1 /****************************************************************************** 2 * 3 * Copyright(c) 2003 - 2014 Intel Corporation. All rights reserved. 4 * Copyright (C) 2018 Intel Corporation 5 * 6 * Portions of this file are derived from the ipw3945 project, as well 7 * as portions of the ieee80211 subsystem header files. 8 * 9 * This program is free software; you can redistribute it and/or modify it 10 * under the terms of version 2 of the GNU General Public License as 11 * published by the Free Software Foundation. 12 * 13 * This program is distributed in the hope that it will be useful, but WITHOUT 14 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 15 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 16 * more details. 17 * 18 * The full GNU General Public License is included in this distribution in the 19 * file called LICENSE. 20 * 21 * Contact Information: 22 * Intel Linux Wireless <linuxwifi@intel.com> 23 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 24 * 25 *****************************************************************************/ 26 #include <linux/kernel.h> 27 #include <linux/module.h> 28 #include <linux/slab.h> 29 #include <linux/dma-mapping.h> 30 #include <linux/delay.h> 31 #include <linux/sched.h> 32 #include <linux/skbuff.h> 33 #include <linux/netdevice.h> 34 #include <linux/etherdevice.h> 35 #include <linux/if_arp.h> 36 37 #include <net/ieee80211_radiotap.h> 38 #include <net/mac80211.h> 39 40 #include <asm/div64.h> 41 42 #include "iwl-io.h" 43 #include "iwl-trans.h" 44 #include "iwl-op-mode.h" 45 #include "iwl-modparams.h" 46 47 #include "dev.h" 48 #include "calib.h" 49 #include "agn.h" 50 51 /***************************************************************************** 52 * 53 * mac80211 entry point functions 54 * 55 *****************************************************************************/ 56 57 static const struct ieee80211_iface_limit iwlagn_sta_ap_limits[] = { 58 { 59 .max = 1, 60 .types = BIT(NL80211_IFTYPE_STATION), 61 }, 62 { 63 .max = 1, 64 .types = BIT(NL80211_IFTYPE_AP), 65 }, 66 }; 67 68 static const struct ieee80211_iface_limit iwlagn_2sta_limits[] = { 69 { 70 .max = 2, 71 .types = BIT(NL80211_IFTYPE_STATION), 72 }, 73 }; 74 75 static const struct ieee80211_iface_combination 76 iwlagn_iface_combinations_dualmode[] = { 77 { .num_different_channels = 1, 78 .max_interfaces = 2, 79 .beacon_int_infra_match = true, 80 .limits = iwlagn_sta_ap_limits, 81 .n_limits = ARRAY_SIZE(iwlagn_sta_ap_limits), 82 }, 83 { .num_different_channels = 1, 84 .max_interfaces = 2, 85 .limits = iwlagn_2sta_limits, 86 .n_limits = ARRAY_SIZE(iwlagn_2sta_limits), 87 }, 88 }; 89 90 /* 91 * Not a mac80211 entry point function, but it fits in with all the 92 * other mac80211 functions grouped here. 93 */ 94 int iwlagn_mac_setup_register(struct iwl_priv *priv, 95 const struct iwl_ucode_capabilities *capa) 96 { 97 int ret; 98 struct ieee80211_hw *hw = priv->hw; 99 struct iwl_rxon_context *ctx; 100 101 hw->rate_control_algorithm = "iwl-agn-rs"; 102 103 /* Tell mac80211 our characteristics */ 104 ieee80211_hw_set(hw, SIGNAL_DBM); 105 ieee80211_hw_set(hw, AMPDU_AGGREGATION); 106 ieee80211_hw_set(hw, NEED_DTIM_BEFORE_ASSOC); 107 ieee80211_hw_set(hw, SPECTRUM_MGMT); 108 ieee80211_hw_set(hw, REPORTS_TX_ACK_STATUS); 109 ieee80211_hw_set(hw, QUEUE_CONTROL); 110 ieee80211_hw_set(hw, SUPPORTS_PS); 111 ieee80211_hw_set(hw, SUPPORTS_DYNAMIC_PS); 112 ieee80211_hw_set(hw, SUPPORT_FAST_XMIT); 113 ieee80211_hw_set(hw, WANT_MONITOR_VIF); 114 115 if (priv->trans->max_skb_frags) 116 hw->netdev_features = NETIF_F_HIGHDMA | NETIF_F_SG; 117 118 hw->offchannel_tx_hw_queue = IWL_AUX_QUEUE; 119 hw->radiotap_mcs_details |= IEEE80211_RADIOTAP_MCS_HAVE_FMT; 120 121 /* 122 * Including the following line will crash some AP's. This 123 * workaround removes the stimulus which causes the crash until 124 * the AP software can be fixed. 125 hw->max_tx_aggregation_subframes = LINK_QUAL_AGG_FRAME_LIMIT_DEF; 126 */ 127 128 if (priv->nvm_data->sku_cap_11n_enable) 129 hw->wiphy->features |= NL80211_FEATURE_DYNAMIC_SMPS | 130 NL80211_FEATURE_STATIC_SMPS; 131 132 /* 133 * Enable 11w if advertised by firmware and software crypto 134 * is not enabled (as the firmware will interpret some mgmt 135 * packets, so enabling it with software crypto isn't safe) 136 */ 137 if (priv->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_MFP && 138 !iwlwifi_mod_params.swcrypto) 139 ieee80211_hw_set(hw, MFP_CAPABLE); 140 141 hw->sta_data_size = sizeof(struct iwl_station_priv); 142 hw->vif_data_size = sizeof(struct iwl_vif_priv); 143 144 for_each_context(priv, ctx) { 145 hw->wiphy->interface_modes |= ctx->interface_modes; 146 hw->wiphy->interface_modes |= ctx->exclusive_interface_modes; 147 } 148 149 BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2); 150 151 if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) { 152 hw->wiphy->iface_combinations = 153 iwlagn_iface_combinations_dualmode; 154 hw->wiphy->n_iface_combinations = 155 ARRAY_SIZE(iwlagn_iface_combinations_dualmode); 156 } 157 158 hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN; 159 hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG | 160 REGULATORY_DISABLE_BEACON_HINTS; 161 162 #ifdef CONFIG_PM_SLEEP 163 if (priv->fw->img[IWL_UCODE_WOWLAN].num_sec && 164 priv->trans->ops->d3_suspend && 165 priv->trans->ops->d3_resume && 166 device_can_wakeup(priv->trans->dev)) { 167 priv->wowlan_support.flags = WIPHY_WOWLAN_MAGIC_PKT | 168 WIPHY_WOWLAN_DISCONNECT | 169 WIPHY_WOWLAN_EAP_IDENTITY_REQ | 170 WIPHY_WOWLAN_RFKILL_RELEASE; 171 if (!iwlwifi_mod_params.swcrypto) 172 priv->wowlan_support.flags |= 173 WIPHY_WOWLAN_SUPPORTS_GTK_REKEY | 174 WIPHY_WOWLAN_GTK_REKEY_FAILURE; 175 176 priv->wowlan_support.n_patterns = IWLAGN_WOWLAN_MAX_PATTERNS; 177 priv->wowlan_support.pattern_min_len = 178 IWLAGN_WOWLAN_MIN_PATTERN_LEN; 179 priv->wowlan_support.pattern_max_len = 180 IWLAGN_WOWLAN_MAX_PATTERN_LEN; 181 hw->wiphy->wowlan = &priv->wowlan_support; 182 } 183 #endif 184 185 if (iwlwifi_mod_params.power_save) 186 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT; 187 else 188 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT; 189 190 hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX; 191 /* we create the 802.11 header and a max-length SSID element */ 192 hw->wiphy->max_scan_ie_len = capa->max_probe_length - 24 - 34; 193 194 /* 195 * We don't use all queues: 4 and 9 are unused and any 196 * aggregation queue gets mapped down to the AC queue. 