1 // SPDX-License-Identifier: GPL-2.0-only 2 /****************************************************************************** 3 * 4 * Copyright(c) 2003 - 2014 Intel Corporation. All rights reserved. 5 * Copyright(C) 2018 - 2019, 2022 - 2024 Intel Corporation 6 * 7 * Portions of this file are derived from the ipw3945 project, as well 8 * as portions of the ieee80211 subsystem header files. 9 *****************************************************************************/ 10 #include <linux/kernel.h> 11 #include <linux/module.h> 12 #include <linux/slab.h> 13 #include <linux/dma-mapping.h> 14 #include <linux/delay.h> 15 #include <linux/sched.h> 16 #include <linux/skbuff.h> 17 #include <linux/netdevice.h> 18 #include <linux/etherdevice.h> 19 #include <linux/if_arp.h> 20 21 #include <net/ieee80211_radiotap.h> 22 #include <net/mac80211.h> 23 24 #include <asm/div64.h> 25 26 #include "iwl-io.h" 27 #include "iwl-trans.h" 28 #include "iwl-op-mode.h" 29 #include "iwl-modparams.h" 30 31 #include "dev.h" 32 #include "calib.h" 33 #include "agn.h" 34 35 /***************************************************************************** 36 * 37 * mac80211 entry point functions 38 * 39 *****************************************************************************/ 40 41 static const struct ieee80211_iface_limit iwlagn_sta_ap_limits[] = { 42 { 43 .max = 1, 44 .types = BIT(NL80211_IFTYPE_STATION), 45 }, 46 { 47 .max = 1, 48 .types = BIT(NL80211_IFTYPE_AP), 49 }, 50 }; 51 52 static const struct ieee80211_iface_limit iwlagn_2sta_limits[] = { 53 { 54 .max = 2, 55 .types = BIT(NL80211_IFTYPE_STATION), 56 }, 57 }; 58 59 static const struct ieee80211_iface_combination 60 iwlagn_iface_combinations_dualmode[] = { 61 { .num_different_channels = 1, 62 .max_interfaces = 2, 63 .beacon_int_infra_match = true, 64 .limits = iwlagn_sta_ap_limits, 65 .n_limits = ARRAY_SIZE(iwlagn_sta_ap_limits), 66 }, 67 { .num_different_channels = 1, 68 .max_interfaces = 2, 69 .limits = iwlagn_2sta_limits, 70 .n_limits = ARRAY_SIZE(iwlagn_2sta_limits), 71 }, 72 }; 73 74 /* 75 * Not a mac80211 entry point function, but it fits in with all the 76 * other mac80211 functions grouped here. 77 */ 78 int iwlagn_mac_setup_register(struct iwl_priv *priv, 79 const struct iwl_ucode_capabilities *capa) 80 { 81 int ret; 82 struct ieee80211_hw *hw = priv->hw; 83 struct iwl_rxon_context *ctx; 84 85 hw->rate_control_algorithm = "iwl-agn-rs"; 86 87 /* Tell mac80211 our characteristics */ 88 ieee80211_hw_set(hw, SIGNAL_DBM); 89 ieee80211_hw_set(hw, AMPDU_AGGREGATION); 90 ieee80211_hw_set(hw, NEED_DTIM_BEFORE_ASSOC); 91 ieee80211_hw_set(hw, SPECTRUM_MGMT); 92 ieee80211_hw_set(hw, REPORTS_TX_ACK_STATUS); 93 ieee80211_hw_set(hw, QUEUE_CONTROL); 94 ieee80211_hw_set(hw, SUPPORTS_PS); 95 ieee80211_hw_set(hw, SUPPORTS_DYNAMIC_PS); 96 ieee80211_hw_set(hw, SUPPORT_FAST_XMIT); 97 ieee80211_hw_set(hw, WANT_MONITOR_VIF); 98 99 if (priv->trans->max_skb_frags) 100 hw->netdev_features = NETIF_F_HIGHDMA | NETIF_F_SG; 101 102 hw->offchannel_tx_hw_queue = IWL_AUX_QUEUE; 103 hw->radiotap_mcs_details |= IEEE80211_RADIOTAP_MCS_HAVE_FMT; 104 105 /* 106 * Including the following line will crash some AP's. This 107 * workaround removes the stimulus which causes the crash until 108 * the AP software can be fixed. 109 hw->max_tx_aggregation_subframes = LINK_QUAL_AGG_FRAME_LIMIT_DEF; 110 */ 111 112 if (priv->nvm_data->sku_cap_11n_enable) 113 hw->wiphy->features |= NL80211_FEATURE_DYNAMIC_SMPS | 114 NL80211_FEATURE_STATIC_SMPS; 115 116 /* 117 * Enable 11w if advertised by firmware and software crypto 118 * is not enabled (as the firmware will interpret some mgmt 119 * packets, so enabling it with software crypto isn't safe) 120 */ 121 if (priv->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_MFP && 122 !iwlwifi_mod_params.swcrypto) 123 ieee80211_hw_set(hw, MFP_CAPABLE); 124 125 hw->sta_data_size = sizeof(struct iwl_station_priv); 126 hw->vif_data_size = sizeof(struct iwl_vif_priv); 127 128 for_each_context(priv, ctx) { 129 hw->wiphy->interface_modes |= ctx->interface_modes; 130 hw->wiphy->interface_modes |= ctx->exclusive_interface_modes; 131 } 132 133 BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2); 134 135 if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) { 136 hw->wiphy->iface_combinations = 137 iwlagn_iface_combinations_dualmode; 138 hw->wiphy->n_iface_combinations = 139 ARRAY_SIZE(iwlagn_iface_combinations_dualmode); 140 } 141 142 hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN; 143 hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG | 144 REGULATORY_DISABLE_BEACON_HINTS; 145 146 #ifdef CONFIG_PM_SLEEP 147 if (priv->fw->img[IWL_UCODE_WOWLAN].num_sec && 148 device_can_wakeup(priv->trans->dev)) { 149 priv->wowlan_support.flags = WIPHY_WOWLAN_MAGIC_PKT | 150 WIPHY_WOWLAN_DISCONNECT | 151 WIPHY_WOWLAN_EAP_IDENTITY_REQ | 152 WIPHY_WOWLAN_RFKILL_RELEASE; 153 if (!iwlwifi_mod_params.swcrypto) 154 priv->wowlan_support.flags |= 155 WIPHY_WOWLAN_SUPPORTS_GTK_REKEY | 156 WIPHY_WOWLAN_GTK_REKEY_FAILURE; 157 158 priv->wowlan_support.n_patterns = IWLAGN_WOWLAN_MAX_PATTERNS; 159 priv->wowlan_support.pattern_min_len = 160 IWLAGN_WOWLAN_MIN_PATTERN_LEN; 161 priv->wowlan_support.pattern_max_len = 162 IWLAGN_WOWLAN_MAX_PATTERN_LEN; 163 hw->wiphy->wowlan = &priv->wowlan_support; 164 } 165 #endif 166 167 if (iwlwifi_mod_params.power_save) 168 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT; 169 else 170 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT; 171 172 hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX; 173 /* we create the 802.11 header and a max-length SSID element */ 174 hw->wiphy->max_scan_ie_len = capa->max_probe_length - 24 - 34; 175 176 /* 177 * We don't use all queues: 4 and 9 are unused and any 178 * aggregation queue gets mapped down to the AC queue. 