mac80211.c revision 887da9176e011a044b12ec0deff62df5faadd67c
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->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->wowlan_suspend && 210 device_can_wakeup(priv->trans->dev)) { 211 hw->wiphy->wowlan.flags = WIPHY_WOWLAN_MAGIC_PKT | 212 WIPHY_WOWLAN_DISCONNECT | 213 WIPHY_WOWLAN_EAP_IDENTITY_REQ | 214 WIPHY_WOWLAN_RFKILL_RELEASE; 215 if (!iwlwifi_mod_params.sw_crypto) 216 hw->wiphy->wowlan.flags |= 217 WIPHY_WOWLAN_SUPPORTS_GTK_REKEY | 218 WIPHY_WOWLAN_GTK_REKEY_FAILURE; 219 220 hw->wiphy->wowlan.n_patterns = IWLAGN_WOWLAN_MAX_PATTERNS; 221 hw->wiphy->wowlan.pattern_min_len = 222 IWLAGN_WOWLAN_MIN_PATTERN_LEN; 223 hw->wiphy->wowlan.pattern_max_len = 224 IWLAGN_WOWLAN_MAX_PATTERN_LEN; 225 } 226#endif 227 228 if (iwlwifi_mod_params.power_save) 229 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT; 230 else 231 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT; 232 233 hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX; 234 /* we create the 802.11 header and a max-length SSID element */ 235 hw->wiphy->max_scan_ie_len = capa->max_probe_length - 24 - 34; 236 237 /* 238 * We don't use all queues: 4 and 9 are unused and any 239 * aggregation queue gets mapped down to the AC queue. 240 */ 241 hw->queues = IWLAGN_FIRST_AMPDU_QUEUE; 242 243 hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL; 244 245 if (priv->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels) 246 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = 247 &priv->nvm_data->bands[IEEE80211_BAND_2GHZ]; 248 if (priv->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels) 249 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] = 250 &priv->nvm_data->bands[IEEE80211_BAND_5GHZ]; 251 252 hw->wiphy->hw_version = priv->trans->hw_id; 253 254 iwl_leds_init(priv); 255 256 ret = ieee80211_register_hw(priv->hw); 257 if (ret) { 258 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret); 259 iwl_leds_exit(priv); 260 return ret; 261 } 262 priv->mac80211_registered = 1; 263 264 return 0; 265} 266 267void iwlagn_mac_unregister(struct iwl_priv *priv) 268{ 269 if (!priv->mac80211_registered) 270 return; 271 iwl_leds_exit(priv); 272 ieee80211_unregister_hw(priv->hw); 273 priv->mac80211_registered = 0; 274} 275 276static int __iwl_up(struct iwl_priv *priv) 277{ 278 struct iwl_rxon_context *ctx; 279 int ret; 280 281 lockdep_assert_held(&priv->mutex); 282 283 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) { 284 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n"); 285 return -EIO; 286 } 287 288 for_each_context(priv, ctx) { 289 ret = iwlagn_alloc_bcast_station(priv, ctx); 290 if (ret) { 291 iwl_dealloc_bcast_stations(priv); 292 return ret; 293 } 294 } 295 296 ret = iwl_run_init_ucode(priv); 297 if (ret) { 298 IWL_ERR(priv, "Failed to run INIT ucode: %d\n", ret); 299 goto error; 300 } 301 302 ret = iwl_load_ucode_wait_alive(priv, IWL_UCODE_REGULAR); 303 if (ret) { 304 IWL_ERR(priv, "Failed to start RT ucode: %d\n", ret); 305 goto error; 306 } 307 308 ret = iwl_alive_start(priv); 309 if (ret) 310 goto error; 311 return 0; 312 313 error: 314 set_bit(STATUS_EXIT_PENDING, &priv->status); 315 iwl_down(priv); 316 clear_bit(STATUS_EXIT_PENDING, &priv->status); 317 318 IWL_ERR(priv, "Unable to initialize device.\n"); 319 return ret; 320} 321 322static int iwlagn_mac_start(struct ieee80211_hw *hw) 323{ 324 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 325 int ret; 326 327 IWL_DEBUG_MAC80211(priv, "enter\n"); 328 329 /* we should be verifying the device is ready to be opened */ 330 mutex_lock(&priv->mutex); 331 ret = __iwl_up(priv); 332 mutex_unlock(&priv->mutex); 333 if (ret) 334 return ret; 335 336 IWL_DEBUG_INFO(priv, "Start UP work done.\n"); 337 338 /* Now we should be done, and the READY bit should be set. */ 339 if (WARN_ON(!test_bit(STATUS_READY, &priv->status))) 340 ret = -EIO; 341 342 iwlagn_led_enable(priv); 343 344 priv->is_open = 1; 345 IWL_DEBUG_MAC80211(priv, "leave\n"); 346 return 0; 347} 348 349static void iwlagn_mac_stop(struct ieee80211_hw *hw) 350{ 351 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 352 353 IWL_DEBUG_MAC80211(priv, "enter\n"); 354 355 if (!priv->is_open) 356 return; 357 358 priv->is_open = 0; 359 360 mutex_lock(&priv->mutex); 361 iwl_down(priv); 362 mutex_unlock(&priv->mutex); 363 364 iwl_cancel_deferred_work(priv); 365 366 flush_workqueue(priv->workqueue); 367 368 /* User space software may expect getting rfkill changes 369 * even if interface is down, trans->down will leave the RF 370 * kill interrupt enabled 371 */ 372 iwl_trans_stop_hw(priv->trans, false); 373 374 IWL_DEBUG_MAC80211(priv, "leave\n"); 375} 376 377static void iwlagn_mac_set_rekey_data(struct ieee80211_hw *hw, 378 struct ieee80211_vif *vif, 379 struct cfg80211_gtk_rekey_data *data) 380{ 381 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 382 383 if (iwlwifi_mod_params.sw_crypto) 384 return; 385 386 IWL_DEBUG_MAC80211(priv, "enter\n"); 387 mutex_lock(&priv->mutex); 388 389 if (priv->contexts[IWL_RXON_CTX_BSS].vif != vif) 390 goto out; 391 392 memcpy(priv->kek, data->kek, NL80211_KEK_LEN); 393 memcpy(priv->kck, data->kck, NL80211_KCK_LEN); 394 priv->replay_ctr = 395 cpu_to_le64(be64_to_cpup((__be64 *)&data->replay_ctr)); 396 priv->have_rekey_data = true; 397 398 out: 399 mutex_unlock(&priv->mutex); 400 IWL_DEBUG_MAC80211(priv, "leave\n"); 401} 402 403#ifdef CONFIG_PM_SLEEP 404 405static int iwlagn_mac_suspend(struct ieee80211_hw *hw, 406 struct cfg80211_wowlan *wowlan) 407{ 408 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 409 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS]; 410 int ret; 411 412 if (WARN_ON(!wowlan)) 413 return -EINVAL; 414 415 IWL_DEBUG_MAC80211(priv, "enter\n"); 416 mutex_lock(&priv->mutex); 417 418 /* Don't attempt WoWLAN when not associated, tear down instead. */ 419 if (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION || 420 !iwl_is_associated_ctx(ctx)) { 421 ret = 1; 422 goto out; 423 } 424 425 ret = iwlagn_suspend(priv, wowlan); 426 if (ret) 427 goto error; 428 429 iwl_trans_wowlan_suspend(priv->trans); 430 431 goto out; 432 433 error: 434 priv->wowlan = false; 435 iwlagn_prepare_restart(priv); 436 ieee80211_restart_hw(priv->hw); 437 out: 438 mutex_unlock(&priv->mutex); 439 IWL_DEBUG_MAC80211(priv, "leave\n"); 440 441 return ret; 442} 443 444static int iwlagn_mac_resume(struct ieee80211_hw *hw) 445{ 446 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 447 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS]; 448 struct ieee80211_vif *vif; 449 unsigned long flags; 450 u32 base, status = 0xffffffff; 451 int ret = -EIO; 452 453 IWL_DEBUG_MAC80211(priv, "enter\n"); 454 mutex_lock(&priv->mutex); 455 456 iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_CLR, 457 CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE); 458 459 base = priv->device_pointers.error_event_table; 460 if (iwlagn_hw_valid_rtc_data_addr(base)) { 461 spin_lock_irqsave(&priv->trans->reg_lock, flags); 462 ret = iwl_grab_nic_access_silent(priv->trans); 463 if (likely(ret == 0)) { 464 iwl_write32(priv->trans, HBUS_TARG_MEM_RADDR, base); 465 status = iwl_read32(priv->trans, HBUS_TARG_MEM_RDAT); 466 iwl_release_nic_access(priv->trans); 467 } 468 spin_unlock_irqrestore(&priv->trans->reg_lock, flags); 469 470#ifdef CONFIG_IWLWIFI_DEBUGFS 471 if (ret == 0) { 472 const struct fw_img *img; 473 474 img = &(priv->fw->img[IWL_UCODE_WOWLAN]); 475 if (!priv->wowlan_sram) { 476 priv->wowlan_sram = 477 kzalloc(img->sec[IWL_UCODE_SECTION_DATA].len, 478 GFP_KERNEL); 479 } 480 481 if (priv->wowlan_sram) 482 _iwl_read_targ_mem_dwords( 483 priv->trans, 0x800000, 484 priv->wowlan_sram, 485 img->sec[IWL_UCODE_SECTION_DATA].len / 4); 486 } 487#endif 488 } 489 490 /* we'll clear ctx->vif during iwlagn_prepare_restart() */ 491 vif = ctx->vif; 492 493 priv->wowlan = false; 494 495 iwlagn_prepare_restart(priv); 496 497 memset((void *)&ctx->active, 0, sizeof(ctx->active)); 498 iwl_connection_init_rx_config(priv, ctx); 499 iwlagn_set_rxon_chain(priv, ctx); 500 501 mutex_unlock(&priv->mutex); 502 IWL_DEBUG_MAC80211(priv, "leave\n"); 503 504 ieee80211_resume_disconnect(vif); 505 506 return 1; 507} 508 509static void iwlagn_mac_set_wakeup(struct ieee80211_hw *hw, bool enabled) 510{ 511 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 512 513 device_set_wakeup_enable(priv->trans->dev, enabled); 514} 515#endif 516 517static void iwlagn_mac_tx(struct ieee80211_hw *hw, 518 struct ieee80211_tx_control *control, 519 struct sk_buff *skb) 520{ 521 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 522 523 IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len, 524 ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate); 525 526 if (iwlagn_tx_skb(priv, control->sta, skb)) 527 ieee80211_free_txskb(hw, skb); 528} 529 530static void iwlagn_mac_update_tkip_key(struct ieee80211_hw *hw, 531 struct ieee80211_vif *vif, 532 struct ieee80211_key_conf *keyconf, 533 struct ieee80211_sta *sta, 534 u32 iv32, u16 *phase1key) 535{ 536 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 537 538 iwl_update_tkip_key(priv, vif, keyconf, sta, iv32, phase1key); 539} 540 541static int iwlagn_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd, 542 struct ieee80211_vif *vif, 543 struct ieee80211_sta *sta, 544 struct ieee80211_key_conf *key) 545{ 546 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 547 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv; 548 struct iwl_rxon_context *ctx = vif_priv->ctx; 549 int ret; 550 bool is_default_wep_key = false; 551 552 IWL_DEBUG_MAC80211(priv, "enter\n"); 553 554 if (iwlwifi_mod_params.sw_crypto) { 555 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n"); 556 return -EOPNOTSUPP; 557 } 558 559 switch (key->cipher) { 560 case WLAN_CIPHER_SUITE_TKIP: 561 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC; 562 /* fall through */ 563 case WLAN_CIPHER_SUITE_CCMP: 564 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV; 565 break; 566 default: 567 break; 568 } 569 570 /* 571 * We could program these keys into the hardware as well, but we 572 * don't expect much multicast traffic in IBSS and having keys 573 * for more stations is probably more useful. 574 * 575 * Mark key TX-only and return 0. 576 */ 577 if (vif->type == NL80211_IFTYPE_ADHOC && 578 !