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 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 * Contact Information: 11 * Intel Linux Wireless <linuxwifi@intel.com> 12 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 13 * 14 *****************************************************************************/ 15 #include <linux/kernel.h> 16 #include <linux/module.h> 17 #include <linux/slab.h> 18 #include <linux/dma-mapping.h> 19 #include <linux/delay.h> 20 #include <linux/sched.h> 21 #include <linux/skbuff.h> 22 #include <linux/netdevice.h> 23 #include <linux/etherdevice.h> 24 #include <linux/if_arp.h> 25 26 #include <net/ieee80211_radiotap.h> 27 #include <net/mac80211.h> 28 29 #include <asm/div64.h> 30 31 #include "iwl-io.h" 32 #include "iwl-trans.h" 33 #include "iwl-op-mode.h" 34 #include "iwl-modparams.h" 35 36 #include "dev.h" 37 #include "calib.h" 38 #include "agn.h" 39 40 /***************************************************************************** 41 * 42 * mac80211 entry point functions 43 * 44 *****************************************************************************/ 45 46 static const struct ieee80211_iface_limit iwlagn_sta_ap_limits[] = { 47 { 48 .max = 1, 49 .types = BIT(NL80211_IFTYPE_STATION), 50 }, 51 { 52 .max = 1, 53 .types = BIT(NL80211_IFTYPE_AP), 54 }, 55 }; 56 57 static const struct ieee80211_iface_limit iwlagn_2sta_limits[] = { 58 { 59 .max = 2, 60 .types = BIT(NL80211_IFTYPE_STATION), 61 }, 62 }; 63 64 static const struct ieee80211_iface_combination 65 iwlagn_iface_combinations_dualmode[] = { 66 { .num_different_channels = 1, 67 .max_interfaces = 2, 68 .beacon_int_infra_match = true, 69 .limits = iwlagn_sta_ap_limits, 70 .n_limits = ARRAY_SIZE(iwlagn_sta_ap_limits), 71 }, 72 { .num_different_channels = 1, 73 .max_interfaces = 2, 74 .limits = iwlagn_2sta_limits, 75 .n_limits = ARRAY_SIZE(iwlagn_2sta_limits), 76 }, 77 }; 78 79 /* 80 * Not a mac80211 entry point function, but it fits in with all the 81 * other mac80211 functions grouped here. 82 */ 83 int iwlagn_mac_setup_register(struct iwl_priv *priv, 84 const struct iwl_ucode_capabilities *capa) 85 { 86 int ret; 87 struct ieee80211_hw *hw = priv->hw; 88 struct iwl_rxon_context *ctx; 89 90 hw->rate_control_algorithm = "iwl-agn-rs"; 91 92 /* Tell mac80211 our characteristics */ 93 ieee80211_hw_set(hw, SIGNAL_DBM); 94 ieee80211_hw_set(hw, AMPDU_AGGREGATION); 95 ieee80211_hw_set(hw, NEED_DTIM_BEFORE_ASSOC); 96 ieee80211_hw_set(hw, SPECTRUM_MGMT); 97 ieee80211_hw_set(hw, REPORTS_TX_ACK_STATUS); 98 ieee80211_hw_set(hw, QUEUE_CONTROL); 99 ieee80211_hw_set(hw, SUPPORTS_PS); 100 ieee80211_hw_set(hw, SUPPORTS_DYNAMIC_PS); 101 ieee80211_hw_set(hw, SUPPORT_FAST_XMIT); 102 ieee80211_hw_set(hw, WANT_MONITOR_VIF); 103 104 if (priv->trans->max_skb_frags) 105 hw->netdev_features = NETIF_F_HIGHDMA | NETIF_F_SG; 106 107 hw->offchannel_tx_hw_queue = IWL_AUX_QUEUE; 108 hw->radiotap_mcs_details |= IEEE80211_RADIOTAP_MCS_HAVE_FMT; 109 110 /* 111 * Including the following line will crash some AP's. This 112 * workaround removes the stimulus which causes the crash until 113 * the AP software can be fixed. 114 hw->max_tx_aggregation_subframes = LINK_QUAL_AGG_FRAME_LIMIT_DEF; 115 */ 116 117 if (priv->nvm_data->sku_cap_11n_enable) 118 hw->wiphy->features |= NL80211_FEATURE_DYNAMIC_SMPS | 119 NL80211_FEATURE_STATIC_SMPS; 120 121 /* 122 * Enable 11w if advertised by firmware and software crypto 123 * is not enabled (as the firmware will interpret some mgmt 124 * packets, so enabling it with software crypto isn't safe) 125 */ 126 if (priv->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_MFP && 127 !iwlwifi_mod_params.swcrypto) 128 ieee80211_hw_set(hw, MFP_CAPABLE); 129 130 hw->sta_data_size = sizeof(struct iwl_station_priv); 131 hw->vif_data_size = sizeof(struct iwl_vif_priv); 132 133 for_each_context(priv, ctx) { 134 hw->wiphy->interface_modes |= ctx->interface_modes; 135 hw->wiphy->interface_modes |= ctx->exclusive_interface_modes; 136 } 137 138 BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2); 139 140 if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) { 141 hw->wiphy->iface_combinations = 142 iwlagn_iface_combinations_dualmode; 143 hw->wiphy->n_iface_combinations = 144 ARRAY_SIZE(iwlagn_iface_combinations_dualmode); 145 } 146 147 hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN; 148 hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG | 149 REGULATORY_DISABLE_BEACON_HINTS; 150 151 #ifdef CONFIG_PM_SLEEP 152 if (priv->fw->img[IWL_UCODE_WOWLAN].num_sec && 153 priv->trans->ops->d3_suspend && 154 priv->trans->ops->d3_resume && 155 device_can_wakeup(priv->trans->dev)) { 156 priv->wowlan_support.flags = WIPHY_WOWLAN_MAGIC_PKT | 157 WIPHY_WOWLAN_DISCONNECT | 158 WIPHY_WOWLAN_EAP_IDENTITY_REQ | 159 WIPHY_WOWLAN_RFKILL_RELEASE; 160 if (!iwlwifi_mod_params.swcrypto) 161 priv->wowlan_support.flags |= 162 WIPHY_WOWLAN_SUPPORTS_GTK_REKEY | 163 WIPHY_WOWLAN_GTK_REKEY_FAILURE; 164 165 priv->wowlan_support.n_patterns = IWLAGN_WOWLAN_MAX_PATTERNS; 166 priv->wowlan_support.pattern_min_len = 167 IWLAGN_WOWLAN_MIN_PATTERN_LEN; 168 priv->wowlan_support.pattern_max_len = 169 IWLAGN_WOWLAN_MAX_PATTERN_LEN; 170 hw->wiphy->wowlan = &priv->wowlan_support; 171 } 172 #endif 173 174 if (iwlwifi_mod_params.power_save) 175 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT; 176 else 177 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT; 178 179 hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX; 180 /* we create the 802.11 header and a max-length SSID element */ 181 hw->wiphy->max_scan_ie_len = capa->max_probe_length - 24 - 34; 182 183 /* 184 * We don't use all queues: 4 and 9 are unused and any 185 * aggregation queue gets mapped down to the AC queue. 