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

   1 /******************************************************************************
   2  *
   3  * GPL LICENSE SUMMARY
   4  *
   5  * Copyright(c) 2008 - 2009 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 <net/mac80211.h>
  33
  34 #include "iwl-eeprom.h"
  35 #include "iwl-dev.h" /* FIXME: remove */
  36 #include "iwl-debug.h"
  37 #include "iwl-core.h"
  38 #include "iwl-io.h"
  39 #include "iwl-rfkill.h"
  40 #include "iwl-power.h"
  41 #include "iwl-sta.h"
  42
  43
  44 MODULE_DESCRIPTION("iwl core");
  45 MODULE_VERSION(IWLWIFI_VERSION);
  46 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
  47 MODULE_LICENSE("GPL");
  48
  49 #define IWL_DECLARE_RATE_INFO(r, s, ip, in, rp, rn, pp, np)    \
  50         [IWL_RATE_##r##M_INDEX] = { IWL_RATE_##r##M_PLCP,      \
  51                                     IWL_RATE_SISO_##s##M_PLCP, \
  52                                     IWL_RATE_MIMO2_##s##M_PLCP,\
  53                                     IWL_RATE_MIMO3_##s##M_PLCP,\
  54                                     IWL_RATE_##r##M_IEEE,      \
  55                                     IWL_RATE_##ip##M_INDEX,    \
  56                                     IWL_RATE_##in##M_INDEX,    \
  57                                     IWL_RATE_##rp##M_INDEX,    \
  58                                     IWL_RATE_##rn##M_INDEX,    \
  59                                     IWL_RATE_##pp##M_INDEX,    \
  60                                     IWL_RATE_##np##M_INDEX }
  61
  62 /*
  63  * Parameter order:
  64  *   rate, ht rate, prev rate, next rate, prev tgg rate, next tgg rate
  65  *
  66  * If there isn't a valid next or previous rate then INV is used which
  67  * maps to IWL_RATE_INVALID
  68  *
  69  */
  70 const struct iwl_rate_info iwl_rates[IWL_RATE_COUNT] = {
  71         IWL_DECLARE_RATE_INFO(1, INV, INV, 2, INV, 2, INV, 2),    /*  1mbps */
  72         IWL_DECLARE_RATE_INFO(2, INV, 1, 5, 1, 5, 1, 5),          /*  2mbps */
  73         IWL_DECLARE_RATE_INFO(5, INV, 2, 6, 2, 11, 2, 11),        /*5.5mbps */
  74         IWL_DECLARE_RATE_INFO(11, INV, 9, 12, 9, 12, 5, 18),      /* 11mbps */
  75         IWL_DECLARE_RATE_INFO(6, 6, 5, 9, 5, 11, 5, 11),        /*  6mbps */
  76         IWL_DECLARE_RATE_INFO(9, 6, 6, 11, 6, 11, 5, 11),       /*  9mbps */
  77         IWL_DECLARE_RATE_INFO(12, 12, 11, 18, 11, 18, 11, 18),   /* 12mbps */
  78         IWL_DECLARE_RATE_INFO(18, 18, 12, 24, 12, 24, 11, 24),   /* 18mbps */
  79         IWL_DECLARE_RATE_INFO(24, 24, 18, 36, 18, 36, 18, 36),   /* 24mbps */
  80         IWL_DECLARE_RATE_INFO(36, 36, 24, 48, 24, 48, 24, 48),   /* 36mbps */
  81         IWL_DECLARE_RATE_INFO(48, 48, 36, 54, 36, 54, 36, 54),   /* 48mbps */
  82         IWL_DECLARE_RATE_INFO(54, 54, 48, INV, 48, INV, 48, INV),/* 54mbps */
  83         IWL_DECLARE_RATE_INFO(60, 60, 48, INV, 48, INV, 48, INV),/* 60mbps */
  84         /* FIXME:RS:          ^^    should be INV (legacy) */
  85 };
  86 EXPORT_SYMBOL(iwl_rates);
  87
  88 /**
  89  * translate ucode response to mac80211 tx status control values
  90  */
  91 void iwl_hwrate_to_tx_control(struct iwl_priv *priv, u32 rate_n_flags,
  92                                   struct ieee80211_tx_info *info)
  93 {
  94         int rate_index;
  95         struct ieee80211_tx_rate *r = &info->control.rates[0];
  96
  97         info->antenna_sel_tx =
  98                 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
  99         if (rate_n_flags & RATE_MCS_HT_MSK)
 100                 r->flags |= IEEE80211_TX_RC_MCS;
 101         if (rate_n_flags & RATE_MCS_GF_MSK)
 102                 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
 103         if (rate_n_flags & RATE_MCS_FAT_MSK)
 104                 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
 105         if (rate_n_flags & RATE_MCS_DUP_MSK)
 106                 r->flags |= IEEE80211_TX_RC_DUP_DATA;
 107         if (rate_n_flags & RATE_MCS_SGI_MSK)
 108                 r->flags |= IEEE80211_TX_RC_SHORT_GI;
 109         rate_index = iwl_hwrate_to_plcp_idx(rate_n_flags);
 110         if (info->band == IEEE80211_BAND_5GHZ)
 111                 rate_index -= IWL_FIRST_OFDM_RATE;
 112         r->idx = rate_index;
 113 }
 114 EXPORT_SYMBOL(iwl_hwrate_to_tx_control);
 115
 116 int iwl_hwrate_to_plcp_idx(u32 rate_n_flags)
 117 {
 118         int idx = 0;
 119
 120         /* HT rate format */
 121         if (rate_n_flags & RATE_MCS_HT_MSK) {
 122                 idx = (rate_n_flags & 0xff);
 123
 124                 if (idx >= IWL_RATE_MIMO3_6M_PLCP)
 125                         idx = idx - IWL_RATE_MIMO3_6M_PLCP;
 126                 else if (idx >= IWL_RATE_MIMO2_6M_PLCP)
 127                         idx = idx - IWL_RATE_MIMO2_6M_PLCP;
 128
 129                 idx += IWL_FIRST_OFDM_RATE;
 130                 /* skip 9M not supported in ht*/
 131                 if (idx >= IWL_RATE_9M_INDEX)
 132                         idx += 1;
 133                 if ((idx >= IWL_FIRST_OFDM_RATE) && (idx <= IWL_LAST_OFDM_RATE))
 134                         return idx;
 135
 136         /* legacy rate format, search for match in table */
 137         } else {
 138                 for (idx = 0; idx < ARRAY_SIZE(iwl_rates); idx++)
 139                         if (iwl_rates[idx].plcp == (rate_n_flags & 0xFF))
 140                                 return idx;
 141         }
 142
 143         return -1;
 144 }
 145 EXPORT_SYMBOL(iwl_hwrate_to_plcp_idx);
 146
 147 u8 iwl_toggle_tx_ant(struct iwl_priv *priv, u8 ant)
 148 {
 149         int i;
 150         u8 ind = ant;
 151         for (i = 0; i < RATE_ANT_NUM - 1; i++) {
 152                 ind = (ind + 1) < RATE_ANT_NUM ?  ind + 1 : 0;
 153                 if (priv->hw_params.valid_tx_ant & BIT(ind))
 154                         return ind;
 155         }
 156         return ant;
 157 }
 158
 159 const u8 iwl_bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
 160 EXPORT_SYMBOL(iwl_bcast_addr);
 161
 162
 163 /* This function both allocates and initializes hw and priv. */
 164 struct ieee80211_hw *iwl_alloc_all(struct iwl_cfg *cfg,
 165                 struct ieee80211_ops *hw_ops)
 166 {
 167         struct iwl_priv *priv;
 168
 169         /* mac80211 allocates memory for this device instance, including
 170          *   space for this driver's private structure */
 171         struct ieee80211_hw *hw =
 172                 ieee80211_alloc_hw(sizeof(struct iwl_priv), hw_ops);
 173         if (hw == NULL) {
 174                 printk(KERN_ERR "%s: Can not allocate network device\n",
 175                        cfg->name);
 176                 goto out;
 177         }
 178
 179         priv = hw->priv;
 180         priv->hw = hw;
 181
 182 out:
 183         return hw;
 184 }
 185 EXPORT_SYMBOL(iwl_alloc_all);
 186
 187 void iwl_hw_detect(struct iwl_priv *priv)
 188 {
 189         priv->hw_rev = _iwl_read32(priv, CSR_HW_REV);
 190         priv->hw_wa_rev = _iwl_read32(priv, CSR_HW_REV_WA_REG);
 191         pci_read_config_byte(priv->pci_dev, PCI_REVISION_ID, &priv->rev_id);
 192 }
 193 EXPORT_SYMBOL(iwl_hw_detect);
 194
 195 int iwl_hw_nic_init(struct iwl_priv *priv)
 196 {
 197         unsigned long flags;
 198         struct iwl_rx_queue *rxq = &priv->rxq;
 199         int ret;
 200
 201         /* nic_init */
 202         spin_lock_irqsave(&priv->lock, flags);
 203         priv->cfg->ops->lib->apm_ops.init(priv);
 204         iwl_write32(priv, CSR_INT_COALESCING, 512 / 32);
 205         spin_unlock_irqrestore(&priv->lock, flags);
 206
 207         ret = priv->cfg->ops->lib->apm_ops.set_pwr_src(priv, IWL_PWR_SRC_VMAIN);
 208
 209         priv->cfg->ops->lib->apm_ops.config(priv);
 210
 211         /* Allocate the RX queue, or reset if it is already allocated */
 212         if (!rxq->bd) {
 213                 ret = iwl_rx_queue_alloc(priv);
 214                 if (ret) {
 215                         IWL_ERR(priv, "Unable to initialize Rx queue\n");
 216                         return -ENOMEM;
 217                 }
 218         } else
 219                 iwl_rx_queue_reset(priv, rxq);
 220
 221         iwl_rx_replenish(priv);
 222
 223         iwl_rx_init(priv, rxq);
 224
 225         spin_lock_irqsave(&priv->lock, flags);
 226
 227         rxq->need_update = 1;
 228         iwl_rx_queue_update_write_ptr(priv, rxq);
 229
 230         spin_unlock_irqrestore(&priv->lock, flags);
 231
 232         /* Allocate and init all Tx and Command queues */
 233         ret = iwl_txq_ctx_reset(priv);
 234         if (ret)
 235                 return ret;
 236
 237         set_bit(STATUS_INIT, &priv->status);
 238
 239         return 0;
 240 }
 241 EXPORT_SYMBOL(iwl_hw_nic_init);
 242
 243 /*
 244  * QoS  support
 245 */
 246 void iwl_activate_qos(struct iwl_priv *priv, u8 force)
 247 {
 248         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 249                 return;
 250
 251         priv->qos_data.def_qos_parm.qos_flags = 0;
 252
 253         if (priv->qos_data.qos_cap.q_AP.queue_request &&
 254             !priv->qos_data.qos_cap.q_AP.txop_request)
 255                 priv->qos_data.def_qos_parm.qos_flags |=
 256                         QOS_PARAM_FLG_TXOP_TYPE_MSK;
 257         if (priv->qos_data.qos_active)
 258                 priv->qos_data.def_qos_parm.qos_flags |=
 259                         QOS_PARAM_FLG_UPDATE_EDCA_MSK;
 260
 261         if (priv->current_ht_config.is_ht)
 262                 priv->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
 263
 264         if (force || iwl_is_associated(priv)) {
 265                 IWL_DEBUG_QOS(priv, "send QoS cmd with Qos active=%d FLAGS=0x%X\n",
 266                                 priv->qos_data.qos_active,
 267                                 priv->qos_data.def_qos_parm.qos_flags);
 268
 269                 iwl_send_cmd_pdu_async(priv, REPLY_QOS_PARAM,
 270                                        sizeof(struct iwl_qosparam_cmd),
 271                                        &priv->qos_data.def_qos_parm, NULL);
 272         }
 273 }
 274 EXPORT_SYMBOL(iwl_activate_qos);
 275
 276 /*
 277  * AC        CWmin         CW max      AIFSN      TXOP Limit    TXOP Limit
 278  *                                              (802.11b)      (802.11a/g)
 279  * AC_BK      15            1023        7           0               0
 280  * AC_BE      15            1023        3           0               0
 281  * AC_VI       7              15        2          6.016ms       3.008ms
 282  * AC_VO       3               7        2          3.264ms       1.504ms
 283  */
 284 void iwl_reset_qos(struct iwl_priv *priv)
 285 {
 286         u16 cw_min = 15;
 287         u16 cw_max = 1023;
 288         u8 aifs = 2;
 289         bool is_legacy = false;
 290         unsigned long flags;
 291         int i;
 292
 293         spin_lock_irqsave(&priv->lock, flags);
 294         /* QoS always active in AP and ADHOC mode
 295          * In STA mode wait for association
 296          */
 297         if (priv->iw_mode == NL80211_IFTYPE_ADHOC ||
 298             priv->iw_mode == NL80211_IFTYPE_AP)
 299                 priv->qos_data.qos_active = 1;
 300         else
 301                 priv->qos_data.qos_active = 0;
 302
 303         /* check for legacy mode */
 304         if ((priv->iw_mode == NL80211_IFTYPE_ADHOC &&
 305             (priv->active_rate & IWL_OFDM_RATES_MASK) == 0) ||
 306             (priv->iw_mode == NL80211_IFTYPE_STATION &&
 307             (priv->staging_rxon.flags & RXON_FLG_SHORT_SLOT_MSK) == 0)) {
 308                 cw_min = 31;
 309                 is_legacy = 1;
 310         }
 311
 312         if (priv->qos_data.qos_active)
 313                 aifs = 3;
 314
 315         /* AC_BE */
 316         priv->qos_data.def_qos_parm.ac[0].cw_min = cpu_to_le16(cw_min);
 317         priv->qos_data.def_qos_parm.ac[0].cw_max = cpu_to_le16(cw_max);
 318         priv->qos_data.def_qos_parm.ac[0].aifsn = aifs;
 319         priv->qos_data.def_qos_parm.ac[0].edca_txop = 0;
 320         priv->qos_data.def_qos_parm.ac[0].reserved1 = 0;
 321
 322         if (priv->qos_data.qos_active) {
 323                 /* AC_BK */
 324                 i = 1;
 325                 priv->qos_data.def_qos_parm.ac[i].cw_min = cpu_to_le16(cw_min);
 326                 priv->qos_data.def_qos_parm.ac[i].cw_max = cpu_to_le16(cw_max);
 327                 priv->qos_data.def_qos_parm.ac[i].aifsn = 7;
 328                 priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
 329                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
 330
 331                 /* AC_VI */
 332                 i = 2;
 333                 priv->qos_data.def_qos_parm.ac[i].cw_min =
 334                         cpu_to_le16((cw_min + 1) / 2 - 1);
 335                 priv->qos_data.def_qos_parm.ac[i].cw_max =
 336                         cpu_to_le16(cw_min);
 337                 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
 338                 if (is_legacy)
 339                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
 340                                 cpu_to_le16(6016);
 341                 else
 342                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
 343                                 cpu_to_le16(3008);
 344                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
 345
 346                 /* AC_VO */
 347                 i = 3;
 348                 priv->qos_data.def_qos_parm.ac[i].cw_min =
 349                         cpu_to_le16((cw_min + 1) / 4 - 1);
 350                 priv->qos_data.def_qos_parm.ac[i].cw_max =
 351                         cpu_to_le16((cw_min + 1) / 2 - 1);
 352                 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
 353                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
