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 - 2023 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             priv->trans->ops->d3_suspend &&
 149             priv->trans->ops->d3_resume &&
 150             device_can_wakeup(priv->trans->dev)) {
 151                 priv->wowlan_support.flags = WIPHY_WOWLAN_MAGIC_PKT |
 152                                              WIPHY_WOWLAN_DISCONNECT |
 153                                              WIPHY_WOWLAN_EAP_IDENTITY_REQ |
 154                                              WIPHY_WOWLAN_RFKILL_RELEASE;
 155                 if (!iwlwifi_mod_params.swcrypto)
 156                         priv->wowlan_support.flags |=
 157                                 WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
 158                                 WIPHY_WOWLAN_GTK_REKEY_FAILURE;
 159
 160                 priv->wowlan_support.n_patterns = IWLAGN_WOWLAN_MAX_PATTERNS;
 161                 priv->wowlan_support.pattern_min_len =
 162                                         IWLAGN_WOWLAN_MIN_PATTERN_LEN;
 163                 priv->wowlan_support.pattern_max_len =
 164                                         IWLAGN_WOWLAN_MAX_PATTERN_LEN;
 165                 hw->wiphy->wowlan = &priv->wowlan_support;
 166         }
 167 #endif
 168
 169         if (iwlwifi_mod_params.power_save)
 170                 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
 171         else
 172                 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
 173
 174         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
 175         /* we create the 802.11 header and a max-length SSID element */
 176         hw->wiphy->max_scan_ie_len = capa->max_probe_length - 24 - 34;
 177
 178         /*
 179          * We don't use all queues: 4 and 9 are unused and any
 180          * aggregation queue gets mapped down to the AC queue.
 181          */
 182         hw->queues = IWLAGN_FIRST_AMPDU_QUEUE;
 183
 184         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
 185
 186         if (priv->nvm_data->bands[NL80211_BAND_2GHZ].n_channels)
 187                 priv->hw->wiphy->bands[NL80211_BAND_2GHZ] =
 188                         &priv->nvm_data->bands[NL80211_BAND_2GHZ];
 189         if (priv->nvm_data->bands[NL80211_BAND_5GHZ].n_channels)
 190                 priv->hw->wiphy->bands[NL80211_BAND_5GHZ] =
 191                         &priv->nvm_data->bands[NL80211_BAND_5GHZ];
 192
 193         hw->wiphy->hw_version = priv->trans->hw_id;
 194
 195         iwl_leds_init(priv);
 196
 197         wiphy_ext_feature_set(hw->wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST);
 198         wiphy_ext_feature_set(hw->wiphy, NL80211_EXT_FEATURE_EXT_KEY_ID);
 199
 200         ret = ieee80211_register_hw(priv->hw);
 201         if (ret) {
 202                 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);
 203                 iwl_leds_exit(priv);
 204                 return ret;
 205         }
 206         priv->mac80211_registered = 1;
 207
 208         return 0;
 209 }
 210
 211 void iwlagn_mac_unregister(struct iwl_priv *priv)
 212 {
 213         if (!priv->mac80211_registered)
 214                 return;
 215         iwl_leds_exit(priv);
 216         ieee80211_unregister_hw(priv->hw);
 217         priv->mac80211_registered = 0;
 218 }
 219
 220 static int __iwl_up(struct iwl_priv *priv)
 221 {
 222         struct iwl_rxon_context *ctx;
 223         int ret;
 224
 225         lockdep_assert_held(&priv->mutex);
 226
 227         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
 228                 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");
 229                 return -EIO;
 230         }
 231
 232         for_each_context(priv, ctx) {
 233                 ret = iwlagn_alloc_bcast_station(priv, ctx);
 234                 if (ret) {
 235                         iwl_dealloc_bcast_stations(priv);
 236                         return ret;
 237                 }
 238         }
 239
 240         ret = iwl_trans_start_hw(priv->trans);
 241         if (ret) {
 242                 IWL_ERR(priv, "Failed to start HW: %d\n", ret);
 243                 goto error;
 244         }
 245
 246         ret = iwl_run_init_ucode(priv);
 247         if (ret) {
 248                 IWL_ERR(priv, "Failed to run INIT ucode: %d\n", ret);
 249                 goto error;
 250         }
 251
 252         ret = iwl_trans_start_hw(priv->trans);
 253         if (ret) {
 254                 IWL_ERR(priv, "Failed to start HW: %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 ret;
 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.swcrypto)
 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, true);
 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 u16 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, true);
 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.swcrypto) {
 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                 fallthrough;
 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                                    struct ieee80211_ampdu_params *params)
 702 {
 703         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 704         int ret = -EINVAL;
