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 <linuxwifi@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 60 static 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 71 static const struct ieee80211_iface_limit iwlagn_2sta_limits[] = { 72 { 73 .max = 2, 74 .types = BIT(NL80211_IFTYPE_STATION), 75 }, 76 }; 77 78 static const struct ieee80211_iface_combination 79 iwlagn_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 */ 97 int 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 ieee80211_hw_set(hw, SIGNAL_DBM); 108 ieee80211_hw_set(hw, AMPDU_AGGREGATION); 109 ieee80211_hw_set(hw, NEED_DTIM_BEFORE_ASSOC); 110 ieee80211_hw_set(hw, SPECTRUM_MGMT); 111 ieee80211_hw_set(hw, REPORTS_TX_ACK_STATUS); 112 ieee80211_hw_set(hw, QUEUE_CONTROL); 113 ieee80211_hw_set(hw, SUPPORTS_PS); 114 ieee80211_hw_set(hw, SUPPORTS_DYNAMIC_PS); 115 ieee80211_hw_set(hw, SUPPORT_FAST_XMIT); 116 ieee80211_hw_set(hw, WANT_MONITOR_VIF); 117 118 if (priv->trans->max_skb_frags) 119 hw->netdev_features = NETIF_F_HIGHDMA | NETIF_F_SG; 120 121 hw->offchannel_tx_hw_queue = IWL_AUX_QUEUE; 122 hw->radiotap_mcs_details |= IEEE80211_RADIOTAP_MCS_HAVE_FMT; 123 124 /* 125 * Including the following line will crash some AP's. This 126 * workaround removes the stimulus which causes the crash until 127 * the AP software can be fixed. 128 hw->max_tx_aggregation_subframes = LINK_QUAL_AGG_FRAME_LIMIT_DEF; 129 */ 130 131 if (priv->nvm_data->sku_cap_11n_enable) 132 hw->wiphy->features |= NL80211_FEATURE_DYNAMIC_SMPS | 133 NL80211_FEATURE_STATIC_SMPS; 134 135 /* 136 * Enable 11w if advertised by firmware and software crypto 137 * is not enabled (as the firmware will interpret some mgmt 138 * packets, so enabling it with software crypto isn't safe) 139 */ 140 if (priv->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_MFP && 141 !iwlwifi_mod_params.sw_crypto) 142 ieee80211_hw_set(hw, MFP_CAPABLE); 143 144 hw->sta_data_size = sizeof(struct iwl_station_priv); 145 hw->vif_data_size = sizeof(struct iwl_vif_priv); 146 147 for_each_context(priv, ctx) { 148 hw->wiphy->interface_modes |= ctx->interface_modes; 149 hw->wiphy->interface_modes |= ctx->exclusive_interface_modes; 150 } 151 152 BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2); 153 154 if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) { 155 hw->wiphy->iface_combinations = 156 iwlagn_iface_combinations_dualmode; 157 hw->wiphy->n_iface_combinations = 158 ARRAY_SIZE(iwlagn_iface_combinations_dualmode); 159 } 160 161 hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN; 162 hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG | 163 REGULATORY_DISABLE_BEACON_HINTS; 164 165 #ifdef CONFIG_PM_SLEEP 166 if (priv->fw->img[IWL_UCODE_WOWLAN].sec[0].len && 167 priv->trans->ops->d3_suspend && 168 priv->trans->ops->d3_resume && 169 device_can_wakeup(priv->trans->dev)) { 170 priv->wowlan_support.flags = WIPHY_WOWLAN_MAGIC_PKT | 171 WIPHY_WOWLAN_DISCONNECT | 172 WIPHY_WOWLAN_EAP_IDENTITY_REQ | 173 WIPHY_WOWLAN_RFKILL_RELEASE; 174 if (!iwlwifi_mod_params.sw_crypto) 175 priv->wowlan_support.flags |= 176 WIPHY_WOWLAN_SUPPORTS_GTK_REKEY | 177 WIPHY_WOWLAN_GTK_REKEY_FAILURE; 178 179 priv->wowlan_support.n_patterns = IWLAGN_WOWLAN_MAX_PATTERNS; 180 priv->wowlan_support.pattern_min_len = 181 IWLAGN_WOWLAN_MIN_PATTERN_LEN; 182 priv->wowlan_support.pattern_max_len = 183 IWLAGN_WOWLAN_MAX_PATTERN_LEN; 184 hw->wiphy->wowlan = &priv->wowlan_support; 185 } 186 #endif 187 188 if (iwlwifi_mod_params.power_save) 189 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT; 190 else 191 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT; 192 193 hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX; 194 /* we create the 802.11 header and a max-length SSID element */ 195 hw->wiphy->max_scan_ie_len = capa->max_probe_length - 24 - 34; 196 197 /* 198 * We don't use all queues: 4 and 9 are unused and any 199 * aggregation queue gets mapped down to the AC queue. 