drivers/net/wireless/iwlwifi/iwl-core.c

   1 /******************************************************************************
   2  *
   3  * GPL LICENSE SUMMARY
   4  *
   5  * Copyright(c) 2008 - 2009 Intel Corporation. All rights reserved.
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of version 2 of the GNU General Public License as
   9  * published by the Free Software Foundation.
  10  *
  11  * This program is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
  19  * USA
  20  *
  21  * The full GNU General Public License is included in this distribution
  22  * in the file called LICENSE.GPL.
  23  *
  24  * Contact Information:
  25  *  Intel Linux Wireless <ilw@linux.intel.com>
  26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27  *****************************************************************************/
  28
  29 #include <linux/kernel.h>
  30 #include <linux/module.h>
  31 #include <linux/etherdevice.h>
  32 #include <net/mac80211.h>
  33
  34 #include "iwl-eeprom.h"
  35 #include "iwl-dev.h" /* FIXME: remove */
  36 #include "iwl-debug.h"
  37 #include "iwl-core.h"
  38 #include "iwl-io.h"
  39 #include "iwl-power.h"
  40 #include "iwl-sta.h"
  41 #include "iwl-helpers.h"
  42
  43
  44 MODULE_DESCRIPTION("iwl core");
  45 MODULE_VERSION(IWLWIFI_VERSION);
  46 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
  47 MODULE_LICENSE("GPL");
  48
  49 static struct iwl_wimax_coex_event_entry cu_priorities[COEX_NUM_OF_EVENTS] = {
  50         {COEX_CU_UNASSOC_IDLE_RP, COEX_CU_UNASSOC_IDLE_WP,
  51          0, COEX_UNASSOC_IDLE_FLAGS},
  52         {COEX_CU_UNASSOC_MANUAL_SCAN_RP, COEX_CU_UNASSOC_MANUAL_SCAN_WP,
  53          0, COEX_UNASSOC_MANUAL_SCAN_FLAGS},
  54         {COEX_CU_UNASSOC_AUTO_SCAN_RP, COEX_CU_UNASSOC_AUTO_SCAN_WP,
  55          0, COEX_UNASSOC_AUTO_SCAN_FLAGS},
  56         {COEX_CU_CALIBRATION_RP, COEX_CU_CALIBRATION_WP,
  57          0, COEX_CALIBRATION_FLAGS},
  58         {COEX_CU_PERIODIC_CALIBRATION_RP, COEX_CU_PERIODIC_CALIBRATION_WP,
  59          0, COEX_PERIODIC_CALIBRATION_FLAGS},
  60         {COEX_CU_CONNECTION_ESTAB_RP, COEX_CU_CONNECTION_ESTAB_WP,
  61          0, COEX_CONNECTION_ESTAB_FLAGS},
  62         {COEX_CU_ASSOCIATED_IDLE_RP, COEX_CU_ASSOCIATED_IDLE_WP,
  63          0, COEX_ASSOCIATED_IDLE_FLAGS},
  64         {COEX_CU_ASSOC_MANUAL_SCAN_RP, COEX_CU_ASSOC_MANUAL_SCAN_WP,
  65          0, COEX_ASSOC_MANUAL_SCAN_FLAGS},
  66         {COEX_CU_ASSOC_AUTO_SCAN_RP, COEX_CU_ASSOC_AUTO_SCAN_WP,
  67          0, COEX_ASSOC_AUTO_SCAN_FLAGS},
  68         {COEX_CU_ASSOC_ACTIVE_LEVEL_RP, COEX_CU_ASSOC_ACTIVE_LEVEL_WP,
  69          0, COEX_ASSOC_ACTIVE_LEVEL_FLAGS},
  70         {COEX_CU_RF_ON_RP, COEX_CU_RF_ON_WP, 0, COEX_CU_RF_ON_FLAGS},
  71         {COEX_CU_RF_OFF_RP, COEX_CU_RF_OFF_WP, 0, COEX_RF_OFF_FLAGS},
  72         {COEX_CU_STAND_ALONE_DEBUG_RP, COEX_CU_STAND_ALONE_DEBUG_WP,
  73          0, COEX_STAND_ALONE_DEBUG_FLAGS},
  74         {COEX_CU_IPAN_ASSOC_LEVEL_RP, COEX_CU_IPAN_ASSOC_LEVEL_WP,
  75          0, COEX_IPAN_ASSOC_LEVEL_FLAGS},
  76         {COEX_CU_RSRVD1_RP, COEX_CU_RSRVD1_WP, 0, COEX_RSRVD1_FLAGS},
  77         {COEX_CU_RSRVD2_RP, COEX_CU_RSRVD2_WP, 0, COEX_RSRVD2_FLAGS}
  78 };
  79
  80 #define IWL_DECLARE_RATE_INFO(r, s, ip, in, rp, rn, pp, np)    \
  81         [IWL_RATE_##r##M_INDEX] = { IWL_RATE_##r##M_PLCP,      \
  82                                     IWL_RATE_SISO_##s##M_PLCP, \
  83                                     IWL_RATE_MIMO2_##s##M_PLCP,\
  84                                     IWL_RATE_MIMO3_##s##M_PLCP,\
  85                                     IWL_RATE_##r##M_IEEE,      \
  86                                     IWL_RATE_##ip##M_INDEX,    \
  87                                     IWL_RATE_##in##M_INDEX,    \
  88                                     IWL_RATE_##rp##M_INDEX,    \
  89                                     IWL_RATE_##rn##M_INDEX,    \
  90                                     IWL_RATE_##pp##M_INDEX,    \
  91                                     IWL_RATE_##np##M_INDEX }
  92
  93 u32 iwl_debug_level;
  94 EXPORT_SYMBOL(iwl_debug_level);
  95
  96 static irqreturn_t iwl_isr(int irq, void *data);
  97
  98 /*
  99  * Parameter order:
 100  *   rate, ht rate, prev rate, next rate, prev tgg rate, next tgg rate
 101  *
 102  * If there isn't a valid next or previous rate then INV is used which
 103  * maps to IWL_RATE_INVALID
 104  *
 105  */
 106 const struct iwl_rate_info iwl_rates[IWL_RATE_COUNT] = {
 107         IWL_DECLARE_RATE_INFO(1, INV, INV, 2, INV, 2, INV, 2),    /*  1mbps */
 108         IWL_DECLARE_RATE_INFO(2, INV, 1, 5, 1, 5, 1, 5),          /*  2mbps */
 109         IWL_DECLARE_RATE_INFO(5, INV, 2, 6, 2, 11, 2, 11),        /*5.5mbps */
 110         IWL_DECLARE_RATE_INFO(11, INV, 9, 12, 9, 12, 5, 18),      /* 11mbps */
 111         IWL_DECLARE_RATE_INFO(6, 6, 5, 9, 5, 11, 5, 11),        /*  6mbps */
 112         IWL_DECLARE_RATE_INFO(9, 6, 6, 11, 6, 11, 5, 11),       /*  9mbps */
 113         IWL_DECLARE_RATE_INFO(12, 12, 11, 18, 11, 18, 11, 18),   /* 12mbps */
 114         IWL_DECLARE_RATE_INFO(18, 18, 12, 24, 12, 24, 11, 24),   /* 18mbps */
 115         IWL_DECLARE_RATE_INFO(24, 24, 18, 36, 18, 36, 18, 36),   /* 24mbps */
 116         IWL_DECLARE_RATE_INFO(36, 36, 24, 48, 24, 48, 24, 48),   /* 36mbps */
 117         IWL_DECLARE_RATE_INFO(48, 48, 36, 54, 36, 54, 36, 54),   /* 48mbps */
 118         IWL_DECLARE_RATE_INFO(54, 54, 48, INV, 48, INV, 48, INV),/* 54mbps */
 119         IWL_DECLARE_RATE_INFO(60, 60, 48, INV, 48, INV, 48, INV),/* 60mbps */
 120         /* FIXME:RS:          ^^    should be INV (legacy) */
 121 };
 122 EXPORT_SYMBOL(iwl_rates);
 123
 124 /**
 125  * translate ucode response to mac80211 tx status control values
 126  */
 127 void iwl_hwrate_to_tx_control(struct iwl_priv *priv, u32 rate_n_flags,
 128                                   struct ieee80211_tx_info *info)
 129 {
 130         struct ieee80211_tx_rate *r = &info->control.rates[0];
 131
 132         info->antenna_sel_tx =
 133                 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
 134         if (rate_n_flags & RATE_MCS_HT_MSK)
 135                 r->flags |= IEEE80211_TX_RC_MCS;
 136         if (rate_n_flags & RATE_MCS_GF_MSK)
 137                 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
 138         if (rate_n_flags & RATE_MCS_HT40_MSK)
 139                 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
 140         if (rate_n_flags & RATE_MCS_DUP_MSK)
 141                 r->flags |= IEEE80211_TX_RC_DUP_DATA;
 142         if (rate_n_flags & RATE_MCS_SGI_MSK)
 143                 r->flags |= IEEE80211_TX_RC_SHORT_GI;
 144         r->idx = iwl_hwrate_to_mac80211_idx(rate_n_flags, info->band);
 145 }
 146 EXPORT_SYMBOL(iwl_hwrate_to_tx_control);
 147
 148 int iwl_hwrate_to_plcp_idx(u32 rate_n_flags)
 149 {
 150         int idx = 0;
 151
 152         /* HT rate format */
 153         if (rate_n_flags & RATE_MCS_HT_MSK) {
 154                 idx = (rate_n_flags & 0xff);
 155
 156                 if (idx >= IWL_RATE_MIMO3_6M_PLCP)
 157                         idx = idx - IWL_RATE_MIMO3_6M_PLCP;
 158                 else if (idx >= IWL_RATE_MIMO2_6M_PLCP)
 159                         idx = idx - IWL_RATE_MIMO2_6M_PLCP;
 160
 161                 idx += IWL_FIRST_OFDM_RATE;
 162                 /* skip 9M not supported in ht*/
 163                 if (idx >= IWL_RATE_9M_INDEX)
 164                         idx += 1;
 165                 if ((idx >= IWL_FIRST_OFDM_RATE) && (idx <= IWL_LAST_OFDM_RATE))
 166                         return idx;
 167
 168         /* legacy rate format, search for match in table */
 169         } else {
 170                 for (idx = 0; idx < ARRAY_SIZE(iwl_rates); idx++)
 171                         if (iwl_rates[idx].plcp == (rate_n_flags & 0xFF))
 172                                 return idx;
 173         }
 174
 175         return -1;
 176 }
 177 EXPORT_SYMBOL(iwl_hwrate_to_plcp_idx);
 178
 179 int iwl_hwrate_to_mac80211_idx(u32 rate_n_flags, enum ieee80211_band band)
 180 {
 181         int idx = 0;
 182         int band_offset = 0;
 183
 184         /* HT rate format: mac80211 wants an MCS number, which is just LSB */
 185         if (rate_n_flags & RATE_MCS_HT_MSK) {
 186                 idx = (rate_n_flags & 0xff);
 187                 return idx;
 188         /* Legacy rate format, search for match in table */
 189         } else {
 190                 if (band == IEEE80211_BAND_5GHZ)
 191                         band_offset = IWL_FIRST_OFDM_RATE;
 192                 for (idx = band_offset; idx < IWL_RATE_COUNT_LEGACY; idx++)
 193                         if (iwl_rates[idx].plcp == (rate_n_flags & 0xFF))
 194                                 return idx - band_offset;
 195         }
 196
 197         return -1;
 198 }
 199
 200 u8 iwl_toggle_tx_ant(struct iwl_priv *priv, u8 ant)
 201 {
 202         int i;
 203         u8 ind = ant;
 204         for (i = 0; i < RATE_ANT_NUM - 1; i++) {
 205                 ind = (ind + 1) < RATE_ANT_NUM ?  ind + 1 : 0;
 206                 if (priv->hw_params.valid_tx_ant & BIT(ind))
 207                         return ind;
 208         }
 209         return ant;
 210 }
 211
 212 const u8 iwl_bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
 213 EXPORT_SYMBOL(iwl_bcast_addr);
 214
 215
 216 /* This function both allocates and initializes hw and priv. */
 217 struct ieee80211_hw *iwl_alloc_all(struct iwl_cfg *cfg,
 218                 struct ieee80211_ops *hw_ops)
 219 {
 220         struct iwl_priv *priv;
 221
 222         /* mac80211 allocates memory for this device instance, including
 223          *   space for this driver's private structure */
 224         struct ieee80211_hw *hw =
 225                 ieee80211_alloc_hw(sizeof(struct iwl_priv), hw_ops);
 226         if (hw == NULL) {
 227                 printk(KERN_ERR "%s: Can not allocate network device\n",
 228                        cfg->name);
 229                 goto out;
 230         }
 231
 232         priv = hw->priv;
 233         priv->hw = hw;
 234
 235 out:
 236         return hw;
 237 }
 238 EXPORT_SYMBOL(iwl_alloc_all);
 239
 240 void iwl_hw_detect(struct iwl_priv *priv)
 241 {
 242         priv->hw_rev = _iwl_read32(priv, CSR_HW_REV);
 243         priv->hw_wa_rev = _iwl_read32(priv, CSR_HW_REV_WA_REG);
 244         pci_read_config_byte(priv->pci_dev, PCI_REVISION_ID, &priv->rev_id);
 245 }
 246 EXPORT_SYMBOL(iwl_hw_detect);
 247
 248 int iwl_hw_nic_init(struct iwl_priv *priv)
 249 {
 250         unsigned long flags;
 251         struct iwl_rx_queue *rxq = &priv->rxq;
 252         int ret;
 253
 254         /* nic_init */
 255         spin_lock_irqsave(&priv->lock, flags);
 256         priv->cfg->ops->lib->apm_ops.init(priv);
 257         iwl_write32(priv, CSR_INT_COALESCING, 512 / 32);
 258         spin_unlock_irqrestore(&priv->lock, flags);
 259
 260         ret = priv->cfg->ops->lib->apm_ops.set_pwr_src(priv, IWL_PWR_SRC_VMAIN);
 261
 262         priv->cfg->ops->lib->apm_ops.config(priv);
 263
 264         /* Allocate the RX queue, or reset if it is already allocated */
 265         if (!rxq->bd) {
 266                 ret = iwl_rx_queue_alloc(priv);
 267                 if (ret) {
 268                         IWL_ERR(priv, "Unable to initialize Rx queue\n");
 269                         return -ENOMEM;
 270                 }
 271         } else
 272                 iwl_rx_queue_reset(priv, rxq);
 273
 274         iwl_rx_replenish(priv);
 275
 276         iwl_rx_init(priv, rxq);
 277
 278         spin_lock_irqsave(&priv->lock, flags);
 279
 280         rxq->need_update = 1;
 281         iwl_rx_queue_update_write_ptr(priv, rxq);
 282
 283         spin_unlock_irqrestore(&priv->lock, flags);
 284
 285         /* Allocate and init all Tx and Command queues */
 286         ret = iwl_txq_ctx_reset(priv);
 287         if (ret)
 288                 return ret;
 289
 290         set_bit(STATUS_INIT, &priv->status);
 291
 292         return 0;
 293 }
 294 EXPORT_SYMBOL(iwl_hw_nic_init);
 295
 296 /*
 297  * QoS  support
 298 */
 299 void iwl_activate_qos(struct iwl_priv *priv, u8 force)
 300 {
 301         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 302                 return;
 303
 304         priv->qos_data.def_qos_parm.qos_flags = 0;
 305
 306         if (priv->qos_data.qos_cap.q_AP.queue_request &&
 307             !priv->qos_data.qos_cap.q_AP.txop_request)
 308                 priv->qos_data.def_qos_parm.qos_flags |=
 309                         QOS_PARAM_FLG_TXOP_TYPE_MSK;
 310         if (priv->qos_data.qos_active)
 311                 priv->qos_data.def_qos_parm.qos_flags |=
 312                         QOS_PARAM_FLG_UPDATE_EDCA_MSK;
 313
 314         if (priv->current_ht_config.is_ht)
 315                 priv->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
 316
 317         if (force || iwl_is_associated(priv)) {
 318                 IWL_DEBUG_QOS(priv, "send QoS cmd with Qos active=%d FLAGS=0x%X\n",
 319                                 priv->qos_data.qos_active,
 320                                 priv->qos_data.def_qos_parm.qos_flags);
 321
 322                 iwl_send_cmd_pdu_async(priv, REPLY_QOS_PARAM,
 323                                        sizeof(struct iwl_qosparam_cmd),
 324                                        &priv->qos_data.def_qos_parm, NULL);
 325         }
 326 }
 327 EXPORT_SYMBOL(iwl_activate_qos);
 328
 329 /*
 330  * AC        CWmin         CW max      AIFSN      TXOP Limit    TXOP Limit
 331  *                                              (802.11b)      (802.11a/g)
 332  * AC_BK      15            1023        7           0               0
 333  * AC_BE      15            1023        3           0               0
 334  * AC_VI       7              15        2          6.016ms       3.008ms
 335  * AC_VO       3               7        2          3.264ms       1.504ms
 336  */
 337 void iwl_reset_qos(struct iwl_priv *priv)
 338 {
 339         u16 cw_min = 15;
 340         u16 cw_max = 1023;
 341         u8 aifs = 2;
 342         bool is_legacy = false;
 343         unsigned long flags;
 344         int i;
 345
 346         spin_lock_irqsave(&priv->lock, flags);
 347         /* QoS always active in AP and ADHOC mode
 348          * In STA mode wait for association
 349          */
 350         if (priv->iw_mode == NL80211_IFTYPE_ADHOC ||
 351             priv->iw_mode == NL80211_IFTYPE_AP)
 352                 priv->qos_data.qos_active = 1;
 353         else
 354                 priv->qos_data.qos_active = 0;
 355
 356         /* check for legacy mode */
 357         if ((priv->iw_mode == NL80211_IFTYPE_ADHOC &&
 358             (priv->active_rate & IWL_OFDM_RATES_MASK) == 0) ||
 359             (priv->iw_mode == NL80211_IFTYPE_STATION &&
 360             (priv->staging_rxon.flags & RXON_FLG_SHORT_SLOT_MSK) == 0)) {
 361                 cw_min = 31;
 362                 is_legacy = 1;
 363         }
 364
 365         if (priv->qos_data.qos_active)
 366                 aifs = 3;
 367
 368         /* AC_BE */
 369         priv->qos_data.def_qos_parm.ac[0].cw_min = cpu_to_le16(cw_min);
 370         priv->qos_data.def_qos_parm.ac[0].cw_max = cpu_to_le16(cw_max);
 371         priv->qos_data.def_qos_parm.ac[0].aifsn = aifs;
 372         priv->qos_data.def_qos_parm.ac[0].edca_txop = 0;
 373         priv->qos_data.def_qos_parm.ac[0].reserved1 = 0;
 374
 375         if (priv->qos_data.qos_active) {
 376                 /* AC_BK */
 377                 i = 1;
 378                 priv->qos_data.def_qos_parm.ac[i].cw_min = cpu_to_le16(cw_min);
 379                 priv->qos_data.def_qos_parm.ac[i].cw_max = cpu_to_le16(cw_max);
 380                 priv->qos_data.def_qos_parm.ac[i].aifsn = 7;
 381                 priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
 382                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
 383
 384                 /* AC_VI */
 385                 i = 2;
 386                 priv->qos_data.def_qos_parm.ac[i].cw_min =
 387                         cpu_to_le16((cw_min + 1) / 2 - 1);
 388                 priv->qos_data.def_qos_parm.ac[i].cw_max =
 389                         cpu_to_le16(cw_min);
 390                 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
 391                 if (is_legacy)
 392                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
 393                                 cpu_to_le16(6016);
 394                 else
