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         /*
 901          * Assign the lowest rate -- should really get this from
 902          * the beacon skb from mac80211.
 903          */
 904         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)
 905                 return IWL_RATE_1M_PLCP;
 906         else
 907                 return IWL_RATE_6M_PLCP;
 908 }
 909 EXPORT_SYMBOL(iwl_rate_get_lowest_plcp);
 910
 911 void iwl_set_rxon_ht(struct iwl_priv *priv, struct iwl_ht_config *ht_conf)
 912 {
 913         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
 914
 915         if (!ht_conf->is_ht) {
 916                 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
 917                         RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK |
 918                         RXON_FLG_HT40_PROT_MSK |
 919                         RXON_FLG_HT_PROT_MSK);
 920                 return;
 921         }
 922
 923         /* FIXME: if the definition of ht_protection changed, the "translation"
 924          * will be needed for rxon->flags
 925          */
 926         rxon->flags |= cpu_to_le32(ht_conf->ht_protection << RXON_FLG_HT_OPERATING_MODE_POS);
 927
 928         /* Set up channel bandwidth:
 929          * 20 MHz only, 20/40 mixed or pure 40 if ht40 ok */
 930         /* clear the HT channel mode before set the mode */
 931         rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
 932                          RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
 933         if (iwl_is_ht40_tx_allowed(priv, NULL)) {
 934                 /* pure ht40 */
 935                 if (ht_conf->ht_protection == IEEE80211_HT_OP_MODE_PROTECTION_20MHZ) {
 936                         rxon->flags |= RXON_FLG_CHANNEL_MODE_PURE_40;
 937                         /* Note: control channel is opposite of extension channel */
 938                         switch (ht_conf->extension_chan_offset) {
 939                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 940                                 rxon->flags &= ~RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
 941                                 break;
 942                         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 943                                 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
 944                                 break;
 945                         }
 946                 } else {
 947                         /* Note: control channel is opposite of extension channel */
 948                         switch (ht_conf->extension_chan_offset) {
 949                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 950                                 rxon->flags &= ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
 951                                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
 952                                 break;
 953                         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 954                                 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
 955                                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
 956                                 break;
 957                         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
 958                         default:
 959                                 /* channel location only valid if in Mixed mode */
 960                                 IWL_ERR(priv, "invalid extension channel offset\n");
 961                                 break;
 962                         }
 963                 }
 964         } else {
 965                 rxon->flags |= RXON_FLG_CHANNEL_MODE_LEGACY;
 966         }
 967
 968         if (priv->cfg->ops->hcmd->set_rxon_chain)
 969                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
 970
 971         IWL_DEBUG_ASSOC(priv, "rxon flags 0x%X operation mode :0x%X "
 972                         "extension channel offset 0x%x\n",
 973                         le32_to_cpu(rxon->flags), ht_conf->ht_protection,
 974                         ht_conf->extension_chan_offset);
 975         return;
 976 }
 977 EXPORT_SYMBOL(iwl_set_rxon_ht);
 978
 979 #define IWL_NUM_RX_CHAINS_MULTIPLE      3
 980 #define IWL_NUM_RX_CHAINS_SINGLE        2
 981 #define IWL_NUM_IDLE_CHAINS_DUAL        2
 982 #define IWL_NUM_IDLE_CHAINS_SINGLE      1
 983
 984 /*
 985  * Determine how many receiver/antenna chains to use.
 986  *
 987  * More provides better reception via diversity.  Fewer saves power
 988  * at the expense of throughput, but only when not in powersave to
 989  * start with.
 990  *
 991  * MIMO (dual stream) requires at least 2, but works better with 3.
 992  * This does not determine *which* chains to use, just how many.
 993  */
 994 static int iwl_get_active_rx_chain_count(struct iwl_priv *priv)
 995 {
 996         /* # of Rx chains to use when expecting MIMO. */
 997         if (is_single_rx_stream(priv))
 998                 return IWL_NUM_RX_CHAINS_SINGLE;
 999         else
1000                 return IWL_NUM_RX_CHAINS_MULTIPLE;
1001 }
1002
1003 /*
1004  * When we are in power saving mode, unless device support spatial
1005  * multiplexing power save, use the active count for rx chain count.
1006  */
1007 static int iwl_get_idle_rx_chain_count(struct iwl_priv *priv, int active_cnt)
1008 {
1009         /* # Rx chains when idling, depending on SMPS mode */
1010         switch (priv->current_ht_config.smps) {
1011         case IEEE80211_SMPS_STATIC:
1012         case IEEE80211_SMPS_DYNAMIC:
1013                 return IWL_NUM_IDLE_CHAINS_SINGLE;
1014         case IEEE80211_SMPS_OFF:
1015                 return active_cnt;
1016         default:
1017                 WARN(1, "invalid SMPS mode %d",
1018                      priv->current_ht_config.smps);
1019                 return active_cnt;
1020         }
1021 }
1022
1023 /* up to 4 chains */
1024 static u8 iwl_count_chain_bitmap(u32 chain_bitmap)
1025 {
1026         u8 res;
1027         res = (chain_bitmap & BIT(0)) >> 0;
1028         res += (chain_bitmap & BIT(1)) >> 1;
1029         res += (chain_bitmap & BIT(2)) >> 2;
1030         res += (chain_bitmap & BIT(3)) >> 3;
1031         return res;
1032 }
1033
1034 /**
1035  * iwl_is_monitor_mode - Determine if interface in monitor mode
1036  *
1037  * priv->iw_mode is set in add_interface, but add_interface is
1038  * never called for monitor mode. The only way mac80211 informs us about
1039  * monitor mode is through configuring filters (call to configure_filter).
1040  */
1041 bool iwl_is_monitor_mode(struct iwl_priv *priv)
1042 {
1043         return !!(priv->staging_rxon.filter_flags & RXON_FILTER_PROMISC_MSK);
1044 }
1045 EXPORT_SYMBOL(iwl_is_monitor_mode);
1046
1047 /**
1048  * iwl_set_rxon_chain - Set up Rx chain usage in "staging" RXON image
1049  *
1050  * Selects how many and which Rx receivers/antennas/chains to use.
1051  * This should not be used for scan command ... it puts data in wrong place.
1052  */
1053 void iwl_set_rxon_chain(struct iwl_priv *priv)
1054 {
1055         bool is_single = is_single_rx_stream(priv);
1056         bool is_cam = !test_bit(STATUS_POWER_PMI, &priv->status);
1057         u8 idle_rx_cnt, active_rx_cnt, valid_rx_cnt;
1058         u32 active_chains;
1059         u16 rx_chain;
1060
1061         /* Tell uCode which antennas are actually connected.
1062          * Before first association, we assume all antennas are connected.
1063          * Just after first association, iwl_chain_noise_calibration()
1064          *    checks which antennas actually *are* connected. */
1065          if (priv->chain_noise_data.active_chains)
1066                 active_chains = priv->chain_noise_data.active_chains;
1067         else
1068                 active_chains = priv->hw_params.valid_rx_ant;
1069
1070         rx_chain = active_chains << RXON_RX_CHAIN_VALID_POS;
1071
1072         /* How many receivers should we use? */
1073         active_rx_cnt = iwl_get_active_rx_chain_count(priv);
1074         idle_rx_cnt = iwl_get_idle_rx_chain_count(priv, active_rx_cnt);
1075
1076
1077         /* correct rx chain count according hw settings
1078          * and chain noise calibration
1079          */
1080         valid_rx_cnt = iwl_count_chain_bitmap(active_chains);
1081         if (valid_rx_cnt < active_rx_cnt)
1082                 active_rx_cnt = valid_rx_cnt;
1083
1084         if (valid_rx_cnt < idle_rx_cnt)
1085                 idle_rx_cnt = valid_rx_cnt;
1086
1087         rx_chain |= active_rx_cnt << RXON_RX_CHAIN_MIMO_CNT_POS;
1088         rx_chain |= idle_rx_cnt  << RXON_RX_CHAIN_CNT_POS;
1089
1090         /* copied from 'iwl_bg_request_scan()' */
1091         /* Force use of chains B and C (0x6) for Rx for 4965
1092          * Avoid A (0x1) because of its off-channel reception on A-band.
1093          * MIMO is not used here, but value is required */
1094         if (iwl_is_monitor_mode(priv) &&
1095             !(priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) &&
1096             ((priv->hw_rev & CSR_HW_REV_TYPE_MSK) == CSR_HW_REV_TYPE_4965)) {
1097                 rx_chain = ANT_ABC << RXON_RX_CHAIN_VALID_POS;
1098                 rx_chain |= ANT_BC << RXON_RX_CHAIN_FORCE_SEL_POS;
1099                 rx_chain |= ANT_ABC << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS;
1100                 rx_chain |= 0x1 << RXON_RX_CHAIN_DRIVER_FORCE_POS;
1101         }
1102
1103         priv->staging_rxon.rx_chain = cpu_to_le16(rx_chain);
1104
1105         if (!is_single && (active_rx_cnt >= IWL_NUM_RX_CHAINS_SINGLE) && is_cam)
1106                 priv->staging_rxon.rx_chain |= RXON_RX_CHAIN_MIMO_FORCE_MSK;
1107         else
1108                 priv->staging_rxon.rx_chain &= ~RXON_RX_CHAIN_MIMO_FORCE_MSK;
1109
1110         IWL_DEBUG_ASSOC(priv, "rx_chain=0x%X active=%d idle=%d\n",
1111                         priv->staging_rxon.rx_chain,
1112                         active_rx_cnt, idle_rx_cnt);
1113
1114         WARN_ON(active_rx_cnt == 0 || idle_rx_cnt == 0 ||
1115                 active_rx_cnt < idle_rx_cnt);
1116 }
1117 EXPORT_SYMBOL(iwl_set_rxon_chain);
1118
1119 /**
1120  * iwl_set_rxon_channel - Set the phymode and channel values in staging RXON
1121  * @phymode: MODE_IEEE80211A sets to 5.2GHz; all else set to 2.4GHz
1122  * @channel: Any channel valid for the requested phymode
1123
1124  * In addition to setting the staging RXON, priv->phymode is also set.
