drivers/net/wireless/intel/iwlwifi/dvm/mac80211.c

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2014 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 <linuxwifi@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/slab.h>
  32 #include <linux/dma-mapping.h>
  33 #include <linux/delay.h>
  34 #include <linux/sched.h>
  35 #include <linux/skbuff.h>
  36 #include <linux/netdevice.h>
  37 #include <linux/etherdevice.h>
  38 #include <linux/if_arp.h>
  39
  40 #include <net/ieee80211_radiotap.h>
  41 #include <net/mac80211.h>
  42
  43 #include <asm/div64.h>
  44
  45 #include "iwl-io.h"
  46 #include "iwl-trans.h"
  47 #include "iwl-op-mode.h"
  48 #include "iwl-modparams.h"
  49
  50 #include "dev.h"
  51 #include "calib.h"
  52 #include "agn.h"
  53
  54 /*****************************************************************************
  55  *
  56  * mac80211 entry point functions
  57  *
  58  *****************************************************************************/
  59
  60 static const struct ieee80211_iface_limit iwlagn_sta_ap_limits[] = {
  61         {
  62                 .max = 1,
  63                 .types = BIT(NL80211_IFTYPE_STATION),
  64         },
  65         {
  66                 .max = 1,
  67                 .types = BIT(NL80211_IFTYPE_AP),
  68         },
  69 };
  70
  71 static const struct ieee80211_iface_limit iwlagn_2sta_limits[] = {
  72         {
  73                 .max = 2,
  74                 .types = BIT(NL80211_IFTYPE_STATION),
  75         },
  76 };
  77
  78 static const struct ieee80211_iface_combination
  79 iwlagn_iface_combinations_dualmode[] = {
  80         { .num_different_channels = 1,
  81           .max_interfaces = 2,
  82           .beacon_int_infra_match = true,
  83           .limits = iwlagn_sta_ap_limits,
  84           .n_limits = ARRAY_SIZE(iwlagn_sta_ap_limits),
  85         },
  86         { .num_different_channels = 1,
  87           .max_interfaces = 2,
  88           .limits = iwlagn_2sta_limits,
  89           .n_limits = ARRAY_SIZE(iwlagn_2sta_limits),
  90         },
  91 };
  92
  93 /*
  94  * Not a mac80211 entry point function, but it fits in with all the
  95  * other mac80211 functions grouped here.
  96  */
  97 int iwlagn_mac_setup_register(struct iwl_priv *priv,
  98                               const struct iwl_ucode_capabilities *capa)
  99 {
 100         int ret;
 101         struct ieee80211_hw *hw = priv->hw;
 102         struct iwl_rxon_context *ctx;
 103
 104         hw->rate_control_algorithm = "iwl-agn-rs";
 105
 106         /* Tell mac80211 our characteristics */
 107         ieee80211_hw_set(hw, SIGNAL_DBM);
 108         ieee80211_hw_set(hw, AMPDU_AGGREGATION);
 109         ieee80211_hw_set(hw, NEED_DTIM_BEFORE_ASSOC);
 110         ieee80211_hw_set(hw, SPECTRUM_MGMT);
 111         ieee80211_hw_set(hw, REPORTS_TX_ACK_STATUS);
 112         ieee80211_hw_set(hw, QUEUE_CONTROL);
 113         ieee80211_hw_set(hw, SUPPORTS_PS);
 114         ieee80211_hw_set(hw, SUPPORTS_DYNAMIC_PS);
 115         ieee80211_hw_set(hw, SUPPORT_FAST_XMIT);
 116         ieee80211_hw_set(hw, WANT_MONITOR_VIF);
 117
 118         if (priv->trans->max_skb_frags)
 119                 hw->netdev_features = NETIF_F_HIGHDMA | NETIF_F_SG;
 120
 121         hw->offchannel_tx_hw_queue = IWL_AUX_QUEUE;
 122         hw->radiotap_mcs_details |= IEEE80211_RADIOTAP_MCS_HAVE_FMT;
 123
 124         /*
 125          * Including the following line will crash some AP's.  This
 126          * workaround removes the stimulus which causes the crash until
 127          * the AP software can be fixed.
 128         hw->max_tx_aggregation_subframes = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
 129          */
 130
 131         if (priv->nvm_data->sku_cap_11n_enable)
 132                 hw->wiphy->features |= NL80211_FEATURE_DYNAMIC_SMPS |
 133                                        NL80211_FEATURE_STATIC_SMPS;
 134
 135         /*
 136          * Enable 11w if advertised by firmware and software crypto
 137          * is not enabled (as the firmware will interpret some mgmt
 138          * packets, so enabling it with software crypto isn't safe)
 139          */
 140         if (priv->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_MFP &&
 141             !iwlwifi_mod_params.sw_crypto)
 142                 ieee80211_hw_set(hw, MFP_CAPABLE);
 143
 144         hw->sta_data_size = sizeof(struct iwl_station_priv);
 145         hw->vif_data_size = sizeof(struct iwl_vif_priv);
 146
 147         for_each_context(priv, ctx) {
 148                 hw->wiphy->interface_modes |= ctx->interface_modes;
 149                 hw->wiphy->interface_modes |= ctx->exclusive_interface_modes;
 150         }
 151
 152         BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
 153
 154         if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
 155                 hw->wiphy->iface_combinations =
 156                         iwlagn_iface_combinations_dualmode;
 157                 hw->wiphy->n_iface_combinations =
 158                         ARRAY_SIZE(iwlagn_iface_combinations_dualmode);
 159         }
 160
 161         hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
 162         hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG |
 163                                        REGULATORY_DISABLE_BEACON_HINTS;
 164
 165 #ifdef CONFIG_PM_SLEEP
 166         if (priv->fw->img[IWL_UCODE_WOWLAN].sec[0].len &&
 167             priv->trans->ops->d3_suspend &&
 168             priv->trans->ops->d3_resume &&
 169             device_can_wakeup(priv->trans->dev)) {
 170                 priv->wowlan_support.flags = WIPHY_WOWLAN_MAGIC_PKT |
 171                                              WIPHY_WOWLAN_DISCONNECT |
 172                                              WIPHY_WOWLAN_EAP_IDENTITY_REQ |
 173                                              WIPHY_WOWLAN_RFKILL_RELEASE;
 174                 if (!iwlwifi_mod_params.sw_crypto)
 175                         priv->wowlan_support.flags |=
 176                                 WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
 177                                 WIPHY_WOWLAN_GTK_REKEY_FAILURE;
 178
 179                 priv->wowlan_support.n_patterns = IWLAGN_WOWLAN_MAX_PATTERNS;
 180                 priv->wowlan_support.pattern_min_len =
 181                                         IWLAGN_WOWLAN_MIN_PATTERN_LEN;
 182                 priv->wowlan_support.pattern_max_len =
 183                                         IWLAGN_WOWLAN_MAX_PATTERN_LEN;
 184                 hw->wiphy->wowlan = &priv->wowlan_support;
 185         }
 186 #endif
 187
 188         if (iwlwifi_mod_params.power_save)
 189                 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
 190         else
 191                 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
 192
 193         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
 194         /* we create the 802.11 header and a max-length SSID element */
 195         hw->wiphy->max_scan_ie_len = capa->max_probe_length - 24 - 34;
 196
 197         /*
 198          * We don't use all queues: 4 and 9 are unused and any
 199          * aggregation queue gets mapped down to the AC queue.
