mac80211.c revision 49464ae502680e362be519ac024a0f5998faaa7e
1/****************************************************************************** 2 * 3 * Copyright(c) 2003 - 2013 Intel Corporation. All rights reserved. 4 * 5 * Portions of this file are derived from the ipw3945 project, as well 6 * as portions of the ieee80211 subsystem header files. 7 * 8 * This program is free software; you can redistribute it and/or modify it 9 * under the terms of version 2 of the GNU General Public License as 10 * published by the Free Software Foundation. 11 * 12 * This program is distributed in the hope that it will be useful, but WITHOUT 13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 15 * more details. 16 * 17 * You should have received a copy of the GNU General Public License along with 18 * this program; if not, write to the Free Software Foundation, Inc., 19 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA 20 * 21 * The full GNU General Public License is included in this distribution in the 22 * file called LICENSE. 23 * 24 * Contact Information: 25 * Intel Linux Wireless <ilw@linux.intel.com> 26 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 27 * 28 *****************************************************************************/ 29#include <linux/kernel.h> 30#include <linux/module.h> 31#include <linux/init.h> 32#include <linux/slab.h> 33#include <linux/dma-mapping.h> 34#include <linux/delay.h> 35#include <linux/sched.h> 36#include <linux/skbuff.h> 37#include <linux/netdevice.h> 38#include <linux/etherdevice.h> 39#include <linux/if_arp.h> 40 41#include <net/ieee80211_radiotap.h> 42#include <net/mac80211.h> 43 44#include <asm/div64.h> 45 46#include "iwl-io.h" 47#include "iwl-trans.h" 48#include "iwl-op-mode.h" 49#include "iwl-modparams.h" 50 51#include "dev.h" 52#include "calib.h" 53#include "agn.h" 54 55/***************************************************************************** 56 * 57 * mac80211 entry point functions 58 * 59 *****************************************************************************/ 60 61static const struct ieee80211_iface_limit iwlagn_sta_ap_limits[] = { 62 { 63 .max = 1, 64 .types = BIT(NL80211_IFTYPE_STATION), 65 }, 66 { 67 .max = 1, 68 .types = BIT(NL80211_IFTYPE_AP), 69 }, 70}; 71 72static const struct ieee80211_iface_limit iwlagn_2sta_limits[] = { 73 { 74 .max = 2, 75 .types = BIT(NL80211_IFTYPE_STATION), 76 }, 77}; 78 79static const struct ieee80211_iface_limit iwlagn_p2p_sta_go_limits[] = { 80 { 81 .max = 1, 82 .types = BIT(NL80211_IFTYPE_STATION), 83 }, 84 { 85 .max = 1, 86 .types = BIT(NL80211_IFTYPE_P2P_GO) | 87 BIT(NL80211_IFTYPE_AP), 88 }, 89}; 90 91static const struct ieee80211_iface_limit iwlagn_p2p_2sta_limits[] = { 92 { 93 .max = 2, 94 .types = BIT(NL80211_IFTYPE_STATION), 95 }, 96 { 97 .max = 1, 98 .types = BIT(NL80211_IFTYPE_P2P_CLIENT), 99 }, 100}; 101 102static const struct ieee80211_iface_combination 103iwlagn_iface_combinations_dualmode[] = { 104 { .num_different_channels = 1, 105 .max_interfaces = 2, 106 .beacon_int_infra_match = true, 107 .limits = iwlagn_sta_ap_limits, 108 .n_limits = ARRAY_SIZE(iwlagn_sta_ap_limits), 109 }, 110 { .num_different_channels = 1, 111 .max_interfaces = 2, 112 .limits = iwlagn_2sta_limits, 113 .n_limits = ARRAY_SIZE(iwlagn_2sta_limits), 114 }, 115}; 116 117static const struct ieee80211_iface_combination 118iwlagn_iface_combinations_p2p[] = { 119 { .num_different_channels = 1, 120 .max_interfaces = 2, 121 .beacon_int_infra_match = true, 122 .limits = iwlagn_p2p_sta_go_limits, 123 .n_limits = ARRAY_SIZE(iwlagn_p2p_sta_go_limits), 124 }, 125 { .num_different_channels = 1, 126 .max_interfaces = 2, 127 .limits = iwlagn_p2p_2sta_limits, 128 .n_limits = ARRAY_SIZE(iwlagn_p2p_2sta_limits), 129 }, 130}; 131 132/* 133 * Not a mac80211 entry point function, but it fits in with all the 134 * other mac80211 functions grouped here. 135 */ 136int iwlagn_mac_setup_register(struct iwl_priv *priv, 137 const struct iwl_ucode_capabilities *capa) 138{ 139 int ret; 140 struct ieee80211_hw *hw = priv->hw; 141 struct iwl_rxon_context *ctx; 142 143 hw->rate_control_algorithm = "iwl-agn-rs"; 144 145 /* Tell mac80211 our characteristics */ 146 hw->flags = IEEE80211_HW_SIGNAL_DBM | 147 IEEE80211_HW_AMPDU_AGGREGATION | 148 IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC | 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; 155 156 hw->offchannel_tx_hw_queue = IWL_AUX_QUEUE; 157 hw->radiotap_mcs_details |= IEEE80211_RADIOTAP_MCS_HAVE_FMT; 158 159 /* 160 * Including the following line will crash some AP's. This 161 * workaround removes the stimulus which causes the crash until 162 * the AP software can be fixed. 163 hw->max_tx_aggregation_subframes = LINK_QUAL_AGG_FRAME_LIMIT_DEF; 164 */ 165 166 if (priv->nvm_data->sku_cap_11n_enable) 167 hw->flags |= IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS | 168 IEEE80211_HW_SUPPORTS_STATIC_SMPS; 169 170 /* 171 * Enable 11w if advertised by firmware and software crypto 172 * is not enabled (as the firmware will interpret some mgmt 173 * packets, so enabling it with software crypto isn't safe) 174 */ 175 if (priv->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_MFP && 176 !iwlwifi_mod_params.sw_crypto) 177 hw->flags |= IEEE80211_HW_MFP_CAPABLE; 178 179 hw->sta_data_size = sizeof(struct iwl_station_priv); 180 hw->vif_data_size = sizeof(struct iwl_vif_priv); 181 182 for_each_context(priv, ctx) { 183 hw->wiphy->interface_modes |= ctx->interface_modes; 184 hw->wiphy->interface_modes |= ctx->exclusive_interface_modes; 185 } 186 187 BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2); 188 189 if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_P2P_CLIENT)) { 190 hw->wiphy->iface_combinations = iwlagn_iface_combinations_p2p; 