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 void iwl_reset_qos(struct iwl_priv *priv)
 277 {
 278         u16 cw_min = 15;
 279         u16 cw_max = 1023;
 280         u8 aifs = 2;
 281         bool is_legacy = false;
 282         unsigned long flags;
 283         int i;
 284
 285         spin_lock_irqsave(&priv->lock, flags);
 286         /* QoS always active in AP and ADHOC mode
 287          * In STA mode wait for association
 288          */
 289         if (priv->iw_mode == NL80211_IFTYPE_ADHOC ||
 290             priv->iw_mode == NL80211_IFTYPE_AP)
 291                 priv->qos_data.qos_active = 1;
 292         else
 293                 priv->qos_data.qos_active = 0;
 294
 295         /* check for legacy mode */
 296         if ((priv->iw_mode == NL80211_IFTYPE_ADHOC &&
 297             (priv->active_rate & IWL_OFDM_RATES_MASK) == 0) ||
 298             (priv->iw_mode == NL80211_IFTYPE_STATION &&
 299             (priv->staging_rxon.flags & RXON_FLG_SHORT_SLOT_MSK) == 0)) {
 300                 cw_min = 31;
 301                 is_legacy = 1;
 302         }
 303
 304         if (priv->qos_data.qos_active)
 305                 aifs = 3;
 306
 307         priv->qos_data.def_qos_parm.ac[0].cw_min = cpu_to_le16(cw_min);
 308         priv->qos_data.def_qos_parm.ac[0].cw_max = cpu_to_le16(cw_max);
 309         priv->qos_data.def_qos_parm.ac[0].aifsn = aifs;
 310         priv->qos_data.def_qos_parm.ac[0].edca_txop = 0;
 311         priv->qos_data.def_qos_parm.ac[0].reserved1 = 0;
 312
 313         if (priv->qos_data.qos_active) {
 314                 i = 1;
 315                 priv->qos_data.def_qos_parm.ac[i].cw_min = cpu_to_le16(cw_min);
 316                 priv->qos_data.def_qos_parm.ac[i].cw_max = cpu_to_le16(cw_max);
 317                 priv->qos_data.def_qos_parm.ac[i].aifsn = 7;
 318                 priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
 319                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
 320
 321                 i = 2;
 322                 priv->qos_data.def_qos_parm.ac[i].cw_min =
 323                         cpu_to_le16((cw_min + 1) / 2 - 1);
 324                 priv->qos_data.def_qos_parm.ac[i].cw_max =
 325                         cpu_to_le16(cw_max);
 326                 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
 327                 if (is_legacy)
 328                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
 329                                 cpu_to_le16(6016);
 330                 else
 331                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
 332                                 cpu_to_le16(3008);
 333                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
 334
 335                 i = 3;
 336                 priv->qos_data.def_qos_parm.ac[i].cw_min =
 337                         cpu_to_le16((cw_min + 1) / 4 - 1);
 338                 priv->qos_data.def_qos_parm.ac[i].cw_max =
 339                         cpu_to_le16((cw_max + 1) / 2 - 1);
 340                 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
 341                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
 342                 if (is_legacy)
 343                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
 344                                 cpu_to_le16(3264);
 345                 else
 346                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
 347                                 cpu_to_le16(1504);
 348         } else {
 349                 for (i = 1; i < 4; i++) {
 350                         priv->qos_data.def_qos_parm.ac[i].cw_min =
 351                                 cpu_to_le16(cw_min);
 352                         priv->qos_data.def_qos_parm.ac[i].cw_max =
 353                                 cpu_to_le16(cw_max);
 354                         priv->qos_data.def_qos_parm.ac[i].aifsn = aifs;
 355                         priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
 356                         priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
 357                 }
 358         }
 359         IWL_DEBUG_QOS(priv, "set QoS to default \n");
 360
 361         spin_unlock_irqrestore(&priv->lock, flags);
 362 }
 363 EXPORT_SYMBOL(iwl_reset_qos);
 364
 365 #define MAX_BIT_RATE_40_MHZ 150 /* Mbps */
 366 #define MAX_BIT_RATE_20_MHZ 72 /* Mbps */
 367 static void iwlcore_init_ht_hw_capab(const struct iwl_priv *priv,
 368                               struct ieee80211_sta_ht_cap *ht_info,
 369                               enum ieee80211_band band)
 370 {
 371         u16 max_bit_rate = 0;
 372         u8 rx_chains_num = priv->hw_params.rx_chains_num;
 373         u8 tx_chains_num = priv->hw_params.tx_chains_num;
 374
 375         ht_info->cap = 0;
 376         memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));
 377
 378         ht_info->ht_supported = true;
 379
 380         ht_info->cap |= IEEE80211_HT_CAP_GRN_FLD;
 381         ht_info->cap |= IEEE80211_HT_CAP_SGI_20;
 382         ht_info->cap |= (IEEE80211_HT_CAP_SM_PS &
 383                              (WLAN_HT_CAP_SM_PS_DISABLED << 2));
 384
 385         max_bit_rate = MAX_BIT_RATE_20_MHZ;
 386         if (priv->hw_params.fat_channel & BIT(band)) {
 387                 ht_info->cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 388                 ht_info->cap |= IEEE80211_HT_CAP_SGI_40;
 389                 ht_info->mcs.rx_mask[4] = 0x01;
 390                 max_bit_rate = MAX_BIT_RATE_40_MHZ;
 391         }
 392
 393         if (priv->cfg->mod_params->amsdu_size_8K)
 394                 ht_info->cap |= IEEE80211_HT_CAP_MAX_AMSDU;
 395
 396         ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
 397         ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;
 398
 399         ht_info->mcs.rx_mask[0] = 0xFF;
 400         if (rx_chains_num >= 2)
 401                 ht_info->mcs.rx_mask[1] = 0xFF;
 402         if (rx_chains_num >= 3)
 403                 ht_info->mcs.rx_mask[2] = 0xFF;
 404
 405         /* Highest supported Rx data rate */
 406         max_bit_rate *= rx_chains_num;
 407         WARN_ON(max_bit_rate & ~IEEE80211_HT_MCS_RX_HIGHEST_MASK);
 408         ht_info->mcs.rx_highest = cpu_to_le16(max_bit_rate);
 409
 410         /* Tx MCS capabilities */
 411         ht_info->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
 412         if (tx_chains_num != rx_chains_num) {
 413                 ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
 414                 ht_info->mcs.tx_params |= ((tx_chains_num - 1) <<
 415                                 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT);
 416         }
 417 }
 418
 419 static void iwlcore_init_hw_rates(struct iwl_priv *priv,
 420                               struct ieee80211_rate *rates)
 421 {
 422         int i;
 423
 424         for (i = 0; i < IWL_RATE_COUNT; i++) {
 425                 rates[i].bitrate = iwl_rates[i].ieee * 5;
 426                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
 427                 rates[i].hw_value_short = i;
 428                 rates[i].flags = 0;
 429                 if ((i > IWL_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
 430                         /*
 431                          * If CCK != 1M then set short preamble rate flag.
 432                          */
 433                         rates[i].flags |=
 434                                 (iwl_rates[i].plcp == IWL_RATE_1M_PLCP) ?
 435                                         0 : IEEE80211_RATE_SHORT_PREAMBLE;
 436                 }
 437         }
 438 }
 439
 440
 441 /**
 442  * iwlcore_init_geos - Initialize mac80211's geo/channel info based from eeprom
 443  */
 444 int iwlcore_init_geos(struct iwl_priv *priv)
 445 {
 446         struct iwl_channel_info *ch;
 447         struct ieee80211_supported_band *sband;
 448         struct ieee80211_channel *channels;
 449         struct ieee80211_channel *geo_ch;
 450         struct ieee80211_rate *rates;
 451         int i = 0;
 452
 453         if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
 454             priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
 455                 IWL_DEBUG_INFO(priv, "Geography modes already initialized.\n");
 456                 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
 457                 return 0;
 458         }
 459
 460         channels = kzalloc(sizeof(struct ieee80211_channel) *
 461                            priv->channel_count, GFP_KERNEL);
 462         if (!channels)
 463                 return -ENOMEM;
 464
 465         rates = kzalloc((sizeof(struct ieee80211_rate) * (IWL_RATE_COUNT + 1)),
 466                         GFP_KERNEL);
 467         if (!rates) {
 468                 kfree(channels);
 469                 return -ENOMEM;
 470         }
 471
 472         /* 5.2GHz channels start after the 2.4GHz channels */
 473         sband = &priv->bands[IEEE80211_BAND_5GHZ];
 474         sband->channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)];
 475         /* just OFDM */
 476         sband->bitrates = &rates[IWL_FIRST_OFDM_RATE];
 477         sband->n_bitrates = IWL_RATE_COUNT - IWL_FIRST_OFDM_RATE;
 478
 479         if (priv->cfg->sku & IWL_SKU_N)
 480                 iwlcore_init_ht_hw_capab(priv, &sband->ht_cap,
 481                                          IEEE80211_BAND_5GHZ);
 482
 483         sband = &priv->bands[IEEE80211_BAND_2GHZ];
 484         sband->channels = channels;
 485         /* OFDM & CCK */
 486         sband->bitrates = rates;
 487         sband->n_bitrates = IWL_RATE_COUNT;
 488
 489         if (priv->cfg->sku & IWL_SKU_N)
 490                 iwlcore_init_ht_hw_capab(priv, &sband->ht_cap,
 491                                          IEEE80211_BAND_2GHZ);
 492
 493         priv->ieee_channels = channels;
 494         priv->ieee_rates = rates;
 495
 496         for (i = 0;  i < priv->channel_count; i++) {
 497                 ch = &priv->channel_info[i];
 498
 499                 /* FIXME: might be removed if scan is OK */
 500                 if (!is_channel_valid(ch))
 501                         continue;
 502
 503                 if (is_channel_a_band(ch))
 504                         sband =  &priv->bands[IEEE80211_BAND_5GHZ];
 505                 else
 506                         sband =  &priv->bands[IEEE80211_BAND_2GHZ];
 507
 508                 geo_ch = &sband->channels[sband->n_channels++];
 509
 510                 geo_ch->center_freq =
 511                                 ieee80211_channel_to_frequency(ch->channel);
 512                 geo_ch->max_power = ch->max_power_avg;
 513                 geo_ch->max_antenna_gain = 0xff;
 514                 geo_ch->hw_value = ch->channel;
 515
 516                 if (is_channel_valid(ch)) {
 517                         if (!(ch->flags & EEPROM_CHANNEL_IBSS))
 518                                 geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
 519
 520                         if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
 521                                 geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
 522
 523                         if (ch->flags & EEPROM_CHANNEL_RADAR)
 524                                 geo_ch->flags |= IEEE80211_CHAN_RADAR;
 525
 526                         geo_ch->flags |= ch->fat_extension_channel;
 527
 528                         if (ch->max_power_avg > priv->tx_power_channel_lmt)
 529                                 priv->tx_power_channel_lmt = ch->max_power_avg;
 530                 } else {
 531                         geo_ch->flags |= IEEE80211_CHAN_DISABLED;
 532                 }
 533
 534                 /* Save flags for reg domain usage */
 535                 geo_ch->orig_flags = geo_ch->flags;
 536
 537                 IWL_DEBUG_INFO(priv, "Channel %d Freq=%d[%sGHz] %s flag=0x%X\n",
 538                                 ch->channel, geo_ch->center_freq,
 539                                 is_channel_a_band(ch) ?  "5.2" : "2.4",
 540                                 geo_ch->flags & IEEE80211_CHAN_DISABLED ?
