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_is_monitor_mode - Determine if interface in monitor mode
 832  *
 833  * priv->iw_mode is set in add_interface, but add_interface is
 834  * never called for monitor mode. The only way mac80211 informs us about
 835  * monitor mode is through configuring filters (call to configure_filter).
 836  */
 837 static bool iwl_is_monitor_mode(struct iwl_priv *priv)
 838 {
 839         return !!(priv->staging_rxon.filter_flags & RXON_FILTER_PROMISC_MSK);
 840 }
 841
 842 /**
 843  * iwl_set_rxon_chain - Set up Rx chain usage in "staging" RXON image
 844  *
 845  * Selects how many and which Rx receivers/antennas/chains to use.
 846  * This should not be used for scan command ... it puts data in wrong place.
 847  */
 848 void iwl_set_rxon_chain(struct iwl_priv *priv)
 849 {
 850         bool is_single = is_single_rx_stream(priv);
 851         bool is_cam = !test_bit(STATUS_POWER_PMI, &priv->status);
 852         u8 idle_rx_cnt, active_rx_cnt, valid_rx_cnt;
 853         u32 active_chains;
 854         u16 rx_chain;
 855
 856         /* Tell uCode which antennas are actually connected.
 857          * Before first association, we assume all antennas are connected.
 858          * Just after first association, iwl_chain_noise_calibration()
 859          *    checks which antennas actually *are* connected. */
 860          if (priv->chain_noise_data.active_chains)
 861                 active_chains = priv->chain_noise_data.active_chains;
 862         else
 863                 active_chains = priv->hw_params.valid_rx_ant;
 864
 865         rx_chain = active_chains << RXON_RX_CHAIN_VALID_POS;
 866
 867         /* How many receivers should we use? */
 868         active_rx_cnt = iwl_get_active_rx_chain_count(priv);
 869         idle_rx_cnt = iwl_get_idle_rx_chain_count(priv, active_rx_cnt);
 870
 871
 872         /* correct rx chain count according hw settings
 873          * and chain noise calibration
 874          */
 875         valid_rx_cnt = iwl_count_chain_bitmap(active_chains);
 876         if (valid_rx_cnt < active_rx_cnt)
 877                 active_rx_cnt = valid_rx_cnt;
 878
 879         if (valid_rx_cnt < idle_rx_cnt)
 880                 idle_rx_cnt = valid_rx_cnt;
 881
 882         rx_chain |= active_rx_cnt << RXON_RX_CHAIN_MIMO_CNT_POS;
 883         rx_chain |= idle_rx_cnt  << RXON_RX_CHAIN_CNT_POS;
 884
 885         /* copied from 'iwl_bg_request_scan()' */
 886         /* Force use of chains B and C (0x6) for Rx
 887          * Avoid A (0x1) for the device has off-channel reception on A-band.
 888          * MIMO is not used here, but value is required */
 889         if (iwl_is_monitor_mode(priv) &&
 890             !(priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) &&
 891             priv->cfg->off_channel_workaround) {
 892                 rx_chain = ANT_ABC << RXON_RX_CHAIN_VALID_POS;
 893                 rx_chain |= ANT_BC << RXON_RX_CHAIN_FORCE_SEL_POS;
 894                 rx_chain |= ANT_ABC << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS;
 895                 rx_chain |= 0x1 << RXON_RX_CHAIN_DRIVER_FORCE_POS;
 896         }
 897
 898         priv->staging_rxon.rx_chain = cpu_to_le16(rx_chain);
 899
 900         if (!is_single && (active_rx_cnt >= IWL_NUM_RX_CHAINS_SINGLE) && is_cam)
 901                 priv->staging_rxon.rx_chain |= RXON_RX_CHAIN_MIMO_FORCE_MSK;
 902         else
 903                 priv->staging_rxon.rx_chain &= ~RXON_RX_CHAIN_MIMO_FORCE_MSK;
 904
 905         IWL_DEBUG_ASSOC(priv, "rx_chain=0x%X active=%d idle=%d\n",
 906                         priv->staging_rxon.rx_chain,
 907                         active_rx_cnt, idle_rx_cnt);
 908
 909         WARN_ON(active_rx_cnt == 0 || idle_rx_cnt == 0 ||
 910                 active_rx_cnt < idle_rx_cnt);
 911 }
 912 EXPORT_SYMBOL(iwl_set_rxon_chain);
 913
 914 /**
 915  * iwl_set_rxon_channel - Set the phymode and channel values in staging RXON
 916  * @phymode: MODE_IEEE80211A sets to 5.2GHz; all else set to 2.4GHz
 917  * @channel: Any channel valid for the requested phymode
 918
 919  * In addition to setting the staging RXON, priv->phymode is also set.
 920  *
 921  * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
 922  * in the staging RXON flag structure based on the phymode
 923  */
 924 int iwl_set_rxon_channel(struct iwl_priv *priv, struct ieee80211_channel *ch)
 925 {
 926         enum ieee80211_band band = ch->band;
 927         u16 channel = ieee80211_frequency_to_channel(ch->center_freq);
 928
 929         if (!iwl_get_channel_info(priv, band, channel)) {
 930                 IWL_DEBUG_INFO(priv, "Could not set channel to %d [%d]\n",
 931                                channel, band);
 932                 return -EINVAL;
 933         }
 934
 935         if ((le16_to_cpu(priv->staging_rxon.channel) == channel) &&
 936             (priv->band == band))
 937                 return 0;
 938
 939         priv->staging_rxon.channel = cpu_to_le16(channel);
 940         if (band == IEEE80211_BAND_5GHZ)
 941                 priv->staging_rxon.flags &= ~RXON_FLG_BAND_24G_MSK;
 942         else
 943                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
 944
 945         priv->band = band;
 946
 947         IWL_DEBUG_INFO(priv, "Staging channel set to %d [%d]\n", channel, band);
 948
 949         return 0;
 950 }
 951 EXPORT_SYMBOL(iwl_set_rxon_channel);
 952
 953 void iwl_set_flags_for_band(struct iwl_priv *priv,
 954                             enum ieee80211_band band)
 955 {
 956         if (band == IEEE80211_BAND_5GHZ) {
 957                 priv->staging_rxon.flags &=
 958                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
 959                       | RXON_FLG_CCK_MSK);
 960                 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
 961         } else {
 962                 /* Copied from iwl_post_associate() */
 963                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
 964                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
 965                 else
 966                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
 967
 968                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
 969                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
 970
 971                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
 972                 priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
 973                 priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
 974         }
 975 }
 976
 977 /*
 978  * initialize rxon structure with default values from eeprom
 979  */
 980 void iwl_connection_init_rx_config(struct iwl_priv *priv, int mode)
 981 {
 982         const struct iwl_channel_info *ch_info;
 983
 984         memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
 985
 986         switch (mode) {
 987         case NL80211_IFTYPE_AP:
 988                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
 989                 break;
 990
 991         case NL80211_IFTYPE_STATION:
 992                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
 993                 priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
 994                 break;
 995
 996         case NL80211_IFTYPE_ADHOC:
 997                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
 998                 priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
 999                 priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
1000                                                   RXON_FILTER_ACCEPT_GRP_MSK;
1001                 break;
1002
1003         default:
1004                 IWL_ERR(priv, "Unsupported interface type %d\n", mode);
1005                 break;
1006         }
1007
1008 #if 0
1009         /* TODO:  Figure out when short_preamble would be set and cache from
1010          * that */
1011         if (!hw_to_local(priv->hw)->short_preamble)
1012                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
1013         else
1014                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
1015 #endif
1016
1017         ch_info = iwl_get_channel_info(priv, priv->band,
1018                                        le16_to_cpu(priv->active_rxon.channel));
1019
1020         if (!ch_info)
1021                 ch_info = &priv->channel_info[0];
1022
1023         priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
1024         priv->band = ch_info->band;
1025
1026         iwl_set_flags_for_band(priv, priv->band);
1027
1028         priv->staging_rxon.ofdm_basic_rates =
1029             (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
1030         priv->staging_rxon.cck_basic_rates =
1031             (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
1032
1033         /* clear both MIX and PURE40 mode flag */
1034         priv->staging_rxon.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED |
1035                                         RXON_FLG_CHANNEL_MODE_PURE_40);
1036         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
1037         memcpy(priv->staging_rxon.wlap_bssid_addr, priv->mac_addr, ETH_ALEN);
1038         priv->staging_rxon.ofdm_ht_single_stream_basic_rates = 0xff;
1039         priv->staging_rxon.ofdm_ht_dual_stream_basic_rates = 0xff;
1040         priv->staging_rxon.ofdm_ht_triple_stream_basic_rates = 0xff;
1041 }
1042 EXPORT_SYMBOL(iwl_connection_init_rx_config);
1043
1044 static void iwl_set_rate(struct iwl_priv *priv)
1045 {
1046         const struct ieee80211_supported_band *hw = NULL;
1047         struct ieee80211_rate *rate;
1048         int i;
1049
1050         hw = iwl_get_hw_mode(priv, priv->band);
1051         if (!hw) {
1052                 IWL_ERR(priv, "Failed to set rate: unable to get hw mode\n");
1053                 return;
1054         }
1055
1056         priv->active_rate = 0;
1057
1058         for (i = 0; i < hw->n_bitrates; i++) {
1059                 rate = &(hw->bitrates[i]);
1060                 if (rate->hw_value < IWL_RATE_COUNT_LEGACY)
1061                         priv->active_rate |= (1 << rate->hw_value);
1062         }
1063
1064         IWL_DEBUG_RATE(priv, "Set active_rate = %0x\n", priv->active_rate);
1065
1066         priv->staging_rxon.cck_basic_rates =
1067             (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
1068
1069         priv->staging_rxon.ofdm_basic_rates =
1070            (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
1071 }
1072
1073 void iwl_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
1074 {
1075         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1076         struct iwl_rxon_cmd *rxon = (void *)&priv->active_rxon;
1077         struct iwl_csa_notification *csa = &(pkt->u.csa_notif);
1078
1079         if (priv->switch_rxon.switch_in_progress) {
1080                 if (!le32_to_cpu(csa->status) &&
1081                     (csa->channel == priv->switch_rxon.channel)) {
1082                         rxon->channel = csa->channel;
1083                         priv->staging_rxon.channel = csa->channel;
1084                         IWL_DEBUG_11H(priv, "CSA notif: channel %d\n",
1085                               le16_to_cpu(csa->channel));
1086                 } else
1087                         IWL_ERR(priv, "CSA notif (fail) : channel %d\n",
1088                               le16_to_cpu(csa->channel));
1089