191 hw->wiphy->n_iface_combinations = 192 ARRAY_SIZE(iwlagn_iface_combinations_p2p); 193 } else if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) { 194 hw->wiphy->iface_combinations = 195 iwlagn_iface_combinations_dualmode; 196 hw->wiphy->n_iface_combinations = 197 ARRAY_SIZE(iwlagn_iface_combinations_dualmode); 198 } 199 200 hw->wiphy->max_remain_on_channel_duration = 500; 201 202 hw->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY | 203 WIPHY_FLAG_DISABLE_BEACON_HINTS | 204 WIPHY_FLAG_IBSS_RSN; 205 206#ifdef CONFIG_PM_SLEEP 207 if (priv->fw->img[IWL_UCODE_WOWLAN].sec[0].len && 208 priv->trans->ops->d3_suspend && 209 priv->trans->ops->d3_resume && 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 /* let the ucode operate on its own */ 430 iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_SET, 431 CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE); 432 433 iwl_trans_d3_suspend(priv->trans, false); 434 435 goto out; 436 437 error: 438 priv->wowlan = false; 439 iwlagn_prepare_restart(priv); 440 ieee80211_restart_hw(priv->hw); 441 out: 442 mutex_unlock(&priv->mutex); 443 IWL_DEBUG_MAC80211(priv, "leave\n"); 444 445 return ret; 446} 447 448struct iwl_resume_data { 449 struct iwl_priv *priv; 450 struct iwlagn_wowlan_status *cmd; 451 bool valid; 452}; 453 454static bool iwl_resume_status_fn(struct iwl_notif_wait_data *notif_wait, 455 struct iwl_rx_packet *pkt, void *data) 456{ 457 struct iwl_resume_data *resume_data = data; 458 struct iwl_priv *priv = resume_data->priv; 459 u32 len = le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK; 460 461 if (len - 4 != sizeof(*resume_data->cmd)) { 462 IWL_ERR(priv, "rx wrong size data\n"); 463 return true; 464 } 465 memcpy(resume_data->cmd, pkt->data, sizeof(*resume_data->cmd)); 466 resume_data->valid = true; 467 468 return true; 469} 470 471static int iwlagn_mac_resume(struct ieee80211_hw *hw) 472{ 473 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 474 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS]; 475 struct ieee80211_vif *vif; 476 u32 base; 477 int ret; 478 enum iwl_d3_status d3_status; 479 struct error_table_start { 480 /* cf. struct iwl_error_event_table */ 481 u32 valid; 482 u32 error_id; 483 } err_info; 484 struct iwl_notification_wait status_wait; 485 static const u8 status_cmd[] = { 486 REPLY_WOWLAN_GET_STATUS, 487 }; 488 struct iwlagn_wowlan_status status_data = {}; 489 struct iwl_resume_data resume_data = { 490 .priv = priv, 491 .cmd = &status_data, 492 .valid = false, 493 }; 494 struct cfg80211_wowlan_wakeup wakeup = { 495 .pattern_idx = -1, 496 }; 497#ifdef CONFIG_IWLWIFI_DEBUGFS 498 const struct fw_img *img; 499#endif 500 501 IWL_DEBUG_MAC80211(priv, "enter\n"); 502 mutex_lock(&priv->mutex); 503 504 /* we'll clear ctx->vif during iwlagn_prepare_restart() */ 505 vif = ctx->vif; 506 507 ret = iwl_trans_d3_resume(priv->trans, &d3_status, false); 508 if (ret) 509 goto out_unlock; 510 511 if (d3_status != IWL_D3_STATUS_ALIVE) { 512 IWL_INFO(priv, "Device was reset during suspend\n"); 513 goto out_unlock; 514 } 515 516 /* uCode is no longer operating by itself */ 517 iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_CLR, 518 CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE); 519 520 base = priv->device_pointers.error_event_table; 521 if (!iwlagn_hw_valid_rtc_data_addr(base)) { 522 IWL_WARN(priv, "Invalid error table during resume!\n"); 523 goto out_unlock; 524 } 525 526 iwl_trans_read_mem_bytes(priv->trans, base, 527 &err_info, sizeof(err_info)); 528 529 if (err_info.valid) { 530 IWL_INFO(priv, "error table is valid (%d, 0x%x)\n", 531 err_info.valid, err_info.error_id); 532 if (err_info.error_id == RF_KILL_INDICATOR_FOR_WOWLAN) { 533 wakeup.rfkill_release = true; 534 ieee80211_report_wowlan_wakeup(vif, &wakeup, 535 GFP_KERNEL); 536 } 537 goto out_unlock; 538 } 539 540#ifdef CONFIG_IWLWIFI_DEBUGFS 541 img = &priv->fw->img[IWL_UCODE_WOWLAN]; 542 if (!priv->wowlan_sram) 543 priv->wowlan_sram = 544 kzalloc(img->sec[IWL_UCODE_SECTION_DATA].len, 545 GFP_KERNEL); 546 547 if (priv->wowlan_sram) 548 iwl_trans_read_mem(priv->trans, 0x800000, 549 priv->wowlan_sram, 550 img->sec[IWL_UCODE_SECTION_DATA].len / 4); 551#endif 552 553 /* 554 * This is very strange. The GET_STATUS command is sent but the device 555 * doesn't reply properly, it seems it doesn't close the RBD so one is 556 * always left open ... As a result, we need to send another command 557 * and have to reset the driver afterwards. As we need to switch to 558 * runtime firmware again that'll happen. 559 */ 560 561 iwl_init_notification_wait(&priv->notif_wait, &status_wait, status_cmd, 562 ARRAY_SIZE(status_cmd), iwl_resume_status_fn, 563 &resume_data); 564 565 iwl_dvm_send_cmd_pdu(priv, REPLY_WOWLAN_GET_STATUS, CMD_ASYNC, 0, NULL); 566 iwl_dvm_send_cmd_pdu(priv, REPLY_ECHO, CMD_ASYNC, 0, NULL); 567 /* an RBD is left open in the firmware now! */ 568 569 ret = iwl_wait_notification(&priv->notif_wait, &status_wait, HZ/5); 570 if (ret) 571 goto out_unlock; 572 573 if (resume_data.valid && priv->contexts[IWL_RXON_CTX_BSS].vif) { 574 u32 reasons = le32_to_cpu(status_data.wakeup_reason); 575 struct cfg80211_wowlan_wakeup *wakeup_report; 576 577 IWL_INFO(priv, "WoWLAN wakeup reason(s): 0x%.8x\n", reasons); 578 579 if (reasons) { 580 if (reasons & IWLAGN_WOWLAN_WAKEUP_MAGIC_PACKET) 581 wakeup.magic_pkt = true; 582 if (reasons & IWLAGN_WOWLAN_WAKEUP_PATTERN_MATCH) 583 wakeup.pattern_idx = status_data.pattern_number; 584 if (reasons & (IWLAGN_WOWLAN_WAKEUP_BEACON_MISS | 585 IWLAGN_WOWLAN_WAKEUP_LINK_CHANGE)) 586 wakeup.disconnect = true; 587 if (reasons & IWLAGN_WOWLAN_WAKEUP_GTK_REKEY_FAIL) 588 wakeup.gtk_rekey_failure = true; 589 if (reasons & IWLAGN_WOWLAN_WAKEUP_EAP_IDENT_REQ) 590 wakeup.eap_identity_req = true; 591 if (reasons & IWLAGN_WOWLAN_WAKEUP_4WAY_HANDSHAKE) 592 wakeup.four_way_handshake = true; 593 wakeup_report = &wakeup; 594 } else { 595 wakeup_report = NULL; 596 } 597 598 ieee80211_report_wowlan_wakeup(vif, wakeup_report, GFP_KERNEL); 599 } 600 601 priv->wowlan = false; 602 603 iwlagn_prepare_restart(priv); 604 605 memset((void *)&ctx->active, 0, sizeof(ctx->active)); 606 iwl_connection_init_rx_config(priv, ctx); 607 iwlagn_set_rxon_chain(priv, ctx); 608 609 out_unlock: 610 mutex_unlock(&priv->mutex); 611 IWL_DEBUG_MAC80211(priv, "leave\n"); 612 613 ieee80211_resume_disconnect(vif); 614 615 return 1; 616} 617 618static void iwlagn_mac_set_wakeup(struct ieee80211_hw *hw, bool enabled) 619{ 620 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 621 622 device_set_wakeup_enable(priv->trans->dev, enabled); 623} 624#endif 625 626static void iwlagn_mac_tx(struct ieee80211_hw *hw, 627 struct ieee80211_tx_control *control, 628 struct sk_buff *skb) 629{ 630 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 631 632 if (iwlagn_tx_skb(priv, control->sta, skb)) 633 ieee80211_free_txskb(hw, skb); 634} 635 636static void iwlagn_mac_update_tkip_key(struct ieee80211_hw *hw, 637 struct ieee80211_vif *vif, 638 struct ieee80211_key_conf *keyconf, 639 struct ieee80211_sta *sta, 640 u32 iv32, u16 *phase1key) 641{ 642 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 643 644 iwl_update_tkip_key(priv, vif, keyconf, sta, iv32, phase1key); 645} 646 647static int iwlagn_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd, 648 struct ieee80211_vif *vif, 649 struct ieee80211_sta *sta, 650 struct ieee80211_key_conf *key) 651{ 652 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 653 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv; 654 struct iwl_rxon_context *ctx = vif_priv->ctx; 655 int ret; 656 bool is_default_wep_key = false; 657 658 IWL_DEBUG_MAC80211(priv, "enter\n"); 659 660 if (iwlwifi_mod_params.sw_crypto) { 661 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n"); 662 return -EOPNOTSUPP; 663 } 664 665 switch (key->cipher) { 666 case WLAN_CIPHER_SUITE_TKIP: 667 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC; 668 /* fall through */ 669 case WLAN_CIPHER_SUITE_CCMP: 670 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV; 671 break; 672 default: 673 break; 674 } 675 676 /* 677 * We could program these keys into the hardware as well, but we 678 * don't expect much multicast traffic in IBSS and having keys 679 * for more stations is probably more useful. 680 * 681 * Mark key TX-only and return 0. 682 */ 683 if (vif->type == NL80211_IFTYPE_ADHOC && 684 !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) { 685 key->hw_key_idx = WEP_INVALID_OFFSET; 686 return 0; 687 } 688 689 /* If they key was TX-only, accept deletion */ 690 if (cmd == DISABLE_KEY && key->hw_key_idx == WEP_INVALID_OFFSET) 691 return 0; 692 693 mutex_lock(&priv->mutex); 694 iwl_scan_cancel_timeout(priv, 100); 695 696 BUILD_BUG_ON(WEP_INVALID_OFFSET == IWLAGN_HW_KEY_DEFAULT); 697 698 /* 699 * If we are getting WEP group key and we didn't receive any key mapping 700 * so far, we are in legacy wep mode (group key only), otherwise we are 701 * in 1X mode. 702 * In legacy wep mode, we use another host command to the uCode. 703 */ 704 if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 || 705 key->cipher == WLAN_CIPHER_SUITE_WEP104) && !sta) { 706 if (cmd == SET_KEY) 707 is_default_wep_key = !ctx->key_mapping_keys; 708 else 709 is_default_wep_key = 710 key->hw_key_idx == IWLAGN_HW_KEY_DEFAULT; 711 } 712 713 714 switch (cmd) { 715 case SET_KEY: 716 if (is_default_wep_key) { 717 ret = iwl_set_default_wep_key(priv, vif_priv->ctx, key); 718 break; 719 } 720 ret = iwl_set_dynamic_key(priv, vif_priv->ctx, key, sta); 721 if (ret) { 722 /* 723 * can't add key for RX, but we don't need it 724 * in the device for TX so still return 0 725 */ 726 ret = 0; 727 key->hw_key_idx = WEP_INVALID_OFFSET; 728 } 729 730 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n"); 731 break; 732 case DISABLE_KEY: 733 if (is_default_wep_key) 734 ret = iwl_remove_default_wep_key(priv, ctx, key); 735 else 736 ret = iwl_remove_dynamic_key(priv, ctx, key, sta); 737 738 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n"); 739 break; 740 default: 741 ret = -EINVAL; 742 } 743 744 mutex_unlock(&priv->mutex); 745 IWL_DEBUG_MAC80211(priv, "leave\n"); 746 747 return ret; 748} 749 750static int iwlagn_mac_ampdu_action(struct ieee80211_hw *hw, 751 struct ieee80211_vif *vif, 752 enum ieee80211_ampdu_mlme_action action, 753 struct ieee80211_sta *sta, u16 tid, u16 *ssn, 754 u8 buf_size) 755{ 756 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 757 int ret = -EINVAL; 758 struct iwl_station_priv *sta_priv = (void *) sta->drv_priv; 759 760 IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n", 761 sta->addr, tid); 762 763 if (!(priv->nvm_data->sku_cap_11n_enable)) 764 return -EACCES; 765 766 IWL_DEBUG_MAC80211(priv, "enter\n"); 767 mutex_lock(&priv->mutex); 768 769 switch (action) { 770 case IEEE80211_AMPDU_RX_START: 771 if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG) 772 break; 773 IWL_DEBUG_HT(priv, "start Rx\n"); 774 ret = iwl_sta_rx_agg_start(priv, sta, tid, *ssn); 775 break; 776 case IEEE80211_AMPDU_RX_STOP: 777 IWL_DEBUG_HT(priv, "stop Rx\n"); 778 ret = iwl_sta_rx_agg_stop(priv, sta, tid); 779 break; 780 case IEEE80211_AMPDU_TX_START: 781 if (!priv->trans->ops->txq_enable) 782 break; 783 if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG) 784 break; 785 IWL_DEBUG_HT(priv, "start Tx\n"); 786 ret = iwlagn_tx_agg_start(priv, vif, sta, tid, ssn); 787 break; 788 case IEEE80211_AMPDU_TX_STOP_FLUSH: 789 case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT: 