197 */ 198 hw->queues = IWLAGN_FIRST_AMPDU_QUEUE; 199 200 hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL; 201 202 if (priv->nvm_data->bands[NL80211_BAND_2GHZ].n_channels) 203 priv->hw->wiphy->bands[NL80211_BAND_2GHZ] = 204 &priv->nvm_data->bands[NL80211_BAND_2GHZ]; 205 if (priv->nvm_data->bands[NL80211_BAND_5GHZ].n_channels) 206 priv->hw->wiphy->bands[NL80211_BAND_5GHZ] = 207 &priv->nvm_data->bands[NL80211_BAND_5GHZ]; 208 209 hw->wiphy->hw_version = priv->trans->hw_id; 210 211 iwl_leds_init(priv); 212 213 wiphy_ext_feature_set(hw->wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST); 214 215 ret = ieee80211_register_hw(priv->hw); 216 if (ret) { 217 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret); 218 iwl_leds_exit(priv); 219 return ret; 220 } 221 priv->mac80211_registered = 1; 222 223 return 0; 224 } 225 226 void iwlagn_mac_unregister(struct iwl_priv *priv) 227 { 228 if (!priv->mac80211_registered) 229 return; 230 iwl_leds_exit(priv); 231 ieee80211_unregister_hw(priv->hw); 232 priv->mac80211_registered = 0; 233 } 234 235 static int __iwl_up(struct iwl_priv *priv) 236 { 237 struct iwl_rxon_context *ctx; 238 int ret; 239 240 lockdep_assert_held(&priv->mutex); 241 242 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) { 243 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n"); 244 return -EIO; 245 } 246 247 for_each_context(priv, ctx) { 248 ret = iwlagn_alloc_bcast_station(priv, ctx); 249 if (ret) { 250 iwl_dealloc_bcast_stations(priv); 251 return ret; 252 } 253 } 254 255 ret = iwl_trans_start_hw(priv->trans); 256 if (ret) { 257 IWL_ERR(priv, "Failed to start HW: %d\n", ret); 258 goto error; 259 } 260 261 ret = iwl_run_init_ucode(priv); 262 if (ret) { 263 IWL_ERR(priv, "Failed to run INIT ucode: %d\n", ret); 264 goto error; 265 } 266 267 ret = iwl_trans_start_hw(priv->trans); 268 if (ret) { 269 IWL_ERR(priv, "Failed to start HW: %d\n", ret); 270 goto error; 271 } 272 273 ret = iwl_load_ucode_wait_alive(priv, IWL_UCODE_REGULAR); 274 if (ret) { 275 IWL_ERR(priv, "Failed to start RT ucode: %d\n", ret); 276 goto error; 277 } 278 279 ret = iwl_alive_start(priv); 280 if (ret) 281 goto error; 282 return 0; 283 284 error: 285 set_bit(STATUS_EXIT_PENDING, &priv->status); 286 iwl_down(priv); 287 clear_bit(STATUS_EXIT_PENDING, &priv->status); 288 289 IWL_ERR(priv, "Unable to initialize device.\n"); 290 return ret; 291 } 292 293 static int iwlagn_mac_start(struct ieee80211_hw *hw) 294 { 295 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 296 int ret; 297 298 IWL_DEBUG_MAC80211(priv, "enter\n"); 299 300 /* we should be verifying the device is ready to be opened */ 301 mutex_lock(&priv->mutex); 302 ret = __iwl_up(priv); 303 mutex_unlock(&priv->mutex); 304 if (ret) 305 return ret; 306 307 IWL_DEBUG_INFO(priv, "Start UP work done.\n"); 308 309 /* Now we should be done, and the READY bit should be set. */ 310 if (WARN_ON(!test_bit(STATUS_READY, &priv->status))) 311 ret = -EIO; 312 313 iwlagn_led_enable(priv); 314 315 priv->is_open = 1; 316 IWL_DEBUG_MAC80211(priv, "leave\n"); 317 return 0; 318 } 319 320 static void iwlagn_mac_stop(struct ieee80211_hw *hw) 321 { 322 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 323 324 IWL_DEBUG_MAC80211(priv, "enter\n"); 325 326 if (!priv->is_open) 327 return; 328 329 priv->is_open = 0; 330 331 mutex_lock(&priv->mutex); 332 iwl_down(priv); 333 mutex_unlock(&priv->mutex); 334 335 iwl_cancel_deferred_work(priv); 336 337 flush_workqueue(priv->workqueue); 338 339 IWL_DEBUG_MAC80211(priv, "leave\n"); 340 } 341 342 static void iwlagn_mac_set_rekey_data(struct ieee80211_hw *hw, 343 struct ieee80211_vif *vif, 344 struct cfg80211_gtk_rekey_data *data) 345 { 346 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 347 348 if (iwlwifi_mod_params.swcrypto) 349 return; 350 351 IWL_DEBUG_MAC80211(priv, "enter\n"); 352 mutex_lock(&priv->mutex); 353 354 if (priv->contexts[IWL_RXON_CTX_BSS].vif != vif) 355 goto out; 356 357 memcpy(priv->kek, data->kek, NL80211_KEK_LEN); 358 memcpy(priv->kck, data->kck, NL80211_KCK_LEN); 359 priv->replay_ctr = 360 cpu_to_le64(be64_to_cpup((__be64 *)&data->replay_ctr)); 361 priv->have_rekey_data = true; 362 363 out: 364 mutex_unlock(&priv->mutex); 365 IWL_DEBUG_MAC80211(priv, "leave\n"); 366 } 367 368 #ifdef CONFIG_PM_SLEEP 369 370 static int iwlagn_mac_suspend(struct ieee80211_hw *hw, 371 struct cfg80211_wowlan *wowlan) 372 { 373 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 374 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS]; 375 int ret; 376 377 if (WARN_ON(!wowlan)) 378 return -EINVAL; 379 380 IWL_DEBUG_MAC80211(priv, "enter\n"); 381 mutex_lock(&priv->mutex); 382 383 /* Don't attempt WoWLAN when not associated, tear down instead. */ 384 if (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION || 385 !iwl_is_associated_ctx(ctx)) { 386 ret = 1; 387 goto out; 388 } 389 390 ret = iwlagn_suspend(priv, wowlan); 391 if (ret) 392 goto error; 393 394 /* let the ucode operate on its own */ 395 iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_SET, 396 CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE); 397 398 iwl_trans_d3_suspend(priv->trans, false, true); 399 400 goto out; 401 402 error: 403 priv->wowlan = false; 404 iwlagn_prepare_restart(priv); 405 ieee80211_restart_hw(priv->hw); 406 out: 407 mutex_unlock(&priv->mutex); 408 IWL_DEBUG_MAC80211(priv, "leave\n"); 409 410 return ret; 411 } 412 413 