1125  *
1126  * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
1127  * in the staging RXON flag structure based on the phymode
1128  */
1129 int iwl_set_rxon_channel(struct iwl_priv *priv, struct ieee80211_channel *ch)
1130 {
1131         enum ieee80211_band band = ch->band;
1132         u16 channel = ieee80211_frequency_to_channel(ch->center_freq);
1133
1134         if (!iwl_get_channel_info(priv, band, channel)) {
1135                 IWL_DEBUG_INFO(priv, "Could not set channel to %d [%d]\n",
1136                                channel, band);
1137                 return -EINVAL;
1138         }
1139
1140         if ((le16_to_cpu(priv->staging_rxon.channel) == channel) &&
1141             (priv->band == band))
1142                 return 0;
1143
1144         priv->staging_rxon.channel = cpu_to_le16(channel);
1145         if (band == IEEE80211_BAND_5GHZ)
1146                 priv->staging_rxon.flags &= ~RXON_FLG_BAND_24G_MSK;
1147         else
1148                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
1149
1150         priv->band = band;
1151
1152         IWL_DEBUG_INFO(priv, "Staging channel set to %d [%d]\n", channel, band);
1153
1154         return 0;
1155 }
1156 EXPORT_SYMBOL(iwl_set_rxon_channel);
1157
1158 void iwl_set_flags_for_band(struct iwl_priv *priv,
1159                             enum ieee80211_band band)
1160 {
1161         if (band == IEEE80211_BAND_5GHZ) {
1162                 priv->staging_rxon.flags &=
1163                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
1164                       | RXON_FLG_CCK_MSK);
1165                 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
1166         } else {
1167                 /* Copied from iwl_post_associate() */
1168                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
1169                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
1170                 else
1171                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
1172
1173                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
1174                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
1175
1176                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
1177                 priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
1178                 priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
1179         }
1180 }
1181
1182 /*
1183  * initialize rxon structure with default values from eeprom
1184  */
1185 void iwl_connection_init_rx_config(struct iwl_priv *priv, int mode)
1186 {
1187         const struct iwl_channel_info *ch_info;
1188
1189         memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
1190
1191         switch (mode) {
1192         case NL80211_IFTYPE_AP:
1193                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
1194                 break;
1195
1196         case NL80211_IFTYPE_STATION:
1197                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
1198                 priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
1199                 break;
1200
1201         case NL80211_IFTYPE_ADHOC:
1202                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
1203                 priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
1204                 priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
1205                                                   RXON_FILTER_ACCEPT_GRP_MSK;
1206                 break;
1207
1208         default:
1209                 IWL_ERR(priv, "Unsupported interface type %d\n", mode);
1210                 break;
1211         }
1212
1213 #if 0
1214         /* TODO:  Figure out when short_preamble would be set and cache from
1215          * that */
1216         if (!hw_to_local(priv->hw)->short_preamble)
1217                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
1218         else
1219                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
1220 #endif
1221
1222         ch_info = iwl_get_channel_info(priv, priv->band,
1223                                        le16_to_cpu(priv->active_rxon.channel));
1224
1225         if (!ch_info)
1226                 ch_info = &priv->channel_info[0];
1227
1228         priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
1229         priv->band = ch_info->band;
1230
1231         iwl_set_flags_for_band(priv, priv->band);
1232
1233         priv->staging_rxon.ofdm_basic_rates =
1234             (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
1235         priv->staging_rxon.cck_basic_rates =
1236             (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
1237
1238         /* clear both MIX and PURE40 mode flag */
1239         priv->staging_rxon.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED |
1240                                         RXON_FLG_CHANNEL_MODE_PURE_40);
1241         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
1242         memcpy(priv->staging_rxon.wlap_bssid_addr, priv->mac_addr, ETH_ALEN);
1243         priv->staging_rxon.ofdm_ht_single_stream_basic_rates = 0xff;
1244         priv->staging_rxon.ofdm_ht_dual_stream_basic_rates = 0xff;
1245         priv->staging_rxon.ofdm_ht_triple_stream_basic_rates = 0xff;
1246 }
1247 EXPORT_SYMBOL(iwl_connection_init_rx_config);
1248
1249 static void iwl_set_rate(struct iwl_priv *priv)
1250 {
1251         const struct ieee80211_supported_band *hw = NULL;
1252         struct ieee80211_rate *rate;
1253         int i;
1254
1255         hw = iwl_get_hw_mode(priv, priv->band);
1256         if (!hw) {
1257                 IWL_ERR(priv, "Failed to set rate: unable to get hw mode\n");
1258                 return;
1259         }
1260
1261         priv->active_rate = 0;
1262
1263         for (i = 0; i < hw->n_bitrates; i++) {
1264                 rate = &(hw->bitrates[i]);
1265                 if (rate->hw_value < IWL_RATE_COUNT_LEGACY)
1266                         priv->active_rate |= (1 << rate->hw_value);
1267         }
1268
1269         IWL_DEBUG_RATE(priv, "Set active_rate = %0x\n", priv->active_rate);
1270
1271         priv->staging_rxon.cck_basic_rates =
1272             (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
1273
1274         priv->staging_rxon.ofdm_basic_rates =
1275            (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
1276 }
1277
1278 void iwl_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
1279 {
1280         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1281         struct iwl_rxon_cmd *rxon = (void *)&priv->active_rxon;
1282         struct iwl_csa_notification *csa = &(pkt->u.csa_notif);
1283
1284         if (priv->switch_rxon.switch_in_progress) {
1285                 if (!le32_to_cpu(csa->status) &&
1286                     (csa->channel == priv->switch_rxon.channel)) {
1287                         rxon->channel = csa->channel;
1288                         priv->staging_rxon.channel = csa->channel;
1289                         IWL_DEBUG_11H(priv, "CSA notif: channel %d\n",
1290                               le16_to_cpu(csa->channel));
1291                 } else
1292                         IWL_ERR(priv, "CSA notif (fail) : channel %d\n",
1293                               le16_to_cpu(csa->channel));
1294
1295                 priv->switch_rxon.switch_in_progress = false;
1296         }
1297 }
1298 EXPORT_SYMBOL(iwl_rx_csa);
1299
1300 #ifdef CONFIG_IWLWIFI_DEBUG
1301 void iwl_print_rx_config_cmd(struct iwl_priv *priv)
1302 {
1303         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
1304
1305         IWL_DEBUG_RADIO(priv, "RX CONFIG:\n");
1306         iwl_print_hex_dump(priv, IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
1307         IWL_DEBUG_RADIO(priv, "u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
1308         IWL_DEBUG_RADIO(priv, "u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
1309         IWL_DEBUG_RADIO(priv, "u32 filter_flags: 0x%08x\n",
1310                         le32_to_cpu(rxon->filter_flags));
1311         IWL_DEBUG_RADIO(priv, "u8 dev_type: 0x%x\n", rxon->dev_type);
1312         IWL_DEBUG_RADIO(priv, "u8 ofdm_basic_rates: 0x%02x\n",
1313                         rxon->ofdm_basic_rates);
1314         IWL_DEBUG_RADIO(priv, "u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
1315         IWL_DEBUG_RADIO(priv, "u8[6] node_addr: %pM\n", rxon->node_addr);
1316         IWL_DEBUG_RADIO(priv, "u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
1317         IWL_DEBUG_RADIO(priv, "u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
1318 }
1319 EXPORT_SYMBOL(iwl_print_rx_config_cmd);
1320 #endif
1321 /**
1322  * iwl_irq_handle_error - called for HW or SW error interrupt from card
1323  */
1324 void iwl_irq_handle_error(struct iwl_priv *priv)
1325 {
1326         /* Set the FW error flag -- cleared on iwl_down */
1327         set_bit(STATUS_FW_ERROR, &priv->status);
1328
1329         /* Cancel currently queued command. */
1330         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
1331
1332         priv->cfg->ops->lib->dump_nic_error_log(priv);
1333         if (priv->cfg->ops->lib->dump_csr)
1334                 priv->cfg->ops->lib->dump_csr(priv);
1335         if (priv->cfg->ops->lib->dump_fh)
1336                 priv->cfg->ops->lib->dump_fh(priv, NULL, false);
1337         priv->cfg->ops->lib->dump_nic_event_log(priv, false, NULL, false);
1338 #ifdef CONFIG_IWLWIFI_DEBUG
1339         if (iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS)
1340                 iwl_print_rx_config_cmd(priv);
1341 #endif
1342
1343         wake_up_interruptible(&priv->wait_command_queue);
1344
1345         /* Keep the restart process from trying to send host
1346          * commands by clearing the INIT status bit */
1347         clear_bit(STATUS_READY, &priv->status);
1348
1349         if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1350                 IWL_DEBUG(priv, IWL_DL_FW_ERRORS,
1351                           "Restarting adapter due to uCode error.\n");
1352
1353                 if (priv->cfg->mod_params->restart_fw)
1354                         queue_work(priv->workqueue, &priv->restart);
1355         }
1356 }
1357 EXPORT_SYMBOL(iwl_irq_handle_error);
1358
1359 int iwl_apm_stop_master(struct iwl_priv *priv)
1360 {
1361         int ret = 0;
1362
1363         /* stop device's busmaster DMA activity */
1364         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
1365
1366         ret = iwl_poll_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_MASTER_DISABLED,
1367                         CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
1368         if (ret)
1369                 IWL_WARN(priv, "Master Disable Timed Out, 100 usec\n");
1370
1371         IWL_DEBUG_INFO(priv, "stop master\n");
1372
1373         return ret;
1374 }
1375 EXPORT_SYMBOL(iwl_apm_stop_master);
1376
1377 void iwl_apm_stop(struct iwl_priv *priv)
1378 {
1379         IWL_DEBUG_INFO(priv, "Stop card, put in low power state\n");
1380
1381         /* Stop device's DMA activity */
1382         iwl_apm_stop_master(priv);
1383
1384         /* Reset the entire device */
1385         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
1386
1387         udelay(10);
1388
1389         /*
1390          * Clear "initialization complete" bit to move adapter from
1391          * D0A* (powered-up Active) --> D0U* (Uninitialized) state.
1392          */
1393         iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1394 }
1395 EXPORT_SYMBOL(iwl_apm_stop);
1396
1397
1398 /*
1399  * Start up NIC's basic functionality after it has been reset
1400  * (e.g. after platform boot, or shutdown via iwl_apm_stop())
1401  * NOTE:  This does not load uCode nor start the embedded processor
1402  */
1403 int iwl_apm_init(struct iwl_priv *priv)
1404 {
1405         int ret = 0;
1406         u16 lctl;
1407
1408         IWL_DEBUG_INFO(priv, "Init card's basic functions\n");
1409
1410         /*
1411          * Use "set_bit" below rather than "write", to preserve any hardware
1412          * bits already set by default after reset.
1413          */
1414
1415         /* Disable L0S exit timer (platform NMI Work/Around) */
1416         iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
1417                           CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
1418
1419         /*
1420          * Disable L0s without affecting L1;
1421          *  don't wait for ICH L0s (ICH bug W/A)
1422          */
1423         iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
1424                           CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
1425
1426         /* Set FH wait threshold to maximum (HW error during stress W/A) */
1427         iwl_set_bit(priv, CSR_DBG_HPET_MEM_REG, CSR_DBG_HPET_MEM_REG_VAL);
1428
1429         /*
1430          * Enable HAP INTA (interrupt from management bus) to
1431          * wake device's PCI Express link L1a -> L0s
1432          * NOTE:  This is no-op for 3945 (non-existant bit)
1433          */
1434         iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1435                                     CSR_HW_IF_CONFIG_REG_BIT_HAP_WAKE_L1A);
1436
1437         /*
1438          * HW bug W/A for instability in PCIe bus L0->L0S->L1 transition.
1439          * Check if BIOS (or OS) enabled L1-ASPM on this device.
1440          * If so (likely), disable L0S, so device moves directly L0->L1;
1441          *    costs negligible amount of power savings.
1442          * If not (unlikely), enable L0S, so there is at least some
1443          *    power savings, even without L1.