 541                                 "restricted" : "valid",
 542                                  geo_ch->flags);
 543         }
 544
 545         if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) &&
 546              priv->cfg->sku & IWL_SKU_A) {
 547                 IWL_INFO(priv, "Incorrectly detected BG card as ABG. "
 548                         "Please send your PCI ID 0x%04X:0x%04X to maintainer.\n",
 549                            priv->pci_dev->device,
 550                            priv->pci_dev->subsystem_device);
 551                 priv->cfg->sku &= ~IWL_SKU_A;
 552         }
 553
 554         IWL_INFO(priv, "Tunable channels: %d 802.11bg, %d 802.11a channels\n",
 555                    priv->bands[IEEE80211_BAND_2GHZ].n_channels,
 556                    priv->bands[IEEE80211_BAND_5GHZ].n_channels);
 557
 558         set_bit(STATUS_GEO_CONFIGURED, &priv->status);
 559
 560         return 0;
 561 }
 562 EXPORT_SYMBOL(iwlcore_init_geos);
 563
 564 /*
 565  * iwlcore_free_geos - undo allocations in iwlcore_init_geos
 566  */
 567 void iwlcore_free_geos(struct iwl_priv *priv)
 568 {
 569         kfree(priv->ieee_channels);
 570         kfree(priv->ieee_rates);
 571         clear_bit(STATUS_GEO_CONFIGURED, &priv->status);
 572 }
 573 EXPORT_SYMBOL(iwlcore_free_geos);
 574
 575 static bool is_single_rx_stream(struct iwl_priv *priv)
 576 {
 577         return !priv->current_ht_config.is_ht ||
 578                ((priv->current_ht_config.mcs.rx_mask[1] == 0) &&
 579                 (priv->current_ht_config.mcs.rx_mask[2] == 0));
 580 }
 581
 582 static u8 iwl_is_channel_extension(struct iwl_priv *priv,
 583                                    enum ieee80211_band band,
 584                                    u16 channel, u8 extension_chan_offset)
 585 {
 586         const struct iwl_channel_info *ch_info;
 587
 588         ch_info = iwl_get_channel_info(priv, band, channel);
 589         if (!is_channel_valid(ch_info))
 590                 return 0;
 591
 592         if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE)
 593                 return !(ch_info->fat_extension_channel &
 594                                         IEEE80211_CHAN_NO_FAT_ABOVE);
 595         else if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW)
 596                 return !(ch_info->fat_extension_channel &
 597                                         IEEE80211_CHAN_NO_FAT_BELOW);
 598
 599         return 0;
 600 }
 601
 602 u8 iwl_is_fat_tx_allowed(struct iwl_priv *priv,
 603                          struct ieee80211_sta_ht_cap *sta_ht_inf)
 604 {
 605         struct iwl_ht_info *iwl_ht_conf = &priv->current_ht_config;
 606
 607         if ((!iwl_ht_conf->is_ht) ||
 608            (iwl_ht_conf->supported_chan_width != IWL_CHANNEL_WIDTH_40MHZ) ||
 609            (iwl_ht_conf->extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_NONE))
 610                 return 0;
 611
 612         if (sta_ht_inf) {
 613                 if ((!sta_ht_inf->ht_supported) ||
 614                    (!(sta_ht_inf->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40)))
 615                         return 0;
 616         }
 617
 618         return iwl_is_channel_extension(priv, priv->band,
 619                                         le16_to_cpu(priv->staging_rxon.channel),
 620                                         iwl_ht_conf->extension_chan_offset);
 621 }
 622 EXPORT_SYMBOL(iwl_is_fat_tx_allowed);
 623
 624 void iwl_set_rxon_hwcrypto(struct iwl_priv *priv, int hw_decrypt)
 625 {
 626         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
 627
 628         if (hw_decrypt)
 629                 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
 630         else
 631                 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
 632
 633 }
 634 EXPORT_SYMBOL(iwl_set_rxon_hwcrypto);
 635
 636 /**
 637  * iwl_check_rxon_cmd - validate RXON structure is valid
 638  *
 639  * NOTE:  This is really only useful during development and can eventually
 640  * be #ifdef'd out once the driver is stable and folks aren't actively
 641  * making changes
 642  */
 643 int iwl_check_rxon_cmd(struct iwl_priv *priv)
 644 {
 645         int error = 0;
 646         int counter = 1;
 647         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
 648
 649         if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
 650                 error |= le32_to_cpu(rxon->flags &
 651                                 (RXON_FLG_TGJ_NARROW_BAND_MSK |
 652                                  RXON_FLG_RADAR_DETECT_MSK));
 653                 if (error)
 654                         IWL_WARN(priv, "check 24G fields %d | %d\n",
 655                                     counter++, error);
 656         } else {
 657                 error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ?
 658                                 0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK);
 659                 if (error)
 660                         IWL_WARN(priv, "check 52 fields %d | %d\n",
 661                                     counter++, error);
 662                 error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK);
 663                 if (error)
 664                         IWL_WARN(priv, "check 52 CCK %d | %d\n",
 665                                     counter++, error);
 666         }
 667         error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1;
 668         if (error)
 669                 IWL_WARN(priv, "check mac addr %d | %d\n", counter++, error);
 670
 671         /* make sure basic rates 6Mbps and 1Mbps are supported */
 672         error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) &&
 673                   ((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0));
 674         if (error)
 675                 IWL_WARN(priv, "check basic rate %d | %d\n", counter++, error);
 676
 677         error |= (le16_to_cpu(rxon->assoc_id) > 2007);
 678         if (error)
 679                 IWL_WARN(priv, "check assoc id %d | %d\n", counter++, error);
 680
 681         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
 682                         == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK));
 683         if (error)
 684                 IWL_WARN(priv, "check CCK and short slot %d | %d\n",
 685                             counter++, error);
 686
 687         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
 688                         == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK));
 689         if (error)
 690                 IWL_WARN(priv, "check CCK & auto detect %d | %d\n",
 691                             counter++, error);
 692
 693         error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
 694                         RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK);
 695         if (error)
 696                 IWL_WARN(priv, "check TGG and auto detect %d | %d\n",
 697                             counter++, error);
 698
 699         if (error)
 700                 IWL_WARN(priv, "Tuning to channel %d\n",
 701                             le16_to_cpu(rxon->channel));
 702
 703         if (error) {
 704                 IWL_ERR(priv, "Not a valid iwl_rxon_assoc_cmd field values\n");
 705                 return -1;
 706         }
 707         return 0;
 708 }
 709 EXPORT_SYMBOL(iwl_check_rxon_cmd);
 710
 711 /**
 712  * iwl_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
 713  * @priv: staging_rxon is compared to active_rxon
 714  *
 715  * If the RXON structure is changing enough to require a new tune,
 716  * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
 717  * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
 718  */
 719 int iwl_full_rxon_required(struct iwl_priv *priv)
 720 {
 721
 722         /* These items are only settable from the full RXON command */
 723         if (!(iwl_is_associated(priv)) ||
 724             compare_ether_addr(priv->staging_rxon.bssid_addr,
 725                                priv->active_rxon.bssid_addr) ||
 726             compare_ether_addr(priv->staging_rxon.node_addr,
 727                                priv->active_rxon.node_addr) ||
 728             compare_ether_addr(priv->staging_rxon.wlap_bssid_addr,
 729                                priv->active_rxon.wlap_bssid_addr) ||
 730             (priv->staging_rxon.dev_type != priv->active_rxon.dev_type) ||
 731             (priv->staging_rxon.channel != priv->active_rxon.channel) ||
 732             (priv->staging_rxon.air_propagation !=
 733              priv->active_rxon.air_propagation) ||
 734             (priv->staging_rxon.ofdm_ht_single_stream_basic_rates !=
 735              priv->active_rxon.ofdm_ht_single_stream_basic_rates) ||
 736             (priv->staging_rxon.ofdm_ht_dual_stream_basic_rates !=
 737              priv->active_rxon.ofdm_ht_dual_stream_basic_rates) ||
 738             (priv->staging_rxon.ofdm_ht_triple_stream_basic_rates !=
 739              priv->active_rxon.ofdm_ht_triple_stream_basic_rates) ||
 740             (priv->staging_rxon.assoc_id != priv->active_rxon.assoc_id))
 741                 return 1;
 742
 743         /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
 744          * be updated with the RXON_ASSOC command -- however only some
 745          * flag transitions are allowed using RXON_ASSOC */
 746
 747         /* Check if we are not switching bands */
 748         if ((priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) !=
 749             (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK))
 750                 return 1;
 751
 752         /* Check if we are switching association toggle */
 753         if ((priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) !=
 754                 (priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK))
 755                 return 1;
 756
 757         return 0;
 758 }
 759 EXPORT_SYMBOL(iwl_full_rxon_required);
 760
 761 u8 iwl_rate_get_lowest_plcp(struct iwl_priv *priv)
 762 {
 763         int i;
 764         int rate_mask;
 765
 766         /* Set rate mask*/
 767         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)
 768                 rate_mask = priv->active_rate_basic & IWL_CCK_RATES_MASK;
 769         else
 770                 rate_mask = priv->active_rate_basic & IWL_OFDM_RATES_MASK;
 771
 772         /* Find lowest valid rate */
 773         for (i = IWL_RATE_1M_INDEX; i != IWL_RATE_INVALID;
 774                                         i = iwl_rates[i].next_ieee) {
 775                 if (rate_mask & (1 << i))
 776                         return iwl_rates[i].plcp;
 777         }
 778
 779         /* No valid rate was found. Assign the lowest one */
 780         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)
 781                 return IWL_RATE_1M_PLCP;
 782         else
 783                 return IWL_RATE_6M_PLCP;
 784 }
 785 EXPORT_SYMBOL(iwl_rate_get_lowest_plcp);
 786
 787 void iwl_set_rxon_ht(struct iwl_priv *priv, struct iwl_ht_info *ht_info)
 788 {
 789         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
 790         u32 val;
 791
 792         if (!ht_info->is_ht) {
 793                 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED_MSK |
 794                         RXON_FLG_CHANNEL_MODE_PURE_40_MSK |
 795                         RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK |
 796                         RXON_FLG_FAT_PROT_MSK |
 797                         RXON_FLG_HT_PROT_MSK);
 798                 return;
 799         }
 800
 801         /* Set up channel bandwidth:  20 MHz only, or 20/40 mixed if fat ok */
 802         if (iwl_is_fat_tx_allowed(priv, NULL))
 803                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED_MSK;
 804         else
 805                 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED_MSK |
 806                                  RXON_FLG_CHANNEL_MODE_PURE_40_MSK);
 807
 808         /* Note: control channel is opposite of extension channel */
 809         switch (ht_info->extension_chan_offset) {
 810         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 811                 rxon->flags &= ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
 812                 break;
 813         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 814                 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
 815                 break;
 816         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
 817         default:
 818                 rxon->flags &= ~RXON_FLG_CHANNEL_MODE_MIXED_MSK;
 819                 break;
 820         }
 821
 822         val = ht_info->ht_protection;
 823
 824         rxon->flags |= cpu_to_le32(val << RXON_FLG_HT_OPERATING_MODE_POS);
 825
 826         if (priv->cfg->ops->hcmd->set_rxon_chain)
 827                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
 828
 829         IWL_DEBUG_ASSOC(priv, "supported HT rate 0x%X 0x%X 0x%X "
 830                         "rxon flags 0x%X operation mode :0x%X "
 831                         "extension channel offset 0x%x\n",
 832                         ht_info->mcs.rx_mask[0],
 833                         ht_info->mcs.rx_mask[1],
 834                         ht_info->mcs.rx_mask[2],
 835                         le32_to_cpu(rxon->flags), ht_info->ht_protection,
 836                         ht_info->extension_chan_offset);
 837         return;
 838 }
 839 EXPORT_SYMBOL(iwl_set_rxon_ht);
 840
 841 #define IWL_NUM_RX_CHAINS_MULTIPLE      3
 842 #define IWL_NUM_RX_CHAINS_SINGLE        2
 843 #define IWL_NUM_IDLE_CHAINS_DUAL        2
 844 #define IWL_NUM_IDLE_CHAINS_SINGLE      1
 845
 846 /* Determine how many receiver/antenna chains to use.
 847  * More provides better reception via diversity.  Fewer saves power.
 848  * MIMO (dual stream) requires at least 2, but works better with 3.
 849  * This does not determine *which* chains to use, just how many.
 850  */
 851 static int iwl_get_active_rx_chain_count(struct iwl_priv *priv)
 852 {
 853         bool is_single = is_single_rx_stream(priv);
 854         bool is_cam = !test_bit(STATUS_POWER_PMI, &priv->status);
 855
 856         /* # of Rx chains to use when expecting MIMO. */
 857         if (is_single || (!is_cam && (priv->current_ht_config.sm_ps ==
 858                                                  WLAN_HT_CAP_SM_PS_STATIC)))
 859                 return IWL_NUM_RX_CHAINS_SINGLE;
 860         else
 861                 return IWL_NUM_RX_CHAINS_MULTIPLE;
 862 }
 863
 864 static int iwl_get_idle_rx_chain_count(struct iwl_priv *priv, int active_cnt)
 865 {
 866         int idle_cnt;
 867         bool is_cam = !test_bit(STATUS_POWER_PMI, &priv->status);
 868         /* # Rx chains when idling and maybe trying to save power */
 869         switch (priv->current_ht_config.sm_ps) {
 870         case WLAN_HT_CAP_SM_PS_STATIC:
 871         case WLAN_HT_CAP_SM_PS_DYNAMIC:
 872                 idle_cnt = (is_cam) ? IWL_NUM_IDLE_CHAINS_DUAL :
 873                                         IWL_NUM_IDLE_CHAINS_SINGLE;
 874                 break;
 875         case WLAN_HT_CAP_SM_PS_DISABLED:
 876                 idle_cnt = (is_cam) ? active_cnt : IWL_NUM_IDLE_CHAINS_SINGLE;
 877                 break;
 878         case WLAN_HT_CAP_SM_PS_INVALID:
 879         default:
 880                 IWL_ERR(priv, "invalid mimo ps mode %d\n",
 881                            priv->current_ht_config.sm_ps);
 882                 WARN_ON(1);
 883                 idle_cnt = -1;
 884                 break;
 885         }
 886         return idle_cnt;
 887 }
 888
 889 /* up to 4 chains */
 890 static u8 iwl_count_chain_bitmap(u32 chain_bitmap)
 891 {
 892         u8 res;
 893         res = (chain_bitmap & BIT(0)) >> 0;
 894         res += (chain_bitmap & BIT(1)) >> 1;
 895         res += (chain_bitmap & BIT(2)) >> 2;
 896         res += (chain_bitmap & BIT(4)) >> 4;
 897         return res;
 898 }
 899
 900 /**
 901  * iwl_is_monitor_mode - Determine if interface in monitor mode
 902  *
 903  * priv->iw_mode is set in add_interface, but add_interface is
 904  * never called for monitor mode. The only way mac80211 informs us about
 905  * monitor mode is through configuring filters (call to configure_filter).
