1 // SPDX-License-Identifier: GPL-2.0-only 2 /****************************************************************************** 3 * 4 * Copyright(c) 2003 - 2014 Intel Corporation. All rights reserved. 5 * Copyright(C) 2018 - 2019, 2022 - 2023 Intel Corporation 6 * 7 * Portions of this file are derived from the ipw3945 project, as well 8 * as portions of the ieee80211 subsystem header files. 9 *****************************************************************************/ 10 #include <linux/kernel.h> 11 #include <linux/module.h> 12 #include <linux/slab.h> 13 #include <linux/dma-mapping.h> 14 #include <linux/delay.h> 15 #include <linux/sched.h> 16 #include <linux/skbuff.h> 17 #include <linux/netdevice.h> 18 #include <linux/etherdevice.h> 19 #include <linux/if_arp.h> 20 21 #include <net/ieee80211_radiotap.h> 22 #include <net/mac80211.h> 23 24 #include <asm/div64.h> 25 26 #include "iwl-io.h" 27 #include "iwl-trans.h" 28 #include "iwl-op-mode.h" 29 #include "iwl-modparams.h" 30 31 #include "dev.h" 32 #include "calib.h" 33 #include "agn.h" 34 35 /***************************************************************************** 36 * 37 * mac80211 entry point functions 38 * 39 *****************************************************************************/ 40 41 static const struct ieee80211_iface_limit iwlagn_sta_ap_limits[] = { 42 { 43 .max = 1, 44 .types = BIT(NL80211_IFTYPE_STATION), 45 }, 46 { 47 .max = 1, 48 .types = BIT(NL80211_IFTYPE_AP), 49 }, 50 }; 51 52 static const struct ieee80211_iface_limit iwlagn_2sta_limits[] = { 53 { 54 .max = 2, 55 .types = BIT(NL80211_IFTYPE_STATION), 56 }, 57 }; 58 59 static const struct ieee80211_iface_combination 60 iwlagn_iface_combinations_dualmode[] = { 61 { .num_different_channels = 1, 62 .max_interfaces = 2, 63 .beacon_int_infra_match = true, 64 .limits = iwlagn_sta_ap_limits, 65 .n_limits = ARRAY_SIZE(iwlagn_sta_ap_limits), 66 }, 67 { .num_different_channels = 1, 68 .max_interfaces = 2, 69 .limits = iwlagn_2sta_limits, 70 .n_limits = ARRAY_SIZE(iwlagn_2sta_limits), 71 }, 72 }; 73 74 /* 75 * Not a mac80211 entry point function, but it fits in with all the 76 * other mac80211 functions grouped here. 77 */ 78 int iwlagn_mac_setup_register(struct iwl_priv *priv, 79 const struct iwl_ucode_capabilities *capa) 80 { 81 int ret; 82 struct ieee80211_hw *hw = priv->hw; 83 struct iwl_rxon_context *ctx; 84 85 hw->rate_control_algorithm = "iwl-agn-rs"; 86 87 /* Tell mac80211 our characteristics */ 88 ieee80211_hw_set(hw, SIGNAL_DBM); 89 ieee80211_hw_set(hw, AMPDU_AGGREGATION); 90 ieee80211_hw_set(hw, NEED_DTIM_BEFORE_ASSOC); 91 ieee80211_hw_set(hw, SPECTRUM_MGMT); 92 ieee80211_hw_set(hw, REPORTS_TX_ACK_STATUS); 93 ieee80211_hw_set(hw, QUEUE_CONTROL); 94 ieee80211_hw_set(hw, SUPPORTS_PS); 95 ieee80211_hw_set(hw, SUPPORTS_DYNAMIC_PS); 96 ieee80211_hw_set(hw, SUPPORT_FAST_XMIT); 97 ieee80211_hw_set(hw, WANT_MONITOR_VIF); 98 99 if (priv->trans->max_skb_frags) 100 hw->netdev_features = NETIF_F_HIGHDMA | NETIF_F_SG; 101 102 hw->offchannel_tx_hw_queue = IWL_AUX_QUEUE; 103 hw->radiotap_mcs_details |= IEEE80211_RADIOTAP_MCS_HAVE_FMT; 104 105 /* 106 * Including the following line will crash some AP's. This 107 * workaround removes the stimulus which causes the crash until 108 * the AP software can be fixed. 109 hw->max_tx_aggregation_subframes = LINK_QUAL_AGG_FRAME_LIMIT_DEF; 110 */ 111 112 if (priv->nvm_data->sku_cap_11n_enable) 113 hw->wiphy->features |= NL80211_FEATURE_DYNAMIC_SMPS | 114 NL80211_FEATURE_STATIC_SMPS; 115 116 /* 117 * Enable 11w if advertised by firmware and software crypto 118 * is not enabled (as the firmware will interpret some mgmt 119 * packets, so enabling it with software crypto isn't safe) 120 */ 121 if (priv->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_MFP && 122 !iwlwifi_mod_params.swcrypto) 123 ieee80211_hw_set(hw, MFP_CAPABLE); 124 125 hw->sta_data_size = sizeof(struct iwl_station_priv); 126 hw->vif_data_size = sizeof(struct iwl_vif_priv); 127 128 for_each_context(priv, ctx) { 129 hw->wiphy->interface_modes |= ctx->interface_modes; 130 hw->wiphy->interface_modes |= ctx->exclusive_interface_modes; 131 } 132 133 BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2); 134 135 if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) { 136 hw->wiphy->iface_combinations = 137 iwlagn_iface_combinations_dualmode; 138 hw->wiphy->n_iface_combinations = 139 ARRAY_SIZE(iwlagn_iface_combinations_dualmode); 140 } 141 142 hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN; 143 hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG | 144 REGULATORY_DISABLE_BEACON_HINTS; 145 146 #ifdef CONFIG_PM_SLEEP 147 if (priv->fw->img[IWL_UCODE_WOWLAN].num_sec && 148 priv->trans->ops->d3_suspend && 149 priv->trans->ops->d3_resume && 150 device_can_wakeup(priv->trans->dev)) { 151 priv->wowlan_support.flags = WIPHY_WOWLAN_MAGIC_PKT | 152 WIPHY_WOWLAN_DISCONNECT | 153 WIPHY_WOWLAN_EAP_IDENTITY_REQ | 154 WIPHY_WOWLAN_RFKILL_RELEASE; 155 if (!iwlwifi_mod_params.swcrypto) 156 priv->wowlan_support.flags |= 157 WIPHY_WOWLAN_SUPPORTS_GTK_REKEY | 158 WIPHY_WOWLAN_GTK_REKEY_FAILURE; 159 160 priv->wowlan_support.n_patterns = IWLAGN_WOWLAN_MAX_PATTERNS; 161 priv->wowlan_support.pattern_min_len = 162 IWLAGN_WOWLAN_MIN_PATTERN_LEN; 163 priv->wowlan_support.pattern_max_len = 164 IWLAGN_WOWLAN_MAX_PATTERN_LEN; 165 hw->wiphy->wowlan = &priv->wowlan_support; 166 } 167 #endif 168 169 if (iwlwifi_mod_params.power_save) 170 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT; 171 else 172 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT; 173 174 hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX; 175 /* we create the 802.11 header and a max-length SSID element */ 176 hw->wiphy->max_scan_ie_len = capa->max_probe_length - 24 - 34; 177 178 /* 179 * We don't use all queues: 4 and 9 are unused and any 180 * aggregation queue gets mapped down to the AC queue. 