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

   1 /******************************************************************************
   2  *
   3  * GPL LICENSE SUMMARY
   4  *
   5  * Copyright(c) 2008 - 2009 Intel Corporation. All rights reserved.
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of version 2 of the GNU General Public License as
   9  * published by the Free Software Foundation.
  10  *
  11  * This program is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
  19  * USA
  20  *
  21  * The full GNU General Public License is included in this distribution
  22  * in the file called LICENSE.GPL.
  23  *
  24  * Contact Information:
  25  *  Intel Linux Wireless <ilw@linux.intel.com>
  26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27  *****************************************************************************/
  28
  29 #include <linux/kernel.h>
  30 #include <linux/module.h>
  31 #include <linux/etherdevice.h>
  32 #include <net/mac80211.h>
  33
  34 #include "iwl-eeprom.h"
  35 #include "iwl-dev.h" /* FIXME: remove */
  36 #include "iwl-debug.h"
  37 #include "iwl-core.h"
  38 #include "iwl-io.h"
  39 #include "iwl-power.h"
  40 #include "iwl-sta.h"
  41 #include "iwl-helpers.h"
  42
  43
  44 MODULE_DESCRIPTION("iwl core");
  45 MODULE_VERSION(IWLWIFI_VERSION);
  46 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
  47 MODULE_LICENSE("GPL");
  48
  49 #define IWL_DECLARE_RATE_INFO(r, s, ip, in, rp, rn, pp, np)    \
  50         [IWL_RATE_##r##M_INDEX] = { IWL_RATE_##r##M_PLCP,      \
  51                                     IWL_RATE_SISO_##s##M_PLCP, \
  52                                     IWL_RATE_MIMO2_##s##M_PLCP,\
  53                                     IWL_RATE_MIMO3_##s##M_PLCP,\
  54                                     IWL_RATE_##r##M_IEEE,      \
  55                                     IWL_RATE_##ip##M_INDEX,    \
  56                                     IWL_RATE_##in##M_INDEX,    \
  57                                     IWL_RATE_##rp##M_INDEX,    \
  58                                     IWL_RATE_##rn##M_INDEX,    \
  59                                     IWL_RATE_##pp##M_INDEX,    \
  60                                     IWL_RATE_##np##M_INDEX }
  61
  62 u32 iwl_debug_level;
  63 EXPORT_SYMBOL(iwl_debug_level);
  64
  65 static irqreturn_t iwl_isr(int irq, void *data);
  66
  67 /*
  68  * Parameter order:
  69  *   rate, ht rate, prev rate, next rate, prev tgg rate, next tgg rate
  70  *
  71  * If there isn't a valid next or previous rate then INV is used which
  72  * maps to IWL_RATE_INVALID
  73  *
  74  */
  75 const struct iwl_rate_info iwl_rates[IWL_RATE_COUNT] = {
  76         IWL_DECLARE_RATE_INFO(1, INV, INV, 2, INV, 2, INV, 2),    /*  1mbps */
  77         IWL_DECLARE_RATE_INFO(2, INV, 1, 5, 1, 5, 1, 5),          /*  2mbps */
  78         IWL_DECLARE_RATE_INFO(5, INV, 2, 6, 2, 11, 2, 11),        /*5.5mbps */
  79         IWL_DECLARE_RATE_INFO(11, INV, 9, 12, 9, 12, 5, 18),      /* 11mbps */
  80         IWL_DECLARE_RATE_INFO(6, 6, 5, 9, 5, 11, 5, 11),        /*  6mbps */
  81         IWL_DECLARE_RATE_INFO(9, 6, 6, 11, 6, 11, 5, 11),       /*  9mbps */
  82         IWL_DECLARE_RATE_INFO(12, 12, 11, 18, 11, 18, 11, 18),   /* 12mbps */
  83         IWL_DECLARE_RATE_INFO(18, 18, 12, 24, 12, 24, 11, 24),   /* 18mbps */
  84         IWL_DECLARE_RATE_INFO(24, 24, 18, 36, 18, 36, 18, 36),   /* 24mbps */
  85         IWL_DECLARE_RATE_INFO(36, 36, 24, 48, 24, 48, 24, 48),   /* 36mbps */
  86         IWL_DECLARE_RATE_INFO(48, 48, 36, 54, 36, 54, 36, 54),   /* 48mbps */
  87         IWL_DECLARE_RATE_INFO(54, 54, 48, INV, 48, INV, 48, INV),/* 54mbps */
  88         IWL_DECLARE_RATE_INFO(60, 60, 48, INV, 48, INV, 48, INV),/* 60mbps */
  89         /* FIXME:RS:          ^^    should be INV (legacy) */
  90 };
  91 EXPORT_SYMBOL(iwl_rates);
  92
  93 /**
  94  * translate ucode response to mac80211 tx status control values
  95  */
  96 void iwl_hwrate_to_tx_control(struct iwl_priv *priv, u32 rate_n_flags,
  97                                   struct ieee80211_tx_info *info)
  98 {
  99         struct ieee80211_tx_rate *r = &info->control.rates[0];
 100
 101         info->antenna_sel_tx =
 102                 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
 103         if (rate_n_flags & RATE_MCS_HT_MSK)
 104                 r->flags |= IEEE80211_TX_RC_MCS;
 105         if (rate_n_flags & RATE_MCS_GF_MSK)
 106                 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
 107         if (rate_n_flags & RATE_MCS_HT40_MSK)
 108                 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
 109         if (rate_n_flags & RATE_MCS_DUP_MSK)
 110                 r->flags |= IEEE80211_TX_RC_DUP_DATA;
 111         if (rate_n_flags & RATE_MCS_SGI_MSK)
 112                 r->flags |= IEEE80211_TX_RC_SHORT_GI;
 113         r->idx = iwl_hwrate_to_mac80211_idx(rate_n_flags, info->band);
 114 }
 115 EXPORT_SYMBOL(iwl_hwrate_to_tx_control);
 116
 117 int iwl_hwrate_to_plcp_idx(u32 rate_n_flags)
 118 {
 119         int idx = 0;
 120
 121         /* HT rate format */
 122         if (rate_n_flags & RATE_MCS_HT_MSK) {
 123                 idx = (rate_n_flags & 0xff);
 124
 125                 if (idx >= IWL_RATE_MIMO3_6M_PLCP)
 126                         idx = idx - IWL_RATE_MIMO3_6M_PLCP;
 127                 else if (idx >= IWL_RATE_MIMO2_6M_PLCP)
 128                         idx = idx - IWL_RATE_MIMO2_6M_PLCP;
 129
 130                 idx += IWL_FIRST_OFDM_RATE;
 131                 /* skip 9M not supported in ht*/
 132                 if (idx >= IWL_RATE_9M_INDEX)
 133                         idx += 1;
 134                 if ((idx >= IWL_FIRST_OFDM_RATE) && (idx <= IWL_LAST_OFDM_RATE))
 135                         return idx;
 136
 137         /* legacy rate format, search for match in table */
 138         } else {
 139                 for (idx = 0; idx < ARRAY_SIZE(iwl_rates); idx++)
 140                         if (iwl_rates[idx].plcp == (rate_n_flags & 0xFF))
 141                                 return idx;
 142         }
 143
 144         return -1;
 145 }
 146 EXPORT_SYMBOL(iwl_hwrate_to_plcp_idx);
 147
 148 int iwl_hwrate_to_mac80211_idx(u32 rate_n_flags, enum ieee80211_band band)
 149 {
 150         int idx = 0;
 151         int band_offset = 0;
 152
 153         /* HT rate format: mac80211 wants an MCS number, which is just LSB */
 154         if (rate_n_flags & RATE_MCS_HT_MSK) {
 155                 idx = (rate_n_flags & 0xff);
 156                 return idx;
 157         /* Legacy rate format, search for match in table */
 158         } else {
 159                 if (band == IEEE80211_BAND_5GHZ)
 160                         band_offset = IWL_FIRST_OFDM_RATE;
 161                 for (idx = band_offset; idx < IWL_RATE_COUNT_LEGACY; idx++)
 162                         if (iwl_rates[idx].plcp == (rate_n_flags & 0xFF))
 163                                 return idx - band_offset;
 164         }
 165
 166         return -1;
 167 }
 168
 169 u8 iwl_toggle_tx_ant(struct iwl_priv *priv, u8 ant)
 170 {
 171         int i;
 172         u8 ind = ant;
 173         for (i = 0; i < RATE_ANT_NUM - 1; i++) {
 174                 ind = (ind + 1) < RATE_ANT_NUM ?  ind + 1 : 0;
 175                 if (priv->hw_params.valid_tx_ant & BIT(ind))
 176                         return ind;
 177         }
 178         return ant;
 179 }
 180
 181 const u8 iwl_bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
 182 EXPORT_SYMBOL(iwl_bcast_addr);
 183
 184
 185 /* This function both allocates and initializes hw and priv. */
 186 struct ieee80211_hw *iwl_alloc_all(struct iwl_cfg *cfg,
 187                 struct ieee80211_ops *hw_ops)
 188 {
 189         struct iwl_priv *priv;
 190
 191         /* mac80211 allocates memory for this device instance, including
 192          *   space for this driver's private structure */
 193         struct ieee80211_hw *hw =
 194                 ieee80211_alloc_hw(sizeof(struct iwl_priv), hw_ops);
 195         if (hw == NULL) {
 196                 printk(KERN_ERR "%s: Can not allocate network device\n",
 197                        cfg->name);
 198                 goto out;
 199         }
 200
 201         priv = hw->priv;
 202         priv->hw = hw;
 203
 204 out:
 205         return hw;
 206 }
 207 EXPORT_SYMBOL(iwl_alloc_all);
 208
 209 void iwl_hw_detect(struct iwl_priv *priv)
 210 {
 211         priv->hw_rev = _iwl_read32(priv, CSR_HW_REV);
 212         priv->hw_wa_rev = _iwl_read32(priv, CSR_HW_REV_WA_REG);
 213         pci_read_config_byte(priv->pci_dev, PCI_REVISION_ID, &priv->rev_id);
 214 }
 215 EXPORT_SYMBOL(iwl_hw_detect);
 216
 217 int iwl_hw_nic_init(struct iwl_priv *priv)
 218 {
 219         unsigned long flags;
 220         struct iwl_rx_queue *rxq = &priv->rxq;
 221         int ret;
 222
 223         /* nic_init */
 224         spin_lock_irqsave(&priv->lock, flags);
 225         priv->cfg->ops->lib->apm_ops.init(priv);
 226         iwl_write32(priv, CSR_INT_COALESCING, 512 / 32);
 227         spin_unlock_irqrestore(&priv->lock, flags);
 228
 229         ret = priv->cfg->ops->lib->apm_ops.set_pwr_src(priv, IWL_PWR_SRC_VMAIN);
 230
 231         priv->cfg->ops->lib->apm_ops.config(priv);
 232
 233         /* Allocate the RX queue, or reset if it is already allocated */
 234         if (!rxq->bd) {
 235                 ret = iwl_rx_queue_alloc(priv);
 236                 if (ret) {
 237                         IWL_ERR(priv, "Unable to initialize Rx queue\n");
 238                         return -ENOMEM;
 239                 }
 240         } else
 241                 iwl_rx_queue_reset(priv, rxq);
 242
 243         iwl_rx_replenish(priv);
 244
 245         iwl_rx_init(priv, rxq);
 246
 247         spin_lock_irqsave(&priv->lock, flags);
 248
 249         rxq->need_update = 1;
 250         iwl_rx_queue_update_write_ptr(priv, rxq);
 251
 252         spin_unlock_irqrestore(&priv->lock, flags);
 253
 254         /* Allocate and init all Tx and Command queues */
 255         ret = iwl_txq_ctx_reset(priv);
 256         if (ret)
 257                 return ret;
 258
 259         set_bit(STATUS_INIT, &priv->status);
 260
 261         return 0;
 262 }
 263 EXPORT_SYMBOL(iwl_hw_nic_init);
 264
 265 /*
 266  * QoS  support
 267 */
 268 void iwl_activate_qos(struct iwl_priv *priv, u8 force)
 269 {
 270         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
 271                 return;
 272
 273         priv->qos_data.def_qos_parm.qos_flags = 0;
 274
 275         if (priv->qos_data.qos_cap.q_AP.queue_request &&
 276             !priv->qos_data.qos_cap.q_AP.txop_request)
 277                 priv->qos_data.def_qos_parm.qos_flags |=
 278                         QOS_PARAM_FLG_TXOP_TYPE_MSK;
 279         if (priv->qos_data.qos_active)
 280                 priv->qos_data.def_qos_parm.qos_flags |=
 281                         QOS_PARAM_FLG_UPDATE_EDCA_MSK;
 282
 283         if (priv->current_ht_config.is_ht)
 284                 priv->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
 285
 286         if (force || iwl_is_associated(priv)) {
 287                 IWL_DEBUG_QOS(priv, "send QoS cmd with Qos active=%d FLAGS=0x%X\n",
 288                                 priv->qos_data.qos_active,
 289                                 priv->qos_data.def_qos_parm.qos_flags);
 290
 291                 iwl_send_cmd_pdu_async(priv, REPLY_QOS_PARAM,
 292                                        sizeof(struct iwl_qosparam_cmd),
 293                                        &priv->qos_data.def_qos_parm, NULL);
 294         }
 295 }
 296 EXPORT_SYMBOL(iwl_activate_qos);
 297
 298 /*
 299  * AC        CWmin         CW max      AIFSN      TXOP Limit    TXOP Limit
 300  *                                              (802.11b)      (802.11a/g)
 301  * AC_BK      15            1023        7           0               0
 302  * AC_BE      15            1023        3           0               0
 303  * AC_VI       7              15        2          6.016ms       3.008ms
 304  * AC_VO       3               7        2          3.264ms       1.504ms
 305  */
 306 void iwl_reset_qos(struct iwl_priv *priv)
 307 {
 308         u16 cw_min = 15;
 309         u16 cw_max = 1023;
 310         u8 aifs = 2;
 311         bool is_legacy = false;
 312         unsigned long flags;
 313         int i;
 314
 315         spin_lock_irqsave(&priv->lock, flags);
 316         /* QoS always active in AP and ADHOC mode
 317          * In STA mode wait for association
 318          */
 319         if (priv->iw_mode == NL80211_IFTYPE_ADHOC ||
 320             priv->iw_mode == NL80211_IFTYPE_AP)
 321                 priv->qos_data.qos_active = 1;
 322         else
 323                 priv->qos_data.qos_active = 0;
 324
 325         /* check for legacy mode */
 326         if ((priv->iw_mode == NL80211_IFTYPE_ADHOC &&
 327             (priv->active_rate & IWL_OFDM_RATES_MASK) == 0) ||
 328             (priv->iw_mode == NL80211_IFTYPE_STATION &&
 329             (priv->staging_rxon.flags & RXON_FLG_SHORT_SLOT_MSK) == 0)) {
 330                 cw_min = 31;
 331                 is_legacy = 1;
 332         }
 333
 334         if (priv->qos_data.qos_active)
 335                 aifs = 3;
 336
 337         /* AC_BE */
 338         priv->qos_data.def_qos_parm.ac[0].cw_min = cpu_to_le16(cw_min);
 339         priv->qos_data.def_qos_parm.ac[0].cw_max = cpu_to_le16(cw_max);
 340         priv->qos_data.def_qos_parm.ac[0].aifsn = aifs;
 341         priv->qos_data.def_qos_parm.ac[0].edca_txop = 0;
 342         priv->qos_data.def_qos_parm.ac[0].reserved1 = 0;
 343
 344         if (priv->qos_data.qos_active) {
 345                 /* AC_BK */
 346                 i = 1;
 347                 priv->qos_data.def_qos_parm.ac[i].cw_min = cpu_to_le16(cw_min);
 348                 priv->qos_data.def_qos_parm.ac[i].cw_max = cpu_to_le16(cw_max);
 349                 priv->qos_data.def_qos_parm.ac[i].aifsn = 7;
 350                 priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
 351                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
 352
 353                 /* AC_VI */
 354                 i = 2;
 355                 priv->qos_data.def_qos_parm.ac[i].cw_min =
 356                         cpu_to_le16((cw_min + 1) / 2 - 1);
 357                 priv->qos_data.def_qos_parm.ac[i].cw_max =
 358                         cpu_to_le16(cw_min);
 359                 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
 360                 if (is_legacy)
 361                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
 362                                 cpu_to_le16(6016);
 363                 else
 364                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
 365                                 cpu_to_le16(3008);
 366                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
 367
 368                 /* AC_VO */
 369                 i = 3;
 370                 priv->qos_data.def_qos_parm.ac[i].cw_min =
 371                         cpu_to_le16((cw_min + 1) / 4 - 1);
 372                 priv->qos_data.def_qos_parm.ac[i].cw_max =
 373                         cpu_to_le16((cw_min + 1) / 2 - 1);
 374                 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
 375                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
 376                 if (is_legacy)
 377                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
 378                                 cpu_to_le16(3264);
 379                 else
 380                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
 381                                 cpu_to_le16(1504);
 382         } else {
 383                 for (i = 1; i < 4; i++) {
 384                         priv->qos_data.def_qos_parm.ac[i].cw_min =
 385                                 cpu_to_le16(cw_min);
 386                         priv->qos_data.def_qos_parm.ac[i].cw_max =
 387                                 cpu_to_le16(cw_max);
 388                         priv->qos_data.def_qos_parm.ac[i].aifsn = aifs;
 389                         priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
 390                         priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
 391                 }
 392         }
 393         IWL_DEBUG_QOS(priv, "set QoS to default \n");
 394
 395         spin_unlock_irqrestore(&priv->lock, flags);
 396 }
 397 EXPORT_SYMBOL(iwl_reset_qos);
 398
 399 #define MAX_BIT_RATE_40_MHZ 150 /* Mbps */
 400 #define MAX_BIT_RATE_20_MHZ 72 /* Mbps */
 401 static void iwlcore_init_ht_hw_capab(const struct iwl_priv *priv,
 402                               struct ieee80211_sta_ht_cap *ht_info,
 403                               enum ieee80211_band band)
 404 {
 405         u16 max_bit_rate = 0;
 406         u8 rx_chains_num = priv->hw_params.rx_chains_num;
 407         u8 tx_chains_num = priv->hw_params.tx_chains_num;
 408
 409         ht_info->cap = 0;
 410         memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));
 411
 412         ht_info->ht_supported = true;
 413
 414         if (priv->cfg->ht_greenfield_support)
 415                 ht_info->cap |= IEEE80211_HT_CAP_GRN_FLD;
 416         ht_info->cap |= IEEE80211_HT_CAP_SGI_20;
 417         ht_info->cap |= (IEEE80211_HT_CAP_SM_PS &
 418                              (WLAN_HT_CAP_SM_PS_DISABLED << 2));
 419
 420         max_bit_rate = MAX_BIT_RATE_20_MHZ;
 421         if (priv->hw_params.ht40_channel & BIT(band)) {
 422                 ht_info->cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 423                 ht_info->cap |= IEEE80211_HT_CAP_SGI_40;
 424                 ht_info->mcs.rx_mask[4] = 0x01;
 425                 max_bit_rate = MAX_BIT_RATE_40_MHZ;
 426         }
 427
 428         if (priv->cfg->mod_params->amsdu_size_8K)
 429                 ht_info->cap |= IEEE80211_HT_CAP_MAX_AMSDU;
 430
 431         ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
 432         ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;
 433
 434         ht_info->mcs.rx_mask[0] = 0xFF;
 435         if (rx_chains_num >= 2)
 436                 ht_info->mcs.rx_mask[1] = 0xFF;
 437         if (rx_chains_num >= 3)
 438                 ht_info->mcs.rx_mask[2] = 0xFF;
 439
 440         /* Highest supported Rx data rate */
 441         max_bit_rate *= rx_chains_num;
 442         WARN_ON(max_bit_rate & ~IEEE80211_HT_MCS_RX_HIGHEST_MASK);
 443         ht_info->mcs.rx_highest = cpu_to_le16(max_bit_rate);
 444
 445         /* Tx MCS capabilities */
 446         ht_info->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
 447         if (tx_chains_num != rx_chains_num) {
 448                 ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
 449                 ht_info->mcs.tx_params |= ((tx_chains_num - 1) <<
 450                                 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT);
 451         }
 452 }
 453
 454 static void iwlcore_init_hw_rates(struct iwl_priv *priv,
 455                               struct ieee80211_rate *rates)
 456 {
 457         int i;
 458
 459         for (i = 0; i < IWL_RATE_COUNT_LEGACY; i++) {
 460                 rates[i].bitrate = iwl_rates[i].ieee * 5;
 461                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
 462                 rates[i].hw_value_short = i;
 463                 rates[i].flags = 0;
 464                 if ((i >= IWL_FIRST_CCK_RATE) && (i <= IWL_LAST_CCK_RATE)) {
 465                         /*
 466                          * If CCK != 1M then set short preamble rate flag.