 200          */
 201         hw->queues = IWLAGN_FIRST_AMPDU_QUEUE;
 202
 203         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
 204
 205         if (priv->nvm_data->bands[NL80211_BAND_2GHZ].n_channels)
 206                 priv->hw->wiphy->bands[NL80211_BAND_2GHZ] =
 207                         &priv->nvm_data->bands[NL80211_BAND_2GHZ];
 208         if (priv->nvm_data->bands[NL80211_BAND_5GHZ].n_channels)
 209                 priv->hw->wiphy->bands[NL80211_BAND_5GHZ] =
 210                         &priv->nvm_data->bands[NL80211_BAND_5GHZ];
 211
 212         hw->wiphy->hw_version = priv->trans->hw_id;
 213
 214         iwl_leds_init(priv);
 215
 216         ret = ieee80211_register_hw(priv->hw);
 217         if (ret) {
 218                 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
 219                 iwl_leds_exit(priv);
 220                 return ret;
 221         }
 222         priv->mac80211_registered = 1;
 223
 224         return 0;
 225 }
 226
 227 void iwlagn_mac_unregister(struct iwl_priv *priv)
 228 {
 229         if (!priv->mac80211_registered)
 230                 return;
 231         iwl_leds_exit(priv);
 232         ieee80211_unregister_hw(priv->hw);
 233         priv->mac80211_registered = 0;
 234 }
 235
 236 static int __iwl_up(struct iwl_priv *priv)
 237 {
 238         struct iwl_rxon_context *ctx;
 239         int ret;
 240
 241         lockdep_assert_held(&priv->mutex);
 242
 243         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
 244                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
 245                 return -EIO;
 246         }
 247
 248         for_each_context(priv, ctx) {
 249                 ret = iwlagn_alloc_bcast_station(priv, ctx);
 250                 if (ret) {
 251                         iwl_dealloc_bcast_stations(priv);
 252                         return ret;
 253                 }
 254         }
 255
 256         ret = iwl_trans_start_hw(priv->trans);
 257         if (ret) {
 258                 IWL_ERR(priv, "Failed to start HW: %d\n", ret);
 259                 goto error;
 260         }
 261
 262         ret = iwl_run_init_ucode(priv);
 263         if (ret) {
 264                 IWL_ERR(priv, "Failed to run INIT ucode: %d\n", ret);
 265                 goto error;
 266         }
 267
 268         ret = iwl_trans_start_hw(priv->trans);
 269         if (ret) {
 270                 IWL_ERR(priv, "Failed to start HW: %d\n", ret);
 271                 goto error;
 272         }
 273
 274         ret = iwl_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->status);
 287         iwl_down(priv);
 288         clear_bit(STATUS_EXIT_PENDING, &priv->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 = IWL_MAC80211_GET_DVM(hw);
 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->mutex);
 303         ret = __iwl_up(priv);
 304         mutex_unlock(&priv->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->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 = IWL_MAC80211_GET_DVM(hw);
 324
 325         IWL_DEBUG_MAC80211(priv, "enter\n");
 326
 327         if (!priv->is_open)
 328                 return;
 329
 330         priv->is_open = 0;
 331
 332         mutex_lock(&priv->mutex);
 333         iwl_down(priv);
 334         mutex_unlock(&priv->mutex);
 335
 336         iwl_cancel_deferred_work(priv);
 337
 338         flush_workqueue(priv->workqueue);
 339
 340         IWL_DEBUG_MAC80211(priv, "leave\n");
 341 }
 342
 343 static void iwlagn_mac_set_rekey_data(struct ieee80211_hw *hw,
 344                                       struct ieee80211_vif *vif,
 345                                       struct cfg80211_gtk_rekey_data *data)
 346 {
 347         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 348
 349         if (iwlwifi_mod_params.sw_crypto)
 350                 return;
 351
 352         IWL_DEBUG_MAC80211(priv, "enter\n");
 353         mutex_lock(&priv->mutex);
 354
 355         if (priv->contexts[IWL_RXON_CTX_BSS].vif != vif)
 356                 goto out;
 357
 358         memcpy(priv->kek, data->kek, NL80211_KEK_LEN);
 359         memcpy(priv->kck, data->kck, NL80211_KCK_LEN);
 360         priv->replay_ctr =
 361                 cpu_to_le64(be64_to_cpup((__be64 *)&data->replay_ctr));
 362         priv->have_rekey_data = true;
 363
 364  out:
 365         mutex_unlock(&priv->mutex);
 366         IWL_DEBUG_MAC80211(priv, "leave\n");
 367 }
 368
 369 #ifdef CONFIG_PM_SLEEP
 370
 371 static int iwlagn_mac_suspend(struct ieee80211_hw *hw,
 372                               struct cfg80211_wowlan *wowlan)
 373 {
 374         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 375         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 376         int ret;
 377
 378         if (WARN_ON(!wowlan))
 379                 return -EINVAL;
 380
 381         IWL_DEBUG_MAC80211(priv, "enter\n");
 382         mutex_lock(&priv->mutex);
 383
 384         /* Don't attempt WoWLAN when not associated, tear down instead. */
 385         if (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION ||
 386             !iwl_is_associated_ctx(ctx)) {
 387                 ret = 1;
 388                 goto out;
 389         }
 390
 391         ret = iwlagn_suspend(priv, wowlan);
 392         if (ret)
 393                 goto error;
 394
 395         /* let the ucode operate on its own */
 396         iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_SET,
 397                     CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE);
 398
 399         iwl_trans_d3_suspend(priv->trans, false, true);
 400
 401         goto out;
 402
 403  error:
 404         priv->wowlan = false;
 405         iwlagn_prepare_restart(priv);
 406         ieee80211_restart_hw(priv->hw);
 407  out:
 408         mutex_unlock(&priv->mutex);
 409         IWL_DEBUG_MAC80211(priv, "leave\n");
 410
 411         return ret;
 412 }
 413
 414 struct iwl_resume_data {
 415         struct iwl_priv *priv;
 416         struct iwlagn_wowlan_status *cmd;
 417         bool valid;
 418 };
 419
 420 static bool iwl_resume_status_fn(struct iwl_notif_wait_data *notif_wait,
 421                                  struct iwl_rx_packet *pkt, void *data)
 422 {
 423         struct iwl_resume_data *resume_data = data;
 424         struct iwl_priv *priv = resume_data->priv;
 425
 426         if (iwl_rx_packet_payload_len(pkt) != sizeof(*resume_data->cmd)) {
 427                 IWL_ERR(priv, "rx wrong size data\n");
 428                 return true;
 429         }
 430         memcpy(resume_data->cmd, pkt->data, sizeof(*resume_data->cmd));
 431         resume_data->valid = true;
 432
 433         return true;
 434 }
 435
 436 static int iwlagn_mac_resume(struct ieee80211_hw *hw)
 437 {
 438         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 439         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 440         struct ieee80211_vif *vif;
 441         u32 base;
 442         int ret;
 443         enum iwl_d3_status d3_status;
 444         struct error_table_start {
 445                 /* cf. struct iwl_error_event_table */
 446                 u32 valid;
 447                 u32 error_id;
 448         } err_info;
 449         struct iwl_notification_wait status_wait;
 450         static const u16 status_cmd[] = {
 451                 REPLY_WOWLAN_GET_STATUS,
 452         };
 453         struct iwlagn_wowlan_status status_data = {};
 454         struct iwl_resume_data resume_data = {
 455                 .priv = priv,
 456                 .cmd = &status_data,
 457                 .valid = false,
 458         };
 459         struct cfg80211_wowlan_wakeup wakeup = {
 460                 .pattern_idx = -1,
 461         };
 462 #ifdef CONFIG_IWLWIFI_DEBUGFS
 463         const struct fw_img *img;
 464 #endif
 465