179 */ 180 hw->queues = IWLAGN_FIRST_AMPDU_QUEUE; 181 182 hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL; 183 184 if (priv->nvm_data->bands[NL80211_BAND_2GHZ].n_channels) 185 priv->hw->wiphy->bands[NL80211_BAND_2GHZ] = 186 &priv->nvm_data->bands[NL80211_BAND_2GHZ]; 187 if (priv->nvm_data->bands[NL80211_BAND_5GHZ].n_channels) 188 priv->hw->wiphy->bands[NL80211_BAND_5GHZ] = 189 &priv->nvm_data->bands[NL80211_BAND_5GHZ]; 190 191 hw->wiphy->hw_version = priv->trans->hw_id; 192 193 iwl_leds_init(priv); 194 195 wiphy_ext_feature_set(hw->wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST); 196 wiphy_ext_feature_set(hw->wiphy, NL80211_EXT_FEATURE_EXT_KEY_ID); 197 198 ret = ieee80211_register_hw(priv->hw); 199 if (ret) { 200 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret); 201 iwl_leds_exit(priv); 202 return ret; 203 } 204 priv->mac80211_registered = 1; 205 206 return 0; 207 } 208 209 void iwlagn_mac_unregister(struct iwl_priv *priv) 210 { 211 if (!priv->mac80211_registered) 212 return; 213 iwl_leds_exit(priv); 214 ieee80211_unregister_hw(priv->hw); 215 priv->mac80211_registered = 0; 216 } 217 218 static int __iwl_up(struct iwl_priv *priv) 219 { 220 struct iwl_rxon_context *ctx; 221 int ret; 222 223 lockdep_assert_held(&priv->mutex); 224 225 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) { 226 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n"); 227 return -EIO; 228 } 229 230 for_each_context(priv, ctx) { 231 ret = iwlagn_alloc_bcast_station(priv, ctx); 232 if (ret) { 233 iwl_dealloc_bcast_stations(priv); 234 return ret; 235 } 236 } 237 238 ret = iwl_trans_start_hw(priv->trans); 239 if (ret) { 240 IWL_ERR(priv, "Failed to start HW: %d\n", ret); 241 goto error; 242 } 243 244 ret = iwl_run_init_ucode(priv); 245 if (ret) { 246 IWL_ERR(priv, "Failed to run INIT ucode: %d\n", ret); 247 goto error; 248 } 249 250 ret = iwl_trans_start_hw(priv->trans); 251 if (ret) { 252 IWL_ERR(priv, "Failed to start HW: %d\n", ret); 253 goto error; 254 } 255 256 ret = iwl_load_ucode_wait_alive(priv, IWL_UCODE_REGULAR); 257 if (ret) { 258 IWL_ERR(priv, "Failed to start RT ucode: %d\n", ret); 259 goto error; 260 } 261 262 ret = iwl_alive_start(priv); 263 if (ret) 264 goto error; 265 return 0; 266 267 error: 268 set_bit(STATUS_EXIT_PENDING, &priv->status); 269 iwl_down(priv); 270 clear_bit(STATUS_EXIT_PENDING, &priv->status); 271 272 IWL_ERR(priv, "Unable to initialize device.\n"); 273 return ret; 274 } 275 276 static int iwlagn_mac_start(struct ieee80211_hw *hw) 277 { 278 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 279 int ret; 280 281 IWL_DEBUG_MAC80211(priv, "enter\n"); 282 283 /* we should be verifying the device is ready to be opened */ 284 mutex_lock(&priv->mutex); 285 ret = __iwl_up(priv); 286 mutex_unlock(&priv->mutex); 287 if (ret) 288 return ret; 289 290 IWL_DEBUG_INFO(priv, "Start UP work done.\n"); 291 292 /* Now we should be done, and the READY bit should be set. */ 293 if (WARN_ON(!test_bit(STATUS_READY, &priv->status))) 294 ret = -EIO; 295 296 iwlagn_led_enable(priv); 297 298 priv->is_open = 1; 299 IWL_DEBUG_MAC80211(priv, "leave\n"); 300 return ret; 301 } 302 303 static void iwlagn_mac_stop(struct ieee80211_hw *hw, bool suspend) 304 { 305 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 306 307 IWL_DEBUG_MAC80211(priv, "enter\n"); 308 309 if (!priv->is_open) 310 return; 311 312 priv->is_open = 0; 313 314 mutex_lock(&priv->mutex); 315 iwl_down(priv); 316 mutex_unlock(&priv->mutex); 317 318 iwl_cancel_deferred_work(priv); 319 320 flush_workqueue(priv->workqueue); 321 322 IWL_DEBUG_MAC80211(priv, "leave\n"); 323 } 324 325 static void iwlagn_mac_set_rekey_data(struct ieee80211_hw *hw, 326 struct ieee80211_vif *vif, 327 struct cfg80211_gtk_rekey_data *data) 328 { 329 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 330 331 if (iwlwifi_mod_params.swcrypto) 332 return; 333 334 IWL_DEBUG_MAC80211(priv, "enter\n"); 335 mutex_lock(&priv->mutex); 336 337 if (priv->contexts[IWL_RXON_CTX_BSS].vif != vif) 338 goto out; 339 340 memcpy(priv->kek, data->kek, NL80211_KEK_LEN); 341 memcpy(priv->kck, data->kck, NL80211_KCK_LEN); 342 priv->replay_ctr = 343 cpu_to_le64(be64_to_cpup((__be64 *)&data->replay_ctr)); 344 priv->have_rekey_data = true; 345 346 out: 347 mutex_unlock(&priv->mutex); 348 IWL_DEBUG_MAC80211(priv, "leave\n"); 349 } 350 351 #ifdef CONFIG_PM_SLEEP 352 353 static int iwlagn_mac_suspend(struct ieee80211_hw *hw, 354 struct cfg80211_wowlan *wowlan) 355 { 356 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 357 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS]; 358 int ret; 359 360 if (WARN_ON(!wowlan)) 361 return -EINVAL; 362 363 IWL_DEBUG_MAC80211(priv, "enter\n"); 364 mutex_lock(&priv->mutex); 365 366 /* Don't attempt WoWLAN when not associated, tear down instead. */ 367 if (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION || 368 !iwl_is_associated_ctx(ctx)) { 369 ret = 1; 370 goto out; 371 } 372 373 ret = iwlagn_suspend(priv, wowlan); 374 if (ret) 375 goto error; 376 377 /* let the ucode operate on its own */ 378 iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_SET, 379 CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE); 380 381 iwl_trans_d3_suspend(priv->trans, false, true); 382 383 goto out; 384 385 error: 386 priv->wowlan = false; 387 iwlagn_prepare_restart(priv); 388 ieee80211_restart_hw(priv->hw); 389 out: 390 mutex_unlock(&priv->mutex); 391 IWL_DEBUG_MAC80211(priv, "leave\n"); 392 393 return ret; 394 } 395 396 struct iwl_resume_data { 397 struct iwl_priv *priv; 398 struct iwlagn_wowlan_status *cmd; 399 bool valid; 400 }; 401 402 static bool iwl_resume_status_fn(struct iwl_notif_wait_data *notif_wait, 403 struct iwl_rx_packet *pkt, void *data) 404 { 405 struct iwl_resume_data *resume_data = data; 406 struct iwl_priv *priv = resume_data->priv; 407 408 if (iwl_rx_packet_payload_len(pkt) != sizeof(*resume_data->cmd)) { 409 IWL_ERR(priv, "rx wrong size data\n"); 410 return true; 411 } 412 memcpy(resume_data->cmd, pkt->data, sizeof(*resume_data->cmd)); 413 