct iwl_rx_mem_buffer *rxb)
1705 {
1706         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1707         u32 len = le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
1708         IWL_DEBUG_RADIO(priv, "Dumping %d bytes of unhandled "
1709                         "notification for %s:\n", len,
1710                         get_cmd_string(pkt->hdr.cmd));
1711         iwl_print_hex_dump(priv, IWL_DL_RADIO, pkt->u.raw, len);
1712 }
1713 EXPORT_SYMBOL(iwl_rx_pm_debug_statistics_notif);
1714
1715 void iwl_rx_reply_error(struct iwl_priv *priv,
1716                         struct iwl_rx_mem_buffer *rxb)
1717 {
1718         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1719
1720         IWL_ERR(priv, "Error Reply type 0x%08X cmd %s (0x%02X) "
1721                 "seq 0x%04X ser 0x%08X\n",
1722                 le32_to_cpu(pkt->u.err_resp.error_type),
1723                 get_cmd_string(pkt->u.err_resp.cmd_id),
1724                 pkt->u.err_resp.cmd_id,
1725                 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
1726                 le32_to_cpu(pkt->u.err_resp.error_info));
1727 }
1728 EXPORT_SYMBOL(iwl_rx_reply_error);
1729
1730 void iwl_clear_isr_stats(struct iwl_priv *priv)
1731 {
1732         memset(&priv->isr_stats, 0, sizeof(priv->isr_stats));
1733 }
1734
1735 int iwl_mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
1736                            const struct ieee80211_tx_queue_params *params)
1737 {
1738         struct iwl_priv *priv = hw->priv;
1739         unsigned long flags;
1740         int q;
1741
1742         IWL_DEBUG_MAC80211(priv, "enter\n");
1743
1744         if (!iwl_is_ready_rf(priv)) {
1745                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1746                 return -EIO;
1747         }
1748
1749         if (queue >= AC_NUM) {
1750                 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1751                 return 0;
1752         }
1753
1754         q = AC_NUM - 1 - queue;
1755
1756         spin_lock_irqsave(&priv->lock, flags);
1757
1758         priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
1759         priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
1760         priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1761         priv->qos_data.def_qos_parm.ac[q].edca_txop =
1762                         cpu_to_le16((params->txop * 32));
1763
1764         priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1765
1766         spin_unlock_irqrestore(&priv->lock, flags);
1767
1768         IWL_DEBUG_MAC80211(priv, "leave\n");
1769         return 0;
1770 }
1771 EXPORT_SYMBOL(iwl_mac_conf_tx);
1772
1773 static void iwl_ht_conf(struct iwl_priv *priv,
1774                         struct ieee80211_bss_conf *bss_conf)
1775 {
1776         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
1777         struct ieee80211_sta *sta;
1778
1779         IWL_DEBUG_MAC80211(priv, "enter:\n");
1780
1781         if (!ht_conf->is_ht)
1782                 return;
1783
1784         ht_conf->ht_protection =
1785                 bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_PROTECTION;
1786         ht_conf->non_GF_STA_present =
1787                 !!(bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
1788
1789         ht_conf->single_chain_sufficient = false;
1790
1791         switch (priv->iw_mode) {
1792         case NL80211_IFTYPE_STATION:
1793                 rcu_read_lock();
1794                 sta = ieee80211_find_sta(priv->vif, priv->bssid);
1795                 if (sta) {
1796                         struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
1797                         int maxstreams;
1798
1799                         maxstreams = (ht_cap->mcs.tx_params &
1800                                       IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK)
1801                                         >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
1802                         maxstreams += 1;
1803
1804                         if ((ht_cap->mcs.rx_mask[1] == 0) &&
1805                             (ht_cap->mcs.rx_mask[2] == 0))
1806                                 ht_conf->single_chain_sufficient = true;
1807                         if (maxstreams <= 1)
1808                                 ht_conf->single_chain_sufficient = true;
1809                 } else {
1810                         /*
1811                          * If at all, this can only happen through a race
1812                          * when the AP disconnects us while we're still
1813                          * setting up the connection, in that case mac80211
1814                          * will soon tell us about that.
1815                          */
1816                         ht_conf->single_chain_sufficient = true;
1817                 }
1818                 rcu_read_unlock();
1819                 break;
1820         case NL80211_IFTYPE_ADHOC:
1821                 ht_conf->single_chain_sufficient = true;
1822                 break;
1823         default:
1824                 break;
1825         }
1826
1827         IWL_DEBUG_MAC80211(priv, "leave\n");
1828 }
1829
1830 static inline void iwl_set_no_assoc(struct iwl_priv *priv)
1831 {
1832         priv->assoc_id = 0;
1833         iwl_led_disassociate(priv);
1834         /*
1835          * inform the ucode that there is no longer an
1836          * association and that no more packets should be
1837          * sent
1838          */
1839         priv->staging_rxon.filter_flags &=
1840                 ~RXON_FILTER_ASSOC_MSK;
1841         priv->staging_rxon.assoc_id = 0;
1842         iwlcore_commit_rxon(priv);
1843 }
1844
1845 void iwl_bss_info_changed(struct ieee80211_hw *hw,
1846                           struct ieee80211_vif *vif,
1847                           struct ieee80211_bss_conf *bss_conf,
1848                           u32 changes)
1849 {
1850         struct iwl_priv *priv = hw->priv;
1851         int ret;
1852
1853         IWL_DEBUG_MAC80211(priv, "changes = 0x%X\n", changes);
1854
1855         if (!iwl_is_alive(priv))
1856                 return;
1857
1858         mutex_lock(&priv->mutex);
1859
1860         if (changes & BSS_CHANGED_BEACON && vif->type == NL80211_IFTYPE_AP) {
1861                 dev_kfree_skb(priv->ibss_beacon);
1862                 priv->ibss_beacon = ieee80211_beacon_get(hw, vif);
1863         }
1864
1865         if (changes & BSS_CHANGED_BEACON_INT) {
1866                 priv->beacon_int = bss_conf->beacon_int;
1867                 /* TODO: in AP mode, do something to make this take effect */
1868         }
1869
1870         if (changes & BSS_CHANGED_BSSID) {
1871                 IWL_DEBUG_MAC80211(priv, "BSSID %pM\n", bss_conf->bssid);
1872
1873                 /*
1874                  * If there is currently a HW scan going on in the
1875                  * background then we need to cancel it else the RXON
1876                  * below/in post_associate will fail.
