mac80211.c revision e75dac921d88ac1fa1ad08686ab242556f8b888b
1/****************************************************************************** 2 * 3 * Copyright(c) 2003 - 2012 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->eeprom_data->sku & EEPROM_SKU_CAP_11N_ENABLE) 168 hw->flags |= IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS | 169 IEEE80211_HW_SUPPORTS_STATIC_SMPS; 170 171#ifndef CONFIG_IWLWIFI_EXPERIMENTAL_MFP 172 /* enable 11w if the uCode advertise */ 173 if (capa->flags & IWL_UCODE_TLV_FLAGS_MFP) 174#endif /* !CONFIG_IWLWIFI_EXPERIMENTAL_MFP */ 175 hw->flags |= IEEE80211_HW_MFP_CAPABLE; 176 177 hw->sta_data_size = sizeof(struct iwl_station_priv); 178 hw->vif_data_size = sizeof(struct iwl_vif_priv); 179 180 for_each_context(priv, ctx) { 181 hw->wiphy->interface_modes |= ctx->interface_modes; 182 hw->wiphy->interface_modes |= ctx->exclusive_interface_modes; 183 } 184 185 BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2); 186 187 if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_P2P_CLIENT)) { 188 hw->wiphy->iface_combinations = iwlagn_iface_combinations_p2p; 189 hw->wiphy->n_iface_combinations = 190 ARRAY_SIZE(iwlagn_iface_combinations_p2p); 191 } else if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) { 192 hw->wiphy->iface_combinations = 193 iwlagn_iface_combinations_dualmode; 194 hw->wiphy->n_iface_combinations = 195 ARRAY_SIZE(iwlagn_iface_combinations_dualmode); 196 } 197 198 hw->wiphy->max_remain_on_channel_duration = 1000; 199 200 hw->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY | 201 WIPHY_FLAG_DISABLE_BEACON_HINTS | 202 WIPHY_FLAG_IBSS_RSN; 203 204#ifdef CONFIG_PM_SLEEP 205 if (priv->fw->img[IWL_UCODE_WOWLAN].sec[0].len && 206 priv->trans->ops->wowlan_suspend && 207 device_can_wakeup(priv->trans->dev)) { 208 hw->wiphy->wowlan.flags = WIPHY_WOWLAN_MAGIC_PKT | 209 WIPHY_WOWLAN_DISCONNECT | 210 WIPHY_WOWLAN_EAP_IDENTITY_REQ | 211 WIPHY_WOWLAN_RFKILL_RELEASE; 212 if (!iwlwifi_mod_params.sw_crypto) 213 hw->wiphy->wowlan.flags |= 214 WIPHY_WOWLAN_SUPPORTS_GTK_REKEY | 215 WIPHY_WOWLAN_GTK_REKEY_FAILURE; 216 217 hw->wiphy->wowlan.n_patterns = IWLAGN_WOWLAN_MAX_PATTERNS; 218 hw->wiphy->wowlan.pattern_min_len = 219 IWLAGN_WOWLAN_MIN_PATTERN_LEN; 220 hw->wiphy->wowlan.pattern_max_len = 221 IWLAGN_WOWLAN_MAX_PATTERN_LEN; 222 } 223#endif 224 225 if (iwlwifi_mod_params.power_save) 226 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT; 227 else 228 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT; 229 230 hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX; 231 /* we create the 802.11 header and a max-length SSID element */ 232 hw->wiphy->max_scan_ie_len = capa->max_probe_length - 24 - 34; 233 234 /* 235 * We don't use all queues: 4 and 9 are unused and any 236 * aggregation queue gets mapped down to the AC queue. 237 */ 238 hw->queues = IWLAGN_FIRST_AMPDU_QUEUE; 239 240 hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL; 241 242 if (priv->eeprom_data->bands[IEEE80211_BAND_2GHZ].n_channels) 243 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = 244 &priv->eeprom_data->bands[IEEE80211_BAND_2GHZ]; 245 if (priv->eeprom_data->bands[IEEE80211_BAND_5GHZ].n_channels) 246 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] = 247 &priv->eeprom_data->bands[IEEE80211_BAND_5GHZ]; 248 249 hw->wiphy->hw_version = priv->trans->hw_id; 250 251 iwl_leds_init(priv); 252 253 ret = ieee80211_register_hw(priv->hw); 254 if (ret) { 255 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret); 256 iwl_leds_exit(priv); 257 return ret; 258 } 259 priv->mac80211_registered = 1; 260 261 return 0; 262} 263 264void iwlagn_mac_unregister(struct iwl_priv *priv) 265{ 266 if (!priv->mac80211_registered) 267 return; 268 iwl_leds_exit(priv); 269 ieee80211_unregister_hw(priv->hw); 270 priv->mac80211_registered = 0; 271} 272 273static int __iwl_up(struct iwl_priv *priv) 274{ 275 struct iwl_rxon_context *ctx; 276 int ret; 277 278 lockdep_assert_held(&priv->mutex); 279 280 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) { 281 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n"); 282 return -EIO; 283 } 284 285 for_each_context(priv, ctx) { 286 ret = iwlagn_alloc_bcast_station(priv, ctx); 287 if (ret) { 288 iwl_dealloc_bcast_stations(priv); 289 return ret; 290 } 291 } 292 293 ret = iwl_run_init_ucode(priv); 294 if (ret) { 295 IWL_ERR(priv, "Failed to run INIT ucode: %d\n", ret); 296 goto error; 297 } 298 299 ret = iwl_load_ucode_wait_alive(priv, IWL_UCODE_REGULAR); 300 if (ret) { 301 IWL_ERR(priv, "Failed to start RT ucode: %d\n", ret); 302 goto error; 303 } 304 305 ret = iwl_alive_start(priv); 306 if (ret) 307 goto error; 308 return 0; 309 310 error: 311 set_bit(STATUS_EXIT_PENDING, &priv->status); 312 iwl_down(priv); 313 clear_bit(STATUS_EXIT_PENDING, &priv->status); 314 315 IWL_ERR(priv, "Unable to initialize device.\n"); 316 return ret; 317} 318 319static int iwlagn_mac_start(struct ieee80211_hw *hw) 320{ 321 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 322 int ret; 323 324 IWL_DEBUG_MAC80211(priv, "enter\n"); 325 326 /* we should be verifying the device is ready to be opened */ 327 mutex_lock(&priv->mutex); 328 ret = __iwl_up(priv); 329 mutex_unlock(&priv->mutex); 330 if (ret) 331 return ret; 332 333 IWL_DEBUG_INFO(priv, "Start UP work done.