 467                          */
 468                         rates[i].flags |=
 469                                 (iwl_rates[i].plcp == IWL_RATE_1M_PLCP) ?
 470                                         0 : IEEE80211_RATE_SHORT_PREAMBLE;
 471                 }
 472         }
 473 }
 474
 475
 476 /**
 477  * iwlcore_init_geos - Initialize mac80211's geo/channel info based from eeprom
 478  */
 479 int iwlcore_init_geos(struct iwl_priv *priv)
 480 {
 481         struct iwl_channel_info *ch;
 482         struct ieee80211_supported_band *sband;
 483         struct ieee80211_channel *channels;
 484         struct ieee80211_channel *geo_ch;
 485         struct ieee80211_rate *rates;
 486         int i = 0;
 487
 488         if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
 489             priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
 490                 IWL_DEBUG_INFO(priv, "Geography modes already initialized.\n");
 491                 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
 492                 return 0;
 493         }
 494
 495         channels = kzalloc(sizeof(struct ieee80211_channel) *
 496                            priv->channel_count, GFP_KERNEL);
 497         if (!channels)
 498                 return -ENOMEM;
 499
 500         rates = kzalloc((sizeof(struct ieee80211_rate) * IWL_RATE_COUNT_LEGACY),
 501                         GFP_KERNEL);
 502         if (!rates) {
 503                 kfree(channels);
 504                 return -ENOMEM;
 505         }
 506
 507         /* 5.2GHz channels start after the 2.4GHz channels */
 508         sband = &priv->bands[IEEE80211_BAND_5GHZ];
 509         sband->channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)];
 510         /* just OFDM */
 511         sband->bitrates = &rates[IWL_FIRST_OFDM_RATE];
 512         sband->n_bitrates = IWL_RATE_COUNT_LEGACY - IWL_FIRST_OFDM_RATE;
 513
 514         if (priv->cfg->sku & IWL_SKU_N)
 515                 iwlcore_init_ht_hw_capab(priv, &sband->ht_cap,
 516                                          IEEE80211_BAND_5GHZ);
 517
 518         sband = &priv->bands[IEEE80211_BAND_2GHZ];
 519         sband->channels = channels;
 520         /* OFDM & CCK */
 521         sband->bitrates = rates;
 522         sband->n_bitrates = IWL_RATE_COUNT_LEGACY;
 523
 524         if (priv->cfg->sku & IWL_SKU_N)
 525                 iwlcore_init_ht_hw_capab(priv, &sband->ht_cap,
 526                                          IEEE80211_BAND_2GHZ);
 527
 528         priv->ieee_channels = channels;
 529         priv->ieee_rates = rates;
 530
 531         for (i = 0;  i < priv->channel_count; i++) {
 532                 ch = &priv->channel_info[i];
 533
 534                 /* FIXME: might be removed if scan is OK */
 535                 if (!is_channel_valid(ch))
 536                         continue;
 537
 538                 if (is_channel_a_band(ch))
 539                         sband =  &priv->bands[IEEE80211_BAND_5GHZ];
 540                 else
 541                         sband =  &priv->bands[IEEE80211_BAND_2GHZ];
 542
 543                 geo_ch = &sband->channels[sband->n_channels++];
 544
 545                 geo_ch->center_freq =
 546                                 ieee80211_channel_to_frequency(ch->channel);
 547                 geo_ch->max_power = ch->max_power_avg;
 548                 geo_ch->max_antenna_gain = 0xff;
 549                 geo_ch->hw_value = ch->channel;
 550
 551                 if (is_channel_valid(ch)) {
 552                         if (!(ch->flags & EEPROM_CHANNEL_IBSS))
 553                                 geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
 554
 555                         if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
 556                                 geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
 557
 558                         if (ch->flags & EEPROM_CHANNEL_RADAR)
 559                                 geo_ch->flags |= IEEE80211_CHAN_RADAR;
 560
 561                         geo_ch->flags |= ch->ht40_extension_channel;
 562
 563                         if (ch->max_power_avg > priv->tx_power_device_lmt)
 564                                 priv->tx_power_device_lmt = ch->max_power_avg;
 565                 } else {
 566                         geo_ch->flags |= IEEE80211_CHAN_DISABLED;
 567                 }
 568
 569                 IWL_DEBUG_INFO(priv, "Channel %d Freq=%d[%sGHz] %s flag=0x%X\n",
 570                                 ch->channel, geo_ch->center_freq,
 571                                 is_channel_a_band(ch) ?  "5.2" : "2.4",
 572                                 geo_ch->flags & IEEE80211_CHAN_DISABLED ?
 573                                 "restricted" : "valid",
 574                                  geo_ch->flags);
 575         }
 576
 577         if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) &&
 578              priv->cfg->sku & IWL_SKU_A) {
 579                 IWL_INFO(priv, "Incorrectly detected BG card as ABG. "
 580                         "Please send your PCI ID 0x%04X:0x%04X to maintainer.\n",
 581                            priv->pci_dev->device,
 582                            priv->pci_dev->subsystem_device);
 583                 priv->cfg->sku &= ~IWL_SKU_A;
 584         }
 585
 586         IWL_INFO(priv, "Tunable channels: %d 802.11bg, %d 802.11a channels\n",
 587                    priv->bands[IEEE80211_BAND_2GHZ].n_channels,
 588                    priv->bands[IEEE80211_BAND_5GHZ].n_channels);
 589
 590         set_bit(STATUS_GEO_CONFIGURED, &priv->status);
 591
 592         return 0;
 593 }
 594 EXPORT_SYMBOL(iwlcore_init_geos);
 595
 596 /*
 597  * iwlcore_free_geos - undo allocations in iwlcore_init_geos
 598  */
 599 void iwlcore_free_geos(struct iwl_priv *priv)
 600 {
 601         kfree(priv->ieee_channels);
 602         kfree(priv->ieee_rates);
 603         clear_bit(STATUS_GEO_CONFIGURED, &priv->status);
 604 }
 605 EXPORT_SYMBOL(iwlcore_free_geos);
 606
 607 /*
 608  *  iwlcore_rts_tx_cmd_flag: Set rts/cts. 3945 and 4965 only share this
 609  *  function.
 610  */
 611 void iwlcore_rts_tx_cmd_flag(struct ieee80211_tx_info *info,
 612                                 __le32 *tx_flags)
 613 {
 614         if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) {
 615                 *tx_flags |= TX_CMD_FLG_RTS_MSK;
 616                 *tx_flags &= ~TX_CMD_FLG_CTS_MSK;
 617         } else if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
 618                 *tx_flags &= ~TX_CMD_FLG_RTS_MSK;
 619                 *tx_flags |= TX_CMD_FLG_CTS_MSK;
 620         }
 621 }
 622 EXPORT_SYMBOL(iwlcore_rts_tx_cmd_flag);
 623
 624 static bool is_single_rx_stream(struct iwl_priv *priv)
 625 {
 626         return !priv->current_ht_config.is_ht ||
 627                priv->current_ht_config.single_chain_sufficient;
 628 }
 629
 630 static u8 iwl_is_channel_extension(struct iwl_priv *priv,
 631                                    enum ieee80211_band band,
 632                                    u16 channel, u8 extension_chan_offset)
 633 {
 634         const struct iwl_channel_info *ch_info;
 635
 636         ch_info = iwl_get_channel_info(priv, band, channel);
 637         if (!is_channel_valid(ch_info))
 638                 return 0;
 639
 640         if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE)
 641                 return !(ch_info->ht40_extension_channel &
 642                                         IEEE80211_CHAN_NO_HT40PLUS);
 643         else if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW)
 644                 return !(ch_info->ht40_extension_channel &
 645                                         IEEE80211_CHAN_NO_HT40MINUS);
 646
 647         return 0;
 648 }
 649
 650 u8 iwl_is_ht40_tx_allowed(struct iwl_priv *priv,
 651                          struct ieee80211_sta_ht_cap *sta_ht_inf)
 652 {
 653         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
 654
 655         if (!ht_conf->is_ht || !ht_conf->is_40mhz)
 656                 return 0;
 657
 658         /* We do not check for IEEE80211_HT_CAP_SUP_WIDTH_20_40
 659          * the bit will not set if it is pure 40MHz case
 660          */
 661         if (sta_ht_inf) {
 662                 if (!sta_ht_inf->ht_supported)
 663                         return 0;
 664         }
 665 #ifdef CONFIG_IWLWIFI_DEBUG
 666         if (priv->disable_ht40)
 667                 return 0;
 668 #endif
 669         return iwl_is_channel_extension(priv, priv->band,
 670                         le16_to_cpu(priv->staging_rxon.channel),
 671                         ht_conf->extension_chan_offset);
 672 }
 673 EXPORT_SYMBOL(iwl_is_ht40_tx_allowed);
 674
 675 static u16 iwl_adjust_beacon_interval(u16 beacon_val, u16 max_beacon_val)
 676 {
 677         u16 new_val = 0;
 678         u16 beacon_factor = 0;
 679
 680         beacon_factor = (beacon_val + max_beacon_val) / max_beacon_val;
 681         new_val = beacon_val / beacon_factor;
 682
 683         if (!new_val)
 684                 new_val = max_beacon_val;
 685
 686         return new_val;
 687 }
 688
 689 void iwl_setup_rxon_timing(struct iwl_priv *priv)
 690 {
 691         u64 tsf;
 692         s32 interval_tm, rem;
 693         unsigned long flags;
 694         struct ieee80211_conf *conf = NULL;
 695         u16 beacon_int;
 696
 697         conf = ieee80211_get_hw_conf(priv->hw);
 698
 699         spin_lock_irqsave(&priv->lock, flags);
 700         priv->rxon_timing.timestamp = cpu_to_le64(priv->timestamp);
 701         priv->rxon_timing.listen_interval = cpu_to_le16(conf->listen_interval);
 702
 703         if (priv->iw_mode == NL80211_IFTYPE_STATION) {
 704                 beacon_int = priv->beacon_int;
 705                 priv->rxon_timing.atim_window = 0;
 706         } else {
 707                 beacon_int = priv->vif->bss_conf.beacon_int;
 708
 709                 /* TODO: we need to get atim_window from upper stack
 710                  * for now we set to 0 */
 711                 priv->rxon_timing.atim_window = 0;
 712         }
 713
 714         beacon_int = iwl_adjust_beacon_interval(beacon_int,
 715                                 priv->hw_params.max_beacon_itrvl * 1024);
 716         priv->rxon_timing.beacon_interval = cpu_to_le16(beacon_int);
 717
 718         tsf = priv->timestamp; /* tsf is modifed by do_div: copy it */
 719         interval_tm = beacon_int * 1024;
 720         rem = do_div(tsf, interval_tm);
 721         priv->rxon_timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
 722
 723         spin_unlock_irqrestore(&priv->lock, flags);
 724         IWL_DEBUG_ASSOC(priv,
 725                         "beacon interval %d beacon timer %d beacon tim %d\n",
 726                         le16_to_cpu(priv->rxon_timing.beacon_interval),
 727                         le32_to_cpu(priv->rxon_timing.beacon_init_val),
 728                         le16_to_cpu(priv->rxon_timing.atim_window));
 729 }
 730 EXPORT_SYMBOL(iwl_setup_rxon_timing);
 731
 732 void iwl_set_rxon_hwcrypto(struct iwl_priv *priv, int hw_decrypt)
 733 {
 734         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
 735
 736         if (hw_decrypt)
 737                 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
 738         else
 739                 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
 740
 741 }
 742 EXPORT_SYMBOL(iwl_set_rxon_hwcrypto);
 743
 744 /**
 745  * iwl_check_rxon_cmd - validate RXON structure is valid
 746  *
 747  * NOTE:  This is really only useful during development and can eventually
 748  * be #ifdef'd out once the driver is stable and folks aren't actively
 749  * making changes
 750  */
 751 int iwl_check_rxon_cmd(struct iwl_priv *priv)
 752 {
 753         int error = 0;
 754         int counter = 1;
 755         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
 756
 757         if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
 758                 error |= le32_to_cpu(rxon->flags &
 759                                 (RXON_FLG_TGJ_NARROW_BAND_MSK |
 760                                  RXON_FLG_RADAR_DETECT_MSK));
 761                 if (error)
 762                         IWL_WARN(priv, "check 24G fields %d | %d\n",
 763                                     counter++, error);
 764         } else {
 765                 error |= (rxon->flags & RXON_FLG_SHORT_SLOT_MSK) ?
