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

   1 /******************************************************************************
   2  *
   3  * GPL LICENSE SUMMARY
   4  *
   5  * Copyright(c) 2008 - 2009 Intel Corporation. All rights reserved.
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of version 2 of the GNU General Public License as
   9  * published by the Free Software Foundation.
  10  *
  11  * This program is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
  19  * USA
  20  *
  21  * The full GNU General Public License is included in this distribution
  22  * in the file called LICENSE.GPL.
  23  *
  24  * Contact Information:
  25  *  Intel Linux Wireless <ilw@linux.intel.com>
  26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27  *****************************************************************************/
  28
  29 #include <linux/kernel.h>
  30 #include <linux/module.h>
  31 #include <linux/etherdevice.h>
  32 #include <net/mac80211.h>
  33
  34 #include "iwl-eeprom.h"
  35 #include "iwl-dev.h" /* FIXME: remove */
  36 #include "iwl-debug.h"
  37 #include "iwl-core.h"
  38 #include "iwl-io.h"
  39 #include "iwl-power.h"
  40 #include "iwl-sta.h"
  41 #include "iwl-helpers.h"
  42
  43
  44 MODULE_DESCRIPTION("iwl core");
  45 MODULE_VERSION(IWLWIFI_VERSION);
  46 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
  47 MODULE_LICENSE("GPL");
  48
  49 #define IWL_DECLARE_RATE_INFO(r, s, ip, in, rp, rn, pp, np)    \
  50         [IWL_RATE_##r##M_INDEX] = { IWL_RATE_##r##M_PLCP,      \
  51                                     IWL_RATE_SISO_##s##M_PLCP, \
  52                                     IWL_RATE_MIMO2_##s##M_PLCP,\
  53                                     IWL_RATE_MIMO3_##s##M_PLCP,\
  54                                     IWL_RATE_##r##M_IEEE,      \
  55                                     IWL_RATE_##ip##M_INDEX,    \
  56                                     IWL_RATE_##in##M_INDEX,    \
  57                                     IWL_RATE_##rp##M_INDEX,    \
  58                                     IWL_RATE_##rn##M_INDEX,    \
  59                                     IWL_RATE_##pp##M_INDEX,    \
  60                                     IWL_RATE_##np##M_INDEX }
  61
  62 u32 iwl_debug_level;
  63 EXPORT_SYMBOL(iwl_debug_level);
  64
  65 static irqreturn_t iwl_isr(int irq, void *data);
  66
  67 /*
  68  * Parameter order:
  69  *   rate, ht rate, prev rate, next rate, prev tgg rate, next tgg rate
  70  *
  71  * If there isn't a valid next or previous rate then INV is used which
  72  * maps to IWL_RATE_INVALID
  73  *
  74  */
  75 const struct iwl_rate_info iwl_rates[IWL_RATE_COUNT] = {
  76         IWL_DECLARE_RATE_INFO(1, INV, INV, 2, INV, 2, INV, 2),    /*  1mbps */
  77         IWL_DECLARE_RATE_INFO(2, INV, 1, 5, 1, 5, 1, 5),          /*  2mbps */
  78         IWL_DECLARE_RATE_INFO(5, INV, 2, 6, 2, 11, 2, 11),        /*5.5mbps */
  79         IWL_DECLARE_RATE_INFO(11, INV, 9, 12, 9, 12, 5, 18),      /* 11mbps */
  80         IWL_DECLARE_RATE_INFO(6, 6, 5, 9, 5, 11, 5, 11),        /*  6mbps */
  81         IWL_DECLARE_RATE_INFO(9, 6, 6, 11, 6, 11, 5, 11),       /*  9mbps */
  82         IWL_DECLARE_RATE_INFO(12, 12, 11, 18, 11, 18, 11, 18),   /* 12mbps */
  83         IWL_DECLARE_RATE_INFO(18, 18, 12, 24, 12, 24, 11, 24),   /* 18mbps */
  84         IWL_DECLARE_RATE_INFO(24, 24, 18, 36, 18, 36, 18, 36),   /* 24mbps */
  85         IWL_DECLARE_RATE_INFO(36, 36, 24, 48, 24, 48, 24, 48),   /* 36mbps */
  86         IWL_DECLARE_RATE_INFO(48, 48, 36, 54, 36, 54, 36, 54),   /* 48mbps */
  87         IWL_DECLARE_RATE_INFO(54, 54, 48, INV, 48, INV, 48, INV),/* 54mbps */
  88         IWL_DECLARE_RATE_INFO(60, 60, 48, INV, 48, INV, 48, INV),/* 60mbps */
  89         /* FIXME:RS:          ^^    should be INV (legacy) */
  90 };
  91 EXPORT_SYMBOL(iwl_rates);
  92
  93 /**
  94  * translate ucode response to mac80211 tx status control values
  95  */
  96 void iwl_hwrate_to_tx_control(struct iwl_priv *priv, u32 rate_n_flags,
  97                                   struct ieee80211_tx_info *info)
  98 {
  99         int rate_index;
 100         struct ieee80211_tx_rate *r = &info->control.rates[0];
 101
 102         info->antenna_sel_tx =
 103                 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
 104         if (rate_n_flags & RATE_MCS_HT_MSK)
 105                 r->flags |= IEEE80211_TX_RC_MCS;
 106         if (rate_n_flags & RATE_MCS_GF_MSK)
 107                 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
 108         if (rate_n_flags & RATE_MCS_FAT_MSK)
 109                 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
 110         if (rate_n_flags & RATE_MCS_DUP_MSK)
 111                 r->flags |= IEEE80211_TX_RC_DUP_DATA;
 112         if (rate_n_flags & RATE_MCS_SGI_MSK)
 113                 r->flags |= IEEE80211_TX_RC_SHORT_GI;
 114         rate_index = iwl_hwrate_to_plcp_idx(rate_n_flags);
 115         if (info->band == IEEE80211_BAND_5GHZ)
 116                 rate_index -= IWL_FIRST_OFDM_RATE;
 117         r->idx = rate_index;
 118 }
 119 EXPORT_SYMBOL(iwl_hwrate_to_tx_control);
 120
 121 int iwl_hwrate_to_plcp_idx(u32 rate_n_flags)
 122 {
 123         int idx = 0;
 124
 125         /* HT rate format */
 126         if (rate_n_flags & RATE_MCS_HT_MSK) {
 127                 idx = (rate_n_flags & 0xff);
 128
 129                 if (idx >= IWL_RATE_MIMO3_6M_PLCP)
 130                         idx = idx - IWL_RATE_MIMO3_6M_PLCP;
 131                 else if (idx >= IWL_RATE_MIMO2_6M_PLCP)
 132                         idx = idx - IWL_RATE_MIMO2_6M_PLCP;
 133
 134                 idx += IWL_FIRST_OFDM_RATE;
 135                 /* skip 9M not supported in ht*/
 136                 if (idx >= IWL_RATE_9M_INDEX)
 137                         idx += 1;
 138                 if ((idx >= IWL_FIRST_OFDM_RATE) && (idx <= IWL_LAST_OFDM_RATE))
 139                         return idx;
 140
 141         /* legacy rate format, search for match in table */
 142         } else {
 143                 for (idx = 0; idx < ARRAY_SIZE(iwl_rates); idx++)
 144                         if (iwl_rates[idx].plcp == (rate_n_flags & 0xFF))
 145                                 return idx;
 146         }
 147
 148         return -1;
 149 }
 150 EXPORT_SYMBOL(iwl_hwrate_to_plcp_idx);
 151
 152 u8 iwl_toggle_tx_ant(struct iwl_priv *priv, u8 ant)
 153 {
 154         int i;
 155         u8 ind = ant;
 156         for (i = 0; i < RATE_ANT_NUM - 1; i++) {
 157                 ind = (ind + 1) < RATE_ANT_NUM ?  ind + 1 : 0;
 158                 if (priv->hw_params.valid_tx_ant & BIT(ind))
 159                         return ind;
 160         }
 161         return ant;
 162 }
 163
 164 const u8 iwl_bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
 165 EXPORT_SYMBOL(iwl_bcast_addr);
 166
 167
 168 /* This function both allocates and initializes hw and priv. */
 169 struct ieee80211_hw *iwl_alloc_all(struct iwl_cfg *cfg,
 170                 struct ieee80211_ops *hw_ops)
 171 {
 172         struct iwl_priv *priv;
 173
 174         /* mac80211 allocates memory for this device instance, including
 175          *   space for this driver's private structure */
 176         struct ieee80211_hw *hw =
 177                 ieee80211_alloc_hw(sizeof(struct iwl_priv), hw_ops);
 178         if (hw == NULL) {
 179                 printk(KERN_ERR "%s: Can not allocate network device\n",
 180                        cfg->name);
 181                 goto out;
 182         }
 183
 184         priv = hw->priv;
 185         priv->hw = hw;
 186
 187 out:
 188         return hw;
 189 }
 190 EXPORT_SYMBOL(iwl_alloc_all);
 191
 192 void iwl_hw_detect(struct iwl_priv *priv)
 193 {
 194         priv->hw_rev = _iwl_read32(priv, CSR_HW_REV);
 195         priv->hw_wa_rev = _iwl_read32(priv, CSR_HW_REV_WA_REG);
 196         pci_read_config_byte(priv->pci_dev, PCI_REVISION_ID, &priv->rev_id);
 197 }
 198 EXPORT_SYMBOL(iwl_hw_detect);
 199
 200 int iwl_hw_nic_init(struct iwl_priv *priv)
 201 {
 202         unsigned long flags;
 203         struct iwl_rx_queue *rxq = &priv->rxq;
 204         int ret;
 205
 206         /* nic_init */
 207         spin_lock_irqsave(&priv->lock, flags);
 208         priv->cfg->ops->lib->apm_ops.init(priv);
 209         iwl_write32(priv, CSR_INT_COALESCING, 512 / 32);
 210         spin_unlock_irqrestore(&priv->lock, flags);
 211
 212         ret = priv->cfg->ops->lib->apm_ops.set_pwr_src(priv, IWL_PWR_SRC_VMAIN);
 213
 214         priv->cfg->ops->lib->apm_ops.config(priv);
 215
 216         /* Allocate the RX queue, or reset if it is already allocated */
 217         if (!rxq->bd) {
 218                 ret = iwl_rx_queue_alloc(priv);
 219                 if (ret) {
 220                         IWL_ERR(priv, "Unable to initialize Rx queue\n");
 221                         return -ENOMEM;
 222                 }
 223         } else
 224                 iwl_rx_queue_reset(priv, rxq);
 225
 226         iwl_rx_replenish(priv);
 227
 228         iwl_rx_init(priv, rxq);
 229
 230         spin_lock_irqsave(&priv->lock, flags);
 231
 232         rxq->need_update = 1;
 233         iwl_rx_queue_update_write_ptr(priv, rxq);
 234
 235         spin_unlock_irqrestore(&priv->lock, flags);
 236
 237         /* Allocate and init all Tx and Command queues */
 238         ret = iwl_txq_ctx_reset(priv);
 239         if (ret)
 240                 return ret;
 241
 242         set_bit(STATUS_INIT, &priv->status);
 243
 244         return 0;
 245 }
 246 EXPORT_SYMBOL(iwl_hw_nic_init);
 247
 248 /*
 249  * QoS  support
 250 */
 251 void iwl_activate_qos(struct iwl_priv *priv, u8 force)
 252 {
 253         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 254                 return;
 255
 256         priv->qos_data.def_qos_parm.qos_flags = 0;
 257
 258         if (priv->qos_data.qos_cap.q_AP.queue_request &&
 259             !priv->qos_data.qos_cap.q_AP.txop_request)
 260                 priv->qos_data.def_qos_parm.qos_flags |=
 261                         QOS_PARAM_FLG_TXOP_TYPE_MSK;
 262         if (priv->qos_data.qos_active)
 263                 priv->qos_data.def_qos_parm.qos_flags |=
 264                         QOS_PARAM_FLG_UPDATE_EDCA_MSK;
 265
 266         if (priv->current_ht_config.is_ht)
 267                 priv->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
 268
 269         if (force || iwl_is_associated(priv)) {
 270                 IWL_DEBUG_QOS(priv, "send QoS cmd with Qos active=%d FLAGS=0x%X\n",
 271                                 priv->qos_data.qos_active,
 272                                 priv->qos_data.def_qos_parm.qos_flags);
 273
 274                 iwl_send_cmd_pdu_async(priv, REPLY_QOS_PARAM,
 275                                        sizeof(struct iwl_qosparam_cmd),
 276                                        &priv->qos_data.def_qos_parm, NULL);
 277         }
 278 }
 279 EXPORT_SYMBOL(iwl_activate_qos);
 280
 281 /*
 282  * AC        CWmin         CW max      AIFSN      TXOP Limit    TXOP Limit
 283  *                                              (802.11b)      (802.11a/g)
 284  * AC_BK      15            1023        7           0               0
 285  * AC_BE      15            1023        3           0               0
 286  * AC_VI       7              15        2          6.016ms       3.008ms
 287  * AC_VO       3               7        2          3.264ms       1.504ms
 288  */
 289 void iwl_reset_qos(struct iwl_priv *priv)
 290 {
 291         u16 cw_min = 15;
 292         u16 cw_max = 1023;
 293         u8 aifs = 2;
 294         bool is_legacy = false;
 295         unsigned long flags;
 296         int i;
 297
 298         spin_lock_irqsave(&priv->lock, flags);
 299         /* QoS always active in AP and ADHOC mode
 300          * In STA mode wait for association
 301          */
 302         if (priv->iw_mode == NL80211_IFTYPE_ADHOC ||
 303             priv->iw_mode == NL80211_IFTYPE_AP)
 304                 priv->qos_data.qos_active = 1;
 305         else
 306                 priv->qos_data.qos_active = 0;
 307
 308         /* check for legacy mode */
 309         if ((priv->iw_mode == NL80211_IFTYPE_ADHOC &&
 310             (priv->active_rate & IWL_OFDM_RATES_MASK) == 0) ||
 311             (priv->iw_mode == NL80211_IFTYPE_STATION &&
 312             (priv->staging_rxon.flags & RXON_FLG_SHORT_SLOT_MSK) == 0)) {
 313                 cw_min = 31;
 314                 is_legacy = 1;
 315         }
 316
 317         if (priv->qos_data.qos_active)
 318                 aifs = 3;
 319
 320         /* AC_BE */
 321         priv->qos_data.def_qos_parm.ac[0].cw_min = cpu_to_le16(cw_min);
 322         priv->qos_data.def_qos_parm.ac[0].cw_max = cpu_to_le16(cw_max);
 323         priv->qos_data.def_qos_parm.ac[0].aifsn = aifs;
 324         priv->qos_data.def_qos_parm.ac[0].edca_txop = 0;
 325         priv->qos_data.def_qos_parm.ac[0].reserved1 = 0;
 326
 327         if (priv->qos_data.qos_active) {
 328                 /* AC_BK */
 329                 i = 1;
 330                 priv->qos_data.def_qos_parm.ac[i].cw_min = cpu_to_le16(cw_min);
 331                 priv->qos_data.def_qos_parm.ac[i].cw_max = cpu_to_le16(cw_max);
 332                 priv->qos_data.def_qos_parm.ac[i].aifsn = 7;
 333                 priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
 334                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
 335
 336                 /* AC_VI */
 337                 i = 2;
 338                 priv->qos_data.def_qos_parm.ac[i].cw_min =
 339                         cpu_to_le16((cw_min + 1) / 2 - 1);
 340                 priv->qos_data.def_qos_parm.ac[i].cw_max =
 341                         cpu_to_le16(cw_min);
 342                 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
 343                 if (is_legacy)
 344                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
 345                                 cpu_to_le16(6016);
 346                 else
 347                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
 348                                 cpu_to_le16(3008);
 349                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
 350
 351                 /* AC_VO */
 352                 i = 3;
 353                 priv->qos_data.def_qos_parm.ac[i].cw_min =
 354                         cpu_to_le16((cw_min + 1) / 4 - 1);
 355                 priv->qos_data.def_qos_parm.ac[i].cw_max =
 356                         cpu_to_le16((cw_min + 1) / 2 - 1);
 357                 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
 358                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
 359                 if (is_legacy)
 360                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
 361                                 cpu_to_le16(3264);
 362                 else
 363                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
 364                                 cpu_to_le16(1504);
 365         } else {
 366                 for (i = 1; i < 4; i++) {
 367                         priv->qos_data.def_qos_parm.ac[i].cw_min =
 368                                 cpu_to_le16(cw_min);
 369                         priv->qos_data.def_qos_parm.ac[i].cw_max =
 370                                 cpu_to_le16(cw_max);
 371                         priv->qos_data.def_qos_parm.ac[i].aifsn = aifs;