 906  */
 907 bool iwl_is_monitor_mode(struct iwl_priv *priv)
 908 {
 909         return !!(priv->staging_rxon.filter_flags & RXON_FILTER_PROMISC_MSK);
 910 }
 911 EXPORT_SYMBOL(iwl_is_monitor_mode);
 912
 913 /**
 914  * iwl_set_rxon_chain - Set up Rx chain usage in "staging" RXON image
 915  *
 916  * Selects how many and which Rx receivers/antennas/chains to use.
 917  * This should not be used for scan command ... it puts data in wrong place.
 918  */
 919 void iwl_set_rxon_chain(struct iwl_priv *priv)
 920 {
 921         bool is_single = is_single_rx_stream(priv);
 922         bool is_cam = !test_bit(STATUS_POWER_PMI, &priv->status);
 923         u8 idle_rx_cnt, active_rx_cnt, valid_rx_cnt;
 924         u32 active_chains;
 925         u16 rx_chain;
 926
 927         /* Tell uCode which antennas are actually connected.
 928          * Before first association, we assume all antennas are connected.
 929          * Just after first association, iwl_chain_noise_calibration()
 930          *    checks which antennas actually *are* connected. */
 931          if (priv->chain_noise_data.active_chains)
 932                 active_chains = priv->chain_noise_data.active_chains;
 933         else
 934                 active_chains = priv->hw_params.valid_rx_ant;
 935
 936         rx_chain = active_chains << RXON_RX_CHAIN_VALID_POS;
 937
 938         /* How many receivers should we use? */
 939         active_rx_cnt = iwl_get_active_rx_chain_count(priv);
 940         idle_rx_cnt = iwl_get_idle_rx_chain_count(priv, active_rx_cnt);
 941
 942
 943         /* correct rx chain count according hw settings
 944          * and chain noise calibration
 945          */
 946         valid_rx_cnt = iwl_count_chain_bitmap(active_chains);
 947         if (valid_rx_cnt < active_rx_cnt)
 948                 active_rx_cnt = valid_rx_cnt;
 949
 950         if (valid_rx_cnt < idle_rx_cnt)
 951                 idle_rx_cnt = valid_rx_cnt;
 952
 953         rx_chain |= active_rx_cnt << RXON_RX_CHAIN_MIMO_CNT_POS;
 954         rx_chain |= idle_rx_cnt  << RXON_RX_CHAIN_CNT_POS;
 955
 956         /* copied from 'iwl_bg_request_scan()' */
 957         /* Force use of chains B and C (0x6) for Rx for 4965
 958          * Avoid A (0x1) because of its off-channel reception on A-band.
 959          * MIMO is not used here, but value is required */
 960         if (iwl_is_monitor_mode(priv) &&
 961             !(priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) &&
 962             ((priv->hw_rev & CSR_HW_REV_TYPE_MSK) == CSR_HW_REV_TYPE_4965)) {
 963                 rx_chain = 0x07 << RXON_RX_CHAIN_VALID_POS;
 964                 rx_chain |= 0x06 << RXON_RX_CHAIN_FORCE_SEL_POS;
 965                 rx_chain |= 0x07 << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS;
 966                 rx_chain |= 0x01 << RXON_RX_CHAIN_DRIVER_FORCE_POS;
 967         }
 968
 969         priv->staging_rxon.rx_chain = cpu_to_le16(rx_chain);
 970
 971         if (!is_single && (active_rx_cnt >= IWL_NUM_RX_CHAINS_SINGLE) && is_cam)
 972                 priv->staging_rxon.rx_chain |= RXON_RX_CHAIN_MIMO_FORCE_MSK;
 973         else
 974                 priv->staging_rxon.rx_chain &= ~RXON_RX_CHAIN_MIMO_FORCE_MSK;
 975
 976         IWL_DEBUG_ASSOC(priv, "rx_chain=0x%X active=%d idle=%d\n",
 977                         priv->staging_rxon.rx_chain,
 978                         active_rx_cnt, idle_rx_cnt);
 979
 980         WARN_ON(active_rx_cnt == 0 || idle_rx_cnt == 0 ||
 981                 active_rx_cnt < idle_rx_cnt);
 982 }
 983 EXPORT_SYMBOL(iwl_set_rxon_chain);
 984
 985 /**
 986  * iwl_set_rxon_channel - Set the phymode and channel values in staging RXON
 987  * @phymode: MODE_IEEE80211A sets to 5.2GHz; all else set to 2.4GHz
 988  * @channel: Any channel valid for the requested phymode
 989
 990  * In addition to setting the staging RXON, priv->phymode is also set.
 991  *
 992  * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
 993  * in the staging RXON flag structure based on the phymode
 994  */
 995 int iwl_set_rxon_channel(struct iwl_priv *priv, struct ieee80211_channel *ch)
 996 {
 997         enum ieee80211_band band = ch->band;
 998         u16 channel = ieee80211_frequency_to_channel(ch->center_freq);
 999
1000         if (!iwl_get_channel_info(priv, band, channel)) {
1001                 IWL_DEBUG_INFO(priv, "Could not set channel to %d [%d]\n",
1002                                channel, band);
1003                 return -EINVAL;
1004         }
1005
1006         if ((le16_to_cpu(priv->staging_rxon.channel) == channel) &&
1007             (priv->band == band))
1008                 return 0;
1009
1010         priv->staging_rxon.channel = cpu_to_le16(channel);
1011         if (band == IEEE80211_BAND_5GHZ)
1012                 priv->staging_rxon.flags &= ~RXON_FLG_BAND_24G_MSK;
1013         else
1014                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
1015
1016         priv->band = band;
1017
1018         IWL_DEBUG_INFO(priv, "Staging channel set to %d [%d]\n", channel, band);
1019
1020         return 0;
1021 }
1022 EXPORT_SYMBOL(iwl_set_rxon_channel);
1023
1024 void iwl_set_flags_for_band(struct iwl_priv *priv,
1025                             enum ieee80211_band band)
1026 {
1027         if (band == IEEE80211_BAND_5GHZ) {
1028                 priv->staging_rxon.flags &=
1029                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
1030                       | RXON_FLG_CCK_MSK);
1031                 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
1032         } else {
1033                 /* Copied from iwl_post_associate() */
1034                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
1035                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
1036                 else
1037                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
1038
1039                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
1040                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
1041
1042                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
1043                 priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
1044                 priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
1045         }
1046 }
1047 EXPORT_SYMBOL(iwl_set_flags_for_band);
1048
1049 /*
1050  * initialize rxon structure with default values from eeprom
1051  */
1052 void iwl_connection_init_rx_config(struct iwl_priv *priv, int mode)
1053 {
1054         const struct iwl_channel_info *ch_info;
1055
1056         memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
1057
1058         switch (mode) {
1059         case NL80211_IFTYPE_AP:
1060                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
1061                 break;
1062
1063         case NL80211_IFTYPE_STATION:
1064                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
1065                 priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
1066                 break;
1067
1068         case NL80211_IFTYPE_ADHOC:
1069                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
1070                 priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
1071                 priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
1072                                                   RXON_FILTER_ACCEPT_GRP_MSK;
1073                 break;
1074
1075         default:
1076                 IWL_ERR(priv, "Unsupported interface type %d\n", mode);
1077                 break;
1078         }
1079
1080 #if 0
1081         /* TODO:  Figure out when short_preamble would be set and cache from
1082          * that */
1083         if (!hw_to_local(priv->hw)->short_preamble)
1084                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
1085         else
1086                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
1087 #endif
1088
1089         ch_info = iwl_get_channel_info(priv, priv->band,
1090                                        le16_to_cpu(priv->active_rxon.channel));
1091
1092         if (!ch_info)
1093                 ch_info = &priv->channel_info[0];
1094
1095         /*
1096          * in some case A channels are all non IBSS
1097          * in this case force B/G channel
1098          */
1099         if ((priv->iw_mode == NL80211_IFTYPE_ADHOC) &&
1100             !(is_channel_ibss(ch_info)))
1101                 ch_info = &priv->channel_info[0];
1102
1103         priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
1104         priv->band = ch_info->band;
1105
1106         iwl_set_flags_for_band(priv, priv->band);
1107
1108         priv->staging_rxon.ofdm_basic_rates =
1109             (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
1110         priv->staging_rxon.cck_basic_rates =
1111             (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
1112
1113         priv->staging_rxon.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED_MSK |
1114                                         RXON_FLG_CHANNEL_MODE_PURE_40_MSK);
1115         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
1116         memcpy(priv->staging_rxon.wlap_bssid_addr, priv->mac_addr, ETH_ALEN);
1117         priv->staging_rxon.ofdm_ht_single_stream_basic_rates = 0xff;
1118         priv->staging_rxon.ofdm_ht_dual_stream_basic_rates = 0xff;
1119         priv->staging_rxon.ofdm_ht_triple_stream_basic_rates = 0xff;
1120 }
1121 EXPORT_SYMBOL(iwl_connection_init_rx_config);
1122
1123 void iwl_set_rate(struct iwl_priv *priv)
1124 {
1125         const struct ieee80211_supported_band *hw = NULL;
1126         struct ieee80211_rate *rate;
1127         int i;
1128
1129         hw = iwl_get_hw_mode(priv, priv->band);
1130         if (!hw) {
1131                 IWL_ERR(priv, "Failed to set rate: unable to get hw mode\n");
1132                 return;
1133         }
1134
1135         priv->active_rate = 0;
1136         priv->active_rate_basic = 0;
1137
1138         for (i = 0; i < hw->n_bitrates; i++) {
1139                 rate = &(hw->bitrates[i]);
1140                 if (rate->hw_value < IWL_RATE_COUNT)
1141                         priv->active_rate |= (1 << rate->hw_value);
1142         }
1143
1144         IWL_DEBUG_RATE(priv, "Set active_rate = %0x, active_rate_basic = %0x\n",
1145                        priv->active_rate, priv->active_rate_basic);
1146
1147         /*
1148          * If a basic rate is configured, then use it (adding IWL_RATE_1M_MASK)
1149          * otherwise set it to the default of all CCK rates and 6, 12, 24 for
1150          * OFDM
1151          */
1152         if (priv->active_rate_basic & IWL_CCK_BASIC_RATES_MASK)
1153                 priv->staging_rxon.cck_basic_rates =
1154                     ((priv->active_rate_basic &
1155                       IWL_CCK_RATES_MASK) >> IWL_FIRST_CCK_RATE) & 0xF;
1156         else
1157                 priv->staging_rxon.cck_basic_rates =
1158                     (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
1159
1160         if (priv->active_rate_basic & IWL_OFDM_BASIC_RATES_MASK)
1161                 priv->staging_rxon.ofdm_basic_rates =
1162                     ((priv->active_rate_basic &
1163                       (IWL_OFDM_BASIC_RATES_MASK | IWL_RATE_6M_MASK)) >>
1164                       IWL_FIRST_OFDM_RATE) & 0xFF;
1165         else
1166                 priv->staging_rxon.ofdm_basic_rates =
1167                    (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
1168 }
1169 EXPORT_SYMBOL(iwl_set_rate);
1170
1171 void iwl_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
1172 {
1173         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
1174         struct iwl_rxon_cmd *rxon = (void *)&priv->active_rxon;
1175         struct iwl_csa_notification *csa = &(pkt->u.csa_notif);
1176         IWL_DEBUG_11H(priv, "CSA notif: channel %d, status %d\n",
1177                       le16_to_cpu(csa->channel), le32_to_cpu(csa->status));
1178         rxon->channel = csa->channel;
1179         priv->staging_rxon.channel = csa->channel;
1180 }
1181 EXPORT_SYMBOL(iwl_rx_csa);
1182
1183 #ifdef CONFIG_IWLWIFI_DEBUG
1184 static void iwl_print_rx_config_cmd(struct iwl_priv *priv)
1185 {
1186         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
1187
1188         IWL_DEBUG_RADIO(priv, "RX CONFIG:\n");
1189         iwl_print_hex_dump(priv, IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
1190         IWL_DEBUG_RADIO(priv, "u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
1191         IWL_DEBUG_RADIO(priv, "u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
1192         IWL_DEBUG_RADIO(priv, "u32 filter_flags: 0x%08x\n",
1193                         le32_to_cpu(rxon->filter_flags));
1194         IWL_DEBUG_RADIO(priv, "u8 dev_type: 0x%x\n", rxon->dev_type);
1195         IWL_DEBUG_RADIO(priv, "u8 ofdm_basic_rates: 0x%02x\n",
1196                         rxon->ofdm_basic_rates);
1197         IWL_DEBUG_RADIO(priv, "u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
1198         IWL_DEBUG_RADIO(priv, "u8[6] node_addr: %pM\n", rxon->node_addr);
1199         IWL_DEBUG_RADIO(priv, "u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
1200         IWL_DEBUG_RADIO(priv, "u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
1201 }
1202 #endif
1203
1204 /**
1205  * iwl_irq_handle_error - called for HW or SW error interrupt from card
1206  */
1207 void iwl_irq_handle_error(struct iwl_priv *priv)
1208 {
1209         /* Set the FW error flag -- cleared on iwl_down */
1210         set_bit(STATUS_FW_ERROR, &priv->status);
1211
1212         /* Cancel currently queued command. */
1213         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
1214
1215 #ifdef CONFIG_IWLWIFI_DEBUG
1216         if (priv->debug_level & IWL_DL_FW_ERRORS) {
1217                 iwl_dump_nic_error_log(priv);
1218                 iwl_dump_nic_event_log(priv);
1219                 iwl_print_rx_config_cmd(priv);
1220         }
1221 #endif
1222
1223         wake_up_interruptible(&priv->wait_command_queue);
1224
1225         /* Keep the restart process from trying to send host
1226          * commands by clearing the INIT status bit */
1227         clear_bit(STATUS_READY, &priv->status);
1228
1229         if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1230                 IWL_DEBUG(priv, IWL_DL_FW_ERRORS,
1231                           "Restarting adapter due to uCode error.\n");
1232
1233                 if (iwl_is_associated(priv)) {
1234                         memcpy(&priv->recovery_rxon, &priv->active_rxon,
1235                                sizeof(priv->recovery_rxon));
1236                         priv->error_recovering = 1;
1237                 }
1238                 if (priv->cfg->mod_params->restart_fw)
1239                         queue_work(priv->workqueue, &priv->restart);
1240         }
1241 }
1242 EXPORT_SYMBOL(iwl_irq_handle_error);
1243
1244 void iwl_configure_filter(struct ieee80211_hw *hw,
1245                           unsigned int changed_flags,
1246                           unsigned int *total_flags,
1247                           int mc_count, struct dev_addr_list *mc_list)
1248 {
1249         struct iwl_priv *priv = hw->priv;
1250         __le32 *filter_flags = &priv->staging_rxon.filter_flags;
1251
1252         IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
1253                         changed_flags, *total_flags);
1254
1255         if (changed_flags & (FIF_OTHER_BSS | FIF_PROMISC_IN_BSS)) {
1256                 if (*total_flags & (FIF_OTHER_BSS | FIF_PROMISC_IN_BSS))
1257                         *filter_flags |= RXON_FILTER_PROMISC_MSK;
1258                 else
1259                         *filter_flags &= ~RXON_FILTER_PROMISC_MSK;
1260         }
1261         if (changed_flags & FIF_ALLMULTI) {
1262                 if (*total_flags & FIF_ALLMULTI)
1263                         *filter_flags |= RXON_FILTER_ACCEPT_GRP_MSK;
1264                 else
1265                         *filter_flags &= ~RXON_FILTER_ACCEPT_GRP_MSK;
1266         }
1267         if (changed_flags & FIF_CONTROL) {
1268                 if (*total_flags & FIF_CONTROL)
1269                         *filter_flags |= RXON_FILTER_CTL2HOST_MSK;
1270                 else
1271                         *filter_flags &= ~RXON_FILTER_CTL2HOST_MSK;
1272         }
1273         if (changed_flags & FIF_BCN_PRBRESP_PROMISC) {
1274                 if (*total_flags & FIF_BCN_PRBRESP_PROMISC)
1275                         *filter_flags |= RXON_FILTER_BCON_AWARE_MSK;
1276                 else
1277                         *filter_flags &= ~RXON_FILTER_BCON_AWARE_MSK;
1278         }
1279
1280         /* We avoid iwl_commit_rxon here to commit the new filter flags
1281          * since mac80211 will call ieee80211_hw_config immediately.
