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 - 2010 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 <linux/sched.h>
  33 #include <net/mac80211.h>
  34
  35 #include "iwl-eeprom.h"
  36 #include "iwl-dev.h" /* FIXME: remove */
  37 #include "iwl-debug.h"
  38 #include "iwl-core.h"
  39 #include "iwl-io.h"
  40 #include "iwl-power.h"
  41 #include "iwl-sta.h"
  42 #include "iwl-helpers.h"
  43
  44
  45 MODULE_DESCRIPTION("iwl core");
  46 MODULE_VERSION(IWLWIFI_VERSION);
  47 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
  48 MODULE_LICENSE("GPL");
  49
  50 /*
  51  * set bt_coex_active to true, uCode will do kill/defer
  52  * every time the priority line is asserted (BT is sending signals on the
  53  * priority line in the PCIx).
  54  * set bt_coex_active to false, uCode will ignore the BT activity and
  55  * perform the normal operation
  56  *
  57  * User might experience transmit issue on some platform due to WiFi/BT
  58  * co-exist problem. The possible behaviors are:
  59  *   Able to scan and finding all the available AP
  60  *   Not able to associate with any AP
  61  * On those platforms, WiFi communication can be restored by set
  62  * "bt_coex_active" module parameter to "false"
  63  *
  64  * default: bt_coex_active = true (BT_COEX_ENABLE)
  65  */
  66 static bool bt_coex_active = true;
  67 module_param(bt_coex_active, bool, S_IRUGO);
  68 MODULE_PARM_DESC(bt_coex_active, "enable wifi/bluetooth co-exist\n");
  69
  70 static struct iwl_wimax_coex_event_entry cu_priorities[COEX_NUM_OF_EVENTS] = {
  71         {COEX_CU_UNASSOC_IDLE_RP, COEX_CU_UNASSOC_IDLE_WP,
  72          0, COEX_UNASSOC_IDLE_FLAGS},
  73         {COEX_CU_UNASSOC_MANUAL_SCAN_RP, COEX_CU_UNASSOC_MANUAL_SCAN_WP,
  74          0, COEX_UNASSOC_MANUAL_SCAN_FLAGS},
  75         {COEX_CU_UNASSOC_AUTO_SCAN_RP, COEX_CU_UNASSOC_AUTO_SCAN_WP,
  76          0, COEX_UNASSOC_AUTO_SCAN_FLAGS},
  77         {COEX_CU_CALIBRATION_RP, COEX_CU_CALIBRATION_WP,
  78          0, COEX_CALIBRATION_FLAGS},
  79         {COEX_CU_PERIODIC_CALIBRATION_RP, COEX_CU_PERIODIC_CALIBRATION_WP,
  80          0, COEX_PERIODIC_CALIBRATION_FLAGS},
  81         {COEX_CU_CONNECTION_ESTAB_RP, COEX_CU_CONNECTION_ESTAB_WP,
  82          0, COEX_CONNECTION_ESTAB_FLAGS},
  83         {COEX_CU_ASSOCIATED_IDLE_RP, COEX_CU_ASSOCIATED_IDLE_WP,
  84          0, COEX_ASSOCIATED_IDLE_FLAGS},
  85         {COEX_CU_ASSOC_MANUAL_SCAN_RP, COEX_CU_ASSOC_MANUAL_SCAN_WP,
  86          0, COEX_ASSOC_MANUAL_SCAN_FLAGS},
  87         {COEX_CU_ASSOC_AUTO_SCAN_RP, COEX_CU_ASSOC_AUTO_SCAN_WP,
  88          0, COEX_ASSOC_AUTO_SCAN_FLAGS},
  89         {COEX_CU_ASSOC_ACTIVE_LEVEL_RP, COEX_CU_ASSOC_ACTIVE_LEVEL_WP,
  90          0, COEX_ASSOC_ACTIVE_LEVEL_FLAGS},
  91         {COEX_CU_RF_ON_RP, COEX_CU_RF_ON_WP, 0, COEX_CU_RF_ON_FLAGS},
  92         {COEX_CU_RF_OFF_RP, COEX_CU_RF_OFF_WP, 0, COEX_RF_OFF_FLAGS},
  93         {COEX_CU_STAND_ALONE_DEBUG_RP, COEX_CU_STAND_ALONE_DEBUG_WP,
  94          0, COEX_STAND_ALONE_DEBUG_FLAGS},
  95         {COEX_CU_IPAN_ASSOC_LEVEL_RP, COEX_CU_IPAN_ASSOC_LEVEL_WP,
  96          0, COEX_IPAN_ASSOC_LEVEL_FLAGS},
  97         {COEX_CU_RSRVD1_RP, COEX_CU_RSRVD1_WP, 0, COEX_RSRVD1_FLAGS},
  98         {COEX_CU_RSRVD2_RP, COEX_CU_RSRVD2_WP, 0, COEX_RSRVD2_FLAGS}
  99 };
 100
 101 #define IWL_DECLARE_RATE_INFO(r, s, ip, in, rp, rn, pp, np)    \
 102         [IWL_RATE_##r##M_INDEX] = { IWL_RATE_##r##M_PLCP,      \
 103                                     IWL_RATE_SISO_##s##M_PLCP, \
 104                                     IWL_RATE_MIMO2_##s##M_PLCP,\
 105                                     IWL_RATE_MIMO3_##s##M_PLCP,\
 106                                     IWL_RATE_##r##M_IEEE,      \
 107                                     IWL_RATE_##ip##M_INDEX,    \
 108                                     IWL_RATE_##in##M_INDEX,    \
 109                                     IWL_RATE_##rp##M_INDEX,    \
 110                                     IWL_RATE_##rn##M_INDEX,    \
 111                                     IWL_RATE_##pp##M_INDEX,    \
 112                                     IWL_RATE_##np##M_INDEX }
 113
 114 u32 iwl_debug_level;
 115 EXPORT_SYMBOL(iwl_debug_level);
 116
 117 /*
 118  * Parameter order:
 119  *   rate, ht rate, prev rate, next rate, prev tgg rate, next tgg rate
 120  *
 121  * If there isn't a valid next or previous rate then INV is used which
 122  * maps to IWL_RATE_INVALID
 123  *
 124  */
 125 const struct iwl_rate_info iwl_rates[IWL_RATE_COUNT] = {
 126         IWL_DECLARE_RATE_INFO(1, INV, INV, 2, INV, 2, INV, 2),    /*  1mbps */
 127         IWL_DECLARE_RATE_INFO(2, INV, 1, 5, 1, 5, 1, 5),          /*  2mbps */
 128         IWL_DECLARE_RATE_INFO(5, INV, 2, 6, 2, 11, 2, 11),        /*5.5mbps */
 129         IWL_DECLARE_RATE_INFO(11, INV, 9, 12, 9, 12, 5, 18),      /* 11mbps */
 130         IWL_DECLARE_RATE_INFO(6, 6, 5, 9, 5, 11, 5, 11),        /*  6mbps */
 131         IWL_DECLARE_RATE_INFO(9, 6, 6, 11, 6, 11, 5, 11),       /*  9mbps */
 132         IWL_DECLARE_RATE_INFO(12, 12, 11, 18, 11, 18, 11, 18),   /* 12mbps */
 133         IWL_DECLARE_RATE_INFO(18, 18, 12, 24, 12, 24, 11, 24),   /* 18mbps */
 134         IWL_DECLARE_RATE_INFO(24, 24, 18, 36, 18, 36, 18, 36),   /* 24mbps */
 135         IWL_DECLARE_RATE_INFO(36, 36, 24, 48, 24, 48, 24, 48),   /* 36mbps */
 136         IWL_DECLARE_RATE_INFO(48, 48, 36, 54, 36, 54, 36, 54),   /* 48mbps */
 137         IWL_DECLARE_RATE_INFO(54, 54, 48, INV, 48, INV, 48, INV),/* 54mbps */
 138         IWL_DECLARE_RATE_INFO(60, 60, 48, INV, 48, INV, 48, INV),/* 60mbps */
 139         /* FIXME:RS:          ^^    should be INV (legacy) */
 140 };
 141 EXPORT_SYMBOL(iwl_rates);
 142
 143 /**
 144  * translate ucode response to mac80211 tx status control values
 145  */
 146 void iwl_hwrate_to_tx_control(struct iwl_priv *priv, u32 rate_n_flags,
 147                                   struct ieee80211_tx_info *info)
 148 {
 149         struct ieee80211_tx_rate *r = &info->control.rates[0];
 150
 151         info->antenna_sel_tx =
 152                 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
 153         if (rate_n_flags & RATE_MCS_HT_MSK)
 154                 r->flags |= IEEE80211_TX_RC_MCS;
 155         if (rate_n_flags & RATE_MCS_GF_MSK)
 156                 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
 157         if (rate_n_flags & RATE_MCS_HT40_MSK)
 158                 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
 159         if (rate_n_flags & RATE_MCS_DUP_MSK)
 160                 r->flags |= IEEE80211_TX_RC_DUP_DATA;
 161         if (rate_n_flags & RATE_MCS_SGI_MSK)
 162                 r->flags |= IEEE80211_TX_RC_SHORT_GI;
 163         r->idx = iwl_hwrate_to_mac80211_idx(rate_n_flags, info->band);
 164 }
 165 EXPORT_SYMBOL(iwl_hwrate_to_tx_control);
 166
 167 int iwl_hwrate_to_plcp_idx(u32 rate_n_flags)
 168 {
 169         int idx = 0;
 170
 171         /* HT rate format */
 172         if (rate_n_flags & RATE_MCS_HT_MSK) {
 173                 idx = (rate_n_flags & 0xff);
 174
 175                 if (idx >= IWL_RATE_MIMO3_6M_PLCP)
 176                         idx = idx - IWL_RATE_MIMO3_6M_PLCP;
 177                 else if (idx >= IWL_RATE_MIMO2_6M_PLCP)
 178                         idx = idx - IWL_RATE_MIMO2_6M_PLCP;
 179
 180                 idx += IWL_FIRST_OFDM_RATE;
 181                 /* skip 9M not supported in ht*/
 182                 if (idx >= IWL_RATE_9M_INDEX)
 183                         idx += 1;
 184                 if ((idx >= IWL_FIRST_OFDM_RATE) && (idx <= IWL_LAST_OFDM_RATE))
 185                         return idx;
 186
 187         /* legacy rate format, search for match in table */
 188         } else {
 189                 for (idx = 0; idx < ARRAY_SIZE(iwl_rates); idx++)
 190                         if (iwl_rates[idx].plcp == (rate_n_flags & 0xFF))
 191                                 return idx;
 192         }
 193
 194         return -1;
 195 }
 196 EXPORT_SYMBOL(iwl_hwrate_to_plcp_idx);
 197
 198 int iwl_hwrate_to_mac80211_idx(u32 rate_n_flags, enum ieee80211_band band)
 199 {
 200         int idx = 0;
 201         int band_offset = 0;
 202
 203         /* HT rate format: mac80211 wants an MCS number, which is just LSB */
 204         if (rate_n_flags & RATE_MCS_HT_MSK) {
 205                 idx = (rate_n_flags & 0xff);
 206                 return idx;
 207         /* Legacy rate format, search for match in table */
 208         } else {
 209                 if (band == IEEE80211_BAND_5GHZ)
 210                         band_offset = IWL_FIRST_OFDM_RATE;
 211                 for (idx = band_offset; idx < IWL_RATE_COUNT_LEGACY; idx++)
 212                         if (iwl_rates[idx].plcp == (rate_n_flags & 0xFF))
 213                                 return idx - band_offset;
 214         }
 215
 216         return -1;
 217 }
 218
 219 u8 iwl_toggle_tx_ant(struct iwl_priv *priv, u8 ant)
 220 {
 221         int i;
 222         u8 ind = ant;
 223         for (i = 0; i < RATE_ANT_NUM - 1; i++) {
 224                 ind = (ind + 1) < RATE_ANT_NUM ?  ind + 1 : 0;
 225                 if (priv->hw_params.valid_tx_ant & BIT(ind))
 226                         return ind;
 227         }
 228         return ant;
 229 }
 230 EXPORT_SYMBOL(iwl_toggle_tx_ant);
 231
 232 const u8 iwl_bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
 233 EXPORT_SYMBOL(iwl_bcast_addr);
 234
 235
 236 /* This function both allocates and initializes hw and priv. */
 237 struct ieee80211_hw *iwl_alloc_all(struct iwl_cfg *cfg,
 238                 struct ieee80211_ops *hw_ops)
 239 {
 240         struct iwl_priv *priv;
 241
 242         /* mac80211 allocates memory for this device instance, including
 243          *   space for this driver's private structure */
 244         struct ieee80211_hw *hw =
 245                 ieee80211_alloc_hw(sizeof(struct iwl_priv), hw_ops);
 246         if (hw == NULL) {
 247                 printk(KERN_ERR "%s: Can not allocate network device\n",
 248                        cfg->name);
 249                 goto out;
 250         }
 251
 252         priv = hw->priv;
 253         priv->hw = hw;
 254
 255 out:
 256         return hw;
 257 }
 258 EXPORT_SYMBOL(iwl_alloc_all);
 259
 260 void iwl_hw_detect(struct iwl_priv *priv)
 261 {
 262         priv->hw_rev = _iwl_read32(priv, CSR_HW_REV);
 263         priv->hw_wa_rev = _iwl_read32(priv, CSR_HW_REV_WA_REG);
 264         pci_read_config_byte(priv->pci_dev, PCI_REVISION_ID, &priv->rev_id);
 265 }
 266 EXPORT_SYMBOL(iwl_hw_detect);
 267
 268 int iwl_hw_nic_init(struct iwl_priv *priv)
 269 {
 270         unsigned long flags;
 271         struct iwl_rx_queue *rxq = &priv->rxq;
 272         int ret;
 273
 274         /* nic_init */
 275         spin_lock_irqsave(&priv->lock, flags);
 276         priv->cfg->ops->lib->apm_ops.init(priv);
 277
 278         /* Set interrupt coalescing calibration timer to default (512 usecs) */
 279         iwl_write8(priv, CSR_INT_COALESCING, IWL_HOST_INT_CALIB_TIMEOUT_DEF);
 280
 281         spin_unlock_irqrestore(&priv->lock, flags);
 282
 283         ret = priv->cfg->ops->lib->apm_ops.set_pwr_src(priv, IWL_PWR_SRC_VMAIN);
 284
 285         priv->cfg->ops->lib->apm_ops.config(priv);
 286
 287         /* Allocate the RX queue, or reset if it is already allocated */
 288         if (!rxq->bd) {
 289                 ret = iwl_rx_queue_alloc(priv);
 290                 if (ret) {
 291                         IWL_ERR(priv, "Unable to initialize Rx queue\n");
 292                         return -ENOMEM;
 293                 }
 294         } else
 295                 iwl_rx_queue_reset(priv, rxq);
 296
 297         iwl_rx_replenish(priv);
 298
 299         iwl_rx_init(priv, rxq);
 300
 301         spin_lock_irqsave(&priv->lock, flags);
 302
 303         rxq->need_update = 1;
 304         iwl_rx_queue_update_write_ptr(priv, rxq);
 305
 306         spin_unlock_irqrestore(&priv->lock, flags);
 307
 308         /* Allocate and init all Tx and Command queues */
 309         ret = iwl_txq_ctx_reset(priv);
 310         if (ret)
 311                 return ret;
 312
 313         set_bit(STATUS_INIT, &priv->status);
 314
 315         return 0;
 316 }
 317 EXPORT_SYMBOL(iwl_hw_nic_init);
 318
 319 /*
 320  * QoS  support
 321 */
 322 void iwl_activate_qos(struct iwl_priv *priv, u8 force)
 323 {
 324         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 325                 return;
 326
 327         priv->qos_data.def_qos_parm.qos_flags = 0;
 328
 329         if (priv->qos_data.qos_cap.q_AP.queue_request &&
 330             !priv->qos_data.qos_cap.q_AP.txop_request)
 331                 priv->qos_data.def_qos_parm.qos_flags |=
 332                         QOS_PARAM_FLG_TXOP_TYPE_MSK;
 333         if (priv->qos_data.qos_active)
 334                 priv->qos_data.def_qos_parm.qos_flags |=
 335                         QOS_PARAM_FLG_UPDATE_EDCA_MSK;
 336
 337         if (priv->current_ht_config.is_ht)
 338                 priv->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
 339
 340         if (force || iwl_is_associated(priv)) {
 341                 IWL_DEBUG_QOS(priv, "send QoS cmd with Qos active=%d FLAGS=0x%X\n",
 342                                 priv->qos_data.qos_active,
 343                                 priv->qos_data.def_qos_parm.qos_flags);
 344
 345                 iwl_send_cmd_pdu_async(priv, REPLY_QOS_PARAM,
 346                                        sizeof(struct iwl_qosparam_cmd),
 347                                        &priv->qos_data.def_qos_parm, NULL);
 348         }
 349 }
 350 EXPORT_SYMBOL(iwl_activate_qos);
 351
 352 /*
 353  * AC        CWmin         CW max      AIFSN      TXOP Limit    TXOP Limit
 354  *                                              (802.11b)      (802.11a/g)
 355  * AC_BK      15            1023        7           0               0
 356  * AC_BE      15            1023        3           0               0
 357  * AC_VI       7              15        2          6.016ms       3.008ms
 358  * AC_VO       3               7        2          3.264ms       1.504ms
 359  */
 360 void iwl_reset_qos(struct iwl_priv *priv)
 361 {
 362         u16 cw_min = 15;
 363         u16 cw_max = 1023;
 364         u8 aifs = 2;
 365         bool is_legacy = false;
 366         unsigned long flags;
 367         int i;
 368
 369         spin_lock_irqsave(&priv->lock, flags);
 370         /* QoS always active in AP and ADHOC mode
 371          * In STA mode wait for association
 372          */
 373         if (priv->iw_mode == NL80211_IFTYPE_ADHOC ||
 374             priv->iw_mode == NL80211_IFTYPE_AP)
 375                 priv->qos_data.qos_active = 1;
 376         else
 377                 priv->qos_data.qos_active = 0;
 378
 379         /* check for legacy mode */
 380         if ((priv->iw_mode == NL80211_IFTYPE_ADHOC &&
 381             (priv->active_rate & IWL_OFDM_RATES_MASK) == 0) ||
 382             (priv->iw_mode == NL80211_IFTYPE_STATION &&
 383             (priv->staging_rxon.flags & RXON_FLG_SHORT_SLOT_MSK) == 0)) {
 384                 cw_min = 31;
 385                 is_legacy = 1;
 386         }
 387
 388         if (priv->qos_data.qos_active)
 389                 aifs = 3;
 390
 391         /* AC_BE */
 392         priv->qos_data.def_qos_parm.ac[0].cw_min = cpu_to_le16(cw_min);
 393         priv->qos_data.def_qos_parm.ac[0].cw_max = cpu_to_le16(cw_max);
 394         priv->qos_data.def_qos_parm.ac[0].aifsn = aifs;
 395         priv->qos_data.def_qos_parm.ac[0].edca_txop = 0;
 396         priv->qos_data.def_qos_parm.ac[0].reserved1 = 0;
 397
 398         if (priv->qos_data.qos_active) {
 399                 /* AC_BK */
 400                 i = 1;
 401                 priv->qos_data.def_qos_parm.ac[i].cw_min = cpu_to_le16(cw_min);
 402                 priv->qos_data.def_qos_parm.ac[i].cw_max = cpu_to_le16(cw_max);
 403                 priv->qos_data.def_qos_parm.ac[i].aifsn = 7;
 404                 priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
 405                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
 406
 407                 /* AC_VI */
 408                 i = 2;
 409                 priv->qos_data.def_qos_parm.ac[i].cw_min =
 410                         cpu_to_le16((cw_min + 1) / 2 - 1);
 411                 priv->qos_data.def_qos_parm.ac[i].cw_max =
 412                         cpu_to_le16(cw_min);
 413                 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