1090                 priv->switch_rxon.switch_in_progress = false;
1091         }
1092 }
1093 EXPORT_SYMBOL(iwl_rx_csa);
1094
1095 #ifdef CONFIG_IWLWIFI_DEBUG
1096 void iwl_print_rx_config_cmd(struct iwl_priv *priv)
1097 {
1098         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
1099
1100         IWL_DEBUG_RADIO(priv, "RX CONFIG:\n");
1101         iwl_print_hex_dump(priv, IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
1102         IWL_DEBUG_RADIO(priv, "u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
1103         IWL_DEBUG_RADIO(priv, "u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
1104         IWL_DEBUG_RADIO(priv, "u32 filter_flags: 0x%08x\n",
1105                         le32_to_cpu(rxon->filter_flags));
1106         IWL_DEBUG_RADIO(priv, "u8 dev_type: 0x%x\n", rxon->dev_type);
1107         IWL_DEBUG_RADIO(priv, "u8 ofdm_basic_rates: 0x%02x\n",
1108                         rxon->ofdm_basic_rates);
1109         IWL_DEBUG_RADIO(priv, "u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
1110         IWL_DEBUG_RADIO(priv, "u8[6] node_addr: %pM\n", rxon->node_addr);
1111         IWL_DEBUG_RADIO(priv, "u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
1112         IWL_DEBUG_RADIO(priv, "u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
1113 }
1114 EXPORT_SYMBOL(iwl_print_rx_config_cmd);
1115 #endif
1116 /**
1117  * iwl_irq_handle_error - called for HW or SW error interrupt from card
1118  */
1119 void iwl_irq_handle_error(struct iwl_priv *priv)
1120 {
1121         /* Set the FW error flag -- cleared on iwl_down */
1122         set_bit(STATUS_FW_ERROR, &priv->status);
1123
1124         /* Cancel currently queued command. */
1125         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
1126
1127         priv->cfg->ops->lib->dump_nic_error_log(priv);
1128         if (priv->cfg->ops->lib->dump_csr)
1129                 priv->cfg->ops->lib->dump_csr(priv);
1130         if (priv->cfg->ops->lib->dump_fh)
1131                 priv->cfg->ops->lib->dump_fh(priv, NULL, false);
1132         priv->cfg->ops->lib->dump_nic_event_log(priv, false, NULL, false);
1133 #ifdef CONFIG_IWLWIFI_DEBUG
1134         if (iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS)
1135                 iwl_print_rx_config_cmd(priv);
1136 #endif
1137
1138         wake_up_interruptible(&priv->wait_command_queue);
1139
1140         /* Keep the restart process from trying to send host
1141          * commands by clearing the INIT status bit */
1142         clear_bit(STATUS_READY, &priv->status);
1143
1144         if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1145                 IWL_DEBUG(priv, IWL_DL_FW_ERRORS,
1146                           "Restarting adapter due to uCode error.\n");
1147
1148                 if (priv->cfg->mod_params->restart_fw)
1149                         queue_work(priv->workqueue, &priv->restart);
1150         }
1151 }
1152 EXPORT_SYMBOL(iwl_irq_handle_error);
1153
1154 static int iwl_apm_stop_master(struct iwl_priv *priv)
1155 {
1156         int ret = 0;
1157
1158         /* stop device's busmaster DMA activity */
1159         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
1160
1161         ret = iwl_poll_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_MASTER_DISABLED,
1162                         CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
1163         if (ret)
1164                 IWL_WARN(priv, "Master Disable Timed Out, 100 usec\n");
1165
1166         IWL_DEBUG_INFO(priv, "stop master\n");
1167
1168         return ret;
1169 }
1170
1171 void iwl_apm_stop(struct iwl_priv *priv)
1172 {
1173         IWL_DEBUG_INFO(priv, "Stop card, put in low power state\n");
1174
1175         /* Stop device's DMA activity */
1176         iwl_apm_stop_master(priv);
1177
1178         /* Reset the entire device */
1179         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
1180
1181         udelay(10);
1182
1183         /*
1184          * Clear "initialization complete" bit to move adapter from
1185          * D0A* (powered-up Active) --> D0U* (Uninitialized) state.
1186          */
1187         iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1188 }
1189 EXPORT_SYMBOL(iwl_apm_stop);
1190
1191
1192 /*
1193  * Start up NIC's basic functionality after it has been reset
1194  * (e.g. after platform boot, or shutdown via iwl_apm_stop())
1195  * NOTE:  This does not load uCode nor start the embedded processor
1196  */
1197 int iwl_apm_init(struct iwl_priv *priv)
1198 {
1199         int ret = 0;
1200         u16 lctl;
1201
1202         IWL_DEBUG_INFO(priv, "Init card's basic functions\n");
1203
1204         /*
1205          * Use "set_bit" below rather than "write", to preserve any hardware
1206          * bits already set by default after reset.
1207          */
1208
1209         /* Disable L0S exit timer (platform NMI Work/Around) */
1210         iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
1211                           CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
1212
1213         /*
1214          * Disable L0s without affecting L1;
1215          *  don't wait for ICH L0s (ICH bug W/A)
1216          */
1217         iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
1218                           CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
1219
1220         /* Set FH wait threshold to maximum (HW error during stress W/A) */
1221         iwl_set_bit(priv, CSR_DBG_HPET_MEM_REG, CSR_DBG_HPET_MEM_REG_VAL);
1222
1223         /*
1224          * Enable HAP INTA (interrupt from management bus) to
1225          * wake device's PCI Express link L1a -> L0s
1226          * NOTE:  This is no-op for 3945 (non-existant bit)
1227          */
1228         iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1229                                     CSR_HW_IF_CONFIG_REG_BIT_HAP_WAKE_L1A);
1230
1231         /*
1232          * HW bug W/A for instability in PCIe bus L0->L0S->L1 transition.
1233          * Check if BIOS (or OS) enabled L1-ASPM on this device.
1234          * If so (likely), disable L0S, so device moves directly L0->L1;
1235          *    costs negligible amount of power savings.
1236          * If not (unlikely), enable L0S, so there is at least some
1237          *    power savings, even without L1.
1238          */
1239         if (priv->cfg->set_l0s) {
1240                 lctl = iwl_pcie_link_ctl(priv);
1241                 if ((lctl & PCI_CFG_LINK_CTRL_VAL_L1_EN) ==
1242                                         PCI_CFG_LINK_CTRL_VAL_L1_EN) {
1243                         /* L1-ASPM enabled; disable(!) L0S  */
1244                         iwl_set_bit(priv, CSR_GIO_REG,
1245                                         CSR_GIO_REG_VAL_L0S_ENABLED);
1246                         IWL_DEBUG_POWER(priv, "L1 Enabled; Disabling L0S\n");
1247                 } else {
1248                         /* L1-ASPM disabled; enable(!) L0S */
1249                         iwl_clear_bit(priv, CSR_GIO_REG,
1250                                         CSR_GIO_REG_VAL_L0S_ENABLED);
1251                         IWL_DEBUG_POWER(priv, "L1 Disabled; Enabling L0S\n");
1252                 }
1253         }
1254
1255         /* Configure analog phase-lock-loop before activating to D0A */
1256         if (priv->cfg->pll_cfg_val)
1257                 iwl_set_bit(priv, CSR_ANA_PLL_CFG, priv->cfg->pll_cfg_val);
1258
1259         /*
1260          * Set "initialization complete" bit to move adapter from
1261          * D0U* --> D0A* (powered-up active) state.
1262          */
1263         iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1264
1265         /*
1266          * Wait for clock stabilization; once stabilized, access to
1267          * device-internal resources is supported, e.g. iwl_write_prph()
1268          * and accesses to uCode SRAM.
1269          */
1270         ret = iwl_poll_bit(priv, CSR_GP_CNTRL,
1271                         CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
1272                         CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
1273         if (ret < 0) {
1274                 IWL_DEBUG_INFO(priv, "Failed to init the card\n");
1275                 goto out;
1276         }
1277
1278         /*
1279          * Enable DMA and BSM (if used) clocks, wait for them to stabilize.
1280          * BSM (Boostrap State Machine) is only in 3945 and 4965;
1281          * later devices (i.e. 5000 and later) have non-volatile SRAM,
1282          * and don't need BSM to restore data after power-saving sleep.
1283          *
1284          * Write to "CLK_EN_REG"; "1" bits enable clocks, while "0" bits
1285          * do not disable clocks.  This preserves any hardware bits already
1286          * set by default in "CLK_CTRL_REG" after reset.
1287          */
1288         if (priv->cfg->use_bsm)
1289                 iwl_write_prph(priv, APMG_CLK_EN_REG,
1290                         APMG_CLK_VAL_DMA_CLK_RQT | APMG_CLK_VAL_BSM_CLK_RQT);
1291         else
1292                 iwl_write_prph(priv, APMG_CLK_EN_REG,
1293                         APMG_CLK_VAL_DMA_CLK_RQT);
1294         udelay(20);
1295
1296         /* Disable L1-Active */
1297         iwl_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
1298                           APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
1299
1300 out:
1301         return ret;
1302 }
1303 EXPORT_SYMBOL(iwl_apm_init);
1304
1305
1306
1307 void iwl_configure_filter(struct ieee80211_hw *hw,
1308                           unsigned int changed_flags,
1309                           unsigned int *total_flags,
1310                           u64 multicast)
1311 {
1312         struct iwl_priv *priv = hw->priv;
1313         __le32 *filter_flags = &priv->staging_rxon.filter_flags;
1314
1315         IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
1316                         changed_flags, *total_flags);
1317
1318         if (changed_flags & (FIF_OTHER_BSS | FIF_PROMISC_IN_BSS)) {
1319                 if (*total_flags & (FIF_OTHER_BSS | FIF_PROMISC_IN_BSS))
1320                         *filter_flags |= RXON_FILTER_PROMISC_MSK;
1321                 else
1322                         *filter_flags &= ~RXON_FILTER_PROMISC_MSK;
1323         }
1324         if (changed_flags & FIF_ALLMULTI) {
1325                 if (*total_flags & FIF_ALLMULTI)
1326                         *filter_flags |= RXON_FILTER_ACCEPT_GRP_MSK;
1327                 else
1328                         *filter_flags &= ~RXON_FILTER_ACCEPT_GRP_MSK;
1329         }
1330         if (changed_flags & FIF_CONTROL) {
1331                 if (*total_flags & FIF_CONTROL)
1332                         *filter_flags |= RXON_FILTER_CTL2HOST_MSK;
1333                 else
1334                         *filter_flags &= ~RXON_FILTER_CTL2HOST_MSK;
1335         }
1336         if (changed_flags & FIF_BCN_PRBRESP_PROMISC) {
1337                 if (*total_flags & FIF_BCN_PRBRESP_PROMISC)
1338                         *filter_flags |= RXON_FILTER_BCON_AWARE_MSK;
1339                 else
1340                         *filter_flags &= ~RXON_FILTER_BCON_AWARE_MSK;
1341         }
1342
1343         /* We avoid iwl_commit_rxon here to commit the new filter flags
1344          * since mac80211 will call ieee80211_hw_config immediately.
1345          * (mc_list is not supported at this time). Otherwise, we need to
1346          * queue a background iwl_commit_rxon work.
