drivers/net/wireless/iwlwifi/iwl-mac80211.c

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2011 Intel Corporation. All rights reserved.
   4  *
   5  * Portions of this file are derived from the ipw3945 project, as well
   6  * as portions of the ieee80211 subsystem header files.
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of version 2 of the GNU General Public License as
  10  * published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  20  *
  21  * The full GNU General Public License is included in this distribution in the
  22  * file called LICENSE.
  23  *
  24  * Contact Information:
  25  *  Intel Linux Wireless <ilw@linux.intel.com>
  26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27  *
  28  *****************************************************************************/
  29 #include <linux/kernel.h>
  30 #include <linux/module.h>
  31 #include <linux/init.h>
  32 #include <linux/slab.h>
  33 #include <linux/dma-mapping.h>
  34 #include <linux/delay.h>
  35 #include <linux/sched.h>
  36 #include <linux/skbuff.h>
  37 #include <linux/netdevice.h>
  38 #include <linux/firmware.h>
  39 #include <linux/etherdevice.h>
  40 #include <linux/if_arp.h>
  41
  42 #include <net/mac80211.h>
  43
  44 #include <asm/div64.h>
  45
  46 #include "iwl-eeprom.h"
  47 #include "iwl-dev.h"
  48 #include "iwl-core.h"
  49 #include "iwl-io.h"
  50 #include "iwl-agn-calib.h"
  51 #include "iwl-agn.h"
  52 #include "iwl-shared.h"
  53 #include "iwl-bus.h"
  54 #include "iwl-trans.h"
  55
  56 /*****************************************************************************
  57  *
  58  * mac80211 entry point functions
  59  *
  60  *****************************************************************************/
  61
  62 static const struct ieee80211_iface_limit iwlagn_sta_ap_limits[] = {
  63         {
  64                 .max = 1,
  65                 .types = BIT(NL80211_IFTYPE_STATION),
  66         },
  67         {
  68                 .max = 1,
  69                 .types = BIT(NL80211_IFTYPE_AP),
  70         },
  71 };
  72
  73 static const struct ieee80211_iface_limit iwlagn_2sta_limits[] = {
  74         {
  75                 .max = 2,
  76                 .types = BIT(NL80211_IFTYPE_STATION),
  77         },
  78 };
  79
  80 static const struct ieee80211_iface_limit iwlagn_p2p_sta_go_limits[] = {
  81         {
  82                 .max = 1,
  83                 .types = BIT(NL80211_IFTYPE_STATION),
  84         },
  85         {
  86                 .max = 1,
  87                 .types = BIT(NL80211_IFTYPE_P2P_GO) |
  88                          BIT(NL80211_IFTYPE_AP),
  89         },
  90 };
  91
  92 static const struct ieee80211_iface_limit iwlagn_p2p_2sta_limits[] = {
  93         {
  94                 .max = 2,
  95                 .types = BIT(NL80211_IFTYPE_STATION),
  96         },
  97         {
  98                 .max = 1,
  99                 .types = BIT(NL80211_IFTYPE_P2P_CLIENT),
 100         },
 101 };
 102
 103 static const struct ieee80211_iface_combination
 104 iwlagn_iface_combinations_dualmode[] = {
 105         { .num_different_channels = 1,
 106           .max_interfaces = 2,
 107           .beacon_int_infra_match = true,
 108           .limits = iwlagn_sta_ap_limits,
 109           .n_limits = ARRAY_SIZE(iwlagn_sta_ap_limits),
 110         },
 111         { .num_different_channels = 1,
 112           .max_interfaces = 2,
 113           .limits = iwlagn_2sta_limits,
 114           .n_limits = ARRAY_SIZE(iwlagn_2sta_limits),
 115         },
 116 };
 117
 118 static const struct ieee80211_iface_combination
 119 iwlagn_iface_combinations_p2p[] = {
 120         { .num_different_channels = 1,
 121           .max_interfaces = 2,
 122           .beacon_int_infra_match = true,
 123           .limits = iwlagn_p2p_sta_go_limits,
 124           .n_limits = ARRAY_SIZE(iwlagn_p2p_sta_go_limits),
 125         },
 126         { .num_different_channels = 1,
 127           .max_interfaces = 2,
 128           .limits = iwlagn_p2p_2sta_limits,
 129           .n_limits = ARRAY_SIZE(iwlagn_p2p_2sta_limits),
 130         },
 131 };
 132
 133 /*
 134  * Not a mac80211 entry point function, but it fits in with all the
 135  * other mac80211 functions grouped here.
 136  */
 137 int iwlagn_mac_setup_register(struct iwl_priv *priv,
 138                                   struct iwlagn_ucode_capabilities *capa)
 139 {
 140         int ret;
 141         struct ieee80211_hw *hw = priv->hw;
 142         struct iwl_rxon_context *ctx;
 143
 144         hw->rate_control_algorithm = "iwl-agn-rs";
 145
 146         /* Tell mac80211 our characteristics */
 147         hw->flags = IEEE80211_HW_SIGNAL_DBM |
 148                     IEEE80211_HW_AMPDU_AGGREGATION |
 149                     IEEE80211_HW_NEED_DTIM_PERIOD |
 150                     IEEE80211_HW_SPECTRUM_MGMT |
 151                     IEEE80211_HW_REPORTS_TX_ACK_STATUS;
 152
 153         /*
 154          * Including the following line will crash some AP's.  This
 155          * workaround removes the stimulus which causes the crash until
 156          * the AP software can be fixed.
 157         hw->max_tx_aggregation_subframes = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
 158          */
 159
 160         hw->flags |= IEEE80211_HW_SUPPORTS_PS |
 161                      IEEE80211_HW_SUPPORTS_DYNAMIC_PS;
 162
 163         if (priv->cfg->sku & EEPROM_SKU_CAP_11N_ENABLE)
 164                 hw->flags |= IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS |
 165                              IEEE80211_HW_SUPPORTS_STATIC_SMPS;
 166
 167         if (capa->flags & IWL_UCODE_TLV_FLAGS_MFP)
 168                 hw->flags |= IEEE80211_HW_MFP_CAPABLE;
 169
 170         hw->sta_data_size = sizeof(struct iwl_station_priv);
 171         hw->vif_data_size = sizeof(struct iwl_vif_priv);
 172
 173         for_each_context(priv, ctx) {
 174                 hw->wiphy->interface_modes |= ctx->interface_modes;
 175                 hw->wiphy->interface_modes |= ctx->exclusive_interface_modes;
 176         }
 177
 178         BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
 179
 180         if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_P2P_CLIENT)) {
 181                 hw->wiphy->iface_combinations = iwlagn_iface_combinations_p2p;
 182                 hw->wiphy->n_iface_combinations =
 183                         ARRAY_SIZE(iwlagn_iface_combinations_p2p);
 184         } else if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
 185                 hw->wiphy->iface_combinations =
 186                         iwlagn_iface_combinations_dualmode;
 187                 hw->wiphy->n_iface_combinations =
 188                         ARRAY_SIZE(iwlagn_iface_combinations_dualmode);
 189         }
 190
 191         hw->wiphy->max_remain_on_channel_duration = 1000;
 192
 193         hw->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY |
 194                             WIPHY_FLAG_DISABLE_BEACON_HINTS |
 195                             WIPHY_FLAG_IBSS_RSN;
 196
 197         if (trans(priv)->ucode_wowlan.code.len &&
 198             device_can_wakeup(bus(priv)->dev)) {
 199                 hw->wiphy->wowlan.flags = WIPHY_WOWLAN_MAGIC_PKT |
 200                                           WIPHY_WOWLAN_DISCONNECT |
 201                                           WIPHY_WOWLAN_EAP_IDENTITY_REQ |
 202                                           WIPHY_WOWLAN_RFKILL_RELEASE;
 203                 if (!iwlagn_mod_params.sw_crypto)
 204                         hw->wiphy->wowlan.flags |=
 205                                 WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
 206                                 WIPHY_WOWLAN_GTK_REKEY_FAILURE;
 207
 208                 hw->wiphy->wowlan.n_patterns = IWLAGN_WOWLAN_MAX_PATTERNS;
 209                 hw->wiphy->wowlan.pattern_min_len =
 210                                         IWLAGN_WOWLAN_MIN_PATTERN_LEN;
 211                 hw->wiphy->wowlan.pattern_max_len =
 212                                         IWLAGN_WOWLAN_MAX_PATTERN_LEN;
 213         }
 214
 215         if (iwlagn_mod_params.power_save)
 216                 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
 217         else
 218                 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
 219
 220         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
 221         /* we create the 802.11 header and a zero-length SSID element */
 222         hw->wiphy->max_scan_ie_len = capa->max_probe_length - 24 - 2;
 223
 224         /* Default value; 4 EDCA QOS priorities */
 225         hw->queues = 4;
 226
 227         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
 228
 229         if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
 230                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
 231                         &priv->bands[IEEE80211_BAND_2GHZ];
 232         if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
 233                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
 234                         &priv->bands[IEEE80211_BAND_5GHZ];
 235
 236         iwl_leds_init(priv);
 237
 238         ret = ieee80211_register_hw(priv->hw);
 239         if (ret) {
 240                 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
 241                 return ret;
 242         }
 243         priv->mac80211_registered = 1;
 244
 245         return 0;
 246 }
 247
 248 static int __iwl_up(struct iwl_priv *priv)
 249 {
 250         struct iwl_rxon_context *ctx;
 251         int ret;
 252
