SAFE public projects git trees. - safe/jmp/linux-2.6/blob - drivers/net/wireless/iwlwifi/iwl-core.c

   1 /******************************************************************************
   2  *
   3  * GPL LICENSE SUMMARY
   4  *
   5  * Copyright(c) 2008 - 2010 Intel Corporation. All rights reserved.
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of version 2 of the GNU General Public License as
   9  * published by the Free Software Foundation.
  10  *
  11  * This program is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
  19  * USA
  20  *
  21  * The full GNU General Public License is included in this distribution
  22  * in the file called LICENSE.GPL.
  23  *
  24  * Contact Information:
  25  *  Intel Linux Wireless <ilw@linux.intel.com>
  26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27  *****************************************************************************/
  28
  29 #include <linux/kernel.h>
  30 #include <linux/module.h>
  31 #include <linux/etherdevice.h>
  32 #include <linux/sched.h>
  33 #include <net/mac80211.h>
  34
  35 #include "iwl-eeprom.h"
  36 #include "iwl-dev.h" /* FIXME: remove */
  37 #include "iwl-debug.h"
  38 #include "iwl-core.h"
  39 #include "iwl-io.h"
  40 #include "iwl-power.h"
  41 #include "iwl-sta.h"
  42 #include "iwl-helpers.h"
  43
  44
  45 MODULE_DESCRIPTION("iwl core");
  46 MODULE_VERSION(IWLWIFI_VERSION);
  47 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
  48 MODULE_LICENSE("GPL");
  49
  50 /*
  51  * set bt_coex_active to true, uCode will do kill/defer
  52  * every time the priority line is asserted (BT is sending signals on the
  53  * priority line in the PCIx).
  54  * set bt_coex_active to false, uCode will ignore the BT activity and
  55  * perform the normal operation
  56  *
  57  * User might experience transmit issue on some platform due to WiFi/BT
  58  * co-exist problem. The possible behaviors are:
  59  *   Able to scan and finding all the available AP
  60  *   Not able to associate with any AP
  61  * On those platforms, WiFi communication can be restored by set
  62  * "bt_coex_active" module parameter to "false"
  63  *
  64  * default: bt_coex_active = true (BT_COEX_ENABLE)
  65  */
  66 static bool bt_coex_active = true;
  67 module_param(bt_coex_active, bool, S_IRUGO);
  68 MODULE_PARM_DESC(bt_coex_active, "enable wifi/bluetooth co-exist");
  69
  70 static struct iwl_wimax_coex_event_entry cu_priorities[COEX_NUM_OF_EVENTS] = {
  71         {COEX_CU_UNASSOC_IDLE_RP, COEX_CU_UNASSOC_IDLE_WP,
  72          0, COEX_UNASSOC_IDLE_FLAGS},
  73         {COEX_CU_UNASSOC_MANUAL_SCAN_RP, COEX_CU_UNASSOC_MANUAL_SCAN_WP,
  74          0, COEX_UNASSOC_MANUAL_SCAN_FLAGS},
  75         {COEX_CU_UNASSOC_AUTO_SCAN_RP, COEX_CU_UNASSOC_AUTO_SCAN_WP,
  76          0, COEX_UNASSOC_AUTO_SCAN_FLAGS},
  77         {COEX_CU_CALIBRATION_RP, COEX_CU_CALIBRATION_WP,
  78          0, COEX_CALIBRATION_FLAGS},
  79         {COEX_CU_PERIODIC_CALIBRATION_RP, COEX_CU_PERIODIC_CALIBRATION_WP,
  80          0, COEX_PERIODIC_CALIBRATION_FLAGS},
  81         {COEX_CU_CONNECTION_ESTAB_RP, COEX_CU_CONNECTION_ESTAB_WP,
  82          0, COEX_CONNECTION_ESTAB_FLAGS},
  83         {COEX_CU_ASSOCIATED_IDLE_RP, COEX_CU_ASSOCIATED_IDLE_WP,
  84          0, COEX_ASSOCIATED_IDLE_FLAGS},
  85         {COEX_CU_ASSOC_MANUAL_SCAN_RP, COEX_CU_ASSOC_MANUAL_SCAN_WP,
  86          0, COEX_ASSOC_MANUAL_SCAN_FLAGS},
  87         {COEX_CU_ASSOC_AUTO_SCAN_RP, COEX_CU_ASSOC_AUTO_SCAN_WP,
  88          0, COEX_ASSOC_AUTO_SCAN_FLAGS},
  89         {COEX_CU_ASSOC_ACTIVE_LEVEL_RP, COEX_CU_ASSOC_ACTIVE_LEVEL_WP,
  90          0, COEX_ASSOC_ACTIVE_LEVEL_FLAGS},
  91         {COEX_CU_RF_ON_RP, COEX_CU_RF_ON_WP, 0, COEX_CU_RF_ON_FLAGS},
  92         {COEX_CU_RF_OFF_RP, COEX_CU_RF_OFF_WP, 0, COEX_RF_OFF_FLAGS},
  93         {COEX_CU_STAND_ALONE_DEBUG_RP, COEX_CU_STAND_ALONE_DEBUG_WP,
  94          0, COEX_STAND_ALONE_DEBUG_FLAGS},
  95         {COEX_CU_IPAN_ASSOC_LEVEL_RP, COEX_CU_IPAN_ASSOC_LEVEL_WP,
  96          0, COEX_IPAN_ASSOC_LEVEL_FLAGS},
  97         {COEX_CU_RSRVD1_RP, COEX_CU_RSRVD1_WP, 0, COEX_RSRVD1_FLAGS},
  98         {COEX_CU_RSRVD2_RP, COEX_CU_RSRVD2_WP, 0, COEX_RSRVD2_FLAGS}
  99 };
 100
 101 #define IWL_DECLARE_RATE_INFO(r, s, ip, in, rp, rn, pp, np)    \
 102         [IWL_RATE_##r##M_INDEX] = { IWL_RATE_##r##M_PLCP,      \
 103                                     IWL_RATE_SISO_##s##M_PLCP, \
 104                                     IWL_RATE_MIMO2_##s##M_PLCP,\
 105                                     IWL_RATE_MIMO3_##s##M_PLCP,\
 106                                     IWL_RATE_##r##M_IEEE,      \
 107                                     IWL_RATE_##ip##M_INDEX,    \
 108                                     IWL_RATE_##in##M_INDEX,    \
 109                                     IWL_RATE_##rp##M_INDEX,    \
 110                                     IWL_RATE_##rn##M_INDEX,    \
 111                                     IWL_RATE_##pp##M_INDEX,    \
 112                                     IWL_RATE_##np##M_INDEX }
 113
 114 u32 iwl_debug_level;
 115 EXPORT_SYMBOL(iwl_debug_level);
 116
 117 /*
 118  * Parameter order:
 119  *   rate, ht rate, prev rate, next rate, prev tgg rate, next tgg rate
 120  *
 121  * If there isn't a valid next or previous rate then INV is used which
 122  * maps to IWL_RATE_INVALID
 123  *
 124  */
 125 const struct iwl_rate_info iwl_rates[IWL_RATE_COUNT] = {
 126         IWL_DECLARE_RATE_INFO(1, INV, INV, 2, INV, 2, INV, 2),    /*  1mbps */
 127         IWL_DECLARE_RATE_INFO(2, INV, 1, 5, 1, 5, 1, 5),          /*  2mbps */
 128         IWL_DECLARE_RATE_INFO(5, INV, 2, 6, 2, 11, 2, 11),        /*5.5mbps */
 129         IWL_DECLARE_RATE_INFO(11, INV, 9, 12, 9, 12, 5, 18),      /* 11mbps */
 130         IWL_DECLARE_RATE_INFO(6, 6, 5, 9, 5, 11, 5, 11),        /*  6mbps */
 131         IWL_DECLARE_RATE_INFO(9, 6, 6, 11, 6, 11, 5, 11),       /*  9mbps */
 132         IWL_DECLARE_RATE_INFO(12, 12, 11, 18, 11, 18, 11, 18),   /* 12mbps */
 133         IWL_DECLARE_RATE_INFO(18, 18, 12, 24, 12, 24, 11, 24),   /* 18mbps */
 134         IWL_DECLARE_RATE_INFO(24, 24, 18, 36, 18, 36, 18, 36),   /* 24mbps */
 135         IWL_DECLARE_RATE_INFO(36, 36, 24, 48, 24, 48, 24, 48),   /* 36mbps */
 136         IWL_DECLARE_RATE_INFO(48, 48, 36, 54, 36, 54, 36, 54),   /* 48mbps */
 137         IWL_DECLARE_RATE_INFO(54, 54, 48, INV, 48, INV, 48, INV),/* 54mbps */
 138         IWL_DECLARE_RATE_INFO(60, 60, 48, INV, 48, INV, 48, INV),/* 60mbps */
 139         /* FIXME:RS:          ^^    should be INV (legacy) */
 140 };
 141 EXPORT_SYMBOL(iwl_rates);
 142
 143 int iwl_hwrate_to_plcp_idx(u32 rate_n_flags)
 144 {
 145         int idx = 0;
 146
 147         /* HT rate format */
 148         if (rate_n_flags & RATE_MCS_HT_MSK) {
 149                 idx = (rate_n_flags & 0xff);
 150
 151                 if (idx >= IWL_RATE_MIMO3_6M_PLCP)
 152                         idx = idx - IWL_RATE_MIMO3_6M_PLCP;
 153                 else if (idx >= IWL_RATE_MIMO2_6M_PLCP)
 154                         idx = idx - IWL_RATE_MIMO2_6M_PLCP;
 155
 156                 idx += IWL_FIRST_OFDM_RATE;
 157                 /* skip 9M not supported in ht*/
 158                 if (idx >= IWL_RATE_9M_INDEX)
 159                         idx += 1;
 160                 if ((idx >= IWL_FIRST_OFDM_RATE) && (idx <= IWL_LAST_OFDM_RATE))
 161                         return idx;
 162
 163         /* legacy rate format, search for match in table */
 164         } else {
 165                 for (idx = 0; idx < ARRAY_SIZE(iwl_rates); idx++)
 166                         if (iwl_rates[idx].plcp == (rate_n_flags & 0xFF))
 167                                 return idx;
 168         }
 169
 170         return -1;
 171 }
 172 EXPORT_SYMBOL(iwl_hwrate_to_plcp_idx);
 173
 174 u8 iwl_toggle_tx_ant(struct iwl_priv *priv, u8 ant)
 175 {
 176         int i;
 177         u8 ind = ant;
 178         for (i = 0; i < RATE_ANT_NUM - 1; i++) {
 179                 ind = (ind + 1) < RATE_ANT_NUM ?  ind + 1 : 0;
 180                 if (priv->hw_params.valid_tx_ant & BIT(ind))
 181                         return ind;
 182         }
 183         return ant;
 184 }
 185 EXPORT_SYMBOL(iwl_toggle_tx_ant);
 186
 187 const u8 iwl_bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
 188 EXPORT_SYMBOL(iwl_bcast_addr);
 189
 190
 191 /* This function both allocates and initializes hw and priv. */
 192 struct ieee80211_hw *iwl_alloc_all(struct iwl_cfg *cfg,
 193                 struct ieee80211_ops *hw_ops)
 194 {
 195         struct iwl_priv *priv;
 196
 197         /* mac80211 allocates memory for this device instance, including
 198          *   space for this driver's private structure */
 199         struct ieee80211_hw *hw =
 200                 ieee80211_alloc_hw(sizeof(struct iwl_priv), hw_ops);
 201         if (hw == NULL) {
 202                 printk(KERN_ERR "%s: Can not allocate network device\n",
 203                        cfg->name);
 204                 goto out;
 205         }
 206
 207         priv = hw->priv;
 208         priv->hw = hw;
 209
 210 out:
 211         return hw;
 212 }
 213 EXPORT_SYMBOL(iwl_alloc_all);
 214
 215 void iwl_hw_detect(struct iwl_priv *priv)
 216 {
 217         priv->hw_rev = _iwl_read32(priv, CSR_HW_REV);
 218         priv->hw_wa_rev = _iwl_read32(priv, CSR_HW_REV_WA_REG);
 219         pci_read_config_byte(priv->pci_dev, PCI_REVISION_ID, &priv->rev_id);
 220 }
 221 EXPORT_SYMBOL(iwl_hw_detect);
 222
 223 /*
 224  * QoS  support
 225 */
 226 static void iwl_update_qos(struct iwl_priv *priv)
 227 {
 228         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 229                 return;
 230
 231         priv->qos_data.def_qos_parm.qos_flags = 0;
 232
 233         if (priv->qos_data.qos_active)
 234                 priv->qos_data.def_qos_parm.qos_flags |=
 235                         QOS_PARAM_FLG_UPDATE_EDCA_MSK;
 236
 237         if (priv->current_ht_config.is_ht)
 238                 priv->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
 239
 240         IWL_DEBUG_QOS(priv, "send QoS cmd with Qos active=%d FLAGS=0x%X\n",
 241                       priv->qos_data.qos_active,
 242                       priv->qos_data.def_qos_parm.qos_flags);
 243
 244         iwl_send_cmd_pdu_async(priv, REPLY_QOS_PARAM,
 245                                sizeof(struct iwl_qosparam_cmd),
 246                                &priv->qos_data.def_qos_parm, NULL);
 247 }
 248
 249 #define MAX_BIT_RATE_40_MHZ 150 /* Mbps */
 250 #define MAX_BIT_RATE_20_MHZ 72 /* Mbps */
 251 static void iwlcore_init_ht_hw_capab(const struct iwl_priv *priv,
 252                               struct ieee80211_sta_ht_cap *ht_info,
 253                               enum ieee80211_band band)
 254 {
 255         u16 max_bit_rate = 0;
 256         u8 rx_chains_num = priv->hw_params.rx_chains_num;
 257         u8 tx_chains_num = priv->hw_params.tx_chains_num;
 258
 259         ht_info->cap = 0;
 260         memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));
 261
 262         ht_info->ht_supported = true;
 263
 264         if (priv->cfg->ht_greenfield_support)
 265                 ht_info->cap |= IEEE80211_HT_CAP_GRN_FLD;
 266         ht_info->cap |= IEEE80211_HT_CAP_SGI_20;
 267         max_bit_rate = MAX_BIT_RATE_20_MHZ;
 268         if (priv->hw_params.ht40_channel & BIT(band)) {
 269                 ht_info->cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 270                 ht_info->cap |= IEEE80211_HT_CAP_SGI_40;
 271                 ht_info->mcs.rx_mask[4] = 0x01;
 272                 max_bit_rate = MAX_BIT_RATE_40_MHZ;
 273         }
 274
 275         if (priv->cfg->mod_params->amsdu_size_8K)
 276                 ht_info->cap |= IEEE80211_HT_CAP_MAX_AMSDU;
 277
 278         ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
 279         ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;
 280
 281         ht_info->mcs.rx_mask[0] = 0xFF;
 282         if (rx_chains_num >= 2)
 283                 ht_info->mcs.rx_mask[1] = 0xFF;
 284         if (rx_chains_num >= 3)
 285                 ht_info->mcs.rx_mask[2] = 0xFF;
 286
 287         /* Highest supported Rx data rate */
 288         max_bit_rate *= rx_chains_num;
 289         WARN_ON(max_bit_rate & ~IEEE80211_HT_MCS_RX_HIGHEST_MASK);
 290         ht_info->mcs.rx_highest = cpu_to_le16(max_bit_rate);
 291
 292         /* Tx MCS capabilities */
 293         ht_info->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