 395                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
 396                                 cpu_to_le16(3008);
 397                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
 398
 399                 /* AC_VO */
 400                 i = 3;
 401                 priv->qos_data.def_qos_parm.ac[i].cw_min =
 402                         cpu_to_le16((cw_min + 1) / 4 - 1);
 403                 priv->qos_data.def_qos_parm.ac[i].cw_max =
 404                         cpu_to_le16((cw_min + 1) / 2 - 1);
 405                 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
 406                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
 407                 if (is_legacy)
 408                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
 409                                 cpu_to_le16(3264);
 410                 else
 411                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
 412                                 cpu_to_le16(1504);
 413         } else {
 414                 for (i = 1; i < 4; i++) {
 415                         priv->qos_data.def_qos_parm.ac[i].cw_min =
 416                                 cpu_to_le16(cw_min);
 417                         priv->qos_data.def_qos_parm.ac[i].cw_max =
 418                                 cpu_to_le16(cw_max);
 419                         priv->qos_data.def_qos_parm.ac[i].aifsn = aifs;
 420                         priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
 421                         priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
 422                 }
 423         }
 424         IWL_DEBUG_QOS(priv, "set QoS to default \n");
 425
 426         spin_unlock_irqrestore(&priv->lock, flags);
 427 }
 428 EXPORT_SYMBOL(iwl_reset_qos);
 429
 430 #define MAX_BIT_RATE_40_MHZ 150 /* Mbps */
 431 #define MAX_BIT_RATE_20_MHZ 72 /* Mbps */
 432 static void iwlcore_init_ht_hw_capab(const struct iwl_priv *priv,
 433                               struct ieee80211_sta_ht_cap *ht_info,
 434                               enum ieee80211_band band)
 435 {
 436         u16 max_bit_rate = 0;
 437         u8 rx_chains_num = priv->hw_params.rx_chains_num;
 438         u8 tx_chains_num = priv->hw_params.tx_chains_num;
 439
 440         ht_info->cap = 0;
 441         memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));
 442
 443         ht_info->ht_supported = true;
 444
 445         if (priv->cfg->ht_greenfield_support)
 446                 ht_info->cap |= IEEE80211_HT_CAP_GRN_FLD;
 447         ht_info->cap |= IEEE80211_HT_CAP_SGI_20;
 448         if (priv->cfg->support_sm_ps)
 449                 ht_info->cap |= (IEEE80211_HT_CAP_SM_PS &
 450                                      (WLAN_HT_CAP_SM_PS_DYNAMIC << 2));
 451         else
 452                 ht_info->cap |= (IEEE80211_HT_CAP_SM_PS &
 453                                      (WLAN_HT_CAP_SM_PS_DISABLED << 2));
 454
 455         max_bit_rate = MAX_BIT_RATE_20_MHZ;
 456         if (priv->hw_params.ht40_channel & BIT(band)) {
 457                 ht_info->cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 458                 ht_info->cap |= IEEE80211_HT_CAP_SGI_40;
 459                 ht_info->mcs.rx_mask[4] = 0x01;
 460                 max_bit_rate = MAX_BIT_RATE_40_MHZ;
 461         }
 462
 463         if (priv->cfg->mod_params->amsdu_size_8K)
 464                 ht_info->cap |= IEEE80211_HT_CAP_MAX_AMSDU;
 465
 466         ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
 467         ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;
 468
 469         ht_info->mcs.rx_mask[0] = 0xFF;
 470         if (rx_chains_num >= 2)
 471                 ht_info->mcs.rx_mask[1] = 0xFF;
 472         if (rx_chains_num >= 3)
 473                 ht_info->mcs.rx_mask[2] = 0xFF;
 474
 475         /* Highest supported Rx data rate */
 476         max_bit_rate *= rx_chains_num;
 477         WARN_ON(max_bit_rate & ~IEEE80211_HT_MCS_RX_HIGHEST_MASK);
 478         ht_info->mcs.rx_highest = cpu_to_le16(max_bit_rate);
 479
 480         /* Tx MCS capabilities */
 481         ht_info->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
 482         if (tx_chains_num != rx_chains_num) {
 483                 ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
 484                 ht_info->mcs.tx_params |= ((tx_chains_num - 1) <<
 485                                 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT);
 486         }
 487 }
 488
 489 /**
 490  * iwlcore_init_geos - Initialize mac80211's geo/channel info based from eeprom
 491  */
 492 int iwlcore_init_geos(struct iwl_priv *priv)
 493 {
 494         struct iwl_channel_info *ch;
 495         struct ieee80211_supported_band *sband;
 496         struct ieee80211_channel *channels;
 497         struct ieee80211_channel *geo_ch;
 498         struct ieee80211_rate *rates;
 499         int i = 0;
 500
 501         if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
 502             priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
 503                 IWL_DEBUG_INFO(priv, "Geography modes already initialized.\n");
 504                 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
 505                 return 0;
 506         }
 507
 508         channels = kzalloc(sizeof(struct ieee80211_channel) *
 509                            priv->channel_count, GFP_KERNEL);
 510         if (!channels)
 511                 return -ENOMEM;
 512
 513         rates = kzalloc((sizeof(struct ieee80211_rate) * IWL_RATE_COUNT_LEGACY),
 514                         GFP_KERNEL);
 515         if (!rates) {
 516                 kfree(channels);
 517                 return -ENOMEM;
 518         }
 519
 520         /* 5.2GHz channels start after the 2.4GHz channels */
 521         sband = &priv->bands[IEEE80211_BAND_5GHZ];
 522         sband->channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)];
 523         /* just OFDM */
 524         sband->bitrates = &rates[IWL_FIRST_OFDM_RATE];
 525         sband->n_bitrates = IWL_RATE_COUNT_LEGACY - IWL_FIRST_OFDM_RATE;
 526
 527         if (priv->cfg->sku & IWL_SKU_N)
 528                 iwlcore_init_ht_hw_capab(priv, &sband->ht_cap,
 529                                          IEEE80211_BAND_5GHZ);
 530
 531         sband = &priv->bands[IEEE80211_BAND_2GHZ];
 532         sband->channels = channels;
 533         /* OFDM & CCK */
 534         sband->bitrates = rates;
 535         sband->n_bitrates = IWL_RATE_COUNT_LEGACY;
 536
 537         if (priv->cfg->sku & IWL_SKU_N)
 538                 iwlcore_init_ht_hw_capab(priv, &sband->ht_cap,
 539                                          IEEE80211_BAND_2GHZ);
 540
 541         priv->ieee_channels = channels;
 542         priv->ieee_rates = rates;
 543
 544         for (i = 0;  i < priv->channel_count; i++) {
 545                 ch = &priv->channel_info[i];
 546
 547                 /* FIXME: might be removed if scan is OK */
 548                 if (!is_channel_valid(ch))
 549                         continue;
 550
 551                 if (is_channel_a_band(ch))
 552                         sband =  &priv->bands[IEEE80211_BAND_5GHZ];
 553                 else
 554                         sband =  &priv->bands[IEEE80211_BAND_2GHZ];
 555
 556                 geo_ch = &sband->channels[sband->n_channels++];
 557
 558                 geo_ch->center_freq =
 559                                 ieee80211_channel_to_frequency(ch->channel);
 560                 geo_ch->max_power = ch->max_power_avg;
 561                 geo_ch->max_antenna_gain = 0xff;
 562                 geo_ch->hw_value = ch->channel;
 563
 564                 if (is_channel_valid(ch)) {
 565                         if (!(ch->flags & EEPROM_CHANNEL_IBSS))
 566                                 geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
 567
 568                         if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
 569                                 geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
 570
 571                         if (ch->flags & EEPROM_CHANNEL_RADAR)
 572                                 geo_ch->flags |= IEEE80211_CHAN_RADAR;
 573
 574                         geo_ch->flags |= ch->ht40_extension_channel;
 575
 576                         if (ch->max_power_avg > priv->tx_power_device_lmt)
 577                                 priv->tx_power_device_lmt = ch->max_power_avg;
 578                 } else {
 579                         geo_ch->flags |= IEEE80211_CHAN_DISABLED;
 580                 }
 581
 582                 IWL_DEBUG_INFO(priv, "Channel %d Freq=%d[%sGHz] %s flag=0x%X\n",
 583                                 ch->channel, geo_ch->center_freq,
 584                                 is_channel_a_band(ch) ?  "5.2" : "2.4",
 585                                 geo_ch->flags & IEEE80211_CHAN_DISABLED ?
 586                                 "restricted" : "valid",
 587                                  geo_ch->flags);
 588         }
 589
 590         if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) &&
 591              priv->cfg->sku & IWL_SKU_A) {
 592                 IWL_INFO(priv, "Incorrectly detected BG card as ABG. "
 593                         "Please send your PCI ID 0x%04X:0x%04X to maintainer.\n",
 594                            priv->pci_dev->device,
 595                            priv->pci_dev->subsystem_device);
 596                 priv->cfg->sku &= ~IWL_SKU_A;
 597         }
 598
 599         IWL_INFO(priv, "Tunable channels: %d 802.11bg, %d 802.11a channels\n",
 600                    priv->bands[IEEE80211_BAND_2GHZ].n_channels,
 601                    priv->bands[IEEE80211_BAND_5GHZ].n_channels);
 602
 603         set_bit(STATUS_GEO_CONFIGURED, &priv->status);
 604
 605         return 0;
 606 }
 607 EXPORT_SYMBOL(iwlcore_init_geos);
 608
 609 /*
 610  * iwlcore_free_geos - undo allocations in iwlcore_init_geos
 611  */
 612 void iwlcore_free_geos(struct iwl_priv *priv)
 613 {
 614         kfree(priv->ieee_channels);
 615         kfree(priv->ieee_rates);
 616         clear_bit(STATUS_GEO_CONFIGURED, &priv->status);
 617 }
 618 EXPORT_SYMBOL(iwlcore_free_geos);
 619
 620 /*
 621  *  iwlcore_rts_tx_cmd_flag: Set rts/cts. 3945 and 4965 only share this
 622  *  function.
 623  */
 624 void iwlcore_rts_tx_cmd_flag(struct ieee80211_tx_info *info,
 625                                 __le32 *tx_flags)
 626 {
 627         if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) {
 628                 *tx_flags |= TX_CMD_FLG_RTS_MSK;
 629                 *tx_flags &= ~TX_CMD_FLG_CTS_MSK;
 630         } else if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
 631                 *tx_flags &= ~TX_CMD_FLG_RTS_MSK;
 632                 *tx_flags |= TX_CMD_FLG_CTS_MSK;
 633         }
 634 }
 635 EXPORT_SYMBOL(iwlcore_rts_tx_cmd_flag);
 636
 637 static bool is_single_rx_stream(struct iwl_priv *priv)
 638 {
 639         return !priv->current_ht_config.is_ht ||
 640                priv->current_ht_config.single_chain_sufficient;
 641 }
 642
 643 static u8 iwl_is_channel_extension(struct iwl_priv *priv,
 644                                    enum ieee80211_band band,
 645                                    u16 channel, u8 extension_chan_offset)
 646 {
 647         const struct iwl_channel_info *ch_info;
 648
 649         ch_info = iwl_get_channel_info(priv, band, channel);
 650         if (!is_channel_valid(ch_info))
 651                 return 0;
 652
 653         if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE)
 654                 return !(ch_info->ht40_extension_channel &
 655                                         IEEE80211_CHAN_NO_HT40PLUS);
 656         else if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW)
 657                 return !(ch_info->ht40_extension_channel &
 658                                         IEEE80211_CHAN_NO_HT40MINUS);
 659
 660         return 0;
 661 }
 662
 663 u8 iwl_is_ht40_tx_allowed(struct iwl_priv *priv,
 664                          struct ieee80211_sta_ht_cap *sta_ht_inf)
 665 {
 666         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
 667
 668         if (!ht_conf->is_ht || !ht_conf->is_40mhz)
 669                 return 0;
 670
 671         /* We do not check for IEEE80211_HT_CAP_SUP_WIDTH_20_40
 672          * the bit will not set if it is pure 40MHz case
 673          */
 674         if (sta_ht_inf) {
 675                 if (!sta_ht_inf->ht_supported)
 676                         return 0;
 677         }
 678 #ifdef CONFIG_IWLWIFI_DEBUG
 679         if (priv->disable_ht40)
 680                 return 0;
 681 #endif
 682         return iwl_is_channel_extension(priv, priv->band,
 683                         le16_to_cpu(priv->staging_rxon.channel),
 684                         ht_conf->extension_chan_offset);
 685 }
 686 EXPORT_SYMBOL(iwl_is_ht40_tx_allowed);
 687
 688 static u16 iwl_adjust_beacon_interval(u16 beacon_val, u16 max_beacon_val)
 689 {
 690         u16 new_val = 0;
 691         u16 beacon_factor = 0;
 692
 693         beacon_factor = (beacon_val + max_beacon_val) / max_beacon_val;
 694         new_val = beacon_val / beacon_factor;
 695
 696         if (!new_val)
 697                 new_val = max_beacon_val;
 698
 699         return new_val;
 700 }
 701
 702 void iwl_setup_rxon_timing(struct iwl_priv *priv)
 703 {
 704         u64 tsf;
 705         s32 interval_tm, rem;
 706         unsigned long flags;
 707         struct ieee80211_conf *conf = NULL;
 708         u16 beacon_int;
 709
 710         conf = ieee80211_get_hw_conf(priv->hw);
 711
 712         spin_lock_irqsave(&priv->lock, flags);
 713         priv->rxon_timing.timestamp = cpu_to_le64(priv->timestamp);
 714         priv->rxon_timing.listen_interval = cpu_to_le16(conf->listen_interval);
 715
 716         if (priv->iw_mode == NL80211_IFTYPE_STATION) {
 717                 beacon_int = priv->beacon_int;
 718                 priv->rxon_timing.atim_window = 0;
 719         } else {
 720                 beacon_int = priv->vif->bss_conf.beacon_int;
 721
 722                 /* TODO: we need to get atim_window from upper stack
 723                  * for now we set to 0 */
 724                 priv->rxon_timing.atim_window = 0;
 725         }
 726
 727         beacon_int = iwl_adjust_beacon_interval(beacon_int,
 728                                 priv->hw_params.max_beacon_itrvl * 1024);
 729         priv->rxon_timing.beacon_interval = cpu_to_le16(beacon_int);
 730
 731         tsf = priv->timestamp; /* tsf is modifed by do_div: copy it */
 732         interval_tm = beacon_int * 1024;
 733         rem = do_div(tsf, interval_tm);
 734         priv->rxon_timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
 735
 736         spin_unlock_irqrestore(&priv->lock, flags);
 737         IWL_DEBUG_ASSOC(priv,
 738                         "beacon interval %d beacon timer %d beacon tim %d\n",
 739                         le16_to_cpu(priv->rxon_timing.beacon_interval),
 740                         le32_to_cpu(priv->rxon_timing.beacon_init_val),
 741                         le16_to_cpu(priv->rxon_timing.atim_window));
 742 }
 743 EXPORT_SYMBOL(iwl_setup_rxon_timing);
 744
 745 void iwl_set_rxon_hwcrypto(struct iwl_priv *priv, int hw_decrypt)
 746 {
 747         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
 748
 749         if (hw_decrypt)
 750                 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
 751         else
 752                 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
 753
 754 }
 755 EXPORT_SYMBOL(iwl_set_rxon_hwcrypto);
 756
 757 /**
 758  * iwl_check_rxon_cmd - validate RXON structure is valid
 759  *
 760  * NOTE:  This is really only useful during development and can eventually
 761  * be #ifdef'd out once the driver is stable and folks aren't actively
 762  * making changes
 763  */
 764 int iwl_check_rxon_cmd(struct iwl_priv *priv)
 765 {
 766         int error = 0;
 767         int counter = 1;
 768         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
 769
 770         if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
 771                 error |= le32_to_cpu(rxon->flags &
 772                                 (RXON_FLG_TGJ_NARROW_BAND_MSK |
 773                                  RXON_FLG_RADAR_DETECT_MSK));
 774                 if (error)
 775                         IWL_WARN(priv, "check 24G fields %d | %d\n",
 776                                     counter++, error);
 777         } else {
 778                 error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ?