 253         lockdep_assert_held(&priv->shrd->mutex);
 254
 255         if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status)) {
 256                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
 257                 return -EIO;
 258         }
 259
 260         for_each_context(priv, ctx) {
 261                 ret = iwlagn_alloc_bcast_station(priv, ctx);
 262                 if (ret) {
 263                         iwl_dealloc_bcast_stations(priv);
 264                         return ret;
 265                 }
 266         }
 267
 268         ret = iwlagn_run_init_ucode(priv);
 269         if (ret) {
 270                 IWL_ERR(priv, "Failed to run INIT ucode: %d\n", ret);
 271                 goto error;
 272         }
 273
 274         ret = iwlagn_load_ucode_wait_alive(priv, IWL_UCODE_REGULAR);
 275         if (ret) {
 276                 IWL_ERR(priv, "Failed to start RT ucode: %d\n", ret);
 277                 goto error;
 278         }
 279
 280         ret = iwl_alive_start(priv);
 281         if (ret)
 282                 goto error;
 283         return 0;
 284
 285  error:
 286         set_bit(STATUS_EXIT_PENDING, &priv->shrd->status);
 287         __iwl_down(priv);
 288         clear_bit(STATUS_EXIT_PENDING, &priv->shrd->status);
 289
 290         IWL_ERR(priv, "Unable to initialize device.\n");
 291         return ret;
 292 }
 293
 294 static int iwlagn_mac_start(struct ieee80211_hw *hw)
 295 {
 296         struct iwl_priv *priv = hw->priv;
 297         int ret;
 298
 299         IWL_DEBUG_MAC80211(priv, "enter\n");
 300
 301         /* we should be verifying the device is ready to be opened */
 302         mutex_lock(&priv->shrd->mutex);
 303         ret = __iwl_up(priv);
 304         mutex_unlock(&priv->shrd->mutex);
 305         if (ret)
 306                 return ret;
 307
 308         IWL_DEBUG_INFO(priv, "Start UP work done.\n");
 309
 310         /* Now we should be done, and the READY bit should be set. */
 311         if (WARN_ON(!test_bit(STATUS_READY, &priv->shrd->status)))
 312                 ret = -EIO;
 313
 314         iwlagn_led_enable(priv);
 315
 316         priv->is_open = 1;
 317         IWL_DEBUG_MAC80211(priv, "leave\n");
 318         return 0;
 319 }
 320
 321 static void iwlagn_mac_stop(struct ieee80211_hw *hw)
 322 {
 323         struct iwl_priv *priv = hw->priv;
 324
 325         IWL_DEBUG_MAC80211(priv, "enter\n");
 326
 327         if (!priv->is_open)
 328                 return;
 329
 330         priv->is_open = 0;
 331
 332         iwl_down(priv);
 333
 334         flush_workqueue(priv->shrd->workqueue);
 335
 336         /* User space software may expect getting rfkill changes
 337          * even if interface is down */
 338         iwl_write32(bus(priv), CSR_INT, 0xFFFFFFFF);
 339         iwl_enable_rfkill_int(priv);
 340
 341         IWL_DEBUG_MAC80211(priv, "leave\n");
 342 }
 343
 344 static void iwlagn_mac_set_rekey_data(struct ieee80211_hw *hw,
 345                                       struct ieee80211_vif *vif,
 346                                       struct cfg80211_gtk_rekey_data *data)
 347 {
 348         struct iwl_priv *priv = hw->priv;
 349
 350         if (iwlagn_mod_params.sw_crypto)
 351                 return;
 352
 353         IWL_DEBUG_MAC80211(priv, "enter\n");
 354         mutex_lock(&priv->shrd->mutex);
 355
 356         if (priv->contexts[IWL_RXON_CTX_BSS].vif != vif)
 357                 goto out;
 358
 359         memcpy(priv->kek, data->kek, NL80211_KEK_LEN);
 360         memcpy(priv->kck, data->kck, NL80211_KCK_LEN);
 361         priv->replay_ctr =
 362                 cpu_to_le64(be64_to_cpup((__be64 *)&data->replay_ctr));
 363         priv->have_rekey_data = true;
 364
 365  out:
 366         mutex_unlock(&priv->shrd->mutex);
 367         IWL_DEBUG_MAC80211(priv, "leave\n");
 368 }
 369
 370 #ifdef CONFIG_PM_SLEEP
 371 struct wowlan_key_data {
 372         struct iwl_rxon_context *ctx;
 373         struct iwlagn_wowlan_rsc_tsc_params_cmd *rsc_tsc;
 374         struct iwlagn_wowlan_tkip_params_cmd *tkip;
 375         const u8 *bssid;
 376         bool error, use_rsc_tsc, use_tkip;
 377 };
 378
 379 static void iwlagn_convert_p1k(u16 *p1k, __le16 *out)
 380 {
 381         int i;
 382
 383         for (i = 0; i < IWLAGN_P1K_SIZE; i++)
 384                 out[i] = cpu_to_le16(p1k[i]);
 385 }
 386
 387 static void iwlagn_wowlan_program_keys(struct ieee80211_hw *hw,
 388                                        struct ieee80211_vif *vif,
 389                                        struct ieee80211_sta *sta,
 390                                        struct ieee80211_key_conf *key,
 391                                        void *_data)
 392 {
 393         struct iwl_priv *priv = hw->priv;
 394         struct wowlan_key_data *data = _data;
 395         struct iwl_rxon_context *ctx = data->ctx;
 396         struct aes_sc *aes_sc, *aes_tx_sc = NULL;
 397         struct tkip_sc *tkip_sc, *tkip_tx_sc = NULL;
 398         struct iwlagn_p1k_cache *rx_p1ks;
 399         u8 *rx_mic_key;
 400         struct ieee80211_key_seq seq;
 401         u32 cur_rx_iv32 = 0;
 402         u16 p1k[IWLAGN_P1K_SIZE];
 403         int ret, i;
 404
 405         mutex_lock(&priv->shrd->mutex);
 406
 407         if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
 408              key->cipher == WLAN_CIPHER_SUITE_WEP104) &&
 409              !sta && !ctx->key_mapping_keys)
 410                 ret = iwl_set_default_wep_key(priv, ctx, key);
 411         else
 412                 ret = iwl_set_dynamic_key(priv, ctx, key, sta);
 413
 414         if (ret) {
 415                 IWL_ERR(priv, "Error setting key during suspend!\n");
 416                 data->error = true;
 417         }
 418
 419         switch (key->cipher) {
 420         case WLAN_CIPHER_SUITE_TKIP:
 421                 if (sta) {
 422                         tkip_sc = data->rsc_tsc->all_tsc_rsc.tkip.unicast_rsc;
 423                         tkip_tx_sc = &data->rsc_tsc->all_tsc_rsc.tkip.tsc;
 424
 425                         rx_p1ks = data->tkip->rx_uni;
 426
 427                         ieee80211_get_key_tx_seq(key, &seq);
 428                         tkip_tx_sc->iv16 = cpu_to_le16(seq.tkip.iv16);
 429                         tkip_tx_sc->iv32 = cpu_to_le32(seq.tkip.iv32);
 430
 431                         ieee80211_get_tkip_p1k_iv(key, seq.tkip.iv32, p1k);
 432                         iwlagn_convert_p1k(p1k, data->tkip->tx.p1k);
 433
 434                         memcpy(data->tkip->mic_keys.tx,
 435                                &key->key[NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY],
 436                                IWLAGN_MIC_KEY_SIZE);
 437
 438                         rx_mic_key = data->tkip->mic_keys.rx_unicast;
 439                 } else {
 440                         tkip_sc = data->rsc_tsc->all_tsc_rsc.tkip.multicast_rsc;
 441                         rx_p1ks = data->tkip->rx_multi;
 442                         rx_mic_key = data->tkip->mic_keys.rx_mcast;
 443                 }
 444
 445                 /*
 446                  * For non-QoS this relies on the fact that both the uCode and
 447                  * mac80211 use TID 0 (as they need to to avoid replay attacks)
 448                  * for checking the IV in the frames.
 449                  */
 450                 for (i = 0; i < IWLAGN_NUM_RSC; i++) {
 451                         ieee80211_get_key_rx_seq(key, i, &seq);
 452                         tkip_sc[i].iv16 = cpu_to_le16(seq.tkip.iv16);
 453                         tkip_sc[i].iv32 = cpu_to_le32(seq.tkip.iv32);
 454                         /* wrapping isn't allowed, AP must rekey */
 455                         if (seq.tkip.iv32 > cur_rx_iv32)
 456                                 cur_rx_iv32 = seq.tkip.iv32;
 457                 }
 458
 459                 ieee80211_get_tkip_rx_p1k(key, data->bssid, cur_rx_iv32, p1k);
 460                 iwlagn_convert_p1k(p1k, rx_p1ks[0].p1k);
 461                 ieee80211_get_tkip_rx_p1k(key, data->bssid,
 462                                           cur_rx_iv32 + 1, p1k);
 463                 iwlagn_convert_p1k(p1k, rx_p1ks[1].p1k);
 464
 465                 memcpy(rx_mic_key,
 466                        &key->key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY],
 467                        IWLAGN_MIC_KEY_SIZE);
 468
 469                 data->use_tkip = true;
 470                 data->use_rsc_tsc = true;
 471                 break;
 472         case WLAN_CIPHER_SUITE_CCMP:
 473                 if (sta) {
 474                         u8 *pn = seq.ccmp.pn;
 475
 476                         aes_sc = data->rsc_tsc->all_tsc_rsc.aes.unicast_rsc;
 477                         aes_tx_sc = &data->rsc_tsc->all_tsc_rsc.aes.tsc;
 478
 479                         ieee80211_get_key_tx_seq(key, &seq);
 480                         aes_tx_sc->pn = cpu_to_le64(
 481                                         (u64)pn[5] |
 482                                         ((u64)pn[4] << 8) |
 483                                         ((u64)pn[3] << 16) |
 484                                         ((u64)pn[2] << 24) |
 485                                         ((u64)pn[1] << 32) |
 486                                         ((u64)pn[0] << 40));
 487                 } else
 488                         aes_sc = data->rsc_tsc->all_tsc_rsc.aes.multicast_rsc;
 489
 490                 /*
 491                  * For non-QoS this relies on the fact that both the uCode and
 492                  * mac80211 use TID 0 for checking the IV in the frames.
