drivers/net/wireless/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 <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/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         hw->flags = IEEE80211_HW_SIGNAL_DBM |
 108                     IEEE80211_HW_AMPDU_AGGREGATION |
 109                     IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC |
 110                     IEEE80211_HW_SPECTRUM_MGMT |
 111                     IEEE80211_HW_REPORTS_TX_ACK_STATUS |
 112                     IEEE80211_HW_QUEUE_CONTROL |
 113                     IEEE80211_HW_SUPPORTS_PS |
 114                     IEEE80211_HW_SUPPORTS_DYNAMIC_PS |
 115                     IEEE80211_HW_WANT_MONITOR_VIF;
 116
 117         hw->offchannel_tx_hw_queue = IWL_AUX_QUEUE;
 118         hw->radiotap_mcs_details |= IEEE80211_RADIOTAP_MCS_HAVE_FMT;
 119
 120         /*
 121          * Including the following line will crash some AP's.  This
 122          * workaround removes the stimulus which causes the crash until
 123          * the AP software can be fixed.
 124         hw->max_tx_aggregation_subframes = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
 125          */
 126
 127         if (priv->nvm_data->sku_cap_11n_enable)
 128                 hw->flags |= IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS |
 129                              IEEE80211_HW_SUPPORTS_STATIC_SMPS;
 130
 131         /*
 132          * Enable 11w if advertised by firmware and software crypto
 133          * is not enabled (as the firmware will interpret some mgmt
 134          * packets, so enabling it with software crypto isn't safe)
 135          */
 136         if (priv->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_MFP &&
 137             !iwlwifi_mod_params.sw_crypto)
 138                 hw->flags |= IEEE80211_HW_MFP_CAPABLE;
 139
 140         hw->sta_data_size = sizeof(struct iwl_station_priv);
 141         hw->vif_data_size = sizeof(struct iwl_vif_priv);
 142
 143         for_each_context(priv, ctx) {
 144                 hw->wiphy->interface_modes |= ctx->interface_modes;
 145                 hw->wiphy->interface_modes |= ctx->exclusive_interface_modes;
 146         }
 147
 148         BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
 149
 150         if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
 151                 hw->wiphy->iface_combinations =
 152                         iwlagn_iface_combinations_dualmode;
 153                 hw->wiphy->n_iface_combinations =
 154                         ARRAY_SIZE(iwlagn_iface_combinations_dualmode);
 155         }
 156
 157         hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
 158         hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG |
 159                                        REGULATORY_DISABLE_BEACON_HINTS;
 160
 161 #ifdef CONFIG_PM_SLEEP
 162         if (priv->fw->img[IWL_UCODE_WOWLAN].sec[0].len &&
 163             priv->trans->ops->d3_suspend &&
 164             priv->trans->ops->d3_resume &&
 165             device_can_wakeup(priv->trans->dev)) {
 166                 priv->wowlan_support.flags = WIPHY_WOWLAN_MAGIC_PKT |
 167                                              WIPHY_WOWLAN_DISCONNECT |
 168                                              WIPHY_WOWLAN_EAP_IDENTITY_REQ |
 169                                              WIPHY_WOWLAN_RFKILL_RELEASE;
 170                 if (!iwlwifi_mod_params.sw_crypto)
 171                         priv->wowlan_support.flags |=
 172                                 WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
 173                                 WIPHY_WOWLAN_GTK_REKEY_FAILURE;
 174
 175                 priv->wowlan_support.n_patterns = IWLAGN_WOWLAN_MAX_PATTERNS;
 176                 priv->wowlan_support.pattern_min_len =
 177                                         IWLAGN_WOWLAN_MIN_PATTERN_LEN;
 178                 priv->wowlan_support.pattern_max_len =
 179                                         IWLAGN_WOWLAN_MAX_PATTERN_LEN;
 180                 hw->wiphy->wowlan = &priv->wowlan_support;
 181         }
 182 #endif
 183
 184         if (iwlwifi_mod_params.power_save)
 185                 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
 186         else
 187                 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
 188
 189         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
 190         /* we create the 802.11 header and a max-length SSID element */
 191         hw->wiphy->max_scan_ie_len = capa->max_probe_length - 24 - 34;
 192
 193         /*
 194          * We don't use all queues: 4 and 9 are unused and any
 195          * aggregation queue gets mapped down to the AC queue.
 196          */
 197         hw->queues = IWLAGN_FIRST_AMPDU_QUEUE;
 198
 199         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
 200
 201         if (priv->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels)
 202                 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
 203                         &priv->nvm_data->bands[IEEE80211_BAND_2GHZ];
 204         if (priv->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels)
 205                 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
 206                         &priv->nvm_data->bands[IEEE80211_BAND_5GHZ];
 207
 208         hw->wiphy->hw_version = priv->trans->hw_id;
 209
 210         iwl_leds_init(priv);
 211
 212         ret = ieee80211_register_hw(priv->hw);
 213         if (ret) {
 214                 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
 215                 iwl_leds_exit(priv);
 216                 return ret;
 217         }
 218         priv->mac80211_registered = 1;
 219
 220         return 0;
 221 }
 222
 223 void iwlagn_mac_unregister(struct iwl_priv *priv)
 224 {
 225         if (!priv->mac80211_registered)
 226                 return;
 227         iwl_leds_exit(priv);
 228         ieee80211_unregister_hw(priv->hw);
 229         priv->mac80211_registered = 0;
 230 }
 231
 232 static int __iwl_up(struct iwl_priv *priv)
 233 {
 234         struct iwl_rxon_context *ctx;
 235         int ret;
 236
 237         lockdep_assert_held(&priv->mutex);
 238
 239         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
 240                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
 241                 return -EIO;
 242         }
 243
 244         for_each_context(priv, ctx) {
 245                 ret = iwlagn_alloc_bcast_station(priv, ctx);
 246                 if (ret) {
 247                         iwl_dealloc_bcast_stations(priv);
 248                         return ret;
 249                 }
 250         }
 251
 252         ret = iwl_run_init_ucode(priv);
 253         if (ret) {
 254                 IWL_ERR(priv, "Failed to run INIT ucode: %d\n", ret);
 255                 goto error;
 256         }
 257
 258         ret = iwl_load_ucode_wait_alive(priv, IWL_UCODE_REGULAR);
 259         if (ret) {
 260                 IWL_ERR(priv, "Failed to start RT ucode: %d\n", ret);
 261                 goto error;
 262         }
 263
 264         ret = iwl_alive_start(priv);
 265         if (ret)
 266                 goto error;
 267         return 0;
 268
 269  error:
 270         set_bit(STATUS_EXIT_PENDING, &priv->status);
 271         iwl_down(priv);
 272         clear_bit(STATUS_EXIT_PENDING, &priv->status);
 273
 274         IWL_ERR(priv, "Unable to initialize device.\n");
 275         return ret;
 276 }
 277
 278 static int iwlagn_mac_start(struct ieee80211_hw *hw)
 279 {
 280         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 281         int ret;
 282
 283         IWL_DEBUG_MAC80211(priv, "enter\n");
 284
 285         /* we should be verifying the device is ready to be opened */
 286         mutex_lock(&priv->mutex);
 287         ret = __iwl_up(priv);
 288         mutex_unlock(&priv->mutex);
 289         if (ret)
 290                 return ret;
