1 /****************************************************************************** 2 * 3 * Copyright(c) 2003 - 2014 Intel Corporation. All rights reserved. 4 * 5 * Portions of this file are derived from the ipw3945 project, as well 6 * as portions of the ieee80211 subsystem header files. 7 * 8 * This program is free software; you can redistribute it and/or modify it 9 * under the terms of version 2 of the GNU General Public License as 10 * published by the Free Software Foundation. 11 * 12 * This program is distributed in the hope that it will be useful, but WITHOUT 13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 15 * more details. 16 * 17 * The full GNU General Public License is included in this distribution in the 18 * file called LICENSE. 19 * 20 * Contact Information: 21 * Intel Linux Wireless <linuxwifi@intel.com> 22 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 23 * 24 *****************************************************************************/ 25 #include <linux/kernel.h> 26 #include <linux/module.h> 27 #include <linux/slab.h> 28 #include <linux/dma-mapping.h> 29 #include <linux/delay.h> 30 #include <linux/sched.h> 31 #include <linux/skbuff.h> 32 #include <linux/netdevice.h> 33 #include <linux/etherdevice.h> 34 #include <linux/if_arp.h> 35 36 #include <net/ieee80211_radiotap.h> 37 #include <net/mac80211.h> 38 39 #include <asm/div64.h> 40 41 #include "iwl-io.h" 42 #include "iwl-trans.h" 43 #include "iwl-op-mode.h" 44 #include "iwl-modparams.h" 45 46 #include "dev.h" 47 #include "calib.h" 48 #include "agn.h" 49 50 /***************************************************************************** 51 * 52 * mac80211 entry point functions 53 * 54 *****************************************************************************/ 55 56 static const struct ieee80211_iface_limit iwlagn_sta_ap_limits[] = { 57 { 58 .max = 1, 59 .types = BIT(NL80211_IFTYPE_STATION), 60 }, 61 { 62 .max = 1, 63 .types = BIT(NL80211_IFTYPE_AP), 64 }, 65 }; 66 67 static const struct ieee80211_iface_limit iwlagn_2sta_limits[] = { 68 { 69 .max = 2, 70 .types = BIT(NL80211_IFTYPE_STATION), 71 }, 72 }; 73 74 static const struct ieee80211_iface_combination 75 iwlagn_iface_combinations_dualmode[] = { 76 { .num_different_channels = 1, 77 .max_interfaces = 2, 78 .beacon_int_infra_match = true, 79 .limits = iwlagn_sta_ap_limits, 80 .n_limits = ARRAY_SIZE(iwlagn_sta_ap_limits), 81 }, 82 { .num_different_channels = 1, 83 .max_interfaces = 2, 84 .limits = iwlagn_2sta_limits, 85 .n_limits = ARRAY_SIZE(iwlagn_2sta_limits), 86 }, 87 }; 88 89 /* 90 * Not a mac80211 entry point function, but it fits in with all the 91 * other mac80211 functions grouped here. 92 */ 93 int iwlagn_mac_setup_register(struct iwl_priv *priv, 94 const struct iwl_ucode_capabilities *capa) 95 { 96 int ret; 97 struct ieee80211_hw *hw = priv->hw; 98 struct iwl_rxon_context *ctx; 99 100 hw->rate_control_algorithm = "iwl-agn-rs"; 101 102 /* Tell mac80211 our characteristics */ 103 ieee80211_hw_set(hw, SIGNAL_DBM); 104 ieee80211_hw_set(hw, AMPDU_AGGREGATION); 105 ieee80211_hw_set(hw, NEED_DTIM_BEFORE_ASSOC); 106 ieee80211_hw_set(hw, SPECTRUM_MGMT); 107 ieee80211_hw_set(hw, REPORTS_TX_ACK_STATUS); 108 ieee80211_hw_set(hw, QUEUE_CONTROL); 109 ieee80211_hw_set(hw, SUPPORTS_PS); 110 ieee80211_hw_set(hw, SUPPORTS_DYNAMIC_PS); 111 ieee80211_hw_set(hw, SUPPORT_FAST_XMIT); 112 ieee80211_hw_set(hw, WANT_MONITOR_VIF); 113 114 if (priv->trans->max_skb_frags) 115 hw->netdev_features = NETIF_F_HIGHDMA | NETIF_F_SG; 116 117 hw->offchannel_tx_hw_queue = IWL_AUX_QUEUE; 118 hw->radiotap_mcs_details |= IEEE80211_RADIOTAP_MCS_HAVE_FMT; 119 120 /* 121 * Including the following line will crash some AP's. This 122 * workaround removes the stimulus which causes the crash until 123 * the AP software can be fixed. 124 hw->max_tx_aggregation_subframes = LINK_QUAL_AGG_FRAME_LIMIT_DEF; 125 */ 126 127 if (priv->nvm_data->sku_cap_11n_enable) 128 hw->wiphy->features |= NL80211_FEATURE_DYNAMIC_SMPS | 129 NL80211_FEATURE_STATIC_SMPS; 130 131 /* 132 * Enable 11w if advertised by firmware and software crypto 133 * is not enabled (as the firmware will interpret some mgmt 134 * packets, so enabling it with software crypto isn't safe) 135 */ 136 if (priv->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_MFP && 137 !iwlwifi_mod_params.swcrypto) 138 ieee80211_hw_set(hw, MFP_CAPABLE); 139 140 hw->sta_data_size = sizeof(struct iwl_station_priv); 141 hw->vif_data_size = sizeof(struct iwl_vif_priv); 142 143 for_each_context(priv, ctx) { 144 hw->wiphy->interface_modes |= ctx->interface_modes; 145 hw->wiphy->interface_modes |= ctx->exclusive_interface_modes; 146 } 147 148 BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2); 149 150 if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) { 151 hw->wiphy->iface_combinations = 152 iwlagn_iface_combinations_dualmode; 153 hw->wiphy->n_iface_combinations = 154 ARRAY_SIZE(iwlagn_iface_combinations_dualmode); 155 } 156 157 hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN; 158 hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG | 159 REGULATORY_DISABLE_BEACON_HINTS; 160 161 #ifdef CONFIG_PM_SLEEP 162 if (priv->fw->img[IWL_UCODE_WOWLAN].num_sec && 163 priv->trans->ops->d3_suspend && 164 priv->trans->ops->d3_resume && 165 device_can_wakeup(priv->trans->dev)) { 166 priv->wowlan_support.flags = WIPHY_WOWLAN_MAGIC_PKT | 167 WIPHY_WOWLAN_DISCONNECT | 168 WIPHY_WOWLAN_EAP_IDENTITY_REQ | 169 WIPHY_WOWLAN_RFKILL_RELEASE; 170 if (!iwlwifi_mod_params.swcrypto) 171 priv->wowlan_support.flags |= 172 WIPHY_WOWLAN_SUPPORTS_GTK_REKEY | 173 WIPHY_WOWLAN_GTK_REKEY_FAILURE; 174 175 priv->wowlan_support.n_patterns = IWLAGN_WOWLAN_MAX_PATTERNS; 176 priv->wowlan_support.pattern_min_len = 177 IWLAGN_WOWLAN_MIN_PATTERN_LEN; 178 priv->wowlan_support.pattern_max_len = 179 IWLAGN_WOWLAN_MAX_PATTERN_LEN; 180 hw->wiphy->wowlan = &priv->wowlan_support; 181 } 182 #endif 183 184 if (iwlwifi_mod_params.power_save) 185 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT; 186 else 187 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT; 188 189 hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX; 190 /* we create the 802.11 header and a max-length SSID element */ 191 hw->wiphy->max_scan_ie_len = capa->max_probe_length - 24 - 34; 192 193 /* 194 * We don't use all queues: 4 and 9 are unused and any 195 * aggregation queue gets mapped down to the AC queue. 