 493                  */
 494                 for (i = 0; i < IWLAGN_NUM_RSC; i++) {
 495                         u8 *pn = seq.ccmp.pn;
 496
 497                         ieee80211_get_key_rx_seq(key, i, &seq);
 498                         aes_sc->pn = cpu_to_le64(
 499                                         (u64)pn[5] |
 500                                         ((u64)pn[4] << 8) |
 501                                         ((u64)pn[3] << 16) |
 502                                         ((u64)pn[2] << 24) |
 503                                         ((u64)pn[1] << 32) |
 504                                         ((u64)pn[0] << 40));
 505                 }
 506                 data->use_rsc_tsc = true;
 507                 break;
 508         }
 509
 510         mutex_unlock(&priv->shrd->mutex);
 511 }
 512
 513 static int iwlagn_send_patterns(struct iwl_priv *priv,
 514                                 struct cfg80211_wowlan *wowlan)
 515 {
 516         struct iwlagn_wowlan_patterns_cmd *pattern_cmd;
 517         struct iwl_host_cmd cmd = {
 518                 .id = REPLY_WOWLAN_PATTERNS,
 519                 .dataflags[0] = IWL_HCMD_DFL_NOCOPY,
 520                 .flags = CMD_SYNC,
 521         };
 522         int i, err;
 523
 524         if (!wowlan->n_patterns)
 525                 return 0;
 526
 527         cmd.len[0] = sizeof(*pattern_cmd) +
 528                 wowlan->n_patterns * sizeof(struct iwlagn_wowlan_pattern);
 529
 530         pattern_cmd = kmalloc(cmd.len[0], GFP_KERNEL);
 531         if (!pattern_cmd)
 532                 return -ENOMEM;
 533
 534         pattern_cmd->n_patterns = cpu_to_le32(wowlan->n_patterns);
 535
 536         for (i = 0; i < wowlan->n_patterns; i++) {
 537                 int mask_len = DIV_ROUND_UP(wowlan->patterns[i].pattern_len, 8);
 538
 539                 memcpy(&pattern_cmd->patterns[i].mask,
 540                         wowlan->patterns[i].mask, mask_len);
 541                 memcpy(&pattern_cmd->patterns[i].pattern,
 542                         wowlan->patterns[i].pattern,
 543                         wowlan->patterns[i].pattern_len);
 544                 pattern_cmd->patterns[i].mask_size = mask_len;
 545                 pattern_cmd->patterns[i].pattern_size =
 546                         wowlan->patterns[i].pattern_len;
 547         }
 548
 549         cmd.data[0] = pattern_cmd;
 550         err = iwl_trans_send_cmd(trans(priv), &cmd);
 551         kfree(pattern_cmd);
 552         return err;
 553 }
 554
 555 static int iwlagn_mac_suspend(struct ieee80211_hw *hw,
 556                               struct cfg80211_wowlan *wowlan)
 557 {
 558         struct iwl_priv *priv = hw->priv;
 559         struct iwlagn_wowlan_wakeup_filter_cmd wakeup_filter_cmd;
 560         struct iwl_rxon_cmd rxon;
 561         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 562         struct iwlagn_wowlan_kek_kck_material_cmd kek_kck_cmd;
 563         struct iwlagn_wowlan_tkip_params_cmd tkip_cmd = {};
 564         struct wowlan_key_data key_data = {
 565                 .ctx = ctx,
 566                 .bssid = ctx->active.bssid_addr,
 567                 .use_rsc_tsc = false,
 568                 .tkip = &tkip_cmd,
 569                 .use_tkip = false,
 570         };
 571         struct iwlagn_d3_config_cmd d3_cfg_cmd = {};
 572         int ret, i;
 573         u16 seq;
 574
 575         if (WARN_ON(!wowlan))
 576                 return -EINVAL;
 577
 578         IWL_DEBUG_MAC80211(priv, "enter\n");
 579         mutex_lock(&priv->shrd->mutex);
 580
 581         /* Don't attempt WoWLAN when not associated, tear down instead. */
 582         if (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION ||
 583             !iwl_is_associated_ctx(ctx)) {
 584                 ret = 1;
 585                 goto out;
 586         }
 587
 588         key_data.rsc_tsc = kzalloc(sizeof(*key_data.rsc_tsc), GFP_KERNEL);
 589         if (!key_data.rsc_tsc) {
 590                 ret = -ENOMEM;
 591                 goto out;
 592         }
 593
 594         memset(&wakeup_filter_cmd, 0, sizeof(wakeup_filter_cmd));
 595
 596         /*
 597          * We know the last used seqno, and the uCode expects to know that
 598          * one, it will increment before TX.
 599          */
 600         seq = le16_to_cpu(priv->last_seq_ctl) & IEEE80211_SCTL_SEQ;
 601         wakeup_filter_cmd.non_qos_seq = cpu_to_le16(seq);
 602
 603         /*
 604          * For QoS counters, we store the one to use next, so subtract 0x10
 605          * since the uCode will add 0x10 before using the value.
 606          */
 607         for (i = 0; i < 8; i++) {
 608                 seq = priv->shrd->tid_data[IWL_AP_ID][i].seq_number;
 609                 seq -= 0x10;
 610                 wakeup_filter_cmd.qos_seq[i] = cpu_to_le16(seq);
 611         }
 612
 613         if (wowlan->disconnect)
 614                 wakeup_filter_cmd.enabled |=
 615                         cpu_to_le32(IWLAGN_WOWLAN_WAKEUP_BEACON_MISS |
 616                                     IWLAGN_WOWLAN_WAKEUP_LINK_CHANGE);
 617         if (wowlan->magic_pkt)
 618                 wakeup_filter_cmd.enabled |=
 619                         cpu_to_le32(IWLAGN_WOWLAN_WAKEUP_MAGIC_PACKET);
 620         if (wowlan->gtk_rekey_failure)
 621                 wakeup_filter_cmd.enabled |=
 622                         cpu_to_le32(IWLAGN_WOWLAN_WAKEUP_GTK_REKEY_FAIL);
 623         if (wowlan->eap_identity_req)
 624                 wakeup_filter_cmd.enabled |=
 625                         cpu_to_le32(IWLAGN_WOWLAN_WAKEUP_EAP_IDENT_REQ);
 626         if (wowlan->four_way_handshake)
 627                 wakeup_filter_cmd.enabled |=
 628                         cpu_to_le32(IWLAGN_WOWLAN_WAKEUP_4WAY_HANDSHAKE);
 629         if (wowlan->n_patterns)
 630                 wakeup_filter_cmd.enabled |=
 631                         cpu_to_le32(IWLAGN_WOWLAN_WAKEUP_PATTERN_MATCH);
 632
 633         if (wowlan->rfkill_release)
 634                 d3_cfg_cmd.wakeup_flags |=
 635                         cpu_to_le32(IWLAGN_D3_WAKEUP_RFKILL);
 636
 637         iwl_scan_cancel_timeout(priv, 200);
 638
 639         memcpy(&rxon, &ctx->active, sizeof(rxon));
 640
 641         iwl_trans_stop_device(trans(priv));
 642
 643         priv->shrd->wowlan = true;
 644
 645         ret = iwlagn_load_ucode_wait_alive(priv, IWL_UCODE_WOWLAN);
 646         if (ret)
 647                 goto error;
 648
 649         /* now configure WoWLAN ucode */
 650         ret = iwl_alive_start(priv);
 651         if (ret)
 652                 goto error;
 653
 654         memcpy(&ctx->staging, &rxon, sizeof(rxon));
 655         ret = iwlagn_commit_rxon(priv, ctx);
 656         if (ret)
 657                 goto error;
 658
 659         ret = iwl_power_update_mode(priv, true);
 660         if (ret)
 661                 goto error;
 662
 663         if (!iwlagn_mod_params.sw_crypto) {
 664                 /* mark all keys clear */
 665                 priv->ucode_key_table = 0;
 666                 ctx->key_mapping_keys = 0;
 667
 668                 /*
 669                  * This needs to be unlocked due to lock ordering
 670                  * constraints. Since we're in the suspend path
 671                  * that isn't really a problem though.