1282          * (mc_list is not supported at this time). Otherwise, we need to
1283          * queue a background iwl_commit_rxon work.
1284          */
1285
1286         *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
1287                         FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
1288 }
1289 EXPORT_SYMBOL(iwl_configure_filter);
1290
1291 int iwl_setup_mac(struct iwl_priv *priv)
1292 {
1293         int ret;
1294         struct ieee80211_hw *hw = priv->hw;
1295         hw->rate_control_algorithm = "iwl-agn-rs";
1296
1297         /* Tell mac80211 our characteristics */
1298         hw->flags = IEEE80211_HW_SIGNAL_DBM |
1299                     IEEE80211_HW_NOISE_DBM |
1300                     IEEE80211_HW_AMPDU_AGGREGATION |
1301                     IEEE80211_HW_SPECTRUM_MGMT |
1302                     IEEE80211_HW_SUPPORTS_PS;
1303         hw->wiphy->interface_modes =
1304                 BIT(NL80211_IFTYPE_STATION) |
1305                 BIT(NL80211_IFTYPE_ADHOC);
1306
1307         hw->wiphy->custom_regulatory = true;
1308
1309         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
1310         /* we create the 802.11 header and a zero-length SSID element */
1311         hw->wiphy->max_scan_ie_len = IWL_MAX_PROBE_REQUEST - 24 - 2;
1312
1313         /* Default value; 4 EDCA QOS priorities */
1314         hw->queues = 4;
1315
1316         hw->conf.beacon_int = 100;
1317         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
1318
1319         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
1320                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
1321                         &priv->bands[IEEE80211_BAND_2GHZ];
1322         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
1323                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
1324                         &priv->bands[IEEE80211_BAND_5GHZ];
1325
1326         ret = ieee80211_register_hw(priv->hw);
1327         if (ret) {
1328                 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
1329                 return ret;
1330         }
1331         priv->mac80211_registered = 1;
1332
1333         return 0;
1334 }
1335 EXPORT_SYMBOL(iwl_setup_mac);
1336
1337 int iwl_set_hw_params(struct iwl_priv *priv)
1338 {
1339         priv->hw_params.sw_crypto = priv->cfg->mod_params->sw_crypto;
1340         priv->hw_params.max_rxq_size = RX_QUEUE_SIZE;
1341         priv->hw_params.max_rxq_log = RX_QUEUE_SIZE_LOG;
1342         if (priv->cfg->mod_params->amsdu_size_8K)
1343                 priv->hw_params.rx_buf_size = IWL_RX_BUF_SIZE_8K;
1344         else
1345                 priv->hw_params.rx_buf_size = IWL_RX_BUF_SIZE_4K;
1346         priv->hw_params.max_pkt_size = priv->hw_params.rx_buf_size - 256;
1347
1348         if (priv->cfg->mod_params->disable_11n)
1349                 priv->cfg->sku &= ~IWL_SKU_N;
1350
1351         /* Device-specific setup */
1352         return priv->cfg->ops->lib->set_hw_params(priv);
1353 }
1354 EXPORT_SYMBOL(iwl_set_hw_params);
1355
1356 int iwl_init_drv(struct iwl_priv *priv)
1357 {
1358         int ret;
1359
1360         priv->ibss_beacon = NULL;
1361
1362         spin_lock_init(&priv->lock);
1363         spin_lock_init(&priv->power_data.lock);
1364         spin_lock_init(&priv->sta_lock);
1365         spin_lock_init(&priv->hcmd_lock);
1366
1367         INIT_LIST_HEAD(&priv->free_frames);
1368
1369         mutex_init(&priv->mutex);
1370
1371         /* Clear the driver's (not device's) station table */
1372         priv->cfg->ops->smgmt->clear_station_table(priv);
1373
1374         priv->data_retry_limit = -1;
1375         priv->ieee_channels = NULL;
1376         priv->ieee_rates = NULL;
1377         priv->band = IEEE80211_BAND_2GHZ;
1378
1379         priv->iw_mode = NL80211_IFTYPE_STATION;
1380
1381         priv->current_ht_config.sm_ps = WLAN_HT_CAP_SM_PS_DISABLED;
1382
1383         /* Choose which receivers/antennas to use */
1384         if (priv->cfg->ops->hcmd->set_rxon_chain)
1385                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
1386
1387         iwl_init_scan_params(priv);
1388
1389         iwl_reset_qos(priv);
1390
1391         priv->qos_data.qos_active = 0;
1392         priv->qos_data.qos_cap.val = 0;
1393
1394         priv->rates_mask = IWL_RATES_MASK;
1395         /* If power management is turned on, default to CAM mode */
1396         priv->power_mode = IWL_POWER_MODE_CAM;
1397         priv->tx_power_user_lmt = IWL_TX_POWER_TARGET_POWER_MAX;
1398
1399         ret = iwl_init_channel_map(priv);
1400         if (ret) {
1401                 IWL_ERR(priv, "initializing regulatory failed: %d\n", ret);
1402                 goto err;
1403         }
1404
1405         ret = iwlcore_init_geos(priv);
1406         if (ret) {
1407                 IWL_ERR(priv, "initializing geos failed: %d\n", ret);
1408                 goto err_free_channel_map;
1409         }
1410         iwlcore_init_hw_rates(priv, priv->ieee_rates);
1411
1412         return 0;
1413
1414 err_free_channel_map:
1415         iwl_free_channel_map(priv);
1416 err:
1417         return ret;
1418 }
1419 EXPORT_SYMBOL(iwl_init_drv);
1420
1421 int iwl_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force)
1422 {
1423         int ret = 0;
1424         if (tx_power < IWL_TX_POWER_TARGET_POWER_MIN) {
1425                 IWL_WARN(priv, "Requested user TXPOWER %d below lower limit %d.\n",
1426                          tx_power,
1427                          IWL_TX_POWER_TARGET_POWER_MIN);
1428                 return -EINVAL;
1429         }
1430
1431         if (tx_power > IWL_TX_POWER_TARGET_POWER_MAX) {
1432                 IWL_WARN(priv, "Requested user TXPOWER %d above upper limit %d.\n",
1433                          tx_power,
1434                          IWL_TX_POWER_TARGET_POWER_MAX);
1435                 return -EINVAL;
1436         }
1437
1438         if (priv->tx_power_user_lmt != tx_power)
1439                 force = true;
1440
1441         priv->tx_power_user_lmt = tx_power;
1442
1443         /* if nic is not up don't send command */
1444         if (!iwl_is_ready_rf(priv))
1445                 return ret;
1446
1447         if (force && priv->cfg->ops->lib->send_tx_power)
1448                 ret = priv->cfg->ops->lib->send_tx_power(priv);
1449
1450         return ret;
1451 }
1452 EXPORT_SYMBOL(iwl_set_tx_power);
1453
1454 void iwl_uninit_drv(struct iwl_priv *priv)
1455 {
1456         iwl_calib_free_results(priv);
1457         iwlcore_free_geos(priv);
1458         iwl_free_channel_map(priv);
1459         kfree(priv->scan);
1460 }
1461 EXPORT_SYMBOL(iwl_uninit_drv);
1462
1463
1464 void iwl_disable_interrupts(struct iwl_priv *priv)
1465 {
1466         clear_bit(STATUS_INT_ENABLED, &priv->status);
1467
1468         /* disable interrupts from uCode/NIC to host */
1469         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
1470
1471         /* acknowledge/clear/reset any interrupts still pending
1472          * from uCode or flow handler (Rx/Tx DMA) */
1473         iwl_write32(priv, CSR_INT, 0xffffffff);
1474         iwl_write32(priv, CSR_FH_INT_STATUS, 0xffffffff);
1475         IWL_DEBUG_ISR(priv, "Disabled interrupts\n");
1476 }
1477 EXPORT_SYMBOL(iwl_disable_interrupts);
1478
1479 void iwl_enable_interrupts(struct iwl_priv *priv)
1480 {
1481         IWL_DEBUG_ISR(priv, "Enabling interrupts\n");
1482         set_bit(STATUS_INT_ENABLED, &priv->status);
1483         iwl_write32(priv, CSR_INT_MASK, CSR_INI_SET_MASK);
1484 }
1485 EXPORT_SYMBOL(iwl_enable_interrupts);
1486
1487 irqreturn_t iwl_isr(int irq, void *data)
1488 {
1489         struct iwl_priv *priv = data;
1490         u32 inta, inta_mask;
1491         u32 inta_fh;
1492         if (!priv)
1493                 return IRQ_NONE;
1494
1495         spin_lock(&priv->lock);
1496
1497         /* Disable (but don't clear!) interrupts here to avoid
1498          *    back-to-back ISRs and sporadic interrupts from our NIC.
1499          * If we have something to service, the tasklet will re-enable ints.
1500          * If we *don't* have something, we'll re-enable before leaving here. */
1501         inta_mask = iwl_read32(priv, CSR_INT_MASK);  /* just for debug */
1502         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
1503
1504         /* Discover which interrupts are active/pending */
1505         inta = iwl_read32(priv, CSR_INT);
1506         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1507
1508         /* Ignore interrupt if there's nothing in NIC to service.