1347          */
1348
1349         *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
1350                         FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
1351 }
1352 EXPORT_SYMBOL(iwl_configure_filter);
1353
1354 int iwl_set_hw_params(struct iwl_priv *priv)
1355 {
1356         priv->hw_params.max_rxq_size = RX_QUEUE_SIZE;
1357         priv->hw_params.max_rxq_log = RX_QUEUE_SIZE_LOG;
1358         if (priv->cfg->mod_params->amsdu_size_8K)
1359                 priv->hw_params.rx_page_order = get_order(IWL_RX_BUF_SIZE_8K);
1360         else
1361                 priv->hw_params.rx_page_order = get_order(IWL_RX_BUF_SIZE_4K);
1362
1363         priv->hw_params.max_beacon_itrvl = IWL_MAX_UCODE_BEACON_INTERVAL;
1364
1365         if (priv->cfg->mod_params->disable_11n)
1366                 priv->cfg->sku &= ~IWL_SKU_N;
1367
1368         /* Device-specific setup */
1369         return priv->cfg->ops->lib->set_hw_params(priv);
1370 }
1371 EXPORT_SYMBOL(iwl_set_hw_params);
1372
1373 int iwl_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force)
1374 {
1375         int ret = 0;
1376         s8 prev_tx_power = priv->tx_power_user_lmt;
1377
1378         if (tx_power < IWLAGN_TX_POWER_TARGET_POWER_MIN) {
1379                 IWL_WARN(priv,
1380                          "Requested user TXPOWER %d below lower limit %d.\n",
1381                          tx_power,
1382                          IWLAGN_TX_POWER_TARGET_POWER_MIN);
1383                 return -EINVAL;
1384         }
1385
1386         if (tx_power > priv->tx_power_device_lmt) {
1387                 IWL_WARN(priv,
1388                         "Requested user TXPOWER %d above upper limit %d.\n",
1389                          tx_power, priv->tx_power_device_lmt);
1390                 return -EINVAL;
1391         }
1392
1393         if (priv->tx_power_user_lmt != tx_power)
1394                 force = true;
1395
1396         /* if nic is not up don't send command */
1397         if (iwl_is_ready_rf(priv)) {
1398                 priv->tx_power_user_lmt = tx_power;
1399                 if (force && priv->cfg->ops->lib->send_tx_power)
1400                         ret = priv->cfg->ops->lib->send_tx_power(priv);
1401                 else if (!priv->cfg->ops->lib->send_tx_power)
1402                         ret = -EOPNOTSUPP;
1403                 /*
1404                  * if fail to set tx_power, restore the orig. tx power
1405                  */
1406                 if (ret)
1407                         priv->tx_power_user_lmt = prev_tx_power;
1408         }
1409
1410         /*
1411          * Even this is an async host command, the command
1412          * will always report success from uCode
1413          * So once driver can placing the command into the queue
1414          * successfully, driver can use priv->tx_power_user_lmt
1415          * to reflect the current tx power
1416          */
1417         return ret;
1418 }
1419 EXPORT_SYMBOL(iwl_set_tx_power);
1420
1421 irqreturn_t iwl_isr_legacy(int irq, void *data)
1422 {
1423         struct iwl_priv *priv = data;
1424         u32 inta, inta_mask;
1425         u32 inta_fh;
1426         unsigned long flags;
1427         if (!priv)
1428                 return IRQ_NONE;
1429
1430         spin_lock_irqsave(&priv->lock, flags);
1431
1432         /* Disable (but don't clear!) interrupts here to avoid
1433          *    back-to-back ISRs and sporadic interrupts from our NIC.
1434          * If we have something to service, the tasklet will re-enable ints.
1435          * If we *don't* have something, we'll re-enable before leaving here. */
1436         inta_mask = iwl_read32(priv, CSR_INT_MASK);  /* just for debug */
1437         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
1438
1439         /* Discover which interrupts are active/pending */
1440         inta = iwl_read32(priv, CSR_INT);
1441         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1442
1443         /* Ignore interrupt if there's nothing in NIC to service.
1444          * This may be due to IRQ shared with another device,
1445          * or due to sporadic interrupts thrown from our NIC. */
1446         if (!inta && !inta_fh) {
1447                 IWL_DEBUG_ISR(priv, "Ignore interrupt, inta == 0, inta_fh == 0\n");
1448                 goto none;
1449         }
1450
1451         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
1452                 /* Hardware disappeared. It might have already raised
1453                  * an interrupt */
1454                 IWL_WARN(priv, "HARDWARE GONE?? INTA == 0x%08x\n", inta);
1455                 goto unplugged;
1456         }
1457
1458         IWL_DEBUG_ISR(priv, "ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1459                       inta, inta_mask, inta_fh);
1460
1461         inta &= ~CSR_INT_BIT_SCD;
1462
1463         /* iwl_irq_tasklet() will service interrupts and re-enable them */
1464         if (likely(inta || inta_fh))
1465                 tasklet_schedule(&priv->irq_tasklet);
1466
1467  unplugged:
1468         spin_unlock_irqrestore(&priv->lock, flags);
1469         return IRQ_HANDLED;
1470
1471  none:
1472         /* re-enable interrupts here since we don't have anything to service. */
1473         /* only Re-enable if diabled by irq */
1474         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1475                 iwl_enable_interrupts(priv);
1476         spin_unlock_irqrestore(&priv->lock, flags);
1477         return IRQ_NONE;
1478 }
1479 EXPORT_SYMBOL(iwl_isr_legacy);
1480
1481 void iwl_send_bt_config(struct iwl_priv *priv)
1482 {
1483         struct iwl_bt_cmd bt_cmd = {
1484                 .lead_time = BT_LEAD_TIME_DEF,
1485                 .max_kill = BT_MAX_KILL_DEF,
1486                 .kill_ack_mask = 0,
1487                 .kill_cts_mask = 0,
1488         };
1489
1490         if (!bt_coex_active)
1491                 bt_cmd.flags = BT_COEX_DISABLE;
1492         else
1493                 bt_cmd.flags = BT_COEX_ENABLE;
1494
1495         IWL_DEBUG_INFO(priv, "BT coex %s\n",
1496                 (bt_cmd.flags == BT_COEX_DISABLE) ? "disable" : "active");
1497
1498         if (iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG,
1499                              sizeof(struct iwl_bt_cmd), &bt_cmd))
1500                 IWL_ERR(priv, "failed to send BT Coex Config\n");
1501 }
1502 EXPORT_SYMBOL(iwl_send_bt_config);
1503
1504 int iwl_send_statistics_request(struct iwl_priv *priv, u8 flags, bool clear)
1505 {
1506         struct iwl_statistics_cmd statistics_cmd = {
1507                 .configuration_flags =
1508                         clear ? IWL_STATS_CONF_CLEAR_STATS : 0,
1509         };
1510
1511         if (flags & CMD_ASYNC)
1512                 return iwl_send_cmd_pdu_async(priv, REPLY_STATISTICS_CMD,
1513                                                sizeof(struct iwl_statistics_cmd),
1514                                                &statistics_cmd, NULL);
1515         else
1516                 return iwl_send_cmd_pdu(priv, REPLY_STATISTICS_CMD,
1517                                         sizeof(struct iwl_statistics_cmd),
1518                                         &statistics_cmd);
1519 }
1520 EXPORT_SYMBOL(iwl_send_statistics_request);
1521
1522 /**
1523  * iwl_verify_inst_sparse - verify runtime uCode image in card vs. host,
1524  *   using sample data 100 bytes apart.  If these sample points are good,
1525  *   it's a pretty good bet that everything between them is good, too.
1526  */
1527 static int iwlcore_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
1528 {
1529         u32 val;
1530         int ret = 0;
1531         u32 errcnt = 0;
1532         u32 i;
1533
1534         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
1535
1536         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
1537                 /* read data comes through single port, auto-incr addr */
1538                 /* NOTE: Use the debugless read so we don't flood kernel log
1539                  * if IWL_DL_IO is set */
1540                 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
1541                         i + IWL49_RTC_INST_LOWER_BOUND);
1542                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1543                 if (val != le32_to_cpu(*image)) {
1544                         ret = -EIO;
1545                         errcnt++;
1546                         if (errcnt >= 3)
1547                                 break;
1548                 }
1549         }
1550
1551         return ret;
1552 }
1553
1554 /**
1555  * iwlcore_verify_inst_full - verify runtime uCode image in card vs. host,
1556  *     looking at all data.
1557  */
1558 static int iwl_verify_inst_full(struct iwl_priv *priv, __le32 *image,
1559                                  u32 len)
1560 {
1561         u32 val;
1562         u32 save_len = len;
1563         int ret = 0;
1564         u32 errcnt;
1565
1566         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
1567
1568         iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
1569                            IWL49_RTC_INST_LOWER_BOUND);
1570
1571         errcnt = 0;
1572         for (; len > 0; len -= sizeof(u32), image++) {
1573                 /* read data comes through single port, auto-incr addr */
1574                 /* NOTE: Use the debugless read so we don't flood kernel log
1575                  * if IWL_DL_IO is set */
1576                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1577                 if (val != le32_to_cpu(*image)) {
1578                         IWL_ERR(priv, "uCode INST section is invalid at "
1579                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
1580                                   save_len - len, val, le32_to_cpu(*image));
1581                         ret = -EIO;
1582                         errcnt++;
1583                         if (errcnt >= 20)
1584                                 break;
1585                 }
1586         }
1587
1588         if (!errcnt)
1589                 IWL_DEBUG_INFO(priv,
1590                     "ucode image in INSTRUCTION memory is good\n");
1591
1592         return ret;
1593 }
1594
1595 /**
1596  * iwl_verify_ucode - determine which instruction image is in SRAM,
1597  *    and verify its contents
1598  */
1599 int iwl_verify_ucode(struct iwl_priv *priv)
1600 {
1601         __le32 *image;
1602         u32 len;
1603         int ret;
1604
1605         /* Try bootstrap */
1606         image = (__le32 *)priv->ucode_boot.v_addr;
1607         len = priv->ucode_boot.len;
1608         ret = iwlcore_verify_inst_sparse(priv, image, len);
1609         if (!ret) {
1610                 IWL_DEBUG_INFO(priv, "Bootstrap uCode is good in inst SRAM\n");
1611                 return 0;
1612         }
1613
1614         /* Try initialize */
1615         image = (__le32 *)priv->ucode_init.v_addr;
1616         len = priv->ucode_init.len;
1617         ret = iwlcore_verify_inst_sparse(priv, image, len);
1618         if (!ret) {
1619                 IWL_DEBUG_INFO(priv, "Initialize uCode is good in inst SRAM\n");
1620                 return 0;
1621         }
1622
1623         /* Try runtime/protocol */
1624         image = (__le32 *)priv->ucode_code.v_addr;
1625         len = priv->ucode_code.len;
1626         ret = iwlcore_verify_inst_sparse(priv, image, len);
1627         if (!ret) {
1628                 IWL_DEBUG_INFO(priv, "Runtime uCode is good in inst SRAM\n");
1629                 return 0;
1630         }
1631
1632         IWL_ERR(priv, "NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
1633
1634         /* Since nothing seems to match, show first several data entries in
1635          * instruction SRAM, so maybe visual inspection will give a clue.
