1/****************************************************************************** 2 * 3 * Copyright(c) 2003 - 2014 Intel Corporation. All rights reserved. 4 * 5 * Portions of this file are derived from the ipw3945 project, as well 6 * as portions of the ieee80211 subsystem header files. 7 * 8 * This program is free software; you can redistribute it and/or modify it 9 * under the terms of version 2 of the GNU General Public License as 10 * published by the Free Software Foundation. 11 * 12 * This program is distributed in the hope that it will be useful, but WITHOUT 13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 15 * more details. 16 * 17 * 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/slab.h> 32#include <linux/dma-mapping.h> 33#include <linux/delay.h> 34#include <linux/sched.h> 35#include <linux/skbuff.h> 36#include <linux/netdevice.h> 37#include <linux/etherdevice.h> 38#include <linux/if_arp.h> 39 40#include <net/ieee80211_radiotap.h> 41#include <net/mac80211.h> 42 43#include <asm/div64.h> 44 45#include "iwl-io.h" 46#include "iwl-trans.h" 47#include "iwl-op-mode.h" 48#include "iwl-modparams.h" 49 50#include "dev.h" 51#include "calib.h" 52#include "agn.h" 53 54/***************************************************************************** 55 * 56 * mac80211 entry point functions 57 * 58 *****************************************************************************/ 59 60static const struct ieee80211_iface_limit iwlagn_sta_ap_limits[] = { 61 { 62 .max = 1, 63 .types = BIT(NL80211_IFTYPE_STATION), 64 }, 65 { 66 .max = 1, 67 .types = BIT(NL80211_IFTYPE_AP), 68 }, 69}; 70 71static const struct ieee80211_iface_limit iwlagn_2sta_limits[] = { 72 { 73 .max = 2, 74 .types = BIT(NL80211_IFTYPE_STATION), 75 }, 76}; 77 78static const struct ieee80211_iface_combination 79iwlagn_iface_combinations_dualmode[] = { 80 { .num_different_channels = 1, 81 .max_interfaces = 2, 82 .beacon_int_infra_match = true, 83 .limits = iwlagn_sta_ap_limits, 84 .n_limits = ARRAY_SIZE(iwlagn_sta_ap_limits), 85 }, 86 { .num_different_channels = 1, 87 .max_interfaces = 2, 88 .limits = iwlagn_2sta_limits, 89 .n_limits = ARRAY_SIZE(iwlagn_2sta_limits), 90 }, 91}; 92 93/* 94 * Not a mac80211 entry point function, but it fits in with all the 95 * other mac80211 functions grouped here. 96 */ 97int iwlagn_mac_setup_register(struct iwl_priv *priv, 98 const struct iwl_ucode_capabilities *capa) 99{ 100 int ret; 101 struct ieee80211_hw *hw = priv->hw; 102 struct iwl_rxon_context *ctx; 103 104 hw->rate_control_algorithm = "iwl-agn-rs"; 105 106 /* Tell mac80211 our characteristics */ 107 hw->flags = IEEE80211_HW_SIGNAL_DBM | 108 IEEE80211_HW_AMPDU_AGGREGATION | 109 IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC | 110 IEEE80211_HW_SPECTRUM_MGMT | 111 IEEE80211_HW_REPORTS_TX_ACK_STATUS | 112 IEEE80211_HW_QUEUE_CONTROL | 113 IEEE80211_HW_SUPPORTS_PS | 114 IEEE80211_HW_SUPPORTS_DYNAMIC_PS | 115 IEEE80211_HW_WANT_MONITOR_VIF; 116 117 hw->offchannel_tx_hw_queue = IWL_AUX_QUEUE; 118 hw->radiotap_mcs_details |= IEEE80211_RADIOTAP_MCS_HAVE_FMT; 119 120 /* 121 * Including the following line will crash some AP's. This 122 * workaround removes the stimulus which causes the crash until 123 * the AP software can be fixed. 124 hw->max_tx_aggregation_subframes = LINK_QUAL_AGG_FRAME_LIMIT_DEF; 125 */ 126 127 if (priv->nvm_data->sku_cap_11n_enable) 128 hw->wiphy->features |= NL80211_FEATURE_DYNAMIC_SMPS | 129 NL80211_FEATURE_STATIC_SMPS; 130 131 /* 132 * Enable 11w if advertised by firmware and software crypto 133 * is not enabled (as the firmware will interpret some mgmt 134 * packets, so enabling it with software crypto isn't safe) 135 */ 136 if (priv->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_MFP && 137 !iwlwifi_mod_params.sw_crypto) 138 hw->flags |= IEEE80211_HW_MFP_CAPABLE; 139 140 hw->sta_data_size = sizeof(struct iwl_station_priv); 141 hw->vif_data_size = sizeof(struct iwl_vif_priv); 142 143 for_each_context(priv, ctx) { 144 hw->wiphy->interface_modes |= ctx->interface_modes; 145 hw->wiphy->interface_modes |= ctx->exclusive_interface_modes; 146 } 147 148 BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2); 149 150 if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) { 151 hw->wiphy->iface_combinations = 152 iwlagn_iface_combinations_dualmode; 153 hw->wiphy->n_iface_combinations = 154 ARRAY_SIZE(iwlagn_iface_combinations_dualmode); 155 } 156 157 hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN; 158 hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG | 159 REGULATORY_DISABLE_BEACON_HINTS; 160 161#ifdef CONFIG_PM_SLEEP 162 if (priv->fw->img[IWL_UCODE_WOWLAN].sec[0].len && 163 priv->trans->ops->d3_suspend && 164 priv->trans->ops->d3_resume && 165 device_can_wakeup(priv->trans->dev)) { 166 priv->wowlan_support.flags = WIPHY_WOWLAN_MAGIC_PKT | 167 WIPHY_WOWLAN_DISCONNECT | 168 WIPHY_WOWLAN_EAP_IDENTITY_REQ | 169 WIPHY_WOWLAN_RFKILL_RELEASE; 170 if (!iwlwifi_mod_params.sw_crypto) 171 priv->wowlan_support.flags |= 172 WIPHY_WOWLAN_SUPPORTS_GTK_REKEY | 173 WIPHY_WOWLAN_GTK_REKEY_FAILURE; 174 175 priv->wowlan_support.n_patterns = IWLAGN_WOWLAN_MAX_PATTERNS; 176 priv->wowlan_support.pattern_min_len = 177 IWLAGN_WOWLAN_MIN_PATTERN_LEN; 178 priv->wowlan_support.pattern_max_len = 179 IWLAGN_WOWLAN_MAX_PATTERN_LEN; 180 hw->wiphy->wowlan = &priv->wowlan_support; 181 } 182#endif 183 184 if (iwlwifi_mod_params.power_save) 185 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT; 186 else 187 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT; 188 189 hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX; 190 /* we create the 802.11 header and a max-length SSID element */ 191 hw->wiphy->max_scan_ie_len = capa->max_probe_length - 24 - 34; 192 193 /* 194 * We don't use all queues: 4 and 9 are unused and any 195 * aggregation queue gets mapped down to the AC queue. 