 372                         priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
 373                         priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
 374                 }
 375         }
 376         IWL_DEBUG_QOS(priv, "set QoS to default \n");
 377
 378         spin_unlock_irqrestore(&priv->lock, flags);
 379 }
 380 EXPORT_SYMBOL(iwl_reset_qos);
 381
 382 #define MAX_BIT_RATE_40_MHZ 150 /* Mbps */
 383 #define MAX_BIT_RATE_20_MHZ 72 /* Mbps */
 384 static void iwlcore_init_ht_hw_capab(const struct iwl_priv *priv,
 385                               struct ieee80211_sta_ht_cap *ht_info,
 386                               enum ieee80211_band band)
 387 {
 388         u16 max_bit_rate = 0;
 389         u8 rx_chains_num = priv->hw_params.rx_chains_num;
 390         u8 tx_chains_num = priv->hw_params.tx_chains_num;
 391
 392         ht_info->cap = 0;
 393         memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));
 394
 395         ht_info->ht_supported = true;
 396
 397         ht_info->cap |= IEEE80211_HT_CAP_GRN_FLD;
 398         ht_info->cap |= IEEE80211_HT_CAP_SGI_20;
 399         ht_info->cap |= (IEEE80211_HT_CAP_SM_PS &
 400                              (WLAN_HT_CAP_SM_PS_DISABLED << 2));
 401
 402         max_bit_rate = MAX_BIT_RATE_20_MHZ;
 403         if (priv->hw_params.fat_channel & BIT(band)) {
 404                 ht_info->cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 405                 ht_info->cap |= IEEE80211_HT_CAP_SGI_40;
 406                 ht_info->mcs.rx_mask[4] = 0x01;
 407                 max_bit_rate = MAX_BIT_RATE_40_MHZ;
 408         }
 409
 410         if (priv->cfg->mod_params->amsdu_size_8K)
 411                 ht_info->cap |= IEEE80211_HT_CAP_MAX_AMSDU;
 412
 413         ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
 414         ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;
 415
 416         ht_info->mcs.rx_mask[0] = 0xFF;
 417         if (rx_chains_num >= 2)
 418                 ht_info->mcs.rx_mask[1] = 0xFF;
 419         if (rx_chains_num >= 3)
 420                 ht_info->mcs.rx_mask[2] = 0xFF;
 421
 422         /* Highest supported Rx data rate */
 423         max_bit_rate *= rx_chains_num;
 424         WARN_ON(max_bit_rate & ~IEEE80211_HT_MCS_RX_HIGHEST_MASK);
 425         ht_info->mcs.rx_highest = cpu_to_le16(max_bit_rate);
 426
 427         /* Tx MCS capabilities */
 428         ht_info->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
 429         if (tx_chains_num != rx_chains_num) {
 430                 ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
 431                 ht_info->mcs.tx_params |= ((tx_chains_num - 1) <<
 432                                 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT);
 433         }
 434 }
 435
 436 static void iwlcore_init_hw_rates(struct iwl_priv *priv,
 437                               struct ieee80211_rate *rates)
 438 {
 439         int i;
 440
 441         for (i = 0; i < IWL_RATE_COUNT; i++) {
 442                 rates[i].bitrate = iwl_rates[i].ieee * 5;
 443                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
 444                 rates[i].hw_value_short = i;
 445                 rates[i].flags = 0;
 446                 if ((i > IWL_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
 447                         /*
 448                          * If CCK != 1M then set short preamble rate flag.
 449                          */
 450                         rates[i].flags |=
 451                                 (iwl_rates[i].plcp == IWL_RATE_1M_PLCP) ?
 452                                         0 : IEEE80211_RATE_SHORT_PREAMBLE;
 453                 }
 454         }
 455 }
 456
 457
 458 /**
 459  * iwlcore_init_geos - Initialize mac80211's geo/channel info based from eeprom
 460  */
 461 int iwlcore_init_geos(struct iwl_priv *priv)
 462 {
 463         struct iwl_channel_info *ch;
 464         struct ieee80211_supported_band *sband;
 465         struct ieee80211_channel *channels;
 466         struct ieee80211_channel *geo_ch;
 467         struct ieee80211_rate *rates;
 468         int i = 0;
 469
 470         if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
 471             priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
 472                 IWL_DEBUG_INFO(priv, "Geography modes already initialized.\n");
 473                 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
 474                 return 0;
 475         }
 476
 477         channels = kzalloc(sizeof(struct ieee80211_channel) *
 478                            priv->channel_count, GFP_KERNEL);
 479         if (!channels)
 480                 return -ENOMEM;
 481
 482         rates = kzalloc((sizeof(struct ieee80211_rate) * (IWL_RATE_COUNT + 1)),
 483                         GFP_KERNEL);
 484         if (!rates) {
 485                 kfree(channels);
 486                 return -ENOMEM;
 487         }
 488
 489         /* 5.2GHz channels start after the 2.4GHz channels */
 490         sband = &priv->bands[IEEE80211_BAND_5GHZ];
 491         sband->channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)];
 492         /* just OFDM */
 493         sband->bitrates = &rates[IWL_FIRST_OFDM_RATE];
 494         sband->n_bitrates = IWL_RATE_COUNT - IWL_FIRST_OFDM_RATE;
 495
 496         if (priv->cfg->sku & IWL_SKU_N)
 497                 iwlcore_init_ht_hw_capab(priv, &sband->ht_cap,
 498                                          IEEE80211_BAND_5GHZ);
 499
 500         sband = &priv->bands[IEEE80211_BAND_2GHZ];
 501         sband->channels = channels;
 502         /* OFDM & CCK */
 503         sband->bitrates = rates;
 504         sband->n_bitrates = IWL_RATE_COUNT;
 505
 506         if (priv->cfg->sku & IWL_SKU_N)
 507                 iwlcore_init_ht_hw_capab(priv, &sband->ht_cap,
 508                                          IEEE80211_BAND_2GHZ);
 509
 510         priv->ieee_channels = channels;
 511         priv->ieee_rates = rates;
 512
 513         for (i = 0;  i < priv->channel_count; i++) {
 514                 ch = &priv->channel_info[i];
 515
 516                 /* FIXME: might be removed if scan is OK */
 517                 if (!is_channel_valid(ch))
 518                         continue;
 519
 520                 if (is_channel_a_band(ch))
 521                         sband =  &priv->bands[IEEE80211_BAND_5GHZ];
 522                 else
 523                         sband =  &priv->bands[IEEE80211_BAND_2GHZ];
 524
 525                 geo_ch = &sband->channels[sband->n_channels++];
 526
 527                 geo_ch->center_freq =
 528                                 ieee80211_channel_to_frequency(ch->channel);
 529                 geo_ch->max_power = ch->max_power_avg;
 530                 geo_ch->max_antenna_gain = 0xff;
 531                 geo_ch->hw_value = ch->channel;
 532
 533                 if (is_channel_valid(ch)) {
 534                         if (!(ch->flags & EEPROM_CHANNEL_IBSS))
 535                                 geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
 536
 537                         if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
 538                                 geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
 539
 540                         if (ch->flags & EEPROM_CHANNEL_RADAR)
 541                                 geo_ch->flags |= IEEE80211_CHAN_RADAR;
 542
 543                         geo_ch->flags |= ch->fat_extension_channel;
 544
 545                         if (ch->max_power_avg > priv->tx_power_channel_lmt)
 546                                 priv->tx_power_channel_lmt = ch->max_power_avg;
 547                 } else {
 548                         geo_ch->flags |= IEEE80211_CHAN_DISABLED;
 549                 }
 550
 551                 /* Save flags for reg domain usage */
 552                 geo_ch->orig_flags = geo_ch->flags;
 553
 554                 IWL_DEBUG_INFO(priv, "Channel %d Freq=%d[%sGHz] %s flag=0x%X\n",
 555                                 ch->channel, geo_ch->center_freq,
 556                                 is_channel_a_band(ch) ?  "5.2" : "2.4",
 557                                 geo_ch->flags & IEEE80211_CHAN_DISABLED ?
 558                                 "restricted" : "valid",
 559                                  geo_ch->flags);
 560         }
 561
 562         if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) &&
 563              priv->cfg->sku & IWL_SKU_A) {
 564                 IWL_INFO(priv, "Incorrectly detected BG card as ABG. "
 565                         "Please send your PCI ID 0x%04X:0x%04X to maintainer.\n",
 566                            priv->pci_dev->device,
 567                            priv->pci_dev->subsystem_device);
 568                 priv->cfg->sku &= ~IWL_SKU_A;
 569         }
 570
 571         IWL_INFO(priv, "Tunable channels: %d 802.11bg, %d 802.11a channels\n",
 572                    priv->bands[IEEE80211_BAND_2GHZ].n_channels,
 573                    priv->bands[IEEE80211_BAND_5GHZ].n_channels);
 574
 575         set_bit(STATUS_GEO_CONFIGURED, &priv->status);
 576
 577         return 0;
 578 }
 579 EXPORT_SYMBOL(iwlcore_init_geos);
 580
 581 /*
 582  * iwlcore_free_geos - undo allocations in iwlcore_init_geos
 583  */
 584 void iwlcore_free_geos(struct iwl_priv *priv)
 585 {
 586         kfree(priv->ieee_channels);
 587         kfree(priv->ieee_rates);
 588         clear_bit(STATUS_GEO_CONFIGURED, &priv->status);
 589 }
 590 EXPORT_SYMBOL(iwlcore_free_geos);
 591
 592 static bool is_single_rx_stream(struct iwl_priv *priv)
 593 {
 594         return !priv->current_ht_config.is_ht ||
 595                ((priv->current_ht_config.mcs.rx_mask[1] == 0) &&
 596                 (priv->current_ht_config.mcs.rx_mask[2] == 0));
 597 }
 598
 599 static u8 iwl_is_channel_extension(struct iwl_priv *priv,
 600                                    enum ieee80211_band band,
 601                                    u16 channel, u8 extension_chan_offset)
 602 {
 603         const struct iwl_channel_info *ch_info;
 604
 605         ch_info = iwl_get_channel_info(priv, band, channel);
 606         if (!is_channel_valid(ch_info))
 607                 return 0;
 608
 609         if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE)
 610                 return !(ch_info->fat_extension_channel &
 611                                         IEEE80211_CHAN_NO_HT40PLUS);
 612         else if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW)
 613                 return !(ch_info->fat_extension_channel &
 614                                         IEEE80211_CHAN_NO_HT40MINUS);
 615
 616         return 0;
 617 }
 618
 619 u8 iwl_is_fat_tx_allowed(struct iwl_priv *priv,
 620                          struct ieee80211_sta_ht_cap *sta_ht_inf)
 621 {
 622         struct iwl_ht_info *iwl_ht_conf = &priv->current_ht_config;
 623
 624         if ((!iwl_ht_conf->is_ht) ||
 625             (iwl_ht_conf->supported_chan_width != IWL_CHANNEL_WIDTH_40MHZ))
 626                 return 0;
 627
 628         /* We do not check for IEEE80211_HT_CAP_SUP_WIDTH_20_40
 629          * the bit will not set if it is pure 40MHz case
 630          */
 631         if (sta_ht_inf) {
 632                 if (!sta_ht_inf->ht_supported)
 633                         return 0;
 634         }
 635 #ifdef CONFIG_IWLWIFI_DEBUG
 636         if (priv->disable_ht40)
 637                 return 0;
 638 #endif
 639         return iwl_is_channel_extension(priv, priv->band,
 640                         le16_to_cpu(priv->staging_rxon.channel),
 641                         iwl_ht_conf->extension_chan_offset);
 642 }
 643 EXPORT_SYMBOL(iwl_is_fat_tx_allowed);
 644
 645 static u16 iwl_adjust_beacon_interval(u16 beacon_val, u16 max_beacon_val)
 646 {
 647         u16 new_val = 0;
 648         u16 beacon_factor = 0;
 649
 650         beacon_factor = (beacon_val + max_beacon_val) / max_beacon_val;
 651         new_val = beacon_val / beacon_factor;
 652
 653         if (!new_val)
 654                 new_val = max_beacon_val;
 655
 656         return new_val;
 657 }
 658
 659 void iwl_setup_rxon_timing(struct iwl_priv *priv)
 660 {
 661         u64 tsf;
 662         s32 interval_tm, rem;
 663         unsigned long flags;
 664         struct ieee80211_conf *conf = NULL;
 665         u16 beacon_int;
 666
 667         conf = ieee80211_get_hw_conf(priv->hw);
 668
 669         spin_lock_irqsave(&priv->lock, flags);
 670         priv->rxon_timing.timestamp = cpu_to_le64(priv->timestamp);
 671         priv->rxon_timing.listen_interval = cpu_to_le16(conf->listen_interval);
 672
 673         if (priv->iw_mode == NL80211_IFTYPE_STATION) {
 674                 beacon_int = priv->beacon_int;
 675                 priv->rxon_timing.atim_window = 0;
 676         } else {
 677                 beacon_int = priv->vif->bss_conf.beacon_int;
 678
 679                 /* TODO: we need to get atim_window from upper stack
 680                  * for now we set to 0 */
 681                 priv->rxon_timing.atim_window = 0;
 682         }
 683
 684         beacon_int = iwl_adjust_beacon_interval(beacon_int,
 685                                 priv->hw_params.max_beacon_itrvl * 1024);
 686         priv->rxon_timing.beacon_interval = cpu_to_le16(beacon_int);
 687
 688         tsf = priv->timestamp; /* tsf is modifed by do_div: copy it */
 689         interval_tm = beacon_int * 1024;
 690         rem = do_div(tsf, interval_tm);
 691         priv->rxon_timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
 692
 693         spin_unlock_irqrestore(&priv->lock, flags);
 694         IWL_DEBUG_ASSOC(priv,
 695                         "beacon interval %d beacon timer %d beacon tim %d\n",
 696                         le16_to_cpu(priv->rxon_timing.beacon_interval),
 697                         le32_to_cpu(priv->rxon_timing.beacon_init_val),
 698                         le16_to_cpu(priv->rxon_timing.atim_window));
 699 }
 700 EXPORT_SYMBOL(iwl_setup_rxon_timing);
 701
 702 void iwl_set_rxon_hwcrypto(struct iwl_priv *priv, int hw_decrypt)
 703 {
 704         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
 705
 706         if (hw_decrypt)
 707                 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
 708         else
 709                 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
 710
 711 }
 712 EXPORT_SYMBOL(iwl_set_rxon_hwcrypto);
 713
 714 /**
 715  * iwl_check_rxon_cmd - validate RXON structure is valid
 716  *
 717  * NOTE:  This is really only useful during development and can eventually
 718  * be #ifdef'd out once the driver is stable and folks aren't actively
 719  * making changes
 720  */
 721 int iwl_check_rxon_cmd(struct iwl_priv *priv)
 722 {
 723         int error = 0;
 724         int counter = 1;
 725         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
 726
 727         if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
 728                 error |= le32_to_cpu(rxon->flags &
 729                                 (RXON_FLG_TGJ_NARROW_BAND_MSK |
 730                                  RXON_FLG_RADAR_DETECT_MSK));
 731                 if (error)
 732                         IWL_WARN(priv, "check 24G fields %d | %d\n",
 733                                     counter++, error);
 734         } else {
 735                 error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ?