1444          */
1445         if (priv->cfg->set_l0s) {
1446                 lctl = iwl_pcie_link_ctl(priv);
1447                 if ((lctl & PCI_CFG_LINK_CTRL_VAL_L1_EN) ==
1448                                         PCI_CFG_LINK_CTRL_VAL_L1_EN) {
1449                         /* L1-ASPM enabled; disable(!) L0S  */
1450                         iwl_set_bit(priv, CSR_GIO_REG,
1451                                         CSR_GIO_REG_VAL_L0S_ENABLED);
1452                         IWL_DEBUG_POWER(priv, "L1 Enabled; Disabling L0S\n");
1453                 } else {
1454                         /* L1-ASPM disabled; enable(!) L0S */
1455                         iwl_clear_bit(priv, CSR_GIO_REG,
1456                                         CSR_GIO_REG_VAL_L0S_ENABLED);
1457                         IWL_DEBUG_POWER(priv, "L1 Disabled; Enabling L0S\n");
1458                 }
1459         }
1460
1461         /* Configure analog phase-lock-loop before activating to D0A */
1462         if (priv->cfg->pll_cfg_val)
1463                 iwl_set_bit(priv, CSR_ANA_PLL_CFG, priv->cfg->pll_cfg_val);
1464
1465         /*
1466          * Set "initialization complete" bit to move adapter from
1467          * D0U* --> D0A* (powered-up active) state.
1468          */
1469         iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1470
1471         /*
1472          * Wait for clock stabilization; once stabilized, access to
1473          * device-internal resources is supported, e.g. iwl_write_prph()
1474          * and accesses to uCode SRAM.
1475          */
1476         ret = iwl_poll_bit(priv, CSR_GP_CNTRL,
1477                         CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
1478                         CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
1479         if (ret < 0) {
1480                 IWL_DEBUG_INFO(priv, "Failed to init the card\n");
1481                 goto out;
1482         }
1483
1484         /*
1485          * Enable DMA and BSM (if used) clocks, wait for them to stabilize.
1486          * BSM (Boostrap State Machine) is only in 3945 and 4965;
1487          * later devices (i.e. 5000 and later) have non-volatile SRAM,
1488          * and don't need BSM to restore data after power-saving sleep.
1489          *
1490          * Write to "CLK_EN_REG"; "1" bits enable clocks, while "0" bits
1491          * do not disable clocks.  This preserves any hardware bits already
1492          * set by default in "CLK_CTRL_REG" after reset.
1493          */
1494         if (priv->cfg->use_bsm)
1495                 iwl_write_prph(priv, APMG_CLK_EN_REG,
1496                         APMG_CLK_VAL_DMA_CLK_RQT | APMG_CLK_VAL_BSM_CLK_RQT);
1497         else
1498                 iwl_write_prph(priv, APMG_CLK_EN_REG,
1499                         APMG_CLK_VAL_DMA_CLK_RQT);
1500         udelay(20);
1501
1502         /* Disable L1-Active */
1503         iwl_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
1504                           APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
1505
1506 out:
1507         return ret;
1508 }
1509 EXPORT_SYMBOL(iwl_apm_init);
1510
1511
1512
1513 void iwl_configure_filter(struct ieee80211_hw *hw,
1514                           unsigned int changed_flags,
1515                           unsigned int *total_flags,
1516                           u64 multicast)
1517 {
1518         struct iwl_priv *priv = hw->priv;
1519         __le32 *filter_flags = &priv->staging_rxon.filter_flags;
1520
1521         IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
1522                         changed_flags, *total_flags);
1523
1524         if (changed_flags & (FIF_OTHER_BSS | FIF_PROMISC_IN_BSS)) {
1525                 if (*total_flags & (FIF_OTHER_BSS | FIF_PROMISC_IN_BSS))
1526                         *filter_flags |= RXON_FILTER_PROMISC_MSK;
1527                 else
1528                         *filter_flags &= ~RXON_FILTER_PROMISC_MSK;
1529         }
1530         if (changed_flags & FIF_ALLMULTI) {
1531                 if (*total_flags & FIF_ALLMULTI)
1532                         *filter_flags |= RXON_FILTER_ACCEPT_GRP_MSK;
1533                 else
1534                         *filter_flags &= ~RXON_FILTER_ACCEPT_GRP_MSK;
1535         }
1536         if (changed_flags & FIF_CONTROL) {
1537                 if (*total_flags & FIF_CONTROL)
1538                         *filter_flags |= RXON_FILTER_CTL2HOST_MSK;
1539                 else
1540                         *filter_flags &= ~RXON_FILTER_CTL2HOST_MSK;
1541         }
1542         if (changed_flags & FIF_BCN_PRBRESP_PROMISC) {
1543                 if (*total_flags & FIF_BCN_PRBRESP_PROMISC)
1544                         *filter_flags |= RXON_FILTER_BCON_AWARE_MSK;
1545                 else
1546                         *filter_flags &= ~RXON_FILTER_BCON_AWARE_MSK;
1547         }
1548
1549         /* We avoid iwl_commit_rxon here to commit the new filter flags
1550          * since mac80211 will call ieee80211_hw_config immediately.
1551          * (mc_list is not supported at this time). Otherwise, we need to
1552          * queue a background iwl_commit_rxon work.
1553          */
1554
1555         *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
1556                         FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
1557 }
1558 EXPORT_SYMBOL(iwl_configure_filter);
1559
1560 int iwl_set_hw_params(struct iwl_priv *priv)
1561 {
1562         priv->hw_params.max_rxq_size = RX_QUEUE_SIZE;
1563         priv->hw_params.max_rxq_log = RX_QUEUE_SIZE_LOG;
1564         if (priv->cfg->mod_params->amsdu_size_8K)
1565                 priv->hw_params.rx_page_order = get_order(IWL_RX_BUF_SIZE_8K);
1566         else
1567                 priv->hw_params.rx_page_order = get_order(IWL_RX_BUF_SIZE_4K);
1568
1569         priv->hw_params.max_beacon_itrvl = IWL_MAX_UCODE_BEACON_INTERVAL;
1570
1571         if (priv->cfg->mod_params->disable_11n)
1572                 priv->cfg->sku &= ~IWL_SKU_N;
1573
1574         /* Device-specific setup */
1575         return priv->cfg->ops->lib->set_hw_params(priv);
1576 }
1577 EXPORT_SYMBOL(iwl_set_hw_params);
1578
1579 int iwl_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force)
1580 {
1581         int ret = 0;
1582         s8 prev_tx_power = priv->tx_power_user_lmt;
1583
1584         if (tx_power < IWL_TX_POWER_TARGET_POWER_MIN) {
1585                 IWL_WARN(priv, "Requested user TXPOWER %d below lower limit %d.\n",
1586                          tx_power,
1587                          IWL_TX_POWER_TARGET_POWER_MIN);
1588                 return -EINVAL;
1589         }
1590
1591         if (tx_power > priv->tx_power_device_lmt) {
1592                 IWL_WARN(priv,
1593                         "Requested user TXPOWER %d above upper limit %d.\n",
1594                          tx_power, priv->tx_power_device_lmt);
1595                 return -EINVAL;
1596         }
1597
1598         if (priv->tx_power_user_lmt != tx_power)
1599                 force = true;
1600
1601         /* if nic is not up don't send command */
1602         if (iwl_is_ready_rf(priv)) {
1603                 priv->tx_power_user_lmt = tx_power;
1604                 if (force && priv->cfg->ops->lib->send_tx_power)
1605                         ret = priv->cfg->ops->lib->send_tx_power(priv);
1606                 else if (!priv->cfg->ops->lib->send_tx_power)
1607                         ret = -EOPNOTSUPP;
1608                 /*
1609                  * if fail to set tx_power, restore the orig. tx power
1610                  */
1611                 if (ret)
1612                         priv->tx_power_user_lmt = prev_tx_power;
1613         }
1614
1615         /*
1616          * Even this is an async host command, the command
1617          * will always report success from uCode
1618          * So once driver can placing the command into the queue
1619          * successfully, driver can use priv->tx_power_user_lmt
1620          * to reflect the current tx power
1621          */
1622         return ret;
1623 }
1624 EXPORT_SYMBOL(iwl_set_tx_power);
1625
1626 irqreturn_t iwl_isr_legacy(int irq, void *data)
1627 {
1628         struct iwl_priv *priv = data;
1629         u32 inta, inta_mask;
1630         u32 inta_fh;
1631         if (!priv)
1632                 return IRQ_NONE;
1633
1634         spin_lock(&priv->lock);
1635
1636         /* Disable (but don't clear!) interrupts here to avoid
1637          *    back-to-back ISRs and sporadic interrupts from our NIC.
1638          * If we have something to service, the tasklet will re-enable ints.
1639          * If we *don't* have something, we'll re-enable before leaving here. */
1640         inta_mask = iwl_read32(priv, CSR_INT_MASK);  /* just for debug */
1641         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
1642
1643         /* Discover which interrupts are active/pending */
1644         inta = iwl_read32(priv, CSR_INT);
1645         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1646
1647         /* Ignore interrupt if there's nothing in NIC to service.
1648          * This may be due to IRQ shared with another device,
1649          * or due to sporadic interrupts thrown from our NIC. */
1650         if (!inta && !inta_fh) {
1651                 IWL_DEBUG_ISR(priv, "Ignore interrupt, inta == 0, inta_fh == 0\n");
1652                 goto none;
1653         }
1654
1655         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
1656                 /* Hardware disappeared. It might have already raised
1657                  * an interrupt */
1658                 IWL_WARN(priv, "HARDWARE GONE?? INTA == 0x%08x\n", inta);
1659                 goto unplugged;
1660         }
1661
1662         IWL_DEBUG_ISR(priv, "ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1663                       inta, inta_mask, inta_fh);
1664
1665         inta &= ~CSR_INT_BIT_SCD;
1666
1667         /* iwl_irq_tasklet() will service interrupts and re-enable them */
1668         if (likely(inta || inta_fh))
1669                 tasklet_schedule(&priv->irq_tasklet);
1670
1671  unplugged:
1672         spin_unlock(&priv->lock);
1673         return IRQ_HANDLED;
1674
1675  none:
1676         /* re-enable interrupts here since we don't have anything to service. */
1677         /* only Re-enable if diabled by irq */
1678         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1679                 iwl_enable_interrupts(priv);
1680         spin_unlock(&priv->lock);
1681         return IRQ_NONE;
1682 }
1683 EXPORT_SYMBOL(iwl_isr_legacy);
1684
1685 int iwl_send_bt_config(struct iwl_priv *priv)
1686 {
1687         struct iwl_bt_cmd bt_cmd = {
1688                 .lead_time = BT_LEAD_TIME_DEF,
1689                 .max_kill = BT_MAX_KILL_DEF,
1690                 .kill_ack_mask = 0,
1691                 .kill_cts_mask = 0,
1692         };
1693
1694         if (!bt_coex_active)
1695                 bt_cmd.flags = BT_COEX_DISABLE;
1696         else
1697                 bt_cmd.flags = BT_COEX_ENABLE;
1698
1699         IWL_DEBUG_INFO(priv, "BT coex %s\n",
1700                 (bt_cmd.flags == BT_COEX_DISABLE) ? "disable" : "active");
1701
1702         return iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG,
1703                                 sizeof(struct iwl_bt_cmd), &bt_cmd);
1704 }
1705 EXPORT_SYMBOL(iwl_send_bt_config);
1706
1707 int iwl_send_statistics_request(struct iwl_priv *priv, u8 flags, bool clear)
1708 {
1709         struct iwl_statistics_cmd statistics_cmd = {
1710                 .configuration_flags =
1711                         clear ? IWL_STATS_CONF_CLEAR_STATS : 0,
1712         };
1713
1714         if (flags & CMD_ASYNC)
1715                 return iwl_send_cmd_pdu_async(priv, REPLY_STATISTICS_CMD,
1716                                                sizeof(struct iwl_statistics_cmd),
1717                                                &statistics_cmd, NULL);
1718         else
1719                 return iwl_send_cmd_pdu(priv, REPLY_STATISTICS_CMD,
1720                                         sizeof(struct iwl_statistics_cmd),
1721                                         &statistics_cmd);
1722 }
1723 EXPORT_SYMBOL(iwl_send_statistics_request);
1724
1725 /**
1726  * iwl_verify_inst_sparse - verify runtime uCode image in card vs. host,
1727  *   using sample data 100 bytes apart.  If these sample points are good,
1728  *   it's a pretty good bet that everything between them is good, too.
