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 static irqreturn_t iwl_isr(int irq, void *data);
  63
  64 /*
  65  * Parameter order:
  66  *   rate, ht rate, prev rate, next rate, prev tgg rate, next tgg rate
  67  *
  68  * If there isn't a valid next or previous rate then INV is used which
  69  * maps to IWL_RATE_INVALID
  70  *
  71  */
  72 const struct iwl_rate_info iwl_rates[IWL_RATE_COUNT] = {
  73         IWL_DECLARE_RATE_INFO(1, INV, INV, 2, INV, 2, INV, 2),    /*  1mbps */
  74         IWL_DECLARE_RATE_INFO(2, INV, 1, 5, 1, 5, 1, 5),          /*  2mbps */
  75         IWL_DECLARE_RATE_INFO(5, INV, 2, 6, 2, 11, 2, 11),        /*5.5mbps */
  76         IWL_DECLARE_RATE_INFO(11, INV, 9, 12, 9, 12, 5, 18),      /* 11mbps */
  77         IWL_DECLARE_RATE_INFO(6, 6, 5, 9, 5, 11, 5, 11),        /*  6mbps */
  78         IWL_DECLARE_RATE_INFO(9, 6, 6, 11, 6, 11, 5, 11),       /*  9mbps */
  79         IWL_DECLARE_RATE_INFO(12, 12, 11, 18, 11, 18, 11, 18),   /* 12mbps */
  80         IWL_DECLARE_RATE_INFO(18, 18, 12, 24, 12, 24, 11, 24),   /* 18mbps */
  81         IWL_DECLARE_RATE_INFO(24, 24, 18, 36, 18, 36, 18, 36),   /* 24mbps */
  82         IWL_DECLARE_RATE_INFO(36, 36, 24, 48, 24, 48, 24, 48),   /* 36mbps */
  83         IWL_DECLARE_RATE_INFO(48, 48, 36, 54, 36, 54, 36, 54),   /* 48mbps */
  84         IWL_DECLARE_RATE_INFO(54, 54, 48, INV, 48, INV, 48, INV),/* 54mbps */
  85         IWL_DECLARE_RATE_INFO(60, 60, 48, INV, 48, INV, 48, INV),/* 60mbps */
  86         /* FIXME:RS:          ^^    should be INV (legacy) */
  87 };
  88 EXPORT_SYMBOL(iwl_rates);
  89
  90 /**
  91  * translate ucode response to mac80211 tx status control values
  92  */
  93 void iwl_hwrate_to_tx_control(struct iwl_priv *priv, u32 rate_n_flags,
  94                                   struct ieee80211_tx_info *info)
  95 {
  96         int rate_index;
  97         struct ieee80211_tx_rate *r = &info->control.rates[0];
  98
  99         info->antenna_sel_tx =
 100                 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
 101         if (rate_n_flags & RATE_MCS_HT_MSK)
 102                 r->flags |= IEEE80211_TX_RC_MCS;
 103         if (rate_n_flags & RATE_MCS_GF_MSK)
 104                 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
 105         if (rate_n_flags & RATE_MCS_FAT_MSK)
 106                 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
 107         if (rate_n_flags & RATE_MCS_DUP_MSK)
 108                 r->flags |= IEEE80211_TX_RC_DUP_DATA;
 109         if (rate_n_flags & RATE_MCS_SGI_MSK)
 110                 r->flags |= IEEE80211_TX_RC_SHORT_GI;
 111         rate_index = iwl_hwrate_to_plcp_idx(rate_n_flags);
 112         if (info->band == IEEE80211_BAND_5GHZ)
 113                 rate_index -= IWL_FIRST_OFDM_RATE;
 114         r->idx = rate_index;
 115 }
 116 EXPORT_SYMBOL(iwl_hwrate_to_tx_control);
 117
 118 int iwl_hwrate_to_plcp_idx(u32 rate_n_flags)
 119 {
 120         int idx = 0;
 121
 122         /* HT rate format */
 123         if (rate_n_flags & RATE_MCS_HT_MSK) {
 124                 idx = (rate_n_flags & 0xff);
 125
 126                 if (idx >= IWL_RATE_MIMO3_6M_PLCP)
 127                         idx = idx - IWL_RATE_MIMO3_6M_PLCP;
 128                 else if (idx >= IWL_RATE_MIMO2_6M_PLCP)
 129                         idx = idx - IWL_RATE_MIMO2_6M_PLCP;
 130
 131                 idx += IWL_FIRST_OFDM_RATE;
 132                 /* skip 9M not supported in ht*/
 133                 if (idx >= IWL_RATE_9M_INDEX)
 134                         idx += 1;
 135                 if ((idx >= IWL_FIRST_OFDM_RATE) && (idx <= IWL_LAST_OFDM_RATE))
 136                         return idx;
 137
 138         /* legacy rate format, search for match in table */
 139         } else {
 140                 for (idx = 0; idx < ARRAY_SIZE(iwl_rates); idx++)
 141                         if (iwl_rates[idx].plcp == (rate_n_flags & 0xFF))
 142                                 return idx;
 143         }
 144
 145         return -1;
 146 }
 147 EXPORT_SYMBOL(iwl_hwrate_to_plcp_idx);
 148
 149 u8 iwl_toggle_tx_ant(struct iwl_priv *priv, u8 ant)
 150 {
 151         int i;
 152         u8 ind = ant;
 153         for (i = 0; i < RATE_ANT_NUM - 1; i++) {
 154                 ind = (ind + 1) < RATE_ANT_NUM ?  ind + 1 : 0;
 155                 if (priv->hw_params.valid_tx_ant & BIT(ind))
 156                         return ind;
 157         }
 158         return ant;
 159 }
 160
 161 const u8 iwl_bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
 162 EXPORT_SYMBOL(iwl_bcast_addr);
 163
 164
 165 /* This function both allocates and initializes hw and priv. */
 166 struct ieee80211_hw *iwl_alloc_all(struct iwl_cfg *cfg,
 167                 struct ieee80211_ops *hw_ops)
 168 {
 169         struct iwl_priv *priv;
 170
 171         /* mac80211 allocates memory for this device instance, including
 172          *   space for this driver's private structure */
 173         struct ieee80211_hw *hw =
 174                 ieee80211_alloc_hw(sizeof(struct iwl_priv), hw_ops);
 175         if (hw == NULL) {
 176                 printk(KERN_ERR "%s: Can not allocate network device\n",
 177                        cfg->name);
 178                 goto out;
 179         }
 180
 181         priv = hw->priv;
 182         priv->hw = hw;
 183
 184 out:
 185         return hw;
 186 }
 187 EXPORT_SYMBOL(iwl_alloc_all);
 188
 189 void iwl_hw_detect(struct iwl_priv *priv)
 190 {
 191         priv->hw_rev = _iwl_read32(priv, CSR_HW_REV);
 192         priv->hw_wa_rev = _iwl_read32(priv, CSR_HW_REV_WA_REG);
 193         pci_read_config_byte(priv->pci_dev, PCI_REVISION_ID, &priv->rev_id);
 194 }
 195 EXPORT_SYMBOL(iwl_hw_detect);
 196
 197 int iwl_hw_nic_init(struct iwl_priv *priv)
 198 {
 199         unsigned long flags;
 200         struct iwl_rx_queue *rxq = &priv->rxq;
 201         int ret;
 202
 203         /* nic_init */
 204         spin_lock_irqsave(&priv->lock, flags);
 205         priv->cfg->ops->lib->apm_ops.init(priv);
 206         iwl_write32(priv, CSR_INT_COALESCING, 512 / 32);
 207         spin_unlock_irqrestore(&priv->lock, flags);
 208
 209         ret = priv->cfg->ops->lib->apm_ops.set_pwr_src(priv, IWL_PWR_SRC_VMAIN);
 210
 211         priv->cfg->ops->lib->apm_ops.config(priv);
 212
 213         /* Allocate the RX queue, or reset if it is already allocated */
 214         if (!rxq->bd) {
 215                 ret = iwl_rx_queue_alloc(priv);
 216                 if (ret) {
 217                         IWL_ERR(priv, "Unable to initialize Rx queue\n");
 218                         return -ENOMEM;
 219                 }
 220         } else
 221                 iwl_rx_queue_reset(priv, rxq);
 222
 223         iwl_rx_replenish(priv);
 224
 225         iwl_rx_init(priv, rxq);
 226
 227         spin_lock_irqsave(&priv->lock, flags);
 228
 229         rxq->need_update = 1;
 230         iwl_rx_queue_update_write_ptr(priv, rxq);
 231
 232         spin_unlock_irqrestore(&priv->lock, flags);
 233
 234         /* Allocate and init all Tx and Command queues */
 235         ret = iwl_txq_ctx_reset(priv);
 236         if (ret)
 237                 return ret;
 238
 239         set_bit(STATUS_INIT, &priv->status);
 240
 241         return 0;
 242 }
 243 EXPORT_SYMBOL(iwl_hw_nic_init);
 244
 245 /*
 246  * QoS  support
 247 */
 248 void iwl_activate_qos(struct iwl_priv *priv, u8 force)
 249 {
 250         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 251                 return;
 252
 253         priv->qos_data.def_qos_parm.qos_flags = 0;
 254
 255         if (priv->qos_data.qos_cap.q_AP.queue_request &&
 256             !priv->qos_data.qos_cap.q_AP.txop_request)
 257                 priv->qos_data.def_qos_parm.qos_flags |=
 258                         QOS_PARAM_FLG_TXOP_TYPE_MSK;
 259         if (priv->qos_data.qos_active)
 260                 priv->qos_data.def_qos_parm.qos_flags |=
 261                         QOS_PARAM_FLG_UPDATE_EDCA_MSK;
 262
 263         if (priv->current_ht_config.is_ht)
 264                 priv->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
 265
 266         if (force || iwl_is_associated(priv)) {
 267                 IWL_DEBUG_QOS(priv, "send QoS cmd with Qos active=%d FLAGS=0x%X\n",
 268                                 priv->qos_data.qos_active,
 269                                 priv->qos_data.def_qos_parm.qos_flags);
 270
 271                 iwl_send_cmd_pdu_async(priv, REPLY_QOS_PARAM,
 272                                        sizeof(struct iwl_qosparam_cmd),
 273                                        &priv->qos_data.def_qos_parm, NULL);
 274         }
 275 }
 276 EXPORT_SYMBOL(iwl_activate_qos);
 277
 278 /*
 279  * AC        CWmin         CW max      AIFSN      TXOP Limit    TXOP Limit
 280  *                                              (802.11b)      (802.11a/g)
 281  * AC_BK      15            1023        7           0               0
 282  * AC_BE      15            1023        3           0               0
 283  * AC_VI       7              15        2          6.016ms       3.008ms
 284  * AC_VO       3               7        2          3.264ms       1.504ms
 285  */
 286 void iwl_reset_qos(struct iwl_priv *priv)
 287 {
 288         u16 cw_min = 15;
 289         u16 cw_max = 1023;
 290         u8 aifs = 2;
 291         bool is_legacy = false;
 292         unsigned long flags;
 293         int i;
 294
 295         spin_lock_irqsave(&priv->lock, flags);
 296         /* QoS always active in AP and ADHOC mode
 297          * In STA mode wait for association
 298          */
 299         if (priv->iw_mode == NL80211_IFTYPE_ADHOC ||
 300             priv->iw_mode == NL80211_IFTYPE_AP)
 301                 priv->qos_data.qos_active = 1;
 302         else
 303                 priv->qos_data.qos_active = 0;
 304
 305         /* check for legacy mode */
 306         if ((priv->iw_mode == NL80211_IFTYPE_ADHOC &&
 307             (priv->active_rate & IWL_OFDM_RATES_MASK) == 0) ||
 308             (priv->iw_mode == NL80211_IFTYPE_STATION &&
 309             (priv->staging_rxon.flags & RXON_FLG_SHORT_SLOT_MSK) == 0)) {
 310                 cw_min = 31;
 311                 is_legacy = 1;
 312         }
 313
 314         if (priv->qos_data.qos_active)
 315                 aifs = 3;
 316
 317         /* AC_BE */
 318         priv->qos_data.def_qos_parm.ac[0].cw_min = cpu_to_le16(cw_min);
 319         priv->qos_data.def_qos_parm.ac[0].cw_max = cpu_to_le16(cw_max);
 320         priv->qos_data.def_qos_parm.ac[0].aifsn = aifs;
 321         priv->qos_data.def_qos_parm.ac[0].edca_txop = 0;
 322         priv->qos_data.def_qos_parm.ac[0].reserved1 = 0;
 323
 324         if (priv->qos_data.qos_active) {
 325                 /* AC_BK */
 326                 i = 1;
 327                 priv->qos_data.def_qos_parm.ac[i].cw_min = cpu_to_le16(cw_min);
 328                 priv->qos_data.def_qos_parm.ac[i].cw_max = cpu_to_le16(cw_max);
 329                 priv->qos_data.def_qos_parm.ac[i].aifsn = 7;
 330                 priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
 331                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
 332
 333                 /* AC_VI */
 334                 i = 2;
 335                 priv->qos_data.def_qos_parm.ac[i].cw_min =
 336                         cpu_to_le16((cw_min + 1) / 2 - 1);
 337                 priv->qos_data.def_qos_parm.ac[i].cw_max =
 338                         cpu_to_le16(cw_min);
 339                 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
 340                 if (is_legacy)
 341                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
 342                                 cpu_to_le16(6016);
 343                 else
 344                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
 345                                 cpu_to_le16(3008);
 346                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
 347
 348                 /* AC_VO */
 349                 i = 3;
 350                 priv->qos_data.def_qos_parm.ac[i].cw_min =
 351                         cpu_to_le16((cw_min + 1) / 4 - 1);
 352                 priv->qos_data.def_qos_parm.ac[i].cw_max =
 353                         cpu_to_le16((cw_min + 1) / 2 - 1);
 354                 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
 355                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
 356                 if (is_legacy)
 357                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
 358                                 cpu_to_le16(3264);
 359                 else
 360                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
 361                                 cpu_to_le16(1504);
 362         } else {
 363                 for (i = 1; i < 4; i++) {
 364                         priv->qos_data.def_qos_parm.ac[i].cw_min =
 365                                 cpu_to_le16(cw_min);
 366                         priv->qos_data.def_qos_parm.ac[i].cw_max =
 367                                 cpu_to_le16(cw_max);
 368                         priv->qos_data.def_qos_parm.ac[i].aifsn = aifs;
 369                         priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
 370                         priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
 371                 }
 372         }
 373         IWL_DEBUG_QOS(priv, "set QoS to default \n");
 374
 375         spin_unlock_irqrestore(&priv->lock, flags);
 376 }
 377 EXPORT_SYMBOL(iwl_reset_qos);
 378
 379 #define MAX_BIT_RATE_40_MHZ 150 /* Mbps */
 380 #define MAX_BIT_RATE_20_MHZ 72 /* Mbps */
 381 static void iwlcore_init_ht_hw_capab(const struct iwl_priv *priv,
 382                               struct ieee80211_sta_ht_cap *ht_info,
 383                               enum ieee80211_band band)
 384 {
 385         u16 max_bit_rate = 0;
 386         u8 rx_chains_num = priv->hw_params.rx_chains_num;
 387         u8 tx_chains_num = priv->hw_params.tx_chains_num;
 388
 389         ht_info->cap = 0;
 390         memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));
 391
 392         ht_info->ht_supported = true;
 393
 394         ht_info->cap |= IEEE80211_HT_CAP_GRN_FLD;
 395         ht_info->cap |= IEEE80211_HT_CAP_SGI_20;
 396         ht_info->cap |= (IEEE80211_HT_CAP_SM_PS &
 397                              (WLAN_HT_CAP_SM_PS_DISABLED << 2));
 398
 399         max_bit_rate = MAX_BIT_RATE_20_MHZ;
 400         if (priv->hw_params.fat_channel & BIT(band)) {
 401                 ht_info->cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 402                 ht_info->cap |= IEEE80211_HT_CAP_SGI_40;
 403                 ht_info->mcs.rx_mask[4] = 0x01;
 404                 max_bit_rate = MAX_BIT_RATE_40_MHZ;
 405         }
 406
 407         if (priv->cfg->mod_params->amsdu_size_8K)
 408                 ht_info->cap |= IEEE80211_HT_CAP_MAX_AMSDU;
 409
 410         ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
 411         ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;
 412
 413         ht_info->mcs.rx_mask[0] = 0xFF;
 414         if (rx_chains_num >= 2)
 415                 ht_info->mcs.rx_mask[1] = 0xFF;
 416         if (rx_chains_num >= 3)
 417                 ht_info->mcs.rx_mask[2] = 0xFF;
 418
 419         /* Highest supported Rx data rate */
 420         max_bit_rate *= rx_chains_num;
 421         WARN_ON(max_bit_rate & ~IEEE80211_HT_MCS_RX_HIGHEST_MASK);
 422         ht_info->mcs.rx_highest = cpu_to_le16(max_bit_rate);
 423
 424         /* Tx MCS capabilities */
 425         ht_info->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
 426         if (tx_chains_num != rx_chains_num) {
 427                 ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
 428                 ht_info->mcs.tx_params |= ((tx_chains_num - 1) <<
 429                                 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT);
 430         }
 431 }
 432
 433 static void iwlcore_init_hw_rates(struct iwl_priv *priv,
 434                               struct ieee80211_rate *rates)
 435 {
 436         int i;
 437
 438         for (i = 0; i < IWL_RATE_COUNT; i++) {
 439                 rates[i].bitrate = iwl_rates[i].ieee * 5;
 440                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
 441                 rates[i].hw_value_short = i;
 442                 rates[i].flags = 0;
 443                 if ((i > IWL_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
 444                         /*
 445                          * If CCK != 1M then set short preamble rate flag.