1636          * Selection of bootstrap image (vs. other images) is arbitrary. */
1637         image = (__le32 *)priv->ucode_boot.v_addr;
1638         len = priv->ucode_boot.len;
1639         ret = iwl_verify_inst_full(priv, image, len);
1640
1641         return ret;
1642 }
1643 EXPORT_SYMBOL(iwl_verify_ucode);
1644
1645
1646 void iwl_rf_kill_ct_config(struct iwl_priv *priv)
1647 {
1648         struct iwl_ct_kill_config cmd;
1649         struct iwl_ct_kill_throttling_config adv_cmd;
1650         unsigned long flags;
1651         int ret = 0;
1652
1653         spin_lock_irqsave(&priv->lock, flags);
1654         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
1655                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
1656         spin_unlock_irqrestore(&priv->lock, flags);
1657         priv->thermal_throttle.ct_kill_toggle = false;
1658
1659         if (priv->cfg->support_ct_kill_exit) {
1660                 adv_cmd.critical_temperature_enter =
1661                         cpu_to_le32(priv->hw_params.ct_kill_threshold);
1662                 adv_cmd.critical_temperature_exit =
1663                         cpu_to_le32(priv->hw_params.ct_kill_exit_threshold);
1664
1665                 ret = iwl_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD,
1666                                        sizeof(adv_cmd), &adv_cmd);
1667                 if (ret)
1668                         IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
1669                 else
1670                         IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
1671                                         "succeeded, "
1672                                         "critical temperature enter is %d,"
1673                                         "exit is %d\n",
1674                                        priv->hw_params.ct_kill_threshold,
1675                                        priv->hw_params.ct_kill_exit_threshold);
1676         } else {
1677                 cmd.critical_temperature_R =
1678                         cpu_to_le32(priv->hw_params.ct_kill_threshold);
1679
1680                 ret = iwl_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD,
1681                                        sizeof(cmd), &cmd);
1682                 if (ret)
1683                         IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
1684                 else
1685                         IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
1686                                         "succeeded, "
1687                                         "critical temperature is %d\n",
1688                                         priv->hw_params.ct_kill_threshold);
1689         }
1690 }
1691 EXPORT_SYMBOL(iwl_rf_kill_ct_config);
1692
1693
1694 /*
1695  * CARD_STATE_CMD
1696  *
1697  * Use: Sets the device's internal card state to enable, disable, or halt
1698  *
1699  * When in the 'enable' state the card operates as normal.
1700  * When in the 'disable' state, the card enters into a low power mode.
1701  * When in the 'halt' state, the card is shut down and must be fully
1702  * restarted to come back on.
1703  */
1704 int iwl_send_card_state(struct iwl_priv *priv, u32 flags, u8 meta_flag)
1705 {
1706         struct iwl_host_cmd cmd = {
1707                 .id = REPLY_CARD_STATE_CMD,
1708                 .len = sizeof(u32),
1709                 .data = &flags,
1710                 .flags = meta_flag,
1711         };
1712
1713         return iwl_send_cmd(priv, &cmd);
1714 }
1715
1716 void iwl_rx_pm_sleep_notif(struct iwl_priv *priv,
1717                            struct iwl_rx_mem_buffer *rxb)
1718 {
1719 #ifdef CONFIG_IWLWIFI_DEBUG
1720         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1721         struct iwl_sleep_notification *sleep = &(pkt->u.sleep_notif);
1722         IWL_DEBUG_RX(priv, "sleep mode: %d, src: %d\n",
1723                      sleep->pm_sleep_mode, sleep->pm_wakeup_src);
1724 #endif
1725 }
1726 EXPORT_SYMBOL(iwl_rx_pm_sleep_notif);
1727
1728 void iwl_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
1729                                       struct iwl_rx_mem_buffer *rxb)
1730 {
1731         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1732         u32 len = le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
1733         IWL_DEBUG_RADIO(priv, "Dumping %d bytes of unhandled "
1734                         "notification for %s:\n", len,
1735                         get_cmd_string(pkt->hdr.cmd));
1736         iwl_print_hex_dump(priv, IWL_DL_RADIO, pkt->u.raw, len);
1737 }
1738 EXPORT_SYMBOL(iwl_rx_pm_debug_statistics_notif);
1739
1740 void iwl_rx_reply_error(struct iwl_priv *priv,
1741                         struct iwl_rx_mem_buffer *rxb)
1742 {
1743         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1744
1745         IWL_ERR(priv, "Error Reply type 0x%08X cmd %s (0x%02X) "
1746                 "seq 0x%04X ser 0x%08X\n",
1747                 le32_to_cpu(pkt->u.err_resp.error_type),
1748                 get_cmd_string(pkt->u.err_resp.cmd_id),
1749                 pkt->u.err_resp.cmd_id,
1750                 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
1751                 le32_to_cpu(pkt->u.err_resp.error_info));
1752 }
1753 EXPORT_SYMBOL(iwl_rx_reply_error);
1754
1755 void iwl_clear_isr_stats(struct iwl_priv *priv)
1756 {
1757         memset(&priv->isr_stats, 0, sizeof(priv->isr_stats));
1758 }
1759
1760 int iwl_mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
1761                            const struct ieee80211_tx_queue_params *params)
1762 {
1763         struct iwl_priv *priv = hw->priv;
1764         unsigned long flags;
1765         int q;
1766
1767         IWL_DEBUG_MAC80211(priv, "enter\n");
1768
1769         if (!iwl_is_ready_rf(priv)) {
1770                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1771                 return -EIO;
1772         }
1773
1774         if (queue >= AC_NUM) {
1775                 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1776                 return 0;
1777         }
1778
1779         q = AC_NUM - 1 - queue;
1780
1781         spin_lock_irqsave(&priv->lock, flags);
1782
1783         priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
1784         priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
1785         priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1786         priv->qos_data.def_qos_parm.ac[q].edca_txop =
1787                         cpu_to_le16((params->txop * 32));
1788
1789         priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1790
1791         spin_unlock_irqrestore(&priv->lock, flags);
1792
1793         IWL_DEBUG_MAC80211(priv, "leave\n");
1794         return 0;
1795 }
1796 EXPORT_SYMBOL(iwl_mac_conf_tx);
1797
1798 static void iwl_ht_conf(struct iwl_priv *priv,
1799                         struct ieee80211_bss_conf *bss_conf)
1800 {
1801         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
1802         struct ieee80211_sta *sta;
1803
1804         IWL_DEBUG_MAC80211(priv, "enter:\n");
1805
1806         if (!ht_conf->is_ht)
1807                 return;
1808
1809         ht_conf->ht_protection =
1810                 bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_PROTECTION;
1811         ht_conf->non_GF_STA_present =
1812                 !!(bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
1813
1814         ht_conf->single_chain_sufficient = false;
1815
1816         switch (priv->iw_mode) {
1817         case NL80211_IFTYPE_STATION:
1818                 rcu_read_lock();
1819                 sta = ieee80211_find_sta(priv->vif, priv->bssid);
1820                 if (sta) {
1821                         struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
1822                         int maxstreams;
1823
1824                         maxstreams = (ht_cap->mcs.tx_params &
1825                                       IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK)
1826                                         >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
1827                         maxstreams += 1;
1828
1829                         if ((ht_cap->mcs.rx_mask[1] == 0) &&
1830                             (ht_cap->mcs.rx_mask[2] == 0))
1831                                 ht_conf->single_chain_sufficient = true;
1832                         if (maxstreams <= 1)
1833                                 ht_conf->single_chain_sufficient = true;
1834                 } else {
1835                         /*
1836                          * If at all, this can only happen through a race
1837                          * when the AP disconnects us while we're still
1838                          * setting up the connection, in that case mac80211
1839                          * will soon tell us about that.
1840                          */
1841                         ht_conf->single_chain_sufficient = true;
1842                 }
1843                 rcu_read_unlock();
1844                 break;
1845         case NL80211_IFTYPE_ADHOC:
1846                 ht_conf->single_chain_sufficient = true;
1847                 break;
1848         default:
1849                 break;
1850         }
1851
1852         IWL_DEBUG_MAC80211(priv, "leave\n");
1853 }
1854
1855 static inline void iwl_set_no_assoc(struct iwl_priv *priv)
1856 {
1857         priv->assoc_id = 0;
1858         iwl_led_disassociate(priv);
1859         /*
1860          * inform the ucode that there is no longer an
1861          * association and that no more packets should be
1862          * sent
1863          */
1864         priv->staging_rxon.filter_flags &=
1865                 ~RXON_FILTER_ASSOC_MSK;
1866         priv->staging_rxon.assoc_id = 0;
1867         iwlcore_commit_rxon(priv);
1868 }
1869
1870 void iwl_bss_info_changed(struct ieee80211_hw *hw,
1871                           struct ieee80211_vif *vif,
1872                           struct ieee80211_bss_conf *bss_conf,
1873                           u32 changes)
1874 {
1875         struct iwl_priv *priv = hw->priv;
1876         int ret;
1877
1878         IWL_DEBUG_MAC80211(priv, "changes = 0x%X\n", changes);
1879
1880         if (!iwl_is_alive(priv))
1881                 return;
1882
1883         mutex_lock(&priv->mutex);
1884
1885         if (changes & BSS_CHANGED_BEACON &&
1886             priv->iw_mode == NL80211_IFTYPE_AP) {
1887                 dev_kfree_skb(priv->ibss_beacon);
1888                 priv->ibss_beacon = ieee80211_beacon_get(hw, vif);
1889         }
1890
1891         if (changes & BSS_CHANGED_BEACON_INT) {
1892                 priv->beacon_int = bss_conf->beacon_int;
1893                 /* TODO: in AP mode, do something to make this take effect */
1894         }
1895
1896         if (changes & BSS_CHANGED_BSSID) {
1897                 IWL_DEBUG_MAC80211(priv, "BSSID %pM\n", bss_conf->bssid);
1898
1899                 /*
1900                  * If there is currently a HW scan going on in the
1901                  * background then we need to cancel it else the RXON
1902                  * below/in post_associate will fail.
1903                  */
1904                 if (iwl_scan_cancel_timeout(priv, 100)) {
1905                         IWL_WARN(priv, "Aborted scan still in progress after 100ms\n");
1906                         IWL_DEBUG_MAC80211(priv, "leaving - scan abort failed.\n");
1907                         mutex_unlock(&priv->mutex);
1908                         return;
1909                 }
1910
1911                 /* mac80211 only sets assoc when in STATION mode */
1912                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC ||
1913                     bss_conf->assoc) {
1914                         memcpy(priv->staging_rxon.bssid_addr,
1915                                bss_conf->bssid, ETH_ALEN);
1916
1917                         /* currently needed in a few places */
1918                         memcpy(priv->bssid, bss_conf->bssid, ETH_ALEN);
1919                 } else {
1920                         priv->staging_rxon.filter_flags &=
1921                                 ~RXON_FILTER_ASSOC_MSK;
1922                 }
1923
1924         }
1925
1926         /*
1927          * This needs to be after setting the BSSID in case
1928          * mac80211 decides to do both changes at once because
1929          * it will invoke post_associate.