 294         if (tx_chains_num != rx_chains_num) {
 295                 ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
 296                 ht_info->mcs.tx_params |= ((tx_chains_num - 1) <<
 297                                 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT);
 298         }
 299 }
 300
 301 /**
 302  * iwlcore_init_geos - Initialize mac80211's geo/channel info based from eeprom
 303  */
 304 int iwlcore_init_geos(struct iwl_priv *priv)
 305 {
 306         struct iwl_channel_info *ch;
 307         struct ieee80211_supported_band *sband;
 308         struct ieee80211_channel *channels;
 309         struct ieee80211_channel *geo_ch;
 310         struct ieee80211_rate *rates;
 311         int i = 0;
 312
 313         if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
 314             priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
 315                 IWL_DEBUG_INFO(priv, "Geography modes already initialized.\n");
 316                 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
 317                 return 0;
 318         }
 319
 320         channels = kzalloc(sizeof(struct ieee80211_channel) *
 321                            priv->channel_count, GFP_KERNEL);
 322         if (!channels)
 323                 return -ENOMEM;
 324
 325         rates = kzalloc((sizeof(struct ieee80211_rate) * IWL_RATE_COUNT_LEGACY),
 326                         GFP_KERNEL);
 327         if (!rates) {
 328                 kfree(channels);
 329                 return -ENOMEM;
 330         }
 331
 332         /* 5.2GHz channels start after the 2.4GHz channels */
 333         sband = &priv->bands[IEEE80211_BAND_5GHZ];
 334         sband->channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)];
 335         /* just OFDM */
 336         sband->bitrates = &rates[IWL_FIRST_OFDM_RATE];
 337         sband->n_bitrates = IWL_RATE_COUNT_LEGACY - IWL_FIRST_OFDM_RATE;
 338
 339         if (priv->cfg->sku & IWL_SKU_N)
 340                 iwlcore_init_ht_hw_capab(priv, &sband->ht_cap,
 341                                          IEEE80211_BAND_5GHZ);
 342
 343         sband = &priv->bands[IEEE80211_BAND_2GHZ];
 344         sband->channels = channels;
 345         /* OFDM & CCK */
 346         sband->bitrates = rates;
 347         sband->n_bitrates = IWL_RATE_COUNT_LEGACY;
 348
 349         if (priv->cfg->sku & IWL_SKU_N)
 350                 iwlcore_init_ht_hw_capab(priv, &sband->ht_cap,
 351                                          IEEE80211_BAND_2GHZ);
 352
 353         priv->ieee_channels = channels;
 354         priv->ieee_rates = rates;
 355
 356         for (i = 0;  i < priv->channel_count; i++) {
 357                 ch = &priv->channel_info[i];
 358
 359                 /* FIXME: might be removed if scan is OK */
 360                 if (!is_channel_valid(ch))
 361                         continue;
 362
 363                 if (is_channel_a_band(ch))
 364                         sband =  &priv->bands[IEEE80211_BAND_5GHZ];
 365                 else
 366                         sband =  &priv->bands[IEEE80211_BAND_2GHZ];
 367
 368                 geo_ch = &sband->channels[sband->n_channels++];
 369
 370                 geo_ch->center_freq =
 371                                 ieee80211_channel_to_frequency(ch->channel);
 372                 geo_ch->max_power = ch->max_power_avg;
 373                 geo_ch->max_antenna_gain = 0xff;
 374                 geo_ch->hw_value = ch->channel;
 375
 376                 if (is_channel_valid(ch)) {
 377                         if (!(ch->flags & EEPROM_CHANNEL_IBSS))
 378                                 geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
 379
 380                         if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
 381                                 geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
 382
 383                         if (ch->flags & EEPROM_CHANNEL_RADAR)
 384                                 geo_ch->flags |= IEEE80211_CHAN_RADAR;
 385
 386                         geo_ch->flags |= ch->ht40_extension_channel;
 387
 388                         if (ch->max_power_avg > priv->tx_power_device_lmt)
 389                                 priv->tx_power_device_lmt = ch->max_power_avg;
 390                 } else {
 391                         geo_ch->flags |= IEEE80211_CHAN_DISABLED;
 392                 }
 393
 394                 IWL_DEBUG_INFO(priv, "Channel %d Freq=%d[%sGHz] %s flag=0x%X\n",
 395                                 ch->channel, geo_ch->center_freq,
 396                                 is_channel_a_band(ch) ?  "5.2" : "2.4",
 397                                 geo_ch->flags & IEEE80211_CHAN_DISABLED ?
 398                                 "restricted" : "valid",
 399                                  geo_ch->flags);
 400         }
 401
 402         if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) &&
 403              priv->cfg->sku & IWL_SKU_A) {
 404                 IWL_INFO(priv, "Incorrectly detected BG card as ABG. "
 405                         "Please send your PCI ID 0x%04X:0x%04X to maintainer.\n",
 406                            priv->pci_dev->device,
 407                            priv->pci_dev->subsystem_device);
 408                 priv->cfg->sku &= ~IWL_SKU_A;
 409         }
 410
 411         IWL_INFO(priv, "Tunable channels: %d 802.11bg, %d 802.11a channels\n",
 412                    priv->bands[IEEE80211_BAND_2GHZ].n_channels,
 413                    priv->bands[IEEE80211_BAND_5GHZ].n_channels);
 414
 415         set_bit(STATUS_GEO_CONFIGURED, &priv->status);
 416
 417         return 0;
 418 }
 419 EXPORT_SYMBOL(iwlcore_init_geos);
 420
 421 /*
 422  * iwlcore_free_geos - undo allocations in iwlcore_init_geos
 423  */
 424 void iwlcore_free_geos(struct iwl_priv *priv)
 425 {
 426         kfree(priv->ieee_channels);
 427         kfree(priv->ieee_rates);
 428         clear_bit(STATUS_GEO_CONFIGURED, &priv->status);
 429 }
 430 EXPORT_SYMBOL(iwlcore_free_geos);
 431
 432 /*
 433  *  iwlcore_rts_tx_cmd_flag: Set rts/cts. 3945 and 4965 only share this
 434  *  function.
 435  */
 436 void iwlcore_rts_tx_cmd_flag(struct ieee80211_tx_info *info,
 437                                 __le32 *tx_flags)
 438 {
 439         if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) {
 440                 *tx_flags |= TX_CMD_FLG_RTS_MSK;
 441                 *tx_flags &= ~TX_CMD_FLG_CTS_MSK;
 442         } else if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
 443                 *tx_flags &= ~TX_CMD_FLG_RTS_MSK;
 444                 *tx_flags |= TX_CMD_FLG_CTS_MSK;
 445         }
 446 }
 447 EXPORT_SYMBOL(iwlcore_rts_tx_cmd_flag);
 448
 449 static bool is_single_rx_stream(struct iwl_priv *priv)
 450 {
 451         return priv->current_ht_config.smps == IEEE80211_SMPS_STATIC ||
 452                priv->current_ht_config.single_chain_sufficient;
 453 }
 454
 455 static u8 iwl_is_channel_extension(struct iwl_priv *priv,
 456                                    enum ieee80211_band band,
 457                                    u16 channel, u8 extension_chan_offset)
 458 {
 459         const struct iwl_channel_info *ch_info;
 460
 461         ch_info = iwl_get_channel_info(priv, band, channel);
 462         if (!is_channel_valid(ch_info))
 463                 return 0;
 464
 465         if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE)
 466                 return !(ch_info->ht40_extension_channel &
 467                                         IEEE80211_CHAN_NO_HT40PLUS);
 468         else if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW)
 469                 return !(ch_info->ht40_extension_channel &
 470                                         IEEE80211_CHAN_NO_HT40MINUS);
 471
 472         return 0;
 473 }
 474
 475 u8 iwl_is_ht40_tx_allowed(struct iwl_priv *priv,
 476                          struct ieee80211_sta_ht_cap *sta_ht_inf)
 477 {
 478         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
 479
 480         if (!ht_conf->is_ht || !ht_conf->is_40mhz)
 481                 return 0;
 482
 483         /* We do not check for IEEE80211_HT_CAP_SUP_WIDTH_20_40
 484          * the bit will not set if it is pure 40MHz case
 485          */
 486         if (sta_ht_inf) {
 487                 if (!sta_ht_inf->ht_supported)
 488                         return 0;
 489         }
 490 #ifdef CONFIG_IWLWIFI_DEBUG
 491         if (priv->disable_ht40)
 492                 return 0;
 493 #endif
 494         return iwl_is_channel_extension(priv, priv->band,
 495                         le16_to_cpu(priv->staging_rxon.channel),
 496                         ht_conf->extension_chan_offset);
 497 }
 498 EXPORT_SYMBOL(iwl_is_ht40_tx_allowed);
 499
 500 static u16 iwl_adjust_beacon_interval(u16 beacon_val, u16 max_beacon_val)
 501 {
 502         u16 new_val = 0;
 503         u16 beacon_factor = 0;
 504
 505         beacon_factor = (beacon_val + max_beacon_val) / max_beacon_val;
 506         new_val = beacon_val / beacon_factor;
 507
 508         if (!new_val)
 509                 new_val = max_beacon_val;
 510
 511         return new_val;
 512 }
 513
 514 void iwl_setup_rxon_timing(struct iwl_priv *priv)
 515 {
 516         u64 tsf;
 517         s32 interval_tm, rem;
 518         unsigned long flags;
 519         struct ieee80211_conf *conf = NULL;
 520         u16 beacon_int;
 521
 522         conf = ieee80211_get_hw_conf(priv->hw);
 523
 524         spin_lock_irqsave(&priv->lock, flags);
 525         priv->rxon_timing.timestamp = cpu_to_le64(priv->timestamp);
 526         priv->rxon_timing.listen_interval = cpu_to_le16(conf->listen_interval);
 527
 528         if (priv->iw_mode == NL80211_IFTYPE_STATION) {
 529                 beacon_int = priv->beacon_int;
 530                 priv->rxon_timing.atim_window = 0;
 531         } else {
 532                 beacon_int = priv->vif->bss_conf.beacon_int;
 533
 534                 /* TODO: we need to get atim_window from upper stack
 535                  * for now we set to 0 */
 536                 priv->rxon_timing.atim_window = 0;
 537         }
 538
 539         beacon_int = iwl_adjust_beacon_interval(beacon_int,
 540                                 priv->hw_params.max_beacon_itrvl * 1024);
 541         priv->rxon_timing.beacon_interval = cpu_to_le16(beacon_int);
 542
 543         tsf = priv->timestamp; /* tsf is modifed by do_div: copy it */
 544         interval_tm = beacon_int * 1024;
 545         rem = do_div(tsf, interval_tm);
 546         priv->rxon_timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
 547
 548         spin_unlock_irqrestore(&priv->lock, flags);
 549         IWL_DEBUG_ASSOC(priv,
 550                         "beacon interval %d beacon timer %d beacon tim %d\n",
 551                         le16_to_cpu(priv->rxon_timing.beacon_interval),
 552                         le32_to_cpu(priv->rxon_timing.beacon_init_val),
 553                         le16_to_cpu(priv->rxon_timing.atim_window));
 554 }
 555 EXPORT_SYMBOL(iwl_setup_rxon_timing);
 556
 557 void iwl_set_rxon_hwcrypto(struct iwl_priv *priv, int hw_decrypt)
 558 {
 559         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
 560
 561         if (hw_decrypt)
 562                 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
 563         else
 564                 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
 565
 566 }
 567 EXPORT_SYMBOL(iwl_set_rxon_hwcrypto);
 568
 569 /**
 570  * iwl_check_rxon_cmd - validate RXON structure is valid
 571  *
 572  * NOTE:  This is really only useful during development and can eventually
 573  * be #ifdef'd out once the driver is stable and folks aren't actively
 574  * making changes
 575  */
 576 int iwl_check_rxon_cmd(struct iwl_priv *priv)
 577 {
 578         int error = 0;
 579         int counter = 1;
 580         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
 581
 582         if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
 583                 error |= le32_to_cpu(rxon->flags &
 584                                 (RXON_FLG_TGJ_NARROW_BAND_MSK |
 585                                  RXON_FLG_RADAR_DETECT_MSK));
 586                 if (error)
 587                         IWL_WARN(priv, "check 24G fields %d | %d\n",
 588                                     counter++, error);
 589         } else {
 590                 error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ?