resume_data->valid = true; 414 415 return true; 416 } 417 418 static int iwlagn_mac_resume(struct ieee80211_hw *hw) 419 { 420 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 421 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS]; 422 struct ieee80211_vif *vif; 423 u32 base; 424 int ret; 425 enum iwl_d3_status d3_status; 426 struct error_table_start { 427 /* cf. struct iwl_error_event_table */ 428 u32 valid; 429 u32 error_id; 430 } err_info; 431 struct iwl_notification_wait status_wait; 432 static const u16 status_cmd[] = { 433 REPLY_WOWLAN_GET_STATUS, 434 }; 435 struct iwlagn_wowlan_status status_data = {}; 436 struct iwl_resume_data resume_data = { 437 .priv = priv, 438 .cmd = &status_data, 439 .valid = false, 440 }; 441 struct cfg80211_wowlan_wakeup wakeup = { 442 .pattern_idx = -1, 443 }; 444 #ifdef CONFIG_IWLWIFI_DEBUGFS 445 const struct fw_img *img; 446 #endif 447 448 IWL_DEBUG_MAC80211(priv, "enter\n"); 449 mutex_lock(&priv->mutex); 450 451 /* we'll clear ctx->vif during iwlagn_prepare_restart() */ 452 vif = ctx->vif; 453 454 ret = iwl_trans_d3_resume(priv->trans, &d3_status, false, true); 455 if (ret) 456 goto out_unlock; 457 458 if (d3_status != IWL_D3_STATUS_ALIVE) { 459 IWL_INFO(priv, "Device was reset during suspend\n"); 460 goto out_unlock; 461 } 462 463 /* uCode is no longer operating by itself */ 464 iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_CLR, 465 CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE); 466 467 base = priv->device_pointers.error_event_table; 468 if (!iwlagn_hw_valid_rtc_data_addr(base)) { 469 IWL_WARN(priv, "Invalid error table during resume!\n"); 470 goto out_unlock; 471 } 472 473 iwl_trans_read_mem_bytes(priv->trans, base, 474 &err_info, sizeof(err_info)); 475 476 if (err_info.valid) { 477 IWL_INFO(priv, "error table is valid (%d, 0x%x)\n", 478 err_info.valid, err_info.error_id); 479 if (err_info.error_id == RF_KILL_INDICATOR_FOR_WOWLAN) { 480 wakeup.rfkill_release = true; 481 ieee80211_report_wowlan_wakeup(vif, &wakeup, 482 GFP_KERNEL); 483 } 484 goto out_unlock; 485 } 486 487 #ifdef CONFIG_IWLWIFI_DEBUGFS 488 img = &priv->fw->img[IWL_UCODE_WOWLAN]; 489 if (!priv->wowlan_sram) 490 priv->wowlan_sram = 491 kzalloc(img->sec[IWL_UCODE_SECTION_DATA].len, 492 GFP_KERNEL); 493 494 if (priv->wowlan_sram) 495 iwl_trans_read_mem(priv->trans, 0x800000, 496 priv->wowlan_sram, 497 img->sec[IWL_UCODE_SECTION_DATA].len / 4); 498 #endif 499 500 /* 501 * This is very strange. The GET_STATUS command is sent but the device 502 * doesn't reply properly, it seems it doesn't close the RBD so one is 503 * always left open ... As a result, we need to send another command 504 * and have to reset the driver afterwards. As we need to switch to 505 * runtime firmware again that'll happen. 506 */ 507 508 iwl_init_notification_wait(&priv->notif_wait, &status_wait, status_cmd, 509 ARRAY_SIZE(status_cmd), iwl_resume_status_fn, 510 &resume_data); 511 512 iwl_dvm_send_cmd_pdu(priv, REPLY_WOWLAN_GET_STATUS, CMD_ASYNC, 0, NULL); 513 iwl_dvm_send_cmd_pdu(priv, REPLY_ECHO, CMD_ASYNC, 0, NULL); 514 /* an RBD is left open in the firmware now! */ 515 516 ret = iwl_wait_notification(&priv->notif_wait, &status_wait, HZ/5); 517 if (ret) 518 goto out_unlock; 519 520 if (resume_data.valid && priv->contexts[IWL_RXON_CTX_BSS].vif) { 521 u32 reasons = le32_to_cpu(status_data.wakeup_reason); 522 struct cfg80211_wowlan_wakeup *wakeup_report; 523 524 IWL_INFO(priv, "WoWLAN wakeup reason(s): 0x%.8x\n", reasons); 525 526 if (reasons) { 527 if (reasons & IWLAGN_WOWLAN_WAKEUP_MAGIC_PACKET) 528 wakeup.magic_pkt = true; 529 if (reasons & IWLAGN_WOWLAN_WAKEUP_PATTERN_MATCH) 530 wakeup.pattern_idx = status_data.pattern_number; 531 if (reasons & (IWLAGN_WOWLAN_WAKEUP_BEACON_MISS | 532 IWLAGN_WOWLAN_WAKEUP_LINK_CHANGE)) 533 wakeup.disconnect = true; 534 if (reasons & IWLAGN_WOWLAN_WAKEUP_GTK_REKEY_FAIL) 535 wakeup.gtk_rekey_failure = true; 536 if (reasons & IWLAGN_WOWLAN_WAKEUP_EAP_IDENT_REQ) 537 wakeup.eap_identity_req = true; 538 if (reasons & IWLAGN_WOWLAN_WAKEUP_4WAY_HANDSHAKE) 539 wakeup.four_way_handshake = true; 540 wakeup_report = &wakeup; 541 } else { 542 wakeup_report = NULL; 543 } 544 545 ieee80211_report_wowlan_wakeup(vif, wakeup_report, GFP_KERNEL); 546 } 547 548 priv->wowlan = false; 549 550 iwlagn_prepare_restart(priv); 551 552 memset((void *)&ctx->active, 0, sizeof(ctx->active)); 553 iwl_connection_init_rx_config(priv, ctx); 554 iwlagn_set_rxon_chain(priv, ctx); 555 556 out_unlock: 557 mutex_unlock(&priv->mutex); 558 IWL_DEBUG_MAC80211(priv, "leave\n"); 559 560 ieee80211_resume_disconnect(vif); 561 562 return 1; 563 } 564 565 static void iwlagn_mac_set_wakeup(struct ieee80211_hw *hw, bool enabled) 566 { 567 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 568 569 device_set_wakeup_enable(priv->trans->dev, enabled); 570 } 571 #endif 572 573 static void iwlagn_mac_tx(struct ieee80211_hw *hw, 574 struct ieee80211_tx_control *control, 575 struct sk_buff *skb) 576 { 577 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 578 579 if (iwlagn_tx_skb(priv, control->sta, skb)) 580 ieee80211_free_txskb(hw, skb); 581 } 582 583 static void iwlagn_mac_update_tkip_key(struct ieee80211_hw *hw, 584 struct ieee80211_vif *vif, 585 struct ieee80211_key_conf *keyconf, 586 struct ieee80211_sta *sta, 587 u32 iv32, u16 *phase1key) 588 { 589 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 590 591 iwl_update_tkip_key(priv, vif, keyconf, sta, iv32, phase1key); 592 } 593 594 static int iwlagn_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd, 595 struct ieee80211_vif *vif, 596 struct ieee80211_sta *sta, 597 struct ieee80211_key_conf *key) 598 { 599 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 600 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv; 601 struct iwl_rxon_context *ctx = vif_priv->ctx; 602 int ret; 603 bool is_default_wep_key = false; 604 605 IWL_DEBUG_MAC80211(priv, "enter\n"); 606 607 if (iwlwifi_mod_params.swcrypto) { 608 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n"); 609 return -EOPNOTSUPP; 610 } 611 612 switch (key->cipher) { 613 case WLAN_CIPHER_SUITE_TKIP: 614 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC; 615 fallthrough; 616 case WLAN_CIPHER_SUITE_CCMP: 617 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV; 618 break; 619 default: 620 break; 621 } 622 623 /* 624 * We could program these keys into the hardware as well, but we 625 * don't expect much multicast traffic in IBSS and having keys 626 * for more stations is probably more useful. 