\n"); 334 335 /* Now we should be done, and the READY bit should be set. */ 336 if (WARN_ON(!test_bit(STATUS_READY, &priv->status))) 337 ret = -EIO; 338 339 iwlagn_led_enable(priv); 340 341 priv->is_open = 1; 342 IWL_DEBUG_MAC80211(priv, "leave\n"); 343 return 0; 344} 345 346static void iwlagn_mac_stop(struct ieee80211_hw *hw) 347{ 348 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 349 350 IWL_DEBUG_MAC80211(priv, "enter\n"); 351 352 if (!priv->is_open) 353 return; 354 355 priv->is_open = 0; 356 357 mutex_lock(&priv->mutex); 358 iwl_down(priv); 359 mutex_unlock(&priv->mutex); 360 361 iwl_cancel_deferred_work(priv); 362 363 flush_workqueue(priv->workqueue); 364 365 /* User space software may expect getting rfkill changes 366 * even if interface is down, trans->down will leave the RF 367 * kill interrupt enabled 368 */ 369 iwl_trans_stop_hw(priv->trans, false); 370 371 IWL_DEBUG_MAC80211(priv, "leave\n"); 372} 373 374static void iwlagn_mac_set_rekey_data(struct ieee80211_hw *hw, 375 struct ieee80211_vif *vif, 376 struct cfg80211_gtk_rekey_data *data) 377{ 378 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 379 380 if (iwlwifi_mod_params.sw_crypto) 381 return; 382 383 IWL_DEBUG_MAC80211(priv, "enter\n"); 384 mutex_lock(&priv->mutex); 385 386 if (priv->contexts[IWL_RXON_CTX_BSS].vif != vif) 387 goto out; 388 389 memcpy(priv->kek, data->kek, NL80211_KEK_LEN); 390 memcpy(priv->kck, data->kck, NL80211_KCK_LEN); 391 priv->replay_ctr = 392 cpu_to_le64(be64_to_cpup((__be64 *)&data->replay_ctr)); 393 priv->have_rekey_data = true; 394 395 out: 396 mutex_unlock(&priv->mutex); 397 IWL_DEBUG_MAC80211(priv, "leave\n"); 398} 399 400#ifdef CONFIG_PM_SLEEP 401 402static int iwlagn_mac_suspend(struct ieee80211_hw *hw, 403 struct cfg80211_wowlan *wowlan) 404{ 405 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 406 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS]; 407 int ret; 408 409 if (WARN_ON(!wowlan)) 410 return -EINVAL; 411 412 IWL_DEBUG_MAC80211(priv, "enter\n"); 413 mutex_lock(&priv->mutex); 414 415 /* Don't attempt WoWLAN when not associated, tear down instead. */ 416 if (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION || 417 !iwl_is_associated_ctx(ctx)) { 418 ret = 1; 419 goto out; 420 } 421 422 ret = iwlagn_suspend(priv, wowlan); 423 if (ret) 424 goto error; 425 426 iwl_trans_wowlan_suspend(priv->trans); 427 428 goto out; 429 430 error: 431 priv->wowlan = false; 432 iwlagn_prepare_restart(priv); 433 ieee80211_restart_hw(priv->hw); 434 out: 435 mutex_unlock(&priv->mutex); 436 IWL_DEBUG_MAC80211(priv, "leave\n"); 437 438 return ret; 439} 440 441static int iwlagn_mac_resume(struct ieee80211_hw *hw) 442{ 443 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 444 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS]; 445 struct ieee80211_vif *vif; 446 unsigned long flags; 447 u32 base, status = 0xffffffff; 448 int ret = -EIO; 449 450 IWL_DEBUG_MAC80211(priv, "enter\n"); 451 mutex_lock(&priv->mutex); 452 453 iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_CLR, 454 CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE); 455 456 base = priv->device_pointers.error_event_table; 457 if (iwlagn_hw_valid_rtc_data_addr(base)) { 458 spin_lock_irqsave(&priv->trans->reg_lock, flags); 459 ret = iwl_grab_nic_access_silent(priv->trans); 460 if (likely(ret == 0)) { 461 iwl_write32(priv->trans, HBUS_TARG_MEM_RADDR, base); 462 status = iwl_read32(priv->trans, HBUS_TARG_MEM_RDAT); 463 iwl_release_nic_access(priv->trans); 464 } 465 spin_unlock_irqrestore(&priv->trans->reg_lock, flags); 466 467#ifdef CONFIG_IWLWIFI_DEBUGFS 468 if (ret == 0) { 469 const struct fw_img *img; 470 471 img = &(priv->fw->img[IWL_UCODE_WOWLAN]); 472 if (!priv->wowlan_sram) { 473 priv->wowlan_sram = 474 kzalloc(img->sec[IWL_UCODE_SECTION_DATA].len, 475 GFP_KERNEL); 476 } 477 478 if (priv->wowlan_sram) 479 _iwl_read_targ_mem_dwords( 480 priv->trans, 0x800000, 481 priv->wowlan_sram, 482 img->sec[IWL_UCODE_SECTION_DATA].len / 4); 483 } 484#endif 485 } 486 487 /* we'll clear ctx->vif during iwlagn_prepare_restart() */ 488 vif = ctx->vif; 489 490 priv->wowlan = false; 491 492 iwlagn_prepare_restart(priv); 493 494 memset((void *)&ctx->active, 0, sizeof(ctx->active)); 495 iwl_connection_init_rx_config(priv, ctx); 496 iwlagn_set_rxon_chain(priv, ctx); 497 498 mutex_unlock(&priv->mutex); 499 IWL_DEBUG_MAC80211(priv, "leave\n"); 500 501 ieee80211_resume_disconnect(vif); 502 503 return 1; 504} 505 506static void iwlagn_mac_set_wakeup(struct ieee80211_hw *hw, bool enabled) 507{ 508 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 509 510 device_set_wakeup_enable(priv->trans->dev, enabled); 511} 512#endif 513 514static void iwlagn_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb) 515{ 516 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 517 518 IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len, 519 ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate); 520 521 if (iwlagn_tx_skb(priv, skb)) 522 dev_kfree_skb_any(skb); 523} 524 525static void iwlagn_mac_update_tkip_key(struct ieee80211_hw *hw, 526 struct ieee80211_vif *vif, 527 struct ieee80211_key_conf *keyconf, 528 struct ieee80211_sta *sta, 529 u32 iv32, u16 *phase1key) 530{ 531 