 766                                 0 : le32_to_cpu(RXON_FLG_SHORT_SLOT_MSK);
 767                 if (error)
 768                         IWL_WARN(priv, "check 52 fields %d | %d\n",
 769                                     counter++, error);
 770                 error |= le32_to_cpu(rxon->flags & RXON_FLG_CCK_MSK);
 771                 if (error)
 772                         IWL_WARN(priv, "check 52 CCK %d | %d\n",
 773                                     counter++, error);
 774         }
 775         error |= (rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1;
 776         if (error)
 777                 IWL_WARN(priv, "check mac addr %d | %d\n", counter++, error);
 778
 779         /* make sure basic rates 6Mbps and 1Mbps are supported */
 780         error |= (((rxon->ofdm_basic_rates & IWL_RATE_6M_MASK) == 0) &&
 781                   ((rxon->cck_basic_rates & IWL_RATE_1M_MASK) == 0));
 782         if (error)
 783                 IWL_WARN(priv, "check basic rate %d | %d\n", counter++, error);
 784
 785         error |= (le16_to_cpu(rxon->assoc_id) > 2007);
 786         if (error)
 787                 IWL_WARN(priv, "check assoc id %d | %d\n", counter++, error);
 788
 789         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK))
 790                         == (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK));
 791         if (error)
 792                 IWL_WARN(priv, "check CCK and short slot %d | %d\n",
 793                             counter++, error);
 794
 795         error |= ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK))
 796                         == (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK));
 797         if (error)
 798                 IWL_WARN(priv, "check CCK & auto detect %d | %d\n",
 799                             counter++, error);
 800
 801         error |= ((rxon->flags & (RXON_FLG_AUTO_DETECT_MSK |
 802                         RXON_FLG_TGG_PROTECT_MSK)) == RXON_FLG_TGG_PROTECT_MSK);
 803         if (error)
 804                 IWL_WARN(priv, "check TGG and auto detect %d | %d\n",
 805                             counter++, error);
 806
 807         if (error)
 808                 IWL_WARN(priv, "Tuning to channel %d\n",
 809                             le16_to_cpu(rxon->channel));
 810
 811         if (error) {
 812                 IWL_ERR(priv, "Not a valid iwl_rxon_assoc_cmd field values\n");
 813                 return -1;
 814         }
 815         return 0;
 816 }
 817 EXPORT_SYMBOL(iwl_check_rxon_cmd);
 818
 819 /**
 820  * iwl_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
 821  * @priv: staging_rxon is compared to active_rxon
 822  *
 823  * If the RXON structure is changing enough to require a new tune,
 824  * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
 825  * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
 826  */
 827 int iwl_full_rxon_required(struct iwl_priv *priv)
 828 {
 829
 830         /* These items are only settable from the full RXON command */
 831         if (!(iwl_is_associated(priv)) ||
 832             compare_ether_addr(priv->staging_rxon.bssid_addr,
 833                                priv->active_rxon.bssid_addr) ||
 834             compare_ether_addr(priv->staging_rxon.node_addr,
 835                                priv->active_rxon.node_addr) ||
 836             compare_ether_addr(priv->staging_rxon.wlap_bssid_addr,
 837                                priv->active_rxon.wlap_bssid_addr) ||
 838             (priv->staging_rxon.dev_type != priv->active_rxon.dev_type) ||
 839             (priv->staging_rxon.channel != priv->active_rxon.channel) ||
 840             (priv->staging_rxon.air_propagation !=
 841              priv->active_rxon.air_propagation) ||
 842             (priv->staging_rxon.ofdm_ht_single_stream_basic_rates !=
 843              priv->active_rxon.ofdm_ht_single_stream_basic_rates) ||
 844             (priv->staging_rxon.ofdm_ht_dual_stream_basic_rates !=
 845              priv->active_rxon.ofdm_ht_dual_stream_basic_rates) ||
 846             (priv->staging_rxon.ofdm_ht_triple_stream_basic_rates !=
 847              priv->active_rxon.ofdm_ht_triple_stream_basic_rates) ||
 848             (priv->staging_rxon.assoc_id != priv->active_rxon.assoc_id))
 849                 return 1;
 850
 851         /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
 852          * be updated with the RXON_ASSOC command -- however only some
 853          * flag transitions are allowed using RXON_ASSOC */
 854
 855         /* Check if we are not switching bands */
 856         if ((priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) !=
 857             (priv->active_rxon.flags & RXON_FLG_BAND_24G_MSK))
 858                 return 1;
 859
 860         /* Check if we are switching association toggle */
 861         if ((priv->staging_rxon.filter_flags & RXON_FILTER_ASSOC_MSK) !=
 862                 (priv->active_rxon.filter_flags & RXON_FILTER_ASSOC_MSK))
 863                 return 1;
 864
 865         return 0;
 866 }
 867 EXPORT_SYMBOL(iwl_full_rxon_required);
 868
 869 u8 iwl_rate_get_lowest_plcp(struct iwl_priv *priv)
 870 {
 871         int i;
 872         int rate_mask;
 873
 874         /* Set rate mask*/
 875         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)
 876                 rate_mask = priv->active_rate_basic & IWL_CCK_RATES_MASK;
 877         else
 878                 rate_mask = priv->active_rate_basic & IWL_OFDM_RATES_MASK;
 879
 880         /* Find lowest valid rate */
 881         for (i = IWL_RATE_1M_INDEX; i != IWL_RATE_INVALID;
 882                                         i = iwl_rates[i].next_ieee) {
 883                 if (rate_mask & (1 << i))
 884                         return iwl_rates[i].plcp;
 885         }
 886
 887         /* No valid rate was found. Assign the lowest one */
 888         if (priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK)
 889                 return IWL_RATE_1M_PLCP;
 890         else
 891                 return IWL_RATE_6M_PLCP;
 892 }
 893 EXPORT_SYMBOL(iwl_rate_get_lowest_plcp);
 894
 895 void iwl_set_rxon_ht(struct iwl_priv *priv, struct iwl_ht_config *ht_conf)
 896 {
 897         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
 898
 899         if (!ht_conf->is_ht) {
 900                 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
 901                         RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK |
 902                         RXON_FLG_HT40_PROT_MSK |
 903                         RXON_FLG_HT_PROT_MSK);
 904                 return;
 905         }
 906
 907         /* FIXME: if the definition of ht_protection changed, the "translation"
 908          * will be needed for rxon->flags
 909          */
 910         rxon->flags |= cpu_to_le32(ht_conf->ht_protection << RXON_FLG_HT_OPERATING_MODE_POS);
 911
 912         /* Set up channel bandwidth:
 913          * 20 MHz only, 20/40 mixed or pure 40 if ht40 ok */
 914         /* clear the HT channel mode before set the mode */
 915         rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MSK |
 916                          RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
 917         if (iwl_is_ht40_tx_allowed(priv, NULL)) {
 918                 /* pure ht40 */
 919                 if (ht_conf->ht_protection == IEEE80211_HT_OP_MODE_PROTECTION_20MHZ) {
 920                         rxon->flags |= RXON_FLG_CHANNEL_MODE_PURE_40;
 921                         /* Note: control channel is opposite of extension channel */
 922                         switch (ht_conf->extension_chan_offset) {
 923                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 924                                 rxon->flags &= ~RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
 925                                 break;
 926                         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 927                                 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
 928                                 break;
 929                         }
 930                 } else {
 931                         /* Note: control channel is opposite of extension channel */
 932                         switch (ht_conf->extension_chan_offset) {
 933                         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 934                                 rxon->flags &= ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
 935                                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
 936                                 break;
 937                         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 938                                 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
 939                                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
 940                                 break;
 941                         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
 942                         default:
 943                                 /* channel location only valid if in Mixed mode */
 944                                 IWL_ERR(priv, "invalid extension channel offset\n");
 945                                 break;
 946                         }
 947                 }
 948         } else {
 949                 rxon->flags |= RXON_FLG_CHANNEL_MODE_LEGACY;
 950         }
 951
 952         if (priv->cfg->ops->hcmd->set_rxon_chain)
 953                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
 954
 955         IWL_DEBUG_ASSOC(priv, "rxon flags 0x%X operation mode :0x%X "
 956                         "extension channel offset 0x%x\n",
 957                         le32_to_cpu(rxon->flags), ht_conf->ht_protection,
 958                         ht_conf->extension_chan_offset);
 959         return;
 960 }
 961 EXPORT_SYMBOL(iwl_set_rxon_ht);
 962
 963 #define IWL_NUM_RX_CHAINS_MULTIPLE      3
 964 #define IWL_NUM_RX_CHAINS_SINGLE        2
 965 #define IWL_NUM_IDLE_CHAINS_DUAL        2
 966 #define IWL_NUM_IDLE_CHAINS_SINGLE      1
 967
 968 /*
 969  * Determine how many receiver/antenna chains to use.
 970  *
 971  * More provides better reception via diversity.  Fewer saves power
 972  * at the expense of throughput, but only when not in powersave to
 973  * start with.
 974  *
 975  * MIMO (dual stream) requires at least 2, but works better with 3.
 976  * This does not determine *which* chains to use, just how many.
 977  */
 978 static int iwl_get_active_rx_chain_count(struct iwl_priv *priv)
 979 {
 980         /* # of Rx chains to use when expecting MIMO. */
 981         if (is_single_rx_stream(priv))
 982                 return IWL_NUM_RX_CHAINS_SINGLE;
 983         else
 984                 return IWL_NUM_RX_CHAINS_MULTIPLE;
 985 }
 986
 987 /*
 988  * When we are in power saving, there's no difference between
 989  * using multiple chains or just a single chain, but due to the
 990  * lack of SM PS we lose a lot of throughput if we use just a
 991  * single chain.
 992  *
 993  * Therefore, use the active count here (which will use multiple
 994  * chains unless connected to a legacy AP).
 995  */
 996 static int iwl_get_idle_rx_chain_count(struct iwl_priv *priv, int active_cnt)
 997 {
 998         return active_cnt;
 999 }
1000
1001 /* up to 4 chains */
1002 static u8 iwl_count_chain_bitmap(u32 chain_bitmap)
1003 {
1004         u8 res;
1005         res = (chain_bitmap & BIT(0)) >> 0;
1006         res += (chain_bitmap & BIT(1)) >> 1;
1007         res += (chain_bitmap & BIT(2)) >> 2;
1008         res += (chain_bitmap & BIT(3)) >> 3;
1009         return res;
1010 }
1011
1012 /**
1013  * iwl_is_monitor_mode - Determine if interface in monitor mode
1014  *
1015  * priv->iw_mode is set in add_interface, but add_interface is
1016  * never called for monitor mode. The only way mac80211 informs us about
1017  * monitor mode is through configuring filters (call to configure_filter).
1018  */
1019 bool iwl_is_monitor_mode(struct iwl_priv *priv)
1020 {
1021         return !!(priv->staging_rxon.filter_flags & RXON_FILTER_PROMISC_MSK);
1022 }
1023 EXPORT_SYMBOL(iwl_is_monitor_mode);
1024
1025 /**
1026  * iwl_set_rxon_chain - Set up Rx chain usage in "staging" RXON image
1027  *
1028  * Selects how many and which Rx receivers/antennas/chains to use.
1029  * This should not be used for scan command ... it puts data in wrong place.
1030  */
1031 void iwl_set_rxon_chain(struct iwl_priv *priv)
1032 {
1033         bool is_single = is_single_rx_stream(priv);
1034         bool is_cam = !test_bit(STATUS_POWER_PMI, &priv->status);
1035         u8 idle_rx_cnt, active_rx_cnt, valid_rx_cnt;
1036         u32 active_chains;
1037         u16 rx_chain;
1038
1039         /* Tell uCode which antennas are actually connected.
1040          * Before first association, we assume all antennas are connected.
1041          * Just after first association, iwl_chain_noise_calibration()
1042          *    checks which antennas actually *are* connected. */
1043          if (priv->chain_noise_data.active_chains)
1044                 active_chains = priv->chain_noise_data.active_chains;
1045         else
1046                 active_chains = priv->hw_params.valid_rx_ant;
1047
1048         rx_chain = active_chains << RXON_RX_CHAIN_VALID_POS;
1049
1050         /* How many receivers should we use? */
1051         active_rx_cnt = iwl_get_active_rx_chain_count(priv);
1052         idle_rx_cnt = iwl_get_idle_rx_chain_count(priv, active_rx_cnt);
1053
1054
1055         /* correct rx chain count according hw settings
1056          * and chain noise calibration
1057          */
1058         valid_rx_cnt = iwl_count_chain_bitmap(active_chains);
1059         if (valid_rx_cnt < active_rx_cnt)
1060                 active_rx_cnt = valid_rx_cnt;
1061
1062         if (valid_rx_cnt < idle_rx_cnt)
1063                 idle_rx_cnt = valid_rx_cnt;
1064
1065         rx_chain |= active_rx_cnt << RXON_RX_CHAIN_MIMO_CNT_POS;
1066         rx_chain |= idle_rx_cnt  << RXON_RX_CHAIN_CNT_POS;
1067
1068         /* copied from 'iwl_bg_request_scan()' */
1069         /* Force use of chains B and C (0x6) for Rx for 4965
1070          * Avoid A (0x1) because of its off-channel reception on A-band.
1071          * MIMO is not used here, but value is required */
1072         if (iwl_is_monitor_mode(priv) &&
1073             !(priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) &&
1074             ((priv->hw_rev & CSR_HW_REV_TYPE_MSK) == CSR_HW_REV_TYPE_4965)) {
1075                 rx_chain = ANT_ABC << RXON_RX_CHAIN_VALID_POS;
1076                 rx_chain |= ANT_BC << RXON_RX_CHAIN_FORCE_SEL_POS;
1077                 rx_chain |= ANT_ABC << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS;
1078                 rx_chain |= 0x1 << RXON_RX_CHAIN_DRIVER_FORCE_POS;
1079         }
1080
1081         priv->staging_rxon.rx_chain = cpu_to_le16(rx_chain);
1082
1083         if (!is_single && (active_rx_cnt >= IWL_NUM_RX_CHAINS_SINGLE) && is_cam)
1084                 priv->staging_rxon.rx_chain |= RXON_RX_CHAIN_MIMO_FORCE_MSK;
1085         else
1086                 priv->staging_rxon.rx_chain &= ~RXON_RX_CHAIN_MIMO_FORCE_MSK;
1087
1088         IWL_DEBUG_ASSOC(priv, "rx_chain=0x%X active=%d idle=%d\n",
1089                         priv->staging_rxon.rx_chain,
1090                         active_rx_cnt, idle_rx_cnt);
1091
1092         WARN_ON(active_rx_cnt == 0 || idle_rx_cnt == 0 ||
1093                 active_rx_cnt < idle_rx_cnt);
1094 }
1095 EXPORT_SYMBOL(iwl_set_rxon_chain);
1096
1097 /**
1098  * iwl_set_rxon_channel - Set the phymode and channel values in staging RXON
1099  * @phymode: MODE_IEEE80211A sets to 5.2GHz; all else set to 2.4GHz
1100  * @channel: Any channel valid for the requested phymode
1101
1102  * In addition to setting the staging RXON, priv->phymode is also set.