196 */ 197 hw->queues = IWLAGN_FIRST_AMPDU_QUEUE; 198 199 hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL; 200 201 if (priv->nvm_data->bands[NL80211_BAND_2GHZ].n_channels) 202 priv->hw->wiphy->bands[NL80211_BAND_2GHZ] = 203 &priv->nvm_data->bands[NL80211_BAND_2GHZ]; 204 if (priv->nvm_data->bands[NL80211_BAND_5GHZ].n_channels) 205 priv->hw->wiphy->bands[NL80211_BAND_5GHZ] = 206 &priv->nvm_data->bands[NL80211_BAND_5GHZ]; 207 208 hw->wiphy->hw_version = priv->trans->hw_id; 209 210 iwl_leds_init(priv); 211 212 wiphy_ext_feature_set(hw->wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST); 213 214 ret = ieee80211_register_hw(priv->hw); 215 if (ret) { 216 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret); 217 iwl_leds_exit(priv); 218 return ret; 219 } 220 priv->mac80211_registered = 1; 221 222 return 0; 223 } 224 225 void iwlagn_mac_unregister(struct iwl_priv *priv) 226 { 227 if (!priv->mac80211_registered) 228 return; 229 iwl_leds_exit(priv); 230 ieee80211_unregister_hw(priv->hw); 231 priv->mac80211_registered = 0; 232 } 233 234 static int __iwl_up(struct iwl_priv *priv) 235 { 236 struct iwl_rxon_context *ctx; 237 int ret; 238 239 lockdep_assert_held(&priv->mutex); 240 241 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) { 242 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n"); 243 return -EIO; 244 } 245 246 for_each_context(priv, ctx) { 247 ret = iwlagn_alloc_bcast_station(priv, ctx); 248 if (ret) { 249 iwl_dealloc_bcast_stations(priv); 250 return ret; 251 } 252 } 253 254 ret = iwl_trans_start_hw(priv->trans); 255 if (ret) { 256 IWL_ERR(priv, "Failed to start HW: %d\n", ret); 257 goto error; 258 } 259 260 ret = iwl_run_init_ucode(priv); 261 if (ret) { 262 IWL_ERR(priv, "Failed to run INIT ucode: %d\n", ret); 263 goto error; 264 } 265 266 ret = iwl_trans_start_hw(priv->trans); 267 if (ret) { 268 IWL_ERR(priv, "Failed to start HW: %d\n", ret); 269 goto error; 270 } 271 272 ret = iwl_load_ucode_wait_alive(priv, IWL_UCODE_REGULAR); 273 if (ret) { 274 IWL_ERR(priv, "Failed to start RT ucode: %d\n", ret); 275 goto error; 276 } 277 278 ret = iwl_alive_start(priv); 279 if (ret) 280 goto error; 281 return 0; 282 283 error: 284 set_bit(STATUS_EXIT_PENDING, &priv->status); 285 iwl_down(priv); 286 clear_bit(STATUS_EXIT_PENDING, &priv->status); 287 288 IWL_ERR(priv, "Unable to initialize device.\n"); 289 return ret; 290 } 291 292 static int iwlagn_mac_start(struct ieee80211_hw *hw) 293 { 294 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 295 int ret; 296 297 IWL_DEBUG_MAC80211(priv, "enter\n"); 298 299 /* we should be verifying the device is ready to be opened */ 300 mutex_lock(&priv->mutex); 301 ret = __iwl_up(priv); 302 mutex_unlock(&priv->mutex); 303 if (ret) 304 return ret; 305 306 IWL_DEBUG_INFO(priv, "Start UP work done.\n"); 307 308 /* Now we should be done, and the READY bit should be set. */ 309 if (WARN_ON(!test_bit(STATUS_READY, &priv->status))) 310 ret = -EIO; 311 312 iwlagn_led_enable(priv); 313 314 priv->is_open = 1; 315 IWL_DEBUG_MAC80211(priv, "leave\n"); 316 return 0; 317 } 318 319 static void iwlagn_mac_stop(struct ieee80211_hw *hw) 320 { 321 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 322 323 IWL_DEBUG_MAC80211(priv, "enter\n"); 324 325 if (!priv->is_open) 326 return; 327 328 priv->is_open = 0; 329 330 mutex_lock(&priv->mutex); 331 iwl_down(priv); 332 mutex_unlock(&priv->mutex); 333 334 iwl_cancel_deferred_work(priv); 335 336 flush_workqueue(priv->workqueue); 337 338 IWL_DEBUG_MAC80211(priv, "leave\n"); 339 } 340 341 static void iwlagn_mac_set_rekey_data(struct ieee80211_hw *hw, 342 struct ieee80211_vif *vif, 343 struct cfg80211_gtk_rekey_data *data) 344 { 345 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 346 347 if (iwlwifi_mod_params.swcrypto) 348 return; 349 350 IWL_DEBUG_MAC80211(priv, "enter\n"); 351 mutex_lock(&priv->mutex); 352 353 if (priv->contexts[IWL_RXON_CTX_BSS].vif != vif) 354 goto out; 355 356 memcpy(priv->kek, data->kek, NL80211_KEK_LEN); 357 memcpy(priv->kck, data->kck, NL80211_KCK_LEN); 358 priv->replay_ctr = 359 cpu_to_le64(be64_to_cpup((__be64 *)&data->replay_ctr)); 360 priv->have_rekey_data = true; 361 362 out: 363 mutex_unlock(&priv->mutex); 364 IWL_DEBUG_MAC80211(priv, "leave\n"); 365 } 366 367 #ifdef CONFIG_PM_SLEEP 368 369 static int iwlagn_mac_suspend(struct ieee80211_hw *hw, 370 struct cfg80211_wowlan *wowlan) 371 { 372 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 373 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS]; 374 int ret; 375 376 if (WARN_ON(!wowlan)) 377 return -EINVAL; 378 379 IWL_DEBUG_MAC80211(priv, "enter\n"); 380 mutex_lock(&priv->mutex); 381 382 /* Don't attempt WoWLAN when not associated, tear down instead. */ 383 if (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION || 384 !iwl_is_associated_ctx(ctx)) { 385 ret = 1; 386 goto out; 387 } 388 389 ret = iwlagn_suspend(priv, wowlan); 390 if (ret) 391 goto error; 392 393 /* let the ucode operate on its own */ 394 iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_SET, 395 CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE); 396 397 iwl_trans_d3_suspend(priv->trans, false, true); 398 399 goto out; 400 401 error: 402 priv->wowlan = false; 403 iwlagn_prepare_restart(priv); 404 ieee80211_restart_hw(priv->hw); 405 out: 406 mutex_unlock(&priv->mutex); 407 IWL_DEBUG_MAC80211(priv, "leave\n"); 408 409 return ret; 410 } 411 412 struct iwl_resume_data { 413 struct iwl_priv *priv; 414 struct iwlagn_wowlan_status *cmd; 415 bool valid; 416 }; 417 418 static bool iwl_resume_status_fn(struct iwl_notif_wait_data *notif_wait, 419 struct iwl_rx_packet *pkt, void *data) 420 { 421 struct iwl_resume_data *resume_data = data; 422 struct iwl_priv *priv = resume_data->priv; 423 424 if (iwl_rx_packet_payload_len(pkt) != sizeof(*resume_data->cmd)) { 425 IWL_ERR(priv, "rx wrong size data\n"); 426 return true; 427 } 428 memcpy(resume_data->cmd, pkt->data, sizeof(*resume_data->cmd)); 429 resume_data->valid = true; 430 431 return true; 432 } 433 434 static int iwlagn_mac_resume(struct ieee80211_hw *hw) 435 { 436 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 437 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS]; 438 struct ieee80211_vif *vif; 439 u32 base; 440 int ret; 441 enum iwl_d3_status d3_status; 442 struct error_table_start { 443 /* cf. struct iwl_error_event_table */ 444 u32 valid; 445 u32 error_id; 446 } err_info; 447 struct iwl_notification_wait status_wait; 448 static const u16 status_cmd[] = { 449 REPLY_WOWLAN_GET_STATUS, 450 }; 451 struct iwlagn_wowlan_status status_data = {}; 452 struct iwl_resume_data resume_data = { 453 .priv = priv, 454 .cmd = &status_data, 455 .valid = false, 456 }; 457 struct cfg80211_wowlan_wakeup wakeup = { 458 .pattern_idx = -1, 459 }; 460 #ifdef CONFIG_IWLWIFI_DEBUGFS 461 const struct fw_img *img; 462 #endif 463 464 IWL_DEBUG_MAC80211(priv, "enter\n"); 465 mutex_lock(&priv->mutex); 466 467 /* we'll clear ctx->vif during iwlagn_prepare_restart() */ 468 vif = ctx->vif; 469 470 ret = iwl_trans_d3_resume(priv->trans, &d3_status, false, true); 471 if (ret) 472 goto out_unlock; 473 474 if (d3_status != IWL_D3_STATUS_ALIVE) { 475 IWL_INFO(priv, "Device was reset during suspend\n"); 476 goto out_unlock; 477 } 478 479 /* uCode is no longer operating by itself */ 480 iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_CLR, 481 CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE); 482 483 base = priv->device_pointers.error_event_table; 484 if (!iwlagn_hw_valid_rtc_data_addr(base)) { 485 IWL_WARN(priv, "Invalid error table during resume!\n"); 486 goto out_unlock; 487 } 488 489 iwl_trans_read_mem_bytes(priv->trans, base, 490 &err_info, sizeof(err_info)); 491 492 if (err_info.valid) { 493 IWL_INFO(priv, "error table is valid (%d, 0x%x)\n", 494 err_info.valid, err_info.error_id); 495 if (err_info.error_id == RF_KILL_INDICATOR_FOR_WOWLAN) { 496 wakeup.rfkill_release = true; 497 ieee80211_report_wowlan_wakeup(vif, &wakeup, 498 GFP_KERNEL); 499 } 500 goto out_unlock; 501 } 502 503 #ifdef CONFIG_IWLWIFI_DEBUGFS 504 img = &priv->fw->img[IWL_UCODE_WOWLAN]; 505 if (!priv->wowlan_sram) 506 priv->wowlan_sram = 507 kzalloc(img->sec[IWL_UCODE_SECTION_DATA].len, 508 GFP_KERNEL); 509 510 if (priv->wowlan_sram) 511 iwl_trans_read_mem(priv->trans, 0x800000, 512 priv->wowlan_sram, 513 img->sec[IWL_UCODE_SECTION_DATA].len / 4); 514 #endif 515 516 /* 517 * This is very strange. The GET_STATUS command is sent but the device 518 * doesn't reply properly, it seems it doesn't close the RBD so one is 519 * always left open ... As a result, we need to send another command 520 * and have to reset the driver afterwards. As we need to switch to 521 * runtime firmware again that'll happen. 522 */ 523 524 iwl_init_notification_wait(&priv->notif_wait, &status_wait, status_cmd, 525 ARRAY_SIZE(status_cmd), iwl_resume_status_fn, 526 &resume_data); 527 528 iwl_dvm_send_cmd_pdu(priv, REPLY_WOWLAN_GET_STATUS, CMD_ASYNC, 0, NULL); 529 iwl_dvm_send_cmd_pdu(priv, REPLY_ECHO, CMD_ASYNC, 0, NULL); 530 /* an RBD is left open in the firmware now! */ 531 532 ret = iwl_wait_notification(&priv->notif_wait, &status_wait, HZ/5); 533 if (ret) 534 goto out_unlock; 535 536 if (resume_data.valid && priv->contexts[IWL_RXON_CTX_BSS].vif) { 537 u32 reasons = le32_to_cpu(status_data.wakeup_reason); 538 struct cfg80211_wowlan_wakeup *wakeup_report; 539 540 IWL_INFO(priv, "WoWLAN wakeup reason(s): 0x%.8x\n", reasons); 541 542 if (reasons) { 543 if (reasons & IWLAGN_WOWLAN_WAKEUP_MAGIC_PACKET) 544 wakeup.magic_pkt = true; 545 if (reasons & IWLAGN_WOWLAN_WAKEUP_PATTERN_MATCH) 546 wakeup.pattern_idx = status_data.pattern_number; 547 if (reasons & (IWLAGN_WOWLAN_WAKEUP_BEACON_MISS | 548 IWLAGN_WOWLAN_WAKEUP_LINK_CHANGE)) 549 wakeup.disconnect = true; 550 if (reasons & IWLAGN_WOWLAN_WAKEUP_GTK_REKEY_FAIL) 551 wakeup.gtk_rekey_failure = true; 552 if (reasons & IWLAGN_WOWLAN_WAKEUP_EAP_IDENT_REQ) 553 wakeup.eap_identity_req = true; 554 if (reasons & IWLAGN_WOWLAN_WAKEUP_4WAY_HANDSHAKE) 555 wakeup.four_way_handshake = true; 556 wakeup_report = &wakeup; 557 } else { 558 wakeup_report = NULL; 559 } 560 561 ieee80211_report_wowlan_wakeup(vif, wakeup_report, GFP_KERNEL); 562 } 563 564 priv->wowlan = false; 565 566 iwlagn_prepare_restart(priv); 567 568 memset((void *)&ctx->active, 0, sizeof(ctx->active)); 569 iwl_connection_init_rx_config(priv, ctx); 570 iwlagn_set_rxon_chain(priv, ctx); 571 572 out_unlock: 573 mutex_unlock(&priv->mutex); 574 IWL_DEBUG_MAC80211(priv, "leave\n"); 575 576 ieee80211_resume_disconnect(vif); 577 578 return 1; 579 } 580 581 static void iwlagn_mac_set_wakeup(struct ieee80211_hw *hw, bool enabled) 582 { 583 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 584 585 device_set_wakeup_enable(priv->trans->dev, enabled); 586 } 587 #endif 588 589 static void iwlagn_mac_tx(struct ieee80211_hw *hw, 590 struct ieee80211_tx_control *control, 591 struct sk_buff *skb) 592 { 593 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 594 595 if (iwlagn_tx_skb(priv, control->sta, skb)) 596 ieee80211_free_txskb(hw, skb); 597 } 598 599 static void iwlagn_mac_update_tkip_key(struct ieee80211_hw *hw, 600 struct ieee80211_vif *vif, 601 struct ieee80211_key_conf *keyconf, 602 struct ieee80211_sta *sta, 603 u32 iv32, u16 *phase1key) 604 { 605 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 606 607 iwl_update_tkip_key(priv, vif, keyconf, sta, iv32, phase1key); 608 } 609 610 static int iwlagn_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd, 611 struct ieee80211_vif *vif, 612 struct ieee80211_sta *sta, 613 struct ieee80211_key_conf *key) 614 { 615 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 616 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv; 617 struct iwl_rxon_context *ctx = vif_priv->ctx; 618 int ret; 619 bool is_default_wep_key = false; 620 621 IWL_DEBUG_MAC80211(priv, "enter\n"); 622 623 if (iwlwifi_mod_params.swcrypto) { 624 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n"); 625 return -EOPNOTSUPP; 626 } 627 628 switch (key->cipher) { 629 case WLAN_CIPHER_SUITE_TKIP: 630 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC; 631 /* fall through */ 632 case WLAN_CIPHER_SUITE_CCMP: 633 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV; 634 break; 635 default: 636 break; 637 } 638 639 /* 640 * We could program these keys into the hardware as well, but we 641 * don't expect much multicast traffic in IBSS and having keys 642 * for more stations is probably more useful. 