 736                                 0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK);
 737                 if (error)
 738                         IWL_WARN(priv, "check 52 fields %d | %d\n",
 739                                     counter++, error);
 740                 error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK);
 741                 if (error)
 742                         IWL_WARN(priv, "check 52 CCK %d | %d\n",
 743                                     counter++, error);
 744         }
 745         error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1;
 746         if (error)
 747                 IWL_WARN(priv, "check mac addr %d | %d\n", counter++, error);
 748
 749         /* make sure basic rates 6Mbps and 1Mbps are supported */
 750         error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) &&
 751                   ((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0));
 752         if (error)
 753                 IWL_WARN(priv, "check basic rate %d | %d\n", counter++, error);
 754
 755         error |= (le16_to_cpu(rxon->assoc_id) > 2007);
 756         if (error)
 757                 IWL_WARN(priv, "check assoc id %d | %d\n", counter++, error);
 758
 759         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
 760                         == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK));
 761         if (error)
 762                 IWL_WARN(priv, "check CCK and short slot %d | %d\n",
 763                             counter++, error);
 764
 765         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
 766                         == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK));
 767         if (error)
 768                 IWL_WARN(priv, "check CCK & auto detect %d | %d\n",
 769                             counter++, error);
 770
 771         error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
 772                         RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK);
 773         if (error)
 774                 IWL_WARN(priv, "check TGG and auto detect %d | %d\n",
 775                             counter++, error);
 776
 777         if (error)
 778                 IWL_WARN(priv, "Tuning to channel %d\n",
 779                             le16_to_cpu(rxon->channel));
 780
 781         if (error) {
 782                 IWL_ERR(priv, "Not a valid iwl_rxon_assoc_cmd field values\n");
 783                 return -1;
 784         }
 785         return 0;
 786 }
 787 EXPORT_SYMBOL(iwl_check_rxon_cmd);
 788
 789 /**
 790  * iwl_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
 791  * @priv: staging_rxon is compared to active_rxon
 792  *
 793  * If the RXON structure is changing enough to require a new tune,
 794  * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
 795  * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
 796  */
 797 int iwl_full_rxon_required(struct iwl_priv *priv)
 798 {
 799
 800         /* These items are only settable from the full RXON command */
 801         if (!(iwl_is_associated(priv)) ||
 802             compare_ether_addr(priv->staging_rxon.bssid_addr,
 803                                priv->active_rxon.bssid_addr) ||
 804             compare_ether_addr(priv->staging_rxon.node_addr,
 805                                priv->active_rxon.node_addr) ||
 806             compare_ether_addr(priv->staging_rxon.wlap_bssid_addr,
 807                                priv->active_rxon.wlap_bssid_addr) ||
 808             (priv->staging_rxon.dev_type != priv->active_rxon.dev_type) ||
 809             (priv->staging_rxon.channel != priv->active_rxon.channel) ||
 810             (priv->staging_rxon.air_propagation !=
 811              priv->active_rxon.air_propagation) ||
 812             (priv->staging_rxon.ofdm_ht_single_stream_basic_rates !=
 813              priv->active_rxon.ofdm_ht_single_stream_basic_rates) ||
 814             (priv->staging_rxon.ofdm_ht_dual_stream_basic_rates !=
 815              priv->active_rxon.ofdm_ht_dual_stream_basic_rates) ||
 816             (priv->staging_rxon.ofdm_ht_triple_stream_basic_rates !=
 817              priv->active_rxon.ofdm_ht_triple_stream_basic_rates) ||
 818             (priv->staging_rxon.assoc_id != priv->active_rxon.assoc_id))
 819                 return 1;
 820
 821         /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
 822          * be updated with the RXON_ASSOC command -- however only some
 823          * flag transitions are allowed using RXON_ASSOC */
 824
 825         /* Check if we are not switching bands */
 826         if ((priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) !=
 827             (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK))
 828                 return 1;
 829
 830         /* Check if we are switching association toggle */
 831         if ((priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) !=
 832                 (priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK))
 833                 return 1;
 834
 835         return 0;
 836 }
 837 EXPORT_SYMBOL(iwl_full_rxon_required);
 838
 839 u8 iwl_rate_get_lowest_plcp(struct iwl_priv *priv)
 840 {
 841         int i;
 842         int rate_mask;
 843
 844         /* Set rate mask*/
 845         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)
 846                 rate_mask = priv->active_rate_basic & IWL_CCK_RATES_MASK;
 847         else
 848                 rate_mask = priv->active_rate_basic & IWL_OFDM_RATES_MASK;
 849
 850         /* Find lowest valid rate */
 851         for (i = IWL_RATE_1M_INDEX; i != IWL_RATE_INVALID;
 852                                         i = iwl_rates[i].next_ieee) {
 853                 if (rate_mask & (1 << i))
 854                         return iwl_rates[i].plcp;
 855         }
 856
 857         /* No valid rate was found. Assign the lowest one */
 858         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)
 859                 return IWL_RATE_1M_PLCP;
 860         else
 861                 return IWL_RATE_6M_PLCP;
 862 }
 863 EXPORT_SYMBOL(iwl_rate_get_lowest_plcp);
 864
 865 void iwl_set_rxon_ht(struct iwl_priv *priv, struct iwl_ht_info *ht_info)
 866 {
 867         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
 868
 869         if (!ht_info->is_ht) {
 870                 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
 871                         RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK |
 872                         RXON_FLG_FAT_PROT_MSK |
 873                         RXON_FLG_HT_PROT_MSK);
 874                 return;
 875         }
 876
 877         /* FIXME: if the definition of ht_protection changed, the "translation"
 878          * will be needed for rxon->flags
 879          */
 880         rxon->flags |= cpu_to_le32(ht_info->ht_protection << RXON_FLG_HT_OPERATING_MODE_POS);
 881
 882         /* Set up channel bandwidth:
 883          * 20 MHz only, 20/40 mixed or pure 40 if fat ok */
 884         /* clear the HT channel mode before set the mode */
 885         rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
 886                          RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
 887         if (iwl_is_fat_tx_allowed(priv, NULL)) {
 888                 /* pure 40 fat */
 889                 if (ht_info->ht_protection == IEEE80211_HT_OP_MODE_PROTECTION_20MHZ) {
 890                         rxon->flags |= RXON_FLG_CHANNEL_MODE_PURE_40;
 891                         /* Note: control channel is opposite of extension channel */
 892                         switch (ht_info->extension_chan_offset) {
 893                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 894                                 rxon->flags &= ~RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
 895                                 break;
 896                         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 897                                 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
 898                                 break;
 899                         }
 900                 } else {
 901                         /* Note: control channel is opposite of extension channel */
 902                         switch (ht_info->extension_chan_offset) {
 903                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 904                                 rxon->flags &= ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
 905                                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
 906                                 break;
 907                         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 908                                 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
 909                                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
 910                                 break;
 911                         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
 912                         default:
 913                                 /* channel location only valid if in Mixed mode */
 914                                 IWL_ERR(priv, "invalid extension channel offset\n");
 915                                 break;
 916                         }
 917                 }
 918         } else {
 919                 rxon->flags |= RXON_FLG_CHANNEL_MODE_LEGACY;
 920         }
 921
 922         if (priv->cfg->ops->hcmd->set_rxon_chain)
 923                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
 924
 925         IWL_DEBUG_ASSOC(priv, "supported HT rate 0x%X 0x%X 0x%X "
 926                         "rxon flags 0x%X operation mode :0x%X "
 927                         "extension channel offset 0x%x\n",
 928                         ht_info->mcs.rx_mask[0],
 929                         ht_info->mcs.rx_mask[1],
 930                         ht_info->mcs.rx_mask[2],
 931                         le32_to_cpu(rxon->flags), ht_info->ht_protection,
 932                         ht_info->extension_chan_offset);
 933         return;
 934 }
 935 EXPORT_SYMBOL(iwl_set_rxon_ht);
 936
 937 #define IWL_NUM_RX_CHAINS_MULTIPLE      3
 938 #define IWL_NUM_RX_CHAINS_SINGLE        2
 939 #define IWL_NUM_IDLE_CHAINS_DUAL        2
 940 #define IWL_NUM_IDLE_CHAINS_SINGLE      1
 941
 942 /* Determine how many receiver/antenna chains to use.
 943  * More provides better reception via diversity.  Fewer saves power.
 944  * MIMO (dual stream) requires at least 2, but works better with 3.
 945  * This does not determine *which* chains to use, just how many.
 946  */
 947 static int iwl_get_active_rx_chain_count(struct iwl_priv *priv)
 948 {
 949         bool is_single = is_single_rx_stream(priv);
 950         bool is_cam = !test_bit(STATUS_POWER_PMI, &priv->status);
 951
 952         /* # of Rx chains to use when expecting MIMO. */
 953         if (is_single || (!is_cam && (priv->current_ht_config.sm_ps ==
 954                                                  WLAN_HT_CAP_SM_PS_STATIC)))
 955                 return IWL_NUM_RX_CHAINS_SINGLE;
 956         else
 957                 return IWL_NUM_RX_CHAINS_MULTIPLE;
 958 }
 959
 960 static int iwl_get_idle_rx_chain_count(struct iwl_priv *priv, int active_cnt)
 961 {
 962         int idle_cnt;
 963         bool is_cam = !test_bit(STATUS_POWER_PMI, &priv->status);
 964         /* # Rx chains when idling and maybe trying to save power */
 965         switch (priv->current_ht_config.sm_ps) {
 966         case WLAN_HT_CAP_SM_PS_STATIC:
 967         case WLAN_HT_CAP_SM_PS_DYNAMIC:
 968                 idle_cnt = (is_cam) ? IWL_NUM_IDLE_CHAINS_DUAL :
 969                                         IWL_NUM_IDLE_CHAINS_SINGLE;
 970                 break;
 971         case WLAN_HT_CAP_SM_PS_DISABLED:
 972                 idle_cnt = (is_cam) ? active_cnt : IWL_NUM_IDLE_CHAINS_SINGLE;
 973                 break;
 974         case WLAN_HT_CAP_SM_PS_INVALID:
 975         default:
 976                 IWL_ERR(priv, "invalid mimo ps mode %d\n",
 977                            priv->current_ht_config.sm_ps);
 978                 WARN_ON(1);
 979                 idle_cnt = -1;
 980                 break;
 981         }
 982         return idle_cnt;
 983 }
 984
 985 /* up to 4 chains */
 986 static u8 iwl_count_chain_bitmap(u32 chain_bitmap)
 987 {
 988         u8 res;
 989         res = (chain_bitmap & BIT(0)) >> 0;
 990         res += (chain_bitmap & BIT(1)) >> 1;
 991         res += (chain_bitmap & BIT(2)) >> 2;
 992         res += (chain_bitmap & BIT(4)) >> 4;
 993         return res;
 994 }
 995
 996 /**
 997  * iwl_is_monitor_mode - Determine if interface in monitor mode
 998  *
 999  * priv->iw_mode is set in add_interface, but add_interface is
1000  * never called for monitor mode. The only way mac80211 informs us about
1001  * monitor mode is through configuring filters (call to configure_filter).
1002  */
1003 bool iwl_is_monitor_mode(struct iwl_priv *priv)
1004 {
1005         return !!(priv->staging_rxon.filter_flags & RXON_FILTER_PROMISC_MSK);
1006 }
1007 EXPORT_SYMBOL(iwl_is_monitor_mode);
1008
1009 /**
1010  * iwl_set_rxon_chain - Set up Rx chain usage in "staging" RXON image
1011  *
1012  * Selects how many and which Rx receivers/antennas/chains to use.
1013  * This should not be used for scan command ... it puts data in wrong place.
1014  */
1015 void iwl_set_rxon_chain(struct iwl_priv *priv)
1016 {
1017         bool is_single = is_single_rx_stream(priv);
1018         bool is_cam = !test_bit(STATUS_POWER_PMI, &priv->status);
1019         u8 idle_rx_cnt, active_rx_cnt, valid_rx_cnt;
1020         u32 active_chains;
1021         u16 rx_chain;
1022
1023         /* Tell uCode which antennas are actually connected.
1024          * Before first association, we assume all antennas are connected.
1025          * Just after first association, iwl_chain_noise_calibration()
1026          *    checks which antennas actually *are* connected. */
1027          if (priv->chain_noise_data.active_chains)
1028                 active_chains = priv->chain_noise_data.active_chains;
1029         else
1030                 active_chains = priv->hw_params.valid_rx_ant;
1031
1032         rx_chain = active_chains << RXON_RX_CHAIN_VALID_POS;
1033
1034         /* How many receivers should we use? */
1035         active_rx_cnt = iwl_get_active_rx_chain_count(priv);
1036         idle_rx_cnt = iwl_get_idle_rx_chain_count(priv, active_rx_cnt);
1037
1038
1039         /* correct rx chain count according hw settings
1040          * and chain noise calibration
1041          */
1042         valid_rx_cnt = iwl_count_chain_bitmap(active_chains);
1043         if (valid_rx_cnt < active_rx_cnt)
1044                 active_rx_cnt = valid_rx_cnt;
1045
1046         if (valid_rx_cnt < idle_rx_cnt)
1047                 idle_rx_cnt = valid_rx_cnt;
1048
1049         rx_chain |= active_rx_cnt << RXON_RX_CHAIN_MIMO_CNT_POS;
1050         rx_chain |= idle_rx_cnt  << RXON_RX_CHAIN_CNT_POS;
1051
1052         /* copied from 'iwl_bg_request_scan()' */
1053         /* Force use of chains B and C (0x6) for Rx for 4965
1054          * Avoid A (0x1) because of its off-channel reception on A-band.
