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

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /******************************************************************************
   3  *
   4  * Copyright(c) 2003 - 2014 Intel Corporation. All rights reserved.
   5  * Copyright(C) 2018 - 2019, 2022 - 2024 Intel Corporation
   6  *
   7  * Portions of this file are derived from the ipw3945 project, as well
   8  * as portions of the ieee80211 subsystem header files.
   9  *****************************************************************************/
  10 #include <linux/kernel.h>
  11 #include <linux/module.h>
  12 #include <linux/slab.h>
  13 #include <linux/dma-mapping.h>
  14 #include <linux/delay.h>
  15 #include <linux/sched.h>
  16 #include <linux/skbuff.h>
  17 #include <linux/netdevice.h>
  18 #include <linux/etherdevice.h>
  19 #include <linux/if_arp.h>
  20
  21 #include <net/ieee80211_radiotap.h>
  22 #include <net/mac80211.h>
  23
  24 #include <asm/div64.h>
  25
  26 #include "iwl-io.h"
  27 #include "iwl-trans.h"
  28 #include "iwl-op-mode.h"
  29 #include "iwl-modparams.h"
  30
  31 #include "dev.h"
  32 #include "calib.h"
  33 #include "agn.h"
  34
  35 /*****************************************************************************
  36  *
  37  * mac80211 entry point functions
  38  *
  39  *****************************************************************************/
  40
  41 static const struct ieee80211_iface_limit iwlagn_sta_ap_limits[] = {
  42         {
  43                 .max = 1,
  44                 .types = BIT(NL80211_IFTYPE_STATION),
  45         },
  46         {
  47                 .max = 1,
  48                 .types = BIT(NL80211_IFTYPE_AP),
  49         },
  50 };
  51
  52 static const struct ieee80211_iface_limit iwlagn_2sta_limits[] = {
  53         {
  54                 .max = 2,
  55                 .types = BIT(NL80211_IFTYPE_STATION),
  56         },
  57 };
  58
  59 static const struct ieee80211_iface_combination
  60 iwlagn_iface_combinations_dualmode[] = {
  61         { .num_different_channels = 1,
  62           .max_interfaces = 2,
  63           .beacon_int_infra_match = true,
  64           .limits = iwlagn_sta_ap_limits,
  65           .n_limits = ARRAY_SIZE(iwlagn_sta_ap_limits),
  66         },
  67         { .num_different_channels = 1,
  68           .max_interfaces = 2,
  69           .limits = iwlagn_2sta_limits,
  70           .n_limits = ARRAY_SIZE(iwlagn_2sta_limits),
  71         },
  72 };
  73
  74 /*
  75  * Not a mac80211 entry point function, but it fits in with all the
  76  * other mac80211 functions grouped here.
  77  */
  78 int iwlagn_mac_setup_register(struct iwl_priv *priv,
  79                               const struct iwl_ucode_capabilities *capa)
  80 {
  81         int ret;
  82         struct ieee80211_hw *hw = priv->hw;
  83         struct iwl_rxon_context *ctx;
  84
  85         hw->rate_control_algorithm = "iwl-agn-rs";
  86
  87         /* Tell mac80211 our characteristics */
  88         ieee80211_hw_set(hw, SIGNAL_DBM);
  89         ieee80211_hw_set(hw, AMPDU_AGGREGATION);
  90         ieee80211_hw_set(hw, NEED_DTIM_BEFORE_ASSOC);
  91         ieee80211_hw_set(hw, SPECTRUM_MGMT);
  92         ieee80211_hw_set(hw, REPORTS_TX_ACK_STATUS);
  93         ieee80211_hw_set(hw, QUEUE_CONTROL);
  94         ieee80211_hw_set(hw, SUPPORTS_PS);
  95         ieee80211_hw_set(hw, SUPPORTS_DYNAMIC_PS);
  96         ieee80211_hw_set(hw, SUPPORT_FAST_XMIT);
  97         ieee80211_hw_set(hw, WANT_MONITOR_VIF);
  98
  99         if (priv->trans->max_skb_frags)
 100                 hw->netdev_features = NETIF_F_HIGHDMA | NETIF_F_SG;
 101
 102         hw->offchannel_tx_hw_queue = IWL_AUX_QUEUE;
 103         hw->radiotap_mcs_details |= IEEE80211_RADIOTAP_MCS_HAVE_FMT;
 104
 105         /*
 106          * Including the following line will crash some AP's.  This
 107          * workaround removes the stimulus which causes the crash until
 108          * the AP software can be fixed.
 109         hw->max_tx_aggregation_subframes = LINK_QUAL_AGG_FRAME_LIMIT_DEF;
 110          */
 111
 112         if (priv->nvm_data->sku_cap_11n_enable)
 113                 hw->wiphy->features |= NL80211_FEATURE_DYNAMIC_SMPS |
 114                                        NL80211_FEATURE_STATIC_SMPS;
 115
 116         /*
 117          * Enable 11w if advertised by firmware and software crypto
 118          * is not enabled (as the firmware will interpret some mgmt
 119          * packets, so enabling it with software crypto isn't safe)
 120          */
 121         if (priv->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_MFP &&
 122             !iwlwifi_mod_params.swcrypto)
 123                 ieee80211_hw_set(hw, MFP_CAPABLE);
 124
 125         hw->sta_data_size = sizeof(struct iwl_station_priv);
 126         hw->vif_data_size = sizeof(struct iwl_vif_priv);
 127
 128         for_each_context(priv, ctx) {
 129                 hw->wiphy->interface_modes |= ctx->interface_modes;
 130                 hw->wiphy->interface_modes |= ctx->exclusive_interface_modes;
 131         }
 132
 133         BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
 134
 135         if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
 136                 hw->wiphy->iface_combinations =
 137                         iwlagn_iface_combinations_dualmode;
 138                 hw->wiphy->n_iface_combinations =
 139                         ARRAY_SIZE(iwlagn_iface_combinations_dualmode);
 140         }
 141
 142         hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
 143         hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG |
 144                                        REGULATORY_DISABLE_BEACON_HINTS;
 145
 146 #ifdef CONFIG_PM_SLEEP
 147         if (priv->fw->img[IWL_UCODE_WOWLAN].num_sec &&
 148             device_can_wakeup(priv->trans->dev)) {
 149                 priv->wowlan_support.flags = WIPHY_WOWLAN_MAGIC_PKT |
 150                                              WIPHY_WOWLAN_DISCONNECT |
 151                                              WIPHY_WOWLAN_EAP_IDENTITY_REQ |
 152                                              WIPHY_WOWLAN_RFKILL_RELEASE;
 153                 if (!iwlwifi_mod_params.swcrypto)
 154                         priv->wowlan_support.flags |=
 155                                 WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
 156                                 WIPHY_WOWLAN_GTK_REKEY_FAILURE;
 157
 158                 priv->wowlan_support.n_patterns = IWLAGN_WOWLAN_MAX_PATTERNS;
 159                 priv->wowlan_support.pattern_min_len =
 160                                         IWLAGN_WOWLAN_MIN_PATTERN_LEN;
 161                 priv->wowlan_support.pattern_max_len =
 162                                         IWLAGN_WOWLAN_MAX_PATTERN_LEN;
 163                 hw->wiphy->wowlan = &priv->wowlan_support;
 164         }
 165 #endif
 166
 167         if (iwlwifi_mod_params.power_save)
 168                 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
 169         else
 170                 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
 171
 172         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
 173         /* we create the 802.11 header and a max-length SSID element */
 174         hw->wiphy->max_scan_ie_len = capa->max_probe_length - 24 - 34;
 175
 176         /*
 177          * We don't use all queues: 4 and 9 are unused and any
 178          * aggregation queue gets mapped down to the AC queue.