 779                                 0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK);
 780                 if (error)
 781                         IWL_WARN(priv, "check 52 fields %d | %d\n",
 782                                     counter++, error);
 783                 error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK);
 784                 if (error)
 785                         IWL_WARN(priv, "check 52 CCK %d | %d\n",
 786                                     counter++, error);
 787         }
 788         error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1;
 789         if (error)
 790                 IWL_WARN(priv, "check mac addr %d | %d\n", counter++, error);
 791
 792         /* make sure basic rates 6Mbps and 1Mbps are supported */
 793         error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) &&
 794                   ((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0));
 795         if (error)
 796                 IWL_WARN(priv, "check basic rate %d | %d\n", counter++, error);
 797
 798         error |= (le16_to_cpu(rxon->assoc_id) > 2007);
 799         if (error)
 800                 IWL_WARN(priv, "check assoc id %d | %d\n", counter++, error);
 801
 802         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
 803                         == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK));
 804         if (error)
 805                 IWL_WARN(priv, "check CCK and short slot %d | %d\n",
 806                             counter++, error);
 807
 808         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
 809                         == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK));
 810         if (error)
 811                 IWL_WARN(priv, "check CCK & auto detect %d | %d\n",
 812                             counter++, error);
 813
 814         error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
 815                         RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK);
 816         if (error)
 817                 IWL_WARN(priv, "check TGG and auto detect %d | %d\n",
 818                             counter++, error);
 819
 820         if (error)
 821                 IWL_WARN(priv, "Tuning to channel %d\n",
 822                             le16_to_cpu(rxon->channel));
 823
 824         if (error) {
 825                 IWL_ERR(priv, "Not a valid iwl_rxon_assoc_cmd field values\n");
 826                 return -1;
 827         }
 828         return 0;
 829 }
 830 EXPORT_SYMBOL(iwl_check_rxon_cmd);
 831
 832 /**
 833  * iwl_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
 834  * @priv: staging_rxon is compared to active_rxon
 835  *
 836  * If the RXON structure is changing enough to require a new tune,
 837  * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
 838  * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
 839  */
 840 int iwl_full_rxon_required(struct iwl_priv *priv)
 841 {
 842
 843         /* These items are only settable from the full RXON command */
 844         if (!(iwl_is_associated(priv)) ||
 845             compare_ether_addr(priv->staging_rxon.bssid_addr,
 846                                priv->active_rxon.bssid_addr) ||
 847             compare_ether_addr(priv->staging_rxon.node_addr,
 848                                priv->active_rxon.node_addr) ||
 849             compare_ether_addr(priv->staging_rxon.wlap_bssid_addr,
 850                                priv->active_rxon.wlap_bssid_addr) ||
 851             (priv->staging_rxon.dev_type != priv->active_rxon.dev_type) ||
 852             (priv->staging_rxon.channel != priv->active_rxon.channel) ||
 853             (priv->staging_rxon.air_propagation !=
 854              priv->active_rxon.air_propagation) ||
 855             (priv->staging_rxon.ofdm_ht_single_stream_basic_rates !=
 856              priv->active_rxon.ofdm_ht_single_stream_basic_rates) ||
 857             (priv->staging_rxon.ofdm_ht_dual_stream_basic_rates !=
 858              priv->active_rxon.ofdm_ht_dual_stream_basic_rates) ||
 859             (priv->staging_rxon.ofdm_ht_triple_stream_basic_rates !=
 860              priv->active_rxon.ofdm_ht_triple_stream_basic_rates) ||
 861             (priv->staging_rxon.assoc_id != priv->active_rxon.assoc_id))
 862                 return 1;
 863
 864         /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
 865          * be updated with the RXON_ASSOC command -- however only some
 866          * flag transitions are allowed using RXON_ASSOC */
 867
 868         /* Check if we are not switching bands */
 869         if ((priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) !=
 870             (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK))
 871                 return 1;
 872
 873         /* Check if we are switching association toggle */
 874         if ((priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) !=
 875                 (priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK))
 876                 return 1;
 877
 878         return 0;
 879 }
 880 EXPORT_SYMBOL(iwl_full_rxon_required);
 881
 882 u8 iwl_rate_get_lowest_plcp(struct iwl_priv *priv)
 883 {
 884         int i;
 885         int rate_mask;
 886
 887         /* Set rate mask*/
 888         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)
 889                 rate_mask = priv->active_rate_basic & IWL_CCK_RATES_MASK;
 890         else
 891                 rate_mask = priv->active_rate_basic & IWL_OFDM_RATES_MASK;
 892
 893         /* Find lowest valid rate */
 894         for (i = IWL_RATE_1M_INDEX; i != IWL_RATE_INVALID;
 895                                         i = iwl_rates[i].next_ieee) {
 896                 if (rate_mask & (1 << i))
 897                         return iwl_rates[i].plcp;
 898         }
 899
 900         /* No valid rate was found. Assign the lowest one */
 901         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)
 902                 return IWL_RATE_1M_PLCP;
 903         else
 904                 return IWL_RATE_6M_PLCP;
 905 }
 906 EXPORT_SYMBOL(iwl_rate_get_lowest_plcp);
 907
 908 void iwl_set_rxon_ht(struct iwl_priv *priv, struct iwl_ht_config *ht_conf)
 909 {
 910         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
 911
 912         if (!ht_conf->is_ht) {
 913                 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
 914                         RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK |
 915                         RXON_FLG_HT40_PROT_MSK |
 916                         RXON_FLG_HT_PROT_MSK);
 917                 return;
 918         }
 919
 920         /* FIXME: if the definition of ht_protection changed, the "translation"
 921          * will be needed for rxon->flags
 922          */
 923         rxon->flags |= cpu_to_le32(ht_conf->ht_protection << RXON_FLG_HT_OPERATING_MODE_POS);
 924
 925         /* Set up channel bandwidth:
 926          * 20 MHz only, 20/40 mixed or pure 40 if ht40 ok */
 927         /* clear the HT channel mode before set the mode */
 928         rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
 929                          RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
 930         if (iwl_is_ht40_tx_allowed(priv, NULL)) {
 931                 /* pure ht40 */
 932                 if (ht_conf->ht_protection == IEEE80211_HT_OP_MODE_PROTECTION_20MHZ) {
 933                         rxon->flags |= RXON_FLG_CHANNEL_MODE_PURE_40;
 934                         /* Note: control channel is opposite of extension channel */
 935                         switch (ht_conf->extension_chan_offset) {
 936                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 937                                 rxon->flags &= ~RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
 938                                 break;
 939                         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 940                                 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
 941                                 break;
 942                         }
 943                 } else {
 944                         /* Note: control channel is opposite of extension channel */
 945                         switch (ht_conf->extension_chan_offset) {
 946                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 947                                 rxon->flags &= ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
 948                                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
 949                                 break;
 950                         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 951                                 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
 952                                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
 953                                 break;
 954                         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
 955                         default:
 956                                 /* channel location only valid if in Mixed mode */
 957                                 IWL_ERR(priv, "invalid extension channel offset\n");
 958                                 break;
 959                         }
 960                 }
 961         } else {
 962                 rxon->flags |= RXON_FLG_CHANNEL_MODE_LEGACY;
 963         }
 964
 965         if (priv->cfg->ops->hcmd->set_rxon_chain)
 966                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
 967
 968         IWL_DEBUG_ASSOC(priv, "rxon flags 0x%X operation mode :0x%X "
 969                         "extension channel offset 0x%x\n",
 970                         le32_to_cpu(rxon->flags), ht_conf->ht_protection,
 971                         ht_conf->extension_chan_offset);
 972         return;
 973 }
 974 EXPORT_SYMBOL(iwl_set_rxon_ht);
 975
 976 #define IWL_NUM_RX_CHAINS_MULTIPLE      3
 977 #define IWL_NUM_RX_CHAINS_SINGLE        2
 978 #define IWL_NUM_IDLE_CHAINS_DUAL        2
 979 #define IWL_NUM_IDLE_CHAINS_SINGLE      1
 980
 981 /*
 982  * Determine how many receiver/antenna chains to use.
 983  *
 984  * More provides better reception via diversity.  Fewer saves power
 985  * at the expense of throughput, but only when not in powersave to
 986  * start with.
 987  *
 988  * MIMO (dual stream) requires at least 2, but works better with 3.
 989  * This does not determine *which* chains to use, just how many.
 990  */
 991 static int iwl_get_active_rx_chain_count(struct iwl_priv *priv)
 992 {
 993         /* # of Rx chains to use when expecting MIMO. */
 994         if (is_single_rx_stream(priv))
 995                 return IWL_NUM_RX_CHAINS_SINGLE;
 996         else
 997                 return IWL_NUM_RX_CHAINS_MULTIPLE;
 998 }
 999
1000 /*
1001  * When we are in power saving mode, unless device support spatial
1002  * multiplexing power save, use the active count for rx chain count.
1003  */
1004 static int iwl_get_idle_rx_chain_count(struct iwl_priv *priv, int active_cnt)
1005 {
1006         int idle_cnt = active_cnt;
1007         bool is_cam = !test_bit(STATUS_POWER_PMI, &priv->status);
1008
1009         if (priv->cfg->support_sm_ps) {
1010                 /* # Rx chains when idling and maybe trying to save power */
1011                 switch (priv->current_ht_config.sm_ps) {
1012                 case WLAN_HT_CAP_SM_PS_STATIC:
1013                 case WLAN_HT_CAP_SM_PS_DYNAMIC:
1014                         idle_cnt = (is_cam) ? IWL_NUM_IDLE_CHAINS_DUAL :
1015                                 IWL_NUM_IDLE_CHAINS_SINGLE;
1016                         break;
1017                 case WLAN_HT_CAP_SM_PS_DISABLED:
1018                         idle_cnt = (is_cam) ? active_cnt :
1019                                 IWL_NUM_IDLE_CHAINS_SINGLE;
1020                         break;
1021                 case WLAN_HT_CAP_SM_PS_INVALID:
1022                 default:
1023                         IWL_ERR(priv, "invalid sm_ps mode %d\n",
1024                                 priv->current_ht_config.sm_ps);
1025                         WARN_ON(1);
1026                         break;
1027                 }
1028         }
1029         return idle_cnt;
1030 }
1031
1032 /* up to 4 chains */
1033 static u8 iwl_count_chain_bitmap(u32 chain_bitmap)
1034 {
1035         u8 res;
1036         res = (chain_bitmap & BIT(0)) >> 0;
1037         res += (chain_bitmap & BIT(1)) >> 1;
1038         res += (chain_bitmap & BIT(2)) >> 2;
1039         res += (chain_bitmap & BIT(3)) >> 3;
1040         return res;
1041 }
1042
1043 /**
1044  * iwl_is_monitor_mode - Determine if interface in monitor mode
1045  *
1046  * priv->iw_mode is set in add_interface, but add_interface is
1047  * never called for monitor mode. The only way mac80211 informs us about
1048  * monitor mode is through configuring filters (call to configure_filter).
1049  */
1050 bool iwl_is_monitor_mode(struct iwl_priv *priv)
1051 {
1052         return !!(priv->staging_rxon.filter_flags & RXON_FILTER_PROMISC_MSK);
1053 }
1054 EXPORT_SYMBOL(iwl_is_monitor_mode);
1055
1056 /**
1057  * iwl_set_rxon_chain - Set up Rx chain usage in "staging" RXON image
1058  *
1059  * Selects how many and which Rx receivers/antennas/chains to use.
1060  * This should not be used for scan command ... it puts data in wrong place.
1061  */
1062 void iwl_set_rxon_chain(struct iwl_priv *priv)
1063 {
1064         bool is_single = is_single_rx_stream(priv);
1065         bool is_cam = !test_bit(STATUS_POWER_PMI, &priv->status);
1066         u8 idle_rx_cnt, active_rx_cnt, valid_rx_cnt;
1067         u32 active_chains;
1068         u16 rx_chain;
1069
1070         /* Tell uCode which antennas are actually connected.
1071          * Before first association, we assume all antennas are connected.
1072          * Just after first association, iwl_chain_noise_calibration()
1073          *    checks which antennas actually *are* connected. */
1074          if (priv->chain_noise_data.active_chains)
1075                 active_chains = priv->chain_noise_data.active_chains;
1076         else
1077                 active_chains = priv->hw_params.valid_rx_ant;
1078
1079         rx_chain = active_chains << RXON_RX_CHAIN_VALID_POS;
1080
1081         /* How many receivers should we use? */
1082         active_rx_cnt = iwl_get_active_rx_chain_count(priv);
1083         idle_rx_cnt = iwl_get_idle_rx_chain_count(priv, active_rx_cnt);
1084
1085
1086         /* correct rx chain count according hw settings
1087          * and chain noise calibration
1088          */
1089         valid_rx_cnt = iwl_count_chain_bitmap(active_chains);
1090         if (valid_rx_cnt < active_rx_cnt)
1091                 active_rx_cnt = valid_rx_cnt;
1092
1093         if (valid_rx_cnt < idle_rx_cnt)
1094                 idle_rx_cnt = valid_rx_cnt;
1095
1096         rx_chain |= active_rx_cnt << RXON_RX_CHAIN_MIMO_CNT_POS;
1097         rx_chain |= idle_rx_cnt  << RXON_RX_CHAIN_CNT_POS;
1098
1099         /* copied from 'iwl_bg_request_scan()' */
1100         /* Force use of chains B and C (0x6) for Rx for 4965
1101          * Avoid A (0x1) because of its off-channel reception on A-band.
1102          * MIMO is not used here, but value is required */
1103         if (iwl_is_monitor_mode(priv) &&
1104             !(priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) &&
1105             ((priv->hw_rev & CSR_HW_REV_TYPE_MSK) == CSR_HW_REV_TYPE_4965)) {
1106                 rx_chain = ANT_ABC << RXON_RX_CHAIN_VALID_POS;
1107                 rx_chain |= ANT_BC << RXON_RX_CHAIN_FORCE_SEL_POS;
1108                 rx_chain |= ANT_ABC << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS;
1109                 rx_chain |= 0x1 << RXON_RX_CHAIN_DRIVER_FORCE_POS;
1110         }
1111
1112         priv->staging_rxon.rx_chain = cpu_to_le16(rx_chain);
1113
1114         if (!is_single && (active_rx_cnt >= IWL_NUM_RX_CHAINS_SINGLE) && is_cam)
1115                 priv->staging_rxon.rx_chain |= RXON_RX_CHAIN_MIMO_FORCE_MSK;
1116         else
1117                 priv->staging_rxon.rx_chain &= ~RXON_RX_CHAIN_MIMO_FORCE_MSK;
1118
1119         IWL_DEBUG_ASSOC(priv, "rx_chain=0x%X active=%d idle=%d\n",
1120                         priv->staging_rxon.rx_chain,
1121                         active_rx_cnt, idle_rx_cnt);
1122
1123         WARN_ON(active_rx_cnt == 0 || idle_rx_cnt == 0 ||
1124                 active_rx_cnt < idle_rx_cnt);
1125 }
1126 EXPORT_SYMBOL(iwl_set_rxon_chain);
1127
1128 /**
1129  * iwl_set_rxon_channel - Set the phymode and channel values in staging RXON
1130  * @phymode: MODE_IEEE80211A sets to 5.2GHz; all else set to 2.4GHz
1131  * @channel: Any channel valid for the requested phymode
1132
1133  * In addition to setting the staging RXON, priv->phymode is also set.