1055          * MIMO is not used here, but value is required */
1056         if (iwl_is_monitor_mode(priv) &&
1057             !(priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) &&
1058             ((priv->hw_rev & CSR_HW_REV_TYPE_MSK) == CSR_HW_REV_TYPE_4965)) {
1059                 rx_chain = ANT_ABC << RXON_RX_CHAIN_VALID_POS;
1060                 rx_chain |= ANT_BC << RXON_RX_CHAIN_FORCE_SEL_POS;
1061                 rx_chain |= ANT_ABC << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS;
1062                 rx_chain |= 0x1 << RXON_RX_CHAIN_DRIVER_FORCE_POS;
1063         }
1064
1065         priv->staging_rxon.rx_chain = cpu_to_le16(rx_chain);
1066
1067         if (!is_single && (active_rx_cnt >= IWL_NUM_RX_CHAINS_SINGLE) && is_cam)
1068                 priv->staging_rxon.rx_chain |= RXON_RX_CHAIN_MIMO_FORCE_MSK;
1069         else
1070                 priv->staging_rxon.rx_chain &= ~RXON_RX_CHAIN_MIMO_FORCE_MSK;
1071
1072         IWL_DEBUG_ASSOC(priv, "rx_chain=0x%X active=%d idle=%d\n",
1073                         priv->staging_rxon.rx_chain,
1074                         active_rx_cnt, idle_rx_cnt);
1075
1076         WARN_ON(active_rx_cnt == 0 || idle_rx_cnt == 0 ||
1077                 active_rx_cnt < idle_rx_cnt);
1078 }
1079 EXPORT_SYMBOL(iwl_set_rxon_chain);
1080
1081 /**
1082  * iwl_set_rxon_channel - Set the phymode and channel values in staging RXON
1083  * @phymode: MODE_IEEE80211A sets to 5.2GHz; all else set to 2.4GHz
1084  * @channel: Any channel valid for the requested phymode
1085
1086  * In addition to setting the staging RXON, priv->phymode is also set.
1087  *
1088  * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
1089  * in the staging RXON flag structure based on the phymode
1090  */
1091 int iwl_set_rxon_channel(struct iwl_priv *priv, struct ieee80211_channel *ch)
1092 {
1093         enum ieee80211_band band = ch->band;
1094         u16 channel = ieee80211_frequency_to_channel(ch->center_freq);
1095
1096         if (!iwl_get_channel_info(priv, band, channel)) {
1097                 IWL_DEBUG_INFO(priv, "Could not set channel to %d [%d]\n",
1098                                channel, band);
1099                 return -EINVAL;
1100         }
1101
1102         if ((le16_to_cpu(priv->staging_rxon.channel) == channel) &&
1103             (priv->band == band))
1104                 return 0;
1105
1106         priv->staging_rxon.channel = cpu_to_le16(channel);
1107         if (band == IEEE80211_BAND_5GHZ)
1108                 priv->staging_rxon.flags &= ~RXON_FLG_BAND_24G_MSK;
1109         else
1110                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
1111
1112         priv->band = band;
1113
1114         IWL_DEBUG_INFO(priv, "Staging channel set to %d [%d]\n", channel, band);
1115
1116         return 0;
1117 }
1118 EXPORT_SYMBOL(iwl_set_rxon_channel);
1119
1120 void iwl_set_flags_for_band(struct iwl_priv *priv,
1121                             enum ieee80211_band band)
1122 {
1123         if (band == IEEE80211_BAND_5GHZ) {
1124                 priv->staging_rxon.flags &=
1125                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
1126                       | RXON_FLG_CCK_MSK);
1127                 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
1128         } else {
1129                 /* Copied from iwl_post_associate() */
1130                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
1131                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
1132                 else
1133                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
1134
1135                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
1136                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
1137
1138                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
1139                 priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
1140                 priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
1141         }
1142 }
1143 EXPORT_SYMBOL(iwl_set_flags_for_band);
1144
1145 /*
1146  * initialize rxon structure with default values from eeprom
1147  */
1148 void iwl_connection_init_rx_config(struct iwl_priv *priv, int mode)
1149 {
1150         const struct iwl_channel_info *ch_info;
1151
1152         memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
1153
1154         switch (mode) {
1155         case NL80211_IFTYPE_AP:
1156                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
1157                 break;
1158
1159         case NL80211_IFTYPE_STATION:
1160                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
1161                 priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
1162                 break;
1163
1164         case NL80211_IFTYPE_ADHOC:
1165                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
1166                 priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
1167                 priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
1168                                                   RXON_FILTER_ACCEPT_GRP_MSK;
1169                 break;
1170
1171         default:
1172                 IWL_ERR(priv, "Unsupported interface type %d\n", mode);
1173                 break;
1174         }
1175
1176 #if 0
1177         /* TODO:  Figure out when short_preamble would be set and cache from
1178          * that */
1179         if (!hw_to_local(priv->hw)->short_preamble)
1180                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
1181         else
1182                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
1183 #endif
1184
1185         ch_info = iwl_get_channel_info(priv, priv->band,
1186                                        le16_to_cpu(priv->active_rxon.channel));
1187
1188         if (!ch_info)
1189                 ch_info = &priv->channel_info[0];
1190
1191         /*
1192          * in some case A channels are all non IBSS
1193          * in this case force B/G channel
1194          */
1195         if ((priv->iw_mode == NL80211_IFTYPE_ADHOC) &&
1196             !(is_channel_ibss(ch_info)))
1197                 ch_info = &priv->channel_info[0];
1198
1199         priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
1200         priv->band = ch_info->band;
1201
1202         iwl_set_flags_for_band(priv, priv->band);
1203
1204         priv->staging_rxon.ofdm_basic_rates =
1205             (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
1206         priv->staging_rxon.cck_basic_rates =
1207             (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
1208
1209         /* clear both MIX and PURE40 mode flag */
1210         priv->staging_rxon.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED |
1211                                         RXON_FLG_CHANNEL_MODE_PURE_40);
1212         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
1213         memcpy(priv->staging_rxon.wlap_bssid_addr, priv->mac_addr, ETH_ALEN);
1214         priv->staging_rxon.ofdm_ht_single_stream_basic_rates = 0xff;
1215         priv->staging_rxon.ofdm_ht_dual_stream_basic_rates = 0xff;
1216         priv->staging_rxon.ofdm_ht_triple_stream_basic_rates = 0xff;
1217 }
1218 EXPORT_SYMBOL(iwl_connection_init_rx_config);
1219
1220 static void iwl_set_rate(struct iwl_priv *priv)
1221 {
1222         const struct ieee80211_supported_band *hw = NULL;
1223         struct ieee80211_rate *rate;
1224         int i;
1225
1226         hw = iwl_get_hw_mode(priv, priv->band);
1227         if (!hw) {
1228                 IWL_ERR(priv, "Failed to set rate: unable to get hw mode\n");
1229                 return;
1230         }
1231
1232         priv->active_rate = 0;
1233         priv->active_rate_basic = 0;
1234
1235         for (i = 0; i < hw->n_bitrates; i++) {
1236                 rate = &(hw->bitrates[i]);
1237                 if (rate->hw_value < IWL_RATE_COUNT)
1238                         priv->active_rate |= (1 << rate->hw_value);
1239         }
1240
1241         IWL_DEBUG_RATE(priv, "Set active_rate = %0x, active_rate_basic = %0x\n",
1242                        priv->active_rate, priv->active_rate_basic);
1243
1244         /*
1245          * If a basic rate is configured, then use it (adding IWL_RATE_1M_MASK)
1246          * otherwise set it to the default of all CCK rates and 6, 12, 24 for
1247          * OFDM
1248          */
1249         if (priv->active_rate_basic & IWL_CCK_BASIC_RATES_MASK)
1250                 priv->staging_rxon.cck_basic_rates =
1251                     ((priv->active_rate_basic &
1252                       IWL_CCK_RATES_MASK) >> IWL_FIRST_CCK_RATE) & 0xF;
1253         else
1254                 priv->staging_rxon.cck_basic_rates =
1255                     (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
1256
1257         if (priv->active_rate_basic & IWL_OFDM_BASIC_RATES_MASK)
1258                 priv->staging_rxon.ofdm_basic_rates =
1259                     ((priv->active_rate_basic &
1260                       (IWL_OFDM_BASIC_RATES_MASK | IWL_RATE_6M_MASK)) >>
1261                       IWL_FIRST_OFDM_RATE) & 0xFF;
1262         else
1263                 priv->staging_rxon.ofdm_basic_rates =
1264                    (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
1265 }
1266
1267 void iwl_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
1268 {
1269         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
1270         struct iwl_rxon_cmd *rxon = (void *)&priv->active_rxon;
1271         struct iwl_csa_notification *csa = &(pkt->u.csa_notif);
1272         IWL_DEBUG_11H(priv, "CSA notif: channel %d, status %d\n",
1273                       le16_to_cpu(csa->channel), le32_to_cpu(csa->status));
1274         rxon->channel = csa->channel;
1275         priv->staging_rxon.channel = csa->channel;
1276 }
1277 EXPORT_SYMBOL(iwl_rx_csa);
1278
1279 #ifdef CONFIG_IWLWIFI_DEBUG
1280 static void iwl_print_rx_config_cmd(struct iwl_priv *priv)
1281 {
1282         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
1283
1284         IWL_DEBUG_RADIO(priv, "RX CONFIG:\n");
1285         iwl_print_hex_dump(IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
1286         IWL_DEBUG_RADIO(priv, "u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
1287         IWL_DEBUG_RADIO(priv, "u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
1288         IWL_DEBUG_RADIO(priv, "u32 filter_flags: 0x%08x\n",
1289                         le32_to_cpu(rxon->filter_flags));
1290         IWL_DEBUG_RADIO(priv, "u8 dev_type: 0x%x\n", rxon->dev_type);
1291         IWL_DEBUG_RADIO(priv, "u8 ofdm_basic_rates: 0x%02x\n",
1292                         rxon->ofdm_basic_rates);
1293         IWL_DEBUG_RADIO(priv, "u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
1294         IWL_DEBUG_RADIO(priv, "u8[6] node_addr: %pM\n", rxon->node_addr);
1295         IWL_DEBUG_RADIO(priv, "u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
1296         IWL_DEBUG_RADIO(priv, "u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
1297 }
1298
1299 static const char *desc_lookup_text[] = {
1300         "OK",
1301         "FAIL",
1302         "BAD_PARAM",
1303         "BAD_CHECKSUM",
1304         "NMI_INTERRUPT_WDG",
1305         "SYSASSERT",
1306         "FATAL_ERROR",
1307         "BAD_COMMAND",
1308         "HW_ERROR_TUNE_LOCK",
1309         "HW_ERROR_TEMPERATURE",
1310         "ILLEGAL_CHAN_FREQ",
1311         "VCC_NOT_STABLE",
1312         "FH_ERROR",
1313         "NMI_INTERRUPT_HOST",
1314         "NMI_INTERRUPT_ACTION_PT",
1315         "NMI_INTERRUPT_UNKNOWN",
1316         "UCODE_VERSION_MISMATCH",
1317         "HW_ERROR_ABS_LOCK",
1318         "HW_ERROR_CAL_LOCK_FAIL",
1319         "NMI_INTERRUPT_INST_ACTION_PT",
1320         "NMI_INTERRUPT_DATA_ACTION_PT",
1321         "NMI_TRM_HW_ER",
1322         "NMI_INTERRUPT_TRM",
1323         "NMI_INTERRUPT_BREAK_POINT"
1324         "DEBUG_0",
1325         "DEBUG_1",
1326         "DEBUG_2",
1327         "DEBUG_3",
1328         "UNKNOWN"
1329 };
1330
1331 static const char *desc_lookup(int i)
1332 {
1333         int max = ARRAY_SIZE(desc_lookup_text) - 1;
1334
1335         if (i < 0 || i > max)
1336                 i = max;
1337
1338         return desc_lookup_text[i];
1339 }
1340
1341 #define ERROR_START_OFFSET  (1 * sizeof(u32))
1342 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
1343
1344 static void iwl_dump_nic_error_log(struct iwl_priv *priv)
1345 {
1346         u32 data2, line;
1347         u32 desc, time, count, base, data1;
1348         u32 blink1, blink2, ilink1, ilink2;
1349
1350         switch (priv->ucode_type) {
1351         case UCODE_RT:
1352                 base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
1353                 break;
1354         case UCODE_INIT:
1355                 base = le32_to_cpu(priv->card_alive_init.error_event_table_ptr);
1356                 break;
1357         default:
1358                 IWL_ERR(priv, "uCode image not available\n");
1359                 return;
1360         }
1361
1362         if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
1363                 IWL_ERR(priv, "Not valid error log pointer 0x%08X\n", base);
1364                 return;
1365         }
1366
1367         count = iwl_read_targ_mem(priv, base);
1368
1369         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
1370                 IWL_ERR(priv, "Start IWL Error Log Dump:\n");
1371                 IWL_ERR(priv, "Status: 0x%08lX, count: %d\n",
1372                         priv->status, count);
1373         }
1374
1375         desc = iwl_read_targ_mem(priv, base + 1 * sizeof(u32));
1376         blink1 = iwl_read_targ_mem(priv, base + 3 * sizeof(u32));
1377         blink2 = iwl_read_targ_mem(priv, base + 4 * sizeof(u32));
1378         ilink1 = iwl_read_targ_mem(priv, base + 5 * sizeof(u32));
1379         ilink2 = iwl_read_targ_mem(priv, base + 6 * sizeof(u32));
1380         data1 = iwl_read_targ_mem(priv, base + 7 * sizeof(u32));
1381         data2 = iwl_read_targ_mem(priv, base + 8 * sizeof(u32));
1382         line = iwl_read_targ_mem(priv, base + 9 * sizeof(u32));
1383         time = iwl_read_targ_mem(priv, base + 11 * sizeof(u32));
1384
1385         IWL_ERR(priv, "Desc                               Time       "
1386                 "data1      data2      line\n");
1387         IWL_ERR(priv, "%-28s (#%02d) %010u 0x%08X 0x%08X %u\n",
1388                 desc_lookup(desc), desc, time, data1, data2, line);
1389         IWL_ERR(priv, "blink1  blink2  ilink1  ilink2\n");
1390         IWL_ERR(priv, "0x%05X 0x%05X 0x%05X 0x%05X\n", blink1, blink2,
1391                 ilink1, ilink2);
1392
1393 }
1394
1395 #define EVENT_START_OFFSET  (4 * sizeof(u32))
1396
1397 /**
1398  * iwl_print_event_log - Dump error event log to syslog
1399  *
1400  */
1401 static void iwl_print_event_log(struct iwl_priv *priv, u32 start_idx,
1402                                 u32 num_events, u32 mode)
1403 {
1404         u32 i;
1405         u32 base;       /* SRAM byte address of event log header */
1406         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
1407         u32 ptr;        /* SRAM byte address of log data */
1408         u32 ev, time, data; /* event log data */
1409
1410         if (num_events == 0)
1411                 return;
1412         switch (priv->ucode_type) {
1413         case UCODE_RT:
1414                 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1415                 break;
1416         case UCODE_INIT:
1417                 base = le32_to_cpu(priv->card_alive_init.log_event_table_ptr);
1418                 break;
1419         default:
1420                 IWL_ERR(priv, "uCode image not available\n");
1421                 return;
1422         }
1423
1424         if (mode == 0)
1425                 event_size = 2 * sizeof(u32);
1426         else
1427                 event_size = 3 * sizeof(u32);
1428
1429         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
1430
1431         /* "time" is actually "data" for mode 0 (no timestamp).
