mac80211.c revision e56b04efc1f795da42cf1d9651b52a4a5bebd730
1/****************************************************************************** 2 * 3 * Copyright(c) 2003 - 2013 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 * You should have received a copy of the GNU General Public License along with 18 * this program; if not, write to the Free Software Foundation, Inc., 19 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA 20 * 21 * The full GNU General Public License is included in this distribution in the 22 * file called LICENSE. 23 * 24 * Contact Information: 25 * Intel Linux Wireless <ilw@linux.intel.com> 26 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 27 * 28 *****************************************************************************/ 29#include <linux/kernel.h> 30#include <linux/module.h> 31#include <linux/init.h> 32#include <linux/slab.h> 33#include <linux/dma-mapping.h> 34#include <linux/delay.h> 35#include <linux/sched.h> 36#include <linux/skbuff.h> 37#include <linux/netdevice.h> 38#include <linux/etherdevice.h> 39#include <linux/if_arp.h> 40 41#include <net/ieee80211_radiotap.h> 42#include <net/mac80211.h> 43 44#include <asm/div64.h> 45 46#include "iwl-io.h" 47#include "iwl-trans.h" 48#include "iwl-op-mode.h" 49#include "iwl-modparams.h" 50 51#include "dev.h" 52#include "calib.h" 53#include "agn.h" 54 55/***************************************************************************** 56 * 57 * mac80211 entry point functions 58 * 59 *****************************************************************************/ 60 61static const struct ieee80211_iface_limit iwlagn_sta_ap_limits[] = { 62 { 63 .max = 1, 64 .types = BIT(NL80211_IFTYPE_STATION), 65 }, 66 { 67 .max = 1, 68 .types = BIT(NL80211_IFTYPE_AP), 69 }, 70}; 71 72static const struct ieee80211_iface_limit iwlagn_2sta_limits[] = { 73 { 74 .max = 2, 75 .types = BIT(NL80211_IFTYPE_STATION), 76 }, 77}; 78 79static const struct ieee80211_iface_limit iwlagn_p2p_sta_go_limits[] = { 80 { 81 .max = 1, 82 .types = BIT(NL80211_IFTYPE_STATION), 83 }, 84 { 85 .max = 1, 86 .types = BIT(NL80211_IFTYPE_P2P_GO) | 87 BIT(NL80211_IFTYPE_AP), 88 }, 89}; 90 91static const struct ieee80211_iface_limit iwlagn_p2p_2sta_limits[] = { 92 { 93 .max = 2, 94 .types = BIT(NL80211_IFTYPE_STATION), 95 }, 96 { 97 .max = 1, 98 .types = BIT(NL80211_IFTYPE_P2P_CLIENT), 99 }, 100}; 101 102static const struct ieee80211_iface_combination 103iwlagn_iface_combinations_dualmode[] = { 104 { .num_different_channels = 1, 105 .max_interfaces = 2, 106 .beacon_int_infra_match = true, 107 .limits = iwlagn_sta_ap_limits, 108 .n_limits = ARRAY_SIZE(iwlagn_sta_ap_limits), 109 }, 110 { .num_different_channels = 1, 111 .max_interfaces = 2, 112 .limits = iwlagn_2sta_limits, 113 .n_limits = ARRAY_SIZE(iwlagn_2sta_limits), 114 }, 115}; 116 117static const struct ieee80211_iface_combination 118iwlagn_iface_combinations_p2p[] = { 119 { .num_different_channels = 1, 120 .max_interfaces = 2, 121 .beacon_int_infra_match = true, 122 .limits = iwlagn_p2p_sta_go_limits, 123 .n_limits = ARRAY_SIZE(iwlagn_p2p_sta_go_limits), 124 }, 125 { .num_different_channels = 1, 126 .max_interfaces = 2, 127 .limits = iwlagn_p2p_2sta_limits, 128 .n_limits = ARRAY_SIZE(iwlagn_p2p_2sta_limits), 129 }, 130}; 131 132/* 133 * Not a mac80211 entry point function, but it fits in with all the 134 * other mac80211 functions grouped here. 135 */ 136int iwlagn_mac_setup_register(struct iwl_priv *priv, 137 const struct iwl_ucode_capabilities *capa) 138{ 139 int ret; 140 struct ieee80211_hw *hw = priv->hw; 141 struct iwl_rxon_context *ctx; 142 143 hw->rate_control_algorithm = "iwl-agn-rs"; 144 145 /* Tell mac80211 our characteristics */ 146 hw->flags = IEEE80211_HW_SIGNAL_DBM | 147 IEEE80211_HW_AMPDU_AGGREGATION | 148 IEEE80211_HW_NEED_DTIM_PERIOD | 149 IEEE80211_HW_SPECTRUM_MGMT | 150 IEEE80211_HW_REPORTS_TX_ACK_STATUS | 151 IEEE80211_HW_QUEUE_CONTROL | 152 IEEE80211_HW_SUPPORTS_PS | 153 IEEE80211_HW_SUPPORTS_DYNAMIC_PS | 154 IEEE80211_HW_WANT_MONITOR_VIF | 155 IEEE80211_HW_SCAN_WHILE_IDLE; 156 157 hw->offchannel_tx_hw_queue = IWL_AUX_QUEUE; 158 hw->radiotap_mcs_details |= IEEE80211_RADIOTAP_MCS_HAVE_FMT; 159 160 /* 161 * Including the following line will crash some AP's. This 162 * workaround removes the stimulus which causes the crash until 163 * the AP software can be fixed. 164 hw->max_tx_aggregation_subframes = LINK_QUAL_AGG_FRAME_LIMIT_DEF; 165 */ 166 167 if (priv->nvm_data->sku_cap_11n_enable) 168 hw->flags |= IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS | 169 IEEE80211_HW_SUPPORTS_STATIC_SMPS; 170 171 /* 172 * Enable 11w if advertised by firmware and software crypto 173 * is not enabled (as the firmware will interpret some mgmt 174 * packets, so enabling it with software crypto isn't safe) 175 */ 176 if (priv->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_MFP && 177 !iwlwifi_mod_params.sw_crypto) 178 hw->flags |= IEEE80211_HW_MFP_CAPABLE; 179 180 hw->sta_data_size = sizeof(struct iwl_station_priv); 181 hw->vif_data_size = sizeof(struct iwl_vif_priv); 182 183 for_each_context(priv, ctx) { 184 hw->wiphy->interface_modes |= ctx->interface_modes; 185 hw->wiphy->interface_modes |= ctx->exclusive_interface_modes; 186 } 187 188 BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2); 189 190 if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_P2P_CLIENT)) { 191 hw->wiphy->iface_combinations = iwlagn_iface_combinations_p2p; 192 hw->wiphy->n_iface_combinations = 193 ARRAY_SIZE(iwlagn_iface_combinations_p2p); 194 } else if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) { 195 hw->wiphy->iface_combinations = 196 iwlagn_iface_combinations_dualmode; 197 hw->wiphy->n_iface_combinations = 198 ARRAY_SIZE(iwlagn_iface_combinations_dualmode); 199 } 200 201 hw->wiphy->max_remain_on_channel_duration = 500; 202 203 hw->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY | 204 WIPHY_FLAG_DISABLE_BEACON_HINTS | 205 