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) { 579 key->hw_key_idx = WEP_INVALID_OFFSET; 580 return 0; 581 } 582 583 /* If they key was TX-only, accept deletion */ 584 if (cmd == DISABLE_KEY && key->hw_key_idx == WEP_INVALID_OFFSET) 585 return 0; 586 587 mutex_lock(&priv->mutex); 588 iwl_scan_cancel_timeout(priv, 100); 589 590 BUILD_BUG_ON(WEP_INVALID_OFFSET == IWLAGN_HW_KEY_DEFAULT); 591 592 /* 593 * If we are getting WEP group key and we didn't receive any key mapping 594 * so far, we are in legacy wep mode (group key only), otherwise we are 595 * in 1X mode. 596 * In legacy wep mode, we use another host command to the uCode. 597 */ 598 if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 || 599 key->cipher == WLAN_CIPHER_SUITE_WEP104) && !sta) { 600 if (cmd == SET_KEY) 601 is_default_wep_key = !ctx->key_mapping_keys; 602 else 603 is_default_wep_key = 604 key->hw_key_idx == IWLAGN_HW_KEY_DEFAULT; 605 } 606 607 608 switch (cmd) { 609 case SET_KEY: 610 if (is_default_wep_key) { 611 ret = iwl_set_default_wep_key(priv, vif_priv->ctx, key); 612 break; 613 } 614 ret = iwl_set_dynamic_key(priv, vif_priv->ctx, key, sta); 615 if (ret) { 616 /* 617 * can't add key for RX, but we don't need it 618 * in the device for TX so still return 0 619 */ 620 ret = 0; 621 key->hw_key_idx = WEP_INVALID_OFFSET; 622 } 623 624 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n"); 625 break; 626 case DISABLE_KEY: 627 if (is_default_wep_key) 628 ret = iwl_remove_default_wep_key(priv, ctx, key); 629 else 630 ret = iwl_remove_dynamic_key(priv, ctx, key, sta); 631 632 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n"); 633 break; 634 default: 635 ret = -EINVAL; 636 } 637 638 mutex_unlock(&priv->mutex); 639 IWL_DEBUG_MAC80211(priv, "leave\n"); 640 641 return ret; 642} 643 644static int iwlagn_mac_ampdu_action(struct ieee80211_hw *hw, 645 struct ieee80211_vif *vif, 646 enum ieee80211_ampdu_mlme_action action, 647 struct ieee80211_sta *sta, u16 tid, u16 *ssn, 648 u8 buf_size) 649{ 650 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 651 int ret = -EINVAL; 652 struct iwl_station_priv *sta_priv = (void *) sta->drv_priv; 653 654 IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n", 655 sta->addr, tid); 656 657 if (!(priv->nvm_data->sku_cap_11n_enable)) 658 return -EACCES; 659 660 IWL_DEBUG_MAC80211(priv, "enter\n"); 661 mutex_lock(&priv->mutex); 662 663 switch (action) { 664 case IEEE80211_AMPDU_RX_START: 665 if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG) 666 break; 667 IWL_DEBUG_HT(priv, "start Rx\n"); 668 ret = iwl_sta_rx_agg_start(priv, sta, tid, *ssn); 669 break; 670 case IEEE80211_AMPDU_RX_STOP: 671 IWL_DEBUG_HT(priv, "stop Rx\n"); 672 ret = iwl_sta_rx_agg_stop(priv, sta, tid); 673 break; 674 case IEEE80211_AMPDU_TX_START: 675 if (!priv->trans->ops->txq_enable) 676 break; 677 if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG) 678 break; 679 IWL_DEBUG_HT(priv, "start Tx\n"); 680 ret = iwlagn_tx_agg_start(priv, vif, sta, tid, ssn); 681 break; 682 case IEEE80211_AMPDU_TX_STOP_CONT: 683 case IEEE80211_AMPDU_TX_STOP_FLUSH: 684 case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT: 685 IWL_DEBUG_HT(priv, "stop Tx\n"); 686 ret = iwlagn_tx_agg_stop(priv, vif, sta, tid); 687 if ((ret == 0) && (priv->agg_tids_count > 0)) { 688 priv->agg_tids_count--; 689 IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n", 690 priv->agg_tids_count); 691 } 692 if (!priv->agg_tids_count && 693 priv->hw_params.use_rts_for_aggregation) { 694 /* 695 * switch off RTS/CTS if it was previously enabled 696 */ 697 sta_priv->lq_sta.lq.general_params.flags &= 698 ~LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK; 699 iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif), 700 &sta_priv->lq_sta.lq, CMD_ASYNC, false); 701 } 702 break; 703 case IEEE80211_AMPDU_TX_OPERATIONAL: 704 ret = iwlagn_tx_agg_oper(priv, vif, sta, tid, buf_size); 705 break; 706 } 707 mutex_unlock(&priv->mutex); 708 IWL_DEBUG_MAC80211(priv, "leave\n"); 709 return ret; 710} 711 712static int iwlagn_mac_sta_add(struct ieee80211_hw *hw, 713 struct ieee80211_vif *vif, 714 struct ieee80211_sta *sta) 715{ 716 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 717 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv; 718 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv; 719 bool is_ap = vif->type == NL80211_IFTYPE_STATION; 720 int ret; 721 u8 sta_id; 722 723 IWL_DEBUG_INFO(priv, "proceeding to add station %pM\n", 724 sta->addr); 725 sta_priv->sta_id = IWL_INVALID_STATION; 726 727 atomic_set(&sta_priv->pending_frames, 0); 728 if (vif->type == NL80211_IFTYPE_AP) 729 sta_priv->client = true; 730 731 ret = iwl_add_station_common(priv, vif_priv->ctx, sta->addr, 732 is_ap, sta, &sta_id); 733 if (ret) { 734 IWL_ERR(priv, "Unable to add station %pM (%d)\n", 735 sta->addr, ret); 736 /* Should we return success if return code is EEXIST ? */ 737 return ret; 738 } 739 740 sta_priv->sta_id = sta_id; 741 742 return 0; 743} 744 745static int iwlagn_mac_sta_remove(struct ieee80211_hw *hw, 746 struct ieee80211_vif *vif, 747 struct ieee80211_sta *sta) 748{ 749 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 750 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv; 751 int ret; 752 753 IWL_DEBUG_INFO(priv, "proceeding to remove station %pM\n", sta->addr); 754 755 if (vif->type == NL80211_IFTYPE_STATION) { 