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-power.h"
  40 #include "iwl-sta.h"
  41 #include "iwl-helpers.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 u32 iwl_debug_level;
  63 EXPORT_SYMBOL(iwl_debug_level);
  64
  65 static irqreturn_t iwl_isr(int irq, void *data);
  66
  67 /*
  68  * Parameter order:
  69  *   rate, ht rate, prev rate, next rate, prev tgg rate, next tgg rate
  70  *
  71  * If there isn't a valid next or previous rate then INV is used which
  72  * maps to IWL_RATE_INVALID
  73  *
  74  */
  75 const struct iwl_rate_info iwl_rates[IWL_RATE_COUNT] = {
  76         IWL_DECLARE_RATE_INFO(1, INV, INV, 2, INV, 2, INV, 2),    /*  1mbps */
  77         IWL_DECLARE_RATE_INFO(2, INV, 1, 5, 1, 5, 1, 5),          /*  2mbps */
  78         IWL_DECLARE_RATE_INFO(5, INV, 2, 6, 2, 11, 2, 11),        /*5.5mbps */
  79         IWL_DECLARE_RATE_INFO(11, INV, 9, 12, 9, 12, 5, 18),      /* 11mbps */
  80         IWL_DECLARE_RATE_INFO(6, 6, 5, 9, 5, 11, 5, 11),        /*  6mbps */
  81         IWL_DECLARE_RATE_INFO(9, 6, 6, 11, 6, 11, 5, 11),       /*  9mbps */
  82         IWL_DECLARE_RATE_INFO(12, 12, 11, 18, 11, 18, 11, 18),   /* 12mbps */
  83         IWL_DECLARE_RATE_INFO(18, 18, 12, 24, 12, 24, 11, 24),   /* 18mbps */
  84         IWL_DECLARE_RATE_INFO(24, 24, 18, 36, 18, 36, 18, 36),   /* 24mbps */
  85         IWL_DECLARE_RATE_INFO(36, 36, 24, 48, 24, 48, 24, 48),   /* 36mbps */
  86         IWL_DECLARE_RATE_INFO(48, 48, 36, 54, 36, 54, 36, 54),   /* 48mbps */
  87         IWL_DECLARE_RATE_INFO(54, 54, 48, INV, 48, INV, 48, INV),/* 54mbps */
  88         IWL_DECLARE_RATE_INFO(60, 60, 48, INV, 48, INV, 48, INV),/* 60mbps */
  89         /* FIXME:RS:          ^^    should be INV (legacy) */
  90 };
  91 EXPORT_SYMBOL(iwl_rates);
  92
  93 /**
  94  * translate ucode response to mac80211 tx status control values
  95  */
  96 void iwl_hwrate_to_tx_control(struct iwl_priv *priv, u32 rate_n_flags,
  97                                   struct ieee80211_tx_info *info)
  98 {
  99         struct ieee80211_tx_rate *r = &info->control.rates[0];
 100
 101         info->antenna_sel_tx =
 102                 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
 103         if (rate_n_flags & RATE_MCS_HT_MSK)
 104                 r->flags |= IEEE80211_TX_RC_MCS;
 105         if (rate_n_flags & RATE_MCS_GF_MSK)
 106                 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
 107         if (rate_n_flags & RATE_MCS_HT40_MSK)
 108                 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
 109         if (rate_n_flags & RATE_MCS_DUP_MSK)
 110                 r->flags |= IEEE80211_TX_RC_DUP_DATA;
 111         if (rate_n_flags & RATE_MCS_SGI_MSK)
 112                 r->flags |= IEEE80211_TX_RC_SHORT_GI;
 113         r->idx = iwl_hwrate_to_mac80211_idx(rate_n_flags, info->band);
 114 }
 115 EXPORT_SYMBOL(iwl_hwrate_to_tx_control);
 116
 117 int iwl_hwrate_to_plcp_idx(u32 rate_n_flags)
 118 {
 119         int idx = 0;
 120
 121         /* HT rate format */
 122         if (rate_n_flags & RATE_MCS_HT_MSK) {
 123                 idx = (rate_n_flags & 0xff);
 124
 125                 if (idx >= IWL_RATE_MIMO3_6M_PLCP)
 126                         idx = idx - IWL_RATE_MIMO3_6M_PLCP;
 127                 else if (idx >= IWL_RATE_MIMO2_6M_PLCP)
 128                         idx = idx - IWL_RATE_MIMO2_6M_PLCP;
 129
 130                 idx += IWL_FIRST_OFDM_RATE;
 131                 /* skip 9M not supported in ht*/
 132                 if (idx >= IWL_RATE_9M_INDEX)
 133                         idx += 1;
 134                 if ((idx >= IWL_FIRST_OFDM_RATE) && (idx <= IWL_LAST_OFDM_RATE))
 135                         return idx;
 136
 137         /* legacy rate format, search for match in table */
 138         } else {
 139                 for (idx = 0; idx < ARRAY_SIZE(iwl_rates); idx++)
 140                         if (iwl_rates[idx].plcp == (rate_n_flags & 0xFF))
 141                                 return idx;
 142         }
 143
 144         return -1;
 145 }
 146 EXPORT_SYMBOL(iwl_hwrate_to_plcp_idx);
 147
 148 int iwl_hwrate_to_mac80211_idx(u32 rate_n_flags, enum ieee80211_band band)
 149 {
 150         int idx = 0;
 151         int band_offset = 0;
 152
 153         /* HT rate format: mac80211 wants an MCS number, which is just LSB */
 154         if (rate_n_flags & RATE_MCS_HT_MSK) {
 155                 idx = (rate_n_flags & 0xff);
 156                 return idx;
 157         /* Legacy rate format, search for match in table */
 158         } else {
 159                 if (band == IEEE80211_BAND_5GHZ)
 160                         band_offset = IWL_FIRST_OFDM_RATE;
 161                 for (idx = band_offset; idx < IWL_RATE_COUNT_LEGACY; idx++)
 162                         if (iwl_rates[idx].plcp == (rate_n_flags & 0xFF))
 163                                 return idx - band_offset;
 164         }
 165
 166         return -1;
 167 }
 168
 169 u8 iwl_toggle_tx_ant(struct iwl_priv *priv, u8 ant)
 170 {
 171         int i;
 172         u8 ind = ant;
 173         for (i = 0; i < RATE_ANT_NUM - 1; i++) {
 174                 ind = (ind + 1) < RATE_ANT_NUM ?  ind + 1 : 0;
 175                 if (priv->hw_params.valid_tx_ant & BIT(ind))
 176                         return ind;
 177         }
 178         return ant;
 179 }
 180
 181 const u8 iwl_bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
 182 EXPORT_SYMBOL(iwl_bcast_addr);
 183
 184
 185 /* This function both allocates and initializes hw and priv. */
 186 struct ieee80211_hw *iwl_alloc_all(struct iwl_cfg *cfg,
 187                 struct ieee80211_ops *hw_ops)
 188 {
 189         struct iwl_priv *priv;
 190
 191         /* mac80211 allocates memory for this device instance, including
 192          *   space for this driver's private structure */
 193         struct ieee80211_hw *hw =
 194                 ieee80211_alloc_hw(sizeof(struct iwl_priv), hw_ops);
 195         if (hw == NULL) {
 196                 printk(KERN_ERR "%s: Can not allocate network device\n",
 197                        cfg->name);
 198                 goto out;
 199         }
 200
 201         priv = hw->priv;
 202         priv->hw = hw;
 203
 204 out:
 205         return hw;
 206 }
 207 EXPORT_SYMBOL(iwl_alloc_all);
 208
 209 void iwl_hw_detect(struct iwl_priv *priv)
 210 {
 211         priv->hw_rev = _iwl_read32(priv, CSR_HW_REV);
 212         priv->hw_wa_rev = _iwl_read32(priv, CSR_HW_REV_WA_REG);
 213         pci_read_config_byte(priv->pci_dev, PCI_REVISION_ID, &priv->rev_id);
 214 }
 215 EXPORT_SYMBOL(iwl_hw_detect);
 216
 217 int iwl_hw_nic_init(struct iwl_priv *priv)
 218 {
 219         unsigned long flags;
 220         struct iwl_rx_queue *rxq = &priv->rxq;
 221         int ret;
 222
 223         /* nic_init */
 224         spin_lock_irqsave(&priv->lock, flags);
 225         priv->cfg->ops->lib->apm_ops.init(priv);
 226         iwl_write32(priv, CSR_INT_COALESCING, 512 / 32);
 227         spin_unlock_irqrestore(&priv->lock, flags);
 228
 229         ret = priv->cfg->ops->lib->apm_ops.set_pwr_src(priv, IWL_PWR_SRC_VMAIN);
 230
 231         priv->cfg->ops->lib->apm_ops.config(priv);
 232
 233         /* Allocate the RX queue, or reset if it is already allocated */
 234         if (!rxq->bd) {
 235                 ret = iwl_rx_queue_alloc(priv);
 236                 if (ret) {
 237                         IWL_ERR(priv, "Unable to initialize Rx queue\n");
 238                         return -ENOMEM;
 239                 }
 240         } else
 241                 iwl_rx_queue_reset(priv, rxq);
 242
 243         iwl_rx_replenish(priv);
 244
 245         iwl_rx_init(priv, rxq);
 246
 247         spin_lock_irqsave(&priv->lock, flags);
 248
 249         rxq->need_update = 1;
 250         iwl_rx_queue_update_write_ptr(priv, rxq);
 251
 252         spin_unlock_irqrestore(&priv->lock, flags);
 253
 254         /* Allocate and init all Tx and Command queues */
 255         ret = iwl_txq_ctx_reset(priv);
 256         if (ret)
 257                 return ret;
 258
 259         set_bit(STATUS_INIT, &priv->status);
 260
 261         return 0;
 262 }
 263 EXPORT_SYMBOL(iwl_hw_nic_init);
 264
 265 /*
 266  * QoS  support
 267 */
 268 void iwl_activate_qos(struct iwl_priv *priv, u8 force)
 269 {
 270         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 271                 return;
 272
 273         priv->qos_data.def_qos_parm.qos_flags = 0;
 274
 275         if (priv->qos_data.qos_cap.q_AP.queue_request &&
 276             !priv->qos_data.qos_cap.q_AP.txop_request)
 277                 priv->qos_data.def_qos_parm.qos_flags |=
 278                         QOS_PARAM_FLG_TXOP_TYPE_MSK;
 279         if (priv->qos_data.qos_active)
 280                 priv->qos_data.def_qos_parm.qos_flags |=
 281                         QOS_PARAM_FLG_UPDATE_EDCA_MSK;
 282
 283         if (priv->current_ht_config.is_ht)
 284                 priv->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
 285
 286         if (force || iwl_is_associated(priv)) {
 287                 IWL_DEBUG_QOS(priv, "send QoS cmd with Qos active=%d FLAGS=0x%X\n",
 288                                 priv->qos_data.qos_active,
 289                                 priv->qos_data.def_qos_parm.qos_flags);
 290
 291                 iwl_send_cmd_pdu_async(priv, REPLY_QOS_PARAM,
 292                                        sizeof(struct iwl_qosparam_cmd),
 293                                        &priv->qos_data.def_qos_parm, NULL);
 294         }
 295 }
 296 EXPORT_SYMBOL(iwl_activate_qos);
 297
 298 /*
 299  * AC        CWmin         CW max      AIFSN      TXOP Limit    TXOP Limit
 300  *                                              (802.11b)      (802.11a/g)
 301  * AC_BK      15            1023        7           0               0
 302  * AC_BE      15            1023        3           0               0
 303  * AC_VI       7              15        2          6.016ms       3.008ms
 304  * AC_VO       3               7        2          3.264ms       1.504ms
 305  */
 306 void iwl_reset_qos(struct iwl_priv *priv)
 307 {
 308         u16 cw_min = 15;
 309         u16 cw_max = 1023;
 310         u8 aifs = 2;
 311         bool is_legacy = false;
 312         unsigned long flags;
 313         int i;
 314
 315         spin_lock_irqsave(&priv->lock, flags);
 316         /* QoS always active in AP and ADHOC mode
 317          * In STA mode wait for association
 318          */
 319         if (priv->iw_mode == NL80211_IFTYPE_ADHOC ||
 320             priv->iw_mode == NL80211_IFTYPE_AP)
 321                 priv->qos_data.qos_active = 1;
 322         else
 323                 priv->qos_data.qos_active = 0;
 324
 325         /* check for legacy mode */
 326         if ((priv->iw_mode == NL80211_IFTYPE_ADHOC &&
 327             (priv->active_rate & IWL_OFDM_RATES_MASK) == 0) ||
 328             (priv->iw_mode == NL80211_IFTYPE_STATION &&
 329             (priv->staging_rxon.flags & RXON_FLG_SHORT_SLOT_MSK) == 0)) {
 330                 cw_min = 31;
 331                 is_legacy = 1;
 332         }
 333
 334         if (priv->qos_data.qos_active)
 335                 aifs = 3;
 336
 337         /* AC_BE */
 338         priv->qos_data.def_qos_parm.ac[0].cw_min = cpu_to_le16(cw_min);
 339         priv->qos_data.def_qos_parm.ac[0].cw_max = cpu_to_le16(cw_max);
 340         priv->qos_data.def_qos_parm.ac[0].aifsn = aifs;
 341         priv->qos_data.def_qos_parm.ac[0].edca_txop = 0;
 342         priv->qos_data.def_qos_parm.ac[0].reserved1 = 0;
 343
 344         if (priv->qos_data.qos_active) {
 345                 /* AC_BK */
 346                 i = 1;
 347                 priv->qos_data.def_qos_parm.ac[i].cw_min = cpu_to_le16(cw_min);
 348                 priv->qos_data.def_qos_parm.ac[i].cw_max = cpu_to_le16(cw_max);
 349                 priv->qos_data.def_qos_parm.ac[i].aifsn = 7;
 350                 priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
 351                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
 352
 353                 /* AC_VI */
 354                 i = 2;
 355                 priv->qos_data.def_qos_parm.ac[i].cw_min =
 356                         cpu_to_le16((cw_min + 1) / 2 - 1);
 357                 priv->qos_data.def_qos_parm.ac[i].cw_max =
 358                         cpu_to_le16(cw_min);
 359                 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
 360                 if (is_legacy)
 361                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
 362                                 cpu_to_le16(6016);
 363                 else
 364                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
 365                                 cpu_to_le16(3008);
 366                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
 367
 368                 /* AC_VO */
 369                 i = 3;
 370                 priv->qos_data.def_qos_parm.ac[i].cw_min =
 371                         cpu_to_le16((cw_min + 1) / 4 - 1);
 372                 priv->qos_data.def_qos_parm.ac[i].cw_max =
 373                         cpu_to_le16((cw_min + 1) / 2 - 1);
 374                 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
 375                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
 376                 if (is_legacy)
 377                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
 378                                 cpu_to_le16(3264);
 379                 else
 380                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
 381                                 cpu_to_le16(1504);
 382         } else {
 383                 for (i = 1; i < 4; i++) {
 384                         priv->qos_data.def_qos_parm.ac[i].cw_min =
 385                                 cpu_to_le16(cw_min);
 386                         priv->qos_data.def_qos_parm.ac[i].cw_max =
 387                                 cpu_to_le16(cw_max);
 388                         priv->qos_data.def_qos_parm.ac[i].aifsn = aifs;
 389                         priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
 390                         priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
 391                 }
 392         }
 393         IWL_DEBUG_QOS(priv, "set QoS to default \n");
 394
 395         spin_unlock_irqrestore(&priv->lock, flags);
 396 }
 397 EXPORT_SYMBOL(iwl_reset_qos);
 398
 399 #define MAX_BIT_RATE_40_MHZ 150 /* Mbps */
 400 #define MAX_BIT_RATE_20_MHZ 72 /* Mbps */
 401 static void iwlcore_init_ht_hw_capab(const struct iwl_priv *priv,
 402                               struct ieee80211_sta_ht_cap *ht_info,
 403                               enum ieee80211_band band)
 404 {
 405         u16 max_bit_rate = 0;
 406         u8 rx_chains_num = priv->hw_params.rx_chains_num;
 407         u8 tx_chains_num = priv->hw_params.tx_chains_num;
 408
 409         ht_info->cap = 0;
 410         memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));
 411
 412         ht_info->ht_supported = true;
 413
 414         if (priv->cfg->ht_greenfield_support)
 415                 ht_info->cap |= IEEE80211_HT_CAP_GRN_FLD;
 416         ht_info->cap |= IEEE80211_HT_CAP_SGI_20;
 417         ht_info->cap |= (IEEE80211_HT_CAP_SM_PS &
 418                              (WLAN_HT_CAP_SM_PS_DISABLED << 2));
 419
 420         max_bit_rate = MAX_BIT_RATE_20_MHZ;
 421         if (priv->hw_params.ht40_channel & BIT(band)) {
 422                 ht_info->cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 423                 ht_info->cap |= IEEE80211_HT_CAP_SGI_40;
 424                 ht_info->mcs.rx_mask[4] = 0x01;
 425                 max_bit_rate = MAX_BIT_RATE_40_MHZ;
 426         }
 427
 428         if (priv->cfg->mod_params->amsdu_size_8K)
 429                 ht_info->cap |= IEEE80211_HT_CAP_MAX_AMSDU;
 430
 431         ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
 432         ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;
 433
 434         ht_info->mcs.rx_mask[0] = 0xFF;
 435         if (rx_chains_num >= 2)
 436                 ht_info->mcs.rx_mask[1] = 0xFF;
 437         if (rx_chains_num >= 3)
 438                 ht_info->mcs.rx_mask[2] = 0xFF;
 439
 440         /* Highest supported Rx data rate */
 441         max_bit_rate *= rx_chains_num;
 442         WARN_ON(max_bit_rate & ~IEEE80211_HT_MCS_RX_HIGHEST_MASK);
 443         ht_info->mcs.rx_highest = cpu_to_le16(max_bit_rate);
 444
 445         /* Tx MCS capabilities */
 446         ht_info->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
 447         if (tx_chains_num != rx_chains_num) {
 448                 ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
 449                 ht_info->mcs.tx_params |= ((tx_chains_num - 1) <<
 450                                 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT);
 451         }
 452 }
 453
 454 static void iwlcore_init_hw_rates(struct iwl_priv *priv,
 455                               struct ieee80211_rate *rates)
 456 {
 457         int i;
 458
 459         for (i = 0; i < IWL_RATE_COUNT_LEGACY; i++) {
 460                 rates[i].bitrate = iwl_rates[i].ieee * 5;
 461                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
 462                 rates[i].hw_value_short = i;
 463                 rates[i].flags = 0;
 464                 if ((i >= IWL_FIRST_CCK_RATE) && (i <= IWL_LAST_CCK_RATE)) {
 465                         /*
 466                          * If CCK != 1M then set short preamble rate flag.
