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

   1 /******************************************************************************
   2  *
   3  * GPL LICENSE SUMMARY
   4  *
   5  * Copyright(c) 2008 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  * Tomas Winkler <tomas.winkler@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 <net/mac80211.h>
  32
  33 struct iwl_priv; /* FIXME: remove */
  34 #include "iwl-debug.h"
  35 #include "iwl-eeprom.h"
  36 #include "iwl-dev.h" /* FIXME: remove */
  37 #include "iwl-core.h"
  38 #include "iwl-io.h"
  39 #include "iwl-rfkill.h"
  40 #include "iwl-power.h"
  41
  42
  43 MODULE_DESCRIPTION("iwl core");
  44 MODULE_VERSION(IWLWIFI_VERSION);
  45 MODULE_AUTHOR(DRV_COPYRIGHT);
  46 MODULE_LICENSE("GPL");
  47
  48 #define IWL_DECLARE_RATE_INFO(r, s, ip, in, rp, rn, pp, np)    \
  49         [IWL_RATE_##r##M_INDEX] = { IWL_RATE_##r##M_PLCP,      \
  50                                     IWL_RATE_SISO_##s##M_PLCP, \
  51                                     IWL_RATE_MIMO2_##s##M_PLCP,\
  52                                     IWL_RATE_MIMO3_##s##M_PLCP,\
  53                                     IWL_RATE_##r##M_IEEE,      \
  54                                     IWL_RATE_##ip##M_INDEX,    \
  55                                     IWL_RATE_##in##M_INDEX,    \
  56                                     IWL_RATE_##rp##M_INDEX,    \
  57                                     IWL_RATE_##rn##M_INDEX,    \
  58                                     IWL_RATE_##pp##M_INDEX,    \
  59                                     IWL_RATE_##np##M_INDEX }
  60
  61 /*
  62  * Parameter order:
  63  *   rate, ht rate, prev rate, next rate, prev tgg rate, next tgg rate
  64  *
  65  * If there isn't a valid next or previous rate then INV is used which
  66  * maps to IWL_RATE_INVALID
  67  *
  68  */
  69 const struct iwl_rate_info iwl_rates[IWL_RATE_COUNT] = {
  70         IWL_DECLARE_RATE_INFO(1, INV, INV, 2, INV, 2, INV, 2),    /*  1mbps */
  71         IWL_DECLARE_RATE_INFO(2, INV, 1, 5, 1, 5, 1, 5),          /*  2mbps */
  72         IWL_DECLARE_RATE_INFO(5, INV, 2, 6, 2, 11, 2, 11),        /*5.5mbps */
  73         IWL_DECLARE_RATE_INFO(11, INV, 9, 12, 9, 12, 5, 18),      /* 11mbps */
  74         IWL_DECLARE_RATE_INFO(6, 6, 5, 9, 5, 11, 5, 11),        /*  6mbps */
  75         IWL_DECLARE_RATE_INFO(9, 6, 6, 11, 6, 11, 5, 11),       /*  9mbps */
  76         IWL_DECLARE_RATE_INFO(12, 12, 11, 18, 11, 18, 11, 18),   /* 12mbps */
  77         IWL_DECLARE_RATE_INFO(18, 18, 12, 24, 12, 24, 11, 24),   /* 18mbps */
  78         IWL_DECLARE_RATE_INFO(24, 24, 18, 36, 18, 36, 18, 36),   /* 24mbps */
  79         IWL_DECLARE_RATE_INFO(36, 36, 24, 48, 24, 48, 24, 48),   /* 36mbps */
  80         IWL_DECLARE_RATE_INFO(48, 48, 36, 54, 36, 54, 36, 54),   /* 48mbps */
  81         IWL_DECLARE_RATE_INFO(54, 54, 48, INV, 48, INV, 48, INV),/* 54mbps */
  82         IWL_DECLARE_RATE_INFO(60, 60, 48, INV, 48, INV, 48, INV),/* 60mbps */
  83         /* FIXME:RS:          ^^    should be INV (legacy) */
  84 };
  85 EXPORT_SYMBOL(iwl_rates);
  86
  87 /**
  88  * translate ucode response to mac80211 tx status control values
  89  */
  90 void iwl_hwrate_to_tx_control(struct iwl_priv *priv, u32 rate_n_flags,
  91                                   struct ieee80211_tx_info *control)
  92 {
  93         int rate_index;
  94
  95         control->antenna_sel_tx =
  96                 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
  97         if (rate_n_flags & RATE_MCS_HT_MSK)
  98                 control->flags |= IEEE80211_TX_CTL_OFDM_HT;
  99         if (rate_n_flags & RATE_MCS_GF_MSK)
 100                 control->flags |= IEEE80211_TX_CTL_GREEN_FIELD;
 101         if (rate_n_flags & RATE_MCS_FAT_MSK)
 102                 control->flags |= IEEE80211_TX_CTL_40_MHZ_WIDTH;
 103         if (rate_n_flags & RATE_MCS_DUP_MSK)
 104                 control->flags |= IEEE80211_TX_CTL_DUP_DATA;
 105         if (rate_n_flags & RATE_MCS_SGI_MSK)
 106                 control->flags |= IEEE80211_TX_CTL_SHORT_GI;
 107         rate_index = iwl_hwrate_to_plcp_idx(rate_n_flags);
 108         if (control->band == IEEE80211_BAND_5GHZ)
 109                 rate_index -= IWL_FIRST_OFDM_RATE;
 110         control->tx_rate_idx = rate_index;
 111 }
 112 EXPORT_SYMBOL(iwl_hwrate_to_tx_control);
 113
 114 int iwl_hwrate_to_plcp_idx(u32 rate_n_flags)
 115 {
 116         int idx = 0;
 117
 118         /* HT rate format */
 119         if (rate_n_flags & RATE_MCS_HT_MSK) {
 120                 idx = (rate_n_flags & 0xff);
 121
 122                 if (idx >= IWL_RATE_MIMO2_6M_PLCP)
 123                         idx = idx - IWL_RATE_MIMO2_6M_PLCP;
 124
 125                 idx += IWL_FIRST_OFDM_RATE;
 126                 /* skip 9M not supported in ht*/
 127                 if (idx >= IWL_RATE_9M_INDEX)
 128                         idx += 1;
 129                 if ((idx >= IWL_FIRST_OFDM_RATE) && (idx <= IWL_LAST_OFDM_RATE))
 130                         return idx;
 131
 132         /* legacy rate format, search for match in table */
 133         } else {
 134                 for (idx = 0; idx < ARRAY_SIZE(iwl_rates); idx++)
 135                         if (iwl_rates[idx].plcp == (rate_n_flags & 0xFF))
 136                                 return idx;
 137         }
 138
 139         return -1;
 140 }
 141 EXPORT_SYMBOL(iwl_hwrate_to_plcp_idx);
 142
 143
 144
 145 const u8 iwl_bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
 146 EXPORT_SYMBOL(iwl_bcast_addr);
 147
 148
 149 /* This function both allocates and initializes hw and priv. */
 150 struct ieee80211_hw *iwl_alloc_all(struct iwl_cfg *cfg,
 151                 struct ieee80211_ops *hw_ops)
 152 {
 153         struct iwl_priv *priv;
 154
 155         /* mac80211 allocates memory for this device instance, including
 156          *   space for this driver's private structure */
 157         struct ieee80211_hw *hw =
 158                 ieee80211_alloc_hw(sizeof(struct iwl_priv), hw_ops);
 159         if (hw == NULL) {
 160                 IWL_ERROR("Can not allocate network device\n");
 161                 goto out;
 162         }
 163
 164         priv = hw->priv;
 165         priv->hw = hw;
 166
 167 out:
 168         return hw;
 169 }
 170 EXPORT_SYMBOL(iwl_alloc_all);
 171
 172 void iwl_hw_detect(struct iwl_priv *priv)
 173 {
 174         priv->hw_rev = _iwl_read32(priv, CSR_HW_REV);
 175         priv->hw_wa_rev = _iwl_read32(priv, CSR_HW_REV_WA_REG);
 176         pci_read_config_byte(priv->pci_dev, PCI_REVISION_ID, &priv->rev_id);
 177 }
 178 EXPORT_SYMBOL(iwl_hw_detect);
 179
 180 /* Tell nic where to find the "keep warm" buffer */
 181 int iwl_kw_init(struct iwl_priv *priv)
 182 {
 183         unsigned long flags;
 184         int ret;
 185
 186         spin_lock_irqsave(&priv->lock, flags);
 187         ret = iwl_grab_nic_access(priv);
 188         if (ret)
 189                 goto out;
 190
 191         iwl_write_direct32(priv, FH_KW_MEM_ADDR_REG,
 192                              priv->kw.dma_addr >> 4);
 193         iwl_release_nic_access(priv);
 194 out:
 195         spin_unlock_irqrestore(&priv->lock, flags);
 196         return ret;
 197 }
 198
 199 int iwl_kw_alloc(struct iwl_priv *priv)
 200 {
 201         struct pci_dev *dev = priv->pci_dev;
 202         struct iwl_kw *kw = &priv->kw;
 203
 204         kw->size = IWL_KW_SIZE;
 205         kw->v_addr = pci_alloc_consistent(dev, kw->size, &kw->dma_addr);