181 */ 182 hw->queues = IWLAGN_FIRST_AMPDU_QUEUE; 183 184 hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL; 185 186 if (priv->nvm_data->bands[NL80211_BAND_2GHZ].n_channels) 187 priv->hw->wiphy->bands[NL80211_BAND_2GHZ] = 188 &priv->nvm_data->bands[NL80211_BAND_2GHZ]; 189 if (priv->nvm_data->bands[NL80211_BAND_5GHZ].n_channels) 190 priv->hw->wiphy->bands[NL80211_BAND_5GHZ] = 191 &priv->nvm_data->bands[NL80211_BAND_5GHZ]; 192 193 hw->wiphy->hw_version = priv->trans->hw_id; 194 195 iwl_leds_init(priv); 196 197 wiphy_ext_feature_set(hw->wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST); 198 wiphy_ext_feature_set(hw->wiphy, NL80211_EXT_FEATURE_EXT_KEY_ID); 199 200 ret = ieee80211_register_hw(priv->hw); 201 if (ret) { 202 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret); 203 iwl_leds_exit(priv); 204 return ret; 205 } 206 priv->mac80211_registered = 1; 207 208 return 0; 209 } 210 211 void iwlagn_mac_unregister(struct iwl_priv *priv) 212 { 213 if (!priv->mac80211_registered) 214 return; 215 iwl_leds_exit(priv); 216 ieee80211_unregister_hw(priv->hw); 217 priv->mac80211_registered = 0; 218 } 219 220 static int __iwl_up(struct iwl_priv *priv) 221 { 222 struct iwl_rxon_context *ctx; 223 int ret; 224 225 lockdep_assert_held(&priv->mutex); 226 227 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) { 228 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n"); 229 return -EIO; 230 } 231 232 for_each_context(priv, ctx) { 233 ret = iwlagn_alloc_bcast_station(priv, ctx); 234 if (ret) { 235 iwl_dealloc_bcast_stations(priv); 236 return ret; 237 } 238 } 239 240 ret = iwl_trans_start_hw(priv->trans); 241 if (ret) { 242 IWL_ERR(priv, "Failed to start HW: %d\n", ret); 243 goto error; 244 } 245 246 ret = iwl_run_init_ucode(priv); 247 if (ret) { 248 IWL_ERR(priv, "Failed to run INIT ucode: %d\n", ret); 249 goto error; 250 } 251 252 ret = iwl_trans_start_hw(priv->trans); 253 if (ret) { 254 IWL_ERR(priv, "Failed to start HW: %d\n", ret); 255 goto error; 256 } 257 258 ret = iwl_load_ucode_wait_alive(priv, IWL_UCODE_REGULAR); 259 if (ret) { 260 IWL_ERR(priv, "Failed to start RT ucode: %d\n", ret); 261 goto error; 262 } 263 264 ret = iwl_alive_start(priv); 265 if (ret) 266 goto error; 267 return 0; 268 269 error: 270 set_bit(STATUS_EXIT_PENDING, &priv->status); 271 iwl_down(priv); 272 clear_bit(STATUS_EXIT_PENDING, &priv->status); 273 274 IWL_ERR(priv, "Unable to initialize device.\n"); 275 return ret; 276 } 277 278 static int iwlagn_mac_start(struct ieee80211_hw *hw) 279 { 280 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 281 int ret; 282 283 IWL_DEBUG_MAC80211(priv, "enter\n"); 284 285 /* we should be verifying the device is ready to be opened */ 286 mutex_lock(&priv->mutex); 287 ret = __iwl_up(priv); 288 mutex_unlock(&priv->mutex); 289 if (ret) 290 return ret; 291 292 IWL_DEBUG_INFO(priv, "Start UP work done.\n"); 293 294 /* Now we should be done, and the READY bit should be set. */ 295 if (WARN_ON(!test_bit(STATUS_READY, &priv->status))) 296 ret = -EIO; 297 298 iwlagn_led_enable(priv); 299 300 priv->is_open = 1; 301 IWL_DEBUG_MAC80211(priv, "leave\n"); 302 return ret; 303 } 304 305 static void iwlagn_mac_stop(struct ieee80211_hw *hw) 306 { 307 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 308 309 IWL_DEBUG_MAC80211(priv, "enter\n"); 310 311 if (!priv->is_open) 312 return; 313 314 priv->is_open = 0; 315 316 mutex_lock(&priv->mutex); 317 iwl_down(priv); 318 mutex_unlock(&priv->mutex); 319 320 iwl_cancel_deferred_work(priv); 321 322 flush_workqueue(priv->workqueue); 323 324 IWL_DEBUG_MAC80211(priv, "leave\n"); 325 } 326 327 static void iwlagn_mac_set_rekey_data(struct ieee80211_hw *hw, 328 struct ieee80211_vif *vif, 329 struct cfg80211_gtk_rekey_data *data) 330 { 331 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 332 333 if (iwlwifi_mod_params.swcrypto) 334 return; 335 336 IWL_DEBUG_MAC80211(priv, "enter\n"); 337 mutex_lock(&priv->mutex); 338 339 if (priv->contexts[IWL_RXON_CTX_BSS].vif != vif) 340 goto out; 341 342 memcpy(priv->kek, data->kek, NL80211_KEK_LEN); 343 memcpy(priv->kck, data->kck, NL80211_KCK_LEN); 344 priv->replay_ctr = 345 cpu_to_le64(be64_to_cpup((__be64 *)&data->replay_ctr)); 346 priv->have_rekey_data = true; 347 348 out: 349 mutex_unlock(&priv->mutex); 350 IWL_DEBUG_MAC80211(priv, "leave\n"); 351 } 352 353 #ifdef CONFIG_PM_SLEEP 354 355 static int iwlagn_mac_suspend(struct ieee80211_hw *hw, 356 struct cfg80211_wowlan *wowlan) 357 { 358 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 359 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS]; 360 int ret; 361 362 if (WARN_ON(!wowlan)) 363 return -EINVAL; 364 365 IWL_DEBUG_MAC80211(priv, "enter\n"); 366 mutex_lock(&priv->mutex); 367 368 /* Don't attempt WoWLAN when not associated, tear down instead. */ 369 if (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION || 370 !iwl_is_associated_ctx(ctx)) { 371 ret = 1; 372 goto out; 373 } 374 375 ret = iwlagn_suspend(priv, wowlan); 376 if (ret) 377 goto error; 378 379 /* let the ucode operate on its own */ 380 iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_SET, 381 CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE); 382 383 iwl_trans_d3_suspend(priv->trans, false, true); 384 385 goto out; 386 387 error: 388 priv->wowlan = false; 389 iwlagn_prepare_restart(priv); 390 ieee80211_restart_hw(priv->hw); 391 out: 392 mutex_unlock(&priv->mutex); 393 IWL_DEBUG_MAC80211(priv, "leave\n"); 394 395 return ret; 396 } 397 398 struct iwl_resume_data { 399 struct iwl_priv *priv; 400 struct iwlagn_wowlan_status *cmd; 401 bool valid; 402 }; 403 404 static bool iwl_resume_status_fn(struct iwl_notif_wait_data *notif_wait, 405 struct iwl_rx_packet *pkt, void *data) 406 { 407 struct iwl_resume_data *resume_data = data; 408 struct iwl_priv *priv = resume_data->priv; 409 410 if (iwl_rx_packet_payload_len(pkt) != sizeof(*resume_data->cmd)) { 411 IWL_ERR(priv, "rx wrong size data\n"); 412 return true; 