 705         struct ieee80211_sta *sta = params->sta;
 706         enum ieee80211_ampdu_mlme_action action = params->action;
 707         u16 tid = params->tid;
 708         u16 *ssn = &params->ssn;
 709         u8 buf_size = params->buf_size;
 710         struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;
 711
 712         IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n",
 713                      sta->addr, tid);
 714
 715         if (!(priv->nvm_data->sku_cap_11n_enable))
 716                 return -EACCES;
 717
 718         IWL_DEBUG_MAC80211(priv, "enter\n");
 719         mutex_lock(&priv->mutex);
 720
 721         switch (action) {
 722         case IEEE80211_AMPDU_RX_START:
 723                 if (!iwl_enable_rx_ampdu())
 724                         break;
 725                 IWL_DEBUG_HT(priv, "start Rx\n");
 726                 ret = iwl_sta_rx_agg_start(priv, sta, tid, *ssn);
 727                 break;
 728         case IEEE80211_AMPDU_RX_STOP:
 729                 IWL_DEBUG_HT(priv, "stop Rx\n");
 730                 ret = iwl_sta_rx_agg_stop(priv, sta, tid);
 731                 break;
 732         case IEEE80211_AMPDU_TX_START:
 733                 if (!priv->trans->ops->txq_enable)
 734                         break;
 735                 if (!iwl_enable_tx_ampdu())
 736                         break;
 737                 IWL_DEBUG_HT(priv, "start Tx\n");
 738                 ret = iwlagn_tx_agg_start(priv, vif, sta, tid, ssn);
 739                 break;
 740         case IEEE80211_AMPDU_TX_STOP_FLUSH:
 741         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
 742                 IWL_DEBUG_HT(priv, "Flush Tx\n");
 743                 ret = iwlagn_tx_agg_flush(priv, vif, sta, tid);
 744                 break;
 745         case IEEE80211_AMPDU_TX_STOP_CONT:
 746                 IWL_DEBUG_HT(priv, "stop Tx\n");
 747                 ret = iwlagn_tx_agg_stop(priv, vif, sta, tid);
 748                 if ((ret == 0) && (priv->agg_tids_count > 0)) {
 749                         priv->agg_tids_count--;
 750                         IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n",
 751                                      priv->agg_tids_count);
 752                 }
 753                 if (!priv->agg_tids_count &&
 754                     priv->hw_params.use_rts_for_aggregation) {
 755                         /*
 756                          * switch off RTS/CTS if it was previously enabled
 757                          */
 758                         sta_priv->lq_sta.lq.general_params.flags &=
 759                                 ~LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;
 760                         iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif),
 761                                         &sta_priv->lq_sta.lq, CMD_ASYNC, false);
 762                 }
 763                 break;
 764         case IEEE80211_AMPDU_TX_OPERATIONAL:
 765                 ret = iwlagn_tx_agg_oper(priv, vif, sta, tid, buf_size);
 766                 break;
 767         }
 768         mutex_unlock(&priv->mutex);
 769         IWL_DEBUG_MAC80211(priv, "leave\n");
 770         return ret;
 771 }
 772
 773 static int iwlagn_mac_sta_add(struct ieee80211_hw *hw,
 774                               struct ieee80211_vif *vif,
 775                               struct ieee80211_sta *sta)
 776 {
 777         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 778         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
 779         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
 780         bool is_ap = vif->type == NL80211_IFTYPE_STATION;
 781         int ret;
 782         u8 sta_id;
 783
 784         IWL_DEBUG_INFO(priv, "proceeding to add station %pM\n",
 785                         sta->addr);
 786         sta_priv->sta_id = IWL_INVALID_STATION;
 787
 788         atomic_set(&sta_priv->pending_frames, 0);
 789         if (vif->type == NL80211_IFTYPE_AP)
 790                 sta_priv->client = true;
 791
 792         ret = iwl_add_station_common(priv, vif_priv->ctx, sta->addr,
 793                                      is_ap, sta, &sta_id);
 794         if (ret) {
 795                 IWL_ERR(priv, "Unable to add station %pM (%d)\n",
 796                         sta->addr, ret);
 797                 /* Should we return success if return code is EEXIST ? */
 798                 return ret;
 799         }
 800
 801         sta_priv->sta_id = sta_id;
 802
 803         return 0;
 804 }
 805
 806 static int iwlagn_mac_sta_remove(struct ieee80211_hw *hw,
 807                                  struct ieee80211_vif *vif,
 808                                  struct ieee80211_sta *sta)
 809 {
 810         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 811         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
 812         int ret;
 813
 814         IWL_DEBUG_INFO(priv, "proceeding to remove station %pM\n", sta->addr);
 815
 816         if (vif->type == NL80211_IFTYPE_STATION) {
 817                 /*
 818                  * Station will be removed from device when the RXON
 819                  * is set to unassociated -- just deactivate it here
 820                  * to avoid re-programming it.