struct iwl_resume_data { 414 struct iwl_priv *priv; 415 struct iwlagn_wowlan_status *cmd; 416 bool valid; 417 }; 418 419 static bool iwl_resume_status_fn(struct iwl_notif_wait_data *notif_wait, 420 struct iwl_rx_packet *pkt, void *data) 421 { 422 struct iwl_resume_data *resume_data = data; 423 struct iwl_priv *priv = resume_data->priv; 424 425 if (iwl_rx_packet_payload_len(pkt) != sizeof(*resume_data->cmd)) { 426 IWL_ERR(priv, "rx wrong size data\n"); 427 return true; 428 } 429 memcpy(resume_data->cmd, pkt->data, sizeof(*resume_data->cmd)); 430 resume_data->valid = true; 431 432 return true; 433 } 434 435 static int iwlagn_mac_resume(struct ieee80211_hw *hw) 436 { 437 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 438 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS]; 439 struct ieee80211_vif *vif; 440 u32 base; 441 int ret; 442 enum iwl_d3_status d3_status; 443 struct error_table_start { 444 /* cf. struct iwl_error_event_table */ 445 u32 valid; 446 u32 error_id; 447 } err_info; 448 struct iwl_notification_wait status_wait; 449 static const u16 status_cmd[] = { 450 REPLY_WOWLAN_GET_STATUS, 451 }; 452 struct iwlagn_wowlan_status status_data = {}; 453 struct iwl_resume_data resume_data = { 454 .priv = priv, 455 .cmd = &status_data, 456 .valid = false, 457 }; 458 struct cfg80211_wowlan_wakeup wakeup = { 459 .pattern_idx = -1, 460 }; 461 #ifdef CONFIG_IWLWIFI_DEBUGFS 462 const struct fw_img *img; 463 #endif 464 465 IWL_DEBUG_MAC80211(priv, "enter\n"); 466 mutex_lock(&priv->mutex); 467 468 /* we'll clear ctx->vif during iwlagn_prepare_restart() */ 469 vif = ctx->vif; 470 471 ret = iwl_trans_d3_resume(priv->trans, &d3_status, false, true); 472 if (ret) 473 goto out_unlock; 474 475 if (d3_status != IWL_D3_STATUS_ALIVE) { 476 IWL_INFO(priv, "Device was reset during suspend\n"); 477 goto out_unlock; 478 } 479 480 /* uCode is no longer operating by itself */ 481 iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_CLR, 482 CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE); 483 484 base = priv->device_pointers.error_event_table; 485 if (!iwlagn_hw_valid_rtc_data_addr(base)) { 486 IWL_WARN(priv, "Invalid error table during resume!\n"); 487 goto out_unlock; 488 } 489 490 iwl_trans_read_mem_bytes(priv->trans, base, 491 &err_info, sizeof(err_info)); 492 493 if (err_info.valid) { 494 IWL_INFO(priv, "error table is valid (%d, 0x%x)\n", 495 err_info.valid, err_info.error_id); 496 if (err_info.error_id == RF_KILL_INDICATOR_FOR_WOWLAN) { 497 wakeup.rfkill_release = true; 498 ieee80211_report_wowlan_wakeup(vif, &wakeup, 499 GFP_KERNEL); 500 } 501 goto out_unlock; 502 } 503 504 #ifdef CONFIG_IWLWIFI_DEBUGFS 505 img = &priv->fw->img[IWL_UCODE_WOWLAN]; 506 if (!priv->wowlan_sram) 507 priv->wowlan_sram = 508 kzalloc(img->sec[IWL_UCODE_SECTION_DATA].len, 509 GFP_KERNEL); 510 511 if (priv->wowlan_sram) 512 iwl_trans_read_mem(priv->trans, 0x800000, 513 priv->wowlan_sram, 514 img->sec[IWL_UCODE_SECTION_DATA].len / 4); 515 #endif 516 517 /* 518 * This is very strange. The GET_STATUS command is sent but the device 519 * doesn't reply properly, it seems it doesn't close the RBD so one is 520 * always left open ... As a result, we need to send another command 521 * and have to reset the driver afterwards. As we need to switch to 522 * runtime firmware again that'll happen. 523 */ 524 525 iwl_init_notification_wait(&priv->notif_wait, &status_wait, status_cmd, 526 ARRAY_SIZE(status_cmd), iwl_resume_status_fn, 527 &resume_data); 528 529 iwl_dvm_send_cmd_pdu(priv, REPLY_WOWLAN_GET_STATUS, CMD_ASYNC, 0, NULL); 530 iwl_dvm_send_cmd_pdu(priv, REPLY_ECHO, CMD_ASYNC, 0, NULL); 531 /* an RBD is left open in the firmware now! */ 532 533 ret = iwl_wait_notification(&priv->notif_wait, &status_wait, HZ/5); 534 if (ret) 535 goto out_unlock; 536 537 if (resume_data.valid && priv->contexts[IWL_RXON_CTX_BSS].vif) { 538 u32 reasons = le32_to_cpu(status_data.wakeup_reason); 539 struct cfg80211_wowlan_wakeup *wakeup_report; 540 541 IWL_INFO(priv, "WoWLAN wakeup reason(s): 0x%.8x\n", reasons); 542 543 if (reasons) { 544 if (reasons & IWLAGN_WOWLAN_WAKEUP_MAGIC_PACKET) 545 wakeup.magic_pkt = true; 546 if (reasons & IWLAGN_WOWLAN_WAKEUP_PATTERN_MATCH) 547 wakeup.pattern_idx = status_data.pattern_number; 548 if (reasons & (IWLAGN_WOWLAN_WAKEUP_BEACON_MISS | 549 IWLAGN_WOWLAN_WAKEUP_LINK_CHANGE)) 550 wakeup.disconnect = true; 551 if (reasons & IWLAGN_WOWLAN_WAKEUP_GTK_REKEY_FAIL) 552 wakeup.gtk_rekey_failure = true; 553 if (reasons & IWLAGN_WOWLAN_WAKEUP_EAP_IDENT_REQ) 554 wakeup.eap_identity_req = true; 555 if (reasons & IWLAGN_WOWLAN_WAKEUP_4WAY_HANDSHAKE) 556 wakeup.four_way_handshake = true; 557 wakeup_report = &wakeup; 558 } else { 559 wakeup_report = NULL; 560 } 561 562 ieee80211_report_wowlan_wakeup(vif, wakeup_report, GFP_KERNEL); 563 } 564 565 priv->wowlan = false; 566 567 iwlagn_prepare_restart(priv); 568 569 memset((void *)&ctx->active, 0, sizeof(ctx->active)); 570 iwl_connection_init_rx_config(priv, ctx); 571 iwlagn_set_rxon_chain(priv, ctx); 572 573 out_unlock: 574 mutex_unlock(&priv->mutex); 575 IWL_DEBUG_MAC80211(priv, "leave\n"); 576 577 ieee80211_resume_disconnect(vif); 578 579 return 1; 580 } 581 582 static void iwlagn_mac_set_wakeup(struct ieee80211_hw *hw, bool enabled) 583 { 584 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 585 586 device_set_wakeup_enable(priv->trans->dev, enabled); 587 } 588 #endif 589 590 static void iwlagn_mac_tx(struct ieee80211_hw *hw, 591 struct ieee80211_tx_control *control, 592 struct sk_buff *skb) 593 { 594 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 595 596 if (iwlagn_tx_skb(priv, control->sta, skb)) 597 ieee80211_free_txskb(hw, skb); 598 } 599 600 static void iwlagn_mac_update_tkip_key(struct ieee80211_hw *hw, 601 struct ieee80211_vif *vif, 602 struct ieee80211_key_conf *keyconf, 603 struct ieee80211_sta *sta, 604 u32 iv32, u16 *phase1key) 605 { 606 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 607 608 