 206         if (!kw->v_addr)
 207                 return -ENOMEM;
 208
 209         return 0;
 210 }
 211
 212 /**
 213  * iwl_kw_free - Free the "keep warm" buffer
 214  */
 215 void iwl_kw_free(struct iwl_priv *priv)
 216 {
 217         struct pci_dev *dev = priv->pci_dev;
 218         struct iwl_kw *kw = &priv->kw;
 219
 220         if (kw->v_addr) {
 221                 pci_free_consistent(dev, kw->size, kw->v_addr, kw->dma_addr);
 222                 memset(kw, 0, sizeof(*kw));
 223         }
 224 }
 225
 226 int iwl_hw_nic_init(struct iwl_priv *priv)
 227 {
 228         unsigned long flags;
 229         struct iwl_rx_queue *rxq = &priv->rxq;
 230         int ret;
 231
 232         /* nic_init */
 233         spin_lock_irqsave(&priv->lock, flags);
 234         priv->cfg->ops->lib->apm_ops.init(priv);
 235         iwl_write32(priv, CSR_INT_COALESCING, 512 / 32);
 236         spin_unlock_irqrestore(&priv->lock, flags);
 237
 238         ret = priv->cfg->ops->lib->apm_ops.set_pwr_src(priv, IWL_PWR_SRC_VMAIN);
 239
 240         priv->cfg->ops->lib->apm_ops.config(priv);
 241
 242         /* Allocate the RX queue, or reset if it is already allocated */
 243         if (!rxq->bd) {
 244                 ret = iwl_rx_queue_alloc(priv);
 245                 if (ret) {
 246                         IWL_ERROR("Unable to initialize Rx queue\n");
 247                         return -ENOMEM;
 248                 }
 249         } else
 250                 iwl_rx_queue_reset(priv, rxq);
 251
 252         iwl_rx_replenish(priv);
 253
 254         iwl_rx_init(priv, rxq);
 255
 256         spin_lock_irqsave(&priv->lock, flags);
 257
 258         rxq->need_update = 1;
 259         iwl_rx_queue_update_write_ptr(priv, rxq);
 260
 261         spin_unlock_irqrestore(&priv->lock, flags);
 262
 263         /* Allocate and init all Tx and Command queues */
 264         ret = iwl_txq_ctx_reset(priv);
 265         if (ret)
 266                 return ret;
 267
 268         set_bit(STATUS_INIT, &priv->status);
 269
 270         return 0;
 271 }
 272 EXPORT_SYMBOL(iwl_hw_nic_init);
 273
 274 /**
 275  * iwl_clear_stations_table - Clear the driver's station table
 276  *
 277  * NOTE:  This does not clear or otherwise alter the device's station table.
 278  */
 279 void iwl_clear_stations_table(struct iwl_priv *priv)
 280 {
 281         unsigned long flags;
 282
 283         spin_lock_irqsave(&priv->sta_lock, flags);
 284
 285         if (iwl_is_alive(priv) &&
 286            !test_bit(STATUS_EXIT_PENDING, &priv->status) &&
 287            iwl_send_cmd_pdu_async(priv, REPLY_REMOVE_ALL_STA, 0, NULL, NULL))
 288                 IWL_ERROR("Couldn't clear the station table\n");
 289
 290         priv->num_stations = 0;
 291         memset(priv->stations, 0, sizeof(priv->stations));
 292
 293         spin_unlock_irqrestore(&priv->sta_lock, flags);
 294 }
 295 EXPORT_SYMBOL(iwl_clear_stations_table);
 296
 297 void iwl_reset_qos(struct iwl_priv *priv)
 298 {
 299         u16 cw_min = 15;
 300         u16 cw_max = 1023;
 301         u8 aifs = 2;
 302         u8 is_legacy = 0;
 303         unsigned long flags;
 304         int i;
 305
 306         spin_lock_irqsave(&priv->lock, flags);
 307         priv->qos_data.qos_active = 0;
 308
 309         if (priv->iw_mode == NL80211_IFTYPE_ADHOC) {
 310                 if (priv->qos_data.qos_enable)
 311                         priv->qos_data.qos_active = 1;
 312                 if (!(priv->active_rate & 0xfff0)) {
 313                         cw_min = 31;
 314                         is_legacy = 1;
 315                 }
 316         } else if (priv->iw_mode == NL80211_IFTYPE_AP) {
 317                 if (priv->qos_data.qos_enable)
 318                         priv->qos_data.qos_active = 1;
 319         } else if (!(priv->staging_rxon.flags & RXON_FLG_SHORT_SLOT_MSK)) {
 320                 cw_min = 31;
 321                 is_legacy = 1;
 322         }
 323
 324         if (priv->qos_data.qos_active)
 325                 aifs = 3;
 326
 327         priv->qos_data.def_qos_parm.ac[0].cw_min = cpu_to_le16(cw_min);
 328         priv->qos_data.def_qos_parm.ac[0].cw_max = cpu_to_le16(cw_max);
 329         priv->qos_data.def_qos_parm.ac[0].aifsn = aifs;
 330         priv->qos_data.def_qos_parm.ac[0].edca_txop = 0;
 331         priv->qos_data.def_qos_parm.ac[0].reserved1 = 0;
 332
 333         if (priv->qos_data.qos_active) {
 334                 i = 1;
 335                 priv->qos_data.def_qos_parm.ac[i].cw_min = cpu_to_le16(cw_min);
 336                 priv->qos_data.def_qos_parm.ac[i].cw_max = cpu_to_le16(cw_max);
 337                 priv->qos_data.def_qos_parm.ac[i].aifsn = 7;
 338                 priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
 339                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
 340
 341                 i = 2;
 342                 priv->qos_data.def_qos_parm.ac[i].cw_min =
 343                         cpu_to_le16((cw_min + 1) / 2 - 1);
 344                 priv->qos_data.def_qos_parm.ac[i].cw_max =
 345                         cpu_to_le16(cw_max);
 346                 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
 347                 if (is_legacy)
 348                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
 349                                 cpu_to_le16(6016);
 350                 else
 351                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
 352                                 cpu_to_le16(3008);
 353                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
 354
 355                 i = 3;
 356                 priv->qos_data.def_qos_parm.ac[i].cw_min =
 357                         cpu_to_le16((cw_min + 1) / 4 - 1);
 358                 priv->qos_data.def_qos_parm.ac[i].cw_max =
 359                         cpu_to_le16((cw_max + 1) / 2 - 1);
 360                 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
 361                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
 362                 if (is_legacy)
 363                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
 364                                 cpu_to_le16(3264);
 365                 else
 366                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
 367                                 cpu_to_le16(1504);
 368         } else {
 369                 for (i = 1; i < 4; i++) {
 370                         priv->qos_data.def_qos_parm.ac[i].cw_min =
 371                                 cpu_to_le16(cw_min);
 372                         priv->qos_data.def_qos_parm.ac[i].cw_max =
 373                                 cpu_to_le16(cw_max);
 374                         priv->qos_data.def_qos_parm.ac[i].aifsn = aifs;
 375                         priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
 376                         priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
 377                 }
 378         }
 379         IWL_DEBUG_QOS("set QoS to default \n");
 380
 381         spin_unlock_irqrestore(&priv->lock, flags);
 382 }
 383 EXPORT_SYMBOL(iwl_reset_qos);
 384
 385 #define MAX_BIT_RATE_40_MHZ 0x96 /* 150 Mbps */
 386 #define MAX_BIT_RATE_20_MHZ 0x48 /* 72 Mbps */
 387 static void iwlcore_init_ht_hw_capab(const struct iwl_priv *priv,
 388                               struct ieee80211_ht_info *ht_info,
 389                               enum ieee80211_band band)
 390 {
 391         u16 max_bit_rate = 0;