 354                 if (is_legacy)
 355                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
 356                                 cpu_to_le16(3264);
 357                 else
 358                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
 359                                 cpu_to_le16(1504);
 360         } else {
 361                 for (i = 1; i < 4; i++) {
 362                         priv->qos_data.def_qos_parm.ac[i].cw_min =
 363                                 cpu_to_le16(cw_min);
 364                         priv->qos_data.def_qos_parm.ac[i].cw_max =
 365                                 cpu_to_le16(cw_max);
 366                         priv->qos_data.def_qos_parm.ac[i].aifsn = aifs;
 367                         priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
 368                         priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
 369                 }
 370         }
 371         IWL_DEBUG_QOS(priv, "set QoS to default \n");
 372
 373         spin_unlock_irqrestore(&priv->lock, flags);
 374 }
 375 EXPORT_SYMBOL(iwl_reset_qos);
 376
 377 #define MAX_BIT_RATE_40_MHZ 150 /* Mbps */
 378 #define MAX_BIT_RATE_20_MHZ 72 /* Mbps */
 379 static void iwlcore_init_ht_hw_capab(const struct iwl_priv *priv,
 380                               struct ieee80211_sta_ht_cap *ht_info,
 381                               enum ieee80211_band band)
 382 {
 383         u16 max_bit_rate = 0;
 384         u8 rx_chains_num = priv->hw_params.rx_chains_num;
 385         u8 tx_chains_num = priv->hw_params.tx_chains_num;
 386
 387         ht_info->cap = 0;
 388         memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));
 389
 390         ht_info->ht_supported = true;
 391
 392         ht_info->cap |= IEEE80211_HT_CAP_GRN_FLD;
 393         ht_info->cap |= IEEE80211_HT_CAP_SGI_20;
 394         ht_info->cap |= (IEEE80211_HT_CAP_SM_PS &
 395                              (WLAN_HT_CAP_SM_PS_DISABLED << 2));
 396
 397         max_bit_rate = MAX_BIT_RATE_20_MHZ;
 398         if (priv->hw_params.fat_channel & BIT(band)) {
 399                 ht_info->cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 400                 ht_info->cap |= IEEE80211_HT_CAP_SGI_40;
 401                 ht_info->mcs.rx_mask[4] = 0x01;
 402                 max_bit_rate = MAX_BIT_RATE_40_MHZ;
 403         }
 404
 405         if (priv->cfg->mod_params->amsdu_size_8K)
 406                 ht_info->cap |= IEEE80211_HT_CAP_MAX_AMSDU;
 407
 408         ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
 409         ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;
 410
 411         ht_info->mcs.rx_mask[0] = 0xFF;
 412         if (rx_chains_num >= 2)
 413                 ht_info->mcs.rx_mask[1] = 0xFF;
 414         if (rx_chains_num >= 3)
 415                 ht_info->mcs.rx_mask[2] = 0xFF;
 416
 417         /* Highest supported Rx data rate */
 418         max_bit_rate *= rx_chains_num;
 419         WARN_ON(max_bit_rate & ~IEEE80211_HT_MCS_RX_HIGHEST_MASK);
 420         ht_info->mcs.rx_highest = cpu_to_le16(max_bit_rate);
 421
 422         /* Tx MCS capabilities */
 423         ht_info->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
 424         if (tx_chains_num != rx_chains_num) {
 425                 ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
 426                 ht_info->mcs.tx_params |= ((tx_chains_num - 1) <<
 427                                 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT);
 428         }
 429 }
 430
 431 static void iwlcore_init_hw_rates(struct iwl_priv *priv,
 432                               struct ieee80211_rate *rates)
 433 {
 434         int i;
 435
 436         for (i = 0; i < IWL_RATE_COUNT; i++) {
 437                 rates[i].bitrate = iwl_rates[i].ieee * 5;
 438                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
 439                 rates[i].hw_value_short = i;
 440                 rates[i].flags = 0;
 441                 if ((i > IWL_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
 442                         /*
 443                          * If CCK != 1M then set short preamble rate flag.
 444                          */
 445                         rates[i].flags |=
 446                                 (iwl_rates[i].plcp == IWL_RATE_1M_PLCP) ?
 447                                         0 : IEEE80211_RATE_SHORT_PREAMBLE;
 448                 }
 449         }
 450 }
 451
 452
 453 /**
 454  * iwlcore_init_geos - Initialize mac80211's geo/channel info based from eeprom
 455  */
 456 int iwlcore_init_geos(struct iwl_priv *priv)
 457 {
 458         struct iwl_channel_info *ch;
 459         struct ieee80211_supported_band *sband;
 460         struct ieee80211_channel *channels;
 461         struct ieee80211_channel *geo_ch;
 462         struct ieee80211_rate *rates;
 463         int i = 0;
 464
 465         if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
 466             priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
 467                 IWL_DEBUG_INFO(priv, "Geography modes already initialized.\n");
 468                 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
 469                 return 0;
 470         }
 471
 472         channels = kzalloc(sizeof(struct ieee80211_channel) *
 473                            priv->channel_count, GFP_KERNEL);
 474         if (!channels)
 475                 return -ENOMEM;
 476
 477         rates = kzalloc((sizeof(struct ieee80211_rate) * (IWL_RATE_COUNT + 1)),
 478                         GFP_KERNEL);
 479         if (!rates) {
 480                 kfree(channels);
 481                 return -ENOMEM;
 482         }
 483
 484         /* 5.2GHz channels start after the 2.4GHz channels */
 485         sband = &priv->bands[IEEE80211_BAND_5GHZ];
 486         sband->channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)];
 487         /* just OFDM */
 488         sband->bitrates = &rates[IWL_FIRST_OFDM_RATE];
 489         sband->n_bitrates = IWL_RATE_COUNT - IWL_FIRST_OFDM_RATE;
 490
 491         if (priv->cfg->sku & IWL_SKU_N)
 492                 iwlcore_init_ht_hw_capab(priv, &sband->ht_cap,
 493                                          IEEE80211_BAND_5GHZ);
 494
 495         sband = &priv->bands[IEEE80211_BAND_2GHZ];
 496         sband->channels = channels;
 497         /* OFDM & CCK */
 498         sband->bitrates = rates;
 499         sband->n_bitrates = IWL_RATE_COUNT;
 500
 501         if (priv->cfg->sku & IWL_SKU_N)
 502                 iwlcore_init_ht_hw_capab(priv, &sband->ht_cap,
 503                                          IEEE80211_BAND_2GHZ);
 504
 505         priv->ieee_channels = channels;
 506         priv->ieee_rates = rates;
 507
 508         for (i = 0;  i < priv->channel_count; i++) {
 509                 ch = &priv->channel_info[i];
 510
 511                 /* FIXME: might be removed if scan is OK */
 512                 if (!is_channel_valid(ch))
 513                         continue;
 514
 515                 if (is_channel_a_band(ch))
 516                         sband =  &priv->bands[IEEE80211_BAND_5GHZ];
 517                 else
 518                         sband =  &priv->bands[IEEE80211_BAND_2GHZ];
 519
 520                 geo_ch = &sband->channels[sband->n_channels++];
 521
 522                 geo_ch->center_freq =
 523                                 ieee80211_channel_to_frequency(ch->channel);
 524                 geo_ch->max_power = ch->max_power_avg;
 525                 geo_ch->max_antenna_gain = 0xff;
 526                 geo_ch->hw_value = ch->channel;
 527
 528                 if (is_channel_valid(ch)) {
 529                         if (!(ch->flags & EEPROM_CHANNEL_IBSS))
 530                                 geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
 531
 532                         if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
 533                                 geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
 534
 535                         if (ch->flags & EEPROM_CHANNEL_RADAR)
 536                                 geo_ch->flags |= IEEE80211_CHAN_RADAR;
 537
 538                         geo_ch->flags |= ch->fat_extension_channel;
 539
 540                         if (ch->max_power_avg > priv->tx_power_channel_lmt)
 541                                 priv->tx_power_channel_lmt = ch->max_power_avg;
 542                 } else {
 543                         geo_ch->flags |= IEEE80211_CHAN_DISABLED;
 544                 }
 545
 546                 /* Save flags for reg domain usage */
 547                 geo_ch->orig_flags = geo_ch->flags;
 548
 549                 IWL_DEBUG_INFO(priv, "Channel %d Freq=%d[%sGHz] %s flag=0x%X\n",
 550                                 ch->channel, geo_ch->center_freq,
 551                                 is_channel_a_band(ch) ?  "5.2" : "2.4",
 552                                 geo_ch->flags & IEEE80211_CHAN_DISABLED ?
 553                                 "restricted" : "valid",
 554                                  geo_ch->flags);
 555         }
 556
 557         if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) &&
 558              priv->cfg->sku & IWL_SKU_A) {
 559                 IWL_INFO(priv, "Incorrectly detected BG card as ABG. "
 560                         "Please send your PCI ID 0x%04X:0x%04X to maintainer.\n",
 561                            priv->pci_dev->device,
 562                            priv->pci_dev->subsystem_device);
 563                 priv->cfg->sku &= ~IWL_SKU_A;
 564         }
 565
 566         IWL_INFO(priv, "Tunable channels: %d 802.11bg, %d 802.11a channels\n",
 567                    priv->bands[IEEE80211_BAND_2GHZ].n_channels,
 568                    priv->bands[IEEE80211_BAND_5GHZ].n_channels);
 569
 570         set_bit(STATUS_GEO_CONFIGURED, &priv->status);
 571
 572         return 0;
 573 }
 574 EXPORT_SYMBOL(iwlcore_init_geos);
 575
 576 /*
 577  * iwlcore_free_geos - undo allocations in iwlcore_init_geos
 578  */
 579 void iwlcore_free_geos(struct iwl_priv *priv)
 580 {
 581         kfree(priv->ieee_channels);
 582         kfree(priv->ieee_rates);
 583         clear_bit(STATUS_GEO_CONFIGURED, &priv->status);
 584 }
 585 EXPORT_SYMBOL(iwlcore_free_geos);
 586
 587 static bool is_single_rx_stream(struct iwl_priv *priv)
 588 {
 589         return !priv->current_ht_config.is_ht ||
 590                ((priv->current_ht_config.mcs.rx_mask[1] == 0) &&
 591                 (priv->current_ht_config.mcs.rx_mask[2] == 0));
 592 }
 593
 594 static u8 iwl_is_channel_extension(struct iwl_priv *priv,
 595                                    enum ieee80211_band band,
 596                                    u16 channel, u8 extension_chan_offset)
 597 {
 598         const struct iwl_channel_info *ch_info;
 599
 600         ch_info = iwl_get_channel_info(priv, band, channel);
 601         if (!is_channel_valid(ch_info))
 602                 return 0;
 603
 604         if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE)
 605                 return !(ch_info->fat_extension_channel &
 606                                         IEEE80211_CHAN_NO_FAT_ABOVE);
 607         else if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW)
 608                 return !(ch_info->fat_extension_channel &
 609                                         IEEE80211_CHAN_NO_FAT_BELOW);
 610
 611         return 0;
 612 }
 613
 614 u8 iwl_is_fat_tx_allowed(struct iwl_priv *priv,
 615                          struct ieee80211_sta_ht_cap *sta_ht_inf)
 616 {
 617         struct iwl_ht_info *iwl_ht_conf = &priv->current_ht_config;
 618
 619         if ((!iwl_ht_conf->is_ht) ||
 620            (iwl_ht_conf->supported_chan_width != IWL_CHANNEL_WIDTH_40MHZ) ||
 621            (iwl_ht_conf->extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_NONE))
 622                 return 0;
 623
 624         if (sta_ht_inf) {
 625                 if ((!sta_ht_inf->ht_supported) ||
 626                    (!(sta_ht_inf->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40)))
 627                         return 0;
 628         }
 629
 630         return iwl_is_channel_extension(priv, priv->band,
 631                                         le16_to_cpu(priv->staging_rxon.channel),
 632                                         iwl_ht_conf->extension_chan_offset);
 633 }
 634 EXPORT_SYMBOL(iwl_is_fat_tx_allowed);
 635
 636 void iwl_set_rxon_hwcrypto(struct iwl_priv *priv, int hw_decrypt)
 637 {
 638         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
 639
 640         if (hw_decrypt)
 641                 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
 642         else
 643                 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
 644
 645 }
 646 EXPORT_SYMBOL(iwl_set_rxon_hwcrypto);
 647
 648 /**
 649  * iwl_check_rxon_cmd - validate RXON structure is valid
 650  *
 651  * NOTE:  This is really only useful during development and can eventually
 652  * be #ifdef'd out once the driver is stable and folks aren't actively
 653  * making changes
 654  */
 655 int iwl_check_rxon_cmd(struct iwl_priv *priv)
 656 {
 657         int error = 0;
 658         int counter = 1;
 659         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
 660
 661         if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
 662                 error |= le32_to_cpu(rxon->flags &
 663                                 (RXON_FLG_TGJ_NARROW_BAND_MSK |
 664                                  RXON_FLG_RADAR_DETECT_MSK));
 665                 if (error)
 666                         IWL_WARN(priv, "check 24G fields %d | %d\n",
 667                                     counter++, error);
 668         } else {
 669                 error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ?