 179          */
 180         hw->queues = IWLAGN_FIRST_AMPDU_QUEUE;
 181
 182         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
 183
 184         if (priv->nvm_data->bands[NL80211_BAND_2GHZ].n_channels)
 185                 priv->hw->wiphy->bands[NL80211_BAND_2GHZ] =
 186                         &priv->nvm_data->bands[NL80211_BAND_2GHZ];
 187         if (priv->nvm_data->bands[NL80211_BAND_5GHZ].n_channels)
 188                 priv->hw->wiphy->bands[NL80211_BAND_5GHZ] =
 189                         &priv->nvm_data->bands[NL80211_BAND_5GHZ];
 190
 191         hw->wiphy->hw_version = priv->trans->hw_id;
 192
 193         iwl_leds_init(priv);
 194
 195         wiphy_ext_feature_set(hw->wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST);
 196         wiphy_ext_feature_set(hw->wiphy, NL80211_EXT_FEATURE_EXT_KEY_ID);
 197
 198         ret = ieee80211_register_hw(priv->hw);
 199         if (ret) {
 200                 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
 201                 iwl_leds_exit(priv);
 202                 return ret;
 203         }
 204         priv->mac80211_registered = 1;
 205
 206         return 0;
 207 }
 208
 209 void iwlagn_mac_unregister(struct iwl_priv *priv)
 210 {
 211         if (!priv->mac80211_registered)
 212                 return;
 213         iwl_leds_exit(priv);
 214         ieee80211_unregister_hw(priv->hw);
 215         priv->mac80211_registered = 0;
 216 }
 217
 218 static int __iwl_up(struct iwl_priv *priv)
 219 {
 220         struct iwl_rxon_context *ctx;
 221         int ret;
 222
 223         lockdep_assert_held(&priv->mutex);
 224
 225         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
 226                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
 227                 return -EIO;
 228         }
 229
 230         for_each_context(priv, ctx) {
 231                 ret = iwlagn_alloc_bcast_station(priv, ctx);
 232                 if (ret) {
 233                         iwl_dealloc_bcast_stations(priv);
 234                         return ret;
 235                 }
 236         }
 237
 238         ret = iwl_trans_start_hw(priv->trans);
 239         if (ret) {
 240                 IWL_ERR(priv, "Failed to start HW: %d\n", ret);
 241                 goto error;
 242         }
 243
 244         ret = iwl_run_init_ucode(priv);
 245         if (ret) {
 246                 IWL_ERR(priv, "Failed to run INIT ucode: %d\n", ret);
 247                 goto error;
 248         }
 249
 250         ret = iwl_trans_start_hw(priv->trans);
 251         if (ret) {
 252                 IWL_ERR(priv, "Failed to start HW: %d\n", ret);
 253                 goto error;
 254         }
 255
 256         ret = iwl_load_ucode_wait_alive(priv, IWL_UCODE_REGULAR);
 257         if (ret) {
 258                 IWL_ERR(priv, "Failed to start RT ucode: %d\n", ret);
 259                 goto error;
 260         }
 261
 262         ret = iwl_alive_start(priv);
 263         if (ret)
 264                 goto error;
 265         return 0;
 266
 267  error:
 268         set_bit(STATUS_EXIT_PENDING, &priv->status);
 269         iwl_down(priv);
 270         clear_bit(STATUS_EXIT_PENDING, &priv->status);
 271
 272         IWL_ERR(priv, "Unable to initialize device.\n");
 273         return ret;
 274 }
 275
 276 static int iwlagn_mac_start(struct ieee80211_hw *hw)
 277 {
 278         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 279         int ret;
 280
 281         IWL_DEBUG_MAC80211(priv, "enter\n");
 282
 283         /* we should be verifying the device is ready to be opened */
 284         mutex_lock(&priv->mutex);
 285         ret = __iwl_up(priv);
 286         mutex_unlock(&priv->mutex);
 287         if (ret)
 288                 return ret;
 289
 290         IWL_DEBUG_INFO(priv, "Start UP work done.\n");
 291
 292         /* Now we should be done, and the READY bit should be set. */
 293         if (WARN_ON(!test_bit(STATUS_READY, &priv->status)))
 294                 ret = -EIO;
 295
 296         iwlagn_led_enable(priv);
 297
 298         priv->is_open = 1;
 299         IWL_DEBUG_MAC80211(priv, "leave\n");
 300         return ret;
 301 }
 302
 303 static void iwlagn_mac_stop(struct ieee80211_hw *hw, bool suspend)
 304 {
 305         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 306
 307         IWL_DEBUG_MAC80211(priv, "enter\n");
 308
 309         if (!priv->is_open)
 310                 return;
 311
 312         priv->is_open = 0;
 313
 314         mutex_lock(&priv->mutex);
 315         iwl_down(priv);
 316         mutex_unlock(&priv->mutex);
 317
 318         iwl_cancel_deferred_work(priv);
 319
 320         flush_workqueue(priv->workqueue);
 321
 322         IWL_DEBUG_MAC80211(priv, "leave\n");
 323 }
 324
 325 static void iwlagn_mac_set_rekey_data(struct ieee80211_hw *hw,
 326                                       struct ieee80211_vif *vif,
 327                                       struct cfg80211_gtk_rekey_data *data)
 328 {
 329         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 330
 331         if (iwlwifi_mod_params.swcrypto)
 332                 return;
 333
 334         IWL_DEBUG_MAC80211(priv, "enter\n");
 335         mutex_lock(&priv->mutex);
 336
 337         if (priv->contexts[IWL_RXON_CTX_BSS].vif != vif)
 338                 goto out;
 339
 340         memcpy(priv->kek, data->kek, NL80211_KEK_LEN);
 341         memcpy(priv->kck, data->kck, NL80211_KCK_LEN);
 342         priv->replay_ctr =
 343                 cpu_to_le64(be64_to_cpup((__be64 *)&data->replay_ctr));
 344         priv->have_rekey_data = true;
 345
 346  out:
 347         mutex_unlock(&priv->mutex);
 348         IWL_DEBUG_MAC80211(priv, "leave\n");
 349 }
 350
 351 #ifdef CONFIG_PM_SLEEP
 352
 353 static int iwlagn_mac_suspend(struct ieee80211_hw *hw,
 354                               struct cfg80211_wowlan *wowlan)