1729  */
1730 static int iwlcore_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
1731 {
1732         u32 val;
1733         int ret = 0;
1734         u32 errcnt = 0;
1735         u32 i;
1736
1737         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
1738
1739         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
1740                 /* read data comes through single port, auto-incr addr */
1741                 /* NOTE: Use the debugless read so we don't flood kernel log
1742                  * if IWL_DL_IO is set */
1743                 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
1744                         i + IWL49_RTC_INST_LOWER_BOUND);
1745                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1746                 if (val != le32_to_cpu(*image)) {
1747                         ret = -EIO;
1748                         errcnt++;
1749                         if (errcnt >= 3)
1750                                 break;
1751                 }
1752         }
1753
1754         return ret;
1755 }
1756
1757 /**
1758  * iwlcore_verify_inst_full - verify runtime uCode image in card vs. host,
1759  *     looking at all data.
1760  */
1761 static int iwl_verify_inst_full(struct iwl_priv *priv, __le32 *image,
1762                                  u32 len)
1763 {
1764         u32 val;
1765         u32 save_len = len;
1766         int ret = 0;
1767         u32 errcnt;
1768
1769         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
1770
1771         iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
1772                            IWL49_RTC_INST_LOWER_BOUND);
1773
1774         errcnt = 0;
1775         for (; len > 0; len -= sizeof(u32), image++) {
1776                 /* read data comes through single port, auto-incr addr */
1777                 /* NOTE: Use the debugless read so we don't flood kernel log
1778                  * if IWL_DL_IO is set */
1779                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1780                 if (val != le32_to_cpu(*image)) {
1781                         IWL_ERR(priv, "uCode INST section is invalid at "
1782                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
1783                                   save_len - len, val, le32_to_cpu(*image));
1784                         ret = -EIO;
1785                         errcnt++;
1786                         if (errcnt >= 20)
1787                                 break;
1788                 }
1789         }
1790
1791         if (!errcnt)
1792                 IWL_DEBUG_INFO(priv,
1793                     "ucode image in INSTRUCTION memory is good\n");
1794
1795         return ret;
1796 }
1797
1798 /**
1799  * iwl_verify_ucode - determine which instruction image is in SRAM,
1800  *    and verify its contents
1801  */
1802 int iwl_verify_ucode(struct iwl_priv *priv)
1803 {
1804         __le32 *image;
1805         u32 len;
1806         int ret;
1807
1808         /* Try bootstrap */
1809         image = (__le32 *)priv->ucode_boot.v_addr;
1810         len = priv->ucode_boot.len;
1811         ret = iwlcore_verify_inst_sparse(priv, image, len);
1812         if (!ret) {
1813                 IWL_DEBUG_INFO(priv, "Bootstrap uCode is good in inst SRAM\n");
1814                 return 0;
1815         }
1816
1817         /* Try initialize */
1818         image = (__le32 *)priv->ucode_init.v_addr;
1819         len = priv->ucode_init.len;
1820         ret = iwlcore_verify_inst_sparse(priv, image, len);
1821         if (!ret) {
1822                 IWL_DEBUG_INFO(priv, "Initialize uCode is good in inst SRAM\n");
1823                 return 0;
1824         }
1825
1826         /* Try runtime/protocol */
1827         image = (__le32 *)priv->ucode_code.v_addr;
1828         len = priv->ucode_code.len;
1829         ret = iwlcore_verify_inst_sparse(priv, image, len);
1830         if (!ret) {
1831                 IWL_DEBUG_INFO(priv, "Runtime uCode is good in inst SRAM\n");
1832                 return 0;
1833         }
1834
1835         IWL_ERR(priv, "NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
1836
1837         /* Since nothing seems to match, show first several data entries in
1838          * instruction SRAM, so maybe visual inspection will give a clue.
1839          * Selection of bootstrap image (vs. other images) is arbitrary. */
1840         image = (__le32 *)priv->ucode_boot.v_addr;
1841         len = priv->ucode_boot.len;
1842         ret = iwl_verify_inst_full(priv, image, len);
1843
1844         return ret;
1845 }
1846 EXPORT_SYMBOL(iwl_verify_ucode);
1847
1848
1849 void iwl_rf_kill_ct_config(struct iwl_priv *priv)
1850 {
1851         struct iwl_ct_kill_config cmd;
1852         struct iwl_ct_kill_throttling_config adv_cmd;
1853         unsigned long flags;
1854         int ret = 0;
1855
1856         spin_lock_irqsave(&priv->lock, flags);
1857         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
1858                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
1859         spin_unlock_irqrestore(&priv->lock, flags);
1860         priv->thermal_throttle.ct_kill_toggle = false;
1861
1862         if (priv->cfg->support_ct_kill_exit) {
1863                 adv_cmd.critical_temperature_enter =
1864                         cpu_to_le32(priv->hw_params.ct_kill_threshold);
1865                 adv_cmd.critical_temperature_exit =
1866                         cpu_to_le32(priv->hw_params.ct_kill_exit_threshold);
1867
1868                 ret = iwl_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD,
1869                                        sizeof(adv_cmd), &adv_cmd);
1870                 if (ret)
1871                         IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
1872                 else
1873                         IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
1874                                         "succeeded, "
1875                                         "critical temperature enter is %d,"
1876                                         "exit is %d\n",
1877                                        priv->hw_params.ct_kill_threshold,
1878                                        priv->hw_params.ct_kill_exit_threshold);
1879         } else {
1880                 cmd.critical_temperature_R =
1881                         cpu_to_le32(priv->hw_params.ct_kill_threshold);
1882
1883                 ret = iwl_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD,
1884                                        sizeof(cmd), &cmd);
1885                 if (ret)
1886                         IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
1887                 else
1888                         IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
1889                                         "succeeded, "
1890                                         "critical temperature is %d\n",
1891                                         priv->hw_params.ct_kill_threshold);
1892         }
1893 }
1894 EXPORT_SYMBOL(iwl_rf_kill_ct_config);
1895
1896
1897 /*
1898  * CARD_STATE_CMD
1899  *
1900  * Use: Sets the device's internal card state to enable, disable, or halt
1901  *
1902  * When in the 'enable' state the card operates as normal.
1903  * When in the 'disable' state, the card enters into a low power mode.
1904  * When in the 'halt' state, the card is shut down and must be fully
1905  * restarted to come back on.
1906  */
1907 int iwl_send_card_state(struct iwl_priv *priv, u32 flags, u8 meta_flag)
1908 {
1909         struct iwl_host_cmd cmd = {
1910                 .id = REPLY_CARD_STATE_CMD,
1911                 .len = sizeof(u32),
1912                 .data = &flags,
1913                 .flags = meta_flag,
1914         };
1915
1916         return iwl_send_cmd(priv, &cmd);
1917 }
1918
1919 void iwl_rx_pm_sleep_notif(struct iwl_priv *priv,
1920                            struct iwl_rx_mem_buffer *rxb)
1921 {
1922 #ifdef CONFIG_IWLWIFI_DEBUG
1923         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1924         struct iwl_sleep_notification *sleep = &(pkt->u.sleep_notif);
1925         IWL_DEBUG_RX(priv, "sleep mode: %d, src: %d\n",
1926                      sleep->pm_sleep_mode, sleep->pm_wakeup_src);
1927 #endif
1928 }
1929 EXPORT_SYMBOL(iwl_rx_pm_sleep_notif);
1930
1931 void iwl_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
1932                                       struct iwl_rx_mem_buffer *rxb)
1933 {
1934         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1935         u32 len = le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
1936         IWL_DEBUG_RADIO(priv, "Dumping %d bytes of unhandled "
1937                         "notification for %s:\n", len,
1938                         get_cmd_string(pkt->hdr.cmd));
1939         iwl_print_hex_dump(priv, IWL_DL_RADIO, pkt->u.raw, len);
1940 }
1941 EXPORT_SYMBOL(iwl_rx_pm_debug_statistics_notif);
1942
1943 void iwl_rx_reply_error(struct iwl_priv *priv,
1944                         struct iwl_rx_mem_buffer *rxb)
1945 {
1946         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1947
1948         IWL_ERR(priv, "Error Reply type 0x%08X cmd %s (0x%02X) "
1949                 "seq 0x%04X ser 0x%08X\n",
1950                 le32_to_cpu(pkt->u.err_resp.error_type),
1951                 get_cmd_string(pkt->u.err_resp.cmd_id),
1952                 pkt->u.err_resp.cmd_id,
1953                 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
1954                 le32_to_cpu(pkt->u.err_resp.error_info));
1955 }
1956 EXPORT_SYMBOL(iwl_rx_reply_error);
1957
1958 void iwl_clear_isr_stats(struct iwl_priv *priv)
1959 {
1960         memset(&priv->isr_stats, 0, sizeof(priv->isr_stats));
1961 }
1962
1963 int iwl_mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
1964                            const struct ieee80211_tx_queue_params *params)
1965 {
1966         struct iwl_priv *priv = hw->priv;
1967         unsigned long flags;
1968         int q;
1969
1970         IWL_DEBUG_MAC80211(priv, "enter\n");
1971
1972         if (!iwl_is_ready_rf(priv)) {
1973                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1974                 return -EIO;
1975         }
1976
1977         if (queue >= AC_NUM) {
1978                 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1979                 return 0;
1980         }
1981
1982         q = AC_NUM - 1 - queue;
1983
1984         spin_lock_irqsave(&priv->lock, flags);
1985
1986         priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
1987         priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
1988         priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1989         priv->qos_data.def_qos_parm.ac[q].edca_txop =
1990                         cpu_to_le16((params->txop * 32));
1991
1992         priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1993         priv->qos_data.qos_active = 1;
1994
1995         if (priv->iw_mode == NL80211_IFTYPE_AP)
1996                 iwl_activate_qos(priv, 1);
1997         else if (priv->assoc_id && iwl_is_associated(priv))
1998                 iwl_activate_qos(priv, 0);
1999
2000         spin_unlock_irqrestore(&priv->lock, flags);
2001
2002         IWL_DEBUG_MAC80211(priv, "leave\n");
2003         return 0;
2004 }
2005 EXPORT_SYMBOL(iwl_mac_conf_tx);
2006
2007 static void iwl_ht_conf(struct iwl_priv *priv,
2008                         struct ieee80211_bss_conf *bss_conf)
2009 {
2010         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
2011         struct ieee80211_sta *sta;
2012
2013         IWL_DEBUG_MAC80211(priv, "enter: \n");
2014
2015         if (!ht_conf->is_ht)
2016                 return;
2017
2018         ht_conf->ht_protection =
2019                 bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_PROTECTION;
2020         ht_conf->non_GF_STA_present =
2021                 !!(bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
2022
2023         ht_conf->single_chain_sufficient = false;
2024
2025         switch (priv->iw_mode) {
2026         case NL80211_IFTYPE_STATION:
2027                 rcu_read_lock();
2028                 sta = ieee80211_find_sta(priv->vif, priv->bssid);
2029                 if (sta) {
2030                         struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
2031                         int maxstreams;
2032
2033                         maxstreams = (ht_cap->mcs.tx_params &
2034                                       IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK)
2035                                         >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
2036                         maxstreams += 1;
2037
2038                         if ((ht_cap->mcs.rx_mask[1] == 0) &&
2039                             (ht_cap->mcs.rx_mask[2] == 0))
2040                                 ht_conf->single_chain_sufficient = true;
2041                         if (maxstreams <= 1)
2042                                 ht_conf->single_chain_sufficient = true;
2043                 } else {
2044                         /*
2045                          * If at all, this can only happen through a race
2046                          * when the AP disconnects us while we're still
2047                          * setting up the connection, in that case mac80211
2048                          * will soon tell us about that.