1134  *
1135  * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
1136  * in the staging RXON flag structure based on the phymode
1137  */
1138 int iwl_set_rxon_channel(struct iwl_priv *priv, struct ieee80211_channel *ch)
1139 {
1140         enum ieee80211_band band = ch->band;
1141         u16 channel = ieee80211_frequency_to_channel(ch->center_freq);
1142
1143         if (!iwl_get_channel_info(priv, band, channel)) {
1144                 IWL_DEBUG_INFO(priv, "Could not set channel to %d [%d]\n",
1145                                channel, band);
1146                 return -EINVAL;
1147         }
1148
1149         if ((le16_to_cpu(priv->staging_rxon.channel) == channel) &&
1150             (priv->band == band))
1151                 return 0;
1152
1153         priv->staging_rxon.channel = cpu_to_le16(channel);
1154         if (band == IEEE80211_BAND_5GHZ)
1155                 priv->staging_rxon.flags &= ~RXON_FLG_BAND_24G_MSK;
1156         else
1157                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
1158
1159         priv->band = band;
1160
1161         IWL_DEBUG_INFO(priv, "Staging channel set to %d [%d]\n", channel, band);
1162
1163         return 0;
1164 }
1165 EXPORT_SYMBOL(iwl_set_rxon_channel);
1166
1167 void iwl_set_flags_for_band(struct iwl_priv *priv,
1168                             enum ieee80211_band band)
1169 {
1170         if (band == IEEE80211_BAND_5GHZ) {
1171                 priv->staging_rxon.flags &=
1172                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
1173                       | RXON_FLG_CCK_MSK);
1174                 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
1175         } else {
1176                 /* Copied from iwl_post_associate() */
1177                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
1178                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
1179                 else
1180                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
1181
1182                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
1183                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
1184
1185                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
1186                 priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
1187                 priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
1188         }
1189 }
1190
1191 /*
1192  * initialize rxon structure with default values from eeprom
1193  */
1194 void iwl_connection_init_rx_config(struct iwl_priv *priv, int mode)
1195 {
1196         const struct iwl_channel_info *ch_info;
1197
1198         memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
1199
1200         switch (mode) {
1201         case NL80211_IFTYPE_AP:
1202                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
1203                 break;
1204
1205         case NL80211_IFTYPE_STATION:
1206                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
1207                 priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
1208                 break;
1209
1210         case NL80211_IFTYPE_ADHOC:
1211                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
1212                 priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
1213                 priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
1214                                                   RXON_FILTER_ACCEPT_GRP_MSK;
1215                 break;
1216
1217         default:
1218                 IWL_ERR(priv, "Unsupported interface type %d\n", mode);
1219                 break;
1220         }
1221
1222 #if 0
1223         /* TODO:  Figure out when short_preamble would be set and cache from
1224          * that */
1225         if (!hw_to_local(priv->hw)->short_preamble)
1226                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
1227         else
1228                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
1229 #endif
1230
1231         ch_info = iwl_get_channel_info(priv, priv->band,
1232                                        le16_to_cpu(priv->active_rxon.channel));
1233
1234         if (!ch_info)
1235                 ch_info = &priv->channel_info[0];
1236
1237         /*
1238          * in some case A channels are all non IBSS
1239          * in this case force B/G channel
1240          */
1241         if ((priv->iw_mode == NL80211_IFTYPE_ADHOC) &&
1242             !(is_channel_ibss(ch_info)))
1243                 ch_info = &priv->channel_info[0];
1244
1245         priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
1246         priv->band = ch_info->band;
1247
1248         iwl_set_flags_for_band(priv, priv->band);
1249
1250         priv->staging_rxon.ofdm_basic_rates =
1251             (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
1252         priv->staging_rxon.cck_basic_rates =
1253             (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
1254
1255         /* clear both MIX and PURE40 mode flag */
1256         priv->staging_rxon.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED |
1257                                         RXON_FLG_CHANNEL_MODE_PURE_40);
1258         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
1259         memcpy(priv->staging_rxon.wlap_bssid_addr, priv->mac_addr, ETH_ALEN);
1260         priv->staging_rxon.ofdm_ht_single_stream_basic_rates = 0xff;
1261         priv->staging_rxon.ofdm_ht_dual_stream_basic_rates = 0xff;
1262         priv->staging_rxon.ofdm_ht_triple_stream_basic_rates = 0xff;
1263 }
1264 EXPORT_SYMBOL(iwl_connection_init_rx_config);
1265
1266 static void iwl_set_rate(struct iwl_priv *priv)
1267 {
1268         const struct ieee80211_supported_band *hw = NULL;
1269         struct ieee80211_rate *rate;
1270         int i;
1271
1272         hw = iwl_get_hw_mode(priv, priv->band);
1273         if (!hw) {
1274                 IWL_ERR(priv, "Failed to set rate: unable to get hw mode\n");
1275                 return;
1276         }
1277
1278         priv->active_rate = 0;
1279         priv->active_rate_basic = 0;
1280
1281         for (i = 0; i < hw->n_bitrates; i++) {
1282                 rate = &(hw->bitrates[i]);
1283                 if (rate->hw_value < IWL_RATE_COUNT_LEGACY)
1284                         priv->active_rate |= (1 << rate->hw_value);
1285         }
1286
1287         IWL_DEBUG_RATE(priv, "Set active_rate = %0x, active_rate_basic = %0x\n",
1288                        priv->active_rate, priv->active_rate_basic);
1289
1290         /*
1291          * If a basic rate is configured, then use it (adding IWL_RATE_1M_MASK)
1292          * otherwise set it to the default of all CCK rates and 6, 12, 24 for
1293          * OFDM
1294          */
1295         if (priv->active_rate_basic & IWL_CCK_BASIC_RATES_MASK)
1296                 priv->staging_rxon.cck_basic_rates =
1297                     ((priv->active_rate_basic &
1298                       IWL_CCK_RATES_MASK) >> IWL_FIRST_CCK_RATE) & 0xF;
1299         else
1300                 priv->staging_rxon.cck_basic_rates =
1301                     (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
1302
1303         if (priv->active_rate_basic & IWL_OFDM_BASIC_RATES_MASK)
1304                 priv->staging_rxon.ofdm_basic_rates =
1305                     ((priv->active_rate_basic &
1306                       (IWL_OFDM_BASIC_RATES_MASK | IWL_RATE_6M_MASK)) >>
1307                       IWL_FIRST_OFDM_RATE) & 0xFF;
1308         else
1309                 priv->staging_rxon.ofdm_basic_rates =
1310                    (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
1311 }
1312
1313 void iwl_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
1314 {
1315         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1316         struct iwl_rxon_cmd *rxon = (void *)&priv->active_rxon;
1317         struct iwl_csa_notification *csa = &(pkt->u.csa_notif);
1318
1319         if (priv->switch_rxon.switch_in_progress) {
1320                 if (!le32_to_cpu(csa->status) &&
1321                     (csa->channel == priv->switch_rxon.channel)) {
1322                         rxon->channel = csa->channel;
1323                         priv->staging_rxon.channel = csa->channel;
1324                         IWL_DEBUG_11H(priv, "CSA notif: channel %d\n",
1325                               le16_to_cpu(csa->channel));
1326                 } else
1327                         IWL_ERR(priv, "CSA notif (fail) : channel %d\n",
1328                               le16_to_cpu(csa->channel));
1329
1330                 priv->switch_rxon.switch_in_progress = false;
1331         }
1332 }
1333 EXPORT_SYMBOL(iwl_rx_csa);
1334
1335 #ifdef CONFIG_IWLWIFI_DEBUG
1336 void iwl_print_rx_config_cmd(struct iwl_priv *priv)
1337 {
1338         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
1339
1340         IWL_DEBUG_RADIO(priv, "RX CONFIG:\n");
1341         iwl_print_hex_dump(priv, IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
1342         IWL_DEBUG_RADIO(priv, "u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
1343         IWL_DEBUG_RADIO(priv, "u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
1344         IWL_DEBUG_RADIO(priv, "u32 filter_flags: 0x%08x\n",
1345                         le32_to_cpu(rxon->filter_flags));
1346         IWL_DEBUG_RADIO(priv, "u8 dev_type: 0x%x\n", rxon->dev_type);
1347         IWL_DEBUG_RADIO(priv, "u8 ofdm_basic_rates: 0x%02x\n",
1348                         rxon->ofdm_basic_rates);
1349         IWL_DEBUG_RADIO(priv, "u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
1350         IWL_DEBUG_RADIO(priv, "u8[6] node_addr: %pM\n", rxon->node_addr);
1351         IWL_DEBUG_RADIO(priv, "u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
1352         IWL_DEBUG_RADIO(priv, "u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
1353 }
1354 EXPORT_SYMBOL(iwl_print_rx_config_cmd);
1355 #endif
1356 /**
1357  * iwl_irq_handle_error - called for HW or SW error interrupt from card
1358  */
1359 void iwl_irq_handle_error(struct iwl_priv *priv)
1360 {
1361         /* Set the FW error flag -- cleared on iwl_down */
1362         set_bit(STATUS_FW_ERROR, &priv->status);
1363
1364         /* Cancel currently queued command. */
1365         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
1366
1367 #ifdef CONFIG_IWLWIFI_DEBUG
1368         if (iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) {
1369                 priv->cfg->ops->lib->dump_nic_error_log(priv);
1370                 priv->cfg->ops->lib->dump_nic_event_log(priv);
1371                 iwl_print_rx_config_cmd(priv);
1372         }
1373 #endif
1374
1375         wake_up_interruptible(&priv->wait_command_queue);
1376
1377         /* Keep the restart process from trying to send host
1378          * commands by clearing the INIT status bit */
1379         clear_bit(STATUS_READY, &priv->status);
1380
1381         if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1382                 IWL_DEBUG(priv, IWL_DL_FW_ERRORS,
1383                           "Restarting adapter due to uCode error.\n");
1384
1385                 if (priv->cfg->mod_params->restart_fw)
1386                         queue_work(priv->workqueue, &priv->restart);
1387         }
1388 }
1389 EXPORT_SYMBOL(iwl_irq_handle_error);
1390
1391 int iwl_apm_stop_master(struct iwl_priv *priv)
1392 {
1393         int ret = 0;
1394
1395         /* stop device's busmaster DMA activity */
1396         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
1397
1398         ret = iwl_poll_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_MASTER_DISABLED,
1399                         CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
1400         if (ret)
1401                 IWL_WARN(priv, "Master Disable Timed Out, 100 usec\n");
1402
1403         IWL_DEBUG_INFO(priv, "stop master\n");
1404
1405         return ret;
1406 }
1407 EXPORT_SYMBOL(iwl_apm_stop_master);
1408
1409 void iwl_apm_stop(struct iwl_priv *priv)
1410 {
1411         IWL_DEBUG_INFO(priv, "Stop card, put in low power state\n");
1412
1413         /* Stop device's DMA activity */
1414         iwl_apm_stop_master(priv);
1415
1416         /* Reset the entire device */
1417         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
1418
1419         udelay(10);
1420
1421         /*
1422          * Clear "initialization complete" bit to move adapter from
1423          * D0A* (powered-up Active) --> D0U* (Uninitialized) state.
1424          */
1425         iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1426 }
1427 EXPORT_SYMBOL(iwl_apm_stop);
1428
1429
1430 /*
1431  * Start up NIC's basic functionality after it has been reset
1432  * (e.g. after platform boot, or shutdown via iwl_apm_stop())
1433  * NOTE:  This does not load uCode nor start the embedded processor
1434  */
1435 int iwl_apm_init(struct iwl_priv *priv)
1436 {
1437         int ret = 0;
1438         u16 lctl;
1439
1440         IWL_DEBUG_INFO(priv, "Init card's basic functions\n");
1441
1442         /*
1443          * Use "set_bit" below rather than "write", to preserve any hardware
1444          * bits already set by default after reset.
1445          */
1446
1447         /* Disable L0S exit timer (platform NMI Work/Around) */
1448         iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
1449                           CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
1450
1451         /*
1452          * Disable L0s without affecting L1;
1453          *  don't wait for ICH L0s (ICH bug W/A)
1454          */
1455         iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
1456                           CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
1457
1458         /* Set FH wait threshold to maximum (HW error during stress W/A) */
1459         iwl_set_bit(priv, CSR_DBG_HPET_MEM_REG, CSR_DBG_HPET_MEM_REG_VAL);
1460
1461         /*
1462          * Enable HAP INTA (interrupt from management bus) to
1463          * wake device's PCI Express link L1a -> L0s
1464          * NOTE:  This is no-op for 3945 (non-existant bit)
1465          */
1466         iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1467                                     CSR_HW_IF_CONFIG_REG_BIT_HAP_WAKE_L1A);
1468
1469         /*
1470          * HW bug W/A for instability in PCIe bus L0->L0S->L1 transition.
1471          * Check if BIOS (or OS) enabled L1-ASPM on this device.
1472          * If so (likely), disable L0S, so device moves directly L0->L1;
1473          *    costs negligible amount of power savings.
1474          * If not (unlikely), enable L0S, so there is at least some
1475          *    power savings, even without L1.
1476          */
1477         if (priv->cfg->set_l0s) {
1478                 lctl = iwl_pcie_link_ctl(priv);
1479                 if ((lctl & PCI_CFG_LINK_CTRL_VAL_L1_EN) ==
1480                                         PCI_CFG_LINK_CTRL_VAL_L1_EN) {
1481                         /* L1-ASPM enabled; disable(!) L0S  */
1482                         iwl_set_bit(priv, CSR_GIO_REG,
1483                                         CSR_GIO_REG_VAL_L0S_ENABLED);
1484                         IWL_DEBUG_POWER(priv, "L1 Enabled; Disabling L0S\n");
1485                 } else {
1486                         /* L1-ASPM disabled; enable(!) L0S */
1487                         iwl_clear_bit(priv, CSR_GIO_REG,
1488                                         CSR_GIO_REG_VAL_L0S_ENABLED);
1489                         IWL_DEBUG_POWER(priv, "L1 Disabled; Enabling L0S\n");
1490                 }
1491         }
1492
1493         /* Configure analog phase-lock-loop before activating to D0A */
1494         if (priv->cfg->pll_cfg_val)
1495                 iwl_set_bit(priv, CSR_ANA_PLL_CFG, priv->cfg->pll_cfg_val);
1496
1497         /*
1498          * Set "initialization complete" bit to move adapter from
1499          * D0U* --> D0A* (powered-up active) state.
1500          */
1501         iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1502
1503         /*
1504          * Wait for clock stabilization; once stabilized, access to
1505          * device-internal resources is supported, e.g. iwl_write_prph()
1506          * and accesses to uCode SRAM.
1507          */
1508         ret = iwl_poll_bit(priv, CSR_GP_CNTRL,
1509                         CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
1510                         CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
1511         if (ret < 0) {
1512                 IWL_DEBUG_INFO(priv, "Failed to init the card\n");
1513                 goto out;
1514         }
1515
1516         /*
1517          * Enable DMA and BSM (if used) clocks, wait for them to stabilize.
1518          * BSM (Boostrap State Machine) is only in 3945 and 4965;
1519          * later devices (i.e. 5000 and later) have non-volatile SRAM,
1520          * and don't need BSM to restore data after power-saving sleep.
1521          *
1522          * Write to "CLK_EN_REG"; "1" bits enable clocks, while "0" bits
1523          * do not disable clocks.  This preserves any hardware bits already
1524          * set by default in "CLK_CTRL_REG" after reset.