1877                  */
1878                 if (iwl_scan_cancel_timeout(priv, 100)) {
1879                         IWL_WARN(priv, "Aborted scan still in progress after 100ms\n");
1880                         IWL_DEBUG_MAC80211(priv, "leaving - scan abort failed.\n");
1881                         mutex_unlock(&priv->mutex);
1882                         return;
1883                 }
1884
1885                 /* mac80211 only sets assoc when in STATION mode */
1886                 if (vif->type == NL80211_IFTYPE_ADHOC || bss_conf->assoc) {
1887                         memcpy(priv->staging_rxon.bssid_addr,
1888                                bss_conf->bssid, ETH_ALEN);
1889
1890                         /* currently needed in a few places */
1891                         memcpy(priv->bssid, bss_conf->bssid, ETH_ALEN);
1892                 } else {
1893                         priv->staging_rxon.filter_flags &=
1894                                 ~RXON_FILTER_ASSOC_MSK;
1895                 }
1896
1897         }
1898
1899         /*
1900          * This needs to be after setting the BSSID in case
1901          * mac80211 decides to do both changes at once because
1902          * it will invoke post_associate.
1903          */
1904         if (vif->type == NL80211_IFTYPE_ADHOC &&
1905             changes & BSS_CHANGED_BEACON) {
1906                 struct sk_buff *beacon = ieee80211_beacon_get(hw, vif);
1907
1908                 if (beacon)
1909                         iwl_mac_beacon_update(hw, beacon);
1910         }
1911
1912         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
1913                 IWL_DEBUG_MAC80211(priv, "ERP_PREAMBLE %d\n",
1914                                    bss_conf->use_short_preamble);
1915                 if (bss_conf->use_short_preamble)
1916                         priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
1917                 else
1918                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
1919         }
1920
1921         if (changes & BSS_CHANGED_ERP_CTS_PROT) {
1922                 IWL_DEBUG_MAC80211(priv, "ERP_CTS %d\n", bss_conf->use_cts_prot);
1923                 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
1924                         priv->staging_rxon.flags |= RXON_FLG_TGG_PROTECT_MSK;
1925                 else
1926                         priv->staging_rxon.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
1927         }
1928
1929         if (changes & BSS_CHANGED_BASIC_RATES) {
1930                 /* XXX use this information
1931                  *
1932                  * To do that, remove code from iwl_set_rate() and put something
1933                  * like this here:
1934                  *
1935                 if (A-band)
1936                         priv->staging_rxon.ofdm_basic_rates =
1937                                 bss_conf->basic_rates;
1938                 else
1939                         priv->staging_rxon.ofdm_basic_rates =
1940                                 bss_conf->basic_rates >> 4;
1941                         priv->staging_rxon.cck_basic_rates =
1942                                 bss_conf->basic_rates & 0xF;
1943                  */
1944         }
1945
1946         if (changes & BSS_CHANGED_HT) {
1947                 iwl_ht_conf(priv, bss_conf);
1948
1949                 if (priv->cfg->ops->hcmd->set_rxon_chain)
1950                         priv->cfg->ops->hcmd->set_rxon_chain(priv);
1951         }
1952
1953         if (changes & BSS_CHANGED_ASSOC) {
1954                 IWL_DEBUG_MAC80211(priv, "ASSOC %d\n", bss_conf->assoc);
1955                 if (bss_conf->assoc) {
1956                         priv->assoc_id = bss_conf->aid;
1957                         priv->beacon_int = bss_conf->beacon_int;
1958                         priv->timestamp = bss_conf->timestamp;
1959                         priv->assoc_capability = bss_conf->assoc_capability;
1960
1961                         iwl_led_associate(priv);
1962
1963                         if (!iwl_is_rfkill(priv))
1964                                 priv->cfg->ops->lib->post_associate(priv);
1965                 } else
1966                         iwl_set_no_assoc(priv);
1967         }
1968
1969         if (changes && iwl_is_associated(priv) && priv->assoc_id) {
1970                 IWL_DEBUG_MAC80211(priv, "Changes (%#x) while associated\n",
1971                                    changes);
1972                 ret = iwl_send_rxon_assoc(priv);
1973                 if (!ret) {
1974                         /* Sync active_rxon with latest change. */
1975                         memcpy((void *)&priv->active_rxon,
1976                                 &priv->staging_rxon,
1977                                 sizeof(struct iwl_rxon_cmd));
1978                 }
1979         }
1980
1981         if (changes & BSS_CHANGED_BEACON_ENABLED) {
1982                 if (vif->bss_conf.enable_beacon) {
1983                         memcpy(priv->staging_rxon.bssid_addr,
1984                                bss_conf->bssid, ETH_ALEN);
1985                         memcpy(priv->bssid, bss_conf->bssid, ETH_ALEN);
1986                         iwlcore_config_ap(priv);
1987                 } else
1988                         iwl_set_no_assoc(priv);
1989         }
1990
1991         mutex_unlock(&priv->mutex);
1992
1993         IWL_DEBUG_MAC80211(priv, "leave\n");
1994 }
1995 EXPORT_SYMBOL(iwl_bss_info_changed);
1996
1997 int iwl_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb)
1998 {
1999         struct iwl_priv *priv = hw->priv;
2000         unsigned long flags;
2001         __le64 timestamp;
2002
2003         IWL_DEBUG_MAC80211(priv, "enter\n");
2004
2005         if (!iwl_is_ready_rf(priv)) {
2006                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
2007                 return -EIO;
2008         }
2009
2010         spin_lock_irqsave(&priv->lock, flags);
2011
2012         if (priv->ibss_beacon)
2013                 dev_kfree_skb(priv->ibss_beacon);
2014
2015         priv->ibss_beacon = skb;
2016
2017         priv->assoc_id = 0;
2018         timestamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
2019         priv->timestamp = le64_to_cpu(timestamp);
2020
2021         IWL_DEBUG_MAC80211(priv, "leave\n");