643 * 644 * Mark key TX-only and return 0. 645 */ 646 if (vif->type == NL80211_IFTYPE_ADHOC && 647 !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) { 648 key->hw_key_idx = WEP_INVALID_OFFSET; 649 return 0; 650 } 651 652 /* If they key was TX-only, accept deletion */ 653 if (cmd == DISABLE_KEY && key->hw_key_idx == WEP_INVALID_OFFSET) 654 return 0; 655 656 mutex_lock(&priv->mutex); 657 iwl_scan_cancel_timeout(priv, 100); 658 659 BUILD_BUG_ON(WEP_INVALID_OFFSET == IWLAGN_HW_KEY_DEFAULT); 660 661 /* 662 * If we are getting WEP group key and we didn't receive any key mapping 663 * so far, we are in legacy wep mode (group key only), otherwise we are 664 * in 1X mode. 665 * In legacy wep mode, we use another host command to the uCode. 666 */ 667 if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 || 668 key->cipher == WLAN_CIPHER_SUITE_WEP104) && !sta) { 669 if (cmd == SET_KEY) 670 is_default_wep_key = !ctx->key_mapping_keys; 671 else 672 is_default_wep_key = 673 key->hw_key_idx == IWLAGN_HW_KEY_DEFAULT; 674 } 675 676 677 switch (cmd) { 678 case SET_KEY: 679 if (is_default_wep_key) { 680 ret = iwl_set_default_wep_key(priv, vif_priv->ctx, key); 681 break; 682 } 683 ret = iwl_set_dynamic_key(priv, vif_priv->ctx, key, sta); 684 if (ret) { 685 /* 686 * can't add key for RX, but we don't need it 687 * in the device for TX so still return 0 688 */ 689 ret = 0; 690 key->hw_key_idx = WEP_INVALID_OFFSET; 691 } 692 693 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n"); 694 break; 695 case DISABLE_KEY: 696 if (is_default_wep_key) 697 ret = iwl_remove_default_wep_key(priv, ctx, key); 698 else 699 ret = iwl_remove_dynamic_key(priv, ctx, key, sta); 700 701 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n"); 702 break; 703 default: 704 ret = -EINVAL; 705 } 706 707 mutex_unlock(&priv->mutex); 708 IWL_DEBUG_MAC80211(priv, "leave\n"); 709 710 return ret; 711 } 712 713 static inline bool iwl_enable_rx_ampdu(const struct iwl_cfg *cfg) 714 { 715 if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG) 716 return false; 717 return true; 718 } 719 720 static inline bool iwl_enable_tx_ampdu(const struct iwl_cfg *cfg) 721 { 722 if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG) 723 return false; 724 if (iwlwifi_mod_params.disable_11n & IWL_ENABLE_HT_TXAGG) 725 return true; 726 727 /* disabled by default */ 728 return false; 729 } 730 731 static int iwlagn_mac_ampdu_action(struct ieee80211_hw *hw, 732 struct ieee80211_vif *vif, 733 struct ieee80211_ampdu_params *params) 734 { 735 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 736 int ret = -EINVAL; 737 struct ieee80211_sta *sta = params->sta; 738 enum ieee80211_ampdu_mlme_action action = params->action; 739 u16 tid = params->tid; 740 u16 *ssn = ¶ms->ssn; 741 u8 buf_size = params->buf_size; 742 struct iwl_station_priv *sta_priv = (void *) sta->drv_priv; 743 744 IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n", 745 sta->addr, tid); 746 747 if (!(priv->nvm_data->sku_cap_11n_enable)) 748 return -EACCES; 749 750 IWL_DEBUG_MAC80211(priv, "enter\n"); 751 mutex_lock(&priv->mutex); 752 753 switch (action) { 754 case IEEE80211_AMPDU_RX_START: 755 if (!iwl_enable_rx_ampdu(priv->cfg)) 756 break; 757 IWL_DEBUG_HT(priv, "start Rx\n"); 758 ret = iwl_sta_rx_agg_start(priv, sta, tid, *ssn); 759 break; 760 case IEEE80211_AMPDU_RX_STOP: 761 IWL_DEBUG_HT(priv, "stop Rx\n"); 762 ret = iwl_sta_rx_agg_stop(priv, sta, tid); 763 break; 764 case IEEE80211_AMPDU_TX_START: 765 if (!priv->trans->ops->txq_enable) 766 break; 767 if (!iwl_enable_tx_ampdu(priv->cfg)) 768 break; 769 IWL_DEBUG_HT(priv, "start Tx\n"); 770 ret = iwlagn_tx_agg_start(priv, vif, sta, tid, ssn); 771 break; 772 case IEEE80211_AMPDU_TX_STOP_FLUSH: 773 case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT: 774 IWL_DEBUG_HT(priv, "Flush Tx\n"); 775 ret = iwlagn_tx_agg_flush(priv, vif, sta, tid); 776 break; 777 case IEEE80211_AMPDU_TX_STOP_CONT: 778 IWL_DEBUG_HT(priv, "stop Tx\n"); 779 ret = iwlagn_tx_agg_stop(priv, vif, sta, tid); 780 if ((ret == 0) && (priv->agg_tids_count > 0)) { 781 priv->agg_tids_count--; 782 IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n", 783 priv->agg_tids_count); 784 } 785 if (!priv->agg_tids_count && 786 priv->hw_params.use_rts_for_aggregation) { 787 /* 788 * switch off RTS/CTS if it was previously enabled 789 */ 790 sta_priv->lq_sta.lq.general_params.flags &= 791 ~LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK; 792 iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif), 793 &sta_priv->lq_sta.lq, CMD_ASYNC, false); 794 } 795 break; 796 case IEEE80211_AMPDU_TX_OPERATIONAL: 797 ret = iwlagn_tx_agg_oper(priv, vif, sta, tid, buf_size); 798 break; 799 } 800 mutex_unlock(&priv->mutex); 801 IWL_DEBUG_MAC80211(priv, "leave\n"); 802 return ret; 803 } 804 805 static int iwlagn_mac_sta_add(struct ieee80211_hw *hw, 806 struct ieee80211_vif *vif, 807 struct ieee80211_sta *sta) 808 { 809 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 810 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv; 811 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv; 812 bool is_ap = vif->type == NL80211_IFTYPE_STATION; 813 int ret; 814 u8 sta_id; 815 816 