196 */ 197 hw->queues = IWLAGN_FIRST_AMPDU_QUEUE; 198 199 hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL; 200 201 if (priv->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels) 202 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = 203 &priv->nvm_data->bands[IEEE80211_BAND_2GHZ]; 204 if (priv->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels) 205 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] = 206 &priv->nvm_data->bands[IEEE80211_BAND_5GHZ]; 207 208 hw->wiphy->hw_version = priv->trans->hw_id; 209 210 iwl_leds_init(priv); 211 212 ret = ieee80211_register_hw(priv->hw); 213 if (ret) { 214 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret); 215 iwl_leds_exit(priv); 216 return ret; 217 } 218 priv->mac80211_registered = 1; 219 220 return 0; 221} 222 223void iwlagn_mac_unregister(struct iwl_priv *priv) 224{ 225 if (!priv->mac80211_registered) 226 return; 227 iwl_leds_exit(priv); 228 ieee80211_unregister_hw(priv->hw); 229 priv->mac80211_registered = 0; 230} 231 232static int __iwl_up(struct iwl_priv *priv) 233{ 234 struct iwl_rxon_context *ctx; 235 int ret; 236 237 lockdep_assert_held(&priv->mutex); 238 239 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) { 240 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n"); 241 return -EIO; 242 } 243 244 for_each_context(priv, ctx) { 245 ret = iwlagn_alloc_bcast_station(priv, ctx); 246 if (ret) { 247 iwl_dealloc_bcast_stations(priv); 248 return ret; 249 } 250 } 251 252 ret = iwl_run_init_ucode(priv); 253 if (ret) { 254 IWL_ERR(priv, "Failed to run INIT ucode: %d\n", ret); 255 goto error; 256 } 257 258 ret = iwl_load_ucode_wait_alive(priv, IWL_UCODE_REGULAR); 259 if (ret) { 260 IWL_ERR(priv, "Failed to start RT ucode: %d\n", ret); 261 goto error; 262 } 263 264 ret = iwl_alive_start(priv); 265 if (ret) 266 goto error; 267 return 0; 268 269 error: 270 set_bit(STATUS_EXIT_PENDING, &priv->status); 271 iwl_down(priv); 272 clear_bit(STATUS_EXIT_PENDING, &priv->status); 273 274 IWL_ERR(priv, "Unable to initialize device.\n"); 275 return ret; 276} 277 278static int iwlagn_mac_start(struct ieee80211_hw *hw) 279{ 280 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 281 int ret; 282 283 IWL_DEBUG_MAC80211(priv, "enter\n"); 284 285 /* we should be verifying the device is ready to be opened */ 286 mutex_lock(&priv->mutex); 287 ret = __iwl_up(priv); 288 mutex_unlock(&priv->mutex); 289 if (ret) 290 return ret; 291 292 IWL_DEBUG_INFO(priv, "Start UP work done.\n"); 293 294 /* Now we should be done, and the READY bit should be set. */ 295 if (WARN_ON(!test_bit(STATUS_READY, &priv->status))) 296 ret = -EIO; 297 298 iwlagn_led_enable(priv); 299 300 priv->is_open = 1; 301 IWL_DEBUG_MAC80211(priv, "leave\n"); 302 return 0; 303} 304 305static void iwlagn_mac_stop(struct ieee80211_hw *hw) 306{ 307 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 308 309 IWL_DEBUG_MAC80211(priv, "enter\n"); 310 311 if (!priv->is_open) 312 return; 313 314 priv->is_open = 0; 315 316 mutex_lock(&priv->mutex); 317 iwl_down(priv); 318 mutex_unlock(&priv->mutex); 319 320 iwl_cancel_deferred_work(priv); 321 322 flush_workqueue(priv->workqueue); 323 324 IWL_DEBUG_MAC80211(priv, "leave\n"); 325} 326 327static void iwlagn_mac_set_rekey_data(struct ieee80211_hw *hw, 328 struct ieee80211_vif *vif, 329 struct cfg80211_gtk_rekey_data *data) 330{ 331 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 332 333 if (iwlwifi_mod_params.sw_crypto) 334 return; 335 336 IWL_DEBUG_MAC80211(priv, "enter\n"); 337 mutex_lock(&priv->mutex); 338 339 if (priv->contexts[IWL_RXON_CTX_BSS].vif != vif) 340 goto out; 341 342 memcpy(priv->kek, data->kek, NL80211_KEK_LEN); 343 memcpy(priv->kck, data->kck, NL80211_KCK_LEN); 344 priv->replay_ctr = 345 cpu_to_le64(be64_to_cpup((__be64 *)&data->replay_ctr)); 346 priv->have_rekey_data = true; 347 348 out: 349 mutex_unlock(&priv->mutex); 350 IWL_DEBUG_MAC80211(priv, "leave\n"); 351} 352 353#ifdef CONFIG_PM_SLEEP 354 355static int iwlagn_mac_suspend(struct ieee80211_hw *hw, 356 struct cfg80211_wowlan *wowlan) 357{ 358 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 359 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS]; 360 int ret; 361 362 if (WARN_ON(!wowlan)) 363 return -EINVAL; 364 365 IWL_DEBUG_MAC80211(priv, "enter\n"); 366 mutex_lock(&priv->mutex); 367 368 /* Don't attempt WoWLAN when not associated, tear down instead. */ 369 if (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION || 370 !iwl_is_associated_ctx(ctx)) { 371 ret = 1; 372 goto out; 373 } 374 375 ret = iwlagn_suspend(priv, wowlan); 376 if (ret) 377 goto error; 378 379 /* let the ucode operate on its own */ 380 iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_SET, 381 CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE); 382 383 iwl_trans_d3_suspend(priv->trans, false); 384 385 goto out; 386 387 error: 388 priv->wowlan = false; 389 iwlagn_prepare_restart(priv); 390 ieee80211_restart_hw(priv->hw); 391 out: 392 mutex_unlock(&priv->mutex); 393 IWL_DEBUG_MAC80211(priv, "leave\n"); 394 395 return ret; 396} 397 398struct iwl_resume_data { 399 struct iwl_priv *priv; 400 struct iwlagn_wowlan_status *cmd; 401 bool valid; 402}; 403 404static bool iwl_resume_status_fn(struct iwl_notif_wait_data *notif_wait, 405 struct iwl_rx_packet *pkt, void *data) 406{ 407 struct iwl_resume_data *resume_data = data; 408 struct iwl_priv *priv = resume_data->priv; 409 410 if (iwl_rx_packet_payload_len(pkt) != sizeof(*resume_data->cmd)) { 411 IWL_ERR(priv, "rx wrong size data\n"); 412 return true; 413 } 414 memcpy(resume_data->cmd, pkt->data, sizeof(*resume_data->cmd)); 415 resume_data->valid = true; 416 417 return true; 418} 419 420static int iwlagn_mac_resume(struct ieee80211_hw *hw) 421{ 422 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 423 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS]; 424 struct ieee80211_vif *vif; 425 u32 base; 426 int ret; 427 enum iwl_d3_status d3_status; 428 struct error_table_start { 429 /* cf. struct iwl_error_event_table */ 430 u32 valid; 431 u32 error_id; 432 } err_info; 433 struct iwl_notification_wait status_wait; 434 static const u8 status_cmd[] = { 435 REPLY_WOWLAN_GET_STATUS, 436 }; 437 struct iwlagn_wowlan_status status_data = {}; 438 struct iwl_resume_data resume_data = { 439 .priv = priv, 440 .cmd = &status_data, 441 .valid = false, 442 }; 443 struct cfg80211_wowlan_wakeup wakeup = { 444 .pattern_idx = -1, 445 }; 446#ifdef CONFIG_IWLWIFI_DEBUGFS 447 const struct fw_img *img; 448#endif 449 450 IWL_DEBUG_MAC80211(priv, "enter\n"); 451 mutex_lock(&priv->mutex); 452 453 /* we'll clear ctx->vif during iwlagn_prepare_restart() */ 454 vif = ctx->vif; 455 456 ret = iwl_trans_d3_resume(priv->trans, &d3_status, false); 457 if (ret) 458 goto out_unlock; 459 460 if (d3_status != IWL_D3_STATUS_ALIVE) { 461 IWL_INFO(priv, "Device was reset during suspend\n"); 462 goto out_unlock; 463 } 464 465 /* uCode is no longer operating by itself */ 466 iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_CLR, 467 CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE); 468 469 base = priv->device_pointers.error_event_table; 470 if (!iwlagn_hw_valid_rtc_data_addr(base)) { 471 IWL_WARN(priv, "Invalid error table during resume!\n"); 472 goto out_unlock; 473 } 474 475 iwl_trans_read_mem_bytes(priv->trans, base, 476 &err_info, sizeof(err_info)); 477 478 if (err_info.valid) { 479 IWL_INFO(priv, "error table is valid (%d, 0x%x)\n", 480 err_info.valid, err_info.error_id); 481 if (err_info.error_id == RF_KILL_INDICATOR_FOR_WOWLAN) { 482 wakeup.rfkill_release = true; 483 ieee80211_report_wowlan_wakeup(vif, &wakeup, 484 GFP_KERNEL); 485 } 486 goto out_unlock; 487 } 488 489#ifdef CONFIG_IWLWIFI_DEBUGFS 490 img = &priv->fw->img[IWL_UCODE_WOWLAN]; 491 if (!priv->wowlan_sram) 492 priv->wowlan_sram = 493 kzalloc(img->sec[IWL_UCODE_SECTION_DATA].len, 494 GFP_KERNEL); 495 496 if (priv->wowlan_sram) 497 iwl_trans_read_mem(priv->trans, 0x800000, 498 priv->wowlan_sram, 499 img->sec[IWL_UCODE_SECTION_DATA].len / 4); 500#endif 501 502 /* 503 * This is very strange. The GET_STATUS command is sent but the device 504 * doesn't reply properly, it seems it doesn't close the RBD so one is 505 * always left open ... As a result, we need to send another command 506 * and have to reset the driver afterwards. As we need to switch to 507 * runtime firmware again that'll happen. 508 */ 509 510 iwl_init_notification_wait(&priv->notif_wait, &status_wait, status_cmd, 511 ARRAY_SIZE(status_cmd), iwl_resume_status_fn, 512 &resume_data); 513 514 iwl_dvm_send_cmd_pdu(priv, REPLY_WOWLAN_GET_STATUS, CMD_ASYNC, 0, NULL); 515 iwl_dvm_send_cmd_pdu(priv, REPLY_ECHO, CMD_ASYNC, 0, NULL); 516 /* an RBD is left open in the firmware now! */ 517 518 ret = iwl_wait_notification(&priv->notif_wait, &status_wait, HZ/5); 519 if (ret) 520 goto out_unlock; 521 522 if (resume_data.valid && priv->contexts[IWL_RXON_CTX_BSS].vif) { 523 u32 reasons = le32_to_cpu(status_data.wakeup_reason); 524 struct cfg80211_wowlan_wakeup *wakeup_report; 525 526 IWL_INFO(priv, "WoWLAN wakeup reason(s): 0x%.8x\n", reasons); 527 528 if (reasons) { 529 if (reasons & IWLAGN_WOWLAN_WAKEUP_MAGIC_PACKET) 530 wakeup.magic_pkt = true; 531 if (reasons & IWLAGN_WOWLAN_WAKEUP_PATTERN_MATCH) 532 wakeup.pattern_idx = status_data.pattern_number; 533 if (reasons & (IWLAGN_WOWLAN_WAKEUP_BEACON_MISS | 534 IWLAGN_WOWLAN_WAKEUP_LINK_CHANGE)) 535 wakeup.disconnect = true; 536 if (reasons & IWLAGN_WOWLAN_WAKEUP_GTK_REKEY_FAIL) 537 wakeup.gtk_rekey_failure = true; 538 if (reasons & IWLAGN_WOWLAN_WAKEUP_EAP_IDENT_REQ) 539 wakeup.eap_identity_req = true; 540 if (reasons & IWLAGN_WOWLAN_WAKEUP_4WAY_HANDSHAKE) 541 wakeup.four_way_handshake = true; 542 wakeup_report = &wakeup; 543 } else { 544 wakeup_report = NULL; 545 } 546 547 ieee80211_report_wowlan_wakeup(vif, wakeup_report, GFP_KERNEL); 548 } 549 550 priv->wowlan = false; 551 552 iwlagn_prepare_restart(priv); 553 554 memset((void *)&ctx->active, 0, sizeof(ctx->active)); 555 iwl_connection_init_rx_config(priv, ctx); 556 iwlagn_set_rxon_chain(priv, ctx); 557 558 out_unlock: 559 mutex_unlock(&priv->mutex); 560 IWL_DEBUG_MAC80211(priv, "leave\n"); 561 562 ieee80211_resume_disconnect(vif); 563 564 return 1; 565} 566 567static void iwlagn_mac_set_wakeup(struct ieee80211_hw *hw, bool enabled) 568{ 569 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 570 571 device_set_wakeup_enable(priv->trans->dev, enabled); 572} 573#endif 574 575static void iwlagn_mac_tx(struct ieee80211_hw *hw, 576 struct ieee80211_tx_control *control, 577 struct sk_buff *skb) 578{ 579 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 580 581 if (iwlagn_tx_skb(priv, control->sta, skb)) 582 ieee80211_free_txskb(hw, skb); 583} 584 585static void iwlagn_mac_update_tkip_key(struct ieee80211_hw *hw, 586 struct ieee80211_vif *vif, 587 struct ieee80211_key_conf *keyconf, 588 struct ieee80211_sta *sta, 589 u32 iv32, u16 *phase1key) 590{ 591 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 592 593 iwl_update_tkip_key(priv, vif, keyconf, sta, iv32, phase1key); 594} 595 596static int iwlagn_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd, 597 struct ieee80211_vif *vif, 598 struct ieee80211_sta *sta, 599 struct ieee80211_key_conf *key) 600{ 601 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 602 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv; 603 struct iwl_rxon_context *ctx = vif_priv->ctx; 604 int ret; 605 bool is_default_wep_key = false; 606 607 IWL_DEBUG_MAC80211(priv, "enter\n"); 608 609 if (iwlwifi_mod_params.sw_crypto) { 610 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n"); 611 return -EOPNOTSUPP; 612 } 613 614 switch (key->cipher) { 615 case WLAN_CIPHER_SUITE_TKIP: 616 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC; 617 /* fall through */ 618 case WLAN_CIPHER_SUITE_CCMP: 619 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV; 620 break; 621 default: 622 break; 623 } 624 625 /* 626 * We could program these keys into the hardware as well, but we 627 * don't expect much multicast traffic in IBSS and having keys 628 * for more stations is probably more useful. 