 466         IWL_DEBUG_MAC80211(priv, "enter\n");
 467         mutex_lock(&priv->mutex);
 468
 469         /* we'll clear ctx->vif during iwlagn_prepare_restart() */
 470         vif = ctx->vif;
 471
 472         ret = iwl_trans_d3_resume(priv->trans, &d3_status, false, true);
 473         if (ret)
 474                 goto out_unlock;
 475
 476         if (d3_status != IWL_D3_STATUS_ALIVE) {
 477                 IWL_INFO(priv, "Device was reset during suspend\n");
 478                 goto out_unlock;
 479         }
 480
 481         /* uCode is no longer operating by itself */
 482         iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_CLR,
 483                     CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE);
 484
 485         base = priv->device_pointers.error_event_table;
 486         if (!iwlagn_hw_valid_rtc_data_addr(base)) {
 487                 IWL_WARN(priv, "Invalid error table during resume!\n");
 488                 goto out_unlock;
 489         }
 490
 491         iwl_trans_read_mem_bytes(priv->trans, base,
 492                                  &err_info, sizeof(err_info));
 493
 494         if (err_info.valid) {
 495                 IWL_INFO(priv, "error table is valid (%d, 0x%x)\n",
 496                          err_info.valid, err_info.error_id);
 497                 if (err_info.error_id == RF_KILL_INDICATOR_FOR_WOWLAN) {
 498                         wakeup.rfkill_release = true;
 499                         ieee80211_report_wowlan_wakeup(vif, &wakeup,
 500                                                        GFP_KERNEL);
 501                 }
 502                 goto out_unlock;
 503         }
 504
 505 #ifdef CONFIG_IWLWIFI_DEBUGFS
 506         img = &priv->fw->img[IWL_UCODE_WOWLAN];
 507         if (!priv->wowlan_sram)
 508                 priv->wowlan_sram =
 509                         kzalloc(img->sec[IWL_UCODE_SECTION_DATA].len,
 510                                 GFP_KERNEL);
 511
 512         if (priv->wowlan_sram)
 513                 iwl_trans_read_mem(priv->trans, 0x800000,
 514                                    priv->wowlan_sram,
 515                                    img->sec[IWL_UCODE_SECTION_DATA].len / 4);
 516 #endif
 517
 518         /*
 519          * This is very strange. The GET_STATUS command is sent but the device
 520          * doesn't reply properly, it seems it doesn't close the RBD so one is
 521          * always left open ... As a result, we need to send another command
 522          * and have to reset the driver afterwards. As we need to switch to
 523          * runtime firmware again that'll happen.
 524          */
 525
 526         iwl_init_notification_wait(&priv->notif_wait, &status_wait, status_cmd,
 527                                    ARRAY_SIZE(status_cmd), iwl_resume_status_fn,
 528                                    &resume_data);
 529
 530         iwl_dvm_send_cmd_pdu(priv, REPLY_WOWLAN_GET_STATUS, CMD_ASYNC, 0, NULL);
 531         iwl_dvm_send_cmd_pdu(priv, REPLY_ECHO, CMD_ASYNC, 0, NULL);
 532         /* an RBD is left open in the firmware now! */
 533
 534         ret = iwl_wait_notification(&priv->notif_wait, &status_wait, HZ/5);
 535         if (ret)
 536                 goto out_unlock;
 537
 538         if (resume_data.valid && priv->contexts[IWL_RXON_CTX_BSS].vif) {
 539                 u32 reasons = le32_to_cpu(status_data.wakeup_reason);
 540                 struct cfg80211_wowlan_wakeup *wakeup_report;
 541
 542                 IWL_INFO(priv, "WoWLAN wakeup reason(s): 0x%.8x\n", reasons);
 543
 544                 if (reasons) {
 545                         if (reasons & IWLAGN_WOWLAN_WAKEUP_MAGIC_PACKET)
 546                                 wakeup.magic_pkt = true;
 547                         if (reasons & IWLAGN_WOWLAN_WAKEUP_PATTERN_MATCH)
 548                                 wakeup.pattern_idx = status_data.pattern_number;
 549                         if (reasons & (IWLAGN_WOWLAN_WAKEUP_BEACON_MISS |
 550                                        IWLAGN_WOWLAN_WAKEUP_LINK_CHANGE))
 551                                 wakeup.disconnect = true;
 552                         if (reasons & IWLAGN_WOWLAN_WAKEUP_GTK_REKEY_FAIL)
 553                                 wakeup.gtk_rekey_failure = true;
 554                         if (reasons & IWLAGN_WOWLAN_WAKEUP_EAP_IDENT_REQ)
 555                                 wakeup.eap_identity_req = true;
 556                         if (reasons & IWLAGN_WOWLAN_WAKEUP_4WAY_HANDSHAKE)
 557                                 wakeup.four_way_handshake = true;
 558                         wakeup_report = &wakeup;
 559                 } else {
 560                         wakeup_report = NULL;
 561                 }
 562
 563                 ieee80211_report_wowlan_wakeup(vif, wakeup_report, GFP_KERNEL);
 564         }
 565
 566         priv->wowlan = false;
 567
 568         iwlagn_prepare_restart(priv);
 569
 570         memset((void *)&ctx->active, 0, sizeof(ctx->active));
 571         iwl_connection_init_rx_config(priv, ctx);
 572         iwlagn_set_rxon_chain(priv, ctx);
 573
 574  out_unlock:
 575         mutex_unlock(&priv->mutex);
 576         IWL_DEBUG_MAC80211(priv, "leave\n");
 577
 578         ieee80211_resume_disconnect(vif);
 579
 580         return 1;
 581 }
 582
 583 static void iwlagn_mac_set_wakeup(struct ieee80211_hw *hw, bool enabled)
 584 {
 585         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 586
 587         device_set_wakeup_enable(priv->trans->dev, enabled);
 588 }
 589 #endif
 590
 591 static void iwlagn_mac_tx(struct ieee80211_hw *hw,
 592                           struct ieee80211_tx_control *control,
 593                           struct sk_buff *skb)
 594 {
 595         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 596
 597         if (iwlagn_tx_skb(priv, control->sta, skb))
 598                 ieee80211_free_txskb(hw, skb);
 599 }
 600
 601 static void iwlagn_mac_update_tkip_key(struct ieee80211_hw *hw,
 602                                        struct ieee80211_vif *vif,
 603                                        struct ieee80211_key_conf *keyconf,
 604                                        struct ieee80211_sta *sta,
 605                                        u32 iv32, u16 *phase1key)
 606 {
 607         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 608
 609         iwl_update_tkip_key(priv, vif, keyconf, sta, iv32, phase1key);
 610 }
 611
 612 static int iwlagn_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
 613                               struct ieee80211_vif *vif,
 614                               struct ieee80211_sta *sta,
 615                               struct ieee80211_key_conf *key)
 616 {
 617         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 618         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
 619         struct iwl_rxon_context *ctx = vif_priv->ctx;
 620         int ret;
 621         bool is_default_wep_key = false;
 622
 623         IWL_DEBUG_MAC80211(priv, "enter\n");
 624
 625         if (iwlwifi_mod_params.sw_crypto) {
 626                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
 627                 return -EOPNOTSUPP;
 628         }
 629
 630         switch (key->cipher) {
 631         case WLAN_CIPHER_SUITE_TKIP:
 632                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
 633                 /* fall through */
 634         case WLAN_CIPHER_SUITE_CCMP:
 635                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 636                 break;
 637         default:
 638                 break;
 639         }
 640
 641         /*
 642          * We could program these keys into the hardware as well, but we
 643          * don't expect much multicast traffic in IBSS and having keys
 644          * for more stations is probably more useful.