1525          */
1526         if (priv->cfg->use_bsm)
1527                 iwl_write_prph(priv, APMG_CLK_EN_REG,
1528                         APMG_CLK_VAL_DMA_CLK_RQT | APMG_CLK_VAL_BSM_CLK_RQT);
1529         else
1530                 iwl_write_prph(priv, APMG_CLK_EN_REG,
1531                         APMG_CLK_VAL_DMA_CLK_RQT);
1532         udelay(20);
1533
1534         /* Disable L1-Active */
1535         iwl_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
1536                           APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
1537
1538 out:
1539         return ret;
1540 }
1541 EXPORT_SYMBOL(iwl_apm_init);
1542
1543
1544
1545 void iwl_configure_filter(struct ieee80211_hw *hw,
1546                           unsigned int changed_flags,
1547                           unsigned int *total_flags,
1548                           u64 multicast)
1549 {
1550         struct iwl_priv *priv = hw->priv;
1551         __le32 *filter_flags = &priv->staging_rxon.filter_flags;
1552
1553         IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
1554                         changed_flags, *total_flags);
1555
1556         if (changed_flags & (FIF_OTHER_BSS | FIF_PROMISC_IN_BSS)) {
1557                 if (*total_flags & (FIF_OTHER_BSS | FIF_PROMISC_IN_BSS))
1558                         *filter_flags |= RXON_FILTER_PROMISC_MSK;
1559                 else
1560                         *filter_flags &= ~RXON_FILTER_PROMISC_MSK;
1561         }
1562         if (changed_flags & FIF_ALLMULTI) {
1563                 if (*total_flags & FIF_ALLMULTI)
1564                         *filter_flags |= RXON_FILTER_ACCEPT_GRP_MSK;
1565                 else
1566                         *filter_flags &= ~RXON_FILTER_ACCEPT_GRP_MSK;
1567         }
1568         if (changed_flags & FIF_CONTROL) {
1569                 if (*total_flags & FIF_CONTROL)
1570                         *filter_flags |= RXON_FILTER_CTL2HOST_MSK;
1571                 else
1572                         *filter_flags &= ~RXON_FILTER_CTL2HOST_MSK;
1573         }
1574         if (changed_flags & FIF_BCN_PRBRESP_PROMISC) {
1575                 if (*total_flags & FIF_BCN_PRBRESP_PROMISC)
1576                         *filter_flags |= RXON_FILTER_BCON_AWARE_MSK;
1577                 else
1578                         *filter_flags &= ~RXON_FILTER_BCON_AWARE_MSK;
1579         }
1580
1581         /* We avoid iwl_commit_rxon here to commit the new filter flags
1582          * since mac80211 will call ieee80211_hw_config immediately.
1583          * (mc_list is not supported at this time). Otherwise, we need to
1584          * queue a background iwl_commit_rxon work.
1585          */
1586
1587         *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
1588                         FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
1589 }
1590 EXPORT_SYMBOL(iwl_configure_filter);
1591
1592 int iwl_set_hw_params(struct iwl_priv *priv)
1593 {
1594         priv->hw_params.max_rxq_size = RX_QUEUE_SIZE;
1595         priv->hw_params.max_rxq_log = RX_QUEUE_SIZE_LOG;
1596         if (priv->cfg->mod_params->amsdu_size_8K)
1597                 priv->hw_params.rx_page_order = get_order(IWL_RX_BUF_SIZE_8K);
1598         else
1599                 priv->hw_params.rx_page_order = get_order(IWL_RX_BUF_SIZE_4K);
1600
1601         priv->hw_params.max_beacon_itrvl = IWL_MAX_UCODE_BEACON_INTERVAL;
1602
1603         if (priv->cfg->mod_params->disable_11n)
1604                 priv->cfg->sku &= ~IWL_SKU_N;
1605
1606         /* Device-specific setup */
1607         return priv->cfg->ops->lib->set_hw_params(priv);
1608 }
1609 EXPORT_SYMBOL(iwl_set_hw_params);
1610
1611 int iwl_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force)
1612 {
1613         int ret = 0;
1614         s8 prev_tx_power = priv->tx_power_user_lmt;
1615
1616         if (tx_power < IWL_TX_POWER_TARGET_POWER_MIN) {
1617                 IWL_WARN(priv, "Requested user TXPOWER %d below lower limit %d.\n",
1618                          tx_power,
1619                          IWL_TX_POWER_TARGET_POWER_MIN);
1620                 return -EINVAL;
1621         }
1622
1623         if (tx_power > priv->tx_power_device_lmt) {
1624                 IWL_WARN(priv,
1625                         "Requested user TXPOWER %d above upper limit %d.\n",
1626                          tx_power, priv->tx_power_device_lmt);
1627                 return -EINVAL;
1628         }
1629
1630         if (priv->tx_power_user_lmt != tx_power)
1631                 force = true;
1632
1633         /* if nic is not up don't send command */
1634         if (iwl_is_ready_rf(priv)) {
1635                 priv->tx_power_user_lmt = tx_power;
1636                 if (force && priv->cfg->ops->lib->send_tx_power)
1637                         ret = priv->cfg->ops->lib->send_tx_power(priv);
1638                 else if (!priv->cfg->ops->lib->send_tx_power)
1639                         ret = -EOPNOTSUPP;
1640                 /*
1641                  * if fail to set tx_power, restore the orig. tx power
1642                  */
1643                 if (ret)
1644                         priv->tx_power_user_lmt = prev_tx_power;
1645         }
1646
1647         /*
1648          * Even this is an async host command, the command
1649          * will always report success from uCode
1650          * So once driver can placing the command into the queue
1651          * successfully, driver can use priv->tx_power_user_lmt
1652          * to reflect the current tx power
1653          */
1654         return ret;
1655 }
1656 EXPORT_SYMBOL(iwl_set_tx_power);
1657
1658 #define ICT_COUNT (PAGE_SIZE/sizeof(u32))
1659
1660 /* Free dram table */
1661 void iwl_free_isr_ict(struct iwl_priv *priv)
1662 {
1663         if (priv->ict_tbl_vir) {
1664                 pci_free_consistent(priv->pci_dev, (sizeof(u32) * ICT_COUNT) +
1665                                         PAGE_SIZE, priv->ict_tbl_vir,
1666                                         priv->ict_tbl_dma);
1667                 priv->ict_tbl_vir = NULL;
1668         }
1669 }
1670 EXPORT_SYMBOL(iwl_free_isr_ict);
1671
1672
1673 /* allocate dram shared table it is a PAGE_SIZE aligned
1674  * also reset all data related to ICT table interrupt.
1675  */
1676 int iwl_alloc_isr_ict(struct iwl_priv *priv)
1677 {
1678
1679         if (priv->cfg->use_isr_legacy)
1680                 return 0;
1681         /* allocate shrared data table */
1682         priv->ict_tbl_vir = pci_alloc_consistent(priv->pci_dev, (sizeof(u32) *
1683                                                   ICT_COUNT) + PAGE_SIZE,
1684                                                   &priv->ict_tbl_dma);
1685         if (!priv->ict_tbl_vir)
1686                 return -ENOMEM;
1687
1688         /* align table to PAGE_SIZE boundry */
1689         priv->aligned_ict_tbl_dma = ALIGN(priv->ict_tbl_dma, PAGE_SIZE);
1690
1691         IWL_DEBUG_ISR(priv, "ict dma addr %Lx dma aligned %Lx diff %d\n",
1692                              (unsigned long long)priv->ict_tbl_dma,
1693                              (unsigned long long)priv->aligned_ict_tbl_dma,
1694                         (int)(priv->aligned_ict_tbl_dma - priv->ict_tbl_dma));
1695
1696         priv->ict_tbl =  priv->ict_tbl_vir +
1697                           (priv->aligned_ict_tbl_dma - priv->ict_tbl_dma);
1698
1699         IWL_DEBUG_ISR(priv, "ict vir addr %p vir aligned %p diff %d\n",
1700                              priv->ict_tbl, priv->ict_tbl_vir,
1701                         (int)(priv->aligned_ict_tbl_dma - priv->ict_tbl_dma));
1702
1703         /* reset table and index to all 0 */
1704         memset(priv->ict_tbl_vir,0, (sizeof(u32) * ICT_COUNT) + PAGE_SIZE);
1705         priv->ict_index = 0;
1706
1707         /* add periodic RX interrupt */
1708         priv->inta_mask |= CSR_INT_BIT_RX_PERIODIC;
1709         return 0;
1710 }
1711 EXPORT_SYMBOL(iwl_alloc_isr_ict);
1712
1713 /* Device is going up inform it about using ICT interrupt table,
1714  * also we need to tell the driver to start using ICT interrupt.
1715  */
1716 int iwl_reset_ict(struct iwl_priv *priv)
1717 {
1718         u32 val;
1719         unsigned long flags;
1720
1721         if (!priv->ict_tbl_vir)
1722                 return 0;
1723
1724         spin_lock_irqsave(&priv->lock, flags);
1725         iwl_disable_interrupts(priv);
1726
1727         memset(&priv->ict_tbl[0], 0, sizeof(u32) * ICT_COUNT);
1728
1729         val = priv->aligned_ict_tbl_dma >> PAGE_SHIFT;
1730
1731         val |= CSR_DRAM_INT_TBL_ENABLE;
1732         val |= CSR_DRAM_INIT_TBL_WRAP_CHECK;
1733
1734         IWL_DEBUG_ISR(priv, "CSR_DRAM_INT_TBL_REG =0x%X "
1735                         "aligned dma address %Lx\n",
1736                         val, (unsigned long long)priv->aligned_ict_tbl_dma);
1737
1738         iwl_write32(priv, CSR_DRAM_INT_TBL_REG, val);
1739         priv->use_ict = true;
1740         priv->ict_index = 0;
1741         iwl_write32(priv, CSR_INT, priv->inta_mask);
1742         iwl_enable_interrupts(priv);
1743         spin_unlock_irqrestore(&priv->lock, flags);
1744
1745         return 0;
1746 }
1747 EXPORT_SYMBOL(iwl_reset_ict);
1748
1749 /* Device is going down disable ict interrupt usage */
1750 void iwl_disable_ict(struct iwl_priv *priv)
1751 {
1752         unsigned long flags;
1753
1754         spin_lock_irqsave(&priv->lock, flags);
1755         priv->use_ict = false;
1756         spin_unlock_irqrestore(&priv->lock, flags);
1757 }
1758 EXPORT_SYMBOL(iwl_disable_ict);
1759
1760 /* interrupt handler using ict table, with this interrupt driver will
1761  * stop using INTA register to get device's interrupt, reading this register
1762  * is expensive, device will write interrupts in ICT dram table, increment
1763  * index then will fire interrupt to driver, driver will OR all ICT table
1764  * entries from current index up to table entry with 0 value. the result is
1765  * the interrupt we need to service, driver will set the entries back to 0 and
1766  * set index.
1767  */
1768 irqreturn_t iwl_isr_ict(int irq, void *data)
1769 {
1770         struct iwl_priv *priv = data;
1771         u32 inta, inta_mask;
1772         u32 val = 0;
1773
1774         if (!priv)
1775                 return IRQ_NONE;
1776
1777         /* dram interrupt table not set yet,
1778          * use legacy interrupt.
1779          */
1780         if (!priv->use_ict)
1781                 return iwl_isr(irq, data);
1782
1783         spin_lock(&priv->lock);
1784
1785         /* Disable (but don't clear!) interrupts here to avoid
1786          * back-to-back ISRs and sporadic interrupts from our NIC.
1787          * If we have something to service, the tasklet will re-enable ints.
1788          * If we *don't* have something, we'll re-enable before leaving here.
1789          */
1790         inta_mask = iwl_read32(priv, CSR_INT_MASK);  /* just for debug */
1791         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
1792
1793
1794         /* Ignore interrupt if there's nothing in NIC to service.
1795          * This may be due to IRQ shared with another device,
1796          * or due to sporadic interrupts thrown from our NIC. */
1797         if (!priv->ict_tbl[priv->ict_index]) {
1798                 IWL_DEBUG_ISR(priv, "Ignore interrupt, inta == 0\n");
1799                 goto none;
1800         }
1801
1802         /* read all entries that not 0 start with ict_index */
1803         while (priv->ict_tbl[priv->ict_index]) {
1804
1805                 val |= le32_to_cpu(priv->ict_tbl[priv->ict_index]);
1806                 IWL_DEBUG_ISR(priv, "ICT index %d value 0x%08X\n",
1807                                 priv->ict_index,
1808                                 le32_to_cpu(priv->ict_tbl[priv->ict_index]));
1809                 priv->ict_tbl[priv->ict_index] = 0;
1810                 priv->ict_index = iwl_queue_inc_wrap(priv->ict_index,
1811                                                      ICT_COUNT);
1812
1813         }
1814
1815         /* We should not get this value, just ignore it. */
1816         if (val == 0xffffffff)
1817                 val = 0;
1818
1819         inta = (0xff & val) | ((0xff00 & val) << 16);
1820         IWL_DEBUG_ISR(priv, "ISR inta 0x%08x, enabled 0x%08x ict 0x%08x\n",
1821                         inta, inta_mask, val);
1822
1823         inta &= priv->inta_mask;
1824         priv->inta |= inta;
1825
1826         /* iwl_irq_tasklet() will service interrupts and re-enable them */
1827         if (likely(inta))
1828                 tasklet_schedule(&priv->irq_tasklet);
1829         else if (test_bit(STATUS_INT_ENABLED, &priv->status) && !priv->inta) {
1830                 /* Allow interrupt if was disabled by this handler and
1831                  * no tasklet was schedules, We should not enable interrupt,
1832                  * tasklet will enable it.
1833                  */
1834                 iwl_enable_interrupts(priv);
1835         }
1836
1837         spin_unlock(&priv->lock);
1838         return IRQ_HANDLED;
1839
1840  none:
1841         /* re-enable interrupts here since we don't have anything to service.
1842          * only Re-enable if disabled by irq.
1843          */
1844         if (test_bit(STATUS_INT_ENABLED, &priv->status) && !priv->inta)
1845                 iwl_enable_interrupts(priv);
1846
1847         spin_unlock(&priv->lock);
1848         return IRQ_NONE;
1849 }
1850 EXPORT_SYMBOL(iwl_isr_ict);
1851
1852
1853 static irqreturn_t iwl_isr(int irq, void *data)
1854 {
1855         struct iwl_priv *priv = data;
1856         u32 inta, inta_mask;
1857 #ifdef CONFIG_IWLWIFI_DEBUG
1858         u32 inta_fh;
1859 #endif
1860         if (!priv)
1861                 return IRQ_NONE;
1862
1863         spin_lock(&priv->lock);
1864
1865         /* Disable (but don't clear!) interrupts here to avoid
1866          *    back-to-back ISRs and sporadic interrupts from our NIC.
1867          * If we have something to service, the tasklet will re-enable ints.
1868          * If we *don't* have something, we'll re-enable before leaving here. */
1869         inta_mask = iwl_read32(priv, CSR_INT_MASK);  /* just for debug */
1870         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
1871
1872         /* Discover which interrupts are active/pending */
1873         inta = iwl_read32(priv, CSR_INT);
1874
1875         /* Ignore interrupt if there's nothing in NIC to service.
1876          * This may be due to IRQ shared with another device,
1877          * or due to sporadic interrupts thrown from our NIC. */
1878         if (!inta) {
1879                 IWL_DEBUG_ISR(priv, "Ignore interrupt, inta == 0\n");
1880                 goto none;
1881         }
1882
1883         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
1884                 /* Hardware disappeared. It might have already raised
1885                  * an interrupt */
1886                 IWL_WARN(priv, "HARDWARE GONE?? INTA == 0x%08x\n", inta);
1887                 goto unplugged;
1888         }
1889
1890 #ifdef CONFIG_IWLWIFI_DEBUG
1891         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1892                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1893                 IWL_DEBUG_ISR(priv, "ISR inta 0x%08x, enabled 0x%08x, "
1894                               "fh 0x%08x\n", inta, inta_mask, inta_fh);
1895         }
1896 #endif
1897
1898         priv->inta |= inta;
1899         /* iwl_irq_tasklet() will service interrupts and re-enable them */
1900         if (likely(inta))
1901                 tasklet_schedule(&priv->irq_tasklet);
1902         else if (test_bit(STATUS_INT_ENABLED, &priv->status) && !priv->inta)
1903                 iwl_enable_interrupts(priv);
1904
1905  unplugged:
1906         spin_unlock(&priv->lock);
1907         return IRQ_HANDLED;
1908
1909  none:
1910         /* re-enable interrupts here since we don't have anything to service. */
1911         /* only Re-enable if diabled by irq  and no schedules tasklet. */
1912         if (test_bit(STATUS_INT_ENABLED, &priv->status) && !priv->inta)
1913                 iwl_enable_interrupts(priv);
1914
1915         spin_unlock(&priv->lock);
1916         return IRQ_NONE;
1917 }
1918
1919 irqreturn_t iwl_isr_legacy(int irq, void *data)
1920 {
1921         struct iwl_priv *priv = data;
1922         u32 inta, inta_mask;
1923         u32 inta_fh;
1924         if (!priv)
1925                 return IRQ_NONE;
1926
1927         spin_lock(&priv->lock);
1928
1929         /* Disable (but don't clear!) interrupts here to avoid
1930          *    back-to-back ISRs and sporadic interrupts from our NIC.