 446                          */
 447                         rates[i].flags |=
 448                                 (iwl_rates[i].plcp == IWL_RATE_1M_PLCP) ?
 449                                         0 : IEEE80211_RATE_SHORT_PREAMBLE;
 450                 }
 451         }
 452 }
 453
 454
 455 /**
 456  * iwlcore_init_geos - Initialize mac80211's geo/channel info based from eeprom
 457  */
 458 int iwlcore_init_geos(struct iwl_priv *priv)
 459 {
 460         struct iwl_channel_info *ch;
 461         struct ieee80211_supported_band *sband;
 462         struct ieee80211_channel *channels;
 463         struct ieee80211_channel *geo_ch;
 464         struct ieee80211_rate *rates;
 465         int i = 0;
 466
 467         if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
 468             priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
 469                 IWL_DEBUG_INFO(priv, "Geography modes already initialized.\n");
 470                 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
 471                 return 0;
 472         }
 473
 474         channels = kzalloc(sizeof(struct ieee80211_channel) *
 475                            priv->channel_count, GFP_KERNEL);
 476         if (!channels)
 477                 return -ENOMEM;
 478
 479         rates = kzalloc((sizeof(struct ieee80211_rate) * (IWL_RATE_COUNT + 1)),
 480                         GFP_KERNEL);
 481         if (!rates) {
 482                 kfree(channels);
 483                 return -ENOMEM;
 484         }
 485
 486         /* 5.2GHz channels start after the 2.4GHz channels */
 487         sband = &priv->bands[IEEE80211_BAND_5GHZ];
 488         sband->channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)];
 489         /* just OFDM */
 490         sband->bitrates = &rates[IWL_FIRST_OFDM_RATE];
 491         sband->n_bitrates = IWL_RATE_COUNT - IWL_FIRST_OFDM_RATE;
 492
 493         if (priv->cfg->sku & IWL_SKU_N)
 494                 iwlcore_init_ht_hw_capab(priv, &sband->ht_cap,
 495                                          IEEE80211_BAND_5GHZ);
 496
 497         sband = &priv->bands[IEEE80211_BAND_2GHZ];
 498         sband->channels = channels;
 499         /* OFDM & CCK */
 500         sband->bitrates = rates;
 501         sband->n_bitrates = IWL_RATE_COUNT;
 502
 503         if (priv->cfg->sku & IWL_SKU_N)
 504                 iwlcore_init_ht_hw_capab(priv, &sband->ht_cap,
 505                                          IEEE80211_BAND_2GHZ);
 506
 507         priv->ieee_channels = channels;
 508         priv->ieee_rates = rates;
 509
 510         for (i = 0;  i < priv->channel_count; i++) {
 511                 ch = &priv->channel_info[i];
 512
 513                 /* FIXME: might be removed if scan is OK */
 514                 if (!is_channel_valid(ch))
 515                         continue;
 516
 517                 if (is_channel_a_band(ch))
 518                         sband =  &priv->bands[IEEE80211_BAND_5GHZ];
 519                 else
 520                         sband =  &priv->bands[IEEE80211_BAND_2GHZ];
 521
 522                 geo_ch = &sband->channels[sband->n_channels++];
 523
 524                 geo_ch->center_freq =
 525                                 ieee80211_channel_to_frequency(ch->channel);
 526                 geo_ch->max_power = ch->max_power_avg;
 527                 geo_ch->max_antenna_gain = 0xff;
 528                 geo_ch->hw_value = ch->channel;
 529
 530                 if (is_channel_valid(ch)) {
 531                         if (!(ch->flags & EEPROM_CHANNEL_IBSS))
 532                                 geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
 533
 534                         if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
 535                                 geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
 536
 537                         if (ch->flags & EEPROM_CHANNEL_RADAR)
 538                                 geo_ch->flags |= IEEE80211_CHAN_RADAR;
 539
 540                         geo_ch->flags |= ch->fat_extension_channel;
 541
 542                         if (ch->max_power_avg > priv->tx_power_channel_lmt)
 543                                 priv->tx_power_channel_lmt = ch->max_power_avg;
 544                 } else {
 545                         geo_ch->flags |= IEEE80211_CHAN_DISABLED;
 546                 }
 547
 548                 /* Save flags for reg domain usage */
 549                 geo_ch->orig_flags = geo_ch->flags;
 550
 551                 IWL_DEBUG_INFO(priv, "Channel %d Freq=%d[%sGHz] %s flag=0x%X\n",
 552                                 ch->channel, geo_ch->center_freq,
 553                                 is_channel_a_band(ch) ?  "5.2" : "2.4",
 554                                 geo_ch->flags & IEEE80211_CHAN_DISABLED ?
 555                                 "restricted" : "valid",
 556                                  geo_ch->flags);
 557         }
 558
 559         if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) &&
 560              priv->cfg->sku & IWL_SKU_A) {
 561                 IWL_INFO(priv, "Incorrectly detected BG card as ABG. "
 562                         "Please send your PCI ID 0x%04X:0x%04X to maintainer.\n",
 563                            priv->pci_dev->device,
 564                            priv->pci_dev->subsystem_device);
 565                 priv->cfg->sku &= ~IWL_SKU_A;
 566         }
 567
 568         IWL_INFO(priv, "Tunable channels: %d 802.11bg, %d 802.11a channels\n",
 569                    priv->bands[IEEE80211_BAND_2GHZ].n_channels,
 570                    priv->bands[IEEE80211_BAND_5GHZ].n_channels);
 571
 572         set_bit(STATUS_GEO_CONFIGURED, &priv->status);
 573
 574         return 0;
 575 }
 576 EXPORT_SYMBOL(iwlcore_init_geos);
 577
 578 /*
 579  * iwlcore_free_geos - undo allocations in iwlcore_init_geos
 580  */
 581 void iwlcore_free_geos(struct iwl_priv *priv)
 582 {
 583         kfree(priv->ieee_channels);
 584         kfree(priv->ieee_rates);
 585         clear_bit(STATUS_GEO_CONFIGURED, &priv->status);
 586 }
 587 EXPORT_SYMBOL(iwlcore_free_geos);
 588
 589 static bool is_single_rx_stream(struct iwl_priv *priv)
 590 {
 591         return !priv->current_ht_config.is_ht ||
 592                ((priv->current_ht_config.mcs.rx_mask[1] == 0) &&
 593                 (priv->current_ht_config.mcs.rx_mask[2] == 0));
 594 }
 595
 596 static u8 iwl_is_channel_extension(struct iwl_priv *priv,
 597                                    enum ieee80211_band band,
 598                                    u16 channel, u8 extension_chan_offset)
 599 {
 600         const struct iwl_channel_info *ch_info;
 601
 602         ch_info = iwl_get_channel_info(priv, band, channel);
 603         if (!is_channel_valid(ch_info))
 604                 return 0;
 605
 606         if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE)
 607                 return !(ch_info->fat_extension_channel &
 608                                         IEEE80211_CHAN_NO_HT40PLUS);
 609         else if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW)
 610                 return !(ch_info->fat_extension_channel &
 611                                         IEEE80211_CHAN_NO_HT40MINUS);
 612
 613         return 0;
 614 }
 615
 616 u8 iwl_is_fat_tx_allowed(struct iwl_priv *priv,
 617                          struct ieee80211_sta_ht_cap *sta_ht_inf)
 618 {
 619         struct iwl_ht_info *iwl_ht_conf = &priv->current_ht_config;
 620
 621         if ((!iwl_ht_conf->is_ht) ||
 622             (iwl_ht_conf->supported_chan_width != IWL_CHANNEL_WIDTH_40MHZ))
 623                 return 0;
 624
 625         /* We do not check for IEEE80211_HT_CAP_SUP_WIDTH_20_40
 626          * the bit will not set if it is pure 40MHz case
 627          */
 628         if (sta_ht_inf) {
 629                 if (!sta_ht_inf->ht_supported)
 630                         return 0;
 631         }
 632         return iwl_is_channel_extension(priv, priv->band,
 633                         le16_to_cpu(priv->staging_rxon.channel),
 634                         iwl_ht_conf->extension_chan_offset);
 635 }
 636 EXPORT_SYMBOL(iwl_is_fat_tx_allowed);
 637
 638 void iwl_set_rxon_hwcrypto(struct iwl_priv *priv, int hw_decrypt)
 639 {
 640         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
 641
 642         if (hw_decrypt)
 643                 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
 644         else
 645                 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
 646
 647 }
 648 EXPORT_SYMBOL(iwl_set_rxon_hwcrypto);
 649
 650 /**
 651  * iwl_check_rxon_cmd - validate RXON structure is valid
 652  *
 653  * NOTE:  This is really only useful during development and can eventually
 654  * be #ifdef'd out once the driver is stable and folks aren't actively
 655  * making changes
 656  */
 657 int iwl_check_rxon_cmd(struct iwl_priv *priv)
 658 {
 659         int error = 0;
 660         int counter = 1;
 661         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
 662
 663         if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
 664                 error |= le32_to_cpu(rxon->flags &
 665                                 (RXON_FLG_TGJ_NARROW_BAND_MSK |
 666                                  RXON_FLG_RADAR_DETECT_MSK));
 667                 if (error)
 668                         IWL_WARN(priv, "check 24G fields %d | %d\n",
 669                                     counter++, error);
 670         } else {
 671                 error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ?