413 } 414 memcpy(resume_data->cmd, pkt->data, sizeof(*resume_data->cmd)); 415 resume_data->valid = true; 416 417 return true; 418 } 419 420 static int iwlagn_mac_resume(struct ieee80211_hw *hw) 421 { 422 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 423 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS]; 424 struct ieee80211_vif *vif; 425 u32 base; 426 int ret; 427 enum iwl_d3_status d3_status; 428 struct error_table_start { 429 /* cf. struct iwl_error_event_table */ 430 u32 valid; 431 u32 error_id; 432 } err_info; 433 struct iwl_notification_wait status_wait; 434 static const u16 status_cmd[] = { 435 REPLY_WOWLAN_GET_STATUS, 436 }; 437 struct iwlagn_wowlan_status status_data = {}; 438 struct iwl_resume_data resume_data = { 439 .priv = priv, 440 .cmd = &status_data, 441 .valid = false, 442 }; 443 struct cfg80211_wowlan_wakeup wakeup = { 444 .pattern_idx = -1, 445 }; 446 #ifdef CONFIG_IWLWIFI_DEBUGFS 447 const struct fw_img *img; 448 #endif 449 450 IWL_DEBUG_MAC80211(priv, "enter\n"); 451 mutex_lock(&priv->mutex); 452 453 /* we'll clear ctx->vif during iwlagn_prepare_restart() */ 454 vif = ctx->vif; 455 456 ret = iwl_trans_d3_resume(priv->trans, &d3_status, false, true); 457 if (ret) 458 goto out_unlock; 459 460 if (d3_status != IWL_D3_STATUS_ALIVE) { 461 IWL_INFO(priv, "Device was reset during suspend\n"); 462 goto out_unlock; 463 } 464 465 /* uCode is no longer operating by itself */ 466 iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_CLR, 467 CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE); 468 469 base = priv->device_pointers.error_event_table; 470 if (!iwlagn_hw_valid_rtc_data_addr(base)) { 471 IWL_WARN(priv, "Invalid error table during resume!\n"); 472 goto out_unlock; 473 } 474 475 iwl_trans_read_mem_bytes(priv->trans, base, 476 &err_info, sizeof(err_info)); 477 478 if (err_info.valid) { 479 IWL_INFO(priv, "error table is valid (%d, 0x%x)\n", 480 err_info.valid, err_info.error_id); 481 if (err_info.error_id == RF_KILL_INDICATOR_FOR_WOWLAN) { 482 wakeup.rfkill_release = true; 483 ieee80211_report_wowlan_wakeup(vif, &wakeup, 484 GFP_KERNEL); 485 } 486 goto out_unlock; 487 } 488 489 #ifdef CONFIG_IWLWIFI_DEBUGFS 490 img = &priv->fw->img[IWL_UCODE_WOWLAN]; 491 if (!priv->wowlan_sram) 492 priv->wowlan_sram = 493 kzalloc(img->sec[IWL_UCODE_SECTION_DATA].len, 494 GFP_KERNEL); 495 496 if (priv->wowlan_sram) 497 iwl_trans_read_mem(priv->trans, 0x800000, 498 priv->wowlan_sram, 499 img->sec[IWL_UCODE_SECTION_DATA].len / 4); 500 #endif 501 502 /* 503 * This is very strange. The GET_STATUS command is sent but the device 504 * doesn't reply properly, it seems it doesn't close the RBD so one is 505 * always left open ... As a result, we need to send another command 506 * and have to reset the driver afterwards. As we need to switch to 507 * runtime firmware again that'll happen. 508 */ 509 510 iwl_init_notification_wait(&priv->notif_wait, &status_wait, status_cmd, 511 ARRAY_SIZE(status_cmd), iwl_resume_status_fn, 512 &resume_data); 513 514 iwl_dvm_send_cmd_pdu(priv, REPLY_WOWLAN_GET_STATUS, CMD_ASYNC, 0, NULL); 515 iwl_dvm_send_cmd_pdu(priv, REPLY_ECHO, CMD_ASYNC, 0, NULL); 516 /* an RBD is left open in the firmware now! */ 517 518 ret = iwl_wait_notification(&priv->notif_wait, &status_wait, HZ/5); 519 if (ret) 520 goto out_unlock; 521 522 if (resume_data.valid && priv->contexts[IWL_RXON_CTX_BSS].vif) { 523 u32 reasons = le32_to_cpu(status_data.wakeup_reason); 524 struct cfg80211_wowlan_wakeup *wakeup_report; 525 526 IWL_INFO(priv, "WoWLAN wakeup reason(s): 0x%.8x\n", reasons); 527 528 if (reasons) { 529 if (reasons & IWLAGN_WOWLAN_WAKEUP_MAGIC_PACKET) 530 wakeup.magic_pkt = true; 531 if (reasons & IWLAGN_WOWLAN_WAKEUP_PATTERN_MATCH) 532 wakeup.pattern_idx = status_data.pattern_number; 533 if (reasons & (IWLAGN_WOWLAN_WAKEUP_BEACON_MISS | 534 IWLAGN_WOWLAN_WAKEUP_LINK_CHANGE)) 535 wakeup.disconnect = true; 536 if (reasons & IWLAGN_WOWLAN_WAKEUP_GTK_REKEY_FAIL) 537 wakeup.gtk_rekey_failure = true; 538 if (reasons & IWLAGN_WOWLAN_WAKEUP_EAP_IDENT_REQ) 539 wakeup.eap_identity_req = true; 540 if (reasons & IWLAGN_WOWLAN_WAKEUP_4WAY_HANDSHAKE) 541 wakeup.four_way_handshake = true; 542 wakeup_report = &wakeup; 543 } else { 544 wakeup_report = NULL; 545 } 546 547 ieee80211_report_wowlan_wakeup(vif, wakeup_report, GFP_KERNEL); 548 } 549 550 priv->wowlan = false; 551 552 iwlagn_prepare_restart(priv); 553 554 memset((void *)&ctx->active, 0, sizeof(ctx->active)); 555 iwl_connection_init_rx_config(priv, ctx); 556 iwlagn_set_rxon_chain(priv, ctx); 557 558 out_unlock: 559 mutex_unlock(&priv->mutex); 560 IWL_DEBUG_MAC80211(priv, "leave\n"); 561 562 ieee80211_resume_disconnect(vif); 563 564 return 1; 565 } 566 567 static void iwlagn_mac_set_wakeup(struct ieee80211_hw *hw, bool enabled) 568 { 569 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 570 571 device_set_wakeup_enable(priv->trans->dev, enabled); 572 } 573 #endif 574 575 static void iwlagn_mac_tx(struct ieee80211_hw *hw, 576 struct ieee80211_tx_control *control, 577 struct sk_buff *skb) 578 { 579 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 580 581 if (iwlagn_tx_skb(priv, control->sta, skb)) 582 ieee80211_free_txskb(hw, skb); 583 } 584 585 static void iwlagn_mac_update_tkip_key(struct ieee80211_hw *hw, 586 struct ieee80211_vif *vif, 587 struct ieee80211_key_conf *keyconf, 588 struct ieee80211_sta *sta, 589 u32 iv32, u16 *phase1key) 590 { 591 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 592 593 iwl_update_tkip_key(priv, vif, keyconf, sta, iv32, phase1key); 594 } 595 596 static int iwlagn_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd, 597 struct ieee80211_vif *vif, 598 struct ieee80211_sta *sta, 599 struct ieee80211_key_conf *key) 600 { 601 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 602 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv; 603 struct iwl_rxon_context *ctx = vif_priv->ctx; 604 int ret; 605 bool is_default_wep_key = false; 606 607 IWL_DEBUG_MAC80211(priv, "enter\n"); 608 609 if (iwlwifi_mod_params.swcrypto) { 610 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n"); 611 return -EOPNOTSUPP; 612 } 613 614 switch (key->cipher) { 615 case WLAN_CIPHER_SUITE_TKIP: 616 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC; 617 fallthrough; 618 case WLAN_CIPHER_SUITE_CCMP: 619 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV; 620 break; 621 default: 622 break; 623 } 624 625 /* 626 * We could program these keys into the hardware as well, but we 627 * don't expect much multicast traffic in IBSS and having keys 628 * for more stations is probably more useful. 