 591                                 0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK);
 592                 if (error)
 593                         IWL_WARN(priv, "check 52 fields %d | %d\n",
 594                                     counter++, error);
 595                 error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK);
 596                 if (error)
 597                         IWL_WARN(priv, "check 52 CCK %d | %d\n",
 598                                     counter++, error);
 599         }
 600         error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1;
 601         if (error)
 602                 IWL_WARN(priv, "check mac addr %d | %d\n", counter++, error);
 603
 604         /* make sure basic rates 6Mbps and 1Mbps are supported */
 605         error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) &&
 606                   ((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0));
 607         if (error)
 608                 IWL_WARN(priv, "check basic rate %d | %d\n", counter++, error);
 609
 610         error |= (le16_to_cpu(rxon->assoc_id) > 2007);
 611         if (error)
 612                 IWL_WARN(priv, "check assoc id %d | %d\n", counter++, error);
 613
 614         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
 615                         == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK));
 616         if (error)
 617                 IWL_WARN(priv, "check CCK and short slot %d | %d\n",
 618                             counter++, error);
 619
 620         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
 621                         == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK));
 622         if (error)
 623                 IWL_WARN(priv, "check CCK & auto detect %d | %d\n",
 624                             counter++, error);
 625
 626         error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
 627                         RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK);
 628         if (error)
 629                 IWL_WARN(priv, "check TGG and auto detect %d | %d\n",
 630                             counter++, error);
 631
 632         if (error)
 633                 IWL_WARN(priv, "Tuning to channel %d\n",
 634                             le16_to_cpu(rxon->channel));
 635
 636         if (error) {
 637                 IWL_ERR(priv, "Not a valid iwl_rxon_assoc_cmd field values\n");
 638                 return -1;
 639         }
 640         return 0;
 641 }
 642 EXPORT_SYMBOL(iwl_check_rxon_cmd);
 643
 644 /**
 645  * iwl_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
 646  * @priv: staging_rxon is compared to active_rxon
 647  *
 648  * If the RXON structure is changing enough to require a new tune,
 649  * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
 650  * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
 651  */
 652 int iwl_full_rxon_required(struct iwl_priv *priv)
 653 {
 654
 655         /* These items are only settable from the full RXON command */
 656         if (!(iwl_is_associated(priv)) ||
 657             compare_ether_addr(priv->staging_rxon.bssid_addr,
 658                                priv->active_rxon.bssid_addr) ||
 659             compare_ether_addr(priv->staging_rxon.node_addr,
 660                                priv->active_rxon.node_addr) ||
 661             compare_ether_addr(priv->staging_rxon.wlap_bssid_addr,
 662                                priv->active_rxon.wlap_bssid_addr) ||
 663             (priv->staging_rxon.dev_type != priv->active_rxon.dev_type) ||
 664             (priv->staging_rxon.channel != priv->active_rxon.channel) ||
 665             (priv->staging_rxon.air_propagation !=
 666              priv->active_rxon.air_propagation) ||
 667             (priv->staging_rxon.ofdm_ht_single_stream_basic_rates !=
 668              priv->active_rxon.ofdm_ht_single_stream_basic_rates) ||
 669             (priv->staging_rxon.ofdm_ht_dual_stream_basic_rates !=
 670              priv->active_rxon.ofdm_ht_dual_stream_basic_rates) ||
 671             (priv->staging_rxon.ofdm_ht_triple_stream_basic_rates !=
 672              priv->active_rxon.ofdm_ht_triple_stream_basic_rates) ||
 673             (priv->staging_rxon.assoc_id != priv->active_rxon.assoc_id))
 674                 return 1;
 675
 676         /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
 677          * be updated with the RXON_ASSOC command -- however only some
 678          * flag transitions are allowed using RXON_ASSOC */
 679
 680         /* Check if we are not switching bands */
 681         if ((priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) !=
 682             (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK))
 683                 return 1;
 684
 685         /* Check if we are switching association toggle */
 686         if ((priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) !=
 687                 (priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK))
 688                 return 1;
 689
 690         return 0;
 691 }
 692 EXPORT_SYMBOL(iwl_full_rxon_required);
 693
 694 u8 iwl_rate_get_lowest_plcp(struct iwl_priv *priv)
 695 {
 696         /*
 697          * Assign the lowest rate -- should really get this from
 698          * the beacon skb from mac80211.
 699          */
 700         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)
 701                 return IWL_RATE_1M_PLCP;
 702         else
 703                 return IWL_RATE_6M_PLCP;
 704 }
 705 EXPORT_SYMBOL(iwl_rate_get_lowest_plcp);
 706
 707 void iwl_set_rxon_ht(struct iwl_priv *priv, struct iwl_ht_config *ht_conf)
 708 {
 709         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
 710
 711         if (!ht_conf->is_ht) {
 712                 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
 713                         RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK |
 714                         RXON_FLG_HT40_PROT_MSK |
 715                         RXON_FLG_HT_PROT_MSK);
 716                 return;
 717         }
 718
 719         /* FIXME: if the definition of ht_protection changed, the "translation"
 720          * will be needed for rxon->flags
 721          */
 722         rxon->flags |= cpu_to_le32(ht_conf->ht_protection << RXON_FLG_HT_OPERATING_MODE_POS);
 723
 724         /* Set up channel bandwidth:
 725          * 20 MHz only, 20/40 mixed or pure 40 if ht40 ok */
 726         /* clear the HT channel mode before set the mode */
 727         rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
 728                          RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
 729         if (iwl_is_ht40_tx_allowed(priv, NULL)) {
 730                 /* pure ht40 */
 731                 if (ht_conf->ht_protection == IEEE80211_HT_OP_MODE_PROTECTION_20MHZ) {
 732                         rxon->flags |= RXON_FLG_CHANNEL_MODE_PURE_40;
 733                         /* Note: control channel is opposite of extension channel */
 734                         switch (ht_conf->extension_chan_offset) {
 735                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 736                                 rxon->flags &= ~RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
 737                                 break;
 738                         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 739                                 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
 740                                 break;
 741                         }
 742                 } else {
 743                         /* Note: control channel is opposite of extension channel */
 744                         switch (ht_conf->extension_chan_offset) {
 745                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 746                                 rxon->flags &= ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
 747                                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
 748                                 break;
 749                         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 750                                 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
 751                                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
 752                                 break;
 753                         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
 754                         default:
 755                                 /* channel location only valid if in Mixed mode */
 756                                 IWL_ERR(priv, "invalid extension channel offset\n");
 757                                 break;
 758                         }
 759                 }
 760         } else {
 761                 rxon->flags |= RXON_FLG_CHANNEL_MODE_LEGACY;
 762         }
 763
 764         if (priv->cfg->ops->hcmd->set_rxon_chain)
 765                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
 766
 767         IWL_DEBUG_ASSOC(priv, "rxon flags 0x%X operation mode :0x%X "
 768                         "extension channel offset 0x%x\n",
 769                         le32_to_cpu(rxon->flags), ht_conf->ht_protection,
 770                         ht_conf->extension_chan_offset);
 771         return;
 772 }
 773 EXPORT_SYMBOL(iwl_set_rxon_ht);
 774
 775 #define IWL_NUM_RX_CHAINS_MULTIPLE      3
 776 #define IWL_NUM_RX_CHAINS_SINGLE        2
 777 #define IWL_NUM_IDLE_CHAINS_DUAL        2
 778 #define IWL_NUM_IDLE_CHAINS_SINGLE      1
 779
 780 /*
 781  * Determine how many receiver/antenna chains to use.
 782  *
 783  * More provides better reception via diversity.  Fewer saves power
 784  * at the expense of throughput, but only when not in powersave to
 785  * start with.
 786  *
 787  * MIMO (dual stream) requires at least 2, but works better with 3.
 788  * This does not determine *which* chains to use, just how many.
 789  */
 790 static int iwl_get_active_rx_chain_count(struct iwl_priv *priv)
 791 {
 792         /* # of Rx chains to use when expecting MIMO. */
 793         if (is_single_rx_stream(priv))
 794                 return IWL_NUM_RX_CHAINS_SINGLE;
 795         else
 796                 return IWL_NUM_RX_CHAINS_MULTIPLE;
 797 }
 798
 799 /*
 800  * When we are in power saving mode, unless device support spatial
 801  * multiplexing power save, use the active count for rx chain count.
 802  */
 803 static int iwl_get_idle_rx_chain_count(struct iwl_priv *priv, int active_cnt)
 804 {
 805         /* # Rx chains when idling, depending on SMPS mode */
 806         switch (priv->current_ht_config.smps) {
 807         case IEEE80211_SMPS_STATIC:
 808         case IEEE80211_SMPS_DYNAMIC:
 809                 return IWL_NUM_IDLE_CHAINS_SINGLE;
 810         case IEEE80211_SMPS_OFF:
 811                 return active_cnt;
 812         default:
 813                 WARN(1, "invalid SMPS mode %d",
 814                      priv->current_ht_config.smps);
 815                 return active_cnt;
 816         }
 817 }
 818
 819 /* up to 4 chains */
 820 static u8 iwl_count_chain_bitmap(u32 chain_bitmap)
 821 {
 822         u8 res;
 823         res = (chain_bitmap & BIT(0)) >> 0;
 824         res += (chain_bitmap & BIT(1)) >> 1;
 825         res += (chain_bitmap & BIT(2)) >> 2;
 826         res += (chain_bitmap & BIT(3)) >> 3;
 827         return res;
 828 }
 829
 830 /**
 831  * iwl_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 bool iwl_is_monitor_mode(struct iwl_priv *priv)
 838 {
 839         return !!(priv->staging_rxon.filter_flags & RXON_FILTER_PROMISC_MSK);
 840 }
 841 EXPORT_SYMBOL(iwl_is_monitor_mode);
 842
 843 /**
 844  * iwl_set_rxon_chain - Set up Rx chain usage in "staging" RXON image
 845  *
 846  * Selects how many and which Rx receivers/antennas/chains to use.
 847  * This should not be used for scan command ... it puts data in wrong place.
 848  */
 849 void iwl_set_rxon_chain(struct iwl_priv *priv)
 850 {
 851         bool is_single = is_single_rx_stream(priv);
 852         bool is_cam = !test_bit(STATUS_POWER_PMI, &priv->status);
 853         u8 idle_rx_cnt, active_rx_cnt, valid_rx_cnt;
 854         u32 active_chains;
 855         u16 rx_chain;
 856
 857         /* Tell uCode which antennas are actually connected.
 858          * Before first association, we assume all antennas are connected.
 859          * Just after first association, iwl_chain_noise_calibration()
 860          *    checks which antennas actually *are* connected. */
 861          if (priv->chain_noise_data.active_chains)
 862                 active_chains = priv->chain_noise_data.active_chains;
 863         else
 864                 active_chains = priv->hw_params.valid_rx_ant;
 865
 866         rx_chain = active_chains << RXON_RX_CHAIN_VALID_POS;
 867
 868         /* How many receivers should we use? */
 869         active_rx_cnt = iwl_get_active_rx_chain_count(priv);
 870         idle_rx_cnt = iwl_get_idle_rx_chain_count(priv, active_rx_cnt);
 871
 872
 873         /* correct rx chain count according hw settings
 874          * and chain noise calibration
 875          */
 876         valid_rx_cnt = iwl_count_chain_bitmap(active_chains);
 877         if (valid_rx_cnt < active_rx_cnt)
 878                 active_rx_cnt = valid_rx_cnt;
 879
 880         if (valid_rx_cnt < idle_rx_cnt)
 881                 idle_rx_cnt = valid_rx_cnt;
 882
 883         rx_chain |= active_rx_cnt << RXON_RX_CHAIN_MIMO_CNT_POS;
 884         rx_chain |= idle_rx_cnt  << RXON_RX_CHAIN_CNT_POS;
 885
 886         /* copied from 'iwl_bg_request_scan()' */
 887         /* Force use of chains B and C (0x6) for Rx
 888          * Avoid A (0x1) for the device has off-channel reception on A-band.
 889          * MIMO is not used here, but value is required */
 890         if (iwl_is_monitor_mode(priv) &&
 891             !(priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) &&
 892             priv->cfg->off_channel_workaround) {
 893                 rx_chain = ANT_ABC << RXON_RX_CHAIN_VALID_POS;
 894                 rx_chain |= ANT_BC << RXON_RX_CHAIN_FORCE_SEL_POS;
 895                 rx_chain |= ANT_ABC << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS;
 896                 rx_chain |= 0x1 << RXON_RX_CHAIN_DRIVER_FORCE_POS;
 897         }
 898
 899         priv->staging_rxon.rx_chain = cpu_to_le16(rx_chain);
 900
 901         if (!is_single && (active_rx_cnt >= IWL_NUM_RX_CHAINS_SINGLE) && is_cam)
 902                 priv->staging_rxon.rx_chain |= RXON_RX_CHAIN_MIMO_FORCE_MSK;
 903         else
 904                 priv->staging_rxon.rx_chain &= ~RXON_RX_CHAIN_MIMO_FORCE_MSK;
 905
 906         IWL_DEBUG_ASSOC(priv, "rx_chain=0x%X active=%d idle=%d\n",
 907                         priv->staging_rxon.rx_chain,
 908                         active_rx_cnt, idle_rx_cnt);
 909
 910         WARN_ON(active_rx_cnt == 0 || idle_rx_cnt == 0 ||
 911                 active_rx_cnt < idle_rx_cnt);
 912 }
 913 EXPORT_SYMBOL(iwl_set_rxon_chain);
 914
 915 /**
 916  * iwl_set_rxon_channel - Set the phymode and channel values in staging RXON
 917  * @phymode: MODE_IEEE80211A sets to 5.2GHz; all else set to 2.4GHz
 918  * @channel: Any channel valid for the requested phymode
 919
 920  * In addition to setting the staging RXON, priv->phymode is also set.