200 */ 201 hw->queues = IWLAGN_FIRST_AMPDU_QUEUE; 202 203 hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL; 204 205 if (priv->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels) 206 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = 207 &priv->nvm_data->bands[IEEE80211_BAND_2GHZ]; 208 if (priv->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels) 209 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] = 210 &priv->nvm_data->bands[IEEE80211_BAND_5GHZ]; 211 212 hw->wiphy->hw_version = priv->trans->hw_id; 213 214 iwl_leds_init(priv); 215 216 ret = ieee80211_register_hw(priv->hw); 217 if (ret) { 218 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret); 219 iwl_leds_exit(priv); 220 return ret; 221 } 222 priv->mac80211_registered = 1; 223 224 return 0; 225 } 226 227 void iwlagn_mac_unregister(struct iwl_priv *priv) 228 { 229 if (!priv->mac80211_registered) 230 return; 231 iwl_leds_exit(priv); 232 ieee80211_unregister_hw(priv->hw); 233 priv->mac80211_registered = 0; 234 } 235 236 static int __iwl_up(struct iwl_priv *priv) 237 { 238 struct iwl_rxon_context *ctx; 239 int ret; 240 241 lockdep_assert_held(&priv->mutex); 242 243 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) { 244 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n"); 245 return -EIO; 246 } 247 248 for_each_context(priv, ctx) { 249 ret = iwlagn_alloc_bcast_station(priv, ctx); 250 if (ret) { 251 iwl_dealloc_bcast_stations(priv); 252 return ret; 253 } 254 } 255 256 ret = iwl_trans_start_hw(priv->trans); 257 if (ret) { 258 IWL_ERR(priv, "Failed to start HW: %d\n", ret); 259 goto error; 260 } 261 262 ret = iwl_run_init_ucode(priv); 263 if (ret) { 264 IWL_ERR(priv, "Failed to run INIT ucode: %d\n", ret); 265 goto error; 266 } 267 268 ret = iwl_trans_start_hw(priv->trans); 269 if (ret) { 270 IWL_ERR(priv, "Failed to start HW: %d\n", ret); 271 goto error; 272 } 273 274 ret = iwl_load_ucode_wait_alive(priv, IWL_UCODE_REGULAR); 275 if (ret) { 276 IWL_ERR(priv, "Failed to start RT ucode: %d\n", ret); 277 goto error; 278 } 279 280 ret = iwl_alive_start(priv); 281 if (ret) 282 goto error; 283 return 0; 284 285 error: 286 set_bit(STATUS_EXIT_PENDING, &priv->status); 287 iwl_down(priv); 288 clear_bit(STATUS_EXIT_PENDING, &priv->status); 289 290 IWL_ERR(priv, "Unable to initialize device.\n"); 291 return ret; 292 } 293 294 static int iwlagn_mac_start(struct ieee80211_hw *hw) 295 { 296 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 297 int ret; 298 299 IWL_DEBUG_MAC80211(priv, "enter\n"); 300 301 /* we should be verifying the device is ready to be opened */ 302 mutex_lock(&priv->mutex); 303 ret = __iwl_up(priv); 304 mutex_unlock(&priv->mutex); 305 if (ret) 306 return ret; 307 308 IWL_DEBUG_INFO(priv, "Start UP work done.