 291
 292         IWL_DEBUG_INFO(priv, "Start UP work done.\n");
 293
 294         /* Now we should be done, and the READY bit should be set. */
 295         if (WARN_ON(!test_bit(STATUS_READY, &priv->status)))
 296                 ret = -EIO;
 297
 298         iwlagn_led_enable(priv);
 299
 300         priv->is_open = 1;
 301         IWL_DEBUG_MAC80211(priv, "leave\n");
 302         return 0;
 303 }
 304
 305 static void iwlagn_mac_stop(struct ieee80211_hw *hw)
 306 {
 307         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 308
 309         IWL_DEBUG_MAC80211(priv, "enter\n");
 310
 311         if (!priv->is_open)
 312                 return;
 313
 314         priv->is_open = 0;
 315
 316         mutex_lock(&priv->mutex);
 317         iwl_down(priv);
 318         mutex_unlock(&priv->mutex);
 319
 320         iwl_cancel_deferred_work(priv);
 321
 322         flush_workqueue(priv->workqueue);
 323
 324         IWL_DEBUG_MAC80211(priv, "leave\n");
 325 }
 326
 327 static void iwlagn_mac_set_rekey_data(struct ieee80211_hw *hw,
 328                                       struct ieee80211_vif *vif,
 329                                       struct cfg80211_gtk_rekey_data *data)
 330 {
 331         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 332
 333         if (iwlwifi_mod_params.sw_crypto)
 334                 return;
 335
 336         IWL_DEBUG_MAC80211(priv, "enter\n");
 337         mutex_lock(&priv->mutex);
 338
 339         if (priv->contexts[IWL_RXON_CTX_BSS].vif != vif)
 340                 goto out;
 341
 342         memcpy(priv->kek, data->kek, NL80211_KEK_LEN);
 343         memcpy(priv->kck, data->kck, NL80211_KCK_LEN);
 344         priv->replay_ctr =
 345                 cpu_to_le64(be64_to_cpup((__be64 *)&data->replay_ctr));
 346         priv->have_rekey_data = true;
 347
 348  out:
 349         mutex_unlock(&priv->mutex);
 350         IWL_DEBUG_MAC80211(priv, "leave\n");
 351 }
 352
 353 #ifdef CONFIG_PM_SLEEP
 354
 355 static int iwlagn_mac_suspend(struct ieee80211_hw *hw,
 356                               struct cfg80211_wowlan *wowlan)
 357 {
 358         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 359         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 360         int ret;
 361
 362         if (WARN_ON(!wowlan))
 363                 return -EINVAL;
 364
 365         IWL_DEBUG_MAC80211(priv, "enter\n");
 366         mutex_lock(&priv->mutex);
 367
 368         /* Don't attempt WoWLAN when not associated, tear down instead. */
 369         if (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION ||
 370             !iwl_is_associated_ctx(ctx)) {
 371                 ret = 1;
 372                 goto out;
 373         }
 374
 375         ret = iwlagn_suspend(priv, wowlan);
 376         if (ret)
 377                 goto error;
 378
 379         /* let the ucode operate on its own */
 380         iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_SET,
 381                     CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE);
 382
 383         iwl_trans_d3_suspend(priv->trans, false);
 384
 385         goto out;
 386
 387  error:
 388         priv->wowlan = false;
 389         iwlagn_prepare_restart(priv);
 390         ieee80211_restart_hw(priv->hw);
 391  out:
 392         mutex_unlock(&priv->mutex);
 393         IWL_DEBUG_MAC80211(priv, "leave\n");
 394
 395         return ret;
 396 }
 397
 398 struct iwl_resume_data {
 399         struct iwl_priv *priv;
 400         struct iwlagn_wowlan_status *cmd;
 401         bool valid;
 402 };
 403
 404 static bool iwl_resume_status_fn(struct iwl_notif_wait_data *notif_wait,
 405                                  struct iwl_rx_packet *pkt, void *data)
 406 {
 407         struct iwl_resume_data *resume_data = data;
 408         struct iwl_priv *priv = resume_data->priv;
 409
 410         if (iwl_rx_packet_payload_len(pkt) != sizeof(*resume_data->cmd)) {
 411                 IWL_ERR(priv, "rx wrong size data\n");
 412                 return true;
 413         }
 414         memcpy(resume_data->cmd, pkt->data, sizeof(*resume_data->cmd));
 415         resume_data->valid = true;
 416
 417         return true;
 418 }
 419
 420 static int iwlagn_mac_resume(struct ieee80211_hw *hw)
 421 {
 422         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 423         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 424         struct ieee80211_vif *vif;
 425         u32 base;
 426         int ret;
 427         enum iwl_d3_status d3_status;
 428         struct error_table_start {
 429                 /* cf. struct iwl_error_event_table */
 430                 u32 valid;
 431                 u32 error_id;
 432         } err_info;
 433         struct iwl_notification_wait status_wait;
 434         static const u8 status_cmd[] = {
 435                 REPLY_WOWLAN_GET_STATUS,
 436         };
 437         struct iwlagn_wowlan_status status_data = {};
 438         struct iwl_resume_data resume_data = {
 439                 .priv = priv,
 440                 .cmd = &status_data,
 441                 .valid = false,
 442         };
 443         struct cfg80211_wowlan_wakeup wakeup = {
 444                 .pattern_idx = -1,
 445         };
 446 #ifdef CONFIG_IWLWIFI_DEBUGFS
 447         const struct fw_img *img;
 448 #endif
 449
 450         IWL_DEBUG_MAC80211(priv, "enter\n");
 451         mutex_lock(&priv->mutex);
 452
 453         /* we'll clear ctx->vif during iwlagn_prepare_restart() */
 454         vif = ctx->vif;
 455
 456         ret = iwl_trans_d3_resume(priv->trans, &d3_status, false);
 457         if (ret)
 458                 goto out_unlock;
 459
 460         if (d3_status != IWL_D3_STATUS_ALIVE) {
 461                 IWL_INFO(priv, "Device was reset during suspend\n");
 462                 goto out_unlock;
 463         }
 464
 465         /* uCode is no longer operating by itself */
 466         iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_CLR,
 467                     CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE);
 468
 469         base = priv->device_pointers.error_event_table;
 470         if (!iwlagn_hw_valid_rtc_data_addr(base)) {
 471                 IWL_WARN(priv, "Invalid error table during resume!\n");
 472                 goto out_unlock;
 473         }
 474
 475         iwl_trans_read_mem_bytes(priv->trans, base,
 476                                  &err_info, sizeof(err_info));
 477
 478         if (err_info.valid) {
 479                 IWL_INFO(priv, "error table is valid (%d, 0x%x)\n",
 480                          err_info.valid, err_info.error_id);
 481                 if (err_info.error_id == RF_KILL_INDICATOR_FOR_WOWLAN) {
 482                         wakeup.rfkill_release = true;
 483                         ieee80211_report_wowlan_wakeup(vif, &wakeup,
 484                                                        GFP_KERNEL);
 485                 }
 486                 goto out_unlock;
 487         }
 488
 489 #ifdef CONFIG_IWLWIFI_DEBUGFS
 490         img = &priv->fw->img[IWL_UCODE_WOWLAN];
 491         if (!priv->wowlan_sram)
 492                 priv->wowlan_sram =
 493                         kzalloc(img->sec[IWL_UCODE_SECTION_DATA].len,
 494                                 GFP_KERNEL);
 495
 496         if (priv->wowlan_sram)
 497                 iwl_trans_read_mem(priv->trans, 0x800000,
 498                                    priv->wowlan_sram,
 499                                    img->sec[IWL_UCODE_SECTION_DATA].len / 4);
 500 #endif
 501
 502         /*
 503          * This is very strange. The GET_STATUS command is sent but the device
 504          * doesn't reply properly, it seems it doesn't close the RBD so one is
 505          * always left open ... As a result, we need to send another command
 506          * and have to reset the driver afterwards. As we need to switch to
 507          * runtime firmware again that'll happen.