 645          *
 646          * Mark key TX-only and return 0.
 647          */
 648         if (vif->type == NL80211_IFTYPE_ADHOC &&
 649             !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
 650                 key->hw_key_idx = WEP_INVALID_OFFSET;
 651                 return 0;
 652         }
 653
 654         /* If they key was TX-only, accept deletion */
 655         if (cmd == DISABLE_KEY && key->hw_key_idx == WEP_INVALID_OFFSET)
 656                 return 0;
 657
 658         mutex_lock(&priv->mutex);
 659         iwl_scan_cancel_timeout(priv, 100);
 660
 661         BUILD_BUG_ON(WEP_INVALID_OFFSET == IWLAGN_HW_KEY_DEFAULT);
 662
 663         /*
 664          * If we are getting WEP group key and we didn't receive any key mapping
 665          * so far, we are in legacy wep mode (group key only), otherwise we are
 666          * in 1X mode.
 667          * In legacy wep mode, we use another host command to the uCode.
 668          */
 669         if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
 670              key->cipher == WLAN_CIPHER_SUITE_WEP104) && !sta) {
 671                 if (cmd == SET_KEY)
 672                         is_default_wep_key = !ctx->key_mapping_keys;
 673                 else
 674                         is_default_wep_key =
 675                                 key->hw_key_idx == IWLAGN_HW_KEY_DEFAULT;
 676         }
 677
 678
 679         switch (cmd) {
 680         case SET_KEY:
 681                 if (is_default_wep_key) {
 682                         ret = iwl_set_default_wep_key(priv, vif_priv->ctx, key);
 683                         break;
 684                 }
 685                 ret = iwl_set_dynamic_key(priv, vif_priv->ctx, key, sta);
 686                 if (ret) {
 687                         /*
 688                          * can't add key for RX, but we don't need it
 689                          * in the device for TX so still return 0
 690                          */
 691                         ret = 0;
 692                         key->hw_key_idx = WEP_INVALID_OFFSET;
 693                 }
 694
 695                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
 696                 break;
 697         case DISABLE_KEY:
 698                 if (is_default_wep_key)
 699                         ret = iwl_remove_default_wep_key(priv, ctx, key);
 700                 else
 701                         ret = iwl_remove_dynamic_key(priv, ctx, key, sta);
 702
 703                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
 704                 break;
 705         default:
 706                 ret = -EINVAL;
 707         }
 708
 709         mutex_unlock(&priv->mutex);
 710         IWL_DEBUG_MAC80211(priv, "leave\n");
 711
 712         return ret;
 713 }
 714
 715 static inline bool iwl_enable_rx_ampdu(const struct iwl_cfg *cfg)
 716 {
 717         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
 718                 return false;
 719         return true;
 720 }
 721
 722 static inline bool iwl_enable_tx_ampdu(const struct iwl_cfg *cfg)
 723 {
 724         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
 725                 return false;
 726         if (iwlwifi_mod_params.disable_11n & IWL_ENABLE_HT_TXAGG)
 727                 return true;
 728
 729         /* disabled by default */
 730         return false;
 731 }
 732
 733 static int iwlagn_mac_ampdu_action(struct ieee80211_hw *hw,
 734                                    struct ieee80211_vif *vif,
 735                                    struct ieee80211_ampdu_params *params)
 736 {
 737         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 738         int ret = -EINVAL;
 739         struct ieee80211_sta *sta = params->sta;
 740         enum ieee80211_ampdu_mlme_action action = params->action;
 741         u16 tid = params->tid;
 742         u16 *ssn = &params->ssn;
 743         u8 buf_size = params->buf_size;
 744         struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;
 745
 746         IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n",
 747                      sta->addr, tid);
 748
 749         if (!(priv->nvm_data->sku_cap_11n_enable))
 750                 return -EACCES;
 751
 752         IWL_DEBUG_MAC80211(priv, "enter\n");
 753         mutex_lock(&priv->mutex);
 754
 755         switch (action) {
 756         case IEEE80211_AMPDU_RX_START:
 757                 if (!iwl_enable_rx_ampdu(priv->cfg))
 758                         break;
 759                 IWL_DEBUG_HT(priv, "start Rx\n");
 760                 ret = iwl_sta_rx_agg_start(priv, sta, tid, *ssn);
 761                 break;
 762         case IEEE80211_AMPDU_RX_STOP:
 763                 IWL_DEBUG_HT(priv, "stop Rx\n");
 764                 ret = iwl_sta_rx_agg_stop(priv, sta, tid);
 765                 break;
 766         case IEEE80211_AMPDU_TX_START:
 767                 if (!priv->trans->ops->txq_enable)
 768                         break;
 769                 if (!iwl_enable_tx_ampdu(priv->cfg))
 770                         break;
 771                 IWL_DEBUG_HT(priv, "start Tx\n");
 772                 ret = iwlagn_tx_agg_start(priv, vif, sta, tid, ssn);
 773                 break;
 774         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 775         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 776                 IWL_DEBUG_HT(priv, "Flush Tx\n");
 777                 ret = iwlagn_tx_agg_flush(priv, vif, sta, tid);
 778                 break;
 779         case IEEE80211_AMPDU_TX_STOP_CONT:
 780                 IWL_DEBUG_HT(priv, "stop Tx\n");
 781                 ret = iwlagn_tx_agg_stop(priv, vif, sta, tid);
 782                 if ((ret == 0) && (priv->agg_tids_count > 0)) {
 783                         priv->agg_tids_count--;
 784                         IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n",
 785                                      priv->agg_tids_count);
 786                 }
 787                 if (!priv->agg_tids_count &&
 788                     priv->hw_params.use_rts_for_aggregation) {
 789                         /*
 790                          * switch off RTS/CTS if it was previously enabled
 791                          */
 792                         sta_priv->lq_sta.lq.general_params.flags &=
 793                                 ~LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
 794                         iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif),
 795                                         &sta_priv->lq_sta.lq, CMD_ASYNC, false);
 796                 }
 797                 break;
 798         case IEEE80211_AMPDU_TX_OPERATIONAL:
 799                 ret = iwlagn_tx_agg_oper(priv, vif, sta, tid, buf_size);
 800                 break;
 801         }
 802         mutex_unlock(&priv->mutex);
 803         IWL_DEBUG_MAC80211(priv, "leave\n");
 804         return ret;
 805 }
 806
 807 static int iwlagn_mac_sta_add(struct ieee80211_hw *hw,
 808                               struct ieee80211_vif *vif,
 809                               struct ieee80211_sta *sta)
 810 {
 811         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 812         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
 813         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
 814         bool is_ap = vif->type == NL80211_IFTYPE_STATION;
 815         int ret;
 816         u8 sta_id;
 817
 818         IWL_DEBUG_INFO(priv, "proceeding to add station %pM\n",
 819                         sta->addr);
 820         sta_priv->sta_id = IWL_INVALID_STATION;
 821
 822         atomic_set(&sta_priv->pending_frames, 0);
 823         if (vif->type == NL80211_IFTYPE_AP)
 824                 sta_priv->client = true;
 825
 826         ret = iwl_add_station_common(priv, vif_priv->ctx, sta->addr,
 827                                      is_ap, sta, &sta_id);
 828         if (ret) {
 829                 IWL_ERR(priv, "Unable to add station %pM (%d)\n",
 830                         sta->addr, ret);
 831                 /* Should we return success if return code is EEXIST ? */
 832                 return ret;
 833         }
 834
 835         sta_priv->sta_id = sta_id;
 836
 837         return 0;
 838 }
 839
 840 static int iwlagn_mac_sta_remove(struct ieee80211_hw *hw,
 841                                  struct ieee80211_vif *vif,
 842                                  struct ieee80211_sta *sta)
 843 {
 844         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 845         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
 846         int ret;
 847
 848         IWL_DEBUG_INFO(priv, "proceeding to remove station %pM\n", sta->addr);
 849
 850         if (vif->type == NL80211_IFTYPE_STATION) {
 851                 /*
 852                  * Station will be removed from device when the RXON
 853                  * is set to unassociated -- just deactivate it here
 854                  * to avoid re-programming it.