627 * 628 * Mark key TX-only and return 0. 629 */ 630 if (vif->type == NL80211_IFTYPE_ADHOC && 631 !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) { 632 key->hw_key_idx = WEP_INVALID_OFFSET; 633 return 0; 634 } 635 636 /* If they key was TX-only, accept deletion */ 637 if (cmd == DISABLE_KEY && key->hw_key_idx == WEP_INVALID_OFFSET) 638 return 0; 639 640 mutex_lock(&priv->mutex); 641 iwl_scan_cancel_timeout(priv, 100); 642 643 BUILD_BUG_ON(WEP_INVALID_OFFSET == IWLAGN_HW_KEY_DEFAULT); 644 645 /* 646 * If we are getting WEP group key and we didn't receive any key mapping 647 * so far, we are in legacy wep mode (group key only), otherwise we are 648 * in 1X mode. 649 * In legacy wep mode, we use another host command to the uCode. 650 */ 651 if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 || 652 key->cipher == WLAN_CIPHER_SUITE_WEP104) && !sta) { 653 if (cmd == SET_KEY) 654 is_default_wep_key = !ctx->key_mapping_keys; 655 else 656 is_default_wep_key = 657 key->hw_key_idx == IWLAGN_HW_KEY_DEFAULT; 658 } 659 660 661 switch (cmd) { 662 case SET_KEY: 663 if (is_default_wep_key) { 664 ret = iwl_set_default_wep_key(priv, vif_priv->ctx, key); 665 break; 666 } 667 ret = iwl_set_dynamic_key(priv, vif_priv->ctx, key, sta); 668 if (ret) { 669 /* 670 * can't add key for RX, but we don't need it 671 * in the device for TX so still return 0 672 */ 673 ret = 0; 674 key->hw_key_idx = WEP_INVALID_OFFSET; 675 } 676 677 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n"); 678 break; 679 case DISABLE_KEY: 680 if (is_default_wep_key) 681 ret = iwl_remove_default_wep_key(priv, ctx, key); 682 else 683 ret = iwl_remove_dynamic_key(priv, ctx, key, sta); 684 685 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n"); 686 break; 687 default: 688 ret = -EINVAL; 689 } 690 691 mutex_unlock(&priv->mutex); 692 IWL_DEBUG_MAC80211(priv, "leave\n"); 693 694 return ret; 695 } 696 697 static int iwlagn_mac_ampdu_action(struct ieee80211_hw *hw, 698 struct ieee80211_vif *vif, 699 struct ieee80211_ampdu_params *params) 700 { 701 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 702 int ret = -EINVAL; 703 struct ieee80211_sta *sta = params->sta; 704 enum ieee80211_ampdu_mlme_action action = params->action; 705 u16 tid = params->tid; 706 u16 *ssn = ¶ms->ssn; 707 u8 buf_size = params->buf_size; 708 struct iwl_station_priv *sta_priv = (void *) sta->drv_priv; 709 710 IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n", 711 sta->addr, tid); 712 713 if (!(priv->nvm_data->sku_cap_11n_enable)) 714 return -EACCES; 715 716 IWL_DEBUG_MAC80211(priv, "enter\n"); 717 mutex_lock(&priv->mutex); 718 719 switch (action) { 720 case IEEE80211_AMPDU_RX_START: 721 if (!iwl_enable_rx_ampdu()) 722 break; 723 IWL_DEBUG_HT(priv, "start Rx\n"); 724 ret = iwl_sta_rx_agg_start(priv, sta, tid, *ssn); 725 break; 726 case IEEE80211_AMPDU_RX_STOP: 727 IWL_DEBUG_HT(priv, "stop Rx\n"); 728 ret = iwl_sta_rx_agg_stop(priv, sta, tid); 729 break; 730 case IEEE80211_AMPDU_TX_START: 731 if (!iwl_enable_tx_ampdu()) 732 break; 733 IWL_DEBUG_HT(priv, "start Tx\n"); 734 ret = iwlagn_tx_agg_start(priv, vif, sta, tid, ssn); 735 break; 736 case IEEE80211_AMPDU_TX_STOP_FLUSH: 737 case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT: 738 IWL_DEBUG_HT(priv, "Flush Tx\n"); 739 ret = iwlagn_tx_agg_flush(priv, vif, sta, tid); 740 break; 741 case IEEE80211_AMPDU_TX_STOP_CONT: 742 IWL_DEBUG_HT(priv, "stop Tx\n"); 743 ret = iwlagn_tx_agg_stop(priv, vif, sta, tid); 744 if ((ret == 0) && (priv->agg_tids_count > 0)) { 745 priv->agg_tids_count--; 746 IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n", 747 priv->agg_tids_count); 748 } 749 if (!priv->agg_tids_count && 750 priv->hw_params.use_rts_for_aggregation) { 751 /* 752 * switch off RTS/CTS if it was previously enabled 753 */ 754 sta_priv->lq_sta.lq.general_params.flags &= 755 ~LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK; 756 iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif), 757 &sta_priv->lq_sta.lq, CMD_ASYNC, false); 758 } 759 break; 760 case IEEE80211_AMPDU_TX_OPERATIONAL: 761 ret = iwlagn_tx_agg_oper(priv, vif, sta, tid, buf_size); 762 break; 763 } 764 mutex_unlock(&priv->mutex); 765 IWL_DEBUG_MAC80211(priv, "leave\n"); 766 return ret; 767 } 768 769 static int iwlagn_mac_sta_add(struct ieee80211_hw *hw, 770 struct ieee80211_vif *vif, 771 struct ieee80211_sta *sta) 772 { 773 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 774 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv; 775 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv; 776 bool is_ap = vif->type == NL80211_IFTYPE_STATION; 777 int ret; 778 u8 sta_id; 779 780 IWL_DEBUG_INFO(priv, "proceeding to add station %pM\n", 781 sta->addr); 782 sta_priv->sta_id = IWL_INVALID_STATION; 783 784 atomic_set(&sta_priv->pending_frames, 0); 785 if (vif->type == NL80211_IFTYPE_AP) 786 sta_priv->client = true; 787 788 ret = iwl_add_station_common(priv, vif_priv->ctx, sta->addr, 789 is_ap, sta, &sta_id); 790 if (ret) { 791 IWL_ERR(priv, "Unable to add station %pM (%d)\n", 792 sta->addr, ret); 793 /* Should we return success if return code is EEXIST ? */ 794 return ret; 795 } 796 797 sta_priv->sta_id = sta_id; 798 799 return 0; 800 } 801 802 static int iwlagn_mac_sta_remove(struct ieee80211_hw *hw, 803 struct ieee80211_vif *vif, 804 struct ieee80211_sta *sta) 805 { 806 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 807 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv; 808 int ret; 809 810 IWL_DEBUG_INFO(priv, "proceeding to remove station %pM\n", sta->addr); 811 812 if (vif->type == NL80211_IFTYPE_STATION) { 813 /* 814 * Station will be removed from device when the RXON 815 * is set to unassociated -- just deactivate it here 816 * to avoid re-programming it. 817 */ 818 ret = 0; 819 iwl_deactivate_station(priv, sta_priv->sta_id, sta->addr); 820 } else { 821 ret = iwl_remove_station(priv, sta_priv->sta_id, sta->addr); 822 if (ret) 823 IWL_DEBUG_QUIET_RFKILL(priv, 824 "Error removing station %pM\n", sta->addr); 825 } 826 return ret; 827 } 828 829 static int iwlagn_mac_sta_state(struct ieee80211_hw *hw, 830 struct ieee80211_vif *vif, 831 struct ieee80211_sta *sta, 832 enum ieee80211_sta_state old_state, 833 enum ieee80211_sta_state new_state) 834 { 835 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 836 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv; 837 enum { 838 NONE, ADD, REMOVE, HT_RATE_INIT, ADD_RATE_INIT, 839 } op = NONE; 840 int ret; 841 842 IWL_DEBUG_MAC80211(priv, "station %pM state change %d->%d\n", 843 sta->addr, old_state, new_state); 844 845 mutex_lock(&priv->mutex); 846 if (vif->type == NL80211_IFTYPE_STATION) { 847 if (old_state == IEEE80211_STA_NOTEXIST && 848 new_state == IEEE80211_STA_NONE) 849 op = ADD; 850 else if (old_state == IEEE80211_STA_NONE && 851 new_state == IEEE80211_STA_NOTEXIST) 852 op = REMOVE; 853 else if (old_state == IEEE80211_STA_AUTH && 854 new_state == IEEE80211_STA_ASSOC) 855 op = HT_RATE_INIT; 856 } else { 857 if (old_state == IEEE80211_STA_AUTH && 858 new_state == IEEE80211_STA_ASSOC) 859 op = ADD_RATE_INIT; 860 else if (old_state == IEEE80211_STA_ASSOC && 861 new_state == IEEE80211_STA_AUTH) 862 op = REMOVE; 863 } 864 865 switch (op) { 866 case ADD: 867 ret = iwlagn_mac_sta_add(hw, vif, sta); 868 if (ret) 869 break; 870 /* 871 * Clear the in-progress flag, the AP station entry was added 872 * but we'll initialize LQ only when we've associated (which 873 * would also clear the in-progress flag). This is necessary 874 * in case we never initialize LQ because association fails. 875 */ 876 spin_lock_bh(&priv->sta_lock); 877 priv->stations[iwl_sta_id(sta)].used &= 878 ~IWL_STA_UCODE_INPROGRESS; 879 spin_unlock_bh(&priv->sta_lock); 880 break; 881 case REMOVE: 882 ret = iwlagn_mac_sta_remove(hw, vif, sta); 883 break; 884 case ADD_RATE_INIT: 885 ret = iwlagn_mac_sta_add(hw, vif, sta); 886 if (ret) 887 break; 888 /* Initialize rate scaling */ 889 IWL_DEBUG_INFO(priv, 890 "Initializing rate scaling for station %pM\n", 891 sta->addr); 892 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta)); 893 ret = 0; 894 break; 895 case HT_RATE_INIT: 896 /* Initialize rate scaling */ 897 ret = iwl_sta_update_ht(priv, vif_priv->ctx, sta); 898 if (ret) 899 break; 900 IWL_DEBUG_INFO(priv, 901 "Initializing rate scaling for station %pM\n", 902 sta->addr); 903 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta)); 904 ret = 0; 905 break; 906 default: 907 ret = 0; 908 break; 909 } 910 911 /* 912 * mac80211 might WARN if we fail, but due the way we 913 * (badly) handle hard rfkill, we might fail here 914 */ 915 if (iwl_is_rfkill(priv)) 916 ret = 0; 917 918 mutex_unlock(&priv->mutex); 919 IWL_DEBUG_MAC80211(priv, "leave\n"); 920 921 return ret; 922 } 923 924 static void iwlagn_mac_channel_switch(struct ieee80211_hw *hw, 925 struct ieee80211_vif *vif, 926 struct ieee80211_channel_switch *ch_switch) 927 { 928 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 929 struct ieee80211_conf *conf = &hw->conf; 930 struct ieee80211_channel *channel = ch_switch->chandef.chan; 931 struct iwl_ht_config *ht_conf = &priv->current_ht_config; 932 /* 933 * MULTI-FIXME 934 * When we add support for multiple interfaces, we need to 935 * revisit this. The channel switch command in the device 936 * only affects the BSS context, but what does that really 937 * mean? And what if we get a CSA on the second interface? 938 * This needs a lot of work. 939 */ 940 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS]; 941 u16 ch; 942 943 IWL_DEBUG_MAC80211(priv, "enter\n"); 944 945 mutex_lock(&priv->mutex); 946 947 if (iwl_is_rfkill(priv)) 948 goto out; 949 950 if (test_bit(STATUS_EXIT_PENDING, &priv->status) || 951 test_bit(STATUS_SCANNING, &priv->status) || 952 test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status)) 953 goto out; 954 955 if (!iwl_is_associated_ctx(ctx)) 956 goto out; 957 958 if (!priv->lib->set_channel_switch) 959 goto out; 960 961 ch = channel->hw_value; 962 if (le16_to_cpu(ctx->active.channel) == ch) 963 goto out; 964 965 priv->current_ht_config.smps = conf->smps_mode; 966 967 /* Configure HT40 channels */ 968 switch (cfg80211_get_chandef_type(&ch_switch->chandef)) { 969 case NL80211_CHAN_NO_HT: 970 case NL80211_CHAN_HT20: 971 ctx->ht.is_40mhz = false; 972 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE; 973 break; 974 case NL80211_CHAN_HT40MINUS: 975 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_BELOW; 976 ctx->ht.is_40mhz = true; 977 break; 978 case NL80211_CHAN_HT40PLUS: 979 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_ABOVE; 980 ctx->ht.is_40mhz = true; 981 break; 982 } 983 984 if ((le16_to_cpu(ctx->staging.channel) != ch)) 985 ctx->staging.flags = 0; 986 987 iwl_set_rxon_channel(priv, channel, ctx); 988 iwl_set_rxon_ht(priv, ht_conf); 989 iwl_set_flags_for_band(priv, ctx, channel->band, ctx->vif); 990 991 /* 992 * at this point, staging_rxon has the 993 * configuration for channel switch 994 */ 995 set_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status); 996 priv->switch_channel = cpu_to_le16(ch); 997 if (priv->lib->set_channel_switch(priv, ch_switch)) { 998 clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status); 999 priv->switch_channel = 0; 1000 ieee80211_chswitch_done(ctx->vif, false, 0); 1001 } 1002 1003 out: 1004 mutex_unlock(&priv->mutex); 1005 IWL_DEBUG_MAC80211(priv, "leave\n"); 1006 } 1007 1008 void iwl_chswitch_done(struct iwl_priv *priv, bool is_success) 1009 { 1010 /* 1011 * MULTI-FIXME 1012 * See iwlagn_mac_channel_switch. 