 392         u8 rx_chains_num = priv->hw_params.rx_chains_num;
 393         u8 tx_chains_num = priv->hw_params.tx_chains_num;
 394
 395         ht_info->cap = 0;
 396         memset(ht_info->supp_mcs_set, 0, 16);
 397
 398         ht_info->ht_supported = 1;
 399
 400         ht_info->cap |= (u16)IEEE80211_HT_CAP_GRN_FLD;
 401         ht_info->cap |= (u16)IEEE80211_HT_CAP_SGI_20;
 402         ht_info->cap |= (u16)(IEEE80211_HT_CAP_SM_PS &
 403                              (WLAN_HT_CAP_SM_PS_DISABLED << 2));
 404
 405         max_bit_rate = MAX_BIT_RATE_20_MHZ;
 406         if (priv->hw_params.fat_channel & BIT(band)) {
 407                 ht_info->cap |= (u16)IEEE80211_HT_CAP_SUP_WIDTH;
 408                 ht_info->cap |= (u16)IEEE80211_HT_CAP_SGI_40;
 409                 ht_info->supp_mcs_set[4] = 0x01;
 410                 max_bit_rate = MAX_BIT_RATE_40_MHZ;
 411         }
 412
 413         if (priv->cfg->mod_params->amsdu_size_8K)
 414                 ht_info->cap |= (u16)IEEE80211_HT_CAP_MAX_AMSDU;
 415
 416         ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
 417         ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;
 418
 419         ht_info->supp_mcs_set[0] = 0xFF;
 420         if (rx_chains_num >= 2)
 421                 ht_info->supp_mcs_set[1] = 0xFF;
 422         if (rx_chains_num >= 3)
 423                 ht_info->supp_mcs_set[2] = 0xFF;
 424
 425         /* Highest supported Rx data rate */
 426         max_bit_rate *= rx_chains_num;
 427         ht_info->supp_mcs_set[10] = (u8)(max_bit_rate & 0x00FF);
 428         ht_info->supp_mcs_set[11] = (u8)((max_bit_rate & 0xFF00) >> 8);
 429
 430         /* Tx MCS capabilities */
 431         ht_info->supp_mcs_set[12] = IEEE80211_HT_CAP_MCS_TX_DEFINED;
 432         if (tx_chains_num != rx_chains_num) {
 433                 ht_info->supp_mcs_set[12] |= IEEE80211_HT_CAP_MCS_TX_RX_DIFF;
 434                 ht_info->supp_mcs_set[12] |= ((tx_chains_num - 1) << 2);
 435         }
 436 }
 437
 438 static void iwlcore_init_hw_rates(struct iwl_priv *priv,
 439                               struct ieee80211_rate *rates)
 440 {
 441         int i;
 442
 443         for (i = 0; i < IWL_RATE_COUNT; i++) {
 444                 rates[i].bitrate = iwl_rates[i].ieee * 5;
 445                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
 446                 rates[i].hw_value_short = i;
 447                 rates[i].flags = 0;
 448                 if ((i > IWL_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
 449                         /*
 450                          * If CCK != 1M then set short preamble rate flag.
 451                          */
 452                         rates[i].flags |=
 453                                 (iwl_rates[i].plcp == IWL_RATE_1M_PLCP) ?
 454                                         0 : IEEE80211_RATE_SHORT_PREAMBLE;
 455                 }
 456         }
 457 }
 458
 459 /**
 460  * iwlcore_init_geos - Initialize mac80211's geo/channel info based from eeprom
 461  */
 462 static int iwlcore_init_geos(struct iwl_priv *priv)
 463 {
 464         struct iwl_channel_info *ch;
 465         struct ieee80211_supported_band *sband;
 466         struct ieee80211_channel *channels;
 467         struct ieee80211_channel *geo_ch;
 468         struct ieee80211_rate *rates;
 469         int i = 0;
 470
 471         if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
 472             priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
 473                 IWL_DEBUG_INFO("Geography modes already initialized.\n");
 474                 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
 475                 return 0;
 476         }
 477
 478         channels = kzalloc(sizeof(struct ieee80211_channel) *
 479                            priv->channel_count, GFP_KERNEL);
 480         if (!channels)
 481                 return -ENOMEM;
 482
 483         rates = kzalloc((sizeof(struct ieee80211_rate) * (IWL_RATE_COUNT + 1)),
 484                         GFP_KERNEL);
 485         if (!rates) {
 486                 kfree(channels);
 487                 return -ENOMEM;
 488         }
 489
 490         /* 5.2GHz channels start after the 2.4GHz channels */
 491         sband = &priv->bands[IEEE80211_BAND_5GHZ];
 492         sband->channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)];
 493         /* just OFDM */
 494         sband->bitrates = &rates[IWL_FIRST_OFDM_RATE];
 495         sband->n_bitrates = IWL_RATE_COUNT - IWL_FIRST_OFDM_RATE;
 496
 497         if (priv->cfg->sku & IWL_SKU_N)
 498                 iwlcore_init_ht_hw_capab(priv, &sband->ht_info,
 499                                          IEEE80211_BAND_5GHZ);
 500
 501         sband = &priv->bands[IEEE80211_BAND_2GHZ];
 502         sband->channels = channels;
 503         /* OFDM & CCK */
 504         sband->bitrates = rates;
 505         sband->n_bitrates = IWL_RATE_COUNT;
 506
 507         if (priv->cfg->sku & IWL_SKU_N)
 508                 iwlcore_init_ht_hw_capab(priv, &sband->ht_info,
 509                                          IEEE80211_BAND_2GHZ);
 510
 511         priv->ieee_channels = channels;
 512         priv->ieee_rates = rates;
 513
 514         iwlcore_init_hw_rates(priv, rates);
 515
 516         for (i = 0;  i < priv->channel_count; i++) {
 517                 ch = &priv->channel_info[i];
 518
 519                 /* FIXME: might be removed if scan is OK */
 520                 if (!is_channel_valid(ch))
 521                         continue;
 522
 523                 if (is_channel_a_band(ch))
 524                         sband =  &priv->bands[IEEE80211_BAND_5GHZ];
 525                 else
 526                         sband =  &priv->bands[IEEE80211_BAND_2GHZ];
 527
 528                 geo_ch = &sband->channels[sband->n_channels++];
 529
 530                 geo_ch->center_freq =
 531                                 ieee80211_channel_to_frequency(ch->channel);
 532                 geo_ch->max_power = ch->max_power_avg;
 533                 geo_ch->max_antenna_gain = 0xff;
 534                 geo_ch->hw_value = ch->channel;
 535
 536                 if (is_channel_valid(ch)) {
 537                         if (!(ch->flags & EEPROM_CHANNEL_IBSS))
 538                                 geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
 539
 540                         if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
 541                                 geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
 542
 543                         if (ch->flags & EEPROM_CHANNEL_RADAR)
 544                                 geo_ch->flags |= IEEE80211_CHAN_RADAR;
 545
 546                         geo_ch->flags |= ch->fat_extension_channel;
 547
 548                         if (ch->max_power_avg > priv->tx_power_channel_lmt)
 549                                 priv->tx_power_channel_lmt = ch->max_power_avg;
 550                 } else {
 551                         geo_ch->flags |= IEEE80211_CHAN_DISABLED;
 552                 }
 553
 554                 /* Save flags for reg domain usage */
 555                 geo_ch->orig_flags = geo_ch->flags;
 556
 557                 IWL_DEBUG_INFO("Channel %d Freq=%d[%sGHz] %s flag=0x%X\n",
 558                                 ch->channel, geo_ch->center_freq,
 559                                 is_channel_a_band(ch) ?  "5.2" : "2.4",
 560                                 geo_ch->flags & IEEE80211_CHAN_DISABLED ?