 508          */
 509
 510         iwl_init_notification_wait(&priv->notif_wait, &status_wait, status_cmd,
 511                                    ARRAY_SIZE(status_cmd), iwl_resume_status_fn,
 512                                    &resume_data);
 513
 514         iwl_dvm_send_cmd_pdu(priv, REPLY_WOWLAN_GET_STATUS, CMD_ASYNC, 0, NULL);
 515         iwl_dvm_send_cmd_pdu(priv, REPLY_ECHO, CMD_ASYNC, 0, NULL);
 516         /* an RBD is left open in the firmware now! */
 517
 518         ret = iwl_wait_notification(&priv->notif_wait, &status_wait, HZ/5);
 519         if (ret)
 520                 goto out_unlock;
 521
 522         if (resume_data.valid && priv->contexts[IWL_RXON_CTX_BSS].vif) {
 523                 u32 reasons = le32_to_cpu(status_data.wakeup_reason);
 524                 struct cfg80211_wowlan_wakeup *wakeup_report;
 525
 526                 IWL_INFO(priv, "WoWLAN wakeup reason(s): 0x%.8x\n", reasons);
 527
 528                 if (reasons) {
 529                         if (reasons & IWLAGN_WOWLAN_WAKEUP_MAGIC_PACKET)
 530                                 wakeup.magic_pkt = true;
 531                         if (reasons & IWLAGN_WOWLAN_WAKEUP_PATTERN_MATCH)
 532                                 wakeup.pattern_idx = status_data.pattern_number;
 533                         if (reasons & (IWLAGN_WOWLAN_WAKEUP_BEACON_MISS |
 534                                        IWLAGN_WOWLAN_WAKEUP_LINK_CHANGE))
 535                                 wakeup.disconnect = true;
 536                         if (reasons & IWLAGN_WOWLAN_WAKEUP_GTK_REKEY_FAIL)
 537                                 wakeup.gtk_rekey_failure = true;
 538                         if (reasons & IWLAGN_WOWLAN_WAKEUP_EAP_IDENT_REQ)
 539                                 wakeup.eap_identity_req = true;
 540                         if (reasons & IWLAGN_WOWLAN_WAKEUP_4WAY_HANDSHAKE)
 541                                 wakeup.four_way_handshake = true;
 542                         wakeup_report = &wakeup;
 543                 } else {
 544                         wakeup_report = NULL;
 545                 }
 546
 547                 ieee80211_report_wowlan_wakeup(vif, wakeup_report, GFP_KERNEL);
 548         }
 549
 550         priv->wowlan = false;
 551
 552         iwlagn_prepare_restart(priv);
 553
 554         memset((void *)&ctx->active, 0, sizeof(ctx->active));
 555         iwl_connection_init_rx_config(priv, ctx);
 556         iwlagn_set_rxon_chain(priv, ctx);
 557
 558  out_unlock:
 559         mutex_unlock(&priv->mutex);
 560         IWL_DEBUG_MAC80211(priv, "leave\n");
 561
 562         ieee80211_resume_disconnect(vif);
 563
 564         return 1;
 565 }
 566
 567 static void iwlagn_mac_set_wakeup(struct ieee80211_hw *hw, bool enabled)
 568 {
 569         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 570
 571         device_set_wakeup_enable(priv->trans->dev, enabled);
 572 }
 573 #endif
 574
 575 static void iwlagn_mac_tx(struct ieee80211_hw *hw,
 576                           struct ieee80211_tx_control *control,
 577                           struct sk_buff *skb)
 578 {
 579         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 580
 581         if (iwlagn_tx_skb(priv, control->sta, skb))
 582                 ieee80211_free_txskb(hw, skb);
 583 }
 584
 585 static void iwlagn_mac_update_tkip_key(struct ieee80211_hw *hw,
 586                                        struct ieee80211_vif *vif,
 587                                        struct ieee80211_key_conf *keyconf,
 588                                        struct ieee80211_sta *sta,
 589                                        u32 iv32, u16 *phase1key)
 590 {
 591         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 592
 593         iwl_update_tkip_key(priv, vif, keyconf, sta, iv32, phase1key);
 594 }
 595
 596 static int iwlagn_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
 597                               struct ieee80211_vif *vif,
 598                               struct ieee80211_sta *sta,
 599                               struct ieee80211_key_conf *key)
 600 {
 601         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 602         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
 603         struct iwl_rxon_context *ctx = vif_priv->ctx;
 604         int ret;
 605         bool is_default_wep_key = false;
 606
 607         IWL_DEBUG_MAC80211(priv, "enter\n");
 608
 609         if (iwlwifi_mod_params.sw_crypto) {
 610                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
 611                 return -EOPNOTSUPP;
 612         }
 613
 614         switch (key->cipher) {
 615         case WLAN_CIPHER_SUITE_TKIP:
 616                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
 617                 /* fall through */
 618         case WLAN_CIPHER_SUITE_CCMP:
 619                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 620                 break;
 621         default:
 622                 break;
 623         }
 624
 625         /*
 626          * We could program these keys into the hardware as well, but we
 627          * don't expect much multicast traffic in IBSS and having keys
 628          * for more stations is probably more useful.
 629          *
 630          * Mark key TX-only and return 0.
 631          */
 632         if (vif->type == NL80211_IFTYPE_ADHOC &&
 633             !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
 634                 key->hw_key_idx = WEP_INVALID_OFFSET;
 635                 return 0;
 636         }
 637
 638         /* If they key was TX-only, accept deletion */
 639         if (cmd == DISABLE_KEY && key->hw_key_idx == WEP_INVALID_OFFSET)
 640                 return 0;
 641
 642         mutex_lock(&priv->mutex);
 643         iwl_scan_cancel_timeout(priv, 100);
 644
 645         BUILD_BUG_ON(WEP_INVALID_OFFSET == IWLAGN_HW_KEY_DEFAULT);
 646
 647         /*
 648          * If we are getting WEP group key and we didn't receive any key mapping
 649          * so far, we are in legacy wep mode (group key only), otherwise we are
 650          * in 1X mode.