2022         spin_unlock_irqrestore(&priv->lock, flags);
2023
2024         priv->cfg->ops->lib->post_associate(priv);
2025
2026         return 0;
2027 }
2028 EXPORT_SYMBOL(iwl_mac_beacon_update);
2029
2030 static int iwl_set_mode(struct iwl_priv *priv, struct ieee80211_vif *vif)
2031 {
2032         iwl_connection_init_rx_config(priv, vif->type);
2033
2034         if (priv->cfg->ops->hcmd->set_rxon_chain)
2035                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
2036
2037         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2038
2039         return iwlcore_commit_rxon(priv);
2040 }
2041
2042 int iwl_mac_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
2043 {
2044         struct iwl_priv *priv = hw->priv;
2045         int err = 0;
2046
2047         IWL_DEBUG_MAC80211(priv, "enter: type %d\n", vif->type);
2048
2049         mutex_lock(&priv->mutex);
2050
2051         if (WARN_ON(!iwl_is_ready_rf(priv))) {
2052                 err = -EINVAL;
2053                 goto out;
2054         }
2055
2056         if (priv->vif) {
2057                 IWL_DEBUG_MAC80211(priv, "leave - vif != NULL\n");
2058                 err = -EOPNOTSUPP;
2059                 goto out;
2060         }
2061
2062         priv->vif = vif;
2063         priv->iw_mode = vif->type;
2064
2065         IWL_DEBUG_MAC80211(priv, "Set %pM\n", vif->addr);
2066         memcpy(priv->mac_addr, vif->addr, ETH_ALEN);
2067
2068         err = iwl_set_mode(priv, vif);
2069         if (err)
2070                 goto out_err;
2071
2072         /* Add the broadcast address so we can send broadcast frames */
2073         priv->cfg->ops->lib->add_bcast_station(priv);
2074
2075         goto out;
2076
2077  out_err:
2078         priv->vif = NULL;
2079         priv->iw_mode = NL80211_IFTYPE_STATION;
2080  out:
2081         mutex_unlock(&priv->mutex);
2082
2083         IWL_DEBUG_MAC80211(priv, "leave\n");
2084         return err;
2085 }
2086 EXPORT_SYMBOL(iwl_mac_add_interface);
2087
2088 void iwl_mac_remove_interface(struct ieee80211_hw *hw,
2089                               struct ieee80211_vif *vif)
2090 {
2091         struct iwl_priv *priv = hw->priv;
2092
2093         IWL_DEBUG_MAC80211(priv, "enter\n");
2094
2095         mutex_lock(&priv->mutex);
2096
2097         iwl_clear_ucode_stations(priv, true);
2098
2099         if (iwl_is_ready_rf(priv)) {
2100                 iwl_scan_cancel_timeout(priv, 100);
2101                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2102                 iwlcore_commit_rxon(priv);
2103         }
2104         if (priv->vif == vif) {
2105                 priv->vif = NULL;
2106                 memset(priv->bssid, 0, ETH_ALEN);
2107         }
2108         mutex_unlock(&priv->mutex);
2109
2110         IWL_DEBUG_MAC80211(priv, "leave\n");
2111
2112 }
2113 EXPORT_SYMBOL(iwl_mac_remove_interface);
2114
2115 /**
2116  * iwl_mac_config - mac80211 config callback
2117  */
2118 int iwl_mac_config(struct ieee80211_hw *hw, u32 changed)
2119 {
2120         struct iwl_priv *priv = hw->priv;
2121         const struct iwl_channel_info *ch_info;
2122         struct ieee80211_conf *conf = &hw->conf;
2123         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
2124         unsigned long flags = 0;
2125         int ret = 0;
2126         u16 ch;
2127         int scan_active = 0;
2128
2129         mutex_lock(&priv->mutex);
2130
2131         IWL_DEBUG_MAC80211(priv, "enter to channel %d changed 0x%X\n",
2132                                         conf->channel->hw_value, changed);
2133
2134         if (unlikely(!priv->cfg->mod_params->disable_hw_scan &&
2135                         test_bit(STATUS_SCANNING, &priv->status))) {
2136                 scan_active = 1;
2137                 IWL_DEBUG_MAC80211(priv, "leave - scanning\n");
2138         }
2139
2140         if (changed & (IEEE80211_CONF_CHANGE_SMPS |
2141                        IEEE80211_CONF_CHANGE_CHANNEL)) {
2142                 /* mac80211 uses static for non-HT which is what we want */
2143                 priv->current_ht_config.smps = conf->smps_mode;
2144
2145                 /*
2146                  * Recalculate chain counts.
2147                  *
2148                  * If monitor mode is enabled then mac80211 will
2149                  * set up the SM PS mode to OFF if an HT channel is
2150                  * configured.
2151                  */
2152                 if (priv->cfg->ops->hcmd->set_rxon_chain)
2153                         priv->cfg->ops->hcmd->set_rxon_chain(priv);
2154         }
2155
2156         /* during scanning mac80211 will delay channel setting until
2157          * scan finish with changed = 0
2158          */
2159         if (!changed || (changed & IEEE80211_CONF_CHANGE_CHANNEL)) {
2160                 if (scan_active)
2161                         goto set_ch_out;
2162
2163                 ch = ieee80211_frequency_to_channel(conf->channel->center_freq);
2164                 ch_info = iwl_get_channel_info(priv, conf->channel->band, ch);
2165                 if (!is_channel_valid(ch_info)) {
2166                         IWL_DEBUG_MAC80211(priv, "leave - invalid channel\n");
2167                         ret = -EINVAL;
2168                         goto set_ch_out;
2169                 }
2170
2171                 spin_lock_irqsave(&priv->lock, flags);
2172
2173                 /* Configure HT40 channels */
2174                 ht_conf->is_ht = conf_is_ht(conf);
2175                 if (ht_conf->is_ht) {
2176                         if (conf_is_ht40_minus(conf)) {
2177                                 ht_conf->extension_chan_offset =
2178                                         IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2179                                 ht_conf->is_40mhz = true;
2180                         } else if (conf_is_ht40_plus(conf)) {
2181                                 ht_conf->extension_chan_offset =
2182                                         IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2183                                 ht_conf->is_40mhz = true;
2184                         } else {
2185                                 ht_conf->extension_chan_offset =
2186                                         IEEE80211_HT_PARAM_CHA_SEC_NONE;
2187                                 ht_conf->is_40mhz = false;