1103  *
1104  * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
1105  * in the staging RXON flag structure based on the phymode
1106  */
1107 int iwl_set_rxon_channel(struct iwl_priv *priv, struct ieee80211_channel *ch)
1108 {
1109         enum ieee80211_band band = ch->band;
1110         u16 channel = ieee80211_frequency_to_channel(ch->center_freq);
1111
1112         if (!iwl_get_channel_info(priv, band, channel)) {
1113                 IWL_DEBUG_INFO(priv, "Could not set channel to %d [%d]\n",
1114                                channel, band);
1115                 return -EINVAL;
1116         }
1117
1118         if ((le16_to_cpu(priv->staging_rxon.channel) == channel) &&
1119             (priv->band == band))
1120                 return 0;
1121
1122         priv->staging_rxon.channel = cpu_to_le16(channel);
1123         if (band == IEEE80211_BAND_5GHZ)
1124                 priv->staging_rxon.flags &= ~RXON_FLG_BAND_24G_MSK;
1125         else
1126                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
1127
1128         priv->band = band;
1129
1130         IWL_DEBUG_INFO(priv, "Staging channel set to %d [%d]\n", channel, band);
1131
1132         return 0;
1133 }
1134 EXPORT_SYMBOL(iwl_set_rxon_channel);
1135
1136 void iwl_set_flags_for_band(struct iwl_priv *priv,
1137                             enum ieee80211_band band)
1138 {
1139         if (band == IEEE80211_BAND_5GHZ) {
1140                 priv->staging_rxon.flags &=
1141                     ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK
1142                       | RXON_FLG_CCK_MSK);
1143                 priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
1144         } else {
1145                 /* Copied from iwl_post_associate() */
1146                 if (priv->assoc_capability & WLAN_CAPABILITY_SHORT_SLOT_TIME)
1147                         priv->staging_rxon.flags |= RXON_FLG_SHORT_SLOT_MSK;
1148                 else
1149                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
1150
1151                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC)
1152                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
1153
1154                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
1155                 priv->staging_rxon.flags |= RXON_FLG_AUTO_DETECT_MSK;
1156                 priv->staging_rxon.flags &= ~RXON_FLG_CCK_MSK;
1157         }
1158 }
1159
1160 /*
1161  * initialize rxon structure with default values from eeprom
1162  */
1163 void iwl_connection_init_rx_config(struct iwl_priv *priv, int mode)
1164 {
1165         const struct iwl_channel_info *ch_info;
1166
1167         memset(&priv->staging_rxon, 0, sizeof(priv->staging_rxon));
1168
1169         switch (mode) {
1170         case NL80211_IFTYPE_AP:
1171                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_AP;
1172                 break;
1173
1174         case NL80211_IFTYPE_STATION:
1175                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_ESS;
1176                 priv->staging_rxon.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
1177                 break;
1178
1179         case NL80211_IFTYPE_ADHOC:
1180                 priv->staging_rxon.dev_type = RXON_DEV_TYPE_IBSS;
1181                 priv->staging_rxon.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
1182                 priv->staging_rxon.filter_flags = RXON_FILTER_BCON_AWARE_MSK |
1183                                                   RXON_FILTER_ACCEPT_GRP_MSK;
1184                 break;
1185
1186         default:
1187                 IWL_ERR(priv, "Unsupported interface type %d\n", mode);
1188                 break;
1189         }
1190
1191 #if 0
1192         /* TODO:  Figure out when short_preamble would be set and cache from
1193          * that */
1194         if (!hw_to_local(priv->hw)->short_preamble)
1195                 priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
1196         else
1197                 priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
1198 #endif
1199
1200         ch_info = iwl_get_channel_info(priv, priv->band,
1201                                        le16_to_cpu(priv->active_rxon.channel));
1202
1203         if (!ch_info)
1204                 ch_info = &priv->channel_info[0];
1205
1206         /*
1207          * in some case A channels are all non IBSS
1208          * in this case force B/G channel
1209          */
1210         if ((priv->iw_mode == NL80211_IFTYPE_ADHOC) &&
1211             !(is_channel_ibss(ch_info)))
1212                 ch_info = &priv->channel_info[0];
1213
1214         priv->staging_rxon.channel = cpu_to_le16(ch_info->channel);
1215         priv->band = ch_info->band;
1216
1217         iwl_set_flags_for_band(priv, priv->band);
1218
1219         priv->staging_rxon.ofdm_basic_rates =
1220             (IWL_OFDM_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
1221         priv->staging_rxon.cck_basic_rates =
1222             (IWL_CCK_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
1223
1224         /* clear both MIX and PURE40 mode flag */
1225         priv->staging_rxon.flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED |
1226                                         RXON_FLG_CHANNEL_MODE_PURE_40);
1227         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
1228         memcpy(priv->staging_rxon.wlap_bssid_addr, priv->mac_addr, ETH_ALEN);
1229         priv->staging_rxon.ofdm_ht_single_stream_basic_rates = 0xff;
1230         priv->staging_rxon.ofdm_ht_dual_stream_basic_rates = 0xff;
1231         priv->staging_rxon.ofdm_ht_triple_stream_basic_rates = 0xff;
1232 }
1233 EXPORT_SYMBOL(iwl_connection_init_rx_config);
1234
1235 static void iwl_set_rate(struct iwl_priv *priv)
1236 {
1237         const struct ieee80211_supported_band *hw = NULL;
1238         struct ieee80211_rate *rate;
1239         int i;
1240
1241         hw = iwl_get_hw_mode(priv, priv->band);
1242         if (!hw) {
1243                 IWL_ERR(priv, "Failed to set rate: unable to get hw mode\n");
1244                 return;
1245         }
1246
1247         priv->active_rate = 0;
1248         priv->active_rate_basic = 0;
1249
1250         for (i = 0; i < hw->n_bitrates; i++) {
1251                 rate = &(hw->bitrates[i]);
1252                 if (rate->hw_value < IWL_RATE_COUNT_LEGACY)
1253                         priv->active_rate |= (1 << rate->hw_value);
1254         }
1255
1256         IWL_DEBUG_RATE(priv, "Set active_rate = %0x, active_rate_basic = %0x\n",
1257                        priv->active_rate, priv->active_rate_basic);
1258
1259         /*
1260          * If a basic rate is configured, then use it (adding IWL_RATE_1M_MASK)
1261          * otherwise set it to the default of all CCK rates and 6, 12, 24 for
1262          * OFDM
1263          */
1264         if (priv->active_rate_basic & IWL_CCK_BASIC_RATES_MASK)
1265                 priv->staging_rxon.cck_basic_rates =
1266                     ((priv->active_rate_basic &
1267                       IWL_CCK_RATES_MASK) >> IWL_FIRST_CCK_RATE) & 0xF;
1268         else
1269                 priv->staging_rxon.cck_basic_rates =
1270                     (IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
1271
1272         if (priv->active_rate_basic & IWL_OFDM_BASIC_RATES_MASK)
1273                 priv->staging_rxon.ofdm_basic_rates =
1274                     ((priv->active_rate_basic &
1275                       (IWL_OFDM_BASIC_RATES_MASK | IWL_RATE_6M_MASK)) >>
1276                       IWL_FIRST_OFDM_RATE) & 0xFF;
1277         else
1278                 priv->staging_rxon.ofdm_basic_rates =
1279                    (IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
1280 }
1281
1282 void iwl_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
1283 {
1284         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1285         struct iwl_rxon_cmd *rxon = (void *)&priv->active_rxon;
1286         struct iwl_csa_notification *csa = &(pkt->u.csa_notif);
1287         IWL_DEBUG_11H(priv, "CSA notif: channel %d, status %d\n",
1288                       le16_to_cpu(csa->channel), le32_to_cpu(csa->status));
1289         rxon->channel = csa->channel;
1290         priv->staging_rxon.channel = csa->channel;
1291 }
1292 EXPORT_SYMBOL(iwl_rx_csa);
1293
1294 #ifdef CONFIG_IWLWIFI_DEBUG
1295 static void iwl_print_rx_config_cmd(struct iwl_priv *priv)
1296 {
1297         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
1298
1299         IWL_DEBUG_RADIO(priv, "RX CONFIG:\n");
1300         iwl_print_hex_dump(priv, IWL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
1301         IWL_DEBUG_RADIO(priv, "u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
1302         IWL_DEBUG_RADIO(priv, "u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
1303         IWL_DEBUG_RADIO(priv, "u32 filter_flags: 0x%08x\n",
1304                         le32_to_cpu(rxon->filter_flags));
1305         IWL_DEBUG_RADIO(priv, "u8 dev_type: 0x%x\n", rxon->dev_type);
1306         IWL_DEBUG_RADIO(priv, "u8 ofdm_basic_rates: 0x%02x\n",
1307                         rxon->ofdm_basic_rates);
1308         IWL_DEBUG_RADIO(priv, "u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
1309         IWL_DEBUG_RADIO(priv, "u8[6] node_addr: %pM\n", rxon->node_addr);
1310         IWL_DEBUG_RADIO(priv, "u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
1311         IWL_DEBUG_RADIO(priv, "u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
1312 }
1313 #endif
1314 /**
1315  * iwl_irq_handle_error - called for HW or SW error interrupt from card
1316  */
1317 void iwl_irq_handle_error(struct iwl_priv *priv)
1318 {
1319         /* Set the FW error flag -- cleared on iwl_down */
1320         set_bit(STATUS_FW_ERROR, &priv->status);
1321
1322         /* Cancel currently queued command. */
1323         clear_bit(STATUS_HCMD_ACTIVE, &priv->status);
1324
1325 #ifdef CONFIG_IWLWIFI_DEBUG
1326         if (iwl_get_debug_level(priv) & IWL_DL_FW_ERRORS) {
1327                 priv->cfg->ops->lib->dump_nic_error_log(priv);
1328                 priv->cfg->ops->lib->dump_nic_event_log(priv);
1329                 iwl_print_rx_config_cmd(priv);
1330         }
1331 #endif
1332
1333         wake_up_interruptible(&priv->wait_command_queue);
1334
1335         /* Keep the restart process from trying to send host
1336          * commands by clearing the INIT status bit */
1337         clear_bit(STATUS_READY, &priv->status);
1338
1339         if (!test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1340                 IWL_DEBUG(priv, IWL_DL_FW_ERRORS,
1341                           "Restarting adapter due to uCode error.\n");
1342
1343                 if (priv->cfg->mod_params->restart_fw)
1344                         queue_work(priv->workqueue, &priv->restart);
1345         }
1346 }
1347 EXPORT_SYMBOL(iwl_irq_handle_error);
1348
1349 int iwl_apm_stop_master(struct iwl_priv *priv)
1350 {
1351         unsigned long flags;
1352
1353         spin_lock_irqsave(&priv->lock, flags);
1354
1355         /* set stop master bit */
1356         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
1357
1358         iwl_poll_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_MASTER_DISABLED,
1359                         CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
1360
1361         spin_unlock_irqrestore(&priv->lock, flags);
1362         IWL_DEBUG_INFO(priv, "stop master\n");
1363
1364         return 0;
1365 }
1366 EXPORT_SYMBOL(iwl_apm_stop_master);
1367
1368 void iwl_apm_stop(struct iwl_priv *priv)
1369 {
1370         unsigned long flags;
1371
1372         IWL_DEBUG_INFO(priv, "Stop card, put in low power state\n");
1373
1374         iwl_apm_stop_master(priv);
1375
1376         spin_lock_irqsave(&priv->lock, flags);
1377
1378         iwl_set_bit(priv, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
1379
1380         udelay(10);
1381         /* clear "init complete"  move adapter D0A* --> D0U state */
1382         iwl_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1383         spin_unlock_irqrestore(&priv->lock, flags);
1384 }
1385 EXPORT_SYMBOL(iwl_apm_stop);
1386
1387
1388 /*
1389  * Start up NIC's basic functionality after it has been reset
1390  * (e.g. after platform boot, or shutdown via iwl_apm_stop())
1391  * NOTE:  This does not load uCode nor start the embedded processor
1392  */
1393 int iwl_apm_init(struct iwl_priv *priv)
1394 {
1395         int ret = 0;
1396         u16 lctl;
1397
1398         IWL_DEBUG_INFO(priv, "Init card's basic functions\n");
1399
1400         /*
1401          * Use "set_bit" below rather than "write", to preserve any hardware
1402          * bits already set by default after reset.
1403          */
1404
1405         /* Disable L0S exit timer (platform NMI Work/Around) */
1406         iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
1407                           CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
1408
1409         /*
1410          * Disable L0s without affecting L1;
1411          *  don't wait for ICH L0s (ICH bug W/A)
1412          */
1413         iwl_set_bit(priv, CSR_GIO_CHICKEN_BITS,
1414                           CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
1415
1416         /* Set FH wait threshold to maximum (HW error during stress W/A) */
1417         iwl_set_bit(priv, CSR_DBG_HPET_MEM_REG, CSR_DBG_HPET_MEM_REG_VAL);
1418
1419         /*
1420          * Enable HAP INTA (interrupt from management bus) to
1421          * wake device's PCI Express link L1a -> L0s
1422          * NOTE:  This is no-op for 3945 (non-existant bit)
1423          */
1424         iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
1425                                     CSR_HW_IF_CONFIG_REG_BIT_HAP_WAKE_L1A);
1426
1427         /*
1428          * HW bug W/A - costs negligible power consumption ...
1429          * Check if BIOS (or OS) enabled L1-ASPM on this device
1430          */
1431         if (priv->cfg->set_l0s) {
1432                 lctl = iwl_pcie_link_ctl(priv);
1433                 if ((lctl & PCI_CFG_LINK_CTRL_VAL_L1_EN) ==
1434                                         PCI_CFG_LINK_CTRL_VAL_L1_EN) {
1435                         /* L1-ASPM enabled; disable(!) L0S  */
1436                         iwl_set_bit(priv, CSR_GIO_REG,
1437                                         CSR_GIO_REG_VAL_L0S_ENABLED);
1438                         IWL_DEBUG_POWER(priv, "L1 Enabled; Disabling L0S\n");
1439                 } else {
1440                         /* L1-ASPM disabled; enable(!) L0S */
1441                         iwl_clear_bit(priv, CSR_GIO_REG,
1442                                         CSR_GIO_REG_VAL_L0S_ENABLED);
1443                         IWL_DEBUG_POWER(priv, "L1 Disabled; Enabling L0S\n");
1444                 }
1445         }
1446
1447         /* Configure analog phase-lock-loop before activating to D0A */
1448         if (priv->cfg->pll_cfg_val)
1449                 iwl_set_bit(priv, CSR_ANA_PLL_CFG, priv->cfg->pll_cfg_val);
1450
1451         /*
1452          * Set "initialization complete" bit to move adapter from
1453          * D0U* --> D0A* (powered-up active) state.
1454          */
1455         iwl_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
1456
1457         /*
1458          * Wait for clock stabilization; once stabilized, access to
1459          * device-internal resources is supported, e.g. iwl_write_prph()
1460          * and accesses to uCode SRAM.
1461          */
1462         ret = iwl_poll_bit(priv, CSR_GP_CNTRL,
1463                         CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
1464                         CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
1465         if (ret < 0) {
1466                 IWL_DEBUG_INFO(priv, "Failed to init the card\n");
1467                 goto out;
1468         }
1469
1470         /*
1471          * Enable DMA and BSM (if used) clocks, wait for them to stabilize.
1472          * BSM (Boostrap State Machine) is only in 3945 and 4965;
1473          * later devices (i.e. 5000 and later) have non-volatile SRAM,
1474          * and don't need BSM to restore data after power-saving sleep.
1475          *
1476          * Write to "CLK_EN_REG"; "1" bits enable clocks, while "0" bits
1477          * do not disable clocks.  This preserves any hardware bits already
1478          * set by default in "CLK_CTRL_REG" after reset.
1479          */
1480         if (priv->cfg->use_bsm)
1481                 iwl_write_prph(priv, APMG_CLK_EN_REG,
1482                         APMG_CLK_VAL_DMA_CLK_RQT | APMG_CLK_VAL_BSM_CLK_RQT);
1483         else
1484                 iwl_write_prph(priv, APMG_CLK_EN_REG,
1485                         APMG_CLK_VAL_DMA_CLK_RQT);
1486         udelay(20);
1487
1488         /* Disable L1-Active */
1489         iwl_set_bits_prph(priv, APMG_PCIDEV_STT_REG,
1490                           APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
1491
1492 out:
1493         return ret;
1494 }
1495 EXPORT_SYMBOL(iwl_apm_init);
1496
1497
1498
1499 void iwl_configure_filter(struct ieee80211_hw *hw,
1500                           unsigned int changed_flags,
1501                           unsigned int *total_flags,
1502                           u64 multicast)
1503 {
1504         struct iwl_priv *priv = hw->priv;
1505         __le32 *filter_flags = &priv->staging_rxon.filter_flags;
1506
1507         IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
1508                         changed_flags, *total_flags);
1509
1510         if (changed_flags & (FIF_OTHER_BSS | FIF_PROMISC_IN_BSS)) {
1511                 if (*total_flags & (FIF_OTHER_BSS | FIF_PROMISC_IN_BSS))
1512                         *filter_flags |= RXON_FILTER_PROMISC_MSK;
1513                 else
1514                         *filter_flags &= ~RXON_FILTER_PROMISC_MSK;
1515         }
1516         if (changed_flags & FIF_ALLMULTI) {
1517                 if (*total_flags & FIF_ALLMULTI)
1518                         *filter_flags |= RXON_FILTER_ACCEPT_GRP_MSK;
1519                 else
1520                         *filter_flags &= ~RXON_FILTER_ACCEPT_GRP_MSK;
1521         }
1522         if (changed_flags & FIF_CONTROL) {
1523                 if (*total_flags & FIF_CONTROL)
1524                         *filter_flags |= RXON_FILTER_CTL2HOST_MSK;
1525                 else
1526                         *filter_flags &= ~RXON_FILTER_CTL2HOST_MSK;
1527         }
1528         if (changed_flags & FIF_BCN_PRBRESP_PROMISC) {
1529                 if (*total_flags & FIF_BCN_PRBRESP_PROMISC)
1530                         *filter_flags |= RXON_FILTER_BCON_AWARE_MSK;
1531                 else
1532                         *filter_flags &= ~RXON_FILTER_BCON_AWARE_MSK;
1533         }
1534
1535         /* We avoid iwl_commit_rxon here to commit the new filter flags
1536          * since mac80211 will call ieee80211_hw_config immediately.