 651          * In legacy wep mode, we use another host command to the uCode.
 652          */
 653         if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
 654              key->cipher == WLAN_CIPHER_SUITE_WEP104) && !sta) {
 655                 if (cmd == SET_KEY)
 656                         is_default_wep_key = !ctx->key_mapping_keys;
 657                 else
 658                         is_default_wep_key =
 659                                 key->hw_key_idx == IWLAGN_HW_KEY_DEFAULT;
 660         }
 661
 662
 663         switch (cmd) {
 664         case SET_KEY:
 665                 if (is_default_wep_key) {
 666                         ret = iwl_set_default_wep_key(priv, vif_priv->ctx, key);
 667                         break;
 668                 }
 669                 ret = iwl_set_dynamic_key(priv, vif_priv->ctx, key, sta);
 670                 if (ret) {
 671                         /*
 672                          * can't add key for RX, but we don't need it
 673                          * in the device for TX so still return 0
 674                          */
 675                         ret = 0;
 676                         key->hw_key_idx = WEP_INVALID_OFFSET;
 677                 }
 678
 679                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
 680                 break;
 681         case DISABLE_KEY:
 682                 if (is_default_wep_key)
 683                         ret = iwl_remove_default_wep_key(priv, ctx, key);
 684                 else
 685                         ret = iwl_remove_dynamic_key(priv, ctx, key, sta);
 686
 687                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
 688                 break;
 689         default:
 690                 ret = -EINVAL;
 691         }
 692
 693         mutex_unlock(&priv->mutex);
 694         IWL_DEBUG_MAC80211(priv, "leave\n");
 695
 696         return ret;
 697 }
 698
 699 static int iwlagn_mac_ampdu_action(struct ieee80211_hw *hw,
 700                                    struct ieee80211_vif *vif,
 701                                    enum ieee80211_ampdu_mlme_action action,
 702                                    struct ieee80211_sta *sta, u16 tid, u16 *ssn,
 703                                    u8 buf_size)
 704 {
 705         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 706         int ret = -EINVAL;
 707         struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;
 708
 709         IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n",
 710                      sta->addr, tid);
 711
 712         if (!(priv->nvm_data->sku_cap_11n_enable))
 713                 return -EACCES;
 714
 715         IWL_DEBUG_MAC80211(priv, "enter\n");
 716         mutex_lock(&priv->mutex);
 717
 718         switch (action) {
 719         case IEEE80211_AMPDU_RX_START:
 720                 if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
 721                         break;
 722                 IWL_DEBUG_HT(priv, "start Rx\n");
 723                 ret = iwl_sta_rx_agg_start(priv, sta, tid, *ssn);
 724                 break;
 725         case IEEE80211_AMPDU_RX_STOP:
 726                 IWL_DEBUG_HT(priv, "stop Rx\n");
 727                 ret = iwl_sta_rx_agg_stop(priv, sta, tid);
 728                 break;
 729         case IEEE80211_AMPDU_TX_START:
 730                 if (!priv->trans->ops->txq_enable)
 731                         break;
 732                 if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
 733                         break;
 734                 IWL_DEBUG_HT(priv, "start Tx\n");
 735                 ret = iwlagn_tx_agg_start(priv, vif, sta, tid, ssn);
 736                 break;
 737         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 738         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 739                 IWL_DEBUG_HT(priv, "Flush Tx\n");
 740                 ret = iwlagn_tx_agg_flush(priv, vif, sta, tid);
 741                 break;
 742         case IEEE80211_AMPDU_TX_STOP_CONT:
 743                 IWL_DEBUG_HT(priv, "stop Tx\n");
 744                 ret = iwlagn_tx_agg_stop(priv, vif, sta, tid);
 745                 if ((ret == 0) && (priv->agg_tids_count > 0)) {
 746                         priv->agg_tids_count--;
 747                         IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n",
 748                                      priv->agg_tids_count);
 749                 }
 750                 if (!priv->agg_tids_count &&
 751                     priv->hw_params.use_rts_for_aggregation) {
 752                         /*
 753                          * switch off RTS/CTS if it was previously enabled
 754                          */
 755                         sta_priv->lq_sta.lq.general_params.flags &=
 756                                 ~LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
 757                         iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif),
 758                                         &sta_priv->lq_sta.lq, CMD_ASYNC, false);
 759                 }
 760                 break;
 761         case IEEE80211_AMPDU_TX_OPERATIONAL:
 762                 ret = iwlagn_tx_agg_oper(priv, vif, sta, tid, buf_size);
 763                 break;
 764         }
 765         mutex_unlock(&priv->mutex);
 766         IWL_DEBUG_MAC80211(priv, "leave\n");
 767         return ret;
 768 }
 769
 770 static int iwlagn_mac_sta_add(struct ieee80211_hw *hw,
 771                               struct ieee80211_vif *vif,
 772                               struct ieee80211_sta *sta)
 773 {
 774         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 775         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
 776         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
 777         bool is_ap = vif->type == NL80211_IFTYPE_STATION;
 778         int ret;
 779         u8 sta_id;
 780
 781         IWL_DEBUG_INFO(priv, "proceeding to add station %pM\n",
 782                         sta->addr);
 783         sta_priv->sta_id = IWL_INVALID_STATION;
 784
 785         atomic_set(&sta_priv->pending_frames, 0);
 786         if (vif->type == NL80211_IFTYPE_AP)
 787                 sta_priv->client = true;
 788
 789         ret = iwl_add_station_common(priv, vif_priv->ctx, sta->addr,
 790                                      is_ap, sta, &sta_id);
 791         if (ret) {
 792                 IWL_ERR(priv, "Unable to add station %pM (%d)\n",
 793                         sta->addr, ret);
 794                 /* Should we return success if return code is EEXIST ? */
 795                 return ret;
 796         }
 797
 798         sta_priv->sta_id = sta_id;
 799
 800         return 0;
 801 }
 802
 803 static int iwlagn_mac_sta_remove(struct ieee80211_hw *hw,
 804                                  struct ieee80211_vif *vif,
 805                                  struct ieee80211_sta *sta)
 806 {
 807         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 808         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
 809         int ret;
 810
 811         IWL_DEBUG_INFO(priv, "proceeding to remove station %pM\n", sta->addr);
 812
 813         if (vif->type == NL80211_IFTYPE_STATION) {
 814                 /*
 815                  * Station will be removed from device when the RXON
 816                  * is set to unassociated -- just deactivate it here
 817                  * to avoid re-programming it.