629 * 630 * Mark key TX-only and return 0. 631 */ 632 if (vif->type == NL80211_IFTYPE_ADHOC && 633 !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) { 634 key->hw_key_idx = WEP_INVALID_OFFSET; 635 return 0; 636 } 637 638 /* If they key was TX-only, accept deletion */ 639 if (cmd == DISABLE_KEY && key->hw_key_idx == WEP_INVALID_OFFSET) 640 return 0; 641 642 mutex_lock(&priv->mutex); 643 iwl_scan_cancel_timeout(priv, 100); 644 645 BUILD_BUG_ON(WEP_INVALID_OFFSET == IWLAGN_HW_KEY_DEFAULT); 646 647 /* 648 * If we are getting WEP group key and we didn't receive any key mapping 649 * so far, we are in legacy wep mode (group key only), otherwise we are 650 * in 1X mode. 651 * In legacy wep mode, we use another host command to the uCode. 652 */ 653 if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 || 654 key->cipher == WLAN_CIPHER_SUITE_WEP104) && !sta) { 655 if (cmd == SET_KEY) 656 is_default_wep_key = !ctx->key_mapping_keys; 657 else 658 is_default_wep_key = 659 key->hw_key_idx == IWLAGN_HW_KEY_DEFAULT; 660 } 661 662 663 switch (cmd) { 664 case SET_KEY: 665 if (is_default_wep_key) { 666 ret = iwl_set_default_wep_key(priv, vif_priv->ctx, key); 667 break; 668 } 669 ret = iwl_set_dynamic_key(priv, vif_priv->ctx, key, sta); 670 if (ret) { 671 /* 672 * can't add key for RX, but we don't need it 673 * in the device for TX so still return 0 674 */ 675 ret = 0; 676 key->hw_key_idx = WEP_INVALID_OFFSET; 677 } 678 679 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n"); 680 break; 681 case DISABLE_KEY: 682 if (is_default_wep_key) 683 ret = iwl_remove_default_wep_key(priv, ctx, key); 684 else 685 ret = iwl_remove_dynamic_key(priv, ctx, key, sta); 686 687 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n"); 688 break; 689 default: 690 ret = -EINVAL; 691 } 692 693 mutex_unlock(&priv->mutex); 694 IWL_DEBUG_MAC80211(priv, "leave\n"); 695 696 return ret; 697} 698 699static inline bool iwl_enable_rx_ampdu(const struct iwl_cfg *cfg) 700{ 701 if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG) 702 return false; 703 return true; 704} 705 706static inline bool iwl_enable_tx_ampdu(const struct iwl_cfg *cfg) 707{ 708 if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG) 709 return false; 710 if (iwlwifi_mod_params.disable_11n & IWL_ENABLE_HT_TXAGG) 711 return true; 712 713 /* disabled by default */ 714 return false; 715} 716 717static int iwlagn_mac_ampdu_action(struct ieee80211_hw *hw, 718 struct ieee80211_vif *vif, 719 enum ieee80211_ampdu_mlme_action action, 720 struct ieee80211_sta *sta, u16 tid, u16 *ssn, 721 u8 buf_size) 722{ 723 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 724 int ret = -EINVAL; 725 struct iwl_station_priv *sta_priv = (void *) sta->drv_priv; 726 727 IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n", 728 sta->addr, tid); 729 730 if (!(priv->nvm_data->sku_cap_11n_enable)) 731 return -EACCES; 732 733 IWL_DEBUG_MAC80211(priv, "enter\n"); 734 mutex_lock(&priv->mutex); 735 736 switch (action) { 737 case IEEE80211_AMPDU_RX_START: 738 if (!iwl_enable_rx_ampdu(priv->cfg)) 739 break; 740 IWL_DEBUG_HT(priv, "start Rx\n"); 741 ret = iwl_sta_rx_agg_start(priv, sta, tid, *ssn); 742 break; 743 case IEEE80211_AMPDU_RX_STOP: 744 IWL_DEBUG_HT(priv, "stop Rx\n"); 745 ret = iwl_sta_rx_agg_stop(priv, sta, tid); 746 break; 747 case IEEE80211_AMPDU_TX_START: 748 if (!priv->trans->ops->txq_enable) 749 break; 750 if (!iwl_enable_tx_ampdu(priv->cfg)) 751 break; 752 IWL_DEBUG_HT(priv, "start Tx\n"); 753 ret = iwlagn_tx_agg_start(priv, vif, sta, tid, ssn); 754 break; 755 case IEEE80211_AMPDU_TX_STOP_FLUSH: 756 case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT: 757 IWL_DEBUG_HT(priv, "Flush Tx\n"); 758 ret = iwlagn_tx_agg_flush(priv, vif, sta, tid); 759 break; 760 case IEEE80211_AMPDU_TX_STOP_CONT: 761 IWL_DEBUG_HT(priv, "stop Tx\n"); 762 ret = iwlagn_tx_agg_stop(priv, vif, sta, tid); 763 if ((ret == 0) && (priv->agg_tids_count > 0)) { 764 priv->agg_tids_count--; 765 IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n", 766 priv->agg_tids_count); 767 } 768 if (!priv->agg_tids_count && 769 priv->hw_params.use_rts_for_aggregation) { 770 /* 771 * switch off RTS/CTS if it was previously enabled 772 */ 773 sta_priv->lq_sta.lq.general_params.flags &= 774 ~LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK; 775 iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif), 776 &sta_priv->lq_sta.lq, CMD_ASYNC, false); 777 } 778 break; 779 case IEEE80211_AMPDU_TX_OPERATIONAL: 780 ret = iwlagn_tx_agg_oper(priv, vif, sta, tid, buf_size); 781 break; 782 } 783 mutex_unlock(&priv->mutex); 784 IWL_DEBUG_MAC80211(priv, "leave\n"); 785 return ret; 786} 787 788static int iwlagn_mac_sta_add(struct ieee80211_hw *hw, 789 struct ieee80211_vif *vif, 790 struct ieee80211_sta *sta) 791{ 792 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 793 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv; 794 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv; 795 bool is_ap = vif->type == NL80211_IFTYPE_STATION; 796 int ret; 797 u8 sta_id; 798 799 IWL_DEBUG_INFO(priv, "proceeding to add station %pM\n", 800 sta->addr); 801 sta_priv->sta_id = IWL_INVALID_STATION; 802 803 atomic_set(&sta_priv->pending_frames, 0); 804 if (vif->type == NL80211_IFTYPE_AP) 805 sta_priv->client = true; 806 807 ret = iwl_add_station_common(priv, vif_priv->ctx, sta->addr, 808 is_ap, sta, &sta_id); 809 if (ret) { 810 IWL_ERR(priv, "Unable to add station %pM (%d)\n", 811 sta->addr, ret); 812 /* Should we return success if return code is EEXIST ? */ 813 return ret; 814 } 815 816 sta_priv->sta_id = sta_id; 817 818 return 0; 819} 820 821static int iwlagn_mac_sta_remove(struct ieee80211_hw *hw, 822 struct ieee80211_vif *vif, 823 struct ieee80211_sta *sta) 824{ 825 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 826 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv; 827 int ret; 828 829 IWL_DEBUG_INFO(priv, "proceeding to remove station %pM\n", sta->addr); 830 831 if (vif->type == NL80211_IFTYPE_STATION) { 832 /* 833 * Station will be removed from device when the RXON 834 * is set to unassociated -- just deactivate it here 835 * to avoid re-programming it. 836 */ 837 ret = 0; 838 iwl_deactivate_station(priv, sta_priv->sta_id, sta->addr); 839 } else { 840 ret = iwl_remove_station(priv, sta_priv->sta_id, sta->addr); 841 if (ret) 842 IWL_DEBUG_QUIET_RFKILL(priv, 843 "Error removing station %pM\n", sta->addr); 844 } 845 return ret; 846} 847 848static int iwlagn_mac_sta_state(struct ieee80211_hw *hw, 849 struct ieee80211_vif *vif, 850 struct ieee80211_sta *sta, 851 enum ieee80211_sta_state old_state, 852 enum ieee80211_sta_state new_state) 853{ 854 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 855 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv; 856 enum { 857 NONE, ADD, REMOVE, HT_RATE_INIT, ADD_RATE_INIT, 858 } op = NONE; 859 int ret; 860 861 IWL_DEBUG_MAC80211(priv, "station %pM state change %d->%d\n", 862 sta->addr, old_state, new_state); 863 864 mutex_lock(&priv->mutex); 865 if (vif->type == NL80211_IFTYPE_STATION) { 866 if (old_state == IEEE80211_STA_NOTEXIST && 867 new_state == IEEE80211_STA_NONE) 868 op = ADD; 869 else if (old_state == IEEE80211_STA_NONE && 870 new_state == IEEE80211_STA_NOTEXIST) 871 op = REMOVE; 872 else if (old_state == IEEE80211_STA_AUTH && 873 new_state == IEEE80211_STA_ASSOC) 874 op = HT_RATE_INIT; 875 } else { 876 if (old_state == IEEE80211_STA_AUTH && 877 new_state == IEEE80211_STA_ASSOC) 878 op = ADD_RATE_INIT; 879 else if (old_state == IEEE80211_STA_ASSOC && 880 new_state == IEEE80211_STA_AUTH) 881 op = REMOVE; 882 } 883 884 switch (op) { 885 case ADD: 886 ret = iwlagn_mac_sta_add(hw, vif, sta); 887 if (ret) 888 break; 889 /* 890 * Clear the in-progress flag, the AP station entry was added 891 * but we'll initialize LQ only when we've associated (which 892 * would also clear the in-progress flag). This is necessary 893 * in case we never initialize LQ because association fails. 894 */ 895 spin_lock_bh(&priv->sta_lock); 896 priv->stations[iwl_sta_id(sta)].used &= 897 ~IWL_STA_UCODE_INPROGRESS; 898 spin_unlock_bh(&priv->sta_lock); 899 break; 900 case REMOVE: 901 ret = iwlagn_mac_sta_remove(hw, vif, sta); 902 break; 903 case ADD_RATE_INIT: 904 ret = iwlagn_mac_sta_add(hw, vif, sta); 905 if (ret) 906 break; 907 /* Initialize rate scaling */ 908 IWL_DEBUG_INFO(priv, 909 "Initializing rate scaling for station %pM\n", 910 sta->addr); 911 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta)); 912 ret = 0; 913 break; 914 case HT_RATE_INIT: 915 /* Initialize rate scaling */ 916 ret = iwl_sta_update_ht(priv, vif_priv->ctx, sta); 917 if (ret) 918 break; 919 IWL_DEBUG_INFO(priv, 920 "Initializing rate scaling for station %pM\n", 921 sta->addr); 922 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta)); 923 ret = 0; 924 break; 925 default: 926 ret = 0; 927 break; 928 } 929 930 /* 931 * mac80211 might WARN if we fail, but due the way we 932 * (badly) handle hard rfkill, we might fail here 933 */ 934 if (iwl_is_rfkill(priv)) 935 ret = 0; 936 937 mutex_unlock(&priv->mutex); 938 IWL_DEBUG_MAC80211(priv, "leave\n"); 939 940 return ret; 941} 942 943static void iwlagn_mac_channel_switch(struct ieee80211_hw *hw, 944 struct ieee80211_channel_switch *ch_switch) 945{ 946 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 947 struct ieee80211_conf *conf = &hw->conf; 948 struct ieee80211_channel *channel = ch_switch->chandef.chan; 949 struct iwl_ht_config *ht_conf = &priv->current_ht_config; 950 /* 951 * MULTI-FIXME 952 * When we add support for multiple interfaces, we need to 953 * revisit this. The channel switch command in the device 954 * only affects the BSS context, but what does that really 955 * mean? And what if we get a CSA on the second interface? 956 * This needs a lot of work. 957 */ 958 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS]; 959 u16 ch; 960 961 IWL_DEBUG_MAC80211(priv, "enter\n"); 962 963 mutex_lock(&priv->mutex); 964 965 if (iwl_is_rfkill(priv)) 966 goto out; 967 968 if (test_bit(STATUS_EXIT_PENDING, &priv->status) || 969 test_bit(STATUS_SCANNING, &priv->status) || 970 test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status)) 971 goto out; 972 973 if (!iwl_is_associated_ctx(ctx)) 974 goto out; 975 976 if (!priv->lib->set_channel_switch) 977 goto out; 978 979 ch = channel->hw_value; 980 if (le16_to_cpu(ctx->active.channel) == ch) 981 goto out; 982 983 priv->current_ht_config.smps = conf->smps_mode; 984 985 /* Configure HT40 channels */ 986 switch (cfg80211_get_chandef_type(&ch_switch->chandef)) { 987 case NL80211_CHAN_NO_HT: 988 case NL80211_CHAN_HT20: 989 ctx->ht.is_40mhz = false; 990 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE; 991 break; 992 case NL80211_CHAN_HT40MINUS: 993 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_BELOW; 994 ctx->ht.is_40mhz = true; 995 break; 996 case NL80211_CHAN_HT40PLUS: 997 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_ABOVE; 998 ctx->ht.is_40mhz = true; 999 break; 1000 } 1001 1002 if ((le16_to_cpu(ctx->staging.channel) != ch)) 1003 ctx->staging.flags = 0; 1004 1005 iwl_set_rxon_channel(priv, channel, ctx); 1006 iwl_set_rxon_ht(priv, ht_conf); 1007 iwl_set_flags_for_band(priv, ctx, channel->band, ctx->vif); 1008 1009 /* 1010 * at this point, staging_rxon has the 1011 * configuration for channel switch 1012 */ 1013 set_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status); 1014 priv->switch_channel = cpu_to_le16(ch); 1015 if (priv->lib->set_channel_switch(priv, ch_switch)) { 1016 clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status); 1017 priv->switch_channel = 0; 1018 ieee80211_chswitch_done(ctx->vif, false); 1019 } 1020 1021out: 1022 mutex_unlock(&priv->mutex); 1023 IWL_DEBUG_MAC80211(priv, "leave\n"); 1024} 1025 1026void iwl_chswitch_done(struct iwl_priv *priv, bool is_success) 1027{ 1028 /* 1029 * MULTI-FIXME 1030 * See iwlagn_mac_channel_switch. 