 855                  */
 856                 ret = 0;
 857                 iwl_deactivate_station(priv, sta_priv->sta_id, sta->addr);
 858         } else {
 859                 ret = iwl_remove_station(priv, sta_priv->sta_id, sta->addr);
 860                 if (ret)
 861                         IWL_DEBUG_QUIET_RFKILL(priv,
 862                                 "Error removing station %pM\n", sta->addr);
 863         }
 864         return ret;
 865 }
 866
 867 static int iwlagn_mac_sta_state(struct ieee80211_hw *hw,
 868                                 struct ieee80211_vif *vif,
 869                                 struct ieee80211_sta *sta,
 870                                 enum ieee80211_sta_state old_state,
 871                                 enum ieee80211_sta_state new_state)
 872 {
 873         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 874         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
 875         enum {
 876                 NONE, ADD, REMOVE, HT_RATE_INIT, ADD_RATE_INIT,
 877         } op = NONE;
 878         int ret;
 879
 880         IWL_DEBUG_MAC80211(priv, "station %pM state change %d->%d\n",
 881                            sta->addr, old_state, new_state);
 882
 883         mutex_lock(&priv->mutex);
 884         if (vif->type == NL80211_IFTYPE_STATION) {
 885                 if (old_state == IEEE80211_STA_NOTEXIST &&
 886                     new_state == IEEE80211_STA_NONE)
 887                         op = ADD;
 888                 else if (old_state == IEEE80211_STA_NONE &&
 889                          new_state == IEEE80211_STA_NOTEXIST)
 890                         op = REMOVE;
 891                 else if (old_state == IEEE80211_STA_AUTH &&
 892                          new_state == IEEE80211_STA_ASSOC)
 893                         op = HT_RATE_INIT;
 894         } else {
 895                 if (old_state == IEEE80211_STA_AUTH &&
 896                     new_state == IEEE80211_STA_ASSOC)
 897                         op = ADD_RATE_INIT;
 898                 else if (old_state == IEEE80211_STA_ASSOC &&
 899                          new_state == IEEE80211_STA_AUTH)
 900                         op = REMOVE;
 901         }
 902
 903         switch (op) {
 904         case ADD:
 905                 ret = iwlagn_mac_sta_add(hw, vif, sta);
 906                 if (ret)
 907                         break;
 908                 /*
 909                  * Clear the in-progress flag, the AP station entry was added
 910                  * but we'll initialize LQ only when we've associated (which
 911                  * would also clear the in-progress flag). This is necessary
 912                  * in case we never initialize LQ because association fails.
 913                  */
 914                 spin_lock_bh(&priv->sta_lock);
 915                 priv->stations[iwl_sta_id(sta)].used &=
 916                         ~IWL_STA_UCODE_INPROGRESS;
 917                 spin_unlock_bh(&priv->sta_lock);
 918                 break;
 919         case REMOVE:
 920                 ret = iwlagn_mac_sta_remove(hw, vif, sta);
 921                 break;
 922         case ADD_RATE_INIT:
 923                 ret = iwlagn_mac_sta_add(hw, vif, sta);
 924                 if (ret)
 925                         break;
 926                 /* Initialize rate scaling */
 927                 IWL_DEBUG_INFO(priv,
 928                                "Initializing rate scaling for station %pM\n",
 929                                sta->addr);
 930                 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta));
 931                 ret = 0;
 932                 break;
 933         case HT_RATE_INIT:
 934                 /* Initialize rate scaling */
 935                 ret = iwl_sta_update_ht(priv, vif_priv->ctx, sta);
 936                 if (ret)
 937                         break;
 938                 IWL_DEBUG_INFO(priv,
 939                                "Initializing rate scaling for station %pM\n",
 940                                sta->addr);
 941                 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta));
 942                 ret = 0;
 943                 break;
 944         default:
 945                 ret = 0;
 946                 break;
 947         }
 948
 949         /*
 950          * mac80211 might WARN if we fail, but due the way we
 951          * (badly) handle hard rfkill, we might fail here
 952          */
 953         if (iwl_is_rfkill(priv))
 954                 ret = 0;
 955
 956         mutex_unlock(&priv->mutex);
 957         IWL_DEBUG_MAC80211(priv, "leave\n");
 958
 959         return ret;
 960 }
 961
 962 static void iwlagn_mac_channel_switch(struct ieee80211_hw *hw,
 963                                       struct ieee80211_vif *vif,
 964                                       struct ieee80211_channel_switch *ch_switch)
 965 {
 966         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 967         struct ieee80211_conf *conf = &hw->conf;
 968         struct ieee80211_channel *channel = ch_switch->chandef.chan;
 969         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
 970         /*
 971          * MULTI-FIXME
 972          * When we add support for multiple interfaces, we need to
 973          * revisit this. The channel switch command in the device
 974          * only affects the BSS context, but what does that really
 975          * mean? And what if we get a CSA on the second interface?
 976          * This needs a lot of work.
 977          */
 978         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 979         u16 ch;
 980
 981         IWL_DEBUG_MAC80211(priv, "enter\n");
 982
 983         mutex_lock(&priv->mutex);
 984
 985         if (iwl_is_rfkill(priv))
 986                 goto out;
 987
 988         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
 989             test_bit(STATUS_SCANNING, &priv->status) ||
 990             test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
 991                 goto out;
 992
 993         if (!iwl_is_associated_ctx(ctx))
 994                 goto out;
 995
 996         if (!priv->lib->set_channel_switch)
 997                 goto out;
 998
 999         ch = channel->hw_value;
1000         if (le16_to_cpu(ctx->active.channel) == ch)
1001                 goto out;
1002
1003         priv->current_ht_config.smps = conf->smps_mode;
1004
1005         /* Configure HT40 channels */
1006         switch (cfg80211_get_chandef_type(&ch_switch->chandef)) {
1007         case NL80211_CHAN_NO_HT:
1008         case NL80211_CHAN_HT20:
1009                 ctx->ht.is_40mhz = false;
1010                 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE;
1011                 break;
1012         case NL80211_CHAN_HT40MINUS:
1013                 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
1014                 ctx->ht.is_40mhz = true;
1015                 break;
1016         case NL80211_CHAN_HT40PLUS:
1017                 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
1018                 ctx->ht.is_40mhz = true;
1019                 break;
1020         }
1021
1022         if ((le16_to_cpu(ctx->staging.channel) != ch))
1023                 ctx->staging.flags = 0;
1024
1025         iwl_set_rxon_channel(priv, channel, ctx);
1026         iwl_set_rxon_ht(priv, ht_conf);
1027         iwl_set_flags_for_band(priv, ctx, channel->band, ctx->vif);
1028
1029         /*
1030          * at this point, staging_rxon has the
1031          * configuration for channel switch
1032          */
1033         set_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
1034         priv->switch_channel = cpu_to_le16(ch);
1035         if (priv->lib->set_channel_switch(priv, ch_switch)) {
1036                 clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
1037                 priv->switch_channel = 0;
1038                 ieee80211_chswitch_done(ctx->vif, false);
1039         }
1040
1041 out:
1042         mutex_unlock(&priv->mutex);
1043         IWL_DEBUG_MAC80211(priv, "leave\n");
1044 }
1045
1046 void iwl_chswitch_done(struct iwl_priv *priv, bool is_success)
1047 {
1048         /*
1049          * MULTI-FIXME
1050          * See iwlagn_mac_channel_switch.