 672                                 0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK);
 673                 if (error)
 674                         IWL_WARN(priv, "check 52 fields %d | %d\n",
 675                                     counter++, error);
 676                 error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK);
 677                 if (error)
 678                         IWL_WARN(priv, "check 52 CCK %d | %d\n",
 679                                     counter++, error);
 680         }
 681         error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1;
 682         if (error)
 683                 IWL_WARN(priv, "check mac addr %d | %d\n", counter++, error);
 684
 685         /* make sure basic rates 6Mbps and 1Mbps are supported */
 686         error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) &&
 687                   ((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0));
 688         if (error)
 689                 IWL_WARN(priv, "check basic rate %d | %d\n", counter++, error);
 690
 691         error |= (le16_to_cpu(rxon->assoc_id) > 2007);
 692         if (error)
 693                 IWL_WARN(priv, "check assoc id %d | %d\n", counter++, error);
 694
 695         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
 696                         == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK));
 697         if (error)
 698                 IWL_WARN(priv, "check CCK and short slot %d | %d\n",
 699                             counter++, error);
 700
 701         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
 702                         == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK));
 703         if (error)
 704                 IWL_WARN(priv, "check CCK & auto detect %d | %d\n",
 705                             counter++, error);
 706
 707         error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
 708                         RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK);
 709         if (error)
 710                 IWL_WARN(priv, "check TGG and auto detect %d | %d\n",
 711                             counter++, error);
 712
 713         if (error)
 714                 IWL_WARN(priv, "Tuning to channel %d\n",
 715                             le16_to_cpu(rxon->channel));
 716
 717         if (error) {
 718                 IWL_ERR(priv, "Not a valid iwl_rxon_assoc_cmd field values\n");
 719                 return -1;
 720         }
 721         return 0;
 722 }
 723 EXPORT_SYMBOL(iwl_check_rxon_cmd);
 724
 725 /**
 726  * iwl_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
 727  * @priv: staging_rxon is compared to active_rxon
 728  *
 729  * If the RXON structure is changing enough to require a new tune,
 730  * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
 731  * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
 732  */
 733 int iwl_full_rxon_required(struct iwl_priv *priv)
 734 {
 735
 736         /* These items are only settable from the full RXON command */
 737         if (!(iwl_is_associated(priv)) ||
 738             compare_ether_addr(priv->staging_rxon.bssid_addr,
 739                                priv->active_rxon.bssid_addr) ||
 740             compare_ether_addr(priv->staging_rxon.node_addr,
 741                                priv->active_rxon.node_addr) ||
 742             compare_ether_addr(priv->staging_rxon.wlap_bssid_addr,
 743                                priv->active_rxon.wlap_bssid_addr) ||
 744             (priv->staging_rxon.dev_type != priv->active_rxon.dev_type) ||
 745             (priv->staging_rxon.channel != priv->active_rxon.channel) ||
 746             (priv->staging_rxon.air_propagation !=
 747              priv->active_rxon.air_propagation) ||
 748             (priv->staging_rxon.ofdm_ht_single_stream_basic_rates !=
 749              priv->active_rxon.ofdm_ht_single_stream_basic_rates) ||
 750             (priv->staging_rxon.ofdm_ht_dual_stream_basic_rates !=
 751              priv->active_rxon.ofdm_ht_dual_stream_basic_rates) ||
 752             (priv->staging_rxon.ofdm_ht_triple_stream_basic_rates !=
 753              priv->active_rxon.ofdm_ht_triple_stream_basic_rates) ||
 754             (priv->staging_rxon.assoc_id != priv->active_rxon.assoc_id))
 755                 return 1;
 756
 757         /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
 758          * be updated with the RXON_ASSOC command -- however only some
 759          * flag transitions are allowed using RXON_ASSOC */
 760
 761         /* Check if we are not switching bands */
 762         if ((priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) !=
 763             (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK))
 764                 return 1;
 765
 766         /* Check if we are switching association toggle */
 767         if ((priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) !=
 768                 (priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK))
 769                 return 1;
 770
 771         return 0;
 772 }
 773 EXPORT_SYMBOL(iwl_full_rxon_required);
 774
 775 u8 iwl_rate_get_lowest_plcp(struct iwl_priv *priv)
 776 {
 777         int i;
 778         int rate_mask;
 779
 780         /* Set rate mask*/
 781         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)
 782                 rate_mask = priv->active_rate_basic & IWL_CCK_RATES_MASK;
 783         else
 784                 rate_mask = priv->active_rate_basic & IWL_OFDM_RATES_MASK;
 785
 786         /* Find lowest valid rate */
 787         for (i = IWL_RATE_1M_INDEX; i != IWL_RATE_INVALID;
 788                                         i = iwl_rates[i].next_ieee) {
 789                 if (rate_mask & (1 << i))
 790                         return iwl_rates[i].plcp;
 791         }
 792
 793         /* No valid rate was found. Assign the lowest one */
 794         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)
 795                 return IWL_RATE_1M_PLCP;
 796         else
 797                 return IWL_RATE_6M_PLCP;
 798 }
 799 EXPORT_SYMBOL(iwl_rate_get_lowest_plcp);
 800
 801 void iwl_set_rxon_ht(struct iwl_priv *priv, struct iwl_ht_info *ht_info)
 802 {
 803         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
 804
 805         if (!ht_info->is_ht) {
 806                 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
 807                         RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK |
 808                         RXON_FLG_FAT_PROT_MSK |
 809                         RXON_FLG_HT_PROT_MSK);
 810                 return;
 811         }
 812
 813         /* FIXME: if the definition of ht_protection changed, the "translation"
 814          * will be needed for rxon->flags
 815          */
 816         rxon->flags |= cpu_to_le32(ht_info->ht_protection << RXON_FLG_HT_OPERATING_MODE_POS);
 817
 818         /* Set up channel bandwidth:
 819          * 20 MHz only, 20/40 mixed or pure 40 if fat ok */
 820         /* clear the HT channel mode before set the mode */
 821         rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
 822                          RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
 823         if (iwl_is_fat_tx_allowed(priv, NULL)) {
 824                 /* pure 40 fat */
 825                 if (ht_info->ht_protection == IEEE80211_HT_OP_MODE_PROTECTION_20MHZ) {
 826                         rxon->flags |= RXON_FLG_CHANNEL_MODE_PURE_40;
 827                         /* Note: control channel is opposite of extension channel */
 828                         switch (ht_info->extension_chan_offset) {
 829                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 830                                 rxon->flags &= ~RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
 831                                 break;
 832                         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 833                                 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
 834                                 break;
 835                         }
 836                 } else {
 837                         /* Note: control channel is opposite of extension channel */
 838                         switch (ht_info->extension_chan_offset) {
 839                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 840                                 rxon->flags &= ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
 841                                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
 842                                 break;
 843                         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 844                                 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
 845                                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
 846                                 break;
 847                         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
 848                         default:
 849                                 /* channel location only valid if in Mixed mode */
 850                                 IWL_ERR(priv, "invalid extension channel offset\n");
 851                                 break;
 852                         }
 853                 }
 854         } else {
 855                 rxon->flags |= RXON_FLG_CHANNEL_MODE_LEGACY;
 856         }
 857
 858         if (priv->cfg->ops->hcmd->set_rxon_chain)
 859                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
 860
 861         IWL_DEBUG_ASSOC(priv, "supported HT rate 0x%X 0x%X 0x%X "
 862                         "rxon flags 0x%X operation mode :0x%X "
 863                         "extension channel offset 0x%x\n",
 864                         ht_info->mcs.rx_mask[0],
 865                         ht_info->mcs.rx_mask[1],
 866                         ht_info->mcs.rx_mask[2],
 867                         le32_to_cpu(rxon->flags), ht_info->ht_protection,
 868                         ht_info->extension_chan_offset);
 869         return;
 870 }
 871 EXPORT_SYMBOL(iwl_set_rxon_ht);
 872
 873 #define IWL_NUM_RX_CHAINS_MULTIPLE      3
 874 #define IWL_NUM_RX_CHAINS_SINGLE        2
 875 #define IWL_NUM_IDLE_CHAINS_DUAL        2
 876 #define IWL_NUM_IDLE_CHAINS_SINGLE      1
 877
 878 /* Determine how many receiver/antenna chains to use.
 879  * More provides better reception via diversity.  Fewer saves power.
 880  * MIMO (dual stream) requires at least 2, but works better with 3.
 881  * This does not determine *which* chains to use, just how many.
 882  */
 883 static int iwl_get_active_rx_chain_count(struct iwl_priv *priv)
 884 {
 885         bool is_single = is_single_rx_stream(priv);
 886         bool is_cam = !test_bit(STATUS_POWER_PMI, &priv->status);
 887
 888         /* # of Rx chains to use when expecting MIMO. */
 889         if (is_single || (!is_cam && (priv->current_ht_config.sm_ps ==
 890                                                  WLAN_HT_CAP_SM_PS_STATIC)))
 891                 return IWL_NUM_RX_CHAINS_SINGLE;
 892         else
 893                 return IWL_NUM_RX_CHAINS_MULTIPLE;
 894 }
 895
 896 static int iwl_get_idle_rx_chain_count(struct iwl_priv *priv, int active_cnt)
 897 {
 898         int idle_cnt;
 899         bool is_cam = !test_bit(STATUS_POWER_PMI, &priv->status);
 900         /* # Rx chains when idling and maybe trying to save power */
 901         switch (priv->current_ht_config.sm_ps) {
 902         case WLAN_HT_CAP_SM_PS_STATIC:
 903         case WLAN_HT_CAP_SM_PS_DYNAMIC:
 904                 idle_cnt = (is_cam) ? IWL_NUM_IDLE_CHAINS_DUAL :
 905                                         IWL_NUM_IDLE_CHAINS_SINGLE;
 906                 break;
 907         case WLAN_HT_CAP_SM_PS_DISABLED:
 908                 idle_cnt = (is_cam) ? active_cnt : IWL_NUM_IDLE_CHAINS_SINGLE;
 909                 break;
 910         case WLAN_HT_CAP_SM_PS_INVALID:
 911         default:
 912                 IWL_ERR(priv, "invalid mimo ps mode %d\n",
 913                            priv->current_ht_config.sm_ps);
 914                 WARN_ON(1);
 915                 idle_cnt = -1;
 916                 break;
 917         }
 918         return idle_cnt;
 919 }
 920
 921 /* up to 4 chains */
 922 static u8 iwl_count_chain_bitmap(u32 chain_bitmap)
 923 {
 924         u8 res;
 925         res = (chain_bitmap & BIT(0)) >> 0;
 926         res += (chain_bitmap & BIT(1)) >> 1;
 927         res += (chain_bitmap & BIT(2)) >> 2;
 928         res += (chain_bitmap & BIT(4)) >> 4;
 929         return res;
 930 }
 931
 932 /**
 933  * iwl_is_monitor_mode - Determine if interface in monitor mode
 934  *
 935  * priv->iw_mode is set in add_interface, but add_interface is
 936  * never called for monitor mode. The only way mac80211 informs us about
 937  * monitor mode is through configuring filters (call to configure_filter).
 938  */
 939 bool iwl_is_monitor_mode(struct iwl_priv *priv)
 940 {
 941         return !!(priv->staging_rxon.filter_flags & RXON_FILTER_PROMISC_MSK);
 942 }
 943 EXPORT_SYMBOL(iwl_is_monitor_mode);
 944
 945 /**
 946  * iwl_set_rxon_chain - Set up Rx chain usage in "staging" RXON image
 947  *
 948  * Selects how many and which Rx receivers/antennas/chains to use.
 949  * This should not be used for scan command ... it puts data in wrong place.
 950  */
 951 void iwl_set_rxon_chain(struct iwl_priv *priv)
 952 {
 953         bool is_single = is_single_rx_stream(priv);
 954         bool is_cam = !test_bit(STATUS_POWER_PMI, &priv->status);
 955         u8 idle_rx_cnt, active_rx_cnt, valid_rx_cnt;
 956         u32 active_chains;
 957         u16 rx_chain;
 958
 959         /* Tell uCode which antennas are actually connected.
 960          * Before first association, we assume all antennas are connected.
 961          * Just after first association, iwl_chain_noise_calibration()
 962          *    checks which antennas actually *are* connected. */
 963          if (priv->chain_noise_data.active_chains)
 964                 active_chains = priv->chain_noise_data.active_chains;
 965         else
 966                 active_chains = priv->hw_params.valid_rx_ant;
 967
 968         rx_chain = active_chains << RXON_RX_CHAIN_VALID_POS;
 969
 970         /* How many receivers should we use? */
 971         active_rx_cnt = iwl_get_active_rx_chain_count(priv);
 972         idle_rx_cnt = iwl_get_idle_rx_chain_count(priv, active_rx_cnt);
 973
 974
 975         /* correct rx chain count according hw settings
 976          * and chain noise calibration
 977          */
 978         valid_rx_cnt = iwl_count_chain_bitmap(active_chains);
 979         if (valid_rx_cnt < active_rx_cnt)
 980                 active_rx_cnt = valid_rx_cnt;
 981
 982         if (valid_rx_cnt < idle_rx_cnt)
 983                 idle_rx_cnt = valid_rx_cnt;
 984
 985         rx_chain |= active_rx_cnt << RXON_RX_CHAIN_MIMO_CNT_POS;
 986         rx_chain |= idle_rx_cnt  << RXON_RX_CHAIN_CNT_POS;
 987
 988         /* copied from 'iwl_bg_request_scan()' */
 989         /* Force use of chains B and C (0x6) for Rx for 4965
 990          * Avoid A (0x1) because of its off-channel reception on A-band.
 991          * MIMO is not used here, but value is required */
 992         if (iwl_is_monitor_mode(priv) &&
 993             !(priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) &&
 994             ((priv->hw_rev & CSR_HW_REV_TYPE_MSK) == CSR_HW_REV_TYPE_4965)) {
 995                 rx_chain = ANT_ABC << RXON_RX_CHAIN_VALID_POS;
 996                 rx_chain |= ANT_BC << RXON_RX_CHAIN_FORCE_SEL_POS;
 997                 rx_chain |= ANT_ABC << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS;
 998                 rx_chain |= 0x1 << RXON_RX_CHAIN_DRIVER_FORCE_POS;
 999         }
1000
1001         priv->staging_rxon.rx_chain = cpu_to_le16(rx_chain);
1002
1003         if (!is_single && (active_rx_cnt >= IWL_NUM_RX_CHAINS_SINGLE) && is_cam)
1004                 priv->staging_rxon.rx_chain |= RXON_RX_CHAIN_MIMO_FORCE_MSK;
1005         else
1006                 priv->staging_rxon.rx_chain &= ~RXON_RX_CHAIN_MIMO_FORCE_MSK;
1007
1008         IWL_DEBUG_ASSOC(priv, "rx_chain=0x%X active=%d idle=%d\n",
1009                         priv->staging_rxon.rx_chain,
1010                         active_rx_cnt, idle_rx_cnt);
1011
1012         WARN_ON(active_rx_cnt == 0 || idle_rx_cnt == 0 ||
1013                 active_rx_cnt < idle_rx_cnt);
1014 }
1015 EXPORT_SYMBOL(iwl_set_rxon_chain);
1016
1017 /**
1018  * iwl_set_rxon_channel - Set the phymode and channel values in staging RXON
1019  * @phymode: MODE_IEEE80211A sets to 5.2GHz; all else set to 2.4GHz
1020  * @channel: Any channel valid for the requested phymode
1021
1022  * In addition to setting the staging RXON, priv->phymode is also set.