iwl_update_tkip_key(priv, vif, keyconf, sta, iv32, phase1key); 609 } 610 611 static int iwlagn_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd, 612 struct ieee80211_vif *vif, 613 struct ieee80211_sta *sta, 614 struct ieee80211_key_conf *key) 615 { 616 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 617 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv; 618 struct iwl_rxon_context *ctx = vif_priv->ctx; 619 int ret; 620 bool is_default_wep_key = false; 621 622 IWL_DEBUG_MAC80211(priv, "enter\n"); 623 624 if (iwlwifi_mod_params.swcrypto) { 625 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n"); 626 return -EOPNOTSUPP; 627 } 628 629 switch (key->cipher) { 630 case WLAN_CIPHER_SUITE_TKIP: 631 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC; 632 /* fall through */ 633 case WLAN_CIPHER_SUITE_CCMP: 634 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV; 635 break; 636 default: 637 break; 638 } 639 640 /* 641 * We could program these keys into the hardware as well, but we 642 * don't expect much multicast traffic in IBSS and having keys 643 * for more stations is probably more useful. 644 * 645 * Mark key TX-only and return 0. 646 */ 647 if (vif->type == NL80211_IFTYPE_ADHOC && 648 !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) { 649 key->hw_key_idx = WEP_INVALID_OFFSET; 650 return 0; 651 } 652 653 /* If they key was TX-only, accept deletion */ 654 if (cmd == DISABLE_KEY && key->hw_key_idx == WEP_INVALID_OFFSET) 655 return 0; 656 657 mutex_lock(&priv->mutex); 658 iwl_scan_cancel_timeout(priv, 100); 659 660 BUILD_BUG_ON(WEP_INVALID_OFFSET == IWLAGN_HW_KEY_DEFAULT); 661 662 /* 663 * If we are getting WEP group key and we didn't receive any key mapping 664 * so far, we are in legacy wep mode (group key only), otherwise we are 665 * in 1X mode. 666 * In legacy wep mode, we use another host command to the uCode. 667 */ 668 if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 || 669 key->cipher == WLAN_CIPHER_SUITE_WEP104) && !sta) { 670 if (cmd == SET_KEY) 671 is_default_wep_key = !ctx->key_mapping_keys; 672 else 673 is_default_wep_key = 674 key->hw_key_idx == IWLAGN_HW_KEY_DEFAULT; 675 } 676 677 678 switch (cmd) { 679 case SET_KEY: 680 if (is_default_wep_key) { 681 ret = iwl_set_default_wep_key(priv, vif_priv->ctx, key); 682 break; 683 } 684 ret = iwl_set_dynamic_key(priv, vif_priv->ctx, key, sta); 685 if (ret) { 686 /* 687 * can't add key for RX, but we don't need it 688 * in the device for TX so still return 0 689 */ 690 ret = 0; 691 key->hw_key_idx = WEP_INVALID_OFFSET; 692 } 693 694 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n"); 695 break; 696 case DISABLE_KEY: 697 if (is_default_wep_key) 698 ret = iwl_remove_default_wep_key(priv, ctx, key); 699 else 700 ret = iwl_remove_dynamic_key(priv, ctx, key, sta); 701 702 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n"); 703 break; 704 default: 705 ret = -EINVAL; 706 } 707 708 mutex_unlock(&priv->mutex); 709 IWL_DEBUG_MAC80211(priv, "leave\n"); 710 711 return ret; 712 } 713 714 static int iwlagn_mac_ampdu_action(struct ieee80211_hw *hw, 715 struct ieee80211_vif *vif, 716 struct ieee80211_ampdu_params *params) 717 { 718 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 719 int ret = -EINVAL; 720 struct ieee80211_sta *sta = params->sta; 721 enum ieee80211_ampdu_mlme_action action = params->action; 722 u16 tid = params->tid; 723 u16 *ssn = ¶ms->ssn; 724 u8 buf_size = params->buf_size; 725 struct iwl_station_priv *sta_priv = (void *) sta->drv_priv; 726 727 IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n", 728 sta->addr, tid); 729 730 if (!(priv->nvm_data->sku_cap_11n_enable)) 731 return -EACCES; 732 733 IWL_DEBUG_MAC80211(priv, "enter\n"); 734 mutex_lock(&priv->mutex); 735 736 switch (action) { 737 case IEEE80211_AMPDU_RX_START: 738 if (!iwl_enable_rx_ampdu()) 739 break; 740 IWL_DEBUG_HT(priv, "start Rx\n"); 741 ret = iwl_sta_rx_agg_start(priv, sta, tid, *ssn); 742 break; 743 case IEEE80211_AMPDU_RX_STOP: 744 IWL_DEBUG_HT(priv, "stop Rx\n"); 745 ret = iwl_sta_rx_agg_stop(priv, sta, tid); 746 break; 747 case IEEE80211_AMPDU_TX_START: 748 if (!priv->trans->ops->txq_enable) 749 break; 750 if (!iwl_enable_tx_ampdu()) 751 break; 752 IWL_DEBUG_HT(priv, "start Tx\n"); 753 ret = iwlagn_tx_agg_start(priv, vif, sta, tid, ssn); 754 break; 755 case IEEE80211_AMPDU_TX_STOP_FLUSH: 756 case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT: 757 IWL_DEBUG_HT(priv, "Flush Tx\n"); 758 ret = iwlagn_tx_agg_flush(priv, vif, sta, tid); 759 break; 760 case IEEE80211_AMPDU_TX_STOP_CONT: 761 IWL_DEBUG_HT(priv, "stop Tx\n"); 762 ret = iwlagn_tx_agg_stop(priv, vif, sta, tid); 763 if ((ret == 0) && (priv->agg_tids_count > 0)) { 764 priv->agg_tids_count--; 765 IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n", 766 priv->agg_tids_count); 767 } 768 if (!priv->agg_tids_count && 769 priv->hw_params.use_rts_for_aggregation) { 770 /* 771 * switch off RTS/CTS if it was previously enabled 772 */ 773 sta_priv->lq_sta.lq.general_params.flags &= 774 ~LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK; 775 iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif), 776 &sta_priv->lq_sta.lq, CMD_ASYNC, false); 777 } 778 break; 779 case IEEE80211_AMPDU_TX_OPERATIONAL: 780 ret = iwlagn_tx_agg_oper(priv, vif, sta, tid, buf_size); 781 break; 782 } 783 mutex_unlock(&priv->mutex); 784 IWL_DEBUG_MAC80211(priv, "leave\n"); 785 return ret; 786 } 787 788 static int iwlagn_mac_sta_add(struct ieee80211_hw *hw, 789 struct ieee80211_vif *vif, 790 struct ieee80211_sta *sta) 791 { 792 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 793 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv; 794 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv; 795 bool is_ap = vif->type == NL80211_IFTYPE_STATION; 796 int ret; 797 u8 sta_id; 798 799 IWL_DEBUG_INFO(priv, "proceeding to add station %pM\n", 800 sta->addr); 801 sta_priv->sta_id = IWL_INVALID_STATION; 802 803 