 672                  */
 673                 mutex_unlock(&priv->shrd->mutex);
 674                 ieee80211_iter_keys(priv->hw, ctx->vif,
 675                                     iwlagn_wowlan_program_keys,
 676                                     &key_data);
 677                 mutex_lock(&priv->shrd->mutex);
 678                 if (key_data.error) {
 679                         ret = -EIO;
 680                         goto error;
 681                 }
 682
 683                 if (key_data.use_rsc_tsc) {
 684                         struct iwl_host_cmd rsc_tsc_cmd = {
 685                                 .id = REPLY_WOWLAN_TSC_RSC_PARAMS,
 686                                 .flags = CMD_SYNC,
 687                                 .data[0] = key_data.rsc_tsc,
 688                                 .dataflags[0] = IWL_HCMD_DFL_NOCOPY,
 689                                 .len[0] = sizeof(*key_data.rsc_tsc),
 690                         };
 691
 692                         ret = iwl_trans_send_cmd(trans(priv), &rsc_tsc_cmd);
 693                         if (ret)
 694                                 goto error;
 695                 }
 696
 697                 if (key_data.use_tkip) {
 698                         ret = iwl_trans_send_cmd_pdu(trans(priv),
 699                                                  REPLY_WOWLAN_TKIP_PARAMS,
 700                                                  CMD_SYNC, sizeof(tkip_cmd),
 701                                                  &tkip_cmd);
 702                         if (ret)
 703                                 goto error;
 704                 }
 705
 706                 if (priv->have_rekey_data) {
 707                         memset(&kek_kck_cmd, 0, sizeof(kek_kck_cmd));
 708                         memcpy(kek_kck_cmd.kck, priv->kck, NL80211_KCK_LEN);
 709                         kek_kck_cmd.kck_len = cpu_to_le16(NL80211_KCK_LEN);
 710                         memcpy(kek_kck_cmd.kek, priv->kek, NL80211_KEK_LEN);
 711                         kek_kck_cmd.kek_len = cpu_to_le16(NL80211_KEK_LEN);
 712                         kek_kck_cmd.replay_ctr = priv->replay_ctr;
 713
 714                         ret = iwl_trans_send_cmd_pdu(trans(priv),
 715                                                  REPLY_WOWLAN_KEK_KCK_MATERIAL,
 716                                                  CMD_SYNC, sizeof(kek_kck_cmd),
 717                                                  &kek_kck_cmd);
 718                         if (ret)
 719                                 goto error;
 720                 }
 721         }
 722
 723         ret = iwl_trans_send_cmd_pdu(trans(priv), REPLY_D3_CONFIG, CMD_SYNC,
 724                                      sizeof(d3_cfg_cmd), &d3_cfg_cmd);
 725         if (ret)
 726                 goto error;
 727
 728         ret = iwl_trans_send_cmd_pdu(trans(priv), REPLY_WOWLAN_WAKEUP_FILTER,
 729                                  CMD_SYNC, sizeof(wakeup_filter_cmd),
 730                                  &wakeup_filter_cmd);
 731         if (ret)
 732                 goto error;
 733
 734         ret = iwlagn_send_patterns(priv, wowlan);
 735         if (ret)
 736                 goto error;
 737
 738         device_set_wakeup_enable(bus(priv)->dev, true);
 739
 740         /* Now let the ucode operate on its own */
 741         iwl_write32(bus(priv), CSR_UCODE_DRV_GP1_SET,
 742                           CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE);
 743
 744         goto out;
 745
 746  error:
 747         priv->shrd->wowlan = false;
 748         iwlagn_prepare_restart(priv);
 749         ieee80211_restart_hw(priv->hw);
 750  out:
 751         mutex_unlock(&priv->shrd->mutex);
 752         kfree(key_data.rsc_tsc);
 753         IWL_DEBUG_MAC80211(priv, "leave\n");
 754
 755         return ret;
 756 }
 757
 758 static int iwlagn_mac_resume(struct ieee80211_hw *hw)
 759 {
 760         struct iwl_priv *priv = hw->priv;
 761         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 762         struct ieee80211_vif *vif;
 763         unsigned long flags;
 764         u32 base, status = 0xffffffff;
 765         int ret = -EIO;
 766
 767         IWL_DEBUG_MAC80211(priv, "enter\n");
 768         mutex_lock(&priv->shrd->mutex);
 769
 770         iwl_write32(bus(priv), CSR_UCODE_DRV_GP1_CLR,
 771                           CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE);
 772
 773         base = priv->device_pointers.error_event_table;
 774         if (iwlagn_hw_valid_rtc_data_addr(base)) {
 775                 spin_lock_irqsave(&bus(priv)->reg_lock, flags);
 776                 ret = iwl_grab_nic_access_silent(bus(priv));
 777                 if (ret == 0) {
 778                         iwl_write32(bus(priv), HBUS_TARG_MEM_RADDR, base);
 779                         status = iwl_read32(bus(priv), HBUS_TARG_MEM_RDAT);
 780                         iwl_release_nic_access(bus(priv));
 781                 }
 782                 spin_unlock_irqrestore(&bus(priv)->reg_lock, flags);
 783
 784 #ifdef CONFIG_IWLWIFI_DEBUGFS
 785                 if (ret == 0) {
 786                         struct iwl_trans *trans = trans(priv);
 787                         if (!priv->wowlan_sram)
 788                                 priv->wowlan_sram =
 789                                         kzalloc(trans->ucode_wowlan.data.len,
 790                                                 GFP_KERNEL);
 791
 792                         if (priv->wowlan_sram)
 793                                 _iwl_read_targ_mem_words(
 794                                         bus(priv), 0x800000, priv->wowlan_sram,
 795                                         trans->ucode_wowlan.data.len / 4);
 796                 }
 797 #endif
 798         }
 799
 800         /* we'll clear ctx->vif during iwlagn_prepare_restart() */
 801         vif = ctx->vif;
 802
 803         priv->shrd->wowlan = false;
 804
 805         device_set_wakeup_enable(bus(priv)->dev, false);
 806
 807         iwlagn_prepare_restart(priv);
 808
 809         memset((void *)&ctx->active, 0, sizeof(ctx->active));
 810         iwl_connection_init_rx_config(priv, ctx);
 811         iwlagn_set_rxon_chain(priv, ctx);
 812
 813         mutex_unlock(&priv->shrd->mutex);
 814         IWL_DEBUG_MAC80211(priv, "leave\n");
 815
 816         ieee80211_resume_disconnect(vif);
 817
 818         return 1;
 819 }
 820
 821 #endif
 822
 823 static void iwlagn_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
 824 {
 825         struct iwl_priv *priv = hw->priv;
 826
 827         IWL_DEBUG_MACDUMP(priv, "enter\n");
 828
 829         IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len,
 830                      ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate);
 831
 832         if (iwlagn_tx_skb(priv, skb))
 833                 dev_kfree_skb_any(skb);
 834
 835         IWL_DEBUG_MACDUMP(priv, "leave\n");
 836 }
 837
 838 static void iwlagn_mac_update_tkip_key(struct ieee80211_hw *hw,
 839                                        struct ieee80211_vif *vif,
 840                                        struct ieee80211_key_conf *keyconf,
 841                                        struct ieee80211_sta *sta,
 842                                        u32 iv32, u16 *phase1key)
 843 {
 844         struct iwl_priv *priv = hw->priv;
 845
 846         iwl_update_tkip_key(priv, vif, keyconf, sta, iv32, phase1key);
 847 }
 848
 849 static int iwlagn_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
 850                               struct ieee80211_vif *vif,
 851                               struct ieee80211_sta *sta,
 852                               struct ieee80211_key_conf *key)
 853 {
 854         struct iwl_priv *priv = hw->priv;
 855         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
 856         struct iwl_rxon_context *ctx = vif_priv->ctx;
 857         int ret;
 858         bool is_default_wep_key = false;
 859
 860         IWL_DEBUG_MAC80211(priv, "enter\n");
 861
 862         if (iwlagn_mod_params.sw_crypto) {
 863                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
 864                 return -EOPNOTSUPP;
 865         }
 866
 867         /*
 868          * We could program these keys into the hardware as well, but we
 869          * don't expect much multicast traffic in IBSS and having keys
 870          * for more stations is probably more useful.
 871          *
 872          * Mark key TX-only and return 0.
 873          */
 874         if (vif->type == NL80211_IFTYPE_ADHOC &&
 875             !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
 876                 key->hw_key_idx = WEP_INVALID_OFFSET;
 877                 return 0;
 878         }
 879
 880         /* If they key was TX-only, accept deletion */
 881         if (cmd == DISABLE_KEY && key->hw_key_idx == WEP_INVALID_OFFSET)
 882                 return 0;
 883
 884         mutex_lock(&priv->shrd->mutex);
 885         iwl_scan_cancel_timeout(priv, 100);
 886
 887         BUILD_BUG_ON(WEP_INVALID_OFFSET == IWLAGN_HW_KEY_DEFAULT);
 888
 889         /*
 890          * If we are getting WEP group key and we didn't receive any key mapping
 891          * so far, we are in legacy wep mode (group key only), otherwise we are
 892          * in 1X mode.
 893          * In legacy wep mode, we use another host command to the uCode.