 921  *
 922  * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
 923  * in the staging RXON flag structure based on the phymode
 924  */
 925 int iwl_set_rxon_channel(struct iwl_priv *priv, struct ieee80211_channel *ch)
 926 {
 927         enum ieee80211_band band = ch->band;
 928         u16 channel = ieee80211_frequency_to_channel(ch->center_freq);
 929
 930         if (!iwl_get_channel_info(priv, band, channel)) {
 931                 IWL_DEBUG_INFO(priv, "Could not set channel to %d [%d]\n",
 932                                channel, band);
 933                 return -EINVAL;
 934         }
 935
 936         if ((le16_to_cpu(priv->staging_rxon.channel) == channel) &&
 937             (priv->band == band))
 938                 return 0;
 939
 940         priv->staging_rxon.channel = cpu_to_le16(channel);
 941         if (band == IEEE80211_BAND_5GHZ)
 942                 priv->staging_rxon.flags &= ~RXON_FLG_BAND_24G_MSK;
 943         else
 944                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
 945
 946         priv->band = band;
 947
 948         IWL_DEBUG_INFO(priv, "Staging channel set to %d [%d]\n", channel, band);
 949
 950         return 0;
 951 }
 952 EXPORT_SYMBOL(iwl_set_rxon_channel);
 953
 954 void iwl_set_flags_for_band(struct iwl_priv *priv,
 955                             enum ieee80211_band band)
 956 {
 957         if (band == IEEE80211_BAND_5GHZ) {
 958                 priv->staging_rxon.flags &=
 959                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
 960                       | RXON_FLG_CCK_MSK);
 961                 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
 962         } else {
 963                 /* Copied from iwl_post_associate() */
 964                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
 965                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
 966                 else
 967                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
 968
 969                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
 970                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
 971
 972                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
 973                 priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
 974                 priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
 975         }
 976 }
 977
 978 /*
 979  * initialize rxon structure with default values from eeprom
 980  */
 981 void iwl_connection_init_rx_config(struct iwl_priv *priv, int mode)
 982 {
 983         const struct iwl_channel_info *ch_info;
 984
 985         memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
 986
 987         switch (mode) {
 988         case NL80211_IFTYPE_AP:
 989                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
 990                 break;
 991
 992         case NL80211_IFTYPE_STATION:
 993                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
 994                 priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
 995                 break;
 996
 997         case NL80211_IFTYPE_ADHOC:
 998                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
 999                 priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
1000                 priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
1001                                                   RXON_FILTER_ACCEPT_GRP_MSK;
1002                 break;
1003
1004         default:
1005                 IWL_ERR(priv, "Unsupported interface type %d\n", mode);
1006                 break;
1007         }
1008
1009 #if 0
1010         /* TODO:  Figure out when short_preamble would be set and cache from
1011          * that */
1012         if (!hw_to_local(priv->hw)->short_preamble)
1013                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
1014         else
1015                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
1016 #endif
1017
1018         ch_info = iwl_get_channel_info(priv, priv->band,
1019                                        le16_to_cpu(priv->active_rxon.channel));
1020
1021         if (!ch_info)
1022                 ch_info = &priv->channel_info[0];
1023
1024         priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
1025         priv->band = ch_info->band;
1026
1027         iwl_set_flags_for_band(priv, priv->band);
1028
1029         priv->staging_rxon.ofdm_basic_rates =
1030             (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
1031         priv->staging_rxon.cck_basic_rates =
1032             (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
1033
1034         /* clear both MIX and PURE40 mode flag */
1035         priv->staging_rxon.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED |
1036                                         RXON_FLG_CHANNEL_MODE_PURE_40);
1037         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
1038         memcpy(priv->staging_rxon.wlap_bssid_addr, priv->mac_addr, ETH_ALEN);
1039         priv->staging_rxon.ofdm_ht_single_stream_basic_rates = 0xff;
1040         priv->staging_rxon.ofdm_ht_dual_stream_basic_rates = 0xff;
1041         priv->staging_rxon.ofdm_ht_triple_stream_basic_rates = 0xff;
1042 }
1043 EXPORT_SYMBOL(iwl_connection_init_rx_config);
1044
1045 static void iwl_set_rate(struct iwl_priv *priv)
1046 {
1047         const struct ieee80211_supported_band *hw = NULL;
1048         struct ieee80211_rate *rate;
1049         int i;
1050
1051         hw = iwl_get_hw_mode(priv, priv->band);
1052         if (!hw) {
1053                 IWL_ERR(priv, "Failed to set rate: unable to get hw mode\n");
1054                 return;
1055         }
1056
1057         priv->active_rate = 0;
1058
1059         for (i = 0; i < hw->n_bitrates; i++) {
1060                 rate = &(hw->bitrates[i]);
1061                 if (rate->hw_value < IWL_RATE_COUNT_LEGACY)
1062                         priv->active_rate |= (1 << rate->hw_value);
1063         }
1064
1065         IWL_DEBUG_RATE(priv, "Set active_rate = %0x\n", priv->active_rate);
1066
1067         priv->staging_rxon.cck_basic_rates =
1068             (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
1069
1070         priv->staging_rxon.ofdm_basic_rates =
1071            (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
1072 }
1073
1074 void iwl_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
1075 {
1076         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1077         struct iwl_rxon_cmd *rxon = (void *)&priv->active_rxon;
1078         struct iwl_csa_notification *csa = &(pkt->u.csa_notif);
1079
1080         if (priv->switch_rxon.switch_in_progress) {
1081                 if (!le32_to_cpu(csa->status) &&
1082                     (csa->channel == priv->switch_rxon.channel)) {
1083                         rxon->channel = csa->channel;
1084                         priv->staging_rxon.channel = csa->channel;
1085                         IWL_DEBUG_11H(priv, "CSA notif: channel %d\n",
1086                               le16_to_cpu(csa->channel));
1087                 } else
1088                         IWL_ERR(priv, "CSA notif (fail) : channel %d\n",
1089                               le16_to_cpu(csa->channel));
1090
1091                 priv->switch_rxon.switch_in_progress = false;
1092         }
1093 }
1094 EXPORT_SYMBOL(iwl_rx_csa);
1095
1096 #ifdef CONFIG_IWLWIFI_DEBUG
1097 void iwl_print_rx_config_cmd(struct iwl_priv *priv)
1098 {
1099         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
1100
1101         IWL_DEBUG_RADIO(priv, "RX CONFIG:\n");
1102         iwl_print_hex_dump(priv, IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
1103         IWL_DEBUG_RADIO(priv, "u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
1104         IWL_DEBUG_RADIO(priv, "u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
1105         IWL_DEBUG_RADIO(priv, "u32 filter_flags: 0x%08x\n",
1106                         le32_to_cpu(rxon->filter_flags));
1107         IWL_DEBUG_RADIO(priv, "u8 dev_type: 0x%x\n", rxon->dev_type);
1108         IWL_DEBUG_RADIO(priv, "u8 ofdm_basic_rates: 0x%02x\n",
1109                         rxon->ofdm_basic_rates);
1110         IWL_DEBUG_RADIO(priv, "u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
1111         IWL_DEBUG_RADIO(priv, "u8[6] node_addr: %pM\n", rxon->node_addr);
1112         IWL_DEBUG_RADIO(priv, "u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
1113         IWL_DEBUG_RADIO(priv, "u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
1114 }
1115 EXPORT_SYMBOL(iwl_print_rx_config_cmd);
1116 #endif
1117 /**
1118  * iwl_irq_handle_error - called for HW or SW error interrupt from card
1119  */
1120 void iwl_irq_handle_error(struct iwl_priv *priv)
1121 {
1122         /* Set the FW error flag -- cleared on iwl_down */
1123         set_bit(STATUS_FW_ERROR, &priv->status);
1124
1125         /* Cancel currently queued command. */
1126         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
1127
1128         priv->cfg->ops->lib->dump_nic_error_log(priv);
1129         if (priv->cfg->ops->lib->dump_csr)
1130                 priv->cfg->ops->lib->dump_csr(priv);
1131         if (priv->cfg->ops->lib->dump_fh)
1132                 priv->cfg->ops->lib->dump_fh(priv, NULL, false);
1133         priv->cfg->ops->lib->dump_nic_event_log(priv, false, NULL, false);
1134 #ifdef CONFIG_IWLWIFI_DEBUG
1135         if (iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS)
1136                 iwl_print_rx_config_cmd(priv);
1137 #endif
1138
1139         wake_up_interruptible(&priv->wait_command_queue);
1140
1141         /* Keep the restart process from trying to send host
1142          * commands by clearing the INIT status bit */
1143         clear_bit(STATUS_READY, &priv->status);
1144
1145         if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1146                 IWL_DEBUG(priv, IWL_DL_FW_ERRORS,
1147                           "Restarting adapter due to uCode error.\n");
1148
1149                 if (priv->cfg->mod_params->restart_fw)
1150                         queue_work(priv->workqueue, &priv->restart);
1151         }
1152 }
1153 EXPORT_SYMBOL(iwl_irq_handle_error);
1154
1155 static int iwl_apm_stop_master(struct iwl_priv *priv)
1156 {
1157         int ret = 0;
1158
1159         /* stop device's busmaster DMA activity */
1160         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
1161
1162         ret = iwl_poll_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_MASTER_DISABLED,
1163                         CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
1164         if (ret)
1165                 IWL_WARN(priv, "Master Disable Timed Out, 100 usec\n");
1166
1167         IWL_DEBUG_INFO(priv, "stop master\n");
1168
1169         return ret;
1170 }
1171
1172 void iwl_apm_stop(struct iwl_priv *priv)
1173 {
1174         IWL_DEBUG_INFO(priv, "Stop card, put in low power state\n");
1175
1176         /* Stop device's DMA activity */
1177         iwl_apm_stop_master(priv);
1178
1179         /* Reset the entire device */
1180         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
1181
1182         udelay(10);
1183
1184         /*
1185          * Clear "initialization complete" bit to move adapter from
1186          * D0A* (powered-up Active) --> D0U* (Uninitialized) state.
1187          */
1188         iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1189 }
1190 EXPORT_SYMBOL(iwl_apm_stop);
1191
1192
1193 /*
1194  * Start up NIC's basic functionality after it has been reset
1195  * (e.g. after platform boot, or shutdown via iwl_apm_stop())
1196  * NOTE:  This does not load uCode nor start the embedded processor
1197  */
1198 int iwl_apm_init(struct iwl_priv *priv)
1199 {
1200         int ret = 0;
1201         u16 lctl;
1202
1203         IWL_DEBUG_INFO(priv, "Init card's basic functions\n");
1204
1205         /*
1206          * Use "set_bit" below rather than "write", to preserve any hardware
1207          * bits already set by default after reset.
1208          */
1209
1210         /* Disable L0S exit timer (platform NMI Work/Around) */
1211         iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
1212                           CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
1213
1214         /*
1215          * Disable L0s without affecting L1;
1216          *  don't wait for ICH L0s (ICH bug W/A)
1217          */
1218         iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
1219                           CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
1220
1221         /* Set FH wait threshold to maximum (HW error during stress W/A) */
1222         iwl_set_bit(priv, CSR_DBG_HPET_MEM_REG, CSR_DBG_HPET_MEM_REG_VAL);
1223
1224         /*
1225          * Enable HAP INTA (interrupt from management bus) to
1226          * wake device's PCI Express link L1a -> L0s
1227          * NOTE:  This is no-op for 3945 (non-existant bit)
1228          */
1229         iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1230                                     CSR_HW_IF_CONFIG_REG_BIT_HAP_WAKE_L1A);
1231
1232         /*
1233          * HW bug W/A for instability in PCIe bus L0->L0S->L1 transition.
1234          * Check if BIOS (or OS) enabled L1-ASPM on this device.
1235          * If so (likely), disable L0S, so device moves directly L0->L1;
1236          *    costs negligible amount of power savings.
1237          * If not (unlikely), enable L0S, so there is at least some
1238          *    power savings, even without L1.
1239          */
1240         if (priv->cfg->set_l0s) {
1241                 lctl = iwl_pcie_link_ctl(priv);
1242                 if ((lctl & PCI_CFG_LINK_CTRL_VAL_L1_EN) ==
1243                                         PCI_CFG_LINK_CTRL_VAL_L1_EN) {
1244                         /* L1-ASPM enabled; disable(!) L0S  */
1245                         iwl_set_bit(priv, CSR_GIO_REG,
1246                                         CSR_GIO_REG_VAL_L0S_ENABLED);
1247                         IWL_DEBUG_POWER(priv, "L1 Enabled; Disabling L0S\n");
1248                 } else {
1249                         /* L1-ASPM disabled; enable(!) L0S */
1250                         iwl_clear_bit(priv, CSR_GIO_REG,
1251                                         CSR_GIO_REG_VAL_L0S_ENABLED);
1252                         IWL_DEBUG_POWER(priv, "L1 Disabled; Enabling L0S\n");
1253                 }
1254         }
1255
1256         /* Configure analog phase-lock-loop before activating to D0A */
1257         if (priv->cfg->pll_cfg_val)
1258                 iwl_set_bit(priv, CSR_ANA_PLL_CFG, priv->cfg->pll_cfg_val);
1259
1260         /*
1261          * Set "initialization complete" bit to move adapter from
1262          * D0U* --> D0A* (powered-up active) state.
1263          */
1264         iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1265
1266         /*
1267          * Wait for clock stabilization; once stabilized, access to
1268          * device-internal resources is supported, e.g. iwl_write_prph()
1269          * and accesses to uCode SRAM.
1270          */
1271         ret = iwl_poll_bit(priv, CSR_GP_CNTRL,
1272                         CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
1273                         CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
1274         if (ret < 0) {
1275                 IWL_DEBUG_INFO(priv, "Failed to init the card\n");
1276                 goto out;
1277         }
1278
1279         /*
1280          * Enable DMA and BSM (if used) clocks, wait for them to stabilize.