1023  *
1024  * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
1025  * in the staging RXON flag structure based on the phymode
1026  */
1027 int iwl_set_rxon_channel(struct iwl_priv *priv, struct ieee80211_channel *ch)
1028 {
1029         enum ieee80211_band band = ch->band;
1030         u16 channel = ieee80211_frequency_to_channel(ch->center_freq);
1031
1032         if (!iwl_get_channel_info(priv, band, channel)) {
1033                 IWL_DEBUG_INFO(priv, "Could not set channel to %d [%d]\n",
1034                                channel, band);
1035                 return -EINVAL;
1036         }
1037
1038         if ((le16_to_cpu(priv->staging_rxon.channel) == channel) &&
1039             (priv->band == band))
1040                 return 0;
1041
1042         priv->staging_rxon.channel = cpu_to_le16(channel);
1043         if (band == IEEE80211_BAND_5GHZ)
1044                 priv->staging_rxon.flags &= ~RXON_FLG_BAND_24G_MSK;
1045         else
1046                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
1047
1048         priv->band = band;
1049
1050         IWL_DEBUG_INFO(priv, "Staging channel set to %d [%d]\n", channel, band);
1051
1052         return 0;
1053 }
1054 EXPORT_SYMBOL(iwl_set_rxon_channel);
1055
1056 void iwl_set_flags_for_band(struct iwl_priv *priv,
1057                             enum ieee80211_band band)
1058 {
1059         if (band == IEEE80211_BAND_5GHZ) {
1060                 priv->staging_rxon.flags &=
1061                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
1062                       | RXON_FLG_CCK_MSK);
1063                 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
1064         } else {
1065                 /* Copied from iwl_post_associate() */
1066                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
1067                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
1068                 else
1069                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
1070
1071                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
1072                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
1073
1074                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
1075                 priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
1076                 priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
1077         }
1078 }
1079 EXPORT_SYMBOL(iwl_set_flags_for_band);
1080
1081 /*
1082  * initialize rxon structure with default values from eeprom
1083  */
1084 void iwl_connection_init_rx_config(struct iwl_priv *priv, int mode)
1085 {
1086         const struct iwl_channel_info *ch_info;
1087
1088         memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
1089
1090         switch (mode) {
1091         case NL80211_IFTYPE_AP:
1092                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
1093                 break;
1094
1095         case NL80211_IFTYPE_STATION:
1096                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
1097                 priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
1098                 break;
1099
1100         case NL80211_IFTYPE_ADHOC:
1101                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
1102                 priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
1103                 priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
1104                                                   RXON_FILTER_ACCEPT_GRP_MSK;
1105                 break;
1106
1107         default:
1108                 IWL_ERR(priv, "Unsupported interface type %d\n", mode);
1109                 break;
1110         }
1111
1112 #if 0
1113         /* TODO:  Figure out when short_preamble would be set and cache from
1114          * that */
1115         if (!hw_to_local(priv->hw)->short_preamble)
1116                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
1117         else
1118                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
1119 #endif
1120
1121         ch_info = iwl_get_channel_info(priv, priv->band,
1122                                        le16_to_cpu(priv->active_rxon.channel));
1123
1124         if (!ch_info)
1125                 ch_info = &priv->channel_info[0];
1126
1127         /*
1128          * in some case A channels are all non IBSS
1129          * in this case force B/G channel
1130          */
1131         if ((priv->iw_mode == NL80211_IFTYPE_ADHOC) &&
1132             !(is_channel_ibss(ch_info)))
1133                 ch_info = &priv->channel_info[0];
1134
1135         priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
1136         priv->band = ch_info->band;
1137
1138         iwl_set_flags_for_band(priv, priv->band);
1139
1140         priv->staging_rxon.ofdm_basic_rates =
1141             (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
1142         priv->staging_rxon.cck_basic_rates =
1143             (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
1144
1145         /* clear both MIX and PURE40 mode flag */
1146         priv->staging_rxon.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED |
1147                                         RXON_FLG_CHANNEL_MODE_PURE_40);
1148         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
1149         memcpy(priv->staging_rxon.wlap_bssid_addr, priv->mac_addr, ETH_ALEN);
1150         priv->staging_rxon.ofdm_ht_single_stream_basic_rates = 0xff;
1151         priv->staging_rxon.ofdm_ht_dual_stream_basic_rates = 0xff;
1152         priv->staging_rxon.ofdm_ht_triple_stream_basic_rates = 0xff;
1153 }
1154 EXPORT_SYMBOL(iwl_connection_init_rx_config);
1155
1156 static void iwl_set_rate(struct iwl_priv *priv)
1157 {
1158         const struct ieee80211_supported_band *hw = NULL;
1159         struct ieee80211_rate *rate;
1160         int i;
1161
1162         hw = iwl_get_hw_mode(priv, priv->band);
1163         if (!hw) {
1164                 IWL_ERR(priv, "Failed to set rate: unable to get hw mode\n");
1165                 return;
1166         }
1167
1168         priv->active_rate = 0;
1169         priv->active_rate_basic = 0;
1170
1171         for (i = 0; i < hw->n_bitrates; i++) {
1172                 rate = &(hw->bitrates[i]);
1173                 if (rate->hw_value < IWL_RATE_COUNT)
1174                         priv->active_rate |= (1 << rate->hw_value);
1175         }
1176
1177         IWL_DEBUG_RATE(priv, "Set active_rate = %0x, active_rate_basic = %0x\n",
1178                        priv->active_rate, priv->active_rate_basic);
1179
1180         /*
1181          * If a basic rate is configured, then use it (adding IWL_RATE_1M_MASK)
1182          * otherwise set it to the default of all CCK rates and 6, 12, 24 for
1183          * OFDM
1184          */
1185         if (priv->active_rate_basic & IWL_CCK_BASIC_RATES_MASK)
1186                 priv->staging_rxon.cck_basic_rates =
1187                     ((priv->active_rate_basic &
1188                       IWL_CCK_RATES_MASK) >> IWL_FIRST_CCK_RATE) & 0xF;
1189         else
1190                 priv->staging_rxon.cck_basic_rates =
1191                     (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
1192
1193         if (priv->active_rate_basic & IWL_OFDM_BASIC_RATES_MASK)
1194                 priv->staging_rxon.ofdm_basic_rates =
1195                     ((priv->active_rate_basic &
1196                       (IWL_OFDM_BASIC_RATES_MASK | IWL_RATE_6M_MASK)) >>
1197                       IWL_FIRST_OFDM_RATE) & 0xFF;
1198         else
1199                 priv->staging_rxon.ofdm_basic_rates =
1200                    (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
1201 }
1202
1203 void iwl_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
1204 {
1205         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
1206         struct iwl_rxon_cmd *rxon = (void *)&priv->active_rxon;
1207         struct iwl_csa_notification *csa = &(pkt->u.csa_notif);
1208         IWL_DEBUG_11H(priv, "CSA notif: channel %d, status %d\n",
1209                       le16_to_cpu(csa->channel), le32_to_cpu(csa->status));
1210         rxon->channel = csa->channel;
1211         priv->staging_rxon.channel = csa->channel;
1212 }
1213 EXPORT_SYMBOL(iwl_rx_csa);
1214
1215 #ifdef CONFIG_IWLWIFI_DEBUG
1216 static void iwl_print_rx_config_cmd(struct iwl_priv *priv)
1217 {
1218         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
1219
1220         IWL_DEBUG_RADIO(priv, "RX CONFIG:\n");
1221         iwl_print_hex_dump(priv, IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
1222         IWL_DEBUG_RADIO(priv, "u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
1223         IWL_DEBUG_RADIO(priv, "u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
1224         IWL_DEBUG_RADIO(priv, "u32 filter_flags: 0x%08x\n",
1225                         le32_to_cpu(rxon->filter_flags));
1226         IWL_DEBUG_RADIO(priv, "u8 dev_type: 0x%x\n", rxon->dev_type);
1227         IWL_DEBUG_RADIO(priv, "u8 ofdm_basic_rates: 0x%02x\n",
1228                         rxon->ofdm_basic_rates);
1229         IWL_DEBUG_RADIO(priv, "u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
1230         IWL_DEBUG_RADIO(priv, "u8[6] node_addr: %pM\n", rxon->node_addr);
1231         IWL_DEBUG_RADIO(priv, "u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
1232         IWL_DEBUG_RADIO(priv, "u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
1233 }
1234 #endif
1235
1236 /**
1237  * iwl_irq_handle_error - called for HW or SW error interrupt from card
1238  */
1239 void iwl_irq_handle_error(struct iwl_priv *priv)
1240 {
1241         /* Set the FW error flag -- cleared on iwl_down */
1242         set_bit(STATUS_FW_ERROR, &priv->status);
1243
1244         /* Cancel currently queued command. */
1245         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
1246
1247 #ifdef CONFIG_IWLWIFI_DEBUG
1248         if (priv->debug_level & IWL_DL_FW_ERRORS) {
1249                 iwl_dump_nic_error_log(priv);
1250                 iwl_dump_nic_event_log(priv);
1251                 iwl_print_rx_config_cmd(priv);
1252         }
1253 #endif
1254
1255         wake_up_interruptible(&priv->wait_command_queue);
1256
1257         /* Keep the restart process from trying to send host
1258          * commands by clearing the INIT status bit */
1259         clear_bit(STATUS_READY, &priv->status);
1260
1261         if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1262                 IWL_DEBUG(priv, IWL_DL_FW_ERRORS,
1263                           "Restarting adapter due to uCode error.\n");
1264
1265                 if (priv->cfg->mod_params->restart_fw)
1266                         queue_work(priv->workqueue, &priv->restart);
1267         }
1268 }
1269 EXPORT_SYMBOL(iwl_irq_handle_error);
1270
1271 void iwl_configure_filter(struct ieee80211_hw *hw,
1272                           unsigned int changed_flags,
1273                           unsigned int *total_flags,
1274                           int mc_count, struct dev_addr_list *mc_list)
1275 {
1276         struct iwl_priv *priv = hw->priv;
1277         __le32 *filter_flags = &priv->staging_rxon.filter_flags;
1278
1279         IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
1280                         changed_flags, *total_flags);
1281
1282         if (changed_flags & (FIF_OTHER_BSS | FIF_PROMISC_IN_BSS)) {
1283                 if (*total_flags & (FIF_OTHER_BSS | FIF_PROMISC_IN_BSS))
1284                         *filter_flags |= RXON_FILTER_PROMISC_MSK;
1285                 else
1286                         *filter_flags &= ~RXON_FILTER_PROMISC_MSK;
1287         }
1288         if (changed_flags & FIF_ALLMULTI) {
1289                 if (*total_flags & FIF_ALLMULTI)
1290                         *filter_flags |= RXON_FILTER_ACCEPT_GRP_MSK;
1291                 else
1292                         *filter_flags &= ~RXON_FILTER_ACCEPT_GRP_MSK;
1293         }
1294         if (changed_flags & FIF_CONTROL) {
1295                 if (*total_flags & FIF_CONTROL)
1296                         *filter_flags |= RXON_FILTER_CTL2HOST_MSK;
1297                 else
1298                         *filter_flags &= ~RXON_FILTER_CTL2HOST_MSK;
1299         }
1300         if (changed_flags & FIF_BCN_PRBRESP_PROMISC) {
1301                 if (*total_flags & FIF_BCN_PRBRESP_PROMISC)
1302                         *filter_flags |= RXON_FILTER_BCON_AWARE_MSK;
1303                 else
1304                         *filter_flags &= ~RXON_FILTER_BCON_AWARE_MSK;
1305         }
1306
1307         /* We avoid iwl_commit_rxon here to commit the new filter flags
1308          * since mac80211 will call ieee80211_hw_config immediately.
1309          * (mc_list is not supported at this time). Otherwise, we need to
1310          * queue a background iwl_commit_rxon work.
1311          */
1312
1313         *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
1314                         FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
1315 }
1316 EXPORT_SYMBOL(iwl_configure_filter);
1317
1318 int iwl_setup_mac(struct iwl_priv *priv)
1319 {
1320         int ret;
1321         struct ieee80211_hw *hw = priv->hw;
1322         hw->rate_control_algorithm = "iwl-agn-rs";
1323
1324         /* Tell mac80211 our characteristics */
1325         hw->flags = IEEE80211_HW_SIGNAL_DBM |
1326                     IEEE80211_HW_NOISE_DBM |
1327                     IEEE80211_HW_AMPDU_AGGREGATION |
1328                     IEEE80211_HW_SPECTRUM_MGMT;
1329         hw->wiphy->interface_modes =
1330                 BIT(NL80211_IFTYPE_STATION) |
1331                 BIT(NL80211_IFTYPE_ADHOC);
1332
1333         hw->wiphy->custom_regulatory = true;
1334
1335         /* Firmware does not support this */
1336         hw->wiphy->disable_beacon_hints = true;
1337
1338         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
1339         /* we create the 802.11 header and a zero-length SSID element */
1340         hw->wiphy->max_scan_ie_len = IWL_MAX_PROBE_REQUEST - 24 - 2;
1341
1342         /* Default value; 4 EDCA QOS priorities */
1343         hw->queues = 4;
1344
1345         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
1346
1347         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
1348                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
1349                         &priv->bands[IEEE80211_BAND_2GHZ];
1350         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
1351                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
1352                         &priv->bands[IEEE80211_BAND_5GHZ];
1353
1354         ret = ieee80211_register_hw(priv->hw);
1355         if (ret) {
1356                 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
1357                 return ret;
1358         }
1359         priv->mac80211_registered = 1;
1360
1361         return 0;
1362 }
1363 EXPORT_SYMBOL(iwl_setup_mac);
1364
1365 int iwl_set_hw_params(struct iwl_priv *priv)
1366 {
1367         priv->hw_params.sw_crypto = priv->cfg->mod_params->sw_crypto;
1368         priv->hw_params.max_rxq_size = RX_QUEUE_SIZE;
1369         priv->hw_params.max_rxq_log = RX_QUEUE_SIZE_LOG;
1370         if (priv->cfg->mod_params->amsdu_size_8K)
1371                 priv->hw_params.rx_buf_size = IWL_RX_BUF_SIZE_8K;
1372         else
1373                 priv->hw_params.rx_buf_size = IWL_RX_BUF_SIZE_4K;
1374         priv->hw_params.max_pkt_size = priv->hw_params.rx_buf_size - 256;
1375
1376         if (priv->cfg->mod_params->disable_11n)
1377                 priv->cfg->sku &= ~IWL_SKU_N;
1378
1379         /* Device-specific setup */
1380         return priv->cfg->ops->lib->set_hw_params(priv);
1381 }
1382 EXPORT_SYMBOL(iwl_set_hw_params);
1383
1384 int iwl_init_drv(struct iwl_priv *priv)
1385 {
1386         int ret;
1387
1388         priv->ibss_beacon = NULL;
1389
1390         spin_lock_init(&priv->lock);
1391         spin_lock_init(&priv->sta_lock);
1392         spin_lock_init(&priv->hcmd_lock);
1393
1394         INIT_LIST_HEAD(&priv->free_frames);
1395
1396         mutex_init(&priv->mutex);
1397
1398         /* Clear the driver's (not device's) station table */
1399         iwl_clear_stations_table(priv);
1400
1401         priv->data_retry_limit = -1;
1402         priv->ieee_channels = NULL;
1403         priv->ieee_rates = NULL;
1404         priv->band = IEEE80211_BAND_2GHZ;
1405
1406         priv->iw_mode = NL80211_IFTYPE_STATION;
1407
1408         priv->current_ht_config.sm_ps = WLAN_HT_CAP_SM_PS_DISABLED;
1409
1410         /* Choose which receivers/antennas to use */
1411         if (priv->cfg->ops->hcmd->set_rxon_chain)
1412                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
1413
1414         iwl_init_scan_params(priv);
1415
1416         iwl_reset_qos(priv);
1417
1418         priv->qos_data.qos_active = 0;
1419         priv->qos_data.qos_cap.val = 0;
1420
1421         priv->rates_mask = IWL_RATES_MASK;
1422         /* If power management is turned on, default to CAM mode */
1423         priv->power_mode = IWL_POWER_MODE_CAM;
1424         priv->tx_power_user_lmt = IWL_TX_POWER_TARGET_POWER_MAX;
1425
1426         ret = iwl_init_channel_map(priv);
1427         if (ret) {
1428                 IWL_ERR(priv, "initializing regulatory failed: %d\n", ret);
1429                 goto err;
1430         }
1431
1432         ret = iwlcore_init_geos(priv);
1433         if (ret) {
1434                 IWL_ERR(priv, "initializing geos failed: %d\n", ret);
1435                 goto err_free_channel_map;
1436         }
1437         iwlcore_init_hw_rates(priv, priv->ieee_rates);
1438
1439         return 0;
1440
1441 err_free_channel_map:
1442         iwl_free_channel_map(priv);
1443 err:
1444         return ret;
1445 }
1446 EXPORT_SYMBOL(iwl_init_drv);
1447
1448 int iwl_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force)
1449 {
1450         int ret = 0;
1451         if (tx_power < IWL_TX_POWER_TARGET_POWER_MIN) {
1452                 IWL_WARN(priv, "Requested user TXPOWER %d below lower limit %d.\n",
1453                          tx_power,
1454                          IWL_TX_POWER_TARGET_POWER_MIN);
1455                 return -EINVAL;
1456         }
1457
1458         if (tx_power > IWL_TX_POWER_TARGET_POWER_MAX) {
1459                 IWL_WARN(priv, "Requested user TXPOWER %d above upper limit %d.\n",
1460                          tx_power,
1461                          IWL_TX_POWER_TARGET_POWER_MAX);
1462                 return -EINVAL;
1463         }
1464
1465         if (priv->tx_power_user_lmt != tx_power)
1466                 force = true;
1467
1468         priv->tx_power_user_lmt = tx_power;
1469
1470         /* if nic is not up don't send command */
1471         if (!iwl_is_ready_rf(priv))
1472                 return ret;
1473
1474         if (force && priv->cfg->ops->lib->send_tx_power)
1475                 ret = priv->cfg->ops->lib->send_tx_power(priv);
1476
1477         return ret;
1478 }
1479 EXPORT_SYMBOL(iwl_set_tx_power);
1480
1481 void iwl_uninit_drv(struct iwl_priv *priv)
1482 {
1483         iwl_calib_free_results(priv);
1484         iwlcore_free_geos(priv);
1485         iwl_free_channel_map(priv);
1486         kfree(priv->scan);
1487 }
1488 EXPORT_SYMBOL(iwl_uninit_drv);
1489
1490
1491 void iwl_disable_interrupts(struct iwl_priv *priv)
1492 {
1493         clear_bit(STATUS_INT_ENABLED, &priv->status);
1494
1495         /* disable interrupts from uCode/NIC to host */
1496         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
1497
1498         /* acknowledge/clear/reset any interrupts still pending
1499          * from uCode or flow handler (Rx/Tx DMA) */
1500         iwl_write32(priv, CSR_INT, 0xffffffff);
1501         iwl_write32(priv, CSR_FH_INT_STATUS, 0xffffffff);
1502         IWL_DEBUG_ISR(priv, "Disabled interrupts\n");
1503 }
1504 EXPORT_SYMBOL(iwl_disable_interrupts);
1505
1506 void iwl_enable_interrupts(struct iwl_priv *priv)
1507 {
1508         IWL_DEBUG_ISR(priv, "Enabling interrupts\n");
1509         set_bit(STATUS_INT_ENABLED, &priv->status);
1510         iwl_write32(priv, CSR_INT_MASK, priv->inta_mask);
1511 }
1512 EXPORT_SYMBOL(iwl_enable_interrupts);
1513
1514
1515 #define ICT_COUNT (PAGE_SIZE/sizeof(u32))
1516
1517 /* Free dram table */
1518 void iwl_free_isr_ict(struct iwl_priv *priv)
1519 {
1520         if (priv->ict_tbl_vir) {
1521                 pci_free_consistent(priv->pci_dev, (sizeof(u32) * ICT_COUNT) +
1522                                         PAGE_SIZE, priv->ict_tbl_vir,
1523                                         priv->ict_tbl_dma);
1524                 priv->ict_tbl_vir = NULL;
1525         }
1526 }
1527 EXPORT_SYMBOL(iwl_free_isr_ict);
1528
1529
1530 /* allocate dram shared table it is a PAGE_SIZE aligned
1531  * also reset all data related to ICT table interrupt.