186 */ 187 hw->queues = IWLAGN_FIRST_AMPDU_QUEUE; 188 189 hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL; 190 191 if (priv->nvm_data->bands[NL80211_BAND_2GHZ].n_channels) 192 priv->hw->wiphy->bands[NL80211_BAND_2GHZ] = 193 &priv->nvm_data->bands[NL80211_BAND_2GHZ]; 194 if (priv->nvm_data->bands[NL80211_BAND_5GHZ].n_channels) 195 priv->hw->wiphy->bands[NL80211_BAND_5GHZ] = 196 &priv->nvm_data->bands[NL80211_BAND_5GHZ]; 197 198 hw->wiphy->hw_version = priv->trans->hw_id; 199 200 iwl_leds_init(priv); 201 202 wiphy_ext_feature_set(hw->wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST); 203 wiphy_ext_feature_set(hw->wiphy, NL80211_EXT_FEATURE_EXT_KEY_ID); 204 205 ret = ieee80211_register_hw(priv->hw); 206 if (ret) { 207 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret); 208 iwl_leds_exit(priv); 209 return ret; 210 } 211 priv->mac80211_registered = 1; 212 213 return 0; 214 } 215 216 void iwlagn_mac_unregister(struct iwl_priv *priv) 217 { 218 if (!priv->mac80211_registered) 219 return; 220 iwl_leds_exit(priv); 221 ieee80211_unregister_hw(priv->hw); 222 priv->mac80211_registered = 0; 223 } 224 225 static int __iwl_up(struct iwl_priv *priv) 226 { 227 struct iwl_rxon_context *ctx; 228 int ret; 229 230 lockdep_assert_held(&priv->mutex); 231 232 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) { 233 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n"); 234 return -EIO; 235 } 236 237 for_each_context(priv, ctx) { 238 ret = iwlagn_alloc_bcast_station(priv, ctx); 239 if (ret) { 240 iwl_dealloc_bcast_stations(priv); 241 return ret; 242 } 243 } 244 245 ret = iwl_trans_start_hw(priv->trans); 246 if (ret) { 247 IWL_ERR(priv, "Failed to start HW: %d\n", ret); 248 goto error; 249 } 250 251 ret = iwl_run_init_ucode(priv); 252 if (ret) { 253 IWL_ERR(priv, "Failed to run INIT ucode: %d\n", ret); 254 goto error; 255 } 256 257 ret = iwl_trans_start_hw(priv->trans); 258 if (ret) { 259 IWL_ERR(priv, "Failed to start HW: %d\n", ret); 260 goto error; 261 } 262 263 ret = iwl_load_ucode_wait_alive(priv, IWL_UCODE_REGULAR); 264 if (ret) { 265 IWL_ERR(priv, "Failed to start RT ucode: %d\n", ret); 266 goto error; 267 } 268 269 ret = iwl_alive_start(priv); 270 if (ret) 271 goto error; 272 return 0; 273 274 error: 275 set_bit(STATUS_EXIT_PENDING, &priv->status); 276 iwl_down(priv); 277 clear_bit(STATUS_EXIT_PENDING, &priv->status); 278 279 IWL_ERR(priv, "Unable to initialize device.\n"); 280 return ret; 281 } 282 283 static int iwlagn_mac_start(struct ieee80211_hw *hw) 284 { 285 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 286 int ret; 287 288 IWL_DEBUG_MAC80211(priv, "enter\n"); 289 290 /* we should be verifying the device is ready to be opened */ 291 mutex_lock(&priv->mutex); 292 ret = __iwl_up(priv); 293 mutex_unlock(&priv->mutex); 294 if (ret) 295 return ret; 296 297 IWL_DEBUG_INFO(priv, "Start UP work done.\n"); 298 299 /* Now we should be done, and the READY bit should be set. */ 300 if (WARN_ON(!test_bit(STATUS_READY, &priv->status))) 301 ret = -EIO; 302 303 iwlagn_led_enable(priv); 304 305 priv->is_open = 1; 306 IWL_DEBUG_MAC80211(priv, "leave\n"); 307 return 0; 308 } 309 310 static void iwlagn_mac_stop(struct ieee80211_hw *hw) 311 { 312 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 313 314 IWL_DEBUG_MAC80211(priv, "enter\n"); 315 316 if (!priv->is_open) 317 return; 318 319 priv->is_open = 0; 320 321 mutex_lock(&priv->mutex); 322 iwl_down(priv); 323 mutex_unlock(&priv->mutex); 324 325 iwl_cancel_deferred_work(priv); 326 327 flush_workqueue(priv->workqueue); 328 329 IWL_DEBUG_MAC80211(priv, "leave\n"); 330 } 331 332 static void iwlagn_mac_set_rekey_data(struct ieee80211_hw *hw, 333 struct ieee80211_vif *vif, 334 struct cfg80211_gtk_rekey_data *data) 335 { 336 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 337 338 if (iwlwifi_mod_params.swcrypto) 339 return; 340 341 IWL_DEBUG_MAC80211(priv, "enter\n"); 342 mutex_lock(&priv->mutex); 343 344 if (priv->contexts[IWL_RXON_CTX_BSS].vif != vif) 345 goto out; 346 347 memcpy(priv->kek, data->kek, NL80211_KEK_LEN); 348 memcpy(priv->kck, data->kck, NL80211_KCK_LEN); 349 priv->replay_ctr = 350 cpu_to_le64(be64_to_cpup((__be64 *)&data->replay_ctr)); 351 priv->have_rekey_data = true; 352 353 out: 354 mutex_unlock(&priv->mutex); 355 IWL_DEBUG_MAC80211(priv, "leave\n"); 356 } 357 358 #ifdef CONFIG_PM_SLEEP 359 360 static int iwlagn_mac_suspend(struct ieee80211_hw *hw, 361 struct cfg80211_wowlan *wowlan) 362 { 363 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 364 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS]; 365 int ret; 366 367 if (WARN_ON(!wowlan)) 368 return -EINVAL; 369 370 IWL_DEBUG_MAC80211(priv, "enter\n"); 371 mutex_lock(&priv->mutex); 372 373 /* Don't attempt WoWLAN when not associated, tear down instead. */ 374 if (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION || 375 !iwl_is_associated_ctx(ctx)) { 376 ret = 1; 377 goto out; 378 } 379 380 ret = iwlagn_suspend(priv, wowlan); 381 if (ret) 382 goto error; 383 384 /* let the ucode operate on its own */ 385 iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_SET, 386 CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE); 387 388 iwl_trans_d3_suspend(priv->trans, false, true); 389 390 goto out; 391 392 error: 393 priv->wowlan = false; 394 iwlagn_prepare_restart(priv); 395 ieee80211_restart_hw(priv->hw); 396 out: 397 mutex_unlock(&priv->mutex); 398 IWL_DEBUG_MAC80211(priv, "leave\n"); 399 400 return ret; 401 } 402 403 struct iwl_resume_data { 404 struct iwl_priv *priv; 405 struct iwlagn_wowlan_status *cmd; 406 bool valid; 407 }; 408 409 static bool iwl_resume_status_fn(struct iwl_notif_wait_data *notif_wait, 410 struct iwl_rx_packet *pkt, void *data) 411 { 412 struct iwl_resume_data *resume_data = data; 413 struct iwl_priv *priv = resume_data->priv; 414 415 if (iwl_rx_packet_payload_len(pkt) != sizeof(*resume_data->cmd)) { 416 IWL_ERR(priv, "rx wrong size data\n"); 417 return true; 418 } 419 memcpy(resume_data->cmd, pkt->data, sizeof(*resume_data->cmd)); 420 