 821                  */
 822                 ret = 0;
 823                 iwl_deactivate_station(priv, sta_priv->sta_id, sta->addr);
 824         } else {
 825                 ret = iwl_remove_station(priv, sta_priv->sta_id, sta->addr);
 826                 if (ret)
 827                         IWL_DEBUG_QUIET_RFKILL(priv,
 828                                 "Error removing station %pM\n", sta->addr);
 829         }
 830         return ret;
 831 }
 832
 833 static int iwlagn_mac_sta_state(struct ieee80211_hw *hw,
 834                                 struct ieee80211_vif *vif,
 835                                 struct ieee80211_sta *sta,
 836                                 enum ieee80211_sta_state old_state,
 837                                 enum ieee80211_sta_state new_state)
 838 {
 839         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 840         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
 841         enum {
 842                 NONE, ADD, REMOVE, HT_RATE_INIT, ADD_RATE_INIT,
 843         } op = NONE;
 844         int ret;
 845
 846         IWL_DEBUG_MAC80211(priv, "station %pM state change %d->%d\n",
 847                            sta->addr, old_state, new_state);
 848
 849         mutex_lock(&priv->mutex);
 850         if (vif->type == NL80211_IFTYPE_STATION) {
 851                 if (old_state == IEEE80211_STA_NOTEXIST &&
 852                     new_state == IEEE80211_STA_NONE)
 853                         op = ADD;
 854                 else if (old_state == IEEE80211_STA_NONE &&
 855                          new_state == IEEE80211_STA_NOTEXIST)
 856                         op = REMOVE;
 857                 else if (old_state == IEEE80211_STA_AUTH &&
 858                          new_state == IEEE80211_STA_ASSOC)
 859                         op = HT_RATE_INIT;
 860         } else {
 861                 if (old_state == IEEE80211_STA_AUTH &&
 862                     new_state == IEEE80211_STA_ASSOC)
 863                         op = ADD_RATE_INIT;
 864                 else if (old_state == IEEE80211_STA_ASSOC &&
 865                          new_state == IEEE80211_STA_AUTH)
 866                         op = REMOVE;
 867         }
 868
 869         switch (op) {
 870         case ADD:
 871                 ret = iwlagn_mac_sta_add(hw, vif, sta);
 872                 if (ret)
 873                         break;
 874                 /*
 875                  * Clear the in-progress flag, the AP station entry was added
 876                  * but we'll initialize LQ only when we've associated (which
 877                  * would also clear the in-progress flag). This is necessary
 878                  * in case we never initialize LQ because association fails.
 879                  */
 880                 spin_lock_bh(&priv->sta_lock);
 881                 priv->stations[iwl_sta_id(sta)].used &=
 882                         ~IWL_STA_UCODE_INPROGRESS;
 883                 spin_unlock_bh(&priv->sta_lock);
 884                 break;
 885         case REMOVE:
 886                 ret = iwlagn_mac_sta_remove(hw, vif, sta);
 887                 break;
 888         case ADD_RATE_INIT:
 889                 ret = iwlagn_mac_sta_add(hw, vif, sta);
 890                 if (ret)
 891                         break;
 892                 /* Initialize rate scaling */
 893                 IWL_DEBUG_INFO(priv,
 894                                "Initializing rate scaling for station %pM\n",
 895                                sta->addr);
 896                 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta));
 897                 ret = 0;
 898                 break;
 899         case HT_RATE_INIT:
 900                 /* Initialize rate scaling */
 901                 ret = iwl_sta_update_ht(priv, vif_priv->ctx, sta);
 902                 if (ret)
 903                         break;
 904                 IWL_DEBUG_INFO(priv,
 905                                "Initializing rate scaling for station %pM\n",
 906                                sta->addr);
 907                 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta));
 908                 ret = 0;
 909                 break;
 910         default:
 911                 ret = 0;
 912                 break;
 913         }
 914
 915         /*
 916          * mac80211 might WARN if we fail, but due the way we
 917          * (badly) handle hard rfkill, we might fail here
 918          */
 919         if (iwl_is_rfkill(priv))
 920                 ret = 0;
 921
 922         mutex_unlock(&priv->mutex);
 923         IWL_DEBUG_MAC80211(priv, "leave\n");
 924
 925         return ret;
 926 }
 927
 928 static void iwlagn_mac_channel_switch(struct ieee80211_hw *hw,
 929                                       struct ieee80211_vif *vif,
 930                                       struct ieee80211_channel_switch *ch_switch)
 931 {
 932         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
 933         struct ieee80211_conf *conf = &hw->conf;
 934         struct ieee80211_channel *channel = ch_switch->chandef.chan;
 935         struct iwl_ht_config *ht_conf = &priv->current_ht_config;
 936         /*
 937          * MULTI-FIXME
 938          * When we add support for multiple interfaces, we need to
 939          * revisit this. The channel switch command in the device
 940          * only affects the BSS context, but what does that really
 941          * mean? And what if we get a CSA on the second interface?
 942          * This needs a lot of work.