1930          */
1931         if (priv->iw_mode == NL80211_IFTYPE_ADHOC &&
1932             changes & BSS_CHANGED_BEACON) {
1933                 struct sk_buff *beacon = ieee80211_beacon_get(hw, vif);
1934
1935                 if (beacon)
1936                         iwl_mac_beacon_update(hw, beacon);
1937         }
1938
1939         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
1940                 IWL_DEBUG_MAC80211(priv, "ERP_PREAMBLE %d\n",
1941                                    bss_conf->use_short_preamble);
1942                 if (bss_conf->use_short_preamble)
1943                         priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
1944                 else
1945                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
1946         }
1947
1948         if (changes & BSS_CHANGED_ERP_CTS_PROT) {
1949                 IWL_DEBUG_MAC80211(priv, "ERP_CTS %d\n", bss_conf->use_cts_prot);
1950                 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
1951                         priv->staging_rxon.flags |= RXON_FLG_TGG_PROTECT_MSK;
1952                 else
1953                         priv->staging_rxon.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
1954         }
1955
1956         if (changes & BSS_CHANGED_BASIC_RATES) {
1957                 /* XXX use this information
1958                  *
1959                  * To do that, remove code from iwl_set_rate() and put something
1960                  * like this here:
1961                  *
1962                 if (A-band)
1963                         priv->staging_rxon.ofdm_basic_rates =
1964                                 bss_conf->basic_rates;
1965                 else
1966                         priv->staging_rxon.ofdm_basic_rates =
1967                                 bss_conf->basic_rates >> 4;
1968                         priv->staging_rxon.cck_basic_rates =
1969                                 bss_conf->basic_rates & 0xF;
1970                  */
1971         }
1972
1973         if (changes & BSS_CHANGED_HT) {
1974                 iwl_ht_conf(priv, bss_conf);
1975
1976                 if (priv->cfg->ops->hcmd->set_rxon_chain)
1977                         priv->cfg->ops->hcmd->set_rxon_chain(priv);
1978         }
1979
1980         if (changes & BSS_CHANGED_ASSOC) {
1981                 IWL_DEBUG_MAC80211(priv, "ASSOC %d\n", bss_conf->assoc);
1982                 if (bss_conf->assoc) {
1983                         priv->assoc_id = bss_conf->aid;
1984                         priv->beacon_int = bss_conf->beacon_int;
1985                         priv->timestamp = bss_conf->timestamp;
1986                         priv->assoc_capability = bss_conf->assoc_capability;
1987
1988                         iwl_led_associate(priv);
1989
1990                         if (!iwl_is_rfkill(priv))
1991                                 priv->cfg->ops->lib->post_associate(priv);
1992                 } else
1993                         iwl_set_no_assoc(priv);
1994         }
1995
1996         if (changes && iwl_is_associated(priv) && priv->assoc_id) {
1997                 IWL_DEBUG_MAC80211(priv, "Changes (%#x) while associated\n",
1998                                    changes);
1999                 ret = iwl_send_rxon_assoc(priv);
2000                 if (!ret) {
2001                         /* Sync active_rxon with latest change. */
2002                         memcpy((void *)&priv->active_rxon,
2003                                 &priv->staging_rxon,
2004                                 sizeof(struct iwl_rxon_cmd));
2005                 }
2006         }
2007
2008         if (changes & BSS_CHANGED_BEACON_ENABLED) {
2009                 if (vif->bss_conf.enable_beacon) {
2010                         memcpy(priv->staging_rxon.bssid_addr,
2011                                bss_conf->bssid, ETH_ALEN);
2012                         memcpy(priv->bssid, bss_conf->bssid, ETH_ALEN);
2013                         iwlcore_config_ap(priv);
2014                 } else
2015                         iwl_set_no_assoc(priv);
2016         }
2017
2018         mutex_unlock(&priv->mutex);
2019
2020         IWL_DEBUG_MAC80211(priv, "leave\n");
2021 }
2022 EXPORT_SYMBOL(iwl_bss_info_changed);
2023
2024 int iwl_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb)
2025 {
2026         struct iwl_priv *priv = hw->priv;
2027         unsigned long flags;
2028         __le64 timestamp;
2029
2030         IWL_DEBUG_MAC80211(priv, "enter\n");
2031
2032         if (!iwl_is_ready_rf(priv)) {
2033                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
2034                 return -EIO;
2035         }
2036
2037         spin_lock_irqsave(&priv->lock, flags);
2038
2039         if (priv->ibss_beacon)
2040                 dev_kfree_skb(priv->ibss_beacon);
2041
2042         priv->ibss_beacon = skb;
2043
2044         priv->assoc_id = 0;
2045         timestamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
2046         priv->timestamp = le64_to_cpu(timestamp);
2047
2048         IWL_DEBUG_MAC80211(priv, "leave\n");
2049         spin_unlock_irqrestore(&priv->lock, flags);
2050
2051         priv->cfg->ops->lib->post_associate(priv);
2052
2053         return 0;
2054 }
2055 EXPORT_SYMBOL(iwl_mac_beacon_update);
2056
2057 static int iwl_set_mode(struct iwl_priv *priv, struct ieee80211_vif *vif)
2058 {
2059         iwl_connection_init_rx_config(priv, vif->type);
2060
2061         if (priv->cfg->ops->hcmd->set_rxon_chain)
2062                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
2063
2064         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2065
2066         return iwlcore_commit_rxon(priv);
2067 }
2068
2069 int iwl_mac_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
2070 {
2071         struct iwl_priv *priv = hw->priv;
2072         int err = 0;
2073
2074         IWL_DEBUG_MAC80211(priv, "enter: type %d\n", vif->type);
2075
2076         mutex_lock(&priv->mutex);
2077
2078         if (WARN_ON(!iwl_is_ready_rf(priv))) {
2079                 err = -EINVAL;
2080                 goto out;
2081         }
2082
2083         if (priv->vif) {
2084                 IWL_DEBUG_MAC80211(priv, "leave - vif != NULL\n");
2085                 err = -EOPNOTSUPP;
2086                 goto out;
2087         }
2088
2089         priv->vif = vif;
2090         priv->iw_mode = vif->type;
2091
2092         IWL_DEBUG_MAC80211(priv, "Set %pM\n", vif->addr);
2093         memcpy(priv->mac_addr, vif->addr, ETH_ALEN);
2094
2095         err = iwl_set_mode(priv, vif);
2096         if (err)
2097                 goto out_err;
2098
2099         /* Add the broadcast address so we can send broadcast frames */
2100         priv->cfg->ops->lib->add_bcast_station(priv);
2101
2102         goto out;
2103
2104  out_err:
2105         priv->vif = NULL;
2106         priv->iw_mode = NL80211_IFTYPE_STATION;
2107  out:
2108         mutex_unlock(&priv->mutex);
2109
2110         IWL_DEBUG_MAC80211(priv, "leave\n");
2111         return err;
2112 }
2113 EXPORT_SYMBOL(iwl_mac_add_interface);
2114
2115 void iwl_mac_remove_interface(struct ieee80211_hw *hw,
2116                               struct ieee80211_vif *vif)
2117 {
2118         struct iwl_priv *priv = hw->priv;
2119
2120         IWL_DEBUG_MAC80211(priv, "enter\n");
2121
2122         mutex_lock(&priv->mutex);
2123
2124         iwl_clear_ucode_stations(priv, true);
2125
2126         if (iwl_is_ready_rf(priv)) {
2127                 iwl_scan_cancel_timeout(priv, 100);
2128                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2129                 iwlcore_commit_rxon(priv);
2130         }
2131         if (priv->vif == vif) {
2132                 priv->vif = NULL;
2133                 memset(priv->bssid, 0, ETH_ALEN);
2134         }
2135         mutex_unlock(&priv->mutex);
2136
2137         IWL_DEBUG_MAC80211(priv, "leave\n");
2138
2139 }
2140 EXPORT_SYMBOL(iwl_mac_remove_interface);
2141
2142 /**
2143  * iwl_mac_config - mac80211 config callback
2144  *
2145  * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
2146  * be set inappropriately and the driver currently sets the hardware up to
2147  * use it whenever needed.
2148  */
2149 int iwl_mac_config(struct ieee80211_hw *hw, u32 changed)
2150 {
2151         struct iwl_priv *priv = hw->priv;
2152         const struct iwl_channel_info *ch_info;
2153         struct ieee80211_conf *conf = &hw->conf;
2154         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
2155         unsigned long flags = 0;
2156         int ret = 0;
2157         u16 ch;
2158         int scan_active = 0;
2159
2160         mutex_lock(&priv->mutex);
2161
2162         IWL_DEBUG_MAC80211(priv, "enter to channel %d changed 0x%X\n",
2163                                         conf->channel->hw_value, changed);
2164
2165         if (unlikely(!priv->cfg->mod_params->disable_hw_scan &&
2166                         test_bit(STATUS_SCANNING, &priv->status))) {
2167                 scan_active = 1;
2168                 IWL_DEBUG_MAC80211(priv, "leave - scanning\n");
2169         }
2170
2171         if (changed & (IEEE80211_CONF_CHANGE_SMPS |
2172                        IEEE80211_CONF_CHANGE_CHANNEL)) {
2173                 /* mac80211 uses static for non-HT which is what we want */
2174                 priv->current_ht_config.smps = conf->smps_mode;
2175
2176                 /*
2177                  * Recalculate chain counts.
2178                  *
2179                  * If monitor mode is enabled then mac80211 will
2180                  * set up the SM PS mode to OFF if an HT channel is
2181                  * configured.