resume_data->valid = true; 421 422 return true; 423 } 424 425 static int iwlagn_mac_resume(struct ieee80211_hw *hw) 426 { 427 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 428 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS]; 429 struct ieee80211_vif *vif; 430 u32 base; 431 int ret; 432 enum iwl_d3_status d3_status; 433 struct error_table_start { 434 /* cf. struct iwl_error_event_table */ 435 u32 valid; 436 u32 error_id; 437 } err_info; 438 struct iwl_notification_wait status_wait; 439 static const u16 status_cmd[] = { 440 REPLY_WOWLAN_GET_STATUS, 441 }; 442 struct iwlagn_wowlan_status status_data = {}; 443 struct iwl_resume_data resume_data = { 444 .priv = priv, 445 .cmd = &status_data, 446 .valid = false, 447 }; 448 struct cfg80211_wowlan_wakeup wakeup = { 449 .pattern_idx = -1, 450 }; 451 #ifdef CONFIG_IWLWIFI_DEBUGFS 452 const struct fw_img *img; 453 #endif 454 455 IWL_DEBUG_MAC80211(priv, "enter\n"); 456 mutex_lock(&priv->mutex); 457 458 /* we'll clear ctx->vif during iwlagn_prepare_restart() */ 459 vif = ctx->vif; 460 461 ret = iwl_trans_d3_resume(priv->trans, &d3_status, false, true); 462 if (ret) 463 goto out_unlock; 464 465 if (d3_status != IWL_D3_STATUS_ALIVE) { 466 IWL_INFO(priv, "Device was reset during suspend\n"); 467 goto out_unlock; 468 } 469 470 /* uCode is no longer operating by itself */ 471 iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_CLR, 472 CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE); 473 474 base = priv->device_pointers.error_event_table; 475 if (!iwlagn_hw_valid_rtc_data_addr(base)) { 476 IWL_WARN(priv, "Invalid error table during resume!\n"); 477 goto out_unlock; 478 } 479 480 iwl_trans_read_mem_bytes(priv->trans, base, 481 &err_info, sizeof(err_info)); 482 483 if (err_info.valid) { 484 IWL_INFO(priv, "error table is valid (%d, 0x%x)\n", 485 err_info.valid, err_info.error_id); 486 if (err_info.error_id == RF_KILL_INDICATOR_FOR_WOWLAN) { 487 wakeup.rfkill_release = true; 488 ieee80211_report_wowlan_wakeup(vif, &wakeup, 489 GFP_KERNEL); 490 } 491 goto out_unlock; 492 } 493 494 #ifdef CONFIG_IWLWIFI_DEBUGFS 495 img = &priv->fw->img[IWL_UCODE_WOWLAN]; 496 if (!priv->wowlan_sram) 497 priv->wowlan_sram = 498 kzalloc(img->sec[IWL_UCODE_SECTION_DATA].len, 499 GFP_KERNEL); 500 501 if (priv->wowlan_sram) 502 iwl_trans_read_mem(priv->trans, 0x800000, 503 priv->wowlan_sram, 504 img->sec[IWL_UCODE_SECTION_DATA].len / 4); 505 #endif 506 507 /* 508 * This is very strange. The GET_STATUS command is sent but the device 509 * doesn't reply properly, it seems it doesn't close the RBD so one is 510 * always left open ... As a result, we need to send another command 511 * and have to reset the driver afterwards. As we need to switch to 512 * runtime firmware again that'll happen. 513 */ 514 515 iwl_init_notification_wait(&priv->notif_wait, &status_wait, status_cmd, 516 ARRAY_SIZE(status_cmd), iwl_resume_status_fn, 517 &resume_data); 518 519 iwl_dvm_send_cmd_pdu(priv, REPLY_WOWLAN_GET_STATUS, CMD_ASYNC, 0, NULL); 520 iwl_dvm_send_cmd_pdu(priv, REPLY_ECHO, CMD_ASYNC, 0, NULL); 521 /* an RBD is left open in the firmware now! */ 522 523 ret = iwl_wait_notification(&priv->notif_wait, &status_wait, HZ/5); 524 if (ret) 525 goto out_unlock; 526 527 if (resume_data.valid && priv->contexts[IWL_RXON_CTX_BSS].vif) { 528 u32 reasons = le32_to_cpu(status_data.wakeup_reason); 529 struct cfg80211_wowlan_wakeup *wakeup_report; 530 531 IWL_INFO(priv, "WoWLAN wakeup reason(s): 0x%.8x\n", reasons); 532 533 if (reasons) { 534 if (reasons & IWLAGN_WOWLAN_WAKEUP_MAGIC_PACKET) 535 wakeup.magic_pkt = true; 536 if (reasons & IWLAGN_WOWLAN_WAKEUP_PATTERN_MATCH) 537 wakeup.pattern_idx = status_data.pattern_number; 538 if (reasons & (IWLAGN_WOWLAN_WAKEUP_BEACON_MISS | 539 IWLAGN_WOWLAN_WAKEUP_LINK_CHANGE)) 540 wakeup.disconnect = true; 541 if (reasons & IWLAGN_WOWLAN_WAKEUP_GTK_REKEY_FAIL) 542 wakeup.gtk_rekey_failure = true; 543 if (reasons & IWLAGN_WOWLAN_WAKEUP_EAP_IDENT_REQ) 544 wakeup.eap_identity_req = true; 545 if (reasons & IWLAGN_WOWLAN_WAKEUP_4WAY_HANDSHAKE) 546 wakeup.four_way_handshake = true; 547 wakeup_report = &wakeup; 548 } else { 549 wakeup_report = NULL; 550 } 551 552 ieee80211_report_wowlan_wakeup(vif, wakeup_report, GFP_KERNEL); 553 } 554 555 priv->wowlan = false; 556 557 iwlagn_prepare_restart(priv); 558 559 memset((void *)&ctx->active, 0, sizeof(ctx->active)); 560 iwl_connection_init_rx_config(priv, ctx); 561 iwlagn_set_rxon_chain(priv, ctx); 562 563 out_unlock: 564 mutex_unlock(&priv->mutex); 565 IWL_DEBUG_MAC80211(priv, "leave\n"); 566 567 ieee80211_resume_disconnect(vif); 568 569 return 1; 570 } 571 572 static void iwlagn_mac_set_wakeup(struct ieee80211_hw *hw, bool enabled) 573 { 574 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 575 576 device_set_wakeup_enable(priv->trans->dev, enabled); 577 } 578 #endif 579 580 static void iwlagn_mac_tx(struct ieee80211_hw *hw, 581 struct ieee80211_tx_control *control, 582 struct sk_buff *skb) 583 { 584 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 585 586 if (iwlagn_tx_skb(priv, control->sta, skb)) 587 ieee80211_free_txskb(hw, skb); 588 } 589 590 static void iwlagn_mac_update_tkip_key(struct ieee80211_hw *hw, 591 struct ieee80211_vif *vif, 592 struct ieee80211_key_conf *keyconf, 593 struct ieee80211_sta *sta, 594 u32 iv32, u16 *phase1key) 595 { 596 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 597 598 iwl_update_tkip_key(priv, vif, keyconf, sta, iv32, phase1key); 599 } 600 601 static int iwlagn_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd, 602 struct ieee80211_vif *vif, 603 struct ieee80211_sta *sta, 604 struct ieee80211_key_conf *key) 605 { 606 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 607 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv; 608 struct iwl_rxon_context *ctx = vif_priv->ctx; 609 int ret; 610 bool is_default_wep_key = false; 611 612 IWL_DEBUG_MAC80211(priv, "enter\n"); 613 614 if (iwlwifi_mod_params.swcrypto) { 615 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n"); 616 return -EOPNOTSUPP; 617 } 618 619 switch (key->cipher) { 620 case WLAN_CIPHER_SUITE_TKIP: 621 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC; 622 fallthrough; 623 case WLAN_CIPHER_SUITE_CCMP: 624 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV; 625 break; 626 default: 627 break; 628 } 629 630 /* 631 * We could program these keys into the hardware as well, but we 632 * don't expect much multicast traffic in IBSS and having keys 633 * for more stations is probably more useful. 