 467                          */
 468                         rates[i].flags |=
 469                                 (iwl_rates[i].plcp == IWL_RATE_1M_PLCP) ?
 470                                         0 : IEEE80211_RATE_SHORT_PREAMBLE;
 471                 }
 472         }
 473 }
 474
 475
 476 /**
 477  * iwlcore_init_geos - Initialize mac80211's geo/channel info based from eeprom
 478  */
 479 int iwlcore_init_geos(struct iwl_priv *priv)
 480 {
 481         struct iwl_channel_info *ch;
 482         struct ieee80211_supported_band *sband;
 483         struct ieee80211_channel *channels;
 484         struct ieee80211_channel *geo_ch;
 485         struct ieee80211_rate *rates;
 486         int i = 0;
 487
 488         if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
 489             priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
 490                 IWL_DEBUG_INFO(priv, "Geography modes already initialized.\n");
 491                 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
 492                 return 0;
 493         }
 494
 495         channels = kzalloc(sizeof(struct ieee80211_channel) *
 496                            priv->channel_count, GFP_KERNEL);
 497         if (!channels)
 498                 return -ENOMEM;
 499
 500         rates = kzalloc((sizeof(struct ieee80211_rate) * IWL_RATE_COUNT_LEGACY),
 501                         GFP_KERNEL);
 502         if (!rates) {
 503                 kfree(channels);
 504                 return -ENOMEM;
 505         }
 506
 507         /* 5.2GHz channels start after the 2.4GHz channels */
 508         sband = &priv->bands[IEEE80211_BAND_5GHZ];
 509         sband->channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)];
 510         /* just OFDM */
 511         sband->bitrates = &rates[IWL_FIRST_OFDM_RATE];
 512         sband->n_bitrates = IWL_RATE_COUNT_LEGACY - IWL_FIRST_OFDM_RATE;
 513
 514         if (priv->cfg->sku & IWL_SKU_N)
 515                 iwlcore_init_ht_hw_capab(priv, &sband->ht_cap,
 516                                          IEEE80211_BAND_5GHZ);
 517
 518         sband = &priv->bands[IEEE80211_BAND_2GHZ];
 519         sband->channels = channels;
 520         /* OFDM & CCK */
 521         sband->bitrates = rates;
 522         sband->n_bitrates = IWL_RATE_COUNT_LEGACY;
 523
 524         if (priv->cfg->sku & IWL_SKU_N)
 525                 iwlcore_init_ht_hw_capab(priv, &sband->ht_cap,
 526                                          IEEE80211_BAND_2GHZ);
 527
 528         priv->ieee_channels = channels;
 529         priv->ieee_rates = rates;
 530
 531         for (i = 0;  i < priv->channel_count; i++) {
 532                 ch = &priv->channel_info[i];
 533
 534                 /* FIXME: might be removed if scan is OK */
 535                 if (!is_channel_valid(ch))
 536                         continue;
 537
 538                 if (is_channel_a_band(ch))
 539                         sband =  &priv->bands[IEEE80211_BAND_5GHZ];
 540                 else
 541                         sband =  &priv->bands[IEEE80211_BAND_2GHZ];
 542
 543                 geo_ch = &sband->channels[sband->n_channels++];
 544
 545                 geo_ch->center_freq =
 546                                 ieee80211_channel_to_frequency(ch->channel);
 547                 geo_ch->max_power = ch->max_power_avg;
 548                 geo_ch->max_antenna_gain = 0xff;
 549                 geo_ch->hw_value = ch->channel;
 550
 551                 if (is_channel_valid(ch)) {
 552                         if (!(ch->flags & EEPROM_CHANNEL_IBSS))
 553                                 geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
 554
 555                         if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
 556                                 geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
 557
 558                         if (ch->flags & EEPROM_CHANNEL_RADAR)
 559                                 geo_ch->flags |= IEEE80211_CHAN_RADAR;
 560
 561                         geo_ch->flags |= ch->ht40_extension_channel;
 562
 563                         if (ch->max_power_avg > priv->tx_power_device_lmt)
 564                                 priv->tx_power_device_lmt = ch->max_power_avg;
 565                 } else {
 566                         geo_ch->flags |= IEEE80211_CHAN_DISABLED;
 567                 }
 568
 569                 IWL_DEBUG_INFO(priv, "Channel %d Freq=%d[%sGHz] %s flag=0x%X\n",
 570                                 ch->channel, geo_ch->center_freq,
 571                                 is_channel_a_band(ch) ?  "5.2" : "2.4",
 572                                 geo_ch->flags & IEEE80211_CHAN_DISABLED ?
 573                                 "restricted" : "valid",
 574                                  geo_ch->flags);
 575         }
 576
 577         if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) &&
 578              priv->cfg->sku & IWL_SKU_A) {
 579                 IWL_INFO(priv, "Incorrectly detected BG card as ABG. "
 580                         "Please send your PCI ID 0x%04X:0x%04X to maintainer.\n",
 581                            priv->pci_dev->device,
 582                            priv->pci_dev->subsystem_device);
 583                 priv->cfg->sku &= ~IWL_SKU_A;
 584         }
 585
 586         IWL_INFO(priv, "Tunable channels: %d 802.11bg, %d 802.11a channels\n",
 587                    priv->bands[IEEE80211_BAND_2GHZ].n_channels,
 588                    priv->bands[IEEE80211_BAND_5GHZ].n_channels);
 589
 590         set_bit(STATUS_GEO_CONFIGURED, &priv->status);
 591
 592         return 0;
 593 }
 594 EXPORT_SYMBOL(iwlcore_init_geos);
 595
 596 /*
 597  * iwlcore_free_geos - undo allocations in iwlcore_init_geos
 598  */
 599 void iwlcore_free_geos(struct iwl_priv *priv)
 600 {
 601         kfree(priv->ieee_channels);
 602         kfree(priv->ieee_rates);
 603         clear_bit(STATUS_GEO_CONFIGURED, &priv->status);
 604 }
 605 EXPORT_SYMBOL(iwlcore_free_geos);
 606
 607 static bool is_single_rx_stream(struct iwl_priv *priv)
 608 {
 609         return !priv->current_ht_config.is_ht ||
 610                ((priv->current_ht_config.mcs.rx_mask[1] == 0) &&
 611                 (priv->current_ht_config.mcs.rx_mask[2] == 0));
 612 }
 613
 614 static u8 iwl_is_channel_extension(struct iwl_priv *priv,
 615                                    enum ieee80211_band band,
 616                                    u16 channel, u8 extension_chan_offset)
 617 {
 618         const struct iwl_channel_info *ch_info;
 619
 620         ch_info = iwl_get_channel_info(priv, band, channel);
 621         if (!is_channel_valid(ch_info))
 622                 return 0;
 623
 624         if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE)
 625                 return !(ch_info->ht40_extension_channel &
 626                                         IEEE80211_CHAN_NO_HT40PLUS);
 627         else if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW)
 628                 return !(ch_info->ht40_extension_channel &
 629                                         IEEE80211_CHAN_NO_HT40MINUS);
 630
 631         return 0;
 632 }
 633
 634 u8 iwl_is_ht40_tx_allowed(struct iwl_priv *priv,
 635                          struct ieee80211_sta_ht_cap *sta_ht_inf)
 636 {
 637         struct iwl_ht_info *iwl_ht_conf = &priv->current_ht_config;
 638
 639         if ((!iwl_ht_conf->is_ht) ||
 640             (iwl_ht_conf->supported_chan_width != IWL_CHANNEL_WIDTH_40MHZ))
 641                 return 0;
 642
 643         /* We do not check for IEEE80211_HT_CAP_SUP_WIDTH_20_40
 644          * the bit will not set if it is pure 40MHz case
 645          */
 646         if (sta_ht_inf) {
 647                 if (!sta_ht_inf->ht_supported)
 648                         return 0;
 649         }
 650 #ifdef CONFIG_IWLWIFI_DEBUG
 651         if (priv->disable_ht40)
 652                 return 0;
 653 #endif
 654         return iwl_is_channel_extension(priv, priv->band,
 655                         le16_to_cpu(priv->staging_rxon.channel),
 656                         iwl_ht_conf->extension_chan_offset);
 657 }
 658 EXPORT_SYMBOL(iwl_is_ht40_tx_allowed);
 659
 660 static u16 iwl_adjust_beacon_interval(u16 beacon_val, u16 max_beacon_val)
 661 {
 662         u16 new_val = 0;
 663         u16 beacon_factor = 0;
 664
 665         beacon_factor = (beacon_val + max_beacon_val) / max_beacon_val;
 666         new_val = beacon_val / beacon_factor;
 667
 668         if (!new_val)
 669                 new_val = max_beacon_val;
 670
 671         return new_val;
 672 }
 673
 674 void iwl_setup_rxon_timing(struct iwl_priv *priv)
 675 {
 676         u64 tsf;
 677         s32 interval_tm, rem;
 678         unsigned long flags;
 679         struct ieee80211_conf *conf = NULL;
 680         u16 beacon_int;
 681
 682         conf = ieee80211_get_hw_conf(priv->hw);
 683
 684         spin_lock_irqsave(&priv->lock, flags);
 685         priv->rxon_timing.timestamp = cpu_to_le64(priv->timestamp);
 686         priv->rxon_timing.listen_interval = cpu_to_le16(conf->listen_interval);
 687
 688         if (priv->iw_mode == NL80211_IFTYPE_STATION) {
 689                 beacon_int = priv->beacon_int;
 690                 priv->rxon_timing.atim_window = 0;
 691         } else {
 692                 beacon_int = priv->vif->bss_conf.beacon_int;
 693
 694                 /* TODO: we need to get atim_window from upper stack
 695                  * for now we set to 0 */
 696                 priv->rxon_timing.atim_window = 0;
 697         }
 698
 699         beacon_int = iwl_adjust_beacon_interval(beacon_int,
 700                                 priv->hw_params.max_beacon_itrvl * 1024);
 701         priv->rxon_timing.beacon_interval = cpu_to_le16(beacon_int);
 702
 703         tsf = priv->timestamp; /* tsf is modifed by do_div: copy it */
 704         interval_tm = beacon_int * 1024;
 705         rem = do_div(tsf, interval_tm);
 706         priv->rxon_timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
 707
 708         spin_unlock_irqrestore(&priv->lock, flags);
 709         IWL_DEBUG_ASSOC(priv,
 710                         "beacon interval %d beacon timer %d beacon tim %d\n",
 711                         le16_to_cpu(priv->rxon_timing.beacon_interval),
 712                         le32_to_cpu(priv->rxon_timing.beacon_init_val),
 713                         le16_to_cpu(priv->rxon_timing.atim_window));
 714 }
 715 EXPORT_SYMBOL(iwl_setup_rxon_timing);
 716
 717 void iwl_set_rxon_hwcrypto(struct iwl_priv *priv, int hw_decrypt)
 718 {
 719         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
 720
 721         if (hw_decrypt)
 722                 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
 723         else
 724                 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
 725
 726 }
 727 EXPORT_SYMBOL(iwl_set_rxon_hwcrypto);
 728
 729 /**
 730  * iwl_check_rxon_cmd - validate RXON structure is valid
 731  *
 732  * NOTE:  This is really only useful during development and can eventually
 733  * be #ifdef'd out once the driver is stable and folks aren't actively
 734  * making changes
 735  */
 736 int iwl_check_rxon_cmd(struct iwl_priv *priv)
 737 {
 738         int error = 0;
 739         int counter = 1;
 740         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
 741
 742         if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
 743                 error |= le32_to_cpu(rxon->flags &
 744                                 (RXON_FLG_TGJ_NARROW_BAND_MSK |
 745                                  RXON_FLG_RADAR_DETECT_MSK));
 746                 if (error)
 747                         IWL_WARN(priv, "check 24G fields %d | %d\n",
 748                                     counter++, error);
 749         } else {
 750                 error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ?