2188                         }
2189                 } else
2190                         ht_conf->is_40mhz = false;
2191                 /* Default to no protection. Protection mode will later be set
2192                  * from BSS config in iwl_ht_conf */
2193                 ht_conf->ht_protection = IEEE80211_HT_OP_MODE_PROTECTION_NONE;
2194
2195                 /* if we are switching from ht to 2.4 clear flags
2196                  * from any ht related info since 2.4 does not
2197                  * support ht */
2198                 if ((le16_to_cpu(priv->staging_rxon.channel) != ch))
2199                         priv->staging_rxon.flags = 0;
2200
2201                 iwl_set_rxon_channel(priv, conf->channel);
2202                 iwl_set_rxon_ht(priv, ht_conf);
2203
2204                 iwl_set_flags_for_band(priv, conf->channel->band);
2205                 spin_unlock_irqrestore(&priv->lock, flags);
2206                 if (iwl_is_associated(priv) &&
2207                     (le16_to_cpu(priv->active_rxon.channel) != ch) &&
2208                     priv->cfg->ops->lib->set_channel_switch) {
2209                         iwl_set_rate(priv);
2210                         /*
2211                          * at this point, staging_rxon has the
2212                          * configuration for channel switch
2213                          */
2214                         ret = priv->cfg->ops->lib->set_channel_switch(priv,
2215                                 ch);
2216                         if (!ret) {
2217                                 iwl_print_rx_config_cmd(priv);
2218                                 goto out;
2219                         }
2220                         priv->switch_rxon.switch_in_progress = false;
2221                 }
2222  set_ch_out:
2223                 /* The list of supported rates and rate mask can be different
2224                  * for each band; since the band may have changed, reset
2225                  * the rate mask to what mac80211 lists */
2226                 iwl_set_rate(priv);
2227         }
2228
2229         if (changed & (IEEE80211_CONF_CHANGE_PS |
2230                         IEEE80211_CONF_CHANGE_IDLE)) {
2231                 ret = iwl_power_update_mode(priv, false);
2232                 if (ret)
2233                         IWL_DEBUG_MAC80211(priv, "Error setting sleep level\n");
2234         }
2235
2236         if (changed & IEEE80211_CONF_CHANGE_POWER) {
2237                 IWL_DEBUG_MAC80211(priv, "TX Power old=%d new=%d\n",
2238                         priv->tx_power_user_lmt, conf->power_level);
2239
2240                 iwl_set_tx_power(priv, conf->power_level, false);
2241         }
2242
2243         if (changed & IEEE80211_CONF_CHANGE_QOS) {
2244                 bool qos_active = !!(conf->flags & IEEE80211_CONF_QOS);
2245
2246                 spin_lock_irqsave(&priv->lock, flags);
2247                 priv->qos_data.qos_active = qos_active;
2248                 iwl_update_qos(priv);
2249                 spin_unlock_irqrestore(&priv->lock, flags);
2250         }
2251
2252         if (!iwl_is_ready(priv)) {
2253                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2254                 goto out;
2255         }
2256
2257         if (scan_active)
2258                 goto out;
2259
2260         if (memcmp(&priv->active_rxon,
2261                    &priv->staging_rxon, sizeof(priv->staging_rxon)))
2262                 iwlcore_commit_rxon(priv);
2263         else
2264                 IWL_DEBUG_INFO(priv, "Not re-sending same RXON configuration.\n");
2265
2266
2267 out:
2268         IWL_DEBUG_MAC80211(priv, "leave\n");
2269         mutex_unlock(&priv->mutex);
2270         return ret;
2271 }
2272 EXPORT_SYMBOL(iwl_mac_config);
2273
2274 void iwl_mac_reset_tsf(struct ieee80211_hw *hw)
2275 {
2276         struct iwl_priv *priv = hw->priv;
2277         unsigned long flags;
2278
2279         mutex_lock(&priv->mutex);
2280         IWL_DEBUG_MAC80211(priv, "enter\n");
2281
2282         spin_lock_irqsave(&priv->lock, flags);
2283         memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_config));
2284         spin_unlock_irqrestore(&priv->lock, flags);
2285
2286         spin_lock_irqsave(&priv->lock, flags);
2287         priv->assoc_id = 0;
2288         priv->assoc_capability = 0;
2289
2290         /* new association get rid of ibss beacon skb */
2291         if (priv->ibss_beacon)
2292                 dev_kfree_skb(priv->ibss_beacon);
2293
2294         priv->ibss_beacon = NULL;
2295
2296         priv->beacon_int = priv->vif->bss_conf.beacon_int;
2297         priv->timestamp = 0;
2298
2299         spin_unlock_irqrestore(&priv->lock, flags);
2300
2301         if (!iwl_is_ready_rf(priv)) {
2302                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2303                 mutex_unlock(&priv->mutex);
2304                 return;
2305         }
2306
2307         /* we are restarting association process
2308          * clear RXON_FILTER_ASSOC_MSK bit
2309          */
2310         iwl_scan_cancel_timeout(priv, 100);
2311         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2312         iwlcore_commit_rxon(priv);
2313
2314         iwl_set_rate(priv);
2315
2316         mutex_unlock(&priv->mutex);
2317
2318         IWL_DEBUG_MAC80211(priv, "leave\n");
2319 }
2320 EXPORT_SYMBOL(iwl_mac_reset_tsf);
2321
2322 int iwl_alloc_txq_mem(struct iwl_priv *priv)
2323 {
2324         if (!priv->txq)
2325                 priv->txq = kzalloc(
2326                         sizeof(struct iwl_tx_queue) * priv->cfg->num_of_queues,
2327                         GFP_KERNEL);
2328         if (!priv->txq) {
2329                 IWL_ERR(priv, "Not enough memory for txq\n");
2330                 return -ENOMEM;
2331         }
2332         return 0;
2333 }
2334 EXPORT_SYMBOL(iwl_alloc_txq_mem);
2335
2336 void iwl_free_txq_mem(struct iwl_priv *priv)
2337 {
2338         kfree(priv->txq);
2339         priv->txq = NULL;
2340 }
2341 EXPORT_SYMBOL(iwl_free_txq_mem);
2342
2343 int iwl_send_wimax_coex(struct iwl_priv *priv)
2344 {
2345         struct iwl_wimax_coex_cmd coex_cmd;
2346
2347         if (priv->cfg->support_wimax_coexist) {
2348                 /* UnMask wake up src at associated sleep */
2349                 coex_cmd.flags = COEX_FLAGS_ASSOC_WA_UNMASK_MSK;
2350