 818                  */
 819                 ret = 0;
 820                 iwl_deactivate_station(priv, sta_priv->sta_id, sta->addr);
 821         } else {
 822                 ret = iwl_remove_station(priv, sta_priv->sta_id, sta->addr);
 823                 if (ret)
 824                         IWL_DEBUG_QUIET_RFKILL(priv,
 825                                 "Error removing station %pM\n", sta->addr);
 826         }
 827         return ret;
 828 }
 829
 830 static int iwlagn_mac_sta_state(struct ieee80211_hw *hw,
 831                                 struct ieee80211_vif *vif,
 832                                 struct ieee80211_sta *sta,
 833                                 enum ieee80211_sta_state old_state,
 834                                 enum ieee80211_sta_state new_state)
 835 {
 836         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 837         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
 838         enum {
 839                 NONE, ADD, REMOVE, HT_RATE_INIT, ADD_RATE_INIT,
 840         } op = NONE;
 841         int ret;
 842
 843         IWL_DEBUG_MAC80211(priv, "station %pM state change %d->%d\n",
 844                            sta->addr, old_state, new_state);
 845
 846         mutex_lock(&priv->mutex);
 847         if (vif->type == NL80211_IFTYPE_STATION) {
 848                 if (old_state == IEEE80211_STA_NOTEXIST &&
 849                     new_state == IEEE80211_STA_NONE)
 850                         op = ADD;
 851                 else if (old_state == IEEE80211_STA_NONE &&
 852                          new_state == IEEE80211_STA_NOTEXIST)
 853                         op = REMOVE;
 854                 else if (old_state == IEEE80211_STA_AUTH &&
 855                          new_state == IEEE80211_STA_ASSOC)
 856                         op = HT_RATE_INIT;
 857         } else {
 858                 if (old_state == IEEE80211_STA_AUTH &&
 859                     new_state == IEEE80211_STA_ASSOC)
 860                         op = ADD_RATE_INIT;
 861                 else if (old_state == IEEE80211_STA_ASSOC &&
 862                          new_state == IEEE80211_STA_AUTH)
 863                         op = REMOVE;
 864         }
 865
 866         switch (op) {
 867         case ADD:
 868                 ret = iwlagn_mac_sta_add(hw, vif, sta);
 869                 if (ret)
 870                         break;
 871                 /*
 872                  * Clear the in-progress flag, the AP station entry was added
 873                  * but we'll initialize LQ only when we've associated (which
 874                  * would also clear the in-progress flag). This is necessary
 875                  * in case we never initialize LQ because association fails.
 876                  */
 877                 spin_lock_bh(&priv->sta_lock);
 878                 priv->stations[iwl_sta_id(sta)].used &=
 879                         ~IWL_STA_UCODE_INPROGRESS;
 880                 spin_unlock_bh(&priv->sta_lock);
 881                 break;
 882         case REMOVE:
 883                 ret = iwlagn_mac_sta_remove(hw, vif, sta);
 884                 break;
 885         case ADD_RATE_INIT:
 886                 ret = iwlagn_mac_sta_add(hw, vif, sta);
 887                 if (ret)
 888                         break;
 889                 /* Initialize rate scaling */
 890                 IWL_DEBUG_INFO(priv,
 891                                "Initializing rate scaling for station %pM\n",
 892                                sta->addr);
 893                 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta));
 894                 ret = 0;
 895                 break;
 896         case HT_RATE_INIT:
 897                 /* Initialize rate scaling */
 898                 ret = iwl_sta_update_ht(priv, vif_priv->ctx, sta);
 899                 if (ret)
 900                         break;
 901                 IWL_DEBUG_INFO(priv,
 902                                "Initializing rate scaling for station %pM\n",
 903                                sta->addr);
 904                 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta));
 905                 ret = 0;
 906                 break;
 907         default:
 908                 ret = 0;
 909                 break;
 910         }
 911
 912         /*
 913          * mac80211 might WARN if we fail, but due the way we
 914          * (badly) handle hard rfkill, we might fail here
 915          */
 916         if (iwl_is_rfkill(priv))
 917                 ret = 0;
 918
 919         mutex_unlock(&priv->mutex);
 920         IWL_DEBUG_MAC80211(priv, "leave\n");
 921
 922         return ret;
 923 }
 924
 925 static void iwlagn_mac_channel_switch(struct ieee80211_hw *hw,
 926                                       struct ieee80211_channel_switch *ch_switch)
 927 {
 928         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 929         struct ieee80211_conf *conf = &hw->conf;
 930         struct ieee80211_channel *channel = ch_switch->chandef.chan;
 931         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
 932         /*
 933          * MULTI-FIXME
 934          * When we add support for multiple interfaces, we need to
 935          * revisit this. The channel switch command in the device
 936          * only affects the BSS context, but what does that really
 937          * mean? And what if we get a CSA on the second interface?
 938          * This needs a lot of work.
 939          */
 940         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 941         u16 ch;
 942
 943         IWL_DEBUG_MAC80211(priv, "enter\n");
 944
 945         mutex_lock(&priv->mutex);
 946
 947         if (iwl_is_rfkill(priv))
 948                 goto out;
 949
 950         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
 951             test_bit(STATUS_SCANNING, &priv->status) ||
 952             test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
 953                 goto out;
 954
 955         if (!iwl_is_associated_ctx(ctx))
 956                 goto out;
 957
 958         if (!priv->lib->set_channel_switch)
 959                 goto out;
 960
 961         ch = channel->hw_value;
 962         if (le16_to_cpu(ctx->active.channel) == ch)
 963                 goto out;
 964
 965         priv->current_ht_config.smps = conf->smps_mode;
 966
 967         /* Configure HT40 channels */
 968         switch (cfg80211_get_chandef_type(&ch_switch->chandef)) {
 969         case NL80211_CHAN_NO_HT:
 970         case NL80211_CHAN_HT20:
 971                 ctx->ht.is_40mhz = false;
 972                 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE;
 973                 break;
 974         case NL80211_CHAN_HT40MINUS:
 975                 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
 976                 ctx->ht.is_40mhz = true;
 977                 break;
 978         case NL80211_CHAN_HT40PLUS:
 979                 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
 980                 ctx->ht.is_40mhz = true;
 981                 break;
 982         }
 983
 984         if ((le16_to_cpu(ctx->staging.channel) != ch))
 985                 ctx->staging.flags = 0;
 986
 987         iwl_set_rxon_channel(priv, channel, ctx);
 988         iwl_set_rxon_ht(priv, ht_conf);
 989         iwl_set_flags_for_band(priv, ctx, channel->band, ctx->vif);
 990
 991         /*
 992          * at this point, staging_rxon has the
 993          * configuration for channel switch
 994          */
 995         set_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
 996         priv->switch_channel = cpu_to_le16(ch);
 997         if (priv->lib->set_channel_switch(priv, ch_switch)) {
 998                 clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
 999                 priv->switch_channel = 0;
1000                 ieee80211_chswitch_done(ctx->vif, false);
1001         }
1002
1003 out:
1004         mutex_unlock(&priv->mutex);
1005         IWL_DEBUG_MAC80211(priv, "leave\n");
1006 }
1007
1008 void iwl_chswitch_done(struct iwl_priv *priv, bool is_success)
1009 {
1010         /*
1011          * MULTI-FIXME
1012          * See iwlagn_mac_channel_switch.