629 * 630 * Mark key TX-only and return 0. 631 */ 632 if (vif->type == NL80211_IFTYPE_ADHOC && 633 !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) { 634 key->hw_key_idx = WEP_INVALID_OFFSET; 635 return 0; 636 } 637 638 /* If they key was TX-only, accept deletion */ 639 if (cmd == DISABLE_KEY && key->hw_key_idx == WEP_INVALID_OFFSET) 640 return 0; 641 642 mutex_lock(&priv->mutex); 643 iwl_scan_cancel_timeout(priv, 100); 644 645 BUILD_BUG_ON(WEP_INVALID_OFFSET == IWLAGN_HW_KEY_DEFAULT); 646 647 /* 648 * If we are getting WEP group key and we didn't receive any key mapping 649 * so far, we are in legacy wep mode (group key only), otherwise we are 650 * in 1X mode. 651 * In legacy wep mode, we use another host command to the uCode. 652 */ 653 if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 || 654 key->cipher == WLAN_CIPHER_SUITE_WEP104) && !sta) { 655 if (cmd == SET_KEY) 656 is_default_wep_key = !ctx->key_mapping_keys; 657 else 658 is_default_wep_key = 659 key->hw_key_idx == IWLAGN_HW_KEY_DEFAULT; 660 } 661 662 663 switch (cmd) { 664 case SET_KEY: 665 if (is_default_wep_key) { 666 ret = iwl_set_default_wep_key(priv, vif_priv->ctx, key); 667 break; 668 } 669 ret = iwl_set_dynamic_key(priv, vif_priv->ctx, key, sta); 670 if (ret) { 671 /* 672 * can't add key for RX, but we don't need it 673 * in the device for TX so still return 0 674 */ 675 ret = 0; 676 key->hw_key_idx = WEP_INVALID_OFFSET; 677 } 678 679 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n"); 680 break; 681 case DISABLE_KEY: 682 if (is_default_wep_key) 683 ret = iwl_remove_default_wep_key(priv, ctx, key); 684 else 685 ret = iwl_remove_dynamic_key(priv, ctx, key, sta); 686 687 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n"); 688 break; 689 default: 690 ret = -EINVAL; 691 } 692 693 mutex_unlock(&priv->mutex); 694 IWL_DEBUG_MAC80211(priv, "leave\n"); 695 696 return ret; 697 } 698 699 static int iwlagn_mac_ampdu_action(struct ieee80211_hw *hw, 700 struct ieee80211_vif *vif, 701 struct ieee80211_ampdu_params *params) 702 { 703 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 704 int ret = -EINVAL; 705 struct ieee80211_sta *sta = params->sta; 706 enum ieee80211_ampdu_mlme_action action = params->action; 707 u16 tid = params->tid; 708 u16 *ssn = ¶ms->ssn; 709 u8 buf_size = params->buf_size; 710 struct iwl_station_priv *sta_priv = (void *) sta->drv_priv; 711 712 IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n", 713 sta->addr, tid); 714 715 if (!(priv->nvm_data->sku_cap_11n_enable)) 716 return -EACCES; 717 718 IWL_DEBUG_MAC80211(priv, "enter\n"); 719 mutex_lock(&priv->mutex); 720 721 switch (action) { 722 case IEEE80211_AMPDU_RX_START: 723 if (!iwl_enable_rx_ampdu()) 724 break; 725 IWL_DEBUG_HT(priv, "start Rx\n"); 726 ret = iwl_sta_rx_agg_start(priv, sta, tid, *ssn); 727 break; 728 case IEEE80211_AMPDU_RX_STOP: 729 IWL_DEBUG_HT(priv, "stop Rx\n"); 730 ret = iwl_sta_rx_agg_stop(priv, sta, tid); 731 break; 732 case IEEE80211_AMPDU_TX_START: 733 if (!priv->trans->ops->txq_enable) 734 break; 735 if (!iwl_enable_tx_ampdu()) 736 break; 737 IWL_DEBUG_HT(priv, "start Tx\n"); 738 ret = iwlagn_tx_agg_start(priv, vif, sta, tid, ssn); 739 break; 740 case IEEE80211_AMPDU_TX_STOP_FLUSH: 741 case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT: 742 IWL_DEBUG_HT(priv, "Flush Tx\n"); 743 ret = iwlagn_tx_agg_flush(priv, vif, sta, tid); 744 break; 745 case IEEE80211_AMPDU_TX_STOP_CONT: 746 IWL_DEBUG_HT(priv, "stop Tx\n"); 747 ret = iwlagn_tx_agg_stop(priv, vif, sta, tid); 748 if ((ret == 0) && (priv->agg_tids_count > 0)) { 749 priv->agg_tids_count--; 750 IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n", 751 priv->agg_tids_count); 752 } 753 if (!priv->agg_tids_count && 754 priv->hw_params.use_rts_for_aggregation) { 755 /* 756 * switch off RTS/CTS if it was previously enabled 757 */ 758 sta_priv->lq_sta.lq.general_params.flags &= 759 ~LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK; 760 iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif), 761 &sta_priv->lq_sta.lq, CMD_ASYNC, false); 762 } 763 break; 764 case IEEE80211_AMPDU_TX_OPERATIONAL: 765 ret = iwlagn_tx_agg_oper(priv, vif, sta, tid, buf_size); 766 break; 767 } 768 mutex_unlock(&priv->mutex); 769 IWL_DEBUG_MAC80211(priv, "leave\n"); 770 return ret; 771 } 772 773 static int iwlagn_mac_sta_add(struct ieee80211_hw *hw, 774 struct ieee80211_vif *vif, 775 struct ieee80211_sta *sta) 776 { 777 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 778 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv; 779 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv; 780 bool is_ap = vif->type == NL80211_IFTYPE_STATION; 781 int ret; 782 u8 sta_id; 783 784 IWL_DEBUG_INFO(priv, "proceeding to add station %pM\n", 785 sta->addr); 786 sta_priv->sta_id = IWL_INVALID_STATION; 787 788 atomic_set(&sta_priv->pending_frames, 0); 789 if (vif->type == NL80211_IFTYPE_AP) 790 sta_priv->client = true; 791 792 ret = iwl_add_station_common(priv, vif_priv->ctx, sta->addr, 793 is_ap, sta, &sta_id); 794 if (ret) { 795 IWL_ERR(priv, "Unable to add station %pM (%d)\n", 796 sta->addr, ret); 797 /* Should we return success if return code is EEXIST ? */ 798 return ret; 799 } 800 801 sta_priv->sta_id = sta_id; 802 803 return 0; 804 } 805 806 static int iwlagn_mac_sta_remove(struct ieee80211_hw *hw, 807 struct ieee80211_vif *vif, 808 struct ieee80211_sta *sta) 809 { 810 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 811 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv; 812 int ret; 813 814 IWL_DEBUG_INFO(priv, "proceeding to remove station %pM\n", sta->addr); 815 816 if (vif->type == NL80211_IFTYPE_STATION) { 817 /* 818 * Station will be removed from device when the RXON 819 * is set to unassociated -- just deactivate it here 820 * to avoid re-programming it. 821 */ 822 ret = 0; 823 iwl_deactivate_station(priv, sta_priv->sta_id, sta->addr); 824 } else { 825 ret = iwl_remove_station(priv, sta_priv->sta_id, sta->addr); 826 if (ret) 827 IWL_DEBUG_QUIET_RFKILL(priv, 828 "Error removing station %pM\n", sta->addr); 829 } 830 return ret; 831 } 832 833 static int iwlagn_mac_sta_state(struct ieee80211_hw *hw, 834 struct ieee80211_vif *vif, 835 struct ieee80211_sta *sta, 836 enum ieee80211_sta_state old_state, 837 enum ieee80211_sta_state new_state) 838 { 839 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 840 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv; 841 enum { 842 NONE, ADD, REMOVE, HT_RATE_INIT, ADD_RATE_INIT, 843 } op = NONE; 844 int ret; 845 846 IWL_DEBUG_MAC80211(priv, "station %pM state change %d->%d\n", 847 sta->addr, old_state, new_state); 848 849 mutex_lock(&priv->mutex); 850 if (vif->type == NL80211_IFTYPE_STATION) { 851 if (old_state == IEEE80211_STA_NOTEXIST && 852 new_state == IEEE80211_STA_NONE) 853 op = ADD; 854 else if (old_state == IEEE80211_STA_NONE && 855 new_state == IEEE80211_STA_NOTEXIST) 856 op = REMOVE; 857 else if (old_state == IEEE80211_STA_AUTH && 858 new_state == IEEE80211_STA_ASSOC) 859 op = HT_RATE_INIT; 860 } else { 861 if (old_state == IEEE80211_STA_AUTH && 862 new_state == IEEE80211_STA_ASSOC) 863 op = ADD_RATE_INIT; 864 else if (old_state == IEEE80211_STA_ASSOC && 865 new_state == IEEE80211_STA_AUTH) 866 op = REMOVE; 867 } 868 869 switch (op) { 870 case ADD: 871 ret = iwlagn_mac_sta_add(hw, vif, sta); 872 if (ret) 873 break; 874 /* 875 * Clear the in-progress flag, the AP station entry was added 876 * but we'll initialize LQ only when we've associated (which 877 * would also clear the in-progress flag). This is necessary 878 * in case we never initialize LQ because association fails. 879 */ 880 spin_lock_bh(&priv->sta_lock); 881 priv->stations[iwl_sta_id(sta)].used &= 882 ~IWL_STA_UCODE_INPROGRESS; 883 spin_unlock_bh(&priv->sta_lock); 884 break; 885 case REMOVE: 886 ret = iwlagn_mac_sta_remove(hw, vif, sta); 887 break; 888 case ADD_RATE_INIT: 889 ret = iwlagn_mac_sta_add(hw, vif, sta); 890 if (ret) 891 break; 892 /* Initialize rate scaling */ 893 IWL_DEBUG_INFO(priv, 894 "Initializing rate scaling for station %pM\n", 895 sta->addr); 896 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta)); 897 ret = 0; 898 break; 899 case HT_RATE_INIT: 900 /* Initialize rate scaling */ 901 ret = iwl_sta_update_ht(priv, vif_priv->ctx, sta); 902 if (ret) 903 break; 904 IWL_DEBUG_INFO(priv, 905 "Initializing rate scaling for station %pM\n", 906 sta->addr); 907 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta)); 908 ret = 0; 909 break; 910 default: 911 ret = 0; 912 break; 913 } 914 915 /* 916 * mac80211 might WARN if we fail, but due the way we 917 * (badly) handle hard rfkill, we might fail here 918 */ 919 if (iwl_is_rfkill(priv)) 920 ret = 0; 921 922 mutex_unlock(&priv->mutex); 923 IWL_DEBUG_MAC80211(priv, "leave\n"); 924 925 return ret; 926 } 927 928 static void iwlagn_mac_channel_switch(struct ieee80211_hw *hw, 929 struct ieee80211_vif *vif, 930 struct ieee80211_channel_switch *ch_switch) 931 { 932 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 933 struct ieee80211_conf *conf = &hw->conf; 934 struct ieee80211_channel *channel = ch_switch->chandef.chan; 935 struct iwl_ht_config *ht_conf = &priv->current_ht_config; 936 /* 937 * MULTI-FIXME 938 * When we add support for multiple interfaces, we need to 939 * revisit this. The channel switch command in the device 940 * only affects the BSS context, but what does that really 941 * mean? And what if we get a CSA on the second interface? 942 * This needs a lot of work. 943 */ 944 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS]; 945 u16 ch; 946 947 IWL_DEBUG_MAC80211(priv, "enter\n"); 948 949 mutex_lock(&priv->mutex); 950 951 if (iwl_is_rfkill(priv)) 952 goto out; 953 954 if (test_bit(STATUS_EXIT_PENDING, &priv->status) || 955 test_bit(STATUS_SCANNING, &priv->status) || 956 test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status)) 957 goto out; 958 959 if (!iwl_is_associated_ctx(ctx)) 960 goto out; 961 962 if (!priv->lib->set_channel_switch) 963 goto out; 964 965 ch = channel->hw_value; 966 if (le16_to_cpu(ctx->active.channel) == ch) 967 goto out; 968 969 priv->current_ht_config.smps = conf->smps_mode; 970 971 /* Configure HT40 channels */ 972 switch (cfg80211_get_chandef_type(&ch_switch->chandef)) { 973 case NL80211_CHAN_NO_HT: 974 case NL80211_CHAN_HT20: 975 ctx->ht.is_40mhz = false; 976 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE; 977 break; 978 case NL80211_CHAN_HT40MINUS: 979 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_BELOW; 980 ctx->ht.is_40mhz = true; 981 break; 982 case NL80211_CHAN_HT40PLUS: 983 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_ABOVE; 984 ctx->ht.is_40mhz = true; 985 break; 986 } 987 988 if ((le16_to_cpu(ctx->staging.channel) != ch)) 989 ctx->staging.flags = 0; 990 991 iwl_set_rxon_channel(priv, channel, ctx); 992 iwl_set_rxon_ht(priv, ht_conf); 993 iwl_set_flags_for_band(priv, ctx, channel->band, ctx->vif); 994 995 /* 996 * at this point, staging_rxon has the 997 * configuration for channel switch 998 */ 999 set_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status); 1000 priv->switch_channel = cpu_to_le16(ch); 1001 if (priv->lib->set_channel_switch(priv, ch_switch)) { 1002 clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status); 1003 priv->switch_channel = 0; 1004 ieee80211_chswitch_done(ctx->vif, false, 0); 1005 } 1006 1007 out: 1008 mutex_unlock(&priv->mutex); 1009 IWL_DEBUG_MAC80211(priv, "leave\n"); 1010 } 1011 1012 void iwl_chswitch_done(struct iwl_priv *priv, bool is_success) 1013 { 1014 /* 1015 * MULTI-FIXME 1016 * See iwlagn_mac_channel_switch. 