1031 */ 1032 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS]; 1033 1034 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) 1035 return; 1036 1037 if (!test_and_clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status)) 1038 return; 1039 1040 if (ctx->vif) 1041 ieee80211_chswitch_done(ctx->vif, is_success); 1042} 1043 1044static void iwlagn_configure_filter(struct ieee80211_hw *hw, 1045 unsigned int changed_flags, 1046 unsigned int *total_flags, 1047 u64 multicast) 1048{ 1049 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1050 __le32 filter_or = 0, filter_nand = 0; 1051 struct iwl_rxon_context *ctx; 1052 1053#define CHK(test, flag) do { \ 1054 if (*total_flags & (test)) \ 1055 filter_or |= (flag); \ 1056 else \ 1057 filter_nand |= (flag); \ 1058 } while (0) 1059 1060 IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n", 1061 changed_flags, *total_flags); 1062 1063 CHK(FIF_OTHER_BSS | FIF_PROMISC_IN_BSS, RXON_FILTER_PROMISC_MSK); 1064 /* Setting _just_ RXON_FILTER_CTL2HOST_MSK causes FH errors */ 1065 CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_PROMISC_MSK); 1066 CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK); 1067 1068#undef CHK 1069 1070 mutex_lock(&priv->mutex); 1071 1072 for_each_context(priv, ctx) { 1073 ctx->staging.filter_flags &= ~filter_nand; 1074 ctx->staging.filter_flags |= filter_or; 1075 1076 /* 1077 * Not committing directly because hardware can perform a scan, 1078 * but we'll eventually commit the filter flags change anyway. 1079 */ 1080 } 1081 1082 mutex_unlock(&priv->mutex); 1083 1084 /* 1085 * Receiving all multicast frames is always enabled by the 1086 * default flags setup in iwl_connection_init_rx_config() 1087 * since we currently do not support programming multicast 1088 * filters into the device. 1089 */ 1090 *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS | 1091 FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL; 1092} 1093 1094static void iwlagn_mac_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 1095 u32 queues, bool drop) 1096{ 1097 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1098 u32 scd_queues; 1099 1100 mutex_lock(&priv->mutex); 1101 IWL_DEBUG_MAC80211(priv, "enter\n"); 1102 1103 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) { 1104 IWL_DEBUG_TX(priv, "Aborting flush due to device shutdown\n"); 1105 goto done; 1106 } 1107 if (iwl_is_rfkill(priv)) { 1108 IWL_DEBUG_TX(priv, "Aborting flush due to RF Kill\n"); 1109 goto done; 1110 } 1111 1112 scd_queues = BIT(priv->cfg->base_params->num_of_queues) - 1; 1113 scd_queues &= ~(BIT(IWL_IPAN_CMD_QUEUE_NUM) | 1114 BIT(IWL_DEFAULT_CMD_QUEUE_NUM)); 1115 1116 if (vif) 1117 scd_queues &= ~BIT(vif->hw_queue[IEEE80211_AC_VO]); 1118 1119 IWL_DEBUG_TX_QUEUES(priv, "Flushing SCD queues: 0x%x\n", scd_queues); 1120 if (iwlagn_txfifo_flush(priv, scd_queues)) { 1121 IWL_ERR(priv, "flush request fail\n"); 1122 goto done; 1123 } 1124 IWL_DEBUG_TX_QUEUES(priv, "wait transmit/flush all frames\n"); 1125 iwl_trans_wait_tx_queue_empty(priv->trans, 0xffffffff); 1126done: 1127 mutex_unlock(&priv->mutex); 1128 IWL_DEBUG_MAC80211(priv, "leave\n"); 1129} 1130 1131static void iwlagn_mac_rssi_callback(struct ieee80211_hw *hw, 1132 struct ieee80211_vif *vif, 1133 enum ieee80211_rssi_event rssi_event) 1134{ 1135 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1136 1137 IWL_DEBUG_MAC80211(priv, "enter\n"); 1138 mutex_lock(&priv->mutex); 1139 1140 if (priv->lib->bt_params && 1141 priv->lib->bt_params->advanced_bt_coexist) { 1142 if (rssi_event == RSSI_EVENT_LOW) 1143 priv->bt_enable_pspoll = true; 1144 else if (rssi_event == RSSI_EVENT_HIGH) 1145 priv->bt_enable_pspoll = false; 1146 1147 iwlagn_send_advance_bt_config(priv); 1148 } else { 1149 IWL_DEBUG_MAC80211(priv, "Advanced BT coex disabled," 1150 "ignoring RSSI callback\n"); 1151 } 1152 1153 mutex_unlock(&priv->mutex); 1154 IWL_DEBUG_MAC80211(priv, "leave\n"); 1155} 1156 1157static int iwlagn_mac_set_tim(struct ieee80211_hw *hw, 1158 struct ieee80211_sta *sta, bool set) 1159{ 1160 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1161 1162 queue_work(priv->workqueue, &priv->beacon_update); 1163 1164 return 0; 1165} 1166 1167static int iwlagn_mac_conf_tx(struct ieee80211_hw *hw, 1168 struct ieee80211_vif *vif, u16 queue, 1169 const struct ieee80211_tx_queue_params *params) 1170{ 1171 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1172 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv; 1173 struct iwl_rxon_context *ctx = vif_priv->ctx; 1174 int q; 1175 1176 if (WARN_ON(!ctx)) 1177 return -EINVAL; 1178 1179 IWL_DEBUG_MAC80211(priv, "enter\n"); 1180 1181 if (!iwl_is_ready_rf(priv)) { 1182 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n"); 1183 return -EIO; 1184 } 1185 1186 if (queue >= AC_NUM) { 1187 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue); 1188 return 0; 1189 } 1190 1191 q = AC_NUM - 1 - queue; 1192 1193 mutex_lock(&priv->mutex); 1194 1195 ctx->qos_data.def_qos_parm.ac[q].cw_min = 1196 cpu_to_le16(params->cw_min); 1197 ctx->qos_data.def_qos_parm.ac[q].cw_max = 1198 cpu_to_le16(params->cw_max); 1199 ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs; 1200 ctx->qos_data.def_qos_parm.ac[q].edca_txop = 1201 cpu_to_le16((params->txop * 32)); 1202 1203 ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0; 1204 1205 mutex_unlock(&priv->mutex); 1206 1207 IWL_DEBUG_MAC80211(priv, "leave\n"); 1208 return 0; 1209} 1210 1211static int iwlagn_mac_tx_last_beacon(struct ieee80211_hw *hw) 1212{ 1213 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1214 1215 return priv->ibss_manager == IWL_IBSS_MANAGER; 1216} 1217 1218static int iwl_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx) 1219{ 1220 iwl_connection_init_rx_config(priv, ctx); 1221 1222 iwlagn_set_rxon_chain(priv, ctx); 1223 1224 return iwlagn_commit_rxon(priv, ctx); 1225} 1226 1227static int iwl_setup_interface(struct iwl_priv *priv, 1228 struct iwl_rxon_context *ctx) 1229{ 1230 struct ieee80211_vif *vif = ctx->vif; 1231 int err, ac; 1232 1233 lockdep_assert_held(&priv->mutex); 1234 1235 /* 1236 * This variable will be correct only when there's just 1237 * a single context, but all code using it is for hardware 1238 * that supports only one context. 