756 /* 757 * Station will be removed from device when the RXON 758 * is set to unassociated -- just deactivate it here 759 * to avoid re-programming it. 760 */ 761 ret = 0; 762 iwl_deactivate_station(priv, sta_priv->sta_id, sta->addr); 763 } else { 764 ret = iwl_remove_station(priv, sta_priv->sta_id, sta->addr); 765 if (ret) 766 IWL_DEBUG_QUIET_RFKILL(priv, 767 "Error removing station %pM\n", sta->addr); 768 } 769 return ret; 770} 771 772static int iwlagn_mac_sta_state(struct ieee80211_hw *hw, 773 struct ieee80211_vif *vif, 774 struct ieee80211_sta *sta, 775 enum ieee80211_sta_state old_state, 776 enum ieee80211_sta_state new_state) 777{ 778 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 779 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv; 780 enum { 781 NONE, ADD, REMOVE, HT_RATE_INIT, ADD_RATE_INIT, 782 } op = NONE; 783 int ret; 784 785 IWL_DEBUG_MAC80211(priv, "station %pM state change %d->%d\n", 786 sta->addr, old_state, new_state); 787 788 mutex_lock(&priv->mutex); 789 if (vif->type == NL80211_IFTYPE_STATION) { 790 if (old_state == IEEE80211_STA_NOTEXIST && 791 new_state == IEEE80211_STA_NONE) 792 op = ADD; 793 else if (old_state == IEEE80211_STA_NONE && 794 new_state == IEEE80211_STA_NOTEXIST) 795 op = REMOVE; 796 else if (old_state == IEEE80211_STA_AUTH && 797 new_state == IEEE80211_STA_ASSOC) 798 op = HT_RATE_INIT; 799 } else { 800 if (old_state == IEEE80211_STA_AUTH && 801 new_state == IEEE80211_STA_ASSOC) 802 op = ADD_RATE_INIT; 803 else if (old_state == IEEE80211_STA_ASSOC && 804 new_state == IEEE80211_STA_AUTH) 805 op = REMOVE; 806 } 807 808 switch (op) { 809 case ADD: 810 ret = iwlagn_mac_sta_add(hw, vif, sta); 811 if (ret) 812 break; 813 /* 814 * Clear the in-progress flag, the AP station entry was added 815 * but we'll initialize LQ only when we've associated (which 816 * would also clear the in-progress flag). This is necessary 817 * in case we never initialize LQ because association fails. 818 */ 819 spin_lock_bh(&priv->sta_lock); 820 priv->stations[iwl_sta_id(sta)].used &= 821 ~IWL_STA_UCODE_INPROGRESS; 822 spin_unlock_bh(&priv->sta_lock); 823 break; 824 case REMOVE: 825 ret = iwlagn_mac_sta_remove(hw, vif, sta); 826 break; 827 case ADD_RATE_INIT: 828 ret = iwlagn_mac_sta_add(hw, vif, sta); 829 if (ret) 830 break; 831 /* Initialize rate scaling */ 832 IWL_DEBUG_INFO(priv, 833 "Initializing rate scaling for station %pM\n", 834 sta->addr); 835 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta)); 836 ret = 0; 837 break; 838 case HT_RATE_INIT: 839 /* Initialize rate scaling */ 840 ret = iwl_sta_update_ht(priv, vif_priv->ctx, sta); 841 if (ret) 842 break; 843 IWL_DEBUG_INFO(priv, 844 "Initializing rate scaling for station %pM\n", 845 sta->addr); 846 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta)); 847 ret = 0; 848 break; 849 default: 850 ret = 0; 851 break; 852 } 853 854 /* 855 * mac80211 might WARN if we fail, but due the way we 856 * (badly) handle hard rfkill, we might fail here 857 */ 858 if (iwl_is_rfkill(priv)) 859 ret = 0; 860 861 mutex_unlock(&priv->mutex); 862 IWL_DEBUG_MAC80211(priv, "leave\n"); 863 864 return ret; 865} 866 867static void iwlagn_mac_channel_switch(struct ieee80211_hw *hw, 868 struct ieee80211_channel_switch *ch_switch) 869{ 870 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 871 struct ieee80211_conf *conf = &hw->conf; 872 struct ieee80211_channel *channel = ch_switch->channel; 873 struct iwl_ht_config *ht_conf = &priv->current_ht_config; 874 /* 875 * MULTI-FIXME 876 * When we add support for multiple interfaces, we need to 877 * revisit this. The channel switch command in the device 878 * only affects the BSS context, but what does that really 879 * mean? And what if we get a CSA on the second interface? 880 * This needs a lot of work. 881 */ 882 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS]; 883 u16 ch; 884 885 IWL_DEBUG_MAC80211(priv, "enter\n"); 886 887 mutex_lock(&priv->mutex); 888 889 if (iwl_is_rfkill(priv)) 890 goto out; 891 892 if (test_bit(STATUS_EXIT_PENDING, &priv->status) || 893 test_bit(STATUS_SCANNING, &priv->status) || 894 test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status)) 895 goto out; 896 897 if (!iwl_is_associated_ctx(ctx)) 898 goto out; 899 900 if (!priv->lib->set_channel_switch) 901 goto out; 902 903 ch = channel->hw_value; 904 if (le16_to_cpu(ctx->active.channel) == ch) 905 goto out; 906 907 priv->current_ht_config.smps = conf->smps_mode; 908 909 /* Configure HT40 channels */ 910 ctx->ht.enabled = conf_is_ht(conf); 911 if (ctx->ht.enabled) 912 iwlagn_config_ht40(conf, ctx); 913 else 914 ctx->ht.is_40mhz = false; 915 916 if ((le16_to_cpu(ctx->staging.channel) != ch)) 917 ctx->staging.flags = 0; 918 919 iwl_set_rxon_channel(priv, channel, ctx); 920 iwl_set_rxon_ht(priv, ht_conf); 921 iwl_set_flags_for_band(priv, ctx, channel->band, ctx->vif); 922 923 /* 924 * at this point, staging_rxon has the 925 * configuration for channel switch 926 */ 927 set_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status); 928 priv->switch_channel = cpu_to_le16(ch); 929 if (priv->lib->set_channel_switch(priv, ch_switch)) { 930 clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status); 931 priv->switch_channel = 0; 932 ieee80211_chswitch_done(ctx->vif, false); 933 } 934 935out: 936 mutex_unlock(&priv->mutex); 937 IWL_DEBUG_MAC80211(priv, "leave\n"); 938} 939 940void iwl_chswitch_done(struct iwl_priv *priv, bool is_success) 941{ 942 /* 943 * MULTI-FIXME 944 * See iwlagn_mac_channel_switch. 