1281          * BSM (Boostrap State Machine) is only in 3945 and 4965;
1282          * later devices (i.e. 5000 and later) have non-volatile SRAM,
1283          * and don't need BSM to restore data after power-saving sleep.
1284          *
1285          * Write to "CLK_EN_REG"; "1" bits enable clocks, while "0" bits
1286          * do not disable clocks.  This preserves any hardware bits already
1287          * set by default in "CLK_CTRL_REG" after reset.
1288          */
1289         if (priv->cfg->use_bsm)
1290                 iwl_write_prph(priv, APMG_CLK_EN_REG,
1291                         APMG_CLK_VAL_DMA_CLK_RQT | APMG_CLK_VAL_BSM_CLK_RQT);
1292         else
1293                 iwl_write_prph(priv, APMG_CLK_EN_REG,
1294                         APMG_CLK_VAL_DMA_CLK_RQT);
1295         udelay(20);
1296
1297         /* Disable L1-Active */
1298         iwl_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
1299                           APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
1300
1301 out:
1302         return ret;
1303 }
1304 EXPORT_SYMBOL(iwl_apm_init);
1305
1306
1307
1308 void iwl_configure_filter(struct ieee80211_hw *hw,
1309                           unsigned int changed_flags,
1310                           unsigned int *total_flags,
1311                           u64 multicast)
1312 {
1313         struct iwl_priv *priv = hw->priv;
1314         __le32 *filter_flags = &priv->staging_rxon.filter_flags;
1315
1316         IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
1317                         changed_flags, *total_flags);
1318
1319         if (changed_flags & (FIF_OTHER_BSS | FIF_PROMISC_IN_BSS)) {
1320                 if (*total_flags & (FIF_OTHER_BSS | FIF_PROMISC_IN_BSS))
1321                         *filter_flags |= RXON_FILTER_PROMISC_MSK;
1322                 else
1323                         *filter_flags &= ~RXON_FILTER_PROMISC_MSK;
1324         }
1325         if (changed_flags & FIF_ALLMULTI) {
1326                 if (*total_flags & FIF_ALLMULTI)
1327                         *filter_flags |= RXON_FILTER_ACCEPT_GRP_MSK;
1328                 else
1329                         *filter_flags &= ~RXON_FILTER_ACCEPT_GRP_MSK;
1330         }
1331         if (changed_flags & FIF_CONTROL) {
1332                 if (*total_flags & FIF_CONTROL)
1333                         *filter_flags |= RXON_FILTER_CTL2HOST_MSK;
1334                 else
1335                         *filter_flags &= ~RXON_FILTER_CTL2HOST_MSK;
1336         }
1337         if (changed_flags & FIF_BCN_PRBRESP_PROMISC) {
1338                 if (*total_flags & FIF_BCN_PRBRESP_PROMISC)
1339                         *filter_flags |= RXON_FILTER_BCON_AWARE_MSK;
1340                 else
1341                         *filter_flags &= ~RXON_FILTER_BCON_AWARE_MSK;
1342         }
1343
1344         /* We avoid iwl_commit_rxon here to commit the new filter flags
1345          * since mac80211 will call ieee80211_hw_config immediately.
1346          * (mc_list is not supported at this time). Otherwise, we need to
1347          * queue a background iwl_commit_rxon work.
1348          */
1349
1350         *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
1351                         FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
1352 }
1353 EXPORT_SYMBOL(iwl_configure_filter);
1354
1355 int iwl_set_hw_params(struct iwl_priv *priv)
1356 {
1357         priv->hw_params.max_rxq_size = RX_QUEUE_SIZE;
1358         priv->hw_params.max_rxq_log = RX_QUEUE_SIZE_LOG;
1359         if (priv->cfg->mod_params->amsdu_size_8K)
1360                 priv->hw_params.rx_page_order = get_order(IWL_RX_BUF_SIZE_8K);
1361         else
1362                 priv->hw_params.rx_page_order = get_order(IWL_RX_BUF_SIZE_4K);
1363
1364         priv->hw_params.max_beacon_itrvl = IWL_MAX_UCODE_BEACON_INTERVAL;
1365
1366         if (priv->cfg->mod_params->disable_11n)
1367                 priv->cfg->sku &= ~IWL_SKU_N;
1368
1369         /* Device-specific setup */
1370         return priv->cfg->ops->lib->set_hw_params(priv);
1371 }
1372 EXPORT_SYMBOL(iwl_set_hw_params);
1373
1374 int iwl_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force)
1375 {
1376         int ret = 0;
1377         s8 prev_tx_power = priv->tx_power_user_lmt;
1378
1379         if (tx_power < IWLAGN_TX_POWER_TARGET_POWER_MIN) {
1380                 IWL_WARN(priv,
1381                          "Requested user TXPOWER %d below lower limit %d.\n",
1382                          tx_power,
1383                          IWLAGN_TX_POWER_TARGET_POWER_MIN);
1384                 return -EINVAL;
1385         }
1386
1387         if (tx_power > priv->tx_power_device_lmt) {
1388                 IWL_WARN(priv,
1389                         "Requested user TXPOWER %d above upper limit %d.\n",
1390                          tx_power, priv->tx_power_device_lmt);
1391                 return -EINVAL;
1392         }
1393
1394         if (priv->tx_power_user_lmt != tx_power)
1395                 force = true;
1396
1397         /* if nic is not up don't send command */
1398         if (iwl_is_ready_rf(priv)) {
1399                 priv->tx_power_user_lmt = tx_power;
1400                 if (force && priv->cfg->ops->lib->send_tx_power)
1401                         ret = priv->cfg->ops->lib->send_tx_power(priv);
1402                 else if (!priv->cfg->ops->lib->send_tx_power)
1403                         ret = -EOPNOTSUPP;
1404                 /*
1405                  * if fail to set tx_power, restore the orig. tx power
1406                  */
1407                 if (ret)
1408                         priv->tx_power_user_lmt = prev_tx_power;
1409         }
1410
1411         /*
1412          * Even this is an async host command, the command
1413          * will always report success from uCode
1414          * So once driver can placing the command into the queue
1415          * successfully, driver can use priv->tx_power_user_lmt
1416          * to reflect the current tx power
1417          */
1418         return ret;
1419 }
1420 EXPORT_SYMBOL(iwl_set_tx_power);
1421
1422 irqreturn_t iwl_isr_legacy(int irq, void *data)
1423 {
1424         struct iwl_priv *priv = data;
1425         u32 inta, inta_mask;
1426         u32 inta_fh;
1427         unsigned long flags;
1428         if (!priv)
1429                 return IRQ_NONE;
1430
1431         spin_lock_irqsave(&priv->lock, flags);
1432
1433         /* Disable (but don't clear!) interrupts here to avoid
1434          *    back-to-back ISRs and sporadic interrupts from our NIC.
1435          * If we have something to service, the tasklet will re-enable ints.
1436          * If we *don't* have something, we'll re-enable before leaving here. */
1437         inta_mask = iwl_read32(priv, CSR_INT_MASK);  /* just for debug */
1438         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
1439
1440         /* Discover which interrupts are active/pending */
1441         inta = iwl_read32(priv, CSR_INT);
1442         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1443
1444         /* Ignore interrupt if there's nothing in NIC to service.
1445          * This may be due to IRQ shared with another device,
1446          * or due to sporadic interrupts thrown from our NIC. */
1447         if (!inta && !inta_fh) {
1448                 IWL_DEBUG_ISR(priv, "Ignore interrupt, inta == 0, inta_fh == 0\n");
1449                 goto none;
1450         }
1451
1452         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
1453                 /* Hardware disappeared. It might have already raised
1454                  * an interrupt */
1455                 IWL_WARN(priv, "HARDWARE GONE?? INTA == 0x%08x\n", inta);
1456                 goto unplugged;
1457         }
1458
1459         IWL_DEBUG_ISR(priv, "ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1460                       inta, inta_mask, inta_fh);
1461
1462         inta &= ~CSR_INT_BIT_SCD;
1463
1464         /* iwl_irq_tasklet() will service interrupts and re-enable them */
1465         if (likely(inta || inta_fh))
1466                 tasklet_schedule(&priv->irq_tasklet);
1467
1468  unplugged:
1469         spin_unlock_irqrestore(&priv->lock, flags);
1470         return IRQ_HANDLED;
1471
1472  none:
1473         /* re-enable interrupts here since we don't have anything to service. */
1474         /* only Re-enable if diabled by irq */
1475         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1476                 iwl_enable_interrupts(priv);
1477         spin_unlock_irqrestore(&priv->lock, flags);
1478         return IRQ_NONE;
1479 }
1480 EXPORT_SYMBOL(iwl_isr_legacy);
1481
1482 int iwl_send_bt_config(struct iwl_priv *priv)
1483 {
1484         struct iwl_bt_cmd bt_cmd = {
1485                 .lead_time = BT_LEAD_TIME_DEF,
1486                 .max_kill = BT_MAX_KILL_DEF,
1487                 .kill_ack_mask = 0,
1488                 .kill_cts_mask = 0,
1489         };
1490
1491         if (!bt_coex_active)
1492                 bt_cmd.flags = BT_COEX_DISABLE;
1493         else
1494                 bt_cmd.flags = BT_COEX_ENABLE;
1495
1496         IWL_DEBUG_INFO(priv, "BT coex %s\n",
1497                 (bt_cmd.flags == BT_COEX_DISABLE) ? "disable" : "active");
1498
1499         return iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG,
1500                                 sizeof(struct iwl_bt_cmd), &bt_cmd);
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 #define IWL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6)
1871 void iwl_bss_info_changed(struct ieee80211_hw *hw,
1872                           struct ieee80211_vif *vif,
1873                           struct ieee80211_bss_conf *bss_conf,
1874                           u32 changes)
1875 {
1876         struct iwl_priv *priv = hw->priv;
1877         int ret;
1878
1879         IWL_DEBUG_MAC80211(priv, "changes = 0x%X\n", changes);
1880
1881         if (!iwl_is_alive(priv))
1882                 return;
1883
1884         mutex_lock(&priv->mutex);
1885
1886         if (changes & BSS_CHANGED_BEACON &&
1887             priv->iw_mode == NL80211_IFTYPE_AP) {
1888                 dev_kfree_skb(priv->ibss_beacon);
1889                 priv->ibss_beacon = ieee80211_beacon_get(hw, vif);
1890         }
1891
1892         if (changes & BSS_CHANGED_BEACON_INT) {
1893                 priv->beacon_int = bss_conf->beacon_int;
1894                 /* TODO: in AP mode, do something to make this take effect */
1895         }
1896
1897         if (changes & BSS_CHANGED_BSSID) {
1898                 IWL_DEBUG_MAC80211(priv, "BSSID %pM\n", bss_conf->bssid);
1899
1900                 /*
1901                  * If there is currently a HW scan going on in the
1902                  * background then we need to cancel it else the RXON
1903                  * below/in post_associate will fail.
1904                  */
1905                 if (iwl_scan_cancel_timeout(priv, 100)) {
1906                         IWL_WARN(priv, "Aborted scan still in progress after 100ms\n");
1907                         IWL_DEBUG_MAC80211(priv, "leaving - scan abort failed.\n");
1908                         mutex_unlock(&priv->mutex);
1909                         return;
1910                 }
1911
1912                 /* mac80211 only sets assoc when in STATION mode */
1913                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC ||
1914                     bss_conf->assoc) {
1915                         memcpy(priv->staging_rxon.bssid_addr,
1916                                bss_conf->bssid, ETH_ALEN);
1917
1918                         /* currently needed in a few places */
1919                         memcpy(priv->bssid, bss_conf->bssid, ETH_ALEN);
1920                 } else {
1921                         priv->staging_rxon.filter_flags &=
1922                                 ~RXON_FILTER_ASSOC_MSK;
1923                 }
1924
1925         }
1926
1927         /*
1928          * This needs to be after setting the BSSID in case
1929          * mac80211 decides to do both changes at once because
1930          * it will invoke post_associate.
1931          */
1932         if (priv->iw_mode == NL80211_IFTYPE_ADHOC &&
1933             changes & BSS_CHANGED_BEACON) {
1934                 struct sk_buff *beacon = ieee80211_beacon_get(hw, vif);
1935
1936                 if (beacon)
1937                         iwl_mac_beacon_update(hw, beacon);
1938         }
1939
1940         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
1941                 IWL_DEBUG_MAC80211(priv, "ERP_PREAMBLE %d\n",
1942                                    bss_conf->use_short_preamble);
1943                 if (bss_conf->use_short_preamble)
1944                         priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
1945                 else
1946                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
1947         }
1948
1949         if (changes & BSS_CHANGED_ERP_CTS_PROT) {
1950                 IWL_DEBUG_MAC80211(priv, "ERP_CTS %d\n", bss_conf->use_cts_prot);
1951                 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
1952                         priv->staging_rxon.flags |= RXON_FLG_TGG_PROTECT_MSK;
1953                 else
1954                         priv->staging_rxon.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
1955         }
1956
1957         if (changes & BSS_CHANGED_BASIC_RATES) {
1958                 /* XXX use this information
1959                  *
1960                  * To do that, remove code from iwl_set_rate() and put something
1961                  * like this here:
1962                  *
1963                 if (A-band)
1964                         priv->staging_rxon.ofdm_basic_rates =
1965                                 bss_conf->basic_rates;
1966                 else
1967                         priv->staging_rxon.ofdm_basic_rates =
1968                                 bss_conf->basic_rates >> 4;
1969                         priv->staging_rxon.cck_basic_rates =
1970                                 bss_conf->basic_rates & 0xF;
1971                  */
1972         }
1973
1974         if (changes & BSS_CHANGED_HT) {
1975                 iwl_ht_conf(priv, bss_conf);
1976
1977                 if (priv->cfg->ops->hcmd->set_rxon_chain)
1978                         priv->cfg->ops->hcmd->set_rxon_chain(priv);
1979         }
1980
1981         if (changes & BSS_CHANGED_ASSOC) {
1982                 IWL_DEBUG_MAC80211(priv, "ASSOC %d\n", bss_conf->assoc);
1983                 if (bss_conf->assoc) {
1984                         priv->assoc_id = bss_conf->aid;
1985                         priv->beacon_int = bss_conf->beacon_int;
1986                         priv->timestamp = bss_conf->timestamp;
1987                         priv->assoc_capability = bss_conf->assoc_capability;
1988
1989                         iwl_led_associate(priv);
1990
1991                         /*
1992                          * We have just associated, don't start scan too early
1993                          * leave time for EAPOL exchange to complete.