 670                                 0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK);
 671                 if (error)
 672                         IWL_WARN(priv, "check 52 fields %d | %d\n",
 673                                     counter++, error);
 674                 error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK);
 675                 if (error)
 676                         IWL_WARN(priv, "check 52 CCK %d | %d\n",
 677                                     counter++, error);
 678         }
 679         error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1;
 680         if (error)
 681                 IWL_WARN(priv, "check mac addr %d | %d\n", counter++, error);
 682
 683         /* make sure basic rates 6Mbps and 1Mbps are supported */
 684         error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) &&
 685                   ((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0));
 686         if (error)
 687                 IWL_WARN(priv, "check basic rate %d | %d\n", counter++, error);
 688
 689         error |= (le16_to_cpu(rxon->assoc_id) > 2007);
 690         if (error)
 691                 IWL_WARN(priv, "check assoc id %d | %d\n", counter++, error);
 692
 693         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
 694                         == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK));
 695         if (error)
 696                 IWL_WARN(priv, "check CCK and short slot %d | %d\n",
 697                             counter++, error);
 698
 699         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
 700                         == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK));
 701         if (error)
 702                 IWL_WARN(priv, "check CCK & auto detect %d | %d\n",
 703                             counter++, error);
 704
 705         error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
 706                         RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK);
 707         if (error)
 708                 IWL_WARN(priv, "check TGG and auto detect %d | %d\n",
 709                             counter++, error);
 710
 711         if (error)
 712                 IWL_WARN(priv, "Tuning to channel %d\n",
 713                             le16_to_cpu(rxon->channel));
 714
 715         if (error) {
 716                 IWL_ERR(priv, "Not a valid iwl_rxon_assoc_cmd field values\n");
 717                 return -1;
 718         }
 719         return 0;
 720 }
 721 EXPORT_SYMBOL(iwl_check_rxon_cmd);
 722
 723 /**
 724  * iwl_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
 725  * @priv: staging_rxon is compared to active_rxon
 726  *
 727  * If the RXON structure is changing enough to require a new tune,
 728  * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
 729  * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
 730  */
 731 int iwl_full_rxon_required(struct iwl_priv *priv)
 732 {
 733
 734         /* These items are only settable from the full RXON command */
 735         if (!(iwl_is_associated(priv)) ||
 736             compare_ether_addr(priv->staging_rxon.bssid_addr,
 737                                priv->active_rxon.bssid_addr) ||
 738             compare_ether_addr(priv->staging_rxon.node_addr,
 739                                priv->active_rxon.node_addr) ||
 740             compare_ether_addr(priv->staging_rxon.wlap_bssid_addr,
 741                                priv->active_rxon.wlap_bssid_addr) ||
 742             (priv->staging_rxon.dev_type != priv->active_rxon.dev_type) ||
 743             (priv->staging_rxon.channel != priv->active_rxon.channel) ||
 744             (priv->staging_rxon.air_propagation !=
 745              priv->active_rxon.air_propagation) ||
 746             (priv->staging_rxon.ofdm_ht_single_stream_basic_rates !=
 747              priv->active_rxon.ofdm_ht_single_stream_basic_rates) ||
 748             (priv->staging_rxon.ofdm_ht_dual_stream_basic_rates !=
 749              priv->active_rxon.ofdm_ht_dual_stream_basic_rates) ||
 750             (priv->staging_rxon.ofdm_ht_triple_stream_basic_rates !=
 751              priv->active_rxon.ofdm_ht_triple_stream_basic_rates) ||
 752             (priv->staging_rxon.assoc_id != priv->active_rxon.assoc_id))
 753                 return 1;
 754
 755         /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
 756          * be updated with the RXON_ASSOC command -- however only some
 757          * flag transitions are allowed using RXON_ASSOC */
 758
 759         /* Check if we are not switching bands */
 760         if ((priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) !=
 761             (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK))
 762                 return 1;
 763
 764         /* Check if we are switching association toggle */
 765         if ((priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) !=
 766                 (priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK))
 767                 return 1;
 768
 769         return 0;
 770 }
 771 EXPORT_SYMBOL(iwl_full_rxon_required);
 772
 773 u8 iwl_rate_get_lowest_plcp(struct iwl_priv *priv)
 774 {
 775         int i;
 776         int rate_mask;
 777
 778         /* Set rate mask*/
 779         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)
 780                 rate_mask = priv->active_rate_basic & IWL_CCK_RATES_MASK;
 781         else
 782                 rate_mask = priv->active_rate_basic & IWL_OFDM_RATES_MASK;
 783
 784         /* Find lowest valid rate */
 785         for (i = IWL_RATE_1M_INDEX; i != IWL_RATE_INVALID;
 786                                         i = iwl_rates[i].next_ieee) {
 787                 if (rate_mask & (1 << i))
 788                         return iwl_rates[i].plcp;
 789         }
 790
 791         /* No valid rate was found. Assign the lowest one */
 792         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)
 793                 return IWL_RATE_1M_PLCP;
 794         else
 795                 return IWL_RATE_6M_PLCP;
 796 }
 797 EXPORT_SYMBOL(iwl_rate_get_lowest_plcp);
 798
 799 void iwl_set_rxon_ht(struct iwl_priv *priv, struct iwl_ht_info *ht_info)
 800 {
 801         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
 802         u32 val;
 803
 804         if (!ht_info->is_ht) {
 805                 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED_MSK |
 806                         RXON_FLG_CHANNEL_MODE_PURE_40_MSK |
 807                         RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK |
 808                         RXON_FLG_FAT_PROT_MSK |
 809                         RXON_FLG_HT_PROT_MSK);
 810                 return;
 811         }
 812
 813         /* Set up channel bandwidth:  20 MHz only, or 20/40 mixed if fat ok */
 814         if (iwl_is_fat_tx_allowed(priv, NULL))
 815                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED_MSK;
 816         else
 817                 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED_MSK |
 818                                  RXON_FLG_CHANNEL_MODE_PURE_40_MSK);
 819
 820         /* Note: control channel is opposite of extension channel */
 821         switch (ht_info->extension_chan_offset) {
 822         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 823                 rxon->flags &= ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
 824                 break;
 825         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 826                 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
 827                 break;
 828         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
 829         default:
 830                 rxon->flags &= ~RXON_FLG_CHANNEL_MODE_MIXED_MSK;
 831                 break;
 832         }
 833
 834         val = ht_info->ht_protection;
 835
 836         rxon->flags |= cpu_to_le32(val << RXON_FLG_HT_OPERATING_MODE_POS);
 837
 838         if (priv->cfg->ops->hcmd->set_rxon_chain)
 839                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
 840
 841         IWL_DEBUG_ASSOC(priv, "supported HT rate 0x%X 0x%X 0x%X "
 842                         "rxon flags 0x%X operation mode :0x%X "
 843                         "extension channel offset 0x%x\n",
 844                         ht_info->mcs.rx_mask[0],
 845                         ht_info->mcs.rx_mask[1],
 846                         ht_info->mcs.rx_mask[2],
 847                         le32_to_cpu(rxon->flags), ht_info->ht_protection,
 848                         ht_info->extension_chan_offset);
 849         return;
 850 }
 851 EXPORT_SYMBOL(iwl_set_rxon_ht);
 852
 853 #define IWL_NUM_RX_CHAINS_MULTIPLE      3
 854 #define IWL_NUM_RX_CHAINS_SINGLE        2
 855 #define IWL_NUM_IDLE_CHAINS_DUAL        2
 856 #define IWL_NUM_IDLE_CHAINS_SINGLE      1
 857
 858 /* Determine how many receiver/antenna chains to use.
 859  * More provides better reception via diversity.  Fewer saves power.
 860  * MIMO (dual stream) requires at least 2, but works better with 3.
 861  * This does not determine *which* chains to use, just how many.
 862  */
 863 static int iwl_get_active_rx_chain_count(struct iwl_priv *priv)
 864 {
 865         bool is_single = is_single_rx_stream(priv);
 866         bool is_cam = !test_bit(STATUS_POWER_PMI, &priv->status);
 867
 868         /* # of Rx chains to use when expecting MIMO. */
 869         if (is_single || (!is_cam && (priv->current_ht_config.sm_ps ==
 870                                                  WLAN_HT_CAP_SM_PS_STATIC)))
 871                 return IWL_NUM_RX_CHAINS_SINGLE;
 872         else
 873                 return IWL_NUM_RX_CHAINS_MULTIPLE;
 874 }
 875
 876 static int iwl_get_idle_rx_chain_count(struct iwl_priv *priv, int active_cnt)
 877 {
 878         int idle_cnt;
 879         bool is_cam = !test_bit(STATUS_POWER_PMI, &priv->status);
 880         /* # Rx chains when idling and maybe trying to save power */
 881         switch (priv->current_ht_config.sm_ps) {
 882         case WLAN_HT_CAP_SM_PS_STATIC:
 883         case WLAN_HT_CAP_SM_PS_DYNAMIC:
 884                 idle_cnt = (is_cam) ? IWL_NUM_IDLE_CHAINS_DUAL :
 885                                         IWL_NUM_IDLE_CHAINS_SINGLE;
 886                 break;
 887         case WLAN_HT_CAP_SM_PS_DISABLED:
 888                 idle_cnt = (is_cam) ? active_cnt : IWL_NUM_IDLE_CHAINS_SINGLE;
 889                 break;
 890         case WLAN_HT_CAP_SM_PS_INVALID:
 891         default:
 892                 IWL_ERR(priv, "invalid mimo ps mode %d\n",
 893                            priv->current_ht_config.sm_ps);
 894                 WARN_ON(1);
 895                 idle_cnt = -1;
 896                 break;
 897         }
 898         return idle_cnt;
 899 }
 900
 901 /* up to 4 chains */
 902 static u8 iwl_count_chain_bitmap(u32 chain_bitmap)
 903 {
 904         u8 res;
 905         res = (chain_bitmap & BIT(0)) >> 0;
 906         res += (chain_bitmap & BIT(1)) >> 1;
 907         res += (chain_bitmap & BIT(2)) >> 2;
 908         res += (chain_bitmap & BIT(4)) >> 4;
 909         return res;
 910 }
 911
 912 /**
 913  * iwl_is_monitor_mode - Determine if interface in monitor mode
 914  *
 915  * priv->iw_mode is set in add_interface, but add_interface is
 916  * never called for monitor mode. The only way mac80211 informs us about
 917  * monitor mode is through configuring filters (call to configure_filter).
 918  */
 919 bool iwl_is_monitor_mode(struct iwl_priv *priv)
 920 {
 921         return !!(priv->staging_rxon.filter_flags & RXON_FILTER_PROMISC_MSK);
 922 }
 923 EXPORT_SYMBOL(iwl_is_monitor_mode);
 924
 925 /**
 926  * iwl_set_rxon_chain - Set up Rx chain usage in "staging" RXON image
 927  *
 928  * Selects how many and which Rx receivers/antennas/chains to use.
 929  * This should not be used for scan command ... it puts data in wrong place.
 930  */
 931 void iwl_set_rxon_chain(struct iwl_priv *priv)
 932 {
 933         bool is_single = is_single_rx_stream(priv);
 934         bool is_cam = !test_bit(STATUS_POWER_PMI, &priv->status);
 935         u8 idle_rx_cnt, active_rx_cnt, valid_rx_cnt;
 936         u32 active_chains;
 937         u16 rx_chain;
 938
 939         /* Tell uCode which antennas are actually connected.
 940          * Before first association, we assume all antennas are connected.
 941          * Just after first association, iwl_chain_noise_calibration()
 942          *    checks which antennas actually *are* connected. */
 943          if (priv->chain_noise_data.active_chains)
 944                 active_chains = priv->chain_noise_data.active_chains;
 945         else
 946                 active_chains = priv->hw_params.valid_rx_ant;
 947
 948         rx_chain = active_chains << RXON_RX_CHAIN_VALID_POS;
 949
 950         /* How many receivers should we use? */
 951         active_rx_cnt = iwl_get_active_rx_chain_count(priv);
 952         idle_rx_cnt = iwl_get_idle_rx_chain_count(priv, active_rx_cnt);
 953
 954
 955         /* correct rx chain count according hw settings
 956          * and chain noise calibration
 957          */
 958         valid_rx_cnt = iwl_count_chain_bitmap(active_chains);
 959         if (valid_rx_cnt < active_rx_cnt)
 960                 active_rx_cnt = valid_rx_cnt;
 961
 962         if (valid_rx_cnt < idle_rx_cnt)
 963                 idle_rx_cnt = valid_rx_cnt;
 964
 965         rx_chain |= active_rx_cnt << RXON_RX_CHAIN_MIMO_CNT_POS;
 966         rx_chain |= idle_rx_cnt  << RXON_RX_CHAIN_CNT_POS;
 967
 968         /* copied from 'iwl_bg_request_scan()' */
 969         /* Force use of chains B and C (0x6) for Rx for 4965
 970          * Avoid A (0x1) because of its off-channel reception on A-band.
 971          * MIMO is not used here, but value is required */
 972         if (iwl_is_monitor_mode(priv) &&
 973             !(priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) &&
 974             ((priv->hw_rev & CSR_HW_REV_TYPE_MSK) == CSR_HW_REV_TYPE_4965)) {
 975                 rx_chain = ANT_ABC << RXON_RX_CHAIN_VALID_POS;
 976                 rx_chain |= ANT_BC << RXON_RX_CHAIN_FORCE_SEL_POS;
 977                 rx_chain |= ANT_ABC << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS;
 978                 rx_chain |= 0x1 << RXON_RX_CHAIN_DRIVER_FORCE_POS;
 979         }
 980
 981         priv->staging_rxon.rx_chain = cpu_to_le16(rx_chain);
 982
 983         if (!is_single && (active_rx_cnt >= IWL_NUM_RX_CHAINS_SINGLE) && is_cam)
 984                 priv->staging_rxon.rx_chain |= RXON_RX_CHAIN_MIMO_FORCE_MSK;
 985         else
 986                 priv->staging_rxon.rx_chain &= ~RXON_RX_CHAIN_MIMO_FORCE_MSK;
 987
 988         IWL_DEBUG_ASSOC(priv, "rx_chain=0x%X active=%d idle=%d\n",
 989                         priv->staging_rxon.rx_chain,
 990                         active_rx_cnt, idle_rx_cnt);
 991
 992         WARN_ON(active_rx_cnt == 0 || idle_rx_cnt == 0 ||
 993                 active_rx_cnt < idle_rx_cnt);
 994 }
 995 EXPORT_SYMBOL(iwl_set_rxon_chain);
 996
 997 /**
 998  * iwl_set_rxon_channel - Set the phymode and channel values in staging RXON
 999  * @phymode: MODE_IEEE80211A sets to 5.2GHz; all else set to 2.4GHz
1000  * @channel: Any channel valid for the requested phymode
1001
1002  * In addition to setting the staging RXON, priv->phymode is also set.