1017 */ 1018 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS]; 1019 1020 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) 1021 return; 1022 1023 if (!test_and_clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status)) 1024 return; 1025 1026 if (ctx->vif) 1027 ieee80211_chswitch_done(ctx->vif, is_success, 0); 1028 } 1029 1030 static void iwlagn_configure_filter(struct ieee80211_hw *hw, 1031 unsigned int changed_flags, 1032 unsigned int *total_flags, 1033 u64 multicast) 1034 { 1035 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1036 __le32 filter_or = 0, filter_nand = 0; 1037 struct iwl_rxon_context *ctx; 1038 1039 #define CHK(test, flag) do { \ 1040 if (*total_flags & (test)) \ 1041 filter_or |= (flag); \ 1042 else \ 1043 filter_nand |= (flag); \ 1044 } while (0) 1045 1046 IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n", 1047 changed_flags, *total_flags); 1048 1049 CHK(FIF_OTHER_BSS, RXON_FILTER_PROMISC_MSK); 1050 /* Setting _just_ RXON_FILTER_CTL2HOST_MSK causes FH errors */ 1051 CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_PROMISC_MSK); 1052 CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK); 1053 1054 #undef CHK 1055 1056 mutex_lock(&priv->mutex); 1057 1058 for_each_context(priv, ctx) { 1059 ctx->staging.filter_flags &= ~filter_nand; 1060 ctx->staging.filter_flags |= filter_or; 1061 1062 /* 1063 * Not committing directly because hardware can perform a scan, 1064 * but we'll eventually commit the filter flags change anyway. 1065 */ 1066 } 1067 1068 mutex_unlock(&priv->mutex); 1069 1070 /* 1071 * Receiving all multicast frames is always enabled by the 1072 * default flags setup in iwl_connection_init_rx_config() 1073 * since we currently do not support programming multicast 1074 * filters into the device. 1075 */ 1076 *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | 1077 FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL; 1078 } 1079 1080 static void iwlagn_mac_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 1081 u32 queues, bool drop) 1082 { 1083 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1084 u32 scd_queues; 1085 1086 mutex_lock(&priv->mutex); 1087 IWL_DEBUG_MAC80211(priv, "enter\n"); 1088 1089 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) { 1090 IWL_DEBUG_TX(priv, "Aborting flush due to device shutdown\n"); 1091 goto done; 1092 } 1093 if (iwl_is_rfkill(priv)) { 1094 IWL_DEBUG_TX(priv, "Aborting flush due to RF Kill\n"); 1095 goto done; 1096 } 1097 1098 scd_queues = BIT(priv->trans->trans_cfg->base_params->num_of_queues) - 1; 1099 scd_queues &= ~(BIT(IWL_IPAN_CMD_QUEUE_NUM) | 1100 BIT(IWL_DEFAULT_CMD_QUEUE_NUM)); 1101 1102 if (drop) { 1103 IWL_DEBUG_TX_QUEUES(priv, "Flushing SCD queues: 0x%x\n", 1104 scd_queues); 1105 if (iwlagn_txfifo_flush(priv, scd_queues)) { 1106 IWL_ERR(priv, "flush request fail\n"); 1107 goto done; 1108 } 1109 } 1110 1111 IWL_DEBUG_TX_QUEUES(priv, "wait transmit/flush all frames\n"); 1112 iwl_trans_wait_tx_queues_empty(priv->trans, scd_queues); 1113 done: 1114 mutex_unlock(&priv->mutex); 1115 IWL_DEBUG_MAC80211(priv, "leave\n"); 1116 } 1117 1118 static void iwlagn_mac_event_callback(struct ieee80211_hw *hw, 1119 struct ieee80211_vif *vif, 1120 const struct ieee80211_event *event) 1121 { 1122 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1123 1124 if (event->type != RSSI_EVENT) 1125 return; 1126 1127 IWL_DEBUG_MAC80211(priv, "enter\n"); 1128 1129 if (priv->lib->bt_params && 1130 priv->lib->bt_params->advanced_bt_coexist) { 1131 if (event->u.rssi.data == RSSI_EVENT_LOW) 1132 priv->bt_enable_pspoll = true; 1133 else if (event->u.rssi.data == RSSI_EVENT_HIGH) 1134 priv->bt_enable_pspoll = false; 1135 1136 queue_work(priv->workqueue, &priv->bt_runtime_config); 1137 } else { 1138 IWL_DEBUG_MAC80211(priv, "Advanced BT coex disabled," 1139 "ignoring RSSI callback\n"); 1140 } 1141 1142 IWL_DEBUG_MAC80211(priv, "leave\n"); 1143 } 1144 1145 static int iwlagn_mac_set_tim(struct ieee80211_hw *hw, 1146 struct ieee80211_sta *sta, bool set) 1147 { 1148 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1149 1150 queue_work(priv->workqueue, &priv->beacon_update); 1151 1152 return 0; 1153 } 1154 1155 static int iwlagn_mac_conf_tx(struct ieee80211_hw *hw, 1156 struct ieee80211_vif *vif, 1157 unsigned int link_id, u16 queue, 1158 const struct ieee80211_tx_queue_params *params) 1159 { 1160 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1161 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv; 1162 struct iwl_rxon_context *ctx = vif_priv->ctx; 1163 int q; 1164 1165 if (WARN_ON(!ctx)) 1166 return -EINVAL; 1167 1168 IWL_DEBUG_MAC80211(priv, "enter\n"); 1169 1170 if (!iwl_is_ready_rf(priv)) { 1171 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n"); 1172 return -EIO; 1173 } 1174 1175 if (queue >= AC_NUM) { 1176 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue); 1177 return 0; 1178 } 1179 1180 q = AC_NUM - 1 - queue; 1181 1182 mutex_lock(&priv->mutex); 1183 1184 ctx->qos_data.def_qos_parm.ac[q].cw_min = 1185 cpu_to_le16(params->cw_min); 1186 ctx->qos_data.def_qos_parm.ac[q].cw_max = 1187 cpu_to_le16(params->cw_max); 1188 ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs; 1189 ctx->qos_data.def_qos_parm.ac[q].edca_txop = 1190 cpu_to_le16((params->txop * 32)); 1191 1192 ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0; 1193 1194 mutex_unlock(&priv->mutex); 1195 1196 IWL_DEBUG_MAC80211(priv, "leave\n"); 1197 return 0; 1198 } 1199 1200 static int iwlagn_mac_tx_last_beacon(struct ieee80211_hw *hw) 1201 { 1202 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1203 1204 return priv->ibss_manager == IWL_IBSS_MANAGER; 1205 } 1206 1207 static int iwl_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx) 1208 { 1209 iwl_connection_init_rx_config(priv, ctx); 1210 1211 iwlagn_set_rxon_chain(priv, ctx); 1212 1213 return iwlagn_commit_rxon(priv, ctx); 1214 } 1215 1216 static int iwl_setup_interface(struct iwl_priv *priv, 1217 struct iwl_rxon_context *ctx) 1218 { 1219 struct ieee80211_vif *vif = ctx->vif; 1220 int err, ac; 1221 1222 lockdep_assert_held(&priv->mutex); 1223 1224 /* 1225 * This variable will be correct only when there's just 1226 * a single context, but all code using it is for hardware 1227 * that supports only one context. 