945 */ 946 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS]; 947 948 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) 949 return; 950 951 if (test_and_clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status)) 952 ieee80211_chswitch_done(ctx->vif, is_success); 953} 954 955static void iwlagn_configure_filter(struct ieee80211_hw *hw, 956 unsigned int changed_flags, 957 unsigned int *total_flags, 958 u64 multicast) 959{ 960 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 961 __le32 filter_or = 0, filter_nand = 0; 962 struct iwl_rxon_context *ctx; 963 964#define CHK(test, flag) do { \ 965 if (*total_flags & (test)) \ 966 filter_or |= (flag); \ 967 else \ 968 filter_nand |= (flag); \ 969 } while (0) 970 971 IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n", 972 changed_flags, *total_flags); 973 974 CHK(FIF_OTHER_BSS | FIF_PROMISC_IN_BSS, RXON_FILTER_PROMISC_MSK); 975 /* Setting _just_ RXON_FILTER_CTL2HOST_MSK causes FH errors */ 976 CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_PROMISC_MSK); 977 CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK); 978 979#undef CHK 980 981 mutex_lock(&priv->mutex); 982 983 for_each_context(priv, ctx) { 984 ctx->staging.filter_flags &= ~filter_nand; 985 ctx->staging.filter_flags |= filter_or; 986 987 /* 988 * Not committing directly because hardware can perform a scan, 989 * but we'll eventually commit the filter flags change anyway. 990 */ 991 } 992 993 mutex_unlock(&priv->mutex); 994 995 /* 996 * Receiving all multicast frames is always enabled by the 997 * default flags setup in iwl_connection_init_rx_config() 998 * since we currently do not support programming multicast 999 * filters into the device. 1000 */ 1001 *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS | 1002 FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL; 1003} 1004 1005static void iwlagn_mac_flush(struct ieee80211_hw *hw, bool drop) 1006{ 1007 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1008 1009 mutex_lock(&priv->mutex); 1010 IWL_DEBUG_MAC80211(priv, "enter\n"); 1011 1012 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) { 1013 IWL_DEBUG_TX(priv, "Aborting flush due to device shutdown\n"); 1014 goto done; 1015 } 1016 if (iwl_is_rfkill(priv)) { 1017 IWL_DEBUG_TX(priv, "Aborting flush due to RF Kill\n"); 1018 goto done; 1019 } 1020 1021 /* 1022 * mac80211 will not push any more frames for transmit 1023 * until the flush is completed 1024 */ 1025 if (drop) { 1026 IWL_DEBUG_MAC80211(priv, "send flush command\n"); 1027 if (iwlagn_txfifo_flush(priv)) { 1028 IWL_ERR(priv, "flush request fail\n"); 1029 goto done; 1030 } 1031 } 1032 IWL_DEBUG_MAC80211(priv, "wait transmit/flush all frames\n"); 1033 iwl_trans_wait_tx_queue_empty(priv->trans); 1034done: 1035 mutex_unlock(&priv->mutex); 1036 IWL_DEBUG_MAC80211(priv, "leave\n"); 1037} 1038 1039static int iwlagn_mac_remain_on_channel(struct ieee80211_hw *hw, 1040 struct ieee80211_vif *vif, 1041 struct ieee80211_channel *channel, 1042 int duration) 1043{ 1044 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1045 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_PAN]; 1046 int err = 0; 1047 1048 if (!(priv->valid_contexts & BIT(IWL_RXON_CTX_PAN))) 1049 return -EOPNOTSUPP; 1050 1051 if (!(ctx->interface_modes & BIT(NL80211_IFTYPE_P2P_CLIENT))) 1052 return -EOPNOTSUPP; 1053 1054 IWL_DEBUG_MAC80211(priv, "enter\n"); 1055 mutex_lock(&priv->mutex); 1056 1057 if (test_bit(STATUS_SCAN_HW, &priv->status)) { 1058 /* mac80211 should not scan while ROC or ROC while scanning */ 1059 if (WARN_ON_ONCE(priv->scan_type != IWL_SCAN_RADIO_RESET)) { 1060 err = -EBUSY; 1061 goto out; 1062 } 1063 1064 iwl_scan_cancel_timeout(priv, 100); 1065 1066 if (test_bit(STATUS_SCAN_HW, &priv->status)) { 1067 err = -EBUSY; 1068 goto out; 1069 } 1070 } 1071 1072 priv->hw_roc_channel = channel; 1073 /* convert from ms to TU */ 1074 priv->hw_roc_duration = DIV_ROUND_UP(1000 * duration, 1024); 1075 priv->hw_roc_start_notified = false; 1076 cancel_delayed_work(&priv->hw_roc_disable_work); 1077 1078 if (!ctx->is_active) { 1079 static const struct iwl_qos_info default_qos_data = { 1080 .def_qos_parm = { 1081 .ac[0] = { 1082 .cw_min = cpu_to_le16(3), 1083 .cw_max = cpu_to_le16(7), 1084 .aifsn = 2, 1085 .edca_txop = cpu_to_le16(1504), 1086 }, 1087 .ac[1] = { 1088 .cw_min = cpu_to_le16(7), 1089 .cw_max = cpu_to_le16(15), 1090 .aifsn = 2, 1091 .edca_txop = cpu_to_le16(3008), 1092 }, 1093 .ac[2] = { 1094 .cw_min = cpu_to_le16(15), 1095 .cw_max = cpu_to_le16(1023), 1096 .aifsn = 3, 1097 }, 1098 .ac[3] = { 1099 .cw_min = cpu_to_le16(15), 1100 .cw_max = cpu_to_le16(1023), 1101 .aifsn = 7, 1102 }, 1103 }, 1104 }; 1105 1106 ctx->is_active = true; 1107 ctx->qos_data = default_qos_data; 1108 ctx->staging.dev_type = RXON_DEV_TYPE_P2P; 1109 memcpy(ctx->staging.node_addr, 1110 priv->contexts[IWL_RXON_CTX_BSS].staging.node_addr, 1111 ETH_ALEN); 1112 memcpy(ctx->staging.bssid_addr, 1113 