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 532 533 iwl_update_tkip_key(priv, vif, keyconf, sta, iv32, phase1key); 534} 535 536static int iwlagn_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd, 537 struct ieee80211_vif *vif, 538 struct ieee80211_sta *sta, 539 struct ieee80211_key_conf *key) 540{ 541 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 542 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv; 543 struct iwl_rxon_context *ctx = vif_priv->ctx; 544 int ret; 545 bool is_default_wep_key = false; 546 547 IWL_DEBUG_MAC80211(priv, "enter\n"); 548 549 if (iwlwifi_mod_params.sw_crypto) { 550 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n"); 551 return -EOPNOTSUPP; 552 } 553 554 switch (key->cipher) { 555 case WLAN_CIPHER_SUITE_TKIP: 556 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC; 557 /* fall through */ 558 case WLAN_CIPHER_SUITE_CCMP: 559 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV; 560 break; 561 default: 562 break; 563 } 564 565 /* 566 * We could program these keys into the hardware as well, but we 567 * don't expect much multicast traffic in IBSS and having keys 568 * for more stations is probably more useful. 569 * 570 * Mark key TX-only and return 0. 571 */ 572 if (vif->type == NL80211_IFTYPE_ADHOC && 573 !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) { 574 key->hw_key_idx = WEP_INVALID_OFFSET; 575 return 0; 576 } 577 578 /* If they key was TX-only, accept deletion */ 579 if (cmd == DISABLE_KEY && key->hw_key_idx == WEP_INVALID_OFFSET) 580 return 0; 581 582 mutex_lock(&priv->mutex); 583 iwl_scan_cancel_timeout(priv, 100); 584 585 BUILD_BUG_ON(WEP_INVALID_OFFSET == IWLAGN_HW_KEY_DEFAULT); 586 587 /* 588 * If we are getting WEP group key and we didn't receive any key mapping 589 * so far, we are in legacy wep mode (group key only), otherwise we are 590 * in 1X mode. 591 * In legacy wep mode, we use another host command to the uCode. 592 */ 593 if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 || 594 key->cipher == WLAN_CIPHER_SUITE_WEP104) && !sta) { 595 if (cmd == SET_KEY) 596 is_default_wep_key = !ctx->key_mapping_keys; 597 else 598 is_default_wep_key = 599 key->hw_key_idx == IWLAGN_HW_KEY_DEFAULT; 600 } 601 602 603 switch (cmd) { 604 case SET_KEY: 605 if (is_default_wep_key) { 606 ret = iwl_set_default_wep_key(priv, vif_priv->ctx, key); 607 break; 608 } 609 ret = iwl_set_dynamic_key(priv, vif_priv->ctx, key, sta); 610 if (ret) { 611 /* 612 * can't add key for RX, but we don't need it 613 * in the device for TX so still return 0 614 */ 615 ret = 0; 616 key->hw_key_idx = WEP_INVALID_OFFSET; 617 } 618 619 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n"); 620 break; 621 case DISABLE_KEY: 622 if (is_default_wep_key) 623 ret = iwl_remove_default_wep_key(priv, ctx, key); 624 else 625 ret = iwl_remove_dynamic_key(priv, ctx, key, sta); 626 627 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n"); 628 break; 629 default: 630 ret = -EINVAL; 631 } 632 633 mutex_unlock(&priv->mutex); 634 IWL_DEBUG_MAC80211(priv, "leave\n"); 635 636 return ret; 637} 638 639static int iwlagn_mac_ampdu_action(struct ieee80211_hw *hw, 640 struct ieee80211_vif *vif, 641 enum ieee80211_ampdu_mlme_action action, 642 struct ieee80211_sta *sta, u16 tid, u16 *ssn, 643 u8 buf_size) 644{ 645 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 646 int ret = -EINVAL; 647 struct iwl_station_priv *sta_priv = (void *) sta->drv_priv; 648 649 IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n", 650 sta->addr, tid); 651 652 if (!(priv->eeprom_data->sku & EEPROM_SKU_CAP_11N_ENABLE)) 653 return -EACCES; 654 655 IWL_DEBUG_MAC80211(priv, "enter\n"); 656 mutex_lock(&priv->mutex); 657 658 switch (action) { 659 case IEEE80211_AMPDU_RX_START: 660 if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG) 661 break; 662 IWL_DEBUG_HT(priv, "start Rx\n"); 663 ret = iwl_sta_rx_agg_start(priv, sta, tid, *ssn); 664 break; 665 case IEEE80211_AMPDU_RX_STOP: 666 IWL_DEBUG_HT(priv, "stop Rx\n"); 667 ret = iwl_sta_rx_agg_stop(priv, sta, tid); 668 break; 669 case IEEE80211_AMPDU_TX_START: 670 if (!priv->trans->ops->txq_enable) 671 break; 672 if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG) 673 break; 674 IWL_DEBUG_HT(priv, "start Tx\n"); 675 ret = iwlagn_tx_agg_start(priv, vif, sta, tid, ssn); 676 break; 677 case IEEE80211_AMPDU_TX_STOP: 678 IWL_DEBUG_HT(priv, "stop Tx\n"); 679 ret = iwlagn_tx_agg_stop(priv, vif, sta, tid); 680 if ((ret == 0) && (priv->agg_tids_count > 0)) { 681 priv->agg_tids_count--; 682 IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n", 683 priv->agg_tids_count); 684 } 685 if (!priv->agg_tids_count && 686 priv->hw_params.use_rts_for_aggregation) { 687 /* 688 * switch off RTS/CTS if it was previously enabled 689 */ 690 sta_priv->lq_sta.lq.general_params.flags &= 691 ~LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK; 692 iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif), 693 &sta_priv->lq_sta.lq, CMD_ASYNC, false); 694 } 695 break; 696 case IEEE80211_AMPDU_TX_OPERATIONAL: 697 ret = iwlagn_tx_agg_oper(priv, vif, sta, tid, buf_size); 698 break; 699 } 700 mutex_unlock(&priv->mutex); 701 IWL_DEBUG_MAC80211(priv, "leave\n"); 702 return ret; 703} 704 705static int iwlagn_mac_sta_add(struct ieee80211_hw *hw, 706 struct ieee80211_vif *vif, 707 struct ieee80211_sta *sta) 708{ 709 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 710 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv; 711 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv; 712 bool is_ap = vif->type == NL80211_IFTYPE_STATION; 713 int ret; 714 u8 sta_id; 715 716 IWL_DEBUG_INFO(priv, "proceeding to add station %pM\n", 717 sta->addr); 718 sta_priv->sta_id = IWL_INVALID_STATION; 719 720 atomic_set(&sta_priv->pending_frames, 0); 721 if (vif->type == NL80211_IFTYPE_AP) 722 sta_priv->client = true; 723 724 ret = iwl_add_station_common(priv, vif_priv->ctx, sta->addr, 725 is_ap, sta, &sta_id); 726 if (ret) { 727 IWL_ERR(priv, "Unable to add station %pM (%d)\n", 728 sta->addr, ret); 729 /* Should we return success if return code is EEXIST ? */ 730 return ret; 731 } 732 733 sta_priv->sta_id = sta_id; 734 735 return 0; 736} 737 738static int iwlagn_mac_sta_remove(struct ieee80211_hw *hw, 739 struct ieee80211_vif *vif, 740 struct ieee80211_sta *sta) 741{ 742 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 743 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv; 744 int ret; 745 746 IWL_DEBUG_INFO(priv, "proceeding to remove station %pM\n", sta->addr); 747 748 if (vif->type == NL80211_IFTYPE_STATION) { 749 /* 750 * Station will be removed from device when the RXON 751 * is set to unassociated -- just deactivate it here 752 * to avoid re-programming it. 753 */ 754 ret = 0; 755 iwl_deactivate_station(priv, sta_priv->sta_id, sta->addr); 756 } else { 757 ret = iwl_remove_station(priv, sta_priv->sta_id, sta->addr); 758 if (ret) 759 IWL_DEBUG_QUIET_RFKILL(priv, 760 "Error removing station %pM\n", sta->addr); 761 } 762 return ret; 763} 764 765static int iwlagn_mac_sta_state(struct ieee80211_hw *hw, 766 struct ieee80211_vif *vif, 767 struct ieee80211_sta *sta, 768 enum ieee80211_sta_state old_state, 769 enum ieee80211_sta_state new_state) 770{ 771 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 772 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv; 773 enum { 774 NONE, ADD, REMOVE, HT_RATE_INIT, ADD_RATE_INIT, 775 } op = NONE; 776 int ret; 777 778 IWL_DEBUG_MAC80211(priv, "station %pM state change %d->%d\n", 779 sta->addr, old_state, new_state); 780 781 mutex_lock(&priv->mutex); 782 if (vif->type == NL80211_IFTYPE_STATION) { 783 if (old_state == IEEE80211_STA_NOTEXIST && 784 new_state == IEEE80211_STA_NONE) 785 op = ADD; 786 else if (old_state == IEEE80211_STA_NONE && 787 new_state == IEEE80211_STA_NOTEXIST) 788 op = REMOVE; 789 else if (old_state == IEEE80211_STA_AUTH && 790 new_state == IEEE80211_STA_ASSOC) 791 op = HT_RATE_INIT; 792 } else { 793 if (old_state == IEEE80211_STA_AUTH && 794 new_state == IEEE80211_STA_ASSOC) 795 op = ADD_RATE_INIT; 796 else if (old_state == IEEE80211_STA_ASSOC && 797 new_state == IEEE80211_STA_AUTH) 798 op = REMOVE; 799 } 800 801 switch (op) { 802 case ADD: 803 ret = iwlagn_mac_sta_add(hw, vif, sta); 804 break; 805 case REMOVE: 806 ret = iwlagn_mac_sta_remove(hw, vif, sta); 807 break; 808 case ADD_RATE_INIT: 809 ret = iwlagn_mac_sta_add(hw, vif, sta); 810 if (ret) 811 break; 812 /* Initialize rate scaling */ 813 IWL_DEBUG_INFO(priv, 814 "Initializing rate scaling for station %pM\n", 815 sta->addr); 816 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta)); 817 ret = 0; 818 break; 819 case HT_RATE_INIT: 820 /* Initialize rate scaling */ 821 ret = iwl_sta_update_ht(priv, vif_priv->ctx, sta); 822 if (ret) 823 break; 824 IWL_DEBUG_INFO(priv, 825 "Initializing rate scaling for station %pM\n", 826 sta->addr); 827 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta)); 828 ret = 0; 829 break; 830 default: 831 ret = 0; 832 break; 833 } 834 835 /* 836 * mac80211 might WARN if we fail, but due the way we 837 * (badly) handle hard rfkill, we might fail here 838 */ 839 if (iwl_is_rfkill(priv)) 840 ret = 0; 841 842 mutex_unlock(&priv->mutex); 843 IWL_DEBUG_MAC80211(priv, "leave\n"); 844 845 return ret; 846} 847 848static void iwlagn_mac_channel_switch(struct ieee80211_hw *hw, 849 struct ieee80211_channel_switch *ch_switch) 850{ 851 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 852 struct ieee80211_conf *conf = &hw->conf; 853 struct ieee80211_channel *channel = ch_switch->channel; 854 struct iwl_ht_config *ht_conf = &priv->current_ht_config; 855 /* 856 * MULTI-FIXME 857 * When we add support for multiple interfaces, we need to 858 * revisit this. The channel switch command in the device 859 * only affects the BSS context, but what does that really 860 * mean? And what if we get a CSA on the second interface? 