2351                 /* UnMask wake up src at unassociated sleep */
2352                 coex_cmd.flags |= COEX_FLAGS_UNASSOC_WA_UNMASK_MSK;
2353                 memcpy(coex_cmd.sta_prio, cu_priorities,
2354                         sizeof(struct iwl_wimax_coex_event_entry) *
2355                          COEX_NUM_OF_EVENTS);
2356
2357                 /* enabling the coexistence feature */
2358                 coex_cmd.flags |= COEX_FLAGS_COEX_ENABLE_MSK;
2359
2360                 /* enabling the priorities tables */
2361                 coex_cmd.flags |= COEX_FLAGS_STA_TABLE_VALID_MSK;
2362         } else {
2363                 /* coexistence is disabled */
2364                 memset(&coex_cmd, 0, sizeof(coex_cmd));
2365         }
2366         return iwl_send_cmd_pdu(priv, COEX_PRIORITY_TABLE_CMD,
2367                                 sizeof(coex_cmd), &coex_cmd);
2368 }
2369 EXPORT_SYMBOL(iwl_send_wimax_coex);
2370
2371 #ifdef CONFIG_IWLWIFI_DEBUGFS
2372
2373 #define IWL_TRAFFIC_DUMP_SIZE   (IWL_TRAFFIC_ENTRY_SIZE * IWL_TRAFFIC_ENTRIES)
2374
2375 void iwl_reset_traffic_log(struct iwl_priv *priv)
2376 {
2377         priv->tx_traffic_idx = 0;
2378         priv->rx_traffic_idx = 0;
2379         if (priv->tx_traffic)
2380                 memset(priv->tx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
2381         if (priv->rx_traffic)
2382                 memset(priv->rx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
2383 }
2384
2385 int iwl_alloc_traffic_mem(struct iwl_priv *priv)
2386 {
2387         u32 traffic_size = IWL_TRAFFIC_DUMP_SIZE;
2388
2389         if (iwl_debug_level & IWL_DL_TX) {
2390                 if (!priv->tx_traffic) {
2391                         priv->tx_traffic =
2392                                 kzalloc(traffic_size, GFP_KERNEL);
2393                         if (!priv->tx_traffic)
2394                                 return -ENOMEM;
2395                 }
2396         }
2397         if (iwl_debug_level & IWL_DL_RX) {
2398                 if (!priv->rx_traffic) {
2399                         priv->rx_traffic =
2400                                 kzalloc(traffic_size, GFP_KERNEL);
2401                         if (!priv->rx_traffic)
2402                                 return -ENOMEM;
2403                 }
2404         }
2405         iwl_reset_traffic_log(priv);
2406         return 0;
2407 }
2408 EXPORT_SYMBOL(iwl_alloc_traffic_mem);
2409
2410 void iwl_free_traffic_mem(struct iwl_priv *priv)
2411 {
2412         kfree(priv->tx_traffic);
2413         priv->tx_traffic = NULL;
2414
2415         kfree(priv->rx_traffic);
2416         priv->rx_traffic = NULL;
2417 }
2418 EXPORT_SYMBOL(iwl_free_traffic_mem);
2419
2420 void iwl_dbg_log_tx_data_frame(struct iwl_priv *priv,
2421                       u16 length, struct ieee80211_hdr *header)
2422 {
2423         __le16 fc;
2424         u16 len;
2425
2426         if (likely(!(iwl_debug_level & IWL_DL_TX)))
2427                 return;
2428
2429         if (!priv->tx_traffic)
2430                 return;
2431
2432         fc = header->frame_control;
2433         if (ieee80211_is_data(fc)) {
2434                 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
2435                        ? IWL_TRAFFIC_ENTRY_SIZE : length;
2436                 memcpy((priv->tx_traffic +
2437                        (priv->tx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
2438                        header, len);
2439                 priv->tx_traffic_idx =
2440                         (priv->tx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
2441         }
2442 }
2443 EXPORT_SYMBOL(iwl_dbg_log_tx_data_frame);
2444
2445 void iwl_dbg_log_rx_data_frame(struct iwl_priv *priv,
2446                       u16 length, struct ieee80211_hdr *header)
2447 {
2448         __le16 fc;
2449         u16 len;
2450
2451         if (likely(!(iwl_debug_level & IWL_DL_RX)))
2452                 return;
2453
2454         if (!priv->rx_traffic)
2455                 return;
2456
2457         fc = header->frame_control;
2458         if (ieee80211_is_data(fc)) {
2459                 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
2460                        ? IWL_TRAFFIC_ENTRY_SIZE : length;
2461                 memcpy((priv->rx_traffic +
2462                        (priv->rx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
2463                        header, len);
2464                 priv->rx_traffic_idx =
2465                         (priv->rx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
2466         }
2467 }
2468 EXPORT_SYMBOL(iwl_dbg_log_rx_data_frame);
2469
2470 const char *get_mgmt_string(int cmd)
2471 {
2472         switch (cmd) {
2473                 IWL_CMD(MANAGEMENT_ASSOC_REQ);
2474                 IWL_CMD(MANAGEMENT_ASSOC_RESP);
2475                 IWL_CMD(MANAGEMENT_REASSOC_REQ);
2476                 IWL_CMD(MANAGEMENT_REASSOC_RESP);
2477                 IWL_CMD(MANAGEMENT_PROBE_REQ);
2478                 IWL_CMD(MANAGEMENT_PROBE_RESP);
2479                 IWL_CMD(MANAGEMENT_BEACON);
2480                 IWL_CMD(MANAGEMENT_ATIM);
2481                 IWL_CMD(MANAGEMENT_DISASSOC);
2482                 IWL_CMD(MANAGEMENT_AUTH);
2483                 IWL_CMD(MANAGEMENT_DEAUTH);
2484                 IWL_CMD(MANAGEMENT_ACTION);
2485         default:
2486                 return "UNKNOWN";
2487
2488         }
2489 }
2490
2491 const char *get_ctrl_string(int cmd)
2492 {
2493         switch (cmd) {
2494                 IWL_CMD(CONTROL_BACK_REQ);
2495                 IWL_CMD(CONTROL_BACK);
2496                 IWL_CMD(CONTROL_PSPOLL);
2497                 IWL_CMD(CONTROL_RTS);
2498                 IWL_CMD(CONTROL_CTS);
2499                 IWL_CMD(CONTROL_ACK);
2500                 IWL_CMD(CONTROL_CFEND);
2501                 IWL_CMD(CONTROL_CFENDACK);
2502         default:
2503                 return "UNKNOWN";
2504
2505         }
2506 }
2507
2508 void iwl_clear_traffic_stats(struct iwl_priv *priv)
2509 {
2510         memset(&priv->tx_stats, 0, sizeof(struct traffic_stats));
2511         memset(&priv->rx_stats, 0, sizeof(struct traffic_stats));
2512         priv->led_tpt = 0;
2513 }
2514
2515 /*
2516  * if CONFIG_IWLWIFI_DEBUGFS defined, iwl_update_stats function will
2517  * record all the MGMT, CTRL and DATA pkt for both TX and Rx pass.