1228 */ 1229 priv->iw_mode = vif->type; 1230 1231 ctx->is_active = true; 1232 1233 err = iwl_set_mode(priv, ctx); 1234 if (err) { 1235 if (!ctx->always_active) 1236 ctx->is_active = false; 1237 return err; 1238 } 1239 1240 if (priv->lib->bt_params && priv->lib->bt_params->advanced_bt_coexist && 1241 vif->type == NL80211_IFTYPE_ADHOC) { 1242 /* 1243 * pretend to have high BT traffic as long as we 1244 * are operating in IBSS mode, as this will cause 1245 * the rate scaling etc. to behave as intended. 1246 */ 1247 priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH; 1248 } 1249 1250 /* set up queue mappings */ 1251 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 1252 vif->hw_queue[ac] = ctx->ac_to_queue[ac]; 1253 1254 if (vif->type == NL80211_IFTYPE_AP) 1255 vif->cab_queue = ctx->mcast_queue; 1256 else 1257 vif->cab_queue = IEEE80211_INVAL_HW_QUEUE; 1258 1259 return 0; 1260 } 1261 1262 static int iwlagn_mac_add_interface(struct ieee80211_hw *hw, 1263 struct ieee80211_vif *vif) 1264 { 1265 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1266 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv; 1267 struct iwl_rxon_context *tmp, *ctx = NULL; 1268 int err; 1269 enum nl80211_iftype viftype = ieee80211_vif_type_p2p(vif); 1270 bool reset = false; 1271 1272 IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n", 1273 viftype, vif->addr); 1274 1275 mutex_lock(&priv->mutex); 1276 1277 if (!iwl_is_ready_rf(priv)) { 1278 IWL_WARN(priv, "Try to add interface when device not ready\n"); 1279 err = -EINVAL; 1280 goto out; 1281 } 1282 1283 for_each_context(priv, tmp) { 1284 u32 possible_modes = 1285 tmp->interface_modes | tmp->exclusive_interface_modes; 1286 1287 if (tmp->vif) { 1288 /* On reset we need to add the same interface again */ 1289 if (tmp->vif == vif) { 1290 reset = true; 1291 ctx = tmp; 1292 break; 1293 } 1294 1295 /* check if this busy context is exclusive */ 1296 if (tmp->exclusive_interface_modes & 1297 BIT(tmp->vif->type)) { 1298 err = -EINVAL; 1299 goto out; 1300 } 1301 continue; 1302 } 1303 1304 if (!(possible_modes & BIT(viftype))) 1305 continue; 1306 1307 /* have maybe usable context w/o interface */ 1308 ctx = tmp; 1309 break; 1310 } 1311 1312 if (!ctx) { 1313 err = -EOPNOTSUPP; 1314 goto out; 1315 } 1316 1317 vif_priv->ctx = ctx; 1318 ctx->vif = vif; 1319 1320 /* 1321 * In SNIFFER device type, the firmware reports the FCS to 1322 * the host, rather than snipping it off. Unfortunately, 1323 * mac80211 doesn't (yet) provide a per-packet flag for 1324 * this, so that we have to set the hardware flag based 1325 * on the interfaces added. As the monitor interface can 1326 * only be present by itself, and will be removed before 1327 * other interfaces are added, this is safe. 1328 */ 1329 if (vif->type == NL80211_IFTYPE_MONITOR) 1330 ieee80211_hw_set(priv->hw, RX_INCLUDES_FCS); 1331 else 1332 __clear_bit(IEEE80211_HW_RX_INCLUDES_FCS, priv->hw->flags); 1333 1334 err = iwl_setup_interface(priv, ctx); 1335 if (!err || reset) 1336 goto out; 1337 1338 ctx->vif = NULL; 1339 priv->iw_mode = NL80211_IFTYPE_STATION; 1340 out: 1341 mutex_unlock(&priv->mutex); 1342 1343 IWL_DEBUG_MAC80211(priv, "leave\n"); 1344 return err; 1345 } 1346 1347 static void iwl_teardown_interface(struct iwl_priv *priv, 1348 struct ieee80211_vif *vif, 1349 bool mode_change) 1350 { 1351 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif); 1352 1353 lockdep_assert_held(&priv->mutex); 1354 1355 if (priv->scan_vif == vif) { 1356 iwl_scan_cancel_timeout(priv, 200); 1357 iwl_force_scan_end(priv); 1358 } 1359 1360 if (!mode_change) { 1361 iwl_set_mode(priv, ctx); 1362 if (!ctx->always_active) 1363 ctx->is_active = false; 1364 } 1365 1366 /* 1367 * When removing the IBSS interface, overwrite the 1368 * BT traffic load with the stored one from the last 1369 * notification, if any. If this is a device that 1370 * doesn't implement this, this has no effect since 1371 * both values are the same and zero. 1372 */ 1373 if (vif->type == NL80211_IFTYPE_ADHOC) 1374 priv->bt_traffic_load = priv->last_bt_traffic_load; 1375 } 1376 1377 static void iwlagn_mac_remove_interface(struct ieee80211_hw *hw, 1378 struct ieee80211_vif *vif) 1379 { 1380 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1381 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif); 1382 1383 IWL_DEBUG_MAC80211(priv, "enter\n"); 1384 1385 mutex_lock(&priv->mutex); 1386 1387 WARN_ON(ctx->vif != vif); 1388 ctx->vif = NULL; 1389 1390 iwl_teardown_interface(priv, vif, false); 1391 1392 mutex_unlock(&priv->mutex); 1393 1394 IWL_DEBUG_MAC80211(priv, "leave\n"); 1395 1396 } 1397 1398 static int iwlagn_mac_change_interface(struct ieee80211_hw *hw, 1399 struct ieee80211_vif *vif, 1400 enum nl80211_iftype newtype, bool newp2p) 1401 { 1402 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1403 struct iwl_rxon_context *ctx, *tmp; 1404 enum nl80211_iftype newviftype = newtype; 1405 u32 interface_modes; 1406 int err; 1407 1408 IWL_DEBUG_MAC80211(priv, "enter\n"); 1409 1410 newtype = ieee80211_iftype_p2p(newtype, newp2p); 1411 1412 mutex_lock(&priv->mutex); 1413 1414 ctx = iwl_rxon_ctx_from_vif(vif); 1415 1416 /* 1417 * To simplify this code, only support changes on the 1418 * BSS context. The PAN context is usually reassigned 1419 * by creating/removing P2P interfaces anyway. 