1051          */
1052         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1053
1054         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1055                 return;
1056
1057         if (!test_and_clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
1058                 return;
1059
1060         if (ctx->vif)
1061                 ieee80211_chswitch_done(ctx->vif, is_success);
1062 }
1063
1064 static void iwlagn_configure_filter(struct ieee80211_hw *hw,
1065                                     unsigned int changed_flags,
1066                                     unsigned int *total_flags,
1067                                     u64 multicast)
1068 {
1069         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1070         __le32 filter_or = 0, filter_nand = 0;
1071         struct iwl_rxon_context *ctx;
1072
1073 #define CHK(test, flag) do { \
1074         if (*total_flags & (test))              \
1075                 filter_or |= (flag);            \
1076         else                                    \
1077                 filter_nand |= (flag);          \
1078         } while (0)
1079
1080         IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
1081                         changed_flags, *total_flags);
1082
1083         CHK(FIF_OTHER_BSS, RXON_FILTER_PROMISC_MSK);
1084         /* Setting _just_ RXON_FILTER_CTL2HOST_MSK causes FH errors */
1085         CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_PROMISC_MSK);
1086         CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
1087
1088 #undef CHK
1089
1090         mutex_lock(&priv->mutex);
1091
1092         for_each_context(priv, ctx) {
1093                 ctx->staging.filter_flags &= ~filter_nand;
1094                 ctx->staging.filter_flags |= filter_or;
1095
1096                 /*
1097                  * Not committing directly because hardware can perform a scan,
1098                  * but we'll eventually commit the filter flags change anyway.
1099                  */
1100         }
1101
1102         mutex_unlock(&priv->mutex);
1103
1104         /*
1105          * Receiving all multicast frames is always enabled by the
1106          * default flags setup in iwl_connection_init_rx_config()
1107          * since we currently do not support programming multicast
1108          * filters into the device.
1109          */
1110         *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI |
1111                         FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
1112 }
1113
1114 static void iwlagn_mac_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1115                              u32 queues, bool drop)
1116 {
1117         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1118         u32 scd_queues;
1119
1120         mutex_lock(&priv->mutex);
1121         IWL_DEBUG_MAC80211(priv, "enter\n");
1122
1123         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1124                 IWL_DEBUG_TX(priv, "Aborting flush due to device shutdown\n");
1125                 goto done;
1126         }
1127         if (iwl_is_rfkill(priv)) {
1128                 IWL_DEBUG_TX(priv, "Aborting flush due to RF Kill\n");
1129                 goto done;
1130         }
1131
1132         scd_queues = BIT(priv->cfg->base_params->num_of_queues) - 1;
1133         scd_queues &= ~(BIT(IWL_IPAN_CMD_QUEUE_NUM) |
1134                         BIT(IWL_DEFAULT_CMD_QUEUE_NUM));
1135
1136         if (drop) {
1137                 IWL_DEBUG_TX_QUEUES(priv, "Flushing SCD queues: 0x%x\n",
1138                                     scd_queues);
1139                 if (iwlagn_txfifo_flush(priv, scd_queues)) {
1140                         IWL_ERR(priv, "flush request fail\n");
1141                         goto done;
1142                 }
1143         }
1144
1145         IWL_DEBUG_TX_QUEUES(priv, "wait transmit/flush all frames\n");
1146         iwl_trans_wait_tx_queue_empty(priv->trans, scd_queues);
1147 done:
1148         mutex_unlock(&priv->mutex);
1149         IWL_DEBUG_MAC80211(priv, "leave\n");
1150 }
1151
1152 static void iwlagn_mac_event_callback(struct ieee80211_hw *hw,
1153                                       struct ieee80211_vif *vif,
1154                                       const struct ieee80211_event *event)
1155 {
1156         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1157
1158         if (event->type != RSSI_EVENT)
1159                 return;
1160
1161         IWL_DEBUG_MAC80211(priv, "enter\n");
1162
1163         if (priv->lib->bt_params &&
1164             priv->lib->bt_params->advanced_bt_coexist) {
1165                 if (event->u.rssi.data == RSSI_EVENT_LOW)
1166                         priv->bt_enable_pspoll = true;
1167                 else if (event->u.rssi.data == RSSI_EVENT_HIGH)
1168                         priv->bt_enable_pspoll = false;
1169
1170                 queue_work(priv->workqueue, &priv->bt_runtime_config);
1171         } else {
1172                 IWL_DEBUG_MAC80211(priv, "Advanced BT coex disabled,"
1173                                 "ignoring RSSI callback\n");
1174         }
1175
1176         IWL_DEBUG_MAC80211(priv, "leave\n");
1177 }
1178
1179 static int iwlagn_mac_set_tim(struct ieee80211_hw *hw,
1180                               struct ieee80211_sta *sta, bool set)
1181 {
1182         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1183
1184         queue_work(priv->workqueue, &priv->beacon_update);
1185
1186         return 0;
1187 }
1188
1189 static int iwlagn_mac_conf_tx(struct ieee80211_hw *hw,
1190                               struct ieee80211_vif *vif, u16 queue,
1191                               const struct ieee80211_tx_queue_params *params)
1192 {
1193         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1194         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1195         struct iwl_rxon_context *ctx = vif_priv->ctx;
1196         int q;
1197
1198         if (WARN_ON(!ctx))
1199                 return -EINVAL;
1200
1201         IWL_DEBUG_MAC80211(priv, "enter\n");
1202
1203         if (!iwl_is_ready_rf(priv)) {
1204                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1205                 return -EIO;
1206         }
1207
1208         if (queue >= AC_NUM) {
1209                 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1210                 return 0;
1211         }
1212
1213         q = AC_NUM - 1 - queue;
1214
1215         mutex_lock(&priv->mutex);
1216
1217         ctx->qos_data.def_qos_parm.ac[q].cw_min =
1218                 cpu_to_le16(params->cw_min);
1219         ctx->qos_data.def_qos_parm.ac[q].cw_max =
1220                 cpu_to_le16(params->cw_max);
1221         ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1222         ctx->qos_data.def_qos_parm.ac[q].edca_txop =
1223                         cpu_to_le16((params->txop * 32));
1224
1225         ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1226
1227         mutex_unlock(&priv->mutex);
1228
1229         IWL_DEBUG_MAC80211(priv, "leave\n");
1230         return 0;
1231 }
1232
1233 static int iwlagn_mac_tx_last_beacon(struct ieee80211_hw *hw)
1234 {
1235         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1236
1237         return priv->ibss_manager == IWL_IBSS_MANAGER;
1238 }
1239
1240 static int iwl_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1241 {
1242         iwl_connection_init_rx_config(priv, ctx);
1243
1244         iwlagn_set_rxon_chain(priv, ctx);
1245
1246         return iwlagn_commit_rxon(priv, ctx);
1247 }
1248
1249 static int iwl_setup_interface(struct iwl_priv *priv,
1250                                struct iwl_rxon_context *ctx)
1251 {
1252         struct ieee80211_vif *vif = ctx->vif;
1253         int err, ac;
1254
1255         lockdep_assert_held(&priv->mutex);
1256
1257         /*
1258          * This variable will be correct only when there's just
1259          * a single context, but all code using it is for hardware
1260          * that supports only one context.