1013          */
1014         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1015
1016         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1017                 return;
1018
1019         if (!test_and_clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
1020                 return;
1021
1022         if (ctx->vif)
1023                 ieee80211_chswitch_done(ctx->vif, is_success);
1024 }
1025
1026 static void iwlagn_configure_filter(struct ieee80211_hw *hw,
1027                                     unsigned int changed_flags,
1028                                     unsigned int *total_flags,
1029                                     u64 multicast)
1030 {
1031         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1032         __le32 filter_or = 0, filter_nand = 0;
1033         struct iwl_rxon_context *ctx;
1034
1035 #define CHK(test, flag) do { \
1036         if (*total_flags & (test))              \
1037                 filter_or |= (flag);            \
1038         else                                    \
1039                 filter_nand |= (flag);          \
1040         } while (0)
1041
1042         IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
1043                         changed_flags, *total_flags);
1044
1045         CHK(FIF_OTHER_BSS | FIF_PROMISC_IN_BSS, RXON_FILTER_PROMISC_MSK);
1046         /* Setting _just_ RXON_FILTER_CTL2HOST_MSK causes FH errors */
1047         CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_PROMISC_MSK);
1048         CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
1049
1050 #undef CHK
1051
1052         mutex_lock(&priv->mutex);
1053
1054         for_each_context(priv, ctx) {
1055                 ctx->staging.filter_flags &= ~filter_nand;
1056                 ctx->staging.filter_flags |= filter_or;
1057
1058                 /*
1059                  * Not committing directly because hardware can perform a scan,
1060                  * but we'll eventually commit the filter flags change anyway.
1061                  */
1062         }
1063
1064         mutex_unlock(&priv->mutex);
1065
1066         /*
1067          * Receiving all multicast frames is always enabled by the
1068          * default flags setup in iwl_connection_init_rx_config()
1069          * since we currently do not support programming multicast
1070          * filters into the device.
1071          */
1072         *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS |
1073                         FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
1074 }
1075
1076 static void iwlagn_mac_flush(struct ieee80211_hw *hw, u32 queues, bool drop)
1077 {
1078         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1079
1080         mutex_lock(&priv->mutex);
1081         IWL_DEBUG_MAC80211(priv, "enter\n");
1082
1083         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1084                 IWL_DEBUG_TX(priv, "Aborting flush due to device shutdown\n");
1085                 goto done;
1086         }
1087         if (iwl_is_rfkill(priv)) {
1088                 IWL_DEBUG_TX(priv, "Aborting flush due to RF Kill\n");
1089                 goto done;
1090         }
1091
1092         /*
1093          * mac80211 will not push any more frames for transmit
1094          * until the flush is completed
1095          */
1096         if (drop) {
1097                 IWL_DEBUG_MAC80211(priv, "send flush command\n");
1098                 if (iwlagn_txfifo_flush(priv, 0)) {
1099                         IWL_ERR(priv, "flush request fail\n");
1100                         goto done;
1101                 }
1102         }
1103         IWL_DEBUG_MAC80211(priv, "wait transmit/flush all frames\n");
1104         iwl_trans_wait_tx_queue_empty(priv->trans);
1105 done:
1106         mutex_unlock(&priv->mutex);
1107         IWL_DEBUG_MAC80211(priv, "leave\n");
1108 }
1109
1110 static void iwlagn_mac_rssi_callback(struct ieee80211_hw *hw,
1111                                      struct ieee80211_vif *vif,
1112                                      enum ieee80211_rssi_event rssi_event)
1113 {
1114         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1115
1116         IWL_DEBUG_MAC80211(priv, "enter\n");
1117         mutex_lock(&priv->mutex);
1118
1119         if (priv->lib->bt_params &&
1120             priv->lib->bt_params->advanced_bt_coexist) {
1121                 if (rssi_event == RSSI_EVENT_LOW)
1122                         priv->bt_enable_pspoll = true;
1123                 else if (rssi_event == RSSI_EVENT_HIGH)
1124                         priv->bt_enable_pspoll = false;
1125
1126                 iwlagn_send_advance_bt_config(priv);
1127         } else {
1128                 IWL_DEBUG_MAC80211(priv, "Advanced BT coex disabled,"
1129                                 "ignoring RSSI callback\n");
1130         }
1131
1132         mutex_unlock(&priv->mutex);
1133         IWL_DEBUG_MAC80211(priv, "leave\n");
1134 }
1135
1136 static int iwlagn_mac_set_tim(struct ieee80211_hw *hw,
1137                               struct ieee80211_sta *sta, bool set)
1138 {
1139         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1140
1141         queue_work(priv->workqueue, &priv->beacon_update);
1142
1143         return 0;
1144 }
1145
1146 static int iwlagn_mac_conf_tx(struct ieee80211_hw *hw,
1147                               struct ieee80211_vif *vif, u16 queue,
1148                               const struct ieee80211_tx_queue_params *params)
1149 {
1150         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1151         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1152         struct iwl_rxon_context *ctx = vif_priv->ctx;
1153         int q;
1154
1155         if (WARN_ON(!ctx))
1156                 return -EINVAL;
1157
1158         IWL_DEBUG_MAC80211(priv, "enter\n");
1159
1160         if (!iwl_is_ready_rf(priv)) {
1161                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1162                 return -EIO;
1163         }
1164
1165         if (queue >= AC_NUM) {
1166                 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1167                 return 0;
1168         }
1169
1170         q = AC_NUM - 1 - queue;
1171
1172         mutex_lock(&priv->mutex);
1173
1174         ctx->qos_data.def_qos_parm.ac[q].cw_min =
1175                 cpu_to_le16(params->cw_min);
1176         ctx->qos_data.def_qos_parm.ac[q].cw_max =
1177                 cpu_to_le16(params->cw_max);
1178         ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1179         ctx->qos_data.def_qos_parm.ac[q].edca_txop =
1180                         cpu_to_le16((params->txop * 32));
1181
1182         ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1183
1184         mutex_unlock(&priv->mutex);
1185
1186         IWL_DEBUG_MAC80211(priv, "leave\n");
1187         return 0;
1188 }
1189
1190 static int iwlagn_mac_tx_last_beacon(struct ieee80211_hw *hw)
1191 {
1192         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1193
1194         return priv->ibss_manager == IWL_IBSS_MANAGER;
1195 }
1196
1197 static int iwl_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1198 {
1199         iwl_connection_init_rx_config(priv, ctx);
1200
1201         iwlagn_set_rxon_chain(priv, ctx);
1202
1203         return iwlagn_commit_rxon(priv, ctx);
1204 }
1205
1206 static int iwl_setup_interface(struct iwl_priv *priv,
1207                                struct iwl_rxon_context *ctx)
1208 {
1209         struct ieee80211_vif *vif = ctx->vif;
1210         int err, ac;
1211
1212         lockdep_assert_held(&priv->mutex);
1213
1214         /*
1215          * This variable will be correct only when there's just
1216          * a single context, but all code using it is for hardware
1217          * that supports only one context.
1218          */
1219         priv->iw_mode = vif->type;
1220
1221         ctx->is_active = true;
1222
1223         err = iwl_set_mode(priv, ctx);
1224         if (err) {
1225                 if (!ctx->always_active)
1226                         ctx->is_active = false;
1227                 return err;
1228         }
1229
1230         if (priv->lib->bt_params && priv->lib->bt_params->advanced_bt_coexist &&
1231             vif->type == NL80211_IFTYPE_ADHOC) {
1232                 /*
1233                  * pretend to have high BT traffic as long as we
1234                  * are operating in IBSS mode, as this will cause
1235                  * the rate scaling etc. to behave as intended.