790 IWL_DEBUG_HT(priv, "Flush Tx\n"); 791 ret = iwlagn_tx_agg_flush(priv, vif, sta, tid); 792 break; 793 case IEEE80211_AMPDU_TX_STOP_CONT: 794 IWL_DEBUG_HT(priv, "stop Tx\n"); 795 ret = iwlagn_tx_agg_stop(priv, vif, sta, tid); 796 if ((ret == 0) && (priv->agg_tids_count > 0)) { 797 priv->agg_tids_count--; 798 IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n", 799 priv->agg_tids_count); 800 } 801 if (!priv->agg_tids_count && 802 priv->hw_params.use_rts_for_aggregation) { 803 /* 804 * switch off RTS/CTS if it was previously enabled 805 */ 806 sta_priv->lq_sta.lq.general_params.flags &= 807 ~LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK; 808 iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif), 809 &sta_priv->lq_sta.lq, CMD_ASYNC, false); 810 } 811 break; 812 case IEEE80211_AMPDU_TX_OPERATIONAL: 813 ret = iwlagn_tx_agg_oper(priv, vif, sta, tid, buf_size); 814 break; 815 } 816 mutex_unlock(&priv->mutex); 817 IWL_DEBUG_MAC80211(priv, "leave\n"); 818 return ret; 819} 820 821static int iwlagn_mac_sta_add(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 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv; 828 bool is_ap = vif->type == NL80211_IFTYPE_STATION; 829 int ret; 830 u8 sta_id; 831 832 IWL_DEBUG_INFO(priv, "proceeding to add station %pM\n", 833 sta->addr); 834 sta_priv->sta_id = IWL_INVALID_STATION; 835 836 atomic_set(&sta_priv->pending_frames, 0); 837 if (vif->type == NL80211_IFTYPE_AP) 838 sta_priv->client = true; 839 840 ret = iwl_add_station_common(priv, vif_priv->ctx, sta->addr, 841 is_ap, sta, &sta_id); 842 if (ret) { 843 IWL_ERR(priv, "Unable to add station %pM (%d)\n", 844 sta->addr, ret); 845 /* Should we return success if return code is EEXIST ? */ 846 return ret; 847 } 848 849 sta_priv->sta_id = sta_id; 850 851 return 0; 852} 853 854static int iwlagn_mac_sta_remove(struct ieee80211_hw *hw, 855 struct ieee80211_vif *vif, 856 struct ieee80211_sta *sta) 857{ 858 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 859 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv; 860 int ret; 861 862 IWL_DEBUG_INFO(priv, "proceeding to remove station %pM\n", sta->addr); 863 864 if (vif->type == NL80211_IFTYPE_STATION) { 865 /* 866 * Station will be removed from device when the RXON 867 * is set to unassociated -- just deactivate it here 868 * to avoid re-programming it. 869 */ 870 ret = 0; 871 iwl_deactivate_station(priv, sta_priv->sta_id, sta->addr); 872 } else { 873 ret = iwl_remove_station(priv, sta_priv->sta_id, sta->addr); 874 if (ret) 875 IWL_DEBUG_QUIET_RFKILL(priv, 876 "Error removing station %pM\n", sta->addr); 877 } 878 return ret; 879} 880 881static int iwlagn_mac_sta_state(struct ieee80211_hw *hw, 882 struct ieee80211_vif *vif, 883 struct ieee80211_sta *sta, 884 enum ieee80211_sta_state old_state, 885 enum ieee80211_sta_state new_state) 886{ 887 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 888 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv; 889 enum { 890 NONE, ADD, REMOVE, HT_RATE_INIT, ADD_RATE_INIT, 891 } op = NONE; 892 int ret; 893 894 IWL_DEBUG_MAC80211(priv, "station %pM state change %d->%d\n", 895 sta->addr, old_state, new_state); 896 897 mutex_lock(&priv->mutex); 898 if (vif->type == NL80211_IFTYPE_STATION) { 899 if (old_state == IEEE80211_STA_NOTEXIST && 900 new_state == IEEE80211_STA_NONE) 901 op = ADD; 902 else if (old_state == IEEE80211_STA_NONE && 903 new_state == IEEE80211_STA_NOTEXIST) 904 op = REMOVE; 905 else if (old_state == IEEE80211_STA_AUTH && 906 new_state == IEEE80211_STA_ASSOC) 907 op = HT_RATE_INIT; 908 } else { 909 if (old_state == IEEE80211_STA_AUTH && 910 new_state == IEEE80211_STA_ASSOC) 911 op = ADD_RATE_INIT; 912 else if (old_state == IEEE80211_STA_ASSOC && 913 new_state == IEEE80211_STA_AUTH) 914 op = REMOVE; 915 } 916 917 switch (op) { 918 case ADD: 919 ret = iwlagn_mac_sta_add(hw, vif, sta); 920 if (ret) 921 break; 922 /* 923 * Clear the in-progress flag, the AP station entry was added 924 * but we'll initialize LQ only when we've associated (which 925 * would also clear the in-progress flag). This is necessary 926 * in case we never initialize LQ because association fails. 927 */ 928 spin_lock_bh(&priv->sta_lock); 929 priv->stations[iwl_sta_id(sta)].used &= 930 ~IWL_STA_UCODE_INPROGRESS; 931 spin_unlock_bh(&priv->sta_lock); 932 break; 933 case REMOVE: 934 ret = iwlagn_mac_sta_remove(hw, vif, sta); 935 break; 936 case ADD_RATE_INIT: 937 ret = iwlagn_mac_sta_add(hw, vif, sta); 938 if (ret) 939 break; 940 /* Initialize rate scaling */ 941 IWL_DEBUG_INFO(priv, 942 "Initializing rate scaling for station %pM\n", 943 sta->addr); 944 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta)); 945 ret = 0; 946 break; 947 case HT_RATE_INIT: 948 /* Initialize rate scaling */ 949 ret = iwl_sta_update_ht(priv, vif_priv->ctx, sta); 950 if (ret) 951 break; 952 IWL_DEBUG_INFO(priv, 953 "Initializing rate scaling for station %pM\n", 954 sta->addr); 955 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta)); 956 ret = 0; 957 break; 958 default: 959 ret = 0; 960 break; 961 } 962 963 /* 964 * mac80211 might WARN if we fail, but due the way we 965 * (badly) handle hard rfkill, we might fail here 966 */ 967 if (iwl_is_rfkill(priv)) 968 ret = 0; 969 970 mutex_unlock(&priv->mutex); 971 IWL_DEBUG_MAC80211(priv, "leave\n"); 972 973 return ret; 974} 975 976static void iwlagn_mac_channel_switch(struct ieee80211_hw *hw, 977 struct ieee80211_channel_switch *ch_switch) 978{ 979 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 980 struct ieee80211_conf *conf = &hw->conf; 981 struct ieee80211_channel *channel = ch_switch->chandef.chan; 982 struct iwl_ht_config *ht_conf = &priv->current_ht_config; 983 /* 984 * MULTI-FIXME 985 * When we add support for multiple interfaces, we need to 986 * revisit this. The channel switch command in the device 987 * only affects the BSS context, but what does that really 988 * mean? And what if we get a CSA on the second interface? 