 355 {
 356         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 357         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 358         int ret;
 359
 360         if (WARN_ON(!wowlan))
 361                 return -EINVAL;
 362
 363         IWL_DEBUG_MAC80211(priv, "enter\n");
 364         mutex_lock(&priv->mutex);
 365
 366         /* Don't attempt WoWLAN when not associated, tear down instead. */
 367         if (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION ||
 368             !iwl_is_associated_ctx(ctx)) {
 369                 ret = 1;
 370                 goto out;
 371         }
 372
 373         ret = iwlagn_suspend(priv, wowlan);
 374         if (ret)
 375                 goto error;
 376
 377         /* let the ucode operate on its own */
 378         iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_SET,
 379                     CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE);
 380
 381         iwl_trans_d3_suspend(priv->trans, false, true);
 382
 383         goto out;
 384
 385  error:
 386         priv->wowlan = false;
 387         iwlagn_prepare_restart(priv);
 388         ieee80211_restart_hw(priv->hw);
 389  out:
 390         mutex_unlock(&priv->mutex);
 391         IWL_DEBUG_MAC80211(priv, "leave\n");
 392
 393         return ret;
 394 }
 395
 396 struct iwl_resume_data {
 397         struct iwl_priv *priv;
 398         struct iwlagn_wowlan_status *cmd;
 399         bool valid;
 400 };
 401
 402 static bool iwl_resume_status_fn(struct iwl_notif_wait_data *notif_wait,
 403                                  struct iwl_rx_packet *pkt, void *data)
 404 {
 405         struct iwl_resume_data *resume_data = data;
 406         struct iwl_priv *priv = resume_data->priv;
 407
 408         if (iwl_rx_packet_payload_len(pkt) != sizeof(*resume_data->cmd)) {
 409                 IWL_ERR(priv, "rx wrong size data\n");
 410                 return true;
 411         }
 412         memcpy(resume_data->cmd, pkt->data, sizeof(*resume_data->cmd));
 413         resume_data->valid = true;
 414
 415         return true;
 416 }
 417
 418 static int iwlagn_mac_resume(struct ieee80211_hw *hw)
 419 {
 420         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 421         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 422         struct ieee80211_vif *vif;
 423         u32 base;
 424         int ret;
 425         enum iwl_d3_status d3_status;
 426         struct error_table_start {
 427                 /* cf. struct iwl_error_event_table */
 428                 u32 valid;
 429                 u32 error_id;
 430         } err_info;
 431         struct iwl_notification_wait status_wait;
 432         static const u16 status_cmd[] = {
 433                 REPLY_WOWLAN_GET_STATUS,
 434         };
 435         struct iwlagn_wowlan_status status_data = {};
 436         struct iwl_resume_data resume_data = {
 437                 .priv = priv,
 438                 .cmd = &status_data,
 439                 .valid = false,
 440         };
 441         struct cfg80211_wowlan_wakeup wakeup = {
 442                 .pattern_idx = -1,
 443         };
 444 #ifdef CONFIG_IWLWIFI_DEBUGFS
 445         const struct fw_img *img;
 446 #endif
 447
 448         IWL_DEBUG_MAC80211(priv, "enter\n");
 449         mutex_lock(&priv->mutex);
 450
 451         /* we'll clear ctx->vif during iwlagn_prepare_restart() */
 452         vif = ctx->vif;
 453
 454         ret = iwl_trans_d3_resume(priv->trans, &d3_status, false, true);
 455         if (ret)
 456                 goto out_unlock;
 457
 458         if (d3_status != IWL_D3_STATUS_ALIVE) {
 459                 IWL_INFO(priv, "Device was reset during suspend\n");
 460                 goto out_unlock;
 461         }
 462
 463         /* uCode is no longer operating by itself */
 464         iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_CLR,
 465                     CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE);
 466
 467         base = priv->device_pointers.error_event_table;
 468         if (!iwlagn_hw_valid_rtc_data_addr(base)) {
 469                 IWL_WARN(priv, "Invalid error table during resume!\n");
 470                 goto out_unlock;
 471         }
 472
 473         iwl_trans_read_mem_bytes(priv->trans, base,
 474                                  &err_info, sizeof(err_info));
 475
 476         if (err_info.valid) {
 477                 IWL_INFO(priv, "error table is valid (%d, 0x%x)\n",
 478                          err_info.valid, err_info.error_id);
 479                 if (err_info.error_id == RF_KILL_INDICATOR_FOR_WOWLAN) {
 480                         wakeup.rfkill_release = true;
 481                         ieee80211_report_wowlan_wakeup(vif, &wakeup,
 482                                                        GFP_KERNEL);
 483                 }
 484                 goto out_unlock;
 485         }
 486
 487 #ifdef CONFIG_IWLWIFI_DEBUGFS
 488         img = &priv->fw->img[IWL_UCODE_WOWLAN];
 489         if (!priv->wowlan_sram)
 490                 priv->wowlan_sram =
 491                         kzalloc(img->sec[IWL_UCODE_SECTION_DATA].len,
 492                                 GFP_KERNEL);
 493
 494         if (priv->wowlan_sram)
 495                 iwl_trans_read_mem(priv->trans, 0x800000,
 496                                    priv->wowlan_sram,
 497                                    img->sec[IWL_UCODE_SECTION_DATA].len / 4);
 498 #endif
 499
 500         /*
 501          * This is very strange. The GET_STATUS command is sent but the device
 502          * doesn't reply properly, it seems it doesn't close the RBD so one is
 503          * always left open ... As a result, we need to send another command
 504          * and have to reset the driver afterwards. As we need to switch to
 505          * runtime firmware again that'll happen.