1509          * This may be due to IRQ shared with another device,
1510          * or due to sporadic interrupts thrown from our NIC. */
1511         if (!inta && !inta_fh) {
1512                 IWL_DEBUG_ISR(priv, "Ignore interrupt, inta == 0, inta_fh == 0\n");
1513                 goto none;
1514         }
1515
1516         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
1517                 /* Hardware disappeared. It might have already raised
1518                  * an interrupt */
1519                 IWL_WARN(priv, "HARDWARE GONE?? INTA == 0x%08x\n", inta);
1520                 goto unplugged;
1521         }
1522
1523         IWL_DEBUG_ISR(priv, "ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1524                       inta, inta_mask, inta_fh);
1525
1526         inta &= ~CSR_INT_BIT_SCD;
1527
1528         /* iwl_irq_tasklet() will service interrupts and re-enable them */
1529         if (likely(inta || inta_fh))
1530                 tasklet_schedule(&priv->irq_tasklet);
1531
1532  unplugged:
1533         spin_unlock(&priv->lock);
1534         return IRQ_HANDLED;
1535
1536  none:
1537         /* re-enable interrupts here since we don't have anything to service. */
1538         /* only Re-enable if diabled by irq */
1539         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1540                 iwl_enable_interrupts(priv);
1541         spin_unlock(&priv->lock);
1542         return IRQ_NONE;
1543 }
1544 EXPORT_SYMBOL(iwl_isr);
1545
1546 int iwl_send_bt_config(struct iwl_priv *priv)
1547 {
1548         struct iwl_bt_cmd bt_cmd = {
1549                 .flags = 3,
1550                 .lead_time = 0xAA,
1551                 .max_kill = 1,
1552                 .kill_ack_mask = 0,
1553                 .kill_cts_mask = 0,
1554         };
1555
1556         return iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG,
1557                                 sizeof(struct iwl_bt_cmd), &bt_cmd);
1558 }
1559 EXPORT_SYMBOL(iwl_send_bt_config);
1560
1561 int iwl_send_statistics_request(struct iwl_priv *priv, u8 flags)
1562 {
1563         u32 stat_flags = 0;
1564         struct iwl_host_cmd cmd = {
1565                 .id = REPLY_STATISTICS_CMD,
1566                 .meta.flags = flags,
1567                 .len = sizeof(stat_flags),
1568                 .data = (u8 *) &stat_flags,
1569         };
1570         return iwl_send_cmd(priv, &cmd);
1571 }
1572 EXPORT_SYMBOL(iwl_send_statistics_request);
1573
1574 /**
1575  * iwl_verify_inst_sparse - verify runtime uCode image in card vs. host,
1576  *   using sample data 100 bytes apart.  If these sample points are good,
1577  *   it's a pretty good bet that everything between them is good, too.
1578  */
1579 static int iwlcore_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
1580 {
1581         u32 val;
1582         int ret = 0;
1583         u32 errcnt = 0;
1584         u32 i;
1585
1586         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
1587
1588         ret = iwl_grab_nic_access(priv);
1589         if (ret)
1590                 return ret;
1591
1592         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
1593                 /* read data comes through single port, auto-incr addr */
1594                 /* NOTE: Use the debugless read so we don't flood kernel log
1595                  * if IWL_DL_IO is set */
1596                 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
1597                         i + IWL49_RTC_INST_LOWER_BOUND);
1598                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1599                 if (val != le32_to_cpu(*image)) {
1600                         ret = -EIO;
1601                         errcnt++;
1602                         if (errcnt >= 3)
1603                                 break;
1604                 }
1605         }
1606
1607         iwl_release_nic_access(priv);
1608
1609         return ret;
1610 }
1611
1612 /**
1613  * iwlcore_verify_inst_full - verify runtime uCode image in card vs. host,
1614  *     looking at all data.
1615  */
1616 static int iwl_verify_inst_full(struct iwl_priv *priv, __le32 *image,
1617                                  u32 len)
1618 {
1619         u32 val;
1620         u32 save_len = len;
1621         int ret = 0;
1622         u32 errcnt;
1623
1624         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
1625
1626         ret = iwl_grab_nic_access(priv);
1627         if (ret)
1628                 return ret;
1629
1630         iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
1631                            IWL49_RTC_INST_LOWER_BOUND);
1632
1633         errcnt = 0;
1634         for (; len > 0; len -= sizeof(u32), image++) {
1635                 /* read data comes through single port, auto-incr addr */
1636                 /* NOTE: Use the debugless read so we don't flood kernel log
1637                  * if IWL_DL_IO is set */
1638                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1639                 if (val != le32_to_cpu(*image)) {
1640                         IWL_ERR(priv, "uCode INST section is invalid at "
1641                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
1642                                   save_len - len, val, le32_to_cpu(*image));
1643                         ret = -EIO;
1644                         errcnt++;
1645                         if (errcnt >= 20)
1646                                 break;
1647                 }
1648         }
1649
1650         iwl_release_nic_access(priv);
1651
1652         if (!errcnt)
1653                 IWL_DEBUG_INFO(priv,
1654                     "ucode image in INSTRUCTION memory is good\n");
1655
1656         return ret;
1657 }
1658
1659 /**
1660  * iwl_verify_ucode - determine which instruction image is in SRAM,
1661  *    and verify its contents
1662  */
1663 int iwl_verify_ucode(struct iwl_priv *priv)
1664 {
1665         __le32 *image;
1666         u32 len;
1667         int ret;
1668
1669         /* Try bootstrap */
1670         image = (__le32 *)priv->ucode_boot.v_addr;
1671         len = priv->ucode_boot.len;
1672         ret = iwlcore_verify_inst_sparse(priv, image, len);
1673         if (!ret) {
1674                 IWL_DEBUG_INFO(priv, "Bootstrap uCode is good in inst SRAM\n");
1675                 return 0;
1676         }
1677
1678         /* Try initialize */
1679         image = (__le32 *)priv->ucode_init.v_addr;
1680         len = priv->ucode_init.len;
1681         ret = iwlcore_verify_inst_sparse(priv, image, len);
1682         if (!ret) {
1683                 IWL_DEBUG_INFO(priv, "Initialize uCode is good in inst SRAM\n");
1684                 return 0;
1685         }
1686
1687         /* Try runtime/protocol */
1688         image = (__le32 *)priv->ucode_code.v_addr;
1689         len = priv->ucode_code.len;
1690         ret = iwlcore_verify_inst_sparse(priv, image, len);
1691         if (!ret) {
1692                 IWL_DEBUG_INFO(priv, "Runtime uCode is good in inst SRAM\n");
1693                 return 0;
1694         }
1695
1696         IWL_ERR(priv, "NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
1697
1698         /* Since nothing seems to match, show first several data entries in
1699          * instruction SRAM, so maybe visual inspection will give a clue.
1700          * Selection of bootstrap image (vs. other images) is arbitrary. */
1701         image = (__le32 *)priv->ucode_boot.v_addr;
1702         len = priv->ucode_boot.len;
1703         ret = iwl_verify_inst_full(priv, image, len);
1704
1705         return ret;
1706 }
1707 EXPORT_SYMBOL(iwl_verify_ucode);
1708
1709
1710 static const char *desc_lookup_text[] = {
1711         "OK",
1712         "FAIL",
1713         "BAD_PARAM",
1714         "BAD_CHECKSUM",
1715         "NMI_INTERRUPT_WDG",
1716         "SYSASSERT",
1717         "FATAL_ERROR",
1718         "BAD_COMMAND",
1719         "HW_ERROR_TUNE_LOCK",
1720         "HW_ERROR_TEMPERATURE",
1721         "ILLEGAL_CHAN_FREQ",
1722         "VCC_NOT_STABLE",
1723         "FH_ERROR",
1724         "NMI_INTERRUPT_HOST",
1725         "NMI_INTERRUPT_ACTION_PT",
1726         "NMI_INTERRUPT_UNKNOWN",
1727         "UCODE_VERSION_MISMATCH",
1728         "HW_ERROR_ABS_LOCK",
1729         "HW_ERROR_CAL_LOCK_FAIL",
1730         "NMI_INTERRUPT_INST_ACTION_PT",
1731         "NMI_INTERRUPT_DATA_ACTION_PT",
1732         "NMI_TRM_HW_ER",
1733         "NMI_INTERRUPT_TRM",
1734         "NMI_INTERRUPT_BREAK_POINT"
1735         "DEBUG_0",
1736         "DEBUG_1",
1737         "DEBUG_2",
1738         "DEBUG_3",
1739         "UNKNOWN"
1740 };
1741
1742 static const char *desc_lookup(int i)
1743 {
1744         int max = ARRAY_SIZE(desc_lookup_text) - 1;
1745
1746         if (i < 0 || i > max)
1747                 i = max;
1748
1749         return desc_lookup_text[i];
1750 }
1751
1752 #define ERROR_START_OFFSET  (1 * sizeof(u32))
1753 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
1754
1755 void iwl_dump_nic_error_log(struct iwl_priv *priv)
1756 {
1757         u32 data2, line;
1758         u32 desc, time, count, base, data1;
1759         u32 blink1, blink2, ilink1, ilink2;
1760         int ret;
1761
1762         if (priv->ucode_type == UCODE_INIT)
1763                 base = le32_to_cpu(priv->card_alive_init.error_event_table_ptr);
1764         else
1765                 base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
1766
1767         if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
1768                 IWL_ERR(priv, "Not valid error log pointer 0x%08X\n", base);
1769                 return;
1770         }
1771
1772         ret = iwl_grab_nic_access(priv);
1773         if (ret) {
1774                 IWL_WARN(priv, "Can not read from adapter at this time.\n");
1775                 return;
1776         }
1777
1778         count = iwl_read_targ_mem(priv, base);
1779
1780         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
1781                 IWL_ERR(priv, "Start IWL Error Log Dump:\n");
1782                 IWL_ERR(priv, "Status: 0x%08lX, count: %d\n",
1783                         priv->status, count);
1784         }
1785
1786         desc = iwl_read_targ_mem(priv, base + 1 * sizeof(u32));
1787         blink1 = iwl_read_targ_mem(priv, base + 3 * sizeof(u32));
1788         blink2 = iwl_read_targ_mem(priv, base + 4 * sizeof(u32));
1789         ilink1 = iwl_read_targ_mem(priv, base + 5 * sizeof(u32));
1790         ilink2 = iwl_read_targ_mem(priv, base + 6 * sizeof(u32));
1791         data1 = iwl_read_targ_mem(priv, base + 7 * sizeof(u32));
1792         data2 = iwl_read_targ_mem(priv, base + 8 * sizeof(u32));
1793         line = iwl_read_targ_mem(priv, base + 9 * sizeof(u32));
1794         time = iwl_read_targ_mem(priv, base + 11 * sizeof(u32));
1795
1796         IWL_ERR(priv, "Desc                               Time       "
1797                 "data1      data2      line\n");
1798         IWL_ERR(priv, "%-28s (#%02d) %010u 0x%08X 0x%08X %u\n",
1799                 desc_lookup(desc), desc, time, data1, data2, line);
1800         IWL_ERR(priv, "blink1  blink2  ilink1  ilink2\n");
1801         IWL_ERR(priv, "0x%05X 0x%05X 0x%05X 0x%05X\n", blink1, blink2,
1802                 ilink1, ilink2);
1803
1804         iwl_release_nic_access(priv);
1805 }
1806 EXPORT_SYMBOL(iwl_dump_nic_error_log);
1807
1808 #define EVENT_START_OFFSET  (4 * sizeof(u32))
1809
1810 /**
1811  * iwl_print_event_log - Dump error event log to syslog
1812  *
1813  * NOTE: Must be called with iwl_grab_nic_access() already obtained!
1814  */
1815 static void iwl_print_event_log(struct iwl_priv *priv, u32 start_idx,
1816                                 u32 num_events, u32 mode)
1817 {
1818         u32 i;
1819         u32 base;       /* SRAM byte address of event log header */
1820         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
1821         u32 ptr;        /* SRAM byte address of log data */
1822         u32 ev, time, data; /* event log data */
1823
1824         if (num_events == 0)
1825                 return;
1826         if (priv->ucode_type == UCODE_INIT)
1827                 base = le32_to_cpu(priv->card_alive_init.log_event_table_ptr);
1828         else
1829                 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1830
1831         if (mode == 0)
1832                 event_size = 2 * sizeof(u32);
1833         else
1834                 event_size = 3 * sizeof(u32);
1835
1836         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
1837
1838         /* "time" is actually "data" for mode 0 (no timestamp).