priv->contexts[IWL_RXON_CTX_BSS].staging.node_addr, 1114 ETH_ALEN); 1115 err = iwlagn_commit_rxon(priv, ctx); 1116 if (err) 1117 goto out; 1118 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK | 1119 RXON_FILTER_PROMISC_MSK | 1120 RXON_FILTER_CTL2HOST_MSK; 1121 1122 err = iwlagn_commit_rxon(priv, ctx); 1123 if (err) { 1124 iwlagn_disable_roc(priv); 1125 goto out; 1126 } 1127 priv->hw_roc_setup = true; 1128 } 1129 1130 err = iwl_scan_initiate(priv, ctx->vif, IWL_SCAN_ROC, channel->band); 1131 if (err) 1132 iwlagn_disable_roc(priv); 1133 1134 out: 1135 mutex_unlock(&priv->mutex); 1136 IWL_DEBUG_MAC80211(priv, "leave\n"); 1137 1138 return err; 1139} 1140 1141static int iwlagn_mac_cancel_remain_on_channel(struct ieee80211_hw *hw) 1142{ 1143 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1144 1145 if (!(priv->valid_contexts & BIT(IWL_RXON_CTX_PAN))) 1146 return -EOPNOTSUPP; 1147 1148 IWL_DEBUG_MAC80211(priv, "enter\n"); 1149 mutex_lock(&priv->mutex); 1150 iwl_scan_cancel_timeout(priv, priv->hw_roc_duration); 1151 iwlagn_disable_roc(priv); 1152 mutex_unlock(&priv->mutex); 1153 IWL_DEBUG_MAC80211(priv, "leave\n"); 1154 1155 return 0; 1156} 1157 1158static void iwlagn_mac_rssi_callback(struct ieee80211_hw *hw, 1159 struct ieee80211_vif *vif, 1160 enum ieee80211_rssi_event rssi_event) 1161{ 1162 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1163 1164 IWL_DEBUG_MAC80211(priv, "enter\n"); 1165 mutex_lock(&priv->mutex); 1166 1167 if (priv->cfg->bt_params && 1168 priv->cfg->bt_params->advanced_bt_coexist) { 1169 if (rssi_event == RSSI_EVENT_LOW) 1170 priv->bt_enable_pspoll = true; 1171 else if (rssi_event == RSSI_EVENT_HIGH) 1172 priv->bt_enable_pspoll = false; 1173 1174 iwlagn_send_advance_bt_config(priv); 1175 } else { 1176 IWL_DEBUG_MAC80211(priv, "Advanced BT coex disabled," 1177 "ignoring RSSI callback\n"); 1178 } 1179 1180 mutex_unlock(&priv->mutex); 1181 IWL_DEBUG_MAC80211(priv, "leave\n"); 1182} 1183 1184static int iwlagn_mac_set_tim(struct ieee80211_hw *hw, 1185 struct ieee80211_sta *sta, bool set) 1186{ 1187 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1188 1189 queue_work(priv->workqueue, &priv->beacon_update); 1190 1191 return 0; 1192} 1193 1194static int iwlagn_mac_conf_tx(struct ieee80211_hw *hw, 1195 struct ieee80211_vif *vif, u16 queue, 1196 const struct ieee80211_tx_queue_params *params) 1197{ 1198 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1199 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv; 1200 struct iwl_rxon_context *ctx = vif_priv->ctx; 1201 int q; 1202 1203 if (WARN_ON(!ctx)) 1204 return -EINVAL; 1205 1206 IWL_DEBUG_MAC80211(priv, "enter\n"); 1207 1208 if (!iwl_is_ready_rf(priv)) { 1209 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n"); 1210 return -EIO; 1211 } 1212 1213 if (queue >= AC_NUM) { 1214 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue); 1215 return 0; 1216 } 1217 1218 q = AC_NUM - 1 - queue; 1219 1220 mutex_lock(&priv->mutex); 1221 1222 ctx->qos_data.def_qos_parm.ac[q].cw_min = 1223 cpu_to_le16(params->cw_min); 1224 ctx->qos_data.def_qos_parm.ac[q].cw_max = 1225 cpu_to_le16(params->cw_max); 1226 ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs; 1227 ctx->qos_data.def_qos_parm.ac[q].edca_txop = 1228 cpu_to_le16((params->txop * 32)); 1229 1230 ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0; 1231 1232 mutex_unlock(&priv->mutex); 1233 1234 IWL_DEBUG_MAC80211(priv, "leave\n"); 1235 return 0; 1236} 1237 1238static int iwlagn_mac_tx_last_beacon(struct ieee80211_hw *hw) 1239{ 1240 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1241 1242 return priv->ibss_manager == IWL_IBSS_MANAGER; 1243} 1244 1245static int iwl_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx) 1246{ 1247 iwl_connection_init_rx_config(priv, ctx); 1248 1249 iwlagn_set_rxon_chain(priv, ctx); 1250 1251 return iwlagn_commit_rxon(priv, ctx); 1252} 1253 1254static int iwl_setup_interface(struct iwl_priv *priv, 1255 struct iwl_rxon_context *ctx) 1256{ 1257 struct ieee80211_vif *vif = ctx->vif; 1258 int err, ac; 1259 1260 lockdep_assert_held(&priv->mutex); 1261 1262 /* 1263 * This variable will be correct only when there's just 1264 * a single context, but all code using it is for hardware 1265 * that supports only one context. 1266 */ 1267 priv->iw_mode = vif->type; 1268 1269 ctx->is_active = true; 1270 1271 err = iwl_set_mode(priv, ctx); 1272 if (err) { 1273 if (!ctx->always_active) 1274 ctx->is_active = false; 1275 return err; 1276 } 1277 1278 if (priv->cfg->bt_params && priv->cfg->bt_params->advanced_bt_coexist && 1279 vif->type == NL80211_IFTYPE_ADHOC) { 1280 /* 1281 * pretend to have high BT traffic as long as we 1282 * are operating in IBSS mode, as this will cause 1283 * the rate scaling etc. to behave as intended. 