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 - 2025 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->info.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->info.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, 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 struct error_table_start { 426 /* cf. struct iwl_error_event_table */ 427 u32 valid; 428 u32 error_id; 429 } err_info; 430 struct iwl_notification_wait status_wait; 431 static const u16 status_cmd[] = { 432 REPLY_WOWLAN_GET_STATUS, 433 }; 434 struct iwlagn_wowlan_status status_data = {}; 435 struct iwl_resume_data resume_data = { 436 .priv = priv, 437 .cmd = &status_data, 438 .valid = false, 439 }; 440 struct cfg80211_wowlan_wakeup wakeup = { 441 .pattern_idx = -1, 442 }; 443 #ifdef CONFIG_IWLWIFI_DEBUGFS 444 const struct fw_img *img; 445 #endif 446 447 IWL_DEBUG_MAC80211(priv, "enter\n"); 448 mutex_lock(&priv->mutex); 449 450 /* we'll clear ctx->vif during iwlagn_prepare_restart() */ 451 vif = ctx->vif; 452 453 ret = iwl_trans_d3_resume(priv->trans, true); 454 if (ret) 455 goto out_unlock; 456 457 /* uCode is no longer operating by itself */ 458 iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_CLR, 459 CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE); 460 461 base = priv->device_pointers.error_event_table; 462 if (!iwlagn_hw_valid_rtc_data_addr(base)) { 463 IWL_WARN(priv, "Invalid error table during resume!\n"); 464 goto out_unlock; 465 } 466 467 iwl_trans_read_mem_bytes(priv->trans, base, 468 &err_info, sizeof(err_info)); 469 470 if (err_info.valid) { 471 IWL_INFO(priv, "error table is valid (%d, 0x%x)\n", 472 err_info.valid, err_info.error_id); 473 if (err_info.error_id == RF_KILL_INDICATOR_FOR_WOWLAN) { 474 wakeup.rfkill_release = true; 475 ieee80211_report_wowlan_wakeup(vif, &wakeup, 476 GFP_KERNEL); 477 } 478 goto out_unlock; 479 } 480 481 #ifdef CONFIG_IWLWIFI_DEBUGFS 482 img = &priv->fw->img[IWL_UCODE_WOWLAN]; 483 if (!priv->wowlan_sram) 484 priv->wowlan_sram = 485 kzalloc(img->sec[IWL_UCODE_SECTION_DATA].len, 486 GFP_KERNEL); 487 488 if (priv->wowlan_sram) 489 iwl_trans_read_mem(priv->trans, 0x800000, 490 priv->wowlan_sram, 491 img->sec[IWL_UCODE_SECTION_DATA].len / 4); 492 #endif 493 494 /* 495 * This is very strange. The GET_STATUS command is sent but the device 496 * doesn't reply properly, it seems it doesn't close the RBD so one is 497 * always left open ... As a result, we need to send another command 498 * and have to reset the driver afterwards. As we need to switch to 499 * runtime firmware again that'll happen. 500 */ 501 502 iwl_init_notification_wait(&priv->notif_wait, &status_wait, status_cmd, 503 ARRAY_SIZE(status_cmd), iwl_resume_status_fn, 504 &resume_data); 505 506 iwl_dvm_send_cmd_pdu(priv, REPLY_WOWLAN_GET_STATUS, CMD_ASYNC, 0, NULL); 507 iwl_dvm_send_cmd_pdu(priv, REPLY_ECHO, CMD_ASYNC, 0, NULL); 508 /* an RBD is left open in the firmware now! */ 509 510 ret = iwl_wait_notification(&priv->notif_wait, &status_wait, HZ/5); 511 if (ret) 512 goto out_unlock; 513 514 if (resume_data.valid && priv->contexts[IWL_RXON_CTX_BSS].vif) { 515 u32 reasons = le32_to_cpu(status_data.wakeup_reason); 516 struct cfg80211_wowlan_wakeup *wakeup_report; 517 518 IWL_INFO(priv, "WoWLAN wakeup reason(s): 0x%.8x\n", reasons); 519 520 if (reasons) { 521 if (reasons & IWLAGN_WOWLAN_WAKEUP_MAGIC_PACKET) 522 wakeup.magic_pkt = true; 523 if (reasons & IWLAGN_WOWLAN_WAKEUP_PATTERN_MATCH) 524 wakeup.pattern_idx = status_data.pattern_number; 525 if (reasons & (IWLAGN_WOWLAN_WAKEUP_BEACON_MISS | 526 IWLAGN_WOWLAN_WAKEUP_LINK_CHANGE)) 527 wakeup.disconnect = true; 528 if (reasons & IWLAGN_WOWLAN_WAKEUP_GTK_REKEY_FAIL) 529 wakeup.gtk_rekey_failure = true; 530 if (reasons & IWLAGN_WOWLAN_WAKEUP_EAP_IDENT_REQ) 531 wakeup.eap_identity_req = true; 532 if (reasons & IWLAGN_WOWLAN_WAKEUP_4WAY_HANDSHAKE) 533 wakeup.four_way_handshake = true; 534 wakeup_report = &wakeup; 535 } else { 536 wakeup_report = NULL; 537 } 538 539 ieee80211_report_wowlan_wakeup(vif, wakeup_report, GFP_KERNEL); 540 } 541 542 priv->wowlan = false; 543 544 iwlagn_prepare_restart(priv); 545 546 memset((void *)(uintptr_t)&ctx->active, 0, sizeof(ctx->active)); 547 iwl_connection_init_rx_config(priv, ctx); 548 iwlagn_set_rxon_chain(priv, ctx); 549 550 out_unlock: 