1261          */
1262         priv->iw_mode = vif->type;
1263
1264         ctx->is_active = true;
1265
1266         err = iwl_set_mode(priv, ctx);
1267         if (err) {
1268                 if (!ctx->always_active)
1269                         ctx->is_active = false;
1270                 return err;
1271         }
1272
1273         if (priv->lib->bt_params && priv->lib->bt_params->advanced_bt_coexist &&
1274             vif->type == NL80211_IFTYPE_ADHOC) {
1275                 /*
1276                  * pretend to have high BT traffic as long as we
1277                  * are operating in IBSS mode, as this will cause
1278                  * the rate scaling etc. to behave as intended.
1279                  */
1280                 priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH;
1281         }
1282
1283         /* set up queue mappings */
1284         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
1285                 vif->hw_queue[ac] = ctx->ac_to_queue[ac];
1286
1287         if (vif->type == NL80211_IFTYPE_AP)
1288                 vif->cab_queue = ctx->mcast_queue;
1289         else
1290                 vif->cab_queue = IEEE80211_INVAL_HW_QUEUE;
1291
1292         return 0;
1293 }
1294
1295 static int iwlagn_mac_add_interface(struct ieee80211_hw *hw,
1296                                     struct ieee80211_vif *vif)
1297 {
1298         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1299         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1300         struct iwl_rxon_context *tmp, *ctx = NULL;
1301         int err;
1302         enum nl80211_iftype viftype = ieee80211_vif_type_p2p(vif);
1303         bool reset = false;
1304
1305         IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n",
1306                            viftype, vif->addr);
1307
1308         mutex_lock(&priv->mutex);
1309
1310         if (!iwl_is_ready_rf(priv)) {
1311                 IWL_WARN(priv, "Try to add interface when device not ready\n");
1312                 err = -EINVAL;
1313                 goto out;
1314         }
1315
1316         for_each_context(priv, tmp) {
1317                 u32 possible_modes =
1318                         tmp->interface_modes | tmp->exclusive_interface_modes;
1319
1320                 if (tmp->vif) {
1321                         /* On reset we need to add the same interface again */
1322                         if (tmp->vif == vif) {
1323                                 reset = true;
1324                                 ctx = tmp;
1325                                 break;
1326                         }
1327
1328                         /* check if this busy context is exclusive */
1329                         if (tmp->exclusive_interface_modes &
1330                                                 BIT(tmp->vif->type)) {
1331                                 err = -EINVAL;
1332                                 goto out;
1333                         }
1334                         continue;
1335                 }
1336
1337                 if (!(possible_modes & BIT(viftype)))
1338                         continue;
1339
1340                 /* have maybe usable context w/o interface */
1341                 ctx = tmp;
1342                 break;
1343         }
1344
1345         if (!ctx) {
1346                 err = -EOPNOTSUPP;
1347                 goto out;
1348         }
1349
1350         vif_priv->ctx = ctx;
1351         ctx->vif = vif;
1352
1353         /*
1354          * In SNIFFER device type, the firmware reports the FCS to
1355          * the host, rather than snipping it off. Unfortunately,
1356          * mac80211 doesn't (yet) provide a per-packet flag for
1357          * this, so that we have to set the hardware flag based
1358          * on the interfaces added. As the monitor interface can
1359          * only be present by itself, and will be removed before
1360          * other interfaces are added, this is safe.
1361          */
1362         if (vif->type == NL80211_IFTYPE_MONITOR)
1363                 ieee80211_hw_set(priv->hw, RX_INCLUDES_FCS);
1364         else
1365                 __clear_bit(IEEE80211_HW_RX_INCLUDES_FCS, priv->hw->flags);
1366
1367         err = iwl_setup_interface(priv, ctx);
1368         if (!err || reset)
1369                 goto out;
1370
1371         ctx->vif = NULL;
1372         priv->iw_mode = NL80211_IFTYPE_STATION;
1373  out:
1374         mutex_unlock(&priv->mutex);
1375
1376         IWL_DEBUG_MAC80211(priv, "leave\n");
1377         return err;
1378 }
1379
1380 static void iwl_teardown_interface(struct iwl_priv *priv,
1381                                    struct ieee80211_vif *vif,
1382                                    bool mode_change)
1383 {
1384         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1385
1386         lockdep_assert_held(&priv->mutex);
1387
1388         if (priv->scan_vif == vif) {
1389                 iwl_scan_cancel_timeout(priv, 200);
1390                 iwl_force_scan_end(priv);
1391         }
1392
1393         if (!mode_change) {
1394                 iwl_set_mode(priv, ctx);
1395                 if (!ctx->always_active)
1396                         ctx->is_active = false;
1397         }
1398
1399         /*
1400          * When removing the IBSS interface, overwrite the
1401          * BT traffic load with the stored one from the last
1402          * notification, if any. If this is a device that
1403          * doesn't implement this, this has no effect since
1404          * both values are the same and zero.
1405          */
1406         if (vif->type == NL80211_IFTYPE_ADHOC)
1407                 priv->bt_traffic_load = priv->last_bt_traffic_load;
1408 }
1409
1410 static void iwlagn_mac_remove_interface(struct ieee80211_hw *hw,
1411                               struct ieee80211_vif *vif)
1412 {
1413         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1414         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1415
1416         IWL_DEBUG_MAC80211(priv, "enter\n");
1417
1418         mutex_lock(&priv->mutex);
1419
1420         WARN_ON(ctx->vif != vif);
1421         ctx->vif = NULL;
1422
1423         iwl_teardown_interface(priv, vif, false);
1424
1425         mutex_unlock(&priv->mutex);
1426
1427         IWL_DEBUG_MAC80211(priv, "leave\n");
1428
1429 }
1430
1431 static int iwlagn_mac_change_interface(struct ieee80211_hw *hw,
1432                                        struct ieee80211_vif *vif,
1433                                        enum nl80211_iftype newtype, bool newp2p)
1434 {
1435         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1436         struct iwl_rxon_context *ctx, *tmp;
1437         enum nl80211_iftype newviftype = newtype;
1438         u32 interface_modes;
1439         int err;
1440
1441         IWL_DEBUG_MAC80211(priv, "enter\n");
1442
1443         newtype = ieee80211_iftype_p2p(newtype, newp2p);
1444
1445         mutex_lock(&priv->mutex);
1446
1447         ctx = iwl_rxon_ctx_from_vif(vif);
1448
1449         /*
1450          * To simplify this code, only support changes on the
1451          * BSS context. The PAN context is usually reassigned
1452          * by creating/removing P2P interfaces anyway.