1532  */
1533 int iwl_alloc_isr_ict(struct iwl_priv *priv)
1534 {
1535
1536         if (priv->cfg->use_isr_legacy)
1537                 return 0;
1538         /* allocate shrared data table */
1539         priv->ict_tbl_vir = pci_alloc_consistent(priv->pci_dev, (sizeof(u32) *
1540                                                   ICT_COUNT) + PAGE_SIZE,
1541                                                   &priv->ict_tbl_dma);
1542         if (!priv->ict_tbl_vir)
1543                 return -ENOMEM;
1544
1545         /* align table to PAGE_SIZE boundry */
1546         priv->aligned_ict_tbl_dma = ALIGN(priv->ict_tbl_dma, PAGE_SIZE);
1547
1548         IWL_DEBUG_ISR(priv, "ict dma addr %Lx dma aligned %Lx diff %d\n",
1549                              (unsigned long long)priv->ict_tbl_dma,
1550                              (unsigned long long)priv->aligned_ict_tbl_dma,
1551                         (int)(priv->aligned_ict_tbl_dma - priv->ict_tbl_dma));
1552
1553         priv->ict_tbl =  priv->ict_tbl_vir +
1554                           (priv->aligned_ict_tbl_dma - priv->ict_tbl_dma);
1555
1556         IWL_DEBUG_ISR(priv, "ict vir addr %p vir aligned %p diff %d\n",
1557                              priv->ict_tbl, priv->ict_tbl_vir,
1558                         (int)(priv->aligned_ict_tbl_dma - priv->ict_tbl_dma));
1559
1560         /* reset table and index to all 0 */
1561         memset(priv->ict_tbl_vir,0, (sizeof(u32) * ICT_COUNT) + PAGE_SIZE);
1562         priv->ict_index = 0;
1563
1564         /* add periodic RX interrupt */
1565         priv->inta_mask |= CSR_INT_BIT_RX_PERIODIC;
1566         return 0;
1567 }
1568 EXPORT_SYMBOL(iwl_alloc_isr_ict);
1569
1570 /* Device is going up inform it about using ICT interrupt table,
1571  * also we need to tell the driver to start using ICT interrupt.
1572  */
1573 int iwl_reset_ict(struct iwl_priv *priv)
1574 {
1575         u32 val;
1576         unsigned long flags;
1577
1578         if (!priv->ict_tbl_vir)
1579                 return 0;
1580
1581         spin_lock_irqsave(&priv->lock, flags);
1582         iwl_disable_interrupts(priv);
1583
1584         memset(&priv->ict_tbl[0],0, sizeof(u32) * ICT_COUNT);
1585
1586         val = priv->aligned_ict_tbl_dma >> PAGE_SHIFT;
1587
1588         val |= CSR_DRAM_INT_TBL_ENABLE;
1589         val |= CSR_DRAM_INIT_TBL_WRAP_CHECK;
1590
1591         IWL_DEBUG_ISR(priv, "CSR_DRAM_INT_TBL_REG =0x%X "
1592                         "aligned dma address %Lx\n",
1593                         val, (unsigned long long)priv->aligned_ict_tbl_dma);
1594
1595         iwl_write32(priv, CSR_DRAM_INT_TBL_REG, val);
1596         priv->use_ict = true;
1597         priv->ict_index = 0;
1598         iwl_write32(priv, CSR_INT, priv->inta_mask);
1599         iwl_enable_interrupts(priv);
1600         spin_unlock_irqrestore(&priv->lock, flags);
1601
1602         return 0;
1603 }
1604 EXPORT_SYMBOL(iwl_reset_ict);
1605
1606 /* Device is going down disable ict interrupt usage */
1607 void iwl_disable_ict(struct iwl_priv *priv)
1608 {
1609         unsigned long flags;
1610
1611         spin_lock_irqsave(&priv->lock, flags);
1612         priv->use_ict = false;
1613         spin_unlock_irqrestore(&priv->lock, flags);
1614 }
1615 EXPORT_SYMBOL(iwl_disable_ict);
1616
1617 /* interrupt handler using ict table, with this interrupt driver will
1618  * stop using INTA register to get device's interrupt, reading this register
1619  * is expensive, device will write interrupts in ICT dram table, increment
1620  * index then will fire interrupt to driver, driver will OR all ICT table
1621  * entries from current index up to table entry with 0 value. the result is
1622  * the interrupt we need to service, driver will set the entries back to 0 and
1623  * set index.
1624  */
1625 irqreturn_t iwl_isr_ict(int irq, void *data)
1626 {
1627         struct iwl_priv *priv = data;
1628         u32 inta, inta_mask;
1629         u32 val = 0;
1630
1631         if (!priv)
1632                 return IRQ_NONE;
1633
1634         /* dram interrupt table not set yet,
1635          * use legacy interrupt.
1636          */
1637         if (!priv->use_ict)
1638                 return iwl_isr(irq, data);
1639
1640         spin_lock(&priv->lock);
1641
1642         /* Disable (but don't clear!) interrupts here to avoid
1643          * back-to-back ISRs and sporadic interrupts from our NIC.
1644          * If we have something to service, the tasklet will re-enable ints.
1645          * If we *don't* have something, we'll re-enable before leaving here.
1646          */
1647         inta_mask = iwl_read32(priv, CSR_INT_MASK);  /* just for debug */
1648         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
1649
1650
1651         /* Ignore interrupt if there's nothing in NIC to service.
1652          * This may be due to IRQ shared with another device,
1653          * or due to sporadic interrupts thrown from our NIC. */
1654         if (!priv->ict_tbl[priv->ict_index]) {
1655                 IWL_DEBUG_ISR(priv, "Ignore interrupt, inta == 0\n");
1656                 goto none;
1657         }
1658
1659         /* read all entries that not 0 start with ict_index */
1660         while (priv->ict_tbl[priv->ict_index]) {
1661
1662                 val |= priv->ict_tbl[priv->ict_index];
1663                 IWL_DEBUG_ISR(priv, "ICT index %d value 0x%08X\n",
1664                                         priv->ict_index,
1665                                         priv->ict_tbl[priv->ict_index]);
1666                 priv->ict_tbl[priv->ict_index] = 0;
1667                 priv->ict_index = iwl_queue_inc_wrap(priv->ict_index,
1668                                                                 ICT_COUNT);
1669
1670         }
1671
1672         /* We should not get this value, just ignore it. */
1673         if (val == 0xffffffff)
1674                 val = 0;
1675
1676         inta = (0xff & val) | ((0xff00 & val) << 16);
1677         IWL_DEBUG_ISR(priv, "ISR inta 0x%08x, enabled 0x%08x ict 0x%08x\n",
1678                         inta, inta_mask, val);
1679
1680         inta &= priv->inta_mask;
1681         priv->inta |= inta;
1682
1683         /* iwl_irq_tasklet() will service interrupts and re-enable them */
1684         if (likely(inta))
1685                 tasklet_schedule(&priv->irq_tasklet);
1686         else if (test_bit(STATUS_INT_ENABLED, &priv->status) && !priv->inta) {
1687                 /* Allow interrupt if was disabled by this handler and
1688                  * no tasklet was schedules, We should not enable interrupt,
1689                  * tasklet will enable it.
1690                  */
1691                 iwl_enable_interrupts(priv);
1692         }
1693
1694         spin_unlock(&priv->lock);
1695         return IRQ_HANDLED;
1696
1697  none:
1698         /* re-enable interrupts here since we don't have anything to service.
1699          * only Re-enable if disabled by irq.
1700          */
1701         if (test_bit(STATUS_INT_ENABLED, &priv->status) && !priv->inta)
1702                 iwl_enable_interrupts(priv);
1703
1704         spin_unlock(&priv->lock);
1705         return IRQ_NONE;
1706 }
1707 EXPORT_SYMBOL(iwl_isr_ict);
1708
1709
1710 static irqreturn_t iwl_isr(int irq, void *data)
1711 {
1712         struct iwl_priv *priv = data;
1713         u32 inta, inta_mask;
1714 #ifdef CONFIG_IWLWIFI_DEBUG
1715         u32 inta_fh;
1716 #endif
1717         if (!priv)
1718                 return IRQ_NONE;
1719
1720         spin_lock(&priv->lock);
1721
1722         /* Disable (but don't clear!) interrupts here to avoid
1723          *    back-to-back ISRs and sporadic interrupts from our NIC.
1724          * If we have something to service, the tasklet will re-enable ints.
1725          * If we *don't* have something, we'll re-enable before leaving here. */
1726         inta_mask = iwl_read32(priv, CSR_INT_MASK);  /* just for debug */
1727         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
1728
1729         /* Discover which interrupts are active/pending */
1730         inta = iwl_read32(priv, CSR_INT);
1731
1732         /* Ignore interrupt if there's nothing in NIC to service.
1733          * This may be due to IRQ shared with another device,
1734          * or due to sporadic interrupts thrown from our NIC. */
1735         if (!inta) {
1736                 IWL_DEBUG_ISR(priv, "Ignore interrupt, inta == 0\n");
1737                 goto none;
1738         }
1739
1740         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
1741                 /* Hardware disappeared. It might have already raised
1742                  * an interrupt */
1743                 IWL_WARN(priv, "HARDWARE GONE?? INTA == 0x%08x\n", inta);
1744                 goto unplugged;
1745         }
1746
1747 #ifdef CONFIG_IWLWIFI_DEBUG
1748         if (priv->debug_level & (IWL_DL_ISR)) {
1749                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1750                 IWL_DEBUG_ISR(priv, "ISR inta 0x%08x, enabled 0x%08x, "
1751                               "fh 0x%08x\n", inta, inta_mask, inta_fh);
1752         }
1753 #endif
1754
1755         priv->inta |= inta;
1756         /* iwl_irq_tasklet() will service interrupts and re-enable them */
1757         if (likely(inta))
1758                 tasklet_schedule(&priv->irq_tasklet);
1759         else if (test_bit(STATUS_INT_ENABLED, &priv->status) && !priv->inta)
1760                 iwl_enable_interrupts(priv);
1761
1762  unplugged:
1763         spin_unlock(&priv->lock);
1764         return IRQ_HANDLED;
1765
1766  none:
1767         /* re-enable interrupts here since we don't have anything to service. */
1768         /* only Re-enable if diabled by irq  and no schedules tasklet. */
1769         if (test_bit(STATUS_INT_ENABLED, &priv->status) && !priv->inta)
1770                 iwl_enable_interrupts(priv);
1771
1772         spin_unlock(&priv->lock);
1773         return IRQ_NONE;
1774 }
1775
1776 irqreturn_t iwl_isr_legacy(int irq, void *data)
1777 {
1778         struct iwl_priv *priv = data;
1779         u32 inta, inta_mask;
1780         u32 inta_fh;
1781         if (!priv)
1782                 return IRQ_NONE;
1783
1784         spin_lock(&priv->lock);
1785
1786         /* Disable (but don't clear!) interrupts here to avoid
1787          *    back-to-back ISRs and sporadic interrupts from our NIC.