 751                                 0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK);
 752                 if (error)
 753                         IWL_WARN(priv, "check 52 fields %d | %d\n",
 754                                     counter++, error);
 755                 error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK);
 756                 if (error)
 757                         IWL_WARN(priv, "check 52 CCK %d | %d\n",
 758                                     counter++, error);
 759         }
 760         error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1;
 761         if (error)
 762                 IWL_WARN(priv, "check mac addr %d | %d\n", counter++, error);
 763
 764         /* make sure basic rates 6Mbps and 1Mbps are supported */
 765         error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) &&
 766                   ((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0));
 767         if (error)
 768                 IWL_WARN(priv, "check basic rate %d | %d\n", counter++, error);
 769
 770         error |= (le16_to_cpu(rxon->assoc_id) > 2007);
 771         if (error)
 772                 IWL_WARN(priv, "check assoc id %d | %d\n", counter++, error);
 773
 774         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
 775                         == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK));
 776         if (error)
 777                 IWL_WARN(priv, "check CCK and short slot %d | %d\n",
 778                             counter++, error);
 779
 780         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
 781                         == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK));
 782         if (error)
 783                 IWL_WARN(priv, "check CCK & auto detect %d | %d\n",
 784                             counter++, error);
 785
 786         error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
 787                         RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK);
 788         if (error)
 789                 IWL_WARN(priv, "check TGG and auto detect %d | %d\n",
 790                             counter++, error);
 791
 792         if (error)
 793                 IWL_WARN(priv, "Tuning to channel %d\n",
 794                             le16_to_cpu(rxon->channel));
 795
 796         if (error) {
 797                 IWL_ERR(priv, "Not a valid iwl_rxon_assoc_cmd field values\n");
 798                 return -1;
 799         }
 800         return 0;
 801 }
 802 EXPORT_SYMBOL(iwl_check_rxon_cmd);
 803
 804 /**
 805  * iwl_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
 806  * @priv: staging_rxon is compared to active_rxon
 807  *
 808  * If the RXON structure is changing enough to require a new tune,
 809  * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
 810  * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
 811  */
 812 int iwl_full_rxon_required(struct iwl_priv *priv)
 813 {
 814
 815         /* These items are only settable from the full RXON command */
 816         if (!(iwl_is_associated(priv)) ||
 817             compare_ether_addr(priv->staging_rxon.bssid_addr,
 818                                priv->active_rxon.bssid_addr) ||
 819             compare_ether_addr(priv->staging_rxon.node_addr,
 820                                priv->active_rxon.node_addr) ||
 821             compare_ether_addr(priv->staging_rxon.wlap_bssid_addr,
 822                                priv->active_rxon.wlap_bssid_addr) ||
 823             (priv->staging_rxon.dev_type != priv->active_rxon.dev_type) ||
 824             (priv->staging_rxon.channel != priv->active_rxon.channel) ||
 825             (priv->staging_rxon.air_propagation !=
 826              priv->active_rxon.air_propagation) ||
 827             (priv->staging_rxon.ofdm_ht_single_stream_basic_rates !=
 828              priv->active_rxon.ofdm_ht_single_stream_basic_rates) ||
 829             (priv->staging_rxon.ofdm_ht_dual_stream_basic_rates !=
 830              priv->active_rxon.ofdm_ht_dual_stream_basic_rates) ||
 831             (priv->staging_rxon.ofdm_ht_triple_stream_basic_rates !=
 832              priv->active_rxon.ofdm_ht_triple_stream_basic_rates) ||
 833             (priv->staging_rxon.assoc_id != priv->active_rxon.assoc_id))
 834                 return 1;
 835
 836         /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
 837          * be updated with the RXON_ASSOC command -- however only some
 838          * flag transitions are allowed using RXON_ASSOC */
 839
 840         /* Check if we are not switching bands */
 841         if ((priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) !=
 842             (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK))
 843                 return 1;
 844
 845         /* Check if we are switching association toggle */
 846         if ((priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) !=
 847                 (priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK))
 848                 return 1;
 849
 850         return 0;
 851 }
 852 EXPORT_SYMBOL(iwl_full_rxon_required);
 853
 854 u8 iwl_rate_get_lowest_plcp(struct iwl_priv *priv)
 855 {
 856         int i;
 857         int rate_mask;
 858
 859         /* Set rate mask*/
 860         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)
 861                 rate_mask = priv->active_rate_basic & IWL_CCK_RATES_MASK;
 862         else
 863                 rate_mask = priv->active_rate_basic & IWL_OFDM_RATES_MASK;
 864
 865         /* Find lowest valid rate */
 866         for (i = IWL_RATE_1M_INDEX; i != IWL_RATE_INVALID;
 867                                         i = iwl_rates[i].next_ieee) {
 868                 if (rate_mask & (1 << i))
 869                         return iwl_rates[i].plcp;
 870         }
 871
 872         /* No valid rate was found. Assign the lowest one */
 873         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)
 874                 return IWL_RATE_1M_PLCP;
 875         else
 876                 return IWL_RATE_6M_PLCP;
 877 }
 878 EXPORT_SYMBOL(iwl_rate_get_lowest_plcp);
 879
 880 void iwl_set_rxon_ht(struct iwl_priv *priv, struct iwl_ht_info *ht_info)
 881 {
 882         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
 883
 884         if (!ht_info->is_ht) {
 885                 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
 886                         RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK |
 887                         RXON_FLG_HT40_PROT_MSK |
 888                         RXON_FLG_HT_PROT_MSK);
 889                 return;
 890         }
 891
 892         /* FIXME: if the definition of ht_protection changed, the "translation"
 893          * will be needed for rxon->flags
 894          */
 895         rxon->flags |= cpu_to_le32(ht_info->ht_protection << RXON_FLG_HT_OPERATING_MODE_POS);
 896
 897         /* Set up channel bandwidth:
 898          * 20 MHz only, 20/40 mixed or pure 40 if ht40 ok */
 899         /* clear the HT channel mode before set the mode */
 900         rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
 901                          RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
 902         if (iwl_is_ht40_tx_allowed(priv, NULL)) {
 903                 /* pure ht40 */
 904                 if (ht_info->ht_protection == IEEE80211_HT_OP_MODE_PROTECTION_20MHZ) {
 905                         rxon->flags |= RXON_FLG_CHANNEL_MODE_PURE_40;
 906                         /* Note: control channel is opposite of extension channel */
 907                         switch (ht_info->extension_chan_offset) {
 908                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 909                                 rxon->flags &= ~RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
 910                                 break;
 911                         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 912                                 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
 913                                 break;
 914                         }
 915                 } else {
 916                         /* Note: control channel is opposite of extension channel */
 917                         switch (ht_info->extension_chan_offset) {
 918                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 919                                 rxon->flags &= ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
 920                                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
 921                                 break;
 922                         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 923                                 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
 924                                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
 925                                 break;
 926                         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
 927                         default:
 928                                 /* channel location only valid if in Mixed mode */
 929                                 IWL_ERR(priv, "invalid extension channel offset\n");
 930                                 break;
 931                         }
 932                 }
 933         } else {
 934                 rxon->flags |= RXON_FLG_CHANNEL_MODE_LEGACY;
 935         }
 936
 937         if (priv->cfg->ops->hcmd->set_rxon_chain)
 938                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
 939
 940         IWL_DEBUG_ASSOC(priv, "supported HT rate 0x%X 0x%X 0x%X "
 941                         "rxon flags 0x%X operation mode :0x%X "
 942                         "extension channel offset 0x%x\n",
 943                         ht_info->mcs.rx_mask[0],
 944                         ht_info->mcs.rx_mask[1],
 945                         ht_info->mcs.rx_mask[2],
 946                         le32_to_cpu(rxon->flags), ht_info->ht_protection,
 947                         ht_info->extension_chan_offset);
 948         return;
 949 }
 950 EXPORT_SYMBOL(iwl_set_rxon_ht);
 951
 952 #define IWL_NUM_RX_CHAINS_MULTIPLE      3
 953 #define IWL_NUM_RX_CHAINS_SINGLE        2
 954 #define IWL_NUM_IDLE_CHAINS_DUAL        2
 955 #define IWL_NUM_IDLE_CHAINS_SINGLE      1
 956
 957 /* Determine how many receiver/antenna chains to use.
 958  * More provides better reception via diversity.  Fewer saves power.
 959  * MIMO (dual stream) requires at least 2, but works better with 3.
 960  * This does not determine *which* chains to use, just how many.
 961  */
 962 static int iwl_get_active_rx_chain_count(struct iwl_priv *priv)
 963 {
 964         bool is_single = is_single_rx_stream(priv);
 965         bool is_cam = !test_bit(STATUS_POWER_PMI, &priv->status);
 966
 967         /* # of Rx chains to use when expecting MIMO. */
 968         if (is_single || (!is_cam && (priv->current_ht_config.sm_ps ==
 969                                                  WLAN_HT_CAP_SM_PS_STATIC)))
 970                 return IWL_NUM_RX_CHAINS_SINGLE;
 971         else
 972                 return IWL_NUM_RX_CHAINS_MULTIPLE;
 973 }
 974
 975 static int iwl_get_idle_rx_chain_count(struct iwl_priv *priv, int active_cnt)
 976 {
 977         int idle_cnt;
 978         bool is_cam = !test_bit(STATUS_POWER_PMI, &priv->status);
 979         /* # Rx chains when idling and maybe trying to save power */
 980         switch (priv->current_ht_config.sm_ps) {
 981         case WLAN_HT_CAP_SM_PS_STATIC:
 982         case WLAN_HT_CAP_SM_PS_DYNAMIC:
 983                 idle_cnt = (is_cam) ? IWL_NUM_IDLE_CHAINS_DUAL :
 984                                         IWL_NUM_IDLE_CHAINS_SINGLE;
 985                 break;
 986         case WLAN_HT_CAP_SM_PS_DISABLED:
 987                 idle_cnt = (is_cam) ? active_cnt : IWL_NUM_IDLE_CHAINS_SINGLE;
 988                 break;
 989         case WLAN_HT_CAP_SM_PS_INVALID:
 990         default:
 991                 IWL_ERR(priv, "invalid mimo ps mode %d\n",
 992                            priv->current_ht_config.sm_ps);
 993                 WARN_ON(1);
 994                 idle_cnt = -1;
 995                 break;
 996         }
 997         return idle_cnt;
 998 }
 999
1000 /* up to 4 chains */
1001 static u8 iwl_count_chain_bitmap(u32 chain_bitmap)
1002 {
1003         u8 res;
1004         res = (chain_bitmap & BIT(0)) >> 0;
1005         res += (chain_bitmap & BIT(1)) >> 1;
1006         res += (chain_bitmap & BIT(2)) >> 2;
1007         res += (chain_bitmap & BIT(4)) >> 4;
1008         return res;
1009 }
1010
1011 /**
1012  * iwl_is_monitor_mode - Determine if interface in monitor mode
1013  *
1014  * priv->iw_mode is set in add_interface, but add_interface is
1015  * never called for monitor mode. The only way mac80211 informs us about
1016  * monitor mode is through configuring filters (call to configure_filter).
1017  */
1018 bool iwl_is_monitor_mode(struct iwl_priv *priv)
1019 {
1020         return !!(priv->staging_rxon.filter_flags & RXON_FILTER_PROMISC_MSK);
1021 }
1022 EXPORT_SYMBOL(iwl_is_monitor_mode);
1023
1024 /**
1025  * iwl_set_rxon_chain - Set up Rx chain usage in "staging" RXON image
1026  *
1027  * Selects how many and which Rx receivers/antennas/chains to use.
1028  * This should not be used for scan command ... it puts data in wrong place.
1029  */
1030 void iwl_set_rxon_chain(struct iwl_priv *priv)
1031 {
1032         bool is_single = is_single_rx_stream(priv);
1033         bool is_cam = !test_bit(STATUS_POWER_PMI, &priv->status);
1034         u8 idle_rx_cnt, active_rx_cnt, valid_rx_cnt;
1035         u32 active_chains;
1036         u16 rx_chain;
1037
1038         /* Tell uCode which antennas are actually connected.
1039          * Before first association, we assume all antennas are connected.
1040          * Just after first association, iwl_chain_noise_calibration()
1041          *    checks which antennas actually *are* connected. */
1042          if (priv->chain_noise_data.active_chains)
1043                 active_chains = priv->chain_noise_data.active_chains;
1044         else
1045                 active_chains = priv->hw_params.valid_rx_ant;
1046
1047         rx_chain = active_chains << RXON_RX_CHAIN_VALID_POS;
1048
1049         /* How many receivers should we use? */
1050         active_rx_cnt = iwl_get_active_rx_chain_count(priv);
1051         idle_rx_cnt = iwl_get_idle_rx_chain_count(priv, active_rx_cnt);
1052
1053
1054         /* correct rx chain count according hw settings
1055          * and chain noise calibration
1056          */
1057         valid_rx_cnt = iwl_count_chain_bitmap(active_chains);
1058         if (valid_rx_cnt < active_rx_cnt)
1059                 active_rx_cnt = valid_rx_cnt;
1060
1061         if (valid_rx_cnt < idle_rx_cnt)
1062                 idle_rx_cnt = valid_rx_cnt;
1063
1064         rx_chain |= active_rx_cnt << RXON_RX_CHAIN_MIMO_CNT_POS;
1065         rx_chain |= idle_rx_cnt  << RXON_RX_CHAIN_CNT_POS;
1066
1067         /* copied from 'iwl_bg_request_scan()' */
1068         /* Force use of chains B and C (0x6) for Rx for 4965
1069          * Avoid A (0x1) because of its off-channel reception on A-band.
1070          * MIMO is not used here, but value is required */
1071         if (iwl_is_monitor_mode(priv) &&
1072             !(priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) &&
1073             ((priv->hw_rev & CSR_HW_REV_TYPE_MSK) == CSR_HW_REV_TYPE_4965)) {
1074                 rx_chain = ANT_ABC << RXON_RX_CHAIN_VALID_POS;
1075                 rx_chain |= ANT_BC << RXON_RX_CHAIN_FORCE_SEL_POS;
1076                 rx_chain |= ANT_ABC << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS;
1077                 rx_chain |= 0x1 << RXON_RX_CHAIN_DRIVER_FORCE_POS;
1078         }
1079
1080         priv->staging_rxon.rx_chain = cpu_to_le16(rx_chain);
1081
1082         if (!is_single && (active_rx_cnt >= IWL_NUM_RX_CHAINS_SINGLE) && is_cam)
1083                 priv->staging_rxon.rx_chain |= RXON_RX_CHAIN_MIMO_FORCE_MSK;
1084         else
1085                 priv->staging_rxon.rx_chain &= ~RXON_RX_CHAIN_MIMO_FORCE_MSK;
1086
1087         IWL_DEBUG_ASSOC(priv, "rx_chain=0x%X active=%d idle=%d\n",
1088                         priv->staging_rxon.rx_chain,
1089                         active_rx_cnt, idle_rx_cnt);
1090
1091         WARN_ON(active_rx_cnt == 0 || idle_rx_cnt == 0 ||
1092                 active_rx_cnt < idle_rx_cnt);
1093 }
1094 EXPORT_SYMBOL(iwl_set_rxon_chain);
1095
1096 /**
1097  * iwl_set_rxon_channel - Set the phymode and channel values in staging RXON
1098  * @phymode: MODE_IEEE80211A sets to 5.2GHz; all else set to 2.4GHz
1099  * @channel: Any channel valid for the requested phymode
1100
1101  * In addition to setting the staging RXON, priv->phymode is also set.