 506          */
 507
 508         iwl_init_notification_wait(&priv->notif_wait, &status_wait, status_cmd,
 509                                    ARRAY_SIZE(status_cmd), iwl_resume_status_fn,
 510                                    &resume_data);
 511
 512         iwl_dvm_send_cmd_pdu(priv, REPLY_WOWLAN_GET_STATUS, CMD_ASYNC, 0, NULL);
 513         iwl_dvm_send_cmd_pdu(priv, REPLY_ECHO, CMD_ASYNC, 0, NULL);
 514         /* an RBD is left open in the firmware now! */
 515
 516         ret = iwl_wait_notification(&priv->notif_wait, &status_wait, HZ/5);
 517         if (ret)
 518                 goto out_unlock;
 519
 520         if (resume_data.valid && priv->contexts[IWL_RXON_CTX_BSS].vif) {
 521                 u32 reasons = le32_to_cpu(status_data.wakeup_reason);
 522                 struct cfg80211_wowlan_wakeup *wakeup_report;
 523
 524                 IWL_INFO(priv, "WoWLAN wakeup reason(s): 0x%.8x\n", reasons);
 525
 526                 if (reasons) {
 527                         if (reasons & IWLAGN_WOWLAN_WAKEUP_MAGIC_PACKET)
 528                                 wakeup.magic_pkt = true;
 529                         if (reasons & IWLAGN_WOWLAN_WAKEUP_PATTERN_MATCH)
 530                                 wakeup.pattern_idx = status_data.pattern_number;
 531                         if (reasons & (IWLAGN_WOWLAN_WAKEUP_BEACON_MISS |
 532                                        IWLAGN_WOWLAN_WAKEUP_LINK_CHANGE))
 533                                 wakeup.disconnect = true;
 534                         if (reasons & IWLAGN_WOWLAN_WAKEUP_GTK_REKEY_FAIL)
 535                                 wakeup.gtk_rekey_failure = true;
 536                         if (reasons & IWLAGN_WOWLAN_WAKEUP_EAP_IDENT_REQ)
 537                                 wakeup.eap_identity_req = true;
 538                         if (reasons & IWLAGN_WOWLAN_WAKEUP_4WAY_HANDSHAKE)
 539                                 wakeup.four_way_handshake = true;
 540                         wakeup_report = &wakeup;
 541                 } else {
 542                         wakeup_report = NULL;
 543                 }
 544
 545                 ieee80211_report_wowlan_wakeup(vif, wakeup_report, GFP_KERNEL);
 546         }
 547
 548         priv->wowlan = false;
 549
 550         iwlagn_prepare_restart(priv);
 551
 552         memset((void *)&ctx->active, 0, sizeof(ctx->active));
 553         iwl_connection_init_rx_config(priv, ctx);
 554         iwlagn_set_rxon_chain(priv, ctx);
 555
 556  out_unlock:
 557         mutex_unlock(&priv->mutex);
 558         IWL_DEBUG_MAC80211(priv, "leave\n");
 559
 560         ieee80211_resume_disconnect(vif);
 561
 562         return 1;
 563 }
 564
 565 static void iwlagn_mac_set_wakeup(struct ieee80211_hw *hw, bool enabled)
 566 {
 567         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 568
 569         device_set_wakeup_enable(priv->trans->dev, enabled);
 570 }
 571 #endif
 572
 573 static void iwlagn_mac_tx(struct ieee80211_hw *hw,
 574                           struct ieee80211_tx_control *control,
 575                           struct sk_buff *skb)
 576 {
 577         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 578
 579         if (iwlagn_tx_skb(priv, control->sta, skb))
 580                 ieee80211_free_txskb(hw, skb);
 581 }
 582
 583 static void iwlagn_mac_update_tkip_key(struct ieee80211_hw *hw,
 584                                        struct ieee80211_vif *vif,
 585                                        struct ieee80211_key_conf *keyconf,
 586                                        struct ieee80211_sta *sta,
 587                                        u32 iv32, u16 *phase1key)
 588 {
 589         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 590
 591         iwl_update_tkip_key(priv, vif, keyconf, sta, iv32, phase1key);
 592 }
 593
 594 static int iwlagn_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
 595                               struct ieee80211_vif *vif,
 596                               struct ieee80211_sta *sta,
 597                               struct ieee80211_key_conf *key)
 598 {
 599         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 600         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
 601         struct iwl_rxon_context *ctx = vif_priv->ctx;
 602         int ret;
 603         bool is_default_wep_key = false;
 604
 605         IWL_DEBUG_MAC80211(priv, "enter\n");
 606
 607         if (iwlwifi_mod_params.swcrypto) {
 608                 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");
 609                 return -EOPNOTSUPP;
 610         }
 611
 612         switch (key->cipher) {
 613         case WLAN_CIPHER_SUITE_TKIP:
 614                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
 615                 fallthrough;
 616         case WLAN_CIPHER_SUITE_CCMP:
 617                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 618                 break;
 619         default:
 620                 break;
 621         }
 622
 623         /*
 624          * We could program these keys into the hardware as well, but we
 625          * don't expect much multicast traffic in IBSS and having keys
 626          * for more stations is probably more useful.
 627          *
 628          * Mark key TX-only and return 0.
 629          */
 630         if (vif->type == NL80211_IFTYPE_ADHOC &&
 631             !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
 632                 key->hw_key_idx = WEP_INVALID_OFFSET;
 633                 return 0;
 634         }
 635
 636         /* If they key was TX-only, accept deletion */
 637         if (cmd == DISABLE_KEY && key->hw_key_idx == WEP_INVALID_OFFSET)
 638                 return 0;
 639
 640         mutex_lock(&priv->mutex);
 641         iwl_scan_cancel_timeout(priv, 100);
 642
 643         BUILD_BUG_ON(WEP_INVALID_OFFSET == IWLAGN_HW_KEY_DEFAULT);
 644
 645         /*
 646          * If we are getting WEP group key and we didn't receive any key mapping
 647          * so far, we are in legacy wep mode (group key only), otherwise we are
 648          * in 1X mode.
 649          * In legacy wep mode, we use another host command to the uCode.