1994                          *
1995                          * XXX: do this in mac80211
1996                          */
1997                         priv->next_scan_jiffies = jiffies +
1998                                         IWL_DELAY_NEXT_SCAN_AFTER_ASSOC;
1999                         if (!iwl_is_rfkill(priv))
2000                                 priv->cfg->ops->lib->post_associate(priv);
2001                 } else
2002                         iwl_set_no_assoc(priv);
2003         }
2004
2005         if (changes && iwl_is_associated(priv) && priv->assoc_id) {
2006                 IWL_DEBUG_MAC80211(priv, "Changes (%#x) while associated\n",
2007                                    changes);
2008                 ret = iwl_send_rxon_assoc(priv);
2009                 if (!ret) {
2010                         /* Sync active_rxon with latest change. */
2011                         memcpy((void *)&priv->active_rxon,
2012                                 &priv->staging_rxon,
2013                                 sizeof(struct iwl_rxon_cmd));
2014                 }
2015         }
2016
2017         if (changes & BSS_CHANGED_BEACON_ENABLED) {
2018                 if (vif->bss_conf.enable_beacon) {
2019                         memcpy(priv->staging_rxon.bssid_addr,
2020                                bss_conf->bssid, ETH_ALEN);
2021                         memcpy(priv->bssid, bss_conf->bssid, ETH_ALEN);
2022                         iwlcore_config_ap(priv);
2023                 } else
2024                         iwl_set_no_assoc(priv);
2025         }
2026
2027         mutex_unlock(&priv->mutex);
2028
2029         IWL_DEBUG_MAC80211(priv, "leave\n");
2030 }
2031 EXPORT_SYMBOL(iwl_bss_info_changed);
2032
2033 int iwl_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb)
2034 {
2035         struct iwl_priv *priv = hw->priv;
2036         unsigned long flags;
2037         __le64 timestamp;
2038
2039         IWL_DEBUG_MAC80211(priv, "enter\n");
2040
2041         if (!iwl_is_ready_rf(priv)) {
2042                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
2043                 return -EIO;
2044         }
2045
2046         spin_lock_irqsave(&priv->lock, flags);
2047
2048         if (priv->ibss_beacon)
2049                 dev_kfree_skb(priv->ibss_beacon);
2050
2051         priv->ibss_beacon = skb;
2052
2053         priv->assoc_id = 0;
2054         timestamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
2055         priv->timestamp = le64_to_cpu(timestamp);
2056
2057         IWL_DEBUG_MAC80211(priv, "leave\n");
2058         spin_unlock_irqrestore(&priv->lock, flags);
2059
2060         priv->cfg->ops->lib->post_associate(priv);
2061
2062         return 0;
2063 }
2064 EXPORT_SYMBOL(iwl_mac_beacon_update);
2065
2066 static int iwl_set_mode(struct iwl_priv *priv, struct ieee80211_vif *vif)
2067 {
2068         iwl_connection_init_rx_config(priv, vif->type);
2069
2070         if (priv->cfg->ops->hcmd->set_rxon_chain)
2071                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
2072
2073         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2074
2075         return iwlcore_commit_rxon(priv);
2076 }
2077
2078 int iwl_mac_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
2079 {
2080         struct iwl_priv *priv = hw->priv;
2081         int err = 0;
2082
2083         IWL_DEBUG_MAC80211(priv, "enter: type %d\n", vif->type);
2084
2085         mutex_lock(&priv->mutex);
2086
2087         if (WARN_ON(!iwl_is_ready_rf(priv))) {
2088                 err = -EINVAL;
2089                 goto out;
2090         }
2091
2092         if (priv->vif) {
2093                 IWL_DEBUG_MAC80211(priv, "leave - vif != NULL\n");
2094                 err = -EOPNOTSUPP;
2095                 goto out;
2096         }
2097
2098         priv->vif = vif;
2099         priv->iw_mode = vif->type;
2100
2101         IWL_DEBUG_MAC80211(priv, "Set %pM\n", vif->addr);
2102         memcpy(priv->mac_addr, vif->addr, ETH_ALEN);
2103
2104         err = iwl_set_mode(priv, vif);
2105         if (err)
2106                 goto out_err;
2107
2108         /* Add the broadcast address so we can send broadcast frames */
2109         priv->cfg->ops->lib->add_bcast_station(priv);
2110
2111         goto out;
2112
2113  out_err:
2114         priv->vif = NULL;
2115         priv->iw_mode = NL80211_IFTYPE_STATION;
2116  out:
2117         mutex_unlock(&priv->mutex);
2118
2119         IWL_DEBUG_MAC80211(priv, "leave\n");
2120         return err;
2121 }
2122 EXPORT_SYMBOL(iwl_mac_add_interface);
2123
2124 void iwl_mac_remove_interface(struct ieee80211_hw *hw,
2125                               struct ieee80211_vif *vif)
2126 {
2127         struct iwl_priv *priv = hw->priv;
2128
2129         IWL_DEBUG_MAC80211(priv, "enter\n");
2130
2131         mutex_lock(&priv->mutex);
2132
2133         iwl_clear_ucode_stations(priv, true);
2134
2135         if (iwl_is_ready_rf(priv)) {
2136                 iwl_scan_cancel_timeout(priv, 100);
2137                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2138                 iwlcore_commit_rxon(priv);
2139         }
2140         if (priv->vif == vif) {
2141                 priv->vif = NULL;
2142                 memset(priv->bssid, 0, ETH_ALEN);
2143         }
2144         mutex_unlock(&priv->mutex);
2145
2146         IWL_DEBUG_MAC80211(priv, "leave\n");
2147
2148 }
2149 EXPORT_SYMBOL(iwl_mac_remove_interface);
2150
2151 /**
2152  * iwl_mac_config - mac80211 config callback
2153  *
2154  * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
2155  * be set inappropriately and the driver currently sets the hardware up to
2156  * use it whenever needed.
2157  */
2158 int iwl_mac_config(struct ieee80211_hw *hw, u32 changed)
2159 {
2160         struct iwl_priv *priv = hw->priv;
2161         const struct iwl_channel_info *ch_info;
2162         struct ieee80211_conf *conf = &hw->conf;
2163         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
2164         unsigned long flags = 0;
2165         int ret = 0;
2166         u16 ch;
2167         int scan_active = 0;
2168
2169         mutex_lock(&priv->mutex);
2170
2171         IWL_DEBUG_MAC80211(priv, "enter to channel %d changed 0x%X\n",
2172                                         conf->channel->hw_value, changed);
2173
2174         if (unlikely(!priv->cfg->mod_params->disable_hw_scan &&
2175                         test_bit(STATUS_SCANNING, &priv->status))) {
2176                 scan_active = 1;
2177                 IWL_DEBUG_MAC80211(priv, "leave - scanning\n");
2178         }
2179
2180         if (changed & (IEEE80211_CONF_CHANGE_SMPS |
2181                        IEEE80211_CONF_CHANGE_CHANNEL)) {
2182                 /* mac80211 uses static for non-HT which is what we want */
2183                 priv->current_ht_config.smps = conf->smps_mode;
2184
2185                 /*
2186                  * Recalculate chain counts.
2187                  *
2188                  * If monitor mode is enabled then mac80211 will
2189                  * set up the SM PS mode to OFF if an HT channel is
2190                  * configured.
2191                  */
2192                 if (priv->cfg->ops->hcmd->set_rxon_chain)
2193                         priv->cfg->ops->hcmd->set_rxon_chain(priv);
2194         }
2195
2196         /* during scanning mac80211 will delay channel setting until
2197          * scan finish with changed = 0
2198          */
2199         if (!changed || (changed & IEEE80211_CONF_CHANGE_CHANNEL)) {
2200                 if (scan_active)
2201                         goto set_ch_out;
2202
2203                 ch = ieee80211_frequency_to_channel(conf->channel->center_freq);
2204                 ch_info = iwl_get_channel_info(priv, conf->channel->band, ch);
2205                 if (!is_channel_valid(ch_info)) {
2206                         IWL_DEBUG_MAC80211(priv, "leave - invalid channel\n");
2207                         ret = -EINVAL;
2208                         goto set_ch_out;
2209                 }
2210
2211                 spin_lock_irqsave(&priv->lock, flags);
2212
2213                 /* Configure HT40 channels */
2214                 ht_conf->is_ht = conf_is_ht(conf);
2215                 if (ht_conf->is_ht) {
2216                         if (conf_is_ht40_minus(conf)) {
2217                                 ht_conf->extension_chan_offset =
2218                                         IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2219                                 ht_conf->is_40mhz = true;
2220                         } else if (conf_is_ht40_plus(conf)) {
2221                                 ht_conf->extension_chan_offset =
2222                                         IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2223                                 ht_conf->is_40mhz = true;
2224                         } else {
2225                                 ht_conf->extension_chan_offset =
2226                                         IEEE80211_HT_PARAM_CHA_SEC_NONE;
2227                                 ht_conf->is_40mhz = false;
2228                         }
2229                 } else
2230                         ht_conf->is_40mhz = false;
2231                 /* Default to no protection. Protection mode will later be set
2232                  * from BSS config in iwl_ht_conf */
2233                 ht_conf->ht_protection = IEEE80211_HT_OP_MODE_PROTECTION_NONE;
2234
2235                 /* if we are switching from ht to 2.4 clear flags
2236                  * from any ht related info since 2.4 does not
2237                  * support ht */
2238                 if ((le16_to_cpu(priv->staging_rxon.channel) != ch))
2239                         priv->staging_rxon.flags = 0;
2240
2241                 iwl_set_rxon_channel(priv, conf->channel);
2242                 iwl_set_rxon_ht(priv, ht_conf);
2243
2244                 iwl_set_flags_for_band(priv, conf->channel->band);
2245                 spin_unlock_irqrestore(&priv->lock, flags);
2246                 if (iwl_is_associated(priv) &&
2247                     (le16_to_cpu(priv->active_rxon.channel) != ch) &&
2248                     priv->cfg->ops->lib->set_channel_switch) {
2249                         iwl_set_rate(priv);
2250                         /*
2251                          * at this point, staging_rxon has the
2252                          * configuration for channel switch
2253                          */
2254                         ret = priv->cfg->ops->lib->set_channel_switch(priv,
2255                                 ch);
2256                         if (!ret) {
2257                                 iwl_print_rx_config_cmd(priv);
2258                                 goto out;
2259                         }
2260                         priv->switch_rxon.switch_in_progress = false;
2261                 }
2262  set_ch_out:
2263                 /* The list of supported rates and rate mask can be different
2264                  * for each band; since the band may have changed, reset
2265                  * the rate mask to what mac80211 lists */
2266                 iwl_set_rate(priv);
2267         }
2268
2269         if (changed & (IEEE80211_CONF_CHANGE_PS |
2270                         IEEE80211_CONF_CHANGE_IDLE)) {
2271                 ret = iwl_power_update_mode(priv, false);
2272                 if (ret)
2273                         IWL_DEBUG_MAC80211(priv, "Error setting sleep level\n");
2274         }
2275
2276         if (changed & IEEE80211_CONF_CHANGE_POWER) {
2277                 IWL_DEBUG_MAC80211(priv, "TX Power old=%d new=%d\n",
2278                         priv->tx_power_user_lmt, conf->power_level);
2279
2280                 iwl_set_tx_power(priv, conf->power_level, false);
2281         }
2282
2283         if (changed & IEEE80211_CONF_CHANGE_QOS) {
2284                 bool qos_active = !!(conf->flags & IEEE80211_CONF_QOS);
2285
2286                 spin_lock_irqsave(&priv->lock, flags);
2287                 priv->qos_data.qos_active = qos_active;
2288                 iwl_update_qos(priv);
2289                 spin_unlock_irqrestore(&priv->lock, flags);
2290         }
2291
2292         if (!iwl_is_ready(priv)) {
2293                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2294                 goto out;
2295         }
2296
2297         if (scan_active)
2298                 goto out;
2299
2300         if (memcmp(&priv->active_rxon,
2301                    &priv->staging_rxon, sizeof(priv->staging_rxon)))
2302                 iwlcore_commit_rxon(priv);
2303         else
2304                 IWL_DEBUG_INFO(priv, "Not re-sending same RXON configuration.\n");
2305
2306
2307 out:
2308         IWL_DEBUG_MAC80211(priv, "leave\n");
2309         mutex_unlock(&priv->mutex);
2310         return ret;
2311 }
2312 EXPORT_SYMBOL(iwl_mac_config);
2313
2314 void iwl_mac_reset_tsf(struct ieee80211_hw *hw)
2315 {
2316         struct iwl_priv *priv = hw->priv;
2317         unsigned long flags;
2318
2319         mutex_lock(&priv->mutex);
2320         IWL_DEBUG_MAC80211(priv, "enter\n");
2321
2322         spin_lock_irqsave(&priv->lock, flags);
2323         memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_config));
2324         spin_unlock_irqrestore(&priv->lock, flags);
2325
2326         spin_lock_irqsave(&priv->lock, flags);
2327         priv->assoc_id = 0;