1931          * If we have something to service, the tasklet will re-enable ints.
1932          * If we *don't* have something, we'll re-enable before leaving here. */
1933         inta_mask = iwl_read32(priv, CSR_INT_MASK);  /* just for debug */
1934         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
1935
1936         /* Discover which interrupts are active/pending */
1937         inta = iwl_read32(priv, CSR_INT);
1938         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1939
1940         /* Ignore interrupt if there's nothing in NIC to service.
1941          * This may be due to IRQ shared with another device,
1942          * or due to sporadic interrupts thrown from our NIC. */
1943         if (!inta && !inta_fh) {
1944                 IWL_DEBUG_ISR(priv, "Ignore interrupt, inta == 0, inta_fh == 0\n");
1945                 goto none;
1946         }
1947
1948         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
1949                 /* Hardware disappeared. It might have already raised
1950                  * an interrupt */
1951                 IWL_WARN(priv, "HARDWARE GONE?? INTA == 0x%08x\n", inta);
1952                 goto unplugged;
1953         }
1954
1955         IWL_DEBUG_ISR(priv, "ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1956                       inta, inta_mask, inta_fh);
1957
1958         inta &= ~CSR_INT_BIT_SCD;
1959
1960         /* iwl_irq_tasklet() will service interrupts and re-enable them */
1961         if (likely(inta || inta_fh))
1962                 tasklet_schedule(&priv->irq_tasklet);
1963
1964  unplugged:
1965         spin_unlock(&priv->lock);
1966         return IRQ_HANDLED;
1967
1968  none:
1969         /* re-enable interrupts here since we don't have anything to service. */
1970         /* only Re-enable if diabled by irq */
1971         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1972                 iwl_enable_interrupts(priv);
1973         spin_unlock(&priv->lock);
1974         return IRQ_NONE;
1975 }
1976 EXPORT_SYMBOL(iwl_isr_legacy);
1977
1978 int iwl_send_bt_config(struct iwl_priv *priv)
1979 {
1980         struct iwl_bt_cmd bt_cmd = {
1981                 .flags = BT_COEX_MODE_4W,
1982                 .lead_time = BT_LEAD_TIME_DEF,
1983                 .max_kill = BT_MAX_KILL_DEF,
1984                 .kill_ack_mask = 0,
1985                 .kill_cts_mask = 0,
1986         };
1987
1988         return iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG,
1989                                 sizeof(struct iwl_bt_cmd), &bt_cmd);
1990 }
1991 EXPORT_SYMBOL(iwl_send_bt_config);
1992
1993 int iwl_send_statistics_request(struct iwl_priv *priv, u8 flags)
1994 {
1995         u32 stat_flags = 0;
1996         struct iwl_host_cmd cmd = {
1997                 .id = REPLY_STATISTICS_CMD,
1998                 .flags = flags,
1999                 .len = sizeof(stat_flags),
2000                 .data = (u8 *) &stat_flags,
2001         };
2002         return iwl_send_cmd(priv, &cmd);
2003 }
2004 EXPORT_SYMBOL(iwl_send_statistics_request);
2005
2006 /**
2007  * iwl_verify_inst_sparse - verify runtime uCode image in card vs. host,
2008  *   using sample data 100 bytes apart.  If these sample points are good,
2009  *   it's a pretty good bet that everything between them is good, too.
2010  */
2011 static int iwlcore_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
2012 {
2013         u32 val;
2014         int ret = 0;
2015         u32 errcnt = 0;
2016         u32 i;
2017
2018         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
2019
2020         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
2021                 /* read data comes through single port, auto-incr addr */
2022                 /* NOTE: Use the debugless read so we don't flood kernel log
2023                  * if IWL_DL_IO is set */
2024                 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
2025                         i + IWL49_RTC_INST_LOWER_BOUND);
2026                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
2027                 if (val != le32_to_cpu(*image)) {
2028                         ret = -EIO;
2029                         errcnt++;
2030                         if (errcnt >= 3)
2031                                 break;
2032                 }
2033         }
2034
2035         return ret;
2036 }
2037
2038 /**
2039  * iwlcore_verify_inst_full - verify runtime uCode image in card vs. host,
2040  *     looking at all data.
2041  */
2042 static int iwl_verify_inst_full(struct iwl_priv *priv, __le32 *image,
2043                                  u32 len)
2044 {
2045         u32 val;
2046         u32 save_len = len;
2047         int ret = 0;
2048         u32 errcnt;
2049
2050         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
2051
2052         iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
2053                            IWL49_RTC_INST_LOWER_BOUND);
2054
2055         errcnt = 0;
2056         for (; len > 0; len -= sizeof(u32), image++) {
2057                 /* read data comes through single port, auto-incr addr */
2058                 /* NOTE: Use the debugless read so we don't flood kernel log
2059                  * if IWL_DL_IO is set */
2060                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
2061                 if (val != le32_to_cpu(*image)) {
2062                         IWL_ERR(priv, "uCode INST section is invalid at "
2063                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
2064                                   save_len - len, val, le32_to_cpu(*image));
2065                         ret = -EIO;
2066                         errcnt++;
2067                         if (errcnt >= 20)
2068                                 break;
2069                 }
2070         }
2071
2072         if (!errcnt)
2073                 IWL_DEBUG_INFO(priv,
2074                     "ucode image in INSTRUCTION memory is good\n");
2075
2076         return ret;
2077 }
2078
2079 /**
2080  * iwl_verify_ucode - determine which instruction image is in SRAM,
2081  *    and verify its contents
2082  */
2083 int iwl_verify_ucode(struct iwl_priv *priv)
2084 {
2085         __le32 *image;
2086         u32 len;
2087         int ret;
2088
2089         /* Try bootstrap */
2090         image = (__le32 *)priv->ucode_boot.v_addr;
2091         len = priv->ucode_boot.len;
2092         ret = iwlcore_verify_inst_sparse(priv, image, len);
2093         if (!ret) {
2094                 IWL_DEBUG_INFO(priv, "Bootstrap uCode is good in inst SRAM\n");
2095                 return 0;
2096         }
2097
2098         /* Try initialize */
2099         image = (__le32 *)priv->ucode_init.v_addr;
2100         len = priv->ucode_init.len;
2101         ret = iwlcore_verify_inst_sparse(priv, image, len);
2102         if (!ret) {
2103                 IWL_DEBUG_INFO(priv, "Initialize uCode is good in inst SRAM\n");
2104                 return 0;
2105         }
2106
2107         /* Try runtime/protocol */
2108         image = (__le32 *)priv->ucode_code.v_addr;
2109         len = priv->ucode_code.len;
2110         ret = iwlcore_verify_inst_sparse(priv, image, len);
2111         if (!ret) {
2112                 IWL_DEBUG_INFO(priv, "Runtime uCode is good in inst SRAM\n");
2113                 return 0;
2114         }
2115
2116         IWL_ERR(priv, "NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
2117
2118         /* Since nothing seems to match, show first several data entries in
2119          * instruction SRAM, so maybe visual inspection will give a clue.
2120          * Selection of bootstrap image (vs. other images) is arbitrary. */
2121         image = (__le32 *)priv->ucode_boot.v_addr;
2122         len = priv->ucode_boot.len;
2123         ret = iwl_verify_inst_full(priv, image, len);
2124
2125         return ret;
2126 }
2127 EXPORT_SYMBOL(iwl_verify_ucode);
2128
2129
2130 void iwl_rf_kill_ct_config(struct iwl_priv *priv)
2131 {
2132         struct iwl_ct_kill_config cmd;
2133         struct iwl_ct_kill_throttling_config adv_cmd;
2134         unsigned long flags;
2135         int ret = 0;
2136
2137         spin_lock_irqsave(&priv->lock, flags);
2138         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
2139                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
2140         spin_unlock_irqrestore(&priv->lock, flags);
2141         priv->thermal_throttle.ct_kill_toggle = false;
2142
2143         if (priv->cfg->support_ct_kill_exit) {
2144                 adv_cmd.critical_temperature_enter =
2145                         cpu_to_le32(priv->hw_params.ct_kill_threshold);
2146                 adv_cmd.critical_temperature_exit =
2147                         cpu_to_le32(priv->hw_params.ct_kill_exit_threshold);
2148
2149                 ret = iwl_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD,
2150                                        sizeof(adv_cmd), &adv_cmd);
2151                 if (ret)
2152                         IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
2153                 else
2154                         IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
2155                                         "succeeded, "
2156                                         "critical temperature enter is %d,"
2157                                         "exit is %d\n",
2158                                        priv->hw_params.ct_kill_threshold,
2159                                        priv->hw_params.ct_kill_exit_threshold);
2160         } else {
2161                 cmd.critical_temperature_R =
2162                         cpu_to_le32(priv->hw_params.ct_kill_threshold);
2163
2164                 ret = iwl_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD,
2165                                        sizeof(cmd), &cmd);
2166                 if (ret)
2167                         IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
2168                 else
2169                         IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
2170                                         "succeeded, "
2171                                         "critical temperature is %d\n",
2172                                         priv->hw_params.ct_kill_threshold);
2173         }
2174 }
2175 EXPORT_SYMBOL(iwl_rf_kill_ct_config);
2176
2177
2178 /*
2179  * CARD_STATE_CMD
2180  *
2181  * Use: Sets the device's internal card state to enable, disable, or halt
2182  *
2183  * When in the 'enable' state the card operates as normal.
2184  * When in the 'disable' state, the card enters into a low power mode.
2185  * When in the 'halt' state, the card is shut down and must be fully
2186  * restarted to come back on.
2187  */
2188 int iwl_send_card_state(struct iwl_priv *priv, u32 flags, u8 meta_flag)
2189 {
2190         struct iwl_host_cmd cmd = {
2191                 .id = REPLY_CARD_STATE_CMD,
2192                 .len = sizeof(u32),
2193                 .data = &flags,
2194                 .flags = meta_flag,
2195         };
2196
2197         return iwl_send_cmd(priv, &cmd);
2198 }
2199
2200 void iwl_rx_pm_sleep_notif(struct iwl_priv *priv,
2201                            struct iwl_rx_mem_buffer *rxb)
2202 {
2203 #ifdef CONFIG_IWLWIFI_DEBUG
2204         struct iwl_rx_packet *pkt = rxb_addr(rxb);
2205         struct iwl_sleep_notification *sleep = &(pkt->u.sleep_notif);
2206         IWL_DEBUG_RX(priv, "sleep mode: %d, src: %d\n",
2207                      sleep->pm_sleep_mode, sleep->pm_wakeup_src);
2208 #endif
2209 }
2210 EXPORT_SYMBOL(iwl_rx_pm_sleep_notif);
2211
2212 void iwl_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
2213                                       struct iwl_rx_mem_buffer *rxb)
2214 {
2215         struct iwl_rx_packet *pkt = rxb_addr(rxb);
2216         u32 len = le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
2217         IWL_DEBUG_RADIO(priv, "Dumping %d bytes of unhandled "
2218                         "notification for %s:\n", len,
2219                         get_cmd_string(pkt->hdr.cmd));
2220         iwl_print_hex_dump(priv, IWL_DL_RADIO, pkt->u.raw, len);
2221 }
2222 EXPORT_SYMBOL(iwl_rx_pm_debug_statistics_notif);
2223
2224 void iwl_rx_reply_error(struct iwl_priv *priv,
2225                         struct iwl_rx_mem_buffer *rxb)
2226 {
2227         struct iwl_rx_packet *pkt = rxb_addr(rxb);
2228
2229         IWL_ERR(priv, "Error Reply type 0x%08X cmd %s (0x%02X) "
2230                 "seq 0x%04X ser 0x%08X\n",
2231                 le32_to_cpu(pkt->u.err_resp.error_type),
2232                 get_cmd_string(pkt->u.err_resp.cmd_id),
2233                 pkt->u.err_resp.cmd_id,
2234                 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
2235                 le32_to_cpu(pkt->u.err_resp.error_info));
2236 }
2237 EXPORT_SYMBOL(iwl_rx_reply_error);
2238
2239 void iwl_clear_isr_stats(struct iwl_priv *priv)
2240 {
2241         memset(&priv->isr_stats, 0, sizeof(priv->isr_stats));
2242 }
2243
2244 int iwl_mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
2245                            const struct ieee80211_tx_queue_params *params)
2246 {
2247         struct iwl_priv *priv = hw->priv;
2248         unsigned long flags;
2249         int q;
2250
2251         IWL_DEBUG_MAC80211(priv, "enter\n");
2252
2253         if (!iwl_is_ready_rf(priv)) {
2254                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
2255                 return -EIO;
2256         }
2257
2258         if (queue >= AC_NUM) {
2259                 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
2260                 return 0;
2261         }
2262
2263         q = AC_NUM - 1 - queue;
2264
2265         spin_lock_irqsave(&priv->lock, flags);
2266
2267         priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
2268         priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
2269         priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
2270         priv->qos_data.def_qos_parm.ac[q].edca_txop =
2271                         cpu_to_le16((params->txop * 32));
2272
2273         priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
2274         priv->qos_data.qos_active = 1;
2275
2276         if (priv->iw_mode == NL80211_IFTYPE_AP)
2277                 iwl_activate_qos(priv, 1);
2278         else if (priv->assoc_id && iwl_is_associated(priv))
2279                 iwl_activate_qos(priv, 0);
2280
2281         spin_unlock_irqrestore(&priv->lock, flags);
2282
2283         IWL_DEBUG_MAC80211(priv, "leave\n");
2284         return 0;
2285 }
2286 EXPORT_SYMBOL(iwl_mac_conf_tx);
2287
2288 static void iwl_ht_conf(struct iwl_priv *priv,
2289                         struct ieee80211_bss_conf *bss_conf)
2290 {
2291         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
2292         struct ieee80211_sta *sta;
2293
2294         IWL_DEBUG_MAC80211(priv, "enter: \n");
2295
2296         if (!ht_conf->is_ht)
2297                 return;
2298
2299         ht_conf->ht_protection =
2300                 bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_PROTECTION;
2301         ht_conf->non_GF_STA_present =
2302                 !!(bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
2303
2304         ht_conf->single_chain_sufficient = false;
2305
2306         switch (priv->iw_mode) {
2307         case NL80211_IFTYPE_STATION:
2308                 rcu_read_lock();
2309                 sta = ieee80211_find_sta(priv->vif, priv->bssid);
2310                 if (sta) {
2311                         struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
2312                         int maxstreams;
2313
2314                         maxstreams = (ht_cap->mcs.tx_params &
2315                                       IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK)
2316                                         >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
2317                         maxstreams += 1;
2318
2319                         ht_conf->sm_ps =
2320                                 (u8)((ht_cap->cap & IEEE80211_HT_CAP_SM_PS)
2321                                 >> 2);
2322                         IWL_DEBUG_MAC80211(priv, "sm_ps: 0x%x\n",
2323                                 ht_conf->sm_ps);
2324
2325                         if ((ht_cap->mcs.rx_mask[1] == 0) &&
2326                             (ht_cap->mcs.rx_mask[2] == 0))
2327                                 ht_conf->single_chain_sufficient = true;
2328                         if (maxstreams <= 1)
2329                                 ht_conf->single_chain_sufficient = true;
2330                 } else {
2331                         /*
2332                          * If at all, this can only happen through a race
2333                          * when the AP disconnects us while we're still
2334                          * setting up the connection, in that case mac80211
2335                          * will soon tell us about that.
2336                          */
2337                         ht_conf->single_chain_sufficient = true;
2338                 }
2339                 rcu_read_unlock();
2340                 break;
2341         case NL80211_IFTYPE_ADHOC:
2342                 ht_conf->single_chain_sufficient = true;
2343                 break;
2344         default:
2345                 break;
2346         }
2347
2348         IWL_DEBUG_MAC80211(priv, "leave\n");
2349 }
2350
2351 #define IWL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6)
2352 void iwl_bss_info_changed(struct ieee80211_hw *hw,
2353                           struct ieee80211_vif *vif,
2354                           struct ieee80211_bss_conf *bss_conf,
2355                           u32 changes)
2356 {
2357         struct iwl_priv *priv = hw->priv;
2358         int ret;
2359
2360         IWL_DEBUG_MAC80211(priv, "changes = 0x%X\n", changes);
2361
2362         if (!iwl_is_alive(priv))
2363                 return;
2364
2365         mutex_lock(&priv->mutex);
2366
2367         if (changes & BSS_CHANGED_BEACON &&
2368             priv->iw_mode == NL80211_IFTYPE_AP) {
2369                 dev_kfree_skb(priv->ibss_beacon);
2370                 priv->ibss_beacon = ieee80211_beacon_get(hw, vif);
2371         }
2372
2373         if (changes & BSS_CHANGED_BEACON_INT) {
2374                 priv->beacon_int = bss_conf->beacon_int;
2375                 /* TODO: in AP mode, do something to make this take effect */
2376         }
2377
2378         if (changes & BSS_CHANGED_BSSID) {
2379                 IWL_DEBUG_MAC80211(priv, "BSSID %pM\n", bss_conf->bssid);
2380
2381                 /*
2382                  * If there is currently a HW scan going on in the
2383                  * background then we need to cancel it else the RXON
2384                  * below/in post_associate will fail.