1102  *
1103  * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
1104  * in the staging RXON flag structure based on the phymode
1105  */
1106 int iwl_set_rxon_channel(struct iwl_priv *priv, struct ieee80211_channel *ch)
1107 {
1108         enum ieee80211_band band = ch->band;
1109         u16 channel = ieee80211_frequency_to_channel(ch->center_freq);
1110
1111         if (!iwl_get_channel_info(priv, band, channel)) {
1112                 IWL_DEBUG_INFO(priv, "Could not set channel to %d [%d]\n",
1113                                channel, band);
1114                 return -EINVAL;
1115         }
1116
1117         if ((le16_to_cpu(priv->staging_rxon.channel) == channel) &&
1118             (priv->band == band))
1119                 return 0;
1120
1121         priv->staging_rxon.channel = cpu_to_le16(channel);
1122         if (band == IEEE80211_BAND_5GHZ)
1123                 priv->staging_rxon.flags &= ~RXON_FLG_BAND_24G_MSK;
1124         else
1125                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
1126
1127         priv->band = band;
1128
1129         IWL_DEBUG_INFO(priv, "Staging channel set to %d [%d]\n", channel, band);
1130
1131         return 0;
1132 }
1133 EXPORT_SYMBOL(iwl_set_rxon_channel);
1134
1135 void iwl_set_flags_for_band(struct iwl_priv *priv,
1136                             enum ieee80211_band band)
1137 {
1138         if (band == IEEE80211_BAND_5GHZ) {
1139                 priv->staging_rxon.flags &=
1140                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
1141                       | RXON_FLG_CCK_MSK);
1142                 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
1143         } else {
1144                 /* Copied from iwl_post_associate() */
1145                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
1146                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
1147                 else
1148                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
1149
1150                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
1151                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
1152
1153                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
1154                 priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
1155                 priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
1156         }
1157 }
1158
1159 /*
1160  * initialize rxon structure with default values from eeprom
1161  */
1162 void iwl_connection_init_rx_config(struct iwl_priv *priv, int mode)
1163 {
1164         const struct iwl_channel_info *ch_info;
1165
1166         memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
1167
1168         switch (mode) {
1169         case NL80211_IFTYPE_AP:
1170                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
1171                 break;
1172
1173         case NL80211_IFTYPE_STATION:
1174                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
1175                 priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
1176                 break;
1177
1178         case NL80211_IFTYPE_ADHOC:
1179                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
1180                 priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
1181                 priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
1182                                                   RXON_FILTER_ACCEPT_GRP_MSK;
1183                 break;
1184
1185         default:
1186                 IWL_ERR(priv, "Unsupported interface type %d\n", mode);
1187                 break;
1188         }
1189
1190 #if 0
1191         /* TODO:  Figure out when short_preamble would be set and cache from
1192          * that */
1193         if (!hw_to_local(priv->hw)->short_preamble)
1194                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
1195         else
1196                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
1197 #endif
1198
1199         ch_info = iwl_get_channel_info(priv, priv->band,
1200                                        le16_to_cpu(priv->active_rxon.channel));
1201
1202         if (!ch_info)
1203                 ch_info = &priv->channel_info[0];
1204
1205         /*
1206          * in some case A channels are all non IBSS
1207          * in this case force B/G channel
1208          */
1209         if ((priv->iw_mode == NL80211_IFTYPE_ADHOC) &&
1210             !(is_channel_ibss(ch_info)))
1211                 ch_info = &priv->channel_info[0];
1212
1213         priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
1214         priv->band = ch_info->band;
1215
1216         iwl_set_flags_for_band(priv, priv->band);
1217
1218         priv->staging_rxon.ofdm_basic_rates =
1219             (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
1220         priv->staging_rxon.cck_basic_rates =
1221             (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
1222
1223         /* clear both MIX and PURE40 mode flag */
1224         priv->staging_rxon.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED |
1225                                         RXON_FLG_CHANNEL_MODE_PURE_40);
1226         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
1227         memcpy(priv->staging_rxon.wlap_bssid_addr, priv->mac_addr, ETH_ALEN);
1228         priv->staging_rxon.ofdm_ht_single_stream_basic_rates = 0xff;
1229         priv->staging_rxon.ofdm_ht_dual_stream_basic_rates = 0xff;
1230         priv->staging_rxon.ofdm_ht_triple_stream_basic_rates = 0xff;
1231 }
1232 EXPORT_SYMBOL(iwl_connection_init_rx_config);
1233
1234 static void iwl_set_rate(struct iwl_priv *priv)
1235 {
1236         const struct ieee80211_supported_band *hw = NULL;
1237         struct ieee80211_rate *rate;
1238         int i;
1239
1240         hw = iwl_get_hw_mode(priv, priv->band);
1241         if (!hw) {
1242                 IWL_ERR(priv, "Failed to set rate: unable to get hw mode\n");
1243                 return;
1244         }
1245
1246         priv->active_rate = 0;
1247         priv->active_rate_basic = 0;
1248
1249         for (i = 0; i < hw->n_bitrates; i++) {
1250                 rate = &(hw->bitrates[i]);
1251                 if (rate->hw_value < IWL_RATE_COUNT_LEGACY)
1252                         priv->active_rate |= (1 << rate->hw_value);
1253         }
1254
1255         IWL_DEBUG_RATE(priv, "Set active_rate = %0x, active_rate_basic = %0x\n",
1256                        priv->active_rate, priv->active_rate_basic);
1257
1258         /*
1259          * If a basic rate is configured, then use it (adding IWL_RATE_1M_MASK)
1260          * otherwise set it to the default of all CCK rates and 6, 12, 24 for
1261          * OFDM
1262          */
1263         if (priv->active_rate_basic & IWL_CCK_BASIC_RATES_MASK)
1264                 priv->staging_rxon.cck_basic_rates =
1265                     ((priv->active_rate_basic &
1266                       IWL_CCK_RATES_MASK) >> IWL_FIRST_CCK_RATE) & 0xF;
1267         else
1268                 priv->staging_rxon.cck_basic_rates =
1269                     (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
1270
1271         if (priv->active_rate_basic & IWL_OFDM_BASIC_RATES_MASK)
1272                 priv->staging_rxon.ofdm_basic_rates =
1273                     ((priv->active_rate_basic &
1274                       (IWL_OFDM_BASIC_RATES_MASK | IWL_RATE_6M_MASK)) >>
1275                       IWL_FIRST_OFDM_RATE) & 0xFF;
1276         else
1277                 priv->staging_rxon.ofdm_basic_rates =
1278                    (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
1279 }
1280
1281 void iwl_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
1282 {
1283         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
1284         struct iwl_rxon_cmd *rxon = (void *)&priv->active_rxon;
1285         struct iwl_csa_notification *csa = &(pkt->u.csa_notif);
1286         IWL_DEBUG_11H(priv, "CSA notif: channel %d, status %d\n",
1287                       le16_to_cpu(csa->channel), le32_to_cpu(csa->status));
1288         rxon->channel = csa->channel;
1289         priv->staging_rxon.channel = csa->channel;
1290 }
1291 EXPORT_SYMBOL(iwl_rx_csa);
1292
1293 #ifdef CONFIG_IWLWIFI_DEBUG
1294 static void iwl_print_rx_config_cmd(struct iwl_priv *priv)
1295 {
1296         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
1297
1298         IWL_DEBUG_RADIO(priv, "RX CONFIG:\n");
1299         iwl_print_hex_dump(priv, IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
1300         IWL_DEBUG_RADIO(priv, "u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
1301         IWL_DEBUG_RADIO(priv, "u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
1302         IWL_DEBUG_RADIO(priv, "u32 filter_flags: 0x%08x\n",
1303                         le32_to_cpu(rxon->filter_flags));
1304         IWL_DEBUG_RADIO(priv, "u8 dev_type: 0x%x\n", rxon->dev_type);
1305         IWL_DEBUG_RADIO(priv, "u8 ofdm_basic_rates: 0x%02x\n",
1306                         rxon->ofdm_basic_rates);
1307         IWL_DEBUG_RADIO(priv, "u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
1308         IWL_DEBUG_RADIO(priv, "u8[6] node_addr: %pM\n", rxon->node_addr);
1309         IWL_DEBUG_RADIO(priv, "u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
1310         IWL_DEBUG_RADIO(priv, "u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
1311 }
1312 #endif
1313 /**
1314  * iwl_irq_handle_error - called for HW or SW error interrupt from card
1315  */
1316 void iwl_irq_handle_error(struct iwl_priv *priv)
1317 {
1318         /* Set the FW error flag -- cleared on iwl_down */
1319         set_bit(STATUS_FW_ERROR, &priv->status);
1320
1321         /* Cancel currently queued command. */
1322         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
1323
1324 #ifdef CONFIG_IWLWIFI_DEBUG
1325         if (iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) {
1326                 priv->cfg->ops->lib->dump_nic_error_log(priv);
1327                 priv->cfg->ops->lib->dump_nic_event_log(priv);
1328                 iwl_print_rx_config_cmd(priv);
1329         }
1330 #endif
1331
1332         wake_up_interruptible(&priv->wait_command_queue);
1333
1334         /* Keep the restart process from trying to send host
1335          * commands by clearing the INIT status bit */
1336         clear_bit(STATUS_READY, &priv->status);
1337
1338         if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1339                 IWL_DEBUG(priv, IWL_DL_FW_ERRORS,
1340                           "Restarting adapter due to uCode error.\n");
1341
1342                 if (priv->cfg->mod_params->restart_fw)
1343                         queue_work(priv->workqueue, &priv->restart);
1344         }
1345 }
1346 EXPORT_SYMBOL(iwl_irq_handle_error);
1347
1348 void iwl_configure_filter(struct ieee80211_hw *hw,
1349                           unsigned int changed_flags,
1350                           unsigned int *total_flags,
1351                           u64 multicast)
1352 {
1353         struct iwl_priv *priv = hw->priv;
1354         __le32 *filter_flags = &priv->staging_rxon.filter_flags;
1355
1356         IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
1357                         changed_flags, *total_flags);
1358
1359         if (changed_flags & (FIF_OTHER_BSS | FIF_PROMISC_IN_BSS)) {
1360                 if (*total_flags & (FIF_OTHER_BSS | FIF_PROMISC_IN_BSS))
1361                         *filter_flags |= RXON_FILTER_PROMISC_MSK;
1362                 else
1363                         *filter_flags &= ~RXON_FILTER_PROMISC_MSK;
1364         }
1365         if (changed_flags & FIF_ALLMULTI) {
1366                 if (*total_flags & FIF_ALLMULTI)
1367                         *filter_flags |= RXON_FILTER_ACCEPT_GRP_MSK;
1368                 else
1369                         *filter_flags &= ~RXON_FILTER_ACCEPT_GRP_MSK;
1370         }
1371         if (changed_flags & FIF_CONTROL) {
1372                 if (*total_flags & FIF_CONTROL)
1373                         *filter_flags |= RXON_FILTER_CTL2HOST_MSK;
1374                 else
1375                         *filter_flags &= ~RXON_FILTER_CTL2HOST_MSK;
1376         }
1377         if (changed_flags & FIF_BCN_PRBRESP_PROMISC) {
1378                 if (*total_flags & FIF_BCN_PRBRESP_PROMISC)
1379                         *filter_flags |= RXON_FILTER_BCON_AWARE_MSK;
1380                 else
1381                         *filter_flags &= ~RXON_FILTER_BCON_AWARE_MSK;
1382         }
1383
1384         /* We avoid iwl_commit_rxon here to commit the new filter flags
1385          * since mac80211 will call ieee80211_hw_config immediately.
1386          * (mc_list is not supported at this time). Otherwise, we need to
1387          * queue a background iwl_commit_rxon work.
1388          */
1389
1390         *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
1391                         FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
1392 }
1393 EXPORT_SYMBOL(iwl_configure_filter);
1394
1395 int iwl_setup_mac(struct iwl_priv *priv)
1396 {
1397         int ret;
1398         struct ieee80211_hw *hw = priv->hw;
1399         hw->rate_control_algorithm = "iwl-agn-rs";
1400
1401         /* Tell mac80211 our characteristics */
1402         hw->flags = IEEE80211_HW_SIGNAL_DBM |
1403                     IEEE80211_HW_NOISE_DBM |
1404                     IEEE80211_HW_AMPDU_AGGREGATION |
1405                     IEEE80211_HW_SPECTRUM_MGMT;
1406
1407         if (!priv->cfg->broken_powersave)
1408                 hw->flags |= IEEE80211_HW_SUPPORTS_PS |
1409                              IEEE80211_HW_SUPPORTS_DYNAMIC_PS;
1410
1411         hw->wiphy->interface_modes =
1412                 BIT(NL80211_IFTYPE_STATION) |
1413                 BIT(NL80211_IFTYPE_ADHOC);
1414
1415         hw->wiphy->custom_regulatory = true;
1416
1417         /* Firmware does not support this */
1418         hw->wiphy->disable_beacon_hints = true;
1419
1420         /*
1421          * For now, disable PS by default because it affects
1422          * RX performance significantly.