551 mutex_unlock(&priv->mutex); 552 IWL_DEBUG_MAC80211(priv, "leave\n"); 553 554 ieee80211_resume_disconnect(vif); 555 556 return 1; 557 } 558 559 static void iwlagn_mac_set_wakeup(struct ieee80211_hw *hw, bool enabled) 560 { 561 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 562 563 device_set_wakeup_enable(priv->trans->dev, enabled); 564 } 565 #endif 566 567 static void iwlagn_mac_tx(struct ieee80211_hw *hw, 568 struct ieee80211_tx_control *control, 569 struct sk_buff *skb) 570 { 571 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 572 573 if (iwlagn_tx_skb(priv, control->sta, skb)) 574 ieee80211_free_txskb(hw, skb); 575 } 576 577 static void iwlagn_mac_update_tkip_key(struct ieee80211_hw *hw, 578 struct ieee80211_vif *vif, 579 struct ieee80211_key_conf *keyconf, 580 struct ieee80211_sta *sta, 581 u32 iv32, u16 *phase1key) 582 { 583 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 584 585 iwl_update_tkip_key(priv, vif, keyconf, sta, iv32, phase1key); 586 } 587 588 static int iwlagn_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd, 589 struct ieee80211_vif *vif, 590 struct ieee80211_sta *sta, 591 struct ieee80211_key_conf *key) 592 { 593 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 594 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv; 595 struct iwl_rxon_context *ctx = vif_priv->ctx; 596 int ret; 597 bool is_default_wep_key = false; 598 599 IWL_DEBUG_MAC80211(priv, "enter\n"); 600 601 if (iwlwifi_mod_params.swcrypto) { 602 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n"); 603 return -EOPNOTSUPP; 604 } 605 606 switch (key->cipher) { 607 case WLAN_CIPHER_SUITE_TKIP: 608 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC; 609 fallthrough; 610 case WLAN_CIPHER_SUITE_CCMP: 611 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV; 612 break; 613 default: 614 break; 615 } 616 617 /* 618 * We could program these keys into the hardware as well, but we 619 * don't expect much multicast traffic in IBSS and having keys 620 * for more stations is probably more useful. 621 * 622 * Mark key TX-only and return 0. 623 */ 624 if (vif->type == NL80211_IFTYPE_ADHOC && 625 !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) { 626 key->hw_key_idx = WEP_INVALID_OFFSET; 627 return 0; 628 } 629 630 /* If they key was TX-only, accept deletion */ 631 if (cmd == DISABLE_KEY && key->hw_key_idx == WEP_INVALID_OFFSET) 632 return 0; 633 634 mutex_lock(&priv->mutex); 635 iwl_scan_cancel_timeout(priv, 100); 636 637 BUILD_BUG_ON(WEP_INVALID_OFFSET == IWLAGN_HW_KEY_DEFAULT); 638 639 /* 640 * If we are getting WEP group key and we didn't receive any key mapping 641 * so far, we are in legacy wep mode (group key only), otherwise we are 642 * in 1X mode. 643 * In legacy wep mode, we use another host command to the uCode. 644 */ 645 if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 || 646 key->cipher == WLAN_CIPHER_SUITE_WEP104) && !sta) { 647 if (cmd == SET_KEY) 648 is_default_wep_key = !ctx->key_mapping_keys; 649 else 650 is_default_wep_key = 651 key->hw_key_idx == IWLAGN_HW_KEY_DEFAULT; 652 } 653 654 655 switch (cmd) { 656 case SET_KEY: 657 if (is_default_wep_key) { 658 ret = iwl_set_default_wep_key(priv, vif_priv->ctx, key); 659 break; 660 } 661 ret = iwl_set_dynamic_key(priv, vif_priv->ctx, key, sta); 662 if (ret) { 663 /* 664 * can't add key for RX, but we don't need it 665 * in the device for TX so still return 0 666 */ 667 ret = 0; 668 key->hw_key_idx = WEP_INVALID_OFFSET; 669 } 670 671 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n"); 672 break; 673 case DISABLE_KEY: 674 if (is_default_wep_key) 675 ret = iwl_remove_default_wep_key(priv, ctx, key); 676 else 677 ret = iwl_remove_dynamic_key(priv, ctx, key, sta); 678 679 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n"); 680 break; 681 default: 682 ret = -EINVAL; 683 } 684 685 mutex_unlock(&priv->mutex); 686 IWL_DEBUG_MAC80211(priv, "leave\n"); 687 688 return ret; 689 } 690 691 static int iwlagn_mac_ampdu_action(struct ieee80211_hw *hw, 692 struct ieee80211_vif *vif, 693 struct ieee80211_ampdu_params *params) 694 { 695 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 696 int ret = -EINVAL; 697 struct ieee80211_sta *sta = params->sta; 698 enum ieee80211_ampdu_mlme_action action = params->action; 699 u16 tid = params->tid; 700 u16 *ssn = ¶ms->ssn; 701 u8 buf_size = params->buf_size; 702 struct iwl_station_priv *sta_priv = (void *) sta->drv_priv; 703 704 IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n", 705 sta->addr, tid); 706 707 if (!