 414                 if (is_legacy)
 415                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
 416                                 cpu_to_le16(6016);
 417                 else
 418                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
 419                                 cpu_to_le16(3008);
 420                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
 421
 422                 /* AC_VO */
 423                 i = 3;
 424                 priv->qos_data.def_qos_parm.ac[i].cw_min =
 425                         cpu_to_le16((cw_min + 1) / 4 - 1);
 426                 priv->qos_data.def_qos_parm.ac[i].cw_max =
 427                         cpu_to_le16((cw_min + 1) / 2 - 1);
 428                 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
 429                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
 430                 if (is_legacy)
 431                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
 432                                 cpu_to_le16(3264);
 433                 else
 434                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
 435                                 cpu_to_le16(1504);
 436         } else {
 437                 for (i = 1; i < 4; i++) {
 438                         priv->qos_data.def_qos_parm.ac[i].cw_min =
 439                                 cpu_to_le16(cw_min);
 440                         priv->qos_data.def_qos_parm.ac[i].cw_max =
 441                                 cpu_to_le16(cw_max);
 442                         priv->qos_data.def_qos_parm.ac[i].aifsn = aifs;
 443                         priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
 444                         priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
 445                 }
 446         }
 447         IWL_DEBUG_QOS(priv, "set QoS to default \n");
 448
 449         spin_unlock_irqrestore(&priv->lock, flags);
 450 }
 451 EXPORT_SYMBOL(iwl_reset_qos);
 452
 453 #define MAX_BIT_RATE_40_MHZ 150 /* Mbps */
 454 #define MAX_BIT_RATE_20_MHZ 72 /* Mbps */
 455 static void iwlcore_init_ht_hw_capab(const struct iwl_priv *priv,
 456                               struct ieee80211_sta_ht_cap *ht_info,
 457                               enum ieee80211_band band)
 458 {
 459         u16 max_bit_rate = 0;
 460         u8 rx_chains_num = priv->hw_params.rx_chains_num;
 461         u8 tx_chains_num = priv->hw_params.tx_chains_num;
 462
 463         ht_info->cap = 0;
 464         memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));
 465
 466         ht_info->ht_supported = true;
 467
 468         if (priv->cfg->ht_greenfield_support)
 469                 ht_info->cap |= IEEE80211_HT_CAP_GRN_FLD;
 470         ht_info->cap |= IEEE80211_HT_CAP_SGI_20;
 471         max_bit_rate = MAX_BIT_RATE_20_MHZ;
 472         if (priv->hw_params.ht40_channel & BIT(band)) {
 473                 ht_info->cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 474                 ht_info->cap |= IEEE80211_HT_CAP_SGI_40;
 475                 ht_info->mcs.rx_mask[4] = 0x01;
 476                 max_bit_rate = MAX_BIT_RATE_40_MHZ;
 477         }
 478
 479         if (priv->cfg->mod_params->amsdu_size_8K)
 480                 ht_info->cap |= IEEE80211_HT_CAP_MAX_AMSDU;
 481
 482         ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
 483         ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;
 484
 485         ht_info->mcs.rx_mask[0] = 0xFF;
 486         if (rx_chains_num >= 2)
 487                 ht_info->mcs.rx_mask[1] = 0xFF;
 488         if (rx_chains_num >= 3)
 489                 ht_info->mcs.rx_mask[2] = 0xFF;
 490
 491         /* Highest supported Rx data rate */
 492         max_bit_rate *= rx_chains_num;
 493         WARN_ON(max_bit_rate & ~IEEE80211_HT_MCS_RX_HIGHEST_MASK);
 494         ht_info->mcs.rx_highest = cpu_to_le16(max_bit_rate);
 495
 496         /* Tx MCS capabilities */
 497         ht_info->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
 498         if (tx_chains_num != rx_chains_num) {
 499                 ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
 500                 ht_info->mcs.tx_params |= ((tx_chains_num - 1) <<
 501                                 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT);
 502         }
 503 }
 504
 505 /**
 506  * iwlcore_init_geos - Initialize mac80211's geo/channel info based from eeprom
 507  */
 508 int iwlcore_init_geos(struct iwl_priv *priv)
 509 {
 510         struct iwl_channel_info *ch;
 511         struct ieee80211_supported_band *sband;
 512         struct ieee80211_channel *channels;
 513         struct ieee80211_channel *geo_ch;
 514         struct ieee80211_rate *rates;
 515         int i = 0;
 516
 517         if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
 518             priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
 519                 IWL_DEBUG_INFO(priv, "Geography modes already initialized.\n");
 520                 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
 521                 return 0;
 522         }
 523
 524         channels = kzalloc(sizeof(struct ieee80211_channel) *
 525                            priv->channel_count, GFP_KERNEL);
 526         if (!channels)
 527                 return -ENOMEM;
 528
 529         rates = kzalloc((sizeof(struct ieee80211_rate) * IWL_RATE_COUNT_LEGACY),
 530                         GFP_KERNEL);
 531         if (!rates) {
 532                 kfree(channels);
 533                 return -ENOMEM;
 534         }
 535
 536         /* 5.2GHz channels start after the 2.4GHz channels */
 537         sband = &priv->bands[IEEE80211_BAND_5GHZ];
 538         sband->channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)];
 539         /* just OFDM */
 540         sband->bitrates = &rates[IWL_FIRST_OFDM_RATE];
 541         sband->n_bitrates = IWL_RATE_COUNT_LEGACY - IWL_FIRST_OFDM_RATE;
 542
 543         if (priv->cfg->sku & IWL_SKU_N)
 544                 iwlcore_init_ht_hw_capab(priv, &sband->ht_cap,
 545                                          IEEE80211_BAND_5GHZ);
 546
 547         sband = &priv->bands[IEEE80211_BAND_2GHZ];
 548         sband->channels = channels;
 549         /* OFDM & CCK */
 550         sband->bitrates = rates;
 551         sband->n_bitrates = IWL_RATE_COUNT_LEGACY;
 552
 553         if (priv->cfg->sku & IWL_SKU_N)
 554                 iwlcore_init_ht_hw_capab(priv, &sband->ht_cap,
 555                                          IEEE80211_BAND_2GHZ);
 556
 557         priv->ieee_channels = channels;
 558         priv->ieee_rates = rates;
 559
 560         for (i = 0;  i < priv->channel_count; i++) {
 561                 ch = &priv->channel_info[i];
 562
 563                 /* FIXME: might be removed if scan is OK */
 564                 if (!is_channel_valid(ch))
 565                         continue;
 566
 567                 if (is_channel_a_band(ch))
 568                         sband =  &priv->bands[IEEE80211_BAND_5GHZ];
 569                 else
 570                         sband =  &priv->bands[IEEE80211_BAND_2GHZ];
 571
 572                 geo_ch = &sband->channels[sband->n_channels++];
 573
 574                 geo_ch->center_freq =
 575                                 ieee80211_channel_to_frequency(ch->channel);
 576                 geo_ch->max_power = ch->max_power_avg;
 577                 geo_ch->max_antenna_gain = 0xff;
 578                 geo_ch->hw_value = ch->channel;
 579
 580                 if (is_channel_valid(ch)) {
 581                         if (!(ch->flags & EEPROM_CHANNEL_IBSS))
 582                                 geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
 583
 584                         if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
 585                                 geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
 586
 587                         if (ch->flags & EEPROM_CHANNEL_RADAR)
 588                                 geo_ch->flags |= IEEE80211_CHAN_RADAR;
 589
 590                         geo_ch->flags |= ch->ht40_extension_channel;
 591
 592                         if (ch->max_power_avg > priv->tx_power_device_lmt)
 593                                 priv->tx_power_device_lmt = ch->max_power_avg;
 594                 } else {
 595                         geo_ch->flags |= IEEE80211_CHAN_DISABLED;
 596                 }
 597
 598                 IWL_DEBUG_INFO(priv, "Channel %d Freq=%d[%sGHz] %s flag=0x%X\n",
 599                                 ch->channel, geo_ch->center_freq,
 600                                 is_channel_a_band(ch) ?  "5.2" : "2.4",
 601                                 geo_ch->flags & IEEE80211_CHAN_DISABLED ?
 602                                 "restricted" : "valid",
 603                                  geo_ch->flags);
 604         }
 605
 606         if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) &&
 607              priv->cfg->sku & IWL_SKU_A) {
 608                 IWL_INFO(priv, "Incorrectly detected BG card as ABG. "
 609                         "Please send your PCI ID 0x%04X:0x%04X to maintainer.\n",
 610                            priv->pci_dev->device,
 611                            priv->pci_dev->subsystem_device);
 612                 priv->cfg->sku &= ~IWL_SKU_A;
 613         }
 614
 615         IWL_INFO(priv, "Tunable channels: %d 802.11bg, %d 802.11a channels\n",
 616                    priv->bands[IEEE80211_BAND_2GHZ].n_channels,
 617                    priv->bands[IEEE80211_BAND_5GHZ].n_channels);
 618
 619         set_bit(STATUS_GEO_CONFIGURED, &priv->status);
 620
 621         return 0;
 622 }
 623 EXPORT_SYMBOL(iwlcore_init_geos);
 624
 625 /*
 626  * iwlcore_free_geos - undo allocations in iwlcore_init_geos
 627  */
 628 void iwlcore_free_geos(struct iwl_priv *priv)
 629 {
 630         kfree(priv->ieee_channels);
 631         kfree(priv->ieee_rates);
 632         clear_bit(STATUS_GEO_CONFIGURED, &priv->status);
 633 }
 634 EXPORT_SYMBOL(iwlcore_free_geos);
 635
 636 /*
 637  *  iwlcore_rts_tx_cmd_flag: Set rts/cts. 3945 and 4965 only share this
 638  *  function.
 639  */
 640 void iwlcore_rts_tx_cmd_flag(struct ieee80211_tx_info *info,
 641                                 __le32 *tx_flags)
 642 {
 643         if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) {
 644                 *tx_flags |= TX_CMD_FLG_RTS_MSK;
 645                 *tx_flags &= ~TX_CMD_FLG_CTS_MSK;
 646         } else if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
 647                 *tx_flags &= ~TX_CMD_FLG_RTS_MSK;
 648                 *tx_flags |= TX_CMD_FLG_CTS_MSK;
 649         }
 650 }
 651 EXPORT_SYMBOL(iwlcore_rts_tx_cmd_flag);
 652
 653 static bool is_single_rx_stream(struct iwl_priv *priv)
 654 {
 655         return priv->current_ht_config.smps == IEEE80211_SMPS_STATIC ||
 656                priv->current_ht_config.single_chain_sufficient;
 657 }
 658
 659 static u8 iwl_is_channel_extension(struct iwl_priv *priv,
 660                                    enum ieee80211_band band,
 661                                    u16 channel, u8 extension_chan_offset)
 662 {
 663         const struct iwl_channel_info *ch_info;
 664
 665         ch_info = iwl_get_channel_info(priv, band, channel);
 666         if (!is_channel_valid(ch_info))
 667                 return 0;
 668
 669         if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE)
 670                 return !(ch_info->ht40_extension_channel &
 671                                         IEEE80211_CHAN_NO_HT40PLUS);
 672         else if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW)
 673                 return !(ch_info->ht40_extension_channel &
 674                                         IEEE80211_CHAN_NO_HT40MINUS);
 675
 676         return 0;
 677 }
 678
 679 u8 iwl_is_ht40_tx_allowed(struct iwl_priv *priv,
 680                          struct ieee80211_sta_ht_cap *sta_ht_inf)
 681 {
 682         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
 683
 684         if (!ht_conf->is_ht || !ht_conf->is_40mhz)
 685                 return 0;
 686
 687         /* We do not check for IEEE80211_HT_CAP_SUP_WIDTH_20_40
 688          * the bit will not set if it is pure 40MHz case
 689          */
 690         if (sta_ht_inf) {
 691                 if (!sta_ht_inf->ht_supported)
 692                         return 0;
 693         }
 694 #ifdef CONFIG_IWLWIFI_DEBUG
 695         if (priv->disable_ht40)
 696                 return 0;
 697 #endif
 698         return iwl_is_channel_extension(priv, priv->band,
 699                         le16_to_cpu(priv->staging_rxon.channel),
 700                         ht_conf->extension_chan_offset);
 701 }
 702 EXPORT_SYMBOL(iwl_is_ht40_tx_allowed);
 703
 704 static u16 iwl_adjust_beacon_interval(u16 beacon_val, u16 max_beacon_val)
 705 {
 706         u16 new_val = 0;
 707         u16 beacon_factor = 0;
 708
 709         beacon_factor = (beacon_val + max_beacon_val) / max_beacon_val;
 710         new_val = beacon_val / beacon_factor;
 711
 712         if (!new_val)
 713                 new_val = max_beacon_val;
 714
 715         return new_val;
 716 }
 717
 718 void iwl_setup_rxon_timing(struct iwl_priv *priv)
 719 {
 720         u64 tsf;
 721         s32 interval_tm, rem;
 722         unsigned long flags;
 723         struct ieee80211_conf *conf = NULL;
 724         u16 beacon_int;
 725
 726         conf = ieee80211_get_hw_conf(priv->hw);
 727
 728         spin_lock_irqsave(&priv->lock, flags);
 729         priv->rxon_timing.timestamp = cpu_to_le64(priv->timestamp);
 730         priv->rxon_timing.listen_interval = cpu_to_le16(conf->listen_interval);
 731
 732         if (priv->iw_mode == NL80211_IFTYPE_STATION) {
 733                 beacon_int = priv->beacon_int;
 734                 priv->rxon_timing.atim_window = 0;
 735         } else {
 736                 beacon_int = priv->vif->bss_conf.beacon_int;
 737
 738                 /* TODO: we need to get atim_window from upper stack
 739                  * for now we set to 0 */
 740                 priv->rxon_timing.atim_window = 0;
 741         }
 742
 743         beacon_int = iwl_adjust_beacon_interval(beacon_int,
 744                                 priv->hw_params.max_beacon_itrvl * 1024);
 745         priv->rxon_timing.beacon_interval = cpu_to_le16(beacon_int);
 746
 747         tsf = priv->timestamp; /* tsf is modifed by do_div: copy it */
 748         interval_tm = beacon_int * 1024;
 749         rem = do_div(tsf, interval_tm);
 750         priv->rxon_timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
 751
 752         spin_unlock_irqrestore(&priv->lock, flags);
 753         IWL_DEBUG_ASSOC(priv,
 754                         "beacon interval %d beacon timer %d beacon tim %d\n",
 755                         le16_to_cpu(priv->rxon_timing.beacon_interval),
 756                         le32_to_cpu(priv->rxon_timing.beacon_init_val),
 757                         le16_to_cpu(priv->rxon_timing.atim_window));
 758 }
 759 EXPORT_SYMBOL(iwl_setup_rxon_timing);
 760
 761 void iwl_set_rxon_hwcrypto(struct iwl_priv *priv, int hw_decrypt)
 762 {
 763         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
 764
 765         if (hw_decrypt)
 766                 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
 767         else
 768                 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
 769
 770 }
 771 EXPORT_SYMBOL(iwl_set_rxon_hwcrypto);
 772
 773 /**
 774  * iwl_check_rxon_cmd - validate RXON structure is valid
 775  *
 776  * NOTE:  This is really only useful during development and can eventually
 777  * be #ifdef'd out once the driver is stable and folks aren't actively
 778  * making changes
 779  */
 780 int iwl_check_rxon_cmd(struct iwl_priv *priv)
 781 {
 782         int error = 0;
 783         int counter = 1;
 784         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
 785
 786         if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
 787                 error |= le32_to_cpu(rxon->flags &
 788                                 (RXON_FLG_TGJ_NARROW_BAND_MSK |
 789                                  RXON_FLG_RADAR_DETECT_MSK));
 790                 if (error)
 791                         IWL_WARN(priv, "check 24G fields %d | %d\n",
 792                                     counter++, error);
 793         } else {
 794                 error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ?