2049                          */
2050                         ht_conf->single_chain_sufficient = true;
2051                 }
2052                 rcu_read_unlock();
2053                 break;
2054         case NL80211_IFTYPE_ADHOC:
2055                 ht_conf->single_chain_sufficient = true;
2056                 break;
2057         default:
2058                 break;
2059         }
2060
2061         IWL_DEBUG_MAC80211(priv, "leave\n");
2062 }
2063
2064 static inline void iwl_set_no_assoc(struct iwl_priv *priv)
2065 {
2066         priv->assoc_id = 0;
2067         iwl_led_disassociate(priv);
2068         /*
2069          * inform the ucode that there is no longer an
2070          * association and that no more packets should be
2071          * sent
2072          */
2073         priv->staging_rxon.filter_flags &=
2074                 ~RXON_FILTER_ASSOC_MSK;
2075         priv->staging_rxon.assoc_id = 0;
2076         iwlcore_commit_rxon(priv);
2077 }
2078
2079 #define IWL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6)
2080 void iwl_bss_info_changed(struct ieee80211_hw *hw,
2081                           struct ieee80211_vif *vif,
2082                           struct ieee80211_bss_conf *bss_conf,
2083                           u32 changes)
2084 {
2085         struct iwl_priv *priv = hw->priv;
2086         int ret;
2087
2088         IWL_DEBUG_MAC80211(priv, "changes = 0x%X\n", changes);
2089
2090         if (!iwl_is_alive(priv))
2091                 return;
2092
2093         mutex_lock(&priv->mutex);
2094
2095         if (changes & BSS_CHANGED_BEACON &&
2096             priv->iw_mode == NL80211_IFTYPE_AP) {
2097                 dev_kfree_skb(priv->ibss_beacon);
2098                 priv->ibss_beacon = ieee80211_beacon_get(hw, vif);
2099         }
2100
2101         if (changes & BSS_CHANGED_BEACON_INT) {
2102                 priv->beacon_int = bss_conf->beacon_int;
2103                 /* TODO: in AP mode, do something to make this take effect */
2104         }
2105
2106         if (changes & BSS_CHANGED_BSSID) {
2107                 IWL_DEBUG_MAC80211(priv, "BSSID %pM\n", bss_conf->bssid);
2108
2109                 /*
2110                  * If there is currently a HW scan going on in the
2111                  * background then we need to cancel it else the RXON
2112                  * below/in post_associate will fail.
2113                  */
2114                 if (iwl_scan_cancel_timeout(priv, 100)) {
2115                         IWL_WARN(priv, "Aborted scan still in progress after 100ms\n");
2116                         IWL_DEBUG_MAC80211(priv, "leaving - scan abort failed.\n");
2117                         mutex_unlock(&priv->mutex);
2118                         return;
2119                 }
2120
2121                 /* mac80211 only sets assoc when in STATION mode */
2122                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC ||
2123                     bss_conf->assoc) {
2124                         memcpy(priv->staging_rxon.bssid_addr,
2125                                bss_conf->bssid, ETH_ALEN);
2126
2127                         /* currently needed in a few places */
2128                         memcpy(priv->bssid, bss_conf->bssid, ETH_ALEN);
2129                 } else {
2130                         priv->staging_rxon.filter_flags &=
2131                                 ~RXON_FILTER_ASSOC_MSK;
2132                 }
2133
2134         }
2135
2136         /*
2137          * This needs to be after setting the BSSID in case
2138          * mac80211 decides to do both changes at once because
2139          * it will invoke post_associate.
2140          */
2141         if (priv->iw_mode == NL80211_IFTYPE_ADHOC &&
2142             changes & BSS_CHANGED_BEACON) {
2143                 struct sk_buff *beacon = ieee80211_beacon_get(hw, vif);
2144
2145                 if (beacon)
2146                         iwl_mac_beacon_update(hw, beacon);
2147         }
2148
2149         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
2150                 IWL_DEBUG_MAC80211(priv, "ERP_PREAMBLE %d\n",
2151                                    bss_conf->use_short_preamble);
2152                 if (bss_conf->use_short_preamble)
2153                         priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2154                 else
2155                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2156         }
2157
2158         if (changes & BSS_CHANGED_ERP_CTS_PROT) {
2159                 IWL_DEBUG_MAC80211(priv, "ERP_CTS %d\n", bss_conf->use_cts_prot);
2160                 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
2161                         priv->staging_rxon.flags |= RXON_FLG_TGG_PROTECT_MSK;
2162                 else
2163                         priv->staging_rxon.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
2164         }
2165
2166         if (changes & BSS_CHANGED_BASIC_RATES) {
2167                 /* XXX use this information
2168                  *
2169                  * To do that, remove code from iwl_set_rate() and put something
2170                  * like this here:
2171                  *
2172                 if (A-band)
2173                         priv->staging_rxon.ofdm_basic_rates =
2174                                 bss_conf->basic_rates;
2175                 else
2176                         priv->staging_rxon.ofdm_basic_rates =
2177                                 bss_conf->basic_rates >> 4;
2178                         priv->staging_rxon.cck_basic_rates =
2179                                 bss_conf->basic_rates & 0xF;
2180                  */
2181         }
2182
2183         if (changes & BSS_CHANGED_HT) {
2184                 iwl_ht_conf(priv, bss_conf);
2185
2186                 if (priv->cfg->ops->hcmd->set_rxon_chain)
2187                         priv->cfg->ops->hcmd->set_rxon_chain(priv);
2188         }
2189
2190         if (changes & BSS_CHANGED_ASSOC) {
2191                 IWL_DEBUG_MAC80211(priv, "ASSOC %d\n", bss_conf->assoc);
2192                 if (bss_conf->assoc) {
2193                         priv->assoc_id = bss_conf->aid;
2194                         priv->beacon_int = bss_conf->beacon_int;
2195                         priv->timestamp = bss_conf->timestamp;
2196                         priv->assoc_capability = bss_conf->assoc_capability;
2197
2198                         iwl_led_associate(priv);
2199
2200                         /*
2201                          * We have just associated, don't start scan too early
2202                          * leave time for EAPOL exchange to complete.
2203                          *
2204                          * XXX: do this in mac80211
2205                          */
2206                         priv->next_scan_jiffies = jiffies +
2207                                         IWL_DELAY_NEXT_SCAN_AFTER_ASSOC;
2208                         if (!iwl_is_rfkill(priv))
2209                                 priv->cfg->ops->lib->post_associate(priv);
2210                 } else
2211                         iwl_set_no_assoc(priv);
2212         }
2213
2214         if (changes && iwl_is_associated(priv) && priv->assoc_id) {
2215                 IWL_DEBUG_MAC80211(priv, "Changes (%#x) while associated\n",
2216                                    changes);
2217                 ret = iwl_send_rxon_assoc(priv);
2218                 if (!ret) {
2219                         /* Sync active_rxon with latest change. */
2220                         memcpy((void *)&priv->active_rxon,
2221                                 &priv->staging_rxon,
2222                                 sizeof(struct iwl_rxon_cmd));
2223                 }
2224         }
2225
2226         if (changes & BSS_CHANGED_BEACON_ENABLED) {
2227                 if (vif->bss_conf.enable_beacon) {
2228                         memcpy(priv->staging_rxon.bssid_addr,
2229                                bss_conf->bssid, ETH_ALEN);
2230                         memcpy(priv->bssid, bss_conf->bssid, ETH_ALEN);
2231                         iwlcore_config_ap(priv);
2232                 } else
2233                         iwl_set_no_assoc(priv);
2234         }
2235
2236         mutex_unlock(&priv->mutex);
2237
2238         IWL_DEBUG_MAC80211(priv, "leave\n");
2239 }
2240 EXPORT_SYMBOL(iwl_bss_info_changed);
2241
2242 int iwl_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb)
2243 {
2244         struct iwl_priv *priv = hw->priv;
2245         unsigned long flags;
2246         __le64 timestamp;
2247
2248         IWL_DEBUG_MAC80211(priv, "enter\n");
2249
2250         if (!iwl_is_ready_rf(priv)) {
2251                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
2252                 return -EIO;
2253         }
2254
2255         spin_lock_irqsave(&priv->lock, flags);
2256
2257         if (priv->ibss_beacon)
2258                 dev_kfree_skb(priv->ibss_beacon);
2259
2260         priv->ibss_beacon = skb;
2261
2262         priv->assoc_id = 0;
2263         timestamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
2264         priv->timestamp = le64_to_cpu(timestamp);
2265
2266         IWL_DEBUG_MAC80211(priv, "leave\n");
2267         spin_unlock_irqrestore(&priv->lock, flags);
2268
2269         iwl_reset_qos(priv);
2270
2271         priv->cfg->ops->lib->post_associate(priv);
2272
2273
2274         return 0;
2275 }
2276 EXPORT_SYMBOL(iwl_mac_beacon_update);
2277
2278 int iwl_set_mode(struct iwl_priv *priv, int mode)
2279 {
2280         if (mode == NL80211_IFTYPE_ADHOC) {
2281                 const struct iwl_channel_info *ch_info;
2282
2283                 ch_info = iwl_get_channel_info(priv,
2284                         priv->band,
2285                         le16_to_cpu(priv->staging_rxon.channel));
2286
2287                 if (!ch_info || !is_channel_ibss(ch_info)) {
2288                         IWL_ERR(priv, "channel %d not IBSS channel\n",
2289                                   le16_to_cpu(priv->staging_rxon.channel));
2290                         return -EINVAL;
2291                 }
2292         }
2293
2294         iwl_connection_init_rx_config(priv, mode);
2295
2296         if (priv->cfg->ops->hcmd->set_rxon_chain)
2297                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
2298
2299         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2300
2301         iwl_clear_stations_table(priv);
2302
2303         /* dont commit rxon if rf-kill is on*/
2304         if (!iwl_is_ready_rf(priv))
2305                 return -EAGAIN;
2306
2307         iwlcore_commit_rxon(priv);
2308
2309         return 0;
2310 }
2311 EXPORT_SYMBOL(iwl_set_mode);
2312
2313 int iwl_mac_add_interface(struct ieee80211_hw *hw,
2314                                  struct ieee80211_vif *vif)
2315 {
2316         struct iwl_priv *priv = hw->priv;
2317         int err = 0;
2318
2319         IWL_DEBUG_MAC80211(priv, "enter: type %d\n", vif->type);
2320
2321         mutex_lock(&priv->mutex);
2322
2323         if (priv->vif) {
2324                 IWL_DEBUG_MAC80211(priv, "leave - vif != NULL\n");
2325                 err = -EOPNOTSUPP;
2326                 goto out;
2327         }
2328
2329         priv->vif = vif;
2330         priv->iw_mode = vif->type;
2331
2332         if (vif->addr) {
2333                 IWL_DEBUG_MAC80211(priv, "Set %pM\n", vif->addr);
2334                 memcpy(priv->mac_addr, vif->addr, ETH_ALEN);
2335         }
2336
2337         if (iwl_set_mode(priv, vif->type) == -EAGAIN)
2338                 /* we are not ready, will run again when ready */
2339                 set_bit(STATUS_MODE_PENDING, &priv->status);
2340
2341  out:
2342         mutex_unlock(&priv->mutex);
2343
2344         IWL_DEBUG_MAC80211(priv, "leave\n");
2345         return err;
2346 }
2347 EXPORT_SYMBOL(iwl_mac_add_interface);
2348
2349 void iwl_mac_remove_interface(struct ieee80211_hw *hw,
2350                                      struct ieee80211_vif *vif)
2351 {
2352         struct iwl_priv *priv = hw->priv;
2353
2354         IWL_DEBUG_MAC80211(priv, "enter\n");
2355
2356         mutex_lock(&priv->mutex);
2357
2358         if (iwl_is_ready_rf(priv)) {
2359                 iwl_scan_cancel_timeout(priv, 100);
2360                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2361                 iwlcore_commit_rxon(priv);
2362         }
2363         if (priv->vif == vif) {
2364                 priv->vif = NULL;
2365                 memset(priv->bssid, 0, ETH_ALEN);
2366         }
2367         mutex_unlock(&priv->mutex);
2368
2369         IWL_DEBUG_MAC80211(priv, "leave\n");
2370
2371 }
2372 EXPORT_SYMBOL(iwl_mac_remove_interface);
2373
2374 /**
2375  * iwl_mac_config - mac80211 config callback
2376  *
2377  * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
2378  * be set inappropriately and the driver currently sets the hardware up to
2379  * use it whenever needed.