1423          */
1424         hw->wiphy->ps_default = false;
1425
1426         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
1427         /* we create the 802.11 header and a zero-length SSID element */
1428         hw->wiphy->max_scan_ie_len = IWL_MAX_PROBE_REQUEST - 24 - 2;
1429
1430         /* Default value; 4 EDCA QOS priorities */
1431         hw->queues = 4;
1432
1433         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
1434
1435         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
1436                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
1437                         &priv->bands[IEEE80211_BAND_2GHZ];
1438         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
1439                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
1440                         &priv->bands[IEEE80211_BAND_5GHZ];
1441
1442         ret = ieee80211_register_hw(priv->hw);
1443         if (ret) {
1444                 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
1445                 return ret;
1446         }
1447         priv->mac80211_registered = 1;
1448
1449         return 0;
1450 }
1451 EXPORT_SYMBOL(iwl_setup_mac);
1452
1453 int iwl_set_hw_params(struct iwl_priv *priv)
1454 {
1455         priv->hw_params.max_rxq_size = RX_QUEUE_SIZE;
1456         priv->hw_params.max_rxq_log = RX_QUEUE_SIZE_LOG;
1457         if (priv->cfg->mod_params->amsdu_size_8K)
1458                 priv->hw_params.rx_buf_size = IWL_RX_BUF_SIZE_8K;
1459         else
1460                 priv->hw_params.rx_buf_size = IWL_RX_BUF_SIZE_4K;
1461         priv->hw_params.max_pkt_size = priv->hw_params.rx_buf_size - 256;
1462
1463         priv->hw_params.max_beacon_itrvl = IWL_MAX_UCODE_BEACON_INTERVAL;
1464
1465         if (priv->cfg->mod_params->disable_11n)
1466                 priv->cfg->sku &= ~IWL_SKU_N;
1467
1468         /* Device-specific setup */
1469         return priv->cfg->ops->lib->set_hw_params(priv);
1470 }
1471 EXPORT_SYMBOL(iwl_set_hw_params);
1472
1473 int iwl_init_drv(struct iwl_priv *priv)
1474 {
1475         int ret;
1476
1477         priv->ibss_beacon = NULL;
1478
1479         spin_lock_init(&priv->lock);
1480         spin_lock_init(&priv->sta_lock);
1481         spin_lock_init(&priv->hcmd_lock);
1482
1483         INIT_LIST_HEAD(&priv->free_frames);
1484
1485         mutex_init(&priv->mutex);
1486
1487         /* Clear the driver's (not device's) station table */
1488         iwl_clear_stations_table(priv);
1489
1490         priv->data_retry_limit = -1;
1491         priv->ieee_channels = NULL;
1492         priv->ieee_rates = NULL;
1493         priv->band = IEEE80211_BAND_2GHZ;
1494
1495         priv->iw_mode = NL80211_IFTYPE_STATION;
1496
1497         priv->current_ht_config.sm_ps = WLAN_HT_CAP_SM_PS_DISABLED;
1498
1499         /* Choose which receivers/antennas to use */
1500         if (priv->cfg->ops->hcmd->set_rxon_chain)
1501                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
1502
1503         iwl_init_scan_params(priv);
1504
1505         iwl_reset_qos(priv);
1506
1507         priv->qos_data.qos_active = 0;
1508         priv->qos_data.qos_cap.val = 0;
1509
1510         priv->rates_mask = IWL_RATES_MASK;
1511         /* Set the tx_power_user_lmt to the lowest power level
1512          * this value will get overwritten by channel max power avg
1513          * from eeprom */
1514         priv->tx_power_user_lmt = IWL_TX_POWER_TARGET_POWER_MIN;
1515
1516         ret = iwl_init_channel_map(priv);
1517         if (ret) {
1518                 IWL_ERR(priv, "initializing regulatory failed: %d\n", ret);
1519                 goto err;
1520         }
1521
1522         ret = iwlcore_init_geos(priv);
1523         if (ret) {
1524                 IWL_ERR(priv, "initializing geos failed: %d\n", ret);
1525                 goto err_free_channel_map;
1526         }
1527         iwlcore_init_hw_rates(priv, priv->ieee_rates);
1528
1529         return 0;
1530
1531 err_free_channel_map:
1532         iwl_free_channel_map(priv);
1533 err:
1534         return ret;
1535 }
1536 EXPORT_SYMBOL(iwl_init_drv);
1537
1538 int iwl_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force)
1539 {
1540         int ret = 0;
1541         s8 prev_tx_power = priv->tx_power_user_lmt;
1542
1543         if (tx_power < IWL_TX_POWER_TARGET_POWER_MIN) {
1544                 IWL_WARN(priv, "Requested user TXPOWER %d below lower limit %d.\n",
1545                          tx_power,
1546                          IWL_TX_POWER_TARGET_POWER_MIN);
1547                 return -EINVAL;
1548         }
1549
1550         if (tx_power > priv->tx_power_device_lmt) {
1551                 IWL_WARN(priv,
1552                         "Requested user TXPOWER %d above upper limit %d.\n",
1553                          tx_power, priv->tx_power_device_lmt);
1554                 return -EINVAL;
1555         }
1556
1557         if (priv->tx_power_user_lmt != tx_power)
1558                 force = true;
1559
1560         /* if nic is not up don't send command */
1561         if (iwl_is_ready_rf(priv)) {
1562                 priv->tx_power_user_lmt = tx_power;
1563                 if (force && priv->cfg->ops->lib->send_tx_power)
1564                         ret = priv->cfg->ops->lib->send_tx_power(priv);
1565                 else if (!priv->cfg->ops->lib->send_tx_power)
1566                         ret = -EOPNOTSUPP;
1567                 /*
1568                  * if fail to set tx_power, restore the orig. tx power
1569                  */
1570                 if (ret)
1571                         priv->tx_power_user_lmt = prev_tx_power;
1572         }
1573
1574         /*
1575          * Even this is an async host command, the command
1576          * will always report success from uCode
1577          * So once driver can placing the command into the queue
1578          * successfully, driver can use priv->tx_power_user_lmt
1579          * to reflect the current tx power
1580          */
1581         return ret;
1582 }
1583 EXPORT_SYMBOL(iwl_set_tx_power);
1584
1585 void iwl_uninit_drv(struct iwl_priv *priv)
1586 {
1587         iwl_calib_free_results(priv);
1588         iwlcore_free_geos(priv);
1589         iwl_free_channel_map(priv);
1590         kfree(priv->scan);
1591 }
1592 EXPORT_SYMBOL(iwl_uninit_drv);
1593
1594 #define ICT_COUNT (PAGE_SIZE/sizeof(u32))
1595
1596 /* Free dram table */
1597 void iwl_free_isr_ict(struct iwl_priv *priv)
1598 {
1599         if (priv->ict_tbl_vir) {
1600                 pci_free_consistent(priv->pci_dev, (sizeof(u32) * ICT_COUNT) +
1601                                         PAGE_SIZE, priv->ict_tbl_vir,
1602                                         priv->ict_tbl_dma);
1603                 priv->ict_tbl_vir = NULL;
1604         }
1605 }
1606 EXPORT_SYMBOL(iwl_free_isr_ict);
1607
1608
1609 /* allocate dram shared table it is a PAGE_SIZE aligned
1610  * also reset all data related to ICT table interrupt.
1611  */
1612 int iwl_alloc_isr_ict(struct iwl_priv *priv)
1613 {
1614
1615         if (priv->cfg->use_isr_legacy)
1616                 return 0;
1617         /* allocate shrared data table */
1618         priv->ict_tbl_vir = pci_alloc_consistent(priv->pci_dev, (sizeof(u32) *
1619                                                   ICT_COUNT) + PAGE_SIZE,
1620                                                   &priv->ict_tbl_dma);
1621         if (!priv->ict_tbl_vir)
1622                 return -ENOMEM;
1623
1624         /* align table to PAGE_SIZE boundry */
1625         priv->aligned_ict_tbl_dma = ALIGN(priv->ict_tbl_dma, PAGE_SIZE);
1626
1627         IWL_DEBUG_ISR(priv, "ict dma addr %Lx dma aligned %Lx diff %d\n",
1628                              (unsigned long long)priv->ict_tbl_dma,
1629                              (unsigned long long)priv->aligned_ict_tbl_dma,
1630                         (int)(priv->aligned_ict_tbl_dma - priv->ict_tbl_dma));
1631
1632         priv->ict_tbl =  priv->ict_tbl_vir +
1633                           (priv->aligned_ict_tbl_dma - priv->ict_tbl_dma);
1634
1635         IWL_DEBUG_ISR(priv, "ict vir addr %p vir aligned %p diff %d\n",
1636                              priv->ict_tbl, priv->ict_tbl_vir,
1637                         (int)(priv->aligned_ict_tbl_dma - priv->ict_tbl_dma));
1638
1639         /* reset table and index to all 0 */
1640         memset(priv->ict_tbl_vir,0, (sizeof(u32) * ICT_COUNT) + PAGE_SIZE);
1641         priv->ict_index = 0;
1642
1643         /* add periodic RX interrupt */
1644         priv->inta_mask |= CSR_INT_BIT_RX_PERIODIC;
1645         return 0;
1646 }
1647 EXPORT_SYMBOL(iwl_alloc_isr_ict);
1648
1649 /* Device is going up inform it about using ICT interrupt table,
1650  * also we need to tell the driver to start using ICT interrupt.
1651  */
1652 int iwl_reset_ict(struct iwl_priv *priv)
1653 {
1654         u32 val;
1655         unsigned long flags;
1656
1657         if (!priv->ict_tbl_vir)
1658                 return 0;
1659
1660         spin_lock_irqsave(&priv->lock, flags);
1661         iwl_disable_interrupts(priv);
1662
1663         memset(&priv->ict_tbl[0], 0, sizeof(u32) * ICT_COUNT);
1664
1665         val = priv->aligned_ict_tbl_dma >> PAGE_SHIFT;
1666
1667         val |= CSR_DRAM_INT_TBL_ENABLE;
1668         val |= CSR_DRAM_INIT_TBL_WRAP_CHECK;
1669
1670         IWL_DEBUG_ISR(priv, "CSR_DRAM_INT_TBL_REG =0x%X "
1671                         "aligned dma address %Lx\n",
1672                         val, (unsigned long long)priv->aligned_ict_tbl_dma);
1673
1674         iwl_write32(priv, CSR_DRAM_INT_TBL_REG, val);
1675         priv->use_ict = true;
1676         priv->ict_index = 0;
1677         iwl_write32(priv, CSR_INT, priv->inta_mask);
1678         iwl_enable_interrupts(priv);
1679         spin_unlock_irqrestore(&priv->lock, flags);
1680
1681         return 0;
1682 }
1683 EXPORT_SYMBOL(iwl_reset_ict);
1684
1685 /* Device is going down disable ict interrupt usage */
1686 void iwl_disable_ict(struct iwl_priv *priv)
1687 {
1688         unsigned long flags;
1689
1690         spin_lock_irqsave(&priv->lock, flags);
1691         priv->use_ict = false;
1692         spin_unlock_irqrestore(&priv->lock, flags);
1693 }
1694 EXPORT_SYMBOL(iwl_disable_ict);
1695
1696 /* interrupt handler using ict table, with this interrupt driver will
1697  * stop using INTA register to get device's interrupt, reading this register
1698  * is expensive, device will write interrupts in ICT dram table, increment
1699  * index then will fire interrupt to driver, driver will OR all ICT table
1700  * entries from current index up to table entry with 0 value. the result is
1701  * the interrupt we need to service, driver will set the entries back to 0 and
1702  * set index.
1703  */
1704 irqreturn_t iwl_isr_ict(int irq, void *data)
1705 {
1706         struct iwl_priv *priv = data;
1707         u32 inta, inta_mask;
1708         u32 val = 0;
1709
1710         if (!priv)
1711                 return IRQ_NONE;
1712
1713         /* dram interrupt table not set yet,
1714          * use legacy interrupt.
1715          */
1716         if (!priv->use_ict)
1717                 return iwl_isr(irq, data);
1718
1719         spin_lock(&priv->lock);
1720
1721         /* Disable (but don't clear!) interrupts here to avoid
1722          * back-to-back ISRs and sporadic interrupts from our NIC.
1723          * If we have something to service, the tasklet will re-enable ints.
1724          * If we *don't* have something, we'll re-enable before leaving here.
1725          */
1726         inta_mask = iwl_read32(priv, CSR_INT_MASK);  /* just for debug */
1727         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
1728
1729
1730         /* Ignore interrupt if there's nothing in NIC to service.
1731          * This may be due to IRQ shared with another device,
1732          * or due to sporadic interrupts thrown from our NIC. */
1733         if (!priv->ict_tbl[priv->ict_index]) {
1734                 IWL_DEBUG_ISR(priv, "Ignore interrupt, inta == 0\n");
1735                 goto none;
1736         }
1737
1738         /* read all entries that not 0 start with ict_index */
1739         while (priv->ict_tbl[priv->ict_index]) {
1740
1741                 val |= le32_to_cpu(priv->ict_tbl[priv->ict_index]);
1742                 IWL_DEBUG_ISR(priv, "ICT index %d value 0x%08X\n",
1743                                 priv->ict_index,
1744                                 le32_to_cpu(priv->ict_tbl[priv->ict_index]));
1745                 priv->ict_tbl[priv->ict_index] = 0;
1746                 priv->ict_index = iwl_queue_inc_wrap(priv->ict_index,
1747                                                      ICT_COUNT);
1748
1749         }
1750
1751         /* We should not get this value, just ignore it. */
1752         if (val == 0xffffffff)
1753                 val = 0;
1754
1755         inta = (0xff & val) | ((0xff00 & val) << 16);
1756         IWL_DEBUG_ISR(priv, "ISR inta 0x%08x, enabled 0x%08x ict 0x%08x\n",
1757                         inta, inta_mask, val);
1758
1759         inta &= priv->inta_mask;
1760         priv->inta |= inta;
1761
1762         /* iwl_irq_tasklet() will service interrupts and re-enable them */
1763         if (likely(inta))
1764                 tasklet_schedule(&priv->irq_tasklet);
1765         else if (test_bit(STATUS_INT_ENABLED, &priv->status) && !priv->inta) {
1766                 /* Allow interrupt if was disabled by this handler and
1767                  * no tasklet was schedules, We should not enable interrupt,
1768                  * tasklet will enable it.
1769                  */
1770                 iwl_enable_interrupts(priv);
1771         }
1772
1773         spin_unlock(&priv->lock);
1774         return IRQ_HANDLED;
1775
1776  none:
1777         /* re-enable interrupts here since we don't have anything to service.
1778          * only Re-enable if disabled by irq.
1779          */
1780         if (test_bit(STATUS_INT_ENABLED, &priv->status) && !priv->inta)
1781                 iwl_enable_interrupts(priv);
1782
1783         spin_unlock(&priv->lock);
1784         return IRQ_NONE;
1785 }
1786 EXPORT_SYMBOL(iwl_isr_ict);
1787
1788
1789 static irqreturn_t iwl_isr(int irq, void *data)
1790 {
1791         struct iwl_priv *priv = data;
1792         u32 inta, inta_mask;
1793 #ifdef CONFIG_IWLWIFI_DEBUG
1794         u32 inta_fh;
1795 #endif
1796         if (!priv)
1797                 return IRQ_NONE;
1798
1799         spin_lock(&priv->lock);
1800
1801         /* Disable (but don't clear!) interrupts here to avoid
1802          *    back-to-back ISRs and sporadic interrupts from our NIC.
1803          * If we have something to service, the tasklet will re-enable ints.
1804          * If we *don't* have something, we'll re-enable before leaving here. */
1805         inta_mask = iwl_read32(priv, CSR_INT_MASK);  /* just for debug */
1806         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
1807
1808         /* Discover which interrupts are active/pending */
1809         inta = iwl_read32(priv, CSR_INT);
1810
1811         /* Ignore interrupt if there's nothing in NIC to service.
1812          * This may be due to IRQ shared with another device,
1813          * or due to sporadic interrupts thrown from our NIC. */
1814         if (!inta) {
1815                 IWL_DEBUG_ISR(priv, "Ignore interrupt, inta == 0\n");
1816                 goto none;
1817         }
1818
1819         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
1820                 /* Hardware disappeared. It might have already raised
1821                  * an interrupt */
1822                 IWL_WARN(priv, "HARDWARE GONE?? INTA == 0x%08x\n", inta);
1823                 goto unplugged;
1824         }
1825
1826 #ifdef CONFIG_IWLWIFI_DEBUG
1827         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1828                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1829                 IWL_DEBUG_ISR(priv, "ISR inta 0x%08x, enabled 0x%08x, "
1830                               "fh 0x%08x\n", inta, inta_mask, inta_fh);
1831         }
1832 #endif
1833
1834         priv->inta |= inta;
1835         /* iwl_irq_tasklet() will service interrupts and re-enable them */
1836         if (likely(inta))
1837                 tasklet_schedule(&priv->irq_tasklet);
1838         else if (test_bit(STATUS_INT_ENABLED, &priv->status) && !priv->inta)
1839                 iwl_enable_interrupts(priv);
1840
1841  unplugged:
1842         spin_unlock(&priv->lock);
1843         return IRQ_HANDLED;
1844
1845  none:
1846         /* re-enable interrupts here since we don't have anything to service. */
1847         /* only Re-enable if diabled by irq  and no schedules tasklet. */
1848         if (test_bit(STATUS_INT_ENABLED, &priv->status) && !priv->inta)
1849                 iwl_enable_interrupts(priv);
1850
1851         spin_unlock(&priv->lock);
1852         return IRQ_NONE;
1853 }
1854
1855 irqreturn_t iwl_isr_legacy(int irq, void *data)
1856 {
1857         struct iwl_priv *priv = data;
1858         u32 inta, inta_mask;
1859         u32 inta_fh;
1860         if (!priv)
1861                 return IRQ_NONE;
1862
1863         spin_lock(&priv->lock);
1864
1865         /* Disable (but don't clear!) interrupts here to avoid
1866          *    back-to-back ISRs and sporadic interrupts from our NIC.
1867          * If we have something to service, the tasklet will re-enable ints.