atomic_set(&sta_priv->pending_frames, 0); 804 if (vif->type == NL80211_IFTYPE_AP) 805 sta_priv->client = true; 806 807 ret = iwl_add_station_common(priv, vif_priv->ctx, sta->addr, 808 is_ap, sta, &sta_id); 809 if (ret) { 810 IWL_ERR(priv, "Unable to add station %pM (%d)\n", 811 sta->addr, ret); 812 /* Should we return success if return code is EEXIST ? */ 813 return ret; 814 } 815 816 sta_priv->sta_id = sta_id; 817 818 return 0; 819 } 820 821 static int iwlagn_mac_sta_remove(struct ieee80211_hw *hw, 822 struct ieee80211_vif *vif, 823 struct ieee80211_sta *sta) 824 { 825 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 826 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv; 827 int ret; 828 829 IWL_DEBUG_INFO(priv, "proceeding to remove station %pM\n", sta->addr); 830 831 if (vif->type == NL80211_IFTYPE_STATION) { 832 /* 833 * Station will be removed from device when the RXON 834 * is set to unassociated -- just deactivate it here 835 * to avoid re-programming it. 836 */ 837 ret = 0; 838 iwl_deactivate_station(priv, sta_priv->sta_id, sta->addr); 839 } else { 840 ret = iwl_remove_station(priv, sta_priv->sta_id, sta->addr); 841 if (ret) 842 IWL_DEBUG_QUIET_RFKILL(priv, 843 "Error removing station %pM\n", sta->addr); 844 } 845 return ret; 846 } 847 848 static int iwlagn_mac_sta_state(struct ieee80211_hw *hw, 849 struct ieee80211_vif *vif, 850 struct ieee80211_sta *sta, 851 enum ieee80211_sta_state old_state, 852 enum ieee80211_sta_state new_state) 853 { 854 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 855 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv; 856 enum { 857 NONE, ADD, REMOVE, HT_RATE_INIT, ADD_RATE_INIT, 858 } op = NONE; 859 int ret; 860 861 IWL_DEBUG_MAC80211(priv, "station %pM state change %d->%d\n", 862 sta->addr, old_state, new_state); 863 864 mutex_lock(&priv->mutex); 865 if (vif->type == NL80211_IFTYPE_STATION) { 866 if (old_state == IEEE80211_STA_NOTEXIST && 867 new_state == IEEE80211_STA_NONE) 868 op = ADD; 869 else if (old_state == IEEE80211_STA_NONE && 870 new_state == IEEE80211_STA_NOTEXIST) 871 op = REMOVE; 872 else if (old_state == IEEE80211_STA_AUTH && 873 new_state == IEEE80211_STA_ASSOC) 874 op = HT_RATE_INIT; 875 } else { 876 if (old_state == IEEE80211_STA_AUTH && 877 new_state == IEEE80211_STA_ASSOC) 878 op = ADD_RATE_INIT; 879 else if (old_state == IEEE80211_STA_ASSOC && 880 new_state == IEEE80211_STA_AUTH) 881 op = REMOVE; 882 } 883 884 switch (op) { 885 case ADD: 886 ret = iwlagn_mac_sta_add(hw, vif, sta); 887 if (ret) 888 break; 889 /* 890 * Clear the in-progress flag, the AP station entry was added 891 * but we'll initialize LQ only when we've associated (which 892 * would also clear the in-progress flag). This is necessary 893 * in case we never initialize LQ because association fails. 894 */ 895 spin_lock_bh(&priv->sta_lock); 896 priv->stations[iwl_sta_id(sta)].used &= 897 ~IWL_STA_UCODE_INPROGRESS; 898 spin_unlock_bh(&priv->sta_lock); 899 break; 900 case REMOVE: 901 ret = iwlagn_mac_sta_remove(hw, vif, sta); 902 break; 903 case ADD_RATE_INIT: 904 ret = iwlagn_mac_sta_add(hw, vif, sta); 905 if (ret) 906 break; 907 /* Initialize rate scaling */ 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 case HT_RATE_INIT: 915 /* Initialize rate scaling */ 916 ret = iwl_sta_update_ht(priv, vif_priv->ctx, sta); 917 if (ret) 918 break; 919 IWL_DEBUG_INFO(priv, 920 "Initializing rate scaling for station %pM\n", 921 sta->addr); 922 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta)); 923 ret = 0; 924 break; 925 default: 926 ret = 0; 927 break; 928 } 929 930 /* 931 * mac80211 might WARN if we fail, but due the way we 932 * (badly) handle hard rfkill, we might fail here 933 */ 934 if (iwl_is_rfkill(priv)) 935 ret = 0; 936 937 mutex_unlock(&priv->mutex); 938 IWL_DEBUG_MAC80211(priv, "leave\n"); 939 940 return ret; 941 } 942 943 static void iwlagn_mac_channel_switch(struct ieee80211_hw *hw, 944 struct ieee80211_vif *vif, 945 struct ieee80211_channel_switch *ch_switch) 946 { 947 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 948 struct ieee80211_conf *conf = &hw->conf; 949 struct ieee80211_channel *channel = ch_switch->chandef.chan; 950 struct iwl_ht_config *ht_conf = &priv->current_ht_config; 951 /* 952 * MULTI-FIXME 953 * When we add support for multiple interfaces, we need to 954 * revisit this. The channel switch command in the device 955 * only affects the BSS context, but what does that really 956 * mean? And what if we get a CSA on the second interface? 957 * This needs a lot of work. 958 */ 959 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS]; 960 u16 ch; 961 962 IWL_DEBUG_MAC80211(priv, "enter\n"); 963 964 mutex_lock(&priv->mutex); 965 966 if (iwl_is_rfkill(priv)) 967 goto out; 968 969 if (test_bit(STATUS_EXIT_PENDING, &priv->status) || 970 test_bit(STATUS_SCANNING, &priv->status) || 971 test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status)) 972 goto out; 973 974 if (!iwl_is_associated_ctx(ctx)) 975 goto out; 976 977 if (!priv->lib->set_channel_switch) 978 goto out; 979 980 ch = channel->hw_value; 981 if (le16_to_cpu(ctx->active.channel) == ch) 982 goto out; 983 984 priv->current_ht_config.smps = conf->smps_mode; 985 986 /* Configure HT40 channels */ 987 switch (cfg80211_get_chandef_type(&ch_switch->chandef)) { 988 case NL80211_CHAN_NO_HT: 989 case NL80211_CHAN_HT20: 990 ctx->ht.is_40mhz = false; 991 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE; 992 break; 993 case NL80211_CHAN_HT40MINUS: 994 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_BELOW; 995 ctx->ht.is_40mhz = true; 996 break; 997 case NL80211_CHAN_HT40PLUS: 998 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_ABOVE; 999 ctx->ht.is_40mhz = true; 1000 break; 1001 } 1002 1003 if ((le16_to_cpu(ctx->staging.channel) != ch)) 1004 ctx->staging.flags = 0; 1005 1006 iwl_set_rxon_channel(priv, channel, ctx); 1007 iwl_set_rxon_ht(priv, ht_conf); 1008 iwl_set_flags_for_band(priv, ctx, channel->band, ctx->vif); 1009 1010 /* 1011 * at this point, staging_rxon has the 1012 * configuration for channel switch 1013 */ 1014 set_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status); 1015 priv->switch_channel = cpu_to_le16(ch); 1016 if (priv->lib->set_channel_switch(priv, ch_switch)) { 1017 clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status); 1018 priv->switch_channel = 0; 1019 ieee80211_chswitch_done(ctx->vif, false); 1020 } 1021 1022 out: 1023 mutex_unlock(&priv->mutex); 1024 IWL_DEBUG_MAC80211(priv, "leave\n"); 1025 } 1026 1027 void iwl_chswitch_done(struct iwl_priv *priv, bool is_success) 1028 { 1029 /* 1030 * MULTI-FIXME 1031 * See iwlagn_mac_channel_switch. 