IWL_DEBUG_INFO(priv, "proceeding to add station %pM\n", 817 sta->addr); 818 sta_priv->sta_id = IWL_INVALID_STATION; 819 820 atomic_set(&sta_priv->pending_frames, 0); 821 if (vif->type == NL80211_IFTYPE_AP) 822 sta_priv->client = true; 823 824 ret = iwl_add_station_common(priv, vif_priv->ctx, sta->addr, 825 is_ap, sta, &sta_id); 826 if (ret) { 827 IWL_ERR(priv, "Unable to add station %pM (%d)\n", 828 sta->addr, ret); 829 /* Should we return success if return code is EEXIST ? */ 830 return ret; 831 } 832 833 sta_priv->sta_id = sta_id; 834 835 return 0; 836 } 837 838 static int iwlagn_mac_sta_remove(struct ieee80211_hw *hw, 839 struct ieee80211_vif *vif, 840 struct ieee80211_sta *sta) 841 { 842 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 843 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv; 844 int ret; 845 846 IWL_DEBUG_INFO(priv, "proceeding to remove station %pM\n", sta->addr); 847 848 if (vif->type == NL80211_IFTYPE_STATION) { 849 /* 850 * Station will be removed from device when the RXON 851 * is set to unassociated -- just deactivate it here 852 * to avoid re-programming it. 853 */ 854 ret = 0; 855 iwl_deactivate_station(priv, sta_priv->sta_id, sta->addr); 856 } else { 857 ret = iwl_remove_station(priv, sta_priv->sta_id, sta->addr); 858 if (ret) 859 IWL_DEBUG_QUIET_RFKILL(priv, 860 "Error removing station %pM\n", sta->addr); 861 } 862 return ret; 863 } 864 865 static int iwlagn_mac_sta_state(struct ieee80211_hw *hw, 866 struct ieee80211_vif *vif, 867 struct ieee80211_sta *sta, 868 enum ieee80211_sta_state old_state, 869 enum ieee80211_sta_state new_state) 870 { 871 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 872 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv; 873 enum { 874 NONE, ADD, REMOVE, HT_RATE_INIT, ADD_RATE_INIT, 875 } op = NONE; 876 int ret; 877 878 IWL_DEBUG_MAC80211(priv, "station %pM state change %d->%d\n", 879 sta->addr, old_state, new_state); 880 881 mutex_lock(&priv->mutex); 882 if (vif->type == NL80211_IFTYPE_STATION) { 883 if (old_state == IEEE80211_STA_NOTEXIST && 884 new_state == IEEE80211_STA_NONE) 885 op = ADD; 886 else if (old_state == IEEE80211_STA_NONE && 887 new_state == IEEE80211_STA_NOTEXIST) 888 op = REMOVE; 889 else if (old_state == IEEE80211_STA_AUTH && 890 new_state == IEEE80211_STA_ASSOC) 891 op = HT_RATE_INIT; 892 } else { 893 if (old_state == IEEE80211_STA_AUTH && 894 new_state == IEEE80211_STA_ASSOC) 895 op = ADD_RATE_INIT; 896 else if (old_state == IEEE80211_STA_ASSOC && 897 new_state == IEEE80211_STA_AUTH) 898 op = REMOVE; 899 } 900 901 switch (op) { 902 case ADD: 903 ret = iwlagn_mac_sta_add(hw, vif, sta); 904 if (ret) 905 break; 906 /* 907 * Clear the in-progress flag, the AP station entry was added 908 * but we'll initialize LQ only when we've associated (which 909 * would also clear the in-progress flag). This is necessary 910 * in case we never initialize LQ because association fails. 911 */ 912 spin_lock_bh(&priv->sta_lock); 913 priv->stations[iwl_sta_id(sta)].used &= 914 ~IWL_STA_UCODE_INPROGRESS; 915 spin_unlock_bh(&priv->sta_lock); 916 break; 917 case REMOVE: 918 ret = iwlagn_mac_sta_remove(hw, vif, sta); 919 break; 920 case ADD_RATE_INIT: 921 ret = iwlagn_mac_sta_add(hw, vif, sta); 922 if (ret) 923 break; 924 /* Initialize rate scaling */ 925 IWL_DEBUG_INFO(priv, 926 "Initializing rate scaling for station %pM\n", 927 sta->addr); 928 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta)); 929 ret = 0; 930 break; 931 case HT_RATE_INIT: 932 /* Initialize rate scaling */ 933 ret = iwl_sta_update_ht(priv, vif_priv->ctx, sta); 934 if (ret) 935 break; 936 IWL_DEBUG_INFO(priv, 937 "Initializing rate scaling for station %pM\n", 938 sta->addr); 939 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta)); 940 ret = 0; 941 break; 942 default: 943 ret = 0; 944 break; 945 } 946 947 /* 948 * mac80211 might WARN if we fail, but due the way we 949 * (badly) handle hard rfkill, we might fail here 950 */ 951 if (iwl_is_rfkill(priv)) 952 ret = 0; 953 954 mutex_unlock(&priv->mutex); 955 IWL_DEBUG_MAC80211(priv, "leave\n"); 956 957 return ret; 958 } 959 960 static void iwlagn_mac_channel_switch(struct ieee80211_hw *hw, 961 struct ieee80211_vif *vif, 962 struct ieee80211_channel_switch *ch_switch) 963 { 964 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 965 struct ieee80211_conf *conf = &hw->conf; 966 struct ieee80211_channel *channel = ch_switch->chandef.chan; 967 struct iwl_ht_config *ht_conf = &priv->current_ht_config; 968 /* 969 * MULTI-FIXME 970 * When we add support for multiple interfaces, we need to 971 * revisit this. The channel switch command in the device 972 * only affects the BSS context, but what does that really 973 * mean? And what if we get a CSA on the second interface? 974 * This needs a lot of work. 975 */ 976 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS]; 977 u16 ch; 978 979 IWL_DEBUG_MAC80211(priv, "enter\n"); 980 981 mutex_lock(&priv->mutex); 982 983 if (iwl_is_rfkill(priv)) 984 goto out; 985 986 if (test_bit(STATUS_EXIT_PENDING, &priv->status) || 987 test_bit(STATUS_SCANNING, &priv->status) || 988 test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status)) 989 goto out; 990 991 if (!iwl_is_associated_ctx(ctx)) 992 goto out; 993 994 if (!priv->lib->set_channel_switch) 995 goto out; 996 997 ch = channel->hw_value; 998 if (le16_to_cpu(ctx->active.channel) == ch) 999 goto out; 1000 1001 priv->current_ht_config.smps = conf->smps_mode; 1002 1003 /* Configure HT40 channels */ 1004 switch (cfg80211_get_chandef_type(&ch_switch->chandef)) { 1005 case NL80211_CHAN_NO_HT: 1006 case NL80211_CHAN_HT20: 1007 ctx->ht.is_40mhz = false; 1008 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE; 1009 break; 1010 case NL80211_CHAN_HT40MINUS: 1011 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_BELOW; 1012 ctx->ht.is_40mhz = true; 1013 break; 1014 case NL80211_CHAN_HT40PLUS: 1015 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_ABOVE; 1016 ctx->ht.is_40mhz = true; 1017 break; 1018 } 1019 1020 if ((le16_to_cpu(ctx->staging.channel) != ch)) 1021 ctx->staging.flags = 0; 1022 1023 iwl_set_rxon_channel(priv, channel, ctx); 1024 iwl_set_rxon_ht(priv, ht_conf); 1025 iwl_set_flags_for_band(priv, ctx, channel->band, ctx->vif); 1026 1027 /* 1028 * at this point, staging_rxon has the 1029 * configuration for channel switch 1030 */ 1031 set_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status); 1032 priv->switch_channel = cpu_to_le16(ch); 1033 if (priv->lib->set_channel_switch(priv, ch_switch)) { 1034 clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status); 1035 priv->switch_channel = 0; 1036 ieee80211_chswitch_done(ctx->vif, false); 1037 } 1038 1039 out: 1040 mutex_unlock(&priv->mutex); 1041 IWL_DEBUG_MAC80211(priv, "leave\n"); 1042 } 1043 1044 void iwl_chswitch_done(struct iwl_priv *priv, bool is_success) 1045 { 1046 /* 1047 * MULTI-FIXME 1048 * See iwlagn_mac_channel_switch. 