 795                                 0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK);
 796                 if (error)
 797                         IWL_WARN(priv, "check 52 fields %d | %d\n",
 798                                     counter++, error);
 799                 error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK);
 800                 if (error)
 801                         IWL_WARN(priv, "check 52 CCK %d | %d\n",
 802                                     counter++, error);
 803         }
 804         error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1;
 805         if (error)
 806                 IWL_WARN(priv, "check mac addr %d | %d\n", counter++, error);
 807
 808         /* make sure basic rates 6Mbps and 1Mbps are supported */
 809         error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) &&
 810                   ((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0));
 811         if (error)
 812                 IWL_WARN(priv, "check basic rate %d | %d\n", counter++, error);
 813
 814         error |= (le16_to_cpu(rxon->assoc_id) > 2007);
 815         if (error)
 816                 IWL_WARN(priv, "check assoc id %d | %d\n", counter++, error);
 817
 818         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
 819                         == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK));
 820         if (error)
 821                 IWL_WARN(priv, "check CCK and short slot %d | %d\n",
 822                             counter++, error);
 823
 824         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
 825                         == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK));
 826         if (error)
 827                 IWL_WARN(priv, "check CCK & auto detect %d | %d\n",
 828                             counter++, error);
 829
 830         error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
 831                         RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK);
 832         if (error)
 833                 IWL_WARN(priv, "check TGG and auto detect %d | %d\n",
 834                             counter++, error);
 835
 836         if (error)
 837                 IWL_WARN(priv, "Tuning to channel %d\n",
 838                             le16_to_cpu(rxon->channel));
 839
 840         if (error) {
 841                 IWL_ERR(priv, "Not a valid iwl_rxon_assoc_cmd field values\n");
 842                 return -1;
 843         }
 844         return 0;
 845 }
 846 EXPORT_SYMBOL(iwl_check_rxon_cmd);
 847
 848 /**
 849  * iwl_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
 850  * @priv: staging_rxon is compared to active_rxon
 851  *
 852  * If the RXON structure is changing enough to require a new tune,
 853  * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
 854  * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
 855  */
 856 int iwl_full_rxon_required(struct iwl_priv *priv)
 857 {
 858
 859         /* These items are only settable from the full RXON command */
 860         if (!(iwl_is_associated(priv)) ||
 861             compare_ether_addr(priv->staging_rxon.bssid_addr,
 862                                priv->active_rxon.bssid_addr) ||
 863             compare_ether_addr(priv->staging_rxon.node_addr,
 864                                priv->active_rxon.node_addr) ||
 865             compare_ether_addr(priv->staging_rxon.wlap_bssid_addr,
 866                                priv->active_rxon.wlap_bssid_addr) ||
 867             (priv->staging_rxon.dev_type != priv->active_rxon.dev_type) ||
 868             (priv->staging_rxon.channel != priv->active_rxon.channel) ||
 869             (priv->staging_rxon.air_propagation !=
 870              priv->active_rxon.air_propagation) ||
 871             (priv->staging_rxon.ofdm_ht_single_stream_basic_rates !=
 872              priv->active_rxon.ofdm_ht_single_stream_basic_rates) ||
 873             (priv->staging_rxon.ofdm_ht_dual_stream_basic_rates !=
 874              priv->active_rxon.ofdm_ht_dual_stream_basic_rates) ||
 875             (priv->staging_rxon.ofdm_ht_triple_stream_basic_rates !=
 876              priv->active_rxon.ofdm_ht_triple_stream_basic_rates) ||
 877             (priv->staging_rxon.assoc_id != priv->active_rxon.assoc_id))
 878                 return 1;
 879
 880         /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
 881          * be updated with the RXON_ASSOC command -- however only some
 882          * flag transitions are allowed using RXON_ASSOC */
 883
 884         /* Check if we are not switching bands */
 885         if ((priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) !=
 886             (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK))
 887                 return 1;
 888
 889         /* Check if we are switching association toggle */
 890         if ((priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) !=
 891                 (priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK))
 892                 return 1;
 893
 894         return 0;
 895 }
 896 EXPORT_SYMBOL(iwl_full_rxon_required);
 897
 898 u8 iwl_rate_get_lowest_plcp(struct iwl_priv *priv)
 899 {
 900         int i;
 901         int rate_mask;
 902
 903         /* Set rate mask*/
 904         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)
 905                 rate_mask = priv->active_rate_basic & IWL_CCK_RATES_MASK;
 906         else
 907                 rate_mask = priv->active_rate_basic & IWL_OFDM_RATES_MASK;
 908
 909         /* Find lowest valid rate */
 910         for (i = IWL_RATE_1M_INDEX; i != IWL_RATE_INVALID;
 911                                         i = iwl_rates[i].next_ieee) {
 912                 if (rate_mask & (1 << i))
 913                         return iwl_rates[i].plcp;
 914         }
 915
 916         /* No valid rate was found. Assign the lowest one */
 917         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)
 918                 return IWL_RATE_1M_PLCP;
 919         else
 920                 return IWL_RATE_6M_PLCP;
 921 }
 922 EXPORT_SYMBOL(iwl_rate_get_lowest_plcp);
 923
 924 void iwl_set_rxon_ht(struct iwl_priv *priv, struct iwl_ht_config *ht_conf)
 925 {
 926         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
 927
 928         if (!ht_conf->is_ht) {
 929                 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
 930                         RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK |
 931                         RXON_FLG_HT40_PROT_MSK |
 932                         RXON_FLG_HT_PROT_MSK);
 933                 return;
 934         }
 935
 936         /* FIXME: if the definition of ht_protection changed, the "translation"
 937          * will be needed for rxon->flags
 938          */
 939         rxon->flags |= cpu_to_le32(ht_conf->ht_protection << RXON_FLG_HT_OPERATING_MODE_POS);
 940
 941         /* Set up channel bandwidth:
 942          * 20 MHz only, 20/40 mixed or pure 40 if ht40 ok */
 943         /* clear the HT channel mode before set the mode */
 944         rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
 945                          RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
 946         if (iwl_is_ht40_tx_allowed(priv, NULL)) {
 947                 /* pure ht40 */
 948                 if (ht_conf->ht_protection == IEEE80211_HT_OP_MODE_PROTECTION_20MHZ) {
 949                         rxon->flags |= RXON_FLG_CHANNEL_MODE_PURE_40;
 950                         /* Note: control channel is opposite of extension channel */
 951                         switch (ht_conf->extension_chan_offset) {
 952                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 953                                 rxon->flags &= ~RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
 954                                 break;
 955                         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 956                                 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
 957                                 break;
 958                         }
 959                 } else {
 960                         /* Note: control channel is opposite of extension channel */
 961                         switch (ht_conf->extension_chan_offset) {
 962                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 963                                 rxon->flags &= ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
 964                                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
 965                                 break;
 966                         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 967                                 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
 968                                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
 969                                 break;
 970                         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
 971                         default:
 972                                 /* channel location only valid if in Mixed mode */
 973                                 IWL_ERR(priv, "invalid extension channel offset\n");
 974                                 break;
 975                         }
 976                 }
 977         } else {
 978                 rxon->flags |= RXON_FLG_CHANNEL_MODE_LEGACY;
 979         }
 980
 981         if (priv->cfg->ops->hcmd->set_rxon_chain)
 982                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
 983
 984         IWL_DEBUG_ASSOC(priv, "rxon flags 0x%X operation mode :0x%X "
 985                         "extension channel offset 0x%x\n",
 986                         le32_to_cpu(rxon->flags), ht_conf->ht_protection,
 987                         ht_conf->extension_chan_offset);
 988         return;
 989 }
 990 EXPORT_SYMBOL(iwl_set_rxon_ht);
 991
 992 #define IWL_NUM_RX_CHAINS_MULTIPLE      3
 993 #define IWL_NUM_RX_CHAINS_SINGLE        2
 994 #define IWL_NUM_IDLE_CHAINS_DUAL        2
 995 #define IWL_NUM_IDLE_CHAINS_SINGLE      1
 996
 997 /*
 998  * Determine how many receiver/antenna chains to use.
 999  *
1000  * More provides better reception via diversity.  Fewer saves power
1001  * at the expense of throughput, but only when not in powersave to
1002  * start with.
1003  *
1004  * MIMO (dual stream) requires at least 2, but works better with 3.
1005  * This does not determine *which* chains to use, just how many.
1006  */
1007 static int iwl_get_active_rx_chain_count(struct iwl_priv *priv)
1008 {
1009         /* # of Rx chains to use when expecting MIMO. */
1010         if (is_single_rx_stream(priv))
1011                 return IWL_NUM_RX_CHAINS_SINGLE;
1012         else
1013                 return IWL_NUM_RX_CHAINS_MULTIPLE;
1014 }
1015
1016 /*
1017  * When we are in power saving mode, unless device support spatial
1018  * multiplexing power save, use the active count for rx chain count.
1019  */
1020 static int iwl_get_idle_rx_chain_count(struct iwl_priv *priv, int active_cnt)
1021 {
1022         /* # Rx chains when idling, depending on SMPS mode */
1023         switch (priv->current_ht_config.smps) {
1024         case IEEE80211_SMPS_STATIC:
1025         case IEEE80211_SMPS_DYNAMIC:
1026                 return IWL_NUM_IDLE_CHAINS_SINGLE;
1027         case IEEE80211_SMPS_OFF:
1028                 return active_cnt;
1029         default:
1030                 WARN(1, "invalid SMPS mode %d",
1031                      priv->current_ht_config.smps);
1032                 return active_cnt;
1033         }
1034 }
1035
1036 /* up to 4 chains */
1037 static u8 iwl_count_chain_bitmap(u32 chain_bitmap)
1038 {
1039         u8 res;
1040         res = (chain_bitmap & BIT(0)) >> 0;
1041         res += (chain_bitmap & BIT(1)) >> 1;
1042         res += (chain_bitmap & BIT(2)) >> 2;
1043         res += (chain_bitmap & BIT(3)) >> 3;
1044         return res;
1045 }
1046
1047 /**
1048  * iwl_is_monitor_mode - Determine if interface in monitor mode
1049  *
1050  * priv->iw_mode is set in add_interface, but add_interface is
1051  * never called for monitor mode. The only way mac80211 informs us about
1052  * monitor mode is through configuring filters (call to configure_filter).
1053  */
1054 bool iwl_is_monitor_mode(struct iwl_priv *priv)
1055 {
1056         return !!(priv->staging_rxon.filter_flags & RXON_FILTER_PROMISC_MSK);
1057 }
1058 EXPORT_SYMBOL(iwl_is_monitor_mode);
1059
1060 /**
1061  * iwl_set_rxon_chain - Set up Rx chain usage in "staging" RXON image
1062  *
1063  * Selects how many and which Rx receivers/antennas/chains to use.
1064  * This should not be used for scan command ... it puts data in wrong place.
1065  */
1066 void iwl_set_rxon_chain(struct iwl_priv *priv)
1067 {
1068         bool is_single = is_single_rx_stream(priv);
1069         bool is_cam = !test_bit(STATUS_POWER_PMI, &priv->status);
1070         u8 idle_rx_cnt, active_rx_cnt, valid_rx_cnt;
1071         u32 active_chains;
1072         u16 rx_chain;
1073
1074         /* Tell uCode which antennas are actually connected.
1075          * Before first association, we assume all antennas are connected.
1076          * Just after first association, iwl_chain_noise_calibration()
1077          *    checks which antennas actually *are* connected. */
1078          if (priv->chain_noise_data.active_chains)
1079                 active_chains = priv->chain_noise_data.active_chains;
1080         else
1081                 active_chains = priv->hw_params.valid_rx_ant;
1082
1083         rx_chain = active_chains << RXON_RX_CHAIN_VALID_POS;
1084
1085         /* How many receivers should we use? */
1086         active_rx_cnt = iwl_get_active_rx_chain_count(priv);
1087         idle_rx_cnt = iwl_get_idle_rx_chain_count(priv, active_rx_cnt);
1088
1089
1090         /* correct rx chain count according hw settings
1091          * and chain noise calibration
1092          */
1093         valid_rx_cnt = iwl_count_chain_bitmap(active_chains);
1094         if (valid_rx_cnt < active_rx_cnt)
1095                 active_rx_cnt = valid_rx_cnt;
1096
1097         if (valid_rx_cnt < idle_rx_cnt)
1098                 idle_rx_cnt = valid_rx_cnt;
1099
1100         rx_chain |= active_rx_cnt << RXON_RX_CHAIN_MIMO_CNT_POS;
1101         rx_chain |= idle_rx_cnt  << RXON_RX_CHAIN_CNT_POS;
1102
1103         /* copied from 'iwl_bg_request_scan()' */
1104         /* Force use of chains B and C (0x6) for Rx for 4965
1105          * Avoid A (0x1) because of its off-channel reception on A-band.