\n"); 309 310 /* Now we should be done, and the READY bit should be set. */ 311 if (WARN_ON(!test_bit(STATUS_READY, &priv->status))) 312 ret = -EIO; 313 314 iwlagn_led_enable(priv); 315 316 priv->is_open = 1; 317 IWL_DEBUG_MAC80211(priv, "leave\n"); 318 return 0; 319 } 320 321 static void iwlagn_mac_stop(struct ieee80211_hw *hw) 322 { 323 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 324 325 IWL_DEBUG_MAC80211(priv, "enter\n"); 326 327 if (!priv->is_open) 328 return; 329 330 priv->is_open = 0; 331 332 mutex_lock(&priv->mutex); 333 iwl_down(priv); 334 mutex_unlock(&priv->mutex); 335 336 iwl_cancel_deferred_work(priv); 337 338 flush_workqueue(priv->workqueue); 339 340 IWL_DEBUG_MAC80211(priv, "leave\n"); 341 } 342 343 static void iwlagn_mac_set_rekey_data(struct ieee80211_hw *hw, 344 struct ieee80211_vif *vif, 345 struct cfg80211_gtk_rekey_data *data) 346 { 347 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 348 349 if (iwlwifi_mod_params.sw_crypto) 350 return; 351 352 IWL_DEBUG_MAC80211(priv, "enter\n"); 353 mutex_lock(&priv->mutex); 354 355 if (priv->contexts[IWL_RXON_CTX_BSS].vif != vif) 356 goto out; 357 358 memcpy(priv->kek, data->kek, NL80211_KEK_LEN); 359 memcpy(priv->kck, data->kck, NL80211_KCK_LEN); 360 priv->replay_ctr = 361 cpu_to_le64(be64_to_cpup((__be64 *)&data->replay_ctr)); 362 priv->have_rekey_data = true; 363 364 out: 365 mutex_unlock(&priv->mutex); 366 IWL_DEBUG_MAC80211(priv, "leave\n"); 367 } 368 369 #ifdef CONFIG_PM_SLEEP 370 371 static int iwlagn_mac_suspend(struct ieee80211_hw *hw, 372 struct cfg80211_wowlan *wowlan) 373 { 374 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 375 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS]; 376 int ret; 377 378 if (WARN_ON(!wowlan)) 379 return -EINVAL; 380 381 IWL_DEBUG_MAC80211(priv, "enter\n"); 382 mutex_lock(&priv->mutex); 383 384 /* Don't attempt WoWLAN when not associated, tear down instead. */ 385 if (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION || 386 !iwl_is_associated_ctx(ctx)) { 387 ret = 1; 388 goto out; 389 } 390 391 ret = iwlagn_suspend(priv, wowlan); 392 if (ret) 393 goto error; 394 395 /* let the ucode operate on its own */ 396 iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_SET, 397 CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE); 398 399 iwl_trans_d3_suspend(priv->trans, false); 400 401 goto out; 402 403 error: 404 priv->wowlan = false; 405 iwlagn_prepare_restart(priv); 406 ieee80211_restart_hw(priv->hw); 407 out: 408 mutex_unlock(&priv->mutex); 409 IWL_DEBUG_MAC80211(priv, "leave\n"); 410 411 return ret; 412 } 413 414 struct iwl_resume_data { 415 struct iwl_priv *priv; 416 struct iwlagn_wowlan_status *cmd; 417 bool valid; 418 }; 419 420 static bool iwl_resume_status_fn(struct iwl_notif_wait_data *notif_wait, 421 struct iwl_rx_packet *pkt, void *data) 422 { 423 struct iwl_resume_data *resume_data = data; 424 struct iwl_priv *priv = resume_data->priv; 425 426 if (iwl_rx_packet_payload_len(pkt) != sizeof(*resume_data->cmd)) { 427 IWL_ERR(priv, "rx wrong size data\n"); 428 return true; 429 } 430 memcpy(resume_data->cmd, pkt->data, sizeof(*resume_data->cmd)); 431 resume_data->valid = true; 432 433 return true; 434 } 435 436 static int iwlagn_mac_resume(struct ieee80211_hw *hw) 437 { 438 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 439 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS]; 440 struct ieee80211_vif *vif; 441 u32 base; 442 int ret; 443 enum iwl_d3_status d3_status; 444 struct error_table_start { 445 /* cf. struct iwl_error_event_table */ 446 u32 valid; 447 u32 error_id; 448 } err_info; 449 struct iwl_notification_wait status_wait; 450 static const u16 status_cmd[] = { 451 REPLY_WOWLAN_GET_STATUS, 452 }; 453 struct iwlagn_wowlan_status status_data = {}; 454 struct iwl_resume_data resume_data = { 