1432         * place event id # at far right for easier visual parsing. */
1433         for (i = 0; i < num_events; i++) {
1434                 ev = iwl_read_targ_mem(priv, ptr);
1435                 ptr += sizeof(u32);
1436                 time = iwl_read_targ_mem(priv, ptr);
1437                 ptr += sizeof(u32);
1438                 if (mode == 0) {
1439                         /* data, ev */
1440                         IWL_ERR(priv, "EVT_LOG:0x%08x:%04u\n", time, ev);
1441                 } else {
1442                         data = iwl_read_targ_mem(priv, ptr);
1443                         ptr += sizeof(u32);
1444                         IWL_ERR(priv, "EVT_LOGT:%010u:0x%08x:%04u\n",
1445                                         time, data, ev);
1446                 }
1447         }
1448 }
1449
1450 void iwl_dump_nic_event_log(struct iwl_priv *priv)
1451 {
1452         u32 base;       /* SRAM byte address of event log header */
1453         u32 capacity;   /* event log capacity in # entries */
1454         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
1455         u32 num_wraps;  /* # times uCode wrapped to top of log */
1456         u32 next_entry; /* index of next entry to be written by uCode */
1457         u32 size;       /* # entries that we'll print */
1458
1459         switch (priv->ucode_type) {
1460         case UCODE_RT:
1461                 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1462                 break;
1463         case UCODE_INIT:
1464                 base = le32_to_cpu(priv->card_alive_init.log_event_table_ptr);
1465                 break;
1466         default:
1467                 IWL_ERR(priv, "uCode image not available\n");
1468                 return;
1469         }
1470
1471         if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
1472                 IWL_ERR(priv, "Invalid event log pointer 0x%08X\n", base);
1473                 return;
1474         }
1475
1476         /* event log header */
1477         capacity = iwl_read_targ_mem(priv, base);
1478         mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
1479         num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
1480         next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
1481
1482         size = num_wraps ? capacity : next_entry;
1483
1484         /* bail out if nothing in log */
1485         if (size == 0) {
1486                 IWL_ERR(priv, "Start IWL Event Log Dump: nothing in log\n");
1487                 return;
1488         }
1489
1490         IWL_ERR(priv, "Start IWL Event Log Dump: display count %d, wraps %d\n",
1491                         size, num_wraps);
1492
1493         /* if uCode has wrapped back to top of log, start at the oldest entry,
1494          * i.e the next one that uCode would fill. */
1495         if (num_wraps)
1496                 iwl_print_event_log(priv, next_entry,
1497                                         capacity - next_entry, mode);
1498         /* (then/else) start at top of log */
1499         iwl_print_event_log(priv, 0, next_entry, mode);
1500
1501 }
1502 #endif
1503 /**
1504  * iwl_irq_handle_error - called for HW or SW error interrupt from card
1505  */
1506 void iwl_irq_handle_error(struct iwl_priv *priv)
1507 {
1508         /* Set the FW error flag -- cleared on iwl_down */
1509         set_bit(STATUS_FW_ERROR, &priv->status);
1510
1511         /* Cancel currently queued command. */
1512         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
1513
1514 #ifdef CONFIG_IWLWIFI_DEBUG
1515         if (iwl_debug_level & IWL_DL_FW_ERRORS) {
1516                 iwl_dump_nic_error_log(priv);
1517                 iwl_dump_nic_event_log(priv);
1518                 iwl_print_rx_config_cmd(priv);
1519         }
1520 #endif
1521
1522         wake_up_interruptible(&priv->wait_command_queue);
1523
1524         /* Keep the restart process from trying to send host
1525          * commands by clearing the INIT status bit */
1526         clear_bit(STATUS_READY, &priv->status);
1527
1528         if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1529                 IWL_DEBUG(priv, IWL_DL_FW_ERRORS,
1530                           "Restarting adapter due to uCode error.\n");
1531
1532                 if (priv->cfg->mod_params->restart_fw)
1533                         queue_work(priv->workqueue, &priv->restart);
1534         }
1535 }
1536 EXPORT_SYMBOL(iwl_irq_handle_error);
1537
1538 void iwl_configure_filter(struct ieee80211_hw *hw,
1539                           unsigned int changed_flags,
1540                           unsigned int *total_flags,
1541                           int mc_count, struct dev_addr_list *mc_list)
1542 {
1543         struct iwl_priv *priv = hw->priv;
1544         __le32 *filter_flags = &priv->staging_rxon.filter_flags;
1545
1546         IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
1547                         changed_flags, *total_flags);
1548
1549         if (changed_flags & (FIF_OTHER_BSS | FIF_PROMISC_IN_BSS)) {
1550                 if (*total_flags & (FIF_OTHER_BSS | FIF_PROMISC_IN_BSS))
1551                         *filter_flags |= RXON_FILTER_PROMISC_MSK;
1552                 else
1553                         *filter_flags &= ~RXON_FILTER_PROMISC_MSK;
1554         }
1555         if (changed_flags & FIF_ALLMULTI) {
1556                 if (*total_flags & FIF_ALLMULTI)
1557                         *filter_flags |= RXON_FILTER_ACCEPT_GRP_MSK;
1558                 else
1559                         *filter_flags &= ~RXON_FILTER_ACCEPT_GRP_MSK;
1560         }
1561         if (changed_flags & FIF_CONTROL) {
1562                 if (*total_flags & FIF_CONTROL)
1563                         *filter_flags |= RXON_FILTER_CTL2HOST_MSK;
1564                 else
1565                         *filter_flags &= ~RXON_FILTER_CTL2HOST_MSK;
1566         }
1567         if (changed_flags & FIF_BCN_PRBRESP_PROMISC) {
1568                 if (*total_flags & FIF_BCN_PRBRESP_PROMISC)
1569                         *filter_flags |= RXON_FILTER_BCON_AWARE_MSK;
1570                 else
1571                         *filter_flags &= ~RXON_FILTER_BCON_AWARE_MSK;
1572         }
1573
1574         /* We avoid iwl_commit_rxon here to commit the new filter flags
1575          * since mac80211 will call ieee80211_hw_config immediately.
1576          * (mc_list is not supported at this time). Otherwise, we need to
1577          * queue a background iwl_commit_rxon work.
1578          */
1579
1580         *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
1581                         FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
1582 }
1583 EXPORT_SYMBOL(iwl_configure_filter);
1584
1585 int iwl_setup_mac(struct iwl_priv *priv)
1586 {
1587         int ret;
1588         struct ieee80211_hw *hw = priv->hw;
1589         hw->rate_control_algorithm = "iwl-agn-rs";
1590
1591         /* Tell mac80211 our characteristics */
1592         hw->flags = IEEE80211_HW_SIGNAL_DBM |
1593                     IEEE80211_HW_NOISE_DBM |
1594                     IEEE80211_HW_AMPDU_AGGREGATION |
1595                     IEEE80211_HW_SPECTRUM_MGMT |
1596                     IEEE80211_HW_SUPPORTS_PS;
1597         hw->wiphy->interface_modes =
1598                 BIT(NL80211_IFTYPE_STATION) |
1599                 BIT(NL80211_IFTYPE_ADHOC);
1600
1601         hw->wiphy->custom_regulatory = true;
1602
1603         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
1604         /* we create the 802.11 header and a zero-length SSID element */
1605         hw->wiphy->max_scan_ie_len = IWL_MAX_PROBE_REQUEST - 24 - 2;
1606
1607         /* Default value; 4 EDCA QOS priorities */
1608         hw->queues = 4;
1609
1610         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
1611
1612         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
1613                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
1614                         &priv->bands[IEEE80211_BAND_2GHZ];
1615         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
1616                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
1617                         &priv->bands[IEEE80211_BAND_5GHZ];
1618
1619         ret = ieee80211_register_hw(priv->hw);
1620         if (ret) {
1621                 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
1622                 return ret;
1623         }
1624         priv->mac80211_registered = 1;
1625
1626         return 0;
1627 }
1628 EXPORT_SYMBOL(iwl_setup_mac);
1629
1630 int iwl_set_hw_params(struct iwl_priv *priv)
1631 {
1632         priv->hw_params.max_rxq_size = RX_QUEUE_SIZE;
1633         priv->hw_params.max_rxq_log = RX_QUEUE_SIZE_LOG;
1634         if (priv->cfg->mod_params->amsdu_size_8K)
1635                 priv->hw_params.rx_buf_size = IWL_RX_BUF_SIZE_8K;
1636         else
1637                 priv->hw_params.rx_buf_size = IWL_RX_BUF_SIZE_4K;
1638         priv->hw_params.max_pkt_size = priv->hw_params.rx_buf_size - 256;
1639
1640         priv->hw_params.max_beacon_itrvl = IWL_MAX_UCODE_BEACON_INTERVAL;
1641
1642         if (priv->cfg->mod_params->disable_11n)
1643                 priv->cfg->sku &= ~IWL_SKU_N;
1644
1645         /* Device-specific setup */
1646         return priv->cfg->ops->lib->set_hw_params(priv);
1647 }
1648 EXPORT_SYMBOL(iwl_set_hw_params);
1649
1650 int iwl_init_drv(struct iwl_priv *priv)
1651 {
1652         int ret;
1653
1654         priv->ibss_beacon = NULL;
1655
1656         spin_lock_init(&priv->lock);
1657         spin_lock_init(&priv->sta_lock);
1658         spin_lock_init(&priv->hcmd_lock);
1659
1660         INIT_LIST_HEAD(&priv->free_frames);
1661
1662         mutex_init(&priv->mutex);
1663
1664         /* Clear the driver's (not device's) station table */
1665         iwl_clear_stations_table(priv);
1666
1667         priv->data_retry_limit = -1;
1668         priv->ieee_channels = NULL;
1669         priv->ieee_rates = NULL;
1670         priv->band = IEEE80211_BAND_2GHZ;
1671
1672         priv->iw_mode = NL80211_IFTYPE_STATION;
1673
1674         priv->current_ht_config.sm_ps = WLAN_HT_CAP_SM_PS_DISABLED;
1675
1676         /* Choose which receivers/antennas to use */
1677         if (priv->cfg->ops->hcmd->set_rxon_chain)
1678                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
1679
1680         iwl_init_scan_params(priv);
1681
1682         iwl_reset_qos(priv);
1683
1684         priv->qos_data.qos_active = 0;
1685         priv->qos_data.qos_cap.val = 0;
1686
1687         priv->rates_mask = IWL_RATES_MASK;
1688         /* If power management is turned on, default to CAM mode */
1689         priv->power_mode = IWL_POWER_MODE_CAM;
1690         priv->tx_power_user_lmt = IWL_TX_POWER_TARGET_POWER_MAX;
1691
1692         ret = iwl_init_channel_map(priv);
1693         if (ret) {
1694                 IWL_ERR(priv, "initializing regulatory failed: %d\n", ret);
1695                 goto err;
1696         }
1697
1698         ret = iwlcore_init_geos(priv);
1699         if (ret) {
1700                 IWL_ERR(priv, "initializing geos failed: %d\n", ret);
1701                 goto err_free_channel_map;
1702         }
1703         iwlcore_init_hw_rates(priv, priv->ieee_rates);
1704
1705         return 0;
1706
1707 err_free_channel_map:
1708         iwl_free_channel_map(priv);
1709 err:
1710         return ret;
1711 }
1712 EXPORT_SYMBOL(iwl_init_drv);
1713
1714 int iwl_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force)
1715 {
1716         int ret = 0;
1717         if (tx_power < IWL_TX_POWER_TARGET_POWER_MIN) {
1718                 IWL_WARN(priv, "Requested user TXPOWER %d below lower limit %d.\n",
1719                          tx_power,
1720                          IWL_TX_POWER_TARGET_POWER_MIN);
1721                 return -EINVAL;
1722         }
1723
1724         if (tx_power > IWL_TX_POWER_TARGET_POWER_MAX) {
1725                 IWL_WARN(priv, "Requested user TXPOWER %d above upper limit %d.\n",
1726                          tx_power,
1727                          IWL_TX_POWER_TARGET_POWER_MAX);
1728                 return -EINVAL;
1729         }
1730
1731         if (priv->tx_power_user_lmt != tx_power)
1732                 force = true;
1733
1734         priv->tx_power_user_lmt = tx_power;
1735
1736         /* if nic is not up don't send command */
1737         if (!iwl_is_ready_rf(priv))
1738                 return ret;
1739
1740         if (force && priv->cfg->ops->lib->send_tx_power)
1741                 ret = priv->cfg->ops->lib->send_tx_power(priv);
1742
1743         return ret;
1744 }
1745 EXPORT_SYMBOL(iwl_set_tx_power);
1746
1747 void iwl_uninit_drv(struct iwl_priv *priv)
1748 {
1749         iwl_calib_free_results(priv);
1750         iwlcore_free_geos(priv);
1751         iwl_free_channel_map(priv);
1752         kfree(priv->scan);
1753 }
1754 EXPORT_SYMBOL(iwl_uninit_drv);
1755
1756 #define ICT_COUNT (PAGE_SIZE/sizeof(u32))
1757
1758 /* Free dram table */
1759 void iwl_free_isr_ict(struct iwl_priv *priv)
1760 {
1761         if (priv->ict_tbl_vir) {
1762                 pci_free_consistent(priv->pci_dev, (sizeof(u32) * ICT_COUNT) +
1763                                         PAGE_SIZE, priv->ict_tbl_vir,
1764                                         priv->ict_tbl_dma);
1765                 priv->ict_tbl_vir = NULL;
1766         }
1767 }
1768 EXPORT_SYMBOL(iwl_free_isr_ict);
1769
1770
1771 /* allocate dram shared table it is a PAGE_SIZE aligned
1772  * also reset all data related to ICT table interrupt.
1773  */
1774 int iwl_alloc_isr_ict(struct iwl_priv *priv)
1775 {
1776
1777         if (priv->cfg->use_isr_legacy)
1778                 return 0;
1779         /* allocate shrared data table */
1780         priv->ict_tbl_vir = pci_alloc_consistent(priv->pci_dev, (sizeof(u32) *
1781                                                   ICT_COUNT) + PAGE_SIZE,
1782                                                   &priv->ict_tbl_dma);
1783         if (!priv->ict_tbl_vir)
1784                 return -ENOMEM;
1785
1786         /* align table to PAGE_SIZE boundry */
1787         priv->aligned_ict_tbl_dma = ALIGN(priv->ict_tbl_dma, PAGE_SIZE);
1788
1789         IWL_DEBUG_ISR(priv, "ict dma addr %Lx dma aligned %Lx diff %d\n",
1790                              (unsigned long long)priv->ict_tbl_dma,
1791                              (unsigned long long)priv->aligned_ict_tbl_dma,
1792                         (int)(priv->aligned_ict_tbl_dma - priv->ict_tbl_dma));
1793
1794         priv->ict_tbl =  priv->ict_tbl_vir +
1795                           (priv->aligned_ict_tbl_dma - priv->ict_tbl_dma);
1796
1797         IWL_DEBUG_ISR(priv, "ict vir addr %p vir aligned %p diff %d\n",
1798                              priv->ict_tbl, priv->ict_tbl_vir,
1799                         (int)(priv->aligned_ict_tbl_dma - priv->ict_tbl_dma));
1800
1801         /* reset table and index to all 0 */
1802         memset(priv->ict_tbl_vir,0, (sizeof(u32) * ICT_COUNT) + PAGE_SIZE);
1803         priv->ict_index = 0;
1804
1805         /* add periodic RX interrupt */
1806         priv->inta_mask |= CSR_INT_BIT_RX_PERIODIC;
1807         return 0;
1808 }
1809 EXPORT_SYMBOL(iwl_alloc_isr_ict);
1810
1811 /* Device is going up inform it about using ICT interrupt table,
1812  * also we need to tell the driver to start using ICT interrupt.