 561                                 "restricted" : "valid",
 562                                  geo_ch->flags);
 563         }
 564
 565         if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) &&
 566              priv->cfg->sku & IWL_SKU_A) {
 567                 printk(KERN_INFO DRV_NAME
 568                        ": Incorrectly detected BG card as ABG.  Please send "
 569                        "your PCI ID 0x%04X:0x%04X to maintainer.\n",
 570                        priv->pci_dev->device, priv->pci_dev->subsystem_device);
 571                 priv->cfg->sku &= ~IWL_SKU_A;
 572         }
 573
 574         printk(KERN_INFO DRV_NAME
 575                ": Tunable channels: %d 802.11bg, %d 802.11a channels\n",
 576                priv->bands[IEEE80211_BAND_2GHZ].n_channels,
 577                priv->bands[IEEE80211_BAND_5GHZ].n_channels);
 578
 579
 580         set_bit(STATUS_GEO_CONFIGURED, &priv->status);
 581
 582         return 0;
 583 }
 584
 585 /*
 586  * iwlcore_free_geos - undo allocations in iwlcore_init_geos
 587  */
 588 static void iwlcore_free_geos(struct iwl_priv *priv)
 589 {
 590         kfree(priv->ieee_channels);
 591         kfree(priv->ieee_rates);
 592         clear_bit(STATUS_GEO_CONFIGURED, &priv->status);
 593 }
 594
 595 static bool is_single_rx_stream(struct iwl_priv *priv)
 596 {
 597         return !priv->current_ht_config.is_ht ||
 598                ((priv->current_ht_config.supp_mcs_set[1] == 0) &&
 599                 (priv->current_ht_config.supp_mcs_set[2] == 0));
 600 }
 601
 602 static u8 iwl_is_channel_extension(struct iwl_priv *priv,
 603                                    enum ieee80211_band band,
 604                                    u16 channel, u8 extension_chan_offset)
 605 {
 606         const struct iwl_channel_info *ch_info;
 607
 608         ch_info = iwl_get_channel_info(priv, band, channel);
 609         if (!is_channel_valid(ch_info))
 610                 return 0;
 611
 612         if (extension_chan_offset == IEEE80211_HT_IE_CHA_SEC_ABOVE)
 613                 return !(ch_info->fat_extension_channel &
 614                                         IEEE80211_CHAN_NO_FAT_ABOVE);
 615         else if (extension_chan_offset == IEEE80211_HT_IE_CHA_SEC_BELOW)
 616                 return !(ch_info->fat_extension_channel &
 617                                         IEEE80211_CHAN_NO_FAT_BELOW);
 618
 619         return 0;
 620 }
 621
 622 u8 iwl_is_fat_tx_allowed(struct iwl_priv *priv,
 623                              struct ieee80211_ht_info *sta_ht_inf)
 624 {
 625         struct iwl_ht_info *iwl_ht_conf = &priv->current_ht_config;
 626
 627         if ((!iwl_ht_conf->is_ht) ||
 628            (iwl_ht_conf->supported_chan_width != IWL_CHANNEL_WIDTH_40MHZ) ||
 629            (iwl_ht_conf->extension_chan_offset == IEEE80211_HT_IE_CHA_SEC_NONE))
 630                 return 0;
 631
 632         if (sta_ht_inf) {
 633                 if ((!sta_ht_inf->ht_supported) ||
 634                    (!(sta_ht_inf->cap & IEEE80211_HT_CAP_SUP_WIDTH)))
 635                         return 0;
 636         }
 637
 638         return iwl_is_channel_extension(priv, priv->band,
 639                                          iwl_ht_conf->control_channel,
 640                                          iwl_ht_conf->extension_chan_offset);
 641 }
 642 EXPORT_SYMBOL(iwl_is_fat_tx_allowed);
 643
 644 void iwl_set_rxon_ht(struct iwl_priv *priv, struct iwl_ht_info *ht_info)
 645 {
 646         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
 647         u32 val;
 648
 649         if (!ht_info->is_ht)
 650                 return;
 651
 652         /* Set up channel bandwidth:  20 MHz only, or 20/40 mixed if fat ok */
 653         if (iwl_is_fat_tx_allowed(priv, NULL))
 654                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED_MSK;
 655         else
 656                 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED_MSK |
 657                                  RXON_FLG_CHANNEL_MODE_PURE_40_MSK);
 658
 659         if (le16_to_cpu(rxon->channel) != ht_info->control_channel) {
 660                 IWL_DEBUG_ASSOC("control diff than current %d %d\n",
 661                                 le16_to_cpu(rxon->channel),
 662                                 ht_info->control_channel);
 663                 return;
 664         }
 665
 666         /* Note: control channel is opposite of extension channel */
 667         switch (ht_info->extension_chan_offset) {
 668         case IEEE80211_HT_IE_CHA_SEC_ABOVE:
 669                 rxon->flags &= ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
 670                 break;
 671         case IEEE80211_HT_IE_CHA_SEC_BELOW:
 672                 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
 673                 break;
 674         case IEEE80211_HT_IE_CHA_SEC_NONE:
 675         default:
 676                 rxon->flags &= ~RXON_FLG_CHANNEL_MODE_MIXED_MSK;
 677                 break;
 678         }
 679
 680         val = ht_info->ht_protection;
 681
 682         rxon->flags |= cpu_to_le32(val << RXON_FLG_HT_OPERATING_MODE_POS);
 683
 684         iwl_set_rxon_chain(priv);
 685
 686         IWL_DEBUG_ASSOC("supported HT rate 0x%X 0x%X 0x%X "
 687                         "rxon flags 0x%X operation mode :0x%X "
 688                         "extension channel offset 0x%x "
 689                         "control chan %d\n",
 690                         ht_info->supp_mcs_set[0],
 691                         ht_info->supp_mcs_set[1],
 692                         ht_info->supp_mcs_set[2],
 693                         le32_to_cpu(rxon->flags), ht_info->ht_protection,
 694                         ht_info->extension_chan_offset,
 695                         ht_info->control_channel);
 696         return;
 697 }
 698 EXPORT_SYMBOL(iwl_set_rxon_ht);
 699
 700 /*
 701  * Determine how many receiver/antenna chains to use.