1420 */ 1421 if (ctx->ctxid != IWL_RXON_CTX_BSS) { 1422 err = -EBUSY; 1423 goto out; 1424 } 1425 1426 if (!ctx->vif || !iwl_is_ready_rf(priv)) { 1427 /* 1428 * Huh? But wait ... this can maybe happen when 1429 * we're in the middle of a firmware restart! 1430 */ 1431 err = -EBUSY; 1432 goto out; 1433 } 1434 1435 /* Check if the switch is supported in the same context */ 1436 interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes; 1437 if (!(interface_modes & BIT(newtype))) { 1438 err = -EBUSY; 1439 goto out; 1440 } 1441 1442 if (ctx->exclusive_interface_modes & BIT(newtype)) { 1443 for_each_context(priv, tmp) { 1444 if (ctx == tmp) 1445 continue; 1446 1447 if (!tmp->is_active) 1448 continue; 1449 1450 /* 1451 * The current mode switch would be exclusive, but 1452 * another context is active ... refuse the switch. 1453 */ 1454 err = -EBUSY; 1455 goto out; 1456 } 1457 } 1458 1459 /* success */ 1460 iwl_teardown_interface(priv, vif, true); 1461 vif->type = newviftype; 1462 vif->p2p = newp2p; 1463 err = iwl_setup_interface(priv, ctx); 1464 WARN_ON(err); 1465 /* 1466 * We've switched internally, but submitting to the 1467 * device may have failed for some reason. Mask this 1468 * error, because otherwise mac80211 will not switch 1469 * (and set the interface type back) and we'll be 1470 * out of sync with it. 1471 */ 1472 err = 0; 1473 1474 out: 1475 mutex_unlock(&priv->mutex); 1476 IWL_DEBUG_MAC80211(priv, "leave\n"); 1477 1478 return err; 1479 } 1480 1481 static int iwlagn_mac_hw_scan(struct ieee80211_hw *hw, 1482 struct ieee80211_vif *vif, 1483 struct ieee80211_scan_request *hw_req) 1484 { 1485 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1486 struct cfg80211_scan_request *req = &hw_req->req; 1487 int ret; 1488 1489 IWL_DEBUG_MAC80211(priv, "enter\n"); 1490 1491 if (req->n_channels == 0) 1492 return -EINVAL; 1493 1494 mutex_lock(&priv->mutex); 1495 1496 /* 1497 * If an internal scan is in progress, just set 1498 * up the scan_request as per above. 1499 */ 1500 if (priv->scan_type != IWL_SCAN_NORMAL) { 1501 IWL_DEBUG_SCAN(priv, 1502 "SCAN request during internal scan - defer\n"); 1503 priv->scan_request = req; 1504 priv->scan_vif = vif; 1505 ret = 0; 1506 } else { 1507 priv->scan_request = req; 1508 priv->scan_vif = vif; 1509 /* 1510 * mac80211 will only ask for one band at a time 1511 * so using channels[0] here is ok 1512 */ 1513 ret = iwl_scan_initiate(priv, vif, IWL_SCAN_NORMAL, 1514 req->channels[0]->band); 1515 if (ret) { 1516 priv->scan_request = NULL; 1517 priv->scan_vif = NULL; 1518 } 1519 } 1520 1521 IWL_DEBUG_MAC80211(priv, "leave\n"); 1522 1523 mutex_unlock(&priv->mutex); 1524 1525 return ret; 1526 } 1527 1528 static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id) 1529 { 1530 struct iwl_addsta_cmd cmd = { 1531 .mode = STA_CONTROL_MODIFY_MSK, 1532 .station_flags_msk = STA_FLG_PWR_SAVE_MSK, 1533 .sta.sta_id = sta_id, 1534 }; 1535 1536 iwl_send_add_sta(priv, &cmd, CMD_ASYNC); 1537 } 1538 1539 static void iwlagn_mac_sta_notify(struct ieee80211_hw *hw, 1540 struct ieee80211_vif *vif, 1541 enum sta_notify_cmd cmd, 1542 struct ieee80211_sta *sta) 1543 { 1544 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1545 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv; 1546 int sta_id; 1547 1548 IWL_DEBUG_MAC80211(priv, "enter\n"); 1549 1550 switch (cmd) { 1551 case STA_NOTIFY_SLEEP: 1552 WARN_ON(!sta_priv->client); 1553 sta_priv->asleep = true; 1554 if (atomic_read(&sta_priv->pending_frames) > 0) 1555 ieee80211_sta_block_awake(hw, sta, true); 1556 break; 1557 case STA_NOTIFY_AWAKE: 1558 WARN_ON(!sta_priv->client); 1559 if (!sta_priv->asleep) 1560 break; 1561 sta_priv->asleep = false; 1562 sta_id = iwl_sta_id(sta); 1563 if (sta_id != IWL_INVALID_STATION) 1564 iwl_sta_modify_ps_wake(priv, sta_id); 1565 break; 1566 default: 1567 break; 1568 } 1569 IWL_DEBUG_MAC80211(priv, "leave\n"); 1570 } 1571 1572 const struct ieee80211_ops iwlagn_hw_ops = { 1573 .tx = iwlagn_mac_tx, 1574 .wake_tx_queue = ieee80211_handle_wake_tx_queue, 1575 .start = iwlagn_mac_start, 1576 .stop = iwlagn_mac_stop, 1577 #ifdef CONFIG_PM_SLEEP 1578 .suspend = iwlagn_mac_suspend, 1579 .resume = iwlagn_mac_resume, 1580 .set_wakeup = iwlagn_mac_set_wakeup, 1581 #endif 1582 .add_interface = iwlagn_mac_add_interface, 1583 .remove_interface = iwlagn_mac_remove_interface, 1584 .change_interface = iwlagn_mac_change_interface, 1585 .config = iwlagn_mac_config, 1586 .configure_filter = iwlagn_configure_filter, 1587 .set_key = iwlagn_mac_set_key, 1588 .update_tkip_key = iwlagn_mac_update_tkip_key, 1589 .set_rekey_data = iwlagn_mac_set_rekey_data, 1590 .conf_tx = iwlagn_mac_conf_tx, 1591 .bss_info_changed = iwlagn_bss_info_changed, 1592 .ampdu_action = iwlagn_mac_ampdu_action, 1593 .hw_scan = iwlagn_mac_hw_scan, 1594 .sta_notify = iwlagn_mac_sta_notify, 1595 .sta_state = iwlagn_mac_sta_state, 1596 .channel_switch = iwlagn_mac_channel_switch, 1597 .flush = iwlagn_mac_flush, 1598 .tx_last_beacon = iwlagn_mac_tx_last_beacon, 1599 .event_callback = iwlagn_mac_event_callback, 1600 .set_tim = iwlagn_mac_set_tim, 1601 }; 1602 1603 /* This function both allocates and initializes hw and priv. */ 1604 struct ieee80211_hw *iwl_alloc_all(void) 1605 { 1606 struct iwl_priv *priv; 1607 struct iwl_op_mode *op_mode; 1608 /* mac80211 allocates memory for this device instance, including 1609 * space for this driver's private structure */ 1610 struct ieee80211_hw *hw; 1611 1612 hw = ieee80211_alloc_hw(sizeof(struct iwl_priv) + 1613 sizeof(struct iwl_op_mode), &iwlagn_hw_ops); 1614 if (!hw) 1615 goto out; 1616 1617 op_mode = hw->priv; 1618 priv = IWL_OP_MODE_GET_DVM(op_mode); 1619 priv->hw = hw; 1620 1621 out: 1622 return hw; 1623 } 1624