634 * 635 * Mark key TX-only and return 0. 636 */ 637 if (vif->type == NL80211_IFTYPE_ADHOC && 638 !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) { 639 key->hw_key_idx = WEP_INVALID_OFFSET; 640 return 0; 641 } 642 643 /* If they key was TX-only, accept deletion */ 644 if (cmd == DISABLE_KEY && key->hw_key_idx == WEP_INVALID_OFFSET) 645 return 0; 646 647 mutex_lock(&priv->mutex); 648 iwl_scan_cancel_timeout(priv, 100); 649 650 BUILD_BUG_ON(WEP_INVALID_OFFSET == IWLAGN_HW_KEY_DEFAULT); 651 652 /* 653 * If we are getting WEP group key and we didn't receive any key mapping 654 * so far, we are in legacy wep mode (group key only), otherwise we are 655 * in 1X mode. 656 * In legacy wep mode, we use another host command to the uCode. 657 */ 658 if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 || 659 key->cipher == WLAN_CIPHER_SUITE_WEP104) && !sta) { 660 if (cmd == SET_KEY) 661 is_default_wep_key = !ctx->key_mapping_keys; 662 else 663 is_default_wep_key = 664 key->hw_key_idx == IWLAGN_HW_KEY_DEFAULT; 665 } 666 667 668 switch (cmd) { 669 case SET_KEY: 670 if (is_default_wep_key) { 671 ret = iwl_set_default_wep_key(priv, vif_priv->ctx, key); 672 break; 673 } 674 ret = iwl_set_dynamic_key(priv, vif_priv->ctx, key, sta); 675 if (ret) { 676 /* 677 * can't add key for RX, but we don't need it 678 * in the device for TX so still return 0 679 */ 680 ret = 0; 681 key->hw_key_idx = WEP_INVALID_OFFSET; 682 } 683 684 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n"); 685 break; 686 case DISABLE_KEY: 687 if (is_default_wep_key) 688 ret = iwl_remove_default_wep_key(priv, ctx, key); 689 else 690 ret = iwl_remove_dynamic_key(priv, ctx, key, sta); 691 692 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n"); 693 break; 694 default: 695 ret = -EINVAL; 696 } 697 698 mutex_unlock(&priv->mutex); 699 IWL_DEBUG_MAC80211(priv, "leave\n"); 700 701 return ret; 702 } 703 704 static int iwlagn_mac_ampdu_action(struct ieee80211_hw *hw, 705 struct ieee80211_vif *vif, 706 struct ieee80211_ampdu_params *params) 707 { 708 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 709 int ret = -EINVAL; 710 struct ieee80211_sta *sta = params->sta; 711 enum ieee80211_ampdu_mlme_action action = params->action; 712 u16 tid = params->tid; 713 u16 *ssn = ¶ms->ssn; 714 u8 buf_size = params->buf_size; 715 struct iwl_station_priv *sta_priv = (void *) sta->drv_priv; 716 717 IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n", 718 sta->addr, tid); 719 720 if (!(priv->nvm_data->sku_cap_11n_enable)) 721 return -EACCES; 722 723 IWL_DEBUG_MAC80211(priv, "enter\n"); 724 mutex_lock(&priv->mutex); 725 726 switch (action) { 727 case IEEE80211_AMPDU_RX_START: 728 if (!iwl_enable_rx_ampdu()) 729 break; 730 IWL_DEBUG_HT(priv, "start Rx\n"); 731 ret = iwl_sta_rx_agg_start(priv, sta, tid, *ssn); 732 break; 733 case IEEE80211_AMPDU_RX_STOP: 734 IWL_DEBUG_HT(priv, "stop Rx\n"); 735 ret = iwl_sta_rx_agg_stop(priv, sta, tid); 736 break; 737 case IEEE80211_AMPDU_TX_START: 738 if (!priv->trans->ops->txq_enable) 739 break; 740 if (!iwl_enable_tx_ampdu()) 741 break; 742 IWL_DEBUG_HT(priv, "start Tx\n"); 743 ret = iwlagn_tx_agg_start(priv, vif, sta, tid, ssn); 744 break; 745 case IEEE80211_AMPDU_TX_STOP_FLUSH: 746 case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT: 747 IWL_DEBUG_HT(priv, "Flush Tx\n"); 748 ret = iwlagn_tx_agg_flush(priv, vif, sta, tid); 749 break; 750 case IEEE80211_AMPDU_TX_STOP_CONT: 751 IWL_DEBUG_HT(priv, "stop Tx\n"); 752 ret = iwlagn_tx_agg_stop(priv, vif, sta, tid); 753 if ((ret == 0) && (priv->agg_tids_count > 0)) { 754 priv->agg_tids_count--; 755 IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n", 756 priv->agg_tids_count); 757 } 758 if (!priv->agg_tids_count && 759 priv->hw_params.use_rts_for_aggregation) { 760 /* 761 * switch off RTS/CTS if it was previously enabled 762 */ 763 sta_priv->lq_sta.lq.general_params.flags &= 764 ~LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK; 765 iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif), 766 &sta_priv->lq_sta.lq, CMD_ASYNC, false); 767 } 768 break; 769 case IEEE80211_AMPDU_TX_OPERATIONAL: 770 ret = iwlagn_tx_agg_oper(priv, vif, sta, tid, buf_size); 771 break; 772 } 773 mutex_unlock(&priv->mutex); 774 IWL_DEBUG_MAC80211(priv, "leave\n"); 775 return ret; 776 } 777 778 static int iwlagn_mac_sta_add(struct ieee80211_hw *hw, 779 struct ieee80211_vif *vif, 780 struct ieee80211_sta *sta) 781 { 782 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 783 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv; 784 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv; 785 bool is_ap = vif->type == NL80211_IFTYPE_STATION; 786 int ret; 787 u8 sta_id; 788 789 IWL_DEBUG_INFO(priv, "proceeding to add station %pM\n", 790 sta->addr); 791 sta_priv->sta_id = IWL_INVALID_STATION; 792 793 atomic_set(&sta_priv->pending_frames, 0); 794 if (vif->type == NL80211_IFTYPE_AP) 795 sta_priv->client = true; 796 797 ret = iwl_add_station_common(priv, vif_priv->ctx, sta->addr, 798 is_ap, sta, &sta_id); 799 if (ret) { 800 IWL_ERR(priv, "Unable to add station %pM (%d)\n", 801 sta->addr, ret); 802 /* Should we return success if return code is EEXIST ? */ 803 return ret; 804 } 805 806 sta_priv->sta_id = sta_id; 807 808 return 0; 809 } 810 811 static int iwlagn_mac_sta_remove(struct ieee80211_hw *hw, 812 struct ieee80211_vif *vif, 813 struct ieee80211_sta *sta) 814 { 815 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 816 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv; 817 int ret; 818 819 IWL_DEBUG_INFO(priv, "proceeding to remove station %pM\n", sta->addr); 820 821 if (vif->type == NL80211_IFTYPE_STATION) { 822 /* 823 * Station will be removed from device when the RXON 824 * is set to unassociated -- just deactivate it here 825 * to avoid re-programming it. 826 */ 827 ret = 0; 828 iwl_deactivate_station(priv, sta_priv->sta_id, sta->addr); 829 } else { 830 ret = iwl_remove_station(priv, sta_priv->sta_id, sta->addr); 831 if (ret) 832 IWL_DEBUG_QUIET_RFKILL(priv, 833 "Error removing station %pM\n", sta->addr); 834 } 835 return ret; 836 } 837 838 static int iwlagn_mac_sta_state(struct ieee80211_hw *hw, 839 struct ieee80211_vif *vif, 840 struct ieee80211_sta *sta, 841 enum ieee80211_sta_state old_state, 842 enum ieee80211_sta_state new_state) 843 { 844 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 845 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv; 846 enum { 847 NONE, ADD, REMOVE, HT_RATE_INIT, ADD_RATE_INIT, 848 } op = NONE; 849 int ret; 850 851 IWL_DEBUG_MAC80211(priv, "station %pM state change %d->%d\n", 852 sta->addr, old_state, new_state); 853 854 mutex_lock(&priv->mutex); 855 if (vif->type == NL80211_IFTYPE_STATION) { 856 if (old_state == IEEE80211_STA_NOTEXIST && 857 new_state == IEEE80211_STA_NONE) 858 op = ADD; 859 else if (old_state == IEEE80211_STA_NONE && 860 new_state == IEEE80211_STA_NOTEXIST) 861 op = REMOVE; 862 else if (old_state == IEEE80211_STA_AUTH && 863 new_state == IEEE80211_STA_ASSOC) 864 op = HT_RATE_INIT; 865 } else { 866 if (old_state == IEEE80211_STA_AUTH && 867 new_state == IEEE80211_STA_ASSOC) 868 op = ADD_RATE_INIT; 869 else if (old_state == IEEE80211_STA_ASSOC && 870 new_state == IEEE80211_STA_AUTH) 871 op = REMOVE; 872 } 873 874 switch (op) { 875 case ADD: 876 ret = iwlagn_mac_sta_add(hw, vif, sta); 877 if (ret) 878 break; 879 /* 880 * Clear the in-progress flag, the AP station entry was added 881 * but we'll initialize LQ only when we've associated (which 882 * would also clear the in-progress flag). This is necessary 883 * in case we never initialize LQ because association fails. 884 */ 885 spin_lock_bh(&priv->sta_lock); 886 priv->stations[iwl_sta_id(sta)].used &= 887 ~IWL_STA_UCODE_INPROGRESS; 888 spin_unlock_bh(&priv->sta_lock); 889 break; 890 case REMOVE: 891 ret = iwlagn_mac_sta_remove(hw, vif, sta); 892 break; 893 case ADD_RATE_INIT: 894 ret = iwlagn_mac_sta_add(hw, vif, sta); 895 if (ret) 896 break; 897 /* Initialize rate scaling */ 898 IWL_DEBUG_INFO(priv, 899 "Initializing rate scaling for station %pM\n", 900 sta->addr); 901 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta)); 902 ret = 0; 903 break; 904 case HT_RATE_INIT: 905 /* Initialize rate scaling */ 906 ret = iwl_sta_update_ht(priv, vif_priv->ctx, sta); 907 if (ret) 908 break; 909 IWL_DEBUG_INFO(priv, 910 "Initializing rate scaling for station %pM\n", 911 sta->addr); 912 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta)); 913 ret = 0; 914 break; 915 default: 916 ret = 0; 917 break; 918 } 919 920 /* 921 * mac80211 might WARN if we fail, but due the way we 922 * (badly) handle hard rfkill, we might fail here 923 */ 924 if (iwl_is_rfkill(priv)) 925 ret = 0; 926 927 mutex_unlock(&priv->mutex); 928 IWL_DEBUG_MAC80211(priv, "leave\n"); 929 930 return ret; 931 } 932 933 static void iwlagn_mac_channel_switch(struct ieee80211_hw *hw, 934 struct ieee80211_vif *vif, 935 struct ieee80211_channel_switch *ch_switch) 936 { 937 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 938 struct ieee80211_conf *conf = &hw->conf; 939 struct ieee80211_channel *channel = ch_switch->chandef.chan; 940 struct iwl_ht_config *ht_conf = &priv->current_ht_config; 941 /* 942 * MULTI-FIXME 943 * When we add support for multiple interfaces, we need to 944 * revisit this. The channel switch command in the device 945 * only affects the BSS context, but what does that really 946 * mean? And what if we get a CSA on the second interface? 947 * This needs a lot of work. 948 */ 949 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS]; 950 u16 ch; 951 952 IWL_DEBUG_MAC80211(priv, "enter\n"); 953 954 mutex_lock(&priv->mutex); 955 956 if (iwl_is_rfkill(priv)) 957 goto out; 958 959 if (test_bit(STATUS_EXIT_PENDING, &priv->status) || 960 test_bit(STATUS_SCANNING, &priv->status) || 961 test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status)) 962 goto out; 963 964 if (!iwl_is_associated_ctx(ctx)) 965 goto out; 966 967 if (!priv->lib->set_channel_switch) 968 goto out; 969 970 ch = channel->hw_value; 971 if (le16_to_cpu(ctx->active.channel) == ch) 972 goto out; 973 974 priv->current_ht_config.smps = conf->smps_mode; 975 976 /* Configure HT40 channels */ 977 switch (cfg80211_get_chandef_type(&ch_switch->chandef)) { 978 case NL80211_CHAN_NO_HT: 979 case NL80211_CHAN_HT20: 980 ctx->ht.is_40mhz = false; 981 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE; 982 break; 983 case NL80211_CHAN_HT40MINUS: 984 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_BELOW; 985 ctx->ht.is_40mhz = true; 986 break; 987 case NL80211_CHAN_HT40PLUS: 988 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_ABOVE; 989 ctx->ht.is_40mhz = true; 990 break; 991 } 992 993 if ((le16_to_cpu(ctx->staging.channel) != ch)) 994 ctx->staging.flags = 0; 995 996 iwl_set_rxon_channel(priv, channel, ctx); 997 iwl_set_rxon_ht(priv, ht_conf); 998 iwl_set_flags_for_band(priv, ctx, channel->band, ctx->vif); 999 1000 /* 1001 * at this point, staging_rxon has the 1002 * configuration for channel switch 1003 */ 1004 set_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status); 1005 priv->switch_channel = cpu_to_le16(ch); 1006 if (priv->lib->set_channel_switch(priv, ch_switch)) { 1007 clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status); 1008 priv->switch_channel = 0; 1009 ieee80211_chswitch_done(ctx->vif, false); 1010 } 1011 1012 out: 1013 mutex_unlock(&priv->mutex); 1014 IWL_DEBUG_MAC80211(priv, "leave\n"); 1015 } 1016 1017 void iwl_chswitch_done(struct iwl_priv *priv, bool is_success) 1018 { 1019 /* 1020 * MULTI-FIXME 1021 * See iwlagn_mac_channel_switch. 