git.oblomov.eu Git - 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 <net/mac80211.h>
  32
  33 #include "iwl-eeprom.h"
  34 #include "iwl-dev.h" /* FIXME: remove */
  35 #include "iwl-debug.h"
  36 #include "iwl-core.h"
  37 #include "iwl-io.h"
  38 #include "iwl-rfkill.h"
  39 #include "iwl-power.h"
  40 #include "iwl-sta.h"
  41
  42
  43 MODULE_DESCRIPTION("iwl core");
  44 MODULE_VERSION(IWLWIFI_VERSION);
  45 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
  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 *info)
  92 {
  93         int rate_index;
  94         struct ieee80211_tx_rate *r = &info->control.rates[0];
  95
  96         info->antenna_sel_tx =
  97                 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
  98         if (rate_n_flags & RATE_MCS_HT_MSK)
  99                 r->flags |= IEEE80211_TX_RC_MCS;
 100         if (rate_n_flags & RATE_MCS_GF_MSK)
 101                 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
 102         if (rate_n_flags & RATE_MCS_FAT_MSK)
 103                 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
 104         if (rate_n_flags & RATE_MCS_DUP_MSK)
 105                 r->flags |= IEEE80211_TX_RC_DUP_DATA;
 106         if (rate_n_flags & RATE_MCS_SGI_MSK)
 107                 r->flags |= IEEE80211_TX_RC_SHORT_GI;
 108         rate_index = iwl_hwrate_to_plcp_idx(rate_n_flags);
 109         if (info->band == IEEE80211_BAND_5GHZ)
 110                 rate_index -= IWL_FIRST_OFDM_RATE;
 111         r->idx = rate_index;
 112 }
 113 EXPORT_SYMBOL(iwl_hwrate_to_tx_control);
 114
 115 int iwl_hwrate_to_plcp_idx(u32 rate_n_flags)
 116 {
 117         int idx = 0;
 118
 119         /* HT rate format */
 120         if (rate_n_flags & RATE_MCS_HT_MSK) {
 121                 idx = (rate_n_flags & 0xff);
 122
 123                 if (idx >= IWL_RATE_MIMO3_6M_PLCP)
 124                         idx = idx - IWL_RATE_MIMO3_6M_PLCP;
 125                 else if (idx >= IWL_RATE_MIMO2_6M_PLCP)
 126                         idx = idx - IWL_RATE_MIMO2_6M_PLCP;
 127
 128                 idx += IWL_FIRST_OFDM_RATE;
 129                 /* skip 9M not supported in ht*/
 130                 if (idx >= IWL_RATE_9M_INDEX)
 131                         idx += 1;
 132                 if ((idx >= IWL_FIRST_OFDM_RATE) && (idx <= IWL_LAST_OFDM_RATE))
 133                         return idx;
 134
 135         /* legacy rate format, search for match in table */
 136         } else {
 137                 for (idx = 0; idx < ARRAY_SIZE(iwl_rates); idx++)
 138                         if (iwl_rates[idx].plcp == (rate_n_flags & 0xFF))
 139                                 return idx;
 140         }
 141
 142         return -1;
 143 }
 144 EXPORT_SYMBOL(iwl_hwrate_to_plcp_idx);
 145
 146 u8 iwl_toggle_tx_ant(struct iwl_priv *priv, u8 ant)
 147 {
 148         int i;
 149         u8 ind = ant;
 150         for (i = 0; i < RATE_ANT_NUM - 1; i++) {
 151                 ind = (ind + 1) < RATE_ANT_NUM ?  ind + 1 : 0;
 152                 if (priv->hw_params.valid_tx_ant & BIT(ind))
 153                         return ind;
 154         }
 155         return ant;
 156 }
 157
 158 const u8 iwl_bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
 159 EXPORT_SYMBOL(iwl_bcast_addr);
 160
 161
 162 /* This function both allocates and initializes hw and priv. */
 163 struct ieee80211_hw *iwl_alloc_all(struct iwl_cfg *cfg,
 164                 struct ieee80211_ops *hw_ops)
 165 {
 166         struct iwl_priv *priv;
 167
 168         /* mac80211 allocates memory for this device instance, including
 169          *   space for this driver's private structure */
 170         struct ieee80211_hw *hw =
 171                 ieee80211_alloc_hw(sizeof(struct iwl_priv), hw_ops);
 172         if (hw == NULL) {
 173                 printk(KERN_ERR "%s: Can not allocate network device\n",
 174                        cfg->name);
 175                 goto out;
 176         }
 177
 178         priv = hw->priv;
 179         priv->hw = hw;
 180
 181 out:
 182         return hw;
 183 }
 184 EXPORT_SYMBOL(iwl_alloc_all);
 185
 186 void iwl_hw_detect(struct iwl_priv *priv)
 187 {
 188         priv->hw_rev = _iwl_read32(priv, CSR_HW_REV);
 189         priv->hw_wa_rev = _iwl_read32(priv, CSR_HW_REV_WA_REG);
 190         pci_read_config_byte(priv->pci_dev, PCI_REVISION_ID, &priv->rev_id);
 191 }
 192 EXPORT_SYMBOL(iwl_hw_detect);
 193
 194 int iwl_hw_nic_init(struct iwl_priv *priv)
 195 {
 196         unsigned long flags;
 197         struct iwl_rx_queue *rxq = &priv->rxq;
 198         int ret;
 199
 200         /* nic_init */
 201         spin_lock_irqsave(&priv->lock, flags);
 202         priv->cfg->ops->lib->apm_ops.init(priv);
 203         iwl_write32(priv, CSR_INT_COALESCING, 512 / 32);
 204         spin_unlock_irqrestore(&priv->lock, flags);
 205
 206         ret = priv->cfg->ops->lib->apm_ops.set_pwr_src(priv, IWL_PWR_SRC_VMAIN);
 207
 208         priv->cfg->ops->lib->apm_ops.config(priv);
 209
 210         /* Allocate the RX queue, or reset if it is already allocated */
 211         if (!rxq->bd) {
 212                 ret = iwl_rx_queue_alloc(priv);
 213                 if (ret) {
 214                         IWL_ERR(priv, "Unable to initialize Rx queue\n");
 215                         return -ENOMEM;
 216                 }
 217         } else
 218                 iwl_rx_queue_reset(priv, rxq);
 219
 220         iwl_rx_replenish(priv);
 221
 222         iwl_rx_init(priv, rxq);
 223
 224         spin_lock_irqsave(&priv->lock, flags);
 225
 226         rxq->need_update = 1;
 227         iwl_rx_queue_update_write_ptr(priv, rxq);
 228
 229         spin_unlock_irqrestore(&priv->lock, flags);
 230
 231         /* Allocate and init all Tx and Command queues */
 232         ret = iwl_txq_ctx_reset(priv);
 233         if (ret)
 234                 return ret;
 235
 236         set_bit(STATUS_INIT, &priv->status);
 237
 238         return 0;
 239 }
 240 EXPORT_SYMBOL(iwl_hw_nic_init);
 241
 242 void iwl_reset_qos(struct iwl_priv *priv)
 243 {
 244         u16 cw_min = 15;
 245         u16 cw_max = 1023;
 246         u8 aifs = 2;
 247         bool is_legacy = false;
 248         unsigned long flags;
 249         int i;
 250
 251         spin_lock_irqsave(&priv->lock, flags);
 252         /* QoS always active in AP and ADHOC mode
 253          * In STA mode wait for association
 254          */
 255         if (priv->iw_mode == NL80211_IFTYPE_ADHOC ||
 256             priv->iw_mode == NL80211_IFTYPE_AP)
 257                 priv->qos_data.qos_active = 1;
 258         else
 259                 priv->qos_data.qos_active = 0;
 260
 261         /* check for legacy mode */