1106          * MIMO is not used here, but value is required */
1107         if (iwl_is_monitor_mode(priv) &&
1108             !(priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) &&
1109             ((priv->hw_rev & CSR_HW_REV_TYPE_MSK) == CSR_HW_REV_TYPE_4965)) {
1110                 rx_chain = ANT_ABC << RXON_RX_CHAIN_VALID_POS;
1111                 rx_chain |= ANT_BC << RXON_RX_CHAIN_FORCE_SEL_POS;
1112                 rx_chain |= ANT_ABC << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS;
1113                 rx_chain |= 0x1 << RXON_RX_CHAIN_DRIVER_FORCE_POS;
1114         }
1115
1116         priv->staging_rxon.rx_chain = cpu_to_le16(rx_chain);
1117
1118         if (!is_single && (active_rx_cnt >= IWL_NUM_RX_CHAINS_SINGLE) && is_cam)
1119                 priv->staging_rxon.rx_chain |= RXON_RX_CHAIN_MIMO_FORCE_MSK;
1120         else
1121                 priv->staging_rxon.rx_chain &= ~RXON_RX_CHAIN_MIMO_FORCE_MSK;
1122
1123         IWL_DEBUG_ASSOC(priv, "rx_chain=0x%X active=%d idle=%d\n",
1124                         priv->staging_rxon.rx_chain,
1125                         active_rx_cnt, idle_rx_cnt);
1126
1127         WARN_ON(active_rx_cnt == 0 || idle_rx_cnt == 0 ||
1128                 active_rx_cnt < idle_rx_cnt);
1129 }
1130 EXPORT_SYMBOL(iwl_set_rxon_chain);
1131
1132 /**
1133  * iwl_set_rxon_channel - Set the phymode and channel values in staging RXON
1134  * @phymode: MODE_IEEE80211A sets to 5.2GHz; all else set to 2.4GHz
1135  * @channel: Any channel valid for the requested phymode
1136
1137  * In addition to setting the staging RXON, priv->phymode is also set.
1138  *
1139  * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
1140  * in the staging RXON flag structure based on the phymode
1141  */
1142 int iwl_set_rxon_channel(struct iwl_priv *priv, struct ieee80211_channel *ch)
1143 {
1144         enum ieee80211_band band = ch->band;
1145         u16 channel = ieee80211_frequency_to_channel(ch->center_freq);
1146
1147         if (!iwl_get_channel_info(priv, band, channel)) {
1148                 IWL_DEBUG_INFO(priv, "Could not set channel to %d [%d]\n",
1149                                channel, band);
1150                 return -EINVAL;
1151         }
1152
1153         if ((le16_to_cpu(priv->staging_rxon.channel) == channel) &&
1154             (priv->band == band))
1155                 return 0;
1156
1157         priv->staging_rxon.channel = cpu_to_le16(channel);
1158         if (band == IEEE80211_BAND_5GHZ)
1159                 priv->staging_rxon.flags &= ~RXON_FLG_BAND_24G_MSK;
1160         else
1161                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
1162
1163         priv->band = band;
1164
1165         IWL_DEBUG_INFO(priv, "Staging channel set to %d [%d]\n", channel, band);
1166
1167         return 0;
1168 }
1169 EXPORT_SYMBOL(iwl_set_rxon_channel);
1170
1171 void iwl_set_flags_for_band(struct iwl_priv *priv,
1172                             enum ieee80211_band band)
1173 {
1174         if (band == IEEE80211_BAND_5GHZ) {
1175                 priv->staging_rxon.flags &=
1176                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
1177                       | RXON_FLG_CCK_MSK);
1178                 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
1179         } else {
1180                 /* Copied from iwl_post_associate() */
1181                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
1182                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
1183                 else
1184                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
1185
1186                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
1187                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
1188
1189                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
1190                 priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
1191                 priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
1192         }
1193 }
1194
1195 /*
1196  * initialize rxon structure with default values from eeprom
1197  */
1198 void iwl_connection_init_rx_config(struct iwl_priv *priv, int mode)
1199 {
1200         const struct iwl_channel_info *ch_info;
1201
1202         memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
1203
1204         switch (mode) {
1205         case NL80211_IFTYPE_AP:
1206                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
1207                 break;
1208
1209         case NL80211_IFTYPE_STATION:
1210                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
1211                 priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
1212                 break;
1213
1214         case NL80211_IFTYPE_ADHOC:
1215                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
1216                 priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
1217                 priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
1218                                                   RXON_FILTER_ACCEPT_GRP_MSK;
1219                 break;
1220
1221         default:
1222                 IWL_ERR(priv, "Unsupported interface type %d\n", mode);
1223                 break;
1224         }
1225
1226 #if 0
1227         /* TODO:  Figure out when short_preamble would be set and cache from
1228          * that */
1229         if (!hw_to_local(priv->hw)->short_preamble)
1230                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
1231         else
1232                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
1233 #endif
1234
1235         ch_info = iwl_get_channel_info(priv, priv->band,
1236                                        le16_to_cpu(priv->active_rxon.channel));
1237
1238         if (!ch_info)
1239                 ch_info = &priv->channel_info[0];
1240
1241         /*
1242          * in some case A channels are all non IBSS
1243          * in this case force B/G channel
1244          */
1245         if ((priv->iw_mode == NL80211_IFTYPE_ADHOC) &&
1246             !(is_channel_ibss(ch_info)))
1247                 ch_info = &priv->channel_info[0];
1248
1249         priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
1250         priv->band = ch_info->band;
1251
1252         iwl_set_flags_for_band(priv, priv->band);
1253
1254         priv->staging_rxon.ofdm_basic_rates =
1255             (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
1256         priv->staging_rxon.cck_basic_rates =
1257             (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
1258
1259         /* clear both MIX and PURE40 mode flag */
1260         priv->staging_rxon.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED |
1261                                         RXON_FLG_CHANNEL_MODE_PURE_40);
1262         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
1263         memcpy(priv->staging_rxon.wlap_bssid_addr, priv->mac_addr, ETH_ALEN);
1264         priv->staging_rxon.ofdm_ht_single_stream_basic_rates = 0xff;
1265         priv->staging_rxon.ofdm_ht_dual_stream_basic_rates = 0xff;
1266         priv->staging_rxon.ofdm_ht_triple_stream_basic_rates = 0xff;
1267 }
1268 EXPORT_SYMBOL(iwl_connection_init_rx_config);
1269
1270 static void iwl_set_rate(struct iwl_priv *priv)
1271 {
1272         const struct ieee80211_supported_band *hw = NULL;
1273         struct ieee80211_rate *rate;
1274         int i;
1275
1276         hw = iwl_get_hw_mode(priv, priv->band);
1277         if (!hw) {
1278                 IWL_ERR(priv, "Failed to set rate: unable to get hw mode\n");
1279                 return;
1280         }
1281
1282         priv->active_rate = 0;
1283         priv->active_rate_basic = 0;
1284
1285         for (i = 0; i < hw->n_bitrates; i++) {
1286                 rate = &(hw->bitrates[i]);
1287                 if (rate->hw_value < IWL_RATE_COUNT_LEGACY)
1288                         priv->active_rate |= (1 << rate->hw_value);
1289         }
1290
1291         IWL_DEBUG_RATE(priv, "Set active_rate = %0x, active_rate_basic = %0x\n",
1292                        priv->active_rate, priv->active_rate_basic);
1293
1294         /*
1295          * If a basic rate is configured, then use it (adding IWL_RATE_1M_MASK)
1296          * otherwise set it to the default of all CCK rates and 6, 12, 24 for
1297          * OFDM
1298          */
1299         if (priv->active_rate_basic & IWL_CCK_BASIC_RATES_MASK)
1300                 priv->staging_rxon.cck_basic_rates =
1301                     ((priv->active_rate_basic &
1302                       IWL_CCK_RATES_MASK) >> IWL_FIRST_CCK_RATE) & 0xF;
1303         else
1304                 priv->staging_rxon.cck_basic_rates =
1305                     (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
1306
1307         if (priv->active_rate_basic & IWL_OFDM_BASIC_RATES_MASK)
1308                 priv->staging_rxon.ofdm_basic_rates =
1309                     ((priv->active_rate_basic &
1310                       (IWL_OFDM_BASIC_RATES_MASK | IWL_RATE_6M_MASK)) >>
1311                       IWL_FIRST_OFDM_RATE) & 0xFF;
1312         else
1313                 priv->staging_rxon.ofdm_basic_rates =
1314                    (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
1315 }
1316
1317 void iwl_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
1318 {
1319         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1320         struct iwl_rxon_cmd *rxon = (void *)&priv->active_rxon;
1321         struct iwl_csa_notification *csa = &(pkt->u.csa_notif);
1322
1323         if (priv->switch_rxon.switch_in_progress) {
1324                 if (!le32_to_cpu(csa->status) &&
1325                     (csa->channel == priv->switch_rxon.channel)) {
1326                         rxon->channel = csa->channel;
1327                         priv->staging_rxon.channel = csa->channel;
1328                         IWL_DEBUG_11H(priv, "CSA notif: channel %d\n",
1329                               le16_to_cpu(csa->channel));
1330                 } else
1331                         IWL_ERR(priv, "CSA notif (fail) : channel %d\n",
1332                               le16_to_cpu(csa->channel));
1333
1334                 priv->switch_rxon.switch_in_progress = false;
1335         }
1336 }
1337 EXPORT_SYMBOL(iwl_rx_csa);
1338
1339 #ifdef CONFIG_IWLWIFI_DEBUG
1340 void iwl_print_rx_config_cmd(struct iwl_priv *priv)
1341 {
1342         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
1343
1344         IWL_DEBUG_RADIO(priv, "RX CONFIG:\n");
1345         iwl_print_hex_dump(priv, IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
1346         IWL_DEBUG_RADIO(priv, "u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
1347         IWL_DEBUG_RADIO(priv, "u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
1348         IWL_DEBUG_RADIO(priv, "u32 filter_flags: 0x%08x\n",
1349                         le32_to_cpu(rxon->filter_flags));
1350         IWL_DEBUG_RADIO(priv, "u8 dev_type: 0x%x\n", rxon->dev_type);
1351         IWL_DEBUG_RADIO(priv, "u8 ofdm_basic_rates: 0x%02x\n",
1352                         rxon->ofdm_basic_rates);
1353         IWL_DEBUG_RADIO(priv, "u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
1354         IWL_DEBUG_RADIO(priv, "u8[6] node_addr: %pM\n", rxon->node_addr);
1355         IWL_DEBUG_RADIO(priv, "u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
1356         IWL_DEBUG_RADIO(priv, "u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
1357 }
1358 EXPORT_SYMBOL(iwl_print_rx_config_cmd);
1359 #endif
1360 /**
1361  * iwl_irq_handle_error - called for HW or SW error interrupt from card
1362  */
1363 void iwl_irq_handle_error(struct iwl_priv *priv)
1364 {
1365         /* Set the FW error flag -- cleared on iwl_down */
1366         set_bit(STATUS_FW_ERROR, &priv->status);
1367
1368         /* Cancel currently queued command. */
1369         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
1370
1371         priv->cfg->ops->lib->dump_nic_error_log(priv);
1372         if (priv->cfg->ops->lib->dump_csr)
1373                 priv->cfg->ops->lib->dump_csr(priv);
1374         if (priv->cfg->ops->lib->dump_fh)
1375                 priv->cfg->ops->lib->dump_fh(priv, NULL, false);
1376         priv->cfg->ops->lib->dump_nic_event_log(priv, false, NULL, false);
1377 #ifdef CONFIG_IWLWIFI_DEBUG
1378         if (iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS)
1379                 iwl_print_rx_config_cmd(priv);
1380 #endif
1381
1382         wake_up_interruptible(&priv->wait_command_queue);
1383
1384         /* Keep the restart process from trying to send host
1385          * commands by clearing the INIT status bit */
1386         clear_bit(STATUS_READY, &priv->status);
1387
1388         if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1389                 IWL_DEBUG(priv, IWL_DL_FW_ERRORS,
1390                           "Restarting adapter due to uCode error.\n");
1391
1392                 if (priv->cfg->mod_params->restart_fw)
1393                         queue_work(priv->workqueue, &priv->restart);
1394         }
1395 }
1396 EXPORT_SYMBOL(iwl_irq_handle_error);
1397
1398 int iwl_apm_stop_master(struct iwl_priv *priv)
1399 {
1400         int ret = 0;
1401
1402         /* stop device's busmaster DMA activity */
1403         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
1404
1405         ret = iwl_poll_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_MASTER_DISABLED,
1406                         CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
1407         if (ret)
1408                 IWL_WARN(priv, "Master Disable Timed Out, 100 usec\n");
1409
1410         IWL_DEBUG_INFO(priv, "stop master\n");
1411
1412         return ret;
1413 }
1414 EXPORT_SYMBOL(iwl_apm_stop_master);
1415
1416 void iwl_apm_stop(struct iwl_priv *priv)
1417 {
1418         IWL_DEBUG_INFO(priv, "Stop card, put in low power state\n");
1419
1420         /* Stop device's DMA activity */
1421         iwl_apm_stop_master(priv);
1422
1423         /* Reset the entire device */
1424         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
1425
1426         udelay(10);
1427
1428         /*
1429          * Clear "initialization complete" bit to move adapter from
1430          * D0A* (powered-up Active) --> D0U* (Uninitialized) state.
1431          */
1432         iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1433 }
1434 EXPORT_SYMBOL(iwl_apm_stop);
1435
1436
1437 /*
1438  * Start up NIC's basic functionality after it has been reset
1439  * (e.g. after platform boot, or shutdown via iwl_apm_stop())
1440  * NOTE:  This does not load uCode nor start the embedded processor
1441  */
1442 int iwl_apm_init(struct iwl_priv *priv)
1443 {
1444         int ret = 0;
1445         u16 lctl;
1446
1447         IWL_DEBUG_INFO(priv, "Init card's basic functions\n");
1448
1449         /*
1450          * Use "set_bit" below rather than "write", to preserve any hardware
1451          * bits already set by default after reset.
1452          */
1453
1454         /* Disable L0S exit timer (platform NMI Work/Around) */
1455         iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
1456                           CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
1457
1458         /*
1459          * Disable L0s without affecting L1;
1460          *  don't wait for ICH L0s (ICH bug W/A)
1461          */
1462         iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
1463                           CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
1464
1465         /* Set FH wait threshold to maximum (HW error during stress W/A) */
1466         iwl_set_bit(priv, CSR_DBG_HPET_MEM_REG, CSR_DBG_HPET_MEM_REG_VAL);
1467
1468         /*
1469          * Enable HAP INTA (interrupt from management bus) to
1470          * wake device's PCI Express link L1a -> L0s
1471          * NOTE:  This is no-op for 3945 (non-existant bit)
1472          */
1473         iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1474                                     CSR_HW_IF_CONFIG_REG_BIT_HAP_WAKE_L1A);
1475
1476         /*
1477          * HW bug W/A for instability in PCIe bus L0->L0S->L1 transition.
1478          * Check if BIOS (or OS) enabled L1-ASPM on this device.
1479          * If so (likely), disable L0S, so device moves directly L0->L1;
1480          *    costs negligible amount of power savings.
1481          * If not (unlikely), enable L0S, so there is at least some
1482          *    power savings, even without L1.
1483          */
1484         if (priv->cfg->set_l0s) {
1485                 lctl = iwl_pcie_link_ctl(priv);
1486                 if ((lctl & PCI_CFG_LINK_CTRL_VAL_L1_EN) ==
1487                                         PCI_CFG_LINK_CTRL_VAL_L1_EN) {
1488                         /* L1-ASPM enabled; disable(!) L0S  */
1489                         iwl_set_bit(priv, CSR_GIO_REG,
1490                                         CSR_GIO_REG_VAL_L0S_ENABLED);
1491                         IWL_DEBUG_POWER(priv, "L1 Enabled; Disabling L0S\n");
1492                 } else {
1493                         /* L1-ASPM disabled; enable(!) L0S */
1494                         iwl_clear_bit(priv, CSR_GIO_REG,
1495                                         CSR_GIO_REG_VAL_L0S_ENABLED);
1496                         IWL_DEBUG_POWER(priv, "L1 Disabled; Enabling L0S\n");
1497                 }
1498         }
1499
1500         /* Configure analog phase-lock-loop before activating to D0A */
1501         if (priv->cfg->pll_cfg_val)
1502                 iwl_set_bit(priv, CSR_ANA_PLL_CFG, priv->cfg->pll_cfg_val);
1503
1504         /*
1505          * Set "initialization complete" bit to move adapter from
1506          * D0U* --> D0A* (powered-up active) state.
1507          */
1508         iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1509
1510         /*
1511          * Wait for clock stabilization; once stabilized, access to
1512          * device-internal resources is supported, e.g. iwl_write_prph()
1513          * and accesses to uCode SRAM.
1514          */
1515         ret = iwl_poll_bit(priv, CSR_GP_CNTRL,
1516                         CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
1517                         CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
1518         if (ret < 0) {
1519                 IWL_DEBUG_INFO(priv, "Failed to init the card\n");
1520                 goto out;
1521         }
1522
1523         /*
1524          * Enable DMA and BSM (if used) clocks, wait for them to stabilize.
1525          * BSM (Boostrap State Machine) is only in 3945 and 4965;
1526          * later devices (i.e. 5000 and later) have non-volatile SRAM,
1527          * and don't need BSM to restore data after power-saving sleep.