2182                  */
2183                 if (priv->cfg->ops->hcmd->set_rxon_chain)
2184                         priv->cfg->ops->hcmd->set_rxon_chain(priv);
2185         }
2186
2187         /* during scanning mac80211 will delay channel setting until
2188          * scan finish with changed = 0
2189          */
2190         if (!changed || (changed & IEEE80211_CONF_CHANGE_CHANNEL)) {
2191                 if (scan_active)
2192                         goto set_ch_out;
2193
2194                 ch = ieee80211_frequency_to_channel(conf->channel->center_freq);
2195                 ch_info = iwl_get_channel_info(priv, conf->channel->band, ch);
2196                 if (!is_channel_valid(ch_info)) {
2197                         IWL_DEBUG_MAC80211(priv, "leave - invalid channel\n");
2198                         ret = -EINVAL;
2199                         goto set_ch_out;
2200                 }
2201
2202                 spin_lock_irqsave(&priv->lock, flags);
2203
2204                 /* Configure HT40 channels */
2205                 ht_conf->is_ht = conf_is_ht(conf);
2206                 if (ht_conf->is_ht) {
2207                         if (conf_is_ht40_minus(conf)) {
2208                                 ht_conf->extension_chan_offset =
2209                                         IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2210                                 ht_conf->is_40mhz = true;
2211                         } else if (conf_is_ht40_plus(conf)) {
2212                                 ht_conf->extension_chan_offset =
2213                                         IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2214                                 ht_conf->is_40mhz = true;
2215                         } else {
2216                                 ht_conf->extension_chan_offset =
2217                                         IEEE80211_HT_PARAM_CHA_SEC_NONE;
2218                                 ht_conf->is_40mhz = false;
2219                         }
2220                 } else
2221                         ht_conf->is_40mhz = false;
2222                 /* Default to no protection. Protection mode will later be set
2223                  * from BSS config in iwl_ht_conf */
2224                 ht_conf->ht_protection = IEEE80211_HT_OP_MODE_PROTECTION_NONE;
2225
2226                 /* if we are switching from ht to 2.4 clear flags
2227                  * from any ht related info since 2.4 does not
2228                  * support ht */
2229                 if ((le16_to_cpu(priv->staging_rxon.channel) != ch))
2230                         priv->staging_rxon.flags = 0;
2231
2232                 iwl_set_rxon_channel(priv, conf->channel);
2233                 iwl_set_rxon_ht(priv, ht_conf);
2234
2235                 iwl_set_flags_for_band(priv, conf->channel->band);
2236                 spin_unlock_irqrestore(&priv->lock, flags);
2237                 if (iwl_is_associated(priv) &&
2238                     (le16_to_cpu(priv->active_rxon.channel) != ch) &&
2239                     priv->cfg->ops->lib->set_channel_switch) {
2240                         iwl_set_rate(priv);
2241                         /*
2242                          * at this point, staging_rxon has the
2243                          * configuration for channel switch
2244                          */
2245                         ret = priv->cfg->ops->lib->set_channel_switch(priv,
2246                                 ch);
2247                         if (!ret) {
2248                                 iwl_print_rx_config_cmd(priv);
2249                                 goto out;
2250                         }
2251                         priv->switch_rxon.switch_in_progress = false;
2252                 }
2253  set_ch_out:
2254                 /* The list of supported rates and rate mask can be different
2255                  * for each band; since the band may have changed, reset
2256                  * the rate mask to what mac80211 lists */
2257                 iwl_set_rate(priv);
2258         }
2259
2260         if (changed & (IEEE80211_CONF_CHANGE_PS |
2261                         IEEE80211_CONF_CHANGE_IDLE)) {
2262                 ret = iwl_power_update_mode(priv, false);
2263                 if (ret)
2264                         IWL_DEBUG_MAC80211(priv, "Error setting sleep level\n");
2265         }
2266
2267         if (changed & IEEE80211_CONF_CHANGE_POWER) {
2268                 IWL_DEBUG_MAC80211(priv, "TX Power old=%d new=%d\n",
2269                         priv->tx_power_user_lmt, conf->power_level);
2270
2271                 iwl_set_tx_power(priv, conf->power_level, false);
2272         }
2273
2274         if (changed & IEEE80211_CONF_CHANGE_QOS) {
2275                 bool qos_active = !!(conf->flags & IEEE80211_CONF_QOS);
2276
2277                 spin_lock_irqsave(&priv->lock, flags);
2278                 priv->qos_data.qos_active = qos_active;
2279                 iwl_update_qos(priv);
2280                 spin_unlock_irqrestore(&priv->lock, flags);
2281         }
2282
2283         if (!iwl_is_ready(priv)) {
2284                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2285                 goto out;
2286         }
2287
2288         if (scan_active)
2289                 goto out;
2290
2291         if (memcmp(&priv->active_rxon,
2292                    &priv->staging_rxon, sizeof(priv->staging_rxon)))
2293                 iwlcore_commit_rxon(priv);
2294         else
2295                 IWL_DEBUG_INFO(priv, "Not re-sending same RXON configuration.\n");
2296
2297
2298 out:
2299         IWL_DEBUG_MAC80211(priv, "leave\n");
2300         mutex_unlock(&priv->mutex);
2301         return ret;
2302 }
2303 EXPORT_SYMBOL(iwl_mac_config);
2304
2305 void iwl_mac_reset_tsf(struct ieee80211_hw *hw)
2306 {
2307         struct iwl_priv *priv = hw->priv;
2308         unsigned long flags;
2309
2310         mutex_lock(&priv->mutex);
2311         IWL_DEBUG_MAC80211(priv, "enter\n");
2312
2313         spin_lock_irqsave(&priv->lock, flags);
2314         memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_config));
2315         spin_unlock_irqrestore(&priv->lock, flags);
2316
2317         spin_lock_irqsave(&priv->lock, flags);
2318         priv->assoc_id = 0;
2319         priv->assoc_capability = 0;
2320
2321         /* new association get rid of ibss beacon skb */
2322         if (priv->ibss_beacon)
2323                 dev_kfree_skb(priv->ibss_beacon);
2324
2325         priv->ibss_beacon = NULL;
2326
2327         priv->beacon_int = priv->vif->bss_conf.beacon_int;
2328         priv->timestamp = 0;
2329
2330         spin_unlock_irqrestore(&priv->lock, flags);
2331
2332         if (!iwl_is_ready_rf(priv)) {
2333                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2334                 mutex_unlock(&priv->mutex);
2335                 return;
2336         }
2337
2338         /* we are restarting association process
2339          * clear RXON_FILTER_ASSOC_MSK bit
2340          */
2341         iwl_scan_cancel_timeout(priv, 100);
2342         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2343         iwlcore_commit_rxon(priv);
2344
2345         iwl_set_rate(priv);
2346
2347         mutex_unlock(&priv->mutex);
2348
2349         IWL_DEBUG_MAC80211(priv, "leave\n");
2350 }
2351 EXPORT_SYMBOL(iwl_mac_reset_tsf);
2352
2353 int iwl_alloc_txq_mem(struct iwl_priv *priv)
2354 {
2355         if (!priv->txq)
2356                 priv->txq = kzalloc(
2357                         sizeof(struct iwl_tx_queue) * priv->cfg->num_of_queues,
2358                         GFP_KERNEL);
2359         if (!priv->txq) {
2360                 IWL_ERR(priv, "Not enough memory for txq\n");
2361                 return -ENOMEM;
2362         }
2363         return 0;
2364 }
2365 EXPORT_SYMBOL(iwl_alloc_txq_mem);
2366
2367 void iwl_free_txq_mem(struct iwl_priv *priv)
2368 {
2369         kfree(priv->txq);
2370         priv->txq = NULL;
2371 }
2372 EXPORT_SYMBOL(iwl_free_txq_mem);
2373
2374 int iwl_send_wimax_coex(struct iwl_priv *priv)
2375 {
2376         struct iwl_wimax_coex_cmd uninitialized_var(coex_cmd);
2377
2378         if (priv->cfg->support_wimax_coexist) {
2379                 /* UnMask wake up src at associated sleep */
2380                 coex_cmd.flags |= COEX_FLAGS_ASSOC_WA_UNMASK_MSK;
2381
2382                 /* UnMask wake up src at unassociated sleep */
2383                 coex_cmd.flags |= COEX_FLAGS_UNASSOC_WA_UNMASK_MSK;
2384                 memcpy(coex_cmd.sta_prio, cu_priorities,
2385                         sizeof(struct iwl_wimax_coex_event_entry) *
2386                          COEX_NUM_OF_EVENTS);
2387
2388                 /* enabling the coexistence feature */
2389                 coex_cmd.flags |= COEX_FLAGS_COEX_ENABLE_MSK;
2390
2391                 /* enabling the priorities tables */
2392                 coex_cmd.flags |= COEX_FLAGS_STA_TABLE_VALID_MSK;
2393         } else {
2394                 /* coexistence is disabled */
2395                 memset(&coex_cmd, 0, sizeof(coex_cmd));
2396         }
2397         return iwl_send_cmd_pdu(priv, COEX_PRIORITY_TABLE_CMD,
2398                                 sizeof(coex_cmd), &coex_cmd);
2399 }
2400 EXPORT_SYMBOL(iwl_send_wimax_coex);
2401
2402 #ifdef CONFIG_IWLWIFI_DEBUGFS
2403
2404 #define IWL_TRAFFIC_DUMP_SIZE   (IWL_TRAFFIC_ENTRY_SIZE * IWL_TRAFFIC_ENTRIES)
2405
2406 void iwl_reset_traffic_log(struct iwl_priv *priv)
2407 {
2408         priv->tx_traffic_idx = 0;
2409         priv->rx_traffic_idx = 0;
2410         if (priv->tx_traffic)
2411                 memset(priv->tx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
2412         if (priv->rx_traffic)
2413                 memset(priv->rx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
2414 }
2415
2416 int iwl_alloc_traffic_mem(struct iwl_priv *priv)
2417 {
2418         u32 traffic_size = IWL_TRAFFIC_DUMP_SIZE;
2419
2420         if (iwl_debug_level & IWL_DL_TX) {
2421                 if (!priv->tx_traffic) {
2422                         priv->tx_traffic =
2423                                 kzalloc(traffic_size, GFP_KERNEL);
2424                         if (!priv->tx_traffic)
2425                                 return -ENOMEM;
2426                 }
2427         }
2428         if (iwl_debug_level & IWL_DL_RX) {
2429                 if (!priv->rx_traffic) {
2430                         priv->rx_traffic =
2431                                 kzalloc(traffic_size, GFP_KERNEL);
2432                         if (!priv->rx_traffic)
2433                                 return -ENOMEM;
2434                 }
2435         }
2436         iwl_reset_traffic_log(priv);
2437         return 0;
2438 }
2439 EXPORT_SYMBOL(iwl_alloc_traffic_mem);
2440
2441 void iwl_free_traffic_mem(struct iwl_priv *priv)
2442 {
2443         kfree(priv->tx_traffic);
2444         priv->tx_traffic = NULL;
2445
2446         kfree(priv->rx_traffic);
2447         priv->rx_traffic = NULL;
2448 }
2449 EXPORT_SYMBOL(iwl_free_traffic_mem);
2450
2451 void iwl_dbg_log_tx_data_frame(struct iwl_priv *priv,
2452                       u16 length, struct ieee80211_hdr *header)
2453 {
2454         __le16 fc;
2455         u16 len;
2456
2457         if (likely(!(iwl_debug_level & IWL_DL_TX)))
2458                 return;
2459
2460         if (!priv->tx_traffic)
2461                 return;
2462
2463         fc = header->frame_control;
2464         if (ieee80211_is_data(fc)) {
2465                 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
2466                        ? IWL_TRAFFIC_ENTRY_SIZE : length;
2467                 memcpy((priv->tx_traffic +
2468                        (priv->tx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
2469                        header, len);
2470                 priv->tx_traffic_idx =
2471                         (priv->tx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
2472         }
2473 }
2474 EXPORT_SYMBOL(iwl_dbg_log_tx_data_frame);
2475
2476 void iwl_dbg_log_rx_data_frame(struct iwl_priv *priv,
2477                       u16 length, struct ieee80211_hdr *header)
2478 {
2479         __le16 fc;
2480         u16 len;
2481
2482         if (likely(!(iwl_debug_level & IWL_DL_RX)))
2483                 return;
2484
2485         if (!priv->rx_traffic)
2486                 return;
2487
2488         fc = header->frame_control;
2489         if (ieee80211_is_data(fc)) {
2490                 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
2491                        ? IWL_TRAFFIC_ENTRY_SIZE : length;
2492                 memcpy((priv->rx_traffic +
2493                        (priv->rx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
2494                        header, len);
2495                 priv->rx_traffic_idx =
2496                         (priv->rx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
2497         }
2498 }
2499 EXPORT_SYMBOL(iwl_dbg_log_rx_data_frame);
2500
2501 const char *get_mgmt_string(int cmd)
2502 {
2503         switch (cmd) {
2504                 IWL_CMD(MANAGEMENT_ASSOC_REQ);
2505                 IWL_CMD(MANAGEMENT_ASSOC_RESP);
2506                 IWL_CMD(MANAGEMENT_REASSOC_REQ);
2507                 IWL_CMD(MANAGEMENT_REASSOC_RESP);
2508                 IWL_CMD(MANAGEMENT_PROBE_REQ);
2509                 IWL_CMD(MANAGEMENT_PROBE_RESP);
2510                 IWL_CMD(MANAGEMENT_BEACON);
2511                 IWL_CMD(MANAGEMENT_ATIM);
2512                 IWL_CMD(MANAGEMENT_DISASSOC);
2513                 IWL_CMD(MANAGEMENT_AUTH);
2514                 IWL_CMD(MANAGEMENT_DEAUTH);
2515                 IWL_CMD(MANAGEMENT_ACTION);
2516         default:
2517                 return "UNKNOWN";
2518
2519         }
2520 }
2521
2522 const char *get_ctrl_string(int cmd)
2523 {
2524         switch (cmd) {
2525                 IWL_CMD(CONTROL_BACK_REQ);
2526                 IWL_CMD(CONTROL_BACK);
2527                 IWL_CMD(CONTROL_PSPOLL);
2528                 IWL_CMD(CONTROL_RTS);
2529                 IWL_CMD(CONTROL_CTS);
2530                 IWL_CMD(CONTROL_ACK);
2531                 IWL_CMD(CONTROL_CFEND);
2532                 IWL_CMD(CONTROL_CFENDACK);
2533         default:
2534                 return "UNKNOWN";
2535
2536         }
2537 }
2538
2539 void iwl_clear_traffic_stats(struct iwl_priv *priv)
2540 {
2541         memset(&priv->tx_stats, 0, sizeof(struct traffic_stats));
2542         memset(&priv->rx_stats, 0, sizeof(struct traffic_stats));
2543         priv->led_tpt = 0;
2544 }
2545
2546 /*
2547  * if CONFIG_IWLWIFI_DEBUGFS defined, iwl_update_stats function will
2548  * record all the MGMT, CTRL and DATA pkt for both TX and Rx pass.