1022 */ 1023 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS]; 1024 1025 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) 1026 return; 1027 1028 if (!test_and_clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status)) 1029 return; 1030 1031 if (ctx->vif) 1032 ieee80211_chswitch_done(ctx->vif, is_success); 1033 } 1034 1035 static void iwlagn_configure_filter(struct ieee80211_hw *hw, 1036 unsigned int changed_flags, 1037 unsigned int *total_flags, 1038 u64 multicast) 1039 { 1040 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1041 __le32 filter_or = 0, filter_nand = 0; 1042 struct iwl_rxon_context *ctx; 1043 1044 #define CHK(test, flag) do { \ 1045 if (*total_flags & (test)) \ 1046 filter_or |= (flag); \ 1047 else \ 1048 filter_nand |= (flag); \ 1049 } while (0) 1050 1051 IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n", 1052 changed_flags, *total_flags); 1053 1054 CHK(FIF_OTHER_BSS, RXON_FILTER_PROMISC_MSK); 1055 /* Setting _just_ RXON_FILTER_CTL2HOST_MSK causes FH errors */ 1056 CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_PROMISC_MSK); 1057 CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK); 1058 1059 #undef CHK 1060 1061 mutex_lock(&priv->mutex); 1062 1063 for_each_context(priv, ctx) { 1064 ctx->staging.filter_flags &= ~filter_nand; 1065 ctx->staging.filter_flags |= filter_or; 1066 1067 /* 1068 * Not committing directly because hardware can perform a scan, 1069 * but we'll eventually commit the filter flags change anyway. 1070 */ 1071 } 1072 1073 mutex_unlock(&priv->mutex); 1074 1075 /* 1076 * Receiving all multicast frames is always enabled by the 1077 * default flags setup in iwl_connection_init_rx_config() 1078 * since we currently do not support programming multicast 1079 * filters into the device. 1080 */ 1081 *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | 1082 FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL; 1083 } 1084 1085 static void iwlagn_mac_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 1086 u32 queues, bool drop) 1087 { 1088 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1089 u32 scd_queues; 1090 1091 mutex_lock(&priv->mutex); 1092 IWL_DEBUG_MAC80211(priv, "enter\n"); 1093 1094 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) { 1095 IWL_DEBUG_TX(priv, "Aborting flush due to device shutdown\n"); 1096 goto done; 1097 } 1098 if (iwl_is_rfkill(priv)) { 1099 IWL_DEBUG_TX(priv, "Aborting flush due to RF Kill\n"); 1100 goto done; 1101 } 1102 1103 scd_queues = BIT(priv->trans->trans_cfg->base_params->num_of_queues) - 1; 1104 scd_queues &= ~(BIT(IWL_IPAN_CMD_QUEUE_NUM) | 1105 BIT(IWL_DEFAULT_CMD_QUEUE_NUM)); 1106 1107 if (drop) { 1108 IWL_DEBUG_TX_QUEUES(priv, "Flushing SCD queues: 0x%x\n", 1109 scd_queues); 1110 if (iwlagn_txfifo_flush(priv, scd_queues)) { 1111 IWL_ERR(priv, "flush request fail\n"); 1112 goto done; 1113 } 1114 } 1115 1116 IWL_DEBUG_TX_QUEUES(priv, "wait transmit/flush all frames\n"); 1117 iwl_trans_wait_tx_queues_empty(priv->trans, scd_queues); 1118 done: 1119 mutex_unlock(&priv->mutex); 1120 IWL_DEBUG_MAC80211(priv, "leave\n"); 1121 } 1122 1123 static void iwlagn_mac_event_callback(struct ieee80211_hw *hw, 1124 struct ieee80211_vif *vif, 1125 const struct ieee80211_event *event) 1126 { 1127 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1128 1129 if (event->type != RSSI_EVENT) 1130 return; 1131 1132 IWL_DEBUG_MAC80211(priv, "enter\n"); 1133 1134 if (priv->lib->bt_params && 1135 priv->lib->bt_params->advanced_bt_coexist) { 1136 if (event->u.rssi.data == RSSI_EVENT_LOW) 1137 priv->bt_enable_pspoll = true; 1138 else if (event->u.rssi.data == RSSI_EVENT_HIGH) 1139 priv->bt_enable_pspoll = false; 1140 1141 queue_work(priv->workqueue, &priv->bt_runtime_config); 1142 } else { 1143 IWL_DEBUG_MAC80211(priv, "Advanced BT coex disabled," 1144 "ignoring RSSI callback\n"); 1145 } 1146 1147 IWL_DEBUG_MAC80211(priv, "leave\n"); 1148 } 1149 1150 static int iwlagn_mac_set_tim(struct ieee80211_hw *hw, 1151 struct ieee80211_sta *sta, bool set) 1152 { 1153 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1154 1155 queue_work(priv->workqueue, &priv->beacon_update); 1156 1157 return 0; 1158 } 1159 1160 static int iwlagn_mac_conf_tx(struct ieee80211_hw *hw, 1161 struct ieee80211_vif *vif, u16 queue, 1162 const struct ieee80211_tx_queue_params *params) 1163 { 1164 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1165 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv; 1166 struct iwl_rxon_context *ctx = vif_priv->ctx; 1167 int q; 1168 1169 if (WARN_ON(!ctx)) 1170 return -EINVAL; 1171 1172 IWL_DEBUG_MAC80211(priv, "enter\n"); 1173 1174 if (!iwl_is_ready_rf(priv)) { 1175 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n"); 1176 return -EIO; 1177 } 1178 1179 if (queue >= AC_NUM) { 1180 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue); 1181 return 0; 1182 } 1183 1184 q = AC_NUM - 1 - queue; 1185 1186 mutex_lock(&priv->mutex); 1187 1188 ctx->qos_data.def_qos_parm.ac[q].cw_min = 1189 cpu_to_le16(params->cw_min); 1190 ctx->qos_data.def_qos_parm.ac[q].cw_max = 1191 cpu_to_le16(params->cw_max); 1192 ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs; 1193 ctx->qos_data.def_qos_parm.ac[q].edca_txop = 1194 cpu_to_le16((params->txop * 32)); 1195 1196 ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0; 1197 1198 mutex_unlock(&priv->mutex); 1199 1200 IWL_DEBUG_MAC80211(priv, "leave\n"); 1201 return 0; 1202 } 1203 1204 static int iwlagn_mac_tx_last_beacon(struct ieee80211_hw *hw) 1205 { 1206 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1207 1208 return priv->ibss_manager == IWL_IBSS_MANAGER; 1209 } 1210 1211 static int iwl_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx) 1212 { 1213 iwl_connection_init_rx_config(priv, ctx); 1214 1215 iwlagn_set_rxon_chain(priv, ctx); 1216 1217 return iwlagn_commit_rxon(priv, ctx); 1218 } 1219 1220 static int iwl_setup_interface(struct iwl_priv *priv, 1221 struct iwl_rxon_context *ctx) 1222 { 1223 struct ieee80211_vif *vif = ctx->vif; 1224 int err, ac; 1225 1226 lockdep_assert_held(&priv->mutex); 1227 1228 /* 1229 * This variable will be correct only when there's just 1230 * a single context, but all code using it is for hardware 1231 * that supports only one context. 