 262         if ((priv->iw_mode == NL80211_IFTYPE_ADHOC &&
 263             (priv->active_rate & IWL_OFDM_RATES_MASK) == 0) ||
 264             (priv->iw_mode == NL80211_IFTYPE_STATION &&
 265             (priv->staging_rxon.flags & RXON_FLG_SHORT_SLOT_MSK) == 0)) {
 266                 cw_min = 31;
 267                 is_legacy = 1;
 268         }
 269
 270         if (priv->qos_data.qos_active)
 271                 aifs = 3;
 272
 273         priv->qos_data.def_qos_parm.ac[0].cw_min = cpu_to_le16(cw_min);
 274         priv->qos_data.def_qos_parm.ac[0].cw_max = cpu_to_le16(cw_max);
 275         priv->qos_data.def_qos_parm.ac[0].aifsn = aifs;
 276         priv->qos_data.def_qos_parm.ac[0].edca_txop = 0;
 277         priv->qos_data.def_qos_parm.ac[0].reserved1 = 0;
 278
 279         if (priv->qos_data.qos_active) {
 280                 i = 1;
 281                 priv->qos_data.def_qos_parm.ac[i].cw_min = cpu_to_le16(cw_min);
 282                 priv->qos_data.def_qos_parm.ac[i].cw_max = cpu_to_le16(cw_max);
 283                 priv->qos_data.def_qos_parm.ac[i].aifsn = 7;
 284                 priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
 285                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
 286
 287                 i = 2;
 288                 priv->qos_data.def_qos_parm.ac[i].cw_min =
 289                         cpu_to_le16((cw_min + 1) / 2 - 1);
 290                 priv->qos_data.def_qos_parm.ac[i].cw_max =
 291                         cpu_to_le16(cw_max);
 292                 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
 293                 if (is_legacy)
 294                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
 295                                 cpu_to_le16(6016);
 296                 else
 297                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
 298                                 cpu_to_le16(3008);
 299                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
 300
 301                 i = 3;
 302                 priv->qos_data.def_qos_parm.ac[i].cw_min =
 303                         cpu_to_le16((cw_min + 1) / 4 - 1);
 304                 priv->qos_data.def_qos_parm.ac[i].cw_max =
 305                         cpu_to_le16((cw_max + 1) / 2 - 1);
 306                 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
 307                 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
 308                 if (is_legacy)
 309                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
 310                                 cpu_to_le16(3264);
 311                 else
 312                         priv->qos_data.def_qos_parm.ac[i].edca_txop =
 313                                 cpu_to_le16(1504);
 314         } else {
 315                 for (i = 1; i < 4; i++) {
 316                         priv->qos_data.def_qos_parm.ac[i].cw_min =
 317                                 cpu_to_le16(cw_min);
 318                         priv->qos_data.def_qos_parm.ac[i].cw_max =
 319                                 cpu_to_le16(cw_max);
 320                         priv->qos_data.def_qos_parm.ac[i].aifsn = aifs;
 321                         priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
 322                         priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
 323                 }
 324         }
 325         IWL_DEBUG_QOS("set QoS to default \n");
 326
 327         spin_unlock_irqrestore(&priv->lock, flags);
 328 }
 329 EXPORT_SYMBOL(iwl_reset_qos);
 330
 331 #define MAX_BIT_RATE_40_MHZ 150 /* Mbps */
 332 #define MAX_BIT_RATE_20_MHZ 72 /* Mbps */
 333 static void iwlcore_init_ht_hw_capab(const struct iwl_priv *priv,
 334                               struct ieee80211_sta_ht_cap *ht_info,
 335                               enum ieee80211_band band)
 336 {
 337         u16 max_bit_rate = 0;
 338         u8 rx_chains_num = priv->hw_params.rx_chains_num;
 339         u8 tx_chains_num = priv->hw_params.tx_chains_num;
 340
 341         ht_info->cap = 0;
 342         memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));
 343
 344         ht_info->ht_supported = true;
 345
 346         ht_info->cap |= IEEE80211_HT_CAP_GRN_FLD;
 347         ht_info->cap |= IEEE80211_HT_CAP_SGI_20;
 348         ht_info->cap |= (IEEE80211_HT_CAP_SM_PS &
 349                              (WLAN_HT_CAP_SM_PS_DISABLED << 2));
 350
 351         max_bit_rate = MAX_BIT_RATE_20_MHZ;
 352         if (priv->hw_params.fat_channel & BIT(band)) {
 353                 ht_info->cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
 354                 ht_info->cap |= IEEE80211_HT_CAP_SGI_40;
 355                 ht_info->mcs.rx_mask[4] = 0x01;
 356                 max_bit_rate = MAX_BIT_RATE_40_MHZ;
 357         }
 358
 359         if (priv->cfg->mod_params->amsdu_size_8K)
 360                 ht_info->cap |= IEEE80211_HT_CAP_MAX_AMSDU;
 361
 362         ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
 363         ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;
 364
 365         ht_info->mcs.rx_mask[0] = 0xFF;
 366         if (rx_chains_num >= 2)
 367                 ht_info->mcs.rx_mask[1] = 0xFF;
 368         if (rx_chains_num >= 3)
 369                 ht_info->mcs.rx_mask[2] = 0xFF;
 370
 371         /* Highest supported Rx data rate */
 372         max_bit_rate *= rx_chains_num;
 373         WARN_ON(max_bit_rate & ~IEEE80211_HT_MCS_RX_HIGHEST_MASK);
 374         ht_info->mcs.rx_highest = cpu_to_le16(max_bit_rate);
 375
 376         /* Tx MCS capabilities */
 377         ht_info->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
 378         if (tx_chains_num != rx_chains_num) {
 379                 ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
 380                 ht_info->mcs.tx_params |= ((tx_chains_num - 1) <<
 381                                 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT);
 382         }
 383 }
 384
 385 static void iwlcore_init_hw_rates(struct iwl_priv *priv,
 386                               struct ieee80211_rate *rates)
 387 {
 388         int i;
 389
 390         for (i = 0; i < IWL_RATE_COUNT; i++) {
 391                 rates[i].bitrate = iwl_rates[i].ieee * 5;
 392                 rates[i].hw_value = i; /* Rate scaling will work on indexes */
 393                 rates[i].hw_value_short = i;
 394                 rates[i].flags = 0;
 395                 if ((i > IWL_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
 396                         /*
 397                          * If CCK != 1M then set short preamble rate flag.
 398                          */
 399                         rates[i].flags |=
 400                                 (iwl_rates[i].plcp == IWL_RATE_1M_PLCP) ?