1813  */
1814 int iwl_reset_ict(struct iwl_priv *priv)
1815 {
1816         u32 val;
1817         unsigned long flags;
1818
1819         if (!priv->ict_tbl_vir)
1820                 return 0;
1821
1822         spin_lock_irqsave(&priv->lock, flags);
1823         iwl_disable_interrupts(priv);
1824
1825         memset(&priv->ict_tbl[0],0, sizeof(u32) * ICT_COUNT);
1826
1827         val = priv->aligned_ict_tbl_dma >> PAGE_SHIFT;
1828
1829         val |= CSR_DRAM_INT_TBL_ENABLE;
1830         val |= CSR_DRAM_INIT_TBL_WRAP_CHECK;
1831
1832         IWL_DEBUG_ISR(priv, "CSR_DRAM_INT_TBL_REG =0x%X "
1833                         "aligned dma address %Lx\n",
1834                         val, (unsigned long long)priv->aligned_ict_tbl_dma);
1835
1836         iwl_write32(priv, CSR_DRAM_INT_TBL_REG, val);
1837         priv->use_ict = true;
1838         priv->ict_index = 0;
1839         iwl_write32(priv, CSR_INT, priv->inta_mask);
1840         iwl_enable_interrupts(priv);
1841         spin_unlock_irqrestore(&priv->lock, flags);
1842
1843         return 0;
1844 }
1845 EXPORT_SYMBOL(iwl_reset_ict);
1846
1847 /* Device is going down disable ict interrupt usage */
1848 void iwl_disable_ict(struct iwl_priv *priv)
1849 {
1850         unsigned long flags;
1851
1852         spin_lock_irqsave(&priv->lock, flags);
1853         priv->use_ict = false;
1854         spin_unlock_irqrestore(&priv->lock, flags);
1855 }
1856 EXPORT_SYMBOL(iwl_disable_ict);
1857
1858 /* interrupt handler using ict table, with this interrupt driver will
1859  * stop using INTA register to get device's interrupt, reading this register
1860  * is expensive, device will write interrupts in ICT dram table, increment
1861  * index then will fire interrupt to driver, driver will OR all ICT table
1862  * entries from current index up to table entry with 0 value. the result is
1863  * the interrupt we need to service, driver will set the entries back to 0 and
1864  * set index.
1865  */
1866 irqreturn_t iwl_isr_ict(int irq, void *data)
1867 {
1868         struct iwl_priv *priv = data;
1869         u32 inta, inta_mask;
1870         u32 val = 0;
1871
1872         if (!priv)
1873                 return IRQ_NONE;
1874
1875         /* dram interrupt table not set yet,
1876          * use legacy interrupt.
1877          */
1878         if (!priv->use_ict)
1879                 return iwl_isr(irq, data);
1880
1881         spin_lock(&priv->lock);
1882
1883         /* Disable (but don't clear!) interrupts here to avoid
1884          * back-to-back ISRs and sporadic interrupts from our NIC.
1885          * If we have something to service, the tasklet will re-enable ints.
1886          * If we *don't* have something, we'll re-enable before leaving here.
1887          */
1888         inta_mask = iwl_read32(priv, CSR_INT_MASK);  /* just for debug */
1889         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
1890
1891
1892         /* Ignore interrupt if there's nothing in NIC to service.
1893          * This may be due to IRQ shared with another device,
1894          * or due to sporadic interrupts thrown from our NIC. */
1895         if (!priv->ict_tbl[priv->ict_index]) {
1896                 IWL_DEBUG_ISR(priv, "Ignore interrupt, inta == 0\n");
1897                 goto none;
1898         }
1899
1900         /* read all entries that not 0 start with ict_index */
1901         while (priv->ict_tbl[priv->ict_index]) {
1902
1903                 val |= priv->ict_tbl[priv->ict_index];
1904                 IWL_DEBUG_ISR(priv, "ICT index %d value 0x%08X\n",
1905                                         priv->ict_index,
1906                                         priv->ict_tbl[priv->ict_index]);
1907                 priv->ict_tbl[priv->ict_index] = 0;
1908                 priv->ict_index = iwl_queue_inc_wrap(priv->ict_index,
1909                                                                 ICT_COUNT);
1910
1911         }
1912
1913         /* We should not get this value, just ignore it. */
1914         if (val == 0xffffffff)
1915                 val = 0;
1916
1917         inta = (0xff & val) | ((0xff00 & val) << 16);
1918         IWL_DEBUG_ISR(priv, "ISR inta 0x%08x, enabled 0x%08x ict 0x%08x\n",
1919                         inta, inta_mask, val);
1920
1921         inta &= priv->inta_mask;
1922         priv->inta |= inta;
1923
1924         /* iwl_irq_tasklet() will service interrupts and re-enable them */
1925         if (likely(inta))
1926                 tasklet_schedule(&priv->irq_tasklet);
1927         else if (test_bit(STATUS_INT_ENABLED, &priv->status) && !priv->inta) {
1928                 /* Allow interrupt if was disabled by this handler and
1929                  * no tasklet was schedules, We should not enable interrupt,
1930                  * tasklet will enable it.
1931                  */
1932                 iwl_enable_interrupts(priv);
1933         }
1934
1935         spin_unlock(&priv->lock);
1936         return IRQ_HANDLED;
1937
1938  none:
1939         /* re-enable interrupts here since we don't have anything to service.
1940          * only Re-enable if disabled by irq.
1941          */
1942         if (test_bit(STATUS_INT_ENABLED, &priv->status) && !priv->inta)
1943                 iwl_enable_interrupts(priv);
1944
1945         spin_unlock(&priv->lock);
1946         return IRQ_NONE;
1947 }
1948 EXPORT_SYMBOL(iwl_isr_ict);
1949
1950
1951 static irqreturn_t iwl_isr(int irq, void *data)
1952 {
1953         struct iwl_priv *priv = data;
1954         u32 inta, inta_mask;
1955 #ifdef CONFIG_IWLWIFI_DEBUG
1956         u32 inta_fh;
1957 #endif
1958         if (!priv)
1959                 return IRQ_NONE;
1960
1961         spin_lock(&priv->lock);
1962
1963         /* Disable (but don't clear!) interrupts here to avoid
1964          *    back-to-back ISRs and sporadic interrupts from our NIC.
1965          * If we have something to service, the tasklet will re-enable ints.
1966          * If we *don't* have something, we'll re-enable before leaving here. */
1967         inta_mask = iwl_read32(priv, CSR_INT_MASK);  /* just for debug */
1968         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
1969
1970         /* Discover which interrupts are active/pending */
1971         inta = iwl_read32(priv, CSR_INT);
1972
1973         /* Ignore interrupt if there's nothing in NIC to service.
1974          * This may be due to IRQ shared with another device,
1975          * or due to sporadic interrupts thrown from our NIC. */
1976         if (!inta) {
1977                 IWL_DEBUG_ISR(priv, "Ignore interrupt, inta == 0\n");
1978                 goto none;
1979         }
1980
1981         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
1982                 /* Hardware disappeared. It might have already raised
1983                  * an interrupt */
1984                 IWL_WARN(priv, "HARDWARE GONE?? INTA == 0x%08x\n", inta);
1985                 goto unplugged;
1986         }
1987
1988 #ifdef CONFIG_IWLWIFI_DEBUG
1989         if (iwl_debug_level & (IWL_DL_ISR)) {
1990                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1991                 IWL_DEBUG_ISR(priv, "ISR inta 0x%08x, enabled 0x%08x, "
1992                               "fh 0x%08x\n", inta, inta_mask, inta_fh);
1993         }
1994 #endif
1995
1996         priv->inta |= inta;
1997         /* iwl_irq_tasklet() will service interrupts and re-enable them */
1998         if (likely(inta))
1999                 tasklet_schedule(&priv->irq_tasklet);
2000         else if (test_bit(STATUS_INT_ENABLED, &priv->status) && !priv->inta)
2001                 iwl_enable_interrupts(priv);
2002
2003  unplugged:
2004         spin_unlock(&priv->lock);
2005         return IRQ_HANDLED;
2006
2007  none:
2008         /* re-enable interrupts here since we don't have anything to service. */
2009         /* only Re-enable if diabled by irq  and no schedules tasklet. */
2010         if (test_bit(STATUS_INT_ENABLED, &priv->status) && !priv->inta)
2011                 iwl_enable_interrupts(priv);
2012
2013         spin_unlock(&priv->lock);
2014         return IRQ_NONE;
2015 }
2016
2017 irqreturn_t iwl_isr_legacy(int irq, void *data)
2018 {
2019         struct iwl_priv *priv = data;
2020         u32 inta, inta_mask;
2021         u32 inta_fh;
2022         if (!priv)
2023                 return IRQ_NONE;
2024
2025         spin_lock(&priv->lock);
2026
2027         /* Disable (but don't clear!) interrupts here to avoid
2028          *    back-to-back ISRs and sporadic interrupts from our NIC.
2029          * If we have something to service, the tasklet will re-enable ints.
2030          * If we *don't* have something, we'll re-enable before leaving here. */
2031         inta_mask = iwl_read32(priv, CSR_INT_MASK);  /* just for debug */
2032         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
2033
2034         /* Discover which interrupts are active/pending */
2035         inta = iwl_read32(priv, CSR_INT);
2036         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
2037
2038         /* Ignore interrupt if there's nothing in NIC to service.
2039          * This may be due to IRQ shared with another device,
2040          * or due to sporadic interrupts thrown from our NIC. */
2041         if (!inta && !inta_fh) {
2042                 IWL_DEBUG_ISR(priv, "Ignore interrupt, inta == 0, inta_fh == 0\n");
2043                 goto none;
2044         }
2045
2046         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
2047                 /* Hardware disappeared. It might have already raised
2048                  * an interrupt */
2049                 IWL_WARN(priv, "HARDWARE GONE?? INTA == 0x%08x\n", inta);
2050                 goto unplugged;
2051         }
2052
2053         IWL_DEBUG_ISR(priv, "ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
2054                       inta, inta_mask, inta_fh);
2055
2056         inta &= ~CSR_INT_BIT_SCD;
2057
2058         /* iwl_irq_tasklet() will service interrupts and re-enable them */
2059         if (likely(inta || inta_fh))
2060                 tasklet_schedule(&priv->irq_tasklet);
2061
2062  unplugged:
2063         spin_unlock(&priv->lock);
2064         return IRQ_HANDLED;
2065
2066  none:
2067         /* re-enable interrupts here since we don't have anything to service. */
2068         /* only Re-enable if diabled by irq */
2069         if (test_bit(STATUS_INT_ENABLED, &priv->status))
2070                 iwl_enable_interrupts(priv);
2071         spin_unlock(&priv->lock);
2072         return IRQ_NONE;
2073 }
2074 EXPORT_SYMBOL(iwl_isr_legacy);
2075
2076 int iwl_send_bt_config(struct iwl_priv *priv)
2077 {
2078         struct iwl_bt_cmd bt_cmd = {
2079                 .flags = 3,
2080                 .lead_time = 0xAA,
2081                 .max_kill = 1,
2082                 .kill_ack_mask = 0,
2083                 .kill_cts_mask = 0,
2084         };
2085
2086         return iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG,
2087                                 sizeof(struct iwl_bt_cmd), &bt_cmd);
2088 }
2089 EXPORT_SYMBOL(iwl_send_bt_config);
2090
2091 int iwl_send_statistics_request(struct iwl_priv *priv, u8 flags)
2092 {
2093         u32 stat_flags = 0;
2094         struct iwl_host_cmd cmd = {
2095                 .id = REPLY_STATISTICS_CMD,
2096                 .flags = flags,
2097                 .len = sizeof(stat_flags),
2098                 .data = (u8 *) &stat_flags,
2099         };
2100         return iwl_send_cmd(priv, &cmd);
2101 }
2102 EXPORT_SYMBOL(iwl_send_statistics_request);
2103
2104 /**
2105  * iwl_verify_inst_sparse - verify runtime uCode image in card vs. host,
2106  *   using sample data 100 bytes apart.  If these sample points are good,
2107  *   it's a pretty good bet that everything between them is good, too.
2108  */
2109 static int iwlcore_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
2110 {
2111         u32 val;
2112         int ret = 0;
2113         u32 errcnt = 0;
2114         u32 i;
2115
2116         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
2117
2118         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
2119                 /* read data comes through single port, auto-incr addr */
2120                 /* NOTE: Use the debugless read so we don't flood kernel log
2121                  * if IWL_DL_IO is set */
2122                 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
2123                         i + IWL49_RTC_INST_LOWER_BOUND);
2124                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
2125                 if (val != le32_to_cpu(*image)) {
2126                         ret = -EIO;
2127                         errcnt++;
2128                         if (errcnt >= 3)
2129                                 break;
2130                 }
2131         }
2132
2133         return ret;
2134 }
2135
2136 /**
2137  * iwlcore_verify_inst_full - verify runtime uCode image in card vs. host,
2138  *     looking at all data.
2139  */
2140 static int iwl_verify_inst_full(struct iwl_priv *priv, __le32 *image,
2141                                  u32 len)
2142 {
2143         u32 val;
2144         u32 save_len = len;
2145         int ret = 0;
2146         u32 errcnt;
2147
2148         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
2149
2150         iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
2151                            IWL49_RTC_INST_LOWER_BOUND);
2152
2153         errcnt = 0;
2154         for (; len > 0; len -= sizeof(u32), image++) {
2155                 /* read data comes through single port, auto-incr addr */
2156                 /* NOTE: Use the debugless read so we don't flood kernel log
2157                  * if IWL_DL_IO is set */
2158                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
2159                 if (val != le32_to_cpu(*image)) {
2160                         IWL_ERR(priv, "uCode INST section is invalid at "
2161                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
2162                                   save_len - len, val, le32_to_cpu(*image));
2163                         ret = -EIO;
2164                         errcnt++;
2165                         if (errcnt >= 20)
2166                                 break;
2167                 }
2168         }
2169
2170         if (!errcnt)
2171                 IWL_DEBUG_INFO(priv,
2172                     "ucode image in INSTRUCTION memory is good\n");
2173
2174         return ret;
2175 }
2176
2177 /**
2178  * iwl_verify_ucode - determine which instruction image is in SRAM,
2179  *    and verify its contents
2180  */
2181 int iwl_verify_ucode(struct iwl_priv *priv)
2182 {
2183         __le32 *image;
2184         u32 len;
2185         int ret;
2186
2187         /* Try bootstrap */
2188         image = (__le32 *)priv->ucode_boot.v_addr;
2189         len = priv->ucode_boot.len;
2190         ret = iwlcore_verify_inst_sparse(priv, image, len);
2191         if (!ret) {
2192                 IWL_DEBUG_INFO(priv, "Bootstrap uCode is good in inst SRAM\n");
2193                 return 0;
2194         }
2195
2196         /* Try initialize */
2197         image = (__le32 *)priv->ucode_init.v_addr;
2198         len = priv->ucode_init.len;
2199         ret = iwlcore_verify_inst_sparse(priv, image, len);
2200         if (!ret) {
2201                 IWL_DEBUG_INFO(priv, "Initialize uCode is good in inst SRAM\n");
2202                 return 0;
2203         }
2204
2205         /* Try runtime/protocol */
2206         image = (__le32 *)priv->ucode_code.v_addr;
2207         len = priv->ucode_code.len;
2208         ret = iwlcore_verify_inst_sparse(priv, image, len);
2209         if (!ret) {
2210                 IWL_DEBUG_INFO(priv, "Runtime uCode is good in inst SRAM\n");
2211                 return 0;
2212         }
2213
2214         IWL_ERR(priv, "NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
2215
2216         /* Since nothing seems to match, show first several data entries in
2217          * instruction SRAM, so maybe visual inspection will give a clue.