2328         priv->assoc_capability = 0;
2329
2330         /* new association get rid of ibss beacon skb */
2331         if (priv->ibss_beacon)
2332                 dev_kfree_skb(priv->ibss_beacon);
2333
2334         priv->ibss_beacon = NULL;
2335
2336         priv->beacon_int = priv->vif->bss_conf.beacon_int;
2337         priv->timestamp = 0;
2338
2339         spin_unlock_irqrestore(&priv->lock, flags);
2340
2341         if (!iwl_is_ready_rf(priv)) {
2342                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2343                 mutex_unlock(&priv->mutex);
2344                 return;
2345         }
2346
2347         /* we are restarting association process
2348          * clear RXON_FILTER_ASSOC_MSK bit
2349          */
2350         iwl_scan_cancel_timeout(priv, 100);
2351         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2352         iwlcore_commit_rxon(priv);
2353
2354         iwl_set_rate(priv);
2355
2356         mutex_unlock(&priv->mutex);
2357
2358         IWL_DEBUG_MAC80211(priv, "leave\n");
2359 }
2360 EXPORT_SYMBOL(iwl_mac_reset_tsf);
2361
2362 int iwl_alloc_txq_mem(struct iwl_priv *priv)
2363 {
2364         if (!priv->txq)
2365                 priv->txq = kzalloc(
2366                         sizeof(struct iwl_tx_queue) * priv->cfg->num_of_queues,
2367                         GFP_KERNEL);
2368         if (!priv->txq) {
2369                 IWL_ERR(priv, "Not enough memory for txq\n");
2370                 return -ENOMEM;
2371         }
2372         return 0;
2373 }
2374 EXPORT_SYMBOL(iwl_alloc_txq_mem);
2375
2376 void iwl_free_txq_mem(struct iwl_priv *priv)
2377 {
2378         kfree(priv->txq);
2379         priv->txq = NULL;
2380 }
2381 EXPORT_SYMBOL(iwl_free_txq_mem);
2382
2383 int iwl_send_wimax_coex(struct iwl_priv *priv)
2384 {
2385         struct iwl_wimax_coex_cmd uninitialized_var(coex_cmd);
2386
2387         if (priv->cfg->support_wimax_coexist) {
2388                 /* UnMask wake up src at associated sleep */
2389                 coex_cmd.flags |= COEX_FLAGS_ASSOC_WA_UNMASK_MSK;
2390
2391                 /* UnMask wake up src at unassociated sleep */
2392                 coex_cmd.flags |= COEX_FLAGS_UNASSOC_WA_UNMASK_MSK;
2393                 memcpy(coex_cmd.sta_prio, cu_priorities,
2394                         sizeof(struct iwl_wimax_coex_event_entry) *
2395                          COEX_NUM_OF_EVENTS);
2396
2397                 /* enabling the coexistence feature */
2398                 coex_cmd.flags |= COEX_FLAGS_COEX_ENABLE_MSK;
2399
2400                 /* enabling the priorities tables */
2401                 coex_cmd.flags |= COEX_FLAGS_STA_TABLE_VALID_MSK;
2402         } else {
2403                 /* coexistence is disabled */
2404                 memset(&coex_cmd, 0, sizeof(coex_cmd));
2405         }
2406         return iwl_send_cmd_pdu(priv, COEX_PRIORITY_TABLE_CMD,
2407                                 sizeof(coex_cmd), &coex_cmd);
2408 }
2409 EXPORT_SYMBOL(iwl_send_wimax_coex);
2410
2411 #ifdef CONFIG_IWLWIFI_DEBUGFS
2412
2413 #define IWL_TRAFFIC_DUMP_SIZE   (IWL_TRAFFIC_ENTRY_SIZE * IWL_TRAFFIC_ENTRIES)
2414
2415 void iwl_reset_traffic_log(struct iwl_priv *priv)
2416 {
2417         priv->tx_traffic_idx = 0;
2418         priv->rx_traffic_idx = 0;
2419         if (priv->tx_traffic)
2420                 memset(priv->tx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
2421         if (priv->rx_traffic)
2422                 memset(priv->rx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
2423 }
2424
2425 int iwl_alloc_traffic_mem(struct iwl_priv *priv)
2426 {
2427         u32 traffic_size = IWL_TRAFFIC_DUMP_SIZE;
2428
2429         if (iwl_debug_level & IWL_DL_TX) {
2430                 if (!priv->tx_traffic) {
2431                         priv->tx_traffic =
2432                                 kzalloc(traffic_size, GFP_KERNEL);
2433                         if (!priv->tx_traffic)
2434                                 return -ENOMEM;
2435                 }
2436         }
2437         if (iwl_debug_level & IWL_DL_RX) {
2438                 if (!priv->rx_traffic) {
2439                         priv->rx_traffic =
2440                                 kzalloc(traffic_size, GFP_KERNEL);
2441                         if (!priv->rx_traffic)
2442                                 return -ENOMEM;
2443                 }
2444         }
2445         iwl_reset_traffic_log(priv);
2446         return 0;
2447 }
2448 EXPORT_SYMBOL(iwl_alloc_traffic_mem);
2449
2450 void iwl_free_traffic_mem(struct iwl_priv *priv)
2451 {
2452         kfree(priv->tx_traffic);
2453         priv->tx_traffic = NULL;
2454
2455         kfree(priv->rx_traffic);
2456         priv->rx_traffic = NULL;
2457 }
2458 EXPORT_SYMBOL(iwl_free_traffic_mem);
2459
2460 void iwl_dbg_log_tx_data_frame(struct iwl_priv *priv,
2461                       u16 length, struct ieee80211_hdr *header)
2462 {
2463         __le16 fc;
2464         u16 len;
2465
2466         if (likely(!(iwl_debug_level & IWL_DL_TX)))
2467                 return;
2468
2469         if (!priv->tx_traffic)
2470                 return;
2471
2472         fc = header->frame_control;
2473         if (ieee80211_is_data(fc)) {
2474                 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
2475                        ? IWL_TRAFFIC_ENTRY_SIZE : length;
2476                 memcpy((priv->tx_traffic +
2477                        (priv->tx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
2478                        header, len);
2479                 priv->tx_traffic_idx =
2480                         (priv->tx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
2481         }
2482 }
2483 EXPORT_SYMBOL(iwl_dbg_log_tx_data_frame);
2484
2485 void iwl_dbg_log_rx_data_frame(struct iwl_priv *priv,
2486                       u16 length, struct ieee80211_hdr *header)
2487 {
2488         __le16 fc;
2489         u16 len;
2490
2491         if (likely(!(iwl_debug_level & IWL_DL_RX)))
2492                 return;
2493
2494         if (!priv->rx_traffic)
2495                 return;
2496
2497         fc = header->frame_control;
2498         if (ieee80211_is_data(fc)) {
2499                 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
2500                        ? IWL_TRAFFIC_ENTRY_SIZE : length;
2501                 memcpy((priv->rx_traffic +
2502                        (priv->rx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
2503                        header, len);
2504                 priv->rx_traffic_idx =
2505                         (priv->rx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
2506         }
2507 }
2508 EXPORT_SYMBOL(iwl_dbg_log_rx_data_frame);
2509
2510 const char *get_mgmt_string(int cmd)
2511 {
2512         switch (cmd) {
2513                 IWL_CMD(MANAGEMENT_ASSOC_REQ);
2514                 IWL_CMD(MANAGEMENT_ASSOC_RESP);
2515                 IWL_CMD(MANAGEMENT_REASSOC_REQ);
2516                 IWL_CMD(MANAGEMENT_REASSOC_RESP);
2517                 IWL_CMD(MANAGEMENT_PROBE_REQ);
2518                 IWL_CMD(MANAGEMENT_PROBE_RESP);
2519                 IWL_CMD(MANAGEMENT_BEACON);
2520                 IWL_CMD(MANAGEMENT_ATIM);
2521                 IWL_CMD(MANAGEMENT_DISASSOC);
2522                 IWL_CMD(MANAGEMENT_AUTH);
2523                 IWL_CMD(MANAGEMENT_DEAUTH);
2524                 IWL_CMD(MANAGEMENT_ACTION);
2525         default:
2526                 return "UNKNOWN";
2527
2528         }
2529 }
2530
2531 const char *get_ctrl_string(int cmd)
2532 {
2533         switch (cmd) {
2534                 IWL_CMD(CONTROL_BACK_REQ);
2535                 IWL_CMD(CONTROL_BACK);
2536                 IWL_CMD(CONTROL_PSPOLL);
2537                 IWL_CMD(CONTROL_RTS);
2538                 IWL_CMD(CONTROL_CTS);
2539                 IWL_CMD(CONTROL_ACK);
2540                 IWL_CMD(CONTROL_CFEND);
2541                 IWL_CMD(CONTROL_CFENDACK);
2542         default:
2543                 return "UNKNOWN";
2544
2545         }
2546 }
2547
2548 void iwl_clear_traffic_stats(struct iwl_priv *priv)
2549 {
2550         memset(&priv->tx_stats, 0, sizeof(struct traffic_stats));
2551         memset(&priv->rx_stats, 0, sizeof(struct traffic_stats));
2552         priv->led_tpt = 0;
2553 }
2554
2555 /*
2556  * if CONFIG_IWLWIFI_DEBUGFS defined, iwl_update_stats function will
2557  * record all the MGMT, CTRL and DATA pkt for both TX and Rx pass.
2558  * Use debugFs to display the rx/rx_statistics
2559  * if CONFIG_IWLWIFI_DEBUGFS not being defined, then no MGMT and CTRL
2560  * information will be recorded, but DATA pkt still will be recorded
2561  * for the reason of iwl_led.c need to control the led blinking based on
2562  * number of tx and rx data.
2563  *
2564  */
2565 void iwl_update_stats(struct iwl_priv *priv, bool is_tx, __le16 fc, u16 len)
2566 {
2567         struct traffic_stats    *stats;
2568
2569         if (is_tx)
2570                 stats = &priv->tx_stats;
2571         else
2572                 stats = &priv->rx_stats;
2573
2574         if (ieee80211_is_mgmt(fc)) {
2575                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
2576                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
2577                         stats->mgmt[MANAGEMENT_ASSOC_REQ]++;
2578                         break;
2579                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP):
2580                         stats->mgmt[MANAGEMENT_ASSOC_RESP]++;
2581                         break;
2582                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
2583                         stats->mgmt[MANAGEMENT_REASSOC_REQ]++;
2584                         break;
2585                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP):
2586                         stats->mgmt[MANAGEMENT_REASSOC_RESP]++;
2587                         break;
2588                 case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ):
2589                         stats->mgmt[MANAGEMENT_PROBE_REQ]++;
2590                         break;
2591                 case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP):
2592                         stats->mgmt[MANAGEMENT_PROBE_RESP]++;
2593                         break;
2594                 case cpu_to_le16(IEEE80211_STYPE_BEACON):
2595                         stats->mgmt[MANAGEMENT_BEACON]++;
2596                         break;
2597                 case cpu_to_le16(IEEE80211_STYPE_ATIM):
2598                         stats->mgmt[MANAGEMENT_ATIM]++;
2599                         break;
2600                 case cpu_to_le16(IEEE80211_STYPE_DISASSOC):
2601                         stats->mgmt[MANAGEMENT_DISASSOC]++;
2602                         break;
2603                 case cpu_to_le16(IEEE80211_STYPE_AUTH):
2604                         stats->mgmt[MANAGEMENT_AUTH]++;
2605                         break;
2606                 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
2607                         stats->mgmt[MANAGEMENT_DEAUTH]++;
2608                         break;
2609                 case cpu_to_le16(IEEE80211_STYPE_ACTION):
2610                         stats->mgmt[MANAGEMENT_ACTION]++;
2611                         break;
2612                 }
2613         } else if (ieee80211_is_ctl(fc)) {
2614                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
2615                 case cpu_to_le16(IEEE80211_STYPE_BACK_REQ):
2616                         stats->ctrl[CONTROL_BACK_REQ]++;
2617                         break;
2618                 case cpu_to_le16(IEEE80211_STYPE_BACK):
2619                         stats->ctrl[CONTROL_BACK]++;
2620                         break;
2621                 case cpu_to_le16(IEEE80211_STYPE_PSPOLL):
2622                         stats->ctrl[CONTROL_PSPOLL]++;
2623                         break;
2624                 case cpu_to_le16(IEEE80211_STYPE_RTS):
2625                         stats->ctrl[CONTROL_RTS]++;
2626                         break;
2627                 case cpu_to_le16(IEEE80211_STYPE_CTS):
2628                         stats->ctrl[CONTROL_CTS]++;
2629                         break;
2630                 case cpu_to_le16(IEEE80211_STYPE_ACK):
2631                         stats->ctrl[CONTROL_ACK]++;
2632                         break;
2633                 case cpu_to_le16(IEEE80211_STYPE_CFEND):
2634                         stats->ctrl[CONTROL_CFEND]++;
2635                         break;
2636                 case cpu_to_le16(IEEE80211_STYPE_CFENDACK):
2637                         stats->ctrl[CONTROL_CFENDACK]++;
2638                         break;
2639                 }
2640         } else {
2641                 /* data */
2642                 stats->data_cnt++;
2643                 stats->data_bytes += len;
2644         }
2645         iwl_leds_background(priv);
2646 }
2647 EXPORT_SYMBOL(iwl_update_stats);
2648 #endif
2649
2650 const static char *get_csr_string(int cmd)
2651 {
2652         switch (cmd) {
2653                 IWL_CMD(CSR_HW_IF_CONFIG_REG);
2654                 IWL_CMD(CSR_INT_COALESCING);
2655                 IWL_CMD(CSR_INT);
2656                 IWL_CMD(CSR_INT_MASK);
2657                 IWL_CMD(CSR_FH_INT_STATUS);
2658                 IWL_CMD(CSR_GPIO_IN);
2659                 IWL_CMD(CSR_RESET);
2660                 IWL_CMD(CSR_GP_CNTRL);
2661                 IWL_CMD(CSR_HW_REV);