(priv->nvm_data->sku_cap_11n_enable)) 708 return -EACCES; 709 710 IWL_DEBUG_MAC80211(priv, "enter\n"); 711 mutex_lock(&priv->mutex); 712 713 switch (action) { 714 case IEEE80211_AMPDU_RX_START: 715 if (!iwl_enable_rx_ampdu()) 716 break; 717 IWL_DEBUG_HT(priv, "start Rx\n"); 718 ret = iwl_sta_rx_agg_start(priv, sta, tid, *ssn); 719 break; 720 case IEEE80211_AMPDU_RX_STOP: 721 IWL_DEBUG_HT(priv, "stop Rx\n"); 722 ret = iwl_sta_rx_agg_stop(priv, sta, tid); 723 break; 724 case IEEE80211_AMPDU_TX_START: 725 if (!iwl_enable_tx_ampdu()) 726 break; 727 IWL_DEBUG_HT(priv, "start Tx\n"); 728 ret = iwlagn_tx_agg_start(priv, vif, sta, tid, ssn); 729 break; 730 case IEEE80211_AMPDU_TX_STOP_FLUSH: 731 case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT: 732 IWL_DEBUG_HT(priv, "Flush Tx\n"); 733 ret = iwlagn_tx_agg_flush(priv, vif, sta, tid); 734 break; 735 case IEEE80211_AMPDU_TX_STOP_CONT: 736 IWL_DEBUG_HT(priv, "stop Tx\n"); 737 ret = iwlagn_tx_agg_stop(priv, vif, sta, tid); 738 if ((ret == 0) && (priv->agg_tids_count > 0)) { 739 priv->agg_tids_count--; 740 IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n", 741 priv->agg_tids_count); 742 } 743 if (!priv->agg_tids_count && 744 priv->hw_params.use_rts_for_aggregation) { 745 /* 746 * switch off RTS/CTS if it was previously enabled 747 */ 748 sta_priv->lq_sta.lq.general_params.flags &= 749 ~LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK; 750 iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif), 751 &sta_priv->lq_sta.lq, CMD_ASYNC, false); 752 } 753 break; 754 case IEEE80211_AMPDU_TX_OPERATIONAL: 755 ret = iwlagn_tx_agg_oper(priv, vif, sta, tid, buf_size); 756 break; 757 } 758 mutex_unlock(&priv->mutex); 759 IWL_DEBUG_MAC80211(priv, "leave\n"); 760 return ret; 761 } 762 763 static int iwlagn_mac_sta_add(struct ieee80211_hw *hw, 764 struct ieee80211_vif *vif, 765 struct ieee80211_sta *sta) 766 { 767 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 768 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv; 769 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv; 770 bool is_ap = vif->type == NL80211_IFTYPE_STATION; 771 int ret; 772 u8 sta_id; 773 774 IWL_DEBUG_INFO(priv, "proceeding to add station %pM\n", 775 sta->addr); 776 sta_priv->sta_id = IWL_INVALID_STATION; 777 778 atomic_set(&sta_priv->pending_frames, 0); 779 if (vif->type == NL80211_IFTYPE_AP) 780 sta_priv->client = true; 781 782 ret = iwl_add_station_common(priv, vif_priv->ctx, sta->addr, 783 is_ap, sta, &sta_id); 784 if (ret) { 785 IWL_ERR(priv, "Unable to add station %pM (%d)\n", 786 sta->addr, ret); 787 /* Should we return success if return code is EEXIST ? */ 788 return ret; 789 } 790 791 sta_priv->sta_id = sta_id; 792 793 return 0; 794 } 795 796 static int iwlagn_mac_sta_remove(struct ieee80211_hw *hw, 797 struct ieee80211_vif *vif, 798 struct ieee80211_sta *sta) 799 { 800 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 801 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv; 802 int ret; 803 804 IWL_DEBUG_INFO(priv, "proceeding to remove station %pM\n", sta->addr); 805 806 if (vif->type == NL80211_IFTYPE_STATION) { 807 /* 808 * Station will be removed from device when the RXON 809 * is set to unassociated -- just deactivate it here 810 * to avoid re-programming it. 811 */ 812 ret = 0; 813 iwl_deactivate_station(priv, sta_priv->sta_id, sta->addr); 814 } else { 815 ret = iwl_remove_station(priv, sta_priv->sta_id, sta->addr); 816 if (ret) 817 IWL_DEBUG_QUIET_RFKILL(priv, 818 "Error removing station %pM\n", sta->addr); 819 } 820 return ret; 821 } 822 823 static int iwlagn_mac_sta_state(struct ieee80211_hw *hw, 824 struct ieee80211_vif *vif, 825 struct ieee80211_sta *sta, 826 enum ieee80211_sta_state old_state, 827 enum ieee80211_sta_state new_state) 828 { 829 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 830 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv; 831 enum { 832 NONE, ADD, REMOVE, HT_RATE_INIT, ADD_RATE_INIT, 833 } op = NONE; 834 int ret; 835 836 IWL_DEBUG_MAC80211(priv, "station %pM state change %d->%d\n", 837 