1013 */ 1014 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS]; 1015 1016 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) 1017 return; 1018 1019 if (!test_and_clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status)) 1020 return; 1021 1022 if (ctx->vif) 1023 ieee80211_chswitch_done(ctx->vif, is_success, 0); 1024 } 1025 1026 static void iwlagn_configure_filter(struct ieee80211_hw *hw, 1027 unsigned int changed_flags, 1028 unsigned int *total_flags, 1029 u64 multicast) 1030 { 1031 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1032 __le32 filter_or = 0, filter_nand = 0; 1033 struct iwl_rxon_context *ctx; 1034 1035 #define CHK(test, flag) do { \ 1036 if (*total_flags & (test)) \ 1037 filter_or |= (flag); \ 1038 else \ 1039 filter_nand |= (flag); \ 1040 } while (0) 1041 1042 IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n", 1043 changed_flags, *total_flags); 1044 1045 CHK(FIF_OTHER_BSS, RXON_FILTER_PROMISC_MSK); 1046 /* Setting _just_ RXON_FILTER_CTL2HOST_MSK causes FH errors */ 1047 CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_PROMISC_MSK); 1048 CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK); 1049 1050 #undef CHK 1051 1052 mutex_lock(&priv->mutex); 1053 1054 for_each_context(priv, ctx) { 1055 ctx->staging.filter_flags &= ~filter_nand; 1056 ctx->staging.filter_flags |= filter_or; 1057 1058 /* 1059 * Not committing directly because hardware can perform a scan, 1060 * but we'll eventually commit the filter flags change anyway. 1061 */ 1062 } 1063 1064 mutex_unlock(&priv->mutex); 1065 1066 /* 1067 * Receiving all multicast frames is always enabled by the 1068 * default flags setup in iwl_connection_init_rx_config() 1069 * since we currently do not support programming multicast 1070 * filters into the device. 1071 */ 1072 *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | 1073 FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL; 1074 } 1075 1076 static void iwlagn_mac_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 1077 u32 queues, bool drop) 1078 { 1079 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1080 u32 scd_queues; 1081 1082 mutex_lock(&priv->mutex); 1083 IWL_DEBUG_MAC80211(priv, "enter\n"); 1084 1085 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) { 1086 IWL_DEBUG_TX(priv, "Aborting flush due to device shutdown\n"); 1087 goto done; 1088 } 1089 if (iwl_is_rfkill(priv)) { 1090 IWL_DEBUG_TX(priv, "Aborting flush due to RF Kill\n"); 1091 goto done; 1092 } 1093 1094 scd_queues = BIT(priv->trans->trans_cfg->base_params->num_of_queues) - 1; 1095 scd_queues &= ~(BIT(IWL_IPAN_CMD_QUEUE_NUM) | 1096 BIT(IWL_DEFAULT_CMD_QUEUE_NUM)); 1097 1098 if (drop) { 1099 IWL_DEBUG_TX_QUEUES(priv, "Flushing SCD queues: 0x%x\n", 1100 scd_queues); 1101 if (iwlagn_txfifo_flush(priv, scd_queues)) { 1102 IWL_ERR(priv, "flush request fail\n"); 1103 goto done; 1104 } 1105 } 1106 1107 IWL_DEBUG_TX_QUEUES(priv, "wait transmit/flush all frames\n"); 1108 iwl_trans_wait_tx_queues_empty(priv->trans, scd_queues); 1109 done: 1110 mutex_unlock(&priv->mutex); 1111 IWL_DEBUG_MAC80211(priv, "leave\n"); 1112 } 1113 1114 static void iwlagn_mac_event_callback(struct ieee80211_hw *hw, 1115 struct ieee80211_vif *vif, 1116 const struct ieee80211_event *event) 1117 { 1118 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1119 1120 if (event->type != RSSI_EVENT) 1121 return; 1122 1123 IWL_DEBUG_MAC80211(priv, "enter\n"); 1124 1125 if (priv->lib->bt_params && 1126 priv->lib->bt_params->advanced_bt_coexist) { 1127 if (event->u.rssi.data == RSSI_EVENT_LOW) 1128 priv->bt_enable_pspoll = true; 1129 else if (event->u.rssi.data == RSSI_EVENT_HIGH) 1130 priv->bt_enable_pspoll = false; 1131 1132 queue_work(priv->workqueue, &priv->bt_runtime_config); 1133 } else { 1134 IWL_DEBUG_MAC80211(priv, "Advanced BT coex disabled," 1135 "ignoring RSSI callback\n"); 1136 } 1137 1138 IWL_DEBUG_MAC80211(priv, "leave\n"); 1139 } 1140 1141 static int iwlagn_mac_set_tim(struct ieee80211_hw *hw, 1142 struct ieee80211_sta *sta, bool set) 1143 { 1144 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1145 1146 queue_work(priv->workqueue, &priv->beacon_update); 1147 1148 return 0; 1149 } 1150 1151 static int iwlagn_mac_conf_tx(struct ieee80211_hw *hw, 1152 struct ieee80211_vif *vif, 1153 unsigned int link_id, u16 queue, 1154 const struct ieee80211_tx_queue_params *params) 1155 { 1156 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1157 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv; 1158 struct iwl_rxon_context *ctx = vif_priv->ctx; 1159 int q; 1160 1161 if (WARN_ON(!ctx)) 1162 return -EINVAL; 1163 1164 IWL_DEBUG_MAC80211(priv, "enter\n"); 1165 1166 if (!iwl_is_ready_rf(priv)) { 1167 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n"); 1168 return -EIO; 1169 } 1170 1171 if (queue >= AC_NUM) { 1172 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue); 1173 return 0; 1174 } 1175 1176 q = AC_NUM - 1 - queue; 1177 1178 mutex_lock(&priv->mutex); 1179 1180 ctx->qos_data.def_qos_parm.ac[q].cw_min = 1181 cpu_to_le16(params->cw_min); 1182 ctx->qos_data.def_qos_parm.ac[q].cw_max = 1183 cpu_to_le16(params->cw_max); 1184 ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs; 1185 ctx->qos_data.def_qos_parm.ac[q].edca_txop = 1186 cpu_to_le16((params->txop * 32)); 1187 1188 ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0; 1189 1190 mutex_unlock(&priv->mutex); 1191 1192 IWL_DEBUG_MAC80211(priv, "leave\n"); 1193 return 0; 1194 } 1195 1196 static int iwlagn_mac_tx_last_beacon(struct ieee80211_hw *hw) 1197 { 1198 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1199 1200 return priv->ibss_manager == IWL_IBSS_MANAGER; 1201 } 1202 1203 static int iwl_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx) 1204 { 1205 iwl_connection_init_rx_config(priv, ctx); 1206 1207 iwlagn_set_rxon_chain(priv, ctx); 1208 1209 return iwlagn_commit_rxon(priv, ctx); 1210 } 1211 1212 static int iwl_setup_interface(struct iwl_priv *priv, 1213 struct iwl_rxon_context *ctx) 1214 { 1215 struct ieee80211_vif *vif = ctx->vif; 1216 int err, ac; 1217 1218 lockdep_assert_held(&priv->mutex); 1219 1220 /* 1221 * This variable will be correct only when there's just 1222 * a single context, but all code using it is for hardware 1223 * that supports only one context. 