1032 */ 1033 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS]; 1034 1035 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) 1036 return; 1037 1038 if (!test_and_clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status)) 1039 return; 1040 1041 if (ctx->vif) 1042 ieee80211_chswitch_done(ctx->vif, is_success); 1043 } 1044 1045 static void iwlagn_configure_filter(struct ieee80211_hw *hw, 1046 unsigned int changed_flags, 1047 unsigned int *total_flags, 1048 u64 multicast) 1049 { 1050 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1051 __le32 filter_or = 0, filter_nand = 0; 1052 struct iwl_rxon_context *ctx; 1053 1054 #define CHK(test, flag) do { \ 1055 if (*total_flags & (test)) \ 1056 filter_or |= (flag); \ 1057 else \ 1058 filter_nand |= (flag); \ 1059 } while (0) 1060 1061 IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n", 1062 changed_flags, *total_flags); 1063 1064 CHK(FIF_OTHER_BSS, RXON_FILTER_PROMISC_MSK); 1065 /* Setting _just_ RXON_FILTER_CTL2HOST_MSK causes FH errors */ 1066 CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_PROMISC_MSK); 1067 CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK); 1068 1069 #undef CHK 1070 1071 mutex_lock(&priv->mutex); 1072 1073 for_each_context(priv, ctx) { 1074 ctx->staging.filter_flags &= ~filter_nand; 1075 ctx->staging.filter_flags |= filter_or; 1076 1077 /* 1078 * Not committing directly because hardware can perform a scan, 1079 * but we'll eventually commit the filter flags change anyway. 1080 */ 1081 } 1082 1083 mutex_unlock(&priv->mutex); 1084 1085 /* 1086 * Receiving all multicast frames is always enabled by the 1087 * default flags setup in iwl_connection_init_rx_config() 1088 * since we currently do not support programming multicast 1089 * filters into the device. 1090 */ 1091 *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | 1092 FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL; 1093 } 1094 1095 static void iwlagn_mac_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 1096 u32 queues, bool drop) 1097 { 1098 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1099 u32 scd_queues; 1100 1101 mutex_lock(&priv->mutex); 1102 IWL_DEBUG_MAC80211(priv, "enter\n"); 1103 1104 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) { 1105 IWL_DEBUG_TX(priv, "Aborting flush due to device shutdown\n"); 1106 goto done; 1107 } 1108 if (iwl_is_rfkill(priv)) { 1109 IWL_DEBUG_TX(priv, "Aborting flush due to RF Kill\n"); 1110 goto done; 1111 } 1112 1113 scd_queues = BIT(priv->cfg->base_params->num_of_queues) - 1; 1114 scd_queues &= ~(BIT(IWL_IPAN_CMD_QUEUE_NUM) | 1115 BIT(IWL_DEFAULT_CMD_QUEUE_NUM)); 1116 1117 if (drop) { 1118 IWL_DEBUG_TX_QUEUES(priv, "Flushing SCD queues: 0x%x\n", 1119 scd_queues); 1120 if (iwlagn_txfifo_flush(priv, scd_queues)) { 1121 IWL_ERR(priv, "flush request fail\n"); 1122 goto done; 1123 } 1124 } 1125 1126 IWL_DEBUG_TX_QUEUES(priv, "wait transmit/flush all frames\n"); 1127 iwl_trans_wait_tx_queues_empty(priv->trans, scd_queues); 1128 done: 1129 mutex_unlock(&priv->mutex); 1130 IWL_DEBUG_MAC80211(priv, "leave\n"); 1131 } 1132 1133 static void iwlagn_mac_event_callback(struct ieee80211_hw *hw, 1134 struct ieee80211_vif *vif, 1135 const struct ieee80211_event *event) 1136 { 1137 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1138 1139 if (event->type != RSSI_EVENT) 1140 return; 1141 1142 IWL_DEBUG_MAC80211(priv, "enter\n"); 1143 1144 if (priv->lib->bt_params && 1145 priv->lib->bt_params->advanced_bt_coexist) { 1146 if (event->u.rssi.data == RSSI_EVENT_LOW) 1147 priv->bt_enable_pspoll = true; 1148 else if (event->u.rssi.data == RSSI_EVENT_HIGH) 1149 priv->bt_enable_pspoll = false; 1150 1151 queue_work(priv->workqueue, &priv->bt_runtime_config); 1152 } else { 1153 IWL_DEBUG_MAC80211(priv, "Advanced BT coex disabled," 1154 "ignoring RSSI callback\n"); 1155 } 1156 1157 IWL_DEBUG_MAC80211(priv, "leave\n"); 1158 } 1159 1160 static int iwlagn_mac_set_tim(struct ieee80211_hw *hw, 1161 struct ieee80211_sta *sta, bool set) 1162 { 1163 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1164 1165 queue_work(priv->workqueue, &priv->beacon_update); 1166 1167 return 0; 1168 } 1169 1170 static int iwlagn_mac_conf_tx(struct ieee80211_hw *hw, 1171 struct ieee80211_vif *vif, u16 queue, 1172 const struct ieee80211_tx_queue_params *params) 1173 { 1174 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1175 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv; 1176 struct iwl_rxon_context *ctx = vif_priv->ctx; 1177 int q; 1178 1179 if (WARN_ON(!ctx)) 1180 return -EINVAL; 1181 1182 IWL_DEBUG_MAC80211(priv, "enter\n"); 1183 1184 if (!iwl_is_ready_rf(priv)) { 1185 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n"); 1186 return -EIO; 1187 } 1188 1189 if (queue >= AC_NUM) { 1190 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue); 1191 return 0; 1192 } 1193 1194 q = AC_NUM - 1 - queue; 1195 1196 mutex_lock(&priv->mutex); 1197 1198 ctx->qos_data.def_qos_parm.ac[q].cw_min = 1199 cpu_to_le16(params->cw_min); 1200 ctx->qos_data.def_qos_parm.ac[q].cw_max = 1201 cpu_to_le16(params->cw_max); 1202 ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs; 1203 ctx->qos_data.def_qos_parm.ac[q].edca_txop = 1204 cpu_to_le16((params->txop * 32)); 1205 1206 ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0; 