1232 */ 1233 priv->iw_mode = vif->type; 1234 1235 ctx->is_active = true; 1236 1237 err = iwl_set_mode(priv, ctx); 1238 if (err) { 1239 if (!ctx->always_active) 1240 ctx->is_active = false; 1241 return err; 1242 } 1243 1244 if (priv->lib->bt_params && priv->lib->bt_params->advanced_bt_coexist && 1245 vif->type == NL80211_IFTYPE_ADHOC) { 1246 /* 1247 * pretend to have high BT traffic as long as we 1248 * are operating in IBSS mode, as this will cause 1249 * the rate scaling etc. to behave as intended. 1250 */ 1251 priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH; 1252 } 1253 1254 /* set up queue mappings */ 1255 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 1256 vif->hw_queue[ac] = ctx->ac_to_queue[ac]; 1257 1258 if (vif->type == NL80211_IFTYPE_AP) 1259 vif->cab_queue = ctx->mcast_queue; 1260 else 1261 vif->cab_queue = IEEE80211_INVAL_HW_QUEUE; 1262 1263 return 0; 1264 } 1265 1266 static int iwlagn_mac_add_interface(struct ieee80211_hw *hw, 1267 struct ieee80211_vif *vif) 1268 { 1269 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1270 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv; 1271 struct iwl_rxon_context *tmp, *ctx = NULL; 1272 int err; 1273 enum nl80211_iftype viftype = ieee80211_vif_type_p2p(vif); 1274 bool reset = false; 1275 1276 IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n", 1277 viftype, vif->addr); 1278 1279 mutex_lock(&priv->mutex); 1280 1281 if (!iwl_is_ready_rf(priv)) { 1282 IWL_WARN(priv, "Try to add interface when device not ready\n"); 1283 err = -EINVAL; 1284 goto out; 1285 } 1286 1287 for_each_context(priv, tmp) { 1288 u32 possible_modes = 1289 tmp->interface_modes | tmp->exclusive_interface_modes; 1290 1291 if (tmp->vif) { 1292 /* On reset we need to add the same interface again */ 1293 if (tmp->vif == vif) { 1294 reset = true; 1295 ctx = tmp; 1296 break; 1297 } 1298 1299 /* check if this busy context is exclusive */ 1300 if (tmp->exclusive_interface_modes & 1301 BIT(tmp->vif->type)) { 1302 err = -EINVAL; 1303 goto out; 1304 } 1305 continue; 1306 } 1307 1308 if (!(possible_modes & BIT(viftype))) 1309 continue; 1310 1311 /* have maybe usable context w/o interface */ 1312 ctx = tmp; 1313 break; 1314 } 1315 1316 if (!ctx) { 1317 err = -EOPNOTSUPP; 1318 goto out; 1319 } 1320 1321 vif_priv->ctx = ctx; 1322 ctx->vif = vif; 1323 1324 /* 1325 * In SNIFFER device type, the firmware reports the FCS to 1326 * the host, rather than snipping it off. Unfortunately, 1327 * mac80211 doesn't (yet) provide a per-packet flag for 1328 * this, so that we have to set the hardware flag based 1329 * on the interfaces added. As the monitor interface can 1330 * only be present by itself, and will be removed before 1331 * other interfaces are added, this is safe. 1332 */ 1333 if (vif->type == NL80211_IFTYPE_MONITOR) 1334 ieee80211_hw_set(priv->hw, RX_INCLUDES_FCS); 1335 else 1336 __clear_bit(IEEE80211_HW_RX_INCLUDES_FCS, priv->hw->flags); 1337 1338 err = iwl_setup_interface(priv, ctx); 1339 if (!err || reset) 1340 goto out; 1341 1342 ctx->vif = NULL; 1343 priv->iw_mode = NL80211_IFTYPE_STATION; 1344 out: 1345 mutex_unlock(&priv->mutex); 1346 1347 IWL_DEBUG_MAC80211(priv, "leave\n"); 1348 return err; 1349 } 1350 1351 static void iwl_teardown_interface(struct iwl_priv *priv, 1352 struct ieee80211_vif *vif, 1353 bool mode_change) 1354 { 1355 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif); 1356 1357 lockdep_assert_held(&priv->mutex); 1358 1359 if (priv->scan_vif == vif) { 1360 iwl_scan_cancel_timeout(priv, 200); 1361 iwl_force_scan_end(priv); 1362 } 1363 1364 if (!mode_change) { 1365 iwl_set_mode(priv, ctx); 1366 if (!ctx->always_active) 1367 ctx->is_active = false; 1368 } 1369 1370 /* 1371 * When removing the IBSS interface, overwrite the 1372 * BT traffic load with the stored one from the last 1373 * notification, if any. If this is a device that 1374 * doesn't implement this, this has no effect since 1375 * both values are the same and zero. 1376 */ 1377 if (vif->type == NL80211_IFTYPE_ADHOC) 1378 priv->bt_traffic_load = priv->last_bt_traffic_load; 1379 } 1380 1381 static void iwlagn_mac_remove_interface(struct ieee80211_hw *hw, 1382 struct ieee80211_vif *vif) 1383 { 1384 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1385 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif); 1386 1387 IWL_DEBUG_MAC80211(priv, "enter\n"); 1388 1389 mutex_lock(&priv->mutex); 1390 1391 WARN_ON(ctx->vif != vif); 1392 ctx->vif = NULL; 1393 1394 iwl_teardown_interface(priv, vif, false); 1395 1396 mutex_unlock(&priv->mutex); 1397 1398 IWL_DEBUG_MAC80211(priv, "leave\n"); 1399 1400 } 1401 1402 static int iwlagn_mac_change_interface(struct ieee80211_hw *hw, 1403 struct ieee80211_vif *vif, 1404 enum nl80211_iftype newtype, bool newp2p) 1405 { 1406 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1407 struct iwl_rxon_context *ctx, *tmp; 1408 enum nl80211_iftype newviftype = newtype; 1409 u32 interface_modes; 1410 int err; 1411 1412 IWL_DEBUG_MAC80211(priv, "enter\n"); 1413 1414 newtype = ieee80211_iftype_p2p(newtype, newp2p); 1415 1416 mutex_lock(&priv->mutex); 1417 1418 ctx = iwl_rxon_ctx_from_vif(vif); 1419 1420 /* 1421 * To simplify this code, only support changes on the 1422 * BSS context. The PAN context is usually reassigned 1423 * by creating/removing P2P interfaces anyway. 