861 * This needs a lot of work. 862 */ 863 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS]; 864 u16 ch; 865 866 IWL_DEBUG_MAC80211(priv, "enter\n"); 867 868 mutex_lock(&priv->mutex); 869 870 if (iwl_is_rfkill(priv)) 871 goto out; 872 873 if (test_bit(STATUS_EXIT_PENDING, &priv->status) || 874 test_bit(STATUS_SCANNING, &priv->status) || 875 test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status)) 876 goto out; 877 878 if (!iwl_is_associated_ctx(ctx)) 879 goto out; 880 881 if (!priv->lib->set_channel_switch) 882 goto out; 883 884 ch = channel->hw_value; 885 if (le16_to_cpu(ctx->active.channel) == ch) 886 goto out; 887 888 priv->current_ht_config.smps = conf->smps_mode; 889 890 /* Configure HT40 channels */ 891 ctx->ht.enabled = conf_is_ht(conf); 892 if (ctx->ht.enabled) 893 iwlagn_config_ht40(conf, ctx); 894 else 895 ctx->ht.is_40mhz = false; 896 897 if ((le16_to_cpu(ctx->staging.channel) != ch)) 898 ctx->staging.flags = 0; 899 900 iwl_set_rxon_channel(priv, channel, ctx); 901 iwl_set_rxon_ht(priv, ht_conf); 902 iwl_set_flags_for_band(priv, ctx, channel->band, ctx->vif); 903 904 /* 905 * at this point, staging_rxon has the 906 * configuration for channel switch 907 */ 908 set_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status); 909 priv->switch_channel = cpu_to_le16(ch); 910 if (priv->lib->set_channel_switch(priv, ch_switch)) { 911 clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status); 912 priv->switch_channel = 0; 913 ieee80211_chswitch_done(ctx->vif, false); 914 } 915 916out: 917 mutex_unlock(&priv->mutex); 918 IWL_DEBUG_MAC80211(priv, "leave\n"); 919} 920 921void iwl_chswitch_done(struct iwl_priv *priv, bool is_success) 922{ 923 /* 924 * MULTI-FIXME 925 * See iwlagn_mac_channel_switch. 926 */ 927 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS]; 928 929 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) 930 return; 931 932 if (test_and_clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status)) 933 ieee80211_chswitch_done(ctx->vif, is_success); 934} 935 936static void iwlagn_configure_filter(struct ieee80211_hw *hw, 937 unsigned int changed_flags, 938 unsigned int *total_flags, 939 u64 multicast) 940{ 941 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 942 __le32 filter_or = 0, filter_nand = 0; 943 struct iwl_rxon_context *ctx; 944 945#define CHK(test, flag) do { \ 946 if (*total_flags & (test)) \ 947 filter_or |= (flag); \ 948 else \ 949 filter_nand |= (flag); \ 950 } while (0) 951 952 IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n", 953 changed_flags, *total_flags); 954 955 CHK(FIF_OTHER_BSS | FIF_PROMISC_IN_BSS, RXON_FILTER_PROMISC_MSK); 956 /* Setting _just_ RXON_FILTER_CTL2HOST_MSK causes FH errors */ 957 CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_PROMISC_MSK); 958 CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK); 959 960#undef CHK 961 962 mutex_lock(&priv->mutex); 963 964 for_each_context(priv, ctx) { 965 ctx->staging.filter_flags &= ~filter_nand; 966 ctx->staging.filter_flags |= filter_or; 967 968 /* 969 * Not committing directly because hardware can perform a scan, 970 * but we'll eventually commit the filter flags change anyway. 971 */ 972 } 973 974 mutex_unlock(&priv->mutex); 975 976 /* 977 * Receiving all multicast frames is always enabled by the 978 * default flags setup in iwl_connection_init_rx_config() 979 * since we currently do not support programming multicast 980 * filters into the device. 981 */ 982 *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS | 983 FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL; 984} 985 986static void iwlagn_mac_flush(struct ieee80211_hw *hw, bool drop) 987{ 988 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 989 990 mutex_lock(&priv->mutex); 991 IWL_DEBUG_MAC80211(priv, "enter\n"); 992 993 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) { 994 IWL_DEBUG_TX(priv, "Aborting flush due to device shutdown\n"); 995 goto done; 996 } 997 if (iwl_is_rfkill(priv)) { 998 IWL_DEBUG_TX(priv, "Aborting flush due to RF Kill\n"); 999 goto done; 1000 } 1001 1002 /* 1003 * mac80211 will not push any more frames for transmit 1004 * until the flush is completed 1005 */ 1006 if (drop) { 1007 IWL_DEBUG_MAC80211(priv, "send flush command\n"); 1008 if (iwlagn_txfifo_flush(priv, IWL_DROP_ALL)) { 1009 IWL_ERR(priv, "flush request fail\n"); 1010 goto done; 1011 } 1012 } 1013 IWL_DEBUG_MAC80211(priv, "wait transmit/flush all frames\n"); 1014 iwl_trans_wait_tx_queue_empty(priv->trans); 1015done: 1016 mutex_unlock(&priv->mutex); 1017 IWL_DEBUG_MAC80211(priv, "leave\n"); 1018} 1019 1020static int iwlagn_mac_remain_on_channel(struct ieee80211_hw *hw, 1021 struct ieee80211_channel *channel, 1022 enum nl80211_channel_type channel_type, 1023 int duration) 1024{ 1025 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1026 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_PAN]; 1027 int err = 0; 1028 1029 if (!(priv->valid_contexts & BIT(IWL_RXON_CTX_PAN))) 1030 return -EOPNOTSUPP; 1031 1032 if (!(ctx->interface_modes & BIT(NL80211_IFTYPE_P2P_CLIENT))) 1033 return -EOPNOTSUPP; 1034 1035 IWL_DEBUG_MAC80211(priv, "enter\n"); 1036 mutex_lock(&priv->mutex); 1037 1038 if (test_bit(STATUS_SCAN_HW, &priv->status)) { 1039 /* mac80211 should not scan while ROC or ROC while scanning */ 1040 if (WARN_ON_ONCE(priv->scan_type != IWL_SCAN_RADIO_RESET)) { 1041 err = -EBUSY; 1042 goto out; 1043 } 1044 1045 iwl_scan_cancel_timeout(priv, 100); 1046 1047 if (test_bit(STATUS_SCAN_HW, &priv->status)) { 1048 err = -EBUSY; 1049 goto out; 1050 } 1051 } 1052 1053 priv->hw_roc_channel = channel; 1054 priv->hw_roc_chantype = channel_type; 1055 /* convert from ms to TU */ 1056 priv->hw_roc_duration = DIV_ROUND_UP(1000 * duration, 1024); 1057 priv->hw_roc_start_notified = false; 1058 cancel_delayed_work(&priv->hw_roc_disable_work); 1059 1060 if (!ctx->is_active) { 1061 static const struct iwl_qos_info default_qos_data = { 1062 .def_qos_parm = { 1063 .ac[0] = { 