 894          */
 895         if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
 896              key->cipher == WLAN_CIPHER_SUITE_WEP104) && !sta) {
 897                 if (cmd == SET_KEY)
 898                         is_default_wep_key = !ctx->key_mapping_keys;
 899                 else
 900                         is_default_wep_key =
 901                                 key->hw_key_idx == IWLAGN_HW_KEY_DEFAULT;
 902         }
 903
 904
 905         switch (cmd) {
 906         case SET_KEY:
 907                 if (is_default_wep_key) {
 908                         ret = iwl_set_default_wep_key(priv, vif_priv->ctx, key);
 909                         break;
 910                 }
 911                 ret = iwl_set_dynamic_key(priv, vif_priv->ctx, key, sta);
 912                 if (ret) {
 913                         /*
 914                          * can't add key for RX, but we don't need it
 915                          * in the device for TX so still return 0
 916                          */
 917                         ret = 0;
 918                         key->hw_key_idx = WEP_INVALID_OFFSET;
 919                 }
 920
 921                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
 922                 break;
 923         case DISABLE_KEY:
 924                 if (is_default_wep_key)
 925                         ret = iwl_remove_default_wep_key(priv, ctx, key);
 926                 else
 927                         ret = iwl_remove_dynamic_key(priv, ctx, key, sta);
 928
 929                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
 930                 break;
 931         default:
 932                 ret = -EINVAL;
 933         }
 934
 935         mutex_unlock(&priv->shrd->mutex);
 936         IWL_DEBUG_MAC80211(priv, "leave\n");
 937
 938         return ret;
 939 }
 940
 941 static int iwlagn_mac_ampdu_action(struct ieee80211_hw *hw,
 942                                    struct ieee80211_vif *vif,
 943                                    enum ieee80211_ampdu_mlme_action action,
 944                                    struct ieee80211_sta *sta, u16 tid, u16 *ssn,
 945                                    u8 buf_size)
 946 {
 947         struct iwl_priv *priv = hw->priv;
 948         int ret = -EINVAL;
 949         struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;
 950         struct iwl_rxon_context *ctx =  iwl_rxon_ctx_from_vif(vif);
 951
 952         IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n",
 953                      sta->addr, tid);
 954
 955         if (!(priv->cfg->sku & EEPROM_SKU_CAP_11N_ENABLE))
 956                 return -EACCES;
 957
 958         IWL_DEBUG_MAC80211(priv, "enter\n");
 959         mutex_lock(&priv->shrd->mutex);
 960
 961         switch (action) {
 962         case IEEE80211_AMPDU_RX_START:
 963                 IWL_DEBUG_HT(priv, "start Rx\n");
 964                 ret = iwl_sta_rx_agg_start(priv, sta, tid, *ssn);
 965                 break;
 966         case IEEE80211_AMPDU_RX_STOP:
 967                 IWL_DEBUG_HT(priv, "stop Rx\n");
 968                 ret = iwl_sta_rx_agg_stop(priv, sta, tid);
 969                 if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
 970                         ret = 0;
 971                 break;
 972         case IEEE80211_AMPDU_TX_START:
 973                 IWL_DEBUG_HT(priv, "start Tx\n");
 974                 ret = iwlagn_tx_agg_start(priv, vif, sta, tid, ssn);
 975                 break;
 976         case IEEE80211_AMPDU_TX_STOP:
 977                 IWL_DEBUG_HT(priv, "stop Tx\n");
 978                 ret = iwlagn_tx_agg_stop(priv, vif, sta, tid);
 979                 if ((ret == 0) && (priv->agg_tids_count > 0)) {
 980                         priv->agg_tids_count--;
 981                         IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n",
 982                                      priv->agg_tids_count);
 983                 }
 984                 if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
 985                         ret = 0;
 986                 if (!priv->agg_tids_count && priv->cfg->ht_params &&
 987                     priv->cfg->ht_params->use_rts_for_aggregation) {
 988                         /*
 989                          * switch off RTS/CTS if it was previously enabled
 990                          */
 991                         sta_priv->lq_sta.lq.general_params.flags &=
 992                                 ~LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
 993                         iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif),
 994                                         &sta_priv->lq_sta.lq, CMD_ASYNC, false);
 995                 }
 996                 break;
 997         case IEEE80211_AMPDU_TX_OPERATIONAL:
 998                 buf_size = min_t(int, buf_size, LINK_QUAL_AGG_FRAME_LIMIT_DEF);
 999
1000                 iwl_trans_tx_agg_setup(trans(priv), ctx->ctxid, iwl_sta_id(sta),
1001                                 tid, buf_size);
1002
1003                 /*
1004                  * If the limit is 0, then it wasn't initialised yet,
1005                  * use the default. We can do that since we take the
1006                  * minimum below, and we don't want to go above our
1007                  * default due to hardware restrictions.
1008                  */
1009                 if (sta_priv->max_agg_bufsize == 0)
1010                         sta_priv->max_agg_bufsize =
1011                                 LINK_QUAL_AGG_FRAME_LIMIT_DEF;
1012
1013                 /*
1014                  * Even though in theory the peer could have different
1015                  * aggregation reorder buffer sizes for different sessions,
1016                  * our ucode doesn't allow for that and has a global limit
1017                  * for each station. Therefore, use the minimum of all the
1018                  * aggregation sessions and our default value.
1019                  */
1020                 sta_priv->max_agg_bufsize =
1021                         min(sta_priv->max_agg_bufsize, buf_size);
1022
1023                 if (priv->cfg->ht_params &&
1024                     priv->cfg->ht_params->use_rts_for_aggregation) {
1025                         /*
1026                          * switch to RTS/CTS if it is the prefer protection
1027                          * method for HT traffic
1028                          */
1029
1030                         sta_priv->lq_sta.lq.general_params.flags |=
1031                                 LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
1032                 }
1033                 priv->agg_tids_count++;
1034                 IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n",
1035                              priv->agg_tids_count);
1036
1037                 sta_priv->lq_sta.lq.agg_params.agg_frame_cnt_limit =
1038                         sta_priv->max_agg_bufsize;
1039
1040                 iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif),
1041                                 &sta_priv->lq_sta.lq, CMD_ASYNC, false);
1042
1043                 IWL_INFO(priv, "Tx aggregation enabled on ra = %pM tid = %d\n",
1044                          sta->addr, tid);
1045                 ret = 0;
1046                 break;
1047         }
1048         mutex_unlock(&priv->shrd->mutex);
1049         IWL_DEBUG_MAC80211(priv, "leave\n");
1050         return ret;
1051 }
1052
1053 static int iwlagn_mac_sta_add(struct ieee80211_hw *hw,
1054                               struct ieee80211_vif *vif,
1055                               struct ieee80211_sta *sta)
1056 {
1057         struct iwl_priv *priv = hw->priv;
1058         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
1059         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1060         bool is_ap = vif->type == NL80211_IFTYPE_STATION;
1061         int ret = 0;
1062         u8 sta_id;
1063
1064         IWL_DEBUG_MAC80211(priv, "received request to add station %pM\n",
1065                         sta->addr);
1066         mutex_lock(&priv->shrd->mutex);
1067         IWL_DEBUG_INFO(priv, "proceeding to add station %pM\n",
1068                         sta->addr);
1069         sta_priv->sta_id = IWL_INVALID_STATION;
1070
1071         atomic_set(&sta_priv->pending_frames, 0);
1072         if (vif->type == NL80211_IFTYPE_AP)
1073                 sta_priv->client = true;
1074
1075         ret = iwl_add_station_common(priv, vif_priv->ctx, sta->addr,
1076                                      is_ap, sta, &sta_id);
1077         if (ret) {
1078                 IWL_ERR(priv, "Unable to add station %pM (%d)\n",
1079                         sta->addr, ret);
1080                 /* Should we return success if return code is EEXIST ? */
1081                 goto out;
1082         }
1083
1084         sta_priv->sta_id = sta_id;
1085
1086         /* Initialize rate scaling */
1087         IWL_DEBUG_INFO(priv, "Initializing rate scaling for station %pM\n",
1088                        sta->addr);
1089         iwl_rs_rate_init(priv, sta, sta_id);
1090  out:
1091         mutex_unlock(&priv->shrd->mutex);
1092         IWL_DEBUG_MAC80211(priv, "leave\n");
1093
1094         return ret;
1095 }
1096
1097 static void iwlagn_mac_channel_switch(struct ieee80211_hw *hw,
1098                                 struct ieee80211_channel_switch *ch_switch)
1099 {
1100         struct iwl_priv *priv = hw->priv;
1101         const struct iwl_channel_info *ch_info;
1102         struct ieee80211_conf *conf = &hw->conf;
1103         struct ieee80211_channel *channel = ch_switch->channel;
1104         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
1105         /*
1106          * MULTI-FIXME
1107          * When we add support for multiple interfaces, we need to
1108          * revisit this. The channel switch command in the device
1109          * only affects the BSS context, but what does that really
1110          * mean? And what if we get a CSA on the second interface?
1111          * This needs a lot of work.
1112          */
1113         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1114         u16 ch;
1115
1116         IWL_DEBUG_MAC80211(priv, "enter\n");
1117
1118         mutex_lock(&priv->shrd->mutex);
1119
1120         if (iwl_is_rfkill(priv->shrd))
1121                 goto out;
1122
1123         if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status) ||
1124             test_bit(STATUS_SCANNING, &priv->shrd->status) ||
1125             test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->shrd->status))
1126                 goto out;
1127
1128         if (!iwl_is_associated_ctx(ctx))
1129                 goto out;
1130
1131         if (!priv->cfg->lib->set_channel_switch)
1132                 goto out;
1133
1134         ch = channel->hw_value;
1135         if (le16_to_cpu(ctx->active.channel) == ch)
1136                 goto out;
1137
1138         ch_info = iwl_get_channel_info(priv, channel->band, ch);
1139         if (!is_channel_valid(ch_info)) {
1140                 IWL_DEBUG_MAC80211(priv, "invalid channel\n");
1141                 goto out;
1142         }
1143
1144         spin_lock_irq(&priv->shrd->lock);
1145
1146         priv->current_ht_config.smps = conf->smps_mode;
1147
1148         /* Configure HT40 channels */
1149         ctx->ht.enabled = conf_is_ht(conf);
1150         if (ctx->ht.enabled) {
1151                 if (conf_is_ht40_minus(conf)) {
1152                         ctx->ht.extension_chan_offset =
1153                                 IEEE80211_HT_PARAM_CHA_SEC_BELOW;
1154                         ctx->ht.is_40mhz = true;
1155                 } else if (conf_is_ht40_plus(conf)) {
1156                         ctx->ht.extension_chan_offset =
1157                                 IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
1158                         ctx->ht.is_40mhz = true;
1159                 } else {
1160                         ctx->ht.extension_chan_offset =
1161                                 IEEE80211_HT_PARAM_CHA_SEC_NONE;
1162                         ctx->ht.is_40mhz = false;
1163                 }
1164         } else
1165                 ctx->ht.is_40mhz = false;
1166
1167         if ((le16_to_cpu(ctx->staging.channel) != ch))
1168                 ctx->staging.flags = 0;
1169
1170         iwl_set_rxon_channel(priv, channel, ctx);
1171         iwl_set_rxon_ht(priv, ht_conf);
1172         iwl_set_flags_for_band(priv, ctx, channel->band, ctx->vif);
1173
1174         spin_unlock_irq(&priv->shrd->lock);
1175
1176         iwl_set_rate(priv);
1177         /*
1178          * at this point, staging_rxon has the
1179          * configuration for channel switch
1180          */
1181         set_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->shrd->status);
1182         priv->switch_channel = cpu_to_le16(ch);
1183         if (priv->cfg->lib->set_channel_switch(priv, ch_switch)) {
1184                 clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->shrd->status);
1185                 priv->switch_channel = 0;
1186                 ieee80211_chswitch_done(ctx->vif, false);
1187         }
1188
1189 out:
1190         mutex_unlock(&priv->shrd->mutex);
1191         IWL_DEBUG_MAC80211(priv, "leave\n");
1192 }
1193
1194 static void iwlagn_configure_filter(struct ieee80211_hw *hw,
1195                                     unsigned int changed_flags,
1196                                     unsigned int *total_flags,
1197                                     u64 multicast)
1198 {
1199         struct iwl_priv *priv = hw->priv;
1200         __le32 filter_or = 0, filter_nand = 0;
1201         struct iwl_rxon_context *ctx;
1202
1203 #define CHK(test, flag) do { \
1204         if (*total_flags & (test))              \
1205                 filter_or |= (flag);            \
1206         else                                    \
1207                 filter_nand |= (flag);          \
1208         } while (0)
1209
1210         IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
1211                         changed_flags, *total_flags);
1212
1213         CHK(FIF_OTHER_BSS | FIF_PROMISC_IN_BSS, RXON_FILTER_PROMISC_MSK);
1214         /* Setting _just_ RXON_FILTER_CTL2HOST_MSK causes FH errors */
1215         CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_PROMISC_MSK);
1216         CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
1217
1218 #undef CHK
1219
1220         mutex_lock(&priv->shrd->mutex);
1221
1222         for_each_context(priv, ctx) {
1223                 ctx->staging.filter_flags &= ~filter_nand;
1224                 ctx->staging.filter_flags |= filter_or;
1225
1226                 /*
1227                  * Not committing directly because hardware can perform a scan,
1228                  * but we'll eventually commit the filter flags change anyway.