2218          * Selection of bootstrap image (vs. other images) is arbitrary. */
2219         image = (__le32 *)priv->ucode_boot.v_addr;
2220         len = priv->ucode_boot.len;
2221         ret = iwl_verify_inst_full(priv, image, len);
2222
2223         return ret;
2224 }
2225 EXPORT_SYMBOL(iwl_verify_ucode);
2226
2227
2228 void iwl_rf_kill_ct_config(struct iwl_priv *priv)
2229 {
2230         struct iwl_ct_kill_config cmd;
2231         struct iwl_ct_kill_throttling_config adv_cmd;
2232         unsigned long flags;
2233         int ret = 0;
2234
2235         spin_lock_irqsave(&priv->lock, flags);
2236         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
2237                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
2238         spin_unlock_irqrestore(&priv->lock, flags);
2239         priv->power_data.ct_kill_toggle = false;
2240
2241         switch (priv->hw_rev & CSR_HW_REV_TYPE_MSK) {
2242         case CSR_HW_REV_TYPE_1000:
2243         case CSR_HW_REV_TYPE_6x00:
2244         case CSR_HW_REV_TYPE_6x50:
2245                 adv_cmd.critical_temperature_enter =
2246                         cpu_to_le32(priv->hw_params.ct_kill_threshold);
2247                 adv_cmd.critical_temperature_exit =
2248                         cpu_to_le32(priv->hw_params.ct_kill_exit_threshold);
2249
2250                 ret = iwl_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD,
2251                                        sizeof(adv_cmd), &adv_cmd);
2252                 break;
2253         default:
2254                 cmd.critical_temperature_R =
2255                         cpu_to_le32(priv->hw_params.ct_kill_threshold);
2256
2257                 ret = iwl_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD,
2258                                        sizeof(cmd), &cmd);
2259                 break;
2260         }
2261         ret = iwl_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD,
2262                                sizeof(cmd), &cmd);
2263         if (ret)
2264                 IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
2265         else
2266                 IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD succeeded, "
2267                         "critical temperature is %d\n",
2268                         cmd.critical_temperature_R);
2269 }
2270 EXPORT_SYMBOL(iwl_rf_kill_ct_config);
2271
2272
2273 /*
2274  * CARD_STATE_CMD
2275  *
2276  * Use: Sets the device's internal card state to enable, disable, or halt
2277  *
2278  * When in the 'enable' state the card operates as normal.
2279  * When in the 'disable' state, the card enters into a low power mode.
2280  * When in the 'halt' state, the card is shut down and must be fully
2281  * restarted to come back on.
2282  */
2283 int iwl_send_card_state(struct iwl_priv *priv, u32 flags, u8 meta_flag)
2284 {
2285         struct iwl_host_cmd cmd = {
2286                 .id = REPLY_CARD_STATE_CMD,
2287                 .len = sizeof(u32),
2288                 .data = &flags,
2289                 .flags = meta_flag,
2290         };
2291
2292         return iwl_send_cmd(priv, &cmd);
2293 }
2294 EXPORT_SYMBOL(iwl_send_card_state);
2295
2296 void iwl_rx_pm_sleep_notif(struct iwl_priv *priv,
2297                            struct iwl_rx_mem_buffer *rxb)
2298 {
2299 #ifdef CONFIG_IWLWIFI_DEBUG
2300         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2301         struct iwl_sleep_notification *sleep = &(pkt->u.sleep_notif);
2302         IWL_DEBUG_RX(priv, "sleep mode: %d, src: %d\n",
2303                      sleep->pm_sleep_mode, sleep->pm_wakeup_src);
2304 #endif
2305 }
2306 EXPORT_SYMBOL(iwl_rx_pm_sleep_notif);
2307
2308 void iwl_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
2309                                       struct iwl_rx_mem_buffer *rxb)
2310 {
2311         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2312         IWL_DEBUG_RADIO(priv, "Dumping %d bytes of unhandled "
2313                         "notification for %s:\n",
2314                         le32_to_cpu(pkt->len), get_cmd_string(pkt->hdr.cmd));
2315         iwl_print_hex_dump(IWL_DL_RADIO, pkt->u.raw, le32_to_cpu(pkt->len));
2316 }
2317 EXPORT_SYMBOL(iwl_rx_pm_debug_statistics_notif);
2318
2319 void iwl_rx_reply_error(struct iwl_priv *priv,
2320                         struct iwl_rx_mem_buffer *rxb)
2321 {
2322         struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
2323
2324         IWL_ERR(priv, "Error Reply type 0x%08X cmd %s (0x%02X) "
2325                 "seq 0x%04X ser 0x%08X\n",
2326                 le32_to_cpu(pkt->u.err_resp.error_type),
2327                 get_cmd_string(pkt->u.err_resp.cmd_id),
2328                 pkt->u.err_resp.cmd_id,
2329                 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
2330                 le32_to_cpu(pkt->u.err_resp.error_info));
2331 }
2332 EXPORT_SYMBOL(iwl_rx_reply_error);
2333
2334 void iwl_clear_isr_stats(struct iwl_priv *priv)
2335 {
2336         memset(&priv->isr_stats, 0, sizeof(priv->isr_stats));
2337 }
2338 EXPORT_SYMBOL(iwl_clear_isr_stats);
2339
2340 int iwl_mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
2341                            const struct ieee80211_tx_queue_params *params)
2342 {
2343         struct iwl_priv *priv = hw->priv;
2344         unsigned long flags;
2345         int q;
2346
2347         IWL_DEBUG_MAC80211(priv, "enter\n");
2348
2349         if (!iwl_is_ready_rf(priv)) {
2350                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
2351                 return -EIO;
2352         }
2353
2354         if (queue >= AC_NUM) {
2355                 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
2356                 return 0;
2357         }
2358
2359         q = AC_NUM - 1 - queue;
2360
2361         spin_lock_irqsave(&priv->lock, flags);
2362
2363         priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
2364         priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
2365         priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
2366         priv->qos_data.def_qos_parm.ac[q].edca_txop =
2367                         cpu_to_le16((params->txop * 32));
2368
2369         priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
2370         priv->qos_data.qos_active = 1;
2371
2372         if (priv->iw_mode == NL80211_IFTYPE_AP)
2373                 iwl_activate_qos(priv, 1);
2374         else if (priv->assoc_id && iwl_is_associated(priv))
2375                 iwl_activate_qos(priv, 0);
2376
2377         spin_unlock_irqrestore(&priv->lock, flags);
2378
2379         IWL_DEBUG_MAC80211(priv, "leave\n");
2380         return 0;
2381 }
2382 EXPORT_SYMBOL(iwl_mac_conf_tx);
2383
2384 static void iwl_ht_conf(struct iwl_priv *priv,
2385                             struct ieee80211_bss_conf *bss_conf)
2386 {
2387         struct ieee80211_sta_ht_cap *ht_conf;
2388         struct iwl_ht_info *iwl_conf = &priv->current_ht_config;
2389         struct ieee80211_sta *sta;
2390
2391         IWL_DEBUG_MAC80211(priv, "enter: \n");
2392
2393         if (!iwl_conf->is_ht)
2394                 return;
2395
2396
2397         /*
2398          * It is totally wrong to base global information on something
2399          * that is valid only when associated, alas, this driver works
2400          * that way and I don't know how to fix it.
2401          */
2402
2403         rcu_read_lock();
2404         sta = ieee80211_find_sta(priv->hw, priv->bssid);
2405         if (!sta) {
2406                 rcu_read_unlock();
2407                 return;
2408         }
2409         ht_conf = &sta->ht_cap;
2410
2411         if (ht_conf->cap & IEEE80211_HT_CAP_SGI_20)
2412                 iwl_conf->sgf |= HT_SHORT_GI_20MHZ;
2413         if (ht_conf->cap & IEEE80211_HT_CAP_SGI_40)
2414                 iwl_conf->sgf |= HT_SHORT_GI_40MHZ;
2415
2416         iwl_conf->is_green_field = !!(ht_conf->cap & IEEE80211_HT_CAP_GRN_FLD);
2417         iwl_conf->max_amsdu_size =
2418                 !!(ht_conf->cap & IEEE80211_HT_CAP_MAX_AMSDU);
2419
2420         iwl_conf->supported_chan_width =
2421                 !!(ht_conf->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40);
2422
2423         /*
2424          * XXX: The HT configuration needs to be moved into iwl_mac_config()
2425          *      to be done there correctly.
2426          */
2427
2428         iwl_conf->extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE;
2429         if (conf_is_ht40_minus(&priv->hw->conf))
2430                 iwl_conf->extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2431         else if (conf_is_ht40_plus(&priv->hw->conf))
2432                 iwl_conf->extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2433
2434         /* If no above or below channel supplied disable FAT channel */
2435         if (iwl_conf->extension_chan_offset != IEEE80211_HT_PARAM_CHA_SEC_ABOVE &&
2436             iwl_conf->extension_chan_offset != IEEE80211_HT_PARAM_CHA_SEC_BELOW)
2437                 iwl_conf->supported_chan_width = 0;
2438
2439         iwl_conf->sm_ps = (u8)((ht_conf->cap & IEEE80211_HT_CAP_SM_PS) >> 2);
2440
2441         memcpy(&iwl_conf->mcs, &ht_conf->mcs, 16);
2442
2443         iwl_conf->tx_chan_width = iwl_conf->supported_chan_width != 0;
2444         iwl_conf->ht_protection =
2445                 bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_PROTECTION;
2446         iwl_conf->non_GF_STA_present =
2447                 !!(bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
2448
2449         rcu_read_unlock();
2450
2451         IWL_DEBUG_MAC80211(priv, "leave\n");
2452 }
2453
2454 #define IWL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6)
2455 void iwl_bss_info_changed(struct ieee80211_hw *hw,
2456                           struct ieee80211_vif *vif,
2457                           struct ieee80211_bss_conf *bss_conf,
2458                           u32 changes)
2459 {
2460         struct iwl_priv *priv = hw->priv;
2461         int ret;
2462
2463         IWL_DEBUG_MAC80211(priv, "changes = 0x%X\n", changes);
2464
2465         if (!iwl_is_alive(priv))
2466                 return;
2467
2468         mutex_lock(&priv->mutex);
2469
2470         if (changes & BSS_CHANGED_BEACON &&
2471             priv->iw_mode == NL80211_IFTYPE_AP) {
2472                 dev_kfree_skb(priv->ibss_beacon);
2473                 priv->ibss_beacon = ieee80211_beacon_get(hw, vif);
2474         }
2475
2476         if (changes & BSS_CHANGED_BEACON_INT) {
2477                 priv->beacon_int = bss_conf->beacon_int;
2478                 /* TODO: in AP mode, do something to make this take effect */
2479         }
2480
2481         if (changes & BSS_CHANGED_BSSID) {
2482                 IWL_DEBUG_MAC80211(priv, "BSSID %pM\n", bss_conf->bssid);
2483
2484                 /*
2485                  * If there is currently a HW scan going on in the
2486                  * background then we need to cancel it else the RXON
2487                  * below/in post_associate will fail.
2488                  */
2489                 if (iwl_scan_cancel_timeout(priv, 100)) {
2490                         IWL_WARN(priv, "Aborted scan still in progress after 100ms\n");
2491                         IWL_DEBUG_MAC80211(priv, "leaving - scan abort failed.\n");
2492                         mutex_unlock(&priv->mutex);
2493                         return;
2494                 }
2495
2496                 /* mac80211 only sets assoc when in STATION mode */
2497                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC ||
2498                     bss_conf->assoc) {
2499                         memcpy(priv->staging_rxon.bssid_addr,
2500                                bss_conf->bssid, ETH_ALEN);
2501
2502                         /* currently needed in a few places */
2503                         memcpy(priv->bssid, bss_conf->bssid, ETH_ALEN);
2504                 } else {
2505                         priv->staging_rxon.filter_flags &=
2506                                 ~RXON_FILTER_ASSOC_MSK;
2507                 }
2508
2509         }
2510
2511         /*
2512          * This needs to be after setting the BSSID in case
2513          * mac80211 decides to do both changes at once because
2514          * it will invoke post_associate.
2515          */
2516         if (priv->iw_mode == NL80211_IFTYPE_ADHOC &&
2517             changes & BSS_CHANGED_BEACON) {
2518                 struct sk_buff *beacon = ieee80211_beacon_get(hw, vif);
2519
2520                 if (beacon)
2521                         iwl_mac_beacon_update(hw, beacon);
2522         }
2523
2524         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
2525                 IWL_DEBUG_MAC80211(priv, "ERP_PREAMBLE %d\n",
2526                                    bss_conf->use_short_preamble);
2527                 if (bss_conf->use_short_preamble)
2528                         priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2529                 else
2530                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2531         }
2532
2533         if (changes & BSS_CHANGED_ERP_CTS_PROT) {
2534                 IWL_DEBUG_MAC80211(priv, "ERP_CTS %d\n", bss_conf->use_cts_prot);
2535                 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
2536                         priv->staging_rxon.flags |= RXON_FLG_TGG_PROTECT_MSK;
2537                 else
2538                         priv->staging_rxon.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
2539         }
2540
2541         if (changes & BSS_CHANGED_BASIC_RATES) {
2542                 /* XXX use this information
2543                  *
2544                  * To do that, remove code from iwl_set_rate() and put something
2545                  * like this here:
2546                  *
2547                 if (A-band)
2548                         priv->staging_rxon.ofdm_basic_rates =
2549                                 bss_conf->basic_rates;
2550                 else
2551                         priv->staging_rxon.ofdm_basic_rates =
2552                                 bss_conf->basic_rates >> 4;
2553                         priv->staging_rxon.cck_basic_rates =
2554                                 bss_conf->basic_rates & 0xF;
2555                  */
2556         }
2557
2558         if (changes & BSS_CHANGED_HT) {
2559                 iwl_ht_conf(priv, bss_conf);
2560
2561                 if (priv->cfg->ops->hcmd->set_rxon_chain)
2562                         priv->cfg->ops->hcmd->set_rxon_chain(priv);
2563         }
2564
2565         if (changes & BSS_CHANGED_ASSOC) {
2566                 IWL_DEBUG_MAC80211(priv, "ASSOC %d\n", bss_conf->assoc);
2567                 if (bss_conf->assoc) {
2568                         priv->assoc_id = bss_conf->aid;
2569                         priv->beacon_int = bss_conf->beacon_int;
2570                         priv->power_data.dtim_period = bss_conf->dtim_period;
2571                         priv->timestamp = bss_conf->timestamp;
2572                         priv->assoc_capability = bss_conf->assoc_capability;
2573
2574                         /*
2575                          * We have just associated, don't start scan too early
2576                          * leave time for EAPOL exchange to complete.