1064 .cw_min = cpu_to_le16(3), 1065 .cw_max = cpu_to_le16(7), 1066 .aifsn = 2, 1067 .edca_txop = cpu_to_le16(1504), 1068 }, 1069 .ac[1] = { 1070 .cw_min = cpu_to_le16(7), 1071 .cw_max = cpu_to_le16(15), 1072 .aifsn = 2, 1073 .edca_txop = cpu_to_le16(3008), 1074 }, 1075 .ac[2] = { 1076 .cw_min = cpu_to_le16(15), 1077 .cw_max = cpu_to_le16(1023), 1078 .aifsn = 3, 1079 }, 1080 .ac[3] = { 1081 .cw_min = cpu_to_le16(15), 1082 .cw_max = cpu_to_le16(1023), 1083 .aifsn = 7, 1084 }, 1085 }, 1086 }; 1087 1088 ctx->is_active = true; 1089 ctx->qos_data = default_qos_data; 1090 ctx->staging.dev_type = RXON_DEV_TYPE_P2P; 1091 memcpy(ctx->staging.node_addr, 1092 priv->contexts[IWL_RXON_CTX_BSS].staging.node_addr, 1093 ETH_ALEN); 1094 memcpy(ctx->staging.bssid_addr, 1095 priv->contexts[IWL_RXON_CTX_BSS].staging.node_addr, 1096 ETH_ALEN); 1097 err = iwlagn_commit_rxon(priv, ctx); 1098 if (err) 1099 goto out; 1100 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK | 1101 RXON_FILTER_PROMISC_MSK | 1102 RXON_FILTER_CTL2HOST_MSK; 1103 1104 err = iwlagn_commit_rxon(priv, ctx); 1105 if (err) { 1106 iwlagn_disable_roc(priv); 1107 goto out; 1108 } 1109 priv->hw_roc_setup = true; 1110 } 1111 1112 err = iwl_scan_initiate(priv, ctx->vif, IWL_SCAN_ROC, channel->band); 1113 if (err) 1114 iwlagn_disable_roc(priv); 1115 1116 out: 1117 mutex_unlock(&priv->mutex); 1118 IWL_DEBUG_MAC80211(priv, "leave\n"); 1119 1120 return err; 1121} 1122 1123static int iwlagn_mac_cancel_remain_on_channel(struct ieee80211_hw *hw) 1124{ 1125 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1126 1127 if (!(priv->valid_contexts & BIT(IWL_RXON_CTX_PAN))) 1128 return -EOPNOTSUPP; 1129 1130 IWL_DEBUG_MAC80211(priv, "enter\n"); 1131 mutex_lock(&priv->mutex); 1132 iwl_scan_cancel_timeout(priv, priv->hw_roc_duration); 1133 iwlagn_disable_roc(priv); 1134 mutex_unlock(&priv->mutex); 1135 IWL_DEBUG_MAC80211(priv, "leave\n"); 1136 1137 return 0; 1138} 1139 1140static void iwlagn_mac_rssi_callback(struct ieee80211_hw *hw, 1141 enum ieee80211_rssi_event rssi_event) 1142{ 1143 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1144 1145 IWL_DEBUG_MAC80211(priv, "enter\n"); 1146 mutex_lock(&priv->mutex); 1147 1148 if (priv->cfg->bt_params && 1149 priv->cfg->bt_params->advanced_bt_coexist) { 1150 if (rssi_event == RSSI_EVENT_LOW) 1151 priv->bt_enable_pspoll = true; 1152 else if (rssi_event == RSSI_EVENT_HIGH) 1153 priv->bt_enable_pspoll = false; 1154 1155 iwlagn_send_advance_bt_config(priv); 1156 } else { 1157 IWL_DEBUG_MAC80211(priv, "Advanced BT coex disabled," 1158 "ignoring RSSI callback\n"); 1159 } 1160 1161 mutex_unlock(&priv->mutex); 1162 IWL_DEBUG_MAC80211(priv, "leave\n"); 1163} 1164 1165static int iwlagn_mac_set_tim(struct ieee80211_hw *hw, 1166 struct ieee80211_sta *sta, bool set) 1167{ 1168 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1169 1170 queue_work(priv->workqueue, &priv->beacon_update); 1171 1172 return 0; 1173} 1174 1175static int iwlagn_mac_conf_tx(struct ieee80211_hw *hw, 1176 struct ieee80211_vif *vif, u16 queue, 1177 const struct ieee80211_tx_queue_params *params) 1178{ 1179 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1180 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv; 1181 struct iwl_rxon_context *ctx = vif_priv->ctx; 1182 int q; 1183 1184 if (WARN_ON(!ctx)) 1185 return -EINVAL; 1186 1187 IWL_DEBUG_MAC80211(priv, "enter\n"); 1188 1189 if (!iwl_is_ready_rf(priv)) { 1190 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n"); 1191 return -EIO; 1192 } 1193 1194 if (queue >= AC_NUM) { 1195 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue); 1196 return 0; 1197 } 1198 1199 q = AC_NUM - 1 - queue; 1200 1201 mutex_lock(&priv->mutex); 1202 1203 ctx->qos_data.def_qos_parm.ac[q].cw_min = 1204 cpu_to_le16(params->cw_min); 1205 ctx->qos_data.def_qos_parm.ac[q].cw_max = 1206 cpu_to_le16(params->cw_max); 1207 ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs; 1208 ctx->qos_data.def_qos_parm.ac[q].edca_txop = 1209 cpu_to_le16((params->txop * 32)); 1210 1211 ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0; 1212 1213 mutex_unlock(&priv->mutex); 1214 1215 IWL_DEBUG_MAC80211(priv, "leave\n"); 1216 return 0; 1217} 1218 1219static int iwlagn_mac_tx_last_beacon(struct ieee80211_hw *hw) 1220{ 1221 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1222 1223 return priv->ibss_manager == IWL_IBSS_MANAGER; 1224} 1225 1226static int iwl_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx) 1227{ 1228 iwl_connection_init_rx_config(priv, ctx); 1229 1230 iwlagn_set_rxon_chain(priv, ctx); 1231 1232 return iwlagn_commit_rxon(priv, ctx); 1233} 1234 1235static int iwl_setup_interface(struct iwl_priv *priv, 1236 struct iwl_rxon_context *ctx) 1237{ 1238 struct ieee80211_vif *vif = ctx->vif; 1239 int err, ac; 1240 1241 lockdep_assert_held(&priv->mutex); 1242 1243 /* 1244 * This variable will be correct only when there's just 1245 * a single context, but all code using it is for hardware 1246 * that supports only one context. 1247 */ 1248 priv->iw_mode = vif->type; 1249 1250 ctx->is_active = true; 1251 1252 err = iwl_set_mode(priv, ctx); 1253 if (err) { 1254 if (!ctx->always_active) 1255 ctx->is_active = false; 1256 return err; 1257 } 1258 1259 if (priv->cfg->bt_params && priv->cfg->bt_params->advanced_bt_coexist && 1260 vif->type == NL80211_IFTYPE_ADHOC) { 1261 /* 1262 * pretend to have high BT traffic as long as we 1263 * are operating in IBSS mode, as this will cause 1264 * the rate scaling etc. to behave as intended. 