1049 */ 1050 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS]; 1051 1052 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) 1053 return; 1054 1055 if (!test_and_clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status)) 1056 return; 1057 1058 if (ctx->vif) 1059 ieee80211_chswitch_done(ctx->vif, is_success); 1060 } 1061 1062 static void iwlagn_configure_filter(struct ieee80211_hw *hw, 1063 unsigned int changed_flags, 1064 unsigned int *total_flags, 1065 u64 multicast) 1066 { 1067 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1068 __le32 filter_or = 0, filter_nand = 0; 1069 struct iwl_rxon_context *ctx; 1070 1071 #define CHK(test, flag) do { \ 1072 if (*total_flags & (test)) \ 1073 filter_or |= (flag); \ 1074 else \ 1075 filter_nand |= (flag); \ 1076 } while (0) 1077 1078 IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n", 1079 changed_flags, *total_flags); 1080 1081 CHK(FIF_OTHER_BSS, RXON_FILTER_PROMISC_MSK); 1082 /* Setting _just_ RXON_FILTER_CTL2HOST_MSK causes FH errors */ 1083 CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_PROMISC_MSK); 1084 CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK); 1085 1086 #undef CHK 1087 1088 mutex_lock(&priv->mutex); 1089 1090 for_each_context(priv, ctx) { 1091 ctx->staging.filter_flags &= ~filter_nand; 1092 ctx->staging.filter_flags |= filter_or; 1093 1094 /* 1095 * Not committing directly because hardware can perform a scan, 1096 * but we'll eventually commit the filter flags change anyway. 1097 */ 1098 } 1099 1100 mutex_unlock(&priv->mutex); 1101 1102 /* 1103 * Receiving all multicast frames is always enabled by the 1104 * default flags setup in iwl_connection_init_rx_config() 1105 * since we currently do not support programming multicast 1106 * filters into the device. 1107 */ 1108 *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | 1109 FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL; 1110 } 1111 1112 static void iwlagn_mac_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 1113 u32 queues, bool drop) 1114 { 1115 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1116 u32 scd_queues; 1117 1118 mutex_lock(&priv->mutex); 1119 IWL_DEBUG_MAC80211(priv, "enter\n"); 1120 1121 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) { 1122 IWL_DEBUG_TX(priv, "Aborting flush due to device shutdown\n"); 1123 goto done; 1124 } 1125 if (iwl_is_rfkill(priv)) { 1126 IWL_DEBUG_TX(priv, "Aborting flush due to RF Kill\n"); 1127 goto done; 1128 } 1129 1130 scd_queues = BIT(priv->cfg->base_params->num_of_queues) - 1; 1131 scd_queues &= ~(BIT(IWL_IPAN_CMD_QUEUE_NUM) | 1132 BIT(IWL_DEFAULT_CMD_QUEUE_NUM)); 1133 1134 if (drop) { 1135 IWL_DEBUG_TX_QUEUES(priv, "Flushing SCD queues: 0x%x\n", 1136 scd_queues); 1137 if (iwlagn_txfifo_flush(priv, scd_queues)) { 1138 IWL_ERR(priv, "flush request fail\n"); 1139 goto done; 1140 } 1141 } 1142 1143 IWL_DEBUG_TX_QUEUES(priv, "wait transmit/flush all frames\n"); 1144 iwl_trans_wait_tx_queues_empty(priv->trans, scd_queues); 1145 done: 1146 mutex_unlock(&priv->mutex); 1147 IWL_DEBUG_MAC80211(priv, "leave\n"); 1148 } 1149 1150 static void iwlagn_mac_event_callback(struct ieee80211_hw *hw, 1151 struct ieee80211_vif *vif, 1152 const struct ieee80211_event *event) 1153 { 1154 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1155 1156 if (event->type != RSSI_EVENT) 1157 return; 1158 1159 IWL_DEBUG_MAC80211(priv, "enter\n"); 1160 1161 if (priv->lib->bt_params && 1162 priv->lib->bt_params->advanced_bt_coexist) { 1163 if (event->u.rssi.data == RSSI_EVENT_LOW) 1164 priv->bt_enable_pspoll = true; 1165 else if (event->u.rssi.data == RSSI_EVENT_HIGH) 1166 priv->bt_enable_pspoll = false; 1167 1168 queue_work(priv->workqueue, &priv->bt_runtime_config); 1169 } else { 1170 IWL_DEBUG_MAC80211(priv, "Advanced BT coex disabled," 1171 "ignoring RSSI callback\n"); 1172 } 1173 1174 IWL_DEBUG_MAC80211(priv, "leave\n"); 1175 } 1176 1177 static int iwlagn_mac_set_tim(struct ieee80211_hw *hw, 1178 struct ieee80211_sta *sta, bool set) 1179 { 1180 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1181 1182 queue_work(priv->workqueue, &priv->beacon_update); 1183 1184 return 0; 1185 } 1186 1187 static int iwlagn_mac_conf_tx(struct ieee80211_hw *hw, 1188 struct ieee80211_vif *vif, u16 queue, 1189 const struct ieee80211_tx_queue_params *params) 1190 { 1191 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1192 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv; 1193 struct iwl_rxon_context *ctx = vif_priv->ctx; 1194 int q; 1195 1196 if (WARN_ON(!ctx)) 1197 return -EINVAL; 1198 1199 IWL_DEBUG_MAC80211(priv, "enter\n"); 1200 1201 if (!iwl_is_ready_rf(priv)) { 1202 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n"); 1203 return -EIO; 1204 } 1205 1206 if (queue >= AC_NUM) { 1207 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue); 1208 return 0; 1209 } 1210 1211 q = AC_NUM - 1 - queue; 1212 1213 mutex_lock(&priv->mutex); 1214 1215 ctx->qos_data.def_qos_parm.ac[q].cw_min = 1216 cpu_to_le16(params->cw_min); 1217 ctx->qos_data.def_qos_parm.ac[q].cw_max = 1218 cpu_to_le16(params->cw_max); 1219 ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs; 