455 .priv = priv, 456 .cmd = &status_data, 457 .valid = false, 458 }; 459 struct cfg80211_wowlan_wakeup wakeup = { 460 .pattern_idx = -1, 461 }; 462 #ifdef CONFIG_IWLWIFI_DEBUGFS 463 const struct fw_img *img; 464 #endif 465 466 IWL_DEBUG_MAC80211(priv, "enter\n"); 467 mutex_lock(&priv->mutex); 468 469 /* we'll clear ctx->vif during iwlagn_prepare_restart() */ 470 vif = ctx->vif; 471 472 ret = iwl_trans_d3_resume(priv->trans, &d3_status, false); 473 if (ret) 474 goto out_unlock; 475 476 if (d3_status != IWL_D3_STATUS_ALIVE) { 477 IWL_INFO(priv, "Device was reset during suspend\n"); 478 goto out_unlock; 479 } 480 481 /* uCode is no longer operating by itself */ 482 iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_CLR, 483 CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE); 484 485 base = priv->device_pointers.error_event_table; 486 if (!iwlagn_hw_valid_rtc_data_addr(base)) { 487 IWL_WARN(priv, "Invalid error table during resume!\n"); 488 goto out_unlock; 489 } 490 491 iwl_trans_read_mem_bytes(priv->trans, base, 492 &err_info, sizeof(err_info)); 493 494 if (err_info.valid) { 495 IWL_INFO(priv, "error table is valid (%d, 0x%x)\n", 496 err_info.valid, err_info.error_id); 497 if (err_info.error_id == RF_KILL_INDICATOR_FOR_WOWLAN) { 498 wakeup.rfkill_release = true; 499 ieee80211_report_wowlan_wakeup(vif, &wakeup, 500 GFP_KERNEL); 501 } 502 goto out_unlock; 503 } 504 505 #ifdef CONFIG_IWLWIFI_DEBUGFS 506 img = &priv->fw->img[IWL_UCODE_WOWLAN]; 507 if (!priv->wowlan_sram) 508 priv->wowlan_sram = 509 kzalloc(img->sec[IWL_UCODE_SECTION_DATA].len, 510 GFP_KERNEL); 511 512 if (priv->wowlan_sram) 513 iwl_trans_read_mem(priv->trans, 0x800000, 514 priv->wowlan_sram, 515 img->sec[IWL_UCODE_SECTION_DATA].len / 4); 516 #endif 517 518 /* 519 * This is very strange. The GET_STATUS command is sent but the device 520 * doesn't reply properly, it seems it doesn't close the RBD so one is 521 * always left open ... As a result, we need to send another command 522 * and have to reset the driver afterwards. As we need to switch to 523 * runtime firmware again that'll happen. 524 */ 525 526 iwl_init_notification_wait(&priv->notif_wait, &status_wait, status_cmd, 527 ARRAY_SIZE(status_cmd), iwl_resume_status_fn, 528 &resume_data); 529 530 iwl_dvm_send_cmd_pdu(priv, REPLY_WOWLAN_GET_STATUS, CMD_ASYNC, 0, NULL); 531 iwl_dvm_send_cmd_pdu(priv, REPLY_ECHO, CMD_ASYNC, 0, NULL); 532 /* an RBD is left open in the firmware now! */ 533 534 ret = iwl_wait_notification(&priv->notif_wait, &status_wait, HZ/5); 535 if (ret) 536 goto out_unlock; 537 538 if (resume_data.valid && priv->contexts[IWL_RXON_CTX_BSS].vif) { 539 u32 reasons = le32_to_cpu(status_data.wakeup_reason); 540 struct cfg80211_wowlan_wakeup *wakeup_report; 541 542 IWL_INFO(priv, "WoWLAN wakeup reason(s): 0x%.8x\n", reasons); 543 544 if (reasons) { 545 if (reasons & IWLAGN_WOWLAN_WAKEUP_MAGIC_PACKET) 546 wakeup.magic_pkt = true; 547 if (reasons & IWLAGN_WOWLAN_WAKEUP_PATTERN_MATCH) 548 wakeup.pattern_idx = status_data.pattern_number; 549 if (reasons & (IWLAGN_WOWLAN_WAKEUP_BEACON_MISS | 550 IWLAGN_WOWLAN_WAKEUP_LINK_CHANGE)) 551 wakeup.disconnect = true; 552 if (reasons & IWLAGN_WOWLAN_WAKEUP_GTK_REKEY_FAIL) 553 wakeup.gtk_rekey_failure = true; 554 if (reasons & IWLAGN_WOWLAN_WAKEUP_EAP_IDENT_REQ) 555 wakeup.eap_identity_req = true; 556 if (reasons & IWLAGN_WOWLAN_WAKEUP_4WAY_HANDSHAKE) 557 wakeup.four_way_handshake = true; 558 wakeup_report = &wakeup; 559 } else { 560 wakeup_report = NULL; 561 } 562 563 