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