 702  * More provides better reception via diversity.  Fewer saves power.
 703  * MIMO (dual stream) requires at least 2, but works better with 3.
 704  * This does not determine *which* chains to use, just how many.
 705  */
 706 static int iwl_get_active_rx_chain_count(struct iwl_priv *priv)
 707 {
 708         bool is_single = is_single_rx_stream(priv);
 709         bool is_cam = !test_bit(STATUS_POWER_PMI, &priv->status);
 710
 711         /* # of Rx chains to use when expecting MIMO. */
 712         if (is_single || (!is_cam && (priv->current_ht_config.sm_ps ==
 713                                                  WLAN_HT_CAP_SM_PS_STATIC)))
 714                 return 2;
 715         else
 716                 return 3;
 717 }
 718
 719 static int iwl_get_idle_rx_chain_count(struct iwl_priv *priv, int active_cnt)
 720 {
 721         int idle_cnt;
 722         bool is_cam = !test_bit(STATUS_POWER_PMI, &priv->status);
 723         /* # Rx chains when idling and maybe trying to save power */
 724         switch (priv->current_ht_config.sm_ps) {
 725         case WLAN_HT_CAP_SM_PS_STATIC:
 726         case WLAN_HT_CAP_SM_PS_DYNAMIC:
 727                 idle_cnt = (is_cam) ? 2 : 1;
 728                 break;
 729         case WLAN_HT_CAP_SM_PS_DISABLED:
 730                 idle_cnt = (is_cam) ? active_cnt : 1;
 731                 break;
 732         case WLAN_HT_CAP_SM_PS_INVALID:
 733         default:
 734                 IWL_ERROR("invalide mimo ps mode %d\n",
 735                            priv->current_ht_config.sm_ps);
 736                 WARN_ON(1);
 737                 idle_cnt = -1;
 738                 break;
 739         }
 740         return idle_cnt;
 741 }
 742
 743 /* up to 4 chains */
 744 static u8 iwl_count_chain_bitmap(u32 chain_bitmap)
 745 {
 746         u8 res;
 747         res = (chain_bitmap & BIT(0)) >> 0;
 748         res += (chain_bitmap & BIT(1)) >> 1;
 749         res += (chain_bitmap & BIT(2)) >> 2;
 750         res += (chain_bitmap & BIT(4)) >> 4;
 751         return res;
 752 }
 753
 754 /**
 755  * iwl_set_rxon_chain - Set up Rx chain usage in "staging" RXON image
 756  *
 757  * Selects how many and which Rx receivers/antennas/chains to use.
 758  * This should not be used for scan command ... it puts data in wrong place.
 759  */
 760 void iwl_set_rxon_chain(struct iwl_priv *priv)
 761 {
 762         bool is_single = is_single_rx_stream(priv);
 763         bool is_cam = !test_bit(STATUS_POWER_PMI, &priv->status);
 764         u8 idle_rx_cnt, active_rx_cnt, valid_rx_cnt;
 765         u32 active_chains;
 766         u16 rx_chain;
 767
 768         /* Tell uCode which antennas are actually connected.
 769          * Before first association, we assume all antennas are connected.
 770          * Just after first association, iwl_chain_noise_calibration()
 771          *    checks which antennas actually *are* connected. */
 772          if (priv->chain_noise_data.active_chains)
 773                 active_chains = priv->chain_noise_data.active_chains;
 774         else
 775                 active_chains = priv->hw_params.valid_rx_ant;
 776
 777         rx_chain = active_chains << RXON_RX_CHAIN_VALID_POS;
 778
 779         /* How many receivers should we use? */
 780         active_rx_cnt = iwl_get_active_rx_chain_count(priv);
 781         idle_rx_cnt = iwl_get_idle_rx_chain_count(priv, active_rx_cnt);
 782
 783
 784         /* correct rx chain count according hw settings
 785          * and chain noise calibration
 786          */
 787         valid_rx_cnt = iwl_count_chain_bitmap(active_chains);
 788         if (valid_rx_cnt < active_rx_cnt)
 789                 active_rx_cnt = valid_rx_cnt;
 790
 791         if (valid_rx_cnt < idle_rx_cnt)
 792                 idle_rx_cnt = valid_rx_cnt;
 793
 794         rx_chain |= active_rx_cnt << RXON_RX_CHAIN_MIMO_CNT_POS;
 795         rx_chain |= idle_rx_cnt  << RXON_RX_CHAIN_CNT_POS;
 796
 797         priv->staging_rxon.rx_chain = cpu_to_le16(rx_chain);
 798
 799         if (!is_single && (active_rx_cnt >= 2) && is_cam)
 800                 priv->staging_rxon.rx_chain |= RXON_RX_CHAIN_MIMO_FORCE_MSK;
 801         else
 802                 priv->staging_rxon.rx_chain &= ~RXON_RX_CHAIN_MIMO_FORCE_MSK;
 803
 804         IWL_DEBUG_ASSOC("rx_chain=0x%X active=%d idle=%d\n",
 805                         priv->staging_rxon.rx_chain,
 806                         active_rx_cnt, idle_rx_cnt);
 807
 808         WARN_ON(active_rx_cnt == 0 || idle_rx_cnt == 0 ||
 809                 active_rx_cnt < idle_rx_cnt);
 810 }
 811 EXPORT_SYMBOL(iwl_set_rxon_chain);
 812
 813 /**
 814  * iwl_set_rxon_channel - Set the phymode and channel values in staging RXON
 815  * @phymode: MODE_IEEE80211A sets to 5.2GHz; all else set to 2.4GHz
 816  * @channel: Any channel valid for the requested phymode
 817
 818  * In addition to setting the staging RXON, priv->phymode is also set.