 401                                         0 : IEEE80211_RATE_SHORT_PREAMBLE;
 402                 }
 403         }
 404 }
 405
 406 /**
 407  * iwlcore_init_geos - Initialize mac80211's geo/channel info based from eeprom
 408  */
 409 static int iwlcore_init_geos(struct iwl_priv *priv)
 410 {
 411         struct iwl_channel_info *ch;
 412         struct ieee80211_supported_band *sband;
 413         struct ieee80211_channel *channels;
 414         struct ieee80211_channel *geo_ch;
 415         struct ieee80211_rate *rates;
 416         int i = 0;
 417
 418         if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
 419             priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
 420                 IWL_DEBUG_INFO("Geography modes already initialized.\n");
 421                 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
 422                 return 0;
 423         }
 424
 425         channels = kzalloc(sizeof(struct ieee80211_channel) *
 426                            priv->channel_count, GFP_KERNEL);
 427         if (!channels)
 428                 return -ENOMEM;
 429
 430         rates = kzalloc((sizeof(struct ieee80211_rate) * (IWL_RATE_COUNT + 1)),
 431                         GFP_KERNEL);
 432         if (!rates) {
 433                 kfree(channels);
 434                 return -ENOMEM;
 435         }
 436
 437         /* 5.2GHz channels start after the 2.4GHz channels */
 438         sband = &priv->bands[IEEE80211_BAND_5GHZ];
 439         sband->channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)];
 440         /* just OFDM */
 441         sband->bitrates = &rates[IWL_FIRST_OFDM_RATE];
 442         sband->n_bitrates = IWL_RATE_COUNT - IWL_FIRST_OFDM_RATE;
 443
 444         if (priv->cfg->sku & IWL_SKU_N)
 445                 iwlcore_init_ht_hw_capab(priv, &sband->ht_cap,
 446                                          IEEE80211_BAND_5GHZ);
 447
 448         sband = &priv->bands[IEEE80211_BAND_2GHZ];
 449         sband->channels = channels;
 450         /* OFDM & CCK */
 451         sband->bitrates = rates;
 452         sband->n_bitrates = IWL_RATE_COUNT;
 453
 454         if (priv->cfg->sku & IWL_SKU_N)
 455                 iwlcore_init_ht_hw_capab(priv, &sband->ht_cap,
 456                                          IEEE80211_BAND_2GHZ);
 457
 458         priv->ieee_channels = channels;
 459         priv->ieee_rates = rates;
 460
 461         iwlcore_init_hw_rates(priv, rates);
 462
 463         for (i = 0;  i < priv->channel_count; i++) {
 464                 ch = &priv->channel_info[i];
 465
 466                 /* FIXME: might be removed if scan is OK */
 467                 if (!is_channel_valid(ch))
 468                         continue;
 469
 470                 if (is_channel_a_band(ch))
 471                         sband =  &priv->bands[IEEE80211_BAND_5GHZ];
 472                 else
 473                         sband =  &priv->bands[IEEE80211_BAND_2GHZ];
 474
 475                 geo_ch = &sband->channels[sband->n_channels++];
 476
 477                 geo_ch->center_freq =
 478                                 ieee80211_channel_to_frequency(ch->channel);
 479                 geo_ch->max_power = ch->max_power_avg;
 480                 geo_ch->max_antenna_gain = 0xff;
 481                 geo_ch->hw_value = ch->channel;
 482
 483                 if (is_channel_valid(ch)) {
 484                         if (!(ch->flags & EEPROM_CHANNEL_IBSS))
 485                                 geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
 486
 487                         if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
 488                                 geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
 489
 490                         if (ch->flags & EEPROM_CHANNEL_RADAR)
 491                                 geo_ch->flags |= IEEE80211_CHAN_RADAR;
 492
 493                         geo_ch->flags |= ch->fat_extension_channel;
 494
 495                         if (ch->max_power_avg > priv->tx_power_channel_lmt)
 496                                 priv->tx_power_channel_lmt = ch->max_power_avg;
 497                 } else {
 498                         geo_ch->flags |= IEEE80211_CHAN_DISABLED;
 499                 }
 500
 501                 /* Save flags for reg domain usage */
 502                 geo_ch->orig_flags = geo_ch->flags;
 503
 504                 IWL_DEBUG_INFO("Channel %d Freq=%d[%sGHz] %s flag=0x%X\n",
 505                                 ch->channel, geo_ch->center_freq,
 506                                 is_channel_a_band(ch) ?  "5.2" : "2.4",
 507                                 geo_ch->flags & IEEE80211_CHAN_DISABLED ?
 508                                 "restricted" : "valid",
 509                                  geo_ch->flags);
 510         }
 511
 512         if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) &&
 513              priv->cfg->sku & IWL_SKU_A) {
 514                 IWL_INFO(priv, "Incorrectly detected BG card as ABG. "
 515                         "Please send your PCI ID 0x%04X:0x%04X to maintainer.\n",
 516                            priv->pci_dev->device,
 517                            priv->pci_dev->subsystem_device);
 518                 priv->cfg->sku &= ~IWL_SKU_A;
 519         }
 520
 521         IWL_INFO(priv, "Tunable channels: %d 802.11bg, %d 802.11a channels\n",
 522                    priv->bands[IEEE80211_BAND_2GHZ].n_channels,
 523                    priv->bands[IEEE80211_BAND_5GHZ].n_channels);
 524
 525         set_bit(STATUS_GEO_CONFIGURED, &priv->status);
 526
 527         return 0;
 528 }
 529
 530 /*
 531  * iwlcore_free_geos - undo allocations in iwlcore_init_geos
 532  */
 533 static void iwlcore_free_geos(struct iwl_priv *priv)
 534 {
 535         kfree(priv->ieee_channels);
 536         kfree(priv->ieee_rates);
 537         clear_bit(STATUS_GEO_CONFIGURED, &priv->status);
 538 }
 539
 540 static bool is_single_rx_stream(struct iwl_priv *priv)
 541 {
 542         return !priv->current_ht_config.is_ht ||
 543                ((priv->current_ht_config.mcs.rx_mask[1] == 0) &&
 544                 (priv->current_ht_config.mcs.rx_mask[2] == 0));
 545 }
 546
 547 static u8 iwl_is_channel_extension(struct iwl_priv *priv,
 548                                    enum ieee80211_band band,
 549                                    u16 channel, u8 extension_chan_offset)
 550 {
 551         const struct iwl_channel_info *ch_info;
 552
 553         ch_info = iwl_get_channel_info(priv, band, channel);
 554         if (!is_channel_valid(ch_info))
 555                 return 0;
 556
 557         if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE)
 558                 return !(ch_info->fat_extension_channel &
 559                                         IEEE80211_CHAN_NO_FAT_ABOVE);
 560         else if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW)
 561                 return !(ch_info->fat_extension_channel &
 562                                         IEEE80211_CHAN_NO_FAT_BELOW);
 563
 564         return 0;
 565 }
 566
 567 u8 iwl_is_fat_tx_allowed(struct iwl_priv *priv,
 568                          struct ieee80211_sta_ht_cap *sta_ht_inf)
 569 {
 570         struct iwl_ht_info *iwl_ht_conf = &priv->current_ht_config;
 571
 572         if ((!iwl_ht_conf->is_ht) ||
 573            (iwl_ht_conf->supported_chan_width != IWL_CHANNEL_WIDTH_40MHZ) ||
 574            (iwl_ht_conf->extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_NONE))
 575                 return 0;
 576
 577         if (sta_ht_inf) {
 578                 if ((!sta_ht_inf->ht_supported) ||
 579                    (!(sta_ht_inf->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40)))
 580                         return 0;
 581         }
 582
 583         return iwl_is_channel_extension(priv, priv->band,
 584                                         le16_to_cpu(priv->staging_rxon.channel),
 585                                         iwl_ht_conf->extension_chan_offset);
 586 }
 587 EXPORT_SYMBOL(iwl_is_fat_tx_allowed);
 588
 589 void iwl_set_rxon_ht(struct iwl_priv *priv, struct iwl_ht_info *ht_info)
 590 {
 591         struct iwl_rxon_cmd *rxon = &priv->staging_rxon;
 592         u32 val;
 593
 594         if (!ht_info->is_ht) {
 595                 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED_MSK |
 596                         RXON_FLG_CHANNEL_MODE_PURE_40_MSK |
 597                         RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK |
 598                         RXON_FLG_FAT_PROT_MSK |
 599                         RXON_FLG_HT_PROT_MSK);
 600                 return;
 601         }
 602
 603         /* Set up channel bandwidth:  20 MHz only, or 20/40 mixed if fat ok */
 604         if (iwl_is_fat_tx_allowed(priv, NULL))
 605                 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED_MSK;
 606         else
 607                 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED_MSK |
 608                                  RXON_FLG_CHANNEL_MODE_PURE_40_MSK);
 609
 610         /* Note: control channel is opposite of extension channel */
 611         switch (ht_info->extension_chan_offset) {
 612         case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
 613                 rxon->flags &= ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
 614                 break;
 615         case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
 616                 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
 617                 break;
 618         case IEEE80211_HT_PARAM_CHA_SEC_NONE:
 619         default:
 620                 rxon->flags &= ~RXON_FLG_CHANNEL_MODE_MIXED_MSK;
 621                 break;
 622         }
 623
 624         val = ht_info->ht_protection;
 625
 626         rxon->flags |= cpu_to_le32(val << RXON_FLG_HT_OPERATING_MODE_POS);
 627
 628         iwl_set_rxon_chain(priv);
 629
 630         IWL_DEBUG_ASSOC("supported HT rate 0x%X 0x%X 0x%X "
 631                         "rxon flags 0x%X operation mode :0x%X "
 632                         "extension channel offset 0x%x\n",
 633                         ht_info->mcs.rx_mask[0],
 634                         ht_info->mcs.rx_mask[1],
 635                         ht_info->mcs.rx_mask[2],
 636                         le32_to_cpu(rxon->flags), ht_info->ht_protection,
 637                         ht_info->extension_chan_offset);
 638         return;
 639 }
 640 EXPORT_SYMBOL(iwl_set_rxon_ht);
 641
 642 #define IWL_NUM_RX_CHAINS_MULTIPLE      3
 643 #define IWL_NUM_RX_CHAINS_SINGLE        2
 644 #define IWL_NUM_IDLE_CHAINS_DUAL        2
 645 #define IWL_NUM_IDLE_CHAINS_SINGLE      1
 646
 647 /* Determine how many receiver/antenna chains to use.