2549  * Use debugFs to display the rx/rx_statistics
2550  * if CONFIG_IWLWIFI_DEBUGFS not being defined, then no MGMT and CTRL
2551  * information will be recorded, but DATA pkt still will be recorded
2552  * for the reason of iwl_led.c need to control the led blinking based on
2553  * number of tx and rx data.
2554  *
2555  */
2556 void iwl_update_stats(struct iwl_priv *priv, bool is_tx, __le16 fc, u16 len)
2557 {
2558         struct traffic_stats    *stats;
2559
2560         if (is_tx)
2561                 stats = &priv->tx_stats;
2562         else
2563                 stats = &priv->rx_stats;
2564
2565         if (ieee80211_is_mgmt(fc)) {
2566                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
2567                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
2568                         stats->mgmt[MANAGEMENT_ASSOC_REQ]++;
2569                         break;
2570                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP):
2571                         stats->mgmt[MANAGEMENT_ASSOC_RESP]++;
2572                         break;
2573                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
2574                         stats->mgmt[MANAGEMENT_REASSOC_REQ]++;
2575                         break;
2576                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP):
2577                         stats->mgmt[MANAGEMENT_REASSOC_RESP]++;
2578                         break;
2579                 case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ):
2580                         stats->mgmt[MANAGEMENT_PROBE_REQ]++;
2581                         break;
2582                 case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP):
2583                         stats->mgmt[MANAGEMENT_PROBE_RESP]++;
2584                         break;
2585                 case cpu_to_le16(IEEE80211_STYPE_BEACON):
2586                         stats->mgmt[MANAGEMENT_BEACON]++;
2587                         break;
2588                 case cpu_to_le16(IEEE80211_STYPE_ATIM):
2589                         stats->mgmt[MANAGEMENT_ATIM]++;
2590                         break;
2591                 case cpu_to_le16(IEEE80211_STYPE_DISASSOC):
2592                         stats->mgmt[MANAGEMENT_DISASSOC]++;
2593                         break;
2594                 case cpu_to_le16(IEEE80211_STYPE_AUTH):
2595                         stats->mgmt[MANAGEMENT_AUTH]++;
2596                         break;
2597                 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
2598                         stats->mgmt[MANAGEMENT_DEAUTH]++;
2599                         break;
2600                 case cpu_to_le16(IEEE80211_STYPE_ACTION):
2601                         stats->mgmt[MANAGEMENT_ACTION]++;
2602                         break;
2603                 }
2604         } else if (ieee80211_is_ctl(fc)) {
2605                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
2606                 case cpu_to_le16(IEEE80211_STYPE_BACK_REQ):
2607                         stats->ctrl[CONTROL_BACK_REQ]++;
2608                         break;
2609                 case cpu_to_le16(IEEE80211_STYPE_BACK):
2610                         stats->ctrl[CONTROL_BACK]++;
2611                         break;
2612                 case cpu_to_le16(IEEE80211_STYPE_PSPOLL):
2613                         stats->ctrl[CONTROL_PSPOLL]++;
2614                         break;
2615                 case cpu_to_le16(IEEE80211_STYPE_RTS):
2616                         stats->ctrl[CONTROL_RTS]++;
2617                         break;
2618                 case cpu_to_le16(IEEE80211_STYPE_CTS):
2619                         stats->ctrl[CONTROL_CTS]++;
2620                         break;
2621                 case cpu_to_le16(IEEE80211_STYPE_ACK):
2622                         stats->ctrl[CONTROL_ACK]++;
2623                         break;
2624                 case cpu_to_le16(IEEE80211_STYPE_CFEND):
2625                         stats->ctrl[CONTROL_CFEND]++;
2626                         break;
2627                 case cpu_to_le16(IEEE80211_STYPE_CFENDACK):
2628                         stats->ctrl[CONTROL_CFENDACK]++;
2629                         break;
2630                 }
2631         } else {
2632                 /* data */
2633                 stats->data_cnt++;
2634                 stats->data_bytes += len;
2635         }
2636         iwl_leds_background(priv);
2637 }
2638 EXPORT_SYMBOL(iwl_update_stats);
2639 #endif
2640
2641 const static char *get_csr_string(int cmd)
2642 {
2643         switch (cmd) {
2644                 IWL_CMD(CSR_HW_IF_CONFIG_REG);
2645                 IWL_CMD(CSR_INT_COALESCING);
2646                 IWL_CMD(CSR_INT);
2647                 IWL_CMD(CSR_INT_MASK);
2648                 IWL_CMD(CSR_FH_INT_STATUS);
2649                 IWL_CMD(CSR_GPIO_IN);
2650                 IWL_CMD(CSR_RESET);
2651                 IWL_CMD(CSR_GP_CNTRL);
2652                 IWL_CMD(CSR_HW_REV);
2653                 IWL_CMD(CSR_EEPROM_REG);
2654                 IWL_CMD(CSR_EEPROM_GP);
2655                 IWL_CMD(CSR_OTP_GP_REG);
2656                 IWL_CMD(CSR_GIO_REG);
2657                 IWL_CMD(CSR_GP_UCODE_REG);
2658                 IWL_CMD(CSR_GP_DRIVER_REG);
2659                 IWL_CMD(CSR_UCODE_DRV_GP1);
2660                 IWL_CMD(CSR_UCODE_DRV_GP2);
2661                 IWL_CMD(CSR_LED_REG);
2662                 IWL_CMD(CSR_DRAM_INT_TBL_REG);
2663                 IWL_CMD(CSR_GIO_CHICKEN_BITS);
2664                 IWL_CMD(CSR_ANA_PLL_CFG);
2665                 IWL_CMD(CSR_HW_REV_WA_REG);
2666                 IWL_CMD(CSR_DBG_HPET_MEM_REG);
2667         default:
2668                 return "UNKNOWN";
2669
2670         }
2671 }
2672
2673 void iwl_dump_csr(struct iwl_priv *priv)
2674 {
2675         int i;
2676         u32 csr_tbl[] = {
2677                 CSR_HW_IF_CONFIG_REG,
2678                 CSR_INT_COALESCING,
2679                 CSR_INT,
2680                 CSR_INT_MASK,
2681                 CSR_FH_INT_STATUS,
2682                 CSR_GPIO_IN,
2683                 CSR_RESET,
2684                 CSR_GP_CNTRL,
2685                 CSR_HW_REV,
2686                 CSR_EEPROM_REG,
2687                 CSR_EEPROM_GP,
2688                 CSR_OTP_GP_REG,
2689                 CSR_GIO_REG,
2690                 CSR_GP_UCODE_REG,
2691                 CSR_GP_DRIVER_REG,
2692                 CSR_UCODE_DRV_GP1,
2693                 CSR_UCODE_DRV_GP2,
2694                 CSR_LED_REG,
2695                 CSR_DRAM_INT_TBL_REG,
2696                 CSR_GIO_CHICKEN_BITS,
2697                 CSR_ANA_PLL_CFG,
2698                 CSR_HW_REV_WA_REG,
2699                 CSR_DBG_HPET_MEM_REG
2700         };
2701         IWL_ERR(priv, "CSR values:\n");
2702         IWL_ERR(priv, "(2nd byte of CSR_INT_COALESCING is "
2703                 "CSR_INT_PERIODIC_REG)\n");
2704         for (i = 0; i <  ARRAY_SIZE(csr_tbl); i++) {
2705                 IWL_ERR(priv, "  %25s: 0X%08x\n",
2706                         get_csr_string(csr_tbl[i]),
2707                         iwl_read32(priv, csr_tbl[i]));
2708         }
2709 }
2710 EXPORT_SYMBOL(iwl_dump_csr);
2711
2712 const static char *get_fh_string(int cmd)
2713 {
2714         switch (cmd) {
2715                 IWL_CMD(FH_RSCSR_CHNL0_STTS_WPTR_REG);
2716                 IWL_CMD(FH_RSCSR_CHNL0_RBDCB_BASE_REG);
2717                 IWL_CMD(FH_RSCSR_CHNL0_WPTR);
2718                 IWL_CMD(FH_MEM_RCSR_CHNL0_CONFIG_REG);
2719                 IWL_CMD(FH_MEM_RSSR_SHARED_CTRL_REG);
2720                 IWL_CMD(FH_MEM_RSSR_RX_STATUS_REG);
2721                 IWL_CMD(FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV);
2722                 IWL_CMD(FH_TSSR_TX_STATUS_REG);
2723                 IWL_CMD(FH_TSSR_TX_ERROR_REG);
2724         default:
2725                 return "UNKNOWN";
2726
2727         }
2728 }
2729
2730 int iwl_dump_fh(struct iwl_priv *priv, char **buf, bool display)
2731 {
2732         int i;
2733 #ifdef CONFIG_IWLWIFI_DEBUG
2734         int pos = 0;
2735         size_t bufsz = 0;
2736 #endif
2737         u32 fh_tbl[] = {
2738                 FH_RSCSR_CHNL0_STTS_WPTR_REG,
2739                 FH_RSCSR_CHNL0_RBDCB_BASE_REG,
2740                 FH_RSCSR_CHNL0_WPTR,
2741                 FH_MEM_RCSR_CHNL0_CONFIG_REG,
2742                 FH_MEM_RSSR_SHARED_CTRL_REG,
2743                 FH_MEM_RSSR_RX_STATUS_REG,
2744                 FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV,
2745                 FH_TSSR_TX_STATUS_REG,
2746                 FH_TSSR_TX_ERROR_REG
2747         };
2748 #ifdef CONFIG_IWLWIFI_DEBUG
2749         if (display) {
2750                 bufsz = ARRAY_SIZE(fh_tbl) * 48 + 40;
2751                 *buf = kmalloc(bufsz, GFP_KERNEL);
2752                 if (!*buf)
2753                         return -ENOMEM;
2754                 pos += scnprintf(*buf + pos, bufsz - pos,
2755                                 "FH register values:\n");
2756                 for (i = 0; i < ARRAY_SIZE(fh_tbl); i++) {
2757                         pos += scnprintf(*buf + pos, bufsz - pos,
2758                                 "  %34s: 0X%08x\n",
2759                                 get_fh_string(fh_tbl[i]),
2760                                 iwl_read_direct32(priv, fh_tbl[i]));
2761                 }
2762                 return pos;
2763         }
2764 #endif
2765         IWL_ERR(priv, "FH register values:\n");
2766         for (i = 0; i <  ARRAY_SIZE(fh_tbl); i++) {
2767                 IWL_ERR(priv, "  %34s: 0X%08x\n",
2768                         get_fh_string(fh_tbl[i]),
2769                         iwl_read_direct32(priv, fh_tbl[i]));
2770         }
2771         return 0;
2772 }
2773 EXPORT_SYMBOL(iwl_dump_fh);
2774
2775 static void iwl_force_rf_reset(struct iwl_priv *priv)
2776 {
2777         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2778                 return;
2779
2780         if (!iwl_is_associated(priv)) {
2781                 IWL_DEBUG_SCAN(priv, "force reset rejected: not associated\n");
2782                 return;
2783         }
2784         /*
2785          * There is no easy and better way to force reset the radio,
2786          * the only known method is switching channel which will force to
2787          * reset and tune the radio.