1003  *
1004  * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
1005  * in the staging RXON flag structure based on the phymode
1006  */
1007 int iwl_set_rxon_channel(struct iwl_priv *priv, struct ieee80211_channel *ch)
1008 {
1009         enum ieee80211_band band = ch->band;
1010         u16 channel = ieee80211_frequency_to_channel(ch->center_freq);
1011
1012         if (!iwl_get_channel_info(priv, band, channel)) {
1013                 IWL_DEBUG_INFO(priv, "Could not set channel to %d [%d]\n",
1014                                channel, band);
1015                 return -EINVAL;
1016         }
1017
1018         if ((le16_to_cpu(priv->staging_rxon.channel) == channel) &&
1019             (priv->band == band))
1020                 return 0;
1021
1022         priv->staging_rxon.channel = cpu_to_le16(channel);
1023         if (band == IEEE80211_BAND_5GHZ)
1024                 priv->staging_rxon.flags &= ~RXON_FLG_BAND_24G_MSK;
1025         else
1026                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
1027
1028         priv->band = band;
1029
1030         IWL_DEBUG_INFO(priv, "Staging channel set to %d [%d]\n", channel, band);
1031
1032         return 0;
1033 }
1034 EXPORT_SYMBOL(iwl_set_rxon_channel);
1035
1036 void iwl_set_flags_for_band(struct iwl_priv *priv,
1037                             enum ieee80211_band band)
1038 {
1039         if (band == IEEE80211_BAND_5GHZ) {
1040                 priv->staging_rxon.flags &=
1041                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
1042                       | RXON_FLG_CCK_MSK);
1043                 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
1044         } else {
1045                 /* Copied from iwl_post_associate() */
1046                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
1047                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
1048                 else
1049                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
1050
1051                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
1052                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
1053
1054                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
1055                 priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
1056                 priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
1057         }
1058 }
1059 EXPORT_SYMBOL(iwl_set_flags_for_band);
1060
1061 /*
1062  * initialize rxon structure with default values from eeprom
1063  */
1064 void iwl_connection_init_rx_config(struct iwl_priv *priv, int mode)
1065 {
1066         const struct iwl_channel_info *ch_info;
1067
1068         memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
1069
1070         switch (mode) {
1071         case NL80211_IFTYPE_AP:
1072                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
1073                 break;
1074
1075         case NL80211_IFTYPE_STATION:
1076                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
1077                 priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
1078                 break;
1079
1080         case NL80211_IFTYPE_ADHOC:
1081                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
1082                 priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
1083                 priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
1084                                                   RXON_FILTER_ACCEPT_GRP_MSK;
1085                 break;
1086
1087         default:
1088                 IWL_ERR(priv, "Unsupported interface type %d\n", mode);
1089                 break;
1090         }
1091
1092 #if 0
1093         /* TODO:  Figure out when short_preamble would be set and cache from
1094          * that */
1095         if (!hw_to_local(priv->hw)->short_preamble)
1096                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
1097         else
1098                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
1099 #endif
1100
1101         ch_info = iwl_get_channel_info(priv, priv->band,
1102                                        le16_to_cpu(priv->active_rxon.channel));
1103
1104         if (!ch_info)
1105                 ch_info = &priv->channel_info[0];
1106
1107         /*
1108          * in some case A channels are all non IBSS
1109          * in this case force B/G channel
1110          */
1111         if ((priv->iw_mode == NL80211_IFTYPE_ADHOC) &&
1112             !(is_channel_ibss(ch_info)))
1113                 ch_info = &priv->channel_info[0];
1114
1115         priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
1116         priv->band = ch_info->band;
1117
1118         iwl_set_flags_for_band(priv, priv->band);
1119
1120         priv->staging_rxon.ofdm_basic_rates =
1121             (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
1122         priv->staging_rxon.cck_basic_rates =
1123             (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
1124
1125         priv->staging_rxon.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED_MSK |
1126                                         RXON_FLG_CHANNEL_MODE_PURE_40_MSK);
1127         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
1128         memcpy(priv->staging_rxon.wlap_bssid_addr, priv->mac_addr, ETH_ALEN);
1129         priv->staging_rxon.ofdm_ht_single_stream_basic_rates = 0xff;
1130         priv->staging_rxon.ofdm_ht_dual_stream_basic_rates = 0xff;
1131         priv->staging_rxon.ofdm_ht_triple_stream_basic_rates = 0xff;
1132 }
1133 EXPORT_SYMBOL(iwl_connection_init_rx_config);
1134
1135 static void iwl_set_rate(struct iwl_priv *priv)
1136 {
1137         const struct ieee80211_supported_band *hw = NULL;
1138         struct ieee80211_rate *rate;
1139         int i;
1140
1141         hw = iwl_get_hw_mode(priv, priv->band);
1142         if (!hw) {
1143                 IWL_ERR(priv, "Failed to set rate: unable to get hw mode\n");
1144                 return;
1145         }
1146
1147         priv->active_rate = 0;
1148         priv->active_rate_basic = 0;
1149
1150         for (i = 0; i < hw->n_bitrates; i++) {
1151                 rate = &(hw->bitrates[i]);
1152                 if (rate->hw_value < IWL_RATE_COUNT)
1153                         priv->active_rate |= (1 << rate->hw_value);
1154         }
1155
1156         IWL_DEBUG_RATE(priv, "Set active_rate = %0x, active_rate_basic = %0x\n",
1157                        priv->active_rate, priv->active_rate_basic);
1158
1159         /*
1160          * If a basic rate is configured, then use it (adding IWL_RATE_1M_MASK)
1161          * otherwise set it to the default of all CCK rates and 6, 12, 24 for
1162          * OFDM
1163          */
1164         if (priv->active_rate_basic & IWL_CCK_BASIC_RATES_MASK)
1165                 priv->staging_rxon.cck_basic_rates =
1166                     ((priv->active_rate_basic &
1167                       IWL_CCK_RATES_MASK) >> IWL_FIRST_CCK_RATE) & 0xF;
1168         else
1169                 priv->staging_rxon.cck_basic_rates =
1170                     (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
1171
1172         if (priv->active_rate_basic & IWL_OFDM_BASIC_RATES_MASK)
1173                 priv->staging_rxon.ofdm_basic_rates =
1174                     ((priv->active_rate_basic &
1175                       (IWL_OFDM_BASIC_RATES_MASK | IWL_RATE_6M_MASK)) >>
1176                       IWL_FIRST_OFDM_RATE) & 0xFF;
1177         else
1178                 priv->staging_rxon.ofdm_basic_rates =
1179                    (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
1180 }
1181
1182 void iwl_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
1183 {
1184         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
1185         struct iwl_rxon_cmd *rxon = (void *)&priv->active_rxon;
1186         struct iwl_csa_notification *csa = &(pkt->u.csa_notif);
1187         IWL_DEBUG_11H(priv, "CSA notif: channel %d, status %d\n",
1188                       le16_to_cpu(csa->channel), le32_to_cpu(csa->status));
1189         rxon->channel = csa->channel;
1190         priv->staging_rxon.channel = csa->channel;
1191 }
1192 EXPORT_SYMBOL(iwl_rx_csa);
1193
1194 #ifdef CONFIG_IWLWIFI_DEBUG
1195 static void iwl_print_rx_config_cmd(struct iwl_priv *priv)
1196 {
1197         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
1198
1199         IWL_DEBUG_RADIO(priv, "RX CONFIG:\n");
1200         iwl_print_hex_dump(priv, IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
1201         IWL_DEBUG_RADIO(priv, "u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
1202         IWL_DEBUG_RADIO(priv, "u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
1203         IWL_DEBUG_RADIO(priv, "u32 filter_flags: 0x%08x\n",
1204                         le32_to_cpu(rxon->filter_flags));
1205         IWL_DEBUG_RADIO(priv, "u8 dev_type: 0x%x\n", rxon->dev_type);
1206         IWL_DEBUG_RADIO(priv, "u8 ofdm_basic_rates: 0x%02x\n",
1207                         rxon->ofdm_basic_rates);
1208         IWL_DEBUG_RADIO(priv, "u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
1209         IWL_DEBUG_RADIO(priv, "u8[6] node_addr: %pM\n", rxon->node_addr);
1210         IWL_DEBUG_RADIO(priv, "u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
1211         IWL_DEBUG_RADIO(priv, "u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
1212 }
1213 #endif
1214
1215 /**
1216  * iwl_irq_handle_error - called for HW or SW error interrupt from card
1217  */
1218 void iwl_irq_handle_error(struct iwl_priv *priv)
1219 {
1220         /* Set the FW error flag -- cleared on iwl_down */
1221         set_bit(STATUS_FW_ERROR, &priv->status);
1222
1223         /* Cancel currently queued command. */
1224         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
1225
1226 #ifdef CONFIG_IWLWIFI_DEBUG
1227         if (priv->debug_level & IWL_DL_FW_ERRORS) {
1228                 iwl_dump_nic_error_log(priv);
1229                 iwl_dump_nic_event_log(priv);
1230                 iwl_print_rx_config_cmd(priv);
1231         }
1232 #endif
1233
1234         wake_up_interruptible(&priv->wait_command_queue);
1235
1236         /* Keep the restart process from trying to send host
1237          * commands by clearing the INIT status bit */
1238         clear_bit(STATUS_READY, &priv->status);
1239
1240         if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1241                 IWL_DEBUG(priv, IWL_DL_FW_ERRORS,
1242                           "Restarting adapter due to uCode error.\n");
1243
1244                 if (priv->cfg->mod_params->restart_fw)
1245                         queue_work(priv->workqueue, &priv->restart);
1246         }
1247 }
1248 EXPORT_SYMBOL(iwl_irq_handle_error);
1249
1250 void iwl_configure_filter(struct ieee80211_hw *hw,
1251                           unsigned int changed_flags,
1252                           unsigned int *total_flags,
1253                           int mc_count, struct dev_addr_list *mc_list)
1254 {
1255         struct iwl_priv *priv = hw->priv;
1256         __le32 *filter_flags = &priv->staging_rxon.filter_flags;
1257
1258         IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
1259                         changed_flags, *total_flags);
1260
1261         if (changed_flags & (FIF_OTHER_BSS | FIF_PROMISC_IN_BSS)) {
1262                 if (*total_flags & (FIF_OTHER_BSS | FIF_PROMISC_IN_BSS))
1263                         *filter_flags |= RXON_FILTER_PROMISC_MSK;
1264                 else
1265                         *filter_flags &= ~RXON_FILTER_PROMISC_MSK;
1266         }
1267         if (changed_flags & FIF_ALLMULTI) {
1268                 if (*total_flags & FIF_ALLMULTI)
1269                         *filter_flags |= RXON_FILTER_ACCEPT_GRP_MSK;
1270                 else
1271                         *filter_flags &= ~RXON_FILTER_ACCEPT_GRP_MSK;
1272         }
1273         if (changed_flags & FIF_CONTROL) {
1274                 if (*total_flags & FIF_CONTROL)
1275                         *filter_flags |= RXON_FILTER_CTL2HOST_MSK;
1276                 else
1277                         *filter_flags &= ~RXON_FILTER_CTL2HOST_MSK;
1278         }
1279         if (changed_flags & FIF_BCN_PRBRESP_PROMISC) {
1280                 if (*total_flags & FIF_BCN_PRBRESP_PROMISC)
1281                         *filter_flags |= RXON_FILTER_BCON_AWARE_MSK;
1282                 else
1283                         *filter_flags &= ~RXON_FILTER_BCON_AWARE_MSK;
1284         }
1285
1286         /* We avoid iwl_commit_rxon here to commit the new filter flags
1287          * since mac80211 will call ieee80211_hw_config immediately.
1288          * (mc_list is not supported at this time). Otherwise, we need to
1289          * queue a background iwl_commit_rxon work.
