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