1537          * (mc_list is not supported at this time). Otherwise, we need to
1538          * queue a background iwl_commit_rxon work.
1539          */
1540
1541         *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
1542                         FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
1543 }
1544 EXPORT_SYMBOL(iwl_configure_filter);
1545
1546 int iwl_set_hw_params(struct iwl_priv *priv)
1547 {
1548         priv->hw_params.max_rxq_size = RX_QUEUE_SIZE;
1549         priv->hw_params.max_rxq_log = RX_QUEUE_SIZE_LOG;
1550         if (priv->cfg->mod_params->amsdu_size_8K)
1551                 priv->hw_params.rx_page_order = get_order(IWL_RX_BUF_SIZE_8K);
1552         else
1553                 priv->hw_params.rx_page_order = get_order(IWL_RX_BUF_SIZE_4K);
1554
1555         priv->hw_params.max_beacon_itrvl = IWL_MAX_UCODE_BEACON_INTERVAL;
1556
1557         if (priv->cfg->mod_params->disable_11n)
1558                 priv->cfg->sku &= ~IWL_SKU_N;
1559
1560         /* Device-specific setup */
1561         return priv->cfg->ops->lib->set_hw_params(priv);
1562 }
1563 EXPORT_SYMBOL(iwl_set_hw_params);
1564
1565 int iwl_init_drv(struct iwl_priv *priv)
1566 {
1567         int ret;
1568
1569         priv->ibss_beacon = NULL;
1570
1571         spin_lock_init(&priv->lock);
1572         spin_lock_init(&priv->sta_lock);
1573         spin_lock_init(&priv->hcmd_lock);
1574
1575         INIT_LIST_HEAD(&priv->free_frames);
1576
1577         mutex_init(&priv->mutex);
1578
1579         /* Clear the driver's (not device's) station table */
1580         iwl_clear_stations_table(priv);
1581
1582         priv->ieee_channels = NULL;
1583         priv->ieee_rates = NULL;
1584         priv->band = IEEE80211_BAND_2GHZ;
1585
1586         priv->iw_mode = NL80211_IFTYPE_STATION;
1587
1588         /* Choose which receivers/antennas to use */
1589         if (priv->cfg->ops->hcmd->set_rxon_chain)
1590                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
1591
1592         iwl_init_scan_params(priv);
1593
1594         iwl_reset_qos(priv);
1595
1596         priv->qos_data.qos_active = 0;
1597         priv->qos_data.qos_cap.val = 0;
1598
1599         priv->rates_mask = IWL_RATES_MASK;
1600         /* Set the tx_power_user_lmt to the lowest power level
1601          * this value will get overwritten by channel max power avg
1602          * from eeprom */
1603         priv->tx_power_user_lmt = IWL_TX_POWER_TARGET_POWER_MIN;
1604
1605         ret = iwl_init_channel_map(priv);
1606         if (ret) {
1607                 IWL_ERR(priv, "initializing regulatory failed: %d\n", ret);
1608                 goto err;
1609         }
1610
1611         ret = iwlcore_init_geos(priv);
1612         if (ret) {
1613                 IWL_ERR(priv, "initializing geos failed: %d\n", ret);
1614                 goto err_free_channel_map;
1615         }
1616         iwlcore_init_hw_rates(priv, priv->ieee_rates);
1617
1618         return 0;
1619
1620 err_free_channel_map:
1621         iwl_free_channel_map(priv);
1622 err:
1623         return ret;
1624 }
1625 EXPORT_SYMBOL(iwl_init_drv);
1626
1627 int iwl_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force)
1628 {
1629         int ret = 0;
1630         s8 prev_tx_power = priv->tx_power_user_lmt;
1631
1632         if (tx_power < IWL_TX_POWER_TARGET_POWER_MIN) {
1633                 IWL_WARN(priv, "Requested user TXPOWER %d below lower limit %d.\n",
1634                          tx_power,
1635                          IWL_TX_POWER_TARGET_POWER_MIN);
1636                 return -EINVAL;
1637         }
1638
1639         if (tx_power > priv->tx_power_device_lmt) {
1640                 IWL_WARN(priv,
1641                         "Requested user TXPOWER %d above upper limit %d.\n",
1642                          tx_power, priv->tx_power_device_lmt);
1643                 return -EINVAL;
1644         }
1645
1646         if (priv->tx_power_user_lmt != tx_power)
1647                 force = true;
1648
1649         /* if nic is not up don't send command */
1650         if (iwl_is_ready_rf(priv)) {
1651                 priv->tx_power_user_lmt = tx_power;
1652                 if (force && priv->cfg->ops->lib->send_tx_power)
1653                         ret = priv->cfg->ops->lib->send_tx_power(priv);
1654                 else if (!priv->cfg->ops->lib->send_tx_power)
1655                         ret = -EOPNOTSUPP;
1656                 /*
1657                  * if fail to set tx_power, restore the orig. tx power
1658                  */
1659                 if (ret)
1660                         priv->tx_power_user_lmt = prev_tx_power;
1661         }
1662
1663         /*
1664          * Even this is an async host command, the command
1665          * will always report success from uCode
1666          * So once driver can placing the command into the queue
1667          * successfully, driver can use priv->tx_power_user_lmt
1668          * to reflect the current tx power
1669          */
1670         return ret;
1671 }
1672 EXPORT_SYMBOL(iwl_set_tx_power);
1673
1674 void iwl_uninit_drv(struct iwl_priv *priv)
1675 {
1676         iwl_calib_free_results(priv);
1677         iwlcore_free_geos(priv);
1678         iwl_free_channel_map(priv);
1679         kfree(priv->scan);
1680 }
1681 EXPORT_SYMBOL(iwl_uninit_drv);
1682
1683 #define ICT_COUNT (PAGE_SIZE/sizeof(u32))
1684
1685 /* Free dram table */
1686 void iwl_free_isr_ict(struct iwl_priv *priv)
1687 {
1688         if (priv->ict_tbl_vir) {
1689                 pci_free_consistent(priv->pci_dev, (sizeof(u32) * ICT_COUNT) +
1690                                         PAGE_SIZE, priv->ict_tbl_vir,
1691                                         priv->ict_tbl_dma);
1692                 priv->ict_tbl_vir = NULL;
1693         }
1694 }
1695 EXPORT_SYMBOL(iwl_free_isr_ict);
1696
1697
1698 /* allocate dram shared table it is a PAGE_SIZE aligned
1699  * also reset all data related to ICT table interrupt.
1700  */
1701 int iwl_alloc_isr_ict(struct iwl_priv *priv)
1702 {
1703
1704         if (priv->cfg->use_isr_legacy)
1705                 return 0;
1706         /* allocate shrared data table */
1707         priv->ict_tbl_vir = pci_alloc_consistent(priv->pci_dev, (sizeof(u32) *
1708                                                   ICT_COUNT) + PAGE_SIZE,
1709                                                   &priv->ict_tbl_dma);
1710         if (!priv->ict_tbl_vir)
1711                 return -ENOMEM;
1712
1713         /* align table to PAGE_SIZE boundry */
1714         priv->aligned_ict_tbl_dma = ALIGN(priv->ict_tbl_dma, PAGE_SIZE);
1715
1716         IWL_DEBUG_ISR(priv, "ict dma addr %Lx dma aligned %Lx diff %d\n",
1717                              (unsigned long long)priv->ict_tbl_dma,
1718                              (unsigned long long)priv->aligned_ict_tbl_dma,
1719                         (int)(priv->aligned_ict_tbl_dma - priv->ict_tbl_dma));
1720
1721         priv->ict_tbl =  priv->ict_tbl_vir +
1722                           (priv->aligned_ict_tbl_dma - priv->ict_tbl_dma);
1723
1724         IWL_DEBUG_ISR(priv, "ict vir addr %p vir aligned %p diff %d\n",
1725                              priv->ict_tbl, priv->ict_tbl_vir,
1726                         (int)(priv->aligned_ict_tbl_dma - priv->ict_tbl_dma));
1727
1728         /* reset table and index to all 0 */
1729         memset(priv->ict_tbl_vir,0, (sizeof(u32) * ICT_COUNT) + PAGE_SIZE);
1730         priv->ict_index = 0;
1731
1732         /* add periodic RX interrupt */
1733         priv->inta_mask |= CSR_INT_BIT_RX_PERIODIC;
1734         return 0;
1735 }
1736 EXPORT_SYMBOL(iwl_alloc_isr_ict);
1737
1738 /* Device is going up inform it about using ICT interrupt table,
1739  * also we need to tell the driver to start using ICT interrupt.
1740  */
1741 int iwl_reset_ict(struct iwl_priv *priv)
1742 {
1743         u32 val;
1744         unsigned long flags;
1745
1746         if (!priv->ict_tbl_vir)
1747                 return 0;
1748
1749         spin_lock_irqsave(&priv->lock, flags);
1750         iwl_disable_interrupts(priv);
1751
1752         memset(&priv->ict_tbl[0], 0, sizeof(u32) * ICT_COUNT);
1753
1754         val = priv->aligned_ict_tbl_dma >> PAGE_SHIFT;
1755
1756         val |= CSR_DRAM_INT_TBL_ENABLE;
1757         val |= CSR_DRAM_INIT_TBL_WRAP_CHECK;
1758
1759         IWL_DEBUG_ISR(priv, "CSR_DRAM_INT_TBL_REG =0x%X "
1760                         "aligned dma address %Lx\n",
1761                         val, (unsigned long long)priv->aligned_ict_tbl_dma);
1762
1763         iwl_write32(priv, CSR_DRAM_INT_TBL_REG, val);
1764         priv->use_ict = true;
1765         priv->ict_index = 0;
1766         iwl_write32(priv, CSR_INT, priv->inta_mask);
1767         iwl_enable_interrupts(priv);
1768         spin_unlock_irqrestore(&priv->lock, flags);
1769
1770         return 0;
1771 }
1772 EXPORT_SYMBOL(iwl_reset_ict);
1773
1774 /* Device is going down disable ict interrupt usage */
1775 void iwl_disable_ict(struct iwl_priv *priv)
1776 {
1777         unsigned long flags;
1778
1779         spin_lock_irqsave(&priv->lock, flags);
1780         priv->use_ict = false;
1781         spin_unlock_irqrestore(&priv->lock, flags);
1782 }
1783 EXPORT_SYMBOL(iwl_disable_ict);
1784
1785 /* interrupt handler using ict table, with this interrupt driver will
1786  * stop using INTA register to get device's interrupt, reading this register
1787  * is expensive, device will write interrupts in ICT dram table, increment
1788  * index then will fire interrupt to driver, driver will OR all ICT table
1789  * entries from current index up to table entry with 0 value. the result is
1790  * the interrupt we need to service, driver will set the entries back to 0 and
1791  * set index.
1792  */
1793 irqreturn_t iwl_isr_ict(int irq, void *data)
1794 {
1795         struct iwl_priv *priv = data;
1796         u32 inta, inta_mask;
1797         u32 val = 0;
1798
1799         if (!priv)
1800                 return IRQ_NONE;
1801
1802         /* dram interrupt table not set yet,
1803          * use legacy interrupt.
1804          */
1805         if (!priv->use_ict)
1806                 return iwl_isr(irq, data);
1807
1808         spin_lock(&priv->lock);
1809
1810         /* Disable (but don't clear!) interrupts here to avoid
1811          * back-to-back ISRs and sporadic interrupts from our NIC.
1812          * If we have something to service, the tasklet will re-enable ints.
1813          * If we *don't* have something, we'll re-enable before leaving here.
1814          */
1815         inta_mask = iwl_read32(priv, CSR_INT_MASK);  /* just for debug */
1816         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
1817
1818
1819         /* Ignore interrupt if there's nothing in NIC to service.
1820          * This may be due to IRQ shared with another device,
1821          * or due to sporadic interrupts thrown from our NIC. */
1822         if (!priv->ict_tbl[priv->ict_index]) {
1823                 IWL_DEBUG_ISR(priv, "Ignore interrupt, inta == 0\n");
1824                 goto none;
1825         }
1826
1827         /* read all entries that not 0 start with ict_index */
1828         while (priv->ict_tbl[priv->ict_index]) {
1829
1830                 val |= le32_to_cpu(priv->ict_tbl[priv->ict_index]);
1831                 IWL_DEBUG_ISR(priv, "ICT index %d value 0x%08X\n",
1832                                 priv->ict_index,
1833                                 le32_to_cpu(priv->ict_tbl[priv->ict_index]));
1834                 priv->ict_tbl[priv->ict_index] = 0;
1835                 priv->ict_index = iwl_queue_inc_wrap(priv->ict_index,
1836                                                      ICT_COUNT);
1837
1838         }
1839
1840         /* We should not get this value, just ignore it. */
1841         if (val == 0xffffffff)
1842                 val = 0;
1843
1844         inta = (0xff & val) | ((0xff00 & val) << 16);
1845         IWL_DEBUG_ISR(priv, "ISR inta 0x%08x, enabled 0x%08x ict 0x%08x\n",
1846                         inta, inta_mask, val);
1847
1848         inta &= priv->inta_mask;
1849         priv->inta |= inta;
1850
1851         /* iwl_irq_tasklet() will service interrupts and re-enable them */
1852         if (likely(inta))
1853                 tasklet_schedule(&priv->irq_tasklet);
1854         else if (test_bit(STATUS_INT_ENABLED, &priv->status) && !priv->inta) {
1855                 /* Allow interrupt if was disabled by this handler and
1856                  * no tasklet was schedules, We should not enable interrupt,
1857                  * tasklet will enable it.
1858                  */
1859                 iwl_enable_interrupts(priv);
1860         }
1861
1862         spin_unlock(&priv->lock);
1863         return IRQ_HANDLED;
1864
1865  none:
1866         /* re-enable interrupts here since we don't have anything to service.
1867          * only Re-enable if disabled by irq.
1868          */
1869         if (test_bit(STATUS_INT_ENABLED, &priv->status) && !priv->inta)
1870                 iwl_enable_interrupts(priv);
1871
1872         spin_unlock(&priv->lock);
1873         return IRQ_NONE;
1874 }
1875 EXPORT_SYMBOL(iwl_isr_ict);
1876
1877
1878 static irqreturn_t iwl_isr(int irq, void *data)
1879 {
1880         struct iwl_priv *priv = data;
1881         u32 inta, inta_mask;
1882 #ifdef CONFIG_IWLWIFI_DEBUG
1883         u32 inta_fh;
1884 #endif
1885         if (!priv)
1886                 return IRQ_NONE;
1887
1888         spin_lock(&priv->lock);
1889
1890         /* Disable (but don't clear!) interrupts here to avoid
1891          *    back-to-back ISRs and sporadic interrupts from our NIC.
1892          * If we have something to service, the tasklet will re-enable ints.
1893          * If we *don't* have something, we'll re-enable before leaving here. */
1894         inta_mask = iwl_read32(priv, CSR_INT_MASK);  /* just for debug */
1895         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
1896
1897         /* Discover which interrupts are active/pending */
1898         inta = iwl_read32(priv, CSR_INT);
1899
1900         /* Ignore interrupt if there's nothing in NIC to service.
1901          * This may be due to IRQ shared with another device,
1902          * or due to sporadic interrupts thrown from our NIC. */
1903         if (!inta) {
1904                 IWL_DEBUG_ISR(priv, "Ignore interrupt, inta == 0\n");
1905                 goto none;
1906         }
1907
1908         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
1909                 /* Hardware disappeared. It might have already raised
1910                  * an interrupt */
1911                 IWL_WARN(priv, "HARDWARE GONE?? INTA == 0x%08x\n", inta);
1912                 goto unplugged;
1913         }
1914
1915 #ifdef CONFIG_IWLWIFI_DEBUG
1916         if (iwl_get_debug_level(priv) & (IWL_DL_ISR)) {
1917                 inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1918                 IWL_DEBUG_ISR(priv, "ISR inta 0x%08x, enabled 0x%08x, "
1919                               "fh 0x%08x\n", inta, inta_mask, inta_fh);
1920         }
1921 #endif
1922
1923         priv->inta |= inta;
1924         /* iwl_irq_tasklet() will service interrupts and re-enable them */
1925         if (likely(inta))
1926                 tasklet_schedule(&priv->irq_tasklet);
1927         else if (test_bit(STATUS_INT_ENABLED, &priv->status) && !priv->inta)
1928                 iwl_enable_interrupts(priv);
1929
1930  unplugged:
1931         spin_unlock(&priv->lock);
1932         return IRQ_HANDLED;
1933
1934  none:
1935         /* re-enable interrupts here since we don't have anything to service. */
1936         /* only Re-enable if diabled by irq  and no schedules tasklet. */
1937         if (test_bit(STATUS_INT_ENABLED, &priv->status) && !priv->inta)
1938                 iwl_enable_interrupts(priv);
1939
1940         spin_unlock(&priv->lock);
1941         return IRQ_NONE;
1942 }
1943
1944 irqreturn_t iwl_isr_legacy(int irq, void *data)
1945 {
1946         struct iwl_priv *priv = data;
1947         u32 inta, inta_mask;
1948         u32 inta_fh;
1949         if (!priv)
1950                 return IRQ_NONE;
1951
1952         spin_lock(&priv->lock);
1953
1954         /* Disable (but don't clear!) interrupts here to avoid
1955          *    back-to-back ISRs and sporadic interrupts from our NIC.