1265 */ 1266 priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH; 1267 } 1268 1269 /* set up queue mappings */ 1270 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 1271 vif->hw_queue[ac] = ctx->ac_to_queue[ac]; 1272 1273 if (vif->type == NL80211_IFTYPE_AP) 1274 vif->cab_queue = ctx->mcast_queue; 1275 else 1276 vif->cab_queue = IEEE80211_INVAL_HW_QUEUE; 1277 1278 return 0; 1279} 1280 1281static int iwlagn_mac_add_interface(struct ieee80211_hw *hw, 1282 struct ieee80211_vif *vif) 1283{ 1284 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1285 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv; 1286 struct iwl_rxon_context *tmp, *ctx = NULL; 1287 int err; 1288 enum nl80211_iftype viftype = ieee80211_vif_type_p2p(vif); 1289 bool reset = false; 1290 1291 IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n", 1292 viftype, vif->addr); 1293 1294 cancel_delayed_work_sync(&priv->hw_roc_disable_work); 1295 1296 mutex_lock(&priv->mutex); 1297 1298 iwlagn_disable_roc(priv); 1299 1300 if (!iwl_is_ready_rf(priv)) { 1301 IWL_WARN(priv, "Try to add interface when device not ready\n"); 1302 err = -EINVAL; 1303 goto out; 1304 } 1305 1306 for_each_context(priv, tmp) { 1307 u32 possible_modes = 1308 tmp->interface_modes | tmp->exclusive_interface_modes; 1309 1310 if (tmp->vif) { 1311 /* On reset we need to add the same interface again */ 1312 if (tmp->vif == vif) { 1313 reset = true; 1314 ctx = tmp; 1315 break; 1316 } 1317 1318 /* check if this busy context is exclusive */ 1319 if (tmp->exclusive_interface_modes & 1320 BIT(tmp->vif->type)) { 1321 err = -EINVAL; 1322 goto out; 1323 } 1324 continue; 1325 } 1326 1327 if (!(possible_modes & BIT(viftype))) 1328 continue; 1329 1330 /* have maybe usable context w/o interface */ 1331 ctx = tmp; 1332 break; 1333 } 1334 1335 if (!ctx) { 1336 err = -EOPNOTSUPP; 1337 goto out; 1338 } 1339 1340 vif_priv->ctx = ctx; 1341 ctx->vif = vif; 1342 1343 err = iwl_setup_interface(priv, ctx); 1344 if (!err || reset) 1345 goto out; 1346 1347 ctx->vif = NULL; 1348 priv->iw_mode = NL80211_IFTYPE_STATION; 1349 out: 1350 mutex_unlock(&priv->mutex); 1351 1352 IWL_DEBUG_MAC80211(priv, "leave\n"); 1353 return err; 1354} 1355 1356static void iwl_teardown_interface(struct iwl_priv *priv, 1357 struct ieee80211_vif *vif, 1358 bool mode_change) 1359{ 1360 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif); 1361 1362 lockdep_assert_held(&priv->mutex); 1363 1364 if (priv->scan_vif == vif) { 1365 iwl_scan_cancel_timeout(priv, 200); 1366 iwl_force_scan_end(priv); 1367 } 1368 1369 if (!mode_change) { 1370 iwl_set_mode(priv, ctx); 1371 if (!ctx->always_active) 1372 ctx->is_active = false; 1373 } 1374 1375 /* 1376 * When removing the IBSS interface, overwrite the 1377 * BT traffic load with the stored one from the last 1378 * notification, if any. If this is a device that 1379 * doesn't implement this, this has no effect since 1380 * both values are the same and zero. 1381 */ 1382 if (vif->type == NL80211_IFTYPE_ADHOC) 1383 priv->bt_traffic_load = priv->last_bt_traffic_load; 1384} 1385 1386static void iwlagn_mac_remove_interface(struct ieee80211_hw *hw, 1387 struct ieee80211_vif *vif) 1388{ 1389 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1390 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif); 1391 1392 IWL_DEBUG_MAC80211(priv, "enter\n"); 1393 1394 mutex_lock(&priv->mutex); 1395 1396 if (WARN_ON(ctx->vif != vif)) { 1397 struct iwl_rxon_context *tmp; 1398 IWL_ERR(priv, "ctx->vif = %p, vif = %p\n", ctx->vif, vif); 1399 for_each_context(priv, tmp) 1400 IWL_ERR(priv, "\tID = %d:\tctx = %p\tctx->vif = %p\n", 1401 tmp->ctxid, tmp, tmp->vif); 1402 } 1403 ctx->vif = NULL; 1404 1405 iwl_teardown_interface(priv, vif, false); 1406 1407 mutex_unlock(&priv->mutex); 1408 1409 IWL_DEBUG_MAC80211(priv, "leave\n"); 1410 1411} 1412 1413static int iwlagn_mac_change_interface(struct ieee80211_hw *hw, 1414 struct ieee80211_vif *vif, 1415 enum nl80211_iftype newtype, bool newp2p) 1416{ 1417 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1418 struct iwl_rxon_context *ctx, *tmp; 1419 enum nl80211_iftype newviftype = newtype; 1420 u32 interface_modes; 1421 int err; 1422 1423 IWL_DEBUG_MAC80211(priv, "enter\n"); 1424 1425 newtype = ieee80211_iftype_p2p(newtype, newp2p); 1426 1427 mutex_lock(&priv->mutex); 1428 1429 ctx = iwl_rxon_ctx_from_vif(vif); 1430 1431 /* 1432 * To simplify this code, only support changes on the 1433 * BSS context. The PAN context is usually reassigned 1434 * by creating/removing P2P interfaces anyway. 1435 */ 1436 if (ctx->ctxid != IWL_RXON_CTX_BSS) { 1437 err = -EBUSY; 1438 goto out; 1439 } 1440 1441 if (!ctx->vif || !iwl_is_ready_rf(priv)) { 1442 /* 1443 * Huh? But wait ... this can maybe happen when 1444 * we're in the middle of a firmware restart! 1445 */ 1446 err = -EBUSY; 1447 goto out; 1448 } 1449 1450 /* Check if the switch is supported in the same context */ 1451 interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes; 1452 if (!