1788          * If we have something to service, the tasklet will re-enable ints.
1789          * If we *don't* have something, we'll re-enable before leaving here. */
1790         inta_mask = iwl_read32(priv, CSR_INT_MASK);  /* just for debug */
1791         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
1792
1793         /* Discover which interrupts are active/pending */
1794         inta = iwl_read32(priv, CSR_INT);
1795         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1796
1797         /* Ignore interrupt if there's nothing in NIC to service.
1798          * This may be due to IRQ shared with another device,
1799          * or due to sporadic interrupts thrown from our NIC. */
1800         if (!inta && !inta_fh) {
1801                 IWL_DEBUG_ISR(priv, "Ignore interrupt, inta == 0, inta_fh == 0\n");
1802                 goto none;
1803         }
1804
1805         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
1806                 /* Hardware disappeared. It might have already raised
1807                  * an interrupt */
1808                 IWL_WARN(priv, "HARDWARE GONE?? INTA == 0x%08x\n", inta);
1809                 goto unplugged;
1810         }
1811
1812         IWL_DEBUG_ISR(priv, "ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1813                       inta, inta_mask, inta_fh);
1814
1815         inta &= ~CSR_INT_BIT_SCD;
1816
1817         /* iwl_irq_tasklet() will service interrupts and re-enable them */
1818         if (likely(inta || inta_fh))
1819                 tasklet_schedule(&priv->irq_tasklet);
1820
1821  unplugged:
1822         spin_unlock(&priv->lock);
1823         return IRQ_HANDLED;
1824
1825  none:
1826         /* re-enable interrupts here since we don't have anything to service. */
1827         /* only Re-enable if diabled by irq */
1828         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1829                 iwl_enable_interrupts(priv);
1830         spin_unlock(&priv->lock);
1831         return IRQ_NONE;
1832 }
1833 EXPORT_SYMBOL(iwl_isr_legacy);
1834
1835 int iwl_send_bt_config(struct iwl_priv *priv)
1836 {
1837         struct iwl_bt_cmd bt_cmd = {
1838                 .flags = 3,
1839                 .lead_time = 0xAA,
1840                 .max_kill = 1,
1841                 .kill_ack_mask = 0,
1842                 .kill_cts_mask = 0,
1843         };
1844
1845         return iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG,
1846                                 sizeof(struct iwl_bt_cmd), &bt_cmd);
1847 }
1848 EXPORT_SYMBOL(iwl_send_bt_config);
1849
1850 int iwl_send_statistics_request(struct iwl_priv *priv, u8 flags)
1851 {
1852         u32 stat_flags = 0;
1853         struct iwl_host_cmd cmd = {
1854                 .id = REPLY_STATISTICS_CMD,
1855                 .meta.flags = flags,
1856                 .len = sizeof(stat_flags),
1857                 .data = (u8 *) &stat_flags,
1858         };
1859         return iwl_send_cmd(priv, &cmd);
1860 }
1861 EXPORT_SYMBOL(iwl_send_statistics_request);
1862
1863 /**
1864  * iwl_verify_inst_sparse - verify runtime uCode image in card vs. host,
1865  *   using sample data 100 bytes apart.  If these sample points are good,
1866  *   it's a pretty good bet that everything between them is good, too.
1867  */
1868 static int iwlcore_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
1869 {
1870         u32 val;
1871         int ret = 0;
1872         u32 errcnt = 0;
1873         u32 i;
1874
1875         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
1876
1877         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
1878                 /* read data comes through single port, auto-incr addr */
1879                 /* NOTE: Use the debugless read so we don't flood kernel log
1880                  * if IWL_DL_IO is set */
1881                 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
1882                         i + IWL49_RTC_INST_LOWER_BOUND);
1883                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1884                 if (val != le32_to_cpu(*image)) {
1885                         ret = -EIO;
1886                         errcnt++;
1887                         if (errcnt >= 3)
1888                                 break;
1889                 }
1890         }
1891
1892         return ret;
1893 }
1894
1895 /**
1896  * iwlcore_verify_inst_full - verify runtime uCode image in card vs. host,
1897  *     looking at all data.
1898  */
1899 static int iwl_verify_inst_full(struct iwl_priv *priv, __le32 *image,
1900                                  u32 len)
1901 {
1902         u32 val;
1903         u32 save_len = len;
1904         int ret = 0;
1905         u32 errcnt;
1906
1907         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
1908
1909         iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
1910                            IWL49_RTC_INST_LOWER_BOUND);
1911
1912         errcnt = 0;
1913         for (; len > 0; len -= sizeof(u32), image++) {
1914                 /* read data comes through single port, auto-incr addr */
1915                 /* NOTE: Use the debugless read so we don't flood kernel log
1916                  * if IWL_DL_IO is set */
1917                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1918                 if (val != le32_to_cpu(*image)) {
1919                         IWL_ERR(priv, "uCode INST section is invalid at "
1920                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
1921                                   save_len - len, val, le32_to_cpu(*image));
1922                         ret = -EIO;
1923                         errcnt++;
1924                         if (errcnt >= 20)
1925                                 break;
1926                 }
1927         }
1928
1929         if (!errcnt)
1930                 IWL_DEBUG_INFO(priv,
1931                     "ucode image in INSTRUCTION memory is good\n");
1932
1933         return ret;
1934 }
1935
1936 /**
1937  * iwl_verify_ucode - determine which instruction image is in SRAM,
1938  *    and verify its contents
1939  */
1940 int iwl_verify_ucode(struct iwl_priv *priv)
1941 {
1942         __le32 *image;
1943         u32 len;
1944         int ret;
1945
1946         /* Try bootstrap */
1947         image = (__le32 *)priv->ucode_boot.v_addr;
1948         len = priv->ucode_boot.len;
1949         ret = iwlcore_verify_inst_sparse(priv, image, len);
1950         if (!ret) {
1951                 IWL_DEBUG_INFO(priv, "Bootstrap uCode is good in inst SRAM\n");
1952                 return 0;
1953         }
1954
1955         /* Try initialize */
1956         image = (__le32 *)priv->ucode_init.v_addr;
1957         len = priv->ucode_init.len;
1958         ret = iwlcore_verify_inst_sparse(priv, image, len);
1959         if (!ret) {
1960                 IWL_DEBUG_INFO(priv, "Initialize uCode is good in inst SRAM\n");
1961                 return 0;
1962         }
1963
1964         /* Try runtime/protocol */
1965         image = (__le32 *)priv->ucode_code.v_addr;
1966         len = priv->ucode_code.len;
1967         ret = iwlcore_verify_inst_sparse(priv, image, len);
1968         if (!ret) {
1969                 IWL_DEBUG_INFO(priv, "Runtime uCode is good in inst SRAM\n");
1970                 return 0;
1971         }
1972
1973         IWL_ERR(priv, "NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
1974
1975         /* Since nothing seems to match, show first several data entries in
1976          * instruction SRAM, so maybe visual inspection will give a clue.
1977          * Selection of bootstrap image (vs. other images) is arbitrary. */
1978         image = (__le32 *)priv->ucode_boot.v_addr;
1979         len = priv->ucode_boot.len;
1980         ret = iwl_verify_inst_full(priv, image, len);
1981
1982         return ret;
1983 }
1984 EXPORT_SYMBOL(iwl_verify_ucode);
1985
1986
1987 static const char *desc_lookup_text[] = {
1988         "OK",
1989         "FAIL",
1990         "BAD_PARAM",
1991         "BAD_CHECKSUM",
1992         "NMI_INTERRUPT_WDG",
1993         "SYSASSERT",
1994         "FATAL_ERROR",
1995         "BAD_COMMAND",
1996         "HW_ERROR_TUNE_LOCK",
1997         "HW_ERROR_TEMPERATURE",
1998         "ILLEGAL_CHAN_FREQ",
1999         "VCC_NOT_STABLE",
2000         "FH_ERROR",
2001         "NMI_INTERRUPT_HOST",
2002         "NMI_INTERRUPT_ACTION_PT",
2003         "NMI_INTERRUPT_UNKNOWN",
2004         "UCODE_VERSION_MISMATCH",
2005         "HW_ERROR_ABS_LOCK",
2006         "HW_ERROR_CAL_LOCK_FAIL",
2007         "NMI_INTERRUPT_INST_ACTION_PT",
2008         "NMI_INTERRUPT_DATA_ACTION_PT",
2009         "NMI_TRM_HW_ER",
2010         "NMI_INTERRUPT_TRM",
2011         "NMI_INTERRUPT_BREAK_POINT"
2012         "DEBUG_0",
2013         "DEBUG_1",
2014         "DEBUG_2",
2015         "DEBUG_3",
2016         "UNKNOWN"
2017 };
2018
2019 static const char *desc_lookup(int i)
2020 {
2021         int max = ARRAY_SIZE(desc_lookup_text) - 1;
2022
2023         if (i < 0 || i > max)
2024                 i = max;
2025
2026         return desc_lookup_text[i];
2027 }
2028
2029 #define ERROR_START_OFFSET  (1 * sizeof(u32))
2030 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
2031
2032 void iwl_dump_nic_error_log(struct iwl_priv *priv)
2033 {
2034         u32 data2, line;
2035         u32 desc, time, count, base, data1;
2036         u32 blink1, blink2, ilink1, ilink2;
2037
2038         if (priv->ucode_type == UCODE_INIT)
2039                 base = le32_to_cpu(priv->card_alive_init.error_event_table_ptr);
2040         else
2041                 base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
2042
2043         if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
2044                 IWL_ERR(priv, "Not valid error log pointer 0x%08X\n", base);
2045                 return;
2046         }
2047
2048         count = iwl_read_targ_mem(priv, base);
2049
2050         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
2051                 IWL_ERR(priv, "Start IWL Error Log Dump:\n");
2052                 IWL_ERR(priv, "Status: 0x%08lX, count: %d\n",
2053                         priv->status, count);
2054         }
2055
2056         desc = iwl_read_targ_mem(priv, base + 1 * sizeof(u32));
2057         blink1 = iwl_read_targ_mem(priv, base + 3 * sizeof(u32));
2058         blink2 = iwl_read_targ_mem(priv, base + 4 * sizeof(u32));
2059         ilink1 = iwl_read_targ_mem(priv, base + 5 * sizeof(u32));
2060         ilink2 = iwl_read_targ_mem(priv, base + 6 * sizeof(u32));
2061         data1 = iwl_read_targ_mem(priv, base + 7 * sizeof(u32));
2062         data2 = iwl_read_targ_mem(priv, base + 8 * sizeof(u32));
2063         line = iwl_read_targ_mem(priv, base + 9 * sizeof(u32));
2064         time = iwl_read_targ_mem(priv, base + 11 * sizeof(u32));
2065
2066         IWL_ERR(priv, "Desc                               Time       "
2067                 "data1      data2      line\n");
2068         IWL_ERR(priv, "%-28s (#%02d) %010u 0x%08X 0x%08X %u\n",
2069                 desc_lookup(desc), desc, time, data1, data2, line);
2070         IWL_ERR(priv, "blink1  blink2  ilink1  ilink2\n");
2071         IWL_ERR(priv, "0x%05X 0x%05X 0x%05X 0x%05X\n", blink1, blink2,
2072                 ilink1, ilink2);
2073
2074 }
2075 EXPORT_SYMBOL(iwl_dump_nic_error_log);
2076
2077 #define EVENT_START_OFFSET  (4 * sizeof(u32))
2078
2079 /**
2080  * iwl_print_event_log - Dump error event log to syslog
2081  *
2082  */
2083 static void iwl_print_event_log(struct iwl_priv *priv, u32 start_idx,
2084                                 u32 num_events, u32 mode)
2085 {
2086         u32 i;
2087         u32 base;       /* SRAM byte address of event log header */
2088         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
2089         u32 ptr;        /* SRAM byte address of log data */
2090         u32 ev, time, data; /* event log data */
2091
2092         if (num_events == 0)
2093                 return;
2094         if (priv->ucode_type == UCODE_INIT)
2095                 base = le32_to_cpu(priv->card_alive_init.log_event_table_ptr);
2096         else
2097                 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
2098
2099         if (mode == 0)
2100                 event_size = 2 * sizeof(u32);
2101         else
2102                 event_size = 3 * sizeof(u32);
2103
2104         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
2105
2106         /* "time" is actually "data" for mode 0 (no timestamp).
2107         * place event id # at far right for easier visual parsing. */
2108         for (i = 0; i < num_events; i++) {
2109                 ev = iwl_read_targ_mem(priv, ptr);
2110                 ptr += sizeof(u32);
2111                 time = iwl_read_targ_mem(priv, ptr);
2112                 ptr += sizeof(u32);
2113                 if (mode == 0) {
2114                         /* data, ev */
2115                         IWL_ERR(priv, "EVT_LOG:0x%08x:%04u\n", time, ev);
2116                 } else {
2117                         data = iwl_read_targ_mem(priv, ptr);
2118                         ptr += sizeof(u32);
2119                         IWL_ERR(priv, "EVT_LOGT:%010u:0x%08x:%04u\n",
2120                                         time, data, ev);
2121                 }
2122         }
2123 }
2124
2125 void iwl_dump_nic_event_log(struct iwl_priv *priv)
2126 {
2127         u32 base;       /* SRAM byte address of event log header */
2128         u32 capacity;   /* event log capacity in # entries */
2129         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
2130         u32 num_wraps;  /* # times uCode wrapped to top of log */
2131         u32 next_entry; /* index of next entry to be written by uCode */
2132         u32 size;       /* # entries that we'll print */
2133
2134         if (priv->ucode_type == UCODE_INIT)
2135                 base = le32_to_cpu(priv->card_alive_init.log_event_table_ptr);
2136         else
2137                 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
2138
2139         if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
2140                 IWL_ERR(priv, "Invalid event log pointer 0x%08X\n", base);
2141                 return;
2142         }
2143
2144         /* event log header */
2145         capacity = iwl_read_targ_mem(priv, base);
2146         mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
2147         num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
2148         next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
2149
2150         size = num_wraps ? capacity : next_entry;
2151
2152         /* bail out if nothing in log */
2153         if (size == 0) {
2154                 IWL_ERR(priv, "Start IWL Event Log Dump: nothing in log\n");
2155                 return;
2156         }
2157
2158         IWL_ERR(priv, "Start IWL Event Log Dump: display count %d, wraps %d\n",
2159                         size, num_wraps);
2160
2161         /* if uCode has wrapped back to top of log, start at the oldest entry,
2162          * i.e the next one that uCode would fill. */
2163         if (num_wraps)
2164                 iwl_print_event_log(priv, next_entry,
2165                                         capacity - next_entry, mode);
2166         /* (then/else) start at top of log */
2167         iwl_print_event_log(priv, 0, next_entry, mode);
2168
2169 }
2170 EXPORT_SYMBOL(iwl_dump_nic_event_log);
2171
2172 void iwl_rf_kill_ct_config(struct iwl_priv *priv)
2173 {
2174         struct iwl_ct_kill_config cmd;
2175         unsigned long flags;
2176         int ret = 0;
2177
2178         spin_lock_irqsave(&priv->lock, flags);
2179         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
2180                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
2181         spin_unlock_irqrestore(&priv->lock, flags);
2182
2183         cmd.critical_temperature_R =
2184                 cpu_to_le32(priv->hw_params.ct_kill_threshold);
2185
2186         ret = iwl_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD,
2187                                sizeof(cmd), &cmd);
2188         if (ret)
2189                 IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
2190         else
2191                 IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD succeeded, "
2192                         "critical temperature is %d\n",
2193                         cmd.critical_temperature_R);
2194 }
2195 EXPORT_SYMBOL(iwl_rf_kill_ct_config);
2196
2197
2198 /*
2199  * CARD_STATE_CMD
2200  *
2201  * Use: Sets the device's internal card state to enable, disable, or halt
2202  *
2203  * When in the 'enable' state the card operates as normal.