1236                  */
1237                 priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH;
1238         }
1239
1240         /* set up queue mappings */
1241         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
1242                 vif->hw_queue[ac] = ctx->ac_to_queue[ac];
1243
1244         if (vif->type == NL80211_IFTYPE_AP)
1245                 vif->cab_queue = ctx->mcast_queue;
1246         else
1247                 vif->cab_queue = IEEE80211_INVAL_HW_QUEUE;
1248
1249         return 0;
1250 }
1251
1252 static int iwlagn_mac_add_interface(struct ieee80211_hw *hw,
1253                                     struct ieee80211_vif *vif)
1254 {
1255         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1256         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1257         struct iwl_rxon_context *tmp, *ctx = NULL;
1258         int err;
1259         enum nl80211_iftype viftype = ieee80211_vif_type_p2p(vif);
1260         bool reset = false;
1261
1262         IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n",
1263                            viftype, vif->addr);
1264
1265         mutex_lock(&priv->mutex);
1266
1267         if (!iwl_is_ready_rf(priv)) {
1268                 IWL_WARN(priv, "Try to add interface when device not ready\n");
1269                 err = -EINVAL;
1270                 goto out;
1271         }
1272
1273         for_each_context(priv, tmp) {
1274                 u32 possible_modes =
1275                         tmp->interface_modes | tmp->exclusive_interface_modes;
1276
1277                 if (tmp->vif) {
1278                         /* On reset we need to add the same interface again */
1279                         if (tmp->vif == vif) {
1280                                 reset = true;
1281                                 ctx = tmp;
1282                                 break;
1283                         }
1284
1285                         /* check if this busy context is exclusive */
1286                         if (tmp->exclusive_interface_modes &
1287                                                 BIT(tmp->vif->type)) {
1288                                 err = -EINVAL;
1289                                 goto out;
1290                         }
1291                         continue;
1292                 }
1293
1294                 if (!(possible_modes & BIT(viftype)))
1295                         continue;
1296
1297                 /* have maybe usable context w/o interface */
1298                 ctx = tmp;
1299                 break;
1300         }
1301
1302         if (!ctx) {
1303                 err = -EOPNOTSUPP;
1304                 goto out;
1305         }
1306
1307         vif_priv->ctx = ctx;
1308         ctx->vif = vif;
1309
1310         /*
1311          * In SNIFFER device type, the firmware reports the FCS to
1312          * the host, rather than snipping it off. Unfortunately,
1313          * mac80211 doesn't (yet) provide a per-packet flag for
1314          * this, so that we have to set the hardware flag based
1315          * on the interfaces added. As the monitor interface can
1316          * only be present by itself, and will be removed before
1317          * other interfaces are added, this is safe.
1318          */
1319         if (vif->type == NL80211_IFTYPE_MONITOR)
1320                 priv->hw->flags |= IEEE80211_HW_RX_INCLUDES_FCS;
1321         else
1322                 priv->hw->flags &= ~IEEE80211_HW_RX_INCLUDES_FCS;
1323
1324         err = iwl_setup_interface(priv, ctx);
1325         if (!err || reset)
1326                 goto out;
1327
1328         ctx->vif = NULL;
1329         priv->iw_mode = NL80211_IFTYPE_STATION;
1330  out:
1331         mutex_unlock(&priv->mutex);
1332
1333         IWL_DEBUG_MAC80211(priv, "leave\n");
1334         return err;
1335 }
1336
1337 static void iwl_teardown_interface(struct iwl_priv *priv,
1338                                    struct ieee80211_vif *vif,
1339                                    bool mode_change)
1340 {
1341         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1342
1343         lockdep_assert_held(&priv->mutex);
1344
1345         if (priv->scan_vif == vif) {
1346                 iwl_scan_cancel_timeout(priv, 200);
1347                 iwl_force_scan_end(priv);
1348         }
1349
1350         if (!mode_change) {
1351                 iwl_set_mode(priv, ctx);
1352                 if (!ctx->always_active)
1353                         ctx->is_active = false;
1354         }
1355
1356         /*
1357          * When removing the IBSS interface, overwrite the
1358          * BT traffic load with the stored one from the last
1359          * notification, if any. If this is a device that
1360          * doesn't implement this, this has no effect since
1361          * both values are the same and zero.
1362          */
1363         if (vif->type == NL80211_IFTYPE_ADHOC)
1364                 priv->bt_traffic_load = priv->last_bt_traffic_load;
1365 }
1366
1367 static void iwlagn_mac_remove_interface(struct ieee80211_hw *hw,
1368                               struct ieee80211_vif *vif)
1369 {
1370         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1371         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1372
1373         IWL_DEBUG_MAC80211(priv, "enter\n");
1374
1375         mutex_lock(&priv->mutex);
1376
1377         if (WARN_ON(ctx->vif != vif)) {
1378                 struct iwl_rxon_context *tmp;
1379                 IWL_ERR(priv, "ctx->vif = %p, vif = %p\n", ctx->vif, vif);
1380                 for_each_context(priv, tmp)
1381                         IWL_ERR(priv, "\tID = %d:\tctx = %p\tctx->vif = %p\n",
1382                                 tmp->ctxid, tmp, tmp->vif);
1383         }
1384         ctx->vif = NULL;
1385
1386         iwl_teardown_interface(priv, vif, false);
1387
1388         mutex_unlock(&priv->mutex);
1389
1390         IWL_DEBUG_MAC80211(priv, "leave\n");
1391
1392 }
1393
1394 static int iwlagn_mac_change_interface(struct ieee80211_hw *hw,
1395                                        struct ieee80211_vif *vif,
1396                                        enum nl80211_iftype newtype, bool newp2p)
1397 {
1398         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1399         struct iwl_rxon_context *ctx, *tmp;
1400         enum nl80211_iftype newviftype = newtype;
1401         u32 interface_modes;
1402         int err;
1403
1404         IWL_DEBUG_MAC80211(priv, "enter\n");
1405
1406         newtype = ieee80211_iftype_p2p(newtype, newp2p);
1407
1408         mutex_lock(&priv->mutex);
1409
1410         ctx = iwl_rxon_ctx_from_vif(vif);
1411
1412         /*
1413          * To simplify this code, only support changes on the
1414          * BSS context. The PAN context is usually reassigned
1415          * by creating/removing P2P interfaces anyway.
1416          */
1417         if (ctx->ctxid != IWL_RXON_CTX_BSS) {
1418                 err = -EBUSY;
1419                 goto out;
1420         }
1421
1422         if (!ctx->vif || !iwl_is_ready_rf(priv)) {
1423                 /*
1424                  * Huh? But wait ... this can maybe happen when
1425                  * we're in the middle of a firmware restart!