 943          */
 944         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
 945         u16 ch;
 946
 947         IWL_DEBUG_MAC80211(priv, "enter\n");
 948
 949         mutex_lock(&priv->mutex);
 950
 951         if (iwl_is_rfkill(priv))
 952                 goto out;
 953
 954         if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||
 955             test_bit(STATUS_SCANNING, &priv->status) ||
 956             test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
 957                 goto out;
 958
 959         if (!iwl_is_associated_ctx(ctx))
 960                 goto out;
 961
 962         if (!priv->lib->set_channel_switch)
 963                 goto out;
 964
 965         ch = channel->hw_value;
 966         if (le16_to_cpu(ctx->active.channel) == ch)
 967                 goto out;
 968
 969         priv->current_ht_config.smps = conf->smps_mode;
 970
 971         /* Configure HT40 channels */
 972         switch (cfg80211_get_chandef_type(&ch_switch->chandef)) {
 973         case NL80211_CHAN_NO_HT:
 974         case NL80211_CHAN_HT20:
 975                 ctx->ht.is_40mhz = false;
 976                 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE;
 977                 break;
 978         case NL80211_CHAN_HT40MINUS:
 979                 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
 980                 ctx->ht.is_40mhz = true;
 981                 break;
 982         case NL80211_CHAN_HT40PLUS:
 983                 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
 984                 ctx->ht.is_40mhz = true;
 985                 break;
 986         }
 987
 988         if ((le16_to_cpu(ctx->staging.channel) != ch))
 989                 ctx->staging.flags = 0;
 990
 991         iwl_set_rxon_channel(priv, channel, ctx);
 992         iwl_set_rxon_ht(priv, ht_conf);
 993         iwl_set_flags_for_band(priv, ctx, channel->band, ctx->vif);
 994
 995         /*
 996          * at this point, staging_rxon has the
 997          * configuration for channel switch
 998          */
 999         set_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
1000         priv->switch_channel = cpu_to_le16(ch);
1001         if (priv->lib->set_channel_switch(priv, ch_switch)) {
1002                 clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);
1003                 priv->switch_channel = 0;
1004                 ieee80211_chswitch_done(ctx->vif, false, 0);
1005         }
1006
1007 out:
1008         mutex_unlock(&priv->mutex);
1009         IWL_DEBUG_MAC80211(priv, "leave\n");
1010 }
1011
1012 void iwl_chswitch_done(struct iwl_priv *priv, bool is_success)
1013 {
1014         /*
1015          * MULTI-FIXME
1016          * See iwlagn_mac_channel_switch.
1017          */
1018         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1019
1020         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1021                 return;
1022
1023         if (!test_and_clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
1024                 return;
1025
1026         if (ctx->vif)
1027                 ieee80211_chswitch_done(ctx->vif, is_success, 0);
1028 }
1029
1030 static void iwlagn_configure_filter(struct ieee80211_hw *hw,
1031                                     unsigned int changed_flags,
1032                                     unsigned int *total_flags,
1033                                     u64 multicast)
1034 {
1035         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1036         __le32 filter_or = 0, filter_nand = 0;
1037         struct iwl_rxon_context *ctx;
1038
1039 #define CHK(test, flag) do { \
1040         if (*total_flags & (test))              \
1041                 filter_or |= (flag);            \
1042         else                                    \
1043                 filter_nand |= (flag);          \
1044         } while (0)
1045
1046         IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",
1047                         changed_flags, *total_flags);
1048
1049         CHK(FIF_OTHER_BSS, RXON_FILTER_PROMISC_MSK);
1050         /* Setting _just_ RXON_FILTER_CTL2HOST_MSK causes FH errors */
1051         CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_PROMISC_MSK);
1052         CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);
1053
1054 #undef CHK
1055
1056         mutex_lock(&priv->mutex);
1057
1058         for_each_context(priv, ctx) {
1059                 ctx->staging.filter_flags &= ~filter_nand;
1060                 ctx->staging.filter_flags |= filter_or;
1061
1062                 /*
1063                  * Not committing directly because hardware can perform a scan,
1064                  * but we'll eventually commit the filter flags change anyway.
1065                  */
1066         }
1067
1068         mutex_unlock(&priv->mutex);
1069
1070         /*
1071          * Receiving all multicast frames is always enabled by the
1072          * default flags setup in iwl_connection_init_rx_config()
1073          * since we currently do not support programming multicast
1074          * filters into the device.