1207 1208 mutex_unlock(&priv->mutex); 1209 1210 IWL_DEBUG_MAC80211(priv, "leave\n"); 1211 return 0; 1212 } 1213 1214 static int iwlagn_mac_tx_last_beacon(struct ieee80211_hw *hw) 1215 { 1216 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1217 1218 return priv->ibss_manager == IWL_IBSS_MANAGER; 1219 } 1220 1221 static int iwl_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx) 1222 { 1223 iwl_connection_init_rx_config(priv, ctx); 1224 1225 iwlagn_set_rxon_chain(priv, ctx); 1226 1227 return iwlagn_commit_rxon(priv, ctx); 1228 } 1229 1230 static int iwl_setup_interface(struct iwl_priv *priv, 1231 struct iwl_rxon_context *ctx) 1232 { 1233 struct ieee80211_vif *vif = ctx->vif; 1234 int err, ac; 1235 1236 lockdep_assert_held(&priv->mutex); 1237 1238 /* 1239 * This variable will be correct only when there's just 1240 * a single context, but all code using it is for hardware 1241 * that supports only one context. 1242 */ 1243 priv->iw_mode = vif->type; 1244 1245 ctx->is_active = true; 1246 1247 err = iwl_set_mode(priv, ctx); 1248 if (err) { 1249 if (!ctx->always_active) 1250 ctx->is_active = false; 1251 return err; 1252 } 1253 1254 if (priv->lib->bt_params && priv->lib->bt_params->advanced_bt_coexist && 1255 vif->type == NL80211_IFTYPE_ADHOC) { 1256 /* 1257 * pretend to have high BT traffic as long as we 1258 * are operating in IBSS mode, as this will cause 1259 * the rate scaling etc. to behave as intended. 1260 */ 1261 priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH; 1262 } 1263 1264 /* set up queue mappings */ 1265 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 1266 vif->hw_queue[ac] = ctx->ac_to_queue[ac]; 1267 1268 if (vif->type == NL80211_IFTYPE_AP) 1269 vif->cab_queue = ctx->mcast_queue; 1270 else 1271 vif->cab_queue = IEEE80211_INVAL_HW_QUEUE; 1272 1273 return 0; 1274 } 1275 1276 static int iwlagn_mac_add_interface(struct ieee80211_hw *hw, 1277 struct ieee80211_vif *vif) 1278 { 1279 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1280 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv; 1281 struct iwl_rxon_context *tmp, *ctx = NULL; 1282 int err; 1283 enum nl80211_iftype viftype = ieee80211_vif_type_p2p(vif); 1284 bool reset = false; 1285 1286 IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n", 1287 viftype, vif->addr); 1288 1289 mutex_lock(&priv->mutex); 1290 1291 if (!iwl_is_ready_rf(priv)) { 1292 IWL_WARN(priv, "Try to add interface when device not ready\n"); 1293 err = -EINVAL; 1294 goto out; 1295 } 1296 1297 for_each_context(priv, tmp) { 1298 u32 possible_modes = 1299 tmp->interface_modes | tmp->exclusive_interface_modes; 1300 1301 if (tmp->vif) { 1302 /* On reset we need to add the same interface again */ 1303 if (tmp->vif == vif) { 1304 reset = true; 1305 ctx = tmp; 1306 break; 1307 } 1308 1309 /* check if this busy context is exclusive */ 1310 if (tmp->exclusive_interface_modes & 1311 BIT(tmp->vif->type)) { 1312 err = -EINVAL; 1313 goto out; 1314 } 1315 continue; 1316 } 1317 1318 if (!(possible_modes & BIT(viftype))) 1319 continue; 1320 1321 /* have maybe usable context w/o interface */ 1322 ctx = tmp; 1323 break; 1324 } 1325 1326 if (!ctx) { 1327 err = -EOPNOTSUPP; 1328 goto out; 1329 } 1330 1331 vif_priv->ctx = ctx; 1332 ctx->vif = vif; 1333 1334 /* 1335 * In SNIFFER device type, the firmware reports the FCS to 1336 * the host, rather than snipping it off. Unfortunately, 1337 * mac80211 doesn't (yet) provide a per-packet flag for 1338 * this, so that we have to set the hardware flag based 1339 * on the interfaces added. As the monitor interface can 1340 * only be present by itself, and will be removed before 1341 * other interfaces are added, this is safe. 1342 */ 1343 if (vif->type == NL80211_IFTYPE_MONITOR) 1344 ieee80211_hw_set(priv->hw, RX_INCLUDES_FCS); 1345 else 1346 __clear_bit(IEEE80211_HW_RX_INCLUDES_FCS, priv->hw->flags); 1347 1348 err = iwl_setup_interface(priv, ctx); 1349 if (!err || reset) 1350 goto out; 1351 1352 ctx->vif = NULL; 1353 priv->iw_mode = NL80211_IFTYPE_STATION; 1354 out: 1355 mutex_unlock(&priv->mutex); 1356 1357 IWL_DEBUG_MAC80211(priv, "leave\n"); 1358 return err; 1359 } 1360 1361 static void iwl_teardown_interface(struct iwl_priv *priv, 1362 struct ieee80211_vif *vif, 1363 bool mode_change) 1364 { 1365 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif); 1366 1367 lockdep_assert_held(&priv->mutex); 1368 1369 if (priv->scan_vif == vif) { 1370 iwl_scan_cancel_timeout(priv, 200); 1371 iwl_force_scan_end(priv); 1372 } 1373 1374 if (!mode_change) { 1375 iwl_set_mode(priv, ctx); 1376 if (!ctx->always_active) 1377 ctx->is_active = false; 1378 } 1379 1380 /* 1381 * When removing the IBSS interface, overwrite the 1382 * BT traffic load with the stored one from the last 1383 * notification, if any. If this is a device that 1384 * doesn't implement this, this has no effect since 1385 * both values are the same and zero. 1386 */ 1387 if (vif->type == NL80211_IFTYPE_ADHOC) 1388 priv->bt_traffic_load = priv->last_bt_traffic_load; 1389 } 1390 1391 static void iwlagn_mac_remove_interface(struct ieee80211_hw *hw, 1392 struct ieee80211_vif *vif) 1393 { 1394 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1395 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif); 1396 1397 IWL_DEBUG_MAC80211(priv, "enter\n"); 1398 1399 mutex_lock(&priv->mutex); 1400 1401 WARN_ON(ctx->vif != vif); 1402 ctx->vif = NULL; 1403 1404 iwl_teardown_interface(priv, vif, false); 1405 1406 mutex_unlock(&priv->mutex); 1407 1408 IWL_DEBUG_MAC80211(priv, "leave\n"); 1409 1410 } 1411 1412 static int iwlagn_mac_change_interface(struct ieee80211_hw *hw, 1413 struct ieee80211_vif *vif, 1414 enum nl80211_iftype newtype, bool newp2p) 1415 { 1416 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1417 struct iwl_rxon_context *ctx, *tmp; 1418 enum nl80211_iftype newviftype = newtype; 1419 u32 interface_modes; 1420 int err; 1421 1422 IWL_DEBUG_MAC80211(priv, "enter\n"); 1423 1424 newtype = ieee80211_iftype_p2p(newtype, newp2p); 1425 1426 mutex_lock(&priv->mutex); 1427 1428 ctx = iwl_rxon_ctx_from_vif(vif); 1429 1430 /* 1431 * To simplify this code, only support changes on the 1432 * BSS context. The PAN context is usually reassigned 1433 * by creating/removing P2P interfaces anyway. 