 650          */
 651         if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
 652              key->cipher == WLAN_CIPHER_SUITE_WEP104) && !sta) {
 653                 if (cmd == SET_KEY)
 654                         is_default_wep_key = !ctx->key_mapping_keys;
 655                 else
 656                         is_default_wep_key =
 657                                 key->hw_key_idx == IWLAGN_HW_KEY_DEFAULT;
 658         }
 659
 660
 661         switch (cmd) {
 662         case SET_KEY:
 663                 if (is_default_wep_key) {
 664                         ret = iwl_set_default_wep_key(priv, vif_priv->ctx, key);
 665                         break;
 666                 }
 667                 ret = iwl_set_dynamic_key(priv, vif_priv->ctx, key, sta);
 668                 if (ret) {
 669                         /*
 670                          * can't add key for RX, but we don't need it
 671                          * in the device for TX so still return 0
 672                          */
 673                         ret = 0;
 674                         key->hw_key_idx = WEP_INVALID_OFFSET;
 675                 }
 676
 677                 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");
 678                 break;
 679         case DISABLE_KEY:
 680                 if (is_default_wep_key)
 681                         ret = iwl_remove_default_wep_key(priv, ctx, key);
 682                 else
 683                         ret = iwl_remove_dynamic_key(priv, ctx, key, sta);
 684
 685                 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");
 686                 break;
 687         default:
 688                 ret = -EINVAL;
 689         }
 690
 691         mutex_unlock(&priv->mutex);
 692         IWL_DEBUG_MAC80211(priv, "leave\n");
 693
 694         return ret;
 695 }
 696
 697 static int iwlagn_mac_ampdu_action(struct ieee80211_hw *hw,
 698                                    struct ieee80211_vif *vif,
 699                                    struct ieee80211_ampdu_params *params)
 700 {
 701         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 702         int ret = -EINVAL;
 703         struct ieee80211_sta *sta = params->sta;
 704         enum ieee80211_ampdu_mlme_action action = params->action;
 705         u16 tid = params->tid;
 706         u16 *ssn = &params->ssn;
 707         u8 buf_size = params->buf_size;
 708         struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;
 709
 710         IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n",
 711                      sta->addr, tid);
 712
 713         if (!(priv->nvm_data->sku_cap_11n_enable))
 714                 return -EACCES;
 715
 716         IWL_DEBUG_MAC80211(priv, "enter\n");
 717         mutex_lock(&priv->mutex);
 718
 719         switch (action) {
 720         case IEEE80211_AMPDU_RX_START:
 721                 if (!iwl_enable_rx_ampdu())
 722                         break;
 723                 IWL_DEBUG_HT(priv, "start Rx\n");
 724                 ret = iwl_sta_rx_agg_start(priv, sta, tid, *ssn);
 725                 break;
 726         case IEEE80211_AMPDU_RX_STOP:
 727                 IWL_DEBUG_HT(priv, "stop Rx\n");
 728                 ret = iwl_sta_rx_agg_stop(priv, sta, tid);
 729                 break;
 730         case IEEE80211_AMPDU_TX_START:
 731                 if (!iwl_enable_tx_ampdu())
 732                         break;
 733                 IWL_DEBUG_HT(priv, "start Tx\n");
 734                 ret = iwlagn_tx_agg_start(priv, vif, sta, tid, ssn);
 735                 break;
 736         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 737         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 738                 IWL_DEBUG_HT(priv, "Flush Tx\n");
 739                 ret = iwlagn_tx_agg_flush(priv, vif, sta, tid);
 740                 break;
 741         case IEEE80211_AMPDU_TX_STOP_CONT:
 742                 IWL_DEBUG_HT(priv, "stop Tx\n");
 743                 ret = iwlagn_tx_agg_stop(priv, vif, sta, tid);
 744                 if ((ret == 0) && (priv->agg_tids_count > 0)) {
 745                         priv->agg_tids_count--;
 746                         IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n",
 747                                      priv->agg_tids_count);
 748                 }
 749                 if (!priv->agg_tids_count &&
 750                     priv->hw_params.use_rts_for_aggregation) {
 751                         /*
 752                          * switch off RTS/CTS if it was previously enabled
 753                          */
 754                         sta_priv->lq_sta.lq.general_params.flags &=
 755                                 ~LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
 756                         iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif),
 757                                         &sta_priv->lq_sta.lq, CMD_ASYNC, false);
 758                 }
 759                 break;
 760         case IEEE80211_AMPDU_TX_OPERATIONAL:
 761                 ret = iwlagn_tx_agg_oper(priv, vif, sta, tid, buf_size);
 762                 break;
 763         }
 764         mutex_unlock(&priv->mutex);
 765         IWL_DEBUG_MAC80211(priv, "leave\n");
 766         return ret;
 767 }
 768
 769 static int iwlagn_mac_sta_add(struct ieee80211_hw *hw,
 770                               struct ieee80211_vif *vif,
 771                               struct ieee80211_sta *sta)
 772 {
 773         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 774         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
 775         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
 776         bool is_ap = vif->type == NL80211_IFTYPE_STATION;
 777         int ret;
 778         u8 sta_id;
 779
 780         IWL_DEBUG_INFO(priv, "proceeding to add station %pM\n",
 781                         sta->addr);
 782         sta_priv->sta_id = IWL_INVALID_STATION;
 783
 784         atomic_set(&sta_priv->pending_frames, 0);
 785         if (vif->type == NL80211_IFTYPE_AP)
 786                 sta_priv->client = true;
 787
 788         ret = iwl_add_station_common(priv, vif_priv->ctx, sta->addr,
 789                                      is_ap, sta, &sta_id);
 790         if (ret) {
 791                 IWL_ERR(priv, "Unable to add station %pM (%d)\n",
 792                         sta->addr, ret);
 793                 /* Should we return success if return code is EEXIST ? */
 794                 return ret;
 795         }
 796
 797         sta_priv->sta_id = sta_id;
 798
 799         return 0;
 800 }
 801
 802 static int iwlagn_mac_sta_remove(struct ieee80211_hw *hw,
 803                                  struct ieee80211_vif *vif,
 804                                  struct ieee80211_sta *sta)
 805 {
 806         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 807         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
 808         int ret;
 809
 810         IWL_DEBUG_INFO(priv, "proceeding to remove station %pM\n", sta->addr);
 811
 812         if (vif->type == NL80211_IFTYPE_STATION) {
 813                 /*
 814                  * Station will be removed from device when the RXON
 815                  * is set to unassociated -- just deactivate it here
 816                  * to avoid re-programming it.
 817                  */
 818                 ret = 0;
 819                 iwl_deactivate_station(priv, sta_priv->sta_id, sta->addr);
 820         } else {
 821                 ret = iwl_remove_station(priv, sta_priv->sta_id, sta->addr);
 822                 if (ret)
 823                         IWL_DEBUG_QUIET_RFKILL(priv,
 824                                 "Error removing station %pM\n", sta->addr);
 825         }
 826         return ret;
 827 }
 828
 829 static int iwlagn_mac_sta_state(struct ieee80211_hw *hw,
 830                                 struct ieee80211_vif *vif,
 831                                 struct ieee80211_sta *sta,
 832                                 enum ieee80211_sta_state old_state,
 833                                 enum ieee80211_sta_state new_state)
 834 {
 835         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 836         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
 837         enum {
 838                 NONE, ADD, REMOVE, HT_RATE_INIT, ADD_RATE_INIT,
 839         } op = NONE;
 840         int ret;
 841
 842         IWL_DEBUG_MAC80211(priv, "station %pM state change %d->%d\n",
 843                            sta->addr, old_state, new_state);
 844
 845         mutex_lock(&priv->mutex);
 846         if (vif->type == NL80211_IFTYPE_STATION) {
 847                 if (old_state == IEEE80211_STA_NOTEXIST &&
 848                     new_state == IEEE80211_STA_NONE)
 849                         op = ADD;
 850                 else if (old_state == IEEE80211_STA_NONE &&
 851                          new_state == IEEE80211_STA_NOTEXIST)
 852                         op = REMOVE;
 853                 else if (old_state == IEEE80211_STA_AUTH &&
 854                          new_state == IEEE80211_STA_ASSOC)
 855                         op = HT_RATE_INIT;
 856         } else {
 857                 if (old_state == IEEE80211_STA_AUTH &&
 858                     new_state == IEEE80211_STA_ASSOC)
 859                         op = ADD_RATE_INIT;
 860                 else if (old_state == IEEE80211_STA_ASSOC &&
 861                          new_state == IEEE80211_STA_AUTH)
 862                         op = REMOVE;
 863         }
 864
 865         switch (op) {
 866         case ADD:
 867                 ret = iwlagn_mac_sta_add(hw, vif, sta);
 868                 if (ret)
 869                         break;
 870                 /*
 871                  * Clear the in-progress flag, the AP station entry was added
 872                  * but we'll initialize LQ only when we've associated (which
 873                  * would also clear the in-progress flag). This is necessary
 874                  * in case we never initialize LQ because association fails.