1839         * place event id # at far right for easier visual parsing. */
1840         for (i = 0; i < num_events; i++) {
1841                 ev = iwl_read_targ_mem(priv, ptr);
1842                 ptr += sizeof(u32);
1843                 time = iwl_read_targ_mem(priv, ptr);
1844                 ptr += sizeof(u32);
1845                 if (mode == 0) {
1846                         /* data, ev */
1847                         IWL_ERR(priv, "EVT_LOG:0x%08x:%04u\n", time, ev);
1848                 } else {
1849                         data = iwl_read_targ_mem(priv, ptr);
1850                         ptr += sizeof(u32);
1851                         IWL_ERR(priv, "EVT_LOGT:%010u:0x%08x:%04u\n",
1852                                         time, data, ev);
1853                 }
1854         }
1855 }
1856
1857 void iwl_dump_nic_event_log(struct iwl_priv *priv)
1858 {
1859         int ret;
1860         u32 base;       /* SRAM byte address of event log header */
1861         u32 capacity;   /* event log capacity in # entries */
1862         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
1863         u32 num_wraps;  /* # times uCode wrapped to top of log */
1864         u32 next_entry; /* index of next entry to be written by uCode */
1865         u32 size;       /* # entries that we'll print */
1866
1867         if (priv->ucode_type == UCODE_INIT)
1868                 base = le32_to_cpu(priv->card_alive_init.log_event_table_ptr);
1869         else
1870                 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1871
1872         if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
1873                 IWL_ERR(priv, "Invalid event log pointer 0x%08X\n", base);
1874                 return;
1875         }
1876
1877         ret = iwl_grab_nic_access(priv);
1878         if (ret) {
1879                 IWL_WARN(priv, "Can not read from adapter at this time.\n");
1880                 return;
1881         }
1882
1883         /* event log header */
1884         capacity = iwl_read_targ_mem(priv, base);
1885         mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
1886         num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
1887         next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
1888
1889         size = num_wraps ? capacity : next_entry;
1890
1891         /* bail out if nothing in log */
1892         if (size == 0) {
1893                 IWL_ERR(priv, "Start IWL Event Log Dump: nothing in log\n");
1894                 iwl_release_nic_access(priv);
1895                 return;
1896         }
1897
1898         IWL_ERR(priv, "Start IWL Event Log Dump: display count %d, wraps %d\n",
1899                         size, num_wraps);
1900
1901         /* if uCode has wrapped back to top of log, start at the oldest entry,
1902          * i.e the next one that uCode would fill. */
1903         if (num_wraps)
1904                 iwl_print_event_log(priv, next_entry,
1905                                         capacity - next_entry, mode);
1906         /* (then/else) start at top of log */
1907         iwl_print_event_log(priv, 0, next_entry, mode);
1908
1909         iwl_release_nic_access(priv);
1910 }
1911 EXPORT_SYMBOL(iwl_dump_nic_event_log);
1912
1913 void iwl_rf_kill_ct_config(struct iwl_priv *priv)
1914 {
1915         struct iwl_ct_kill_config cmd;
1916         unsigned long flags;
1917         int ret = 0;
1918
1919         spin_lock_irqsave(&priv->lock, flags);
1920         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
1921                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
1922         spin_unlock_irqrestore(&priv->lock, flags);
1923
1924         cmd.critical_temperature_R =
1925                 cpu_to_le32(priv->hw_params.ct_kill_threshold);
1926
1927         ret = iwl_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD,
1928                                sizeof(cmd), &cmd);
1929         if (ret)
1930                 IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
1931         else
1932                 IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD succeeded, "
1933                         "critical temperature is %d\n",
1934                         cmd.critical_temperature_R);
1935 }
1936 EXPORT_SYMBOL(iwl_rf_kill_ct_config);
1937
1938
1939 /*
1940  * CARD_STATE_CMD
1941  *
1942  * Use: Sets the device's internal card state to enable, disable, or halt
1943  *
1944  * When in the 'enable' state the card operates as normal.
1945  * When in the 'disable' state, the card enters into a low power mode.
1946  * When in the 'halt' state, the card is shut down and must be fully
1947  * restarted to come back on.
1948  */
1949 int iwl_send_card_state(struct iwl_priv *priv, u32 flags, u8 meta_flag)
1950 {
1951         struct iwl_host_cmd cmd = {
1952                 .id = REPLY_CARD_STATE_CMD,
1953                 .len = sizeof(u32),
1954                 .data = &flags,
1955                 .meta.flags = meta_flag,
1956         };
1957
1958         return iwl_send_cmd(priv, &cmd);
1959 }
1960 EXPORT_SYMBOL(iwl_send_card_state);
1961
1962 void iwl_radio_kill_sw_disable_radio(struct iwl_priv *priv)
1963 {
1964         unsigned long flags;
1965
1966         if (test_bit(STATUS_RF_KILL_SW, &priv->status))
1967                 return;
1968
1969         IWL_DEBUG_RF_KILL(priv, "Manual SW RF KILL set to: RADIO OFF\n");
1970
1971         iwl_scan_cancel(priv);
1972         /* FIXME: This is a workaround for AP */
1973         if (priv->iw_mode != NL80211_IFTYPE_AP) {
1974                 spin_lock_irqsave(&priv->lock, flags);
1975                 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
1976                             CSR_UCODE_SW_BIT_RFKILL);
1977                 spin_unlock_irqrestore(&priv->lock, flags);
1978                 /* call the host command only if no hw rf-kill set */
1979                 if (!test_bit(STATUS_RF_KILL_HW, &priv->status) &&
1980                     iwl_is_ready(priv))
1981                         iwl_send_card_state(priv,
1982                                 CARD_STATE_CMD_DISABLE, 0);
1983                 set_bit(STATUS_RF_KILL_SW, &priv->status);
1984                         /* make sure mac80211 stop sending Tx frame */
1985                 if (priv->mac80211_registered)
1986                         ieee80211_stop_queues(priv->hw);
1987         }
1988 }
1989 EXPORT_SYMBOL(iwl_radio_kill_sw_disable_radio);
1990
1991 int iwl_radio_kill_sw_enable_radio(struct iwl_priv *priv)
1992 {
1993         unsigned long flags;
1994
1995         if (!test_bit(STATUS_RF_KILL_SW, &priv->status))
1996                 return 0;
1997
1998         IWL_DEBUG_RF_KILL(priv, "Manual SW RF KILL set to: RADIO ON\n");
1999
2000         spin_lock_irqsave(&priv->lock, flags);
2001         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
2002
2003         /* If the driver is up it will receive CARD_STATE_NOTIFICATION
2004          * notification where it will clear SW rfkill status.
2005          * Setting it here would break the handler. Only if the
2006          * interface is down we can set here since we don't
2007          * receive any further notification.
2008          */
2009         if (!priv->is_open)
2010                 clear_bit(STATUS_RF_KILL_SW, &priv->status);
2011         spin_unlock_irqrestore(&priv->lock, flags);
2012
2013         /* wake up ucode */
2014         msleep(10);
2015
2016         spin_lock_irqsave(&priv->lock, flags);
2017         iwl_read32(priv, CSR_UCODE_DRV_GP1);
2018         if (!iwl_grab_nic_access(priv))
2019                 iwl_release_nic_access(priv);
2020         spin_unlock_irqrestore(&priv->lock, flags);
2021
2022         if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
2023                 IWL_DEBUG_RF_KILL(priv, "Can not turn radio back on - "
2024                                   "disabled by HW switch\n");
2025                 return 0;
2026         }
2027
2028         /* when driver is up while rfkill is on, it wont receive
2029          * any CARD_STATE_NOTIFICATION notifications so we have to
2030          * restart it in here
2031          */
2032         if (priv->is_open && !test_bit(STATUS_ALIVE, &priv->status)) {
2033                 clear_bit(STATUS_RF_KILL_SW, &priv->status);
2034                 if (!iwl_is_rfkill(priv))
2035                         queue_work(priv->workqueue, &priv->up);
2036         }
2037
2038         /* If the driver is already loaded, it will receive
2039          * CARD_STATE_NOTIFICATION notifications and the handler will
2040          * call restart to reload the driver.
2041          */
2042         return 1;
2043 }
2044 EXPORT_SYMBOL(iwl_radio_kill_sw_enable_radio);
2045
2046 void iwl_bg_rf_kill(struct work_struct *work)
2047 {
2048         struct iwl_priv *priv = container_of(work, struct iwl_priv, rf_kill);
2049
2050         wake_up_interruptible(&priv->wait_command_queue);
2051
2052         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2053                 return;
2054
2055         mutex_lock(&priv->mutex);
2056
2057         if (!iwl_is_rfkill(priv)) {
2058                 IWL_DEBUG_RF_KILL(priv,
2059                           "HW and/or SW RF Kill no longer active, restarting "
2060                           "device\n");
2061                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status) &&
2062                     priv->is_open)
2063                         queue_work(priv->workqueue, &priv->restart);
2064         } else {
2065                 /* make sure mac80211 stop sending Tx frame */
2066                 if (priv->mac80211_registered)
2067                         ieee80211_stop_queues(priv->hw);
2068
2069                 if (!test_bit(STATUS_RF_KILL_HW, &priv->status))
2070                         IWL_DEBUG_RF_KILL(priv, "Can not turn radio back on - "
2071                                           "disabled by SW switch\n");
2072                 else
2073                         IWL_WARN(priv, "Radio Frequency Kill Switch is On:\n"
2074                                     "Kill switch must be turned off for "
2075                                     "wireless networking to work.\n");
2076         }
2077         mutex_unlock(&priv->mutex);
2078         iwl_rfkill_set_hw_state(priv);
2079 }
2080 EXPORT_SYMBOL(iwl_bg_rf_kill);
2081
2082 void iwl_rx_pm_sleep_notif(struct iwl_priv *priv,
2083                            struct iwl_rx_mem_buffer *rxb)
2084 {
2085 #ifdef CONFIG_IWLWIFI_DEBUG
2086         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2087         struct iwl_sleep_notification *sleep = &(pkt->u.sleep_notif);
2088         IWL_DEBUG_RX(priv, "sleep mode: %d, src: %d\n",
2089                      sleep->pm_sleep_mode, sleep->pm_wakeup_src);
2090 #endif
2091 }
2092 EXPORT_SYMBOL(iwl_rx_pm_sleep_notif);
2093
2094 void iwl_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
2095                                       struct iwl_rx_mem_buffer *rxb)
2096 {
2097         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2098         IWL_DEBUG_RADIO(priv, "Dumping %d bytes of unhandled "
2099                         "notification for %s:\n",
2100                         le32_to_cpu(pkt->len), get_cmd_string(pkt->hdr.cmd));
2101         iwl_print_hex_dump(priv, IWL_DL_RADIO, pkt->u.raw, le32_to_cpu(pkt->len));
2102 }
2103 EXPORT_SYMBOL(iwl_rx_pm_debug_statistics_notif);
2104
2105 void iwl_rx_reply_error(struct iwl_priv *priv,
2106                         struct iwl_rx_mem_buffer *rxb)
2107 {
2108         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2109
2110         IWL_ERR(priv, "Error Reply type 0x%08X cmd %s (0x%02X) "
2111                 "seq 0x%04X ser 0x%08X\n",
2112                 le32_to_cpu(pkt->u.err_resp.error_type),
2113                 get_cmd_string(pkt->u.err_resp.cmd_id),
2114                 pkt->u.err_resp.cmd_id,
2115                 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
2116                 le32_to_cpu(pkt->u.err_resp.error_info));
2117 }
2118 EXPORT_SYMBOL(iwl_rx_reply_error);
2119
2120 void iwl_clear_isr_stats(struct iwl_priv *priv)
2121 {
2122         memset(&priv->isr_stats, 0, sizeof(priv->isr_stats));
2123 }
2124 EXPORT_SYMBOL(iwl_clear_isr_stats);
2125
2126 int iwl_mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
2127                            const struct ieee80211_tx_queue_params *params)
2128 {
2129         struct iwl_priv *priv = hw->priv;
2130         unsigned long flags;
2131         int q;
2132
2133         IWL_DEBUG_MAC80211(priv, "enter\n");
2134
2135         if (!iwl_is_ready_rf(priv)) {
2136                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
2137                 return -EIO;
2138         }
2139
2140         if (queue >= AC_NUM) {
2141                 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
2142                 return 0;
2143         }
2144
2145         q = AC_NUM - 1 - queue;
2146
2147         spin_lock_irqsave(&priv->lock, flags);
2148
2149         priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
2150         priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
2151         priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
2152         priv->qos_data.def_qos_parm.ac[q].edca_txop =
2153                         cpu_to_le16((params->txop * 32));
2154
2155         priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
2156         priv->qos_data.qos_active = 1;
2157
2158         if (priv->iw_mode == NL80211_IFTYPE_AP)
2159                 iwl_activate_qos(priv, 1);
2160         else if (priv->assoc_id && iwl_is_associated(priv))
2161                 iwl_activate_qos(priv, 0);
2162
2163         spin_unlock_irqrestore(&priv->lock, flags);
2164
2165         IWL_DEBUG_MAC80211(priv, "leave\n");
2166         return 0;
2167 }
2168 EXPORT_SYMBOL(iwl_mac_conf_tx);
2169
2170 static void iwl_ht_conf(struct iwl_priv *priv,
2171                             struct ieee80211_bss_conf *bss_conf)
2172 {
2173         struct ieee80211_sta_ht_cap *ht_conf;
2174         struct iwl_ht_info *iwl_conf = &priv->current_ht_config;
2175         struct ieee80211_sta *sta;
2176
2177         IWL_DEBUG_MAC80211(priv, "enter: \n");
2178
2179         if (!iwl_conf->is_ht)
2180                 return;
2181
2182
2183         /*
2184          * It is totally wrong to base global information on something
2185          * that is valid only when associated, alas, this driver works
2186          * that way and I don't know how to fix it.