2518  * Use debugFs to display the rx/rx_statistics
2519  * if CONFIG_IWLWIFI_DEBUGFS not being defined, then no MGMT and CTRL
2520  * information will be recorded, but DATA pkt still will be recorded
2521  * for the reason of iwl_led.c need to control the led blinking based on
2522  * number of tx and rx data.
2523  *
2524  */
2525 void iwl_update_stats(struct iwl_priv *priv, bool is_tx, __le16 fc, u16 len)
2526 {
2527         struct traffic_stats    *stats;
2528
2529         if (is_tx)
2530                 stats = &priv->tx_stats;
2531         else
2532                 stats = &priv->rx_stats;
2533
2534         if (ieee80211_is_mgmt(fc)) {
2535                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
2536                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
2537                         stats->mgmt[MANAGEMENT_ASSOC_REQ]++;
2538                         break;
2539                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP):
2540                         stats->mgmt[MANAGEMENT_ASSOC_RESP]++;
2541                         break;
2542                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
2543                         stats->mgmt[MANAGEMENT_REASSOC_REQ]++;
2544                         break;
2545                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP):
2546                         stats->mgmt[MANAGEMENT_REASSOC_RESP]++;
2547                         break;
2548                 case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ):
2549                         stats->mgmt[MANAGEMENT_PROBE_REQ]++;
2550                         break;
2551                 case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP):
2552                         stats->mgmt[MANAGEMENT_PROBE_RESP]++;
2553                         break;
2554                 case cpu_to_le16(IEEE80211_STYPE_BEACON):
2555                         stats->mgmt[MANAGEMENT_BEACON]++;
2556                         break;
2557                 case cpu_to_le16(IEEE80211_STYPE_ATIM):
2558                         stats->mgmt[MANAGEMENT_ATIM]++;
2559                         break;
2560                 case cpu_to_le16(IEEE80211_STYPE_DISASSOC):
2561                         stats->mgmt[MANAGEMENT_DISASSOC]++;
2562                         break;
2563                 case cpu_to_le16(IEEE80211_STYPE_AUTH):
2564                         stats->mgmt[MANAGEMENT_AUTH]++;
2565                         break;
2566                 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
2567                         stats->mgmt[MANAGEMENT_DEAUTH]++;
2568                         break;
2569                 case cpu_to_le16(IEEE80211_STYPE_ACTION):
2570                         stats->mgmt[MANAGEMENT_ACTION]++;
2571                         break;
2572                 }
2573         } else if (ieee80211_is_ctl(fc)) {
2574                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
2575                 case cpu_to_le16(IEEE80211_STYPE_BACK_REQ):
2576                         stats->ctrl[CONTROL_BACK_REQ]++;
2577                         break;
2578                 case cpu_to_le16(IEEE80211_STYPE_BACK):
2579                         stats->ctrl[CONTROL_BACK]++;
2580                         break;
2581                 case cpu_to_le16(IEEE80211_STYPE_PSPOLL):
2582                         stats->ctrl[CONTROL_PSPOLL]++;
2583                         break;
2584                 case cpu_to_le16(IEEE80211_STYPE_RTS):
2585                         stats->ctrl[CONTROL_RTS]++;
2586                         break;
2587                 case cpu_to_le16(IEEE80211_STYPE_CTS):
2588                         stats->ctrl[CONTROL_CTS]++;
2589                         break;
2590                 case cpu_to_le16(IEEE80211_STYPE_ACK):
2591                         stats->ctrl[CONTROL_ACK]++;
2592                         break;
2593                 case cpu_to_le16(IEEE80211_STYPE_CFEND):
2594                         stats->ctrl[CONTROL_CFEND]++;
2595                         break;
2596                 case cpu_to_le16(IEEE80211_STYPE_CFENDACK):
2597                         stats->ctrl[CONTROL_CFENDACK]++;
2598                         break;
2599                 }
2600         } else {
2601                 /* data */
2602                 stats->data_cnt++;
2603                 stats->data_bytes += len;
2604         }
2605         iwl_leds_background(priv);
2606 }
2607 EXPORT_SYMBOL(iwl_update_stats);
2608 #endif
2609
2610 const static char *get_csr_string(int cmd)
2611 {
2612         switch (cmd) {
2613                 IWL_CMD(CSR_HW_IF_CONFIG_REG);
2614                 IWL_CMD(CSR_INT_COALESCING);
2615                 IWL_CMD(CSR_INT);
2616                 IWL_CMD(CSR_INT_MASK);
2617                 IWL_CMD(CSR_FH_INT_STATUS);
2618                 IWL_CMD(CSR_GPIO_IN);
2619                 IWL_CMD(CSR_RESET);
2620                 IWL_CMD(CSR_GP_CNTRL);
2621                 IWL_CMD(CSR_HW_REV);
2622                 IWL_CMD(CSR_EEPROM_REG);
2623                 IWL_CMD(CSR_EEPROM_GP);
2624                 IWL_CMD(CSR_OTP_GP_REG);
2625                 IWL_CMD(CSR_GIO_REG);
2626                 IWL_CMD(CSR_GP_UCODE_REG);
2627                 IWL_CMD(CSR_GP_DRIVER_REG);
2628                 IWL_CMD(CSR_UCODE_DRV_GP1);
2629                 IWL_CMD(CSR_UCODE_DRV_GP2);
2630                 IWL_CMD(CSR_LED_REG);
2631                 IWL_CMD(CSR_DRAM_INT_TBL_REG);
2632                 IWL_CMD(CSR_GIO_CHICKEN_BITS);
2633                 IWL_CMD(CSR_ANA_PLL_CFG);
2634                 IWL_CMD(CSR_HW_REV_WA_REG);
2635                 IWL_CMD(CSR_DBG_HPET_MEM_REG);
2636         default:
2637                 return "UNKNOWN";
2638
2639         }
2640 }
2641
2642 void iwl_dump_csr(struct iwl_priv *priv)
2643 {
2644         int i;
2645         u32 csr_tbl[] = {
2646                 CSR_HW_IF_CONFIG_REG,
2647                 CSR_INT_COALESCING,
2648                 CSR_INT,
2649                 CSR_INT_MASK,
2650                 CSR_FH_INT_STATUS,
2651                 CSR_GPIO_IN,
2652                 CSR_RESET,
2653                 CSR_GP_CNTRL,
2654                 CSR_HW_REV,
2655                 CSR_EEPROM_REG,
2656                 CSR_EEPROM_GP,
2657                 CSR_OTP_GP_REG,
2658                 CSR_GIO_REG,
2659                 CSR_GP_UCODE_REG,
2660                 CSR_GP_DRIVER_REG,
2661                 CSR_UCODE_DRV_GP1,
2662                 CSR_UCODE_DRV_GP2,
2663                 CSR_LED_REG,
2664                 CSR_DRAM_INT_TBL_REG,
2665                 CSR_GIO_CHICKEN_BITS,
2666                 CSR_ANA_PLL_CFG,