WIPHY_FLAG_IBSS_RSN; 206 207#ifdef CONFIG_PM_SLEEP 208 if (priv->fw->img[IWL_UCODE_WOWLAN].sec[0].len && 209 priv->trans->ops->d3_suspend && 210 priv->trans->ops->d3_resume && 211 device_can_wakeup(priv->trans->dev)) { 212 hw->wiphy->wowlan.flags = WIPHY_WOWLAN_MAGIC_PKT | 213 WIPHY_WOWLAN_DISCONNECT | 214 WIPHY_WOWLAN_EAP_IDENTITY_REQ | 215 WIPHY_WOWLAN_RFKILL_RELEASE; 216 if (!iwlwifi_mod_params.sw_crypto) 217 hw->wiphy->wowlan.flags |= 218 WIPHY_WOWLAN_SUPPORTS_GTK_REKEY | 219 WIPHY_WOWLAN_GTK_REKEY_FAILURE; 220 221 hw->wiphy->wowlan.n_patterns = IWLAGN_WOWLAN_MAX_PATTERNS; 222 hw->wiphy->wowlan.pattern_min_len = 223 IWLAGN_WOWLAN_MIN_PATTERN_LEN; 224 hw->wiphy->wowlan.pattern_max_len = 225 IWLAGN_WOWLAN_MAX_PATTERN_LEN; 226 } 227#endif 228 229 if (iwlwifi_mod_params.power_save) 230 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT; 231 else 232 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT; 233 234 hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX; 235 /* we create the 802.11 header and a max-length SSID element */ 236 hw->wiphy->max_scan_ie_len = capa->max_probe_length - 24 - 34; 237 238 /* 239 * We don't use all queues: 4 and 9 are unused and any 240 * aggregation queue gets mapped down to the AC queue. 241 */ 242 hw->queues = IWLAGN_FIRST_AMPDU_QUEUE; 243 244 hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL; 245 246 if (priv->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels) 247 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = 248 &priv->nvm_data->bands[IEEE80211_BAND_2GHZ]; 249 if (priv->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels) 250 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] = 251 &priv->nvm_data->bands[IEEE80211_BAND_5GHZ]; 252 253 hw->wiphy->hw_version = priv->trans->hw_id; 254 255 iwl_leds_init(priv); 256 257 ret = ieee80211_register_hw(priv->hw); 258 if (ret) { 259 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret); 260 iwl_leds_exit(priv); 261 return ret; 262 } 263 priv->mac80211_registered = 1; 264 265 return 0; 266} 267 268void iwlagn_mac_unregister(struct iwl_priv *priv) 269{ 270 if (!priv->mac80211_registered) 271 return; 272 iwl_leds_exit(priv); 273 ieee80211_unregister_hw(priv->hw); 274 priv->mac80211_registered = 0; 275} 276 277static int __iwl_up(struct iwl_priv *priv) 278{ 279 struct iwl_rxon_context *ctx; 280 int ret; 281 282 lockdep_assert_held(&priv->mutex); 283 284 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) { 285 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n"); 286 return -EIO; 287 } 288 289 for_each_context(priv, ctx) { 290 ret = iwlagn_alloc_bcast_station(priv, ctx); 291 if (ret) { 292 iwl_dealloc_bcast_stations(priv); 293 return ret; 294 } 295 } 296 297 ret = iwl_run_init_ucode(priv); 298 if (ret) { 299 IWL_ERR(priv, "Failed to run INIT ucode: %d\n", ret); 300 goto error; 301 } 302 303 ret = iwl_load_ucode_wait_alive(priv, IWL_UCODE_REGULAR); 304 if (ret) { 305 IWL_ERR(priv, "Failed to start RT ucode: %d\n", ret); 306 goto error; 307 } 308 309 ret = iwl_alive_start(priv); 310 if (ret) 311 goto error; 312 return 0; 313 314 error: 315 set_bit(STATUS_EXIT_PENDING, &priv->status); 316 iwl_down(priv); 317 clear_bit(STATUS_EXIT_PENDING, &priv->status); 318 319 IWL_ERR(priv, "Unable to initialize device.\n"); 320 return ret; 321} 322 323static int iwlagn_mac_start(struct ieee80211_hw *hw) 324{ 325 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 326 int ret; 327 328 IWL_DEBUG_MAC80211(priv, "enter\n"); 329 330 /* we should be verifying the device is ready to be opened */ 331 mutex_lock(&priv->mutex); 332 ret = __iwl_up(priv); 333 mutex_unlock(&priv->mutex); 334 if (ret) 335 return ret; 336 337 IWL_DEBUG_INFO(priv, "Start UP work done.\n"); 338 339 /* Now we should be done, and the READY bit should be set. */ 340 if (WARN_ON(!test_bit(STATUS_READY, &priv->status))) 341 ret = -EIO; 342 343 iwlagn_led_enable(priv); 344 345 priv->is_open = 1; 346 IWL_DEBUG_MAC80211(priv, "leave\n"); 347 return 0; 348} 349 350static void iwlagn_mac_stop(struct ieee80211_hw *hw) 351{ 352 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 353 354 IWL_DEBUG_MAC80211(priv, "enter\n"); 355 356 if (!priv->is_open) 357 return; 358 359 priv->is_open = 0; 360 361 mutex_lock(&priv->mutex); 362 iwl_down(priv); 363 mutex_unlock(&priv->mutex); 364 365 iwl_cancel_deferred_work(priv); 366 367 flush_workqueue(priv->workqueue); 368 369 /* User space software may expect getting rfkill changes 370 * even if interface is down, trans->down will leave the RF 371 * kill interrupt enabled 372 */ 373 iwl_trans_stop_hw(priv->trans, false); 374 375 IWL_DEBUG_MAC80211(priv, "leave\n"); 376} 377 378static void iwlagn_mac_set_rekey_data(struct ieee80211_hw *hw, 379 struct ieee80211_vif *vif, 380 struct cfg80211_gtk_rekey_data *data) 381{ 382 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 383 384 if (iwlwifi_mod_params.sw_crypto) 385 return; 386 387 IWL_DEBUG_MAC80211(priv, "enter\n"); 388 mutex_lock(&priv->mutex); 389 390 if (priv->contexts[IWL_RXON_CTX_BSS].vif != vif) 391 goto out; 392 393 memcpy(priv->kek, data->kek, NL80211_KEK_LEN); 394 memcpy(priv->kck, data->kck, NL80211_KCK_LEN); 395 priv->replay_ctr = 396 cpu_to_le64(be64_to_cpup((__be64 *)&data->replay_ctr)); 397 priv->have_rekey_data = true; 398 399 out: 400 mutex_unlock(&priv->mutex); 401 IWL_DEBUG_MAC80211(priv, "leave\n"); 402} 403 404#ifdef CONFIG_PM_SLEEP 405 406static int iwlagn_mac_suspend(struct ieee80211_hw *hw, 407 struct cfg80211_wowlan *wowlan) 408{ 409 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 410 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS]; 411 int ret; 412 413 if (WARN_ON(!wowlan)) 414 return -EINVAL; 415 416 IWL_DEBUG_MAC80211(priv, "enter\n"); 417 mutex_lock(&priv->mutex); 418 419 /* Don't attempt WoWLAN when not associated, tear down instead. */ 420 if (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION || 421 !iwl_is_associated_ctx(ctx)) { 