1434 */ 1435 if (ctx->ctxid != IWL_RXON_CTX_BSS) { 1436 err = -EBUSY; 1437 goto out; 1438 } 1439 1440 if (!ctx->vif || !iwl_is_ready_rf(priv)) { 1441 /* 1442 * Huh? But wait ... this can maybe happen when 1443 * we're in the middle of a firmware restart! 1444 */ 1445 err = -EBUSY; 1446 goto out; 1447 } 1448 1449 /* Check if the switch is supported in the same context */ 1450 interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes; 1451 if (!(interface_modes & BIT(newtype))) { 1452 err = -EBUSY; 1453 goto out; 1454 } 1455 1456 if (ctx->exclusive_interface_modes & BIT(newtype)) { 1457 for_each_context(priv, tmp) { 1458 if (ctx == tmp) 1459 continue; 1460 1461 if (!tmp->is_active) 1462 continue; 1463 1464 /* 1465 * The current mode switch would be exclusive, but 1466 * another context is active ... refuse the switch. 1467 */ 1468 err = -EBUSY; 1469 goto out; 1470 } 1471 } 1472 1473 /* success */ 1474 iwl_teardown_interface(priv, vif, true); 1475 vif->type = newviftype; 1476 vif->p2p = newp2p; 1477 err = iwl_setup_interface(priv, ctx); 1478 WARN_ON(err); 1479 /* 1480 * We've switched internally, but submitting to the 1481 * device may have failed for some reason. Mask this 1482 * error, because otherwise mac80211 will not switch 1483 * (and set the interface type back) and we'll be 1484 * out of sync with it. 1485 */ 1486 err = 0; 1487 1488 out: 1489 mutex_unlock(&priv->mutex); 1490 IWL_DEBUG_MAC80211(priv, "leave\n"); 1491 1492 return err; 1493 } 1494 1495 static int iwlagn_mac_hw_scan(struct ieee80211_hw *hw, 1496 struct ieee80211_vif *vif, 1497 struct ieee80211_scan_request *hw_req) 1498 { 1499 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1500 struct cfg80211_scan_request *req = &hw_req->req; 1501 int ret; 1502 1503 IWL_DEBUG_MAC80211(priv, "enter\n"); 1504 1505 if (req->n_channels == 0) 1506 return -EINVAL; 1507 1508 mutex_lock(&priv->mutex); 1509 1510 /* 1511 * If an internal scan is in progress, just set 1512 * up the scan_request as per above. 1513 */ 1514 if (priv->scan_type != IWL_SCAN_NORMAL) { 1515 IWL_DEBUG_SCAN(priv, 1516 "SCAN request during internal scan - defer\n"); 1517 priv->scan_request = req; 1518 priv->scan_vif = vif; 1519 ret = 0; 1520 } else { 1521 priv->scan_request = req; 1522 priv->scan_vif = vif; 1523 /* 1524 * mac80211 will only ask for one band at a time 1525 * so using channels[0] here is ok 1526 */ 1527 ret = iwl_scan_initiate(priv, vif, IWL_SCAN_NORMAL, 1528 req->channels[0]->band); 1529 if (ret) { 1530 priv->scan_request = NULL; 1531 priv->scan_vif = NULL; 1532 } 1533 } 1534 1535 IWL_DEBUG_MAC80211(priv, "leave\n"); 1536 1537 mutex_unlock(&priv->mutex); 1538 1539 return ret; 1540 } 1541 1542 static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id) 1543 { 1544 struct iwl_addsta_cmd cmd = { 1545 .mode = STA_CONTROL_MODIFY_MSK, 1546 .station_flags_msk = STA_FLG_PWR_SAVE_MSK, 1547 .sta.sta_id = sta_id, 1548 }; 1549 1550 iwl_send_add_sta(priv, &cmd, CMD_ASYNC); 1551 } 1552 1553 static void iwlagn_mac_sta_notify(struct ieee80211_hw *hw, 1554 struct ieee80211_vif *vif, 1555 enum sta_notify_cmd cmd, 1556 struct ieee80211_sta *sta) 1557 { 1558 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1559 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv; 1560 int sta_id; 1561 1562 IWL_DEBUG_MAC80211(priv, "enter\n"); 1563 1564 switch (cmd) { 1565 case STA_NOTIFY_SLEEP: 1566 WARN_ON(!sta_priv->client); 1567 sta_priv->asleep = true; 1568 if (atomic_read(&sta_priv->pending_frames) > 0) 1569 ieee80211_sta_block_awake(hw, sta, true); 1570 break; 1571 case STA_NOTIFY_AWAKE: 1572 WARN_ON(!sta_priv->client); 1573 if (!sta_priv->asleep) 1574 break; 1575 sta_priv->asleep = false; 1576 sta_id = iwl_sta_id(sta); 1577 if (sta_id != IWL_INVALID_STATION) 1578 iwl_sta_modify_ps_wake(priv, sta_id); 1579 break; 1580 default: 1581 break; 1582 } 1583 IWL_DEBUG_MAC80211(priv, "leave\n"); 1584 } 1585 1586 const struct ieee80211_ops iwlagn_hw_ops = { 1587 .tx = iwlagn_mac_tx, 1588 .start = iwlagn_mac_start, 1589 .stop = iwlagn_mac_stop, 1590 #ifdef CONFIG_PM_SLEEP 1591 .suspend = iwlagn_mac_suspend, 1592 .resume = iwlagn_mac_resume, 1593 .set_wakeup = iwlagn_mac_set_wakeup, 1594 #endif 1595 .add_interface = iwlagn_mac_add_interface, 1596 .remove_interface = iwlagn_mac_remove_interface, 1597 .change_interface = iwlagn_mac_change_interface, 1598 .config = iwlagn_mac_config, 1599 .configure_filter = iwlagn_configure_filter, 1600 .set_key = iwlagn_mac_set_key, 1601 .update_tkip_key = iwlagn_mac_update_tkip_key, 1602 .set_rekey_data = iwlagn_mac_set_rekey_data, 1603 .conf_tx = iwlagn_mac_conf_tx, 1604 .bss_info_changed = iwlagn_bss_info_changed, 1605 .ampdu_action = iwlagn_mac_ampdu_action, 1606 .hw_scan = iwlagn_mac_hw_scan, 1607 .sta_notify = iwlagn_mac_sta_notify, 1608 .sta_state = iwlagn_mac_sta_state, 1609 .channel_switch = iwlagn_mac_channel_switch, 1610 .flush = iwlagn_mac_flush, 1611 .tx_last_beacon = iwlagn_mac_tx_last_beacon, 1612 .event_callback = iwlagn_mac_event_callback, 1613 .set_tim = iwlagn_mac_set_tim, 1614 }; 1615 1616 /* This function both allocates and initializes hw and priv. */ 1617 struct ieee80211_hw *iwl_alloc_all(void) 1618 { 1619 struct iwl_priv *priv; 1620 struct iwl_op_mode *op_mode; 1621 /* mac80211 allocates memory for this device instance, including 1622 * space for this driver's private structure */ 1623 struct ieee80211_hw *hw; 1624 1625 hw = ieee80211_alloc_hw(sizeof(struct iwl_priv) + 1626 sizeof(struct iwl_op_mode), &iwlagn_hw_ops); 1627 if (!hw) 1628 goto out; 1629 1630 op_mode = hw->priv; 1631 priv = IWL_OP_MODE_GET_DVM(op_mode); 1632 priv->hw = hw; 1633 1634 out: 1635 return hw; 1636 } 1637