 875                  */
 876                 spin_lock_bh(&priv->sta_lock);
 877                 priv->stations[iwl_sta_id(sta)].used &=
 878                         ~IWL_STA_UCODE_INPROGRESS;
 879                 spin_unlock_bh(&priv->sta_lock);
 880                 break;
 881         case REMOVE:
 882                 ret = iwlagn_mac_sta_remove(hw, vif, sta);
 883                 break;
 884         case ADD_RATE_INIT:
 885                 ret = iwlagn_mac_sta_add(hw, vif, sta);
 886                 if (ret)
 887                         break;
 888                 /* Initialize rate scaling */
 889                 IWL_DEBUG_INFO(priv,
 890                                "Initializing rate scaling for station %pM\n",
 891                                sta->addr);
 892                 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta));
 893                 ret = 0;
 894                 break;
 895         case HT_RATE_INIT:
 896                 /* Initialize rate scaling */
 897                 ret = iwl_sta_update_ht(priv, vif_priv->ctx, sta);
 898                 if (ret)
 899                         break;
 900                 IWL_DEBUG_INFO(priv,
 901                                "Initializing rate scaling for station %pM\n",
 902                                sta->addr);
 903                 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta));
 904                 ret = 0;
 905                 break;
 906         default:
 907                 ret = 0;
 908                 break;
 909         }
 910
 911         /*
 912          * mac80211 might WARN if we fail, but due the way we
 913          * (badly) handle hard rfkill, we might fail here
 914          */
 915         if (iwl_is_rfkill(priv))
 916                 ret = 0;
 917
 918         mutex_unlock(&priv->mutex);
 919         IWL_DEBUG_MAC80211(priv, "leave\n");
 920
 921         return ret;
 922 }
 923
 924 static void iwlagn_mac_channel_switch(struct ieee80211_hw *hw,
 925                                       struct ieee80211_vif *vif,
 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, 0);
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, 0);
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, 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 |
1073                         FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
1074 }
1075
1076 static void iwlagn_mac_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1077                              u32 queues, bool drop)
1078 {
1079         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1080         u32 scd_queues;
1081
1082         mutex_lock(&priv->mutex);
1083         IWL_DEBUG_MAC80211(priv, "enter\n");
1084
1085         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1086                 IWL_DEBUG_TX(priv, "Aborting flush due to device shutdown\n");
1087                 goto done;
1088         }
1089         if (iwl_is_rfkill(priv)) {
1090                 IWL_DEBUG_TX(priv, "Aborting flush due to RF Kill\n");
1091                 goto done;
1092         }
1093
1094         scd_queues = BIT(priv->trans->trans_cfg->base_params->num_of_queues) - 1;
1095         scd_queues &= ~(BIT(IWL_IPAN_CMD_QUEUE_NUM) |
1096                         BIT(IWL_DEFAULT_CMD_QUEUE_NUM));
1097
1098         if (drop) {
1099                 IWL_DEBUG_TX_QUEUES(priv, "Flushing SCD queues: 0x%x\n",
1100                                     scd_queues);
1101                 if (iwlagn_txfifo_flush(priv, scd_queues)) {
1102                         IWL_ERR(priv, "flush request fail\n");
1103                         goto done;
1104                 }
1105         }
1106
1107         IWL_DEBUG_TX_QUEUES(priv, "wait transmit/flush all frames\n");
1108         iwl_trans_wait_tx_queues_empty(priv->trans, scd_queues);
1109 done:
1110         mutex_unlock(&priv->mutex);
1111         IWL_DEBUG_MAC80211(priv, "leave\n");
1112 }
1113
1114 static void iwlagn_mac_event_callback(struct ieee80211_hw *hw,
1115                                       struct ieee80211_vif *vif,
1116                                       const struct ieee80211_event *event)
1117 {
1118         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1119
1120         if (event->type != RSSI_EVENT)
1121                 return;
1122
1123         IWL_DEBUG_MAC80211(priv, "enter\n");
1124
1125         if (priv->lib->bt_params &&
1126             priv->lib->bt_params->advanced_bt_coexist) {
1127                 if (event->u.rssi.data == RSSI_EVENT_LOW)
1128                         priv->bt_enable_pspoll = true;
1129                 else if (event->u.rssi.data == RSSI_EVENT_HIGH)
1130                         priv->bt_enable_pspoll = false;
1131
1132                 queue_work(priv->workqueue, &priv->bt_runtime_config);
1133         } else {
1134                 IWL_DEBUG_MAC80211(priv, "Advanced BT coex disabled,"
1135                                 "ignoring RSSI callback\n");
1136         }
1137
1138         IWL_DEBUG_MAC80211(priv, "leave\n");
1139 }
1140
1141 static int iwlagn_mac_set_tim(struct ieee80211_hw *hw,
1142                               struct ieee80211_sta *sta, bool set)
1143 {
1144         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1145
1146         queue_work(priv->workqueue, &priv->beacon_update);
1147
1148         return 0;
1149 }
1150
1151 static int iwlagn_mac_conf_tx(struct ieee80211_hw *hw,
1152                               struct ieee80211_vif *vif,
1153                               unsigned int link_id, u16 queue,
1154                               const struct ieee80211_tx_queue_params *params)
1155 {
1156         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1157         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1158         struct iwl_rxon_context *ctx = vif_priv->ctx;
1159         int q;
1160
1161         if (WARN_ON(!ctx))
1162                 return -EINVAL;
1163
1164         IWL_DEBUG_MAC80211(priv, "enter\n");
1165
1166         if (!iwl_is_ready_rf(priv)) {
1167                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1168                 return -EIO;
1169         }
1170
1171         if (queue >= AC_NUM) {
1172                 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1173                 return 0;
1174         }
1175
1176         q = AC_NUM - 1 - queue;
1177
1178         mutex_lock(&priv->mutex);
1179
1180         ctx->qos_data.def_qos_parm.ac[q].cw_min =
1181                 cpu_to_le16(params->cw_min);
1182         ctx->qos_data.def_qos_parm.ac[q].cw_max =
1183                 cpu_to_le16(params->cw_max);
1184         ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1185         ctx->qos_data.def_qos_parm.ac[q].edca_txop =
1186                         cpu_to_le16((params->txop * 32));
1187
1188         ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1189
1190         mutex_unlock(&priv->mutex);
1191
1192         IWL_DEBUG_MAC80211(priv, "leave\n");
1193         return 0;
1194 }
1195
1196 static int iwlagn_mac_tx_last_beacon(struct ieee80211_hw *hw)
1197 {
1198         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1199
1200         return priv->ibss_manager == IWL_IBSS_MANAGER;
1201 }
1202
1203 static int iwl_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1204 {
1205         iwl_connection_init_rx_config(priv, ctx);
1206
1207         iwlagn_set_rxon_chain(priv, ctx);
1208
1209         return iwlagn_commit_rxon(priv, ctx);
1210 }
1211
1212 static int iwl_setup_interface(struct iwl_priv *priv,
1213                                struct iwl_rxon_context *ctx)
1214 {
1215         struct ieee80211_vif *vif = ctx->vif;
1216         int err, ac;
1217
1218         lockdep_assert_held(&priv->mutex);
1219
1220         /*
1221          * This variable will be correct only when there's just
1222          * a single context, but all code using it is for hardware
1223          * that supports only one context.