1528          *
1529          * Write to "CLK_EN_REG"; "1" bits enable clocks, while "0" bits
1530          * do not disable clocks.  This preserves any hardware bits already
1531          * set by default in "CLK_CTRL_REG" after reset.
1532          */
1533         if (priv->cfg->use_bsm)
1534                 iwl_write_prph(priv, APMG_CLK_EN_REG,
1535                         APMG_CLK_VAL_DMA_CLK_RQT | APMG_CLK_VAL_BSM_CLK_RQT);
1536         else
1537                 iwl_write_prph(priv, APMG_CLK_EN_REG,
1538                         APMG_CLK_VAL_DMA_CLK_RQT);
1539         udelay(20);
1540
1541         /* Disable L1-Active */
1542         iwl_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
1543                           APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
1544
1545 out:
1546         return ret;
1547 }
1548 EXPORT_SYMBOL(iwl_apm_init);
1549
1550
1551
1552 void iwl_configure_filter(struct ieee80211_hw *hw,
1553                           unsigned int changed_flags,
1554                           unsigned int *total_flags,
1555                           u64 multicast)
1556 {
1557         struct iwl_priv *priv = hw->priv;
1558         __le32 *filter_flags = &priv->staging_rxon.filter_flags;
1559
1560         IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
1561                         changed_flags, *total_flags);
1562
1563         if (changed_flags & (FIF_OTHER_BSS | FIF_PROMISC_IN_BSS)) {
1564                 if (*total_flags & (FIF_OTHER_BSS | FIF_PROMISC_IN_BSS))
1565                         *filter_flags |= RXON_FILTER_PROMISC_MSK;
1566                 else
1567                         *filter_flags &= ~RXON_FILTER_PROMISC_MSK;
1568         }
1569         if (changed_flags & FIF_ALLMULTI) {
1570                 if (*total_flags & FIF_ALLMULTI)
1571                         *filter_flags |= RXON_FILTER_ACCEPT_GRP_MSK;
1572                 else
1573                         *filter_flags &= ~RXON_FILTER_ACCEPT_GRP_MSK;
1574         }
1575         if (changed_flags & FIF_CONTROL) {
1576                 if (*total_flags & FIF_CONTROL)
1577                         *filter_flags |= RXON_FILTER_CTL2HOST_MSK;
1578                 else
1579                         *filter_flags &= ~RXON_FILTER_CTL2HOST_MSK;
1580         }
1581         if (changed_flags & FIF_BCN_PRBRESP_PROMISC) {
1582                 if (*total_flags & FIF_BCN_PRBRESP_PROMISC)
1583                         *filter_flags |= RXON_FILTER_BCON_AWARE_MSK;
1584                 else
1585                         *filter_flags &= ~RXON_FILTER_BCON_AWARE_MSK;
1586         }
1587
1588         /* We avoid iwl_commit_rxon here to commit the new filter flags
1589          * since mac80211 will call ieee80211_hw_config immediately.
1590          * (mc_list is not supported at this time). Otherwise, we need to
1591          * queue a background iwl_commit_rxon work.
1592          */
1593
1594         *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
1595                         FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
1596 }
1597 EXPORT_SYMBOL(iwl_configure_filter);
1598
1599 int iwl_set_hw_params(struct iwl_priv *priv)
1600 {
1601         priv->hw_params.max_rxq_size = RX_QUEUE_SIZE;
1602         priv->hw_params.max_rxq_log = RX_QUEUE_SIZE_LOG;
1603         if (priv->cfg->mod_params->amsdu_size_8K)
1604                 priv->hw_params.rx_page_order = get_order(IWL_RX_BUF_SIZE_8K);
1605         else
1606                 priv->hw_params.rx_page_order = get_order(IWL_RX_BUF_SIZE_4K);
1607
1608         priv->hw_params.max_beacon_itrvl = IWL_MAX_UCODE_BEACON_INTERVAL;
1609
1610         if (priv->cfg->mod_params->disable_11n)
1611                 priv->cfg->sku &= ~IWL_SKU_N;
1612
1613         /* Device-specific setup */
1614         return priv->cfg->ops->lib->set_hw_params(priv);
1615 }
1616 EXPORT_SYMBOL(iwl_set_hw_params);
1617
1618 int iwl_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force)
1619 {
1620         int ret = 0;
1621         s8 prev_tx_power = priv->tx_power_user_lmt;
1622
1623         if (tx_power < IWL_TX_POWER_TARGET_POWER_MIN) {
1624                 IWL_WARN(priv, "Requested user TXPOWER %d below lower limit %d.\n",
1625                          tx_power,
1626                          IWL_TX_POWER_TARGET_POWER_MIN);
1627                 return -EINVAL;
1628         }
1629
1630         if (tx_power > priv->tx_power_device_lmt) {
1631                 IWL_WARN(priv,
1632                         "Requested user TXPOWER %d above upper limit %d.\n",
1633                          tx_power, priv->tx_power_device_lmt);
1634                 return -EINVAL;
1635         }
1636
1637         if (priv->tx_power_user_lmt != tx_power)
1638                 force = true;
1639
1640         /* if nic is not up don't send command */
1641         if (iwl_is_ready_rf(priv)) {
1642                 priv->tx_power_user_lmt = tx_power;
1643                 if (force && priv->cfg->ops->lib->send_tx_power)
1644                         ret = priv->cfg->ops->lib->send_tx_power(priv);
1645                 else if (!priv->cfg->ops->lib->send_tx_power)
1646                         ret = -EOPNOTSUPP;
1647                 /*
1648                  * if fail to set tx_power, restore the orig. tx power
1649                  */
1650                 if (ret)
1651                         priv->tx_power_user_lmt = prev_tx_power;
1652         }
1653
1654         /*
1655          * Even this is an async host command, the command
1656          * will always report success from uCode
1657          * So once driver can placing the command into the queue
1658          * successfully, driver can use priv->tx_power_user_lmt
1659          * to reflect the current tx power
1660          */
1661         return ret;
1662 }
1663 EXPORT_SYMBOL(iwl_set_tx_power);
1664
1665 irqreturn_t iwl_isr_legacy(int irq, void *data)
1666 {
1667         struct iwl_priv *priv = data;
1668         u32 inta, inta_mask;
1669         u32 inta_fh;
1670         if (!priv)
1671                 return IRQ_NONE;
1672
1673         spin_lock(&priv->lock);
1674
1675         /* Disable (but don't clear!) interrupts here to avoid
1676          *    back-to-back ISRs and sporadic interrupts from our NIC.
1677          * If we have something to service, the tasklet will re-enable ints.
1678          * If we *don't* have something, we'll re-enable before leaving here. */
1679         inta_mask = iwl_read32(priv, CSR_INT_MASK);  /* just for debug */
1680         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
1681
1682         /* Discover which interrupts are active/pending */
1683         inta = iwl_read32(priv, CSR_INT);
1684         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1685
1686         /* Ignore interrupt if there's nothing in NIC to service.
1687          * This may be due to IRQ shared with another device,
1688          * or due to sporadic interrupts thrown from our NIC. */
1689         if (!inta && !inta_fh) {
1690                 IWL_DEBUG_ISR(priv, "Ignore interrupt, inta == 0, inta_fh == 0\n");
1691                 goto none;
1692         }
1693
1694         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
1695                 /* Hardware disappeared. It might have already raised
1696                  * an interrupt */
1697                 IWL_WARN(priv, "HARDWARE GONE?? INTA == 0x%08x\n", inta);
1698                 goto unplugged;
1699         }
1700
1701         IWL_DEBUG_ISR(priv, "ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1702                       inta, inta_mask, inta_fh);
1703
1704         inta &= ~CSR_INT_BIT_SCD;
1705
1706         /* iwl_irq_tasklet() will service interrupts and re-enable them */
1707         if (likely(inta || inta_fh))
1708                 tasklet_schedule(&priv->irq_tasklet);
1709
1710  unplugged:
1711         spin_unlock(&priv->lock);
1712         return IRQ_HANDLED;
1713
1714  none:
1715         /* re-enable interrupts here since we don't have anything to service. */
1716         /* only Re-enable if diabled by irq */
1717         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1718                 iwl_enable_interrupts(priv);
1719         spin_unlock(&priv->lock);
1720         return IRQ_NONE;
1721 }
1722 EXPORT_SYMBOL(iwl_isr_legacy);
1723
1724 int iwl_send_bt_config(struct iwl_priv *priv)
1725 {
1726         struct iwl_bt_cmd bt_cmd = {
1727                 .lead_time = BT_LEAD_TIME_DEF,
1728                 .max_kill = BT_MAX_KILL_DEF,
1729                 .kill_ack_mask = 0,
1730                 .kill_cts_mask = 0,
1731         };
1732
1733         if (!bt_coex_active)
1734                 bt_cmd.flags = BT_COEX_DISABLE;
1735         else
1736                 bt_cmd.flags = BT_COEX_ENABLE;
1737
1738         IWL_DEBUG_INFO(priv, "BT coex %s\n",
1739                 (bt_cmd.flags == BT_COEX_DISABLE) ? "disable" : "active");
1740
1741         return iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG,
1742                                 sizeof(struct iwl_bt_cmd), &bt_cmd);
1743 }
1744 EXPORT_SYMBOL(iwl_send_bt_config);
1745
1746 int iwl_send_statistics_request(struct iwl_priv *priv, u8 flags, bool clear)
1747 {
1748         struct iwl_statistics_cmd statistics_cmd = {
1749                 .configuration_flags =
1750                         clear ? IWL_STATS_CONF_CLEAR_STATS : 0,
1751         };
1752
1753         if (flags & CMD_ASYNC)
1754                 return iwl_send_cmd_pdu_async(priv, REPLY_STATISTICS_CMD,
1755                                                sizeof(struct iwl_statistics_cmd),
1756                                                &statistics_cmd, NULL);
1757         else
1758                 return iwl_send_cmd_pdu(priv, REPLY_STATISTICS_CMD,
1759                                         sizeof(struct iwl_statistics_cmd),
1760                                         &statistics_cmd);
1761 }
1762 EXPORT_SYMBOL(iwl_send_statistics_request);
1763
1764 /**
1765  * iwl_verify_inst_sparse - verify runtime uCode image in card vs. host,
1766  *   using sample data 100 bytes apart.  If these sample points are good,
1767  *   it's a pretty good bet that everything between them is good, too.
1768  */
1769 static int iwlcore_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
1770 {
1771         u32 val;
1772         int ret = 0;
1773         u32 errcnt = 0;
1774         u32 i;
1775
1776         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
1777
1778         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
1779                 /* read data comes through single port, auto-incr addr */
1780                 /* NOTE: Use the debugless read so we don't flood kernel log
1781                  * if IWL_DL_IO is set */
1782                 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
1783                         i + IWL49_RTC_INST_LOWER_BOUND);
1784                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1785                 if (val != le32_to_cpu(*image)) {
1786                         ret = -EIO;
1787                         errcnt++;
1788                         if (errcnt >= 3)
1789                                 break;
1790                 }
1791         }
1792
1793         return ret;
1794 }
1795
1796 /**
1797  * iwlcore_verify_inst_full - verify runtime uCode image in card vs. host,
1798  *     looking at all data.
1799  */
1800 static int iwl_verify_inst_full(struct iwl_priv *priv, __le32 *image,
1801                                  u32 len)
1802 {
1803         u32 val;
1804         u32 save_len = len;
1805         int ret = 0;
1806         u32 errcnt;
1807
1808         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
1809
1810         iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
1811                            IWL49_RTC_INST_LOWER_BOUND);
1812
1813         errcnt = 0;
1814         for (; len > 0; len -= sizeof(u32), image++) {
1815                 /* read data comes through single port, auto-incr addr */
1816                 /* NOTE: Use the debugless read so we don't flood kernel log
1817                  * if IWL_DL_IO is set */
1818                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1819                 if (val != le32_to_cpu(*image)) {
1820                         IWL_ERR(priv, "uCode INST section is invalid at "
1821                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
1822                                   save_len - len, val, le32_to_cpu(*image));
1823                         ret = -EIO;
1824                         errcnt++;
1825                         if (errcnt >= 20)
1826                                 break;
1827                 }
1828         }
1829
1830         if (!errcnt)
1831                 IWL_DEBUG_INFO(priv,
1832                     "ucode image in INSTRUCTION memory is good\n");
1833
1834         return ret;
1835 }
1836
1837 /**
1838  * iwl_verify_ucode - determine which instruction image is in SRAM,
1839  *    and verify its contents
1840  */
1841 int iwl_verify_ucode(struct iwl_priv *priv)
1842 {
1843         __le32 *image;
1844         u32 len;
1845         int ret;
1846
1847         /* Try bootstrap */
1848         image = (__le32 *)priv->ucode_boot.v_addr;
1849         len = priv->ucode_boot.len;
1850         ret = iwlcore_verify_inst_sparse(priv, image, len);
1851         if (!ret) {
1852                 IWL_DEBUG_INFO(priv, "Bootstrap uCode is good in inst SRAM\n");
1853                 return 0;
1854         }
1855
1856         /* Try initialize */
1857         image = (__le32 *)priv->ucode_init.v_addr;
1858         len = priv->ucode_init.len;
1859         ret = iwlcore_verify_inst_sparse(priv, image, len);
1860         if (!ret) {
1861                 IWL_DEBUG_INFO(priv, "Initialize uCode is good in inst SRAM\n");
1862                 return 0;
1863         }
1864
1865         /* Try runtime/protocol */
1866         image = (__le32 *)priv->ucode_code.v_addr;
1867         len = priv->ucode_code.len;
1868         ret = iwlcore_verify_inst_sparse(priv, image, len);
1869         if (!ret) {
1870                 IWL_DEBUG_INFO(priv, "Runtime uCode is good in inst SRAM\n");
1871                 return 0;
1872         }
1873
1874         IWL_ERR(priv, "NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
1875
1876         /* Since nothing seems to match, show first several data entries in
1877          * instruction SRAM, so maybe visual inspection will give a clue.
1878          * Selection of bootstrap image (vs. other images) is arbitrary. */
1879         image = (__le32 *)priv->ucode_boot.v_addr;
1880         len = priv->ucode_boot.len;
1881         ret = iwl_verify_inst_full(priv, image, len);
1882
1883         return ret;
1884 }
1885 EXPORT_SYMBOL(iwl_verify_ucode);
1886
1887
1888 void iwl_rf_kill_ct_config(struct iwl_priv *priv)
1889 {
1890         struct iwl_ct_kill_config cmd;
1891         struct iwl_ct_kill_throttling_config adv_cmd;
1892         unsigned long flags;
1893         int ret = 0;
1894
1895         spin_lock_irqsave(&priv->lock, flags);
1896         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
1897                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
1898         spin_unlock_irqrestore(&priv->lock, flags);
1899         priv->thermal_throttle.ct_kill_toggle = false;
1900
1901         if (priv->cfg->support_ct_kill_exit) {
1902                 adv_cmd.critical_temperature_enter =
1903                         cpu_to_le32(priv->hw_params.ct_kill_threshold);
1904                 adv_cmd.critical_temperature_exit =
1905                         cpu_to_le32(priv->hw_params.ct_kill_exit_threshold);
1906
1907                 ret = iwl_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD,
1908                                        sizeof(adv_cmd), &adv_cmd);
1909                 if (ret)
1910                         IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
1911                 else
1912                         IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
1913                                         "succeeded, "
1914                                         "critical temperature enter is %d,"
1915                                         "exit is %d\n",
1916                                        priv->hw_params.ct_kill_threshold,
1917                                        priv->hw_params.ct_kill_exit_threshold);
1918         } else {
1919                 cmd.critical_temperature_R =
1920                         cpu_to_le32(priv->hw_params.ct_kill_threshold);
1921
1922                 ret = iwl_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD,
1923                                        sizeof(cmd), &cmd);
1924                 if (ret)
1925                         IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
1926                 else
1927                         IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
1928                                         "succeeded, "
1929                                         "critical temperature is %d\n",
1930                                         priv->hw_params.ct_kill_threshold);
1931         }
1932 }
1933 EXPORT_SYMBOL(iwl_rf_kill_ct_config);
1934
1935
1936 /*
1937  * CARD_STATE_CMD
1938  *
1939  * Use: Sets the device's internal card state to enable, disable, or halt
1940  *
1941  * When in the 'enable' state the card operates as normal.
1942  * When in the 'disable' state, the card enters into a low power mode.
1943  * When in the 'halt' state, the card is shut down and must be fully
1944  * restarted to come back on.