ieee80211_report_wowlan_wakeup(vif, wakeup_report, GFP_KERNEL); 564 } 565 566 priv->wowlan = false; 567 568 iwlagn_prepare_restart(priv); 569 570 memset((void *)&ctx->active, 0, sizeof(ctx->active)); 571 iwl_connection_init_rx_config(priv, ctx); 572 iwlagn_set_rxon_chain(priv, ctx); 573 574 out_unlock: 575 mutex_unlock(&priv->mutex); 576 IWL_DEBUG_MAC80211(priv, "leave\n"); 577 578 ieee80211_resume_disconnect(vif); 579 580 return 1; 581 } 582 583 static void iwlagn_mac_set_wakeup(struct ieee80211_hw *hw, bool enabled) 584 { 585 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 586 587 device_set_wakeup_enable(priv->trans->dev, enabled); 588 } 589 #endif 590 591 static void iwlagn_mac_tx(struct ieee80211_hw *hw, 592 struct ieee80211_tx_control *control, 593 struct sk_buff *skb) 594 { 595 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 596 597 if (iwlagn_tx_skb(priv, control->sta, skb)) 598 ieee80211_free_txskb(hw, skb); 599 } 600 601 static void iwlagn_mac_update_tkip_key(struct ieee80211_hw *hw, 602 struct ieee80211_vif *vif, 603 struct ieee80211_key_conf *keyconf, 604 struct ieee80211_sta *sta, 605 u32 iv32, u16 *phase1key) 606 { 607 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 608 609 iwl_update_tkip_key(priv, vif, keyconf, sta, iv32, phase1key); 610 } 611 612 static int iwlagn_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd, 613 struct ieee80211_vif *vif, 614 struct ieee80211_sta *sta, 615 struct ieee80211_key_conf *key) 616 { 617 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 618 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv; 619 struct iwl_rxon_context *ctx = vif_priv->ctx; 620 int ret; 621 bool is_default_wep_key = false; 622 623 IWL_DEBUG_MAC80211(priv, "enter\n"); 624 625 if (iwlwifi_mod_params.sw_crypto) { 626 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n"); 627 return -EOPNOTSUPP; 628 } 629 630 switch (key->cipher) { 631 case WLAN_CIPHER_SUITE_TKIP: 632 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC; 633 /* fall through */ 634 case WLAN_CIPHER_SUITE_CCMP: 635 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV; 636 break; 637 default: 638 break; 639 } 640 641 /* 642 * We could program these keys into the hardware as well, but we 643 * don't expect much multicast traffic in IBSS and having keys 644 * for more stations is probably more useful. 645 * 646 * Mark key TX-only and return 0. 647 */ 648 if (vif->type == NL80211_IFTYPE_ADHOC && 649 !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) { 650 key->hw_key_idx = WEP_INVALID_OFFSET; 651 return 0; 652 } 653 654 /* If they key was TX-only, accept deletion */ 655 if (cmd == DISABLE_KEY && key->hw_key_idx == WEP_INVALID_OFFSET) 656 return 0; 657 658 mutex_lock(&priv->mutex); 659 iwl_scan_cancel_timeout(priv, 100); 660 661 BUILD_BUG_ON(WEP_INVALID_OFFSET == IWLAGN_HW_KEY_DEFAULT); 662 663 /* 664 * If we are getting WEP group key and we didn't receive any key mapping 665 * so far, we are in legacy wep mode (group key only), otherwise we are 666 * in 1X mode. 667 * In legacy wep mode, we use another host command to the uCode. 