1239 */ 1240 priv->iw_mode = vif->type; 1241 1242 ctx->is_active = true; 1243 1244 err = iwl_set_mode(priv, ctx); 1245 if (err) { 1246 if (!ctx->always_active) 1247 ctx->is_active = false; 1248 return err; 1249 } 1250 1251 if (priv->lib->bt_params && priv->lib->bt_params->advanced_bt_coexist && 1252 vif->type == NL80211_IFTYPE_ADHOC) { 1253 /* 1254 * pretend to have high BT traffic as long as we 1255 * are operating in IBSS mode, as this will cause 1256 * the rate scaling etc. to behave as intended. 1257 */ 1258 priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH; 1259 } 1260 1261 /* set up queue mappings */ 1262 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 1263 vif->hw_queue[ac] = ctx->ac_to_queue[ac]; 1264 1265 if (vif->type == NL80211_IFTYPE_AP) 1266 vif->cab_queue = ctx->mcast_queue; 1267 else 1268 vif->cab_queue = IEEE80211_INVAL_HW_QUEUE; 1269 1270 return 0; 1271} 1272 1273static int iwlagn_mac_add_interface(struct ieee80211_hw *hw, 1274 struct ieee80211_vif *vif) 1275{ 1276 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1277 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv; 1278 struct iwl_rxon_context *tmp, *ctx = NULL; 1279 int err; 1280 enum nl80211_iftype viftype = ieee80211_vif_type_p2p(vif); 1281 bool reset = false; 1282 1283 IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n", 1284 viftype, vif->addr); 1285 1286 mutex_lock(&priv->mutex); 1287 1288 if (!iwl_is_ready_rf(priv)) { 1289 IWL_WARN(priv, "Try to add interface when device not ready\n"); 1290 err = -EINVAL; 1291 goto out; 1292 } 1293 1294 for_each_context(priv, tmp) { 1295 u32 possible_modes = 1296 tmp->interface_modes | tmp->exclusive_interface_modes; 1297 1298 if (tmp->vif) { 1299 /* On reset we need to add the same interface again */ 1300 if (tmp->vif == vif) { 1301 reset = true; 1302 ctx = tmp; 1303 break; 1304 } 1305 1306 /* check if this busy context is exclusive */ 1307 if (tmp->exclusive_interface_modes & 1308 BIT(tmp->vif->type)) { 1309 err = -EINVAL; 1310 goto out; 1311 } 1312 continue; 1313 } 1314 1315 if (!(possible_modes & BIT(viftype))) 1316 continue; 1317 1318 /* have maybe usable context w/o interface */ 1319 ctx = tmp; 1320 break; 1321 } 1322 1323 if (!ctx) { 1324 err = -EOPNOTSUPP; 1325 goto out; 1326 } 1327 1328 vif_priv->ctx = ctx; 1329 ctx->vif = vif; 1330 1331 /* 1332 * In SNIFFER device type, the firmware reports the FCS to 1333 * the host, rather than snipping it off. Unfortunately, 1334 * mac80211 doesn't (yet) provide a per-packet flag for 1335 * this, so that we have to set the hardware flag based 1336 * on the interfaces added. As the monitor interface can 1337 * only be present by itself, and will be removed before 1338 * other interfaces are added, this is safe. 1339 */ 1340 if (vif->type == NL80211_IFTYPE_MONITOR) 1341 priv->hw->flags |= IEEE80211_HW_RX_INCLUDES_FCS; 1342 else 1343 priv->hw->flags &= ~IEEE80211_HW_RX_INCLUDES_FCS; 1344 1345 err = iwl_setup_interface(priv, ctx); 1346 if (!err || reset) 1347 goto out; 1348 1349 ctx->vif = NULL; 1350 priv->iw_mode = NL80211_IFTYPE_STATION; 1351 out: 1352 mutex_unlock(&priv->mutex); 1353 1354 IWL_DEBUG_MAC80211(priv, "leave\n"); 1355 return err; 1356} 1357 1358static void iwl_teardown_interface(struct iwl_priv *priv, 1359 struct ieee80211_vif *vif, 1360 bool mode_change) 1361{ 1362 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif); 1363 1364 lockdep_assert_held(&priv->mutex); 1365 1366 if (priv->scan_vif == vif) { 1367 iwl_scan_cancel_timeout(priv, 200); 1368 iwl_force_scan_end(priv); 1369 } 1370 1371 if (!mode_change) { 1372 iwl_set_mode(priv, ctx); 1373 if (!ctx->always_active) 1374 ctx->is_active = false; 1375 } 1376 1377 /* 1378 * When removing the IBSS interface, overwrite the 1379 * BT traffic load with the stored one from the last 1380 * notification, if any. If this is a device that 1381 * doesn't implement this, this has no effect since 1382 * both values are the same and zero. 1383 */ 1384 if (vif->type == NL80211_IFTYPE_ADHOC) 1385 priv->bt_traffic_load = priv->last_bt_traffic_load; 1386} 1387 1388static void iwlagn_mac_remove_interface(struct ieee80211_hw *hw, 1389 struct ieee80211_vif *vif) 1390{ 1391 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1392 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif); 1393 1394 IWL_DEBUG_MAC80211(priv, "enter\n"); 1395 1396 mutex_lock(&priv->mutex); 1397 1398 if (WARN_ON(ctx->vif != vif)) { 1399 struct iwl_rxon_context *tmp; 1400 IWL_ERR(priv, "ctx->vif = %p, vif = %p\n", ctx->vif, vif); 1401 for_each_context(priv, tmp) 1402 IWL_ERR(priv, "\tID = %d:\tctx = %p\tctx->vif = %p\n", 1403 tmp->ctxid, tmp, tmp->vif); 1404 } 1405 ctx->vif = NULL; 1406 1407 iwl_teardown_interface(priv, vif, false); 1408 1409 mutex_unlock(&priv->mutex); 1410 1411 IWL_DEBUG_MAC80211(priv, "leave\n"); 1412 1413} 1414 1415static int iwlagn_mac_change_interface(struct ieee80211_hw *hw, 1416 struct ieee80211_vif *vif, 1417 enum nl80211_iftype newtype, bool newp2p) 1418{ 1419 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1420 struct iwl_rxon_context *ctx, *tmp; 1421 enum nl80211_iftype newviftype = newtype; 1422 u32 interface_modes; 1423 int err; 1424 1425 IWL_DEBUG_MAC80211(priv, "enter\n"); 1426 1427 newtype = ieee80211_iftype_p2p(newtype, newp2p); 1428 1429 mutex_lock(&priv->mutex); 1430 1431 ctx = iwl_rxon_ctx_from_vif(vif); 1432 1433 /* 1434 * To simplify this code, only support changes on the 1435 * BSS context. The PAN context is usually reassigned 1436 * by creating/removing P2P interfaces anyway. 