1290          */
1291
1292         *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
1293                         FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
1294 }
1295 EXPORT_SYMBOL(iwl_configure_filter);
1296
1297 int iwl_setup_mac(struct iwl_priv *priv)
1298 {
1299         int ret;
1300         struct ieee80211_hw *hw = priv->hw;
1301         hw->rate_control_algorithm = "iwl-agn-rs";
1302
1303         /* Tell mac80211 our characteristics */
1304         hw->flags = IEEE80211_HW_SIGNAL_DBM |
1305                     IEEE80211_HW_NOISE_DBM |
1306                     IEEE80211_HW_AMPDU_AGGREGATION |
1307                     IEEE80211_HW_SPECTRUM_MGMT;
1308         hw->wiphy->interface_modes =
1309                 BIT(NL80211_IFTYPE_STATION) |
1310                 BIT(NL80211_IFTYPE_ADHOC);
1311
1312         hw->wiphy->custom_regulatory = true;
1313
1314         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
1315         /* we create the 802.11 header and a zero-length SSID element */
1316         hw->wiphy->max_scan_ie_len = IWL_MAX_PROBE_REQUEST - 24 - 2;
1317
1318         /* Default value; 4 EDCA QOS priorities */
1319         hw->queues = 4;
1320
1321         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
1322
1323         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
1324                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
1325                         &priv->bands[IEEE80211_BAND_2GHZ];
1326         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
1327                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
1328                         &priv->bands[IEEE80211_BAND_5GHZ];
1329
1330         ret = ieee80211_register_hw(priv->hw);
1331         if (ret) {
1332                 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
1333                 return ret;
1334         }
1335         priv->mac80211_registered = 1;
1336
1337         return 0;
1338 }
1339 EXPORT_SYMBOL(iwl_setup_mac);
1340
1341 int iwl_set_hw_params(struct iwl_priv *priv)
1342 {
1343         priv->hw_params.sw_crypto = priv->cfg->mod_params->sw_crypto;
1344         priv->hw_params.max_rxq_size = RX_QUEUE_SIZE;
1345         priv->hw_params.max_rxq_log = RX_QUEUE_SIZE_LOG;
1346         if (priv->cfg->mod_params->amsdu_size_8K)
1347                 priv->hw_params.rx_buf_size = IWL_RX_BUF_SIZE_8K;
1348         else
1349                 priv->hw_params.rx_buf_size = IWL_RX_BUF_SIZE_4K;
1350         priv->hw_params.max_pkt_size = priv->hw_params.rx_buf_size - 256;
1351
1352         if (priv->cfg->mod_params->disable_11n)
1353                 priv->cfg->sku &= ~IWL_SKU_N;
1354
1355         /* Device-specific setup */
1356         return priv->cfg->ops->lib->set_hw_params(priv);
1357 }
1358 EXPORT_SYMBOL(iwl_set_hw_params);
1359
1360 int iwl_init_drv(struct iwl_priv *priv)
1361 {
1362         int ret;
1363
1364         priv->ibss_beacon = NULL;
1365
1366         spin_lock_init(&priv->lock);
1367         spin_lock_init(&priv->sta_lock);
1368         spin_lock_init(&priv->hcmd_lock);
1369
1370         INIT_LIST_HEAD(&priv->free_frames);
1371
1372         mutex_init(&priv->mutex);
1373
1374         /* Clear the driver's (not device's) station table */
1375         priv->cfg->ops->smgmt->clear_station_table(priv);
1376
1377         priv->data_retry_limit = -1;
1378         priv->ieee_channels = NULL;
1379         priv->ieee_rates = NULL;
1380         priv->band = IEEE80211_BAND_2GHZ;
1381
1382         priv->iw_mode = NL80211_IFTYPE_STATION;
1383
1384         priv->current_ht_config.sm_ps = WLAN_HT_CAP_SM_PS_DISABLED;
1385
1386         /* Choose which receivers/antennas to use */
1387         if (priv->cfg->ops->hcmd->set_rxon_chain)
1388                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
1389
1390         iwl_init_scan_params(priv);
1391
1392         iwl_reset_qos(priv);
1393
1394         priv->qos_data.qos_active = 0;
1395         priv->qos_data.qos_cap.val = 0;
1396
1397         priv->rates_mask = IWL_RATES_MASK;
1398         /* If power management is turned on, default to CAM mode */
1399         priv->power_mode = IWL_POWER_MODE_CAM;
1400         priv->tx_power_user_lmt = IWL_TX_POWER_TARGET_POWER_MAX;
1401
1402         ret = iwl_init_channel_map(priv);
1403         if (ret) {
1404                 IWL_ERR(priv, "initializing regulatory failed: %d\n", ret);
1405                 goto err;
1406         }
1407
1408         ret = iwlcore_init_geos(priv);
1409         if (ret) {
1410                 IWL_ERR(priv, "initializing geos failed: %d\n", ret);
1411                 goto err_free_channel_map;
1412         }
1413         iwlcore_init_hw_rates(priv, priv->ieee_rates);
1414
1415         return 0;
1416
1417 err_free_channel_map:
1418         iwl_free_channel_map(priv);
1419 err:
1420         return ret;
1421 }
1422 EXPORT_SYMBOL(iwl_init_drv);
1423
1424 int iwl_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force)
1425 {
1426         int ret = 0;
1427         if (tx_power < IWL_TX_POWER_TARGET_POWER_MIN) {
1428                 IWL_WARN(priv, "Requested user TXPOWER %d below lower limit %d.\n",
1429                          tx_power,
1430                          IWL_TX_POWER_TARGET_POWER_MIN);
1431                 return -EINVAL;
1432         }
1433
1434         if (tx_power > IWL_TX_POWER_TARGET_POWER_MAX) {
1435                 IWL_WARN(priv, "Requested user TXPOWER %d above upper limit %d.\n",
1436                          tx_power,
1437                          IWL_TX_POWER_TARGET_POWER_MAX);
1438                 return -EINVAL;
1439         }
1440
1441         if (priv->tx_power_user_lmt != tx_power)
1442                 force = true;
1443
1444         priv->tx_power_user_lmt = tx_power;
1445
1446         /* if nic is not up don't send command */
1447         if (!iwl_is_ready_rf(priv))
1448                 return ret;
1449
1450         if (force && priv->cfg->ops->lib->send_tx_power)
1451                 ret = priv->cfg->ops->lib->send_tx_power(priv);
1452
1453         return ret;
1454 }
1455 EXPORT_SYMBOL(iwl_set_tx_power);
1456
1457 void iwl_uninit_drv(struct iwl_priv *priv)
1458 {
1459         iwl_calib_free_results(priv);
1460         iwlcore_free_geos(priv);
1461         iwl_free_channel_map(priv);
1462         kfree(priv->scan);
1463 }
1464 EXPORT_SYMBOL(iwl_uninit_drv);
1465
1466
1467 void iwl_disable_interrupts(struct iwl_priv *priv)
1468 {
1469         clear_bit(STATUS_INT_ENABLED, &priv->status);
1470
1471         /* disable interrupts from uCode/NIC to host */
1472         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
1473
1474         /* acknowledge/clear/reset any interrupts still pending
1475          * from uCode or flow handler (Rx/Tx DMA) */
1476         iwl_write32(priv, CSR_INT, 0xffffffff);
1477         iwl_write32(priv, CSR_FH_INT_STATUS, 0xffffffff);
1478         IWL_DEBUG_ISR(priv, "Disabled interrupts\n");
1479 }
1480 EXPORT_SYMBOL(iwl_disable_interrupts);
1481
1482 void iwl_enable_interrupts(struct iwl_priv *priv)
1483 {
1484         IWL_DEBUG_ISR(priv, "Enabling interrupts\n");
1485         set_bit(STATUS_INT_ENABLED, &priv->status);
1486         iwl_write32(priv, CSR_INT_MASK, CSR_INI_SET_MASK);
1487 }
1488 EXPORT_SYMBOL(iwl_enable_interrupts);
1489
1490 irqreturn_t iwl_isr(int irq, void *data)
1491 {
1492         struct iwl_priv *priv = data;
1493         u32 inta, inta_mask;
1494         u32 inta_fh;
1495         if (!priv)
1496                 return IRQ_NONE;
1497
1498         spin_lock(&priv->lock);
1499
1500         /* Disable (but don't clear!) interrupts here to avoid
1501          *    back-to-back ISRs and sporadic interrupts from our NIC.
1502          * If we have something to service, the tasklet will re-enable ints.
1503          * If we *don't* have something, we'll re-enable before leaving here. */
1504         inta_mask = iwl_read32(priv, CSR_INT_MASK);  /* just for debug */
1505         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
1506
1507         /* Discover which interrupts are active/pending */
1508         inta = iwl_read32(priv, CSR_INT);
1509         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1510
1511         /* Ignore interrupt if there's nothing in NIC to service.
1512          * This may be due to IRQ shared with another device,
1513          * or due to sporadic interrupts thrown from our NIC. */
1514         if (!inta && !inta_fh) {
1515                 IWL_DEBUG_ISR(priv, "Ignore interrupt, inta == 0, inta_fh == 0\n");
1516                 goto none;
1517         }
1518
1519         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
1520                 /* Hardware disappeared. It might have already raised
1521                  * an interrupt */
1522                 IWL_WARN(priv, "HARDWARE GONE?? INTA == 0x%08x\n", inta);
1523                 goto unplugged;
1524         }
1525
1526         IWL_DEBUG_ISR(priv, "ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1527                       inta, inta_mask, inta_fh);
1528
1529         inta &= ~CSR_INT_BIT_SCD;
1530
1531         /* iwl_irq_tasklet() will service interrupts and re-enable them */
1532         if (likely(inta || inta_fh))
1533                 tasklet_schedule(&priv->irq_tasklet);
1534
1535  unplugged:
1536         spin_unlock(&priv->lock);
1537         return IRQ_HANDLED;
1538
1539  none:
1540         /* re-enable interrupts here since we don't have anything to service. */
1541         /* only Re-enable if diabled by irq */
1542         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1543                 iwl_enable_interrupts(priv);
1544         spin_unlock(&priv->lock);
1545         return IRQ_NONE;
1546 }
1547 EXPORT_SYMBOL(iwl_isr);
1548
1549 int iwl_send_bt_config(struct iwl_priv *priv)
1550 {
1551         struct iwl_bt_cmd bt_cmd = {
1552                 .flags = 3,
1553                 .lead_time = 0xAA,
1554                 .max_kill = 1,
1555                 .kill_ack_mask = 0,
1556                 .kill_cts_mask = 0,
1557         };
1558
1559         return iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG,
1560                                 sizeof(struct iwl_bt_cmd), &bt_cmd);
1561 }
1562 EXPORT_SYMBOL(iwl_send_bt_config);
1563
1564 int iwl_send_statistics_request(struct iwl_priv *priv, u8 flags)
1565 {
1566         u32 stat_flags = 0;
1567         struct iwl_host_cmd cmd = {
1568                 .id = REPLY_STATISTICS_CMD,
1569                 .meta.flags = flags,
1570                 .len = sizeof(stat_flags),
1571                 .data = (u8 *) &stat_flags,
1572         };
1573         return iwl_send_cmd(priv, &cmd);
1574 }
1575 EXPORT_SYMBOL(iwl_send_statistics_request);
1576
1577 /**
1578  * iwl_verify_inst_sparse - verify runtime uCode image in card vs. host,
1579  *   using sample data 100 bytes apart.  If these sample points are good,
1580  *   it's a pretty good bet that everything between them is good, too.
1581  */
1582 static int iwlcore_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
1583 {
1584         u32 val;
1585         int ret = 0;
1586         u32 errcnt = 0;
1587         u32 i;
1588
1589         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
1590
1591         ret = iwl_grab_nic_access(priv);
1592         if (ret)
1593                 return ret;
1594
1595         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
1596                 /* read data comes through single port, auto-incr addr */
1597                 /* NOTE: Use the debugless read so we don't flood kernel log
1598                  * if IWL_DL_IO is set */
1599                 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
1600                         i + IWL49_RTC_INST_LOWER_BOUND);
1601                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1602                 if (val != le32_to_cpu(*image)) {
1603                         ret = -EIO;
1604                         errcnt++;
1605                         if (errcnt >= 3)
1606                                 break;
1607                 }
1608         }
1609
1610         iwl_release_nic_access(priv);
1611
1612         return ret;
1613 }
1614
1615 /**
1616  * iwlcore_verify_inst_full - verify runtime uCode image in card vs. host,
1617  *     looking at all data.
1618  */
1619 static int iwl_verify_inst_full(struct iwl_priv *priv, __le32 *image,
1620                                  u32 len)
1621 {
1622         u32 val;
1623         u32 save_len = len;
1624         int ret = 0;
1625         u32 errcnt;
1626
1627         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
1628
1629         ret = iwl_grab_nic_access(priv);
1630         if (ret)
1631                 return ret;
1632
1633         iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
1634                            IWL49_RTC_INST_LOWER_BOUND);
1635
1636         errcnt = 0;
1637         for (; len > 0; len -= sizeof(u32), image++) {
1638                 /* read data comes through single port, auto-incr addr */
1639                 /* NOTE: Use the debugless read so we don't flood kernel log
1640                  * if IWL_DL_IO is set */
1641                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1642                 if (val != le32_to_cpu(*image)) {
1643                         IWL_ERR(priv, "uCode INST section is invalid at "
1644                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
1645                                   save_len - len, val, le32_to_cpu(*image));
1646                         ret = -EIO;
1647                         errcnt++;
1648                         if (errcnt >= 20)
1649                                 break;
1650                 }
1651         }
1652
1653         iwl_release_nic_access(priv);
1654
1655         if (!errcnt)
1656                 IWL_DEBUG_INFO(priv,
1657                     "ucode image in INSTRUCTION memory is good\n");
1658
1659         return ret;
1660 }
1661
1662 /**
1663  * iwl_verify_ucode - determine which instruction image is in SRAM,
1664  *    and verify its contents
1665  */
1666 int iwl_verify_ucode(struct iwl_priv *priv)
1667 {
1668         __le32 *image;
1669         u32 len;
1670         int ret;
1671
1672         /* Try bootstrap */
1673         image = (__le32 *)priv->ucode_boot.v_addr;
1674         len = priv->ucode_boot.len;
1675         ret = iwlcore_verify_inst_sparse(priv, image, len);
1676         if (!ret) {
1677                 IWL_DEBUG_INFO(priv, "Bootstrap uCode is good in inst SRAM\n");
1678                 return 0;
1679         }
1680
1681         /* Try initialize */
1682         image = (__le32 *)priv->ucode_init.v_addr;
1683         len = priv->ucode_init.len;
1684         ret = iwlcore_verify_inst_sparse(priv, image, len);
1685         if (!ret) {
1686                 IWL_DEBUG_INFO(priv, "Initialize uCode is good in inst SRAM\n");
1687                 return 0;
1688         }
1689
1690         /* Try runtime/protocol */
1691         image = (__le32 *)priv->ucode_code.v_addr;
1692         len = priv->ucode_code.len;
1693         ret = iwlcore_verify_inst_sparse(priv, image, len);
1694         if (!ret) {
1695                 IWL_DEBUG_INFO(priv, "Runtime uCode is good in inst SRAM\n");
1696                 return 0;
1697         }
1698
1699         IWL_ERR(priv, "NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
1700
1701         /* Since nothing seems to match, show first several data entries in
1702          * instruction SRAM, so maybe visual inspection will give a clue.