668 */ 669 if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 || 670 key->cipher == WLAN_CIPHER_SUITE_WEP104) && !sta) { 671 if (cmd == SET_KEY) 672 is_default_wep_key = !ctx->key_mapping_keys; 673 else 674 is_default_wep_key = 675 key->hw_key_idx == IWLAGN_HW_KEY_DEFAULT; 676 } 677 678 679 switch (cmd) { 680 case SET_KEY: 681 if (is_default_wep_key) { 682 ret = iwl_set_default_wep_key(priv, vif_priv->ctx, key); 683 break; 684 } 685 ret = iwl_set_dynamic_key(priv, vif_priv->ctx, key, sta); 686 if (ret) { 687 /* 688 * can't add key for RX, but we don't need it 689 * in the device for TX so still return 0 690 */ 691 ret = 0; 692 key->hw_key_idx = WEP_INVALID_OFFSET; 693 } 694 695 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n"); 696 break; 697 case DISABLE_KEY: 698 if (is_default_wep_key) 699 ret = iwl_remove_default_wep_key(priv, ctx, key); 700 else 701 ret = iwl_remove_dynamic_key(priv, ctx, key, sta); 702 703 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n"); 704 break; 705 default: 706 ret = -EINVAL; 707 } 708 709 mutex_unlock(&priv->mutex); 710 IWL_DEBUG_MAC80211(priv, "leave\n"); 711 712 return ret; 713 } 714 715 static inline bool iwl_enable_rx_ampdu(const struct iwl_cfg *cfg) 716 { 717 if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG) 718 return false; 719 return true; 720 } 721 722 static inline bool iwl_enable_tx_ampdu(const struct iwl_cfg *cfg) 723 { 724 if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG) 725 return false; 726 if (iwlwifi_mod_params.disable_11n & IWL_ENABLE_HT_TXAGG) 727 return true; 728 729 /* disabled by default */ 730 return false; 731 } 732 733 static int iwlagn_mac_ampdu_action(struct ieee80211_hw *hw, 734 struct ieee80211_vif *vif, 735 enum ieee80211_ampdu_mlme_action action, 736 struct ieee80211_sta *sta, u16 tid, u16 *ssn, 737 u8 buf_size, bool amsdu) 738 { 739 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 740 int ret = -EINVAL; 741 struct iwl_station_priv *sta_priv = (void *) sta->drv_priv; 742 743 IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n", 744 sta->addr, tid); 745 746 if (!(priv->nvm_data->sku_cap_11n_enable)) 747 return -EACCES; 748 749 IWL_DEBUG_MAC80211(priv, "enter\n"); 750 mutex_lock(&priv->mutex); 751 752 switch (action) { 753 case IEEE80211_AMPDU_RX_START: 754 if (!iwl_enable_rx_ampdu(priv->cfg)) 755 break; 756 IWL_DEBUG_HT(priv, "start Rx\n"); 757 ret = iwl_sta_rx_agg_start(priv, sta, tid, *ssn); 758 break; 759 case IEEE80211_AMPDU_RX_STOP: 760 IWL_DEBUG_HT(priv, "stop Rx\n"); 761 ret = iwl_sta_rx_agg_stop(priv, sta, tid); 762 break; 763 case IEEE80211_AMPDU_TX_START: 764 if (!priv->trans->ops->txq_enable) 765 break; 766 if (!iwl_enable_tx_ampdu(priv->cfg)) 767 break; 768 IWL_DEBUG_HT(priv, "start Tx\n"); 769 ret = iwlagn_tx_agg_start(priv, vif, sta, tid, ssn); 770 break; 771 case IEEE80211_AMPDU_TX_STOP_FLUSH: 772 case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT: 773 IWL_DEBUG_HT(priv, "Flush Tx\n"); 774 ret = iwlagn_tx_agg_flush(priv, vif, sta, tid); 775 break; 776 case IEEE80211_AMPDU_TX_STOP_CONT: 777 IWL_DEBUG_HT(priv, "stop Tx\n"); 778 ret = iwlagn_tx_agg_stop(priv, vif, sta, tid); 779 if ((ret == 0) && (priv->agg_tids_count > 0)) { 780 priv->agg_tids_count--; 781 IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n", 782 priv->agg_tids_count); 783 } 784 if (!priv->agg_tids_count && 785 priv->hw_params.use_rts_for_aggregation) { 786 /* 787 * switch off RTS/CTS if it was previously enabled 788 */ 789 sta_priv->lq_sta.lq.general_params.flags &= 790 ~LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK; 791 iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif), 792 &sta_priv->lq_sta.lq, CMD_ASYNC, false); 793 } 794 break; 795 case IEEE80211_AMPDU_TX_OPERATIONAL: 796 ret = iwlagn_tx_agg_oper(priv, vif, sta, tid, buf_size); 797 break; 798 } 799 mutex_unlock(&priv->mutex); 800 IWL_DEBUG_MAC80211(priv, "leave\n"); 801 return