2187          */
2188
2189         rcu_read_lock();
2190         sta = ieee80211_find_sta(priv->hw, priv->bssid);
2191         if (!sta) {
2192                 rcu_read_unlock();
2193                 return;
2194         }
2195         ht_conf = &sta->ht_cap;
2196
2197         if (ht_conf->cap & IEEE80211_HT_CAP_SGI_20)
2198                 iwl_conf->sgf |= HT_SHORT_GI_20MHZ;
2199         if (ht_conf->cap & IEEE80211_HT_CAP_SGI_40)
2200                 iwl_conf->sgf |= HT_SHORT_GI_40MHZ;
2201
2202         iwl_conf->is_green_field = !!(ht_conf->cap & IEEE80211_HT_CAP_GRN_FLD);
2203         iwl_conf->max_amsdu_size =
2204                 !!(ht_conf->cap & IEEE80211_HT_CAP_MAX_AMSDU);
2205
2206         iwl_conf->supported_chan_width =
2207                 !!(ht_conf->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40);
2208
2209         /*
2210          * XXX: The HT configuration needs to be moved into iwl_mac_config()
2211          *      to be done there correctly.
2212          */
2213
2214         iwl_conf->extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE;
2215         if (conf_is_ht40_minus(&priv->hw->conf))
2216                 iwl_conf->extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2217         else if (conf_is_ht40_plus(&priv->hw->conf))
2218                 iwl_conf->extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2219
2220         /* If no above or below channel supplied disable FAT channel */
2221         if (iwl_conf->extension_chan_offset != IEEE80211_HT_PARAM_CHA_SEC_ABOVE &&
2222             iwl_conf->extension_chan_offset != IEEE80211_HT_PARAM_CHA_SEC_BELOW)
2223                 iwl_conf->supported_chan_width = 0;
2224
2225         iwl_conf->sm_ps = (u8)((ht_conf->cap & IEEE80211_HT_CAP_SM_PS) >> 2);
2226
2227         memcpy(&iwl_conf->mcs, &ht_conf->mcs, 16);
2228
2229         iwl_conf->tx_chan_width = iwl_conf->supported_chan_width != 0;
2230         iwl_conf->ht_protection =
2231                 bss_conf->ht.operation_mode & IEEE80211_HT_OP_MODE_PROTECTION;
2232         iwl_conf->non_GF_STA_present =
2233                 !!(bss_conf->ht.operation_mode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
2234
2235         rcu_read_unlock();
2236
2237         IWL_DEBUG_MAC80211(priv, "leave\n");
2238 }
2239
2240 #define IWL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6)
2241 void iwl_bss_info_changed(struct ieee80211_hw *hw,
2242                                      struct ieee80211_vif *vif,
2243                                      struct ieee80211_bss_conf *bss_conf,
2244                                      u32 changes)
2245 {
2246         struct iwl_priv *priv = hw->priv;
2247         int ret;
2248
2249         IWL_DEBUG_MAC80211(priv, "changes = 0x%X\n", changes);
2250
2251         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
2252                 IWL_DEBUG_MAC80211(priv, "ERP_PREAMBLE %d\n",
2253                                    bss_conf->use_short_preamble);
2254                 if (bss_conf->use_short_preamble)
2255                         priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2256                 else
2257                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2258         }
2259
2260         if (changes & BSS_CHANGED_ERP_CTS_PROT) {
2261                 IWL_DEBUG_MAC80211(priv, "ERP_CTS %d\n", bss_conf->use_cts_prot);
2262                 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
2263                         priv->staging_rxon.flags |= RXON_FLG_TGG_PROTECT_MSK;
2264                 else
2265                         priv->staging_rxon.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
2266         }
2267
2268         if (changes & BSS_CHANGED_HT) {
2269                 iwl_ht_conf(priv, bss_conf);
2270
2271                 if (priv->cfg->ops->hcmd->set_rxon_chain)
2272                         priv->cfg->ops->hcmd->set_rxon_chain(priv);
2273         }
2274
2275         if (changes & BSS_CHANGED_ASSOC) {
2276                 IWL_DEBUG_MAC80211(priv, "ASSOC %d\n", bss_conf->assoc);
2277                 /* This should never happen as this function should
2278                  * never be called from interrupt context. */
2279                 if (WARN_ON_ONCE(in_interrupt()))
2280                         return;
2281                 if (bss_conf->assoc) {
2282                         priv->assoc_id = bss_conf->aid;
2283                         priv->beacon_int = bss_conf->beacon_int;
2284                         priv->power_data.dtim_period = bss_conf->dtim_period;
2285                         priv->timestamp = bss_conf->timestamp;
2286                         priv->assoc_capability = bss_conf->assoc_capability;
2287
2288                         /* we have just associated, don't start scan too early
2289                          * leave time for EAPOL exchange to complete
2290                          */
2291                         priv->next_scan_jiffies = jiffies +
2292                                         IWL_DELAY_NEXT_SCAN_AFTER_ASSOC;
2293                         mutex_lock(&priv->mutex);
2294                         priv->cfg->ops->lib->post_associate(priv);
2295                         mutex_unlock(&priv->mutex);
2296                 } else {
2297                         priv->assoc_id = 0;
2298                         IWL_DEBUG_MAC80211(priv, "DISASSOC %d\n", bss_conf->assoc);
2299                 }
2300         } else if (changes && iwl_is_associated(priv) && priv->assoc_id) {
2301                         IWL_DEBUG_MAC80211(priv, "Associated Changes %d\n", changes);
2302                         ret = iwl_send_rxon_assoc(priv);
2303                         if (!ret)
2304                                 /* Sync active_rxon with latest change. */
2305                                 memcpy((void *)&priv->active_rxon,
2306                                         &priv->staging_rxon,
2307                                         sizeof(struct iwl_rxon_cmd));
2308         }
2309
2310 }
2311 EXPORT_SYMBOL(iwl_bss_info_changed);
2312
2313 int iwl_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb)
2314 {
2315         struct iwl_priv *priv = hw->priv;
2316         unsigned long flags;
2317         __le64 timestamp;
2318
2319         IWL_DEBUG_MAC80211(priv, "enter\n");
2320
2321         if (!iwl_is_ready_rf(priv)) {
2322                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
2323                 return -EIO;
2324         }
2325
2326         if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
2327                 IWL_DEBUG_MAC80211(priv, "leave - not IBSS\n");
2328                 return -EIO;
2329         }
2330
2331         spin_lock_irqsave(&priv->lock, flags);
2332
2333         if (priv->ibss_beacon)
2334                 dev_kfree_skb(priv->ibss_beacon);
2335
2336         priv->ibss_beacon = skb;
2337
2338         priv->assoc_id = 0;
2339         timestamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
2340         priv->timestamp = le64_to_cpu(timestamp);
2341
2342         IWL_DEBUG_MAC80211(priv, "leave\n");
2343         spin_unlock_irqrestore(&priv->lock, flags);
2344
2345         iwl_reset_qos(priv);
2346
2347         priv->cfg->ops->lib->post_associate(priv);
2348
2349
2350         return 0;
2351 }
2352 EXPORT_SYMBOL(iwl_mac_beacon_update);
2353
2354 int iwl_set_mode(struct iwl_priv *priv, int mode)
2355 {
2356         if (mode == NL80211_IFTYPE_ADHOC) {
2357                 const struct iwl_channel_info *ch_info;
2358
2359                 ch_info = iwl_get_channel_info(priv,
2360                         priv->band,
2361                         le16_to_cpu(priv->staging_rxon.channel));
2362
2363                 if (!ch_info || !is_channel_ibss(ch_info)) {
2364                         IWL_ERR(priv, "channel %d not IBSS channel\n",
2365                                   le16_to_cpu(priv->staging_rxon.channel));
2366                         return -EINVAL;
2367                 }
2368         }
2369
2370         iwl_connection_init_rx_config(priv, mode);
2371
2372         if (priv->cfg->ops->hcmd->set_rxon_chain)
2373                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
2374
2375         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2376
2377         priv->cfg->ops->smgmt->clear_station_table(priv);
2378
2379         /* dont commit rxon if rf-kill is on*/
2380         if (!iwl_is_ready_rf(priv))
2381                 return -EAGAIN;
2382
2383         cancel_delayed_work(&priv->scan_check);
2384         if (iwl_scan_cancel_timeout(priv, 100)) {
2385                 IWL_WARN(priv, "Aborted scan still in progress after 100ms\n");
2386                 IWL_DEBUG_MAC80211(priv, "leaving - scan abort failed.\n");
2387                 return -EAGAIN;
2388         }
2389
2390         iwlcore_commit_rxon(priv);
2391
2392         return 0;
2393 }
2394 EXPORT_SYMBOL(iwl_set_mode);
2395
2396 int iwl_mac_add_interface(struct ieee80211_hw *hw,
2397                                  struct ieee80211_if_init_conf *conf)
2398 {
2399         struct iwl_priv *priv = hw->priv;
2400         unsigned long flags;
2401
2402         IWL_DEBUG_MAC80211(priv, "enter: type %d\n", conf->type);
2403
2404         if (priv->vif) {
2405                 IWL_DEBUG_MAC80211(priv, "leave - vif != NULL\n");
2406                 return -EOPNOTSUPP;
2407         }
2408
2409         spin_lock_irqsave(&priv->lock, flags);
2410         priv->vif = conf->vif;
2411         priv->iw_mode = conf->type;
2412
2413         spin_unlock_irqrestore(&priv->lock, flags);
2414
2415         mutex_lock(&priv->mutex);
2416
2417         if (conf->mac_addr) {
2418                 IWL_DEBUG_MAC80211(priv, "Set %pM\n", conf->mac_addr);
2419                 memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
2420         }
2421
2422         if (iwl_set_mode(priv, conf->type) == -EAGAIN)
2423                 /* we are not ready, will run again when ready */
2424                 set_bit(STATUS_MODE_PENDING, &priv->status);
2425
2426         mutex_unlock(&priv->mutex);
2427
2428         IWL_DEBUG_MAC80211(priv, "leave\n");
2429         return 0;
2430 }
2431 EXPORT_SYMBOL(iwl_mac_add_interface);
2432
2433 void iwl_mac_remove_interface(struct ieee80211_hw *hw,
2434                                      struct ieee80211_if_init_conf *conf)
2435 {
2436         struct iwl_priv *priv = hw->priv;
2437
2438         IWL_DEBUG_MAC80211(priv, "enter\n");
2439
2440         mutex_lock(&priv->mutex);
2441
2442         if (iwl_is_ready_rf(priv)) {
2443                 iwl_scan_cancel_timeout(priv, 100);
2444                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2445                 iwlcore_commit_rxon(priv);
2446         }
2447         if (priv->vif == conf->vif) {
2448                 priv->vif = NULL;
2449                 memset(priv->bssid, 0, ETH_ALEN);
2450         }
2451         mutex_unlock(&priv->mutex);
2452
2453         IWL_DEBUG_MAC80211(priv, "leave\n");
2454
2455 }
2456 EXPORT_SYMBOL(iwl_mac_remove_interface);
2457
2458 /**
2459  * iwl_mac_config - mac80211 config callback
2460  *
2461  * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
2462  * be set inappropriately and the driver currently sets the hardware up to
2463  * use it whenever needed.