1220 ctx->qos_data.def_qos_parm.ac[q].edca_txop = 1221 cpu_to_le16((params->txop * 32)); 1222 1223 ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0; 1224 1225 mutex_unlock(&priv->mutex); 1226 1227 IWL_DEBUG_MAC80211(priv, "leave\n"); 1228 return 0; 1229 } 1230 1231 static int iwlagn_mac_tx_last_beacon(struct ieee80211_hw *hw) 1232 { 1233 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1234 1235 return priv->ibss_manager == IWL_IBSS_MANAGER; 1236 } 1237 1238 static int iwl_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx) 1239 { 1240 iwl_connection_init_rx_config(priv, ctx); 1241 1242 iwlagn_set_rxon_chain(priv, ctx); 1243 1244 return iwlagn_commit_rxon(priv, ctx); 1245 } 1246 1247 static int iwl_setup_interface(struct iwl_priv *priv, 1248 struct iwl_rxon_context *ctx) 1249 { 1250 struct ieee80211_vif *vif = ctx->vif; 1251 int err, ac; 1252 1253 lockdep_assert_held(&priv->mutex); 1254 1255 /* 1256 * This variable will be correct only when there's just 1257 * a single context, but all code using it is for hardware 1258 * that supports only one context. 1259 */ 1260 priv->iw_mode = vif->type; 1261 1262 ctx->is_active = true; 1263 1264 err = iwl_set_mode(priv, ctx); 1265 if (err) { 1266 if (!ctx->always_active) 1267 ctx->is_active = false; 1268 return err; 1269 } 1270 1271 if (priv->lib->bt_params && priv->lib->bt_params->advanced_bt_coexist && 1272 vif->type == NL80211_IFTYPE_ADHOC) { 1273 /* 1274 * pretend to have high BT traffic as long as we 1275 * are operating in IBSS mode, as this will cause 1276 * the rate scaling etc. to behave as intended. 1277 */ 1278 priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH; 1279 } 1280 1281 /* set up queue mappings */ 1282 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 1283 vif->hw_queue[ac] = ctx->ac_to_queue[ac]; 1284 1285 if (vif->type == NL80211_IFTYPE_AP) 1286 vif->cab_queue = ctx->mcast_queue; 1287 else 1288 vif->cab_queue = IEEE80211_INVAL_HW_QUEUE; 1289 1290 return 0; 1291 } 1292 1293 static int iwlagn_mac_add_interface(struct ieee80211_hw *hw, 1294 struct ieee80211_vif *vif) 1295 { 1296 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1297 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv; 1298 struct iwl_rxon_context *tmp, *ctx = NULL; 1299 int err; 1300 enum nl80211_iftype viftype = ieee80211_vif_type_p2p(vif); 1301 bool reset = false; 1302 1303 IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n", 1304 viftype, vif->addr); 1305 1306 mutex_lock(&priv->mutex); 1307 1308 if (!iwl_is_ready_rf(priv)) { 1309 IWL_WARN(priv, "Try to add interface when device not ready\n"); 1310 err = -EINVAL; 1311 goto out; 1312 } 1313 1314 for_each_context(priv, tmp) { 1315 u32 possible_modes = 1316 tmp->interface_modes | tmp->exclusive_interface_modes; 1317 1318 if (tmp->vif) { 1319 /* On reset we need to add the same interface again */ 1320 if (tmp->vif == vif) { 1321 reset = true; 1322 ctx = tmp; 1323 break; 1324 } 1325 1326 /* check if this busy context is exclusive */ 1327 if (tmp->exclusive_interface_modes & 1328 BIT(tmp->vif->type)) { 1329 err = -EINVAL; 1330 goto out; 1331 } 1332 continue; 1333 } 1334 1335 if (!(possible_modes & BIT(viftype))) 1336 continue; 1337 1338 /* have maybe usable context w/o interface */ 1339 ctx = tmp; 1340 break; 1341 } 1342 1343 if (!ctx) { 1344 err = -EOPNOTSUPP; 1345 goto out; 1346 } 1347 1348 vif_priv->ctx = ctx; 1349 ctx->vif = vif; 1350 1351 /* 1352 * In SNIFFER device type, the firmware reports the FCS to 1353 * the host, rather than snipping it off. Unfortunately, 1354 * mac80211 doesn't (yet) provide a per-packet flag for 1355 * this, so that we have to set the hardware flag based 1356 * on the interfaces added. As the monitor interface can 1357 * only be present by itself, and will be removed before 1358 * other interfaces are added, this is safe. 1359 */ 1360 if (vif->type == NL80211_IFTYPE_MONITOR) 1361 ieee80211_hw_set(priv->hw, RX_INCLUDES_FCS); 1362 else 1363 __clear_bit(IEEE80211_HW_RX_INCLUDES_FCS, priv->hw->flags); 1364 1365 err = iwl_setup_interface(priv, ctx); 1366 if (!err || reset) 1367 goto out; 1368 1369 ctx->vif = NULL; 1370 priv->iw_mode = NL80211_IFTYPE_STATION; 1371 out: 1372 mutex_unlock(&priv->mutex); 1373 1374 IWL_DEBUG_MAC80211(priv, "leave\n"); 1375 return err; 1376 } 1377 1378 static void iwl_teardown_interface(struct iwl_priv *priv, 1379 struct ieee80211_vif *vif, 1380 bool mode_change) 1381 { 1382 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif); 1383 1384 lockdep_assert_held(&priv->mutex); 1385 1386 if (priv->scan_vif == vif) { 1387 iwl_scan_cancel_timeout(priv, 200); 1388 iwl_force_scan_end(priv); 1389 } 1390 1391 if (!mode_change) { 1392 iwl_set_mode(priv, ctx); 1393 if (!ctx->always_active) 1394 ctx->is_active = false; 1395 } 1396 1397 /* 1398 * When removing the IBSS interface, overwrite the 1399 * BT traffic load with the stored one from the last 1400 * notification, if any. If this is a device that 1401 * doesn't implement this, this has no effect since 1402 * both values are the same and zero. 1403 */ 1404 if (vif->type == NL80211_IFTYPE_ADHOC) 1405 priv->bt_traffic_load = priv->last_bt_traffic_load; 1406 } 1407 1408 static void iwlagn_mac_remove_interface(struct ieee80211_hw *hw, 1409 struct ieee80211_vif *vif) 1410 { 1411 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1412 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif); 1413 1414 IWL_DEBUG_MAC80211(priv, "enter\n"); 1415 1416 mutex_lock(&priv->mutex); 1417 1418 WARN_ON(ctx->vif != vif); 1419 ctx->vif = NULL; 1420 1421 iwl_teardown_interface(priv, vif, false); 1422 1423 mutex_unlock(&priv->mutex); 1424 1425 IWL_DEBUG_MAC80211(priv, "leave\n"); 1426 1427 } 1428 1429 static int iwlagn_mac_change_interface(struct ieee80211_hw *hw, 1430 struct ieee80211_vif *vif, 1431 enum nl80211_iftype newtype, bool newp2p) 1432 { 1433 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1434 struct iwl_rxon_context *ctx, *tmp; 1435 enum nl80211_iftype newviftype = newtype; 1436 u32 interface_modes; 1437 int err; 1438 1439 IWL_DEBUG_MAC80211(priv, "enter\n"); 1440 1441 newtype = ieee80211_iftype_p2p(newtype, newp2p); 1442 1443 mutex_lock(&priv->mutex); 1444 1445 ctx = iwl_rxon_ctx_from_vif(vif); 1446 1447 /* 1448 * To simplify this code, only support changes on the 1449 * BSS context. The PAN context is usually reassigned 1450 * by creating/removing P2P interfaces anyway. 