1945  */
1946 int iwl_send_card_state(struct iwl_priv *priv, u32 flags, u8 meta_flag)
1947 {
1948         struct iwl_host_cmd cmd = {
1949                 .id = REPLY_CARD_STATE_CMD,
1950                 .len = sizeof(u32),
1951                 .data = &flags,
1952                 .flags = meta_flag,
1953         };
1954
1955         return iwl_send_cmd(priv, &cmd);
1956 }
1957
1958 void iwl_rx_pm_sleep_notif(struct iwl_priv *priv,
1959                            struct iwl_rx_mem_buffer *rxb)
1960 {
1961 #ifdef CONFIG_IWLWIFI_DEBUG
1962         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1963         struct iwl_sleep_notification *sleep = &(pkt->u.sleep_notif);
1964         IWL_DEBUG_RX(priv, "sleep mode: %d, src: %d\n",
1965                      sleep->pm_sleep_mode, sleep->pm_wakeup_src);
1966 #endif
1967 }
1968 EXPORT_SYMBOL(iwl_rx_pm_sleep_notif);
1969
1970 void iwl_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
1971                                       struct iwl_rx_mem_buffer *rxb)
1972 {
1973         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1974         u32 len = le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
1975         IWL_DEBUG_RADIO(priv, "Dumping %d bytes of unhandled "
1976                         "notification for %s:\n", len,
1977                         get_cmd_string(pkt->hdr.cmd));
1978         iwl_print_hex_dump(priv, IWL_DL_RADIO, pkt->u.raw, len);
1979 }
1980 EXPORT_SYMBOL(iwl_rx_pm_debug_statistics_notif);
1981
1982 void iwl_rx_reply_error(struct iwl_priv *priv,
1983                         struct iwl_rx_mem_buffer *rxb)
1984 {
1985         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1986
1987         IWL_ERR(priv, "Error Reply type 0x%08X cmd %s (0x%02X) "
1988                 "seq 0x%04X ser 0x%08X\n",
1989                 le32_to_cpu(pkt->u.err_resp.error_type),
1990                 get_cmd_string(pkt->u.err_resp.cmd_id),
1991                 pkt->u.err_resp.cmd_id,
1992                 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
1993                 le32_to_cpu(pkt->u.err_resp.error_info));
1994 }
1995 EXPORT_SYMBOL(iwl_rx_reply_error);
1996
1997 void iwl_clear_isr_stats(struct iwl_priv *priv)
1998 {
1999         memset(&priv->isr_stats, 0, sizeof(priv->isr_stats));
2000 }
2001
2002 int iwl_mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
2003                            const struct ieee80211_tx_queue_params *params)
2004 {
2005         struct iwl_priv *priv = hw->priv;
2006         unsigned long flags;
2007         int q;
2008
2009         IWL_DEBUG_MAC80211(priv, "enter\n");
2010
2011         if (!iwl_is_ready_rf(priv)) {
2012                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
2013                 return -EIO;
2014         }
2015
2016         if (queue >= AC_NUM) {
2017                 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
2018                 return 0;
2019         }
2020
2021         q = AC_NUM - 1 - queue;
2022
2023         spin_lock_irqsave(&priv->lock, flags);
2024
2025         priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
2026         priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
2027         priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
2028         priv->qos_data.def_qos_parm.ac[q].edca_txop =
2029                         cpu_to_le16((params->txop * 32));
2030
2031         priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
2032         priv->qos_data.qos_active = 1;
2033
2034         if (priv->iw_mode == NL80211_IFTYPE_AP)
2035                 iwl_activate_qos(priv, 1);
2036         else if (priv->assoc_id && iwl_is_associated(priv))
2037                 iwl_activate_qos(priv, 0);
2038
2039         spin_unlock_irqrestore(&priv->lock, flags);
2040
2041         IWL_DEBUG_MAC80211(priv, "leave\n");
2042         return 0;
2043 }
2044 EXPORT_SYMBOL(iwl_mac_conf_tx);
2045
2046 static void iwl_ht_conf(struct iwl_priv *priv,
2047                         struct ieee80211_bss_conf *bss_conf)
2048 {
2049         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
2050         struct ieee80211_sta *sta;
2051
2052         IWL_DEBUG_MAC80211(priv, "enter: \n");
2053
2054         if (!ht_conf->is_ht)
2055                 return;
2056
2057         ht_conf->ht_protection =
2058                 bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_PROTECTION;
2059         ht_conf->non_GF_STA_present =
2060                 !!(bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
2061
2062         ht_conf->single_chain_sufficient = false;
2063
2064         switch (priv->iw_mode) {
2065         case NL80211_IFTYPE_STATION:
2066                 rcu_read_lock();
2067                 sta = ieee80211_find_sta(priv->vif, priv->bssid);
2068                 if (sta) {
2069                         struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
2070                         int maxstreams;
2071
2072                         maxstreams = (ht_cap->mcs.tx_params &
2073                                       IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK)
2074                                         >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
2075                         maxstreams += 1;
2076
2077                         if ((ht_cap->mcs.rx_mask[1] == 0) &&
2078                             (ht_cap->mcs.rx_mask[2] == 0))
2079                                 ht_conf->single_chain_sufficient = true;
2080                         if (maxstreams <= 1)
2081                                 ht_conf->single_chain_sufficient = true;
2082                 } else {
2083                         /*
2084                          * If at all, this can only happen through a race
2085                          * when the AP disconnects us while we're still
2086                          * setting up the connection, in that case mac80211
2087                          * will soon tell us about that.
2088                          */
2089                         ht_conf->single_chain_sufficient = true;
2090                 }
2091                 rcu_read_unlock();
2092                 break;
2093         case NL80211_IFTYPE_ADHOC:
2094                 ht_conf->single_chain_sufficient = true;
2095                 break;
2096         default:
2097                 break;
2098         }
2099
2100         IWL_DEBUG_MAC80211(priv, "leave\n");
2101 }
2102
2103 static inline void iwl_set_no_assoc(struct iwl_priv *priv)
2104 {
2105         priv->assoc_id = 0;
2106         iwl_led_disassociate(priv);
2107         /*
2108          * inform the ucode that there is no longer an
2109          * association and that no more packets should be
2110          * sent
2111          */
2112         priv->staging_rxon.filter_flags &=
2113                 ~RXON_FILTER_ASSOC_MSK;
2114         priv->staging_rxon.assoc_id = 0;
2115         iwlcore_commit_rxon(priv);
2116 }
2117
2118 #define IWL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6)
2119 void iwl_bss_info_changed(struct ieee80211_hw *hw,
2120                           struct ieee80211_vif *vif,
2121                           struct ieee80211_bss_conf *bss_conf,
2122                           u32 changes)
2123 {
2124         struct iwl_priv *priv = hw->priv;
2125         int ret;
2126
2127         IWL_DEBUG_MAC80211(priv, "changes = 0x%X\n", changes);
2128
2129         if (!iwl_is_alive(priv))
2130                 return;
2131
2132         mutex_lock(&priv->mutex);
2133
2134         if (changes & BSS_CHANGED_BEACON &&
2135             priv->iw_mode == NL80211_IFTYPE_AP) {
2136                 dev_kfree_skb(priv->ibss_beacon);
2137                 priv->ibss_beacon = ieee80211_beacon_get(hw, vif);
2138         }
2139
2140         if (changes & BSS_CHANGED_BEACON_INT) {
2141                 priv->beacon_int = bss_conf->beacon_int;
2142                 /* TODO: in AP mode, do something to make this take effect */
2143         }
2144
2145         if (changes & BSS_CHANGED_BSSID) {
2146                 IWL_DEBUG_MAC80211(priv, "BSSID %pM\n", bss_conf->bssid);
2147
2148                 /*
2149                  * If there is currently a HW scan going on in the
2150                  * background then we need to cancel it else the RXON
2151                  * below/in post_associate will fail.
2152                  */
2153                 if (iwl_scan_cancel_timeout(priv, 100)) {
2154                         IWL_WARN(priv, "Aborted scan still in progress after 100ms\n");
2155                         IWL_DEBUG_MAC80211(priv, "leaving - scan abort failed.\n");
2156                         mutex_unlock(&priv->mutex);
2157                         return;
2158                 }
2159
2160                 /* mac80211 only sets assoc when in STATION mode */
2161                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC ||
2162                     bss_conf->assoc) {
2163                         memcpy(priv->staging_rxon.bssid_addr,
2164                                bss_conf->bssid, ETH_ALEN);
2165
2166                         /* currently needed in a few places */
2167                         memcpy(priv->bssid, bss_conf->bssid, ETH_ALEN);
2168                 } else {
2169                         priv->staging_rxon.filter_flags &=
2170                                 ~RXON_FILTER_ASSOC_MSK;
2171                 }
2172
2173         }
2174
2175         /*
2176          * This needs to be after setting the BSSID in case
2177          * mac80211 decides to do both changes at once because
2178          * it will invoke post_associate.
2179          */
2180         if (priv->iw_mode == NL80211_IFTYPE_ADHOC &&
2181             changes & BSS_CHANGED_BEACON) {
2182                 struct sk_buff *beacon = ieee80211_beacon_get(hw, vif);
2183
2184                 if (beacon)
2185                         iwl_mac_beacon_update(hw, beacon);
2186         }
2187
2188         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
2189                 IWL_DEBUG_MAC80211(priv, "ERP_PREAMBLE %d\n",
2190                                    bss_conf->use_short_preamble);
2191                 if (bss_conf->use_short_preamble)
2192                         priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2193                 else
2194                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2195         }
2196
2197         if (changes & BSS_CHANGED_ERP_CTS_PROT) {
2198                 IWL_DEBUG_MAC80211(priv, "ERP_CTS %d\n", bss_conf->use_cts_prot);
2199                 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
2200                         priv->staging_rxon.flags |= RXON_FLG_TGG_PROTECT_MSK;
2201                 else
2202                         priv->staging_rxon.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
2203         }
2204
2205         if (changes & BSS_CHANGED_BASIC_RATES) {
2206                 /* XXX use this information
2207                  *
2208                  * To do that, remove code from iwl_set_rate() and put something
2209                  * like this here:
2210                  *
2211                 if (A-band)
2212                         priv->staging_rxon.ofdm_basic_rates =
2213                                 bss_conf->basic_rates;
2214                 else
2215                         priv->staging_rxon.ofdm_basic_rates =
2216                                 bss_conf->basic_rates >> 4;
2217                         priv->staging_rxon.cck_basic_rates =
2218                                 bss_conf->basic_rates & 0xF;
2219                  */
2220         }
2221
2222         if (changes & BSS_CHANGED_HT) {
2223                 iwl_ht_conf(priv, bss_conf);
2224
2225                 if (priv->cfg->ops->hcmd->set_rxon_chain)
2226                         priv->cfg->ops->hcmd->set_rxon_chain(priv);
2227         }
2228
2229         if (changes & BSS_CHANGED_ASSOC) {
2230                 IWL_DEBUG_MAC80211(priv, "ASSOC %d\n", bss_conf->assoc);
2231                 if (bss_conf->assoc) {
2232                         priv->assoc_id = bss_conf->aid;
2233                         priv->beacon_int = bss_conf->beacon_int;
2234                         priv->timestamp = bss_conf->timestamp;
2235                         priv->assoc_capability = bss_conf->assoc_capability;
2236
2237                         iwl_led_associate(priv);
2238
2239                         /*
2240                          * We have just associated, don't start scan too early
2241                          * leave time for EAPOL exchange to complete.
2242                          *
2243                          * XXX: do this in mac80211
2244                          */
2245                         priv->next_scan_jiffies = jiffies +
2246                                         IWL_DELAY_NEXT_SCAN_AFTER_ASSOC;
2247                         if (!iwl_is_rfkill(priv))
2248                                 priv->cfg->ops->lib->post_associate(priv);
2249                 } else
2250                         iwl_set_no_assoc(priv);
2251         }
2252
2253         if (changes && iwl_is_associated(priv) && priv->assoc_id) {
2254                 IWL_DEBUG_MAC80211(priv, "Changes (%#x) while associated\n",
2255                                    changes);
2256                 ret = iwl_send_rxon_assoc(priv);
2257                 if (!ret) {
2258                         /* Sync active_rxon with latest change. */
2259                         memcpy((void *)&priv->active_rxon,
2260                                 &priv->staging_rxon,
2261                                 sizeof(struct iwl_rxon_cmd));
2262                 }
2263         }
2264
2265         if (changes & BSS_CHANGED_BEACON_ENABLED) {
2266                 if (vif->bss_conf.enable_beacon) {
2267                         memcpy(priv->staging_rxon.bssid_addr,
2268                                bss_conf->bssid, ETH_ALEN);
2269                         memcpy(priv->bssid, bss_conf->bssid, ETH_ALEN);
2270                         iwlcore_config_ap(priv);
2271                 } else
2272                         iwl_set_no_assoc(priv);
2273         }
2274
2275         mutex_unlock(&priv->mutex);
2276
2277         IWL_DEBUG_MAC80211(priv, "leave\n");
2278 }
2279 EXPORT_SYMBOL(iwl_bss_info_changed);
2280
2281 int iwl_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb)
2282 {
2283         struct iwl_priv *priv = hw->priv;
2284         unsigned long flags;
2285         __le64 timestamp;
2286
2287         IWL_DEBUG_MAC80211(priv, "enter\n");
2288
2289         if (!iwl_is_ready_rf(priv)) {
2290                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
2291                 return -EIO;
2292         }
2293
2294         if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
2295                 IWL_DEBUG_MAC80211(priv, "leave - not IBSS\n");
2296                 return -EIO;
2297         }
2298
2299         spin_lock_irqsave(&priv->lock, flags);
2300
2301         if (priv->ibss_beacon)
2302                 dev_kfree_skb(priv->ibss_beacon);
2303
2304         priv->ibss_beacon = skb;
2305
2306         priv->assoc_id = 0;
2307         timestamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
2308         priv->timestamp = le64_to_cpu(timestamp);
2309
2310         IWL_DEBUG_MAC80211(priv, "leave\n");
2311         spin_unlock_irqrestore(&priv->lock, flags);
2312
2313         iwl_reset_qos(priv);
2314
2315         priv->cfg->ops->lib->post_associate(priv);
2316
2317
2318         return 0;
2319 }
2320 EXPORT_SYMBOL(iwl_mac_beacon_update);
2321
2322 int iwl_set_mode(struct iwl_priv *priv, int mode)
2323 {
2324         if (mode == NL80211_IFTYPE_ADHOC) {
2325                 const struct iwl_channel_info *ch_info;
2326
2327                 ch_info = iwl_get_channel_info(priv,
2328                         priv->band,
2329                         le16_to_cpu(priv->staging_rxon.channel));
2330
2331                 if (!ch_info || !is_channel_ibss(ch_info)) {
2332                         IWL_ERR(priv, "channel %d not IBSS channel\n",
2333                                   le16_to_cpu(priv->staging_rxon.channel));
2334                         return -EINVAL;
2335                 }
2336         }
2337
2338         iwl_connection_init_rx_config(priv, mode);
2339
2340         if (priv->cfg->ops->hcmd->set_rxon_chain)
2341                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
2342
2343         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2344
2345         iwl_clear_stations_table(priv);
2346
2347         /* dont commit rxon if rf-kill is on*/
2348         if (!iwl_is_ready_rf(priv))
2349                 return -EAGAIN;
2350
2351         iwlcore_commit_rxon(priv);
2352
2353         return 0;
2354 }
2355 EXPORT_SYMBOL(iwl_set_mode);
2356
2357 int iwl_mac_add_interface(struct ieee80211_hw *hw,
2358                                  struct ieee80211_vif *vif)
2359 {
2360         struct iwl_priv *priv = hw->priv;
2361         int err = 0;
2362
2363         IWL_DEBUG_MAC80211(priv, "enter: type %d\n", vif->type);
2364
2365         mutex_lock(&priv->mutex);
2366
2367         if (priv->vif) {
2368                 IWL_DEBUG_MAC80211(priv, "leave - vif != NULL\n");
2369                 err = -EOPNOTSUPP;
2370                 goto out;
2371         }
2372
2373         priv->vif = vif;
2374         priv->iw_mode = vif->type;
2375
2376         if (vif->addr) {
2377                 IWL_DEBUG_MAC80211(priv, "Set %pM\n", vif->addr);
2378                 memcpy(priv->mac_addr, vif->addr, ETH_ALEN);
2379         }
2380
2381         if (iwl_set_mode(priv, vif->type) == -EAGAIN)
2382                 /* we are not ready, will run again when ready */
2383                 set_bit(STATUS_MODE_PENDING, &priv->status);
2384
2385  out:
2386         mutex_unlock(&priv->mutex);
2387
2388         IWL_DEBUG_MAC80211(priv, "leave\n");
2389         return err;
2390 }
2391 EXPORT_SYMBOL(iwl_mac_add_interface);
2392
2393 void iwl_mac_remove_interface(struct ieee80211_hw *hw,
2394                                      struct ieee80211_vif *vif)
2395 {
2396         struct iwl_priv *priv = hw->priv;
2397
2398         IWL_DEBUG_MAC80211(priv, "enter\n");
2399
2400         mutex_lock(&priv->mutex);
2401
2402         if (iwl_is_ready_rf(priv)) {
2403                 iwl_scan_cancel_timeout(priv, 100);
2404                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2405                 iwlcore_commit_rxon(priv);
2406         }
2407         if (priv->vif == vif) {
2408                 priv->vif = NULL;
2409                 memset(priv->bssid, 0, ETH_ALEN);
2410         }
2411         mutex_unlock(&priv->mutex);
2412
2413         IWL_DEBUG_MAC80211(priv, "leave\n");
2414
2415 }
2416 EXPORT_SYMBOL(iwl_mac_remove_interface);
2417
2418 /**
2419  * iwl_mac_config - mac80211 config callback
2420  *
2421  * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
2422  * be set inappropriately and the driver currently sets the hardware up to
2423  * use it whenever needed.