422 ret = 1; 423 goto out; 424 } 425 426 ret = iwlagn_suspend(priv, wowlan); 427 if (ret) 428 goto error; 429 430 iwl_trans_d3_suspend(priv->trans); 431 432 goto out; 433 434 error: 435 priv->wowlan = false; 436 iwlagn_prepare_restart(priv); 437 ieee80211_restart_hw(priv->hw); 438 out: 439 mutex_unlock(&priv->mutex); 440 IWL_DEBUG_MAC80211(priv, "leave\n"); 441 442 return ret; 443} 444 445static int iwlagn_mac_resume(struct ieee80211_hw *hw) 446{ 447 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 448 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS]; 449 struct ieee80211_vif *vif; 450 unsigned long flags; 451 u32 base, status = 0xffffffff; 452 int ret = -EIO; 453 454 IWL_DEBUG_MAC80211(priv, "enter\n"); 455 mutex_lock(&priv->mutex); 456 457 iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_CLR, 458 CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE); 459 460 base = priv->device_pointers.error_event_table; 461 if (iwlagn_hw_valid_rtc_data_addr(base)) { 462 if (iwl_trans_grab_nic_access(priv->trans, true, &flags)) { 463 iwl_write32(priv->trans, HBUS_TARG_MEM_RADDR, base); 464 status = iwl_read32(priv->trans, HBUS_TARG_MEM_RDAT); 465 iwl_trans_release_nic_access(priv->trans, &flags); 466 ret = 0; 467 } 468 469#ifdef CONFIG_IWLWIFI_DEBUGFS 470 if (ret == 0) { 471 const struct fw_img *img; 472 473 img = &(priv->fw->img[IWL_UCODE_WOWLAN]); 474 if (!priv->wowlan_sram) { 475 priv->wowlan_sram = 476 kzalloc(img->sec[IWL_UCODE_SECTION_DATA].len, 477 GFP_KERNEL); 478 } 479 480 if (priv->wowlan_sram) 481 iwl_trans_read_mem( 482 priv->trans, 0x800000, 483 priv->wowlan_sram, 484 img->sec[IWL_UCODE_SECTION_DATA].len / 4); 485 } 486#endif 487 } 488 489 /* we'll clear ctx->vif during iwlagn_prepare_restart() */ 490 vif = ctx->vif; 491 492 priv->wowlan = false; 493 494 iwlagn_prepare_restart(priv); 495 496 memset((void *)&ctx->active, 0, sizeof(ctx->active)); 497 iwl_connection_init_rx_config(priv, ctx); 498 iwlagn_set_rxon_chain(priv, ctx); 499 500 mutex_unlock(&priv->mutex); 501 IWL_DEBUG_MAC80211(priv, "leave\n"); 502 503 ieee80211_resume_disconnect(vif); 504 505 return 1; 506} 507 508static void iwlagn_mac_set_wakeup(struct ieee80211_hw *hw, bool enabled) 509{ 510 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 511 512 device_set_wakeup_enable(priv->trans->dev, enabled); 513} 514#endif 515 516static void iwlagn_mac_tx(struct ieee80211_hw *hw, 517 struct ieee80211_tx_control *control, 518 struct sk_buff *skb) 519{ 520 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 521 522 if (iwlagn_tx_skb(priv, control->sta, skb)) 523 ieee80211_free_txskb(hw, skb); 524} 525 526static void iwlagn_mac_update_tkip_key(struct ieee80211_hw *hw, 527 struct ieee80211_vif *vif, 528 struct ieee80211_key_conf *keyconf, 529 struct ieee80211_sta *sta, 530 u32 iv32, u16 *phase1key) 531{ 532 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 533 534 iwl_update_tkip_key(priv, vif, keyconf, sta, iv32, phase1key); 535} 536 537static int iwlagn_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd, 538 struct ieee80211_vif *vif, 539 struct ieee80211_sta *sta, 540 struct ieee80211_key_conf *key) 541{ 542 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 543 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv; 544 struct iwl_rxon_context *ctx = vif_priv->ctx; 545 int ret; 546 bool is_default_wep_key = false; 547 548 IWL_DEBUG_MAC80211(priv, "enter\n"); 549 550 if (iwlwifi_mod_params.sw_crypto) { 551 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n"); 552 return -EOPNOTSUPP; 553 } 554 555 switch (key->cipher) { 556 case WLAN_CIPHER_SUITE_TKIP: 557 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC; 558 /* fall through */ 559 case WLAN_CIPHER_SUITE_CCMP: 560 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV; 561 break; 562 default: 563 break; 564 } 565 566 /* 567 * We could program these keys into the hardware as well, but we 568 * don't expect much multicast traffic in IBSS and having keys 569 * for more stations is probably more useful. 570 * 571 * Mark key TX-only and return 0. 572 */ 573 if (vif->type == NL80211_IFTYPE_ADHOC && 574 !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) { 575 key->hw_key_idx = WEP_INVALID_OFFSET; 576 return 0; 577 } 578 579 /* If they key was TX-only, accept deletion */ 580 if (cmd == DISABLE_KEY && key->hw_key_idx == WEP_INVALID_OFFSET) 581 return 0; 582 583 mutex_lock(&priv->mutex); 584 iwl_scan_cancel_timeout(priv, 100); 585 586 BUILD_BUG_ON(WEP_INVALID_OFFSET == IWLAGN_HW_KEY_DEFAULT); 587 588 /* 589 * If we are getting WEP group key and we didn't receive any key mapping 590 * so far, we are in legacy wep mode (group key only), otherwise we are 591 * in 1X mode. 592 * In legacy wep mode, we use another host command to the uCode. 593 */ 594 if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 || 595 key->cipher == WLAN_CIPHER_SUITE_WEP104) && !sta) { 596 if (cmd == SET_KEY) 597 is_default_wep_key = !ctx->key_mapping_keys; 598 else 599 is_default_wep_key = 600 key->hw_key_idx == IWLAGN_HW_KEY_DEFAULT; 601 } 602 603 604 switch (cmd) { 605 case SET_KEY: 606 if (is_default_wep_key) { 607 ret = iwl_set_default_wep_key(priv, vif_priv->ctx, key); 608 break; 609 } 610 ret = iwl_set_dynamic_key(priv, vif_priv->ctx, key, sta); 611 if (ret) { 612 /* 613 * can't add key for RX, but we don't need it 614 * in the device for TX so still return 0 615 */ 616 ret = 0; 617 key->hw_key_idx = WEP_INVALID_OFFSET; 618 } 619 620 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n"); 621 break; 622 case DISABLE_KEY: 623 if (is_default_wep_key) 624 ret = iwl_remove_default_wep_key(priv, ctx, key); 625 else 626 ret = iwl_remove_dynamic_key(priv, ctx, key, sta); 627 628 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n"); 629 break; 630 default: 631 ret = -EINVAL; 632 } 633 634 mutex_unlock(&priv->mutex); 635 IWL_DEBUG_MAC80211(priv, "leave\n"); 636 637 return ret; 638} 639 640static int iwlagn_mac_ampdu_action(struct ieee80211_hw *hw, 641 struct ieee80211_vif *vif, 642 enum ieee80211_ampdu_mlme_action action, 643 struct ieee80211_sta *sta, u16 tid, u16 *ssn, 644 u8 buf_size) 645{ 646 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 647 int ret = -EINVAL; 648 struct iwl_station_priv *sta_priv = (void *) sta->drv_priv; 649 650 IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n", 651 sta->addr, tid); 652 653 if (!