1451 */ 1452 if (ctx->ctxid != IWL_RXON_CTX_BSS) { 1453 err = -EBUSY; 1454 goto out; 1455 } 1456 1457 if (!ctx->vif || !iwl_is_ready_rf(priv)) { 1458 /* 1459 * Huh? But wait ... this can maybe happen when 1460 * we're in the middle of a firmware restart! 1461 */ 1462 err = -EBUSY; 1463 goto out; 1464 } 1465 1466 /* Check if the switch is supported in the same context */ 1467 interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes; 1468 if (!(interface_modes & BIT(newtype))) { 1469 err = -EBUSY; 1470 goto out; 1471 } 1472 1473 if (ctx->exclusive_interface_modes & BIT(newtype)) { 1474 for_each_context(priv, tmp) { 1475 if (ctx == tmp) 1476 continue; 1477 1478 if (!tmp->is_active) 1479 continue; 1480 1481 /* 1482 * The current mode switch would be exclusive, but 1483 * another context is active ... refuse the switch. 1484 */ 1485 err = -EBUSY; 1486 goto out; 1487 } 1488 } 1489 1490 /* success */ 1491 iwl_teardown_interface(priv, vif, true); 1492 vif->type = newviftype; 1493 vif->p2p = newp2p; 1494 err = iwl_setup_interface(priv, ctx); 1495 WARN_ON(err); 1496 /* 1497 * We've switched internally, but submitting to the 1498 * device may have failed for some reason. Mask this 1499 * error, because otherwise mac80211 will not switch 1500 * (and set the interface type back) and we'll be 1501 * out of sync with it. 1502 */ 1503 err = 0; 1504 1505 out: 1506 mutex_unlock(&priv->mutex); 1507 IWL_DEBUG_MAC80211(priv, "leave\n"); 1508 1509 return err; 1510 } 1511 1512 static int iwlagn_mac_hw_scan(struct ieee80211_hw *hw, 1513 struct ieee80211_vif *vif, 1514 struct ieee80211_scan_request *hw_req) 1515 { 1516 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1517 struct cfg80211_scan_request *req = &hw_req->req; 1518 int ret; 1519 1520 IWL_DEBUG_MAC80211(priv, "enter\n"); 1521 1522 if (req->n_channels == 0) 1523 return -EINVAL; 1524 1525 mutex_lock(&priv->mutex); 1526 1527 /* 1528 * If an internal scan is in progress, just set 1529 * up the scan_request as per above. 1530 */ 1531 if (priv->scan_type != IWL_SCAN_NORMAL) { 1532 IWL_DEBUG_SCAN(priv, 1533 "SCAN request during internal scan - defer\n"); 1534 priv->scan_request = req; 1535 priv->scan_vif = vif; 1536 ret = 0; 1537 } else { 1538 priv->scan_request = req; 1539 priv->scan_vif = vif; 1540 /* 1541 * mac80211 will only ask for one band at a time 1542 * so using channels[0] here is ok 1543 */ 1544 ret = iwl_scan_initiate(priv, vif, IWL_SCAN_NORMAL, 1545 req->channels[0]->band); 1546 if (ret) { 1547 priv->scan_request = NULL; 1548 priv->scan_vif = NULL; 1549 } 1550 } 1551 1552 IWL_DEBUG_MAC80211(priv, "leave\n"); 1553 1554 mutex_unlock(&priv->mutex); 1555 1556 return ret; 1557 } 1558 1559 static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id) 1560 { 1561 struct iwl_addsta_cmd cmd = { 1562 .mode = STA_CONTROL_MODIFY_MSK, 1563 .station_flags_msk = STA_FLG_PWR_SAVE_MSK, 1564 .sta.sta_id = sta_id, 1565 }; 1566 1567 iwl_send_add_sta(priv, &cmd, CMD_ASYNC); 1568 } 1569 1570 static void iwlagn_mac_sta_notify(struct ieee80211_hw *hw, 1571 struct ieee80211_vif *vif, 1572 enum sta_notify_cmd cmd, 1573 struct ieee80211_sta *sta) 1574 { 1575 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1576 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv; 1577 int sta_id; 1578 1579 IWL_DEBUG_MAC80211(priv, "enter\n"); 1580 1581 switch (cmd) { 1582 case STA_NOTIFY_SLEEP: 1583 WARN_ON(!sta_priv->client); 1584 sta_priv->asleep = true; 1585 if (atomic_read(&sta_priv->pending_frames) > 0) 1586 ieee80211_sta_block_awake(hw, sta, true); 1587 break; 1588 case STA_NOTIFY_AWAKE: 1589 WARN_ON(!sta_priv->client); 1590 if (!sta_priv->asleep) 1591 break; 1592 sta_priv->asleep = false; 1593 sta_id = iwl_sta_id(sta); 1594 if (sta_id != IWL_INVALID_STATION) 1595 iwl_sta_modify_ps_wake(priv, sta_id); 1596 break; 1597 default: 1598 break; 1599 } 1600 IWL_DEBUG_MAC80211(priv, "leave\n"); 1601 } 1602 1603 const struct ieee80211_ops iwlagn_hw_ops = { 1604 .tx = iwlagn_mac_tx, 1605 .start = iwlagn_mac_start, 1606 .stop = iwlagn_mac_stop, 1607 #ifdef CONFIG_PM_SLEEP 1608 .suspend = iwlagn_mac_suspend, 1609 .resume = iwlagn_mac_resume, 1610 .set_wakeup = iwlagn_mac_set_wakeup, 1611 #endif 1612 .add_interface = iwlagn_mac_add_interface, 1613 .remove_interface = iwlagn_mac_remove_interface, 1614 .change_interface = iwlagn_mac_change_interface, 1615 .config = iwlagn_mac_config, 1616 .configure_filter = iwlagn_configure_filter, 1617 .set_key = iwlagn_mac_set_key, 1618 .update_tkip_key = iwlagn_mac_update_tkip_key, 1619 .set_rekey_data = iwlagn_mac_set_rekey_data, 1620 .conf_tx = iwlagn_mac_conf_tx, 1621 .bss_info_changed = iwlagn_bss_info_changed, 1622 .ampdu_action = iwlagn_mac_ampdu_action, 1623 .hw_scan = iwlagn_mac_hw_scan, 1624 .sta_notify = iwlagn_mac_sta_notify, 1625 .sta_state = iwlagn_mac_sta_state, 1626 .channel_switch = iwlagn_mac_channel_switch, 1627 .flush = iwlagn_mac_flush, 1628 .tx_last_beacon = iwlagn_mac_tx_last_beacon, 1629 .event_callback = iwlagn_mac_event_callback, 1630 .set_tim = iwlagn_mac_set_tim, 1631 }; 1632 1633 /* This function both allocates and initializes hw and priv. */ 1634 struct ieee80211_hw *iwl_alloc_all(void) 1635 { 1636 struct iwl_priv *priv; 1637 struct iwl_op_mode *op_mode; 1638 /* mac80211 allocates memory for this device instance, including 1639 * space for this driver's private structure */ 1640 struct ieee80211_hw *hw; 1641 1642 hw = ieee80211_alloc_hw(sizeof(struct iwl_priv) + 1643 sizeof(struct iwl_op_mode), &iwlagn_hw_ops); 1644 if (!hw) 1645 goto out; 1646 1647 op_mode = hw->priv; 1648 priv = IWL_OP_MODE_GET_DVM(op_mode); 1649 priv->hw = hw; 1650 1651 out: 1652 return hw; 1653 } 1654