1868          * If we *don't* have something, we'll re-enable before leaving here. */
1869         inta_mask = iwl_read32(priv, CSR_INT_MASK);  /* just for debug */
1870         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
1871
1872         /* Discover which interrupts are active/pending */
1873         inta = iwl_read32(priv, CSR_INT);
1874         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1875
1876         /* Ignore interrupt if there's nothing in NIC to service.
1877          * This may be due to IRQ shared with another device,
1878          * or due to sporadic interrupts thrown from our NIC. */
1879         if (!inta && !inta_fh) {
1880                 IWL_DEBUG_ISR(priv, "Ignore interrupt, inta == 0, inta_fh == 0\n");
1881                 goto none;
1882         }
1883
1884         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
1885                 /* Hardware disappeared. It might have already raised
1886                  * an interrupt */
1887                 IWL_WARN(priv, "HARDWARE GONE?? INTA == 0x%08x\n", inta);
1888                 goto unplugged;
1889         }
1890
1891         IWL_DEBUG_ISR(priv, "ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1892                       inta, inta_mask, inta_fh);
1893
1894         inta &= ~CSR_INT_BIT_SCD;
1895
1896         /* iwl_irq_tasklet() will service interrupts and re-enable them */
1897         if (likely(inta || inta_fh))
1898                 tasklet_schedule(&priv->irq_tasklet);
1899
1900  unplugged:
1901         spin_unlock(&priv->lock);
1902         return IRQ_HANDLED;
1903
1904  none:
1905         /* re-enable interrupts here since we don't have anything to service. */
1906         /* only Re-enable if diabled by irq */
1907         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1908                 iwl_enable_interrupts(priv);
1909         spin_unlock(&priv->lock);
1910         return IRQ_NONE;
1911 }
1912 EXPORT_SYMBOL(iwl_isr_legacy);
1913
1914 int iwl_send_bt_config(struct iwl_priv *priv)
1915 {
1916         struct iwl_bt_cmd bt_cmd = {
1917                 .flags = 3,
1918                 .lead_time = 0xAA,
1919                 .max_kill = 1,
1920                 .kill_ack_mask = 0,
1921                 .kill_cts_mask = 0,
1922         };
1923
1924         return iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG,
1925                                 sizeof(struct iwl_bt_cmd), &bt_cmd);
1926 }
1927 EXPORT_SYMBOL(iwl_send_bt_config);
1928
1929 int iwl_send_statistics_request(struct iwl_priv *priv, u8 flags)
1930 {
1931         u32 stat_flags = 0;
1932         struct iwl_host_cmd cmd = {
1933                 .id = REPLY_STATISTICS_CMD,
1934                 .flags = flags,
1935                 .len = sizeof(stat_flags),
1936                 .data = (u8 *) &stat_flags,
1937         };
1938         return iwl_send_cmd(priv, &cmd);
1939 }
1940 EXPORT_SYMBOL(iwl_send_statistics_request);
1941
1942 /**
1943  * iwl_verify_inst_sparse - verify runtime uCode image in card vs. host,
1944  *   using sample data 100 bytes apart.  If these sample points are good,
1945  *   it's a pretty good bet that everything between them is good, too.
1946  */
1947 static int iwlcore_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
1948 {
1949         u32 val;
1950         int ret = 0;
1951         u32 errcnt = 0;
1952         u32 i;
1953
1954         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
1955
1956         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
1957                 /* read data comes through single port, auto-incr addr */
1958                 /* NOTE: Use the debugless read so we don't flood kernel log
1959                  * if IWL_DL_IO is set */
1960                 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
1961                         i + IWL49_RTC_INST_LOWER_BOUND);
1962                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1963                 if (val != le32_to_cpu(*image)) {
1964                         ret = -EIO;
1965                         errcnt++;
1966                         if (errcnt >= 3)
1967                                 break;
1968                 }
1969         }
1970
1971         return ret;
1972 }
1973
1974 /**
1975  * iwlcore_verify_inst_full - verify runtime uCode image in card vs. host,
1976  *     looking at all data.
1977  */
1978 static int iwl_verify_inst_full(struct iwl_priv *priv, __le32 *image,
1979                                  u32 len)
1980 {
1981         u32 val;
1982         u32 save_len = len;
1983         int ret = 0;
1984         u32 errcnt;
1985
1986         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
1987
1988         iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
1989                            IWL49_RTC_INST_LOWER_BOUND);
1990
1991         errcnt = 0;
1992         for (; len > 0; len -= sizeof(u32), image++) {
1993                 /* read data comes through single port, auto-incr addr */
1994                 /* NOTE: Use the debugless read so we don't flood kernel log
1995                  * if IWL_DL_IO is set */
1996                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1997                 if (val != le32_to_cpu(*image)) {
1998                         IWL_ERR(priv, "uCode INST section is invalid at "
1999                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
2000                                   save_len - len, val, le32_to_cpu(*image));
2001                         ret = -EIO;
2002                         errcnt++;
2003                         if (errcnt >= 20)
2004                                 break;
2005                 }
2006         }
2007
2008         if (!errcnt)
2009                 IWL_DEBUG_INFO(priv,
2010                     "ucode image in INSTRUCTION memory is good\n");
2011
2012         return ret;
2013 }
2014
2015 /**
2016  * iwl_verify_ucode - determine which instruction image is in SRAM,
2017  *    and verify its contents
2018  */
2019 int iwl_verify_ucode(struct iwl_priv *priv)
2020 {
2021         __le32 *image;
2022         u32 len;
2023         int ret;
2024
2025         /* Try bootstrap */
2026         image = (__le32 *)priv->ucode_boot.v_addr;
2027         len = priv->ucode_boot.len;
2028         ret = iwlcore_verify_inst_sparse(priv, image, len);
2029         if (!ret) {
2030                 IWL_DEBUG_INFO(priv, "Bootstrap uCode is good in inst SRAM\n");
2031                 return 0;
2032         }
2033
2034         /* Try initialize */
2035         image = (__le32 *)priv->ucode_init.v_addr;
2036         len = priv->ucode_init.len;
2037         ret = iwlcore_verify_inst_sparse(priv, image, len);
2038         if (!ret) {
2039                 IWL_DEBUG_INFO(priv, "Initialize uCode is good in inst SRAM\n");
2040                 return 0;
2041         }
2042
2043         /* Try runtime/protocol */
2044         image = (__le32 *)priv->ucode_code.v_addr;
2045         len = priv->ucode_code.len;
2046         ret = iwlcore_verify_inst_sparse(priv, image, len);
2047         if (!ret) {
2048                 IWL_DEBUG_INFO(priv, "Runtime uCode is good in inst SRAM\n");
2049                 return 0;
2050         }
2051
2052         IWL_ERR(priv, "NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
2053
2054         /* Since nothing seems to match, show first several data entries in
2055          * instruction SRAM, so maybe visual inspection will give a clue.
2056          * Selection of bootstrap image (vs. other images) is arbitrary. */
2057         image = (__le32 *)priv->ucode_boot.v_addr;
2058         len = priv->ucode_boot.len;
2059         ret = iwl_verify_inst_full(priv, image, len);
2060
2061         return ret;
2062 }
2063 EXPORT_SYMBOL(iwl_verify_ucode);
2064
2065
2066 void iwl_rf_kill_ct_config(struct iwl_priv *priv)
2067 {
2068         struct iwl_ct_kill_config cmd;
2069         struct iwl_ct_kill_throttling_config adv_cmd;
2070         unsigned long flags;
2071         int ret = 0;
2072
2073         spin_lock_irqsave(&priv->lock, flags);
2074         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
2075                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
2076         spin_unlock_irqrestore(&priv->lock, flags);
2077         priv->thermal_throttle.ct_kill_toggle = false;
2078
2079         switch (priv->hw_rev & CSR_HW_REV_TYPE_MSK) {
2080         case CSR_HW_REV_TYPE_1000:
2081         case CSR_HW_REV_TYPE_6x00:
2082         case CSR_HW_REV_TYPE_6x50:
2083                 adv_cmd.critical_temperature_enter =
2084                         cpu_to_le32(priv->hw_params.ct_kill_threshold);
2085                 adv_cmd.critical_temperature_exit =
2086                         cpu_to_le32(priv->hw_params.ct_kill_exit_threshold);
2087
2088                 ret = iwl_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD,
2089                                        sizeof(adv_cmd), &adv_cmd);
2090                 if (ret)
2091                         IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
2092                 else
2093                         IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
2094                                         "succeeded, "
2095                                         "critical temperature enter is %d,"
2096                                         "exit is %d\n",
2097                                        priv->hw_params.ct_kill_threshold,
2098                                        priv->hw_params.ct_kill_exit_threshold);
2099                 break;
2100         default:
2101                 cmd.critical_temperature_R =
2102                         cpu_to_le32(priv->hw_params.ct_kill_threshold);
2103
2104                 ret = iwl_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD,
2105                                        sizeof(cmd), &cmd);
2106                 if (ret)
2107                         IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
2108                 else
2109                         IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
2110                                         "succeeded, "
2111                                         "critical temperature is %d\n",
2112                                         priv->hw_params.ct_kill_threshold);
2113                 break;
2114         }
2115 }
2116 EXPORT_SYMBOL(iwl_rf_kill_ct_config);
2117
2118
2119 /*
2120  * CARD_STATE_CMD
2121  *
2122  * Use: Sets the device's internal card state to enable, disable, or halt
2123  *
2124  * When in the 'enable' state the card operates as normal.
2125  * When in the 'disable' state, the card enters into a low power mode.
2126  * When in the 'halt' state, the card is shut down and must be fully
2127  * restarted to come back on.
2128  */
2129 int iwl_send_card_state(struct iwl_priv *priv, u32 flags, u8 meta_flag)
2130 {
2131         struct iwl_host_cmd cmd = {
2132                 .id = REPLY_CARD_STATE_CMD,
2133                 .len = sizeof(u32),
2134                 .data = &flags,
2135                 .flags = meta_flag,
2136         };
2137
2138         return iwl_send_cmd(priv, &cmd);
2139 }
2140
2141 void iwl_rx_pm_sleep_notif(struct iwl_priv *priv,
2142                            struct iwl_rx_mem_buffer *rxb)
2143 {
2144 #ifdef CONFIG_IWLWIFI_DEBUG
2145         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2146         struct iwl_sleep_notification *sleep = &(pkt->u.sleep_notif);
2147         IWL_DEBUG_RX(priv, "sleep mode: %d, src: %d\n",
2148                      sleep->pm_sleep_mode, sleep->pm_wakeup_src);
2149 #endif
2150 }
2151 EXPORT_SYMBOL(iwl_rx_pm_sleep_notif);
2152
2153 void iwl_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
2154                                       struct iwl_rx_mem_buffer *rxb)
2155 {
2156         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2157         u32 len = le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
2158         IWL_DEBUG_RADIO(priv, "Dumping %d bytes of unhandled "
2159                         "notification for %s:\n", len,
2160                         get_cmd_string(pkt->hdr.cmd));
2161         iwl_print_hex_dump(priv, IWL_DL_RADIO, pkt->u.raw, len);
2162 }
2163 EXPORT_SYMBOL(iwl_rx_pm_debug_statistics_notif);
2164
2165 void iwl_rx_reply_error(struct iwl_priv *priv,
2166                         struct iwl_rx_mem_buffer *rxb)
2167 {
2168         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2169
2170         IWL_ERR(priv, "Error Reply type 0x%08X cmd %s (0x%02X) "
2171                 "seq 0x%04X ser 0x%08X\n",
2172                 le32_to_cpu(pkt->u.err_resp.error_type),
2173                 get_cmd_string(pkt->u.err_resp.cmd_id),
2174                 pkt->u.err_resp.cmd_id,
2175                 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
2176                 le32_to_cpu(pkt->u.err_resp.error_info));
2177 }
2178 EXPORT_SYMBOL(iwl_rx_reply_error);
2179
2180 void iwl_clear_isr_stats(struct iwl_priv *priv)
2181 {
2182         memset(&priv->isr_stats, 0, sizeof(priv->isr_stats));
2183 }
2184
2185 int iwl_mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
2186                            const struct ieee80211_tx_queue_params *params)
2187 {
2188         struct iwl_priv *priv = hw->priv;
2189         unsigned long flags;
2190         int q;
2191
2192         IWL_DEBUG_MAC80211(priv, "enter\n");
2193
2194         if (!iwl_is_ready_rf(priv)) {
2195                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
2196                 return -EIO;
2197         }
2198
2199         if (queue >= AC_NUM) {
2200                 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
2201                 return 0;
2202         }
2203
2204         q = AC_NUM - 1 - queue;
2205
2206         spin_lock_irqsave(&priv->lock, flags);
2207
2208         priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
2209         priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
2210         priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
2211         priv->qos_data.def_qos_parm.ac[q].edca_txop =
2212                         cpu_to_le16((params->txop * 32));
2213
2214         priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
2215         priv->qos_data.qos_active = 1;
2216
2217         if (priv->iw_mode == NL80211_IFTYPE_AP)
2218                 iwl_activate_qos(priv, 1);
2219         else if (priv->assoc_id && iwl_is_associated(priv))
2220                 iwl_activate_qos(priv, 0);
2221
2222         spin_unlock_irqrestore(&priv->lock, flags);
2223
2224         IWL_DEBUG_MAC80211(priv, "leave\n");
2225         return 0;
2226 }
2227 EXPORT_SYMBOL(iwl_mac_conf_tx);
2228
2229 static void iwl_ht_conf(struct iwl_priv *priv,
2230                             struct ieee80211_bss_conf *bss_conf)
2231 {
2232         struct ieee80211_sta_ht_cap *ht_conf;
2233         struct iwl_ht_info *iwl_conf = &priv->current_ht_config;
2234         struct ieee80211_sta *sta;
2235
2236         IWL_DEBUG_MAC80211(priv, "enter: \n");
2237
2238         if (!iwl_conf->is_ht)
2239                 return;
2240
2241
2242         /*
2243          * It is totally wrong to base global information on something
2244          * that is valid only when associated, alas, this driver works
2245          * that way and I don't know how to fix it.
2246          */
2247
2248         rcu_read_lock();
2249         sta = ieee80211_find_sta(priv->hw, priv->bssid);
2250         if (!sta) {
2251                 rcu_read_unlock();
2252                 return;
2253         }
2254         ht_conf = &sta->ht_cap;
2255
2256         iwl_conf->sm_ps = (u8)((ht_conf->cap & IEEE80211_HT_CAP_SM_PS) >> 2);
2257
2258         memcpy(&iwl_conf->mcs, &ht_conf->mcs, 16);
2259
2260         iwl_conf->ht_protection =
2261                 bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_PROTECTION;
2262         iwl_conf->non_GF_STA_present =
2263                 !!(bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
2264
2265         rcu_read_unlock();
2266
2267         IWL_DEBUG_MAC80211(priv, "leave\n");
2268 }
2269
2270 #define IWL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6)
2271 void iwl_bss_info_changed(struct ieee80211_hw *hw,
2272                           struct ieee80211_vif *vif,
2273                           struct ieee80211_bss_conf *bss_conf,
2274                           u32 changes)
2275 {
2276         struct iwl_priv *priv = hw->priv;
2277         int ret;
2278
2279         IWL_DEBUG_MAC80211(priv, "changes = 0x%X\n", changes);
2280
2281         if (!iwl_is_alive(priv))
2282                 return;
2283
2284         mutex_lock(&priv->mutex);
2285
2286         if (changes & BSS_CHANGED_BEACON &&
2287             priv->iw_mode == NL80211_IFTYPE_AP) {
2288                 dev_kfree_skb(priv->ibss_beacon);
2289                 priv->ibss_beacon = ieee80211_beacon_get(hw, vif);
2290         }
2291
2292         if (changes & BSS_CHANGED_BEACON_INT) {
2293                 priv->beacon_int = bss_conf->beacon_int;
2294                 /* TODO: in AP mode, do something to make this take effect */
2295         }
2296
2297         if (changes & BSS_CHANGED_BSSID) {
2298                 IWL_DEBUG_MAC80211(priv, "BSSID %pM\n", bss_conf->bssid);
2299
2300                 /*
2301                  * If there is currently a HW scan going on in the
2302                  * background then we need to cancel it else the RXON
2303                  * below/in post_associate will fail.