2385                  */
2386                 if (iwl_scan_cancel_timeout(priv, 100)) {
2387                         IWL_WARN(priv, "Aborted scan still in progress after 100ms\n");
2388                         IWL_DEBUG_MAC80211(priv, "leaving - scan abort failed.\n");
2389                         mutex_unlock(&priv->mutex);
2390                         return;
2391                 }
2392
2393                 /* mac80211 only sets assoc when in STATION mode */
2394                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC ||
2395                     bss_conf->assoc) {
2396                         memcpy(priv->staging_rxon.bssid_addr,
2397                                bss_conf->bssid, ETH_ALEN);
2398
2399                         /* currently needed in a few places */
2400                         memcpy(priv->bssid, bss_conf->bssid, ETH_ALEN);
2401                 } else {
2402                         priv->staging_rxon.filter_flags &=
2403                                 ~RXON_FILTER_ASSOC_MSK;
2404                 }
2405
2406         }
2407
2408         /*
2409          * This needs to be after setting the BSSID in case
2410          * mac80211 decides to do both changes at once because
2411          * it will invoke post_associate.
2412          */
2413         if (priv->iw_mode == NL80211_IFTYPE_ADHOC &&
2414             changes & BSS_CHANGED_BEACON) {
2415                 struct sk_buff *beacon = ieee80211_beacon_get(hw, vif);
2416
2417                 if (beacon)
2418                         iwl_mac_beacon_update(hw, beacon);
2419         }
2420
2421         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
2422                 IWL_DEBUG_MAC80211(priv, "ERP_PREAMBLE %d\n",
2423                                    bss_conf->use_short_preamble);
2424                 if (bss_conf->use_short_preamble)
2425                         priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2426                 else
2427                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2428         }
2429
2430         if (changes & BSS_CHANGED_ERP_CTS_PROT) {
2431                 IWL_DEBUG_MAC80211(priv, "ERP_CTS %d\n", bss_conf->use_cts_prot);
2432                 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
2433                         priv->staging_rxon.flags |= RXON_FLG_TGG_PROTECT_MSK;
2434                 else
2435                         priv->staging_rxon.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
2436         }
2437
2438         if (changes & BSS_CHANGED_BASIC_RATES) {
2439                 /* XXX use this information
2440                  *
2441                  * To do that, remove code from iwl_set_rate() and put something
2442                  * like this here:
2443                  *
2444                 if (A-band)
2445                         priv->staging_rxon.ofdm_basic_rates =
2446                                 bss_conf->basic_rates;
2447                 else
2448                         priv->staging_rxon.ofdm_basic_rates =
2449                                 bss_conf->basic_rates >> 4;
2450                         priv->staging_rxon.cck_basic_rates =
2451                                 bss_conf->basic_rates & 0xF;
2452                  */
2453         }
2454
2455         if (changes & BSS_CHANGED_HT) {
2456                 iwl_ht_conf(priv, bss_conf);
2457
2458                 if (priv->cfg->ops->hcmd->set_rxon_chain)
2459                         priv->cfg->ops->hcmd->set_rxon_chain(priv);
2460         }
2461
2462         if (changes & BSS_CHANGED_ASSOC) {
2463                 IWL_DEBUG_MAC80211(priv, "ASSOC %d\n", bss_conf->assoc);
2464                 if (bss_conf->assoc) {
2465                         priv->assoc_id = bss_conf->aid;
2466                         priv->beacon_int = bss_conf->beacon_int;
2467                         priv->timestamp = bss_conf->timestamp;
2468                         priv->assoc_capability = bss_conf->assoc_capability;
2469
2470                         iwl_led_associate(priv);
2471
2472                         /*
2473                          * We have just associated, don't start scan too early
2474                          * leave time for EAPOL exchange to complete.
2475                          *
2476                          * XXX: do this in mac80211
2477                          */
2478                         priv->next_scan_jiffies = jiffies +
2479                                         IWL_DELAY_NEXT_SCAN_AFTER_ASSOC;
2480                         if (!iwl_is_rfkill(priv))
2481                                 priv->cfg->ops->lib->post_associate(priv);
2482                 } else {
2483                         priv->assoc_id = 0;
2484                         iwl_led_disassociate(priv);
2485                 }
2486         }
2487
2488         if (changes && iwl_is_associated(priv) && priv->assoc_id) {
2489                 IWL_DEBUG_MAC80211(priv, "Changes (%#x) while associated\n",
2490                                    changes);
2491                 ret = iwl_send_rxon_assoc(priv);
2492                 if (!ret) {
2493                         /* Sync active_rxon with latest change. */
2494                         memcpy((void *)&priv->active_rxon,
2495                                 &priv->staging_rxon,
2496                                 sizeof(struct iwl_rxon_cmd));
2497                 }
2498         }
2499
2500         mutex_unlock(&priv->mutex);
2501
2502         IWL_DEBUG_MAC80211(priv, "leave\n");
2503 }
2504 EXPORT_SYMBOL(iwl_bss_info_changed);
2505
2506 int iwl_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb)
2507 {
2508         struct iwl_priv *priv = hw->priv;
2509         unsigned long flags;
2510         __le64 timestamp;
2511
2512         IWL_DEBUG_MAC80211(priv, "enter\n");
2513
2514         if (!iwl_is_ready_rf(priv)) {
2515                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
2516                 return -EIO;
2517         }
2518
2519         if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
2520                 IWL_DEBUG_MAC80211(priv, "leave - not IBSS\n");
2521                 return -EIO;
2522         }
2523
2524         spin_lock_irqsave(&priv->lock, flags);
2525
2526         if (priv->ibss_beacon)
2527                 dev_kfree_skb(priv->ibss_beacon);
2528
2529         priv->ibss_beacon = skb;
2530
2531         priv->assoc_id = 0;
2532         timestamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
2533         priv->timestamp = le64_to_cpu(timestamp);
2534
2535         IWL_DEBUG_MAC80211(priv, "leave\n");
2536         spin_unlock_irqrestore(&priv->lock, flags);
2537
2538         iwl_reset_qos(priv);
2539
2540         priv->cfg->ops->lib->post_associate(priv);
2541
2542
2543         return 0;
2544 }
2545 EXPORT_SYMBOL(iwl_mac_beacon_update);
2546
2547 int iwl_set_mode(struct iwl_priv *priv, int mode)
2548 {
2549         if (mode == NL80211_IFTYPE_ADHOC) {
2550                 const struct iwl_channel_info *ch_info;
2551
2552                 ch_info = iwl_get_channel_info(priv,
2553                         priv->band,
2554                         le16_to_cpu(priv->staging_rxon.channel));
2555
2556                 if (!ch_info || !is_channel_ibss(ch_info)) {
2557                         IWL_ERR(priv, "channel %d not IBSS channel\n",
2558                                   le16_to_cpu(priv->staging_rxon.channel));
2559                         return -EINVAL;
2560                 }
2561         }
2562
2563         iwl_connection_init_rx_config(priv, mode);
2564
2565         if (priv->cfg->ops->hcmd->set_rxon_chain)
2566                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
2567
2568         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2569
2570         iwl_clear_stations_table(priv);
2571
2572         /* dont commit rxon if rf-kill is on*/
2573         if (!iwl_is_ready_rf(priv))
2574                 return -EAGAIN;
2575
2576         iwlcore_commit_rxon(priv);
2577
2578         return 0;
2579 }
2580 EXPORT_SYMBOL(iwl_set_mode);
2581
2582 int iwl_mac_add_interface(struct ieee80211_hw *hw,
2583                                  struct ieee80211_if_init_conf *conf)
2584 {
2585         struct iwl_priv *priv = hw->priv;
2586         unsigned long flags;
2587
2588         IWL_DEBUG_MAC80211(priv, "enter: type %d\n", conf->type);
2589
2590         if (priv->vif) {
2591                 IWL_DEBUG_MAC80211(priv, "leave - vif != NULL\n");
2592                 return -EOPNOTSUPP;
2593         }
2594
2595         spin_lock_irqsave(&priv->lock, flags);
2596         priv->vif = conf->vif;
2597         priv->iw_mode = conf->type;
2598
2599         spin_unlock_irqrestore(&priv->lock, flags);
2600
2601         mutex_lock(&priv->mutex);
2602
2603         if (conf->mac_addr) {
2604                 IWL_DEBUG_MAC80211(priv, "Set %pM\n", conf->mac_addr);
2605                 memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
2606         }
2607
2608         if (iwl_set_mode(priv, conf->type) == -EAGAIN)
2609                 /* we are not ready, will run again when ready */
2610                 set_bit(STATUS_MODE_PENDING, &priv->status);
2611
2612         mutex_unlock(&priv->mutex);
2613
2614         IWL_DEBUG_MAC80211(priv, "leave\n");
2615         return 0;
2616 }
2617 EXPORT_SYMBOL(iwl_mac_add_interface);
2618
2619 void iwl_mac_remove_interface(struct ieee80211_hw *hw,
2620                                      struct ieee80211_if_init_conf *conf)
2621 {
2622         struct iwl_priv *priv = hw->priv;
2623
2624         IWL_DEBUG_MAC80211(priv, "enter\n");
2625
2626         mutex_lock(&priv->mutex);
2627
2628         if (iwl_is_ready_rf(priv)) {
2629                 iwl_scan_cancel_timeout(priv, 100);
2630                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2631                 iwlcore_commit_rxon(priv);
2632         }
2633         if (priv->vif == conf->vif) {
2634                 priv->vif = NULL;
2635                 memset(priv->bssid, 0, ETH_ALEN);
2636         }
2637         mutex_unlock(&priv->mutex);
2638
2639         IWL_DEBUG_MAC80211(priv, "leave\n");
2640
2641 }
2642 EXPORT_SYMBOL(iwl_mac_remove_interface);
2643
2644 /**
2645  * iwl_mac_config - mac80211 config callback
2646  *
2647  * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
2648  * be set inappropriately and the driver currently sets the hardware up to
2649  * use it whenever needed.
2650  */
2651 int iwl_mac_config(struct ieee80211_hw *hw, u32 changed)
2652 {
2653         struct iwl_priv *priv = hw->priv;
2654         const struct iwl_channel_info *ch_info;
2655         struct ieee80211_conf *conf = &hw->conf;
2656         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
2657         unsigned long flags = 0;
2658         int ret = 0;
2659         u16 ch;
2660         int scan_active = 0;
2661
2662         mutex_lock(&priv->mutex);
2663
2664         IWL_DEBUG_MAC80211(priv, "enter to channel %d changed 0x%X\n",
2665                                         conf->channel->hw_value, changed);
2666
2667         if (unlikely(!priv->cfg->mod_params->disable_hw_scan &&
2668                         test_bit(STATUS_SCANNING, &priv->status))) {
2669                 scan_active = 1;
2670                 IWL_DEBUG_MAC80211(priv, "leave - scanning\n");
2671         }
2672
2673
2674         /* during scanning mac80211 will delay channel setting until
2675          * scan finish with changed = 0
2676          */
2677         if (!changed || (changed & IEEE80211_CONF_CHANGE_CHANNEL)) {
2678                 if (scan_active)
2679                         goto set_ch_out;
2680
2681                 ch = ieee80211_frequency_to_channel(conf->channel->center_freq);
2682                 ch_info = iwl_get_channel_info(priv, conf->channel->band, ch);
2683                 if (!is_channel_valid(ch_info)) {
2684                         IWL_DEBUG_MAC80211(priv, "leave - invalid channel\n");
2685                         ret = -EINVAL;
2686                         goto set_ch_out;
2687                 }
2688
2689                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC &&
2690                         !is_channel_ibss(ch_info)) {
2691                         IWL_ERR(priv, "channel %d in band %d not "
2692                                 "IBSS channel\n",
2693                                 conf->channel->hw_value, conf->channel->band);
2694                         ret = -EINVAL;
2695                         goto set_ch_out;
2696                 }
2697
2698                 spin_lock_irqsave(&priv->lock, flags);
2699
2700                 /* Configure HT40 channels */
2701                 ht_conf->is_ht = conf_is_ht(conf);
2702                 if (ht_conf->is_ht) {
2703                         if (conf_is_ht40_minus(conf)) {
2704                                 ht_conf->extension_chan_offset =
2705                                         IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2706                                 ht_conf->is_40mhz = true;
2707                         } else if (conf_is_ht40_plus(conf)) {
2708                                 ht_conf->extension_chan_offset =
2709                                         IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2710                                 ht_conf->is_40mhz = true;
2711                         } else {
2712                                 ht_conf->extension_chan_offset =
2713                                         IEEE80211_HT_PARAM_CHA_SEC_NONE;
2714                                 ht_conf->is_40mhz = false;
2715                         }
2716                 } else
2717                         ht_conf->is_40mhz = false;
2718                 /* Default to no protection. Protection mode will later be set
2719                  * from BSS config in iwl_ht_conf */
2720                 ht_conf->ht_protection = IEEE80211_HT_OP_MODE_PROTECTION_NONE;
2721
2722                 /* if we are switching from ht to 2.4 clear flags
2723                  * from any ht related info since 2.4 does not
2724                  * support ht */
2725                 if ((le16_to_cpu(priv->staging_rxon.channel) != ch))
2726                         priv->staging_rxon.flags = 0;
2727
2728                 iwl_set_rxon_channel(priv, conf->channel);
2729
2730                 iwl_set_flags_for_band(priv, conf->channel->band);
2731                 spin_unlock_irqrestore(&priv->lock, flags);
2732                 if (iwl_is_associated(priv) &&
2733                     (le16_to_cpu(priv->active_rxon.channel) != ch) &&
2734                     priv->cfg->ops->lib->set_channel_switch) {
2735                         iwl_set_rate(priv);
2736                         /*
2737                          * at this point, staging_rxon has the
2738                          * configuration for channel switch
2739                          */
2740                         ret = priv->cfg->ops->lib->set_channel_switch(priv,
2741                                 ch);
2742                         if (!ret) {
2743                                 iwl_print_rx_config_cmd(priv);
2744                                 goto out;
2745                         }
2746                         priv->switch_rxon.switch_in_progress = false;
2747                 }
2748  set_ch_out:
2749                 /* The list of supported rates and rate mask can be different
2750                  * for each band; since the band may have changed, reset
2751                  * the rate mask to what mac80211 lists */
2752                 iwl_set_rate(priv);
2753         }
2754
2755         if (changed & (IEEE80211_CONF_CHANGE_PS |
2756                         IEEE80211_CONF_CHANGE_IDLE)) {
2757                 ret = iwl_power_update_mode(priv, false);
2758                 if (ret)
2759                         IWL_DEBUG_MAC80211(priv, "Error setting sleep level\n");
2760         }
2761
2762         if (changed & IEEE80211_CONF_CHANGE_POWER) {
2763                 IWL_DEBUG_MAC80211(priv, "TX Power old=%d new=%d\n",
2764                         priv->tx_power_user_lmt, conf->power_level);
2765
2766                 iwl_set_tx_power(priv, conf->power_level, false);
2767         }
2768
2769         /* call to ensure that 4965 rx_chain is set properly in monitor mode */
2770         if (priv->cfg->ops->hcmd->set_rxon_chain)
2771                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
2772
2773         if (!iwl_is_ready(priv)) {
2774                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2775                 goto out;
2776         }
2777
2778         if (scan_active)
2779                 goto out;
2780
2781         if (memcmp(&priv->active_rxon,
2782                    &priv->staging_rxon, sizeof(priv->staging_rxon)))