 648  * More provides better reception via diversity.  Fewer saves power.
 649  * MIMO (dual stream) requires at least 2, but works better with 3.
 650  * This does not determine *which* chains to use, just how many.
 651  */
 652 static int iwl_get_active_rx_chain_count(struct iwl_priv *priv)
 653 {
 654         bool is_single = is_single_rx_stream(priv);
 655         bool is_cam = !test_bit(STATUS_POWER_PMI, &priv->status);
 656
 657         /* # of Rx chains to use when expecting MIMO. */
 658         if (is_single || (!is_cam && (priv->current_ht_config.sm_ps ==
 659                                                  WLAN_HT_CAP_SM_PS_STATIC)))
 660                 return IWL_NUM_RX_CHAINS_SINGLE;
 661         else
 662                 return IWL_NUM_RX_CHAINS_MULTIPLE;
 663 }
 664
 665 static int iwl_get_idle_rx_chain_count(struct iwl_priv *priv, int active_cnt)
 666 {
 667         int idle_cnt;
 668         bool is_cam = !test_bit(STATUS_POWER_PMI, &priv->status);
 669         /* # Rx chains when idling and maybe trying to save power */
 670         switch (priv->current_ht_config.sm_ps) {
 671         case WLAN_HT_CAP_SM_PS_STATIC:
 672         case WLAN_HT_CAP_SM_PS_DYNAMIC:
 673                 idle_cnt = (is_cam) ? IWL_NUM_IDLE_CHAINS_DUAL :
 674                                         IWL_NUM_IDLE_CHAINS_SINGLE;
 675                 break;
 676         case WLAN_HT_CAP_SM_PS_DISABLED:
 677                 idle_cnt = (is_cam) ? active_cnt : IWL_NUM_IDLE_CHAINS_SINGLE;
 678                 break;
 679         case WLAN_HT_CAP_SM_PS_INVALID:
 680         default:
 681                 IWL_ERR(priv, "invalid mimo ps mode %d\n",
 682                            priv->current_ht_config.sm_ps);
 683                 WARN_ON(1);
 684                 idle_cnt = -1;
 685                 break;
 686         }
 687         return idle_cnt;
 688 }
 689
 690 /* up to 4 chains */
 691 static u8 iwl_count_chain_bitmap(u32 chain_bitmap)
 692 {
 693         u8 res;
 694         res = (chain_bitmap & BIT(0)) >> 0;
 695         res += (chain_bitmap & BIT(1)) >> 1;
 696         res += (chain_bitmap & BIT(2)) >> 2;
 697         res += (chain_bitmap & BIT(4)) >> 4;
 698         return res;
 699 }
 700
 701 /**
 702  * iwl_is_monitor_mode - Determine if interface in monitor mode
 703  *
 704  * priv->iw_mode is set in add_interface, but add_interface is
 705  * never called for monitor mode. The only way mac80211 informs us about
 706  * monitor mode is through configuring filters (call to configure_filter).
 707  */
 708 static bool iwl_is_monitor_mode(struct iwl_priv *priv)
 709 {
 710         return !!(priv->staging_rxon.filter_flags & RXON_FILTER_PROMISC_MSK);
 711 }
 712
 713 /**
 714  * iwl_set_rxon_chain - Set up Rx chain usage in "staging" RXON image
 715  *
 716  * Selects how many and which Rx receivers/antennas/chains to use.
 717  * This should not be used for scan command ... it puts data in wrong place.
 718  */
 719 void iwl_set_rxon_chain(struct iwl_priv *priv)
 720 {
 721         bool is_single = is_single_rx_stream(priv);
 722         bool is_cam = !test_bit(STATUS_POWER_PMI, &priv->status);
 723         u8 idle_rx_cnt, active_rx_cnt, valid_rx_cnt;
 724         u32 active_chains;
 725         u16 rx_chain;
 726
 727         /* Tell uCode which antennas are actually connected.
 728          * Before first association, we assume all antennas are connected.
 729          * Just after first association, iwl_chain_noise_calibration()
 730          *    checks which antennas actually *are* connected. */
 731          if (priv->chain_noise_data.active_chains)
 732                 active_chains = priv->chain_noise_data.active_chains;
 733         else
 734                 active_chains = priv->hw_params.valid_rx_ant;
 735
 736         rx_chain = active_chains << RXON_RX_CHAIN_VALID_POS;
 737
 738         /* How many receivers should we use? */
 739         active_rx_cnt = iwl_get_active_rx_chain_count(priv);
 740         idle_rx_cnt = iwl_get_idle_rx_chain_count(priv, active_rx_cnt);
 741
 742
 743         /* correct rx chain count according hw settings
 744          * and chain noise calibration
 745          */
 746         valid_rx_cnt = iwl_count_chain_bitmap(active_chains);
 747         if (valid_rx_cnt < active_rx_cnt)
 748                 active_rx_cnt = valid_rx_cnt;
 749
 750         if (valid_rx_cnt < idle_rx_cnt)
 751                 idle_rx_cnt = valid_rx_cnt;
 752
 753         rx_chain |= active_rx_cnt << RXON_RX_CHAIN_MIMO_CNT_POS;
 754         rx_chain |= idle_rx_cnt  << RXON_RX_CHAIN_CNT_POS;
 755
 756         /* copied from 'iwl_bg_request_scan()' */
 757         /* Force use of chains B and C (0x6) for Rx for 4965
 758          * Avoid A (0x1) because of its off-channel reception on A-band.
 759          * MIMO is not used here, but value is required */
 760         if (iwl_is_monitor_mode(priv) &&
 761             !(priv->staging_rxon.flags & RXON_FLG_BAND_24G_MSK) &&
 762             ((priv->hw_rev & CSR_HW_REV_TYPE_MSK) == CSR_HW_REV_TYPE_4965)) {
 763                 rx_chain = 0x07 << RXON_RX_CHAIN_VALID_POS;
 764                 rx_chain |= 0x06 << RXON_RX_CHAIN_FORCE_SEL_POS;
 765                 rx_chain |= 0x07 << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS;
 766                 rx_chain |= 0x01 << RXON_RX_CHAIN_DRIVER_FORCE_POS;
 767         }
 768
 769         priv->staging_rxon.rx_chain = cpu_to_le16(rx_chain);
 770
 771         if (!is_single && (active_rx_cnt >= IWL_NUM_RX_CHAINS_SINGLE) && is_cam)
 772                 priv->staging_rxon.rx_chain |= RXON_RX_CHAIN_MIMO_FORCE_MSK;
 773         else
 774                 priv->staging_rxon.rx_chain &= ~RXON_RX_CHAIN_MIMO_FORCE_MSK;
 775
 776         IWL_DEBUG_ASSOC("rx_chain=0x%X active=%d idle=%d\n",
 777                         priv->staging_rxon.rx_chain,
 778                         active_rx_cnt, idle_rx_cnt);
 779
 780         WARN_ON(active_rx_cnt == 0 || idle_rx_cnt == 0 ||
 781                 active_rx_cnt < idle_rx_cnt);
 782 }
 783 EXPORT_SYMBOL(iwl_set_rxon_chain);
 784
 785 /**
 786  * iwl_set_rxon_channel - Set the phymode and channel values in staging RXON
 787  * @phymode: MODE_IEEE80211A sets to 5.2GHz; all else set to 2.4GHz
 788  * @channel: Any channel valid for the requested phymode
 789
 790  * In addition to setting the staging RXON, priv->phymode is also set.