989 * This needs a lot of work. 990 */ 991 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS]; 992 u16 ch; 993 994 IWL_DEBUG_MAC80211(priv, "enter\n"); 995 996 mutex_lock(&priv->mutex); 997 998 if (iwl_is_rfkill(priv)) 999 goto out; 1000 1001 if (test_bit(STATUS_EXIT_PENDING, &priv->status) || 1002 test_bit(STATUS_SCANNING, &priv->status) || 1003 test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status)) 1004 goto out; 1005 1006 if (!iwl_is_associated_ctx(ctx)) 1007 goto out; 1008 1009 if (!priv->lib->set_channel_switch) 1010 goto out; 1011 1012 ch = channel->hw_value; 1013 if (le16_to_cpu(ctx->active.channel) == ch) 1014 goto out; 1015 1016 priv->current_ht_config.smps = conf->smps_mode; 1017 1018 /* Configure HT40 channels */ 1019 switch (cfg80211_get_chandef_type(&ch_switch->chandef)) { 1020 case NL80211_CHAN_NO_HT: 1021 case NL80211_CHAN_HT20: 1022 ctx->ht.is_40mhz = false; 1023 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE; 1024 break; 1025 case NL80211_CHAN_HT40MINUS: 1026 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_BELOW; 1027 ctx->ht.is_40mhz = true; 1028 break; 1029 case NL80211_CHAN_HT40PLUS: 1030 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_ABOVE; 1031 ctx->ht.is_40mhz = true; 1032 break; 1033 } 1034 1035 if ((le16_to_cpu(ctx->staging.channel) != ch)) 1036 ctx->staging.flags = 0; 1037 1038 iwl_set_rxon_channel(priv, channel, ctx); 1039 iwl_set_rxon_ht(priv, ht_conf); 1040 iwl_set_flags_for_band(priv, ctx, channel->band, ctx->vif); 1041 1042 /* 1043 * at this point, staging_rxon has the 1044 * configuration for channel switch 1045 */ 1046 set_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status); 1047 priv->switch_channel = cpu_to_le16(ch); 1048 if (priv->lib->set_channel_switch(priv, ch_switch)) { 1049 clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status); 1050 priv->switch_channel = 0; 1051 ieee80211_chswitch_done(ctx->vif, false); 1052 } 1053 1054out: 1055 mutex_unlock(&priv->mutex); 1056 IWL_DEBUG_MAC80211(priv, "leave\n"); 1057} 1058 1059void iwl_chswitch_done(struct iwl_priv *priv, bool is_success) 1060{ 1061 /* 1062 * MULTI-FIXME 1063 * See iwlagn_mac_channel_switch. 1064 */ 1065 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS]; 1066 1067 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) 1068 return; 1069 1070 if (test_and_clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status)) 1071 ieee80211_chswitch_done(ctx->vif, is_success); 1072} 1073 1074static void iwlagn_configure_filter(struct ieee80211_hw *hw, 1075 unsigned int changed_flags, 1076 unsigned int *total_flags, 1077 u64 multicast) 1078{ 1079 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1080 __le32 filter_or = 0, filter_nand = 0; 1081 struct iwl_rxon_context *ctx; 1082 1083#define CHK(test, flag) do { \ 1084 if (*total_flags & (test)) \ 1085 filter_or |= (flag); \ 1086 else \ 1087 filter_nand |= (flag); \ 1088 } while (0) 1089 1090 IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n", 1091 changed_flags, *total_flags); 1092 1093 CHK(FIF_OTHER_BSS | FIF_PROMISC_IN_BSS, RXON_FILTER_PROMISC_MSK); 1094 /* Setting _just_ RXON_FILTER_CTL2HOST_MSK causes FH errors */ 1095 CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_PROMISC_MSK); 1096 CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK); 1097 1098#undef CHK 1099 1100 mutex_lock(&priv->mutex); 1101 1102 for_each_context(priv, ctx) { 1103 ctx->staging.filter_flags &= ~filter_nand; 1104 ctx->staging.filter_flags |= filter_or; 1105 1106 /* 1107 * Not committing directly because hardware can perform a scan, 1108 * but we'll eventually commit the filter flags change anyway. 1109 */ 1110 } 1111 1112 mutex_unlock(&priv->mutex); 1113 1114 /* 1115 * Receiving all multicast frames is always enabled by the 1116 * default flags setup in iwl_connection_init_rx_config() 1117 * since we currently do not support programming multicast 1118 * filters into the device. 1119 */ 1120 *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | FIF_PROMISC_IN_BSS | 1121 FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL; 1122} 1123 1124static void iwlagn_mac_flush(struct ieee80211_hw *hw, u32 queues, bool drop) 1125{ 1126 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1127 1128 mutex_lock(&priv->mutex); 1129 IWL_DEBUG_MAC80211(priv, "enter\n"); 1130 1131 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) { 1132 IWL_DEBUG_TX(priv, "Aborting flush due to device shutdown\n"); 1133 goto done; 1134 } 1135 if (iwl_is_rfkill(priv)) { 1136 IWL_DEBUG_TX(priv, "Aborting flush due to RF Kill\n"); 1137 goto done; 1138 } 1139 1140 /* 1141 * mac80211 will not push any more frames for transmit 1142 * until the flush is completed 1143 */ 1144 if (drop) { 1145 IWL_DEBUG_MAC80211(priv, "send flush command\n"); 1146 if (iwlagn_txfifo_flush(priv, 0)) { 1147 IWL_ERR(priv, "flush request fail\n"); 1148 goto done; 1149 } 1150 } 1151 IWL_DEBUG_MAC80211(priv, "wait transmit/flush all frames\n"); 1152 iwl_trans_wait_tx_queue_empty(priv->trans); 1153done: 1154 mutex_unlock(&priv->mutex); 1155 IWL_DEBUG_MAC80211(priv, "leave\n"); 1156} 1157 1158static int iwlagn_mac_remain_on_channel(struct ieee80211_hw *hw, 1159 struct ieee80211_vif *vif, 1160 struct ieee80211_channel *channel, 1161 int duration, 1162 enum ieee80211_roc_type type) 1163{ 1164 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1165 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_PAN]; 1166 int err = 0; 1167 1168 if (!(priv->valid_contexts & BIT(IWL_RXON_CTX_PAN))) 1169 return -EOPNOTSUPP; 1170 1171 if (!