1229                  */
1230         }
1231
1232         mutex_unlock(&priv->shrd->mutex);
1233
1234         /*
1235          * Receiving all multicast frames is always enabled by the
1236          * default flags setup in iwl_connection_init_rx_config()
1237          * since we currently do not support programming multicast
1238          * filters into the device.
1239          */
1240         *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
1241                         FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
1242 }
1243
1244 static void iwlagn_mac_flush(struct ieee80211_hw *hw, bool drop)
1245 {
1246         struct iwl_priv *priv = hw->priv;
1247
1248         mutex_lock(&priv->shrd->mutex);
1249         IWL_DEBUG_MAC80211(priv, "enter\n");
1250
1251         if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status)) {
1252                 IWL_DEBUG_TX(priv, "Aborting flush due to device shutdown\n");
1253                 goto done;
1254         }
1255         if (iwl_is_rfkill(priv->shrd)) {
1256                 IWL_DEBUG_TX(priv, "Aborting flush due to RF Kill\n");
1257                 goto done;
1258         }
1259
1260         /*
1261          * mac80211 will not push any more frames for transmit
1262          * until the flush is completed
1263          */
1264         if (drop) {
1265                 IWL_DEBUG_MAC80211(priv, "send flush command\n");
1266                 if (iwlagn_txfifo_flush(priv, IWL_DROP_ALL)) {
1267                         IWL_ERR(priv, "flush request fail\n");
1268                         goto done;
1269                 }
1270         }
1271         IWL_DEBUG_MAC80211(priv, "wait transmit/flush all frames\n");
1272         iwl_trans_wait_tx_queue_empty(trans(priv));
1273 done:
1274         mutex_unlock(&priv->shrd->mutex);
1275         IWL_DEBUG_MAC80211(priv, "leave\n");
1276 }
1277
1278 static int iwlagn_mac_remain_on_channel(struct ieee80211_hw *hw,
1279                                      struct ieee80211_channel *channel,
1280                                      enum nl80211_channel_type channel_type,
1281                                      int duration)
1282 {
1283         struct iwl_priv *priv = hw->priv;
1284         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_PAN];
1285         int err = 0;
1286
1287         if (!(priv->shrd->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
1288                 return -EOPNOTSUPP;
1289
1290         if (!(ctx->interface_modes & BIT(NL80211_IFTYPE_P2P_CLIENT)))
1291                 return -EOPNOTSUPP;
1292
1293         IWL_DEBUG_MAC80211(priv, "enter\n");
1294         mutex_lock(&priv->shrd->mutex);
1295
1296         if (test_bit(STATUS_SCAN_HW, &priv->shrd->status)) {
1297                 err = -EBUSY;
1298                 goto out;
1299         }
1300
1301         priv->hw_roc_channel = channel;
1302         priv->hw_roc_chantype = channel_type;
1303         priv->hw_roc_duration = duration;
1304         priv->hw_roc_start_notified = false;
1305         cancel_delayed_work(&priv->hw_roc_disable_work);
1306
1307         if (!ctx->is_active) {
1308                 static const struct iwl_qos_info default_qos_data = {
1309                         .def_qos_parm = {
1310                                 .ac[0] = {
1311                                         .cw_min = cpu_to_le16(3),
1312                                         .cw_max = cpu_to_le16(7),
1313                                         .aifsn = 2,
1314                                         .edca_txop = cpu_to_le16(1504),
1315                                 },
1316                                 .ac[1] = {
1317                                         .cw_min = cpu_to_le16(7),
1318                                         .cw_max = cpu_to_le16(15),
1319                                         .aifsn = 2,
1320                                         .edca_txop = cpu_to_le16(3008),
1321                                 },
1322                                 .ac[2] = {
1323                                         .cw_min = cpu_to_le16(15),
1324                                         .cw_max = cpu_to_le16(1023),
1325                                         .aifsn = 3,
1326                                 },
1327                                 .ac[3] = {
1328                                         .cw_min = cpu_to_le16(15),
1329                                         .cw_max = cpu_to_le16(1023),
1330                                         .aifsn = 7,
1331                                 },
1332                         },
1333                 };
1334
1335                 ctx->is_active = true;
1336                 ctx->qos_data = default_qos_data;
1337                 ctx->staging.dev_type = RXON_DEV_TYPE_P2P;
1338                 memcpy(ctx->staging.node_addr,
1339                        priv->contexts[IWL_RXON_CTX_BSS].staging.node_addr,
1340                        ETH_ALEN);
1341                 memcpy(ctx->staging.bssid_addr,
1342                        priv->contexts[IWL_RXON_CTX_BSS].staging.node_addr,
1343                        ETH_ALEN);
1344                 err = iwlagn_commit_rxon(priv, ctx);
1345                 if (err)
1346                         goto out;
1347                 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK |
1348                                              RXON_FILTER_PROMISC_MSK |
1349                                              RXON_FILTER_CTL2HOST_MSK;
1350
1351                 err = iwlagn_commit_rxon(priv, ctx);
1352                 if (err) {
1353                         iwlagn_disable_roc(priv);
1354                         goto out;
1355                 }
1356                 priv->hw_roc_setup = true;
1357         }
1358
1359         err = iwl_scan_initiate(priv, ctx->vif, IWL_SCAN_ROC, channel->band);
1360         if (err)
1361                 iwlagn_disable_roc(priv);
1362
1363  out:
1364         mutex_unlock(&priv->shrd->mutex);
1365         IWL_DEBUG_MAC80211(priv, "leave\n");
1366
1367         return err;
1368 }
1369
1370 static int iwlagn_mac_cancel_remain_on_channel(struct ieee80211_hw *hw)
1371 {
1372         struct iwl_priv *priv = hw->priv;
1373
1374         if (!(priv->shrd->valid_contexts & BIT(IWL_RXON_CTX_PAN)))
1375                 return -EOPNOTSUPP;
1376
1377         IWL_DEBUG_MAC80211(priv, "enter\n");
1378         mutex_lock(&priv->shrd->mutex);
1379         iwl_scan_cancel_timeout(priv, priv->hw_roc_duration);
1380         iwlagn_disable_roc(priv);
1381         mutex_unlock(&priv->shrd->mutex);
1382         IWL_DEBUG_MAC80211(priv, "leave\n");
1383
1384         return 0;
1385 }
1386
1387 static int iwlagn_mac_tx_sync(struct ieee80211_hw *hw,
1388                               struct ieee80211_vif *vif,
1389                               const u8 *bssid,
1390                               enum ieee80211_tx_sync_type type)
1391 {
1392         struct iwl_priv *priv = hw->priv;
1393         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1394         struct iwl_rxon_context *ctx = vif_priv->ctx;
1395         int ret;
1396         u8 sta_id;
1397
1398         IWL_DEBUG_MAC80211(priv, "enter\n");
1399         mutex_lock(&priv->shrd->mutex);
1400
1401         if (iwl_is_associated_ctx(ctx)) {
1402                 ret = 0;
1403                 goto out;
1404         }
1405
1406         if (ctx->preauth_bssid || test_bit(STATUS_SCAN_HW,
1407             &priv->shrd->status)) {
1408                 ret = -EBUSY;
1409                 goto out;
1410         }
1411
1412         ret = iwl_add_station_common(priv, ctx, bssid, true, NULL, &sta_id);
1413         if (ret)
1414                 goto out;
1415
1416         if (WARN_ON(sta_id != ctx->ap_sta_id)) {
1417                 ret = -EIO;
1418                 goto out_remove_sta;
1419         }
1420
1421         memcpy(ctx->bssid, bssid, ETH_ALEN);
1422         ctx->preauth_bssid = true;
1423
1424         ret = iwlagn_commit_rxon(priv, ctx);
1425
1426         if (ret == 0)
1427                 goto out;
1428
1429  out_remove_sta:
1430         iwl_remove_station(priv, sta_id, bssid);
1431  out:
1432         mutex_unlock(&priv->shrd->mutex);
1433         IWL_DEBUG_MAC80211(priv, "leave\n");
1434
1435         return ret;
1436 }
1437
1438 static void iwlagn_mac_finish_tx_sync(struct ieee80211_hw *hw,
1439                                    struct ieee80211_vif *vif,
1440                                    const u8 *bssid,
1441                                    enum ieee80211_tx_sync_type type)
1442 {
1443         struct iwl_priv *priv = hw->priv;
1444         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1445         struct iwl_rxon_context *ctx = vif_priv->ctx;
1446
1447         IWL_DEBUG_MAC80211(priv, "enter\n");
1448         mutex_lock(&priv->shrd->mutex);
1449
1450         if (iwl_is_associated_ctx(ctx))
1451                 goto out;
1452
1453         iwl_remove_station(priv, ctx->ap_sta_id, bssid);
1454         ctx->preauth_bssid = false;
1455         /* no need to commit */
1456  out:
1457         mutex_unlock(&priv->shrd->mutex);
1458         IWL_DEBUG_MAC80211(priv, "leave\n");
1459 }
1460
1461 static void iwlagn_mac_rssi_callback(struct ieee80211_hw *hw,
1462                            enum ieee80211_rssi_event rssi_event)
1463 {
1464         struct iwl_priv *priv = hw->priv;
1465
1466         IWL_DEBUG_MAC80211(priv, "enter\n");
1467         mutex_lock(&priv->shrd->mutex);
1468
1469         if (priv->cfg->bt_params &&
1470                         priv->cfg->bt_params->advanced_bt_coexist) {
1471                 if (rssi_event == RSSI_EVENT_LOW)