(priv->nvm_data->sku_cap_11n_enable)) 654 return -EACCES; 655 656 IWL_DEBUG_MAC80211(priv, "enter\n"); 657 mutex_lock(&priv->mutex); 658 659 switch (action) { 660 case IEEE80211_AMPDU_RX_START: 661 if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG) 662 break; 663 IWL_DEBUG_HT(priv, "start Rx\n"); 664 ret = iwl_sta_rx_agg_start(priv, sta, tid, *ssn); 665 break; 666 case IEEE80211_AMPDU_RX_STOP: 667 IWL_DEBUG_HT(priv, "stop Rx\n"); 668 ret = iwl_sta_rx_agg_stop(priv, sta, tid); 669 break; 670 case IEEE80211_AMPDU_TX_START: 671 if (!priv->trans->ops->txq_enable) 672 break; 673 if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG) 674 break; 675 IWL_DEBUG_HT(priv, "start Tx\n"); 676 ret = iwlagn_tx_agg_start(priv, vif, sta, tid, ssn); 677 break; 678 case IEEE80211_AMPDU_TX_STOP_CONT: 679 case IEEE80211_AMPDU_TX_STOP_FLUSH: 680 case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT: 681 IWL_DEBUG_HT(priv, "stop Tx\n"); 682 ret = iwlagn_tx_agg_stop(priv, vif, sta, tid); 683 if ((ret == 0) && (priv->agg_tids_count > 0)) { 684 priv->agg_tids_count--; 685 IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n", 686 priv->agg_tids_count); 687 } 688 if (!priv->agg_tids_count && 689 priv->hw_params.use_rts_for_aggregation) { 690 /* 691 * switch off RTS/CTS if it was previously enabled 692 */ 693 sta_priv->lq_sta.lq.general_params.flags &= 694 ~LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK; 695 iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif), 696 &sta_priv->lq_sta.lq, CMD_ASYNC, false); 697 } 698 break; 699 case IEEE80211_AMPDU_TX_OPERATIONAL: 700 ret = iwlagn_tx_agg_oper(priv, vif, sta, tid, buf_size); 701 break; 702 } 703 mutex_unlock(&priv->mutex); 704 IWL_DEBUG_MAC80211(priv, "leave\n"); 705 return ret; 706} 707 708static int iwlagn_mac_sta_add(struct ieee80211_hw *hw, 709 struct ieee80211_vif *vif, 710 struct ieee80211_sta *sta) 711{ 712 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 713 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv; 714 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv; 715 bool is_ap = vif->type == NL80211_IFTYPE_STATION; 716 int ret; 717 u8 sta_id; 718 719 IWL_DEBUG_INFO(priv, "proceeding to add station %pM\n", 720 sta->addr); 721 sta_priv->sta_id = IWL_INVALID_STATION; 722 723 atomic_set(&sta_priv->pending_frames, 0); 724 if (vif->type == NL80211_IFTYPE_AP) 725 sta_priv->client = true; 726 727 ret = iwl_add_station_common(priv, vif_priv->ctx, sta->addr, 728 is_ap, sta, &sta_id); 729 if (ret) { 730 IWL_ERR(priv, "Unable to add station %pM (%d)\n", 731 sta->addr, ret); 732 /* Should we return success if return code is EEXIST ? */ 733 return ret; 734 } 735 736 sta_priv->sta_id = sta_id; 737 738 return 0; 739} 740 741static int iwlagn_mac_sta_remove(struct ieee80211_hw *hw, 742 struct ieee80211_vif *vif, 743 struct ieee80211_sta *sta) 744{ 745 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 746 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv; 747 int ret; 748 749 IWL_DEBUG_INFO(priv, "proceeding to remove station %pM\n", sta->addr); 750 751 if (vif->type == NL80211_IFTYPE_STATION) { 752 /* 753 * Station will be removed from device when the RXON 754 * is set to unassociated -- just deactivate it here 755 * to avoid re-programming it. 756 */ 757 ret = 0; 758 iwl_deactivate_station(priv, sta_priv->sta_id, sta->addr); 759 } else { 760 ret = iwl_remove_station(priv, sta_priv->sta_id, sta->addr); 761 if (ret) 762 IWL_DEBUG_QUIET_RFKILL(priv, 763 "Error removing station %pM\n", sta->addr); 764 } 765 return ret; 766} 767 768static int iwlagn_mac_sta_state(struct ieee80211_hw *hw, 769 struct ieee80211_vif *vif, 770 struct ieee80211_sta *sta, 771 enum ieee80211_sta_state old_state, 772 enum ieee80211_sta_state new_state) 773{ 774 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 775 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv; 776 enum { 777 NONE, ADD, REMOVE, HT_RATE_INIT, ADD_RATE_INIT, 778 } op = NONE; 779 int ret; 780 781 IWL_DEBUG_MAC80211(priv, "station %pM state change %d->%d\n", 782 sta->addr, old_state, new_state); 783 784 mutex_lock(&priv->mutex); 785 if (vif->type == NL80211_IFTYPE_STATION) { 786 if (old_state == IEEE80211_STA_NOTEXIST && 787 new_state == IEEE80211_STA_NONE) 788 op = ADD; 789 else if (old_state == IEEE80211_STA_NONE && 790 new_state == IEEE80211_STA_NOTEXIST) 791 op = REMOVE; 792 else if (old_state == IEEE80211_STA_AUTH && 793 new_state == IEEE80211_STA_ASSOC) 794 op = HT_RATE_INIT; 795 } else { 796 if (old_state == IEEE80211_STA_AUTH && 797 new_state == IEEE80211_STA_ASSOC) 798 op = ADD_RATE_INIT; 799 else if (old_state == IEEE80211_STA_ASSOC && 800 new_state == IEEE80211_STA_AUTH) 801 op = REMOVE; 802 } 803 804 switch (op) { 805 case ADD: 806 ret = iwlagn_mac_sta_add(hw, vif, sta); 807 if (ret) 808 break; 809 /* 810 * Clear the in-progress flag, the AP station entry was added 811 * but we'll initialize LQ only when we've associated (which 812 * would also clear the in-progress flag). This is necessary 813 * in case we never initialize LQ because association fails. 