2667                 CSR_HW_REV_WA_REG,
2668                 CSR_DBG_HPET_MEM_REG
2669         };
2670         IWL_ERR(priv, "CSR values:\n");
2671         IWL_ERR(priv, "(2nd byte of CSR_INT_COALESCING is "
2672                 "CSR_INT_PERIODIC_REG)\n");
2673         for (i = 0; i <  ARRAY_SIZE(csr_tbl); i++) {
2674                 IWL_ERR(priv, "  %25s: 0X%08x\n",
2675                         get_csr_string(csr_tbl[i]),
2676                         iwl_read32(priv, csr_tbl[i]));
2677         }
2678 }
2679 EXPORT_SYMBOL(iwl_dump_csr);
2680
2681 const static char *get_fh_string(int cmd)
2682 {
2683         switch (cmd) {
2684                 IWL_CMD(FH_RSCSR_CHNL0_STTS_WPTR_REG);
2685                 IWL_CMD(FH_RSCSR_CHNL0_RBDCB_BASE_REG);
2686                 IWL_CMD(FH_RSCSR_CHNL0_WPTR);
2687                 IWL_CMD(FH_MEM_RCSR_CHNL0_CONFIG_REG);
2688                 IWL_CMD(FH_MEM_RSSR_SHARED_CTRL_REG);
2689                 IWL_CMD(FH_MEM_RSSR_RX_STATUS_REG);
2690                 IWL_CMD(FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV);
2691                 IWL_CMD(FH_TSSR_TX_STATUS_REG);
2692                 IWL_CMD(FH_TSSR_TX_ERROR_REG);
2693         default:
2694                 return "UNKNOWN";
2695
2696         }
2697 }
2698
2699 int iwl_dump_fh(struct iwl_priv *priv, char **buf, bool display)
2700 {
2701         int i;
2702 #ifdef CONFIG_IWLWIFI_DEBUG
2703         int pos = 0;
2704         size_t bufsz = 0;
2705 #endif
2706         u32 fh_tbl[] = {
2707                 FH_RSCSR_CHNL0_STTS_WPTR_REG,
2708                 FH_RSCSR_CHNL0_RBDCB_BASE_REG,
2709                 FH_RSCSR_CHNL0_WPTR,
2710                 FH_MEM_RCSR_CHNL0_CONFIG_REG,
2711                 FH_MEM_RSSR_SHARED_CTRL_REG,
2712                 FH_MEM_RSSR_RX_STATUS_REG,
2713                 FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV,
2714                 FH_TSSR_TX_STATUS_REG,
2715                 FH_TSSR_TX_ERROR_REG
2716         };
2717 #ifdef CONFIG_IWLWIFI_DEBUG
2718         if (display) {
2719                 bufsz = ARRAY_SIZE(fh_tbl) * 48 + 40;
2720                 *buf = kmalloc(bufsz, GFP_KERNEL);
2721                 if (!*buf)
2722                         return -ENOMEM;
2723                 pos += scnprintf(*buf + pos, bufsz - pos,
2724                                 "FH register values:\n");
2725                 for (i = 0; i < ARRAY_SIZE(fh_tbl); i++) {
2726                         pos += scnprintf(*buf + pos, bufsz - pos,
2727                                 "  %34s: 0X%08x\n",
2728                                 get_fh_string(fh_tbl[i]),
2729                                 iwl_read_direct32(priv, fh_tbl[i]));
2730                 }
2731                 return pos;
2732         }
2733 #endif
2734         IWL_ERR(priv, "FH register values:\n");
2735         for (i = 0; i <  ARRAY_SIZE(fh_tbl); i++) {
2736                 IWL_ERR(priv, "  %34s: 0X%08x\n",
2737                         get_fh_string(fh_tbl[i]),
2738                         iwl_read_direct32(priv, fh_tbl[i]));
2739         }
2740         return 0;
2741 }
2742 EXPORT_SYMBOL(iwl_dump_fh);
2743
2744 static void iwl_force_rf_reset(struct iwl_priv *priv)
2745 {
2746         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2747                 return;
2748
2749         if (!iwl_is_associated(priv)) {
2750                 IWL_DEBUG_SCAN(priv, "force reset rejected: not associated\n");
2751                 return;
2752         }
2753         /*
2754          * There is no easy and better way to force reset the radio,
2755          * the only known method is switching channel which will force to
2756          * reset and tune the radio.
2757          * Use internal short scan (single channel) operation to should
2758          * achieve this objective.
2759          * Driver should reset the radio when number of consecutive missed
2760          * beacon, or any other uCode error condition detected.
2761          */
2762         IWL_DEBUG_INFO(priv, "perform radio reset.\n");
2763         iwl_internal_short_hw_scan(priv);
2764 }
2765
2766
2767 int iwl_force_reset(struct iwl_priv *priv, int mode)
2768 {
2769         struct iwl_force_reset *force_reset;
2770
2771         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2772                 return -EINVAL;
2773
2774         if (mode >= IWL_MAX_FORCE_RESET) {
2775                 IWL_DEBUG_INFO(priv, "invalid reset request.\n");
2776                 return -EINVAL;
2777         }
2778         force_reset = &priv->force_reset[mode];
2779         force_reset->reset_request_count++;
2780         if (force_reset->last_force_reset_jiffies &&
2781             time_after(force_reset->last_force_reset_jiffies +
2782             force_reset->reset_duration, jiffies)) {
2783                 IWL_DEBUG_INFO(priv, "force reset rejected\n");
2784                 force_reset->reset_reject_count++;
2785                 return -EAGAIN;
2786         }
2787         force_reset->reset_success_count++;
2788         force_reset->last_force_reset_jiffies = jiffies;
2789         IWL_DEBUG_INFO(priv, "perform force reset (%d)\n", mode);
2790         switch (mode) {
2791         case IWL_RF_RESET:
2792                 iwl_force_rf_reset(priv);
2793                 break;
2794         case IWL_FW_RESET:
2795                 IWL_ERR(priv, "On demand firmware reload\n");
2796                 /* Set the FW error flag -- cleared on iwl_down */
2797                 set_bit(STATUS_FW_ERROR, &priv->status);
2798                 wake_up_interruptible(&priv->wait_command_queue);
2799                 /*
2800                  * Keep the restart process from trying to send host
2801                  * commands by clearing the INIT status bit
2802                  */
2803                 clear_bit(STATUS_READY, &priv->status);
2804                 queue_work(priv->workqueue, &priv->restart);
2805                 break;
2806         }
2807         return 0;
2808 }
2809 EXPORT_SYMBOL(iwl_force_reset);
2810
2811 /**
2812  * iwl_bg_monitor_recover - Timer callback to check for stuck queue and recover
2813  *
2814  * During normal condition (no queue is stuck), the timer is continually set to
2815  * execute every monitor_recover_period milliseconds after the last timer
2816  * expired.  When the queue read_ptr is at the same place, the timer is
2817  * shorten to 100mSecs.  This is
2818  *      1) to reduce the chance that the read_ptr may wrap around (not stuck)
2819  *      2) to detect the stuck queues quicker before the station and AP can
2820  *      disassociate each other.