1224          */
1225         priv->iw_mode = vif->type;
1226
1227         ctx->is_active = true;
1228
1229         err = iwl_set_mode(priv, ctx);
1230         if (err) {
1231                 if (!ctx->always_active)
1232                         ctx->is_active = false;
1233                 return err;
1234         }
1235
1236         if (priv->lib->bt_params && priv->lib->bt_params->advanced_bt_coexist &&
1237             vif->type == NL80211_IFTYPE_ADHOC) {
1238                 /*
1239                  * pretend to have high BT traffic as long as we
1240                  * are operating in IBSS mode, as this will cause
1241                  * the rate scaling etc. to behave as intended.
1242                  */
1243                 priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH;
1244         }
1245
1246         /* set up queue mappings */
1247         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
1248                 vif->hw_queue[ac] = ctx->ac_to_queue[ac];
1249
1250         if (vif->type == NL80211_IFTYPE_AP)
1251                 vif->cab_queue = ctx->mcast_queue;
1252         else
1253                 vif->cab_queue = IEEE80211_INVAL_HW_QUEUE;
1254
1255         return 0;
1256 }
1257
1258 static int iwlagn_mac_add_interface(struct ieee80211_hw *hw,
1259                                     struct ieee80211_vif *vif)
1260 {
1261         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1262         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1263         struct iwl_rxon_context *tmp, *ctx = NULL;
1264         int err;
1265         enum nl80211_iftype viftype = ieee80211_vif_type_p2p(vif);
1266         bool reset = false;
1267
1268         IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n",
1269                            viftype, vif->addr);
1270
1271         mutex_lock(&priv->mutex);
1272
1273         if (!iwl_is_ready_rf(priv)) {
1274                 IWL_WARN(priv, "Try to add interface when device not ready\n");
1275                 err = -EINVAL;
1276                 goto out;
1277         }
1278
1279         for_each_context(priv, tmp) {
1280                 u32 possible_modes =
1281                         tmp->interface_modes | tmp->exclusive_interface_modes;
1282
1283                 if (tmp->vif) {
1284                         /* On reset we need to add the same interface again */
1285                         if (tmp->vif == vif) {
1286                                 reset = true;
1287                                 ctx = tmp;
1288                                 break;
1289                         }
1290
1291                         /* check if this busy context is exclusive */
1292                         if (tmp->exclusive_interface_modes &
1293                                                 BIT(tmp->vif->type)) {
1294                                 err = -EINVAL;
1295                                 goto out;
1296                         }
1297                         continue;
1298                 }
1299
1300                 if (!(possible_modes & BIT(viftype)))
1301                         continue;
1302
1303                 /* have maybe usable context w/o interface */
1304                 ctx = tmp;
1305                 break;
1306         }
1307
1308         if (!ctx) {
1309                 err = -EOPNOTSUPP;
1310                 goto out;
1311         }
1312
1313         vif_priv->ctx = ctx;
1314         ctx->vif = vif;
1315
1316         /*
1317          * In SNIFFER device type, the firmware reports the FCS to
1318          * the host, rather than snipping it off. Unfortunately,
1319          * mac80211 doesn't (yet) provide a per-packet flag for
1320          * this, so that we have to set the hardware flag based
1321          * on the interfaces added. As the monitor interface can
1322          * only be present by itself, and will be removed before
1323          * other interfaces are added, this is safe.
1324          */
1325         if (vif->type == NL80211_IFTYPE_MONITOR)
1326                 ieee80211_hw_set(priv->hw, RX_INCLUDES_FCS);
1327         else
1328                 __clear_bit(IEEE80211_HW_RX_INCLUDES_FCS, priv->hw->flags);
1329
1330         err = iwl_setup_interface(priv, ctx);
1331         if (!err || reset)
1332                 goto out;
1333
1334         ctx->vif = NULL;
1335         priv->iw_mode = NL80211_IFTYPE_STATION;
1336  out:
1337         mutex_unlock(&priv->mutex);
1338
1339         IWL_DEBUG_MAC80211(priv, "leave\n");
1340         return err;
1341 }
1342
1343 static void iwl_teardown_interface(struct iwl_priv *priv,
1344                                    struct ieee80211_vif *vif,
1345                                    bool mode_change)
1346 {
1347         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1348
1349         lockdep_assert_held(&priv->mutex);
1350
1351         if (priv->scan_vif == vif) {
1352                 iwl_scan_cancel_timeout(priv, 200);
1353                 iwl_force_scan_end(priv);
1354         }
1355
1356         if (!mode_change) {
1357                 iwl_set_mode(priv, ctx);
1358                 if (!ctx->always_active)
1359                         ctx->is_active = false;
1360         }
1361
1362         /*
1363          * When removing the IBSS interface, overwrite the
1364          * BT traffic load with the stored one from the last
1365          * notification, if any. If this is a device that
1366          * doesn't implement this, this has no effect since
1367          * both values are the same and zero.