(ctx->interface_modes & BIT(NL80211_IFTYPE_P2P_CLIENT))) 1172 return -EOPNOTSUPP; 1173 1174 IWL_DEBUG_MAC80211(priv, "enter\n"); 1175 mutex_lock(&priv->mutex); 1176 1177 if (test_bit(STATUS_SCAN_HW, &priv->status)) { 1178 /* mac80211 should not scan while ROC or ROC while scanning */ 1179 if (WARN_ON_ONCE(priv->scan_type != IWL_SCAN_RADIO_RESET)) { 1180 err = -EBUSY; 1181 goto out; 1182 } 1183 1184 iwl_scan_cancel_timeout(priv, 100); 1185 1186 if (test_bit(STATUS_SCAN_HW, &priv->status)) { 1187 err = -EBUSY; 1188 goto out; 1189 } 1190 } 1191 1192 priv->hw_roc_channel = channel; 1193 /* convert from ms to TU */ 1194 priv->hw_roc_duration = DIV_ROUND_UP(1000 * duration, 1024); 1195 priv->hw_roc_start_notified = false; 1196 cancel_delayed_work(&priv->hw_roc_disable_work); 1197 1198 if (!ctx->is_active) { 1199 static const struct iwl_qos_info default_qos_data = { 1200 .def_qos_parm = { 1201 .ac[0] = { 1202 .cw_min = cpu_to_le16(3), 1203 .cw_max = cpu_to_le16(7), 1204 .aifsn = 2, 1205 .edca_txop = cpu_to_le16(1504), 1206 }, 1207 .ac[1] = { 1208 .cw_min = cpu_to_le16(7), 1209 .cw_max = cpu_to_le16(15), 1210 .aifsn = 2, 1211 .edca_txop = cpu_to_le16(3008), 1212 }, 1213 .ac[2] = { 1214 .cw_min = cpu_to_le16(15), 1215 .cw_max = cpu_to_le16(1023), 1216 .aifsn = 3, 1217 }, 1218 .ac[3] = { 1219 .cw_min = cpu_to_le16(15), 1220 .cw_max = cpu_to_le16(1023), 1221 .aifsn = 7, 1222 }, 1223 }, 1224 }; 1225 1226 ctx->is_active = true; 1227 ctx->qos_data = default_qos_data; 1228 ctx->staging.dev_type = RXON_DEV_TYPE_P2P; 1229 memcpy(ctx->staging.node_addr, 1230 priv->contexts[IWL_RXON_CTX_BSS].staging.node_addr, 1231 ETH_ALEN); 1232 memcpy(ctx->staging.bssid_addr, 1233 priv->contexts[IWL_RXON_CTX_BSS].staging.node_addr, 1234 ETH_ALEN); 1235 err = iwlagn_commit_rxon(priv, ctx); 1236 if (err) 1237 goto out; 1238 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK | 1239 RXON_FILTER_PROMISC_MSK | 1240 RXON_FILTER_CTL2HOST_MSK; 1241 1242 err = iwlagn_commit_rxon(priv, ctx); 1243 if (err) { 1244 iwlagn_disable_roc(priv); 1245 goto out; 1246 } 1247 priv->hw_roc_setup = true; 1248 } 1249 1250 err = iwl_scan_initiate(priv, ctx->vif, IWL_SCAN_ROC, channel->band); 1251 if (err) 1252 iwlagn_disable_roc(priv); 1253 1254 out: 1255 mutex_unlock(&priv->mutex); 1256 IWL_DEBUG_MAC80211(priv, "leave\n"); 1257 1258 return err; 1259} 1260 1261static int iwlagn_mac_cancel_remain_on_channel(struct ieee80211_hw *hw) 1262{ 1263 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1264 1265 if (!(priv->valid_contexts & BIT(IWL_RXON_CTX_PAN))) 1266 return -EOPNOTSUPP; 1267 1268 IWL_DEBUG_MAC80211(priv, "enter\n"); 1269 mutex_lock(&priv->mutex); 1270 iwl_scan_cancel_timeout(priv, priv->hw_roc_duration); 1271 iwlagn_disable_roc(priv); 1272 mutex_unlock(&priv->mutex); 1273 IWL_DEBUG_MAC80211(priv, "leave\n"); 1274 1275 return 0; 1276} 1277 1278static void iwlagn_mac_rssi_callback(struct ieee80211_hw *hw, 1279 struct ieee80211_vif *vif, 1280 enum ieee80211_rssi_event rssi_event) 1281{ 1282 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1283 1284 IWL_DEBUG_MAC80211(priv, "enter\n"); 1285 mutex_lock(&priv->mutex); 1286 1287 if (priv->lib->bt_params && 1288 priv->lib->bt_params->advanced_bt_coexist) { 1289 if (rssi_event == RSSI_EVENT_LOW) 1290 priv->bt_enable_pspoll = true; 1291 else if (rssi_event == RSSI_EVENT_HIGH) 1292 priv->bt_enable_pspoll = false; 1293 1294 iwlagn_send_advance_bt_config(priv); 1295 } else { 1296 IWL_DEBUG_MAC80211(priv, "Advanced BT coex disabled," 1297 "ignoring RSSI callback\n"); 1298 } 1299 1300 mutex_unlock(&priv->mutex); 1301 IWL_DEBUG_MAC80211(priv, "leave\n"); 1302} 1303 1304static int iwlagn_mac_set_tim(struct ieee80211_hw *hw, 1305 struct ieee80211_sta *sta, bool set) 1306{ 1307 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1308 1309 queue_work(priv->workqueue, &priv->beacon_update); 1310 1311 return 0; 1312} 1313 1314static int iwlagn_mac_conf_tx(struct ieee80211_hw *hw, 1315 struct ieee80211_vif *vif, u16 queue, 1316 const struct ieee80211_tx_queue_params *params) 1317{ 1318 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1319 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv; 1320 struct iwl_rxon_context *ctx = vif_priv->ctx; 1321 int q; 1322 1323 if (WARN_ON(!ctx)) 1324 return -EINVAL; 1325 1326 IWL_DEBUG_MAC80211(priv, "enter\n"); 1327 1328 if (!iwl_is_ready_rf(priv)) { 1329 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n"); 1330 return -EIO; 1331 } 1332 1333 if (queue >= AC_NUM) { 1334 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue); 1335 return 0; 1336 } 1337 1338 q = AC_NUM - 1 - queue; 1339 1340 mutex_lock(&priv->mutex); 1341 1342 ctx->qos_data.def_qos_parm.ac[q].cw_min = 1343 cpu_to_le16(params->cw_min); 1344 ctx->qos_data.def_qos_parm.ac[q].cw_max = 1345 cpu_to_le16(params->cw_max); 1346 ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs; 1347 ctx->qos_data.def_qos_parm.ac[q].edca_txop = 1348 cpu_to_le16((params->txop * 32)); 1349 1350 ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0; 1351 1352 mutex_unlock(&priv->mutex); 1353 1354 IWL_DEBUG_MAC80211(priv, "leave\n"); 1355 return 0; 1356} 1357 1358static int iwlagn_mac_tx_last_beacon(struct ieee80211_hw *hw) 1359{ 1360 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1361 1362 return priv->ibss_manager == IWL_IBSS_MANAGER; 1363} 1364 1365static int iwl_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx) 1366{ 1367 iwl_connection_init_rx_config(priv, ctx); 1368 1369 iwlagn_set_rxon_chain(priv, ctx); 1370 1371 return iwlagn_commit_rxon(priv, ctx); 1372} 1373 1374static int iwl_setup_interface(struct iwl_priv *priv, 1375 struct iwl_rxon_context *ctx) 1376{ 1377 struct ieee80211_vif *vif = ctx->vif; 1378 int err, ac; 1379 1380 lockdep_assert_held(&priv->mutex); 1381 1382 /* 1383 * This variable will be correct only when there's just 1384 * a single context, but all code using it is for hardware 1385 * that supports only one context. 