1224 */ 1225 priv->iw_mode = vif->type; 1226 1227 ctx->is_active = true; 1228 1229 err = iwl_set_mode(priv, ctx); 1230 if (err) { 1231 if (!ctx->always_active) 1232 ctx->is_active = false; 1233 return err; 1234 } 1235 1236 if (priv->lib->bt_params && priv->lib->bt_params->advanced_bt_coexist && 1237 vif->type == NL80211_IFTYPE_ADHOC) { 1238 /* 1239 * pretend to have high BT traffic as long as we 1240 * are operating in IBSS mode, as this will cause 1241 * the rate scaling etc. to behave as intended. 1242 */ 1243 priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH; 1244 } 1245 1246 /* set up queue mappings */ 1247 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 1248 vif->hw_queue[ac] = ctx->ac_to_queue[ac]; 1249 1250 if (vif->type == NL80211_IFTYPE_AP) 1251 vif->cab_queue = ctx->mcast_queue; 1252 else 1253 vif->cab_queue = IEEE80211_INVAL_HW_QUEUE; 1254 1255 return 0; 1256 } 1257 1258 static int iwlagn_mac_add_interface(struct ieee80211_hw *hw, 1259 struct ieee80211_vif *vif) 1260 { 1261 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1262 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv; 1263 struct iwl_rxon_context *tmp, *ctx = NULL; 1264 int err; 1265 enum nl80211_iftype viftype = ieee80211_vif_type_p2p(vif); 1266 bool reset = false; 1267 1268 IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n", 1269 viftype, vif->addr); 1270 1271 mutex_lock(&priv->mutex); 1272 1273 if (!iwl_is_ready_rf(priv)) { 1274 IWL_WARN(priv, "Try to add interface when device not ready\n"); 1275 err = -EINVAL; 1276 goto out; 1277 } 1278 1279 for_each_context(priv, tmp) { 1280 u32 possible_modes = 1281 tmp->interface_modes | tmp->exclusive_interface_modes; 1282 1283 if (tmp->vif) { 1284 /* On reset we need to add the same interface again */ 1285 if (tmp->vif == vif) { 1286 reset = true; 1287 ctx = tmp; 1288 break; 1289 } 1290 1291 /* check if this busy context is exclusive */ 1292 if (tmp->exclusive_interface_modes & 1293 BIT(tmp->vif->type)) { 1294 err = -EINVAL; 1295 goto out; 1296 } 1297 continue; 1298 } 1299 1300 if (!(possible_modes & BIT(viftype))) 1301 continue; 1302 1303 /* have maybe usable context w/o interface */ 1304 ctx = tmp; 1305 break; 1306 } 1307 1308 if (!ctx) { 1309 err = -EOPNOTSUPP; 1310 goto out; 1311 } 1312 1313 vif_priv->ctx = ctx; 1314 ctx->vif = vif; 1315 1316 /* 1317 * In SNIFFER device type, the firmware reports the FCS to 1318 * the host, rather than snipping it off. Unfortunately, 1319 * mac80211 doesn't (yet) provide a per-packet flag for 1320 * this, so that we have to set the hardware flag based 1321 * on the interfaces added. As the monitor interface can 1322 * only be present by itself, and will be removed before 1323 * other interfaces are added, this is safe. 1324 */ 1325 if (vif->type == NL80211_IFTYPE_MONITOR) 1326 ieee80211_hw_set(priv->hw, RX_INCLUDES_FCS); 1327 else 1328 __clear_bit(IEEE80211_HW_RX_INCLUDES_FCS, priv->hw->flags); 1329 1330 err = iwl_setup_interface(priv, ctx); 1331 if (!err || reset) 1332 goto out; 1333 1334 ctx->vif = NULL; 1335 priv->iw_mode = NL80211_IFTYPE_STATION; 1336 out: 1337 mutex_unlock(&priv->mutex); 1338 1339 IWL_DEBUG_MAC80211(priv, "leave\n"); 1340 return err; 1341 } 1342 1343 static void iwl_teardown_interface(struct iwl_priv *priv, 1344 struct ieee80211_vif *vif, 1345 bool mode_change) 1346 { 1347 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif); 1348 1349 lockdep_assert_held(&priv->mutex); 1350 1351 if (priv->scan_vif == vif) { 1352 iwl_scan_cancel_timeout(priv, 200); 1353 iwl_force_scan_end(priv); 1354 } 1355 1356 if (!mode_change) { 1357 iwl_set_mode(priv, ctx); 1358 if (!ctx->always_active) 1359 ctx->is_active = false; 1360 } 1361 1362 /* 1363 * When removing the IBSS interface, overwrite the 1364 * BT traffic load with the stored one from the last 1365 * notification, if any. If this is a device that 1366 * doesn't implement this, this has no effect since 1367 * both values are the same and zero. 1368 */ 1369 if (vif->type == NL80211_IFTYPE_ADHOC) 1370 priv->bt_traffic_load = priv->last_bt_traffic_load; 1371 } 1372 1373 static void iwlagn_mac_remove_interface(struct ieee80211_hw *hw, 1374 struct ieee80211_vif *vif) 1375 { 1376 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1377 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif); 1378 1379 IWL_DEBUG_MAC80211(priv, "enter\n"); 1380 1381 mutex_lock(&priv->mutex); 1382 1383 WARN_ON(ctx->vif != vif); 1384 ctx->vif = NULL; 1385 1386 iwl_teardown_interface(priv, vif, false); 1387 1388 mutex_unlock(&priv->mutex); 1389 1390 IWL_DEBUG_MAC80211(priv, "leave\n"); 1391 1392 } 1393 1394 static int iwlagn_mac_change_interface(struct ieee80211_hw *hw, 1395 struct ieee80211_vif *vif, 1396 enum nl80211_iftype newtype, bool newp2p) 1397 { 1398 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1399 struct iwl_rxon_context *ctx, *tmp; 1400 enum nl80211_iftype newviftype = newtype; 1401 u32 interface_modes; 1402 int err; 1403 1404 IWL_DEBUG_MAC80211(priv, "enter\n"); 1405 1406 newtype = ieee80211_iftype_p2p(newtype, newp2p); 1407 1408 mutex_lock(&priv->mutex); 1409 1410 ctx = iwl_rxon_ctx_from_vif(vif); 1411 1412 /* 1413 * To simplify this code, only support changes on the 1414 * BSS context. The PAN context is usually reassigned 1415 * by creating/removing P2P interfaces anyway. 