1368          */
1369         if (vif->type == NL80211_IFTYPE_ADHOC)
1370                 priv->bt_traffic_load = priv->last_bt_traffic_load;
1371 }
1372
1373 static void iwlagn_mac_remove_interface(struct ieee80211_hw *hw,
1374                               struct ieee80211_vif *vif)
1375 {
1376         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1377         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1378
1379         IWL_DEBUG_MAC80211(priv, "enter\n");
1380
1381         mutex_lock(&priv->mutex);
1382
1383         WARN_ON(ctx->vif != vif);
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 ieee80211_scan_request *hw_req)
1480 {
1481         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1482         struct cfg80211_scan_request *req = &hw_req->req;
1483         int ret;
1484
1485         IWL_DEBUG_MAC80211(priv, "enter\n");
1486
1487         if (req->n_channels == 0)
1488                 return -EINVAL;
1489
1490         mutex_lock(&priv->mutex);
1491
1492         /*
1493          * If an internal scan is in progress, just set
1494          * up the scan_request as per above.
1495          */
1496         if (priv->scan_type != IWL_SCAN_NORMAL) {
1497                 IWL_DEBUG_SCAN(priv,
1498                                "SCAN request during internal scan - defer\n");
1499                 priv->scan_request = req;
1500                 priv->scan_vif = vif;
1501                 ret = 0;
1502         } else {
1503                 priv->scan_request = req;
1504                 priv->scan_vif = vif;
1505                 /*
1506                  * mac80211 will only ask for one band at a time
1507                  * so using channels[0] here is ok
1508                  */
1509                 ret = iwl_scan_initiate(priv, vif, IWL_SCAN_NORMAL,
1510                                         req->channels[0]->band);
1511                 if (ret) {
1512                         priv->scan_request = NULL;
1513                         priv->scan_vif = NULL;
1514                 }
1515         }
1516
1517         IWL_DEBUG_MAC80211(priv, "leave\n");
1518
1519         mutex_unlock(&priv->mutex);
1520
1521         return ret;
1522 }
1523
1524 static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
1525 {
1526         struct iwl_addsta_cmd cmd = {
1527                 .mode = STA_CONTROL_MODIFY_MSK,
1528                 .station_flags_msk = STA_FLG_PWR_SAVE_MSK,
1529                 .sta.sta_id = sta_id,
1530         };
1531
1532         iwl_send_add_sta(priv, &cmd, CMD_ASYNC);
1533 }
1534
1535 static void iwlagn_mac_sta_notify(struct ieee80211_hw *hw,
1536                                   struct ieee80211_vif *vif,
1537                                   enum sta_notify_cmd cmd,
1538                                   struct ieee80211_sta *sta)
1539 {
1540         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1541         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
1542         int sta_id;
1543
1544         IWL_DEBUG_MAC80211(priv, "enter\n");
1545
1546         switch (cmd) {
1547         case STA_NOTIFY_SLEEP:
1548                 WARN_ON(!sta_priv->client);
1549                 sta_priv->asleep = true;
1550                 if (atomic_read(&sta_priv->pending_frames) > 0)
1551                         ieee80211_sta_block_awake(hw, sta, true);
1552                 break;
1553         case STA_NOTIFY_AWAKE:
1554                 WARN_ON(!sta_priv->client);
1555                 if (!sta_priv->asleep)
1556                         break;
1557                 sta_priv->asleep = false;
1558                 sta_id = iwl_sta_id(sta);
1559                 if (sta_id != IWL_INVALID_STATION)
1560                         iwl_sta_modify_ps_wake(priv, sta_id);
1561                 break;
1562         default:
1563                 break;
1564         }
1565         IWL_DEBUG_MAC80211(priv, "leave\n");
1566 }
1567
1568 static void
1569 iwlagn_mac_reconfig_complete(struct ieee80211_hw *hw,
1570                              enum ieee80211_reconfig_type reconfig_type)
1571 {
1572         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1573
1574         if (reconfig_type == IEEE80211_RECONFIG_TYPE_RESTART)
1575                 iwl_trans_finish_sw_reset(priv->trans);
1576 }
1577
1578 const struct ieee80211_ops iwlagn_hw_ops = {
1579         .add_chanctx = ieee80211_emulate_add_chanctx,
1580         .remove_chanctx = ieee80211_emulate_remove_chanctx,
1581         .change_chanctx = ieee80211_emulate_change_chanctx,
1582         .switch_vif_chanctx = ieee80211_emulate_switch_vif_chanctx,
1583         .tx = iwlagn_mac_tx,
1584         .wake_tx_queue = ieee80211_handle_wake_tx_queue,
1585         .start = iwlagn_mac_start,
1586         .stop = iwlagn_mac_stop,
1587 #ifdef CONFIG_PM_SLEEP
1588         .suspend = iwlagn_mac_suspend,
1589         .resume = iwlagn_mac_resume,
1590         .set_wakeup = iwlagn_mac_set_wakeup,
1591 #endif
1592         .add_interface = iwlagn_mac_add_interface,
1593         .remove_interface = iwlagn_mac_remove_interface,
1594         .change_interface = iwlagn_mac_change_interface,
1595         .config = iwlagn_mac_config,
1596         .configure_filter = iwlagn_configure_filter,
1597         .set_key = iwlagn_mac_set_key,
1598         .update_tkip_key = iwlagn_mac_update_tkip_key,
1599         .set_rekey_data = iwlagn_mac_set_rekey_data,
1600         .conf_tx = iwlagn_mac_conf_tx,
1601         .bss_info_changed = iwlagn_bss_info_changed,
1602         .ampdu_action = iwlagn_mac_ampdu_action,
1603         .hw_scan = iwlagn_mac_hw_scan,
1604         .sta_notify = iwlagn_mac_sta_notify,
1605         .sta_state = iwlagn_mac_sta_state,
1606         .channel_switch = iwlagn_mac_channel_switch,
1607         .flush = iwlagn_mac_flush,
1608         .tx_last_beacon = iwlagn_mac_tx_last_beacon,
1609         .event_callback = iwlagn_mac_event_callback,
1610         .set_tim = iwlagn_mac_set_tim,
1611         .reconfig_complete = iwlagn_mac_reconfig_complete,
1612 };
1613
1614 /* This function both allocates and initializes hw and priv. */
1615 struct ieee80211_hw *iwl_alloc_all(void)
1616 {
1617         struct iwl_priv *priv;
1618         struct iwl_op_mode *op_mode;
1619         /* mac80211 allocates memory for this device instance, including
1620          *   space for this driver's private structure */
1621         struct ieee80211_hw *hw;
1622
1623         hw = ieee80211_alloc_hw(sizeof(struct iwl_priv) +
1624                                 sizeof(struct iwl_op_mode), &iwlagn_hw_ops);
1625         if (!hw)
1626                 goto out;
1627
1628         op_mode = hw->priv;
1629         priv = IWL_OP_MODE_GET_DVM(op_mode);
1630         priv->hw = hw;
1631
1632 out:
1633         return hw;
1634 }