1075          */
1076         *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI |
1077                         FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;
1078 }
1079
1080 static void iwlagn_mac_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1081                              u32 queues, bool drop)
1082 {
1083         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1084         u32 scd_queues;
1085
1086         mutex_lock(&priv->mutex);
1087         IWL_DEBUG_MAC80211(priv, "enter\n");
1088
1089         if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {
1090                 IWL_DEBUG_TX(priv, "Aborting flush due to device shutdown\n");
1091                 goto done;
1092         }
1093         if (iwl_is_rfkill(priv)) {
1094                 IWL_DEBUG_TX(priv, "Aborting flush due to RF Kill\n");
1095                 goto done;
1096         }
1097
1098         scd_queues = BIT(priv->trans->trans_cfg->base_params->num_of_queues) - 1;
1099         scd_queues &= ~(BIT(IWL_IPAN_CMD_QUEUE_NUM) |
1100                         BIT(IWL_DEFAULT_CMD_QUEUE_NUM));
1101
1102         if (drop) {
1103                 IWL_DEBUG_TX_QUEUES(priv, "Flushing SCD queues: 0x%x\n",
1104                                     scd_queues);
1105                 if (iwlagn_txfifo_flush(priv, scd_queues)) {
1106                         IWL_ERR(priv, "flush request fail\n");
1107                         goto done;
1108                 }
1109         }
1110
1111         IWL_DEBUG_TX_QUEUES(priv, "wait transmit/flush all frames\n");
1112         iwl_trans_wait_tx_queues_empty(priv->trans, scd_queues);
1113 done:
1114         mutex_unlock(&priv->mutex);
1115         IWL_DEBUG_MAC80211(priv, "leave\n");
1116 }
1117
1118 static void iwlagn_mac_event_callback(struct ieee80211_hw *hw,
1119                                       struct ieee80211_vif *vif,
1120                                       const struct ieee80211_event *event)
1121 {
1122         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1123
1124         if (event->type != RSSI_EVENT)
1125                 return;
1126
1127         IWL_DEBUG_MAC80211(priv, "enter\n");
1128
1129         if (priv->lib->bt_params &&
1130             priv->lib->bt_params->advanced_bt_coexist) {
1131                 if (event->u.rssi.data == RSSI_EVENT_LOW)
1132                         priv->bt_enable_pspoll = true;
1133                 else if (event->u.rssi.data == RSSI_EVENT_HIGH)
1134                         priv->bt_enable_pspoll = false;
1135
1136                 queue_work(priv->workqueue, &priv->bt_runtime_config);
1137         } else {
1138                 IWL_DEBUG_MAC80211(priv, "Advanced BT coex disabled,"
1139                                 "ignoring RSSI callback\n");
1140         }
1141
1142         IWL_DEBUG_MAC80211(priv, "leave\n");
1143 }
1144
1145 static int iwlagn_mac_set_tim(struct ieee80211_hw *hw,
1146                               struct ieee80211_sta *sta, bool set)
1147 {
1148         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1149
1150         queue_work(priv->workqueue, &priv->beacon_update);
1151
1152         return 0;
1153 }
1154
1155 static int iwlagn_mac_conf_tx(struct ieee80211_hw *hw,
1156                               struct ieee80211_vif *vif,
1157                               unsigned int link_id, u16 queue,
1158                               const struct ieee80211_tx_queue_params *params)
1159 {
1160         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1161         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1162         struct iwl_rxon_context *ctx = vif_priv->ctx;
1163         int q;
1164
1165         if (WARN_ON(!ctx))
1166                 return -EINVAL;
1167
1168         IWL_DEBUG_MAC80211(priv, "enter\n");
1169
1170         if (!iwl_is_ready_rf(priv)) {
1171                 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");
1172                 return -EIO;
1173         }
1174
1175         if (queue >= AC_NUM) {
1176                 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);
1177                 return 0;
1178         }
1179
1180         q = AC_NUM - 1 - queue;
1181
1182         mutex_lock(&priv->mutex);
1183
1184         ctx->qos_data.def_qos_parm.ac[q].cw_min =
1185                 cpu_to_le16(params->cw_min);
1186         ctx->qos_data.def_qos_parm.ac[q].cw_max =
1187                 cpu_to_le16(params->cw_max);
1188         ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
1189         ctx->qos_data.def_qos_parm.ac[q].edca_txop =
1190                         cpu_to_le16((params->txop * 32));
1191
1192         ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0;
1193
1194         mutex_unlock(&priv->mutex);
1195
1196         IWL_DEBUG_MAC80211(priv, "leave\n");
1197         return 0;
1198 }
1199
1200 static int iwlagn_mac_tx_last_beacon(struct ieee80211_hw *hw)
1201 {
1202         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1203
1204         return priv->ibss_manager == IWL_IBSS_MANAGER;
1205 }
1206
1207 static int iwl_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1208 {
1209         iwl_connection_init_rx_config(priv, ctx);
1210
1211         iwlagn_set_rxon_chain(priv, ctx);
1212
1213         return iwlagn_commit_rxon(priv, ctx);
1214 }
1215
1216 static int iwl_setup_interface(struct iwl_priv *priv,
1217                                struct iwl_rxon_context *ctx)
1218 {
1219         struct ieee80211_vif *vif = ctx->vif;
1220         int err, ac;
1221
1222         lockdep_assert_held(&priv->mutex);
1223
1224         /*
1225          * This variable will be correct only when there's just
1226          * a single context, but all code using it is for hardware
1227          * that supports only one context.