1416 */ 1417 if (ctx->ctxid != IWL_RXON_CTX_BSS) { 1418 err = -EBUSY; 1419 goto out; 1420 } 1421 1422 if (!ctx->vif || !iwl_is_ready_rf(priv)) { 1423 /* 1424 * Huh? But wait ... this can maybe happen when 1425 * we're in the middle of a firmware restart! 1426 */ 1427 err = -EBUSY; 1428 goto out; 1429 } 1430 1431 /* Check if the switch is supported in the same context */ 1432 interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes; 1433 if (!(interface_modes & BIT(newtype))) { 1434 err = -EBUSY; 1435 goto out; 1436 } 1437 1438 if (ctx->exclusive_interface_modes & BIT(newtype)) { 1439 for_each_context(priv, tmp) { 1440 if (ctx == tmp) 1441 continue; 1442 1443 if (!tmp->is_active) 1444 continue; 1445 1446 /* 1447 * The current mode switch would be exclusive, but 1448 * another context is active ... refuse the switch. 1449 */ 1450 err = -EBUSY; 1451 goto out; 1452 } 1453 } 1454 1455 /* success */ 1456 iwl_teardown_interface(priv, vif, true); 1457 vif->type = newviftype; 1458 vif->p2p = newp2p; 1459 err = iwl_setup_interface(priv, ctx); 1460 WARN_ON(err); 1461 /* 1462 * We've switched internally, but submitting to the 1463 * device may have failed for some reason. Mask this 1464 * error, because otherwise mac80211 will not switch 1465 * (and set the interface type back) and we'll be 1466 * out of sync with it. 1467 */ 1468 err = 0; 1469 1470 out: 1471 mutex_unlock(&priv->mutex); 1472 IWL_DEBUG_MAC80211(priv, "leave\n"); 1473 1474 return err; 1475 } 1476 1477 static int iwlagn_mac_hw_scan(struct ieee80211_hw *hw, 1478 struct ieee80211_vif *vif, 1479 struct ieee80211_scan_request *hw_req) 1480 { 1481 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1482 struct cfg80211_scan_request *req = &hw_req->req; 1483 int ret; 1484 1485 IWL_DEBUG_MAC80211(priv, "enter\n"); 1486 1487 if (req->n_channels == 0) 1488 return -EINVAL; 1489 1490 mutex_lock(&priv->mutex); 1491 1492 /* 1493 * If an internal scan is in progress, just set 1494 * up the scan_request as per above. 1495 */ 1496 if (priv->scan_type != IWL_SCAN_NORMAL) { 1497 IWL_DEBUG_SCAN(priv, 1498 "SCAN request during internal scan - defer\n"); 1499 priv->scan_request = req; 1500 priv->scan_vif = vif; 1501 ret = 0; 1502 } else { 1503 priv->scan_request = req; 1504 priv->scan_vif = vif; 1505 /* 1506 * mac80211 will only ask for one band at a time 1507 * so using channels[0] here is ok 1508 */ 1509 ret = iwl_scan_initiate(priv, vif, IWL_SCAN_NORMAL, 1510 req->channels[0]->band); 1511 if (ret) { 1512 priv->scan_request = NULL; 1513 priv->scan_vif = NULL; 1514 } 1515 } 1516 1517 IWL_DEBUG_MAC80211(priv, "leave\n"); 1518 1519 mutex_unlock(&priv->mutex); 1520 1521 return ret; 1522 } 1523 1524 static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id) 1525 { 1526 struct iwl_addsta_cmd cmd = { 1527 .mode = STA_CONTROL_MODIFY_MSK, 1528 .station_flags_msk = STA_FLG_PWR_SAVE_MSK, 1529 .sta.sta_id = sta_id, 1530 }; 1531 1532 iwl_send_add_sta(priv, &cmd, CMD_ASYNC); 1533 } 1534 1535 static void iwlagn_mac_sta_notify(struct ieee80211_hw *hw, 1536 struct ieee80211_vif *vif, 1537 enum sta_notify_cmd cmd, 1538 struct ieee80211_sta *sta) 1539 { 1540 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1541 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv; 1542 int sta_id; 1543 1544 IWL_DEBUG_MAC80211(priv, "enter\n"); 1545 1546 switch (cmd) { 1547 case STA_NOTIFY_SLEEP: 1548 WARN_ON(!sta_priv->client); 1549 sta_priv->asleep = true; 1550 if (atomic_read(&sta_priv->pending_frames) > 0) 1551 ieee80211_sta_block_awake(hw, sta, true); 1552 break; 1553 case STA_NOTIFY_AWAKE: 1554 WARN_ON(!sta_priv->client); 1555 if (!sta_priv->asleep) 1556 break; 1557 sta_priv->asleep = false; 1558 sta_id = iwl_sta_id(sta); 1559 if (sta_id != IWL_INVALID_STATION) 1560 iwl_sta_modify_ps_wake(priv, sta_id); 1561 break; 1562 default: 1563 break; 1564 } 1565 IWL_DEBUG_MAC80211(priv, "leave\n"); 1566 } 1567 1568 const struct ieee80211_ops iwlagn_hw_ops = { 1569 .add_chanctx = ieee80211_emulate_add_chanctx, 1570 .remove_chanctx = ieee80211_emulate_remove_chanctx, 1571 .change_chanctx = ieee80211_emulate_change_chanctx, 1572 .switch_vif_chanctx = ieee80211_emulate_switch_vif_chanctx, 1573 .tx = iwlagn_mac_tx, 1574 .wake_tx_queue = ieee80211_handle_wake_tx_queue, 1575 .start = iwlagn_mac_start, 1576 .stop = iwlagn_mac_stop, 1577 #ifdef CONFIG_PM_SLEEP 1578 .suspend = iwlagn_mac_suspend, 1579 .resume = iwlagn_mac_resume, 1580 .set_wakeup = iwlagn_mac_set_wakeup, 1581 #endif 1582 .add_interface = iwlagn_mac_add_interface, 1583 .remove_interface = iwlagn_mac_remove_interface, 1584 .change_interface = iwlagn_mac_change_interface, 1585 .config = iwlagn_mac_config, 1586 .configure_filter = iwlagn_configure_filter, 1587 .set_key = iwlagn_mac_set_key, 1588 .update_tkip_key = iwlagn_mac_update_tkip_key, 1589 .set_rekey_data = iwlagn_mac_set_rekey_data, 1590 .conf_tx = iwlagn_mac_conf_tx, 1591 .bss_info_changed = iwlagn_bss_info_changed, 1592 .ampdu_action = iwlagn_mac_ampdu_action, 1593 .hw_scan = iwlagn_mac_hw_scan, 1594 .sta_notify = iwlagn_mac_sta_notify, 1595 .sta_state = iwlagn_mac_sta_state, 1596 .channel_switch = iwlagn_mac_channel_switch, 1597 .flush = iwlagn_mac_flush, 1598 .tx_last_beacon = iwlagn_mac_tx_last_beacon, 1599 .event_callback = iwlagn_mac_event_callback, 1600 .set_tim = iwlagn_mac_set_tim, 1601 }; 1602 1603 /* This function both allocates and initializes hw and priv. */ 1604 struct ieee80211_hw *iwl_alloc_all(void) 1605 { 1606 struct iwl_priv *priv; 1607 struct iwl_op_mode *op_mode; 1608 /* mac80211 allocates memory for this device instance, including 1609 * space for this driver's private structure */ 1610 struct ieee80211_hw *hw; 1611 1612 hw = ieee80211_alloc_hw(sizeof(struct iwl_priv) + 1613 sizeof(struct iwl_op_mode), &iwlagn_hw_ops); 1614 if (!hw) 1615 goto out; 1616 1617 op_mode = hw->priv; 1618 priv = IWL_OP_MODE_GET_DVM(op_mode); 1619 priv->hw = hw; 1620 1621 out: 1622 return hw; 1623 } 1624