1284 */ 1285 priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH; 1286 } 1287 1288 /* set up queue mappings */ 1289 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 1290 vif->hw_queue[ac] = ctx->ac_to_queue[ac]; 1291 1292 if (vif->type == NL80211_IFTYPE_AP) 1293 vif->cab_queue = ctx->mcast_queue; 1294 else 1295 vif->cab_queue = IEEE80211_INVAL_HW_QUEUE; 1296 1297 return 0; 1298} 1299 1300static int iwlagn_mac_add_interface(struct ieee80211_hw *hw, 1301 struct ieee80211_vif *vif) 1302{ 1303 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1304 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv; 1305 struct iwl_rxon_context *tmp, *ctx = NULL; 1306 int err; 1307 enum nl80211_iftype viftype = ieee80211_vif_type_p2p(vif); 1308 bool reset = false; 1309 1310 IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n", 1311 viftype, vif->addr); 1312 1313 cancel_delayed_work_sync(&priv->hw_roc_disable_work); 1314 1315 mutex_lock(&priv->mutex); 1316 1317 iwlagn_disable_roc(priv); 1318 1319 if (!iwl_is_ready_rf(priv)) { 1320 IWL_WARN(priv, "Try to add interface when device not ready\n"); 1321 err = -EINVAL; 1322 goto out; 1323 } 1324 1325 for_each_context(priv, tmp) { 1326 u32 possible_modes = 1327 tmp->interface_modes | tmp->exclusive_interface_modes; 1328 1329 if (tmp->vif) { 1330 /* On reset we need to add the same interface again */ 1331 if (tmp->vif == vif) { 1332 reset = true; 1333 ctx = tmp; 1334 break; 1335 } 1336 1337 /* check if this busy context is exclusive */ 1338 if (tmp->exclusive_interface_modes & 1339 BIT(tmp->vif->type)) { 1340 err = -EINVAL; 1341 goto out; 1342 } 1343 continue; 1344 } 1345 1346 if (!(possible_modes & BIT(viftype))) 1347 continue; 1348 1349 /* have maybe usable context w/o interface */ 1350 ctx = tmp; 1351 break; 1352 } 1353 1354 if (!ctx) { 1355 err = -EOPNOTSUPP; 1356 goto out; 1357 } 1358 1359 vif_priv->ctx = ctx; 1360 ctx->vif = vif; 1361 1362 /* 1363 * In SNIFFER device type, the firmware reports the FCS to 1364 * the host, rather than snipping it off. Unfortunately, 1365 * mac80211 doesn't (yet) provide a per-packet flag for 1366 * this, so that we have to set the hardware flag based 1367 * on the interfaces added. As the monitor interface can 1368 * only be present by itself, and will be removed before 1369 * other interfaces are added, this is safe. 1370 */ 1371 if (vif->type == NL80211_IFTYPE_MONITOR) 1372 priv->hw->flags |= IEEE80211_HW_RX_INCLUDES_FCS; 1373 else 1374 priv->hw->flags &= ~IEEE80211_HW_RX_INCLUDES_FCS; 1375 1376 err = iwl_setup_interface(priv, ctx); 1377 if (!err || reset) 1378 goto out; 1379 1380 ctx->vif = NULL; 1381 priv->iw_mode = NL80211_IFTYPE_STATION; 1382 out: 1383 mutex_unlock(&priv->mutex); 1384 1385 IWL_DEBUG_MAC80211(priv, "leave\n"); 1386 return err; 1387} 1388 1389static void iwl_teardown_interface(struct iwl_priv *priv, 1390 struct ieee80211_vif *vif, 1391 bool mode_change) 1392{ 1393 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif); 1394 1395 lockdep_assert_held(&priv->mutex); 1396 1397 if (priv->scan_vif == vif) { 1398 iwl_scan_cancel_timeout(priv, 200); 1399 iwl_force_scan_end(priv); 1400 } 1401 1402 if (!mode_change) { 1403 iwl_set_mode(priv, ctx); 1404 if (!ctx->always_active) 1405 ctx->is_active = false; 1406 } 1407 1408 /* 1409 * When removing the IBSS interface, overwrite the 1410 * BT traffic load with the stored one from the last 1411 * notification, if any. If this is a device that 1412 * doesn't implement this, this has no effect since 1413 * both values are the same and zero. 1414 */ 1415 if (vif->type == NL80211_IFTYPE_ADHOC) 1416 priv->bt_traffic_load = priv->last_bt_traffic_load; 1417} 1418 1419static void iwlagn_mac_remove_interface(struct ieee80211_hw *hw, 1420 struct ieee80211_vif *vif) 1421{ 1422 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1423 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif); 1424 1425 IWL_DEBUG_MAC80211(priv, "enter\n"); 1426 1427 mutex_lock(&priv->mutex); 1428 1429 if (WARN_ON(ctx->vif != vif)) { 1430 struct iwl_rxon_context *tmp; 1431 IWL_ERR(priv, "ctx->vif = %p, vif = %p\n", ctx->vif, vif); 1432 for_each_context(priv, tmp) 1433 IWL_ERR(priv, "\tID = %d:\tctx = %p\tctx->vif = %p\n", 1434 tmp->ctxid, tmp, tmp->vif); 1435 } 1436 ctx->vif = NULL; 1437 1438 iwl_teardown_interface(priv, vif, false); 1439 1440 mutex_unlock(&priv->mutex); 1441 1442 IWL_DEBUG_MAC80211(priv, "leave\n"); 1443 1444} 1445 1446static int iwlagn_mac_change_interface(struct ieee80211_hw *hw, 1447 struct ieee80211_vif *vif, 1448 enum nl80211_iftype newtype, bool newp2p) 1449{ 1450 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1451 struct iwl_rxon_context *ctx, *tmp; 1452 enum nl80211_iftype newviftype = newtype; 1453 u32 interface_modes; 1454 int err; 1455 1456 IWL_DEBUG_MAC80211(priv, "enter\n"); 1457 1458 newtype = ieee80211_iftype_p2p(newtype, newp2p); 1459 1460 mutex_lock(&priv->mutex); 1461 1462 ctx = iwl_rxon_ctx_from_vif(vif); 1463 1464 /* 1465 * To simplify this code, only support changes on the 1466 * BSS context. The PAN context is usually reassigned 1467 * by creating/removing P2P interfaces anyway. 1468 */ 1469 if (ctx->ctxid != IWL_RXON_CTX_BSS) { 1470 err = -EBUSY; 1471 goto out; 1472 } 1473 1474 if (!ctx->vif || !iwl_is_ready_rf(priv)) { 1475 /* 1476 * Huh? But wait ... this can maybe happen when 1477 * we're in the middle of a firmware restart! 1478 */ 1479 err = -EBUSY; 1480 goto out; 1481 } 1482 1483 /* Check if the switch is supported in the same context */ 1484 interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes; 1485 if (!