2821  *
2822  * This function monitors all the tx queues and recover from it if any
2823  * of the queues are stuck.
2824  * 1. It first check the cmd queue for stuck conditions.  If it is stuck,
2825  *      it will recover by resetting the firmware and return.
2826  * 2. Then, it checks for station association.  If it associates it will check
2827  *      other queues.  If any queue is stuck, it will recover by resetting
2828  *      the firmware.
2829  * Note: It the number of times the queue read_ptr to be at the same place to
2830  *      be MAX_REPEAT+1 in order to consider to be stuck.
2831  */
2832 /*
2833  * The maximum number of times the read pointer of the tx queue at the
2834  * same place without considering to be stuck.
2835  */
2836 #define MAX_REPEAT      (2)
2837 static int iwl_check_stuck_queue(struct iwl_priv *priv, int cnt)
2838 {
2839         struct iwl_tx_queue *txq;
2840         struct iwl_queue *q;
2841
2842         txq = &priv->txq[cnt];
2843         q = &txq->q;
2844         /* queue is empty, skip */
2845         if (q->read_ptr != q->write_ptr) {
2846                 if (q->read_ptr == q->last_read_ptr) {
2847                         /* a queue has not been read from last time */
2848                         if (q->repeat_same_read_ptr > MAX_REPEAT) {
2849                                 IWL_ERR(priv,
2850                                         "queue %d stuck %d time. Fw reload.\n",
2851                                         q->id, q->repeat_same_read_ptr);
2852                                 q->repeat_same_read_ptr = 0;
2853                                 iwl_force_reset(priv, IWL_FW_RESET);
2854                         } else {
2855                                 q->repeat_same_read_ptr++;
2856                                 IWL_DEBUG_RADIO(priv,
2857                                                 "queue %d, not read %d time\n",
2858                                                 q->id,
2859                                                 q->repeat_same_read_ptr);
2860                                 mod_timer(&priv->monitor_recover, jiffies +
2861                                         msecs_to_jiffies(IWL_ONE_HUNDRED_MSECS));
2862                         }
2863                         return 1;
2864                 } else {
2865                         q->last_read_ptr = q->read_ptr;
2866                         q->repeat_same_read_ptr = 0;
2867                 }
2868         }
2869         return 0;
2870 }
2871
2872 void iwl_bg_monitor_recover(unsigned long data)
2873 {
2874         struct iwl_priv *priv = (struct iwl_priv *)data;
2875         int cnt;
2876
2877         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2878                 return;
2879
2880         /* monitor and check for stuck cmd queue */
2881         if (iwl_check_stuck_queue(priv, IWL_CMD_QUEUE_NUM))
2882                 return;
2883
2884         /* monitor and check for other stuck queues */
2885         if (iwl_is_associated(priv)) {
2886                 for (cnt = 0; cnt < priv->hw_params.max_txq_num; cnt++) {
2887                         /* skip as we already checked the command queue */
2888                         if (cnt == IWL_CMD_QUEUE_NUM)
2889                                 continue;
2890                         if (iwl_check_stuck_queue(priv, cnt))
2891                                 return;
2892                 }
2893         }
2894         /*
2895          * Reschedule the timer to occur in
2896          * priv->cfg->monitor_recover_period
2897          */
2898         mod_timer(&priv->monitor_recover,
2899                 jiffies + msecs_to_jiffies(priv->cfg->monitor_recover_period));
2900 }
2901 EXPORT_SYMBOL(iwl_bg_monitor_recover);
2902
2903 #ifdef CONFIG_PM
2904
2905 int iwl_pci_suspend(struct pci_dev *pdev, pm_message_t state)
2906 {
2907         struct iwl_priv *priv = pci_get_drvdata(pdev);
2908
2909         /*
2910          * This function is called when system goes into suspend state
2911          * mac80211 will call iwl_mac_stop() from the mac80211 suspend function
2912          * first but since iwl_mac_stop() has no knowledge of who the caller is,
2913          * it will not call apm_ops.stop() to stop the DMA operation.
2914          * Calling apm_ops.stop here to make sure we stop the DMA.
2915          */
2916         priv->cfg->ops->lib->apm_ops.stop(priv);
2917
2918         pci_save_state(pdev);
2919         pci_disable_device(pdev);
2920         pci_set_power_state(pdev, PCI_D3hot);
2921
2922         return 0;
2923 }
2924 EXPORT_SYMBOL(iwl_pci_suspend);
2925
2926 int iwl_pci_resume(struct pci_dev *pdev)
2927 {
2928         struct iwl_priv *priv = pci_get_drvdata(pdev);
2929         int ret;
2930
2931         /*
2932          * We disable the RETRY_TIMEOUT register (0x41) to keep
2933          * PCI Tx retries from interfering with C3 CPU state.
2934          */
2935         pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
2936
2937         pci_set_power_state(pdev, PCI_D0);
2938         ret = pci_enable_device(pdev);
2939         if (ret)
2940                 return ret;
2941         pci_restore_state(pdev);
2942         iwl_enable_interrupts(priv);
2943
2944         return 0;
2945 }
2946 EXPORT_SYMBOL(iwl_pci_resume);
2947
2948 #endif /* CONFIG_PM */