2380  */
2381 int iwl_mac_config(struct ieee80211_hw *hw, u32 changed)
2382 {
2383         struct iwl_priv *priv = hw->priv;
2384         const struct iwl_channel_info *ch_info;
2385         struct ieee80211_conf *conf = &hw->conf;
2386         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
2387         unsigned long flags = 0;
2388         int ret = 0;
2389         u16 ch;
2390         int scan_active = 0;
2391
2392         mutex_lock(&priv->mutex);
2393
2394         IWL_DEBUG_MAC80211(priv, "enter to channel %d changed 0x%X\n",
2395                                         conf->channel->hw_value, changed);
2396
2397         if (unlikely(!priv->cfg->mod_params->disable_hw_scan &&
2398                         test_bit(STATUS_SCANNING, &priv->status))) {
2399                 scan_active = 1;
2400                 IWL_DEBUG_MAC80211(priv, "leave - scanning\n");
2401         }
2402
2403         if (changed & (IEEE80211_CONF_CHANGE_SMPS |
2404                        IEEE80211_CONF_CHANGE_CHANNEL)) {
2405                 /* mac80211 uses static for non-HT which is what we want */
2406                 priv->current_ht_config.smps = conf->smps_mode;
2407
2408                 /*
2409                  * Recalculate chain counts.
2410                  *
2411                  * If monitor mode is enabled then mac80211 will
2412                  * set up the SM PS mode to OFF if an HT channel is
2413                  * configured.
2414                  */
2415                 if (priv->cfg->ops->hcmd->set_rxon_chain)
2416                         priv->cfg->ops->hcmd->set_rxon_chain(priv);
2417         }
2418
2419         /* during scanning mac80211 will delay channel setting until
2420          * scan finish with changed = 0
2421          */
2422         if (!changed || (changed & IEEE80211_CONF_CHANGE_CHANNEL)) {
2423                 if (scan_active)
2424                         goto set_ch_out;
2425
2426                 ch = ieee80211_frequency_to_channel(conf->channel->center_freq);
2427                 ch_info = iwl_get_channel_info(priv, conf->channel->band, ch);
2428                 if (!is_channel_valid(ch_info)) {
2429                         IWL_DEBUG_MAC80211(priv, "leave - invalid channel\n");
2430                         ret = -EINVAL;
2431                         goto set_ch_out;
2432                 }
2433
2434                 spin_lock_irqsave(&priv->lock, flags);
2435
2436                 /* Configure HT40 channels */
2437                 ht_conf->is_ht = conf_is_ht(conf);
2438                 if (ht_conf->is_ht) {
2439                         if (conf_is_ht40_minus(conf)) {
2440                                 ht_conf->extension_chan_offset =
2441                                         IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2442                                 ht_conf->is_40mhz = true;
2443                         } else if (conf_is_ht40_plus(conf)) {
2444                                 ht_conf->extension_chan_offset =
2445                                         IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2446                                 ht_conf->is_40mhz = true;
2447                         } else {
2448                                 ht_conf->extension_chan_offset =
2449                                         IEEE80211_HT_PARAM_CHA_SEC_NONE;
2450                                 ht_conf->is_40mhz = false;
2451                         }
2452                 } else
2453                         ht_conf->is_40mhz = false;
2454                 /* Default to no protection. Protection mode will later be set
2455                  * from BSS config in iwl_ht_conf */
2456                 ht_conf->ht_protection = IEEE80211_HT_OP_MODE_PROTECTION_NONE;
2457
2458                 /* if we are switching from ht to 2.4 clear flags
2459                  * from any ht related info since 2.4 does not
2460                  * support ht */
2461                 if ((le16_to_cpu(priv->staging_rxon.channel) != ch))
2462                         priv->staging_rxon.flags = 0;
2463
2464                 iwl_set_rxon_channel(priv, conf->channel);
2465                 iwl_set_rxon_ht(priv, ht_conf);
2466
2467                 iwl_set_flags_for_band(priv, conf->channel->band);
2468                 spin_unlock_irqrestore(&priv->lock, flags);
2469                 if (iwl_is_associated(priv) &&
2470                     (le16_to_cpu(priv->active_rxon.channel) != ch) &&
2471                     priv->cfg->ops->lib->set_channel_switch) {
2472                         iwl_set_rate(priv);
2473                         /*
2474                          * at this point, staging_rxon has the
2475                          * configuration for channel switch
2476                          */
2477                         ret = priv->cfg->ops->lib->set_channel_switch(priv,
2478                                 ch);
2479                         if (!ret) {
2480                                 iwl_print_rx_config_cmd(priv);
2481                                 goto out;
2482                         }
2483                         priv->switch_rxon.switch_in_progress = false;
2484                 }
2485  set_ch_out:
2486                 /* The list of supported rates and rate mask can be different
2487                  * for each band; since the band may have changed, reset
2488                  * the rate mask to what mac80211 lists */
2489                 iwl_set_rate(priv);
2490         }
2491
2492         if (changed & (IEEE80211_CONF_CHANGE_PS |
2493                         IEEE80211_CONF_CHANGE_IDLE)) {
2494                 ret = iwl_power_update_mode(priv, false);
2495                 if (ret)
2496                         IWL_DEBUG_MAC80211(priv, "Error setting sleep level\n");
2497         }
2498
2499         if (changed & IEEE80211_CONF_CHANGE_POWER) {
2500                 IWL_DEBUG_MAC80211(priv, "TX Power old=%d new=%d\n",
2501                         priv->tx_power_user_lmt, conf->power_level);
2502
2503                 iwl_set_tx_power(priv, conf->power_level, false);
2504         }
2505
2506         if (!iwl_is_ready(priv)) {
2507                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2508                 goto out;
2509         }
2510
2511         if (scan_active)
2512                 goto out;
2513
2514         if (memcmp(&priv->active_rxon,
2515                    &priv->staging_rxon, sizeof(priv->staging_rxon)))
2516                 iwlcore_commit_rxon(priv);
2517         else
2518                 IWL_DEBUG_INFO(priv, "Not re-sending same RXON configuration.\n");
2519
2520
2521 out:
2522         IWL_DEBUG_MAC80211(priv, "leave\n");
2523         mutex_unlock(&priv->mutex);
2524         return ret;
2525 }
2526 EXPORT_SYMBOL(iwl_mac_config);
2527
2528 void iwl_mac_reset_tsf(struct ieee80211_hw *hw)
2529 {
2530         struct iwl_priv *priv = hw->priv;
2531         unsigned long flags;
2532
2533         mutex_lock(&priv->mutex);
2534         IWL_DEBUG_MAC80211(priv, "enter\n");
2535
2536         spin_lock_irqsave(&priv->lock, flags);
2537         memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_config));
2538         spin_unlock_irqrestore(&priv->lock, flags);
2539
2540         iwl_reset_qos(priv);
2541
2542         spin_lock_irqsave(&priv->lock, flags);
2543         priv->assoc_id = 0;
2544         priv->assoc_capability = 0;
2545         priv->assoc_station_added = 0;
2546
2547         /* new association get rid of ibss beacon skb */
2548         if (priv->ibss_beacon)
2549                 dev_kfree_skb(priv->ibss_beacon);
2550
2551         priv->ibss_beacon = NULL;
2552
2553         priv->beacon_int = priv->vif->bss_conf.beacon_int;
2554         priv->timestamp = 0;
2555
2556         spin_unlock_irqrestore(&priv->lock, flags);
2557
2558         if (!iwl_is_ready_rf(priv)) {
2559                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2560                 mutex_unlock(&priv->mutex);
2561                 return;
2562         }
2563
2564         /* we are restarting association process