1703          * Selection of bootstrap image (vs. other images) is arbitrary. */
1704         image = (__le32 *)priv->ucode_boot.v_addr;
1705         len = priv->ucode_boot.len;
1706         ret = iwl_verify_inst_full(priv, image, len);
1707
1708         return ret;
1709 }
1710 EXPORT_SYMBOL(iwl_verify_ucode);
1711
1712
1713 static const char *desc_lookup_text[] = {
1714         "OK",
1715         "FAIL",
1716         "BAD_PARAM",
1717         "BAD_CHECKSUM",
1718         "NMI_INTERRUPT_WDG",
1719         "SYSASSERT",
1720         "FATAL_ERROR",
1721         "BAD_COMMAND",
1722         "HW_ERROR_TUNE_LOCK",
1723         "HW_ERROR_TEMPERATURE",
1724         "ILLEGAL_CHAN_FREQ",
1725         "VCC_NOT_STABLE",
1726         "FH_ERROR",
1727         "NMI_INTERRUPT_HOST",
1728         "NMI_INTERRUPT_ACTION_PT",
1729         "NMI_INTERRUPT_UNKNOWN",
1730         "UCODE_VERSION_MISMATCH",
1731         "HW_ERROR_ABS_LOCK",
1732         "HW_ERROR_CAL_LOCK_FAIL",
1733         "NMI_INTERRUPT_INST_ACTION_PT",
1734         "NMI_INTERRUPT_DATA_ACTION_PT",
1735         "NMI_TRM_HW_ER",
1736         "NMI_INTERRUPT_TRM",
1737         "NMI_INTERRUPT_BREAK_POINT"
1738         "DEBUG_0",
1739         "DEBUG_1",
1740         "DEBUG_2",
1741         "DEBUG_3",
1742         "UNKNOWN"
1743 };
1744
1745 static const char *desc_lookup(int i)
1746 {
1747         int max = ARRAY_SIZE(desc_lookup_text) - 1;
1748
1749         if (i < 0 || i > max)
1750                 i = max;
1751
1752         return desc_lookup_text[i];
1753 }
1754
1755 #define ERROR_START_OFFSET  (1 * sizeof(u32))
1756 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
1757
1758 void iwl_dump_nic_error_log(struct iwl_priv *priv)
1759 {
1760         u32 data2, line;
1761         u32 desc, time, count, base, data1;
1762         u32 blink1, blink2, ilink1, ilink2;
1763         int ret;
1764
1765         if (priv->ucode_type == UCODE_INIT)
1766                 base = le32_to_cpu(priv->card_alive_init.error_event_table_ptr);
1767         else
1768                 base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
1769
1770         if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
1771                 IWL_ERR(priv, "Not valid error log pointer 0x%08X\n", base);
1772                 return;
1773         }
1774
1775         ret = iwl_grab_nic_access(priv);
1776         if (ret) {
1777                 IWL_WARN(priv, "Can not read from adapter at this time.\n");
1778                 return;
1779         }
1780
1781         count = iwl_read_targ_mem(priv, base);
1782
1783         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
1784                 IWL_ERR(priv, "Start IWL Error Log Dump:\n");
1785                 IWL_ERR(priv, "Status: 0x%08lX, count: %d\n",
1786                         priv->status, count);
1787         }
1788
1789         desc = iwl_read_targ_mem(priv, base + 1 * sizeof(u32));
1790         blink1 = iwl_read_targ_mem(priv, base + 3 * sizeof(u32));
1791         blink2 = iwl_read_targ_mem(priv, base + 4 * sizeof(u32));
1792         ilink1 = iwl_read_targ_mem(priv, base + 5 * sizeof(u32));
1793         ilink2 = iwl_read_targ_mem(priv, base + 6 * sizeof(u32));
1794         data1 = iwl_read_targ_mem(priv, base + 7 * sizeof(u32));
1795         data2 = iwl_read_targ_mem(priv, base + 8 * sizeof(u32));
1796         line = iwl_read_targ_mem(priv, base + 9 * sizeof(u32));
1797         time = iwl_read_targ_mem(priv, base + 11 * sizeof(u32));
1798
1799         IWL_ERR(priv, "Desc                               Time       "
1800                 "data1      data2      line\n");
1801         IWL_ERR(priv, "%-28s (#%02d) %010u 0x%08X 0x%08X %u\n",
1802                 desc_lookup(desc), desc, time, data1, data2, line);
1803         IWL_ERR(priv, "blink1  blink2  ilink1  ilink2\n");
1804         IWL_ERR(priv, "0x%05X 0x%05X 0x%05X 0x%05X\n", blink1, blink2,
1805                 ilink1, ilink2);
1806
1807         iwl_release_nic_access(priv);
1808 }
1809 EXPORT_SYMBOL(iwl_dump_nic_error_log);
1810
1811 #define EVENT_START_OFFSET  (4 * sizeof(u32))
1812
1813 /**
1814  * iwl_print_event_log - Dump error event log to syslog
1815  *
1816  * NOTE: Must be called with iwl_grab_nic_access() already obtained!
1817  */
1818 static void iwl_print_event_log(struct iwl_priv *priv, u32 start_idx,
1819                                 u32 num_events, u32 mode)
1820 {
1821         u32 i;
1822         u32 base;       /* SRAM byte address of event log header */
1823         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
1824         u32 ptr;        /* SRAM byte address of log data */
1825         u32 ev, time, data; /* event log data */
1826
1827         if (num_events == 0)
1828                 return;
1829         if (priv->ucode_type == UCODE_INIT)
1830                 base = le32_to_cpu(priv->card_alive_init.log_event_table_ptr);
1831         else
1832                 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1833
1834         if (mode == 0)
1835                 event_size = 2 * sizeof(u32);
1836         else
1837                 event_size = 3 * sizeof(u32);
1838
1839         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
1840
1841         /* "time" is actually "data" for mode 0 (no timestamp).
1842         * place event id # at far right for easier visual parsing. */
1843         for (i = 0; i < num_events; i++) {
1844                 ev = iwl_read_targ_mem(priv, ptr);
1845                 ptr += sizeof(u32);
1846                 time = iwl_read_targ_mem(priv, ptr);
1847                 ptr += sizeof(u32);
1848                 if (mode == 0) {
1849                         /* data, ev */
1850                         IWL_ERR(priv, "EVT_LOG:0x%08x:%04u\n", time, ev);
1851                 } else {
1852                         data = iwl_read_targ_mem(priv, ptr);
1853                         ptr += sizeof(u32);
1854                         IWL_ERR(priv, "EVT_LOGT:%010u:0x%08x:%04u\n",
1855                                         time, data, ev);
1856                 }
1857         }
1858 }
1859
1860 void iwl_dump_nic_event_log(struct iwl_priv *priv)
1861 {
1862         int ret;
1863         u32 base;       /* SRAM byte address of event log header */
1864         u32 capacity;   /* event log capacity in # entries */
1865         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
1866         u32 num_wraps;  /* # times uCode wrapped to top of log */
1867         u32 next_entry; /* index of next entry to be written by uCode */
1868         u32 size;       /* # entries that we'll print */
1869
1870         if (priv->ucode_type == UCODE_INIT)
1871                 base = le32_to_cpu(priv->card_alive_init.log_event_table_ptr);
1872         else
1873                 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1874
1875         if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
1876                 IWL_ERR(priv, "Invalid event log pointer 0x%08X\n", base);
1877                 return;
1878         }
1879
1880         ret = iwl_grab_nic_access(priv);
1881         if (ret) {
1882                 IWL_WARN(priv, "Can not read from adapter at this time.\n");
1883                 return;
1884         }
1885
1886         /* event log header */
1887         capacity = iwl_read_targ_mem(priv, base);
1888         mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
1889         num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
1890         next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
1891
1892         size = num_wraps ? capacity : next_entry;
1893
1894         /* bail out if nothing in log */
1895         if (size == 0) {
1896                 IWL_ERR(priv, "Start IWL Event Log Dump: nothing in log\n");
1897                 iwl_release_nic_access(priv);
1898                 return;
1899         }
1900
1901         IWL_ERR(priv, "Start IWL Event Log Dump: display count %d, wraps %d\n",
1902                         size, num_wraps);
1903
1904         /* if uCode has wrapped back to top of log, start at the oldest entry,
1905          * i.e the next one that uCode would fill. */
1906         if (num_wraps)
1907                 iwl_print_event_log(priv, next_entry,
1908                                         capacity - next_entry, mode);
1909         /* (then/else) start at top of log */
1910         iwl_print_event_log(priv, 0, next_entry, mode);
1911
1912         iwl_release_nic_access(priv);
1913 }
1914 EXPORT_SYMBOL(iwl_dump_nic_event_log);
1915
1916 void iwl_rf_kill_ct_config(struct iwl_priv *priv)
1917 {
1918         struct iwl_ct_kill_config cmd;
1919         unsigned long flags;
1920         int ret = 0;
1921
1922         spin_lock_irqsave(&priv->lock, flags);
1923         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
1924                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
1925         spin_unlock_irqrestore(&priv->lock, flags);
1926
1927         cmd.critical_temperature_R =
1928                 cpu_to_le32(priv->hw_params.ct_kill_threshold);
1929
1930         ret = iwl_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD,
1931                                sizeof(cmd), &cmd);
1932         if (ret)
1933                 IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
1934         else
1935                 IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD succeeded, "
1936                         "critical temperature is %d\n",
1937                         cmd.critical_temperature_R);
1938 }
1939 EXPORT_SYMBOL(iwl_rf_kill_ct_config);
1940
1941
1942 /*
1943  * CARD_STATE_CMD
1944  *
1945  * Use: Sets the device's internal card state to enable, disable, or halt
1946  *
1947  * When in the 'enable' state the card operates as normal.
1948  * When in the 'disable' state, the card enters into a low power mode.
1949  * When in the 'halt' state, the card is shut down and must be fully
1950  * restarted to come back on.
1951  */
1952 int iwl_send_card_state(struct iwl_priv *priv, u32 flags, u8 meta_flag)
1953 {
1954         struct iwl_host_cmd cmd = {
1955                 .id = REPLY_CARD_STATE_CMD,
1956                 .len = sizeof(u32),
1957                 .data = &flags,
1958                 .meta.flags = meta_flag,
1959         };
1960
1961         return iwl_send_cmd(priv, &cmd);
1962 }
1963 EXPORT_SYMBOL(iwl_send_card_state);
1964
1965 void iwl_radio_kill_sw_disable_radio(struct iwl_priv *priv)
1966 {
1967         unsigned long flags;
1968
1969         if (test_bit(STATUS_RF_KILL_SW, &priv->status))
1970                 return;
1971
1972         IWL_DEBUG_RF_KILL(priv, "Manual SW RF KILL set to: RADIO OFF\n");
1973
1974         iwl_scan_cancel(priv);
1975         /* FIXME: This is a workaround for AP */
1976         if (priv->iw_mode != NL80211_IFTYPE_AP) {
1977                 spin_lock_irqsave(&priv->lock, flags);
1978                 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
1979                             CSR_UCODE_SW_BIT_RFKILL);
1980                 spin_unlock_irqrestore(&priv->lock, flags);
1981                 /* call the host command only if no hw rf-kill set */
1982                 if (!test_bit(STATUS_RF_KILL_HW, &priv->status) &&
1983                     iwl_is_ready(priv))
1984                         iwl_send_card_state(priv,
1985                                 CARD_STATE_CMD_DISABLE, 0);
1986                 set_bit(STATUS_RF_KILL_SW, &priv->status);
1987                         /* make sure mac80211 stop sending Tx frame */
1988                 if (priv->mac80211_registered)
1989                         ieee80211_stop_queues(priv->hw);
1990         }
1991 }
1992 EXPORT_SYMBOL(iwl_radio_kill_sw_disable_radio);
1993
1994 int iwl_radio_kill_sw_enable_radio(struct iwl_priv *priv)
1995 {
1996         unsigned long flags;
1997
1998         if (!test_bit(STATUS_RF_KILL_SW, &priv->status))
1999                 return 0;
2000
2001         IWL_DEBUG_RF_KILL(priv, "Manual SW RF KILL set to: RADIO ON\n");
2002
2003         spin_lock_irqsave(&priv->lock, flags);
2004         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2005
2006         /* If the driver is up it will receive CARD_STATE_NOTIFICATION
2007          * notification where it will clear SW rfkill status.
2008          * Setting it here would break the handler. Only if the
2009          * interface is down we can set here since we don't
2010          * receive any further notification.
2011          */
2012         if (!priv->is_open)
2013                 clear_bit(STATUS_RF_KILL_SW, &priv->status);
2014         spin_unlock_irqrestore(&priv->lock, flags);
2015
2016         /* wake up ucode */
2017         msleep(10);
2018
2019         spin_lock_irqsave(&priv->lock, flags);
2020         iwl_read32(priv, CSR_UCODE_DRV_GP1);
2021         if (!iwl_grab_nic_access(priv))
2022                 iwl_release_nic_access(priv);
2023         spin_unlock_irqrestore(&priv->lock, flags);
2024
2025         if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
2026                 IWL_DEBUG_RF_KILL(priv, "Can not turn radio back on - "
2027                                   "disabled by HW switch\n");
2028                 return 0;
2029         }
2030
2031         /* when driver is up while rfkill is on, it wont receive
2032          * any CARD_STATE_NOTIFICATION notifications so we have to
2033          * restart it in here
2034          */
2035         if (priv->is_open && !test_bit(STATUS_ALIVE, &priv->status)) {
2036                 clear_bit(STATUS_RF_KILL_SW, &priv->status);
2037                 if (!iwl_is_rfkill(priv))
2038                         queue_work(priv->workqueue, &priv->up);
2039         }
2040
2041         /* If the driver is already loaded, it will receive
2042          * CARD_STATE_NOTIFICATION notifications and the handler will
2043          * call restart to reload the driver.