 791  *
 792  * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
 793  * in the staging RXON flag structure based on the phymode
 794  */
 795 int iwl_set_rxon_channel(struct iwl_priv *priv, struct ieee80211_channel *ch)
 796 {
 797         enum ieee80211_band band = ch->band;
 798         u16 channel = ieee80211_frequency_to_channel(ch->center_freq);
 799
 800         if (!iwl_get_channel_info(priv, band, channel)) {
 801                 IWL_DEBUG_INFO("Could not set channel to %d [%d]\n",
 802                                channel, band);
 803                 return -EINVAL;
 804         }
 805
 806         if ((le16_to_cpu(priv->staging_rxon.channel) == channel) &&
 807             (priv->band == band))
 808                 return 0;
 809
 810         priv->staging_rxon.channel = cpu_to_le16(channel);
 811         if (band == IEEE80211_BAND_5GHZ)
 812                 priv->staging_rxon.flags &= ~RXON_FLG_BAND_24G_MSK;
 813         else
 814                 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
 815
 816         priv->band = band;
 817
 818         IWL_DEBUG_INFO("Staging channel set to %d [%d]\n", channel, band);
 819
 820         return 0;
 821 }
 822 EXPORT_SYMBOL(iwl_set_rxon_channel);
 823
 824 int iwl_setup_mac(struct iwl_priv *priv)
 825 {
 826         int ret;
 827         struct ieee80211_hw *hw = priv->hw;
 828         hw->rate_control_algorithm = "iwl-agn-rs";
 829
 830         /* Tell mac80211 our characteristics */
 831         hw->flags = IEEE80211_HW_SIGNAL_DBM |
 832                     IEEE80211_HW_NOISE_DBM |
 833                     IEEE80211_HW_AMPDU_AGGREGATION |
 834                     IEEE80211_HW_SUPPORTS_PS;
 835         hw->wiphy->interface_modes =
 836                 BIT(NL80211_IFTYPE_STATION) |
 837                 BIT(NL80211_IFTYPE_ADHOC);
 838
 839         hw->wiphy->custom_regulatory = true;
 840
 841         /* Default value; 4 EDCA QOS priorities */
 842         hw->queues = 4;
 843         /* queues to support 11n aggregation */
 844         if (priv->cfg->sku & IWL_SKU_N)
 845                 hw->ampdu_queues = priv->cfg->mod_params->num_of_ampdu_queues;
 846
 847         hw->conf.beacon_int = 100;
 848         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
 849
 850         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
 851                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
 852                         &priv->bands[IEEE80211_BAND_2GHZ];
 853         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
 854                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
 855                         &priv->bands[IEEE80211_BAND_5GHZ];
 856
 857         ret = ieee80211_register_hw(priv->hw);
 858         if (ret) {
 859                 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
 860                 return ret;
 861         }
 862         priv->mac80211_registered = 1;
 863
 864         return 0;
 865 }
 866 EXPORT_SYMBOL(iwl_setup_mac);
 867
 868 int iwl_set_hw_params(struct iwl_priv *priv)
 869 {
 870         priv->hw_params.sw_crypto = priv->cfg->mod_params->sw_crypto;
 871         priv->hw_params.max_rxq_size = RX_QUEUE_SIZE;
 872         priv->hw_params.max_rxq_log = RX_QUEUE_SIZE_LOG;
 873         if (priv->cfg->mod_params->amsdu_size_8K)
 874                 priv->hw_params.rx_buf_size = IWL_RX_BUF_SIZE_8K;
 875         else
 876                 priv->hw_params.rx_buf_size = IWL_RX_BUF_SIZE_4K;
 877         priv->hw_params.max_pkt_size = priv->hw_params.rx_buf_size - 256;
 878
 879         if (priv->cfg->mod_params->disable_11n)
 880                 priv->cfg->sku &= ~IWL_SKU_N;
 881
 882         /* Device-specific setup */
 883         return priv->cfg->ops->lib->set_hw_params(priv);
 884 }
 885 EXPORT_SYMBOL(iwl_set_hw_params);
 886
 887 int iwl_init_drv(struct iwl_priv *priv)
 888 {
 889         int ret;
 890
 891         priv->ibss_beacon = NULL;
 892
 893         spin_lock_init(&priv->lock);
 894         spin_lock_init(&priv->power_data.lock);
 895         spin_lock_init(&priv->sta_lock);
 896         spin_lock_init(&priv->hcmd_lock);
 897
 898         INIT_LIST_HEAD(&priv->free_frames);
 899
 900         mutex_init(&priv->mutex);
 901
 902         /* Clear the driver's (not device's) station table */
 903         iwl_clear_stations_table(priv);
 904
 905         priv->data_retry_limit = -1;
 906         priv->ieee_channels = NULL;
 907         priv->ieee_rates = NULL;
 908         priv->band = IEEE80211_BAND_2GHZ;
 909
 910         priv->iw_mode = NL80211_IFTYPE_STATION;
 911
 912         priv->current_ht_config.sm_ps = WLAN_HT_CAP_SM_PS_DISABLED;
 913
 914         /* Choose which receivers/antennas to use */
 915         iwl_set_rxon_chain(priv);
 916         iwl_init_scan_params(priv);
 917
 918         iwl_reset_qos(priv);
 919
 920         priv->qos_data.qos_active = 0;
 921         priv->qos_data.qos_cap.val = 0;
 922
 923         priv->rates_mask = IWL_RATES_MASK;
 924         /* If power management is turned on, default to AC mode */
 925         priv->power_mode = IWL_POWER_AC;
 926         priv->tx_power_user_lmt = IWL_TX_POWER_TARGET_POWER_MAX;
 927
 928         ret = iwl_init_channel_map(priv);
 929         if (ret) {
 930                 IWL_ERR(priv, "initializing regulatory failed: %d\n", ret);
 931                 goto err;
 932         }
 933
 934         ret = iwlcore_init_geos(priv);
 935         if (ret) {
 936                 IWL_ERR(priv, "initializing geos failed: %d\n", ret);
 937                 goto err_free_channel_map;
 938         }
 939
 940         return 0;
 941
 942 err_free_channel_map:
 943         iwl_free_channel_map(priv);
 944 err:
 945         return ret;
 946 }
 947 EXPORT_SYMBOL(iwl_init_drv);
 948
 949 int iwl_set_tx_power(struct iwl_priv *priv, s8 tx_power, bool force)
 950 {
 951         int ret = 0;
 952         if (tx_power < IWL_TX_POWER_TARGET_POWER_MIN) {
 953                 IWL_WARN(priv, "Requested user TXPOWER %d below limit.\n",
 954                             priv->tx_power_user_lmt);
 955                 return -EINVAL;
 956         }
 957
 958         if (tx_power > IWL_TX_POWER_TARGET_POWER_MAX) {
 959                 IWL_WARN(priv, "Requested user TXPOWER %d above limit.\n",
 960                             priv->tx_power_user_lmt);
 961                 return -EINVAL;
 962         }
 963
 964         if (priv->tx_power_user_lmt != tx_power)
 965                 force = true;
 966
 967         priv->tx_power_user_lmt = tx_power;
 968
 969         if (force && priv->cfg->ops->lib->send_tx_power)