2788          * Use internal short scan (single channel) operation to should
2789          * achieve this objective.
2790          * Driver should reset the radio when number of consecutive missed
2791          * beacon, or any other uCode error condition detected.
2792          */
2793         IWL_DEBUG_INFO(priv, "perform radio reset.\n");
2794         iwl_internal_short_hw_scan(priv);
2795 }
2796
2797
2798 int iwl_force_reset(struct iwl_priv *priv, int mode)
2799 {
2800         struct iwl_force_reset *force_reset;
2801
2802         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2803                 return -EINVAL;
2804
2805         if (mode >= IWL_MAX_FORCE_RESET) {
2806                 IWL_DEBUG_INFO(priv, "invalid reset request.\n");
2807                 return -EINVAL;
2808         }
2809         force_reset = &priv->force_reset[mode];
2810         force_reset->reset_request_count++;
2811         if (force_reset->last_force_reset_jiffies &&
2812             time_after(force_reset->last_force_reset_jiffies +
2813             force_reset->reset_duration, jiffies)) {
2814                 IWL_DEBUG_INFO(priv, "force reset rejected\n");
2815                 force_reset->reset_reject_count++;
2816                 return -EAGAIN;
2817         }
2818         force_reset->reset_success_count++;
2819         force_reset->last_force_reset_jiffies = jiffies;
2820         IWL_DEBUG_INFO(priv, "perform force reset (%d)\n", mode);
2821         switch (mode) {
2822         case IWL_RF_RESET:
2823                 iwl_force_rf_reset(priv);
2824                 break;
2825         case IWL_FW_RESET:
2826                 IWL_ERR(priv, "On demand firmware reload\n");
2827                 /* Set the FW error flag -- cleared on iwl_down */
2828                 set_bit(STATUS_FW_ERROR, &priv->status);
2829                 wake_up_interruptible(&priv->wait_command_queue);
2830                 /*
2831                  * Keep the restart process from trying to send host
2832                  * commands by clearing the INIT status bit
2833                  */
2834                 clear_bit(STATUS_READY, &priv->status);
2835                 queue_work(priv->workqueue, &priv->restart);
2836                 break;
2837         }
2838         return 0;
2839 }
2840 EXPORT_SYMBOL(iwl_force_reset);
2841
2842 /**
2843  * iwl_bg_monitor_recover - Timer callback to check for stuck queue and recover
2844  *
2845  * During normal condition (no queue is stuck), the timer is continually set to
2846  * execute every monitor_recover_period milliseconds after the last timer
2847  * expired.  When the queue read_ptr is at the same place, the timer is
2848  * shorten to 100mSecs.  This is
2849  *      1) to reduce the chance that the read_ptr may wrap around (not stuck)
2850  *      2) to detect the stuck queues quicker before the station and AP can
2851  *      disassociate each other.
2852  *
2853  * This function monitors all the tx queues and recover from it if any
2854  * of the queues are stuck.
2855  * 1. It first check the cmd queue for stuck conditions.  If it is stuck,
2856  *      it will recover by resetting the firmware and return.
2857  * 2. Then, it checks for station association.  If it associates it will check
2858  *      other queues.  If any queue is stuck, it will recover by resetting
2859  *      the firmware.
2860  * Note: It the number of times the queue read_ptr to be at the same place to
2861  *      be MAX_REPEAT+1 in order to consider to be stuck.
2862  */
2863 /*
2864  * The maximum number of times the read pointer of the tx queue at the
2865  * same place without considering to be stuck.
2866  */
2867 #define MAX_REPEAT      (2)
2868 static int iwl_check_stuck_queue(struct iwl_priv *priv, int cnt)
2869 {
2870         struct iwl_tx_queue *txq;
2871         struct iwl_queue *q;
2872
2873         txq = &priv->txq[cnt];
2874         q = &txq->q;
2875         /* queue is empty, skip */
2876         if (q->read_ptr != q->write_ptr) {
2877                 if (q->read_ptr == q->last_read_ptr) {
2878                         /* a queue has not been read from last time */
2879                         if (q->repeat_same_read_ptr > MAX_REPEAT) {
2880                                 IWL_ERR(priv,
2881                                         "queue %d stuck %d time. Fw reload.\n",
2882                                         q->id, q->repeat_same_read_ptr);
2883                                 q->repeat_same_read_ptr = 0;
2884                                 iwl_force_reset(priv, IWL_FW_RESET);
2885                         } else {
2886                                 q->repeat_same_read_ptr++;
2887                                 IWL_DEBUG_RADIO(priv,
2888                                                 "queue %d, not read %d time\n",
2889                                                 q->id,
2890                                                 q->repeat_same_read_ptr);
2891                                 mod_timer(&priv->monitor_recover, jiffies +
2892                                         msecs_to_jiffies(IWL_ONE_HUNDRED_MSECS));
2893                         }
2894                         return 1;
2895                 } else {
2896                         q->last_read_ptr = q->read_ptr;
2897                         q->repeat_same_read_ptr = 0;
2898                 }
2899         }
2900         return 0;
2901 }
2902
2903 void iwl_bg_monitor_recover(unsigned long data)
2904 {
2905         struct iwl_priv *priv = (struct iwl_priv *)data;
2906         int cnt;
2907
2908         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2909                 return;
2910
2911         /* monitor and check for stuck cmd queue */
2912         if (iwl_check_stuck_queue(priv, IWL_CMD_QUEUE_NUM))
2913                 return;
2914
2915         /* monitor and check for other stuck queues */
2916         if (iwl_is_associated(priv)) {
2917                 for (cnt = 0; cnt < priv->hw_params.max_txq_num; cnt++) {
2918                         /* skip as we already checked the command queue */
2919                         if (cnt == IWL_CMD_QUEUE_NUM)
2920                                 continue;
2921                         if (iwl_check_stuck_queue(priv, cnt))
2922                                 return;
2923                 }
2924         }
2925         /*
2926          * Reschedule the timer to occur in
2927          * priv->cfg->monitor_recover_period
2928          */
2929         mod_timer(&priv->monitor_recover,
2930                 jiffies + msecs_to_jiffies(priv->cfg->monitor_recover_period));
2931 }
2932 EXPORT_SYMBOL(iwl_bg_monitor_recover);
2933
2934 #ifdef CONFIG_PM
2935
2936 int iwl_pci_suspend(struct pci_dev *pdev, pm_message_t state)
2937 {
2938         struct iwl_priv *priv = pci_get_drvdata(pdev);
2939
2940         /*
2941          * This function is called when system goes into suspend state
2942          * mac80211 will call iwl_mac_stop() from the mac80211 suspend function
2943          * first but since iwl_mac_stop() has no knowledge of who the caller is,
2944          * it will not call apm_ops.stop() to stop the DMA operation.
2945          * Calling apm_ops.stop here to make sure we stop the DMA.
2946          */
2947         priv->cfg->ops->lib->apm_ops.stop(priv);
2948
2949         pci_save_state(pdev);
2950         pci_disable_device(pdev);
2951         pci_set_power_state(pdev, PCI_D3hot);
2952
2953         return 0;
2954 }
2955 EXPORT_SYMBOL(iwl_pci_suspend);
2956
2957 int iwl_pci_resume(struct pci_dev *pdev)
2958 {
2959         struct iwl_priv *priv = pci_get_drvdata(pdev);
2960         int ret;
2961
2962         pci_set_power_state(pdev, PCI_D0);
2963         ret = pci_enable_device(pdev);
2964         if (ret)
2965                 return ret;
2966         pci_restore_state(pdev);
2967         iwl_enable_interrupts(priv);
2968
2969         return 0;
2970 }
2971 EXPORT_SYMBOL(iwl_pci_resume);
2972
2973 #endif /* CONFIG_PM */