2464  */
2465 int iwl_mac_config(struct ieee80211_hw *hw, u32 changed)
2466 {
2467         struct iwl_priv *priv = hw->priv;
2468         const struct iwl_channel_info *ch_info;
2469         struct ieee80211_conf *conf = &hw->conf;
2470         unsigned long flags = 0;
2471         int ret = 0;
2472         u16 ch;
2473         int scan_active = 0;
2474
2475         mutex_lock(&priv->mutex);
2476
2477         IWL_DEBUG_MAC80211(priv, "enter to channel %d changed 0x%X\n",
2478                                         conf->channel->hw_value, changed);
2479
2480         if (unlikely(!priv->cfg->mod_params->disable_hw_scan &&
2481                         test_bit(STATUS_SCANNING, &priv->status))) {
2482                 scan_active = 1;
2483                 IWL_DEBUG_MAC80211(priv, "leave - scanning\n");
2484         }
2485
2486
2487         /* during scanning mac80211 will delay channel setting until
2488          * scan finish with changed = 0
2489          */
2490         if (!changed || (changed & IEEE80211_CONF_CHANGE_CHANNEL)) {
2491                 if (scan_active)
2492                         goto set_ch_out;
2493
2494                 ch = ieee80211_frequency_to_channel(conf->channel->center_freq);
2495                 ch_info = iwl_get_channel_info(priv, conf->channel->band, ch);
2496                 if (!is_channel_valid(ch_info)) {
2497                         IWL_DEBUG_MAC80211(priv, "leave - invalid channel\n");
2498                         ret = -EINVAL;
2499                         goto set_ch_out;
2500                 }
2501
2502                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC &&
2503                         !is_channel_ibss(ch_info)) {
2504                         IWL_ERR(priv, "channel %d in band %d not "
2505                                 "IBSS channel\n",
2506                                 conf->channel->hw_value, conf->channel->band);
2507                         ret = -EINVAL;
2508                         goto set_ch_out;
2509                 }
2510
2511                 priv->current_ht_config.is_ht = conf_is_ht(conf);
2512
2513                 spin_lock_irqsave(&priv->lock, flags);
2514
2515
2516                 /* if we are switching from ht to 2.4 clear flags
2517                  * from any ht related info since 2.4 does not
2518                  * support ht */
2519                 if ((le16_to_cpu(priv->staging_rxon.channel) != ch))
2520                         priv->staging_rxon.flags = 0;
2521
2522                 iwl_set_rxon_channel(priv, conf->channel);
2523
2524                 iwl_set_flags_for_band(priv, conf->channel->band);
2525                 spin_unlock_irqrestore(&priv->lock, flags);
2526  set_ch_out:
2527                 /* The list of supported rates and rate mask can be different
2528                  * for each band; since the band may have changed, reset
2529                  * the rate mask to what mac80211 lists */
2530                 iwl_set_rate(priv);
2531         }
2532
2533         if (changed & IEEE80211_CONF_CHANGE_PS) {
2534                 if (conf->flags & IEEE80211_CONF_PS)
2535                         ret = iwl_power_set_user_mode(priv, IWL_POWER_INDEX_3);
2536                 else
2537                         ret = iwl_power_set_user_mode(priv, IWL_POWER_MODE_CAM);
2538                 if (ret)
2539                         IWL_DEBUG_MAC80211(priv, "Error setting power level\n");
2540
2541         }
2542
2543         if (changed & IEEE80211_CONF_CHANGE_POWER) {
2544                 IWL_DEBUG_MAC80211(priv, "TX Power old=%d new=%d\n",
2545                         priv->tx_power_user_lmt, conf->power_level);
2546
2547                 iwl_set_tx_power(priv, conf->power_level, false);
2548         }
2549
2550         /* call to ensure that 4965 rx_chain is set properly in monitor mode */
2551         if (priv->cfg->ops->hcmd->set_rxon_chain)
2552                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
2553
2554         if (changed & IEEE80211_CONF_CHANGE_RADIO_ENABLED) {
2555                 if (conf->radio_enabled &&
2556                         iwl_radio_kill_sw_enable_radio(priv)) {
2557                         IWL_DEBUG_MAC80211(priv, "leave - RF-KILL - "
2558                                                 "waiting for uCode\n");
2559                         goto out;
2560                 }
2561
2562                 if (!conf->radio_enabled)
2563                         iwl_radio_kill_sw_disable_radio(priv);
2564         }
2565
2566         if (!conf->radio_enabled) {
2567                 IWL_DEBUG_MAC80211(priv, "leave - radio disabled\n");
2568                 goto out;
2569         }
2570
2571         if (!iwl_is_ready(priv)) {
2572                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2573                 goto out;
2574         }
2575
2576         if (scan_active)
2577                 goto out;
2578
2579         if (memcmp(&priv->active_rxon,
2580                    &priv->staging_rxon, sizeof(priv->staging_rxon)))
2581                 iwlcore_commit_rxon(priv);
2582         else
2583                 IWL_DEBUG_INFO(priv, "Not re-sending same RXON configuration.\n");
2584
2585
2586 out:
2587         IWL_DEBUG_MAC80211(priv, "leave\n");
2588         mutex_unlock(&priv->mutex);
2589         return ret;
2590 }
2591 EXPORT_SYMBOL(iwl_mac_config);
2592
2593 int iwl_mac_config_interface(struct ieee80211_hw *hw,
2594                                         struct ieee80211_vif *vif,
2595                                     struct ieee80211_if_conf *conf)
2596 {
2597         struct iwl_priv *priv = hw->priv;
2598         int rc;
2599
2600         if (conf == NULL)
2601                 return -EIO;
2602
2603         if (priv->vif != vif) {
2604                 IWL_DEBUG_MAC80211(priv, "leave - priv->vif != vif\n");
2605                 return 0;
2606         }
2607
2608         if (priv->iw_mode == NL80211_IFTYPE_ADHOC &&
2609             conf->changed & IEEE80211_IFCC_BEACON) {
2610                 struct sk_buff *beacon = ieee80211_beacon_get(hw, vif);
2611                 if (!beacon)
2612                         return -ENOMEM;
2613                 mutex_lock(&priv->mutex);
2614                 rc = iwl_mac_beacon_update(hw, beacon);
2615                 mutex_unlock(&priv->mutex);
2616                 if (rc)
2617                         return rc;
2618         }
2619
2620         if (!iwl_is_alive(priv))
2621                 return -EAGAIN;
2622
2623         mutex_lock(&priv->mutex);
2624
2625         if (conf->bssid)
2626                 IWL_DEBUG_MAC80211(priv, "bssid: %pM\n", conf->bssid);
2627
2628 /*
2629  * very dubious code was here; the probe filtering flag is never set:
2630  *
2631         if (unlikely(test_bit(STATUS_SCANNING, &priv->status)) &&
2632             !(priv->hw->flags & IEEE80211_HW_NO_PROBE_FILTERING)) {
2633  */
2634
2635         if (priv->iw_mode == NL80211_IFTYPE_AP) {
2636                 if (!conf->bssid) {
2637                         conf->bssid = priv->mac_addr;
2638                         memcpy(priv->bssid, priv->mac_addr, ETH_ALEN);
2639                         IWL_DEBUG_MAC80211(priv, "bssid was set to: %pM\n",
2640                                            conf->bssid);
2641                 }
2642                 if (priv->ibss_beacon)
2643                         dev_kfree_skb(priv->ibss_beacon);
2644
2645                 priv->ibss_beacon = ieee80211_beacon_get(hw, vif);
2646         }
2647
2648         if (iwl_is_rfkill(priv))
2649                 goto done;
2650
2651         if (conf->bssid && !is_zero_ether_addr(conf->bssid) &&
2652             !is_multicast_ether_addr(conf->bssid)) {
2653                 /* If there is currently a HW scan going on in the background
2654                  * then we need to cancel it else the RXON below will fail. */
2655                 if (iwl_scan_cancel_timeout(priv, 100)) {
2656                         IWL_WARN(priv, "Aborted scan still in progress "
2657                                     "after 100ms\n");
2658                         IWL_DEBUG_MAC80211(priv, "leaving - scan abort failed.\n");
2659                         mutex_unlock(&priv->mutex);
2660                         return -EAGAIN;
2661                 }
2662                 memcpy(priv->staging_rxon.bssid_addr, conf->bssid, ETH_ALEN);
2663
2664                 /* TODO: Audit driver for usage of these members and see
2665                  * if mac80211 deprecates them (priv->bssid looks like it
2666                  * shouldn't be there, but I haven't scanned the IBSS code
2667                  * to verify) - jpk */
2668                 memcpy(priv->bssid, conf->bssid, ETH_ALEN);
2669
2670                 if (priv->iw_mode == NL80211_IFTYPE_AP)
2671                         iwlcore_config_ap(priv);
2672                 else {
2673                         rc = iwlcore_commit_rxon(priv);
2674                         if ((priv->iw_mode == NL80211_IFTYPE_STATION) && rc)
2675                                 iwl_rxon_add_station(
2676                                         priv, priv->active_rxon.bssid_addr, 1);
2677                 }
2678
2679         } else {
2680                 iwl_scan_cancel_timeout(priv, 100);
2681                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2682                 iwlcore_commit_rxon(priv);
2683         }
2684
2685  done:
2686         IWL_DEBUG_MAC80211(priv, "leave\n");
2687         mutex_unlock(&priv->mutex);
2688
2689         return 0;
2690 }
2691 EXPORT_SYMBOL(iwl_mac_config_interface);
2692
2693 int iwl_mac_get_tx_stats(struct ieee80211_hw *hw,
2694                          struct ieee80211_tx_queue_stats *stats)
2695 {
2696         struct iwl_priv *priv = hw->priv;
2697         int i, avail;
2698         struct iwl_tx_queue *txq;
2699         struct iwl_queue *q;
2700         unsigned long flags;
2701
2702         IWL_DEBUG_MAC80211(priv, "enter\n");
2703
2704         if (!iwl_is_ready_rf(priv)) {
2705                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
2706                 return -EIO;
2707         }
2708
2709         spin_lock_irqsave(&priv->lock, flags);
2710
2711         for (i = 0; i < AC_NUM; i++) {
2712                 txq = &priv->txq[i];
2713                 q = &txq->q;
2714                 avail = iwl_queue_space(q);
2715
2716                 stats[i].len = q->n_window - avail;
2717                 stats[i].limit = q->n_window - q->high_mark;
2718                 stats[i].count = q->n_window;
2719
2720         }
2721         spin_unlock_irqrestore(&priv->lock, flags);
2722
2723         IWL_DEBUG_MAC80211(priv, "leave\n");
2724
2725         return 0;
2726 }
2727 EXPORT_SYMBOL(iwl_mac_get_tx_stats);
2728
2729 void iwl_mac_reset_tsf(struct ieee80211_hw *hw)
2730 {
2731         struct iwl_priv *priv = hw->priv;
2732         unsigned long flags;
2733
2734         mutex_lock(&priv->mutex);
2735         IWL_DEBUG_MAC80211(priv, "enter\n");
2736
2737         spin_lock_irqsave(&priv->lock, flags);
2738         memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_info));
2739         spin_unlock_irqrestore(&priv->lock, flags);
2740
2741         iwl_reset_qos(priv);
2742
2743         spin_lock_irqsave(&priv->lock, flags);
2744         priv->assoc_id = 0;
2745         priv->assoc_capability = 0;
2746         priv->assoc_station_added = 0;
2747
2748         /* new association get rid of ibss beacon skb */
2749         if (priv->ibss_beacon)
2750                 dev_kfree_skb(priv->ibss_beacon);
2751
2752         priv->ibss_beacon = NULL;
2753
2754         priv->beacon_int = priv->hw->conf.beacon_int;
2755         priv->timestamp = 0;
2756         if ((priv->iw_mode == NL80211_IFTYPE_STATION))
2757                 priv->beacon_int = 0;
2758
2759         spin_unlock_irqrestore(&priv->lock, flags);
2760
2761         if (!iwl_is_ready_rf(priv)) {
2762                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2763                 mutex_unlock(&priv->mutex);
2764                 return;
2765         }
2766
2767         /* we are restarting association process
2768          * clear RXON_FILTER_ASSOC_MSK bit
2769          */
2770         if (priv->iw_mode != NL80211_IFTYPE_AP) {
2771                 iwl_scan_cancel_timeout(priv, 100);
2772                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2773                 iwlcore_commit_rxon(priv);
2774         }
2775
2776         iwl_power_update_mode(priv, 0);
2777
2778         /* Per mac80211.h: This is only used in IBSS mode... */
2779         if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
2780
2781                 /* switch to CAM during association period.
2782                  * the ucode will block any association/authentication
2783                  * frome during assiciation period if it can not hear
2784                  * the AP because of PM. the timer enable PM back is
2785                  * association do not complete
2786                  */
2787                 if (priv->hw->conf.channel->flags &
2788                     (IEEE80211_CHAN_PASSIVE_SCAN | IEEE80211_CHAN_RADAR))
2789                                 iwl_power_disable_management(priv, 3000);
2790
2791                 IWL_DEBUG_MAC80211(priv, "leave - not in IBSS\n");
2792                 mutex_unlock(&priv->mutex);
2793                 return;
2794         }
2795
2796         iwl_set_rate(priv);
2797
2798         mutex_unlock(&priv->mutex);
2799
2800         IWL_DEBUG_MAC80211(priv, "leave\n");
2801 }
2802 EXPORT_SYMBOL(iwl_mac_reset_tsf);
2803
2804 #ifdef CONFIG_PM
2805
2806 int iwl_pci_suspend(struct pci_dev *pdev, pm_message_t state)
2807 {
2808         struct iwl_priv *priv = pci_get_drvdata(pdev);
2809
2810         /*
2811          * This function is called when system goes into suspend state
2812          * mac80211 will call iwl_mac_stop() from the mac80211 suspend function
2813          * first but since iwl_mac_stop() has no knowledge of who the caller is,
2814          * it will not call apm_ops.stop() to stop the DMA operation.
2815          * Calling apm_ops.stop here to make sure we stop the DMA.
2816          */
2817         priv->cfg->ops->lib->apm_ops.stop(priv);
2818
2819         pci_save_state(pdev);
2820         pci_disable_device(pdev);
2821         pci_set_power_state(pdev, PCI_D3hot);
2822
2823         return 0;
2824 }
2825 EXPORT_SYMBOL(iwl_pci_suspend);
2826
2827 int iwl_pci_resume(struct pci_dev *pdev)
2828 {
2829         struct iwl_priv *priv = pci_get_drvdata(pdev);
2830         int ret;
2831
2832         pci_set_power_state(pdev, PCI_D0);
2833         ret = pci_enable_device(pdev);
2834         if (ret)
2835                 return ret;
2836         pci_restore_state(pdev);
2837         iwl_enable_interrupts(priv);
2838
2839         return 0;
2840 }
2841 EXPORT_SYMBOL(iwl_pci_resume);
2842
2843 #endif /* CONFIG_PM */