1956          * If we have something to service, the tasklet will re-enable ints.
1957          * If we *don't* have something, we'll re-enable before leaving here. */
1958         inta_mask = iwl_read32(priv, CSR_INT_MASK);  /* just for debug */
1959         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
1960
1961         /* Discover which interrupts are active/pending */
1962         inta = iwl_read32(priv, CSR_INT);
1963         inta_fh = iwl_read32(priv, CSR_FH_INT_STATUS);
1964
1965         /* Ignore interrupt if there's nothing in NIC to service.
1966          * This may be due to IRQ shared with another device,
1967          * or due to sporadic interrupts thrown from our NIC. */
1968         if (!inta && !inta_fh) {
1969                 IWL_DEBUG_ISR(priv, "Ignore interrupt, inta == 0, inta_fh == 0\n");
1970                 goto none;
1971         }
1972
1973         if ((inta == 0xFFFFFFFF) || ((inta & 0xFFFFFFF0) == 0xa5a5a5a0)) {
1974                 /* Hardware disappeared. It might have already raised
1975                  * an interrupt */
1976                 IWL_WARN(priv, "HARDWARE GONE?? INTA == 0x%08x\n", inta);
1977                 goto unplugged;
1978         }
1979
1980         IWL_DEBUG_ISR(priv, "ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
1981                       inta, inta_mask, inta_fh);
1982
1983         inta &= ~CSR_INT_BIT_SCD;
1984
1985         /* iwl_irq_tasklet() will service interrupts and re-enable them */
1986         if (likely(inta || inta_fh))
1987                 tasklet_schedule(&priv->irq_tasklet);
1988
1989  unplugged:
1990         spin_unlock(&priv->lock);
1991         return IRQ_HANDLED;
1992
1993  none:
1994         /* re-enable interrupts here since we don't have anything to service. */
1995         /* only Re-enable if diabled by irq */
1996         if (test_bit(STATUS_INT_ENABLED, &priv->status))
1997                 iwl_enable_interrupts(priv);
1998         spin_unlock(&priv->lock);
1999         return IRQ_NONE;
2000 }
2001 EXPORT_SYMBOL(iwl_isr_legacy);
2002
2003 int iwl_send_bt_config(struct iwl_priv *priv)
2004 {
2005         struct iwl_bt_cmd bt_cmd = {
2006                 .flags = BT_COEX_MODE_4W,
2007                 .lead_time = BT_LEAD_TIME_DEF,
2008                 .max_kill = BT_MAX_KILL_DEF,
2009                 .kill_ack_mask = 0,
2010                 .kill_cts_mask = 0,
2011         };
2012
2013         return iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG,
2014                                 sizeof(struct iwl_bt_cmd), &bt_cmd);
2015 }
2016 EXPORT_SYMBOL(iwl_send_bt_config);
2017
2018 int iwl_send_statistics_request(struct iwl_priv *priv, u8 flags)
2019 {
2020         u32 stat_flags = 0;
2021         struct iwl_host_cmd cmd = {
2022                 .id = REPLY_STATISTICS_CMD,
2023                 .flags = flags,
2024                 .len = sizeof(stat_flags),
2025                 .data = (u8 *) &stat_flags,
2026         };
2027         return iwl_send_cmd(priv, &cmd);
2028 }
2029 EXPORT_SYMBOL(iwl_send_statistics_request);
2030
2031 /**
2032  * iwl_verify_inst_sparse - verify runtime uCode image in card vs. host,
2033  *   using sample data 100 bytes apart.  If these sample points are good,
2034  *   it's a pretty good bet that everything between them is good, too.
2035  */
2036 static int iwlcore_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
2037 {
2038         u32 val;
2039         int ret = 0;
2040         u32 errcnt = 0;
2041         u32 i;
2042
2043         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
2044
2045         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
2046                 /* read data comes through single port, auto-incr addr */
2047                 /* NOTE: Use the debugless read so we don't flood kernel log
2048                  * if IWL_DL_IO is set */
2049                 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
2050                         i + IWL49_RTC_INST_LOWER_BOUND);
2051                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
2052                 if (val != le32_to_cpu(*image)) {
2053                         ret = -EIO;
2054                         errcnt++;
2055                         if (errcnt >= 3)
2056                                 break;
2057                 }
2058         }
2059
2060         return ret;
2061 }
2062
2063 /**
2064  * iwlcore_verify_inst_full - verify runtime uCode image in card vs. host,
2065  *     looking at all data.
2066  */
2067 static int iwl_verify_inst_full(struct iwl_priv *priv, __le32 *image,
2068                                  u32 len)
2069 {
2070         u32 val;
2071         u32 save_len = len;
2072         int ret = 0;
2073         u32 errcnt;
2074
2075         IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
2076
2077         iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
2078                            IWL49_RTC_INST_LOWER_BOUND);
2079
2080         errcnt = 0;
2081         for (; len > 0; len -= sizeof(u32), image++) {
2082                 /* read data comes through single port, auto-incr addr */
2083                 /* NOTE: Use the debugless read so we don't flood kernel log
2084                  * if IWL_DL_IO is set */
2085                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
2086                 if (val != le32_to_cpu(*image)) {
2087                         IWL_ERR(priv, "uCode INST section is invalid at "
2088                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
2089                                   save_len - len, val, le32_to_cpu(*image));
2090                         ret = -EIO;
2091                         errcnt++;
2092                         if (errcnt >= 20)
2093                                 break;
2094                 }
2095         }
2096
2097         if (!errcnt)
2098                 IWL_DEBUG_INFO(priv,
2099                     "ucode image in INSTRUCTION memory is good\n");
2100
2101         return ret;
2102 }
2103
2104 /**
2105  * iwl_verify_ucode - determine which instruction image is in SRAM,
2106  *    and verify its contents
2107  */
2108 int iwl_verify_ucode(struct iwl_priv *priv)
2109 {
2110         __le32 *image;
2111         u32 len;
2112         int ret;
2113
2114         /* Try bootstrap */
2115         image = (__le32 *)priv->ucode_boot.v_addr;
2116         len = priv->ucode_boot.len;
2117         ret = iwlcore_verify_inst_sparse(priv, image, len);
2118         if (!ret) {
2119                 IWL_DEBUG_INFO(priv, "Bootstrap uCode is good in inst SRAM\n");
2120                 return 0;
2121         }
2122
2123         /* Try initialize */
2124         image = (__le32 *)priv->ucode_init.v_addr;
2125         len = priv->ucode_init.len;
2126         ret = iwlcore_verify_inst_sparse(priv, image, len);
2127         if (!ret) {
2128                 IWL_DEBUG_INFO(priv, "Initialize uCode is good in inst SRAM\n");
2129                 return 0;
2130         }
2131
2132         /* Try runtime/protocol */
2133         image = (__le32 *)priv->ucode_code.v_addr;
2134         len = priv->ucode_code.len;
2135         ret = iwlcore_verify_inst_sparse(priv, image, len);
2136         if (!ret) {
2137                 IWL_DEBUG_INFO(priv, "Runtime uCode is good in inst SRAM\n");
2138                 return 0;
2139         }
2140
2141         IWL_ERR(priv, "NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
2142
2143         /* Since nothing seems to match, show first several data entries in
2144          * instruction SRAM, so maybe visual inspection will give a clue.
2145          * Selection of bootstrap image (vs. other images) is arbitrary. */
2146         image = (__le32 *)priv->ucode_boot.v_addr;
2147         len = priv->ucode_boot.len;
2148         ret = iwl_verify_inst_full(priv, image, len);
2149
2150         return ret;
2151 }
2152 EXPORT_SYMBOL(iwl_verify_ucode);
2153
2154
2155 void iwl_rf_kill_ct_config(struct iwl_priv *priv)
2156 {
2157         struct iwl_ct_kill_config cmd;
2158         struct iwl_ct_kill_throttling_config adv_cmd;
2159         unsigned long flags;
2160         int ret = 0;
2161
2162         spin_lock_irqsave(&priv->lock, flags);
2163         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
2164                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
2165         spin_unlock_irqrestore(&priv->lock, flags);
2166         priv->thermal_throttle.ct_kill_toggle = false;
2167
2168         if (priv->cfg->support_ct_kill_exit) {
2169                 adv_cmd.critical_temperature_enter =
2170                         cpu_to_le32(priv->hw_params.ct_kill_threshold);
2171                 adv_cmd.critical_temperature_exit =
2172                         cpu_to_le32(priv->hw_params.ct_kill_exit_threshold);
2173
2174                 ret = iwl_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD,
2175                                        sizeof(adv_cmd), &adv_cmd);
2176                 if (ret)
2177                         IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
2178                 else
2179                         IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
2180                                         "succeeded, "
2181                                         "critical temperature enter is %d,"
2182                                         "exit is %d\n",
2183                                        priv->hw_params.ct_kill_threshold,
2184                                        priv->hw_params.ct_kill_exit_threshold);
2185         } else {
2186                 cmd.critical_temperature_R =
2187                         cpu_to_le32(priv->hw_params.ct_kill_threshold);
2188
2189                 ret = iwl_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD,
2190                                        sizeof(cmd), &cmd);
2191                 if (ret)
2192                         IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
2193                 else
2194                         IWL_DEBUG_INFO(priv, "REPLY_CT_KILL_CONFIG_CMD "
2195                                         "succeeded, "
2196                                         "critical temperature is %d\n",
2197                                         priv->hw_params.ct_kill_threshold);
2198         }
2199 }
2200 EXPORT_SYMBOL(iwl_rf_kill_ct_config);
2201
2202
2203 /*
2204  * CARD_STATE_CMD
2205  *
2206  * Use: Sets the device's internal card state to enable, disable, or halt
2207  *
2208  * When in the 'enable' state the card operates as normal.
2209  * When in the 'disable' state, the card enters into a low power mode.
2210  * When in the 'halt' state, the card is shut down and must be fully
2211  * restarted to come back on.
2212  */
2213 int iwl_send_card_state(struct iwl_priv *priv, u32 flags, u8 meta_flag)
2214 {
2215         struct iwl_host_cmd cmd = {
2216                 .id = REPLY_CARD_STATE_CMD,
2217                 .len = sizeof(u32),
2218                 .data = &flags,
2219                 .flags = meta_flag,
2220         };
2221
2222         return iwl_send_cmd(priv, &cmd);
2223 }
2224
2225 void iwl_rx_pm_sleep_notif(struct iwl_priv *priv,
2226                            struct iwl_rx_mem_buffer *rxb)
2227 {
2228 #ifdef CONFIG_IWLWIFI_DEBUG
2229         struct iwl_rx_packet *pkt = rxb_addr(rxb);
2230         struct iwl_sleep_notification *sleep = &(pkt->u.sleep_notif);
2231         IWL_DEBUG_RX(priv, "sleep mode: %d, src: %d\n",
2232                      sleep->pm_sleep_mode, sleep->pm_wakeup_src);
2233 #endif
2234 }
2235 EXPORT_SYMBOL(iwl_rx_pm_sleep_notif);
2236
2237 void iwl_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
2238                                       struct iwl_rx_mem_buffer *rxb)
2239 {
2240         struct iwl_rx_packet *pkt = rxb_addr(rxb);
2241         u32 len = le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
2242         IWL_DEBUG_RADIO(priv, "Dumping %d bytes of unhandled "
2243                         "notification for %s:\n", len,
2244                         get_cmd_string(pkt->hdr.cmd));
2245         iwl_print_hex_dump(priv, IWL_DL_RADIO, pkt->u.raw, len);
2246 }
2247 EXPORT_SYMBOL(iwl_rx_pm_debug_statistics_notif);
2248
2249 void iwl_rx_reply_error(struct iwl_priv *priv,
2250                         struct iwl_rx_mem_buffer *rxb)
2251 {
2252         struct iwl_rx_packet *pkt = rxb_addr(rxb);
2253
2254         IWL_ERR(priv, "Error Reply type 0x%08X cmd %s (0x%02X) "
2255                 "seq 0x%04X ser 0x%08X\n",
2256                 le32_to_cpu(pkt->u.err_resp.error_type),
2257                 get_cmd_string(pkt->u.err_resp.cmd_id),
2258                 pkt->u.err_resp.cmd_id,
2259                 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
2260                 le32_to_cpu(pkt->u.err_resp.error_info));
2261 }
2262 EXPORT_SYMBOL(iwl_rx_reply_error);
2263
2264 void iwl_clear_isr_stats(struct iwl_priv *priv)
2265 {
2266         memset(&priv->isr_stats, 0, sizeof(priv->isr_stats));
2267 }
2268
2269 int iwl_mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
2270                            const struct ieee80211_tx_queue_params *params)
2271 {
2272         struct iwl_priv *priv = hw->priv;
2273         unsigned long flags;
2274         int q;
2275
2276         IWL_DEBUG_MAC80211(priv, "enter\n");
2277
2278         if (!iwl_is_ready_rf(priv)) {
2279                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
2280                 return -EIO;
2281         }
2282
2283         if (queue >= AC_NUM) {
2284                 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
2285                 return 0;
2286         }
2287
2288         q = AC_NUM - 1 - queue;
2289
2290         spin_lock_irqsave(&priv->lock, flags);
2291
2292         priv->qos_data.def_qos_parm.ac[q].cw_min = cpu_to_le16(params->cw_min);
2293         priv->qos_data.def_qos_parm.ac[q].cw_max = cpu_to_le16(params->cw_max);
2294         priv->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
2295         priv->qos_data.def_qos_parm.ac[q].edca_txop =
2296                         cpu_to_le16((params->txop * 32));
2297
2298         priv->qos_data.def_qos_parm.ac[q].reserved1 = 0;
2299         priv->qos_data.qos_active = 1;
2300
2301         if (priv->iw_mode == NL80211_IFTYPE_AP)
2302                 iwl_activate_qos(priv, 1);
2303         else if (priv->assoc_id && iwl_is_associated(priv))
2304                 iwl_activate_qos(priv, 0);
2305
2306         spin_unlock_irqrestore(&priv->lock, flags);
2307
2308         IWL_DEBUG_MAC80211(priv, "leave\n");
2309         return 0;
2310 }
2311 EXPORT_SYMBOL(iwl_mac_conf_tx);
2312
2313 static void iwl_ht_conf(struct iwl_priv *priv,
2314                         struct ieee80211_bss_conf *bss_conf)
2315 {
2316         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
2317         struct ieee80211_sta *sta;
2318
2319         IWL_DEBUG_MAC80211(priv, "enter: \n");
2320
2321         if (!ht_conf->is_ht)
2322                 return;
2323
2324         ht_conf->ht_protection =
2325                 bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_PROTECTION;
2326         ht_conf->non_GF_STA_present =
2327                 !!(bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
2328
2329         ht_conf->single_chain_sufficient = false;
2330
2331         switch (priv->iw_mode) {
2332         case NL80211_IFTYPE_STATION:
2333                 rcu_read_lock();
2334                 sta = ieee80211_find_sta(priv->hw, priv->bssid);
2335                 if (sta) {
2336                         struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
2337                         int maxstreams;
2338
2339                         maxstreams = (ht_cap->mcs.tx_params &
2340                                       IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK)
2341                                         >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
2342                         maxstreams += 1;
2343
2344                         if ((ht_cap->mcs.rx_mask[1] == 0) &&
2345                             (ht_cap->mcs.rx_mask[2] == 0))
2346                                 ht_conf->single_chain_sufficient = true;
2347                         if (maxstreams <= 1)
2348                                 ht_conf->single_chain_sufficient = true;
2349                 } else {
2350                         /*
2351                          * If at all, this can only happen through a race
2352                          * when the AP disconnects us while we're still
2353                          * setting up the connection, in that case mac80211
2354                          * will soon tell us about that.