2424  */
2425 int iwl_mac_config(struct ieee80211_hw *hw, u32 changed)
2426 {
2427         struct iwl_priv *priv = hw->priv;
2428         const struct iwl_channel_info *ch_info;
2429         struct ieee80211_conf *conf = &hw->conf;
2430         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
2431         unsigned long flags = 0;
2432         int ret = 0;
2433         u16 ch;
2434         int scan_active = 0;
2435
2436         mutex_lock(&priv->mutex);
2437
2438         IWL_DEBUG_MAC80211(priv, "enter to channel %d changed 0x%X\n",
2439                                         conf->channel->hw_value, changed);
2440
2441         if (unlikely(!priv->cfg->mod_params->disable_hw_scan &&
2442                         test_bit(STATUS_SCANNING, &priv->status))) {
2443                 scan_active = 1;
2444                 IWL_DEBUG_MAC80211(priv, "leave - scanning\n");
2445         }
2446
2447         if (changed & (IEEE80211_CONF_CHANGE_SMPS |
2448                        IEEE80211_CONF_CHANGE_CHANNEL)) {
2449                 /* mac80211 uses static for non-HT which is what we want */
2450                 priv->current_ht_config.smps = conf->smps_mode;
2451
2452                 /*
2453                  * Recalculate chain counts.
2454                  *
2455                  * If monitor mode is enabled then mac80211 will
2456                  * set up the SM PS mode to OFF if an HT channel is
2457                  * configured.
2458                  */
2459                 if (priv->cfg->ops->hcmd->set_rxon_chain)
2460                         priv->cfg->ops->hcmd->set_rxon_chain(priv);
2461         }
2462
2463         /* during scanning mac80211 will delay channel setting until
2464          * scan finish with changed = 0
2465          */
2466         if (!changed || (changed & IEEE80211_CONF_CHANGE_CHANNEL)) {
2467                 if (scan_active)
2468                         goto set_ch_out;
2469
2470                 ch = ieee80211_frequency_to_channel(conf->channel->center_freq);
2471                 ch_info = iwl_get_channel_info(priv, conf->channel->band, ch);
2472                 if (!is_channel_valid(ch_info)) {
2473                         IWL_DEBUG_MAC80211(priv, "leave - invalid channel\n");
2474                         ret = -EINVAL;
2475                         goto set_ch_out;
2476                 }
2477
2478                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC &&
2479                         !is_channel_ibss(ch_info)) {
2480                         IWL_ERR(priv, "channel %d in band %d not "
2481                                 "IBSS channel\n",
2482                                 conf->channel->hw_value, conf->channel->band);
2483                         ret = -EINVAL;
2484                         goto set_ch_out;
2485                 }
2486
2487                 spin_lock_irqsave(&priv->lock, flags);
2488
2489                 /* Configure HT40 channels */
2490                 ht_conf->is_ht = conf_is_ht(conf);
2491                 if (ht_conf->is_ht) {
2492                         if (conf_is_ht40_minus(conf)) {
2493                                 ht_conf->extension_chan_offset =
2494                                         IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2495                                 ht_conf->is_40mhz = true;
2496                         } else if (conf_is_ht40_plus(conf)) {
2497                                 ht_conf->extension_chan_offset =
2498                                         IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2499                                 ht_conf->is_40mhz = true;
2500                         } else {
2501                                 ht_conf->extension_chan_offset =
2502                                         IEEE80211_HT_PARAM_CHA_SEC_NONE;
2503                                 ht_conf->is_40mhz = false;
2504                         }
2505                 } else
2506                         ht_conf->is_40mhz = false;
2507                 /* Default to no protection. Protection mode will later be set
2508                  * from BSS config in iwl_ht_conf */
2509                 ht_conf->ht_protection = IEEE80211_HT_OP_MODE_PROTECTION_NONE;
2510
2511                 /* if we are switching from ht to 2.4 clear flags
2512                  * from any ht related info since 2.4 does not
2513                  * support ht */
2514                 if ((le16_to_cpu(priv->staging_rxon.channel) != ch))
2515                         priv->staging_rxon.flags = 0;
2516
2517                 iwl_set_rxon_channel(priv, conf->channel);
2518                 iwl_set_rxon_ht(priv, ht_conf);
2519
2520                 iwl_set_flags_for_band(priv, conf->channel->band);
2521                 spin_unlock_irqrestore(&priv->lock, flags);
2522                 if (iwl_is_associated(priv) &&
2523                     (le16_to_cpu(priv->active_rxon.channel) != ch) &&
2524                     priv->cfg->ops->lib->set_channel_switch) {
2525                         iwl_set_rate(priv);
2526                         /*
2527                          * at this point, staging_rxon has the
2528                          * configuration for channel switch
2529                          */
2530                         ret = priv->cfg->ops->lib->set_channel_switch(priv,
2531                                 ch);
2532                         if (!ret) {
2533                                 iwl_print_rx_config_cmd(priv);
2534                                 goto out;
2535                         }
2536                         priv->switch_rxon.switch_in_progress = false;
2537                 }
2538  set_ch_out:
2539                 /* The list of supported rates and rate mask can be different
2540                  * for each band; since the band may have changed, reset
2541                  * the rate mask to what mac80211 lists */
2542                 iwl_set_rate(priv);
2543         }
2544
2545         if (changed & (IEEE80211_CONF_CHANGE_PS |
2546                         IEEE80211_CONF_CHANGE_IDLE)) {
2547                 ret = iwl_power_update_mode(priv, false);
2548                 if (ret)
2549                         IWL_DEBUG_MAC80211(priv, "Error setting sleep level\n");
2550         }
2551
2552         if (changed & IEEE80211_CONF_CHANGE_POWER) {
2553                 IWL_DEBUG_MAC80211(priv, "TX Power old=%d new=%d\n",
2554                         priv->tx_power_user_lmt, conf->power_level);
2555
2556                 iwl_set_tx_power(priv, conf->power_level, false);
2557         }
2558
2559         if (!iwl_is_ready(priv)) {
2560                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2561                 goto out;
2562         }
2563
2564         if (scan_active)
2565                 goto out;
2566
2567         if (memcmp(&priv->active_rxon,
2568                    &priv->staging_rxon, sizeof(priv->staging_rxon)))
2569                 iwlcore_commit_rxon(priv);
2570         else
2571                 IWL_DEBUG_INFO(priv, "Not re-sending same RXON configuration.\n");
2572
2573
2574 out:
2575         IWL_DEBUG_MAC80211(priv, "leave\n");
2576         mutex_unlock(&priv->mutex);
2577         return ret;
2578 }
2579 EXPORT_SYMBOL(iwl_mac_config);
2580
2581 void iwl_mac_reset_tsf(struct ieee80211_hw *hw)
2582 {
2583         struct iwl_priv *priv = hw->priv;
2584         unsigned long flags;
2585
2586         mutex_lock(&priv->mutex);
2587         IWL_DEBUG_MAC80211(priv, "enter\n");
2588
2589         spin_lock_irqsave(&priv->lock, flags);
2590         memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_config));
2591         spin_unlock_irqrestore(&priv->lock, flags);
2592
2593         iwl_reset_qos(priv);
2594
2595         spin_lock_irqsave(&priv->lock, flags);
2596         priv->assoc_id = 0;
2597         priv->assoc_capability = 0;
2598         priv->assoc_station_added = 0;
2599
2600         /* new association get rid of ibss beacon skb */
2601         if (priv->ibss_beacon)
2602                 dev_kfree_skb(priv->ibss_beacon);
2603
2604         priv->ibss_beacon = NULL;
2605
2606         priv->beacon_int = priv->vif->bss_conf.beacon_int;
2607         priv->timestamp = 0;
2608         if ((priv->iw_mode == NL80211_IFTYPE_STATION))
2609                 priv->beacon_int = 0;
2610
2611         spin_unlock_irqrestore(&priv->lock, flags);
2612
2613         if (!iwl_is_ready_rf(priv)) {
2614                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2615                 mutex_unlock(&priv->mutex);
2616                 return;
2617         }
2618
2619         /* we are restarting association process
2620          * clear RXON_FILTER_ASSOC_MSK bit
2621          */
2622         if (priv->iw_mode != NL80211_IFTYPE_AP) {
2623                 iwl_scan_cancel_timeout(priv, 100);
2624                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2625                 iwlcore_commit_rxon(priv);
2626         }
2627
2628         if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
2629                 IWL_DEBUG_MAC80211(priv, "leave - not in IBSS\n");
2630                 mutex_unlock(&priv->mutex);
2631                 return;
2632         }
2633
2634         iwl_set_rate(priv);
2635
2636         mutex_unlock(&priv->mutex);
2637
2638         IWL_DEBUG_MAC80211(priv, "leave\n");
2639 }
2640 EXPORT_SYMBOL(iwl_mac_reset_tsf);
2641
2642 int iwl_alloc_txq_mem(struct iwl_priv *priv)
2643 {
2644         if (!priv->txq)
2645                 priv->txq = kzalloc(
2646                         sizeof(struct iwl_tx_queue) * priv->cfg->num_of_queues,
2647                         GFP_KERNEL);
2648         if (!priv->txq) {
2649                 IWL_ERR(priv, "Not enough memory for txq \n");
2650                 return -ENOMEM;
2651         }
2652         return 0;
2653 }
2654 EXPORT_SYMBOL(iwl_alloc_txq_mem);
2655
2656 void iwl_free_txq_mem(struct iwl_priv *priv)
2657 {
2658         kfree(priv->txq);
2659         priv->txq = NULL;
2660 }
2661 EXPORT_SYMBOL(iwl_free_txq_mem);
2662
2663 int iwl_send_wimax_coex(struct iwl_priv *priv)
2664 {
2665         struct iwl_wimax_coex_cmd uninitialized_var(coex_cmd);
2666
2667         if (priv->cfg->support_wimax_coexist) {
2668                 /* UnMask wake up src at associated sleep */
2669                 coex_cmd.flags |= COEX_FLAGS_ASSOC_WA_UNMASK_MSK;
2670
2671                 /* UnMask wake up src at unassociated sleep */
2672                 coex_cmd.flags |= COEX_FLAGS_UNASSOC_WA_UNMASK_MSK;
2673                 memcpy(coex_cmd.sta_prio, cu_priorities,
2674                         sizeof(struct iwl_wimax_coex_event_entry) *
2675                          COEX_NUM_OF_EVENTS);
2676
2677                 /* enabling the coexistence feature */
2678                 coex_cmd.flags |= COEX_FLAGS_COEX_ENABLE_MSK;
2679
2680                 /* enabling the priorities tables */
2681                 coex_cmd.flags |= COEX_FLAGS_STA_TABLE_VALID_MSK;
2682         } else {
2683                 /* coexistence is disabled */
2684                 memset(&coex_cmd, 0, sizeof(coex_cmd));
2685         }
2686         return iwl_send_cmd_pdu(priv, COEX_PRIORITY_TABLE_CMD,
2687                                 sizeof(coex_cmd), &coex_cmd);
2688 }
2689 EXPORT_SYMBOL(iwl_send_wimax_coex);
2690
2691 #ifdef CONFIG_IWLWIFI_DEBUGFS
2692
2693 #define IWL_TRAFFIC_DUMP_SIZE   (IWL_TRAFFIC_ENTRY_SIZE * IWL_TRAFFIC_ENTRIES)
2694
2695 void iwl_reset_traffic_log(struct iwl_priv *priv)
2696 {
2697         priv->tx_traffic_idx = 0;
2698         priv->rx_traffic_idx = 0;
2699         if (priv->tx_traffic)
2700                 memset(priv->tx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
2701         if (priv->rx_traffic)
2702                 memset(priv->rx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
2703 }
2704
2705 int iwl_alloc_traffic_mem(struct iwl_priv *priv)
2706 {
2707         u32 traffic_size = IWL_TRAFFIC_DUMP_SIZE;
2708
2709         if (iwl_debug_level & IWL_DL_TX) {
2710                 if (!priv->tx_traffic) {
2711                         priv->tx_traffic =
2712                                 kzalloc(traffic_size, GFP_KERNEL);
2713                         if (!priv->tx_traffic)
2714                                 return -ENOMEM;
2715                 }
2716         }
2717         if (iwl_debug_level & IWL_DL_RX) {
2718                 if (!priv->rx_traffic) {
2719                         priv->rx_traffic =
2720                                 kzalloc(traffic_size, GFP_KERNEL);
2721                         if (!priv->rx_traffic)
2722                                 return -ENOMEM;
2723                 }
2724         }
2725         iwl_reset_traffic_log(priv);
2726         return 0;
2727 }
2728 EXPORT_SYMBOL(iwl_alloc_traffic_mem);
2729
2730 void iwl_free_traffic_mem(struct iwl_priv *priv)
2731 {
2732         kfree(priv->tx_traffic);
2733         priv->tx_traffic = NULL;
2734
2735         kfree(priv->rx_traffic);
2736         priv->rx_traffic = NULL;
2737 }
2738 EXPORT_SYMBOL(iwl_free_traffic_mem);
2739
2740 void iwl_dbg_log_tx_data_frame(struct iwl_priv *priv,
2741                       u16 length, struct ieee80211_hdr *header)
2742 {
2743         __le16 fc;
2744         u16 len;
2745
2746         if (likely(!(iwl_debug_level & IWL_DL_TX)))
2747                 return;
2748
2749         if (!priv->tx_traffic)
2750                 return;
2751
2752         fc = header->frame_control;
2753         if (ieee80211_is_data(fc)) {
2754                 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
2755                        ? IWL_TRAFFIC_ENTRY_SIZE : length;
2756                 memcpy((priv->tx_traffic +
2757                        (priv->tx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
2758                        header, len);
2759                 priv->tx_traffic_idx =
2760                         (priv->tx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
2761         }
2762 }
2763 EXPORT_SYMBOL(iwl_dbg_log_tx_data_frame);
2764
2765 void iwl_dbg_log_rx_data_frame(struct iwl_priv *priv,
2766                       u16 length, struct ieee80211_hdr *header)
2767 {
2768         __le16 fc;
2769         u16 len;
2770
2771         if (likely(!(iwl_debug_level & IWL_DL_RX)))
2772                 return;
2773
2774         if (!priv->rx_traffic)
2775                 return;
2776
2777         fc = header->frame_control;
2778         if (ieee80211_is_data(fc)) {
2779                 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
2780                        ? IWL_TRAFFIC_ENTRY_SIZE : length;
2781                 memcpy((priv->rx_traffic +
2782                        (priv->rx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
2783                        header, len);
2784                 priv->rx_traffic_idx =
2785                         (priv->rx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
2786         }
2787 }
2788 EXPORT_SYMBOL(iwl_dbg_log_rx_data_frame);
2789
2790 const char *get_mgmt_string(int cmd)
2791 {
2792         switch (cmd) {
2793                 IWL_CMD(MANAGEMENT_ASSOC_REQ);
2794                 IWL_CMD(MANAGEMENT_ASSOC_RESP);
2795                 IWL_CMD(MANAGEMENT_REASSOC_REQ);
2796                 IWL_CMD(MANAGEMENT_REASSOC_RESP);
2797                 IWL_CMD(MANAGEMENT_PROBE_REQ);
2798                 IWL_CMD(MANAGEMENT_PROBE_RESP);
2799                 IWL_CMD(MANAGEMENT_BEACON);
2800                 IWL_CMD(MANAGEMENT_ATIM);
2801                 IWL_CMD(MANAGEMENT_DISASSOC);
2802                 IWL_CMD(MANAGEMENT_AUTH);
2803                 IWL_CMD(MANAGEMENT_DEAUTH);
2804                 IWL_CMD(MANAGEMENT_ACTION);
2805         default:
2806                 return "UNKNOWN";
2807
2808         }
2809 }
2810
2811 const char *get_ctrl_string(int cmd)
2812 {
2813         switch (cmd) {
2814                 IWL_CMD(CONTROL_BACK_REQ);
2815                 IWL_CMD(CONTROL_BACK);
2816                 IWL_CMD(CONTROL_PSPOLL);
2817                 IWL_CMD(CONTROL_RTS);
2818                 IWL_CMD(CONTROL_CTS);
2819                 IWL_CMD(CONTROL_ACK);
2820                 IWL_CMD(CONTROL_CFEND);
2821                 IWL_CMD(CONTROL_CFENDACK);
2822         default:
2823                 return "UNKNOWN";
2824
2825         }
2826 }
2827
2828 void iwl_clear_traffic_stats(struct iwl_priv *priv)
2829 {
2830         memset(&priv->tx_stats, 0, sizeof(struct traffic_stats));
2831         memset(&priv->rx_stats, 0, sizeof(struct traffic_stats));
2832         priv->led_tpt = 0;
2833 }
2834
2835 /*
2836  * if CONFIG_IWLWIFI_DEBUGFS defined, iwl_update_stats function will
2837  * record all the MGMT, CTRL and DATA pkt for both TX and Rx pass.