1472                         priv->bt_enable_pspoll = true;
1473                 else if (rssi_event == RSSI_EVENT_HIGH)
1474                         priv->bt_enable_pspoll = false;
1475
1476                 iwlagn_send_advance_bt_config(priv);
1477         } else {
1478                 IWL_DEBUG_MAC80211(priv, "Advanced BT coex disabled,"
1479                                 "ignoring RSSI callback\n");
1480         }
1481
1482         mutex_unlock(&priv->shrd->mutex);
1483         IWL_DEBUG_MAC80211(priv, "leave\n");
1484 }
1485
1486 static int iwlagn_mac_set_tim(struct ieee80211_hw *hw,
1487                            struct ieee80211_sta *sta, bool set)
1488 {
1489         struct iwl_priv *priv = hw->priv;
1490
1491         queue_work(priv->shrd->workqueue, &priv->beacon_update);
1492
1493         return 0;
1494 }
1495
1496 static int iwlagn_mac_conf_tx(struct ieee80211_hw *hw,
1497                     struct ieee80211_vif *vif, u16 queue,
1498                     const struct ieee80211_tx_queue_params *params)
1499 {
1500         struct iwl_priv *priv = hw->priv;
1501         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1502         struct iwl_rxon_context *ctx = vif_priv->ctx;
1503         unsigned long flags;
1504         int q;
1505
1506         if (WARN_ON(!ctx))
1507                 return -EINVAL;
1508
1509         IWL_DEBUG_MAC80211(priv, "enter\n");
1510
1511         if (!iwl_is_ready_rf(priv->shrd)) {
1512                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1513                 return -EIO;
1514         }
1515
1516         if (queue >= AC_NUM) {
1517                 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1518                 return 0;
1519         }
1520
1521         q = AC_NUM - 1 - queue;
1522
1523         spin_lock_irqsave(&priv->shrd->lock, flags);
1524
1525         ctx->qos_data.def_qos_parm.ac[q].cw_min =
1526                 cpu_to_le16(params->cw_min);
1527         ctx->qos_data.def_qos_parm.ac[q].cw_max =
1528                 cpu_to_le16(params->cw_max);
1529         ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1530         ctx->qos_data.def_qos_parm.ac[q].edca_txop =
1531                         cpu_to_le16((params->txop * 32));
1532
1533         ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1534
1535         spin_unlock_irqrestore(&priv->shrd->lock, flags);
1536
1537         IWL_DEBUG_MAC80211(priv, "leave\n");
1538         return 0;
1539 }
1540
1541 static int iwlagn_mac_tx_last_beacon(struct ieee80211_hw *hw)
1542 {
1543         struct iwl_priv *priv = hw->priv;
1544
1545         return priv->ibss_manager == IWL_IBSS_MANAGER;
1546 }
1547
1548 static int iwl_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1549 {
1550         iwl_connection_init_rx_config(priv, ctx);
1551
1552         iwlagn_set_rxon_chain(priv, ctx);
1553
1554         return iwlagn_commit_rxon(priv, ctx);
1555 }
1556
1557 static int iwl_setup_interface(struct iwl_priv *priv,
1558                                struct iwl_rxon_context *ctx)
1559 {
1560         struct ieee80211_vif *vif = ctx->vif;
1561         int err;
1562
1563         lockdep_assert_held(&priv->shrd->mutex);
1564
1565         /*
1566          * This variable will be correct only when there's just
1567          * a single context, but all code using it is for hardware
1568          * that supports only one context.
1569          */
1570         priv->iw_mode = vif->type;
1571
1572         ctx->is_active = true;
1573
1574         err = iwl_set_mode(priv, ctx);
1575         if (err) {
1576                 if (!ctx->always_active)
1577                         ctx->is_active = false;
1578                 return err;
1579         }
1580
1581         if (priv->cfg->bt_params && priv->cfg->bt_params->advanced_bt_coexist &&
1582             vif->type == NL80211_IFTYPE_ADHOC) {
1583                 /*
1584                  * pretend to have high BT traffic as long as we
1585                  * are operating in IBSS mode, as this will cause
1586                  * the rate scaling etc. to behave as intended.
1587                  */
1588                 priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH;
1589         }
1590
1591         return 0;
1592 }
1593
1594 static int iwlagn_mac_add_interface(struct ieee80211_hw *hw,
1595                              struct ieee80211_vif *vif)
1596 {
1597         struct iwl_priv *priv = hw->priv;
1598         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1599         struct iwl_rxon_context *tmp, *ctx = NULL;
1600         int err;
1601         enum nl80211_iftype viftype = ieee80211_vif_type_p2p(vif);
1602
1603         IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n",
1604                            viftype, vif->addr);
1605
1606         cancel_delayed_work_sync(&priv->hw_roc_disable_work);
1607
1608         mutex_lock(&priv->shrd->mutex);
1609
1610         iwlagn_disable_roc(priv);
1611
1612         if (!iwl_is_ready_rf(priv->shrd)) {
1613                 IWL_WARN(priv, "Try to add interface when device not ready\n");
1614                 err = -EINVAL;
1615                 goto out;
1616         }
1617
1618         for_each_context(priv, tmp) {
1619                 u32 possible_modes =
1620                         tmp->interface_modes | tmp->exclusive_interface_modes;
1621
1622                 if (tmp->vif) {
1623                         /* check if this busy context is exclusive */
1624                         if (tmp->exclusive_interface_modes &
1625                                                 BIT(tmp->vif->type)) {
1626                                 err = -EINVAL;
1627                                 goto out;
1628                         }
1629                         continue;
1630                 }
1631
1632                 if (!(possible_modes & BIT(viftype)))
1633                         continue;
1634
1635                 /* have maybe usable context w/o interface */
1636                 ctx = tmp;
1637                 break;
1638         }
1639
1640         if (!ctx) {
1641                 err = -EOPNOTSUPP;
1642                 goto out;
1643         }
1644
1645         vif_priv->ctx = ctx;
1646         ctx->vif = vif;
1647
1648         err = iwl_setup_interface(priv, ctx);
1649         if (!err)
1650                 goto out;
1651
1652         ctx->vif = NULL;
1653         priv->iw_mode = NL80211_IFTYPE_STATION;
1654  out:
1655         mutex_unlock(&priv->shrd->mutex);
1656
1657         IWL_DEBUG_MAC80211(priv, "leave\n");
1658         return err;
1659 }
1660
1661 static void iwl_teardown_interface(struct iwl_priv *priv,
1662                                    struct ieee80211_vif *vif,
1663                                    bool mode_change)
1664 {
1665         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1666
1667         lockdep_assert_held(&priv->shrd->mutex);
1668
1669         if (priv->scan_vif == vif) {
1670                 iwl_scan_cancel_timeout(priv, 200);
1671                 iwl_force_scan_end(priv);
1672         }
1673
1674         if (!mode_change) {
1675                 iwl_set_mode(priv, ctx);
1676                 if (!ctx->always_active)
1677                         ctx->is_active = false;
1678         }
1679
1680         /*
1681          * When removing the IBSS interface, overwrite the
1682          * BT traffic load with the stored one from the last
1683          * notification, if any. If this is a device that
1684          * doesn't implement this, this has no effect since
1685          * both values are the same and zero.
1686          */
1687         if (vif->type == NL80211_IFTYPE_ADHOC)
1688                 priv->bt_traffic_load = priv->last_bt_traffic_load;
1689 }
1690
1691 static void iwlagn_mac_remove_interface(struct ieee80211_hw *hw,
1692                               struct ieee80211_vif *vif)
1693 {
1694         struct iwl_priv *priv = hw->priv;
1695         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1696
1697         IWL_DEBUG_MAC80211(priv, "enter\n");
1698
1699         mutex_lock(&priv->shrd->mutex);
1700
1701         if (WARN_ON(ctx->vif != vif)) {
1702                 struct iwl_rxon_context *tmp;
1703                 IWL_ERR(priv, "ctx->vif = %p, vif = %p\n", ctx->vif, vif);
1704                 for_each_context(priv, tmp)
1705                         IWL_ERR(priv, "\tID = %d:\tctx = %p\tctx->vif = %p\n",
1706                                 tmp->ctxid, tmp, tmp->vif);
1707         }
1708         ctx->vif = NULL;
1709
1710         iwl_teardown_interface(priv, vif, false);
1711
1712         mutex_unlock(&priv->shrd->mutex);
1713
1714         IWL_DEBUG_MAC80211(priv, "leave\n");
1715
1716 }
1717
1718 static int iwlagn_mac_change_interface(struct ieee80211_hw *hw,
1719                                 struct ieee80211_vif *vif,
1720                                 enum nl80211_iftype newtype, bool newp2p)
1721 {
1722         struct iwl_priv *priv = hw->priv;
1723         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1724         struct iwl_rxon_context *bss_ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1725         struct iwl_rxon_context *tmp;
1726         enum nl80211_iftype newviftype = newtype;
1727         u32 interface_modes;
1728         int err;
1729
1730         IWL_DEBUG_MAC80211(priv, "enter\n");
1731
1732         newtype = ieee80211_iftype_p2p(newtype, newp2p);
1733
1734         mutex_lock(&priv->shrd->mutex);
1735
1736         if (!ctx->vif || !iwl_is_ready_rf(priv->shrd)) {
1737                 /*
1738                  * Huh? But wait ... this can maybe happen when
1739                  * we're in the middle of a firmware restart!