2204  * When in the 'disable' state, the card enters into a low power mode.
2205  * When in the 'halt' state, the card is shut down and must be fully
2206  * restarted to come back on.
2207  */
2208 int iwl_send_card_state(struct iwl_priv *priv, u32 flags, u8 meta_flag)
2209 {
2210         struct iwl_host_cmd cmd = {
2211                 .id = REPLY_CARD_STATE_CMD,
2212                 .len = sizeof(u32),
2213                 .data = &flags,
2214                 .meta.flags = meta_flag,
2215         };
2216
2217         return iwl_send_cmd(priv, &cmd);
2218 }
2219 EXPORT_SYMBOL(iwl_send_card_state);
2220
2221 void iwl_rx_pm_sleep_notif(struct iwl_priv *priv,
2222                            struct iwl_rx_mem_buffer *rxb)
2223 {
2224 #ifdef CONFIG_IWLWIFI_DEBUG
2225         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2226         struct iwl_sleep_notification *sleep = &(pkt->u.sleep_notif);
2227         IWL_DEBUG_RX(priv, "sleep mode: %d, src: %d\n",
2228                      sleep->pm_sleep_mode, sleep->pm_wakeup_src);
2229 #endif
2230 }
2231 EXPORT_SYMBOL(iwl_rx_pm_sleep_notif);
2232
2233 void iwl_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
2234                                       struct iwl_rx_mem_buffer *rxb)
2235 {
2236         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2237         IWL_DEBUG_RADIO(priv, "Dumping %d bytes of unhandled "
2238                         "notification for %s:\n",
2239                         le32_to_cpu(pkt->len), get_cmd_string(pkt->hdr.cmd));
2240         iwl_print_hex_dump(priv, IWL_DL_RADIO, pkt->u.raw, le32_to_cpu(pkt->len));
2241 }
2242 EXPORT_SYMBOL(iwl_rx_pm_debug_statistics_notif);
2243
2244 void iwl_rx_reply_error(struct iwl_priv *priv,
2245                         struct iwl_rx_mem_buffer *rxb)
2246 {
2247         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2248
2249         IWL_ERR(priv, "Error Reply type 0x%08X cmd %s (0x%02X) "
2250                 "seq 0x%04X ser 0x%08X\n",
2251                 le32_to_cpu(pkt->u.err_resp.error_type),
2252                 get_cmd_string(pkt->u.err_resp.cmd_id),
2253                 pkt->u.err_resp.cmd_id,
2254                 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
2255                 le32_to_cpu(pkt->u.err_resp.error_info));
2256 }
2257 EXPORT_SYMBOL(iwl_rx_reply_error);
2258
2259 void iwl_clear_isr_stats(struct iwl_priv *priv)
2260 {
2261         memset(&priv->isr_stats, 0, sizeof(priv->isr_stats));
2262 }
2263 EXPORT_SYMBOL(iwl_clear_isr_stats);
2264
2265 int iwl_mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
2266                            const struct ieee80211_tx_queue_params *params)
2267 {
2268         struct iwl_priv *priv = hw->priv;
2269         unsigned long flags;
2270         int q;
2271
2272         IWL_DEBUG_MAC80211(priv, "enter\n");
2273
2274         if (!iwl_is_ready_rf(priv)) {
2275                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
2276                 return -EIO;
2277         }
2278
2279         if (queue >= AC_NUM) {
2280                 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
2281                 return 0;
2282         }
2283
2284         q = AC_NUM - 1 - queue;
2285
2286         spin_lock_irqsave(&priv->lock, flags);
2287
2288         priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
2289         priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
2290         priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
2291         priv->qos_data.def_qos_parm.ac[q].edca_txop =
2292                         cpu_to_le16((params->txop * 32));
2293
2294         priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
2295         priv->qos_data.qos_active = 1;
2296
2297         if (priv->iw_mode == NL80211_IFTYPE_AP)
2298                 iwl_activate_qos(priv, 1);
2299         else if (priv->assoc_id && iwl_is_associated(priv))
2300                 iwl_activate_qos(priv, 0);
2301
2302         spin_unlock_irqrestore(&priv->lock, flags);
2303
2304         IWL_DEBUG_MAC80211(priv, "leave\n");
2305         return 0;
2306 }
2307 EXPORT_SYMBOL(iwl_mac_conf_tx);
2308
2309 static void iwl_ht_conf(struct iwl_priv *priv,
2310                             struct ieee80211_bss_conf *bss_conf)
2311 {
2312         struct ieee80211_sta_ht_cap *ht_conf;
2313         struct iwl_ht_info *iwl_conf = &priv->current_ht_config;
2314         struct ieee80211_sta *sta;
2315
2316         IWL_DEBUG_MAC80211(priv, "enter: \n");
2317
2318         if (!iwl_conf->is_ht)
2319                 return;
2320
2321
2322         /*
2323          * It is totally wrong to base global information on something
2324          * that is valid only when associated, alas, this driver works
2325          * that way and I don't know how to fix it.
2326          */
2327
2328         rcu_read_lock();
2329         sta = ieee80211_find_sta(priv->hw, priv->bssid);
2330         if (!sta) {
2331                 rcu_read_unlock();
2332                 return;
2333         }
2334         ht_conf = &sta->ht_cap;
2335
2336         if (ht_conf->cap & IEEE80211_HT_CAP_SGI_20)
2337                 iwl_conf->sgf |= HT_SHORT_GI_20MHZ;
2338         if (ht_conf->cap & IEEE80211_HT_CAP_SGI_40)
2339                 iwl_conf->sgf |= HT_SHORT_GI_40MHZ;
2340
2341         iwl_conf->is_green_field = !!(ht_conf->cap & IEEE80211_HT_CAP_GRN_FLD);
2342         iwl_conf->max_amsdu_size =
2343                 !!(ht_conf->cap & IEEE80211_HT_CAP_MAX_AMSDU);
2344
2345         iwl_conf->supported_chan_width =
2346                 !!(ht_conf->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40);
2347
2348         /*
2349          * XXX: The HT configuration needs to be moved into iwl_mac_config()
2350          *      to be done there correctly.
2351          */
2352
2353         iwl_conf->extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE;
2354         if (conf_is_ht40_minus(&priv->hw->conf))
2355                 iwl_conf->extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2356         else if (conf_is_ht40_plus(&priv->hw->conf))
2357                 iwl_conf->extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2358
2359         /* If no above or below channel supplied disable FAT channel */
2360         if (iwl_conf->extension_chan_offset != IEEE80211_HT_PARAM_CHA_SEC_ABOVE &&
2361             iwl_conf->extension_chan_offset != IEEE80211_HT_PARAM_CHA_SEC_BELOW)
2362                 iwl_conf->supported_chan_width = 0;
2363
2364         iwl_conf->sm_ps = (u8)((ht_conf->cap & IEEE80211_HT_CAP_SM_PS) >> 2);
2365
2366         memcpy(&iwl_conf->mcs, &ht_conf->mcs, 16);
2367
2368         iwl_conf->tx_chan_width = iwl_conf->supported_chan_width != 0;
2369         iwl_conf->ht_protection =
2370                 bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_PROTECTION;
2371         iwl_conf->non_GF_STA_present =
2372                 !!(bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
2373
2374         rcu_read_unlock();
2375
2376         IWL_DEBUG_MAC80211(priv, "leave\n");
2377 }
2378
2379 #define IWL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6)
2380 void iwl_bss_info_changed(struct ieee80211_hw *hw,
2381                           struct ieee80211_vif *vif,
2382                           struct ieee80211_bss_conf *bss_conf,
2383                           u32 changes)
2384 {
2385         struct iwl_priv *priv = hw->priv;
2386         int ret;
2387
2388         IWL_DEBUG_MAC80211(priv, "changes = 0x%X\n", changes);
2389
2390         if (!iwl_is_alive(priv))
2391                 return;
2392
2393         mutex_lock(&priv->mutex);
2394
2395         if (changes & BSS_CHANGED_BEACON &&
2396             priv->iw_mode == NL80211_IFTYPE_AP) {
2397                 dev_kfree_skb(priv->ibss_beacon);
2398                 priv->ibss_beacon = ieee80211_beacon_get(hw, vif);
2399         }
2400
2401         if (changes & BSS_CHANGED_BEACON_INT) {
2402                 priv->beacon_int = bss_conf->beacon_int;
2403                 /* TODO: in AP mode, do something to make this take effect */
2404         }
2405
2406         if (changes & BSS_CHANGED_BSSID) {
2407                 IWL_DEBUG_MAC80211(priv, "BSSID %pM\n", bss_conf->bssid);
2408
2409                 /*
2410                  * If there is currently a HW scan going on in the
2411                  * background then we need to cancel it else the RXON
2412                  * below/in post_associate will fail.
2413                  */
2414                 if (iwl_scan_cancel_timeout(priv, 100)) {
2415                         IWL_WARN(priv, "Aborted scan still in progress after 100ms\n");
2416                         IWL_DEBUG_MAC80211(priv, "leaving - scan abort failed.\n");
2417                         mutex_unlock(&priv->mutex);
2418                         return;
2419                 }
2420
2421                 /* mac80211 only sets assoc when in STATION mode */
2422                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC ||
2423                     bss_conf->assoc) {
2424                         memcpy(priv->staging_rxon.bssid_addr,
2425                                bss_conf->bssid, ETH_ALEN);
2426
2427                         /* currently needed in a few places */
2428                         memcpy(priv->bssid, bss_conf->bssid, ETH_ALEN);
2429                 } else {
2430                         priv->staging_rxon.filter_flags &=
2431                                 ~RXON_FILTER_ASSOC_MSK;
2432                 }
2433
2434         }
2435
2436         /*
2437          * This needs to be after setting the BSSID in case
2438          * mac80211 decides to do both changes at once because
2439          * it will invoke post_associate.
2440          */
2441         if (priv->iw_mode == NL80211_IFTYPE_ADHOC &&
2442             changes & BSS_CHANGED_BEACON) {
2443                 struct sk_buff *beacon = ieee80211_beacon_get(hw, vif);
2444
2445                 if (beacon)
2446                         iwl_mac_beacon_update(hw, beacon);
2447         }
2448
2449         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
2450                 IWL_DEBUG_MAC80211(priv, "ERP_PREAMBLE %d\n",
2451                                    bss_conf->use_short_preamble);
2452                 if (bss_conf->use_short_preamble)
2453                         priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2454                 else
2455                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2456         }
2457
2458         if (changes & BSS_CHANGED_ERP_CTS_PROT) {
2459                 IWL_DEBUG_MAC80211(priv, "ERP_CTS %d\n", bss_conf->use_cts_prot);
2460                 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
2461                         priv->staging_rxon.flags |= RXON_FLG_TGG_PROTECT_MSK;
2462                 else
2463                         priv->staging_rxon.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
2464         }
2465
2466         if (changes & BSS_CHANGED_BASIC_RATES) {
2467                 /* XXX use this information
2468                  *
2469                  * To do that, remove code from iwl_set_rate() and put something
2470                  * like this here:
2471                  *
2472                 if (A-band)
2473                         priv->staging_rxon.ofdm_basic_rates =
2474                                 bss_conf->basic_rates;
2475                 else
2476                         priv->staging_rxon.ofdm_basic_rates =
2477                                 bss_conf->basic_rates >> 4;
2478                         priv->staging_rxon.cck_basic_rates =
2479                                 bss_conf->basic_rates & 0xF;
2480                  */
2481         }
2482
2483         if (changes & BSS_CHANGED_HT) {
2484                 iwl_ht_conf(priv, bss_conf);
2485
2486                 if (priv->cfg->ops->hcmd->set_rxon_chain)
2487                         priv->cfg->ops->hcmd->set_rxon_chain(priv);
2488         }
2489
2490         if (changes & BSS_CHANGED_ASSOC) {
2491                 IWL_DEBUG_MAC80211(priv, "ASSOC %d\n", bss_conf->assoc);
2492                 if (bss_conf->assoc) {
2493                         priv->assoc_id = bss_conf->aid;
2494                         priv->beacon_int = bss_conf->beacon_int;
2495                         priv->power_data.dtim_period = bss_conf->dtim_period;
2496                         priv->timestamp = bss_conf->timestamp;
2497                         priv->assoc_capability = bss_conf->assoc_capability;
2498
2499                         /*
2500                          * We have just associated, don't start scan too early
2501                          * leave time for EAPOL exchange to complete.