(interface_modes & BIT(newtype))) { 1453 err = -EBUSY; 1454 goto out; 1455 } 1456 1457 if (ctx->exclusive_interface_modes & BIT(newtype)) { 1458 for_each_context(priv, tmp) { 1459 if (ctx == tmp) 1460 continue; 1461 1462 if (!tmp->is_active) 1463 continue; 1464 1465 /* 1466 * The current mode switch would be exclusive, but 1467 * another context is active ... refuse the switch. 1468 */ 1469 err = -EBUSY; 1470 goto out; 1471 } 1472 } 1473 1474 /* success */ 1475 iwl_teardown_interface(priv, vif, true); 1476 vif->type = newviftype; 1477 vif->p2p = newp2p; 1478 err = iwl_setup_interface(priv, ctx); 1479 WARN_ON(err); 1480 /* 1481 * We've switched internally, but submitting to the 1482 * device may have failed for some reason. Mask this 1483 * error, because otherwise mac80211 will not switch 1484 * (and set the interface type back) and we'll be 1485 * out of sync with it. 1486 */ 1487 err = 0; 1488 1489 out: 1490 mutex_unlock(&priv->mutex); 1491 IWL_DEBUG_MAC80211(priv, "leave\n"); 1492 1493 return err; 1494} 1495 1496static int iwlagn_mac_hw_scan(struct ieee80211_hw *hw, 1497 struct ieee80211_vif *vif, 1498 struct cfg80211_scan_request *req) 1499{ 1500 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1501 int ret; 1502 1503 IWL_DEBUG_MAC80211(priv, "enter\n"); 1504 1505 if (req->n_channels == 0) 1506 return -EINVAL; 1507 1508 mutex_lock(&priv->mutex); 1509 1510 /* 1511 * If an internal scan is in progress, just set 1512 * up the scan_request as per above. 1513 */ 1514 if (priv->scan_type != IWL_SCAN_NORMAL) { 1515 IWL_DEBUG_SCAN(priv, 1516 "SCAN request during internal scan - defer\n"); 1517 priv->scan_request = req; 1518 priv->scan_vif = vif; 1519 ret = 0; 1520 } else { 1521 priv->scan_request = req; 1522 priv->scan_vif = vif; 1523 /* 1524 * mac80211 will only ask for one band at a time 1525 * so using channels[0] here is ok 1526 */ 1527 ret = iwl_scan_initiate(priv, vif, IWL_SCAN_NORMAL, 1528 req->channels[0]->band); 1529 if (ret) { 1530 priv->scan_request = NULL; 1531 priv->scan_vif = NULL; 1532 } 1533 } 1534 1535 IWL_DEBUG_MAC80211(priv, "leave\n"); 1536 1537 mutex_unlock(&priv->mutex); 1538 1539 return ret; 1540} 1541 1542static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id) 1543{ 1544 struct iwl_addsta_cmd cmd = { 1545 .mode = STA_CONTROL_MODIFY_MSK, 1546 .station_flags_msk = STA_FLG_PWR_SAVE_MSK, 1547 .sta.sta_id = sta_id, 1548 }; 1549 1550 iwl_send_add_sta(priv, &cmd, CMD_ASYNC); 1551} 1552 1553static void iwlagn_mac_sta_notify(struct ieee80211_hw *hw, 1554 struct ieee80211_vif *vif, 1555 enum sta_notify_cmd cmd, 1556 struct ieee80211_sta *sta) 1557{ 1558 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1559 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv; 1560 int sta_id; 1561 1562 IWL_DEBUG_MAC80211(priv, "enter\n"); 1563 1564 switch (cmd) { 1565 case STA_NOTIFY_SLEEP: 1566 WARN_ON(!sta_priv->client); 1567 sta_priv->asleep = true; 1568 if (atomic_read(&sta_priv->pending_frames) > 0) 1569 ieee80211_sta_block_awake(hw, sta, true); 1570 break; 1571 case STA_NOTIFY_AWAKE: 1572 WARN_ON(!sta_priv->client); 1573 if (!sta_priv->asleep) 1574 break; 1575 sta_priv->asleep = false; 1576 sta_id = iwl_sta_id(sta); 1577 if (sta_id != IWL_INVALID_STATION) 1578 iwl_sta_modify_ps_wake(priv, sta_id); 1579 break; 1580 default: 1581 break; 1582 } 1583 IWL_DEBUG_MAC80211(priv, "leave\n"); 1584} 1585 1586struct ieee80211_ops iwlagn_hw_ops = { 1587 .tx = iwlagn_mac_tx, 1588 .start = iwlagn_mac_start, 1589 .stop = iwlagn_mac_stop, 1590#ifdef CONFIG_PM_SLEEP 1591 .suspend = iwlagn_mac_suspend, 1592 .resume = iwlagn_mac_resume, 1593 .set_wakeup = iwlagn_mac_set_wakeup, 1594#endif 1595 .add_interface = iwlagn_mac_add_interface, 1596 .remove_interface = iwlagn_mac_remove_interface, 1597 .change_interface = iwlagn_mac_change_interface, 1598 .config = iwlagn_mac_config, 1599 .configure_filter = iwlagn_configure_filter, 1600 .set_key = iwlagn_mac_set_key, 1601 .update_tkip_key = iwlagn_mac_update_tkip_key, 1602 .set_rekey_data = iwlagn_mac_set_rekey_data, 1603 .conf_tx = iwlagn_mac_conf_tx, 1604 .bss_info_changed = iwlagn_bss_info_changed, 1605 .ampdu_action = iwlagn_mac_ampdu_action, 1606 .hw_scan = iwlagn_mac_hw_scan, 1607 .sta_notify = iwlagn_mac_sta_notify, 1608 .sta_state = iwlagn_mac_sta_state, 1609 .channel_switch = iwlagn_mac_channel_switch, 1610 .flush = iwlagn_mac_flush, 1611 .tx_last_beacon = iwlagn_mac_tx_last_beacon, 1612 .remain_on_channel = iwlagn_mac_remain_on_channel, 1613 .cancel_remain_on_channel = iwlagn_mac_cancel_remain_on_channel, 1614 .rssi_callback = iwlagn_mac_rssi_callback, 1615 CFG80211_TESTMODE_CMD(iwlagn_mac_testmode_cmd) 1616 CFG80211_TESTMODE_DUMP(iwlagn_mac_testmode_dump) 1617 .set_tim = iwlagn_mac_set_tim, 1618}; 1619 1620/* This function both allocates and initializes hw and priv. */ 1621struct ieee80211_hw *iwl_alloc_all(void) 1622{ 1623 struct iwl_priv *priv; 1624 struct iwl_op_mode *op_mode; 1625 /* mac80211 allocates memory for this device instance, including 1626 * space for this driver's private structure */ 1627 struct ieee80211_hw *hw; 1628 1629 hw = ieee80211_alloc_hw(sizeof(struct iwl_priv) + 1630 sizeof(struct iwl_op_mode), &iwlagn_hw_ops); 1631 if (!hw) 1632 goto out; 1633 1634 op_mode = hw->priv; 1635 priv = IWL_OP_MODE_GET_DVM(op_mode); 1636 priv->hw = hw; 1637 1638out: 1639 return hw; 1640} 1641