814 */ 815 spin_lock_bh(&priv->sta_lock); 816 priv->stations[iwl_sta_id(sta)].used &= 817 ~IWL_STA_UCODE_INPROGRESS; 818 spin_unlock_bh(&priv->sta_lock); 819 break; 820 case REMOVE: 821 ret = iwlagn_mac_sta_remove(hw, vif, sta); 822 break; 823 case ADD_RATE_INIT: 824 ret = iwlagn_mac_sta_add(hw, vif, sta); 825 if (ret) 826 break; 827 /* Initialize rate scaling */ 828 IWL_DEBUG_INFO(priv, 829 "Initializing rate scaling for station %pM\n", 830 sta->addr); 831 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta)); 832 ret = 0; 833 break; 834 case HT_RATE_INIT: 835 /* Initialize rate scaling */ 836 ret = iwl_sta_update_ht(priv, vif_priv->ctx, sta); 837 if (ret) 838 break; 839 IWL_DEBUG_INFO(priv, 840 "Initializing rate scaling for station %pM\n", 841 sta->addr); 842 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta)); 843 ret = 0; 844 break; 845 default: 846 ret = 0; 847 break; 848 } 849 850 /* 851 * mac80211 might WARN if we fail, but due the way we 852 * (badly) handle hard rfkill, we might fail here 853 */ 854 if (iwl_is_rfkill(priv)) 855 ret = 0; 856 857 mutex_unlock(&priv->mutex); 858 IWL_DEBUG_MAC80211(priv, "leave\n"); 859 860 return ret; 861} 862 863static void iwlagn_mac_channel_switch(struct ieee80211_hw *hw, 864 struct ieee80211_channel_switch *ch_switch) 865{ 866 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 867 struct ieee80211_conf *conf = &hw->conf; 868 struct ieee80211_channel *channel = ch_switch->channel; 869 struct iwl_ht_config *ht_conf = &priv->current_ht_config; 870 /* 871 * MULTI-FIXME 872 * When we add support for multiple interfaces, we need to 873 * revisit this. The channel switch command in the device 874 * only affects the BSS context, but what does that really 875 * mean? And what if we get a CSA on the second interface? 876 * This needs a lot of work. 877 */ 878 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS]; 879 u16 ch; 880 881 IWL_DEBUG_MAC80211(priv, "enter\n"); 882 883 mutex_lock(&priv->mutex); 884 885 if (iwl_is_rfkill(priv)) 886 goto out; 887 888 if (test_bit(STATUS_EXIT_PENDING, &priv->status) || 889 test_bit(STATUS_SCANNING, &priv->status) || 890 test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status)) 891 goto out; 892 893 if (!iwl_is_associated_ctx(ctx)) 894 goto out; 895 896 if (!priv->lib->set_channel_switch) 897 goto out; 898 899 ch = channel->hw_value; 900 if (le16_to_cpu(ctx->active.channel) == ch) 901 goto out; 902 903 priv->current_ht_config.smps = conf->smps_mode; 904 905 /* Configure HT40 channels */ 906 ctx->ht.enabled = conf_is_ht(conf); 907 if (ctx->ht.enabled) 908 iwlagn_config_ht40(conf, ctx); 909 else 910 ctx->ht.is_40mhz = false; 911 912 if ((le16_to_cpu(ctx->staging.channel) != ch)) 913 ctx->staging.flags = 0; 914 915 iwl_set_rxon_channel(priv, channel, ctx); 916 iwl_set_rxon_ht(priv, ht_conf); 917 iwl_set_flags_for_band(priv, ctx, channel->band, ctx->vif); 918 919 /* 920 * at this point, staging_rxon has the 921 * configuration for channel switch 922 */ 923 set_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status); 924 priv->switch_channel = cpu_to_le16(ch); 925 if (priv->lib->set_channel_switch(priv, ch_switch)) { 926 clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status); 927 priv->switch_channel = 0; 928 ieee80211_chswitch_done(ctx->vif, false); 929 } 930 931out: 932 mutex_unlock(&priv->mutex); 933 IWL_DEBUG_MAC80211(priv, "leave\n"); 934} 935 936void iwl_chswitch_done(struct iwl_priv *priv, bool is_success) 937{ 938 /* 939 * MULTI-FIXME 940 * See iwlagn_mac_channel_switch. 941 */ 942 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS]; 943 944 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) 945 return; 946 947 if (test_and_clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status)) 948 ieee80211_chswitch_done(ctx->vif, is_success); 949} 950 951static void iwlagn_configure_filter(struct ieee80211_hw *hw, 952 unsigned int changed_flags, 953 unsigned int *total_flags, 954 u64 multicast) 955{ 956 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 957 __le32 filter_or = 0, filter_nand = 0; 958 struct iwl_rxon_context *ctx; 959 960#define CHK(test, flag) do { \ 961 if (*total_flags & (test)) \ 962 filter_or |= (flag); \ 963 else \ 964 filter_nand |= (flag); \ 965 } while (0) 966 967 IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n", 968 changed_flags, *total_flags); 969 970 CHK(FIF_OTHER_BSS | FIF_PROMISC_IN_BSS, RXON_FILTER_PROMISC_MSK); 971 /* Setting _just_ RXON_FILTER_CTL2HOST_MSK causes FH errors */ 972 CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_PROMISC_MSK); 973 CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK); 974 975#undef CHK 976 977 mutex_lock(&priv->mutex); 978 979 for_each_context(priv, ctx) { 980 ctx->staging.filter_flags &= ~filter_nand; 981 ctx->staging.filter_flags |= filter_or; 982 983 /* 984 * Not committing directly because hardware can perform a scan, 985 * but we'll eventually commit the filter flags change anyway. 986 */ 987 } 988 989 mutex_unlock(&priv->mutex); 990 991 /* 992 * Receiving all multicast frames is always enabled by the 993 * default flags setup in iwl_connection_init_rx_config() 994 * since we currently do not support programming multicast 995 * filters into the device. 996 */ 997 *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS | 998 FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL; 999} 1000 1001static void iwlagn_mac_flush(struct ieee80211_hw *hw, bool drop) 1002{ 1003 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1004 1005 mutex_lock(&priv->mutex); 1006 IWL_DEBUG_MAC80211(priv, "enter\n"); 1007 1008 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) { 1009 IWL_DEBUG_TX(priv, "Aborting flush due to device shutdown\n"); 1010 goto done; 1011 } 1012 if (iwl_is_rfkill(priv)) { 1013 IWL_DEBUG_TX(priv, "Aborting flush due to RF Kill\n"); 1014 goto done; 1015 } 1016 1017 /* 1018 * mac80211 will not push any more frames for transmit 1019 * until the flush is completed 1020 */ 1021 if (drop) { 1022 IWL_DEBUG_MAC80211(priv, "send flush command\n"); 1023 if (iwlagn_txfifo_flush(priv)) { 1024 IWL_ERR(priv, "flush request fail\n"); 1025 goto done; 1026 } 1027 } 1028 IWL_DEBUG_MAC80211(priv, "wait transmit/flush all frames\n"); 1029 iwl_trans_wait_tx_queue_empty(priv->trans); 1030done: 1031 mutex_unlock(&priv->mutex); 1032 IWL_DEBUG_MAC80211(priv, "leave\n"); 1033} 1034 1035static int iwlagn_mac_remain_on_channel(struct ieee80211_hw *hw, 1036 struct ieee80211_vif *vif, 1037 struct ieee80211_channel *channel, 1038 int duration) 1039{ 1040 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1041 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_PAN]; 1042 int err = 0; 1043 1044 if (!