 819  *
 820  * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
 821  * in the staging RXON flag structure based on the phymode
 822  */
 823 int iwl_set_rxon_channel(struct iwl_priv *priv, struct ieee80211_channel *ch)
 824 {
 825         enum ieee80211_band band = ch->band;
 826         u16 channel = ieee80211_frequency_to_channel(ch->center_freq);
 827
 828         if (!iwl_get_channel_info(priv, band, channel)) {
 829                 IWL_DEBUG_INFO("Could not set channel to %d [%d]\n",
 830                                channel, band);
 831                 return -EINVAL;
 832         }
 833
 834         if ((le16_to_cpu(priv->staging_rxon.channel) == channel) &&
 835             (priv->band == band))
 836                 return 0;
 837
 838         priv->staging_rxon.channel = cpu_to_le16(channel);
 839         if (band == IEEE80211_BAND_5GHZ)
 840                 priv->staging_rxon.flags &= ~RXON_FLG_BAND_24G_MSK;
 841         else
 842                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
 843
 844         priv->band = band;
 845
 846         IWL_DEBUG_INFO("Staging channel set to %d [%d]\n", channel, band);
 847
 848         return 0;
 849 }
 850 EXPORT_SYMBOL(iwl_set_rxon_channel);
 851
 852 int iwl_setup_mac(struct iwl_priv *priv)
 853 {
 854         int ret;
 855         struct ieee80211_hw *hw = priv->hw;
 856         hw->rate_control_algorithm = "iwl-agn-rs";
 857
 858         /* Tell mac80211 our characteristics */
 859         hw->flags = IEEE80211_HW_SIGNAL_DBM |
 860                     IEEE80211_HW_NOISE_DBM;
 861         hw->wiphy->interface_modes =
 862                 BIT(NL80211_IFTYPE_AP) |
 863                 BIT(NL80211_IFTYPE_STATION) |
 864                 BIT(NL80211_IFTYPE_ADHOC);
 865         /* Default value; 4 EDCA QOS priorities */
 866         hw->queues = 4;
 867         /* queues to support 11n aggregation */
 868         if (priv->cfg->sku & IWL_SKU_N)
 869                 hw->ampdu_queues = priv->cfg->mod_params->num_of_ampdu_queues;
 870
 871         hw->conf.beacon_int = 100;
 872         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
 873
 874         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
 875                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
 876                         &priv->bands[IEEE80211_BAND_2GHZ];
 877         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
 878                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
 879                         &priv->bands[IEEE80211_BAND_5GHZ];
 880
 881         ret = ieee80211_register_hw(priv->hw);
 882         if (ret) {
 883                 IWL_ERROR("Failed to register hw (error %d)\n", ret);
 884                 return ret;
 885         }
 886         priv->mac80211_registered = 1;
 887
 888         return 0;
 889 }
 890 EXPORT_SYMBOL(iwl_setup_mac);
 891
 892 int iwl_set_hw_params(struct iwl_priv *priv)
 893 {
 894         priv->hw_params.sw_crypto = priv->cfg->mod_params->sw_crypto;
 895         priv->hw_params.max_rxq_size = RX_QUEUE_SIZE;
 896         priv->hw_params.max_rxq_log = RX_QUEUE_SIZE_LOG;
 897         if (priv->cfg->mod_params->amsdu_size_8K)
 898                 priv->hw_params.rx_buf_size = IWL_RX_BUF_SIZE_8K;
 899         else
 900                 priv->hw_params.rx_buf_size = IWL_RX_BUF_SIZE_4K;
 901         priv->hw_params.max_pkt_size = priv->hw_params.rx_buf_size - 256;
 902
 903         if (priv->cfg->mod_params->disable_11n)
 904                 priv->cfg->sku &= ~IWL_SKU_N;
 905
 906         /* Device-specific setup */
 907         return priv->cfg->ops->lib->set_hw_params(priv);
 908 }
 909 EXPORT_SYMBOL(iwl_set_hw_params);
 910
 911 int iwl_init_drv(struct iwl_priv *priv)
 912 {
 913         int ret;
 914
 915         priv->retry_rate = 1;
 916         priv->ibss_beacon = NULL;
 917
 918         spin_lock_init(&priv->lock);
 919         spin_lock_init(&priv->power_data.lock);
 920         spin_lock_init(&priv->sta_lock);
 921         spin_lock_init(&priv->hcmd_lock);
 922
 923         INIT_LIST_HEAD(&priv->free_frames);
 924
 925         mutex_init(&priv->mutex);
 926
 927         /* Clear the driver's (not device's) station table */
 928         iwl_clear_stations_table(priv);
 929
 930         priv->data_retry_limit = -1;
 931         priv->ieee_channels = NULL;
 932         priv->ieee_rates = NULL;
 933         priv->band = IEEE80211_BAND_2GHZ;
 934
 935         priv->iw_mode = NL80211_IFTYPE_STATION;
 936
 937         priv->use_ant_b_for_management_frame = 1; /* start with ant B */
 938         priv->current_ht_config.sm_ps = WLAN_HT_CAP_SM_PS_DISABLED;
 939
 940         /* Choose which receivers/antennas to use */
 941         iwl_set_rxon_chain(priv);
 942         iwl_init_scan_params(priv);
 943
 944         if (priv->cfg->mod_params->enable_qos)
 945                 priv->qos_data.qos_enable = 1;
 946
 947         iwl_reset_qos(priv);
 948
 949         priv->qos_data.qos_active = 0;
 950         priv->qos_data.qos_cap.val = 0;
 951
 952         priv->rates_mask = IWL_RATES_MASK;
 953         /* If power management is turned on, default to AC mode */
 954         priv->power_mode = IWL_POWER_AC;
 955         priv->tx_power_user_lmt = IWL_TX_POWER_TARGET_POWER_MAX;
 956
 957         ret = iwl_init_channel_map(priv);
 958         if (ret) {
 959                 IWL_ERROR("initializing regulatory failed: %d\n", ret);
 960                 goto err;
 961         }
 962
 963         ret = iwlcore_init_geos(priv);
 964         if (ret) {
 965                 IWL_ERROR("initializing geos failed: %d\n", ret);
 966                 goto err_free_channel_map;
 967         }
 968
 969         return 0;
 970
 971 err_free_channel_map:
 972         iwl_free_channel_map(priv);
 973 err:
 974         return ret;
 975 }
 976 EXPORT_SYMBOL(iwl_init_drv);
 977
 978 int iwl_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force)
 979 {
 980         int ret = 0;
 981         if (tx_power < IWL_TX_POWER_TARGET_POWER_MIN) {
 982                 IWL_WARNING("Requested user TXPOWER %d below limit.\n",
 983                             priv->tx_power_user_lmt);
 984                 return -EINVAL;
 985         }
 986
 987         if (tx_power > IWL_TX_POWER_TARGET_POWER_MAX) {
 988                 IWL_WARNING("Requested user TXPOWER %d above limit.\n",
 989                             priv->tx_power_user_lmt);
 990                 return -EINVAL;
 991         }
 992
 993         if (priv->tx_power_user_lmt != tx_power)
 994                 force = true;
 995
 996         priv->tx_power_user_lmt = tx_power;
 997
 998         if (force && priv->cfg->ops->lib->send_tx_power)
 999                 ret = priv->cfg->ops->lib->send_tx_power(priv);
1000
1001         return ret;
1002 }
1003 EXPORT_SYMBOL(iwl_set_tx_power);
1004
1005 void iwl_uninit_drv(struct iwl_priv *priv)
1006 {
1007         iwl_calib_free_results(priv);
1008         iwlcore_free_geos(priv);
1009         iwl_free_channel_map(priv);
1010         kfree(priv->scan);
1011 }
1012 EXPORT_SYMBOL(iwl_uninit_drv);
1013
1014 int iwl_send_statistics_request(struct iwl_priv *priv, u8 flags)
1015 {
1016         u32 stat_flags = 0;
1017         struct iwl_host_cmd cmd = {
1018                 .id = REPLY_STATISTICS_CMD,
1019                 .meta.flags = flags,
1020                 .len = sizeof(stat_flags),
1021                 .data = (u8 *) &stat_flags,
1022         };
1023         return iwl_send_cmd(priv, &cmd);
1024 }
1025 EXPORT_SYMBOL(iwl_send_statistics_request);
1026
1027 /**
1028  * iwl_verify_inst_sparse - verify runtime uCode image in card vs. host,
1029  *   using sample data 100 bytes apart.  If these sample points are good,
1030  *   it's a pretty good bet that everything between them is good, too.
1031  */
1032 static int iwlcore_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
1033 {
1034         u32 val;
1035         int ret = 0;
1036         u32 errcnt = 0;
1037         u32 i;
1038
1039         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
1040
1041         ret = iwl_grab_nic_access(priv);
1042         if (ret)
1043                 return ret;
1044
1045         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
1046                 /* read data comes through single port, auto-incr addr */
1047                 /* NOTE: Use the debugless read so we don't flood kernel log
1048                  * if IWL_DL_IO is set */
1049                 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
1050                         i + RTC_INST_LOWER_BOUND);
1051                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1052                 if (val != le32_to_cpu(*image)) {
1053                         ret = -EIO;
1054                         errcnt++;
1055                         if (errcnt >= 3)
1056                                 break;
1057                 }
1058         }
1059
1060         iwl_release_nic_access(priv);
1061
1062         return ret;
1063 }
1064
1065 /**
1066  * iwlcore_verify_inst_full - verify runtime uCode image in card vs. host,
1067  *     looking at all data.