1453          */
1454         if (ctx->ctxid != IWL_RXON_CTX_BSS) {
1455                 err = -EBUSY;
1456                 goto out;
1457         }
1458
1459         if (!ctx->vif || !iwl_is_ready_rf(priv)) {
1460                 /*
1461                  * Huh? But wait ... this can maybe happen when
1462                  * we're in the middle of a firmware restart!
1463                  */
1464                 err = -EBUSY;
1465                 goto out;
1466         }
1467
1468         /* Check if the switch is supported in the same context */
1469         interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes;
1470         if (!(interface_modes & BIT(newtype))) {
1471                 err = -EBUSY;
1472                 goto out;
1473         }
1474
1475         if (ctx->exclusive_interface_modes & BIT(newtype)) {
1476                 for_each_context(priv, tmp) {
1477                         if (ctx == tmp)
1478                                 continue;
1479
1480                         if (!tmp->is_active)
1481                                 continue;
1482
1483                         /*
1484                          * The current mode switch would be exclusive, but
1485                          * another context is active ... refuse the switch.
1486                          */
1487                         err = -EBUSY;
1488                         goto out;
1489                 }
1490         }
1491
1492         /* success */
1493         iwl_teardown_interface(priv, vif, true);
1494         vif->type = newviftype;
1495         vif->p2p = newp2p;
1496         err = iwl_setup_interface(priv, ctx);
1497         WARN_ON(err);
1498         /*
1499          * We've switched internally, but submitting to the
1500          * device may have failed for some reason. Mask this
1501          * error, because otherwise mac80211 will not switch
1502          * (and set the interface type back) and we'll be
1503          * out of sync with it.
1504          */
1505         err = 0;
1506
1507  out:
1508         mutex_unlock(&priv->mutex);
1509         IWL_DEBUG_MAC80211(priv, "leave\n");
1510
1511         return err;
1512 }
1513
1514 static int iwlagn_mac_hw_scan(struct ieee80211_hw *hw,
1515                               struct ieee80211_vif *vif,
1516                               struct ieee80211_scan_request *hw_req)
1517 {
1518         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1519         struct cfg80211_scan_request *req = &hw_req->req;
1520         int ret;
1521
1522         IWL_DEBUG_MAC80211(priv, "enter\n");
1523
1524         if (req->n_channels == 0)
1525                 return -EINVAL;
1526
1527         mutex_lock(&priv->mutex);
1528
1529         /*
1530          * If an internal scan is in progress, just set
1531          * up the scan_request as per above.
1532          */
1533         if (priv->scan_type != IWL_SCAN_NORMAL) {
1534                 IWL_DEBUG_SCAN(priv,
1535                                "SCAN request during internal scan - defer\n");
1536                 priv->scan_request = req;
1537                 priv->scan_vif = vif;
1538                 ret = 0;
1539         } else {
1540                 priv->scan_request = req;
1541                 priv->scan_vif = vif;
1542                 /*
1543                  * mac80211 will only ask for one band at a time
1544                  * so using channels[0] here is ok
1545                  */
1546                 ret = iwl_scan_initiate(priv, vif, IWL_SCAN_NORMAL,
1547                                         req->channels[0]->band);
1548                 if (ret) {
1549                         priv->scan_request = NULL;
1550                         priv->scan_vif = NULL;
1551                 }
1552         }
1553
1554         IWL_DEBUG_MAC80211(priv, "leave\n");
1555
1556         mutex_unlock(&priv->mutex);
1557
1558         return ret;
1559 }
1560
1561 static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
1562 {
1563         struct iwl_addsta_cmd cmd = {
1564                 .mode = STA_CONTROL_MODIFY_MSK,
1565                 .station_flags_msk = STA_FLG_PWR_SAVE_MSK,
1566                 .sta.sta_id = sta_id,
1567         };
1568
1569         iwl_send_add_sta(priv, &cmd, CMD_ASYNC);
1570 }
1571
1572 static void iwlagn_mac_sta_notify(struct ieee80211_hw *hw,
1573                                   struct ieee80211_vif *vif,
1574                                   enum sta_notify_cmd cmd,
1575                                   struct ieee80211_sta *sta)
1576 {
1577         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1578         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
1579         int sta_id;
1580
1581         IWL_DEBUG_MAC80211(priv, "enter\n");
1582
1583         switch (cmd) {
1584         case STA_NOTIFY_SLEEP:
1585                 WARN_ON(!sta_priv->client);
1586                 sta_priv->asleep = true;
1587                 if (atomic_read(&sta_priv->pending_frames) > 0)
1588                         ieee80211_sta_block_awake(hw, sta, true);
1589                 break;
1590         case STA_NOTIFY_AWAKE:
1591                 WARN_ON(!sta_priv->client);
1592                 if (!sta_priv->asleep)
1593                         break;
1594                 sta_priv->asleep = false;
1595                 sta_id = iwl_sta_id(sta);
1596                 if (sta_id != IWL_INVALID_STATION)
1597                         iwl_sta_modify_ps_wake(priv, sta_id);
1598                 break;
1599         default:
1600                 break;
1601         }
1602         IWL_DEBUG_MAC80211(priv, "leave\n");
1603 }
1604
1605 const struct ieee80211_ops iwlagn_hw_ops = {
1606         .tx = iwlagn_mac_tx,
1607         .start = iwlagn_mac_start,
1608         .stop = iwlagn_mac_stop,
1609 #ifdef CONFIG_PM_SLEEP
1610         .suspend = iwlagn_mac_suspend,
1611         .resume = iwlagn_mac_resume,
1612         .set_wakeup = iwlagn_mac_set_wakeup,
1613 #endif
1614         .add_interface = iwlagn_mac_add_interface,
1615         .remove_interface = iwlagn_mac_remove_interface,
1616         .change_interface = iwlagn_mac_change_interface,
1617         .config = iwlagn_mac_config,
1618         .configure_filter = iwlagn_configure_filter,
1619         .set_key = iwlagn_mac_set_key,
1620         .update_tkip_key = iwlagn_mac_update_tkip_key,
1621         .set_rekey_data = iwlagn_mac_set_rekey_data,
1622         .conf_tx = iwlagn_mac_conf_tx,
1623         .bss_info_changed = iwlagn_bss_info_changed,
1624         .ampdu_action = iwlagn_mac_ampdu_action,
1625         .hw_scan = iwlagn_mac_hw_scan,
1626         .sta_notify = iwlagn_mac_sta_notify,
1627         .sta_state = iwlagn_mac_sta_state,
1628         .channel_switch = iwlagn_mac_channel_switch,
1629         .flush = iwlagn_mac_flush,
1630         .tx_last_beacon = iwlagn_mac_tx_last_beacon,
1631         .event_callback = iwlagn_mac_event_callback,
1632         .set_tim = iwlagn_mac_set_tim,
1633 };
1634
1635 /* This function both allocates and initializes hw and priv. */
1636 struct ieee80211_hw *iwl_alloc_all(void)
1637 {
1638         struct iwl_priv *priv;
1639         struct iwl_op_mode *op_mode;
1640         /* mac80211 allocates memory for this device instance, including
1641          *   space for this driver's private structure */
1642         struct ieee80211_hw *hw;
1643
1644         hw = ieee80211_alloc_hw(sizeof(struct iwl_priv) +
1645                                 sizeof(struct iwl_op_mode), &iwlagn_hw_ops);
1646         if (!hw)
1647                 goto out;
1648
1649         op_mode = hw->priv;
1650         priv = IWL_OP_MODE_GET_DVM(op_mode);
1651         priv->hw = hw;
1652
1653 out:
1654         return hw;
1655 }