sta->addr, old_state, new_state); 838 839 mutex_lock(&priv->mutex); 840 if (vif->type == NL80211_IFTYPE_STATION) { 841 if (old_state == IEEE80211_STA_NOTEXIST && 842 new_state == IEEE80211_STA_NONE) 843 op = ADD; 844 else if (old_state == IEEE80211_STA_NONE && 845 new_state == IEEE80211_STA_NOTEXIST) 846 op = REMOVE; 847 else if (old_state == IEEE80211_STA_AUTH && 848 new_state == IEEE80211_STA_ASSOC) 849 op = HT_RATE_INIT; 850 } else { 851 if (old_state == IEEE80211_STA_AUTH && 852 new_state == IEEE80211_STA_ASSOC) 853 op = ADD_RATE_INIT; 854 else if (old_state == IEEE80211_STA_ASSOC && 855 new_state == IEEE80211_STA_AUTH) 856 op = REMOVE; 857 } 858 859 switch (op) { 860 case ADD: 861 ret = iwlagn_mac_sta_add(hw, vif, sta); 862 if (ret) 863 break; 864 /* 865 * Clear the in-progress flag, the AP station entry was added 866 * but we'll initialize LQ only when we've associated (which 867 * would also clear the in-progress flag). This is necessary 868 * in case we never initialize LQ because association fails. 869 */ 870 spin_lock_bh(&priv->sta_lock); 871 priv->stations[iwl_sta_id(sta)].used &= 872 ~IWL_STA_UCODE_INPROGRESS; 873 spin_unlock_bh(&priv->sta_lock); 874 break; 875 case REMOVE: 876 ret = iwlagn_mac_sta_remove(hw, vif, sta); 877 break; 878 case ADD_RATE_INIT: 879 ret = iwlagn_mac_sta_add(hw, vif, sta); 880 if (ret) 881 break; 882 /* Initialize rate scaling */ 883 IWL_DEBUG_INFO(priv, 884 "Initializing rate scaling for station %pM\n", 885 sta->addr); 886 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta)); 887 ret = 0; 888 break; 889 case HT_RATE_INIT: 890 /* Initialize rate scaling */ 891 ret = iwl_sta_update_ht(priv, vif_priv->ctx, sta); 892 if (ret) 893 break; 894 IWL_DEBUG_INFO(priv, 895 "Initializing rate scaling for station %pM\n", 896 sta->addr); 897 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta)); 898 ret = 0; 899 break; 900 default: 901 ret = 0; 902 break; 903 } 904 905 /* 906 * mac80211 might WARN if we fail, but due the way we 907 * (badly) handle hard rfkill, we might fail here 908 */ 909 if (iwl_is_rfkill(priv)) 910 ret = 0; 911 912 mutex_unlock(&priv->mutex); 913 IWL_DEBUG_MAC80211(priv, "leave\n"); 914 915 return ret; 916 } 917 918 static void iwlagn_mac_channel_switch(struct ieee80211_hw *hw, 919 struct ieee80211_vif *vif, 920 struct ieee80211_channel_switch *ch_switch) 921 { 922 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 923 struct ieee80211_conf *conf = &hw->conf; 924 struct ieee80211_channel *channel = ch_switch->chandef.chan; 925 struct iwl_ht_config *ht_conf = &priv->current_ht_config; 926 /* 927 * MULTI-FIXME 928 * When we add support for multiple interfaces, we need to 929 * revisit this. The channel switch command in the device 930 * only affects the BSS context, but what does that really 931 * mean? And what if we get a CSA on the second interface? 932 * This needs a lot of work. 933 */ 934 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS]; 935 u16 ch; 936 937 IWL_DEBUG_MAC80211(priv, "enter\n"); 938 939 mutex_lock(&priv->mutex); 940 941 if (iwl_is_rfkill(priv)) 942 goto out; 943 944 if (test_bit(STATUS_EXIT_PENDING, &priv->status) || 945 test_bit(STATUS_SCANNING, &priv->status) || 946 test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status)) 947 goto out; 948 949 if (!iwl_is_associated_ctx(ctx)) 950 goto out; 951 952 if (!priv->lib->set_channel_switch) 953 goto out; 954 955 ch = channel->hw_value; 956 if (le16_to_cpu(ctx->active.channel) == ch) 957 goto out; 958 959 priv->current_ht_config.smps = conf->smps_mode; 960 961 /* Configure HT40 channels */ 962 switch (cfg80211_get_chandef_type(&ch_switch->chandef)) { 963 case NL80211_CHAN_NO_HT: 964 case NL80211_CHAN_HT20: 965 ctx->ht.is_40mhz = false; 966 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE; 967 break; 968 case NL80211_CHAN_HT40MINUS: 969 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_BELOW; 970 ctx->ht.is_40mhz = true; 971 break; 972 case NL80211_CHAN_HT40PLUS: 973 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_ABOVE; 974 ctx->ht.is_40mhz = true; 975 break; 976 } 977 978 if ((le16_to_cpu(ctx->staging.channel) != ch)) 979 ctx->staging.flags = 0; 980 981 iwl_set_rxon_channel(priv, channel, ctx); 982 iwl_set_rxon_ht(priv, ht_conf); 983 iwl_set_flags_for_band(priv, ctx, channel->band, ctx->vif); 