2355                          */
2356                         ht_conf->single_chain_sufficient = true;
2357                 }
2358                 rcu_read_unlock();
2359                 break;
2360         case NL80211_IFTYPE_ADHOC:
2361                 ht_conf->single_chain_sufficient = true;
2362                 break;
2363         default:
2364                 break;
2365         }
2366
2367         IWL_DEBUG_MAC80211(priv, "leave\n");
2368 }
2369
2370 #define IWL_DELAY_NEXT_SCAN_AFTER_ASSOC (HZ*6)
2371 void iwl_bss_info_changed(struct ieee80211_hw *hw,
2372                           struct ieee80211_vif *vif,
2373                           struct ieee80211_bss_conf *bss_conf,
2374                           u32 changes)
2375 {
2376         struct iwl_priv *priv = hw->priv;
2377         int ret;
2378
2379         IWL_DEBUG_MAC80211(priv, "changes = 0x%X\n", changes);
2380
2381         if (!iwl_is_alive(priv))
2382                 return;
2383
2384         mutex_lock(&priv->mutex);
2385
2386         if (changes & BSS_CHANGED_BEACON &&
2387             priv->iw_mode == NL80211_IFTYPE_AP) {
2388                 dev_kfree_skb(priv->ibss_beacon);
2389                 priv->ibss_beacon = ieee80211_beacon_get(hw, vif);
2390         }
2391
2392         if (changes & BSS_CHANGED_BEACON_INT) {
2393                 priv->beacon_int = bss_conf->beacon_int;
2394                 /* TODO: in AP mode, do something to make this take effect */
2395         }
2396
2397         if (changes & BSS_CHANGED_BSSID) {
2398                 IWL_DEBUG_MAC80211(priv, "BSSID %pM\n", bss_conf->bssid);
2399
2400                 /*
2401                  * If there is currently a HW scan going on in the
2402                  * background then we need to cancel it else the RXON
2403                  * below/in post_associate will fail.
2404                  */
2405                 if (iwl_scan_cancel_timeout(priv, 100)) {
2406                         IWL_WARN(priv, "Aborted scan still in progress after 100ms\n");
2407                         IWL_DEBUG_MAC80211(priv, "leaving - scan abort failed.\n");
2408                         mutex_unlock(&priv->mutex);
2409                         return;
2410                 }
2411
2412                 /* mac80211 only sets assoc when in STATION mode */
2413                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC ||
2414                     bss_conf->assoc) {
2415                         memcpy(priv->staging_rxon.bssid_addr,
2416                                bss_conf->bssid, ETH_ALEN);
2417
2418                         /* currently needed in a few places */
2419                         memcpy(priv->bssid, bss_conf->bssid, ETH_ALEN);
2420                 } else {
2421                         priv->staging_rxon.filter_flags &=
2422                                 ~RXON_FILTER_ASSOC_MSK;
2423                 }
2424
2425         }
2426
2427         /*
2428          * This needs to be after setting the BSSID in case
2429          * mac80211 decides to do both changes at once because
2430          * it will invoke post_associate.
2431          */
2432         if (priv->iw_mode == NL80211_IFTYPE_ADHOC &&
2433             changes & BSS_CHANGED_BEACON) {
2434                 struct sk_buff *beacon = ieee80211_beacon_get(hw, vif);
2435
2436                 if (beacon)
2437                         iwl_mac_beacon_update(hw, beacon);
2438         }
2439
2440         if (changes & BSS_CHANGED_ERP_PREAMBLE) {
2441                 IWL_DEBUG_MAC80211(priv, "ERP_PREAMBLE %d\n",
2442                                    bss_conf->use_short_preamble);
2443                 if (bss_conf->use_short_preamble)
2444                         priv->staging_rxon.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
2445                 else
2446                         priv->staging_rxon.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
2447         }
2448
2449         if (changes & BSS_CHANGED_ERP_CTS_PROT) {
2450                 IWL_DEBUG_MAC80211(priv, "ERP_CTS %d\n", bss_conf->use_cts_prot);
2451                 if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ))
2452                         priv->staging_rxon.flags |= RXON_FLG_TGG_PROTECT_MSK;
2453                 else
2454                         priv->staging_rxon.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
2455         }
2456
2457         if (changes & BSS_CHANGED_BASIC_RATES) {
2458                 /* XXX use this information
2459                  *
2460                  * To do that, remove code from iwl_set_rate() and put something
2461                  * like this here:
2462                  *
2463                 if (A-band)
2464                         priv->staging_rxon.ofdm_basic_rates =
2465                                 bss_conf->basic_rates;
2466                 else
2467                         priv->staging_rxon.ofdm_basic_rates =
2468                                 bss_conf->basic_rates >> 4;
2469                         priv->staging_rxon.cck_basic_rates =
2470                                 bss_conf->basic_rates & 0xF;
2471                  */
2472         }
2473
2474         if (changes & BSS_CHANGED_HT) {
2475                 iwl_ht_conf(priv, bss_conf);
2476
2477                 if (priv->cfg->ops->hcmd->set_rxon_chain)
2478                         priv->cfg->ops->hcmd->set_rxon_chain(priv);
2479         }
2480
2481         if (changes & BSS_CHANGED_ASSOC) {
2482                 IWL_DEBUG_MAC80211(priv, "ASSOC %d\n", bss_conf->assoc);
2483                 if (bss_conf->assoc) {
2484                         priv->assoc_id = bss_conf->aid;
2485                         priv->beacon_int = bss_conf->beacon_int;
2486                         priv->timestamp = bss_conf->timestamp;
2487                         priv->assoc_capability = bss_conf->assoc_capability;
2488
2489                         iwl_led_associate(priv);
2490
2491                         /*
2492                          * We have just associated, don't start scan too early
2493                          * leave time for EAPOL exchange to complete.
2494                          *
2495                          * XXX: do this in mac80211
2496                          */
2497                         priv->next_scan_jiffies = jiffies +
2498                                         IWL_DELAY_NEXT_SCAN_AFTER_ASSOC;
2499                         if (!iwl_is_rfkill(priv))
2500                                 priv->cfg->ops->lib->post_associate(priv);
2501                 } else {
2502                         priv->assoc_id = 0;
2503                         iwl_led_disassociate(priv);
2504                 }
2505         }
2506
2507         if (changes && iwl_is_associated(priv) && priv->assoc_id) {
2508                 IWL_DEBUG_MAC80211(priv, "Changes (%#x) while associated\n",
2509                                    changes);
2510                 ret = iwl_send_rxon_assoc(priv);
2511                 if (!ret) {
2512                         /* Sync active_rxon with latest change. */
2513                         memcpy((void *)&priv->active_rxon,
2514                                 &priv->staging_rxon,
2515                                 sizeof(struct iwl_rxon_cmd));
2516                 }
2517         }
2518
2519         mutex_unlock(&priv->mutex);
2520
2521         IWL_DEBUG_MAC80211(priv, "leave\n");
2522 }
2523 EXPORT_SYMBOL(iwl_bss_info_changed);
2524
2525 int iwl_mac_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb)
2526 {
2527         struct iwl_priv *priv = hw->priv;
2528         unsigned long flags;
2529         __le64 timestamp;
2530
2531         IWL_DEBUG_MAC80211(priv, "enter\n");
2532
2533         if (!iwl_is_ready_rf(priv)) {
2534                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
2535                 return -EIO;
2536         }
2537
2538         if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
2539                 IWL_DEBUG_MAC80211(priv, "leave - not IBSS\n");
2540                 return -EIO;
2541         }
2542
2543         spin_lock_irqsave(&priv->lock, flags);
2544
2545         if (priv->ibss_beacon)
2546                 dev_kfree_skb(priv->ibss_beacon);
2547
2548         priv->ibss_beacon = skb;
2549
2550         priv->assoc_id = 0;
2551         timestamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
2552         priv->timestamp = le64_to_cpu(timestamp);
2553
2554         IWL_DEBUG_MAC80211(priv, "leave\n");
2555         spin_unlock_irqrestore(&priv->lock, flags);
2556
2557         iwl_reset_qos(priv);
2558
2559         priv->cfg->ops->lib->post_associate(priv);
2560
2561
2562         return 0;
2563 }
2564 EXPORT_SYMBOL(iwl_mac_beacon_update);
2565
2566 int iwl_set_mode(struct iwl_priv *priv, int mode)
2567 {
2568         if (mode == NL80211_IFTYPE_ADHOC) {
2569                 const struct iwl_channel_info *ch_info;
2570
2571                 ch_info = iwl_get_channel_info(priv,
2572                         priv->band,
2573                         le16_to_cpu(priv->staging_rxon.channel));
2574
2575                 if (!ch_info || !is_channel_ibss(ch_info)) {
2576                         IWL_ERR(priv, "channel %d not IBSS channel\n",
2577                                   le16_to_cpu(priv->staging_rxon.channel));
2578                         return -EINVAL;
2579                 }
2580         }
2581
2582         iwl_connection_init_rx_config(priv, mode);
2583
2584         if (priv->cfg->ops->hcmd->set_rxon_chain)
2585                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
2586
2587         memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
2588
2589         iwl_clear_stations_table(priv);
2590
2591         /* dont commit rxon if rf-kill is on*/
2592         if (!iwl_is_ready_rf(priv))
2593                 return -EAGAIN;
2594
2595         iwlcore_commit_rxon(priv);
2596
2597         return 0;
2598 }
2599 EXPORT_SYMBOL(iwl_set_mode);
2600
2601 int iwl_mac_add_interface(struct ieee80211_hw *hw,
2602                                  struct ieee80211_if_init_conf *conf)
2603 {
2604         struct iwl_priv *priv = hw->priv;
2605         unsigned long flags;
2606
2607         IWL_DEBUG_MAC80211(priv, "enter: type %d\n", conf->type);
2608
2609         if (priv->vif) {
2610                 IWL_DEBUG_MAC80211(priv, "leave - vif != NULL\n");
2611                 return -EOPNOTSUPP;
2612         }
2613
2614         spin_lock_irqsave(&priv->lock, flags);
2615         priv->vif = conf->vif;
2616         priv->iw_mode = conf->type;
2617
2618         spin_unlock_irqrestore(&priv->lock, flags);
2619
2620         mutex_lock(&priv->mutex);
2621
2622         if (conf->mac_addr) {
2623                 IWL_DEBUG_MAC80211(priv, "Set %pM\n", conf->mac_addr);
2624                 memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
2625         }
2626
2627         if (iwl_set_mode(priv, conf->type) == -EAGAIN)
2628                 /* we are not ready, will run again when ready */
2629                 set_bit(STATUS_MODE_PENDING, &priv->status);
2630
2631         mutex_unlock(&priv->mutex);
2632
2633         IWL_DEBUG_MAC80211(priv, "leave\n");
2634         return 0;
2635 }
2636 EXPORT_SYMBOL(iwl_mac_add_interface);
2637
2638 void iwl_mac_remove_interface(struct ieee80211_hw *hw,
2639                                      struct ieee80211_if_init_conf *conf)
2640 {
2641         struct iwl_priv *priv = hw->priv;
2642
2643         IWL_DEBUG_MAC80211(priv, "enter\n");
2644
2645         mutex_lock(&priv->mutex);
2646
2647         if (iwl_is_ready_rf(priv)) {
2648                 iwl_scan_cancel_timeout(priv, 100);
2649                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2650                 iwlcore_commit_rxon(priv);
2651         }
2652         if (priv->vif == conf->vif) {
2653                 priv->vif = NULL;
2654                 memset(priv->bssid, 0, ETH_ALEN);
2655         }
2656         mutex_unlock(&priv->mutex);
2657
2658         IWL_DEBUG_MAC80211(priv, "leave\n");
2659
2660 }
2661 EXPORT_SYMBOL(iwl_mac_remove_interface);
2662
2663 /**
2664  * iwl_mac_config - mac80211 config callback
2665  *
2666  * We ignore conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME since it seems to
2667  * be set inappropriately and the driver currently sets the hardware up to
2668  * use it whenever needed.