1426                  */
1427                 err = -EBUSY;
1428                 goto out;
1429         }
1430
1431         /* Check if the switch is supported in the same context */
1432         interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes;
1433         if (!(interface_modes & BIT(newtype))) {
1434                 err = -EBUSY;
1435                 goto out;
1436         }
1437
1438         if (ctx->exclusive_interface_modes & BIT(newtype)) {
1439                 for_each_context(priv, tmp) {
1440                         if (ctx == tmp)
1441                                 continue;
1442
1443                         if (!tmp->is_active)
1444                                 continue;
1445
1446                         /*
1447                          * The current mode switch would be exclusive, but
1448                          * another context is active ... refuse the switch.
1449                          */
1450                         err = -EBUSY;
1451                         goto out;
1452                 }
1453         }
1454
1455         /* success */
1456         iwl_teardown_interface(priv, vif, true);
1457         vif->type = newviftype;
1458         vif->p2p = newp2p;
1459         err = iwl_setup_interface(priv, ctx);
1460         WARN_ON(err);
1461         /*
1462          * We've switched internally, but submitting to the
1463          * device may have failed for some reason. Mask this
1464          * error, because otherwise mac80211 will not switch
1465          * (and set the interface type back) and we'll be
1466          * out of sync with it.
1467          */
1468         err = 0;
1469
1470  out:
1471         mutex_unlock(&priv->mutex);
1472         IWL_DEBUG_MAC80211(priv, "leave\n");
1473
1474         return err;
1475 }
1476
1477 static int iwlagn_mac_hw_scan(struct ieee80211_hw *hw,
1478                               struct ieee80211_vif *vif,
1479                               struct cfg80211_scan_request *req)
1480 {
1481         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1482         int ret;
1483
1484         IWL_DEBUG_MAC80211(priv, "enter\n");
1485
1486         if (req->n_channels == 0)
1487                 return -EINVAL;
1488
1489         mutex_lock(&priv->mutex);
1490
1491         /*
1492          * If an internal scan is in progress, just set
1493          * up the scan_request as per above.
1494          */
1495         if (priv->scan_type != IWL_SCAN_NORMAL) {
1496                 IWL_DEBUG_SCAN(priv,
1497                                "SCAN request during internal scan - defer\n");
1498                 priv->scan_request = req;
1499                 priv->scan_vif = vif;
1500                 ret = 0;
1501         } else {
1502                 priv->scan_request = req;
1503                 priv->scan_vif = vif;
1504                 /*
1505                  * mac80211 will only ask for one band at a time
1506                  * so using channels[0] here is ok
1507                  */
1508                 ret = iwl_scan_initiate(priv, vif, IWL_SCAN_NORMAL,
1509                                         req->channels[0]->band);
1510                 if (ret) {
1511                         priv->scan_request = NULL;
1512                         priv->scan_vif = NULL;
1513                 }
1514         }
1515
1516         IWL_DEBUG_MAC80211(priv, "leave\n");
1517
1518         mutex_unlock(&priv->mutex);
1519
1520         return ret;
1521 }
1522
1523 static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
1524 {
1525         struct iwl_addsta_cmd cmd = {
1526                 .mode = STA_CONTROL_MODIFY_MSK,
1527                 .station_flags_msk = STA_FLG_PWR_SAVE_MSK,
1528                 .sta.sta_id = sta_id,
1529         };
1530
1531         iwl_send_add_sta(priv, &cmd, CMD_ASYNC);
1532 }
1533
1534 static void iwlagn_mac_sta_notify(struct ieee80211_hw *hw,
1535                                   struct ieee80211_vif *vif,
1536                                   enum sta_notify_cmd cmd,
1537                                   struct ieee80211_sta *sta)
1538 {
1539         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1540         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
1541         int sta_id;
1542
1543         IWL_DEBUG_MAC80211(priv, "enter\n");
1544
1545         switch (cmd) {
1546         case STA_NOTIFY_SLEEP:
1547                 WARN_ON(!sta_priv->client);
1548                 sta_priv->asleep = true;
1549                 if (atomic_read(&sta_priv->pending_frames) > 0)
1550                         ieee80211_sta_block_awake(hw, sta, true);
1551                 break;
1552         case STA_NOTIFY_AWAKE:
1553                 WARN_ON(!sta_priv->client);
1554                 if (!sta_priv->asleep)
1555                         break;
1556                 sta_priv->asleep = false;
1557                 sta_id = iwl_sta_id(sta);
1558                 if (sta_id != IWL_INVALID_STATION)
1559                         iwl_sta_modify_ps_wake(priv, sta_id);
1560                 break;
1561         default:
1562                 break;
1563         }
1564         IWL_DEBUG_MAC80211(priv, "leave\n");
1565 }
1566
1567 struct ieee80211_ops iwlagn_hw_ops = {
1568         .tx = iwlagn_mac_tx,
1569         .start = iwlagn_mac_start,
1570         .stop = iwlagn_mac_stop,
1571 #ifdef CONFIG_PM_SLEEP
1572         .suspend = iwlagn_mac_suspend,
1573         .resume = iwlagn_mac_resume,
1574         .set_wakeup = iwlagn_mac_set_wakeup,
1575 #endif
1576         .add_interface = iwlagn_mac_add_interface,
1577         .remove_interface = iwlagn_mac_remove_interface,
1578         .change_interface = iwlagn_mac_change_interface,
1579         .config = iwlagn_mac_config,
1580         .configure_filter = iwlagn_configure_filter,
1581         .set_key = iwlagn_mac_set_key,
1582         .update_tkip_key = iwlagn_mac_update_tkip_key,
1583         .set_rekey_data = iwlagn_mac_set_rekey_data,
1584         .conf_tx = iwlagn_mac_conf_tx,
1585         .bss_info_changed = iwlagn_bss_info_changed,
1586         .ampdu_action = iwlagn_mac_ampdu_action,
1587         .hw_scan = iwlagn_mac_hw_scan,
1588         .sta_notify = iwlagn_mac_sta_notify,
1589         .sta_state = iwlagn_mac_sta_state,
1590         .channel_switch = iwlagn_mac_channel_switch,
1591         .flush = iwlagn_mac_flush,
1592         .tx_last_beacon = iwlagn_mac_tx_last_beacon,
1593         .rssi_callback = iwlagn_mac_rssi_callback,
1594         .set_tim = iwlagn_mac_set_tim,
1595 };
1596
1597 /* This function both allocates and initializes hw and priv. */
1598 struct ieee80211_hw *iwl_alloc_all(void)
1599 {
1600         struct iwl_priv *priv;
1601         struct iwl_op_mode *op_mode;
1602         /* mac80211 allocates memory for this device instance, including
1603          *   space for this driver's private structure */
1604         struct ieee80211_hw *hw;
1605
1606         hw = ieee80211_alloc_hw(sizeof(struct iwl_priv) +
1607                                 sizeof(struct iwl_op_mode), &iwlagn_hw_ops);
1608         if (!hw)
1609                 goto out;
1610
1611         op_mode = hw->priv;
1612         priv = IWL_OP_MODE_GET_DVM(op_mode);
1613         priv->hw = hw;
1614
1615 out:
1616         return hw;
1617 }