984 985 /* 986 * at this point, staging_rxon has the 987 * configuration for channel switch 988 */ 989 set_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status); 990 priv->switch_channel = cpu_to_le16(ch); 991 if (priv->lib->set_channel_switch(priv, ch_switch)) { 992 clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status); 993 priv->switch_channel = 0; 994 ieee80211_chswitch_done(ctx->vif, false, 0); 995 } 996 997 out: 998 mutex_unlock(&priv->mutex); 999 IWL_DEBUG_MAC80211(priv, "leave\n"); 1000 } 1001 1002 void iwl_chswitch_done(struct iwl_priv *priv, bool is_success) 1003 { 1004 /* 1005 * MULTI-FIXME 1006 * See iwlagn_mac_channel_switch. 1007 */ 1008 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS]; 1009 1010 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) 1011 return; 1012 1013 if (!test_and_clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status)) 1014 return; 1015 1016 if (ctx->vif) 1017 ieee80211_chswitch_done(ctx->vif, is_success, 0); 1018 } 1019 1020 static void iwlagn_configure_filter(struct ieee80211_hw *hw, 1021 unsigned int changed_flags, 1022 unsigned int *total_flags, 1023 u64 multicast) 1024 { 1025 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1026 __le32 filter_or = 0, filter_nand = 0; 1027 struct iwl_rxon_context *ctx; 1028 1029 #define CHK(test, flag) do { \ 1030 if (*total_flags & (test)) \ 1031 filter_or |= (flag); \ 1032 else \ 1033 filter_nand |= (flag); \ 1034 } while (0) 1035 1036 IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n", 1037 changed_flags, *total_flags); 1038 1039 CHK(FIF_OTHER_BSS, RXON_FILTER_PROMISC_MSK); 1040 /* Setting _just_ RXON_FILTER_CTL2HOST_MSK causes FH errors */ 1041 CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_PROMISC_MSK); 1042 CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK); 1043 1044 #undef CHK 1045 1046 mutex_lock(&priv->mutex); 1047 1048 for_each_context(priv, ctx) { 1049 ctx->staging.filter_flags &= ~filter_nand; 1050 ctx->staging.filter_flags |= filter_or; 1051 1052 /* 1053 * Not committing directly because hardware can perform a scan, 1054 * but we'll eventually commit the filter flags change anyway. 1055 */ 1056 } 1057 1058 mutex_unlock(&priv->mutex); 1059 1060 /* 1061 * Receiving all multicast frames is always enabled by the 1062 * default flags setup in iwl_connection_init_rx_config() 1063 * since we currently do not support programming multicast 1064 * filters into the device. 1065 */ 1066 *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | 1067 FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL; 1068 } 1069 1070 static void iwlagn_mac_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 1071 u32 queues, bool drop) 1072 { 1073 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1074 u32 scd_queues; 1075 1076 mutex_lock(&priv->mutex); 1077 IWL_DEBUG_MAC80211(priv, "enter\n"); 1078 1079 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) { 1080 IWL_DEBUG_TX(priv, "Aborting flush due to device shutdown\n"); 1081 goto done; 1082 } 1083 if (iwl_is_rfkill(priv)) { 1084 IWL_DEBUG_TX(priv, "Aborting flush due to RF Kill\n"); 1085 goto done; 1086 } 1087 1088 scd_queues = BIT(priv->trans->mac_cfg->base->num_of_queues) - 1; 1089 scd_queues &= ~(BIT(IWL_IPAN_CMD_QUEUE_NUM) | 1090 BIT(IWL_DEFAULT_CMD_QUEUE_NUM)); 1091 1092 if (drop) { 1093 IWL_DEBUG_TX_QUEUES(priv, "Flushing SCD queues: 0x%x\n", 1094 scd_queues); 1095 if (iwlagn_txfifo_flush(priv, scd_queues)) { 1096 IWL_ERR(priv, "flush request fail\n"); 1097 goto done; 1098 } 1099 } 1100 1101 IWL_DEBUG_TX_QUEUES(priv, "wait transmit/flush all frames\n"); 1102 iwl_trans_wait_tx_queues_empty(priv->trans, scd_queues); 1103 done: 1104 mutex_unlock(&priv->mutex); 1105 IWL_DEBUG_MAC80211(priv, "leave\n"); 1106 } 1107 1108 static void iwlagn_mac_event_callback(struct ieee80211_hw *hw, 1109 struct ieee80211_vif *vif, 1110 const struct ieee80211_event *event) 1111 { 1112 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1113 1114 if (event->type != RSSI_EVENT) 1115 return; 1116 1117 IWL_DEBUG_MAC80211(priv, "enter\n"); 1118 1119 if (priv->lib->bt_params && 1120 priv->lib->bt_params->advanced_bt_coexist) { 1121 if (event->u.rssi.data == RSSI_EVENT_LOW) 1122 priv->bt_enable_pspoll = true; 1123 else if (event->u.rssi.data == RSSI_EVENT_HIGH) 1124 priv->bt_enable_pspoll = false; 1125 1126 queue_work(priv->workqueue, &priv->bt_runtime_config); 1127 } else { 1128 IWL_DEBUG_MAC80211(priv, "Advanced BT coex disabled," 1129 "ignoring RSSI callback\n"); 1130 } 1131 1132 IWL_DEBUG_MAC80211(priv, "leave\n"); 1133 } 1134 1135 static int iwlagn_mac_set_tim(struct ieee80211_hw *hw, 1136 struct ieee80211_sta *sta, bool set) 1137 { 1138 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1139 1140 queue_work(priv->workqueue, &priv->beacon_update); 1141 1142 return 0; 1143 } 1144 1145 static int iwlagn_mac_conf_tx(struct ieee80211_hw *hw, 1146 struct ieee80211_vif *vif, 1147 unsigned int link_id, u16 queue, 1148 const struct ieee80211_tx_queue_params *params) 1149 { 1150 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1151 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv; 1152 struct iwl_rxon_context *ctx = vif_priv->ctx; 1153 int q; 1154 1155 if (WARN_ON(!ctx)) 1156 return -EINVAL; 1157 1158 IWL_DEBUG_MAC80211(priv, "enter\n"); 1159 1160 if (!iwl_is_ready_rf(priv)) { 1161 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n"); 1162 return -EIO; 1163 } 1164 1165 if (queue >= AC_NUM) { 1166 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue); 1167 return 0; 1168 } 1169 1170 q = AC_NUM - 1 - queue; 1171 1172 mutex_lock(&priv->mutex); 1173 1174 ctx->qos_data.def_qos_parm.ac[q].cw_min = 1175 cpu_to_le16(params->cw_min); 1176 ctx->qos_data.def_qos_parm.ac[q].cw_max = 1177 cpu_to_le16(params->cw_max); 1178 ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs; 1179 ctx->qos_data.def_qos_parm.ac[q].edca_txop = 1180 cpu_to_le16((params->txop * 32)); 1181 1182 ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0; 1183 1184 mutex_unlock(&priv->mutex); 1185 1186 IWL_DEBUG_MAC80211(priv, "leave\n"); 1187 return 0; 1188 } 1189 1190 static int iwlagn_mac_tx_last_beacon(struct ieee80211_hw *hw) 1191 { 1192 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1193 1194 return priv->ibss_manager == IWL_IBSS_MANAGER; 1195 } 1196 1197 static int iwl_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx) 1198 { 1199 iwl_connection_init_rx_config(priv, ctx); 1200 1201 iwlagn_set_rxon_chain(priv, ctx); 1202 1203 return iwlagn_commit_rxon(priv, ctx); 1204 } 1205 1206 static int iwl_setup_interface(struct iwl_priv *priv, 1207 struct iwl_rxon_context *ctx) 1208 { 1209 struct ieee80211_vif *vif = ctx->vif; 1210 int err, ac; 1211 1212 lockdep_assert_held(&priv->mutex); 1213 1214 /* 1215 * This variable will be correct only when there's just 1216 * a single context, but all code using it is for hardware 1217 * that supports only one context. 1218 */ 1219 priv->iw_mode = vif->type; 1220 1221 ctx->is_active = true; 1222 1223 err = iwl_set_mode(priv, ctx); 1224 if (err) { 1225 if (!ctx->always_active) 1226 ctx->is_active = false; 1227 return err; 1228 } 1229 1230 if (priv->lib->bt_params && priv->lib->bt_params->advanced_bt_coexist && 1231 vif->type == NL80211_IFTYPE_ADHOC) { 1232 /* 1233 * pretend to have high BT traffic as long as we 1234 * are operating in IBSS mode, as this will cause 1235 * the rate scaling etc. to behave as intended. 1236 */ 1237 priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH; 1238 } 1239 1240 /* set up queue mappings */ 1241 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 1242 vif->hw_queue[ac] = ctx->ac_to_queue[ac]; 1243 1244 if (vif->type == NL80211_IFTYPE_AP) 1245 vif->cab_queue = ctx->mcast_queue; 1246 else 1247 vif->cab_queue = IEEE80211_INVAL_HW_QUEUE; 1248 1249 return 0; 1250 } 1251 1252 static int iwlagn_mac_add_interface(struct ieee80211_hw *hw, 1253 struct ieee80211_vif *vif) 1254 { 1255 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1256 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv; 1257 struct iwl_rxon_context *tmp, *ctx = NULL; 1258 int err; 1259 enum nl80211_iftype viftype = ieee80211_vif_type_p2p(vif); 1260 bool reset = false; 1261 1262 IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n", 1263 viftype, vif->addr); 1264 1265 mutex_lock(&priv->mutex); 1266 1267 if (!iwl_is_ready_rf(priv)) { 1268 IWL_WARN(priv, "Try to add interface when device not ready\n"); 1269 err = -EINVAL; 1270 goto out; 1271 } 1272 1273 for_each_context(priv, tmp) { 1274 u32 possible_modes = 1275 tmp->interface_modes | tmp->exclusive_interface_modes; 1276 1277 if (tmp->vif) { 1278 /* On reset we need to add the same interface again */ 1279 if (tmp->vif == vif) { 1280 reset = true; 1281 ctx = tmp; 1282 break; 1283 } 1284 1285 /* check if this busy context is exclusive */ 1286 if (tmp->exclusive_interface_modes & 1287 BIT(tmp->vif->type)) { 1288 err = -EINVAL; 1289 goto out; 1290 } 1291 continue; 1292 } 1293 1294 if (!