1437 */ 1438 if (ctx->ctxid != IWL_RXON_CTX_BSS) { 1439 err = -EBUSY; 1440 goto out; 1441 } 1442 1443 if (!ctx->vif || !iwl_is_ready_rf(priv)) { 1444 /* 1445 * Huh? But wait ... this can maybe happen when 1446 * we're in the middle of a firmware restart! 1447 */ 1448 err = -EBUSY; 1449 goto out; 1450 } 1451 1452 /* Check if the switch is supported in the same context */ 1453 interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes; 1454 if (!(interface_modes & BIT(newtype))) { 1455 err = -EBUSY; 1456 goto out; 1457 } 1458 1459 if (ctx->exclusive_interface_modes & BIT(newtype)) { 1460 for_each_context(priv, tmp) { 1461 if (ctx == tmp) 1462 continue; 1463 1464 if (!tmp->is_active) 1465 continue; 1466 1467 /* 1468 * The current mode switch would be exclusive, but 1469 * another context is active ... refuse the switch. 1470 */ 1471 err = -EBUSY; 1472 goto out; 1473 } 1474 } 1475 1476 /* success */ 1477 iwl_teardown_interface(priv, vif, true); 1478 vif->type = newviftype; 1479 vif->p2p = newp2p; 1480 err = iwl_setup_interface(priv, ctx); 1481 WARN_ON(err); 1482 /* 1483 * We've switched internally, but submitting to the 1484 * device may have failed for some reason. Mask this 1485 * error, because otherwise mac80211 will not switch 1486 * (and set the interface type back) and we'll be 1487 * out of sync with it. 1488 */ 1489 err = 0; 1490 1491 out: 1492 mutex_unlock(&priv->mutex); 1493 IWL_DEBUG_MAC80211(priv, "leave\n"); 1494 1495 return err; 1496} 1497 1498static int iwlagn_mac_hw_scan(struct ieee80211_hw *hw, 1499 struct ieee80211_vif *vif, 1500 struct ieee80211_scan_request *hw_req) 1501{ 1502 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1503 struct cfg80211_scan_request *req = &hw_req->req; 1504 int ret; 1505 1506 IWL_DEBUG_MAC80211(priv, "enter\n"); 1507 1508 if (req->n_channels == 0) 1509 return -EINVAL; 1510 1511 mutex_lock(&priv->mutex); 1512 1513 /* 1514 * If an internal scan is in progress, just set 1515 * up the scan_request as per above. 1516 */ 1517 if (priv->scan_type != IWL_SCAN_NORMAL) { 1518 IWL_DEBUG_SCAN(priv, 1519 "SCAN request during internal scan - defer\n"); 1520 priv->scan_request = req; 1521 priv->scan_vif = vif; 1522 ret = 0; 1523 } else { 1524 priv->scan_request = req; 1525 priv->scan_vif = vif; 1526 /* 1527 * mac80211 will only ask for one band at a time 1528 * so using channels[0] here is ok 1529 */ 1530 ret = iwl_scan_initiate(priv, vif, IWL_SCAN_NORMAL, 1531 req->channels[0]->band); 1532 if (ret) { 1533 priv->scan_request = NULL; 1534 priv->scan_vif = NULL; 1535 } 1536 } 1537 1538 IWL_DEBUG_MAC80211(priv, "leave\n"); 1539 1540 mutex_unlock(&priv->mutex); 1541 1542 return ret; 1543} 1544 1545static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id) 1546{ 1547 struct iwl_addsta_cmd cmd = { 1548 .mode = STA_CONTROL_MODIFY_MSK, 1549 .station_flags_msk = STA_FLG_PWR_SAVE_MSK, 1550 .sta.sta_id = sta_id, 1551 }; 1552 1553 iwl_send_add_sta(priv, &cmd, CMD_ASYNC); 1554} 1555 1556static void iwlagn_mac_sta_notify(struct ieee80211_hw *hw, 1557 struct ieee80211_vif *vif, 1558 enum sta_notify_cmd cmd, 1559 struct ieee80211_sta *sta) 1560{ 1561 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1562 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv; 1563 int sta_id; 1564 1565 IWL_DEBUG_MAC80211(priv, "enter\n"); 1566 1567 switch (cmd) { 1568 case STA_NOTIFY_SLEEP: 1569 WARN_ON(!sta_priv->client); 1570 sta_priv->asleep = true; 1571 if (atomic_read(&sta_priv->pending_frames) > 0) 1572 ieee80211_sta_block_awake(hw, sta, true); 1573 break; 1574 case STA_NOTIFY_AWAKE: 1575 WARN_ON(!sta_priv->client); 1576 if (!sta_priv->asleep) 1577 break; 1578 sta_priv->asleep = false; 1579 sta_id = iwl_sta_id(sta); 1580 if (sta_id != IWL_INVALID_STATION) 1581 iwl_sta_modify_ps_wake(priv, sta_id); 1582 break; 1583 default: 1584 break; 1585 } 1586 IWL_DEBUG_MAC80211(priv, "leave\n"); 1587} 1588 1589const struct ieee80211_ops iwlagn_hw_ops = { 1590 .tx = iwlagn_mac_tx, 1591 .start = iwlagn_mac_start, 1592 .stop = iwlagn_mac_stop, 1593#ifdef CONFIG_PM_SLEEP 1594 .suspend = iwlagn_mac_suspend, 1595 .resume = iwlagn_mac_resume, 1596 .set_wakeup = iwlagn_mac_set_wakeup, 1597#endif 1598 .add_interface = iwlagn_mac_add_interface, 1599 .remove_interface = iwlagn_mac_remove_interface, 1600 .change_interface = iwlagn_mac_change_interface, 1601 .config = iwlagn_mac_config, 1602 .configure_filter = iwlagn_configure_filter, 1603 .set_key = iwlagn_mac_set_key, 1604 .update_tkip_key = iwlagn_mac_update_tkip_key, 1605 .set_rekey_data = iwlagn_mac_set_rekey_data, 1606 .conf_tx = iwlagn_mac_conf_tx, 1607 .bss_info_changed = iwlagn_bss_info_changed, 1608 .ampdu_action = iwlagn_mac_ampdu_action, 1609 .hw_scan = iwlagn_mac_hw_scan, 1610 .sta_notify = iwlagn_mac_sta_notify, 1611 .sta_state = iwlagn_mac_sta_state, 1612 .channel_switch = iwlagn_mac_channel_switch, 1613 .flush = iwlagn_mac_flush, 1614 .tx_last_beacon = iwlagn_mac_tx_last_beacon, 1615 .rssi_callback = iwlagn_mac_rssi_callback, 1616 .set_tim = iwlagn_mac_set_tim, 1617}; 1618 1619/* This function both allocates and initializes hw and priv. */ 1620struct ieee80211_hw *iwl_alloc_all(void) 1621{ 1622 struct iwl_priv *priv; 1623 struct iwl_op_mode *op_mode; 1624 /* mac80211 allocates memory for this device instance, including 1625 * space for this driver's private structure */ 1626 struct ieee80211_hw *hw; 1627 1628 hw = ieee80211_alloc_hw(sizeof(struct iwl_priv) + 1629 sizeof(struct iwl_op_mode), &iwlagn_hw_ops); 1630 if (!hw) 1631 goto out; 1632 1633 op_mode = hw->priv; 1634 priv = IWL_OP_MODE_GET_DVM(op_mode); 1635 priv->hw = hw; 1636 1637out: 1638 return hw; 1639} 1640