2304                  */
2305                 if (iwl_scan_cancel_timeout(priv, 100)) {
2306                         IWL_WARN(priv, "Aborted scan still in progress after 100ms\n");
2307                         IWL_DEBUG_MAC80211(priv, "leaving - scan abort failed.\n");
2308                         mutex_unlock(&priv->mutex);
2309                         return;
2310                 }
2311
2312                 /* mac80211 only sets assoc when in STATION mode */
2313                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC ||
2314                     bss_conf->assoc) {
2315                         memcpy(priv->staging_rxon.bssid_addr,
2316                                bss_conf->bssid, ETH_ALEN);
2317
2318                         /* currently needed in a few places */
2319                         memcpy(priv->bssid, bss_conf->bssid, ETH_ALEN);
2320                 } else {
2321                         priv->staging_rxon.filter_flags &=
2322                                 ~RXON_FILTER_ASSOC_MSK;
2323                 }
2324
2325         }
2326
2327         /*
2328          * This needs to be after setting the BSSID in case
2329          * mac80211 decides to do both changes at once because
2330          * it will invoke post_associate.
2331          */
2332         if (priv->iw_mode == NL80211_IFTYPE_ADHOC &&
2333             changes & BSS_CHANGED_BEACON) {
2334                 struct sk_buff *beacon = ieee80211_beacon_get(hw, vif);
2335
2336                 if (beacon)
2337                         iwl_mac_beacon_update(hw, beacon);
2338         }
2339
2340         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
2341                 IWL_DEBUG_MAC80211(priv, "ERP_PREAMBLE %d\n",
2342                                    bss_conf->use_short_preamble);
2343                 if (bss_conf->use_short_preamble)
2344                         priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2345                 else
2346                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2347         }
2348
2349         if (changes & BSS_CHANGED_ERP_CTS_PROT) {
2350                 IWL_DEBUG_MAC80211(priv, "ERP_CTS %d\n", bss_conf->use_cts_prot);
2351                 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
2352                         priv->staging_rxon.flags |= RXON_FLG_TGG_PROTECT_MSK;
2353                 else
2354                         priv->staging_rxon.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
2355         }
2356
2357         if (changes & BSS_CHANGED_BASIC_RATES) {
2358                 /* XXX use this information
2359                  *
2360                  * To do that, remove code from iwl_set_rate() and put something
2361                  * like this here:
2362                  *
2363                 if (A-band)
2364                         priv->staging_rxon.ofdm_basic_rates =
2365                                 bss_conf->basic_rates;
2366                 else
2367                         priv->staging_rxon.ofdm_basic_rates =
2368                                 bss_conf->basic_rates >> 4;
2369                         priv->staging_rxon.cck_basic_rates =
2370                                 bss_conf->basic_rates & 0xF;
2371                  */
2372         }
2373
2374         if (changes & BSS_CHANGED_HT) {
2375                 iwl_ht_conf(priv, bss_conf);
2376
2377                 if (priv->cfg->ops->hcmd->set_rxon_chain)
2378                         priv->cfg->ops->hcmd->set_rxon_chain(priv);
2379         }
2380
2381         if (changes & BSS_CHANGED_ASSOC) {
2382                 IWL_DEBUG_MAC80211(priv, "ASSOC %d\n", bss_conf->assoc);
2383                 if (bss_conf->assoc) {
2384                         priv->assoc_id = bss_conf->aid;
2385                         priv->beacon_int = bss_conf->beacon_int;
2386                         priv->timestamp = bss_conf->timestamp;
2387                         priv->assoc_capability = bss_conf->assoc_capability;
2388
2389                         /*
2390                          * We have just associated, don't start scan too early
2391                          * leave time for EAPOL exchange to complete.
2392                          *
2393                          * XXX: do this in mac80211
2394                          */
2395                         priv->next_scan_jiffies = jiffies +
2396                                         IWL_DELAY_NEXT_SCAN_AFTER_ASSOC;
2397                         if (!iwl_is_rfkill(priv))
2398                                 priv->cfg->ops->lib->post_associate(priv);
2399                 } else
2400                         priv->assoc_id = 0;
2401
2402         }
2403
2404         if (changes && iwl_is_associated(priv) && priv->assoc_id) {
2405                 IWL_DEBUG_MAC80211(priv, "Changes (%#x) while associated\n",
2406                                    changes);
2407                 ret = iwl_send_rxon_assoc(priv);
2408                 if (!ret) {
2409                         /* Sync active_rxon with latest change. */
2410                         memcpy((void *)&priv->active_rxon,
2411                                 &priv->staging_rxon,
2412                                 sizeof(struct iwl_rxon_cmd));
2413                 }
2414         }
2415
2416         mutex_unlock(&priv->mutex);
2417
2418         IWL_DEBUG_MAC80211(priv, "leave\n");
2419 }
2420 EXPORT_SYMBOL(iwl_bss_info_changed);
2421
2422 int iwl_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb)
2423 {
2424         struct iwl_priv *priv = hw->priv;
2425         unsigned long flags;
2426         __le64 timestamp;
2427
2428         IWL_DEBUG_MAC80211(priv, "enter\n");
2429
2430         if (!iwl_is_ready_rf(priv)) {
2431                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
2432                 return -EIO;
2433         }
2434
2435         if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
2436                 IWL_DEBUG_MAC80211(priv, "leave - not IBSS\n");
2437                 return -EIO;
2438         }
2439
2440         spin_lock_irqsave(&priv->lock, flags);
2441
2442         if (priv->ibss_beacon)
2443                 dev_kfree_skb(priv->ibss_beacon);
2444
2445         priv->ibss_beacon = skb;
2446
2447         priv->assoc_id = 0;
2448         timestamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
2449         priv->timestamp = le64_to_cpu(timestamp);
2450
2451         IWL_DEBUG_MAC80211(priv, "leave\n");
2452         spin_unlock_irqrestore(&priv->lock, flags);
2453
2454         iwl_reset_qos(priv);
2455
2456         priv->cfg->ops->lib->post_associate(priv);
2457
2458
2459         return 0;
2460 }
2461 EXPORT_SYMBOL(iwl_mac_beacon_update);
2462
2463 int iwl_set_mode(struct iwl_priv *priv, int mode)
2464 {
2465         if (mode == NL80211_IFTYPE_ADHOC) {
2466                 const struct iwl_channel_info *ch_info;
2467
2468                 ch_info = iwl_get_channel_info(priv,
2469                         priv->band,
2470                         le16_to_cpu(priv->staging_rxon.channel));
2471
2472                 if (!ch_info || !is_channel_ibss(ch_info)) {
2473                         IWL_ERR(priv, "channel %d not IBSS channel\n",
2474                                   le16_to_cpu(priv->staging_rxon.channel));
2475                         return -EINVAL;
2476                 }
2477         }
2478
2479         iwl_connection_init_rx_config(priv, mode);
2480
2481         if (priv->cfg->ops->hcmd->set_rxon_chain)
2482                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
2483
2484         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2485
2486         iwl_clear_stations_table(priv);
2487
2488         /* dont commit rxon if rf-kill is on*/
2489         if (!iwl_is_ready_rf(priv))
2490                 return -EAGAIN;
2491
2492         iwlcore_commit_rxon(priv);
2493
2494         return 0;
2495 }
2496 EXPORT_SYMBOL(iwl_set_mode);
2497
2498 int iwl_mac_add_interface(struct ieee80211_hw *hw,
2499                                  struct ieee80211_if_init_conf *conf)
2500 {
2501         struct iwl_priv *priv = hw->priv;
2502         unsigned long flags;
2503
2504         IWL_DEBUG_MAC80211(priv, "enter: type %d\n", conf->type);
2505
2506         if (priv->vif) {
2507                 IWL_DEBUG_MAC80211(priv, "leave - vif != NULL\n");
2508                 return -EOPNOTSUPP;
2509         }
2510
2511         spin_lock_irqsave(&priv->lock, flags);
2512         priv->vif = conf->vif;
2513         priv->iw_mode = conf->type;
2514
2515         spin_unlock_irqrestore(&priv->lock, flags);
2516
2517         mutex_lock(&priv->mutex);
2518
2519         if (conf->mac_addr) {
2520                 IWL_DEBUG_MAC80211(priv, "Set %pM\n", conf->mac_addr);
2521                 memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
2522         }
2523
2524         if (iwl_set_mode(priv, conf->type) == -EAGAIN)
2525                 /* we are not ready, will run again when ready */
2526                 set_bit(STATUS_MODE_PENDING, &priv->status);
2527
2528         mutex_unlock(&priv->mutex);
2529
2530         IWL_DEBUG_MAC80211(priv, "leave\n");
2531         return 0;
2532 }
2533 EXPORT_SYMBOL(iwl_mac_add_interface);
2534
2535 void iwl_mac_remove_interface(struct ieee80211_hw *hw,
2536                                      struct ieee80211_if_init_conf *conf)
2537 {
2538         struct iwl_priv *priv = hw->priv;
2539
2540         IWL_DEBUG_MAC80211(priv, "enter\n");
2541
2542         mutex_lock(&priv->mutex);
2543
2544         if (iwl_is_ready_rf(priv)) {
2545                 iwl_scan_cancel_timeout(priv, 100);
2546                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2547                 iwlcore_commit_rxon(priv);
2548         }
2549         if (priv->vif == conf->vif) {
2550                 priv->vif = NULL;
2551                 memset(priv->bssid, 0, ETH_ALEN);
2552         }
2553         mutex_unlock(&priv->mutex);
2554
2555         IWL_DEBUG_MAC80211(priv, "leave\n");
2556
2557 }
2558 EXPORT_SYMBOL(iwl_mac_remove_interface);
2559
2560 /**
2561  * iwl_mac_config - mac80211 config callback
2562  *
2563  * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
2564  * be set inappropriately and the driver currently sets the hardware up to
2565  * use it whenever needed.
2566  */
2567 int iwl_mac_config(struct ieee80211_hw *hw, u32 changed)
2568 {
2569         struct iwl_priv *priv = hw->priv;
2570         const struct iwl_channel_info *ch_info;
2571         struct ieee80211_conf *conf = &hw->conf;
2572         struct iwl_ht_info *ht_conf = &priv->current_ht_config;
2573         unsigned long flags = 0;
2574         int ret = 0;
2575         u16 ch;
2576         int scan_active = 0;
2577
2578         mutex_lock(&priv->mutex);
2579
2580         IWL_DEBUG_MAC80211(priv, "enter to channel %d changed 0x%X\n",
2581                                         conf->channel->hw_value, changed);
2582
2583         if (unlikely(!priv->cfg->mod_params->disable_hw_scan &&
2584                         test_bit(STATUS_SCANNING, &priv->status))) {
2585                 scan_active = 1;
2586                 IWL_DEBUG_MAC80211(priv, "leave - scanning\n");
2587         }
2588
2589
2590         /* during scanning mac80211 will delay channel setting until
2591          * scan finish with changed = 0
2592          */
2593         if (!changed || (changed & IEEE80211_CONF_CHANGE_CHANNEL)) {
2594                 if (scan_active)
2595                         goto set_ch_out;
2596
2597                 ch = ieee80211_frequency_to_channel(conf->channel->center_freq);
2598                 ch_info = iwl_get_channel_info(priv, conf->channel->band, ch);
2599                 if (!is_channel_valid(ch_info)) {
2600                         IWL_DEBUG_MAC80211(priv, "leave - invalid channel\n");
2601                         ret = -EINVAL;
2602                         goto set_ch_out;
2603                 }
2604
2605                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC &&
2606                         !is_channel_ibss(ch_info)) {
2607                         IWL_ERR(priv, "channel %d in band %d not "
2608                                 "IBSS channel\n",
2609                                 conf->channel->hw_value, conf->channel->band);
2610                         ret = -EINVAL;
2611                         goto set_ch_out;
2612                 }
2613
2614                 spin_lock_irqsave(&priv->lock, flags);
2615
2616                 /* Configure HT40 channels */
2617                 ht_conf->is_ht = conf_is_ht(conf);
2618                 if (ht_conf->is_ht) {
2619                         if (conf_is_ht40_minus(conf)) {
2620                                 ht_conf->extension_chan_offset =
2621                                         IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2622                                 ht_conf->supported_chan_width =
2623                                         IWL_CHANNEL_WIDTH_40MHZ;
2624                         } else if (conf_is_ht40_plus(conf)) {
2625                                 ht_conf->extension_chan_offset =
2626                                         IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2627                                 ht_conf->supported_chan_width =
2628                                         IWL_CHANNEL_WIDTH_40MHZ;
2629                         } else {
2630                                 ht_conf->extension_chan_offset =
2631                                         IEEE80211_HT_PARAM_CHA_SEC_NONE;
2632                                 ht_conf->supported_chan_width =
2633                                         IWL_CHANNEL_WIDTH_20MHZ;
2634                         }
2635                 } else
2636                         ht_conf->supported_chan_width = IWL_CHANNEL_WIDTH_20MHZ;
2637                 /* Default to no protection. Protection mode will later be set
2638                  * from BSS config in iwl_ht_conf */
2639                 ht_conf->ht_protection = IEEE80211_HT_OP_MODE_PROTECTION_NONE;
2640
2641                 /* if we are switching from ht to 2.4 clear flags
2642                  * from any ht related info since 2.4 does not
2643                  * support ht */
2644                 if ((le16_to_cpu(priv->staging_rxon.channel) != ch))
2645                         priv->staging_rxon.flags = 0;
2646
2647                 iwl_set_rxon_channel(priv, conf->channel);
2648
2649                 iwl_set_flags_for_band(priv, conf->channel->band);
2650                 spin_unlock_irqrestore(&priv->lock, flags);
2651  set_ch_out:
2652                 /* The list of supported rates and rate mask can be different
2653                  * for each band; since the band may have changed, reset
2654                  * the rate mask to what mac80211 lists */
2655                 iwl_set_rate(priv);
2656         }
2657
2658         if (changed & IEEE80211_CONF_CHANGE_PS) {
2659                 ret = iwl_power_update_mode(priv, false);
2660                 if (ret)
2661                         IWL_DEBUG_MAC80211(priv, "Error setting sleep level\n");
2662         }
2663
2664         if (changed & IEEE80211_CONF_CHANGE_POWER) {
2665                 IWL_DEBUG_MAC80211(priv, "TX Power old=%d new=%d\n",
2666                         priv->tx_power_user_lmt, conf->power_level);
2667
2668                 iwl_set_tx_power(priv, conf->power_level, false);