1068  */
1069 static int iwl_verify_inst_full(struct iwl_priv *priv, __le32 *image,
1070                                  u32 len)
1071 {
1072         u32 val;
1073         u32 save_len = len;
1074         int ret = 0;
1075         u32 errcnt;
1076
1077         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
1078
1079         ret = iwl_grab_nic_access(priv);
1080         if (ret)
1081                 return ret;
1082
1083         iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR, RTC_INST_LOWER_BOUND);
1084
1085         errcnt = 0;
1086         for (; len > 0; len -= sizeof(u32), image++) {
1087                 /* read data comes through single port, auto-incr addr */
1088                 /* NOTE: Use the debugless read so we don't flood kernel log
1089                  * if IWL_DL_IO is set */
1090                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1091                 if (val != le32_to_cpu(*image)) {
1092                         IWL_ERROR("uCode INST section is invalid at "
1093                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
1094                                   save_len - len, val, le32_to_cpu(*image));
1095                         ret = -EIO;
1096                         errcnt++;
1097                         if (errcnt >= 20)
1098                                 break;
1099                 }
1100         }
1101
1102         iwl_release_nic_access(priv);
1103
1104         if (!errcnt)
1105                 IWL_DEBUG_INFO
1106                     ("ucode image in INSTRUCTION memory is good\n");
1107
1108         return ret;
1109 }
1110
1111 /**
1112  * iwl_verify_ucode - determine which instruction image is in SRAM,
1113  *    and verify its contents
1114  */
1115 int iwl_verify_ucode(struct iwl_priv *priv)
1116 {
1117         __le32 *image;
1118         u32 len;
1119         int ret;
1120
1121         /* Try bootstrap */
1122         image = (__le32 *)priv->ucode_boot.v_addr;
1123         len = priv->ucode_boot.len;
1124         ret = iwlcore_verify_inst_sparse(priv, image, len);
1125         if (!ret) {
1126                 IWL_DEBUG_INFO("Bootstrap uCode is good in inst SRAM\n");
1127                 return 0;
1128         }
1129
1130         /* Try initialize */
1131         image = (__le32 *)priv->ucode_init.v_addr;
1132         len = priv->ucode_init.len;
1133         ret = iwlcore_verify_inst_sparse(priv, image, len);
1134         if (!ret) {
1135                 IWL_DEBUG_INFO("Initialize uCode is good in inst SRAM\n");
1136                 return 0;
1137         }
1138
1139         /* Try runtime/protocol */
1140         image = (__le32 *)priv->ucode_code.v_addr;
1141         len = priv->ucode_code.len;
1142         ret = iwlcore_verify_inst_sparse(priv, image, len);
1143         if (!ret) {
1144                 IWL_DEBUG_INFO("Runtime uCode is good in inst SRAM\n");
1145                 return 0;
1146         }
1147
1148         IWL_ERROR("NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
1149
1150         /* Since nothing seems to match, show first several data entries in
1151          * instruction SRAM, so maybe visual inspection will give a clue.
1152          * Selection of bootstrap image (vs. other images) is arbitrary. */
1153         image = (__le32 *)priv->ucode_boot.v_addr;
1154         len = priv->ucode_boot.len;
1155         ret = iwl_verify_inst_full(priv, image, len);
1156
1157         return ret;
1158 }
1159 EXPORT_SYMBOL(iwl_verify_ucode);
1160
1161 static const char *desc_lookup(int i)
1162 {
1163         switch (i) {
1164         case 1:
1165                 return "FAIL";
1166         case 2:
1167                 return "BAD_PARAM";
1168         case 3:
1169                 return "BAD_CHECKSUM";
1170         case 4:
1171                 return "NMI_INTERRUPT";
1172         case 5:
1173                 return "SYSASSERT";
1174         case 6:
1175                 return "FATAL_ERROR";
1176         }
1177
1178         return "UNKNOWN";
1179 }
1180
1181 #define ERROR_START_OFFSET  (1 * sizeof(u32))
1182 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
1183
1184 void iwl_dump_nic_error_log(struct iwl_priv *priv)
1185 {
1186         u32 data2, line;
1187         u32 desc, time, count, base, data1;
1188         u32 blink1, blink2, ilink1, ilink2;
1189         int ret;
1190
1191         if (priv->ucode_type == UCODE_INIT)
1192                 base = le32_to_cpu(priv->card_alive_init.error_event_table_ptr);
1193         else
1194                 base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
1195
1196         if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
1197                 IWL_ERROR("Not valid error log pointer 0x%08X\n", base);
1198                 return;
1199         }
1200
1201         ret = iwl_grab_nic_access(priv);
1202         if (ret) {
1203                 IWL_WARNING("Can not read from adapter at this time.\n");
1204                 return;
1205         }
1206
1207         count = iwl_read_targ_mem(priv, base);
1208
1209         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
1210                 IWL_ERROR("Start IWL Error Log Dump:\n");
1211                 IWL_ERROR("Status: 0x%08lX, count: %d\n", priv->status, count);
1212         }
1213
1214         desc = iwl_read_targ_mem(priv, base + 1 * sizeof(u32));
1215         blink1 = iwl_read_targ_mem(priv, base + 3 * sizeof(u32));
1216         blink2 = iwl_read_targ_mem(priv, base + 4 * sizeof(u32));
1217         ilink1 = iwl_read_targ_mem(priv, base + 5 * sizeof(u32));
1218         ilink2 = iwl_read_targ_mem(priv, base + 6 * sizeof(u32));
1219         data1 = iwl_read_targ_mem(priv, base + 7 * sizeof(u32));
1220         data2 = iwl_read_targ_mem(priv, base + 8 * sizeof(u32));
1221         line = iwl_read_targ_mem(priv, base + 9 * sizeof(u32));
1222         time = iwl_read_targ_mem(priv, base + 11 * sizeof(u32));
1223
1224         IWL_ERROR("Desc        Time       "
1225                 "data1      data2      line\n");
1226         IWL_ERROR("%-13s (#%d) %010u 0x%08X 0x%08X %u\n",
1227                 desc_lookup(desc), desc, time, data1, data2, line);
1228         IWL_ERROR("blink1  blink2  ilink1  ilink2\n");
1229         IWL_ERROR("0x%05X 0x%05X 0x%05X 0x%05X\n", blink1, blink2,
1230                 ilink1, ilink2);
1231
1232         iwl_release_nic_access(priv);
1233 }
1234 EXPORT_SYMBOL(iwl_dump_nic_error_log);
1235
1236 #define EVENT_START_OFFSET  (4 * sizeof(u32))
1237
1238 /**
1239  * iwl_print_event_log - Dump error event log to syslog
1240  *
1241  * NOTE: Must be called with iwl_grab_nic_access() already obtained!
1242  */
1243 static void iwl_print_event_log(struct iwl_priv *priv, u32 start_idx,
1244                                 u32 num_events, u32 mode)
1245 {
1246         u32 i;
1247         u32 base;       /* SRAM byte address of event log header */
1248         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
1249         u32 ptr;        /* SRAM byte address of log data */
1250         u32 ev, time, data; /* event log data */
1251
1252         if (num_events == 0)
1253                 return;
1254         if (priv->ucode_type == UCODE_INIT)
1255                 base = le32_to_cpu(priv->card_alive_init.log_event_table_ptr);
1256         else
1257                 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1258
1259         if (mode == 0)
1260                 event_size = 2 * sizeof(u32);
1261         else
1262                 event_size = 3 * sizeof(u32);
1263
1264         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
1265
1266         /* "time" is actually "data" for mode 0 (no timestamp).