(priv->valid_contexts & BIT(IWL_RXON_CTX_PAN))) 1045 return -EOPNOTSUPP; 1046 1047 if (!(ctx->interface_modes & BIT(NL80211_IFTYPE_P2P_CLIENT))) 1048 return -EOPNOTSUPP; 1049 1050 IWL_DEBUG_MAC80211(priv, "enter\n"); 1051 mutex_lock(&priv->mutex); 1052 1053 if (test_bit(STATUS_SCAN_HW, &priv->status)) { 1054 /* mac80211 should not scan while ROC or ROC while scanning */ 1055 if (WARN_ON_ONCE(priv->scan_type != IWL_SCAN_RADIO_RESET)) { 1056 err = -EBUSY; 1057 goto out; 1058 } 1059 1060 iwl_scan_cancel_timeout(priv, 100); 1061 1062 if (test_bit(STATUS_SCAN_HW, &priv->status)) { 1063 err = -EBUSY; 1064 goto out; 1065 } 1066 } 1067 1068 priv->hw_roc_channel = channel; 1069 /* convert from ms to TU */ 1070 priv->hw_roc_duration = DIV_ROUND_UP(1000 * duration, 1024); 1071 priv->hw_roc_start_notified = false; 1072 cancel_delayed_work(&priv->hw_roc_disable_work); 1073 1074 if (!ctx->is_active) { 1075 static const struct iwl_qos_info default_qos_data = { 1076 .def_qos_parm = { 1077 .ac[0] = { 1078 .cw_min = cpu_to_le16(3), 1079 .cw_max = cpu_to_le16(7), 1080 .aifsn = 2, 1081 .edca_txop = cpu_to_le16(1504), 1082 }, 1083 .ac[1] = { 1084 .cw_min = cpu_to_le16(7), 1085 .cw_max = cpu_to_le16(15), 1086 .aifsn = 2, 1087 .edca_txop = cpu_to_le16(3008), 1088 }, 1089 .ac[2] = { 1090 .cw_min = cpu_to_le16(15), 1091 .cw_max = cpu_to_le16(1023), 1092 .aifsn = 3, 1093 }, 1094 .ac[3] = { 1095 .cw_min = cpu_to_le16(15), 1096 .cw_max = cpu_to_le16(1023), 1097 .aifsn = 7, 1098 }, 1099 }, 1100 }; 1101 1102 ctx->is_active = true; 1103 ctx->qos_data = default_qos_data; 1104 ctx->staging.dev_type = RXON_DEV_TYPE_P2P; 1105 memcpy(ctx->staging.node_addr, 1106 priv->contexts[IWL_RXON_CTX_BSS].staging.node_addr, 1107 ETH_ALEN); 1108 memcpy(ctx->staging.bssid_addr, 1109 priv->contexts[IWL_RXON_CTX_BSS].staging.node_addr, 1110 ETH_ALEN); 1111 err = iwlagn_commit_rxon(priv, ctx); 1112 if (err) 1113 goto out; 1114 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK | 1115 RXON_FILTER_PROMISC_MSK | 1116 RXON_FILTER_CTL2HOST_MSK; 1117 1118 err = iwlagn_commit_rxon(priv, ctx); 1119 if (err) { 1120 iwlagn_disable_roc(priv); 1121 goto out; 1122 } 1123 priv->hw_roc_setup = true; 1124 } 1125 1126 err = iwl_scan_initiate(priv, ctx->vif, IWL_SCAN_ROC, channel->band); 1127 if (err) 1128 iwlagn_disable_roc(priv); 1129 1130 out: 1131 mutex_unlock(&priv->mutex); 1132 IWL_DEBUG_MAC80211(priv, "leave\n"); 1133 1134 return err; 1135} 1136 1137static int iwlagn_mac_cancel_remain_on_channel(struct ieee80211_hw *hw) 1138{ 1139 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1140 1141 if (!(priv->valid_contexts & BIT(IWL_RXON_CTX_PAN))) 1142 return -EOPNOTSUPP; 1143 1144 IWL_DEBUG_MAC80211(priv, "enter\n"); 1145 mutex_lock(&priv->mutex); 1146 iwl_scan_cancel_timeout(priv, priv->hw_roc_duration); 1147 iwlagn_disable_roc(priv); 1148 mutex_unlock(&priv->mutex); 1149 IWL_DEBUG_MAC80211(priv, "leave\n"); 1150 1151 return 0; 1152} 1153 1154static void iwlagn_mac_rssi_callback(struct ieee80211_hw *hw, 1155 struct ieee80211_vif *vif, 1156 enum ieee80211_rssi_event rssi_event) 1157{ 1158 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1159 1160 IWL_DEBUG_MAC80211(priv, "enter\n"); 1161 mutex_lock(&priv->mutex); 1162 1163 if (priv->cfg->bt_params && 1164 priv->cfg->bt_params->advanced_bt_coexist) { 1165 if (rssi_event == RSSI_EVENT_LOW) 1166 priv->bt_enable_pspoll = true; 1167 else if (rssi_event == RSSI_EVENT_HIGH) 1168 priv->bt_enable_pspoll = false; 1169 1170 iwlagn_send_advance_bt_config(priv); 1171 } else { 1172 IWL_DEBUG_MAC80211(priv, "Advanced BT coex disabled," 1173 "ignoring RSSI callback\n"); 1174 } 1175 1176 mutex_unlock(&priv->mutex); 1177 IWL_DEBUG_MAC80211(priv, "leave\n"); 1178} 1179 1180static int iwlagn_mac_set_tim(struct ieee80211_hw *hw, 1181 struct ieee80211_sta *sta, bool set) 1182{ 1183 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1184 1185 queue_work(priv->workqueue, &priv->beacon_update); 1186 1187 return 0; 1188} 1189 1190static int iwlagn_mac_conf_tx(struct ieee80211_hw *hw, 1191 struct ieee80211_vif *vif, u16 queue, 1192 const struct ieee80211_tx_queue_params *params) 1193{ 1194 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1195 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv; 1196 struct iwl_rxon_context *ctx = vif_priv->ctx; 1197 int q; 1198 1199 if (WARN_ON(!ctx)) 1200 return -EINVAL; 1201 1202 IWL_DEBUG_MAC80211(priv, "enter\n"); 1203 1204 if (!iwl_is_ready_rf(priv)) { 1205 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n"); 1206 return -EIO; 1207 } 1208 1209 if (queue >= AC_NUM) { 1210 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue); 1211 return 0; 1212 } 1213 1214 q = AC_NUM - 1 - queue; 1215 1216 mutex_lock(&priv->mutex); 1217 1218 ctx->qos_data.def_qos_parm.ac[q].cw_min = 1219 cpu_to_le16(params->cw_min); 1220 ctx->qos_data.def_qos_parm.ac[q].cw_max = 1221 cpu_to_le16(params->cw_max); 1222 ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs; 1223 ctx->qos_data.def_qos_parm.ac[q].edca_txop = 1224 cpu_to_le16((params->txop * 32)); 1225 1226 ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0; 1227 1228 mutex_unlock(&priv->mutex); 1229 1230 IWL_DEBUG_MAC80211(priv, "leave\n"); 1231 return 0; 1232} 1233 1234static int iwlagn_mac_tx_last_beacon(struct ieee80211_hw *hw) 1235{ 1236 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1237 1238 return priv->ibss_manager == IWL_IBSS_MANAGER; 1239} 1240 1241static int iwl_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx) 1242{ 1243 iwl_connection_init_rx_config(priv, ctx); 1244 1245 iwlagn_set_rxon_chain(priv, ctx); 1246 1247 return iwlagn_commit_rxon(priv, ctx); 1248} 1249 1250static int iwl_setup_interface(struct iwl_priv *priv, 1251 struct iwl_rxon_context *ctx) 1252{ 1253 struct ieee80211_vif *vif = ctx->vif; 1254 int err, ac; 1255 1256 lockdep_assert_held(&priv->mutex); 1257 1258 /* 1259 * This variable will be correct only when there's just 1260 * a single context, but all code using it is for hardware 1261 * that supports only one context. 