1386 */ 1387 priv->iw_mode = vif->type; 1388 1389 ctx->is_active = true; 1390 1391 err = iwl_set_mode(priv, ctx); 1392 if (err) { 1393 if (!ctx->always_active) 1394 ctx->is_active = false; 1395 return err; 1396 } 1397 1398 if (priv->lib->bt_params && priv->lib->bt_params->advanced_bt_coexist && 1399 vif->type == NL80211_IFTYPE_ADHOC) { 1400 /* 1401 * pretend to have high BT traffic as long as we 1402 * are operating in IBSS mode, as this will cause 1403 * the rate scaling etc. to behave as intended. 1404 */ 1405 priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH; 1406 } 1407 1408 /* set up queue mappings */ 1409 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 1410 vif->hw_queue[ac] = ctx->ac_to_queue[ac]; 1411 1412 if (vif->type == NL80211_IFTYPE_AP) 1413 vif->cab_queue = ctx->mcast_queue; 1414 else 1415 vif->cab_queue = IEEE80211_INVAL_HW_QUEUE; 1416 1417 return 0; 1418} 1419 1420static int iwlagn_mac_add_interface(struct ieee80211_hw *hw, 1421 struct ieee80211_vif *vif) 1422{ 1423 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1424 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv; 1425 struct iwl_rxon_context *tmp, *ctx = NULL; 1426 int err; 1427 enum nl80211_iftype viftype = ieee80211_vif_type_p2p(vif); 1428 bool reset = false; 1429 1430 IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n", 1431 viftype, vif->addr); 1432 1433 cancel_delayed_work_sync(&priv->hw_roc_disable_work); 1434 1435 mutex_lock(&priv->mutex); 1436 1437 iwlagn_disable_roc(priv); 1438 1439 if (!iwl_is_ready_rf(priv)) { 1440 IWL_WARN(priv, "Try to add interface when device not ready\n"); 1441 err = -EINVAL; 1442 goto out; 1443 } 1444 1445 for_each_context(priv, tmp) { 1446 u32 possible_modes = 1447 tmp->interface_modes | tmp->exclusive_interface_modes; 1448 1449 if (tmp->vif) { 1450 /* On reset we need to add the same interface again */ 1451 if (tmp->vif == vif) { 1452 reset = true; 1453 ctx = tmp; 1454 break; 1455 } 1456 1457 /* check if this busy context is exclusive */ 1458 if (tmp->exclusive_interface_modes & 1459 BIT(tmp->vif->type)) { 1460 err = -EINVAL; 1461 goto out; 1462 } 1463 continue; 1464 } 1465 1466 if (!(possible_modes & BIT(viftype))) 1467 continue; 1468 1469 /* have maybe usable context w/o interface */ 1470 ctx = tmp; 1471 break; 1472 } 1473 1474 if (!ctx) { 1475 err = -EOPNOTSUPP; 1476 goto out; 1477 } 1478 1479 vif_priv->ctx = ctx; 1480 ctx->vif = vif; 1481 1482 /* 1483 * In SNIFFER device type, the firmware reports the FCS to 1484 * the host, rather than snipping it off. Unfortunately, 1485 * mac80211 doesn't (yet) provide a per-packet flag for 1486 * this, so that we have to set the hardware flag based 1487 * on the interfaces added. As the monitor interface can 1488 * only be present by itself, and will be removed before 1489 * other interfaces are added, this is safe. 1490 */ 1491 if (vif->type == NL80211_IFTYPE_MONITOR) 1492 priv->hw->flags |= IEEE80211_HW_RX_INCLUDES_FCS; 1493 else 1494 priv->hw->flags &= ~IEEE80211_HW_RX_INCLUDES_FCS; 1495 1496 err = iwl_setup_interface(priv, ctx); 1497 if (!err || reset) 1498 goto out; 1499 1500 ctx->vif = NULL; 1501 priv->iw_mode = NL80211_IFTYPE_STATION; 1502 out: 1503 mutex_unlock(&priv->mutex); 1504 1505 IWL_DEBUG_MAC80211(priv, "leave\n"); 1506 return err; 1507} 1508 1509static void iwl_teardown_interface(struct iwl_priv *priv, 1510 struct ieee80211_vif *vif, 1511 bool mode_change) 1512{ 1513 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif); 1514 1515 lockdep_assert_held(&priv->mutex); 1516 1517 if (priv->scan_vif == vif) { 1518 iwl_scan_cancel_timeout(priv, 200); 1519 iwl_force_scan_end(priv); 1520 } 1521 1522 if (!mode_change) { 1523 iwl_set_mode(priv, ctx); 1524 if (!ctx->always_active) 1525 ctx->is_active = false; 1526 } 1527 1528 /* 1529 * When removing the IBSS interface, overwrite the 1530 * BT traffic load with the stored one from the last 1531 * notification, if any. If this is a device that 1532 * doesn't implement this, this has no effect since 1533 * both values are the same and zero. 1534 */ 1535 if (vif->type == NL80211_IFTYPE_ADHOC) 1536 priv->bt_traffic_load = priv->last_bt_traffic_load; 1537} 1538 1539static void iwlagn_mac_remove_interface(struct ieee80211_hw *hw, 1540 struct ieee80211_vif *vif) 1541{ 1542 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1543 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif); 1544 1545 IWL_DEBUG_MAC80211(priv, "enter\n"); 1546 1547 mutex_lock(&priv->mutex); 1548 1549 if (WARN_ON(ctx->vif != vif)) { 1550 struct iwl_rxon_context *tmp; 1551 IWL_ERR(priv, "ctx->vif = %p, vif = %p\n", ctx->vif, vif); 1552 for_each_context(priv, tmp) 1553 IWL_ERR(priv, "\tID = %d:\tctx = %p\tctx->vif = %p\n", 1554 tmp->ctxid, tmp, tmp->vif); 1555 } 1556 ctx->vif = NULL; 1557 1558 iwl_teardown_interface(priv, vif, false); 1559 1560 mutex_unlock(&priv->mutex); 1561 1562 IWL_DEBUG_MAC80211(priv, "leave\n"); 1563 1564} 1565 1566static int iwlagn_mac_change_interface(struct ieee80211_hw *hw, 1567 struct ieee80211_vif *vif, 1568 enum nl80211_iftype newtype, bool newp2p) 1569{ 1570 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1571 struct iwl_rxon_context *ctx, *tmp; 1572 enum nl80211_iftype newviftype = newtype; 1573 u32 interface_modes; 1574 int err; 1575 1576 IWL_DEBUG_MAC80211(priv, "enter\n"); 1577 1578 newtype = ieee80211_iftype_p2p(newtype, newp2p); 1579 1580 mutex_lock(&priv->mutex); 1581 1582 ctx = iwl_rxon_ctx_from_vif(vif); 1583 1584 /* 1585 * To simplify this code, only support changes on the 1586 * BSS context. The PAN context is usually reassigned 1587 * by creating/removing P2P interfaces anyway. 