1228          */
1229         priv->iw_mode = vif->type;
1230
1231         ctx->is_active = true;
1232
1233         err = iwl_set_mode(priv, ctx);
1234         if (err) {
1235                 if (!ctx->always_active)
1236                         ctx->is_active = false;
1237                 return err;
1238         }
1239
1240         if (priv->lib->bt_params && priv->lib->bt_params->advanced_bt_coexist &&
1241             vif->type == NL80211_IFTYPE_ADHOC) {
1242                 /*
1243                  * pretend to have high BT traffic as long as we
1244                  * are operating in IBSS mode, as this will cause
1245                  * the rate scaling etc. to behave as intended.
1246                  */
1247                 priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH;
1248         }
1249
1250         /* set up queue mappings */
1251         for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
1252                 vif->hw_queue[ac] = ctx->ac_to_queue[ac];
1253
1254         if (vif->type == NL80211_IFTYPE_AP)
1255                 vif->cab_queue = ctx->mcast_queue;
1256         else
1257                 vif->cab_queue = IEEE80211_INVAL_HW_QUEUE;
1258
1259         return 0;
1260 }
1261
1262 static int iwlagn_mac_add_interface(struct ieee80211_hw *hw,
1263                                     struct ieee80211_vif *vif)
1264 {
1265         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1266         struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
1267         struct iwl_rxon_context *tmp, *ctx = NULL;
1268         int err;
1269         enum nl80211_iftype viftype = ieee80211_vif_type_p2p(vif);
1270         bool reset = false;
1271
1272         IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n",
1273                            viftype, vif->addr);
1274
1275         mutex_lock(&priv->mutex);
1276
1277         if (!iwl_is_ready_rf(priv)) {
1278                 IWL_WARN(priv, "Try to add interface when device not ready\n");
1279                 err = -EINVAL;
1280                 goto out;
1281         }
1282
1283         for_each_context(priv, tmp) {
1284                 u32 possible_modes =
1285                         tmp->interface_modes | tmp->exclusive_interface_modes;
1286
1287                 if (tmp->vif) {
1288                         /* On reset we need to add the same interface again */
1289                         if (tmp->vif == vif) {
1290                                 reset = true;
1291                                 ctx = tmp;
1292                                 break;
1293                         }
1294
1295                         /* check if this busy context is exclusive */
1296                         if (tmp->exclusive_interface_modes &
1297                                                 BIT(tmp->vif->type)) {
1298                                 err = -EINVAL;
1299                                 goto out;
1300                         }
1301                         continue;
1302                 }
1303
1304                 if (!(possible_modes & BIT(viftype)))
1305                         continue;
1306
1307                 /* have maybe usable context w/o interface */
1308                 ctx = tmp;
1309                 break;
1310         }
1311
1312         if (!ctx) {
1313                 err = -EOPNOTSUPP;
1314                 goto out;
1315         }
1316
1317         vif_priv->ctx = ctx;
1318         ctx->vif = vif;
1319
1320         /*
1321          * In SNIFFER device type, the firmware reports the FCS to
1322          * the host, rather than snipping it off. Unfortunately,
1323          * mac80211 doesn't (yet) provide a per-packet flag for
1324          * this, so that we have to set the hardware flag based
1325          * on the interfaces added. As the monitor interface can
1326          * only be present by itself, and will be removed before
1327          * other interfaces are added, this is safe.
1328          */
1329         if (vif->type == NL80211_IFTYPE_MONITOR)
1330                 ieee80211_hw_set(priv->hw, RX_INCLUDES_FCS);
1331         else
1332                 __clear_bit(IEEE80211_HW_RX_INCLUDES_FCS, priv->hw->flags);
1333
1334         err = iwl_setup_interface(priv, ctx);
1335         if (!err || reset)
1336                 goto out;
1337
1338         ctx->vif = NULL;
1339         priv->iw_mode = NL80211_IFTYPE_STATION;
1340  out:
1341         mutex_unlock(&priv->mutex);
1342
1343         IWL_DEBUG_MAC80211(priv, "leave\n");
1344         return err;
1345 }
1346
1347 static void iwl_teardown_interface(struct iwl_priv *priv,
1348                                    struct ieee80211_vif *vif,
1349                                    bool mode_change)
1350 {
1351         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1352
1353         lockdep_assert_held(&priv->mutex);
1354
1355         if (priv->scan_vif == vif) {
1356                 iwl_scan_cancel_timeout(priv, 200);
1357                 iwl_force_scan_end(priv);
1358         }
1359
1360         if (!mode_change) {
1361                 iwl_set_mode(priv, ctx);
1362                 if (!ctx->always_active)
1363                         ctx->is_active = false;
1364         }
1365
1366         /*
1367          * When removing the IBSS interface, overwrite the
1368          * BT traffic load with the stored one from the last
1369          * notification, if any. If this is a device that
1370          * doesn't implement this, this has no effect since
1371          * both values are the same and zero.