1262 */ 1263 priv->iw_mode = vif->type; 1264 1265 ctx->is_active = true; 1266 1267 err = iwl_set_mode(priv, ctx); 1268 if (err) { 1269 if (!ctx->always_active) 1270 ctx->is_active = false; 1271 return err; 1272 } 1273 1274 if (priv->cfg->bt_params && priv->cfg->bt_params->advanced_bt_coexist && 1275 vif->type == NL80211_IFTYPE_ADHOC) { 1276 /* 1277 * pretend to have high BT traffic as long as we 1278 * are operating in IBSS mode, as this will cause 1279 * the rate scaling etc. to behave as intended. 1280 */ 1281 priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH; 1282 } 1283 1284 /* set up queue mappings */ 1285 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 1286 vif->hw_queue[ac] = ctx->ac_to_queue[ac]; 1287 1288 if (vif->type == NL80211_IFTYPE_AP) 1289 vif->cab_queue = ctx->mcast_queue; 1290 else 1291 vif->cab_queue = IEEE80211_INVAL_HW_QUEUE; 1292 1293 return 0; 1294} 1295 1296static int iwlagn_mac_add_interface(struct ieee80211_hw *hw, 1297 struct ieee80211_vif *vif) 1298{ 1299 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1300 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv; 1301 struct iwl_rxon_context *tmp, *ctx = NULL; 1302 int err; 1303 enum nl80211_iftype viftype = ieee80211_vif_type_p2p(vif); 1304 bool reset = false; 1305 1306 IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n", 1307 viftype, vif->addr); 1308 1309 cancel_delayed_work_sync(&priv->hw_roc_disable_work); 1310 1311 mutex_lock(&priv->mutex); 1312 1313 iwlagn_disable_roc(priv); 1314 1315 if (!iwl_is_ready_rf(priv)) { 1316 IWL_WARN(priv, "Try to add interface when device not ready\n"); 1317 err = -EINVAL; 1318 goto out; 1319 } 1320 1321 for_each_context(priv, tmp) { 1322 u32 possible_modes = 1323 tmp->interface_modes | tmp->exclusive_interface_modes; 1324 1325 if (tmp->vif) { 1326 /* On reset we need to add the same interface again */ 1327 if (tmp->vif == vif) { 1328 reset = true; 1329 ctx = tmp; 1330 break; 1331 } 1332 1333 /* check if this busy context is exclusive */ 1334 if (tmp->exclusive_interface_modes & 1335 BIT(tmp->vif->type)) { 1336 err = -EINVAL; 1337 goto out; 1338 } 1339 continue; 1340 } 1341 1342 if (!(possible_modes & BIT(viftype))) 1343 continue; 1344 1345 /* have maybe usable context w/o interface */ 1346 ctx = tmp; 1347 break; 1348 } 1349 1350 if (!ctx) { 1351 err = -EOPNOTSUPP; 1352 goto out; 1353 } 1354 1355 vif_priv->ctx = ctx; 1356 ctx->vif = vif; 1357 1358 /* 1359 * In SNIFFER device type, the firmware reports the FCS to 1360 * the host, rather than snipping it off. Unfortunately, 1361 * mac80211 doesn't (yet) provide a per-packet flag for 1362 * this, so that we have to set the hardware flag based 1363 * on the interfaces added. As the monitor interface can 1364 * only be present by itself, and will be removed before 1365 * other interfaces are added, this is safe. 1366 */ 1367 if (vif->type == NL80211_IFTYPE_MONITOR) 1368 priv->hw->flags |= IEEE80211_HW_RX_INCLUDES_FCS; 1369 else 1370 priv->hw->flags &= ~IEEE80211_HW_RX_INCLUDES_FCS; 1371 1372 err = iwl_setup_interface(priv, ctx); 1373 if (!err || reset) 1374 goto out; 1375 1376 ctx->vif = NULL; 1377 priv->iw_mode = NL80211_IFTYPE_STATION; 1378 out: 1379 mutex_unlock(&priv->mutex); 1380 1381 IWL_DEBUG_MAC80211(priv, "leave\n"); 1382 return err; 1383} 1384 1385static void iwl_teardown_interface(struct iwl_priv *priv, 1386 struct ieee80211_vif *vif, 1387 bool mode_change) 1388{ 1389 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif); 1390 1391 lockdep_assert_held(&priv->mutex); 1392 1393 if (priv->scan_vif == vif) { 1394 iwl_scan_cancel_timeout(priv, 200); 1395 iwl_force_scan_end(priv); 1396 } 1397 1398 if (!mode_change) { 1399 iwl_set_mode(priv, ctx); 1400 if (!ctx->always_active) 1401 ctx->is_active = false; 1402 } 1403 1404 /* 1405 * When removing the IBSS interface, overwrite the 1406 * BT traffic load with the stored one from the last 1407 * notification, if any. If this is a device that 1408 * doesn't implement this, this has no effect since 1409 * both values are the same and zero. 1410 */ 1411 if (vif->type == NL80211_IFTYPE_ADHOC) 1412 priv->bt_traffic_load = priv->last_bt_traffic_load; 1413} 1414 1415static void iwlagn_mac_remove_interface(struct ieee80211_hw *hw, 1416 struct ieee80211_vif *vif) 1417{ 1418 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1419 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif); 1420 1421 IWL_DEBUG_MAC80211(priv, "enter\n"); 1422 1423 mutex_lock(&priv->mutex); 1424 1425 if (WARN_ON(ctx->vif != vif)) { 1426 struct iwl_rxon_context *tmp; 1427 IWL_ERR(priv, "ctx->vif = %p, vif = %p\n", ctx->vif, vif); 1428 for_each_context(priv, tmp) 1429 IWL_ERR(priv, "\tID = %d:\tctx = %p\tctx->vif = %p\n", 1430 tmp->ctxid, tmp, tmp->vif); 1431 } 1432 ctx->vif = NULL; 1433 1434 iwl_teardown_interface(priv, vif, false); 1435 1436 mutex_unlock(&priv->mutex); 1437 1438 IWL_DEBUG_MAC80211(priv, "leave\n"); 1439 1440} 1441 1442static int iwlagn_mac_change_interface(struct ieee80211_hw *hw, 1443 struct ieee80211_vif *vif, 1444 enum nl80211_iftype newtype, bool newp2p) 1445{ 1446 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1447 struct iwl_rxon_context *ctx, *tmp; 1448 enum nl80211_iftype newviftype = newtype; 1449 u32 interface_modes; 1450 int err; 1451 1452 IWL_DEBUG_MAC80211(priv, "enter\n"); 1453 1454 newtype = ieee80211_iftype_p2p(newtype, newp2p); 1455 1456 mutex_lock(&priv->mutex); 1457 1458 ctx = iwl_rxon_ctx_from_vif(vif); 1459 1460 /* 1461 * To simplify this code, only support changes on the 1462 * BSS context. The PAN context is usually reassigned 1463 * by creating/removing P2P interfaces anyway. 