2044          */
2045         return 1;
2046 }
2047 EXPORT_SYMBOL(iwl_radio_kill_sw_enable_radio);
2048
2049 void iwl_bg_rf_kill(struct work_struct *work)
2050 {
2051         struct iwl_priv *priv = container_of(work, struct iwl_priv, rf_kill);
2052
2053         wake_up_interruptible(&priv->wait_command_queue);
2054
2055         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2056                 return;
2057
2058         mutex_lock(&priv->mutex);
2059
2060         if (!iwl_is_rfkill(priv)) {
2061                 IWL_DEBUG_RF_KILL(priv,
2062                           "HW and/or SW RF Kill no longer active, restarting "
2063                           "device\n");
2064                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status) &&
2065                     priv->is_open)
2066                         queue_work(priv->workqueue, &priv->restart);
2067         } else {
2068                 /* make sure mac80211 stop sending Tx frame */
2069                 if (priv->mac80211_registered)
2070                         ieee80211_stop_queues(priv->hw);
2071
2072                 if (!test_bit(STATUS_RF_KILL_HW, &priv->status))
2073                         IWL_DEBUG_RF_KILL(priv, "Can not turn radio back on - "
2074                                           "disabled by SW switch\n");
2075                 else
2076                         IWL_WARN(priv, "Radio Frequency Kill Switch is On:\n"
2077                                     "Kill switch must be turned off for "
2078                                     "wireless networking to work.\n");
2079         }
2080         mutex_unlock(&priv->mutex);
2081         iwl_rfkill_set_hw_state(priv);
2082 }
2083 EXPORT_SYMBOL(iwl_bg_rf_kill);
2084
2085 void iwl_rx_pm_sleep_notif(struct iwl_priv *priv,
2086                            struct iwl_rx_mem_buffer *rxb)
2087 {
2088 #ifdef CONFIG_IWLWIFI_DEBUG
2089         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2090         struct iwl_sleep_notification *sleep = &(pkt->u.sleep_notif);
2091         IWL_DEBUG_RX(priv, "sleep mode: %d, src: %d\n",
2092                      sleep->pm_sleep_mode, sleep->pm_wakeup_src);
2093 #endif
2094 }
2095 EXPORT_SYMBOL(iwl_rx_pm_sleep_notif);
2096
2097 void iwl_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
2098                                       struct iwl_rx_mem_buffer *rxb)
2099 {
2100         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2101         IWL_DEBUG_RADIO(priv, "Dumping %d bytes of unhandled "
2102                         "notification for %s:\n",
2103                         le32_to_cpu(pkt->len), get_cmd_string(pkt->hdr.cmd));
2104         iwl_print_hex_dump(priv, IWL_DL_RADIO, pkt->u.raw, le32_to_cpu(pkt->len));
2105 }
2106 EXPORT_SYMBOL(iwl_rx_pm_debug_statistics_notif);
2107
2108 void iwl_rx_reply_error(struct iwl_priv *priv,
2109                         struct iwl_rx_mem_buffer *rxb)
2110 {
2111         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2112
2113         IWL_ERR(priv, "Error Reply type 0x%08X cmd %s (0x%02X) "
2114                 "seq 0x%04X ser 0x%08X\n",
2115                 le32_to_cpu(pkt->u.err_resp.error_type),
2116                 get_cmd_string(pkt->u.err_resp.cmd_id),
2117                 pkt->u.err_resp.cmd_id,
2118                 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
2119                 le32_to_cpu(pkt->u.err_resp.error_info));
2120 }
2121 EXPORT_SYMBOL(iwl_rx_reply_error);
2122
2123 void iwl_clear_isr_stats(struct iwl_priv *priv)
2124 {
2125         memset(&priv->isr_stats, 0, sizeof(priv->isr_stats));
2126 }
2127 EXPORT_SYMBOL(iwl_clear_isr_stats);
2128
2129 int iwl_mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
2130                            const struct ieee80211_tx_queue_params *params)
2131 {
2132         struct iwl_priv *priv = hw->priv;
2133         unsigned long flags;
2134         int q;
2135
2136         IWL_DEBUG_MAC80211(priv, "enter\n");
2137
2138         if (!iwl_is_ready_rf(priv)) {
2139                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
2140                 return -EIO;
2141         }
2142
2143         if (queue >= AC_NUM) {
2144                 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
2145                 return 0;
2146         }
2147
2148         q = AC_NUM - 1 - queue;
2149
2150         spin_lock_irqsave(&priv->lock, flags);
2151
2152         priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
2153         priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
2154         priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
2155         priv->qos_data.def_qos_parm.ac[q].edca_txop =
2156                         cpu_to_le16((params->txop * 32));
2157
2158         priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
2159         priv->qos_data.qos_active = 1;
2160
2161         if (priv->iw_mode == NL80211_IFTYPE_AP)
2162                 iwl_activate_qos(priv, 1);
2163         else if (priv->assoc_id && iwl_is_associated(priv))
2164                 iwl_activate_qos(priv, 0);
2165
2166         spin_unlock_irqrestore(&priv->lock, flags);
2167
2168         IWL_DEBUG_MAC80211(priv, "leave\n");
2169         return 0;
2170 }
2171 EXPORT_SYMBOL(iwl_mac_conf_tx);
2172
2173 static void iwl_ht_conf(struct iwl_priv *priv,
2174                             struct ieee80211_bss_conf *bss_conf)
2175 {
2176         struct ieee80211_sta_ht_cap *ht_conf;
2177         struct iwl_ht_info *iwl_conf = &priv->current_ht_config;
2178         struct ieee80211_sta *sta;
2179
2180         IWL_DEBUG_MAC80211(priv, "enter: \n");
2181
2182         if (!iwl_conf->is_ht)
2183                 return;
2184
2185
2186         /*
2187          * It is totally wrong to base global information on something
2188          * that is valid only when associated, alas, this driver works
2189          * that way and I don't know how to fix it.
2190          */
2191
2192         rcu_read_lock();
2193         sta = ieee80211_find_sta(priv->hw, priv->bssid);
2194         if (!sta) {
2195                 rcu_read_unlock();
2196                 return;
2197         }
2198         ht_conf = &sta->ht_cap;
2199
2200         if (ht_conf->cap & IEEE80211_HT_CAP_SGI_20)
2201                 iwl_conf->sgf |= HT_SHORT_GI_20MHZ;
2202         if (ht_conf->cap & IEEE80211_HT_CAP_SGI_40)
2203                 iwl_conf->sgf |= HT_SHORT_GI_40MHZ;
2204
2205         iwl_conf->is_green_field = !!(ht_conf->cap & IEEE80211_HT_CAP_GRN_FLD);
2206         iwl_conf->max_amsdu_size =
2207                 !!(ht_conf->cap & IEEE80211_HT_CAP_MAX_AMSDU);
2208
2209         iwl_conf->supported_chan_width =
2210                 !!(ht_conf->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40);
2211
2212         /*
2213          * XXX: The HT configuration needs to be moved into iwl_mac_config()
2214          *      to be done there correctly.
2215          */
2216
2217         iwl_conf->extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE;
2218         if (conf_is_ht40_minus(&priv->hw->conf))
2219                 iwl_conf->extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2220         else if (conf_is_ht40_plus(&priv->hw->conf))
2221                 iwl_conf->extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2222
2223         /* If no above or below channel supplied disable FAT channel */
2224         if (iwl_conf->extension_chan_offset != IEEE80211_HT_PARAM_CHA_SEC_ABOVE &&
2225             iwl_conf->extension_chan_offset != IEEE80211_HT_PARAM_CHA_SEC_BELOW)
2226                 iwl_conf->supported_chan_width = 0;
2227
2228         iwl_conf->sm_ps = (u8)((ht_conf->cap & IEEE80211_HT_CAP_SM_PS) >> 2);
2229
2230         memcpy(&iwl_conf->mcs, &ht_conf->mcs, 16);
2231
2232         iwl_conf->tx_chan_width = iwl_conf->supported_chan_width != 0;
2233         iwl_conf->ht_protection =
2234                 bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_PROTECTION;
2235         iwl_conf->non_GF_STA_present =
2236                 !!(bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
2237
2238         rcu_read_unlock();
2239
2240         IWL_DEBUG_MAC80211(priv, "leave\n");
2241 }
2242
2243 #define IWL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6)
2244 void iwl_bss_info_changed(struct ieee80211_hw *hw,
2245                           struct ieee80211_vif *vif,
2246                           struct ieee80211_bss_conf *bss_conf,
2247                           u32 changes)
2248 {
2249         struct iwl_priv *priv = hw->priv;
2250         int ret;
2251
2252         IWL_DEBUG_MAC80211(priv, "changes = 0x%X\n", changes);
2253
2254         if (!iwl_is_alive(priv))
2255                 return;
2256
2257         mutex_lock(&priv->mutex);
2258
2259         if (changes & BSS_CHANGED_BEACON &&
2260             priv->iw_mode == NL80211_IFTYPE_AP) {
2261                 dev_kfree_skb(priv->ibss_beacon);
2262                 priv->ibss_beacon = ieee80211_beacon_get(hw, vif);
2263         }
2264
2265         if ((changes & BSS_CHANGED_BSSID) && !iwl_is_rfkill(priv)) {
2266                 /* If there is currently a HW scan going on in the background
2267                  * then we need to cancel it else the RXON below will fail. */
2268                 if (iwl_scan_cancel_timeout(priv, 100)) {
2269                         IWL_WARN(priv, "Aborted scan still in progress "
2270                                     "after 100ms\n");
2271                         IWL_DEBUG_MAC80211(priv, "leaving - scan abort failed.\n");
2272                         mutex_unlock(&priv->mutex);
2273                         return;
2274                 }
2275                 memcpy(priv->staging_rxon.bssid_addr,
2276                        bss_conf->bssid, ETH_ALEN);
2277
2278                 /* TODO: Audit driver for usage of these members and see
2279                  * if mac80211 deprecates them (priv->bssid looks like it
2280                  * shouldn't be there, but I haven't scanned the IBSS code
2281                  * to verify) - jpk */
2282                 memcpy(priv->bssid, bss_conf->bssid, ETH_ALEN);
2283
2284                 if (priv->iw_mode == NL80211_IFTYPE_AP)
2285                         iwlcore_config_ap(priv);
2286                 else {
2287                         int rc = iwlcore_commit_rxon(priv);
2288                         if ((priv->iw_mode == NL80211_IFTYPE_STATION) && rc)
2289                                 iwl_rxon_add_station(
2290                                         priv, priv->active_rxon.bssid_addr, 1);
2291                 }
2292         } else if (!iwl_is_rfkill(priv)) {
2293                 iwl_scan_cancel_timeout(priv, 100);
2294                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2295                 iwlcore_commit_rxon(priv);
2296         }
2297
2298         if (priv->iw_mode == NL80211_IFTYPE_ADHOC &&
2299             changes & BSS_CHANGED_BEACON) {
2300                 struct sk_buff *beacon = ieee80211_beacon_get(hw, vif);
2301
2302                 if (beacon)
2303                         iwl_mac_beacon_update(hw, beacon);
2304         }
2305
2306         mutex_unlock(&priv->mutex);
2307
2308         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
2309                 IWL_DEBUG_MAC80211(priv, "ERP_PREAMBLE %d\n",
2310                                    bss_conf->use_short_preamble);
2311                 if (bss_conf->use_short_preamble)
2312                         priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2313                 else
2314                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2315         }
2316
2317         if (changes & BSS_CHANGED_ERP_CTS_PROT) {
2318                 IWL_DEBUG_MAC80211(priv, "ERP_CTS %d\n", bss_conf->use_cts_prot);
2319                 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
2320                         priv->staging_rxon.flags |= RXON_FLG_TGG_PROTECT_MSK;
2321                 else
2322                         priv->staging_rxon.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
2323         }
2324
2325         if (changes & BSS_CHANGED_HT) {
2326                 iwl_ht_conf(priv, bss_conf);
2327
2328                 if (priv->cfg->ops->hcmd->set_rxon_chain)
2329                         priv->cfg->ops->hcmd->set_rxon_chain(priv);
2330         }
2331
2332         if (changes & BSS_CHANGED_ASSOC) {
2333                 IWL_DEBUG_MAC80211(priv, "ASSOC %d\n", bss_conf->assoc);
2334                 /* This should never happen as this function should
2335                  * never be called from interrupt context. */
2336                 if (WARN_ON_ONCE(in_interrupt()))
2337                         return;
2338                 if (bss_conf->assoc) {
2339                         priv->assoc_id = bss_conf->aid;
2340                         priv->beacon_int = bss_conf->beacon_int;
2341                         priv->power_data.dtim_period = bss_conf->dtim_period;
2342                         priv->timestamp = bss_conf->timestamp;
2343                         priv->assoc_capability = bss_conf->assoc_capability;
2344
2345                         /* we have just associated, don't start scan too early
2346                          * leave time for EAPOL exchange to complete
2347                          */
2348                         priv->next_scan_jiffies = jiffies +
2349                                         IWL_DELAY_NEXT_SCAN_AFTER_ASSOC;
2350                         mutex_lock(&priv->mutex);
2351                         priv->cfg->ops->lib->post_associate(priv);
2352                         mutex_unlock(&priv->mutex);
2353                 } else {
2354                         priv->assoc_id = 0;
2355                         IWL_DEBUG_MAC80211(priv, "DISASSOC %d\n", bss_conf->assoc);
2356                 }
2357         } else if (changes && iwl_is_associated(priv) && priv->assoc_id) {
2358                         IWL_DEBUG_MAC80211(priv, "Associated Changes %d\n", changes);
2359                         ret = iwl_send_rxon_assoc(priv);
2360                         if (!ret)
2361                                 /* Sync active_rxon with latest change. */
2362                                 memcpy((void *)&priv->active_rxon,
2363                                         &priv->staging_rxon,
2364                                         sizeof(struct iwl_rxon_cmd));
2365         }
2366         IWL_DEBUG_MAC80211(priv, "leave\n");
2367 }
2368 EXPORT_SYMBOL(iwl_bss_info_changed);
2369
2370 int iwl_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb)
2371 {
2372         struct iwl_priv *priv = hw->priv;
2373         unsigned long flags;
2374         __le64 timestamp;
2375
2376         IWL_DEBUG_MAC80211(priv, "enter\n");
2377
2378         if (!iwl_is_ready_rf(priv)) {
2379                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
2380                 return -EIO;
2381         }
2382
2383         if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
2384                 IWL_DEBUG_MAC80211(priv, "leave - not IBSS\n");
2385                 return -EIO;
2386         }
2387
2388         spin_lock_irqsave(&priv->lock, flags);
2389
2390         if (priv->ibss_beacon)
2391                 dev_kfree_skb(priv->ibss_beacon);
2392
2393         priv->ibss_beacon = skb;
2394
2395         priv->assoc_id = 0;
2396         timestamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
2397         priv->timestamp = le64_to_cpu(timestamp);
2398
2399         IWL_DEBUG_MAC80211(priv, "leave\n");
2400         spin_unlock_irqrestore(&priv->lock, flags);
2401
2402         iwl_reset_qos(priv);
2403
2404         priv->cfg->ops->lib->post_associate(priv);
2405
2406
2407         return 0;
2408 }
2409 EXPORT_SYMBOL(iwl_mac_beacon_update);
2410
2411 int iwl_set_mode(struct iwl_priv *priv, int mode)
2412 {
2413         if (mode == NL80211_IFTYPE_ADHOC) {
2414                 const struct iwl_channel_info *ch_info;
2415
2416                 ch_info = iwl_get_channel_info(priv,
2417                         priv->band,
2418                         le16_to_cpu(priv->staging_rxon.channel));
2419
2420                 if (!ch_info || !is_channel_ibss(ch_info)) {
2421                         IWL_ERR(priv, "channel %d not IBSS channel\n",
2422                                   le16_to_cpu(priv->staging_rxon.channel));
2423                         return -EINVAL;
2424                 }
2425         }
2426
2427         iwl_connection_init_rx_config(priv, mode);
2428
2429         if (priv->cfg->ops->hcmd->set_rxon_chain)
2430                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
2431
2432         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2433
2434         priv->cfg->ops->smgmt->clear_station_table(priv);
2435
2436         /* dont commit rxon if rf-kill is on*/
2437         if (!iwl_is_ready_rf(priv))
2438                 return -EAGAIN;
2439
2440         cancel_delayed_work(&priv->scan_check);
2441         if (iwl_scan_cancel_timeout(priv, 100)) {
2442                 IWL_WARN(priv, "Aborted scan still in progress after 100ms\n");
2443                 IWL_DEBUG_MAC80211(priv, "leaving - scan abort failed.\n");
2444                 return -EAGAIN;
2445         }
2446
2447         iwlcore_commit_rxon(priv);
2448
2449         return 0;
2450 }
2451 EXPORT_SYMBOL(iwl_set_mode);
2452
2453 int iwl_mac_add_interface(struct ieee80211_hw *hw,
2454                                  struct ieee80211_if_init_conf *conf)
2455 {
2456         struct iwl_priv *priv = hw->priv;
2457         unsigned long flags;
2458
2459         IWL_DEBUG_MAC80211(priv, "enter: type %d\n", conf->type);
2460
2461         if (priv->vif) {
2462                 IWL_DEBUG_MAC80211(priv, "leave - vif != NULL\n");
2463                 return -EOPNOTSUPP;
2464         }
2465
2466         spin_lock_irqsave(&priv->lock, flags);
2467         priv->vif = conf->vif;
2468         priv->iw_mode = conf->type;
2469
2470         spin_unlock_irqrestore(&priv->lock, flags);
2471
2472         mutex_lock(&priv->mutex);
2473
2474         if (conf->mac_addr) {
2475                 IWL_DEBUG_MAC80211(priv, "Set %pM\n", conf->mac_addr);
2476                 memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
2477         }
2478
2479         if (iwl_set_mode(priv, conf->type) == -EAGAIN)
2480                 /* we are not ready, will run again when ready */
2481                 set_bit(STATUS_MODE_PENDING, &priv->status);
2482
2483         mutex_unlock(&priv->mutex);
2484
2485         IWL_DEBUG_MAC80211(priv, "leave\n");
2486         return 0;
2487 }
2488 EXPORT_SYMBOL(iwl_mac_add_interface);
2489
2490 void iwl_mac_remove_interface(struct ieee80211_hw *hw,
2491                                      struct ieee80211_if_init_conf *conf)
2492 {
2493         struct iwl_priv *priv = hw->priv;
2494
2495         IWL_DEBUG_MAC80211(priv, "enter\n");
2496
2497         mutex_lock(&priv->mutex);
2498
2499         if (iwl_is_ready_rf(priv)) {
2500                 iwl_scan_cancel_timeout(priv, 100);
2501                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2502                 iwlcore_commit_rxon(priv);
2503         }
2504         if (priv->vif == conf->vif) {
2505                 priv->vif = NULL;
2506                 memset(priv->bssid, 0, ETH_ALEN);
2507         }
2508         mutex_unlock(&priv->mutex);
2509
2510         IWL_DEBUG_MAC80211(priv, "leave\n");
2511
2512 }
2513 EXPORT_SYMBOL(iwl_mac_remove_interface);
2514
2515 /**
2516  * iwl_mac_config - mac80211 config callback
2517  *
2518  * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
2519  * be set inappropriately and the driver currently sets the hardware up to
2520  * use it whenever needed.