 970                 ret = priv->cfg->ops->lib->send_tx_power(priv);
 971
 972         return ret;
 973 }
 974 EXPORT_SYMBOL(iwl_set_tx_power);
 975
 976 void iwl_uninit_drv(struct iwl_priv *priv)
 977 {
 978         iwl_calib_free_results(priv);
 979         iwlcore_free_geos(priv);
 980         iwl_free_channel_map(priv);
 981         kfree(priv->scan);
 982 }
 983 EXPORT_SYMBOL(iwl_uninit_drv);
 984
 985
 986 void iwl_disable_interrupts(struct iwl_priv *priv)
 987 {
 988         clear_bit(STATUS_INT_ENABLED, &priv->status);
 989
 990         /* disable interrupts from uCode/NIC to host */
 991         iwl_write32(priv, CSR_INT_MASK, 0x00000000);
 992
 993         /* acknowledge/clear/reset any interrupts still pending
 994          * from uCode or flow handler (Rx/Tx DMA) */
 995         iwl_write32(priv, CSR_INT, 0xffffffff);
 996         iwl_write32(priv, CSR_FH_INT_STATUS, 0xffffffff);
 997         IWL_DEBUG_ISR("Disabled interrupts\n");
 998 }
 999 EXPORT_SYMBOL(iwl_disable_interrupts);
1000
1001 void iwl_enable_interrupts(struct iwl_priv *priv)
1002 {
1003         IWL_DEBUG_ISR("Enabling interrupts\n");
1004         set_bit(STATUS_INT_ENABLED, &priv->status);
1005         iwl_write32(priv, CSR_INT_MASK, CSR_INI_SET_MASK);
1006 }
1007 EXPORT_SYMBOL(iwl_enable_interrupts);
1008
1009 int iwl_send_statistics_request(struct iwl_priv *priv, u8 flags)
1010 {
1011         u32 stat_flags = 0;
1012         struct iwl_host_cmd cmd = {
1013                 .id = REPLY_STATISTICS_CMD,
1014                 .meta.flags = flags,
1015                 .len = sizeof(stat_flags),
1016                 .data = (u8 *) &stat_flags,
1017         };
1018         return iwl_send_cmd(priv, &cmd);
1019 }
1020 EXPORT_SYMBOL(iwl_send_statistics_request);
1021
1022 /**
1023  * iwl_verify_inst_sparse - verify runtime uCode image in card vs. host,
1024  *   using sample data 100 bytes apart.  If these sample points are good,
1025  *   it's a pretty good bet that everything between them is good, too.
1026  */
1027 static int iwlcore_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
1028 {
1029         u32 val;
1030         int ret = 0;
1031         u32 errcnt = 0;
1032         u32 i;
1033
1034         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
1035
1036         ret = iwl_grab_nic_access(priv);
1037         if (ret)
1038                 return ret;
1039
1040         for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
1041                 /* read data comes through single port, auto-incr addr */
1042                 /* NOTE: Use the debugless read so we don't flood kernel log
1043                  * if IWL_DL_IO is set */
1044                 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
1045                         i + IWL49_RTC_INST_LOWER_BOUND);
1046                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1047                 if (val != le32_to_cpu(*image)) {
1048                         ret = -EIO;
1049                         errcnt++;
1050                         if (errcnt >= 3)
1051                                 break;
1052                 }
1053         }
1054
1055         iwl_release_nic_access(priv);
1056
1057         return ret;
1058 }
1059
1060 /**
1061  * iwlcore_verify_inst_full - verify runtime uCode image in card vs. host,
1062  *     looking at all data.
1063  */
1064 static int iwl_verify_inst_full(struct iwl_priv *priv, __le32 *image,
1065                                  u32 len)
1066 {
1067         u32 val;
1068         u32 save_len = len;
1069         int ret = 0;
1070         u32 errcnt;
1071
1072         IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
1073
1074         ret = iwl_grab_nic_access(priv);
1075         if (ret)
1076                 return ret;
1077
1078         iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
1079                            IWL49_RTC_INST_LOWER_BOUND);
1080
1081         errcnt = 0;
1082         for (; len > 0; len -= sizeof(u32), image++) {
1083                 /* read data comes through single port, auto-incr addr */
1084                 /* NOTE: Use the debugless read so we don't flood kernel log
1085                  * if IWL_DL_IO is set */
1086                 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
1087                 if (val != le32_to_cpu(*image)) {
1088                         IWL_ERR(priv, "uCode INST section is invalid at "
1089                                   "offset 0x%x, is 0x%x, s/b 0x%x\n",
1090                                   save_len - len, val, le32_to_cpu(*image));
1091                         ret = -EIO;
1092                         errcnt++;
1093                         if (errcnt >= 20)
1094                                 break;
1095                 }
1096         }
1097
1098         iwl_release_nic_access(priv);
1099
1100         if (!errcnt)
1101                 IWL_DEBUG_INFO
1102                     ("ucode image in INSTRUCTION memory is good\n");
1103
1104         return ret;
1105 }
1106
1107 /**
1108  * iwl_verify_ucode - determine which instruction image is in SRAM,
1109  *    and verify its contents
1110  */
1111 int iwl_verify_ucode(struct iwl_priv *priv)
1112 {
1113         __le32 *image;
1114         u32 len;
1115         int ret;
1116
1117         /* Try bootstrap */
1118         image = (__le32 *)priv->ucode_boot.v_addr;
1119         len = priv->ucode_boot.len;
1120         ret = iwlcore_verify_inst_sparse(priv, image, len);
1121         if (!ret) {
1122                 IWL_DEBUG_INFO("Bootstrap uCode is good in inst SRAM\n");
1123                 return 0;
1124         }
1125
1126         /* Try initialize */
1127         image = (__le32 *)priv->ucode_init.v_addr;
1128         len = priv->ucode_init.len;
1129         ret = iwlcore_verify_inst_sparse(priv, image, len);
1130         if (!ret) {
1131                 IWL_DEBUG_INFO("Initialize uCode is good in inst SRAM\n");
1132                 return 0;
1133         }
1134
1135         /* Try runtime/protocol */
1136         image = (__le32 *)priv->ucode_code.v_addr;
1137         len = priv->ucode_code.len;
1138         ret = iwlcore_verify_inst_sparse(priv, image, len);
1139         if (!ret) {
1140                 IWL_DEBUG_INFO("Runtime uCode is good in inst SRAM\n");
1141                 return 0;
1142         }
1143
1144         IWL_ERR(priv, "NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
1145
1146         /* Since nothing seems to match, show first several data entries in
1147          * instruction SRAM, so maybe visual inspection will give a clue.