1740                  */
1741                 err = -EBUSY;
1742                 goto out;
1743         }
1744
1745         interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes;
1746
1747         if (!(interface_modes & BIT(newtype))) {
1748                 err = -EBUSY;
1749                 goto out;
1750         }
1751
1752         /*
1753          * Refuse a change that should be done by moving from the PAN
1754          * context to the BSS context instead, if the BSS context is
1755          * available and can support the new interface type.
1756          */
1757         if (ctx->ctxid == IWL_RXON_CTX_PAN && !bss_ctx->vif &&
1758             (bss_ctx->interface_modes & BIT(newtype) ||
1759              bss_ctx->exclusive_interface_modes & BIT(newtype))) {
1760                 BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
1761                 err = -EBUSY;
1762                 goto out;
1763         }
1764
1765         if (ctx->exclusive_interface_modes & BIT(newtype)) {
1766                 for_each_context(priv, tmp) {
1767                         if (ctx == tmp)
1768                                 continue;
1769
1770                         if (!tmp->vif)
1771                                 continue;
1772
1773                         /*
1774                          * The current mode switch would be exclusive, but
1775                          * another context is active ... refuse the switch.
1776                          */
1777                         err = -EBUSY;
1778                         goto out;
1779                 }
1780         }
1781
1782         /* success */
1783         iwl_teardown_interface(priv, vif, true);
1784         vif->type = newviftype;
1785         vif->p2p = newp2p;
1786         err = iwl_setup_interface(priv, ctx);
1787         WARN_ON(err);
1788         /*
1789          * We've switched internally, but submitting to the
1790          * device may have failed for some reason. Mask this
1791          * error, because otherwise mac80211 will not switch
1792          * (and set the interface type back) and we'll be
1793          * out of sync with it.
1794          */
1795         err = 0;
1796
1797  out:
1798         mutex_unlock(&priv->shrd->mutex);
1799         IWL_DEBUG_MAC80211(priv, "leave\n");
1800
1801         return err;
1802 }
1803
1804 static int iwlagn_mac_hw_scan(struct ieee80211_hw *hw,
1805                     struct ieee80211_vif *vif,
1806                     struct cfg80211_scan_request *req)
1807 {
1808         struct iwl_priv *priv = hw->priv;
1809         int ret;
1810
1811         IWL_DEBUG_MAC80211(priv, "enter\n");
1812
1813         if (req->n_channels == 0)
1814                 return -EINVAL;
1815
1816         mutex_lock(&priv->shrd->mutex);
1817
1818         /*
1819          * If an internal scan is in progress, just set
1820          * up the scan_request as per above.
1821          */
1822         if (priv->scan_type != IWL_SCAN_NORMAL) {
1823                 IWL_DEBUG_SCAN(priv,
1824                                "SCAN request during internal scan - defer\n");
1825                 priv->scan_request = req;
1826                 priv->scan_vif = vif;
1827                 ret = 0;
1828         } else {
1829                 priv->scan_request = req;
1830                 priv->scan_vif = vif;
1831                 /*
1832                  * mac80211 will only ask for one band at a time
1833                  * so using channels[0] here is ok
1834                  */
1835                 ret = iwl_scan_initiate(priv, vif, IWL_SCAN_NORMAL,
1836                                         req->channels[0]->band);
1837                 if (ret) {
1838                         priv->scan_request = NULL;
1839                         priv->scan_vif = NULL;
1840                 }
1841         }
1842
1843         IWL_DEBUG_MAC80211(priv, "leave\n");
1844
1845         mutex_unlock(&priv->shrd->mutex);
1846
1847         return ret;
1848 }
1849
1850 static int iwlagn_mac_sta_remove(struct ieee80211_hw *hw,
1851                        struct ieee80211_vif *vif,
1852                        struct ieee80211_sta *sta)
1853 {
1854         struct iwl_priv *priv = hw->priv;
1855         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
1856         int ret;
1857
1858         IWL_DEBUG_MAC80211(priv, "enter: received request to remove "
1859                            "station %pM\n", sta->addr);
1860         mutex_lock(&priv->shrd->mutex);
1861         IWL_DEBUG_INFO(priv, "proceeding to remove station %pM\n",
1862                         sta->addr);
1863         ret = iwl_remove_station(priv, sta_priv->sta_id, sta->addr);
1864         if (ret)
1865                 IWL_DEBUG_QUIET_RFKILL(priv, "Error removing station %pM\n",
1866                         sta->addr);
1867         mutex_unlock(&priv->shrd->mutex);
1868         IWL_DEBUG_MAC80211(priv, "leave\n");
1869
1870         return ret;
1871 }
1872
1873 static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
1874 {
1875         unsigned long flags;
1876
1877         spin_lock_irqsave(&priv->shrd->sta_lock, flags);
1878         priv->stations[sta_id].sta.station_flags &= ~STA_FLG_PWR_SAVE_MSK;
1879         priv->stations[sta_id].sta.station_flags_msk = STA_FLG_PWR_SAVE_MSK;
1880         priv->stations[sta_id].sta.sta.modify_mask = 0;
1881         priv->stations[sta_id].sta.sleep_tx_count = 0;
1882         priv->stations[sta_id].sta.mode = STA_CONTROL_MODIFY_MSK;
1883         iwl_send_add_sta(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
1884         spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
1885
1886 }
1887
1888 static void iwlagn_mac_sta_notify(struct ieee80211_hw *hw,
1889                            struct ieee80211_vif *vif,
1890                            enum sta_notify_cmd cmd,
1891                            struct ieee80211_sta *sta)
1892 {
1893         struct iwl_priv *priv = hw->priv;
1894         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
1895         int sta_id;
1896
1897         IWL_DEBUG_MAC80211(priv, "enter\n");
1898
1899         switch (cmd) {
1900         case STA_NOTIFY_SLEEP:
1901                 WARN_ON(!sta_priv->client);
1902                 sta_priv->asleep = true;
1903                 if (atomic_read(&sta_priv->pending_frames) > 0)
1904                         ieee80211_sta_block_awake(hw, sta, true);
1905                 break;
1906         case STA_NOTIFY_AWAKE:
1907                 WARN_ON(!sta_priv->client);
1908                 if (!sta_priv->asleep)
1909                         break;
1910                 sta_priv->asleep = false;
1911                 sta_id = iwl_sta_id(sta);
1912                 if (sta_id != IWL_INVALID_STATION)
1913                         iwl_sta_modify_ps_wake(priv, sta_id);
1914                 break;
1915         default:
1916                 break;
1917         }
1918         IWL_DEBUG_MAC80211(priv, "leave\n");
1919 }
1920
1921 struct ieee80211_ops iwlagn_hw_ops = {
1922         .tx = iwlagn_mac_tx,
1923         .start = iwlagn_mac_start,
1924         .stop = iwlagn_mac_stop,
1925 #ifdef CONFIG_PM_SLEEP
1926         .suspend = iwlagn_mac_suspend,
1927         .resume = iwlagn_mac_resume,
1928 #endif
1929         .add_interface = iwlagn_mac_add_interface,
1930         .remove_interface = iwlagn_mac_remove_interface,
1931         .change_interface = iwlagn_mac_change_interface,
1932         .config = iwlagn_mac_config,
1933         .configure_filter = iwlagn_configure_filter,
1934         .set_key = iwlagn_mac_set_key,
1935         .update_tkip_key = iwlagn_mac_update_tkip_key,
1936         .set_rekey_data = iwlagn_mac_set_rekey_data,
1937         .conf_tx = iwlagn_mac_conf_tx,
1938         .bss_info_changed = iwlagn_bss_info_changed,
1939         .ampdu_action = iwlagn_mac_ampdu_action,
1940         .hw_scan = iwlagn_mac_hw_scan,
1941         .sta_notify = iwlagn_mac_sta_notify,
1942         .sta_add = iwlagn_mac_sta_add,
1943         .sta_remove = iwlagn_mac_sta_remove,
1944         .channel_switch = iwlagn_mac_channel_switch,
1945         .flush = iwlagn_mac_flush,
1946         .tx_last_beacon = iwlagn_mac_tx_last_beacon,
1947         .remain_on_channel = iwlagn_mac_remain_on_channel,
1948         .cancel_remain_on_channel = iwlagn_mac_cancel_remain_on_channel,
1949         .rssi_callback = iwlagn_mac_rssi_callback,
1950         CFG80211_TESTMODE_CMD(iwlagn_mac_testmode_cmd)
1951         CFG80211_TESTMODE_DUMP(iwlagn_mac_testmode_dump)
1952         .tx_sync = iwlagn_mac_tx_sync,
1953         .finish_tx_sync = iwlagn_mac_finish_tx_sync,
1954         .set_tim = iwlagn_mac_set_tim,
1955 };
1956
1957 /* This function both allocates and initializes hw and priv. */
1958 struct ieee80211_hw *iwl_alloc_all(void)
1959 {
1960         struct iwl_priv *priv;
1961         /* mac80211 allocates memory for this device instance, including
1962          *   space for this driver's private structure */
1963         struct ieee80211_hw *hw;
1964
1965         hw = ieee80211_alloc_hw(sizeof(struct iwl_priv), &iwlagn_hw_ops);
1966         if (!hw)
1967                 goto out;
1968
1969         priv = hw->priv;
1970         priv->hw = hw;
1971
1972 out:
1973         return hw;
1974 }