1267         * place event id # at far right for easier visual parsing. */
1268         for (i = 0; i < num_events; i++) {
1269                 ev = iwl_read_targ_mem(priv, ptr);
1270                 ptr += sizeof(u32);
1271                 time = iwl_read_targ_mem(priv, ptr);
1272                 ptr += sizeof(u32);
1273                 if (mode == 0) {
1274                         /* data, ev */
1275                         IWL_ERROR("EVT_LOG:0x%08x:%04u\n", time, ev);
1276                 } else {
1277                         data = iwl_read_targ_mem(priv, ptr);
1278                         ptr += sizeof(u32);
1279                         IWL_ERROR("EVT_LOGT:%010u:0x%08x:%04u\n",
1280                                         time, data, ev);
1281                 }
1282         }
1283 }
1284
1285 void iwl_dump_nic_event_log(struct iwl_priv *priv)
1286 {
1287         int ret;
1288         u32 base;       /* SRAM byte address of event log header */
1289         u32 capacity;   /* event log capacity in # entries */
1290         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
1291         u32 num_wraps;  /* # times uCode wrapped to top of log */
1292         u32 next_entry; /* index of next entry to be written by uCode */
1293         u32 size;       /* # entries that we'll print */
1294
1295         if (priv->ucode_type == UCODE_INIT)
1296                 base = le32_to_cpu(priv->card_alive_init.log_event_table_ptr);
1297         else
1298                 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1299
1300         if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
1301                 IWL_ERROR("Invalid event log pointer 0x%08X\n", base);
1302                 return;
1303         }
1304
1305         ret = iwl_grab_nic_access(priv);
1306         if (ret) {
1307                 IWL_WARNING("Can not read from adapter at this time.\n");
1308                 return;
1309         }
1310
1311         /* event log header */
1312         capacity = iwl_read_targ_mem(priv, base);
1313         mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
1314         num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
1315         next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
1316
1317         size = num_wraps ? capacity : next_entry;
1318
1319         /* bail out if nothing in log */
1320         if (size == 0) {
1321                 IWL_ERROR("Start IWL Event Log Dump: nothing in log\n");
1322                 iwl_release_nic_access(priv);
1323                 return;
1324         }
1325
1326         IWL_ERROR("Start IWL Event Log Dump: display count %d, wraps %d\n",
1327                         size, num_wraps);
1328
1329         /* if uCode has wrapped back to top of log, start at the oldest entry,
1330          * i.e the next one that uCode would fill. */
1331         if (num_wraps)
1332                 iwl_print_event_log(priv, next_entry,
1333                                         capacity - next_entry, mode);
1334         /* (then/else) start at top of log */
1335         iwl_print_event_log(priv, 0, next_entry, mode);
1336
1337         iwl_release_nic_access(priv);
1338 }
1339 EXPORT_SYMBOL(iwl_dump_nic_event_log);
1340
1341 void iwl_rf_kill_ct_config(struct iwl_priv *priv)
1342 {
1343         struct iwl_ct_kill_config cmd;
1344         unsigned long flags;
1345         int ret = 0;
1346
1347         spin_lock_irqsave(&priv->lock, flags);
1348         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
1349                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
1350         spin_unlock_irqrestore(&priv->lock, flags);
1351
1352         cmd.critical_temperature_R =
1353                 cpu_to_le32(priv->hw_params.ct_kill_threshold);
1354
1355         ret = iwl_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD,
1356                                sizeof(cmd), &cmd);
1357         if (ret)
1358                 IWL_ERROR("REPLY_CT_KILL_CONFIG_CMD failed\n");
1359         else
1360                 IWL_DEBUG_INFO("REPLY_CT_KILL_CONFIG_CMD succeeded, "
1361                         "critical temperature is %d\n",
1362                         cmd.critical_temperature_R);
1363 }
1364 EXPORT_SYMBOL(iwl_rf_kill_ct_config);
1365
1366 /*
1367  * CARD_STATE_CMD
1368  *
1369  * Use: Sets the device's internal card state to enable, disable, or halt
1370  *
1371  * When in the 'enable' state the card operates as normal.
1372  * When in the 'disable' state, the card enters into a low power mode.
1373  * When in the 'halt' state, the card is shut down and must be fully
1374  * restarted to come back on.
1375  */
1376 static int iwl_send_card_state(struct iwl_priv *priv, u32 flags, u8 meta_flag)
1377 {
1378         struct iwl_host_cmd cmd = {
1379                 .id = REPLY_CARD_STATE_CMD,
1380                 .len = sizeof(u32),
1381                 .data = &flags,
1382                 .meta.flags = meta_flag,
1383         };
1384
1385         return iwl_send_cmd(priv, &cmd);
1386 }
1387
1388 void iwl_radio_kill_sw_disable_radio(struct iwl_priv *priv)
1389 {
1390         unsigned long flags;
1391
1392         if (test_bit(STATUS_RF_KILL_SW, &priv->status))
1393                 return;
1394
1395         IWL_DEBUG_RF_KILL("Manual SW RF KILL set to: RADIO OFF\n");
1396
1397         iwl_scan_cancel(priv);
1398         /* FIXME: This is a workaround for AP */
1399         if (priv->iw_mode != NL80211_IFTYPE_AP) {
1400                 spin_lock_irqsave(&priv->lock, flags);
1401                 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
1402                             CSR_UCODE_SW_BIT_RFKILL);
1403                 spin_unlock_irqrestore(&priv->lock, flags);
1404                 /* call the host command only if no hw rf-kill set */
1405                 if (!test_bit(STATUS_RF_KILL_HW, &priv->status) &&
1406                     iwl_is_ready(priv))
1407                         iwl_send_card_state(priv,
1408                                 CARD_STATE_CMD_DISABLE, 0);
1409                 set_bit(STATUS_RF_KILL_SW, &priv->status);
1410                         /* make sure mac80211 stop sending Tx frame */
1411                 if (priv->mac80211_registered)
1412                         ieee80211_stop_queues(priv->hw);
1413         }
1414 }
1415 EXPORT_SYMBOL(iwl_radio_kill_sw_disable_radio);
1416
1417 int iwl_radio_kill_sw_enable_radio(struct iwl_priv *priv)
1418 {
1419         unsigned long flags;
1420
1421         if (!test_bit(STATUS_RF_KILL_SW, &priv->status))
1422                 return 0;
1423
1424         IWL_DEBUG_RF_KILL("Manual SW RF KILL set to: RADIO ON\n");
1425
1426         spin_lock_irqsave(&priv->lock, flags);
1427         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
1428
1429         /* If the driver is up it will receive CARD_STATE_NOTIFICATION
1430          * notification where it will clear SW rfkill status.
1431          * Setting it here would break the handler. Only if the
1432          * interface is down we can set here since we don't
1433          * receive any further notification.
1434          */
1435         if (!priv->is_open)
1436                 clear_bit(STATUS_RF_KILL_SW, &priv->status);
1437         spin_unlock_irqrestore(&priv->lock, flags);
1438
1439         /* wake up ucode */
1440         msleep(10);
1441
1442         spin_lock_irqsave(&priv->lock, flags);
1443         iwl_read32(priv, CSR_UCODE_DRV_GP1);
1444         if (!iwl_grab_nic_access(priv))
1445                 iwl_release_nic_access(priv);
1446         spin_unlock_irqrestore(&priv->lock, flags);
1447
1448         if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
1449                 IWL_DEBUG_RF_KILL("Can not turn radio back on - "
1450                                   "disabled by HW switch\n");
1451                 return 0;
1452         }
1453
1454         /* If the driver is already loaded, it will receive
1455          * CARD_STATE_NOTIFICATION notifications and the handler will
1456          * call restart to reload the driver.
1457          */
1458         return 1;
1459 }
1460 EXPORT_SYMBOL(iwl_radio_kill_sw_enable_radio);