2502                          *
2503                          * XXX: do this in mac80211
2504                          */
2505                         priv->next_scan_jiffies = jiffies +
2506                                         IWL_DELAY_NEXT_SCAN_AFTER_ASSOC;
2507                         if (!iwl_is_rfkill(priv))
2508                                 priv->cfg->ops->lib->post_associate(priv);
2509                 } else
2510                         priv->assoc_id = 0;
2511
2512         }
2513
2514         if (changes && iwl_is_associated(priv) && priv->assoc_id) {
2515                 IWL_DEBUG_MAC80211(priv, "Changes (%#x) while associated\n",
2516                                    changes);
2517                 ret = iwl_send_rxon_assoc(priv);
2518                 if (!ret) {
2519                         /* Sync active_rxon with latest change. */
2520                         memcpy((void *)&priv->active_rxon,
2521                                 &priv->staging_rxon,
2522                                 sizeof(struct iwl_rxon_cmd));
2523                 }
2524         }
2525
2526         mutex_unlock(&priv->mutex);
2527
2528         IWL_DEBUG_MAC80211(priv, "leave\n");
2529 }
2530 EXPORT_SYMBOL(iwl_bss_info_changed);
2531
2532 int iwl_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb)
2533 {
2534         struct iwl_priv *priv = hw->priv;
2535         unsigned long flags;
2536         __le64 timestamp;
2537
2538         IWL_DEBUG_MAC80211(priv, "enter\n");
2539
2540         if (!iwl_is_ready_rf(priv)) {
2541                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
2542                 return -EIO;
2543         }
2544
2545         if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
2546                 IWL_DEBUG_MAC80211(priv, "leave - not IBSS\n");
2547                 return -EIO;
2548         }
2549
2550         spin_lock_irqsave(&priv->lock, flags);
2551
2552         if (priv->ibss_beacon)
2553                 dev_kfree_skb(priv->ibss_beacon);
2554
2555         priv->ibss_beacon = skb;
2556
2557         priv->assoc_id = 0;
2558         timestamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
2559         priv->timestamp = le64_to_cpu(timestamp);
2560
2561         IWL_DEBUG_MAC80211(priv, "leave\n");
2562         spin_unlock_irqrestore(&priv->lock, flags);
2563
2564         iwl_reset_qos(priv);
2565
2566         priv->cfg->ops->lib->post_associate(priv);
2567
2568
2569         return 0;
2570 }
2571 EXPORT_SYMBOL(iwl_mac_beacon_update);
2572
2573 int iwl_set_mode(struct iwl_priv *priv, int mode)
2574 {
2575         if (mode == NL80211_IFTYPE_ADHOC) {
2576                 const struct iwl_channel_info *ch_info;
2577
2578                 ch_info = iwl_get_channel_info(priv,
2579                         priv->band,
2580                         le16_to_cpu(priv->staging_rxon.channel));
2581
2582                 if (!ch_info || !is_channel_ibss(ch_info)) {
2583                         IWL_ERR(priv, "channel %d not IBSS channel\n",
2584                                   le16_to_cpu(priv->staging_rxon.channel));
2585                         return -EINVAL;
2586                 }
2587         }
2588
2589         iwl_connection_init_rx_config(priv, mode);
2590
2591         if (priv->cfg->ops->hcmd->set_rxon_chain)
2592                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
2593
2594         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2595
2596         iwl_clear_stations_table(priv);
2597
2598         /* dont commit rxon if rf-kill is on*/
2599         if (!iwl_is_ready_rf(priv))
2600                 return -EAGAIN;
2601
2602         iwlcore_commit_rxon(priv);
2603
2604         return 0;
2605 }
2606 EXPORT_SYMBOL(iwl_set_mode);
2607
2608 int iwl_mac_add_interface(struct ieee80211_hw *hw,
2609                                  struct ieee80211_if_init_conf *conf)
2610 {
2611         struct iwl_priv *priv = hw->priv;
2612         unsigned long flags;
2613
2614         IWL_DEBUG_MAC80211(priv, "enter: type %d\n", conf->type);
2615
2616         if (priv->vif) {
2617                 IWL_DEBUG_MAC80211(priv, "leave - vif != NULL\n");
2618                 return -EOPNOTSUPP;
2619         }
2620
2621         spin_lock_irqsave(&priv->lock, flags);
2622         priv->vif = conf->vif;
2623         priv->iw_mode = conf->type;
2624
2625         spin_unlock_irqrestore(&priv->lock, flags);
2626
2627         mutex_lock(&priv->mutex);
2628
2629         if (conf->mac_addr) {
2630                 IWL_DEBUG_MAC80211(priv, "Set %pM\n", conf->mac_addr);
2631                 memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
2632         }
2633
2634         if (iwl_set_mode(priv, conf->type) == -EAGAIN)
2635                 /* we are not ready, will run again when ready */
2636                 set_bit(STATUS_MODE_PENDING, &priv->status);
2637
2638         mutex_unlock(&priv->mutex);
2639
2640         IWL_DEBUG_MAC80211(priv, "leave\n");
2641         return 0;
2642 }
2643 EXPORT_SYMBOL(iwl_mac_add_interface);
2644
2645 void iwl_mac_remove_interface(struct ieee80211_hw *hw,
2646                                      struct ieee80211_if_init_conf *conf)
2647 {
2648         struct iwl_priv *priv = hw->priv;
2649
2650         IWL_DEBUG_MAC80211(priv, "enter\n");
2651
2652         mutex_lock(&priv->mutex);
2653
2654         if (iwl_is_ready_rf(priv)) {
2655                 iwl_scan_cancel_timeout(priv, 100);
2656                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2657                 iwlcore_commit_rxon(priv);
2658         }
2659         if (priv->vif == conf->vif) {
2660                 priv->vif = NULL;
2661                 memset(priv->bssid, 0, ETH_ALEN);
2662         }
2663         mutex_unlock(&priv->mutex);
2664
2665         IWL_DEBUG_MAC80211(priv, "leave\n");
2666
2667 }
2668 EXPORT_SYMBOL(iwl_mac_remove_interface);
2669
2670 /**
2671  * iwl_mac_config - mac80211 config callback
2672  *
2673  * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
2674  * be set inappropriately and the driver currently sets the hardware up to
2675  * use it whenever needed.
2676  */
2677 int iwl_mac_config(struct ieee80211_hw *hw, u32 changed)
2678 {
2679         struct iwl_priv *priv = hw->priv;
2680         const struct iwl_channel_info *ch_info;
2681         struct ieee80211_conf *conf = &hw->conf;
2682         unsigned long flags = 0;
2683         int ret = 0;
2684         u16 ch;
2685         int scan_active = 0;
2686
2687         mutex_lock(&priv->mutex);
2688
2689         IWL_DEBUG_MAC80211(priv, "enter to channel %d changed 0x%X\n",
2690                                         conf->channel->hw_value, changed);
2691
2692         if (unlikely(!priv->cfg->mod_params->disable_hw_scan &&
2693                         test_bit(STATUS_SCANNING, &priv->status))) {
2694                 scan_active = 1;
2695                 IWL_DEBUG_MAC80211(priv, "leave - scanning\n");
2696         }
2697
2698
2699         /* during scanning mac80211 will delay channel setting until
2700          * scan finish with changed = 0
2701          */
2702         if (!changed || (changed & IEEE80211_CONF_CHANGE_CHANNEL)) {
2703                 if (scan_active)
2704                         goto set_ch_out;
2705
2706                 ch = ieee80211_frequency_to_channel(conf->channel->center_freq);
2707                 ch_info = iwl_get_channel_info(priv, conf->channel->band, ch);
2708                 if (!is_channel_valid(ch_info)) {
2709                         IWL_DEBUG_MAC80211(priv, "leave - invalid channel\n");
2710                         ret = -EINVAL;
2711                         goto set_ch_out;
2712                 }
2713
2714                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC &&
2715                         !is_channel_ibss(ch_info)) {
2716                         IWL_ERR(priv, "channel %d in band %d not "
2717                                 "IBSS channel\n",
2718                                 conf->channel->hw_value, conf->channel->band);
2719                         ret = -EINVAL;
2720                         goto set_ch_out;
2721                 }
2722
2723                 priv->current_ht_config.is_ht = conf_is_ht(conf);
2724
2725                 spin_lock_irqsave(&priv->lock, flags);
2726
2727
2728                 /* if we are switching from ht to 2.4 clear flags
2729                  * from any ht related info since 2.4 does not
2730                  * support ht */
2731                 if ((le16_to_cpu(priv->staging_rxon.channel) != ch))
2732                         priv->staging_rxon.flags = 0;
2733
2734                 iwl_set_rxon_channel(priv, conf->channel);
2735
2736                 iwl_set_flags_for_band(priv, conf->channel->band);
2737                 spin_unlock_irqrestore(&priv->lock, flags);
2738  set_ch_out:
2739                 /* The list of supported rates and rate mask can be different
2740                  * for each band; since the band may have changed, reset
2741                  * the rate mask to what mac80211 lists */
2742                 iwl_set_rate(priv);
2743         }
2744
2745         if (changed & IEEE80211_CONF_CHANGE_PS &&
2746             priv->iw_mode == NL80211_IFTYPE_STATION) {
2747                 priv->power_data.power_disabled =
2748                         !(conf->flags & IEEE80211_CONF_PS);
2749                 ret = iwl_power_update_mode(priv, 0);
2750                 if (ret)
2751                         IWL_DEBUG_MAC80211(priv, "Error setting power level\n");
2752         }
2753
2754         if (changed & IEEE80211_CONF_CHANGE_POWER) {
2755                 IWL_DEBUG_MAC80211(priv, "TX Power old=%d new=%d\n",
2756                         priv->tx_power_user_lmt, conf->power_level);
2757
2758                 iwl_set_tx_power(priv, conf->power_level, false);
2759         }
2760
2761         /* call to ensure that 4965 rx_chain is set properly in monitor mode */
2762         if (priv->cfg->ops->hcmd->set_rxon_chain)
2763                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
2764
2765         if (!iwl_is_ready(priv)) {
2766                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2767                 goto out;
2768         }
2769
2770         if (scan_active)
2771                 goto out;
2772
2773         if (memcmp(&priv->active_rxon,
2774                    &priv->staging_rxon, sizeof(priv->staging_rxon)))
2775                 iwlcore_commit_rxon(priv);
2776         else
2777                 IWL_DEBUG_INFO(priv, "Not re-sending same RXON configuration.\n");
2778
2779
2780 out:
2781         IWL_DEBUG_MAC80211(priv, "leave\n");
2782         mutex_unlock(&priv->mutex);
2783         return ret;
2784 }
2785 EXPORT_SYMBOL(iwl_mac_config);
2786
2787 int iwl_mac_get_tx_stats(struct ieee80211_hw *hw,
2788                          struct ieee80211_tx_queue_stats *stats)
2789 {
2790         struct iwl_priv *priv = hw->priv;
2791         int i, avail;
2792         struct iwl_tx_queue *txq;
2793         struct iwl_queue *q;
2794         unsigned long flags;
2795
2796         IWL_DEBUG_MAC80211(priv, "enter\n");
2797
2798         if (!iwl_is_ready_rf(priv)) {
2799                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
2800                 return -EIO;
2801         }
2802
2803         spin_lock_irqsave(&priv->lock, flags);
2804
2805         for (i = 0; i < AC_NUM; i++) {
2806                 txq = &priv->txq[i];
2807                 q = &txq->q;
2808                 avail = iwl_queue_space(q);
2809
2810                 stats[i].len = q->n_window - avail;
2811                 stats[i].limit = q->n_window - q->high_mark;
2812                 stats[i].count = q->n_window;
2813
2814         }
2815         spin_unlock_irqrestore(&priv->lock, flags);
2816
2817         IWL_DEBUG_MAC80211(priv, "leave\n");
2818
2819         return 0;
2820 }
2821 EXPORT_SYMBOL(iwl_mac_get_tx_stats);
2822
2823 void iwl_mac_reset_tsf(struct ieee80211_hw *hw)
2824 {
2825         struct iwl_priv *priv = hw->priv;
2826         unsigned long flags;
2827
2828         mutex_lock(&priv->mutex);
2829         IWL_DEBUG_MAC80211(priv, "enter\n");
2830
2831         spin_lock_irqsave(&priv->lock, flags);
2832         memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_info));
2833         spin_unlock_irqrestore(&priv->lock, flags);
2834
2835         iwl_reset_qos(priv);
2836
2837         spin_lock_irqsave(&priv->lock, flags);
2838         priv->assoc_id = 0;
2839         priv->assoc_capability = 0;
2840         priv->assoc_station_added = 0;
2841
2842         /* new association get rid of ibss beacon skb */
2843         if (priv->ibss_beacon)
2844                 dev_kfree_skb(priv->ibss_beacon);
2845
2846         priv->ibss_beacon = NULL;
2847
2848         priv->beacon_int = priv->vif->bss_conf.beacon_int;
2849         priv->timestamp = 0;
2850         if ((priv->iw_mode == NL80211_IFTYPE_STATION))
2851                 priv->beacon_int = 0;
2852
2853         spin_unlock_irqrestore(&priv->lock, flags);
2854
2855         if (!iwl_is_ready_rf(priv)) {
2856                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2857                 mutex_unlock(&priv->mutex);
2858                 return;
2859         }
2860
2861         /* we are restarting association process
2862          * clear RXON_FILTER_ASSOC_MSK bit
2863          */
2864         if (priv->iw_mode != NL80211_IFTYPE_AP) {
2865                 iwl_scan_cancel_timeout(priv, 100);
2866                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2867                 iwlcore_commit_rxon(priv);
2868         }
2869
2870         if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
2871                 IWL_DEBUG_MAC80211(priv, "leave - not in IBSS\n");
2872                 mutex_unlock(&priv->mutex);
2873                 return;
2874         }
2875
2876         iwl_set_rate(priv);
2877
2878         mutex_unlock(&priv->mutex);
2879
2880         IWL_DEBUG_MAC80211(priv, "leave\n");
2881 }
2882 EXPORT_SYMBOL(iwl_mac_reset_tsf);
2883
2884 #ifdef CONFIG_PM
2885
2886 int iwl_pci_suspend(struct pci_dev *pdev, pm_message_t state)
2887 {
2888         struct iwl_priv *priv = pci_get_drvdata(pdev);
2889
2890         /*
2891          * This function is called when system goes into suspend state
2892          * mac80211 will call iwl_mac_stop() from the mac80211 suspend function
2893          * first but since iwl_mac_stop() has no knowledge of who the caller is,
2894          * it will not call apm_ops.stop() to stop the DMA operation.
2895          * Calling apm_ops.stop here to make sure we stop the DMA.
2896          */
2897         priv->cfg->ops->lib->apm_ops.stop(priv);
2898
2899         pci_save_state(pdev);
2900         pci_disable_device(pdev);
2901         pci_set_power_state(pdev, PCI_D3hot);
2902
2903         return 0;
2904 }
2905 EXPORT_SYMBOL(iwl_pci_suspend);
2906
2907 int iwl_pci_resume(struct pci_dev *pdev)
2908 {
2909         struct iwl_priv *priv = pci_get_drvdata(pdev);
2910         int ret;
2911
2912         pci_set_power_state(pdev, PCI_D0);
2913         ret = pci_enable_device(pdev);
2914         if (ret)
2915                 return ret;
2916         pci_restore_state(pdev);
2917         iwl_enable_interrupts(priv);
2918
2919         return 0;
2920 }
2921 EXPORT_SYMBOL(iwl_pci_resume);
2922
2923 #endif /* CONFIG_PM */