1148          * Selection of bootstrap image (vs. other images) is arbitrary. */
1149         image = (__le32 *)priv->ucode_boot.v_addr;
1150         len = priv->ucode_boot.len;
1151         ret = iwl_verify_inst_full(priv, image, len);
1152
1153         return ret;
1154 }
1155 EXPORT_SYMBOL(iwl_verify_ucode);
1156
1157
1158 static const char *desc_lookup_text[] = {
1159         "OK",
1160         "FAIL",
1161         "BAD_PARAM",
1162         "BAD_CHECKSUM",
1163         "NMI_INTERRUPT_WDG",
1164         "SYSASSERT",
1165         "FATAL_ERROR",
1166         "BAD_COMMAND",
1167         "HW_ERROR_TUNE_LOCK",
1168         "HW_ERROR_TEMPERATURE",
1169         "ILLEGAL_CHAN_FREQ",
1170         "VCC_NOT_STABLE",
1171         "FH_ERROR",
1172         "NMI_INTERRUPT_HOST",
1173         "NMI_INTERRUPT_ACTION_PT",
1174         "NMI_INTERRUPT_UNKNOWN",
1175         "UCODE_VERSION_MISMATCH",
1176         "HW_ERROR_ABS_LOCK",
1177         "HW_ERROR_CAL_LOCK_FAIL",
1178         "NMI_INTERRUPT_INST_ACTION_PT",
1179         "NMI_INTERRUPT_DATA_ACTION_PT",
1180         "NMI_TRM_HW_ER",
1181         "NMI_INTERRUPT_TRM",
1182         "NMI_INTERRUPT_BREAK_POINT"
1183         "DEBUG_0",
1184         "DEBUG_1",
1185         "DEBUG_2",
1186         "DEBUG_3",
1187         "UNKNOWN"
1188 };
1189
1190 static const char *desc_lookup(int i)
1191 {
1192         int max = ARRAY_SIZE(desc_lookup_text) - 1;
1193
1194         if (i < 0 || i > max)
1195                 i = max;
1196
1197         return desc_lookup_text[i];
1198 }
1199
1200 #define ERROR_START_OFFSET  (1 * sizeof(u32))
1201 #define ERROR_ELEM_SIZE     (7 * sizeof(u32))
1202
1203 void iwl_dump_nic_error_log(struct iwl_priv *priv)
1204 {
1205         u32 data2, line;
1206         u32 desc, time, count, base, data1;
1207         u32 blink1, blink2, ilink1, ilink2;
1208         int ret;
1209
1210         if (priv->ucode_type == UCODE_INIT)
1211                 base = le32_to_cpu(priv->card_alive_init.error_event_table_ptr);
1212         else
1213                 base = le32_to_cpu(priv->card_alive.error_event_table_ptr);
1214
1215         if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
1216                 IWL_ERR(priv, "Not valid error log pointer 0x%08X\n", base);
1217                 return;
1218         }
1219
1220         ret = iwl_grab_nic_access(priv);
1221         if (ret) {
1222                 IWL_WARN(priv, "Can not read from adapter at this time.\n");
1223                 return;
1224         }
1225
1226         count = iwl_read_targ_mem(priv, base);
1227
1228         if (ERROR_START_OFFSET <= count * ERROR_ELEM_SIZE) {
1229                 IWL_ERR(priv, "Start IWL Error Log Dump:\n");
1230                 IWL_ERR(priv, "Status: 0x%08lX, count: %d\n",
1231                         priv->status, count);
1232         }
1233
1234         desc = iwl_read_targ_mem(priv, base + 1 * sizeof(u32));
1235         blink1 = iwl_read_targ_mem(priv, base + 3 * sizeof(u32));
1236         blink2 = iwl_read_targ_mem(priv, base + 4 * sizeof(u32));
1237         ilink1 = iwl_read_targ_mem(priv, base + 5 * sizeof(u32));
1238         ilink2 = iwl_read_targ_mem(priv, base + 6 * sizeof(u32));
1239         data1 = iwl_read_targ_mem(priv, base + 7 * sizeof(u32));
1240         data2 = iwl_read_targ_mem(priv, base + 8 * sizeof(u32));
1241         line = iwl_read_targ_mem(priv, base + 9 * sizeof(u32));
1242         time = iwl_read_targ_mem(priv, base + 11 * sizeof(u32));
1243
1244         IWL_ERR(priv, "Desc                               Time       "
1245                 "data1      data2      line\n");
1246         IWL_ERR(priv, "%-28s (#%02d) %010u 0x%08X 0x%08X %u\n",
1247                 desc_lookup(desc), desc, time, data1, data2, line);
1248         IWL_ERR(priv, "blink1  blink2  ilink1  ilink2\n");
1249         IWL_ERR(priv, "0x%05X 0x%05X 0x%05X 0x%05X\n", blink1, blink2,
1250                 ilink1, ilink2);
1251
1252         iwl_release_nic_access(priv);
1253 }
1254 EXPORT_SYMBOL(iwl_dump_nic_error_log);
1255
1256 #define EVENT_START_OFFSET  (4 * sizeof(u32))
1257
1258 /**
1259  * iwl_print_event_log - Dump error event log to syslog
1260  *
1261  * NOTE: Must be called with iwl_grab_nic_access() already obtained!
1262  */
1263 static void iwl_print_event_log(struct iwl_priv *priv, u32 start_idx,
1264                                 u32 num_events, u32 mode)
1265 {
1266         u32 i;
1267         u32 base;       /* SRAM byte address of event log header */
1268         u32 event_size; /* 2 u32s, or 3 u32s if timestamp recorded */
1269         u32 ptr;        /* SRAM byte address of log data */
1270         u32 ev, time, data; /* event log data */
1271
1272         if (num_events == 0)
1273                 return;
1274         if (priv->ucode_type == UCODE_INIT)
1275                 base = le32_to_cpu(priv->card_alive_init.log_event_table_ptr);
1276         else
1277                 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1278
1279         if (mode == 0)
1280                 event_size = 2 * sizeof(u32);
1281         else
1282                 event_size = 3 * sizeof(u32);
1283
1284         ptr = base + EVENT_START_OFFSET + (start_idx * event_size);
1285
1286         /* "time" is actually "data" for mode 0 (no timestamp).
1287         * place event id # at far right for easier visual parsing. */
1288         for (i = 0; i < num_events; i++) {
1289                 ev = iwl_read_targ_mem(priv, ptr);
1290                 ptr += sizeof(u32);
1291                 time = iwl_read_targ_mem(priv, ptr);
1292                 ptr += sizeof(u32);
1293                 if (mode == 0) {
1294                         /* data, ev */
1295                         IWL_ERR(priv, "EVT_LOG:0x%08x:%04u\n", time, ev);
1296                 } else {
1297                         data = iwl_read_targ_mem(priv, ptr);
1298                         ptr += sizeof(u32);
1299                         IWL_ERR(priv, "EVT_LOGT:%010u:0x%08x:%04u\n",
1300                                         time, data, ev);
1301                 }
1302         }
1303 }
1304
1305 void iwl_dump_nic_event_log(struct iwl_priv *priv)
1306 {
1307         int ret;
1308         u32 base;       /* SRAM byte address of event log header */
1309         u32 capacity;   /* event log capacity in # entries */
1310         u32 mode;       /* 0 - no timestamp, 1 - timestamp recorded */
1311         u32 num_wraps;  /* # times uCode wrapped to top of log */
1312         u32 next_entry; /* index of next entry to be written by uCode */
1313         u32 size;       /* # entries that we'll print */
1314
1315         if (priv->ucode_type == UCODE_INIT)
1316                 base = le32_to_cpu(priv->card_alive_init.log_event_table_ptr);
1317         else
1318                 base = le32_to_cpu(priv->card_alive.log_event_table_ptr);
1319
1320         if (!priv->cfg->ops->lib->is_valid_rtc_data_addr(base)) {
1321                 IWL_ERR(priv, "Invalid event log pointer 0x%08X\n", base);
1322                 return;
1323         }
1324
1325         ret = iwl_grab_nic_access(priv);
1326         if (ret) {
1327                 IWL_WARN(priv, "Can not read from adapter at this time.\n");
1328                 return;
1329         }
1330
1331         /* event log header */
1332         capacity = iwl_read_targ_mem(priv, base);
1333         mode = iwl_read_targ_mem(priv, base + (1 * sizeof(u32)));
1334         num_wraps = iwl_read_targ_mem(priv, base + (2 * sizeof(u32)));
1335         next_entry = iwl_read_targ_mem(priv, base + (3 * sizeof(u32)));
1336
1337         size = num_wraps ? capacity : next_entry;
1338
1339         /* bail out if nothing in log */
1340         if (size == 0) {
1341                 IWL_ERR(priv, "Start IWL Event Log Dump: nothing in log\n");
1342                 iwl_release_nic_access(priv);
1343                 return;
1344         }
1345
1346         IWL_ERR(priv, "Start IWL Event Log Dump: display count %d, wraps %d\n",
1347                         size, num_wraps);
1348
1349         /* if uCode has wrapped back to top of log, start at the oldest entry,
1350          * i.e the next one that uCode would fill. */
1351         if (num_wraps)
1352                 iwl_print_event_log(priv, next_entry,
1353                                         capacity - next_entry, mode);
1354         /* (then/else) start at top of log */
1355         iwl_print_event_log(priv, 0, next_entry, mode);
1356
1357         iwl_release_nic_access(priv);
1358 }
1359 EXPORT_SYMBOL(iwl_dump_nic_event_log);
1360
1361 void iwl_rf_kill_ct_config(struct iwl_priv *priv)
1362 {
1363         struct iwl_ct_kill_config cmd;
1364         unsigned long flags;
1365         int ret = 0;
1366
1367         spin_lock_irqsave(&priv->lock, flags);
1368         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR,
1369                     CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT);
1370         spin_unlock_irqrestore(&priv->lock, flags);
1371
1372         cmd.critical_temperature_R =
1373                 cpu_to_le32(priv->hw_params.ct_kill_threshold);
1374
1375         ret = iwl_send_cmd_pdu(priv, REPLY_CT_KILL_CONFIG_CMD,
1376                                sizeof(cmd), &cmd);
1377         if (ret)
1378                 IWL_ERR(priv, "REPLY_CT_KILL_CONFIG_CMD failed\n");
1379         else
1380                 IWL_DEBUG_INFO("REPLY_CT_KILL_CONFIG_CMD succeeded, "
1381                         "critical temperature is %d\n",
1382                         cmd.critical_temperature_R);
1383 }
1384 EXPORT_SYMBOL(iwl_rf_kill_ct_config);
1385
1386
1387 /*
1388  * CARD_STATE_CMD
1389  *
1390  * Use: Sets the device's internal card state to enable, disable, or halt
1391  *
1392  * When in the 'enable' state the card operates as normal.