1464 */ 1465 if (ctx->ctxid != IWL_RXON_CTX_BSS) { 1466 err = -EBUSY; 1467 goto out; 1468 } 1469 1470 if (!ctx->vif || !iwl_is_ready_rf(priv)) { 1471 /* 1472 * Huh? But wait ... this can maybe happen when 1473 * we're in the middle of a firmware restart! 1474 */ 1475 err = -EBUSY; 1476 goto out; 1477 } 1478 1479 /* Check if the switch is supported in the same context */ 1480 interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes; 1481 if (!(interface_modes & BIT(newtype))) { 1482 err = -EBUSY; 1483 goto out; 1484 } 1485 1486 if (ctx->exclusive_interface_modes & BIT(newtype)) { 1487 for_each_context(priv, tmp) { 1488 if (ctx == tmp) 1489 continue; 1490 1491 if (!tmp->is_active) 1492 continue; 1493 1494 /* 1495 * The current mode switch would be exclusive, but 1496 * another context is active ... refuse the switch. 1497 */ 1498 err = -EBUSY; 1499 goto out; 1500 } 1501 } 1502 1503 /* success */ 1504 iwl_teardown_interface(priv, vif, true); 1505 vif->type = newviftype; 1506 vif->p2p = newp2p; 1507 err = iwl_setup_interface(priv, ctx); 1508 WARN_ON(err); 1509 /* 1510 * We've switched internally, but submitting to the 1511 * device may have failed for some reason. Mask this 1512 * error, because otherwise mac80211 will not switch 1513 * (and set the interface type back) and we'll be 1514 * out of sync with it. 1515 */ 1516 err = 0; 1517 1518 out: 1519 mutex_unlock(&priv->mutex); 1520 IWL_DEBUG_MAC80211(priv, "leave\n"); 1521 1522 return err; 1523} 1524 1525static int iwlagn_mac_hw_scan(struct ieee80211_hw *hw, 1526 struct ieee80211_vif *vif, 1527 struct cfg80211_scan_request *req) 1528{ 1529 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1530 int ret; 1531 1532 IWL_DEBUG_MAC80211(priv, "enter\n"); 1533 1534 if (req->n_channels == 0) 1535 return -EINVAL; 1536 1537 mutex_lock(&priv->mutex); 1538 1539 /* 1540 * If an internal scan is in progress, just set 1541 * up the scan_request as per above. 1542 */ 1543 if (priv->scan_type != IWL_SCAN_NORMAL) { 1544 IWL_DEBUG_SCAN(priv, 1545 "SCAN request during internal scan - defer\n"); 1546 priv->scan_request = req; 1547 priv->scan_vif = vif; 1548 ret = 0; 1549 } else { 1550 priv->scan_request = req; 1551 priv->scan_vif = vif; 1552 /* 1553 * mac80211 will only ask for one band at a time 1554 * so using channels[0] here is ok 1555 */ 1556 ret = iwl_scan_initiate(priv, vif, IWL_SCAN_NORMAL, 1557 req->channels[0]->band); 1558 if (ret) { 1559 priv->scan_request = NULL; 1560 priv->scan_vif = NULL; 1561 } 1562 } 1563 1564 IWL_DEBUG_MAC80211(priv, "leave\n"); 1565 1566 mutex_unlock(&priv->mutex); 1567 1568 return ret; 1569} 1570 1571static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id) 1572{ 1573 struct iwl_addsta_cmd cmd = { 1574 .mode = STA_CONTROL_MODIFY_MSK, 1575 .station_flags_msk = STA_FLG_PWR_SAVE_MSK, 1576 .sta.sta_id = sta_id, 1577 }; 1578 1579 iwl_send_add_sta(priv, &cmd, CMD_ASYNC); 1580} 1581 1582static void iwlagn_mac_sta_notify(struct ieee80211_hw *hw, 1583 struct ieee80211_vif *vif, 1584 enum sta_notify_cmd cmd, 1585 struct ieee80211_sta *sta) 1586{ 1587 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1588 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv; 1589 int sta_id; 1590 1591 IWL_DEBUG_MAC80211(priv, "enter\n"); 1592 1593 switch (cmd) { 1594 case STA_NOTIFY_SLEEP: 1595 WARN_ON(!sta_priv->client); 1596 sta_priv->asleep = true; 1597 if (atomic_read(&sta_priv->pending_frames) > 0) 1598 ieee80211_sta_block_awake(hw, sta, true); 1599 break; 1600 case STA_NOTIFY_AWAKE: 1601 WARN_ON(!sta_priv->client); 1602 if (!sta_priv->asleep) 1603 break; 1604 sta_priv->asleep = false; 1605 sta_id = iwl_sta_id(sta); 1606 if (sta_id != IWL_INVALID_STATION) 1607 iwl_sta_modify_ps_wake(priv, sta_id); 1608 break; 1609 default: 1610 break; 1611 } 1612 IWL_DEBUG_MAC80211(priv, "leave\n"); 1613} 1614 1615struct ieee80211_ops iwlagn_hw_ops = { 1616 .tx = iwlagn_mac_tx, 1617 .start = iwlagn_mac_start, 1618 .stop = iwlagn_mac_stop, 1619#ifdef CONFIG_PM_SLEEP 1620 .suspend = iwlagn_mac_suspend, 1621 .resume = iwlagn_mac_resume, 1622 .set_wakeup = iwlagn_mac_set_wakeup, 1623#endif 1624 .add_interface = iwlagn_mac_add_interface, 1625 .remove_interface = iwlagn_mac_remove_interface, 1626 .change_interface = iwlagn_mac_change_interface, 1627 .config = iwlagn_mac_config, 1628 .configure_filter = iwlagn_configure_filter, 1629 .set_key = iwlagn_mac_set_key, 1630 .update_tkip_key = iwlagn_mac_update_tkip_key, 1631 .set_rekey_data = iwlagn_mac_set_rekey_data, 1632 .conf_tx = iwlagn_mac_conf_tx, 1633 .bss_info_changed = iwlagn_bss_info_changed, 1634 .ampdu_action = iwlagn_mac_ampdu_action, 1635 .hw_scan = iwlagn_mac_hw_scan, 1636 .sta_notify = iwlagn_mac_sta_notify, 1637 .sta_state = iwlagn_mac_sta_state, 1638 .channel_switch = iwlagn_mac_channel_switch, 1639 .flush = iwlagn_mac_flush, 1640 .tx_last_beacon = iwlagn_mac_tx_last_beacon, 1641 .remain_on_channel = iwlagn_mac_remain_on_channel, 1642 .cancel_remain_on_channel = iwlagn_mac_cancel_remain_on_channel, 1643 .rssi_callback = iwlagn_mac_rssi_callback, 1644 CFG80211_TESTMODE_CMD(iwlagn_mac_testmode_cmd) 1645 CFG80211_TESTMODE_DUMP(iwlagn_mac_testmode_dump) 1646 .set_tim = iwlagn_mac_set_tim, 1647}; 1648 1649/* This function both allocates and initializes hw and priv. */ 1650struct ieee80211_hw *iwl_alloc_all(void) 1651{ 1652 struct iwl_priv *priv; 1653 struct iwl_op_mode *op_mode; 1654 /* mac80211 allocates memory for this device instance, including 1655 * space for this driver's private structure */ 1656 struct ieee80211_hw *hw; 1657 1658 hw = ieee80211_alloc_hw(sizeof(struct iwl_priv) + 1659 sizeof(struct iwl_op_mode), &iwlagn_hw_ops); 1660 if (!hw) 1661 goto out; 1662 1663 op_mode = hw->priv; 1664 priv = IWL_OP_MODE_GET_DVM(op_mode); 1665 priv->hw = hw; 1666 1667out: 1668 return hw; 1669} 1670