2565          * clear RXON_FILTER_ASSOC_MSK bit
2566          */
2567         iwl_scan_cancel_timeout(priv, 100);
2568         priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2569         iwlcore_commit_rxon(priv);
2570
2571         iwl_set_rate(priv);
2572
2573         mutex_unlock(&priv->mutex);
2574
2575         IWL_DEBUG_MAC80211(priv, "leave\n");
2576 }
2577 EXPORT_SYMBOL(iwl_mac_reset_tsf);
2578
2579 int iwl_alloc_txq_mem(struct iwl_priv *priv)
2580 {
2581         if (!priv->txq)
2582                 priv->txq = kzalloc(
2583                         sizeof(struct iwl_tx_queue) * priv->cfg->num_of_queues,
2584                         GFP_KERNEL);
2585         if (!priv->txq) {
2586                 IWL_ERR(priv, "Not enough memory for txq \n");
2587                 return -ENOMEM;
2588         }
2589         return 0;
2590 }
2591 EXPORT_SYMBOL(iwl_alloc_txq_mem);
2592
2593 void iwl_free_txq_mem(struct iwl_priv *priv)
2594 {
2595         kfree(priv->txq);
2596         priv->txq = NULL;
2597 }
2598 EXPORT_SYMBOL(iwl_free_txq_mem);
2599
2600 int iwl_send_wimax_coex(struct iwl_priv *priv)
2601 {
2602         struct iwl_wimax_coex_cmd uninitialized_var(coex_cmd);
2603
2604         if (priv->cfg->support_wimax_coexist) {
2605                 /* UnMask wake up src at associated sleep */
2606                 coex_cmd.flags |= COEX_FLAGS_ASSOC_WA_UNMASK_MSK;
2607
2608                 /* UnMask wake up src at unassociated sleep */
2609                 coex_cmd.flags |= COEX_FLAGS_UNASSOC_WA_UNMASK_MSK;
2610                 memcpy(coex_cmd.sta_prio, cu_priorities,
2611                         sizeof(struct iwl_wimax_coex_event_entry) *
2612                          COEX_NUM_OF_EVENTS);
2613
2614                 /* enabling the coexistence feature */
2615                 coex_cmd.flags |= COEX_FLAGS_COEX_ENABLE_MSK;
2616
2617                 /* enabling the priorities tables */
2618                 coex_cmd.flags |= COEX_FLAGS_STA_TABLE_VALID_MSK;
2619         } else {
2620                 /* coexistence is disabled */
2621                 memset(&coex_cmd, 0, sizeof(coex_cmd));
2622         }
2623         return iwl_send_cmd_pdu(priv, COEX_PRIORITY_TABLE_CMD,
2624                                 sizeof(coex_cmd), &coex_cmd);
2625 }
2626 EXPORT_SYMBOL(iwl_send_wimax_coex);
2627
2628 #ifdef CONFIG_IWLWIFI_DEBUGFS
2629
2630 #define IWL_TRAFFIC_DUMP_SIZE   (IWL_TRAFFIC_ENTRY_SIZE * IWL_TRAFFIC_ENTRIES)
2631
2632 void iwl_reset_traffic_log(struct iwl_priv *priv)
2633 {
2634         priv->tx_traffic_idx = 0;
2635         priv->rx_traffic_idx = 0;
2636         if (priv->tx_traffic)
2637                 memset(priv->tx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
2638         if (priv->rx_traffic)
2639                 memset(priv->rx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
2640 }
2641
2642 int iwl_alloc_traffic_mem(struct iwl_priv *priv)
2643 {
2644         u32 traffic_size = IWL_TRAFFIC_DUMP_SIZE;
2645
2646         if (iwl_debug_level & IWL_DL_TX) {
2647                 if (!priv->tx_traffic) {
2648                         priv->tx_traffic =
2649                                 kzalloc(traffic_size, GFP_KERNEL);
2650                         if (!priv->tx_traffic)
2651                                 return -ENOMEM;
2652                 }
2653         }
2654         if (iwl_debug_level & IWL_DL_RX) {
2655                 if (!priv->rx_traffic) {
2656                         priv->rx_traffic =
2657                                 kzalloc(traffic_size, GFP_KERNEL);
2658                         if (!priv->rx_traffic)
2659                                 return -ENOMEM;
2660                 }
2661         }
2662         iwl_reset_traffic_log(priv);
2663         return 0;
2664 }
2665 EXPORT_SYMBOL(iwl_alloc_traffic_mem);
2666
2667 void iwl_free_traffic_mem(struct iwl_priv *priv)
2668 {
2669         kfree(priv->tx_traffic);
2670         priv->tx_traffic = NULL;
2671
2672         kfree(priv->rx_traffic);
2673         priv->rx_traffic = NULL;
2674 }
2675 EXPORT_SYMBOL(iwl_free_traffic_mem);
2676
2677 void iwl_dbg_log_tx_data_frame(struct iwl_priv *priv,
2678                       u16 length, struct ieee80211_hdr *header)
2679 {
2680         __le16 fc;
2681         u16 len;
2682
2683         if (likely(!(iwl_debug_level & IWL_DL_TX)))
2684                 return;
2685
2686         if (!priv->tx_traffic)
2687                 return;
2688
2689         fc = header->frame_control;
2690         if (ieee80211_is_data(fc)) {
2691                 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
2692                        ? IWL_TRAFFIC_ENTRY_SIZE : length;
2693                 memcpy((priv->tx_traffic +
2694                        (priv->tx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
2695                        header, len);
2696                 priv->tx_traffic_idx =
2697                         (priv->tx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
2698         }
2699 }
2700 EXPORT_SYMBOL(iwl_dbg_log_tx_data_frame);
2701
2702 void iwl_dbg_log_rx_data_frame(struct iwl_priv *priv,
2703                       u16 length, struct ieee80211_hdr *header)
2704 {
2705         __le16 fc;
2706         u16 len;
2707
2708         if (likely(!(iwl_debug_level & IWL_DL_RX)))
2709                 return;
2710
2711         if (!priv->rx_traffic)
2712                 return;
2713
2714         fc = header->frame_control;
2715         if (ieee80211_is_data(fc)) {
2716                 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
2717                        ? IWL_TRAFFIC_ENTRY_SIZE : length;
2718                 memcpy((priv->rx_traffic +
2719                        (priv->rx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
2720                        header, len);
2721                 priv->rx_traffic_idx =
2722                         (priv->rx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
2723         }
2724 }
2725 EXPORT_SYMBOL(iwl_dbg_log_rx_data_frame);
2726
2727 const char *get_mgmt_string(int cmd)
2728 {
2729         switch (cmd) {
2730                 IWL_CMD(MANAGEMENT_ASSOC_REQ);
2731                 IWL_CMD(MANAGEMENT_ASSOC_RESP);
2732                 IWL_CMD(MANAGEMENT_REASSOC_REQ);
2733                 IWL_CMD(MANAGEMENT_REASSOC_RESP);
2734                 IWL_CMD(MANAGEMENT_PROBE_REQ);
2735                 IWL_CMD(MANAGEMENT_PROBE_RESP);
2736                 IWL_CMD(MANAGEMENT_BEACON);
2737                 IWL_CMD(MANAGEMENT_ATIM);
2738                 IWL_CMD(MANAGEMENT_DISASSOC);
2739                 IWL_CMD(MANAGEMENT_AUTH);
2740                 IWL_CMD(MANAGEMENT_DEAUTH);
2741                 IWL_CMD(MANAGEMENT_ACTION);
2742         default:
2743                 return "UNKNOWN";
2744
2745         }
2746 }
2747
2748 const char *get_ctrl_string(int cmd)
2749 {
2750         switch (cmd) {
2751                 IWL_CMD(CONTROL_BACK_REQ);
2752                 IWL_CMD(CONTROL_BACK);
2753                 IWL_CMD(CONTROL_PSPOLL);
2754                 IWL_CMD(CONTROL_RTS);
2755                 IWL_CMD(CONTROL_CTS);
2756                 IWL_CMD(CONTROL_ACK);
2757                 IWL_CMD(CONTROL_CFEND);
2758                 IWL_CMD(CONTROL_CFENDACK);
2759         default:
2760                 return "UNKNOWN";
2761
2762         }
2763 }
2764
2765 void iwl_clear_traffic_stats(struct iwl_priv *priv)
2766 {
2767         memset(&priv->tx_stats, 0, sizeof(struct traffic_stats));
2768         memset(&priv->rx_stats, 0, sizeof(struct traffic_stats));
2769         priv->led_tpt = 0;
2770 }
2771
2772 /*
2773  * if CONFIG_IWLWIFI_DEBUGFS defined, iwl_update_stats function will
2774  * record all the MGMT, CTRL and DATA pkt for both TX and Rx pass.
2775  * Use debugFs to display the rx/rx_statistics
2776  * if CONFIG_IWLWIFI_DEBUGFS not being defined, then no MGMT and CTRL
2777  * information will be recorded, but DATA pkt still will be recorded
2778  * for the reason of iwl_led.c need to control the led blinking based on
2779  * number of tx and rx data.