2783                 iwlcore_commit_rxon(priv);
2784         else
2785                 IWL_DEBUG_INFO(priv, "Not re-sending same RXON configuration.\n");
2786
2787
2788 out:
2789         IWL_DEBUG_MAC80211(priv, "leave\n");
2790         mutex_unlock(&priv->mutex);
2791         return ret;
2792 }
2793 EXPORT_SYMBOL(iwl_mac_config);
2794
2795 int iwl_mac_get_tx_stats(struct ieee80211_hw *hw,
2796                          struct ieee80211_tx_queue_stats *stats)
2797 {
2798         struct iwl_priv *priv = hw->priv;
2799         int i, avail;
2800         struct iwl_tx_queue *txq;
2801         struct iwl_queue *q;
2802         unsigned long flags;
2803
2804         IWL_DEBUG_MAC80211(priv, "enter\n");
2805
2806         if (!iwl_is_ready_rf(priv)) {
2807                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
2808                 return -EIO;
2809         }
2810
2811         spin_lock_irqsave(&priv->lock, flags);
2812
2813         for (i = 0; i < AC_NUM; i++) {
2814                 txq = &priv->txq[i];
2815                 q = &txq->q;
2816                 avail = iwl_queue_space(q);
2817
2818                 stats[i].len = q->n_window - avail;
2819                 stats[i].limit = q->n_window - q->high_mark;
2820                 stats[i].count = q->n_window;
2821
2822         }
2823         spin_unlock_irqrestore(&priv->lock, flags);
2824
2825         IWL_DEBUG_MAC80211(priv, "leave\n");
2826
2827         return 0;
2828 }
2829 EXPORT_SYMBOL(iwl_mac_get_tx_stats);
2830
2831 void iwl_mac_reset_tsf(struct ieee80211_hw *hw)
2832 {
2833         struct iwl_priv *priv = hw->priv;
2834         unsigned long flags;
2835
2836         mutex_lock(&priv->mutex);
2837         IWL_DEBUG_MAC80211(priv, "enter\n");
2838
2839         spin_lock_irqsave(&priv->lock, flags);
2840         memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_config));
2841         spin_unlock_irqrestore(&priv->lock, flags);
2842
2843         iwl_reset_qos(priv);
2844
2845         spin_lock_irqsave(&priv->lock, flags);
2846         priv->assoc_id = 0;
2847         priv->assoc_capability = 0;
2848         priv->assoc_station_added = 0;
2849
2850         /* new association get rid of ibss beacon skb */
2851         if (priv->ibss_beacon)
2852                 dev_kfree_skb(priv->ibss_beacon);
2853
2854         priv->ibss_beacon = NULL;
2855
2856         priv->beacon_int = priv->vif->bss_conf.beacon_int;
2857         priv->timestamp = 0;
2858         if ((priv->iw_mode == NL80211_IFTYPE_STATION))
2859                 priv->beacon_int = 0;
2860
2861         spin_unlock_irqrestore(&priv->lock, flags);
2862
2863         if (!iwl_is_ready_rf(priv)) {
2864                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2865                 mutex_unlock(&priv->mutex);
2866                 return;
2867         }
2868
2869         /* we are restarting association process
2870          * clear RXON_FILTER_ASSOC_MSK bit
2871          */
2872         if (priv->iw_mode != NL80211_IFTYPE_AP) {
2873                 iwl_scan_cancel_timeout(priv, 100);
2874                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2875                 iwlcore_commit_rxon(priv);
2876         }
2877
2878         if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
2879                 IWL_DEBUG_MAC80211(priv, "leave - not in IBSS\n");
2880                 mutex_unlock(&priv->mutex);
2881                 return;
2882         }
2883
2884         iwl_set_rate(priv);
2885
2886         mutex_unlock(&priv->mutex);
2887
2888         IWL_DEBUG_MAC80211(priv, "leave\n");
2889 }
2890 EXPORT_SYMBOL(iwl_mac_reset_tsf);
2891
2892 int iwl_alloc_txq_mem(struct iwl_priv *priv)
2893 {
2894         if (!priv->txq)
2895                 priv->txq = kzalloc(
2896                         sizeof(struct iwl_tx_queue) * priv->cfg->num_of_queues,
2897                         GFP_KERNEL);
2898         if (!priv->txq) {
2899                 IWL_ERR(priv, "Not enough memory for txq \n");
2900                 return -ENOMEM;
2901         }
2902         return 0;
2903 }
2904 EXPORT_SYMBOL(iwl_alloc_txq_mem);
2905
2906 void iwl_free_txq_mem(struct iwl_priv *priv)
2907 {
2908         kfree(priv->txq);
2909         priv->txq = NULL;
2910 }
2911 EXPORT_SYMBOL(iwl_free_txq_mem);
2912
2913 int iwl_send_wimax_coex(struct iwl_priv *priv)
2914 {
2915         struct iwl_wimax_coex_cmd uninitialized_var(coex_cmd);
2916
2917         if (priv->cfg->support_wimax_coexist) {
2918                 /* UnMask wake up src at associated sleep */
2919                 coex_cmd.flags |= COEX_FLAGS_ASSOC_WA_UNMASK_MSK;
2920
2921                 /* UnMask wake up src at unassociated sleep */
2922                 coex_cmd.flags |= COEX_FLAGS_UNASSOC_WA_UNMASK_MSK;
2923                 memcpy(coex_cmd.sta_prio, cu_priorities,
2924                         sizeof(struct iwl_wimax_coex_event_entry) *
2925                          COEX_NUM_OF_EVENTS);
2926
2927                 /* enabling the coexistence feature */
2928                 coex_cmd.flags |= COEX_FLAGS_COEX_ENABLE_MSK;
2929
2930                 /* enabling the priorities tables */
2931                 coex_cmd.flags |= COEX_FLAGS_STA_TABLE_VALID_MSK;
2932         } else {
2933                 /* coexistence is disabled */
2934                 memset(&coex_cmd, 0, sizeof(coex_cmd));
2935         }
2936         return iwl_send_cmd_pdu(priv, COEX_PRIORITY_TABLE_CMD,
2937                                 sizeof(coex_cmd), &coex_cmd);
2938 }
2939 EXPORT_SYMBOL(iwl_send_wimax_coex);
2940
2941 #ifdef CONFIG_IWLWIFI_DEBUGFS
2942
2943 #define IWL_TRAFFIC_DUMP_SIZE   (IWL_TRAFFIC_ENTRY_SIZE * IWL_TRAFFIC_ENTRIES)
2944
2945 void iwl_reset_traffic_log(struct iwl_priv *priv)
2946 {
2947         priv->tx_traffic_idx = 0;
2948         priv->rx_traffic_idx = 0;
2949         if (priv->tx_traffic)
2950                 memset(priv->tx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
2951         if (priv->rx_traffic)
2952                 memset(priv->rx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
2953 }
2954
2955 int iwl_alloc_traffic_mem(struct iwl_priv *priv)
2956 {
2957         u32 traffic_size = IWL_TRAFFIC_DUMP_SIZE;
2958
2959         if (iwl_debug_level & IWL_DL_TX) {
2960                 if (!priv->tx_traffic) {
2961                         priv->tx_traffic =
2962                                 kzalloc(traffic_size, GFP_KERNEL);
2963                         if (!priv->tx_traffic)
2964                                 return -ENOMEM;
2965                 }
2966         }
2967         if (iwl_debug_level & IWL_DL_RX) {
2968                 if (!priv->rx_traffic) {
2969                         priv->rx_traffic =
2970                                 kzalloc(traffic_size, GFP_KERNEL);
2971                         if (!priv->rx_traffic)
2972                                 return -ENOMEM;
2973                 }
2974         }
2975         iwl_reset_traffic_log(priv);
2976         return 0;
2977 }
2978 EXPORT_SYMBOL(iwl_alloc_traffic_mem);
2979
2980 void iwl_free_traffic_mem(struct iwl_priv *priv)
2981 {
2982         kfree(priv->tx_traffic);
2983         priv->tx_traffic = NULL;
2984
2985         kfree(priv->rx_traffic);
2986         priv->rx_traffic = NULL;
2987 }
2988 EXPORT_SYMBOL(iwl_free_traffic_mem);
2989
2990 void iwl_dbg_log_tx_data_frame(struct iwl_priv *priv,
2991                       u16 length, struct ieee80211_hdr *header)
2992 {
2993         __le16 fc;
2994         u16 len;
2995
2996         if (likely(!(iwl_debug_level & IWL_DL_TX)))
2997                 return;
2998
2999         if (!priv->tx_traffic)
3000                 return;
3001
3002         fc = header->frame_control;
3003         if (ieee80211_is_data(fc)) {
3004                 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
3005                        ? IWL_TRAFFIC_ENTRY_SIZE : length;
3006                 memcpy((priv->tx_traffic +
3007                        (priv->tx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
3008                        header, len);
3009                 priv->tx_traffic_idx =
3010                         (priv->tx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
3011         }
3012 }
3013 EXPORT_SYMBOL(iwl_dbg_log_tx_data_frame);
3014
3015 void iwl_dbg_log_rx_data_frame(struct iwl_priv *priv,
3016                       u16 length, struct ieee80211_hdr *header)
3017 {
3018         __le16 fc;
3019         u16 len;
3020
3021         if (likely(!(iwl_debug_level & IWL_DL_RX)))
3022                 return;
3023
3024         if (!priv->rx_traffic)
3025                 return;
3026
3027         fc = header->frame_control;
3028         if (ieee80211_is_data(fc)) {
3029                 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
3030                        ? IWL_TRAFFIC_ENTRY_SIZE : length;
3031                 memcpy((priv->rx_traffic +
3032                        (priv->rx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
3033                        header, len);
3034                 priv->rx_traffic_idx =
3035                         (priv->rx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
3036         }
3037 }
3038 EXPORT_SYMBOL(iwl_dbg_log_rx_data_frame);
3039
3040 const char *get_mgmt_string(int cmd)
3041 {
3042         switch (cmd) {
3043                 IWL_CMD(MANAGEMENT_ASSOC_REQ);
3044                 IWL_CMD(MANAGEMENT_ASSOC_RESP);
3045                 IWL_CMD(MANAGEMENT_REASSOC_REQ);
3046                 IWL_CMD(MANAGEMENT_REASSOC_RESP);
3047                 IWL_CMD(MANAGEMENT_PROBE_REQ);
3048                 IWL_CMD(MANAGEMENT_PROBE_RESP);
3049                 IWL_CMD(MANAGEMENT_BEACON);
3050                 IWL_CMD(MANAGEMENT_ATIM);
3051                 IWL_CMD(MANAGEMENT_DISASSOC);
3052                 IWL_CMD(MANAGEMENT_AUTH);
3053                 IWL_CMD(MANAGEMENT_DEAUTH);
3054                 IWL_CMD(MANAGEMENT_ACTION);
3055         default:
3056                 return "UNKNOWN";
3057
3058         }
3059 }
3060
3061 const char *get_ctrl_string(int cmd)
3062 {
3063         switch (cmd) {
3064                 IWL_CMD(CONTROL_BACK_REQ);
3065                 IWL_CMD(CONTROL_BACK);
3066                 IWL_CMD(CONTROL_PSPOLL);
3067                 IWL_CMD(CONTROL_RTS);
3068                 IWL_CMD(CONTROL_CTS);
3069                 IWL_CMD(CONTROL_ACK);
3070                 IWL_CMD(CONTROL_CFEND);
3071                 IWL_CMD(CONTROL_CFENDACK);
3072         default:
3073                 return "UNKNOWN";
3074
3075         }
3076 }
3077
3078 void iwl_clear_tx_stats(struct iwl_priv *priv)
3079 {
3080         memset(&priv->tx_stats, 0, sizeof(struct traffic_stats));
3081
3082 }
3083
3084 void iwl_clear_rx_stats(struct iwl_priv *priv)
3085 {
3086         memset(&priv->rx_stats, 0, sizeof(struct traffic_stats));
3087 }
3088
3089 /*
3090  * if CONFIG_IWLWIFI_DEBUGFS defined, iwl_update_stats function will
3091  * record all the MGMT, CTRL and DATA pkt for both TX and Rx pass.
3092  * Use debugFs to display the rx/rx_statistics
3093  * if CONFIG_IWLWIFI_DEBUGFS not being defined, then no MGMT and CTRL
3094  * information will be recorded, but DATA pkt still will be recorded
3095  * for the reason of iwl_led.c need to control the led blinking based on
3096  * number of tx and rx data.
3097  *
3098  */
3099 void iwl_update_stats(struct iwl_priv *priv, bool is_tx, __le16 fc, u16 len)
3100 {
3101         struct traffic_stats    *stats;
3102
3103         if (is_tx)
3104                 stats = &priv->tx_stats;
3105         else
3106                 stats = &priv->rx_stats;
3107
3108         if (ieee80211_is_mgmt(fc)) {
3109                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
3110                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
3111                         stats->mgmt[MANAGEMENT_ASSOC_REQ]++;
3112                         break;
3113                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP):
3114                         stats->mgmt[MANAGEMENT_ASSOC_RESP]++;
3115                         break;
3116                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
3117                         stats->mgmt[MANAGEMENT_REASSOC_REQ]++;
3118                         break;
3119                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP):
3120                         stats->mgmt[MANAGEMENT_REASSOC_RESP]++;
3121                         break;
3122                 case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ):
3123                         stats->mgmt[MANAGEMENT_PROBE_REQ]++;
3124                         break;
3125                 case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP):
3126                         stats->mgmt[MANAGEMENT_PROBE_RESP]++;
3127                         break;
3128                 case cpu_to_le16(IEEE80211_STYPE_BEACON):
3129                         stats->mgmt[MANAGEMENT_BEACON]++;
3130                         break;
3131                 case cpu_to_le16(IEEE80211_STYPE_ATIM):
3132                         stats->mgmt[MANAGEMENT_ATIM]++;
3133                         break;
3134                 case cpu_to_le16(IEEE80211_STYPE_DISASSOC):
3135                         stats->mgmt[MANAGEMENT_DISASSOC]++;
3136                         break;
3137                 case cpu_to_le16(IEEE80211_STYPE_AUTH):
3138                         stats->mgmt[MANAGEMENT_AUTH]++;
3139                         break;
3140                 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
3141                         stats->mgmt[MANAGEMENT_DEAUTH]++;
3142                         break;
3143                 case cpu_to_le16(IEEE80211_STYPE_ACTION):
3144                         stats->mgmt[MANAGEMENT_ACTION]++;
3145                         break;
3146                 }
3147         } else if (ieee80211_is_ctl(fc)) {
3148                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
3149                 case cpu_to_le16(IEEE80211_STYPE_BACK_REQ):
3150                         stats->ctrl[CONTROL_BACK_REQ]++;
3151                         break;
3152                 case cpu_to_le16(IEEE80211_STYPE_BACK):
3153                         stats->ctrl[CONTROL_BACK]++;
3154                         break;
3155                 case cpu_to_le16(IEEE80211_STYPE_PSPOLL):
3156                         stats->ctrl[CONTROL_PSPOLL]++;
3157                         break;
3158                 case cpu_to_le16(IEEE80211_STYPE_RTS):
3159                         stats->ctrl[CONTROL_RTS]++;
3160                         break;
3161                 case cpu_to_le16(IEEE80211_STYPE_CTS):
3162                         stats->ctrl[CONTROL_CTS]++;
3163                         break;
3164                 case cpu_to_le16(IEEE80211_STYPE_ACK):
3165                         stats->ctrl[CONTROL_ACK]++;
3166                         break;
3167                 case cpu_to_le16(IEEE80211_STYPE_CFEND):
3168                         stats->ctrl[CONTROL_CFEND]++;
3169                         break;
3170                 case cpu_to_le16(IEEE80211_STYPE_CFENDACK):
3171                         stats->ctrl[CONTROL_CFENDACK]++;
3172                         break;
3173                 }
3174         } else {
3175                 /* data */
3176                 stats->data_cnt++;
3177                 stats->data_bytes += len;
3178         }
3179 }
3180 EXPORT_SYMBOL(iwl_update_stats);
3181 #endif
3182
3183 #ifdef CONFIG_PM
3184
3185 int iwl_pci_suspend(struct pci_dev *pdev, pm_message_t state)
3186 {
3187         struct iwl_priv *priv = pci_get_drvdata(pdev);
3188
3189         /*
3190          * This function is called when system goes into suspend state
3191          * mac80211 will call iwl_mac_stop() from the mac80211 suspend function
3192          * first but since iwl_mac_stop() has no knowledge of who the caller is,
3193          * it will not call apm_ops.stop() to stop the DMA operation.
3194          * Calling apm_ops.stop here to make sure we stop the DMA.
3195          */
3196         priv->cfg->ops->lib->apm_ops.stop(priv);
3197
3198         pci_save_state(pdev);
3199         pci_disable_device(pdev);
3200         pci_set_power_state(pdev, PCI_D3hot);
3201
3202         return 0;
3203 }
3204 EXPORT_SYMBOL(iwl_pci_suspend);
3205
3206 int iwl_pci_resume(struct pci_dev *pdev)
3207 {
3208         struct iwl_priv *priv = pci_get_drvdata(pdev);
3209         int ret;
3210
3211         pci_set_power_state(pdev, PCI_D0);
3212         ret = pci_enable_device(pdev);
3213         if (ret)
3214                 return ret;
3215         pci_restore_state(pdev);
3216         iwl_enable_interrupts(priv);
3217
3218         return 0;
3219 }
3220 EXPORT_SYMBOL(iwl_pci_resume);
3221
3222 #endif /* CONFIG_PM */