(possible_modes & BIT(viftype))) 1295 continue; 1296 1297 /* have maybe usable context w/o interface */ 1298 ctx = tmp; 1299 break; 1300 } 1301 1302 if (!ctx) { 1303 err = -EOPNOTSUPP; 1304 goto out; 1305 } 1306 1307 vif_priv->ctx = ctx; 1308 ctx->vif = vif; 1309 1310 /* 1311 * In SNIFFER device type, the firmware reports the FCS to 1312 * the host, rather than snipping it off. Unfortunately, 1313 * mac80211 doesn't (yet) provide a per-packet flag for 1314 * this, so that we have to set the hardware flag based 1315 * on the interfaces added. As the monitor interface can 1316 * only be present by itself, and will be removed before 1317 * other interfaces are added, this is safe. 1318 */ 1319 if (vif->type == NL80211_IFTYPE_MONITOR) 1320 ieee80211_hw_set(priv->hw, RX_INCLUDES_FCS); 1321 else 1322 __clear_bit(IEEE80211_HW_RX_INCLUDES_FCS, priv->hw->flags); 1323 1324 err = iwl_setup_interface(priv, ctx); 1325 if (!err || reset) 1326 goto out; 1327 1328 ctx->vif = NULL; 1329 priv->iw_mode = NL80211_IFTYPE_STATION; 1330 out: 1331 mutex_unlock(&priv->mutex); 1332 1333 IWL_DEBUG_MAC80211(priv, "leave\n"); 1334 return err; 1335 } 1336 1337 static void iwl_teardown_interface(struct iwl_priv *priv, 1338 struct ieee80211_vif *vif, 1339 bool mode_change) 1340 { 1341 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif); 1342 1343 lockdep_assert_held(&priv->mutex); 1344 1345 if (priv->scan_vif == vif) { 1346 iwl_scan_cancel_timeout(priv, 200); 1347 iwl_force_scan_end(priv); 1348 } 1349 1350 if (!mode_change) { 1351 iwl_set_mode(priv, ctx); 1352 if (!ctx->always_active) 1353 ctx->is_active = false; 1354 } 1355 1356 /* 1357 * When removing the IBSS interface, overwrite the 1358 * BT traffic load with the stored one from the last 1359 * notification, if any. If this is a device that 1360 * doesn't implement this, this has no effect since 1361 * both values are the same and zero. 1362 */ 1363 if (vif->type == NL80211_IFTYPE_ADHOC) 1364 priv->bt_traffic_load = priv->last_bt_traffic_load; 1365 } 1366 1367 static void iwlagn_mac_remove_interface(struct ieee80211_hw *hw, 1368 struct ieee80211_vif *vif) 1369 { 1370 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1371 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif); 1372 1373 IWL_DEBUG_MAC80211(priv, "enter\n"); 1374 1375 mutex_lock(&priv->mutex); 1376 1377 WARN_ON(ctx->vif != vif); 1378 ctx->vif = NULL; 1379 1380 iwl_teardown_interface(priv, vif, false); 1381 1382 mutex_unlock(&priv->mutex); 1383 1384 IWL_DEBUG_MAC80211(priv, "leave\n"); 1385 1386 } 1387 1388 static int iwlagn_mac_change_interface(struct ieee80211_hw *hw, 1389 struct ieee80211_vif *vif, 1390 enum nl80211_iftype newtype, bool newp2p) 1391 { 1392 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1393 struct iwl_rxon_context *ctx, *tmp; 1394 enum nl80211_iftype newviftype = newtype; 1395 u32 interface_modes; 1396 int err; 1397 1398 IWL_DEBUG_MAC80211(priv, "enter\n"); 1399 1400 newtype = ieee80211_iftype_p2p(newtype, newp2p); 1401 1402 mutex_lock(&priv->mutex); 1403 1404 ctx = iwl_rxon_ctx_from_vif(vif); 1405 1406 /* 1407 * To simplify this code, only support changes on the 1408 * BSS context. The PAN context is usually reassigned 1409 * by creating/removing P2P interfaces anyway. 1410 */ 1411 if (ctx->ctxid != IWL_RXON_CTX_BSS) { 1412 err = -EBUSY; 1413 goto out; 1414 } 1415 1416 if (!ctx->vif || !iwl_is_ready_rf(priv)) { 1417 /* 1418 * Huh? But wait ... this can maybe happen when 1419 * we're in the middle of a firmware restart! 1420 */ 1421 err = -EBUSY; 1422 goto out; 1423 } 1424 1425 /* Check if the switch is supported in the same context */ 1426 interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes; 1427 if (!