1372          */
1373         if (vif->type == NL80211_IFTYPE_ADHOC)
1374                 priv->bt_traffic_load = priv->last_bt_traffic_load;
1375 }
1376
1377 static void iwlagn_mac_remove_interface(struct ieee80211_hw *hw,
1378                               struct ieee80211_vif *vif)
1379 {
1380         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1381         struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);
1382
1383         IWL_DEBUG_MAC80211(priv, "enter\n");
1384
1385         mutex_lock(&priv->mutex);
1386
1387         WARN_ON(ctx->vif != vif);
1388         ctx->vif = NULL;
1389
1390         iwl_teardown_interface(priv, vif, false);
1391
1392         mutex_unlock(&priv->mutex);
1393
1394         IWL_DEBUG_MAC80211(priv, "leave\n");
1395
1396 }
1397
1398 static int iwlagn_mac_change_interface(struct ieee80211_hw *hw,
1399                                        struct ieee80211_vif *vif,
1400                                        enum nl80211_iftype newtype, bool newp2p)
1401 {
1402         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1403         struct iwl_rxon_context *ctx, *tmp;
1404         enum nl80211_iftype newviftype = newtype;
1405         u32 interface_modes;
1406         int err;
1407
1408         IWL_DEBUG_MAC80211(priv, "enter\n");
1409
1410         newtype = ieee80211_iftype_p2p(newtype, newp2p);
1411
1412         mutex_lock(&priv->mutex);
1413
1414         ctx = iwl_rxon_ctx_from_vif(vif);
1415
1416         /*
1417          * To simplify this code, only support changes on the
1418          * BSS context. The PAN context is usually reassigned
1419          * by creating/removing P2P interfaces anyway.
1420          */
1421         if (ctx->ctxid != IWL_RXON_CTX_BSS) {
1422                 err = -EBUSY;
1423                 goto out;
1424         }
1425
1426         if (!ctx->vif || !iwl_is_ready_rf(priv)) {
1427                 /*
1428                  * Huh? But wait ... this can maybe happen when
1429                  * we're in the middle of a firmware restart!
1430                  */
1431                 err = -EBUSY;
1432                 goto out;
1433         }
1434
1435         /* Check if the switch is supported in the same context */
1436         interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes;
1437         if (!(interface_modes & BIT(newtype))) {
1438                 err = -EBUSY;
1439                 goto out;
1440         }
1441
1442         if (ctx->exclusive_interface_modes & BIT(newtype)) {
1443                 for_each_context(priv, tmp) {
1444                         if (ctx == tmp)
1445                                 continue;
1446
1447                         if (!tmp->is_active)
1448                                 continue;
1449
1450                         /*
1451                          * The current mode switch would be exclusive, but
1452                          * another context is active ... refuse the switch.
1453                          */
1454                         err = -EBUSY;
1455                         goto out;
1456                 }
1457         }
1458
1459         /* success */
1460         iwl_teardown_interface(priv, vif, true);
1461         vif->type = newviftype;
1462         vif->p2p = newp2p;
1463         err = iwl_setup_interface(priv, ctx);
1464         WARN_ON(err);
1465         /*
1466          * We've switched internally, but submitting to the
1467          * device may have failed for some reason. Mask this
1468          * error, because otherwise mac80211 will not switch
1469          * (and set the interface type back) and we'll be
1470          * out of sync with it.
1471          */
1472         err = 0;
1473
1474  out:
1475         mutex_unlock(&priv->mutex);
1476         IWL_DEBUG_MAC80211(priv, "leave\n");
1477
1478         return err;
1479 }
1480
1481 static int iwlagn_mac_hw_scan(struct ieee80211_hw *hw,
1482                               struct ieee80211_vif *vif,
1483                               struct ieee80211_scan_request *hw_req)
1484 {
1485         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1486         struct cfg80211_scan_request *req = &hw_req->req;
1487         int ret;
1488
1489         IWL_DEBUG_MAC80211(priv, "enter\n");
1490
1491         if (req->n_channels == 0)
1492                 return -EINVAL;
1493
1494         mutex_lock(&priv->mutex);
1495
1496         /*
1497          * If an internal scan is in progress, just set
1498          * up the scan_request as per above.