2521  */
2522 int iwl_mac_config(struct ieee80211_hw *hw, u32 changed)
2523 {
2524         struct iwl_priv *priv = hw->priv;
2525         const struct iwl_channel_info *ch_info;
2526         struct ieee80211_conf *conf = &hw->conf;
2527         unsigned long flags = 0;
2528         int ret = 0;
2529         u16 ch;
2530         int scan_active = 0;
2531
2532         mutex_lock(&priv->mutex);
2533
2534         IWL_DEBUG_MAC80211(priv, "enter to channel %d changed 0x%X\n",
2535                                         conf->channel->hw_value, changed);
2536
2537         if (unlikely(!priv->cfg->mod_params->disable_hw_scan &&
2538                         test_bit(STATUS_SCANNING, &priv->status))) {
2539                 scan_active = 1;
2540                 IWL_DEBUG_MAC80211(priv, "leave - scanning\n");
2541         }
2542
2543
2544         /* during scanning mac80211 will delay channel setting until
2545          * scan finish with changed = 0
2546          */
2547         if (!changed || (changed & IEEE80211_CONF_CHANGE_CHANNEL)) {
2548                 if (scan_active)
2549                         goto set_ch_out;
2550
2551                 ch = ieee80211_frequency_to_channel(conf->channel->center_freq);
2552                 ch_info = iwl_get_channel_info(priv, conf->channel->band, ch);
2553                 if (!is_channel_valid(ch_info)) {
2554                         IWL_DEBUG_MAC80211(priv, "leave - invalid channel\n");
2555                         ret = -EINVAL;
2556                         goto set_ch_out;
2557                 }
2558
2559                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC &&
2560                         !is_channel_ibss(ch_info)) {
2561                         IWL_ERR(priv, "channel %d in band %d not "
2562                                 "IBSS channel\n",
2563                                 conf->channel->hw_value, conf->channel->band);
2564                         ret = -EINVAL;
2565                         goto set_ch_out;
2566                 }
2567
2568                 priv->current_ht_config.is_ht = conf_is_ht(conf);
2569
2570                 spin_lock_irqsave(&priv->lock, flags);
2571
2572
2573                 /* if we are switching from ht to 2.4 clear flags
2574                  * from any ht related info since 2.4 does not
2575                  * support ht */
2576                 if ((le16_to_cpu(priv->staging_rxon.channel) != ch))
2577                         priv->staging_rxon.flags = 0;
2578
2579                 iwl_set_rxon_channel(priv, conf->channel);
2580
2581                 iwl_set_flags_for_band(priv, conf->channel->band);
2582                 spin_unlock_irqrestore(&priv->lock, flags);
2583  set_ch_out:
2584                 /* The list of supported rates and rate mask can be different
2585                  * for each band; since the band may have changed, reset
2586                  * the rate mask to what mac80211 lists */
2587                 iwl_set_rate(priv);
2588         }
2589
2590         if (changed & IEEE80211_CONF_CHANGE_PS &&
2591             priv->iw_mode == NL80211_IFTYPE_STATION) {
2592                 priv->power_data.power_disabled =
2593                         !(conf->flags & IEEE80211_CONF_PS);
2594                 ret = iwl_power_update_mode(priv, 0);
2595                 if (ret)
2596                         IWL_DEBUG_MAC80211(priv, "Error setting power level\n");
2597         }
2598
2599         if (changed & IEEE80211_CONF_CHANGE_POWER) {
2600                 IWL_DEBUG_MAC80211(priv, "TX Power old=%d new=%d\n",
2601                         priv->tx_power_user_lmt, conf->power_level);
2602
2603                 iwl_set_tx_power(priv, conf->power_level, false);
2604         }
2605
2606         /* call to ensure that 4965 rx_chain is set properly in monitor mode */
2607         if (priv->cfg->ops->hcmd->set_rxon_chain)
2608                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
2609
2610         if (changed & IEEE80211_CONF_CHANGE_RADIO_ENABLED) {
2611                 if (conf->radio_enabled &&
2612                         iwl_radio_kill_sw_enable_radio(priv)) {
2613                         IWL_DEBUG_MAC80211(priv, "leave - RF-KILL - "
2614                                                 "waiting for uCode\n");
2615                         goto out;
2616                 }
2617
2618                 if (!conf->radio_enabled)
2619                         iwl_radio_kill_sw_disable_radio(priv);
2620         }
2621
2622         if (!conf->radio_enabled) {
2623                 IWL_DEBUG_MAC80211(priv, "leave - radio disabled\n");
2624                 goto out;
2625         }
2626
2627         if (!iwl_is_ready(priv)) {
2628                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2629                 goto out;
2630         }
2631
2632         if (scan_active)
2633                 goto out;
2634
2635         if (memcmp(&priv->active_rxon,
2636                    &priv->staging_rxon, sizeof(priv->staging_rxon)))
2637                 iwlcore_commit_rxon(priv);
2638         else
2639                 IWL_DEBUG_INFO(priv, "Not re-sending same RXON configuration.\n");
2640
2641
2642 out:
2643         IWL_DEBUG_MAC80211(priv, "leave\n");
2644         mutex_unlock(&priv->mutex);
2645         return ret;
2646 }
2647 EXPORT_SYMBOL(iwl_mac_config);
2648
2649 int iwl_mac_get_tx_stats(struct ieee80211_hw *hw,
2650                          struct ieee80211_tx_queue_stats *stats)
2651 {
2652         struct iwl_priv *priv = hw->priv;
2653         int i, avail;
2654         struct iwl_tx_queue *txq;
2655         struct iwl_queue *q;
2656         unsigned long flags;
2657
2658         IWL_DEBUG_MAC80211(priv, "enter\n");
2659
2660         if (!iwl_is_ready_rf(priv)) {
2661                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
2662                 return -EIO;
2663         }
2664
2665         spin_lock_irqsave(&priv->lock, flags);
2666
2667         for (i = 0; i < AC_NUM; i++) {
2668                 txq = &priv->txq[i];
2669                 q = &txq->q;
2670                 avail = iwl_queue_space(q);
2671
2672                 stats[i].len = q->n_window - avail;
2673                 stats[i].limit = q->n_window - q->high_mark;
2674                 stats[i].count = q->n_window;
2675
2676         }
2677         spin_unlock_irqrestore(&priv->lock, flags);
2678
2679         IWL_DEBUG_MAC80211(priv, "leave\n");
2680
2681         return 0;
2682 }
2683 EXPORT_SYMBOL(iwl_mac_get_tx_stats);
2684
2685 void iwl_mac_reset_tsf(struct ieee80211_hw *hw)
2686 {
2687         struct iwl_priv *priv = hw->priv;
2688         unsigned long flags;
2689
2690         mutex_lock(&priv->mutex);
2691         IWL_DEBUG_MAC80211(priv, "enter\n");
2692
2693         spin_lock_irqsave(&priv->lock, flags);
2694         memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_info));
2695         spin_unlock_irqrestore(&priv->lock, flags);
2696
2697         iwl_reset_qos(priv);
2698
2699         spin_lock_irqsave(&priv->lock, flags);
2700         priv->assoc_id = 0;
2701         priv->assoc_capability = 0;
2702         priv->assoc_station_added = 0;
2703
2704         /* new association get rid of ibss beacon skb */
2705         if (priv->ibss_beacon)
2706                 dev_kfree_skb(priv->ibss_beacon);
2707
2708         priv->ibss_beacon = NULL;
2709
2710         priv->beacon_int = priv->vif->bss_conf.beacon_int;
2711         priv->timestamp = 0;
2712         if ((priv->iw_mode == NL80211_IFTYPE_STATION))
2713                 priv->beacon_int = 0;
2714
2715         spin_unlock_irqrestore(&priv->lock, flags);
2716
2717         if (!iwl_is_ready_rf(priv)) {
2718                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2719                 mutex_unlock(&priv->mutex);
2720                 return;
2721         }
2722
2723         /* we are restarting association process
2724          * clear RXON_FILTER_ASSOC_MSK bit
2725          */
2726         if (priv->iw_mode != NL80211_IFTYPE_AP) {
2727                 iwl_scan_cancel_timeout(priv, 100);
2728                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2729                 iwlcore_commit_rxon(priv);
2730         }
2731
2732         if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
2733                 IWL_DEBUG_MAC80211(priv, "leave - not in IBSS\n");
2734                 mutex_unlock(&priv->mutex);
2735                 return;
2736         }
2737
2738         iwl_set_rate(priv);
2739
2740         mutex_unlock(&priv->mutex);
2741
2742         IWL_DEBUG_MAC80211(priv, "leave\n");
2743 }
2744 EXPORT_SYMBOL(iwl_mac_reset_tsf);
2745
2746 #ifdef CONFIG_PM
2747
2748 int iwl_pci_suspend(struct pci_dev *pdev, pm_message_t state)
2749 {
2750         struct iwl_priv *priv = pci_get_drvdata(pdev);
2751
2752         /*
2753          * This function is called when system goes into suspend state
2754          * mac80211 will call iwl_mac_stop() from the mac80211 suspend function
2755          * first but since iwl_mac_stop() has no knowledge of who the caller is,
2756          * it will not call apm_ops.stop() to stop the DMA operation.
2757          * Calling apm_ops.stop here to make sure we stop the DMA.
2758          */
2759         priv->cfg->ops->lib->apm_ops.stop(priv);
2760
2761         pci_save_state(pdev);
2762         pci_disable_device(pdev);
2763         pci_set_power_state(pdev, PCI_D3hot);
2764
2765         return 0;
2766 }
2767 EXPORT_SYMBOL(iwl_pci_suspend);
2768
2769 int iwl_pci_resume(struct pci_dev *pdev)
2770 {
2771         struct iwl_priv *priv = pci_get_drvdata(pdev);
2772         int ret;
2773
2774         pci_set_power_state(pdev, PCI_D0);
2775         ret = pci_enable_device(pdev);
2776         if (ret)
2777                 return ret;
2778         pci_restore_state(pdev);
2779         iwl_enable_interrupts(priv);
2780
2781         return 0;
2782 }
2783 EXPORT_SYMBOL(iwl_pci_resume);
2784
2785 #endif /* CONFIG_PM */