2780  *
2781  */
2782 void iwl_update_stats(struct iwl_priv *priv, bool is_tx, __le16 fc, u16 len)
2783 {
2784         struct traffic_stats    *stats;
2785
2786         if (is_tx)
2787                 stats = &priv->tx_stats;
2788         else
2789                 stats = &priv->rx_stats;
2790
2791         if (ieee80211_is_mgmt(fc)) {
2792                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
2793                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
2794                         stats->mgmt[MANAGEMENT_ASSOC_REQ]++;
2795                         break;
2796                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP):
2797                         stats->mgmt[MANAGEMENT_ASSOC_RESP]++;
2798                         break;
2799                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
2800                         stats->mgmt[MANAGEMENT_REASSOC_REQ]++;
2801                         break;
2802                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP):
2803                         stats->mgmt[MANAGEMENT_REASSOC_RESP]++;
2804                         break;
2805                 case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ):
2806                         stats->mgmt[MANAGEMENT_PROBE_REQ]++;
2807                         break;
2808                 case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP):
2809                         stats->mgmt[MANAGEMENT_PROBE_RESP]++;
2810                         break;
2811                 case cpu_to_le16(IEEE80211_STYPE_BEACON):
2812                         stats->mgmt[MANAGEMENT_BEACON]++;
2813                         break;
2814                 case cpu_to_le16(IEEE80211_STYPE_ATIM):
2815                         stats->mgmt[MANAGEMENT_ATIM]++;
2816                         break;
2817                 case cpu_to_le16(IEEE80211_STYPE_DISASSOC):
2818                         stats->mgmt[MANAGEMENT_DISASSOC]++;
2819                         break;
2820                 case cpu_to_le16(IEEE80211_STYPE_AUTH):
2821                         stats->mgmt[MANAGEMENT_AUTH]++;
2822                         break;
2823                 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
2824                         stats->mgmt[MANAGEMENT_DEAUTH]++;
2825                         break;
2826                 case cpu_to_le16(IEEE80211_STYPE_ACTION):
2827                         stats->mgmt[MANAGEMENT_ACTION]++;
2828                         break;
2829                 }
2830         } else if (ieee80211_is_ctl(fc)) {
2831                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
2832                 case cpu_to_le16(IEEE80211_STYPE_BACK_REQ):
2833                         stats->ctrl[CONTROL_BACK_REQ]++;
2834                         break;
2835                 case cpu_to_le16(IEEE80211_STYPE_BACK):
2836                         stats->ctrl[CONTROL_BACK]++;
2837                         break;
2838                 case cpu_to_le16(IEEE80211_STYPE_PSPOLL):
2839                         stats->ctrl[CONTROL_PSPOLL]++;
2840                         break;
2841                 case cpu_to_le16(IEEE80211_STYPE_RTS):
2842                         stats->ctrl[CONTROL_RTS]++;
2843                         break;
2844                 case cpu_to_le16(IEEE80211_STYPE_CTS):
2845                         stats->ctrl[CONTROL_CTS]++;
2846                         break;
2847                 case cpu_to_le16(IEEE80211_STYPE_ACK):
2848                         stats->ctrl[CONTROL_ACK]++;
2849                         break;
2850                 case cpu_to_le16(IEEE80211_STYPE_CFEND):
2851                         stats->ctrl[CONTROL_CFEND]++;
2852                         break;
2853                 case cpu_to_le16(IEEE80211_STYPE_CFENDACK):
2854                         stats->ctrl[CONTROL_CFENDACK]++;
2855                         break;
2856                 }
2857         } else {
2858                 /* data */
2859                 stats->data_cnt++;
2860                 stats->data_bytes += len;
2861         }
2862         iwl_leds_background(priv);
2863 }
2864 EXPORT_SYMBOL(iwl_update_stats);
2865 #endif
2866
2867 const static char *get_csr_string(int cmd)
2868 {
2869         switch (cmd) {
2870                 IWL_CMD(CSR_HW_IF_CONFIG_REG);
2871                 IWL_CMD(CSR_INT_COALESCING);
2872                 IWL_CMD(CSR_INT);
2873                 IWL_CMD(CSR_INT_MASK);
2874                 IWL_CMD(CSR_FH_INT_STATUS);
2875                 IWL_CMD(CSR_GPIO_IN);
2876                 IWL_CMD(CSR_RESET);
2877                 IWL_CMD(CSR_GP_CNTRL);
2878                 IWL_CMD(CSR_HW_REV);
2879                 IWL_CMD(CSR_EEPROM_REG);
2880                 IWL_CMD(CSR_EEPROM_GP);
2881                 IWL_CMD(CSR_OTP_GP_REG);
2882                 IWL_CMD(CSR_GIO_REG);
2883                 IWL_CMD(CSR_GP_UCODE_REG);
2884                 IWL_CMD(CSR_GP_DRIVER_REG);
2885                 IWL_CMD(CSR_UCODE_DRV_GP1);
2886                 IWL_CMD(CSR_UCODE_DRV_GP2);
2887                 IWL_CMD(CSR_LED_REG);
2888                 IWL_CMD(CSR_DRAM_INT_TBL_REG);
2889                 IWL_CMD(CSR_GIO_CHICKEN_BITS);
2890                 IWL_CMD(CSR_ANA_PLL_CFG);
2891                 IWL_CMD(CSR_HW_REV_WA_REG);
2892                 IWL_CMD(CSR_DBG_HPET_MEM_REG);
2893         default:
2894                 return "UNKNOWN";
2895
2896         }
2897 }
2898
2899 void iwl_dump_csr(struct iwl_priv *priv)
2900 {
2901         int i;
2902         u32 csr_tbl[] = {
2903                 CSR_HW_IF_CONFIG_REG,
2904                 CSR_INT_COALESCING,
2905                 CSR_INT,
2906                 CSR_INT_MASK,
2907                 CSR_FH_INT_STATUS,
2908                 CSR_GPIO_IN,
2909                 CSR_RESET,
2910                 CSR_GP_CNTRL,
2911                 CSR_HW_REV,
2912                 CSR_EEPROM_REG,
2913                 CSR_EEPROM_GP,
2914                 CSR_OTP_GP_REG,
2915                 CSR_GIO_REG,
2916                 CSR_GP_UCODE_REG,
2917                 CSR_GP_DRIVER_REG,
2918                 CSR_UCODE_DRV_GP1,
2919                 CSR_UCODE_DRV_GP2,
2920                 CSR_LED_REG,
2921                 CSR_DRAM_INT_TBL_REG,
2922                 CSR_GIO_CHICKEN_BITS,
2923                 CSR_ANA_PLL_CFG,
2924                 CSR_HW_REV_WA_REG,
2925                 CSR_DBG_HPET_MEM_REG
2926         };
2927         IWL_ERR(priv, "CSR values:\n");
2928         IWL_ERR(priv, "(2nd byte of CSR_INT_COALESCING is "
2929                 "CSR_INT_PERIODIC_REG)\n");
2930         for (i = 0; i <  ARRAY_SIZE(csr_tbl); i++) {
2931                 IWL_ERR(priv, "  %25s: 0X%08x\n",
2932                         get_csr_string(csr_tbl[i]),
2933                         iwl_read32(priv, csr_tbl[i]));
2934         }
2935 }
2936 EXPORT_SYMBOL(iwl_dump_csr);
2937
2938 const static char *get_fh_string(int cmd)
2939 {
2940         switch (cmd) {
2941                 IWL_CMD(FH_RSCSR_CHNL0_STTS_WPTR_REG);
2942                 IWL_CMD(FH_RSCSR_CHNL0_RBDCB_BASE_REG);
2943                 IWL_CMD(FH_RSCSR_CHNL0_WPTR);
2944                 IWL_CMD(FH_MEM_RCSR_CHNL0_CONFIG_REG);
2945                 IWL_CMD(FH_MEM_RSSR_SHARED_CTRL_REG);
2946                 IWL_CMD(FH_MEM_RSSR_RX_STATUS_REG);
2947                 IWL_CMD(FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV);
2948                 IWL_CMD(FH_TSSR_TX_STATUS_REG);
2949                 IWL_CMD(FH_TSSR_TX_ERROR_REG);
2950         default:
2951                 return "UNKNOWN";
2952
2953         }
2954 }
2955
2956 int iwl_dump_fh(struct iwl_priv *priv, char **buf, bool display)
2957 {
2958         int i;
2959 #ifdef CONFIG_IWLWIFI_DEBUG
2960         int pos = 0;
2961         size_t bufsz = 0;
2962 #endif
2963         u32 fh_tbl[] = {
2964                 FH_RSCSR_CHNL0_STTS_WPTR_REG,
2965                 FH_RSCSR_CHNL0_RBDCB_BASE_REG,
2966                 FH_RSCSR_CHNL0_WPTR,
2967                 FH_MEM_RCSR_CHNL0_CONFIG_REG,
2968                 FH_MEM_RSSR_SHARED_CTRL_REG,
2969                 FH_MEM_RSSR_RX_STATUS_REG,
2970                 FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV,
2971                 FH_TSSR_TX_STATUS_REG,
2972                 FH_TSSR_TX_ERROR_REG
2973         };
2974 #ifdef CONFIG_IWLWIFI_DEBUG
2975         if (display) {
2976                 bufsz = ARRAY_SIZE(fh_tbl) * 48 + 40;
2977                 *buf = kmalloc(bufsz, GFP_KERNEL);
2978                 if (!*buf)
2979                         return -ENOMEM;
2980                 pos += scnprintf(*buf + pos, bufsz - pos,
2981                                 "FH register values:\n");
2982                 for (i = 0; i < ARRAY_SIZE(fh_tbl); i++) {
2983                         pos += scnprintf(*buf + pos, bufsz - pos,
2984                                 "  %34s: 0X%08x\n",
2985                                 get_fh_string(fh_tbl[i]),
2986                                 iwl_read_direct32(priv, fh_tbl[i]));
2987                 }
2988                 return pos;
2989         }
2990 #endif
2991         IWL_ERR(priv, "FH register values:\n");
2992         for (i = 0; i <  ARRAY_SIZE(fh_tbl); i++) {
2993                 IWL_ERR(priv, "  %34s: 0X%08x\n",
2994                         get_fh_string(fh_tbl[i]),
2995                         iwl_read_direct32(priv, fh_tbl[i]));
2996         }
2997         return 0;
2998 }
2999 EXPORT_SYMBOL(iwl_dump_fh);
3000
3001 static void iwl_force_rf_reset(struct iwl_priv *priv)
3002 {
3003         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3004                 return;
3005
3006         if (!iwl_is_associated(priv)) {
3007                 IWL_DEBUG_SCAN(priv, "force reset rejected: not associated\n");
3008                 return;
3009         }
3010         /*
3011          * There is no easy and better way to force reset the radio,
3012          * the only known method is switching channel which will force to
3013          * reset and tune the radio.
3014          * Use internal short scan (single channel) operation to should
3015          * achieve this objective.
3016          * Driver should reset the radio when number of consecutive missed
3017          * beacon, or any other uCode error condition detected.
3018          */
3019         IWL_DEBUG_INFO(priv, "perform radio reset.\n");
3020         iwl_internal_short_hw_scan(priv);
3021         return;
3022 }
3023
3024
3025 int iwl_force_reset(struct iwl_priv *priv, int mode)
3026 {
3027         struct iwl_force_reset *force_reset;
3028
3029         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
3030                 return -EINVAL;
3031
3032         if (mode >= IWL_MAX_FORCE_RESET) {
3033                 IWL_DEBUG_INFO(priv, "invalid reset request.\n");
3034                 return -EINVAL;
3035         }
3036         force_reset = &priv->force_reset[mode];
3037         force_reset->reset_request_count++;
3038         if (force_reset->last_force_reset_jiffies &&
3039             time_after(force_reset->last_force_reset_jiffies +
3040             force_reset->reset_duration, jiffies)) {
3041                 IWL_DEBUG_INFO(priv, "force reset rejected\n");
3042                 force_reset->reset_reject_count++;
3043                 return -EAGAIN;
3044         }
3045         force_reset->reset_success_count++;
3046         force_reset->last_force_reset_jiffies = jiffies;
3047         IWL_DEBUG_INFO(priv, "perform force reset (%d)\n", mode);
3048         switch (mode) {
3049         case IWL_RF_RESET:
3050                 iwl_force_rf_reset(priv);
3051                 break;
3052         case IWL_FW_RESET:
3053                 IWL_ERR(priv, "On demand firmware reload\n");
3054                 /* Set the FW error flag -- cleared on iwl_down */
3055                 set_bit(STATUS_FW_ERROR, &priv->status);
3056                 wake_up_interruptible(&priv->wait_command_queue);
3057                 /*
3058                  * Keep the restart process from trying to send host
3059                  * commands by clearing the INIT status bit
3060                  */
3061                 clear_bit(STATUS_READY, &priv->status);
3062                 queue_work(priv->workqueue, &priv->restart);
3063                 break;
3064         }
3065         return 0;
3066 }
3067
3068 #ifdef CONFIG_PM
3069
3070 int iwl_pci_suspend(struct pci_dev *pdev, pm_message_t state)
3071 {
3072         struct iwl_priv *priv = pci_get_drvdata(pdev);
3073
3074         /*
3075          * This function is called when system goes into suspend state
3076          * mac80211 will call iwl_mac_stop() from the mac80211 suspend function
3077          * first but since iwl_mac_stop() has no knowledge of who the caller is,
3078          * it will not call apm_ops.stop() to stop the DMA operation.
3079          * Calling apm_ops.stop here to make sure we stop the DMA.
3080          */
3081         priv->cfg->ops->lib->apm_ops.stop(priv);
3082
3083         pci_save_state(pdev);
3084         pci_disable_device(pdev);
3085         pci_set_power_state(pdev, PCI_D3hot);
3086
3087         return 0;
3088 }
3089 EXPORT_SYMBOL(iwl_pci_suspend);
3090
3091 int iwl_pci_resume(struct pci_dev *pdev)
3092 {
3093         struct iwl_priv *priv = pci_get_drvdata(pdev);
3094         int ret;
3095
3096         pci_set_power_state(pdev, PCI_D0);
3097         ret = pci_enable_device(pdev);
3098         if (ret)
3099                 return ret;
3100         pci_restore_state(pdev);
3101         iwl_enable_interrupts(priv);
3102
3103         return 0;
3104 }
3105 EXPORT_SYMBOL(iwl_pci_resume);
3106
3107 #endif /* CONFIG_PM */