2669  */
2670 int iwl_mac_config(struct ieee80211_hw *hw, u32 changed)
2671 {
2672         struct iwl_priv *priv = hw->priv;
2673         const struct iwl_channel_info *ch_info;
2674         struct ieee80211_conf *conf = &hw->conf;
2675         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
2676         unsigned long flags = 0;
2677         int ret = 0;
2678         u16 ch;
2679         int scan_active = 0;
2680
2681         mutex_lock(&priv->mutex);
2682
2683         IWL_DEBUG_MAC80211(priv, "enter to channel %d changed 0x%X\n",
2684                                         conf->channel->hw_value, changed);
2685
2686         if (unlikely(!priv->cfg->mod_params->disable_hw_scan &&
2687                         test_bit(STATUS_SCANNING, &priv->status))) {
2688                 scan_active = 1;
2689                 IWL_DEBUG_MAC80211(priv, "leave - scanning\n");
2690         }
2691
2692
2693         /* during scanning mac80211 will delay channel setting until
2694          * scan finish with changed = 0
2695          */
2696         if (!changed || (changed & IEEE80211_CONF_CHANGE_CHANNEL)) {
2697                 if (scan_active)
2698                         goto set_ch_out;
2699
2700                 ch = ieee80211_frequency_to_channel(conf->channel->center_freq);
2701                 ch_info = iwl_get_channel_info(priv, conf->channel->band, ch);
2702                 if (!is_channel_valid(ch_info)) {
2703                         IWL_DEBUG_MAC80211(priv, "leave - invalid channel\n");
2704                         ret = -EINVAL;
2705                         goto set_ch_out;
2706                 }
2707
2708                 if (priv->iw_mode == NL80211_IFTYPE_ADHOC &&
2709                         !is_channel_ibss(ch_info)) {
2710                         IWL_ERR(priv, "channel %d in band %d not "
2711                                 "IBSS channel\n",
2712                                 conf->channel->hw_value, conf->channel->band);
2713                         ret = -EINVAL;
2714                         goto set_ch_out;
2715                 }
2716
2717                 spin_lock_irqsave(&priv->lock, flags);
2718
2719                 /* Configure HT40 channels */
2720                 ht_conf->is_ht = conf_is_ht(conf);
2721                 if (ht_conf->is_ht) {
2722                         if (conf_is_ht40_minus(conf)) {
2723                                 ht_conf->extension_chan_offset =
2724                                         IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2725                                 ht_conf->is_40mhz = true;
2726                         } else if (conf_is_ht40_plus(conf)) {
2727                                 ht_conf->extension_chan_offset =
2728                                         IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2729                                 ht_conf->is_40mhz = true;
2730                         } else {
2731                                 ht_conf->extension_chan_offset =
2732                                         IEEE80211_HT_PARAM_CHA_SEC_NONE;
2733                                 ht_conf->is_40mhz = false;
2734                         }
2735                 } else
2736                         ht_conf->is_40mhz = false;
2737                 /* Default to no protection. Protection mode will later be set
2738                  * from BSS config in iwl_ht_conf */
2739                 ht_conf->ht_protection = IEEE80211_HT_OP_MODE_PROTECTION_NONE;
2740
2741                 /* if we are switching from ht to 2.4 clear flags
2742                  * from any ht related info since 2.4 does not
2743                  * support ht */
2744                 if ((le16_to_cpu(priv->staging_rxon.channel) != ch))
2745                         priv->staging_rxon.flags = 0;
2746
2747                 iwl_set_rxon_channel(priv, conf->channel);
2748
2749                 iwl_set_flags_for_band(priv, conf->channel->band);
2750                 spin_unlock_irqrestore(&priv->lock, flags);
2751  set_ch_out:
2752                 /* The list of supported rates and rate mask can be different
2753                  * for each band; since the band may have changed, reset
2754                  * the rate mask to what mac80211 lists */
2755                 iwl_set_rate(priv);
2756         }
2757
2758         if (changed & (IEEE80211_CONF_CHANGE_PS |
2759                         IEEE80211_CONF_CHANGE_IDLE)) {
2760                 ret = iwl_power_update_mode(priv, false);
2761                 if (ret)
2762                         IWL_DEBUG_MAC80211(priv, "Error setting sleep level\n");
2763         }
2764
2765         if (changed & IEEE80211_CONF_CHANGE_POWER) {
2766                 IWL_DEBUG_MAC80211(priv, "TX Power old=%d new=%d\n",
2767                         priv->tx_power_user_lmt, conf->power_level);
2768
2769                 iwl_set_tx_power(priv, conf->power_level, false);
2770         }
2771
2772         /* call to ensure that 4965 rx_chain is set properly in monitor mode */
2773         if (priv->cfg->ops->hcmd->set_rxon_chain)
2774                 priv->cfg->ops->hcmd->set_rxon_chain(priv);
2775
2776         if (!iwl_is_ready(priv)) {
2777                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2778                 goto out;
2779         }
2780
2781         if (scan_active)
2782                 goto out;
2783
2784         if (memcmp(&priv->active_rxon,
2785                    &priv->staging_rxon, sizeof(priv->staging_rxon)))
2786                 iwlcore_commit_rxon(priv);
2787         else
2788                 IWL_DEBUG_INFO(priv, "Not re-sending same RXON configuration.\n");
2789
2790
2791 out:
2792         IWL_DEBUG_MAC80211(priv, "leave\n");
2793         mutex_unlock(&priv->mutex);
2794         return ret;
2795 }
2796 EXPORT_SYMBOL(iwl_mac_config);
2797
2798 int iwl_mac_get_tx_stats(struct ieee80211_hw *hw,
2799                          struct ieee80211_tx_queue_stats *stats)
2800 {
2801         struct iwl_priv *priv = hw->priv;
2802         int i, avail;
2803         struct iwl_tx_queue *txq;
2804         struct iwl_queue *q;
2805         unsigned long flags;
2806
2807         IWL_DEBUG_MAC80211(priv, "enter\n");
2808
2809         if (!iwl_is_ready_rf(priv)) {
2810                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
2811                 return -EIO;
2812         }
2813
2814         spin_lock_irqsave(&priv->lock, flags);
2815
2816         for (i = 0; i < AC_NUM; i++) {
2817                 txq = &priv->txq[i];
2818                 q = &txq->q;
2819                 avail = iwl_queue_space(q);
2820
2821                 stats[i].len = q->n_window - avail;
2822                 stats[i].limit = q->n_window - q->high_mark;
2823                 stats[i].count = q->n_window;
2824
2825         }
2826         spin_unlock_irqrestore(&priv->lock, flags);
2827
2828         IWL_DEBUG_MAC80211(priv, "leave\n");
2829
2830         return 0;
2831 }
2832 EXPORT_SYMBOL(iwl_mac_get_tx_stats);
2833
2834 void iwl_mac_reset_tsf(struct ieee80211_hw *hw)
2835 {
2836         struct iwl_priv *priv = hw->priv;
2837         unsigned long flags;
2838
2839         mutex_lock(&priv->mutex);
2840         IWL_DEBUG_MAC80211(priv, "enter\n");
2841
2842         spin_lock_irqsave(&priv->lock, flags);
2843         memset(&priv->current_ht_config, 0, sizeof(struct iwl_ht_config));
2844         spin_unlock_irqrestore(&priv->lock, flags);
2845
2846         iwl_reset_qos(priv);
2847
2848         spin_lock_irqsave(&priv->lock, flags);
2849         priv->assoc_id = 0;
2850         priv->assoc_capability = 0;
2851         priv->assoc_station_added = 0;
2852
2853         /* new association get rid of ibss beacon skb */
2854         if (priv->ibss_beacon)
2855                 dev_kfree_skb(priv->ibss_beacon);
2856
2857         priv->ibss_beacon = NULL;
2858
2859         priv->beacon_int = priv->vif->bss_conf.beacon_int;
2860         priv->timestamp = 0;
2861         if ((priv->iw_mode == NL80211_IFTYPE_STATION))
2862                 priv->beacon_int = 0;
2863
2864         spin_unlock_irqrestore(&priv->lock, flags);
2865
2866         if (!iwl_is_ready_rf(priv)) {
2867                 IWL_DEBUG_MAC80211(priv, "leave - not ready\n");
2868                 mutex_unlock(&priv->mutex);
2869                 return;
2870         }
2871
2872         /* we are restarting association process
2873          * clear RXON_FILTER_ASSOC_MSK bit
2874          */
2875         if (priv->iw_mode != NL80211_IFTYPE_AP) {
2876                 iwl_scan_cancel_timeout(priv, 100);
2877                 priv->staging_rxon.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2878                 iwlcore_commit_rxon(priv);
2879         }
2880
2881         if (priv->iw_mode != NL80211_IFTYPE_ADHOC) {
2882                 IWL_DEBUG_MAC80211(priv, "leave - not in IBSS\n");
2883                 mutex_unlock(&priv->mutex);
2884                 return;
2885         }
2886
2887         iwl_set_rate(priv);
2888
2889         mutex_unlock(&priv->mutex);
2890
2891         IWL_DEBUG_MAC80211(priv, "leave\n");
2892 }
2893 EXPORT_SYMBOL(iwl_mac_reset_tsf);
2894
2895 int iwl_alloc_txq_mem(struct iwl_priv *priv)
2896 {
2897         if (!priv->txq)
2898                 priv->txq = kzalloc(
2899                         sizeof(struct iwl_tx_queue) * priv->cfg->num_of_queues,
2900                         GFP_KERNEL);
2901         if (!priv->txq) {
2902                 IWL_ERR(priv, "Not enough memory for txq \n");
2903                 return -ENOMEM;
2904         }
2905         return 0;
2906 }
2907 EXPORT_SYMBOL(iwl_alloc_txq_mem);
2908
2909 void iwl_free_txq_mem(struct iwl_priv *priv)
2910 {
2911         kfree(priv->txq);
2912         priv->txq = NULL;
2913 }
2914 EXPORT_SYMBOL(iwl_free_txq_mem);
2915
2916 #ifdef CONFIG_IWLWIFI_DEBUGFS
2917
2918 #define IWL_TRAFFIC_DUMP_SIZE   (IWL_TRAFFIC_ENTRY_SIZE * IWL_TRAFFIC_ENTRIES)
2919
2920 void iwl_reset_traffic_log(struct iwl_priv *priv)
2921 {
2922         priv->tx_traffic_idx = 0;
2923         priv->rx_traffic_idx = 0;
2924         if (priv->tx_traffic)
2925                 memset(priv->tx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
2926         if (priv->rx_traffic)
2927                 memset(priv->rx_traffic, 0, IWL_TRAFFIC_DUMP_SIZE);
2928 }
2929
2930 int iwl_alloc_traffic_mem(struct iwl_priv *priv)
2931 {
2932         u32 traffic_size = IWL_TRAFFIC_DUMP_SIZE;
2933
2934         if (iwl_debug_level & IWL_DL_TX) {
2935                 if (!priv->tx_traffic) {
2936                         priv->tx_traffic =
2937                                 kzalloc(traffic_size, GFP_KERNEL);
2938                         if (!priv->tx_traffic)
2939                                 return -ENOMEM;
2940                 }
2941         }
2942         if (iwl_debug_level & IWL_DL_RX) {
2943                 if (!priv->rx_traffic) {
2944                         priv->rx_traffic =
2945                                 kzalloc(traffic_size, GFP_KERNEL);
2946                         if (!priv->rx_traffic)
2947                                 return -ENOMEM;
2948                 }
2949         }
2950         iwl_reset_traffic_log(priv);
2951         return 0;
2952 }
2953 EXPORT_SYMBOL(iwl_alloc_traffic_mem);
2954
2955 void iwl_free_traffic_mem(struct iwl_priv *priv)
2956 {
2957         kfree(priv->tx_traffic);
2958         priv->tx_traffic = NULL;
2959
2960         kfree(priv->rx_traffic);
2961         priv->rx_traffic = NULL;
2962 }
2963 EXPORT_SYMBOL(iwl_free_traffic_mem);
2964
2965 void iwl_dbg_log_tx_data_frame(struct iwl_priv *priv,
2966                       u16 length, struct ieee80211_hdr *header)
2967 {
2968         __le16 fc;
2969         u16 len;
2970
2971         if (likely(!(iwl_debug_level & IWL_DL_TX)))
2972                 return;
2973
2974         if (!priv->tx_traffic)
2975                 return;
2976
2977         fc = header->frame_control;
2978         if (ieee80211_is_data(fc)) {
2979                 len = (length > IWL_TRAFFIC_ENTRY_SIZE)
2980                        ? IWL_TRAFFIC_ENTRY_SIZE : length;
2981                 memcpy((priv->tx_traffic +
2982                        (priv->tx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
2983                        header, len);
2984                 priv->tx_traffic_idx =
2985                         (priv->tx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
2986         }
2987 }
2988 EXPORT_SYMBOL(iwl_dbg_log_tx_data_frame);
2989
2990 void iwl_dbg_log_rx_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_RX)))
2997                 return;
2998
2999         if (!priv->rx_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->rx_traffic +
3007                        (priv->rx_traffic_idx * IWL_TRAFFIC_ENTRY_SIZE)),
3008                        header, len);
3009                 priv->rx_traffic_idx =
3010                         (priv->rx_traffic_idx + 1) % IWL_TRAFFIC_ENTRIES;
3011         }
3012 }
3013 EXPORT_SYMBOL(iwl_dbg_log_rx_data_frame);
3014
3015 const char *get_mgmt_string(int cmd)
3016 {
3017         switch (cmd) {
3018                 IWL_CMD(MANAGEMENT_ASSOC_REQ);
3019                 IWL_CMD(MANAGEMENT_ASSOC_RESP);
3020                 IWL_CMD(MANAGEMENT_REASSOC_REQ);
3021                 IWL_CMD(MANAGEMENT_REASSOC_RESP);
3022                 IWL_CMD(MANAGEMENT_PROBE_REQ);
3023                 IWL_CMD(MANAGEMENT_PROBE_RESP);
3024                 IWL_CMD(MANAGEMENT_BEACON);
3025                 IWL_CMD(MANAGEMENT_ATIM);
3026                 IWL_CMD(MANAGEMENT_DISASSOC);
3027                 IWL_CMD(MANAGEMENT_AUTH);
3028                 IWL_CMD(MANAGEMENT_DEAUTH);
3029                 IWL_CMD(MANAGEMENT_ACTION);
3030         default:
3031                 return "UNKNOWN";
3032
3033         }
3034 }
3035
3036 const char *get_ctrl_string(int cmd)
3037 {
3038         switch (cmd) {
3039                 IWL_CMD(CONTROL_BACK_REQ);
3040                 IWL_CMD(CONTROL_BACK);
3041                 IWL_CMD(CONTROL_PSPOLL);
3042                 IWL_CMD(CONTROL_RTS);
3043                 IWL_CMD(CONTROL_CTS);
3044                 IWL_CMD(CONTROL_ACK);
3045                 IWL_CMD(CONTROL_CFEND);
3046                 IWL_CMD(CONTROL_CFENDACK);
3047         default:
3048                 return "UNKNOWN";
3049
3050         }
3051 }
3052
3053 void iwl_clear_tx_stats(struct iwl_priv *priv)
3054 {
3055         memset(&priv->tx_stats, 0, sizeof(struct traffic_stats));
3056
3057 }
3058
3059 void iwl_clear_rx_stats(struct iwl_priv *priv)
3060 {
3061         memset(&priv->rx_stats, 0, sizeof(struct traffic_stats));
3062 }
3063
3064 /*
3065  * if CONFIG_IWLWIFI_DEBUGFS defined, iwl_update_stats function will
3066  * record all the MGMT, CTRL and DATA pkt for both TX and Rx pass.
3067  * Use debugFs to display the rx/rx_statistics
3068  * if CONFIG_IWLWIFI_DEBUGFS not being defined, then no MGMT and CTRL
3069  * information will be recorded, but DATA pkt still will be recorded
3070  * for the reason of iwl_led.c need to control the led blinking based on
3071  * number of tx and rx data.
3072  *
3073  */
3074 void iwl_update_stats(struct iwl_priv *priv, bool is_tx, __le16 fc, u16 len)
3075 {
3076         struct traffic_stats    *stats;
3077
3078         if (is_tx)
3079                 stats = &priv->tx_stats;
3080         else
3081                 stats = &priv->rx_stats;
3082
3083         if (ieee80211_is_mgmt(fc)) {
3084                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
3085                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
3086                         stats->mgmt[MANAGEMENT_ASSOC_REQ]++;
3087                         break;
3088                 case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP):
3089                         stats->mgmt[MANAGEMENT_ASSOC_RESP]++;
3090                         break;
3091                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
3092                         stats->mgmt[MANAGEMENT_REASSOC_REQ]++;
3093                         break;
3094                 case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP):
3095                         stats->mgmt[MANAGEMENT_REASSOC_RESP]++;
3096                         break;
3097                 case cpu_to_le16(IEEE80211_STYPE_PROBE_REQ):
3098                         stats->mgmt[MANAGEMENT_PROBE_REQ]++;
3099                         break;
3100                 case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP):
3101                         stats->mgmt[MANAGEMENT_PROBE_RESP]++;
3102                         break;
3103                 case cpu_to_le16(IEEE80211_STYPE_BEACON):
3104                         stats->mgmt[MANAGEMENT_BEACON]++;
3105                         break;
3106                 case cpu_to_le16(IEEE80211_STYPE_ATIM):
3107                         stats->mgmt[MANAGEMENT_ATIM]++;
3108                         break;
3109                 case cpu_to_le16(IEEE80211_STYPE_DISASSOC):
3110                         stats->mgmt[MANAGEMENT_DISASSOC]++;
3111                         break;
3112                 case cpu_to_le16(IEEE80211_STYPE_AUTH):
3113                         stats->mgmt[MANAGEMENT_AUTH]++;
3114                         break;
3115                 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
3116                         stats->mgmt[MANAGEMENT_DEAUTH]++;
3117                         break;
3118                 case cpu_to_le16(IEEE80211_STYPE_ACTION):
3119                         stats->mgmt[MANAGEMENT_ACTION]++;
3120                         break;
3121                 }
3122         } else if (ieee80211_is_ctl(fc)) {
3123                 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
3124                 case cpu_to_le16(IEEE80211_STYPE_BACK_REQ):
3125                         stats->ctrl[CONTROL_BACK_REQ]++;
3126                         break;
3127                 case cpu_to_le16(IEEE80211_STYPE_BACK):
3128                         stats->ctrl[CONTROL_BACK]++;
3129                         break;
3130                 case cpu_to_le16(IEEE80211_STYPE_PSPOLL):
3131                         stats->ctrl[CONTROL_PSPOLL]++;
3132                         break;
3133                 case cpu_to_le16(IEEE80211_STYPE_RTS):
3134                         stats->ctrl[CONTROL_RTS]++;
3135                         break;
3136                 case cpu_to_le16(IEEE80211_STYPE_CTS):
3137                         stats->ctrl[CONTROL_CTS]++;
3138                         break;
3139                 case cpu_to_le16(IEEE80211_STYPE_ACK):
3140                         stats->ctrl[CONTROL_ACK]++;
3141                         break;
3142                 case cpu_to_le16(IEEE80211_STYPE_CFEND):
3143                         stats->ctrl[CONTROL_CFEND]++;
3144                         break;
3145                 case cpu_to_le16(IEEE80211_STYPE_CFENDACK):
3146                         stats->ctrl[CONTROL_CFENDACK]++;
3147                         break;
3148                 }
3149         } else {
3150                 /* data */
3151                 stats->data_cnt++;
3152                 stats->data_bytes += len;
3153         }
3154 }
3155 EXPORT_SYMBOL(iwl_update_stats);
3156 #endif
3157
3158 #ifdef CONFIG_PM
3159
3160 int iwl_pci_suspend(struct pci_dev *pdev, pm_message_t state)
3161 {
3162         struct iwl_priv *priv = pci_get_drvdata(pdev);
3163
3164         /*
3165          * This function is called when system goes into suspend state
3166          * mac80211 will call iwl_mac_stop() from the mac80211 suspend function
3167          * first but since iwl_mac_stop() has no knowledge of who the caller is,
3168          * it will not call apm_ops.stop() to stop the DMA operation.
3169          * Calling apm_ops.stop here to make sure we stop the DMA.
3170          */
3171         priv->cfg->ops->lib->apm_ops.stop(priv);
3172
3173         pci_save_state(pdev);
3174         pci_disable_device(pdev);
3175         pci_set_power_state(pdev, PCI_D3hot);
3176
3177         return 0;
3178 }
3179 EXPORT_SYMBOL(iwl_pci_suspend);
3180
3181 int iwl_pci_resume(struct pci_dev *pdev)
3182 {
3183         struct iwl_priv *priv = pci_get_drvdata(pdev);
3184         int ret;
3185
3186         pci_set_power_state(pdev, PCI_D0);
3187         ret = pci_enable_device(pdev);
3188         if (ret)
3189                 return ret;
3190         pci_restore_state(pdev);
3191         iwl_enable_interrupts(priv);
3192
3193         return 0;
3194 }
3195 EXPORT_SYMBOL(iwl_pci_resume);
3196
3197 #endif /* CONFIG_PM */