2669         }
2670
2671         /* call to ensure that 4965 rx_chain is set properly in monitor mode */
2672         if (priv->cfg->ops->hcmd->set_rxon_chain)
2673                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
2674
2675         if (!iwl_is_ready(priv)) {
2676                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2677                 goto out;
2678         }
2679
2680         if (scan_active)
2681                 goto out;
2682
2683         if (memcmp(&priv->active_rxon,
2684                    &priv->staging_rxon, sizeof(priv->staging_rxon)))
2685                 iwlcore_commit_rxon(priv);
2686         else
2687                 IWL_DEBUG_INFO(priv, "Not re-sending same RXON configuration.\n");
2688
2689
2690 out:
2691         IWL_DEBUG_MAC80211(priv, "leave\n");
2692         mutex_unlock(&priv->mutex);
2693         return ret;
2694 }
2695 EXPORT_SYMBOL(iwl_mac_config);
2696
2697 int iwl_mac_get_tx_stats(struct ieee80211_hw *hw,
2698                          struct ieee80211_tx_queue_stats *stats)
2699 {
2700         struct iwl_priv *priv = hw->priv;
2701         int i, avail;
2702         struct iwl_tx_queue *txq;
2703         struct iwl_queue *q;
2704         unsigned long flags;
2705
2706         IWL_DEBUG_MAC80211(priv, "enter\n");
2707
2708         if (!iwl_is_ready_rf(priv)) {
2709                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
2710                 return -EIO;
2711         }
2712
2713         spin_lock_irqsave(&priv->lock, flags);
2714
2715         for (i = 0; i < AC_NUM; i++) {
2716                 txq = &priv->txq[i];
2717                 q = &txq->q;
2718                 avail = iwl_queue_space(q);
2719
2720                 stats[i].len = q->n_window - avail;
2721                 stats[i].limit = q->n_window - q->high_mark;
2722                 stats[i].count = q->n_window;
2723
2724         }
2725         spin_unlock_irqrestore(&priv->lock, flags);
2726
2727         IWL_DEBUG_MAC80211(priv, "leave\n");
2728
2729         return 0;
2730 }
2731 EXPORT_SYMBOL(iwl_mac_get_tx_stats);
2732
2733 void iwl_mac_reset_tsf(struct ieee80211_hw *hw)
2734 {
2735         struct iwl_priv *priv = hw->priv;
2736         unsigned long flags;
2737
2738         mutex_lock(&priv->mutex);
2739         IWL_DEBUG_MAC80211(priv, "enter\n");
2740
2741         spin_lock_irqsave(&priv->lock, flags);
2742         memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_info));
2743         spin_unlock_irqrestore(&priv->lock, flags);
2744
2745         iwl_reset_qos(priv);
2746
2747         spin_lock_irqsave(&priv->lock, flags);
2748         priv->assoc_id = 0;
2749         priv->assoc_capability = 0;
2750         priv->assoc_station_added = 0;
2751
2752         /* new association get rid of ibss beacon skb */
2753         if (priv->ibss_beacon)
2754                 dev_kfree_skb(priv->ibss_beacon);
2755
2756         priv->ibss_beacon = NULL;
2757
2758         priv->beacon_int = priv->vif->bss_conf.beacon_int;
2759         priv->timestamp = 0;
2760         if ((priv->iw_mode == NL80211_IFTYPE_STATION))
2761                 priv->beacon_int = 0;
2762
2763         spin_unlock_irqrestore(&priv->lock, flags);
2764
2765         if (!iwl_is_ready_rf(priv)) {
2766                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2767                 mutex_unlock(&priv->mutex);
2768                 return;
2769         }
2770
2771         /* we are restarting association process
2772          * clear RXON_FILTER_ASSOC_MSK bit
2773          */
2774         if (priv->iw_mode != NL80211_IFTYPE_AP) {
2775                 iwl_scan_cancel_timeout(priv, 100);
2776                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2777                 iwlcore_commit_rxon(priv);
2778         }
2779
2780         if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
2781                 IWL_DEBUG_MAC80211(priv, "leave - not in IBSS\n");
2782                 mutex_unlock(&priv->mutex);
2783                 return;
2784         }
2785
2786         iwl_set_rate(priv);
2787
2788         mutex_unlock(&priv->mutex);
2789
2790         IWL_DEBUG_MAC80211(priv, "leave\n");
2791 }
2792 EXPORT_SYMBOL(iwl_mac_reset_tsf);
2793
2794 #ifdef CONFIG_IWLWIFI_DEBUGFS
2795
2796 #define IWL_TRAFFIC_DUMP_SIZE   (IWL_TRAFFIC_ENTRY_SIZE * IWL_TRAFFIC_ENTRIES)
2797
2798 void iwl_reset_traffic_log(struct iwl_priv *priv)
2799 {
2800         priv->tx_traffic_idx = 0;
2801         priv->rx_traffic_idx = 0;
2802         if (priv->tx_traffic)
2803                 memset(priv->tx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
2804         if (priv->rx_traffic)
2805                 memset(priv->rx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
2806 }
2807
2808 int iwl_alloc_traffic_mem(struct iwl_priv *priv)
2809 {
2810         u32 traffic_size = IWL_TRAFFIC_DUMP_SIZE;
2811
2812         if (iwl_debug_level & IWL_DL_TX) {
2813                 if (!priv->tx_traffic) {
2814                         priv->tx_traffic =
2815                                 kzalloc(traffic_size, GFP_KERNEL);
2816                         if (!priv->tx_traffic)
2817                                 return -ENOMEM;
2818                 }
2819         }
2820         if (iwl_debug_level & IWL_DL_RX) {
2821                 if (!priv->rx_traffic) {
2822                         priv->rx_traffic =
2823                                 kzalloc(traffic_size, GFP_KERNEL);
2824                         if (!priv->rx_traffic)
2825                                 return -ENOMEM;
2826                 }
2827         }
2828         iwl_reset_traffic_log(priv);
2829         return 0;
2830 }
2831 EXPORT_SYMBOL(iwl_alloc_traffic_mem);
2832
2833 void iwl_free_traffic_mem(struct iwl_priv *priv)
2834 {
2835         kfree(priv->tx_traffic);
2836         priv->tx_traffic = NULL;
2837
2838         kfree(priv->rx_traffic);
2839         priv->rx_traffic = NULL;
2840 }
2841 EXPORT_SYMBOL(iwl_free_traffic_mem);
2842
2843 void iwl_dbg_log_tx_data_frame(struct iwl_priv *priv,
2844                       u16 length, struct ieee80211_hdr *header)
2845 {
2846         __le16 fc;
2847         u16 len;
2848
2849         if (likely(!(iwl_debug_level & IWL_DL_TX)))
2850                 return;
2851
2852         if (!priv->tx_traffic)
2853                 return;
2854
2855         fc = header->frame_control;
2856         if (ieee80211_is_data(fc)) {
2857                 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
2858                        ? IWL_TRAFFIC_ENTRY_SIZE : length;
2859                 memcpy((priv->tx_traffic +
2860                        (priv->tx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
2861                        header, len);
2862                 priv->tx_traffic_idx =
2863                         (priv->tx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
2864         }
2865 }
2866 EXPORT_SYMBOL(iwl_dbg_log_tx_data_frame);
2867
2868 void iwl_dbg_log_rx_data_frame(struct iwl_priv *priv,
2869                       u16 length, struct ieee80211_hdr *header)
2870 {
2871         __le16 fc;
2872         u16 len;
2873
2874         if (likely(!(iwl_debug_level & IWL_DL_RX)))
2875                 return;
2876
2877         if (!priv->rx_traffic)
2878                 return;
2879
2880         fc = header->frame_control;
2881         if (ieee80211_is_data(fc)) {
2882                 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
2883                        ? IWL_TRAFFIC_ENTRY_SIZE : length;
2884                 memcpy((priv->rx_traffic +
2885                        (priv->rx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
2886                        header, len);
2887                 priv->rx_traffic_idx =
2888                         (priv->rx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
2889         }
2890 }
2891 EXPORT_SYMBOL(iwl_dbg_log_rx_data_frame);
2892
2893 const char *get_mgmt_string(int cmd)
2894 {
2895         switch (cmd) {
2896                 IWL_CMD(MANAGEMENT_ASSOC_REQ);
2897                 IWL_CMD(MANAGEMENT_ASSOC_RESP);
2898                 IWL_CMD(MANAGEMENT_REASSOC_REQ);
2899                 IWL_CMD(MANAGEMENT_REASSOC_RESP);
2900                 IWL_CMD(MANAGEMENT_PROBE_REQ);
2901                 IWL_CMD(MANAGEMENT_PROBE_RESP);
2902                 IWL_CMD(MANAGEMENT_BEACON);
2903                 IWL_CMD(MANAGEMENT_ATIM);
2904                 IWL_CMD(MANAGEMENT_DISASSOC);
2905                 IWL_CMD(MANAGEMENT_AUTH);
2906                 IWL_CMD(MANAGEMENT_DEAUTH);
2907                 IWL_CMD(MANAGEMENT_ACTION);
2908         default:
2909                 return "UNKNOWN";
2910
2911         }
2912 }
2913
2914 const char *get_ctrl_string(int cmd)
2915 {
2916         switch (cmd) {
2917                 IWL_CMD(CONTROL_BACK_REQ);
2918                 IWL_CMD(CONTROL_BACK);
2919                 IWL_CMD(CONTROL_PSPOLL);
2920                 IWL_CMD(CONTROL_RTS);
2921                 IWL_CMD(CONTROL_CTS);
2922                 IWL_CMD(CONTROL_ACK);
2923                 IWL_CMD(CONTROL_CFEND);
2924                 IWL_CMD(CONTROL_CFENDACK);
2925         default:
2926                 return "UNKNOWN";
2927
2928         }
2929 }
2930
2931 void iwl_clear_tx_stats(struct iwl_priv *priv)
2932 {
2933         memset(&priv->tx_stats, 0, sizeof(struct traffic_stats));
2934
2935 }
2936
2937 void iwl_clear_rx_stats(struct iwl_priv *priv)
2938 {
2939         memset(&priv->rx_stats, 0, sizeof(struct traffic_stats));
2940 }
2941
2942 /*
2943  * if CONFIG_IWLWIFI_DEBUGFS defined, iwl_update_stats function will
2944  * record all the MGMT, CTRL and DATA pkt for both TX and Rx pass.
2945  * Use debugFs to display the rx/rx_statistics
2946  * if CONFIG_IWLWIFI_DEBUGFS not being defined, then no MGMT and CTRL
2947  * information will be recorded, but DATA pkt still will be recorded
2948  * for the reason of iwl_led.c need to control the led blinking based on
2949  * number of tx and rx data.
2950  *
2951  */
2952 void iwl_update_stats(struct iwl_priv *priv, bool is_tx, __le16 fc, u16 len)
2953 {
2954         struct traffic_stats    *stats;
2955
2956         if (is_tx)
2957                 stats = &priv->tx_stats;
2958         else
2959                 stats = &priv->rx_stats;
2960
2961         if (ieee80211_is_mgmt(fc)) {
2962                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
2963                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
2964                         stats->mgmt[MANAGEMENT_ASSOC_REQ]++;
2965                         break;
2966                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP):
2967                         stats->mgmt[MANAGEMENT_ASSOC_RESP]++;
2968                         break;
2969                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
2970                         stats->mgmt[MANAGEMENT_REASSOC_REQ]++;
2971                         break;
2972                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP):
2973                         stats->mgmt[MANAGEMENT_REASSOC_RESP]++;
2974                         break;
2975                 case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ):
2976                         stats->mgmt[MANAGEMENT_PROBE_REQ]++;
2977                         break;
2978                 case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP):
2979                         stats->mgmt[MANAGEMENT_PROBE_RESP]++;
2980                         break;
2981                 case cpu_to_le16(IEEE80211_STYPE_BEACON):
2982                         stats->mgmt[MANAGEMENT_BEACON]++;
2983                         break;
2984                 case cpu_to_le16(IEEE80211_STYPE_ATIM):
2985                         stats->mgmt[MANAGEMENT_ATIM]++;
2986                         break;
2987                 case cpu_to_le16(IEEE80211_STYPE_DISASSOC):
2988                         stats->mgmt[MANAGEMENT_DISASSOC]++;
2989                         break;
2990                 case cpu_to_le16(IEEE80211_STYPE_AUTH):
2991                         stats->mgmt[MANAGEMENT_AUTH]++;
2992                         break;
2993                 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
2994                         stats->mgmt[MANAGEMENT_DEAUTH]++;
2995                         break;
2996                 case cpu_to_le16(IEEE80211_STYPE_ACTION):
2997                         stats->mgmt[MANAGEMENT_ACTION]++;
2998                         break;
2999                 }
3000         } else if (ieee80211_is_ctl(fc)) {
3001                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
3002                 case cpu_to_le16(IEEE80211_STYPE_BACK_REQ):
3003                         stats->ctrl[CONTROL_BACK_REQ]++;
3004                         break;
3005                 case cpu_to_le16(IEEE80211_STYPE_BACK):
3006                         stats->ctrl[CONTROL_BACK]++;
3007                         break;
3008                 case cpu_to_le16(IEEE80211_STYPE_PSPOLL):
3009                         stats->ctrl[CONTROL_PSPOLL]++;
3010                         break;
3011                 case cpu_to_le16(IEEE80211_STYPE_RTS):
3012                         stats->ctrl[CONTROL_RTS]++;
3013                         break;
3014                 case cpu_to_le16(IEEE80211_STYPE_CTS):
3015                         stats->ctrl[CONTROL_CTS]++;
3016                         break;
3017                 case cpu_to_le16(IEEE80211_STYPE_ACK):
3018                         stats->ctrl[CONTROL_ACK]++;
3019                         break;
3020                 case cpu_to_le16(IEEE80211_STYPE_CFEND):
3021                         stats->ctrl[CONTROL_CFEND]++;
3022                         break;
3023                 case cpu_to_le16(IEEE80211_STYPE_CFENDACK):
3024                         stats->ctrl[CONTROL_CFENDACK]++;
3025                         break;
3026                 }
3027         } else {
3028                 /* data */
3029                 stats->data_cnt++;
3030                 stats->data_bytes += len;
3031         }
3032 }
3033 EXPORT_SYMBOL(iwl_update_stats);
3034 #endif
3035
3036 #ifdef CONFIG_PM
3037
3038 int iwl_pci_suspend(struct pci_dev *pdev, pm_message_t state)
3039 {
3040         struct iwl_priv *priv = pci_get_drvdata(pdev);
3041
3042         /*
3043          * This function is called when system goes into suspend state
3044          * mac80211 will call iwl_mac_stop() from the mac80211 suspend function
3045          * first but since iwl_mac_stop() has no knowledge of who the caller is,
3046          * it will not call apm_ops.stop() to stop the DMA operation.
3047          * Calling apm_ops.stop here to make sure we stop the DMA.
3048          */
3049         priv->cfg->ops->lib->apm_ops.stop(priv);
3050
3051         pci_save_state(pdev);
3052         pci_disable_device(pdev);
3053         pci_set_power_state(pdev, PCI_D3hot);
3054
3055         return 0;
3056 }
3057 EXPORT_SYMBOL(iwl_pci_suspend);
3058
3059 int iwl_pci_resume(struct pci_dev *pdev)
3060 {
3061         struct iwl_priv *priv = pci_get_drvdata(pdev);
3062         int ret;
3063
3064         pci_set_power_state(pdev, PCI_D0);
3065         ret = pci_enable_device(pdev);
3066         if (ret)
3067                 return ret;
3068         pci_restore_state(pdev);
3069         iwl_enable_interrupts(priv);
3070
3071         return 0;
3072 }
3073 EXPORT_SYMBOL(iwl_pci_resume);
3074
3075 #endif /* CONFIG_PM */