2577                          *
2578                          * XXX: do this in mac80211
2579                          */
2580                         priv->next_scan_jiffies = jiffies +
2581                                         IWL_DELAY_NEXT_SCAN_AFTER_ASSOC;
2582                         if (!iwl_is_rfkill(priv))
2583                                 priv->cfg->ops->lib->post_associate(priv);
2584                 } else
2585                         priv->assoc_id = 0;
2586
2587         }
2588
2589         if (changes && iwl_is_associated(priv) && priv->assoc_id) {
2590                 IWL_DEBUG_MAC80211(priv, "Changes (%#x) while associated\n",
2591                                    changes);
2592                 ret = iwl_send_rxon_assoc(priv);
2593                 if (!ret) {
2594                         /* Sync active_rxon with latest change. */
2595                         memcpy((void *)&priv->active_rxon,
2596                                 &priv->staging_rxon,
2597                                 sizeof(struct iwl_rxon_cmd));
2598                 }
2599         }
2600
2601         mutex_unlock(&priv->mutex);
2602
2603         IWL_DEBUG_MAC80211(priv, "leave\n");
2604 }
2605 EXPORT_SYMBOL(iwl_bss_info_changed);
2606
2607 int iwl_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb)
2608 {
2609         struct iwl_priv *priv = hw->priv;
2610         unsigned long flags;
2611         __le64 timestamp;
2612
2613         IWL_DEBUG_MAC80211(priv, "enter\n");
2614
2615         if (!iwl_is_ready_rf(priv)) {
2616                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
2617                 return -EIO;
2618         }
2619
2620         if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
2621                 IWL_DEBUG_MAC80211(priv, "leave - not IBSS\n");
2622                 return -EIO;
2623         }
2624
2625         spin_lock_irqsave(&priv->lock, flags);
2626
2627         if (priv->ibss_beacon)
2628                 dev_kfree_skb(priv->ibss_beacon);
2629
2630         priv->ibss_beacon = skb;
2631
2632         priv->assoc_id = 0;
2633         timestamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
2634         priv->timestamp = le64_to_cpu(timestamp);
2635
2636         IWL_DEBUG_MAC80211(priv, "leave\n");
2637         spin_unlock_irqrestore(&priv->lock, flags);
2638
2639         iwl_reset_qos(priv);
2640
2641         priv->cfg->ops->lib->post_associate(priv);
2642
2643
2644         return 0;
2645 }
2646 EXPORT_SYMBOL(iwl_mac_beacon_update);
2647
2648 int iwl_set_mode(struct iwl_priv *priv, int mode)
2649 {
2650         if (mode == NL80211_IFTYPE_ADHOC) {
2651                 const struct iwl_channel_info *ch_info;
2652
2653                 ch_info = iwl_get_channel_info(priv,
2654                         priv->band,
2655                         le16_to_cpu(priv->staging_rxon.channel));
2656
2657                 if (!ch_info || !is_channel_ibss(ch_info)) {
2658                         IWL_ERR(priv, "channel %d not IBSS channel\n",
2659                                   le16_to_cpu(priv->staging_rxon.channel));
2660                         return -EINVAL;
2661                 }
2662         }
2663
2664         iwl_connection_init_rx_config(priv, mode);
2665
2666         if (priv->cfg->ops->hcmd->set_rxon_chain)
2667                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
2668
2669         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2670
2671         iwl_clear_stations_table(priv);
2672
2673         /* dont commit rxon if rf-kill is on*/
2674         if (!iwl_is_ready_rf(priv))
2675                 return -EAGAIN;
2676
2677         iwlcore_commit_rxon(priv);
2678
2679         return 0;
2680 }
2681 EXPORT_SYMBOL(iwl_set_mode);
2682
2683 int iwl_mac_add_interface(struct ieee80211_hw *hw,
2684                                  struct ieee80211_if_init_conf *conf)
2685 {
2686         struct iwl_priv *priv = hw->priv;
2687         unsigned long flags;
2688
2689         IWL_DEBUG_MAC80211(priv, "enter: type %d\n", conf->type);
2690
2691         if (priv->vif) {
2692                 IWL_DEBUG_MAC80211(priv, "leave - vif != NULL\n");
2693                 return -EOPNOTSUPP;
2694         }
2695
2696         spin_lock_irqsave(&priv->lock, flags);
2697         priv->vif = conf->vif;
2698         priv->iw_mode = conf->type;
2699
2700         spin_unlock_irqrestore(&priv->lock, flags);
2701
2702         mutex_lock(&priv->mutex);
2703
2704         if (conf->mac_addr) {
2705                 IWL_DEBUG_MAC80211(priv, "Set %pM\n", conf->mac_addr);
2706                 memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
2707         }
2708
2709         if (iwl_set_mode(priv, conf->type) == -EAGAIN)
2710                 /* we are not ready, will run again when ready */
2711                 set_bit(STATUS_MODE_PENDING, &priv->status);
2712
2713         mutex_unlock(&priv->mutex);
2714
2715         IWL_DEBUG_MAC80211(priv, "leave\n");
2716         return 0;
2717 }
2718 EXPORT_SYMBOL(iwl_mac_add_interface);
2719
2720 void iwl_mac_remove_interface(struct ieee80211_hw *hw,
2721                                      struct ieee80211_if_init_conf *conf)
2722 {
2723         struct iwl_priv *priv = hw->priv;
2724
2725         IWL_DEBUG_MAC80211(priv, "enter\n");
2726
2727         mutex_lock(&priv->mutex);
2728
2729         if (iwl_is_ready_rf(priv)) {
2730                 iwl_scan_cancel_timeout(priv, 100);
2731                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2732                 iwlcore_commit_rxon(priv);
2733         }
2734         if (priv->vif == conf->vif) {
2735                 priv->vif = NULL;
2736                 memset(priv->bssid, 0, ETH_ALEN);
2737         }
2738         mutex_unlock(&priv->mutex);
2739
2740         IWL_DEBUG_MAC80211(priv, "leave\n");
2741
2742 }
2743 EXPORT_SYMBOL(iwl_mac_remove_interface);
2744
2745 /**
2746  * iwl_mac_config - mac80211 config callback
2747  *
2748  * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
2749  * be set inappropriately and the driver currently sets the hardware up to
2750  * use it whenever needed.
2751  */
2752 int iwl_mac_config(struct ieee80211_hw *hw, u32 changed)
2753 {
2754         struct iwl_priv *priv = hw->priv;
2755         const struct iwl_channel_info *ch_info;
2756         struct ieee80211_conf *conf = &hw->conf;
2757         unsigned long flags = 0;
2758         int ret = 0;
2759         u16 ch;
2760         int scan_active = 0;
2761
2762         mutex_lock(&priv->mutex);
2763
2764         IWL_DEBUG_MAC80211(priv, "enter to channel %d changed 0x%X\n",
2765                                         conf->channel->hw_value, changed);
2766
2767         if (unlikely(!priv->cfg->mod_params->disable_hw_scan &&
2768                         test_bit(STATUS_SCANNING, &priv->status))) {
2769                 scan_active = 1;
2770                 IWL_DEBUG_MAC80211(priv, "leave - scanning\n");
2771         }
2772
2773
2774         /* during scanning mac80211 will delay channel setting until
2775          * scan finish with changed = 0
2776          */
2777         if (!changed || (changed & IEEE80211_CONF_CHANGE_CHANNEL)) {
2778                 if (scan_active)
2779                         goto set_ch_out;
2780
2781                 ch = ieee80211_frequency_to_channel(conf->channel->center_freq);
2782                 ch_info = iwl_get_channel_info(priv, conf->channel->band, ch);
2783                 if (!is_channel_valid(ch_info)) {
2784                         IWL_DEBUG_MAC80211(priv, "leave - invalid channel\n");
2785                         ret = -EINVAL;
2786                         goto set_ch_out;
2787                 }
2788
2789                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC &&
2790                         !is_channel_ibss(ch_info)) {
2791                         IWL_ERR(priv, "channel %d in band %d not "
2792                                 "IBSS channel\n",
2793                                 conf->channel->hw_value, conf->channel->band);
2794                         ret = -EINVAL;
2795                         goto set_ch_out;
2796                 }
2797
2798                 priv->current_ht_config.is_ht = conf_is_ht(conf);
2799
2800                 spin_lock_irqsave(&priv->lock, flags);
2801
2802
2803                 /* if we are switching from ht to 2.4 clear flags
2804                  * from any ht related info since 2.4 does not
2805                  * support ht */
2806                 if ((le16_to_cpu(priv->staging_rxon.channel) != ch))
2807                         priv->staging_rxon.flags = 0;
2808
2809                 iwl_set_rxon_channel(priv, conf->channel);
2810
2811                 iwl_set_flags_for_band(priv, conf->channel->band);
2812                 spin_unlock_irqrestore(&priv->lock, flags);
2813  set_ch_out:
2814                 /* The list of supported rates and rate mask can be different
2815                  * for each band; since the band may have changed, reset
2816                  * the rate mask to what mac80211 lists */
2817                 iwl_set_rate(priv);
2818         }
2819
2820         if (changed & IEEE80211_CONF_CHANGE_PS &&
2821             priv->iw_mode == NL80211_IFTYPE_STATION) {
2822                 priv->power_data.power_disabled =
2823                         !(conf->flags & IEEE80211_CONF_PS);
2824                 ret = iwl_power_update_mode(priv, 0);
2825                 if (ret)
2826                         IWL_DEBUG_MAC80211(priv, "Error setting power level\n");
2827         }
2828
2829         if (changed & IEEE80211_CONF_CHANGE_POWER) {
2830                 IWL_DEBUG_MAC80211(priv, "TX Power old=%d new=%d\n",
2831                         priv->tx_power_user_lmt, conf->power_level);
2832
2833                 iwl_set_tx_power(priv, conf->power_level, false);
2834         }
2835
2836         /* call to ensure that 4965 rx_chain is set properly in monitor mode */
2837         if (priv->cfg->ops->hcmd->set_rxon_chain)
2838                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
2839
2840         if (!iwl_is_ready(priv)) {
2841                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2842                 goto out;
2843         }
2844
2845         if (scan_active)
2846                 goto out;
2847
2848         if (memcmp(&priv->active_rxon,
2849                    &priv->staging_rxon, sizeof(priv->staging_rxon)))
2850                 iwlcore_commit_rxon(priv);
2851         else
2852                 IWL_DEBUG_INFO(priv, "Not re-sending same RXON configuration.\n");
2853
2854
2855 out:
2856         IWL_DEBUG_MAC80211(priv, "leave\n");
2857         mutex_unlock(&priv->mutex);
2858         return ret;
2859 }
2860 EXPORT_SYMBOL(iwl_mac_config);
2861
2862 int iwl_mac_get_tx_stats(struct ieee80211_hw *hw,
2863                          struct ieee80211_tx_queue_stats *stats)
2864 {
2865         struct iwl_priv *priv = hw->priv;
2866         int i, avail;
2867         struct iwl_tx_queue *txq;
2868         struct iwl_queue *q;
2869         unsigned long flags;
2870
2871         IWL_DEBUG_MAC80211(priv, "enter\n");
2872
2873         if (!iwl_is_ready_rf(priv)) {
2874                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
2875                 return -EIO;
2876         }
2877
2878         spin_lock_irqsave(&priv->lock, flags);
2879
2880         for (i = 0; i < AC_NUM; i++) {
2881                 txq = &priv->txq[i];
2882                 q = &txq->q;
2883                 avail = iwl_queue_space(q);
2884
2885                 stats[i].len = q->n_window - avail;
2886                 stats[i].limit = q->n_window - q->high_mark;
2887                 stats[i].count = q->n_window;
2888
2889         }
2890         spin_unlock_irqrestore(&priv->lock, flags);
2891
2892         IWL_DEBUG_MAC80211(priv, "leave\n");
2893
2894         return 0;
2895 }
2896 EXPORT_SYMBOL(iwl_mac_get_tx_stats);
2897
2898 void iwl_mac_reset_tsf(struct ieee80211_hw *hw)
2899 {
2900         struct iwl_priv *priv = hw->priv;
2901         unsigned long flags;
2902
2903         mutex_lock(&priv->mutex);
2904         IWL_DEBUG_MAC80211(priv, "enter\n");
2905
2906         spin_lock_irqsave(&priv->lock, flags);
2907         memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_info));
2908         spin_unlock_irqrestore(&priv->lock, flags);
2909
2910         iwl_reset_qos(priv);
2911
2912         spin_lock_irqsave(&priv->lock, flags);
2913         priv->assoc_id = 0;
2914         priv->assoc_capability = 0;
2915         priv->assoc_station_added = 0;
2916
2917         /* new association get rid of ibss beacon skb */
2918         if (priv->ibss_beacon)
2919                 dev_kfree_skb(priv->ibss_beacon);
2920
2921         priv->ibss_beacon = NULL;
2922
2923         priv->beacon_int = priv->vif->bss_conf.beacon_int;
2924         priv->timestamp = 0;
2925         if ((priv->iw_mode == NL80211_IFTYPE_STATION))
2926                 priv->beacon_int = 0;
2927
2928         spin_unlock_irqrestore(&priv->lock, flags);
2929
2930         if (!iwl_is_ready_rf(priv)) {
2931                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2932                 mutex_unlock(&priv->mutex);
2933                 return;
2934         }
2935
2936         /* we are restarting association process
2937          * clear RXON_FILTER_ASSOC_MSK bit
2938          */
2939         if (priv->iw_mode != NL80211_IFTYPE_AP) {
2940                 iwl_scan_cancel_timeout(priv, 100);
2941                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2942                 iwlcore_commit_rxon(priv);
2943         }
2944
2945         if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
2946                 IWL_DEBUG_MAC80211(priv, "leave - not in IBSS\n");
2947                 mutex_unlock(&priv->mutex);
2948                 return;
2949         }
2950
2951         iwl_set_rate(priv);
2952
2953         mutex_unlock(&priv->mutex);
2954
2955         IWL_DEBUG_MAC80211(priv, "leave\n");
2956 }
2957 EXPORT_SYMBOL(iwl_mac_reset_tsf);
2958
2959 #ifdef CONFIG_PM
2960
2961 int iwl_pci_suspend(struct pci_dev *pdev, pm_message_t state)
2962 {
2963         struct iwl_priv *priv = pci_get_drvdata(pdev);
2964
2965         /*
2966          * This function is called when system goes into suspend state
2967          * mac80211 will call iwl_mac_stop() from the mac80211 suspend function
2968          * first but since iwl_mac_stop() has no knowledge of who the caller is,
2969          * it will not call apm_ops.stop() to stop the DMA operation.
2970          * Calling apm_ops.stop here to make sure we stop the DMA.
2971          */
2972         priv->cfg->ops->lib->apm_ops.stop(priv);
2973
2974         pci_save_state(pdev);
2975         pci_disable_device(pdev);
2976         pci_set_power_state(pdev, PCI_D3hot);
2977
2978         return 0;
2979 }
2980 EXPORT_SYMBOL(iwl_pci_suspend);
2981
2982 int iwl_pci_resume(struct pci_dev *pdev)
2983 {
2984         struct iwl_priv *priv = pci_get_drvdata(pdev);
2985         int ret;
2986
2987         pci_set_power_state(pdev, PCI_D0);
2988         ret = pci_enable_device(pdev);
2989         if (ret)
2990                 return ret;
2991         pci_restore_state(pdev);
2992         iwl_enable_interrupts(priv);
2993
2994         return 0;
2995 }
2996 EXPORT_SYMBOL(iwl_pci_resume);
2997
2998 #endif /* CONFIG_PM */