1393  * When in the 'disable' state, the card enters into a low power mode.
1394  * When in the 'halt' state, the card is shut down and must be fully
1395  * restarted to come back on.
1396  */
1397 int iwl_send_card_state(struct iwl_priv *priv, u32 flags, u8 meta_flag)
1398 {
1399         struct iwl_host_cmd cmd = {
1400                 .id = REPLY_CARD_STATE_CMD,
1401                 .len = sizeof(u32),
1402                 .data = &flags,
1403                 .meta.flags = meta_flag,
1404         };
1405
1406         return iwl_send_cmd(priv, &cmd);
1407 }
1408 EXPORT_SYMBOL(iwl_send_card_state);
1409
1410 void iwl_radio_kill_sw_disable_radio(struct iwl_priv *priv)
1411 {
1412         unsigned long flags;
1413
1414         if (test_bit(STATUS_RF_KILL_SW, &priv->status))
1415                 return;
1416
1417         IWL_DEBUG_RF_KILL("Manual SW RF KILL set to: RADIO OFF\n");
1418
1419         iwl_scan_cancel(priv);
1420         /* FIXME: This is a workaround for AP */
1421         if (priv->iw_mode != NL80211_IFTYPE_AP) {
1422                 spin_lock_irqsave(&priv->lock, flags);
1423                 iwl_write32(priv, CSR_UCODE_DRV_GP1_SET,
1424                             CSR_UCODE_SW_BIT_RFKILL);
1425                 spin_unlock_irqrestore(&priv->lock, flags);
1426                 /* call the host command only if no hw rf-kill set */
1427                 if (!test_bit(STATUS_RF_KILL_HW, &priv->status) &&
1428                     iwl_is_ready(priv))
1429                         iwl_send_card_state(priv,
1430                                 CARD_STATE_CMD_DISABLE, 0);
1431                 set_bit(STATUS_RF_KILL_SW, &priv->status);
1432                         /* make sure mac80211 stop sending Tx frame */
1433                 if (priv->mac80211_registered)
1434                         ieee80211_stop_queues(priv->hw);
1435         }
1436 }
1437 EXPORT_SYMBOL(iwl_radio_kill_sw_disable_radio);
1438
1439 int iwl_radio_kill_sw_enable_radio(struct iwl_priv *priv)
1440 {
1441         unsigned long flags;
1442
1443         if (!test_bit(STATUS_RF_KILL_SW, &priv->status))
1444                 return 0;
1445
1446         IWL_DEBUG_RF_KILL("Manual SW RF KILL set to: RADIO ON\n");
1447
1448         spin_lock_irqsave(&priv->lock, flags);
1449         iwl_write32(priv, CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_SW_BIT_RFKILL);
1450
1451         /* If the driver is up it will receive CARD_STATE_NOTIFICATION
1452          * notification where it will clear SW rfkill status.
1453          * Setting it here would break the handler. Only if the
1454          * interface is down we can set here since we don't
1455          * receive any further notification.
1456          */
1457         if (!priv->is_open)
1458                 clear_bit(STATUS_RF_KILL_SW, &priv->status);
1459         spin_unlock_irqrestore(&priv->lock, flags);
1460
1461         /* wake up ucode */
1462         msleep(10);
1463
1464         spin_lock_irqsave(&priv->lock, flags);
1465         iwl_read32(priv, CSR_UCODE_DRV_GP1);
1466         if (!iwl_grab_nic_access(priv))
1467                 iwl_release_nic_access(priv);
1468         spin_unlock_irqrestore(&priv->lock, flags);
1469
1470         if (test_bit(STATUS_RF_KILL_HW, &priv->status)) {
1471                 IWL_DEBUG_RF_KILL("Can not turn radio back on - "
1472                                   "disabled by HW switch\n");
1473                 return 0;
1474         }
1475
1476         /* when driver is up while rfkill is on, it wont receive
1477          * any CARD_STATE_NOTIFICATION notifications so we have to
1478          * restart it in here
1479          */
1480         if (priv->is_open && !test_bit(STATUS_ALIVE, &priv->status)) {
1481                 clear_bit(STATUS_RF_KILL_SW, &priv->status);
1482                 if (!iwl_is_rfkill(priv))
1483                         queue_work(priv->workqueue, &priv->up);
1484         }
1485
1486         /* If the driver is already loaded, it will receive
1487          * CARD_STATE_NOTIFICATION notifications and the handler will
1488          * call restart to reload the driver.
1489          */
1490         return 1;
1491 }
1492 EXPORT_SYMBOL(iwl_radio_kill_sw_enable_radio);
1493
1494 void iwl_bg_rf_kill(struct work_struct *work)
1495 {
1496         struct iwl_priv *priv = container_of(work, struct iwl_priv, rf_kill);
1497
1498         wake_up_interruptible(&priv->wait_command_queue);
1499
1500         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1501                 return;
1502
1503         mutex_lock(&priv->mutex);
1504
1505         if (!iwl_is_rfkill(priv)) {
1506                 IWL_DEBUG(IWL_DL_RF_KILL,
1507                           "HW and/or SW RF Kill no longer active, restarting "
1508                           "device\n");
1509                 if (!test_bit(STATUS_EXIT_PENDING, &priv->status) &&
1510                     test_bit(STATUS_ALIVE, &priv->status))
1511                         queue_work(priv->workqueue, &priv->restart);
1512         } else {
1513                 /* make sure mac80211 stop sending Tx frame */
1514                 if (priv->mac80211_registered)
1515                         ieee80211_stop_queues(priv->hw);
1516
1517                 if (!test_bit(STATUS_RF_KILL_HW, &priv->status))
1518                         IWL_DEBUG_RF_KILL("Can not turn radio back on - "
1519                                           "disabled by SW switch\n");
1520                 else
1521                         IWL_WARN(priv, "Radio Frequency Kill Switch is On:\n"
1522                                     "Kill switch must be turned off for "
1523                                     "wireless networking to work.\n");
1524         }
1525         mutex_unlock(&priv->mutex);
1526         iwl_rfkill_set_hw_state(priv);
1527 }
1528 EXPORT_SYMBOL(iwl_bg_rf_kill);