1424 */ 1425 if (ctx->ctxid != IWL_RXON_CTX_BSS) { 1426 err = -EBUSY; 1427 goto out; 1428 } 1429 1430 if (!ctx->vif || !iwl_is_ready_rf(priv)) { 1431 /* 1432 * Huh? But wait ... this can maybe happen when 1433 * we're in the middle of a firmware restart! 1434 */ 1435 err = -EBUSY; 1436 goto out; 1437 } 1438 1439 /* Check if the switch is supported in the same context */ 1440 interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes; 1441 if (!(interface_modes & BIT(newtype))) { 1442 err = -EBUSY; 1443 goto out; 1444 } 1445 1446 if (ctx->exclusive_interface_modes & BIT(newtype)) { 1447 for_each_context(priv, tmp) { 1448 if (ctx == tmp) 1449 continue; 1450 1451 if (!tmp->is_active) 1452 continue; 1453 1454 /* 1455 * The current mode switch would be exclusive, but 1456 * another context is active ... refuse the switch. 1457 */ 1458 err = -EBUSY; 1459 goto out; 1460 } 1461 } 1462 1463 /* success */ 1464 iwl_teardown_interface(priv, vif, true); 1465 vif->type = newviftype; 1466 vif->p2p = newp2p; 1467 err = iwl_setup_interface(priv, ctx); 1468 WARN_ON(err); 1469 /* 1470 * We've switched internally, but submitting to the 1471 * device may have failed for some reason. Mask this 1472 * error, because otherwise mac80211 will not switch 1473 * (and set the interface type back) and we'll be 1474 * out of sync with it. 1475 */ 1476 err = 0; 1477 1478 out: 1479 mutex_unlock(&priv->mutex); 1480 IWL_DEBUG_MAC80211(priv, "leave\n"); 1481 1482 return err; 1483 } 1484 1485 static int iwlagn_mac_hw_scan(struct ieee80211_hw *hw, 1486 struct ieee80211_vif *vif, 1487 struct ieee80211_scan_request *hw_req) 1488 { 1489 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1490 struct cfg80211_scan_request *req = &hw_req->req; 1491 int ret; 1492 1493 IWL_DEBUG_MAC80211(priv, "enter\n"); 1494 1495 if (req->n_channels == 0) 1496 return -EINVAL; 1497 1498 mutex_lock(&priv->mutex); 1499 1500 /* 1501 * If an internal scan is in progress, just set 1502 * up the scan_request as per above. 1503 */ 1504 if (priv->scan_type != IWL_SCAN_NORMAL) { 1505 IWL_DEBUG_SCAN(priv, 1506 "SCAN request during internal scan - defer\n"); 1507 priv->scan_request = req; 1508 priv->scan_vif = vif; 1509 ret = 0; 1510 } else { 1511 priv->scan_request = req; 1512 priv->scan_vif = vif; 1513 /* 1514 * mac80211 will only ask for one band at a time 1515 * so using channels[0] here is ok 1516 */ 1517 ret = iwl_scan_initiate(priv, vif, IWL_SCAN_NORMAL, 1518 req->channels[0]->band); 1519 if (ret) { 1520 priv->scan_request = NULL; 1521 priv->scan_vif = NULL; 1522 } 1523 } 1524 1525 IWL_DEBUG_MAC80211(priv, "leave\n"); 1526 1527 mutex_unlock(&priv->mutex); 1528 1529 return ret; 1530 } 1531 1532 static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id) 1533 { 1534 struct iwl_addsta_cmd cmd = { 1535 .mode = STA_CONTROL_MODIFY_MSK, 1536 .station_flags_msk = STA_FLG_PWR_SAVE_MSK, 1537 .sta.sta_id = sta_id, 1538 }; 1539 1540 iwl_send_add_sta(priv, &cmd, CMD_ASYNC); 1541 } 1542 1543 static void iwlagn_mac_sta_notify(struct ieee80211_hw *hw, 1544 struct ieee80211_vif *vif, 1545 enum sta_notify_cmd cmd, 1546 struct ieee80211_sta *sta) 1547 { 1548 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1549 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv; 1550 int sta_id; 1551 1552 IWL_DEBUG_MAC80211(priv, "enter\n"); 1553 1554 switch (cmd) { 1555 case STA_NOTIFY_SLEEP: 1556 WARN_ON(!sta_priv->client); 1557 sta_priv->asleep = true; 1558 if (atomic_read(&sta_priv->pending_frames) > 0) 1559 ieee80211_sta_block_awake(hw, sta, true); 1560 break; 1561 case STA_NOTIFY_AWAKE: 1562 WARN_ON(!sta_priv->client); 1563 if (!sta_priv->asleep) 1564 break; 1565 sta_priv->asleep = false; 1566 sta_id = iwl_sta_id(sta); 1567 if (sta_id != IWL_INVALID_STATION) 1568 iwl_sta_modify_ps_wake(priv, sta_id); 1569 break; 1570 default: 1571 break; 1572 } 1573 IWL_DEBUG_MAC80211(priv, "leave\n"); 1574 } 1575 1576 const struct ieee80211_ops iwlagn_hw_ops = { 1577 .tx = iwlagn_mac_tx, 1578 .start = iwlagn_mac_start, 1579 .stop = iwlagn_mac_stop, 1580 #ifdef CONFIG_PM_SLEEP 1581 .suspend = iwlagn_mac_suspend, 1582 .resume = iwlagn_mac_resume, 1583 .set_wakeup = iwlagn_mac_set_wakeup, 1584 #endif 1585 .add_interface = iwlagn_mac_add_interface, 1586 .remove_interface = iwlagn_mac_remove_interface, 1587 .change_interface = iwlagn_mac_change_interface, 1588 .config = iwlagn_mac_config, 1589 .configure_filter = iwlagn_configure_filter, 1590 .set_key = iwlagn_mac_set_key, 1591 .update_tkip_key = iwlagn_mac_update_tkip_key, 1592 .set_rekey_data = iwlagn_mac_set_rekey_data, 1593 .conf_tx = iwlagn_mac_conf_tx, 1594 .bss_info_changed = iwlagn_bss_info_changed, 1595 .ampdu_action = iwlagn_mac_ampdu_action, 1596 .hw_scan = iwlagn_mac_hw_scan, 1597 .sta_notify = iwlagn_mac_sta_notify, 1598 .sta_state = iwlagn_mac_sta_state, 1599 .channel_switch = iwlagn_mac_channel_switch, 1600 .flush = iwlagn_mac_flush, 1601 .tx_last_beacon = iwlagn_mac_tx_last_beacon, 1602 .event_callback = iwlagn_mac_event_callback, 1603 .set_tim = iwlagn_mac_set_tim, 1604 }; 1605 1606 /* This function both allocates and initializes hw and priv. */ 1607 struct ieee80211_hw *iwl_alloc_all(void) 1608 { 1609 struct iwl_priv *priv; 1610 struct iwl_op_mode *op_mode; 1611 /* mac80211 allocates memory for this device instance, including 1612 * space for this driver's private structure */ 1613 struct ieee80211_hw *hw; 1614 1615 hw = ieee80211_alloc_hw(sizeof(struct iwl_priv) + 1616 sizeof(struct iwl_op_mode), &iwlagn_hw_ops); 1617 if (!hw) 1618 goto out; 1619 1620 op_mode = hw->priv; 1621 priv = IWL_OP_MODE_GET_DVM(op_mode); 1622 priv->hw = hw; 1623 1624 out: 1625 return hw; 1626 } 1627