(interface_modes & BIT(newtype))) { 1486 err = -EBUSY; 1487 goto out; 1488 } 1489 1490 if (ctx->exclusive_interface_modes & BIT(newtype)) { 1491 for_each_context(priv, tmp) { 1492 if (ctx == tmp) 1493 continue; 1494 1495 if (!tmp->is_active) 1496 continue; 1497 1498 /* 1499 * The current mode switch would be exclusive, but 1500 * another context is active ... refuse the switch. 1501 */ 1502 err = -EBUSY; 1503 goto out; 1504 } 1505 } 1506 1507 /* success */ 1508 iwl_teardown_interface(priv, vif, true); 1509 vif->type = newviftype; 1510 vif->p2p = newp2p; 1511 err = iwl_setup_interface(priv, ctx); 1512 WARN_ON(err); 1513 /* 1514 * We've switched internally, but submitting to the 1515 * device may have failed for some reason. Mask this 1516 * error, because otherwise mac80211 will not switch 1517 * (and set the interface type back) and we'll be 1518 * out of sync with it. 1519 */ 1520 err = 0; 1521 1522 out: 1523 mutex_unlock(&priv->mutex); 1524 IWL_DEBUG_MAC80211(priv, "leave\n"); 1525 1526 return err; 1527} 1528 1529static int iwlagn_mac_hw_scan(struct ieee80211_hw *hw, 1530 struct ieee80211_vif *vif, 1531 struct cfg80211_scan_request *req) 1532{ 1533 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1534 int ret; 1535 1536 IWL_DEBUG_MAC80211(priv, "enter\n"); 1537 1538 if (req->n_channels == 0) 1539 return -EINVAL; 1540 1541 mutex_lock(&priv->mutex); 1542 1543 /* 1544 * If an internal scan is in progress, just set 1545 * up the scan_request as per above. 1546 */ 1547 if (priv->scan_type != IWL_SCAN_NORMAL) { 1548 IWL_DEBUG_SCAN(priv, 1549 "SCAN request during internal scan - defer\n"); 1550 priv->scan_request = req; 1551 priv->scan_vif = vif; 1552 ret = 0; 1553 } else { 1554 priv->scan_request = req; 1555 priv->scan_vif = vif; 1556 /* 1557 * mac80211 will only ask for one band at a time 1558 * so using channels[0] here is ok 1559 */ 1560 ret = iwl_scan_initiate(priv, vif, IWL_SCAN_NORMAL, 1561 req->channels[0]->band); 1562 if (ret) { 1563 priv->scan_request = NULL; 1564 priv->scan_vif = NULL; 1565 } 1566 } 1567 1568 IWL_DEBUG_MAC80211(priv, "leave\n"); 1569 1570 mutex_unlock(&priv->mutex); 1571 1572 return ret; 1573} 1574 1575static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id) 1576{ 1577 struct iwl_addsta_cmd cmd = { 1578 .mode = STA_CONTROL_MODIFY_MSK, 1579 .station_flags_msk = STA_FLG_PWR_SAVE_MSK, 1580 .sta.sta_id = sta_id, 1581 }; 1582 1583 iwl_send_add_sta(priv, &cmd, CMD_ASYNC); 1584} 1585 1586static void iwlagn_mac_sta_notify(struct ieee80211_hw *hw, 1587 struct ieee80211_vif *vif, 1588 enum sta_notify_cmd cmd, 1589 struct ieee80211_sta *sta) 1590{ 1591 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1592 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv; 1593 int sta_id; 1594 1595 IWL_DEBUG_MAC80211(priv, "enter\n"); 1596 1597 switch (cmd) { 1598 case STA_NOTIFY_SLEEP: 1599 WARN_ON(!sta_priv->client); 1600 sta_priv->asleep = true; 1601 if (atomic_read(&sta_priv->pending_frames) > 0) 1602 ieee80211_sta_block_awake(hw, sta, true); 1603 break; 1604 case STA_NOTIFY_AWAKE: 1605 WARN_ON(!sta_priv->client); 1606 if (!sta_priv->asleep) 1607 break; 1608 sta_priv->asleep = false; 1609 sta_id = iwl_sta_id(sta); 1610 if (sta_id != IWL_INVALID_STATION) 1611 iwl_sta_modify_ps_wake(priv, sta_id); 1612 break; 1613 default: 1614 break; 1615 } 1616 IWL_DEBUG_MAC80211(priv, "leave\n"); 1617} 1618 1619struct ieee80211_ops iwlagn_hw_ops = { 1620 .tx = iwlagn_mac_tx, 1621 .start = iwlagn_mac_start, 1622 .stop = iwlagn_mac_stop, 1623#ifdef CONFIG_PM_SLEEP 1624 .suspend = iwlagn_mac_suspend, 1625 .resume = iwlagn_mac_resume, 1626 .set_wakeup = iwlagn_mac_set_wakeup, 1627#endif 1628 .add_interface = iwlagn_mac_add_interface, 1629 .remove_interface = iwlagn_mac_remove_interface, 1630 .change_interface = iwlagn_mac_change_interface, 1631 .config = iwlagn_mac_config, 1632 .configure_filter = iwlagn_configure_filter, 1633 .set_key = iwlagn_mac_set_key, 1634 .update_tkip_key = iwlagn_mac_update_tkip_key, 1635 .set_rekey_data = iwlagn_mac_set_rekey_data, 1636 .conf_tx = iwlagn_mac_conf_tx, 1637 .bss_info_changed = iwlagn_bss_info_changed, 1638 .ampdu_action = iwlagn_mac_ampdu_action, 1639 .hw_scan = iwlagn_mac_hw_scan, 1640 .sta_notify = iwlagn_mac_sta_notify, 1641 .sta_state = iwlagn_mac_sta_state, 1642 .channel_switch = iwlagn_mac_channel_switch, 1643 .flush = iwlagn_mac_flush, 1644 .tx_last_beacon = iwlagn_mac_tx_last_beacon, 1645 .remain_on_channel = iwlagn_mac_remain_on_channel, 1646 .cancel_remain_on_channel = iwlagn_mac_cancel_remain_on_channel, 1647 .rssi_callback = iwlagn_mac_rssi_callback, 1648 CFG80211_TESTMODE_CMD(iwlagn_mac_testmode_cmd) 1649 CFG80211_TESTMODE_DUMP(iwlagn_mac_testmode_dump) 1650 .set_tim = iwlagn_mac_set_tim, 1651}; 1652 1653/* This function both allocates and initializes hw and priv. */ 1654struct ieee80211_hw *iwl_alloc_all(void) 1655{ 1656 struct iwl_priv *priv; 1657 struct iwl_op_mode *op_mode; 1658 /* mac80211 allocates memory for this device instance, including 1659 * space for this driver's private structure */ 1660 struct ieee80211_hw *hw; 1661 1662 hw = ieee80211_alloc_hw(sizeof(struct iwl_priv) + 1663 sizeof(struct iwl_op_mode), &iwlagn_hw_ops); 1664 if (!hw) 1665 goto out; 1666 1667 op_mode = hw->priv; 1668 priv = IWL_OP_MODE_GET_DVM(op_mode); 1669 priv->hw = hw; 1670 1671out: 1672 return hw; 1673} 1674