2662                 IWL_CMD(CSR_EEPROM_REG);
2663                 IWL_CMD(CSR_EEPROM_GP);
2664                 IWL_CMD(CSR_OTP_GP_REG);
2665                 IWL_CMD(CSR_GIO_REG);
2666                 IWL_CMD(CSR_GP_UCODE_REG);
2667                 IWL_CMD(CSR_GP_DRIVER_REG);
2668                 IWL_CMD(CSR_UCODE_DRV_GP1);
2669                 IWL_CMD(CSR_UCODE_DRV_GP2);
2670                 IWL_CMD(CSR_LED_REG);
2671                 IWL_CMD(CSR_DRAM_INT_TBL_REG);
2672                 IWL_CMD(CSR_GIO_CHICKEN_BITS);
2673                 IWL_CMD(CSR_ANA_PLL_CFG);
2674                 IWL_CMD(CSR_HW_REV_WA_REG);
2675                 IWL_CMD(CSR_DBG_HPET_MEM_REG);
2676         default:
2677                 return "UNKNOWN";
2678
2679         }
2680 }
2681
2682 void iwl_dump_csr(struct iwl_priv *priv)
2683 {
2684         int i;
2685         u32 csr_tbl[] = {
2686                 CSR_HW_IF_CONFIG_REG,
2687                 CSR_INT_COALESCING,
2688                 CSR_INT,
2689                 CSR_INT_MASK,
2690                 CSR_FH_INT_STATUS,
2691                 CSR_GPIO_IN,
2692                 CSR_RESET,
2693                 CSR_GP_CNTRL,
2694                 CSR_HW_REV,
2695                 CSR_EEPROM_REG,
2696                 CSR_EEPROM_GP,
2697                 CSR_OTP_GP_REG,
2698                 CSR_GIO_REG,
2699                 CSR_GP_UCODE_REG,
2700                 CSR_GP_DRIVER_REG,
2701                 CSR_UCODE_DRV_GP1,
2702                 CSR_UCODE_DRV_GP2,
2703                 CSR_LED_REG,
2704                 CSR_DRAM_INT_TBL_REG,
2705                 CSR_GIO_CHICKEN_BITS,
2706                 CSR_ANA_PLL_CFG,
2707                 CSR_HW_REV_WA_REG,
2708                 CSR_DBG_HPET_MEM_REG
2709         };
2710         IWL_ERR(priv, "CSR values:\n");
2711         IWL_ERR(priv, "(2nd byte of CSR_INT_COALESCING is "
2712                 "CSR_INT_PERIODIC_REG)\n");
2713         for (i = 0; i <  ARRAY_SIZE(csr_tbl); i++) {
2714                 IWL_ERR(priv, "  %25s: 0X%08x\n",
2715                         get_csr_string(csr_tbl[i]),
2716                         iwl_read32(priv, csr_tbl[i]));
2717         }
2718 }
2719 EXPORT_SYMBOL(iwl_dump_csr);
2720
2721 const static char *get_fh_string(int cmd)
2722 {
2723         switch (cmd) {
2724                 IWL_CMD(FH_RSCSR_CHNL0_STTS_WPTR_REG);
2725                 IWL_CMD(FH_RSCSR_CHNL0_RBDCB_BASE_REG);
2726                 IWL_CMD(FH_RSCSR_CHNL0_WPTR);
2727                 IWL_CMD(FH_MEM_RCSR_CHNL0_CONFIG_REG);
2728                 IWL_CMD(FH_MEM_RSSR_SHARED_CTRL_REG);
2729                 IWL_CMD(FH_MEM_RSSR_RX_STATUS_REG);
2730                 IWL_CMD(FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV);
2731                 IWL_CMD(FH_TSSR_TX_STATUS_REG);
2732                 IWL_CMD(FH_TSSR_TX_ERROR_REG);
2733         default:
2734                 return "UNKNOWN";
2735
2736         }
2737 }
2738
2739 int iwl_dump_fh(struct iwl_priv *priv, char **buf, bool display)
2740 {
2741         int i;
2742 #ifdef CONFIG_IWLWIFI_DEBUG
2743         int pos = 0;
2744         size_t bufsz = 0;
2745 #endif
2746         u32 fh_tbl[] = {
2747                 FH_RSCSR_CHNL0_STTS_WPTR_REG,
2748                 FH_RSCSR_CHNL0_RBDCB_BASE_REG,
2749                 FH_RSCSR_CHNL0_WPTR,
2750                 FH_MEM_RCSR_CHNL0_CONFIG_REG,
2751                 FH_MEM_RSSR_SHARED_CTRL_REG,
2752                 FH_MEM_RSSR_RX_STATUS_REG,
2753                 FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV,
2754                 FH_TSSR_TX_STATUS_REG,
2755                 FH_TSSR_TX_ERROR_REG
2756         };
2757 #ifdef CONFIG_IWLWIFI_DEBUG
2758         if (display) {
2759                 bufsz = ARRAY_SIZE(fh_tbl) * 48 + 40;
2760                 *buf = kmalloc(bufsz, GFP_KERNEL);
2761                 if (!*buf)
2762                         return -ENOMEM;
2763                 pos += scnprintf(*buf + pos, bufsz - pos,
2764                                 "FH register values:\n");
2765                 for (i = 0; i < ARRAY_SIZE(fh_tbl); i++) {
2766                         pos += scnprintf(*buf + pos, bufsz - pos,
2767                                 "  %34s: 0X%08x\n",
2768                                 get_fh_string(fh_tbl[i]),
2769                                 iwl_read_direct32(priv, fh_tbl[i]));
2770                 }
2771                 return pos;
2772         }
2773 #endif
2774         IWL_ERR(priv, "FH register values:\n");
2775         for (i = 0; i <  ARRAY_SIZE(fh_tbl); i++) {
2776                 IWL_ERR(priv, "  %34s: 0X%08x\n",
2777                         get_fh_string(fh_tbl[i]),
2778                         iwl_read_direct32(priv, fh_tbl[i]));
2779         }
2780         return 0;
2781 }
2782 EXPORT_SYMBOL(iwl_dump_fh);
2783
2784 static void iwl_force_rf_reset(struct iwl_priv *priv)
2785 {
2786         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2787                 return;
2788
2789         if (!iwl_is_associated(priv)) {
2790                 IWL_DEBUG_SCAN(priv, "force reset rejected: not associated\n");
2791                 return;
2792         }
2793         /*
2794          * There is no easy and better way to force reset the radio,
2795          * the only known method is switching channel which will force to
2796          * reset and tune the radio.
2797          * Use internal short scan (single channel) operation to should
2798          * achieve this objective.
2799          * Driver should reset the radio when number of consecutive missed
2800          * beacon, or any other uCode error condition detected.
2801          */
2802         IWL_DEBUG_INFO(priv, "perform radio reset.\n");
2803         iwl_internal_short_hw_scan(priv);
2804         return;
2805 }
2806
2807
2808 int iwl_force_reset(struct iwl_priv *priv, int mode)
2809 {
2810         struct iwl_force_reset *force_reset;
2811
2812         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2813                 return -EINVAL;
2814
2815         if (mode >= IWL_MAX_FORCE_RESET) {
2816                 IWL_DEBUG_INFO(priv, "invalid reset request.\n");
2817                 return -EINVAL;
2818         }
2819         force_reset = &priv->force_reset[mode];
2820         force_reset->reset_request_count++;
2821         if (force_reset->last_force_reset_jiffies &&
2822             time_after(force_reset->last_force_reset_jiffies +
2823             force_reset->reset_duration, jiffies)) {
2824                 IWL_DEBUG_INFO(priv, "force reset rejected\n");
2825                 force_reset->reset_reject_count++;
2826                 return -EAGAIN;
2827         }
2828         force_reset->reset_success_count++;
2829         force_reset->last_force_reset_jiffies = jiffies;
2830         IWL_DEBUG_INFO(priv, "perform force reset (%d)\n", mode);
2831         switch (mode) {
2832         case IWL_RF_RESET:
2833                 iwl_force_rf_reset(priv);
2834                 break;
2835         case IWL_FW_RESET:
2836                 IWL_ERR(priv, "On demand firmware reload\n");
2837                 /* Set the FW error flag -- cleared on iwl_down */
2838                 set_bit(STATUS_FW_ERROR, &priv->status);
2839                 wake_up_interruptible(&priv->wait_command_queue);
2840                 /*
2841                  * Keep the restart process from trying to send host
2842                  * commands by clearing the INIT status bit
2843                  */
2844                 clear_bit(STATUS_READY, &priv->status);
2845                 queue_work(priv->workqueue, &priv->restart);
2846                 break;
2847         }
2848         return 0;
2849 }
2850 EXPORT_SYMBOL(iwl_force_reset);
2851
2852 /**
2853  * iwl_bg_monitor_recover - Timer callback to check for stuck queue and recover
2854  *
2855  * During normal condition (no queue is stuck), the timer is continually set to
2856  * execute every monitor_recover_period milliseconds after the last timer
2857  * expired.  When the queue read_ptr is at the same place, the timer is
2858  * shorten to 100mSecs.  This is
2859  *      1) to reduce the chance that the read_ptr may wrap around (not stuck)
2860  *      2) to detect the stuck queues quicker before the station and AP can
2861  *      disassociate each other.
2862  *
2863  * This function monitors all the tx queues and recover from it if any
2864  * of the queues are stuck.
2865  * 1. It first check the cmd queue for stuck conditions.  If it is stuck,
2866  *      it will recover by resetting the firmware and return.
2867  * 2. Then, it checks for station association.  If it associates it will check
2868  *      other queues.  If any queue is stuck, it will recover by resetting
2869  *      the firmware.
2870  * Note: It the number of times the queue read_ptr to be at the same place to
2871  *      be MAX_REPEAT+1 in order to consider to be stuck.
2872  */
2873 /*
2874  * The maximum number of times the read pointer of the tx queue at the
2875  * same place without considering to be stuck.
2876  */
2877 #define MAX_REPEAT      (2)
2878 static int iwl_check_stuck_queue(struct iwl_priv *priv, int cnt)
2879 {
2880         struct iwl_tx_queue *txq;
2881         struct iwl_queue *q;
2882
2883         txq = &priv->txq[cnt];
2884         q = &txq->q;
2885         /* queue is empty, skip */
2886         if (q->read_ptr != q->write_ptr) {
2887                 if (q->read_ptr == q->last_read_ptr) {
2888                         /* a queue has not been read from last time */
2889                         if (q->repeat_same_read_ptr > MAX_REPEAT) {
2890                                 IWL_ERR(priv,
2891                                         "queue %d stuck %d time. Fw reload.\n",
2892                                         q->id, q->repeat_same_read_ptr);
2893                                 q->repeat_same_read_ptr = 0;
2894                                 iwl_force_reset(priv, IWL_FW_RESET);
2895                         } else {
2896                                 q->repeat_same_read_ptr++;
2897                                 IWL_DEBUG_RADIO(priv,
2898                                                 "queue %d, not read %d time\n",
2899                                                 q->id,
2900                                                 q->repeat_same_read_ptr);
2901                                 mod_timer(&priv->monitor_recover, jiffies +
2902                                         msecs_to_jiffies(IWL_ONE_HUNDRED_MSECS));
2903                         }
2904                         return 1;
2905                 } else {
2906                         q->last_read_ptr = q->read_ptr;
2907                         q->repeat_same_read_ptr = 0;
2908                 }
2909         }
2910         return 0;
2911 }
2912
2913 void iwl_bg_monitor_recover(unsigned long data)
2914 {
2915         struct iwl_priv *priv = (struct iwl_priv *)data;
2916         int cnt;
2917
2918         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2919                 return;
2920
2921         /* monitor and check for stuck cmd queue */
2922         if (iwl_check_stuck_queue(priv, IWL_CMD_QUEUE_NUM))
2923                 return;
2924
2925         /* monitor and check for other stuck queues */
2926         if (iwl_is_associated(priv)) {
2927                 for (cnt = 0; cnt < priv->hw_params.max_txq_num; cnt++) {
2928                         /* skip as we already checked the command queue */
2929                         if (cnt == IWL_CMD_QUEUE_NUM)
2930                                 continue;
2931                         if (iwl_check_stuck_queue(priv, cnt))
2932                                 return;
2933                 }
2934         }
2935         /*
2936          * Reschedule the timer to occur in
2937          * priv->cfg->monitor_recover_period
2938          */
2939         mod_timer(&priv->monitor_recover,
2940                 jiffies + msecs_to_jiffies(priv->cfg->monitor_recover_period));
2941 }
2942 EXPORT_SYMBOL(iwl_bg_monitor_recover);
2943
2944 #ifdef CONFIG_PM
2945
2946 int iwl_pci_suspend(struct pci_dev *pdev, pm_message_t state)
2947 {
2948         struct iwl_priv *priv = pci_get_drvdata(pdev);
2949
2950         /*
2951          * This function is called when system goes into suspend state
2952          * mac80211 will call iwl_mac_stop() from the mac80211 suspend function
2953          * first but since iwl_mac_stop() has no knowledge of who the caller is,
2954          * it will not call apm_ops.stop() to stop the DMA operation.
2955          * Calling apm_ops.stop here to make sure we stop the DMA.
2956          */
2957         priv->cfg->ops->lib->apm_ops.stop(priv);
2958
2959         pci_save_state(pdev);
2960         pci_disable_device(pdev);
2961         pci_set_power_state(pdev, PCI_D3hot);
2962
2963         return 0;
2964 }
2965 EXPORT_SYMBOL(iwl_pci_suspend);
2966
2967 int iwl_pci_resume(struct pci_dev *pdev)
2968 {
2969         struct iwl_priv *priv = pci_get_drvdata(pdev);
2970         int ret;
2971
2972         pci_set_power_state(pdev, PCI_D0);
2973         ret = pci_enable_device(pdev);
2974         if (ret)
2975                 return ret;
2976         pci_restore_state(pdev);
2977         iwl_enable_interrupts(priv);
2978
2979         return 0;
2980 }
2981 EXPORT_SYMBOL(iwl_pci_resume);
2982
2983 #endif /* CONFIG_PM */