1588 */ 1589 if (ctx->ctxid != IWL_RXON_CTX_BSS) { 1590 err = -EBUSY; 1591 goto out; 1592 } 1593 1594 if (!ctx->vif || !iwl_is_ready_rf(priv)) { 1595 /* 1596 * Huh? But wait ... this can maybe happen when 1597 * we're in the middle of a firmware restart! 1598 */ 1599 err = -EBUSY; 1600 goto out; 1601 } 1602 1603 /* Check if the switch is supported in the same context */ 1604 interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes; 1605 if (!(interface_modes & BIT(newtype))) { 1606 err = -EBUSY; 1607 goto out; 1608 } 1609 1610 if (ctx->exclusive_interface_modes & BIT(newtype)) { 1611 for_each_context(priv, tmp) { 1612 if (ctx == tmp) 1613 continue; 1614 1615 if (!tmp->is_active) 1616 continue; 1617 1618 /* 1619 * The current mode switch would be exclusive, but 1620 * another context is active ... refuse the switch. 1621 */ 1622 err = -EBUSY; 1623 goto out; 1624 } 1625 } 1626 1627 /* success */ 1628 iwl_teardown_interface(priv, vif, true); 1629 vif->type = newviftype; 1630 vif->p2p = newp2p; 1631 err = iwl_setup_interface(priv, ctx); 1632 WARN_ON(err); 1633 /* 1634 * We've switched internally, but submitting to the 1635 * device may have failed for some reason. Mask this 1636 * error, because otherwise mac80211 will not switch 1637 * (and set the interface type back) and we'll be 1638 * out of sync with it. 1639 */ 1640 err = 0; 1641 1642 out: 1643 mutex_unlock(&priv->mutex); 1644 IWL_DEBUG_MAC80211(priv, "leave\n"); 1645 1646 return err; 1647} 1648 1649static int iwlagn_mac_hw_scan(struct ieee80211_hw *hw, 1650 struct ieee80211_vif *vif, 1651 struct cfg80211_scan_request *req) 1652{ 1653 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1654 int ret; 1655 1656 IWL_DEBUG_MAC80211(priv, "enter\n"); 1657 1658 if (req->n_channels == 0) 1659 return -EINVAL; 1660 1661 mutex_lock(&priv->mutex); 1662 1663 /* 1664 * If an internal scan is in progress, just set 1665 * up the scan_request as per above. 1666 */ 1667 if (priv->scan_type != IWL_SCAN_NORMAL) { 1668 IWL_DEBUG_SCAN(priv, 1669 "SCAN request during internal scan - defer\n"); 1670 priv->scan_request = req; 1671 priv->scan_vif = vif; 1672 ret = 0; 1673 } else { 1674 priv->scan_request = req; 1675 priv->scan_vif = vif; 1676 /* 1677 * mac80211 will only ask for one band at a time 1678 * so using channels[0] here is ok 1679 */ 1680 ret = iwl_scan_initiate(priv, vif, IWL_SCAN_NORMAL, 1681 req->channels[0]->band); 1682 if (ret) { 1683 priv->scan_request = NULL; 1684 priv->scan_vif = NULL; 1685 } 1686 } 1687 1688 IWL_DEBUG_MAC80211(priv, "leave\n"); 1689 1690 mutex_unlock(&priv->mutex); 1691 1692 return ret; 1693} 1694 1695static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id) 1696{ 1697 struct iwl_addsta_cmd cmd = { 1698 .mode = STA_CONTROL_MODIFY_MSK, 1699 .station_flags_msk = STA_FLG_PWR_SAVE_MSK, 1700 .sta.sta_id = sta_id, 1701 }; 1702 1703 iwl_send_add_sta(priv, &cmd, CMD_ASYNC); 1704} 1705 1706static void iwlagn_mac_sta_notify(struct ieee80211_hw *hw, 1707 struct ieee80211_vif *vif, 1708 enum sta_notify_cmd cmd, 1709 struct ieee80211_sta *sta) 1710{ 1711 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1712 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv; 1713 int sta_id; 1714 1715 IWL_DEBUG_MAC80211(priv, "enter\n"); 1716 1717 switch (cmd) { 1718 case STA_NOTIFY_SLEEP: 1719 WARN_ON(!sta_priv->client); 1720 sta_priv->asleep = true; 1721 if (atomic_read(&sta_priv->pending_frames) > 0) 1722 ieee80211_sta_block_awake(hw, sta, true); 1723 break; 1724 case STA_NOTIFY_AWAKE: 1725 WARN_ON(!sta_priv->client); 1726 if (!sta_priv->asleep) 1727 break; 1728 sta_priv->asleep = false; 1729 sta_id = iwl_sta_id(sta); 1730 if (sta_id != IWL_INVALID_STATION) 1731 iwl_sta_modify_ps_wake(priv, sta_id); 1732 break; 1733 default: 1734 break; 1735 } 1736 IWL_DEBUG_MAC80211(priv, "leave\n"); 1737} 1738 1739struct ieee80211_ops iwlagn_hw_ops = { 1740 .tx = iwlagn_mac_tx, 1741 .start = iwlagn_mac_start, 1742 .stop = iwlagn_mac_stop, 1743#ifdef CONFIG_PM_SLEEP 1744 .suspend = iwlagn_mac_suspend, 1745 .resume = iwlagn_mac_resume, 1746 .set_wakeup = iwlagn_mac_set_wakeup, 1747#endif 1748 .add_interface = iwlagn_mac_add_interface, 1749 .remove_interface = iwlagn_mac_remove_interface, 1750 .change_interface = iwlagn_mac_change_interface, 1751 .config = iwlagn_mac_config, 1752 .configure_filter = iwlagn_configure_filter, 1753 .set_key = iwlagn_mac_set_key, 1754 .update_tkip_key = iwlagn_mac_update_tkip_key, 1755 .set_rekey_data = iwlagn_mac_set_rekey_data, 1756 .conf_tx = iwlagn_mac_conf_tx, 1757 .bss_info_changed = iwlagn_bss_info_changed, 1758 .ampdu_action = iwlagn_mac_ampdu_action, 1759 .hw_scan = iwlagn_mac_hw_scan, 1760 .sta_notify = iwlagn_mac_sta_notify, 1761 .sta_state = iwlagn_mac_sta_state, 1762 .channel_switch = iwlagn_mac_channel_switch, 1763 .flush = iwlagn_mac_flush, 1764 .tx_last_beacon = iwlagn_mac_tx_last_beacon, 1765 .remain_on_channel = iwlagn_mac_remain_on_channel, 1766 .cancel_remain_on_channel = iwlagn_mac_cancel_remain_on_channel, 1767 .rssi_callback = iwlagn_mac_rssi_callback, 1768 .set_tim = iwlagn_mac_set_tim, 1769}; 1770 1771/* This function both allocates and initializes hw and priv. */ 1772struct ieee80211_hw *iwl_alloc_all(void) 1773{ 1774 struct iwl_priv *priv; 1775 struct iwl_op_mode *op_mode; 1776 /* mac80211 allocates memory for this device instance, including 1777 * space for this driver's private structure */ 1778 struct ieee80211_hw *hw; 1779 1780 hw = ieee80211_alloc_hw(sizeof(struct iwl_priv) + 1781 sizeof(struct iwl_op_mode), &iwlagn_hw_ops); 1782 if (!hw) 1783 goto out; 1784 1785 op_mode = hw->priv; 1786 priv = IWL_OP_MODE_GET_DVM(op_mode); 1787 priv->hw = hw; 1788 1789out: 1790 return hw; 1791} 1792