(interface_modes & BIT(newtype))) { 1428 err = -EBUSY; 1429 goto out; 1430 } 1431 1432 if (ctx->exclusive_interface_modes & BIT(newtype)) { 1433 for_each_context(priv, tmp) { 1434 if (ctx == tmp) 1435 continue; 1436 1437 if (!tmp->is_active) 1438 continue; 1439 1440 /* 1441 * The current mode switch would be exclusive, but 1442 * another context is active ... refuse the switch. 1443 */ 1444 err = -EBUSY; 1445 goto out; 1446 } 1447 } 1448 1449 /* success */ 1450 iwl_teardown_interface(priv, vif, true); 1451 vif->type = newviftype; 1452 vif->p2p = newp2p; 1453 err = iwl_setup_interface(priv, ctx); 1454 WARN_ON(err); 1455 /* 1456 * We've switched internally, but submitting to the 1457 * device may have failed for some reason. Mask this 1458 * error, because otherwise mac80211 will not switch 1459 * (and set the interface type back) and we'll be 1460 * out of sync with it. 1461 */ 1462 err = 0; 1463 1464 out: 1465 mutex_unlock(&priv->mutex); 1466 IWL_DEBUG_MAC80211(priv, "leave\n"); 1467 1468 return err; 1469 } 1470 1471 static int iwlagn_mac_hw_scan(struct ieee80211_hw *hw, 1472 struct ieee80211_vif *vif, 1473 struct ieee80211_scan_request *hw_req) 1474 { 1475 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1476 struct cfg80211_scan_request *req = &hw_req->req; 1477 int ret; 1478 1479 IWL_DEBUG_MAC80211(priv, "enter\n"); 1480 1481 if (req->n_channels == 0) 1482 return -EINVAL; 1483 1484 mutex_lock(&priv->mutex); 1485 1486 /* 1487 * If an internal scan is in progress, just set 1488 * up the scan_request as per above. 1489 */ 1490 if (priv->scan_type != IWL_SCAN_NORMAL) { 1491 IWL_DEBUG_SCAN(priv, 1492 "SCAN request during internal scan - defer\n"); 1493 priv->scan_request = req; 1494 priv->scan_vif = vif; 1495 ret = 0; 1496 } else { 1497 priv->scan_request = req; 1498 priv->scan_vif = vif; 1499 /* 1500 * mac80211 will only ask for one band at a time 1501 * so using channels[0] here is ok 1502 */ 1503 ret = iwl_scan_initiate(priv, vif, IWL_SCAN_NORMAL, 1504 req->channels[0]->band); 1505 if (ret) { 1506 priv->scan_request = NULL; 1507 priv->scan_vif = NULL; 1508 } 1509 } 1510 1511 IWL_DEBUG_MAC80211(priv, "leave\n"); 1512 1513 mutex_unlock(&priv->mutex); 1514 1515 return ret; 1516 } 1517 1518 static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id) 1519 { 1520 struct iwl_addsta_cmd cmd = { 1521 .mode = STA_CONTROL_MODIFY_MSK, 1522 .station_flags_msk = STA_FLG_PWR_SAVE_MSK, 1523 .sta.sta_id = sta_id, 1524 }; 1525 1526 iwl_send_add_sta(priv, &cmd, CMD_ASYNC); 1527 } 1528 1529 static void iwlagn_mac_sta_notify(struct ieee80211_hw *hw, 1530 struct ieee80211_vif *vif, 1531 enum sta_notify_cmd cmd, 1532 struct ieee80211_sta *sta) 1533 { 1534 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1535 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv; 1536 int sta_id; 1537 1538 IWL_DEBUG_MAC80211(priv, "enter\n"); 1539 1540 switch (cmd) { 1541 case STA_NOTIFY_SLEEP: 1542 WARN_ON(!sta_priv->client); 1543 sta_priv->asleep = true; 1544 if (atomic_read(&sta_priv->pending_frames) > 0) 1545 ieee80211_sta_block_awake(hw, sta, true); 1546 break; 1547 case STA_NOTIFY_AWAKE: 1548 WARN_ON(!sta_priv->client); 1549 if (!sta_priv->asleep) 1550 break; 1551 sta_priv->asleep = false; 1552 sta_id = iwl_sta_id(sta); 1553 if (sta_id != IWL_INVALID_STATION) 1554 iwl_sta_modify_ps_wake(priv, sta_id); 1555 break; 1556 default: 1557 break; 1558 } 1559 IWL_DEBUG_MAC80211(priv, "leave\n"); 1560 } 1561 1562 static void 1563 iwlagn_mac_reconfig_complete(struct ieee80211_hw *hw, 1564 enum ieee80211_reconfig_type reconfig_type) 1565 { 1566 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1567 1568 if (reconfig_type == IEEE80211_RECONFIG_TYPE_RESTART) 1569 iwl_trans_finish_sw_reset(priv->trans); 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 .reconfig_complete = iwlagn_mac_reconfig_complete, 1606 }; 1607 1608 /* This function both allocates and initializes hw and priv. */ 1609 struct ieee80211_hw *iwl_alloc_all(void) 1610 { 1611 struct iwl_priv *priv; 1612 struct iwl_op_mode *op_mode; 1613 /* mac80211 allocates memory for this device instance, including 1614 * space for this driver's private structure */ 1615 struct ieee80211_hw *hw; 1616 1617 hw = ieee80211_alloc_hw(sizeof(struct iwl_priv) + 1618 sizeof(struct iwl_op_mode), &iwlagn_hw_ops); 1619 if (!hw) 1620 goto out; 1621 1622 op_mode = hw->priv; 1623 priv = IWL_OP_MODE_GET_DVM(op_mode); 1624 priv->hw = hw; 1625 1626 out: 1627 return hw; 1628 } 1629