1499          */
1500         if (priv->scan_type != IWL_SCAN_NORMAL) {
1501                 IWL_DEBUG_SCAN(priv,
1502                                "SCAN request during internal scan - defer\n");
1503                 priv->scan_request = req;
1504                 priv->scan_vif = vif;
1505                 ret = 0;
1506         } else {
1507                 priv->scan_request = req;
1508                 priv->scan_vif = vif;
1509                 /*
1510                  * mac80211 will only ask for one band at a time
1511                  * so using channels[0] here is ok
1512                  */
1513                 ret = iwl_scan_initiate(priv, vif, IWL_SCAN_NORMAL,
1514                                         req->channels[0]->band);
1515                 if (ret) {
1516                         priv->scan_request = NULL;
1517                         priv->scan_vif = NULL;
1518                 }
1519         }
1520
1521         IWL_DEBUG_MAC80211(priv, "leave\n");
1522
1523         mutex_unlock(&priv->mutex);
1524
1525         return ret;
1526 }
1527
1528 static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
1529 {
1530         struct iwl_addsta_cmd cmd = {
1531                 .mode = STA_CONTROL_MODIFY_MSK,
1532                 .station_flags_msk = STA_FLG_PWR_SAVE_MSK,
1533                 .sta.sta_id = sta_id,
1534         };
1535
1536         iwl_send_add_sta(priv, &cmd, CMD_ASYNC);
1537 }
1538
1539 static void iwlagn_mac_sta_notify(struct ieee80211_hw *hw,
1540                                   struct ieee80211_vif *vif,
1541                                   enum sta_notify_cmd cmd,
1542                                   struct ieee80211_sta *sta)
1543 {
1544         struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);
1545         struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;
1546         int sta_id;
1547
1548         IWL_DEBUG_MAC80211(priv, "enter\n");
1549
1550         switch (cmd) {
1551         case STA_NOTIFY_SLEEP:
1552                 WARN_ON(!sta_priv->client);
1553                 sta_priv->asleep = true;
1554                 if (atomic_read(&sta_priv->pending_frames) > 0)
1555                         ieee80211_sta_block_awake(hw, sta, true);
1556                 break;
1557         case STA_NOTIFY_AWAKE:
1558                 WARN_ON(!sta_priv->client);
1559                 if (!sta_priv->asleep)
1560                         break;
1561                 sta_priv->asleep = false;
1562                 sta_id = iwl_sta_id(sta);
1563                 if (sta_id != IWL_INVALID_STATION)
1564                         iwl_sta_modify_ps_wake(priv, sta_id);
1565                 break;
1566         default:
1567                 break;
1568         }
1569         IWL_DEBUG_MAC80211(priv, "leave\n");
1570 }
1571
1572 const struct ieee80211_ops iwlagn_hw_ops = {
1573         .add_chanctx = ieee80211_emulate_add_chanctx,
1574         .remove_chanctx = ieee80211_emulate_remove_chanctx,
1575         .change_chanctx = ieee80211_emulate_change_chanctx,
1576         .switch_vif_chanctx = ieee80211_emulate_switch_vif_chanctx,
1577         .tx = iwlagn_mac_tx,
1578         .wake_tx_queue = ieee80211_handle_wake_tx_queue,
1579         .start = iwlagn_mac_start,
1580         .stop = iwlagn_mac_stop,
1581 #ifdef CONFIG_PM_SLEEP
1582         .suspend = iwlagn_mac_suspend,
1583         .resume = iwlagn_mac_resume,
1584         .set_wakeup = iwlagn_mac_set_wakeup,
1585 #endif
1586         .add_interface = iwlagn_mac_add_interface,
1587         .remove_interface = iwlagn_mac_remove_interface,
1588         .change_interface = iwlagn_mac_change_interface,
1589         .config = iwlagn_mac_config,
1590         .configure_filter = iwlagn_configure_filter,
1591         .set_key = iwlagn_mac_set_key,
1592         .update_tkip_key = iwlagn_mac_update_tkip_key,
1593         .set_rekey_data = iwlagn_mac_set_rekey_data,
1594         .conf_tx = iwlagn_mac_conf_tx,
1595         .bss_info_changed = iwlagn_bss_info_changed,
1596         .ampdu_action = iwlagn_mac_ampdu_action,
1597         .hw_scan = iwlagn_mac_hw_scan,
1598         .sta_notify = iwlagn_mac_sta_notify,
1599         .sta_state = iwlagn_mac_sta_state,
1600         .channel_switch = iwlagn_mac_channel_switch,
1601         .flush = iwlagn_mac_flush,
1602         .tx_last_beacon = iwlagn_mac_tx_last_beacon,
1603         .event_callback = iwlagn_mac_event_callback,
1604         .set_tim = iwlagn_mac_set_tim,
1605 };
1606
1607 /* This function both allocates and initializes hw and priv. */
1608 struct ieee80211_hw *iwl_alloc_all(void)
1609 {
1610         struct iwl_priv *priv;
1611         struct iwl_op_mode *op_mode;
1612         /* mac80211 allocates memory for this device instance, including
1613          *   space for this driver's private structure */
1614         struct ieee80211_hw *hw;
1615
1616         hw = ieee80211_alloc_hw(sizeof(struct iwl_priv) +
1617                                 sizeof(struct iwl_op_mode), &iwlagn_hw_ops);
1618         if (!hw)
1619                 goto out;
1620
1621         op_mode = hw->priv;
1622         priv = IWL_OP_MODE_GET_DVM(op_mode);
1623         priv->hw = hw;
1624
1625 out:
1626         return hw;
1627 }