2838  * Use debugFs to display the rx/rx_statistics
2839  * if CONFIG_IWLWIFI_DEBUGFS not being defined, then no MGMT and CTRL
2840  * information will be recorded, but DATA pkt still will be recorded
2841  * for the reason of iwl_led.c need to control the led blinking based on
2842  * number of tx and rx data.
2843  *
2844  */
2845 void iwl_update_stats(struct iwl_priv *priv, bool is_tx, __le16 fc, u16 len)
2846 {
2847         struct traffic_stats    *stats;
2848
2849         if (is_tx)
2850                 stats = &priv->tx_stats;
2851         else
2852                 stats = &priv->rx_stats;
2853
2854         if (ieee80211_is_mgmt(fc)) {
2855                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
2856                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
2857                         stats->mgmt[MANAGEMENT_ASSOC_REQ]++;
2858                         break;
2859                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP):
2860                         stats->mgmt[MANAGEMENT_ASSOC_RESP]++;
2861                         break;
2862                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
2863                         stats->mgmt[MANAGEMENT_REASSOC_REQ]++;
2864                         break;
2865                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP):
2866                         stats->mgmt[MANAGEMENT_REASSOC_RESP]++;
2867                         break;
2868                 case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ):
2869                         stats->mgmt[MANAGEMENT_PROBE_REQ]++;
2870                         break;
2871                 case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP):
2872                         stats->mgmt[MANAGEMENT_PROBE_RESP]++;
2873                         break;
2874                 case cpu_to_le16(IEEE80211_STYPE_BEACON):
2875                         stats->mgmt[MANAGEMENT_BEACON]++;
2876                         break;
2877                 case cpu_to_le16(IEEE80211_STYPE_ATIM):
2878                         stats->mgmt[MANAGEMENT_ATIM]++;
2879                         break;
2880                 case cpu_to_le16(IEEE80211_STYPE_DISASSOC):
2881                         stats->mgmt[MANAGEMENT_DISASSOC]++;
2882                         break;
2883                 case cpu_to_le16(IEEE80211_STYPE_AUTH):
2884                         stats->mgmt[MANAGEMENT_AUTH]++;
2885                         break;
2886                 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
2887                         stats->mgmt[MANAGEMENT_DEAUTH]++;
2888                         break;
2889                 case cpu_to_le16(IEEE80211_STYPE_ACTION):
2890                         stats->mgmt[MANAGEMENT_ACTION]++;
2891                         break;
2892                 }
2893         } else if (ieee80211_is_ctl(fc)) {
2894                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
2895                 case cpu_to_le16(IEEE80211_STYPE_BACK_REQ):
2896                         stats->ctrl[CONTROL_BACK_REQ]++;
2897                         break;
2898                 case cpu_to_le16(IEEE80211_STYPE_BACK):
2899                         stats->ctrl[CONTROL_BACK]++;
2900                         break;
2901                 case cpu_to_le16(IEEE80211_STYPE_PSPOLL):
2902                         stats->ctrl[CONTROL_PSPOLL]++;
2903                         break;
2904                 case cpu_to_le16(IEEE80211_STYPE_RTS):
2905                         stats->ctrl[CONTROL_RTS]++;
2906                         break;
2907                 case cpu_to_le16(IEEE80211_STYPE_CTS):
2908                         stats->ctrl[CONTROL_CTS]++;
2909                         break;
2910                 case cpu_to_le16(IEEE80211_STYPE_ACK):
2911                         stats->ctrl[CONTROL_ACK]++;
2912                         break;
2913                 case cpu_to_le16(IEEE80211_STYPE_CFEND):
2914                         stats->ctrl[CONTROL_CFEND]++;
2915                         break;
2916                 case cpu_to_le16(IEEE80211_STYPE_CFENDACK):
2917                         stats->ctrl[CONTROL_CFENDACK]++;
2918                         break;
2919                 }
2920         } else {
2921                 /* data */
2922                 stats->data_cnt++;
2923                 stats->data_bytes += len;
2924         }
2925         iwl_leds_background(priv);
2926 }
2927 EXPORT_SYMBOL(iwl_update_stats);
2928 #endif
2929
2930 const static char *get_csr_string(int cmd)
2931 {
2932         switch (cmd) {
2933                 IWL_CMD(CSR_HW_IF_CONFIG_REG);
2934                 IWL_CMD(CSR_INT_COALESCING);
2935                 IWL_CMD(CSR_INT);
2936                 IWL_CMD(CSR_INT_MASK);
2937                 IWL_CMD(CSR_FH_INT_STATUS);
2938                 IWL_CMD(CSR_GPIO_IN);
2939                 IWL_CMD(CSR_RESET);
2940                 IWL_CMD(CSR_GP_CNTRL);
2941                 IWL_CMD(CSR_HW_REV);
2942                 IWL_CMD(CSR_EEPROM_REG);
2943                 IWL_CMD(CSR_EEPROM_GP);
2944                 IWL_CMD(CSR_OTP_GP_REG);
2945                 IWL_CMD(CSR_GIO_REG);
2946                 IWL_CMD(CSR_GP_UCODE_REG);
2947                 IWL_CMD(CSR_GP_DRIVER_REG);
2948                 IWL_CMD(CSR_UCODE_DRV_GP1);
2949                 IWL_CMD(CSR_UCODE_DRV_GP2);
2950                 IWL_CMD(CSR_LED_REG);
2951                 IWL_CMD(CSR_DRAM_INT_TBL_REG);
2952                 IWL_CMD(CSR_GIO_CHICKEN_BITS);
2953                 IWL_CMD(CSR_ANA_PLL_CFG);
2954                 IWL_CMD(CSR_HW_REV_WA_REG);
2955                 IWL_CMD(CSR_DBG_HPET_MEM_REG);
2956         default:
2957                 return "UNKNOWN";
2958
2959         }
2960 }
2961
2962 void iwl_dump_csr(struct iwl_priv *priv)
2963 {
2964         int i;
2965         u32 csr_tbl[] = {
2966                 CSR_HW_IF_CONFIG_REG,
2967                 CSR_INT_COALESCING,
2968                 CSR_INT,
2969                 CSR_INT_MASK,
2970                 CSR_FH_INT_STATUS,
2971                 CSR_GPIO_IN,
2972                 CSR_RESET,
2973                 CSR_GP_CNTRL,
2974                 CSR_HW_REV,
2975                 CSR_EEPROM_REG,
2976                 CSR_EEPROM_GP,
2977                 CSR_OTP_GP_REG,
2978                 CSR_GIO_REG,
2979                 CSR_GP_UCODE_REG,
2980                 CSR_GP_DRIVER_REG,
2981                 CSR_UCODE_DRV_GP1,
2982                 CSR_UCODE_DRV_GP2,
2983                 CSR_LED_REG,
2984                 CSR_DRAM_INT_TBL_REG,
2985                 CSR_GIO_CHICKEN_BITS,
2986                 CSR_ANA_PLL_CFG,
2987                 CSR_HW_REV_WA_REG,
2988                 CSR_DBG_HPET_MEM_REG
2989         };
2990         IWL_ERR(priv, "CSR values:\n");
2991         IWL_ERR(priv, "(2nd byte of CSR_INT_COALESCING is "
2992                 "CSR_INT_PERIODIC_REG)\n");
2993         for (i = 0; i <  ARRAY_SIZE(csr_tbl); i++) {
2994                 IWL_ERR(priv, "  %25s: 0X%08x\n",
2995                         get_csr_string(csr_tbl[i]),
2996                         iwl_read32(priv, csr_tbl[i]));
2997         }
2998 }
2999 EXPORT_SYMBOL(iwl_dump_csr);
3000
3001 const static char *get_fh_string(int cmd)
3002 {
3003         switch (cmd) {
3004                 IWL_CMD(FH_RSCSR_CHNL0_STTS_WPTR_REG);
3005                 IWL_CMD(FH_RSCSR_CHNL0_RBDCB_BASE_REG);
3006                 IWL_CMD(FH_RSCSR_CHNL0_WPTR);
3007                 IWL_CMD(FH_MEM_RCSR_CHNL0_CONFIG_REG);
3008                 IWL_CMD(FH_MEM_RSSR_SHARED_CTRL_REG);
3009                 IWL_CMD(FH_MEM_RSSR_RX_STATUS_REG);
3010                 IWL_CMD(FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV);
3011                 IWL_CMD(FH_TSSR_TX_STATUS_REG);
3012                 IWL_CMD(FH_TSSR_TX_ERROR_REG);
3013         default:
3014                 return "UNKNOWN";
3015
3016         }
3017 }
3018
3019 int iwl_dump_fh(struct iwl_priv *priv, char **buf, bool display)
3020 {
3021         int i;
3022 #ifdef CONFIG_IWLWIFI_DEBUG
3023         int pos = 0;
3024         size_t bufsz = 0;
3025 #endif
3026         u32 fh_tbl[] = {
3027                 FH_RSCSR_CHNL0_STTS_WPTR_REG,
3028                 FH_RSCSR_CHNL0_RBDCB_BASE_REG,
3029                 FH_RSCSR_CHNL0_WPTR,
3030                 FH_MEM_RCSR_CHNL0_CONFIG_REG,
3031                 FH_MEM_RSSR_SHARED_CTRL_REG,
3032                 FH_MEM_RSSR_RX_STATUS_REG,
3033                 FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV,
3034                 FH_TSSR_TX_STATUS_REG,
3035                 FH_TSSR_TX_ERROR_REG
3036         };
3037 #ifdef CONFIG_IWLWIFI_DEBUG
3038         if (display) {
3039                 bufsz = ARRAY_SIZE(fh_tbl) * 48 + 40;
3040                 *buf = kmalloc(bufsz, GFP_KERNEL);
3041                 if (!*buf)
3042                         return -ENOMEM;
3043                 pos += scnprintf(*buf + pos, bufsz - pos,
3044                                 "FH register values:\n");
3045                 for (i = 0; i < ARRAY_SIZE(fh_tbl); i++) {
3046                         pos += scnprintf(*buf + pos, bufsz - pos,
3047                                 "  %34s: 0X%08x\n",
3048                                 get_fh_string(fh_tbl[i]),
3049                                 iwl_read_direct32(priv, fh_tbl[i]));
3050                 }
3051                 return pos;
3052         }
3053 #endif
3054         IWL_ERR(priv, "FH register values:\n");
3055         for (i = 0; i <  ARRAY_SIZE(fh_tbl); i++) {
3056                 IWL_ERR(priv, "  %34s: 0X%08x\n",
3057                         get_fh_string(fh_tbl[i]),
3058                         iwl_read_direct32(priv, fh_tbl[i]));
3059         }
3060         return 0;
3061 }
3062 EXPORT_SYMBOL(iwl_dump_fh);
3063
3064 static void iwl_force_rf_reset(struct iwl_priv *priv)
3065 {
3066         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3067                 return;
3068
3069         if (!iwl_is_associated(priv)) {
3070                 IWL_DEBUG_SCAN(priv, "force reset rejected: not associated\n");
3071                 return;
3072         }
3073         /*
3074          * There is no easy and better way to force reset the radio,
3075          * the only known method is switching channel which will force to
3076          * reset and tune the radio.
3077          * Use internal short scan (single channel) operation to should
3078          * achieve this objective.
3079          * Driver should reset the radio when number of consecutive missed
3080          * beacon, or any other uCode error condition detected.
3081          */
3082         IWL_DEBUG_INFO(priv, "perform radio reset.\n");
3083         iwl_internal_short_hw_scan(priv);
3084         return;
3085 }
3086
3087
3088 int iwl_force_reset(struct iwl_priv *priv, int mode)
3089 {
3090         struct iwl_force_reset *force_reset;
3091
3092         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3093                 return -EINVAL;
3094
3095         if (mode >= IWL_MAX_FORCE_RESET) {
3096                 IWL_DEBUG_INFO(priv, "invalid reset request.\n");
3097                 return -EINVAL;
3098         }
3099         force_reset = &priv->force_reset[mode];
3100         force_reset->reset_request_count++;
3101         if (force_reset->last_force_reset_jiffies &&
3102             time_after(force_reset->last_force_reset_jiffies +
3103             force_reset->reset_duration, jiffies)) {
3104                 IWL_DEBUG_INFO(priv, "force reset rejected\n");
3105                 force_reset->reset_reject_count++;
3106                 return -EAGAIN;
3107         }
3108         force_reset->reset_success_count++;
3109         force_reset->last_force_reset_jiffies = jiffies;
3110         IWL_DEBUG_INFO(priv, "perform force reset (%d)\n", mode);
3111         switch (mode) {
3112         case IWL_RF_RESET:
3113                 iwl_force_rf_reset(priv);
3114                 break;
3115         case IWL_FW_RESET:
3116                 IWL_ERR(priv, "On demand firmware reload\n");
3117                 /* Set the FW error flag -- cleared on iwl_down */
3118                 set_bit(STATUS_FW_ERROR, &priv->status);
3119                 wake_up_interruptible(&priv->wait_command_queue);
3120                 /*
3121                  * Keep the restart process from trying to send host
3122                  * commands by clearing the INIT status bit
3123                  */
3124                 clear_bit(STATUS_READY, &priv->status);
3125                 queue_work(priv->workqueue, &priv->restart);
3126                 break;
3127         }
3128         return 0;
3129 }
3130
3131 #ifdef CONFIG_PM
3132
3133 int iwl_pci_suspend(struct pci_dev *pdev, pm_message_t state)
3134 {
3135         struct iwl_priv *priv = pci_get_drvdata(pdev);
3136
3137         /*
3138          * This function is called when system goes into suspend state
3139          * mac80211 will call iwl_mac_stop() from the mac80211 suspend function
3140          * first but since iwl_mac_stop() has no knowledge of who the caller is,
3141          * it will not call apm_ops.stop() to stop the DMA operation.
3142          * Calling apm_ops.stop here to make sure we stop the DMA.
3143          */
3144         priv->cfg->ops->lib->apm_ops.stop(priv);
3145
3146         pci_save_state(pdev);
3147         pci_disable_device(pdev);
3148         pci_set_power_state(pdev, PCI_D3hot);
3149
3150         return 0;
3151 }
3152 EXPORT_SYMBOL(iwl_pci_suspend);
3153
3154 int iwl_pci_resume(struct pci_dev *pdev)
3155 {
3156         struct iwl_priv *priv = pci_get_drvdata(pdev);
3157         int ret;
3158
3159         pci_set_power_state(pdev, PCI_D0);
3160         ret = pci_enable_device(pdev);
3161         if (ret)
3162                 return ret;
3163         pci_restore_state(pdev);
3164         iwl_enable_interrupts(priv);
3165
3166         return 0;
3167 }
3168 EXPORT_SYMBOL(iwl_pci_resume);
3169
3170 #endif /* CONFIG_PM */