ret; 802 } 803 804 static int iwlagn_mac_sta_add(struct ieee80211_hw *hw, 805 struct ieee80211_vif *vif, 806 struct ieee80211_sta *sta) 807 { 808 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 809 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv; 810 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv; 811 bool is_ap = vif->type == NL80211_IFTYPE_STATION; 812 int ret; 813 u8 sta_id; 814 815 IWL_DEBUG_INFO(priv, "proceeding to add station %pM\n", 816 sta->addr); 817 sta_priv->sta_id = IWL_INVALID_STATION; 818 819 atomic_set(&sta_priv->pending_frames, 0); 820 if (vif->type == NL80211_IFTYPE_AP) 821 sta_priv->client = true; 822 823 ret = iwl_add_station_common(priv, vif_priv->ctx, sta->addr, 824 is_ap, sta, &sta_id); 825 if (ret) { 826 IWL_ERR(priv, "Unable to add station %pM (%d)\n", 827 sta->addr, ret); 828 /* Should we return success if return code is EEXIST ? */ 829 return ret; 830 } 831 832 sta_priv->sta_id = sta_id; 833 834 return 0; 835 } 836 837 static int iwlagn_mac_sta_remove(struct ieee80211_hw *hw, 838 struct ieee80211_vif *vif, 839 struct ieee80211_sta *sta) 840 { 841 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 842 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv; 843 int ret; 844 845 IWL_DEBUG_INFO(priv, "proceeding to remove station %pM\n", sta->addr); 846 847 if (vif->type == NL80211_IFTYPE_STATION) { 848 /* 849 * Station will be removed from device when the RXON 850 * is set to unassociated -- just deactivate it here 851 * to avoid re-programming it. 852 */ 853 ret = 0; 854 iwl_deactivate_station(priv, sta_priv->sta_id, sta->addr); 855 } else { 856 ret = iwl_remove_station(priv, sta_priv->sta_id, sta->addr); 857 if (ret) 858 IWL_DEBUG_QUIET_RFKILL(priv, 859 "Error removing station %pM\n", sta->addr); 860 } 861 return ret; 862 } 863 864 static int iwlagn_mac_sta_state(struct ieee80211_hw *hw, 865 struct ieee80211_vif *vif, 866 struct ieee80211_sta *sta, 867 enum ieee80211_sta_state old_state, 868 enum ieee80211_sta_state new_state) 869 { 870 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 871 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv; 872 enum { 873 NONE, ADD, REMOVE, HT_RATE_INIT, ADD_RATE_INIT, 874 } op = NONE; 875 int ret; 876 877 IWL_DEBUG_MAC80211(priv, "station %pM state change %d->%d\n", 878 sta->addr, old_state, new_state); 879 880 mutex_lock(&priv->mutex); 881 if (vif->type == NL80211_IFTYPE_STATION) { 882 if (old_state == IEEE80211_STA_NOTEXIST && 883 new_state == IEEE80211_STA_NONE) 884 op = ADD; 885 else if (old_state == IEEE80211_STA_NONE && 886 new_state == IEEE80211_STA_NOTEXIST) 887 op = REMOVE; 888 else if (old_state == IEEE80211_STA_AUTH && 889 new_state == IEEE80211_STA_ASSOC) 890 op = HT_RATE_INIT; 891 } else { 892 if (old_state == IEEE80211_STA_AUTH && 893 new_state == IEEE80211_STA_ASSOC) 894 op = ADD_RATE_INIT; 895 else if (old_state == IEEE80211_STA_ASSOC && 896 new_state == IEEE80211_STA_AUTH) 897 op = REMOVE; 898 } 899 900 switch (op) { 901 case ADD: 902 ret = iwlagn_mac_sta_add(hw, vif, sta); 903 if (ret) 904 break; 905 /* 906 * Clear the in-progress flag, the AP station entry was added 907 * but we'll initialize LQ only when we've associated (which 908 * would also clear the in-progress flag). This is necessary 909 * in case we never initialize LQ because association fails. 910 */ 911 spin_lock_bh(&priv->sta_lock); 912 priv->stations[iwl_sta_id(sta)].used &= 913 ~IWL_STA_UCODE_INPROGRESS; 914 spin_unlock_bh(&priv->sta_lock); 915 break; 916 case REMOVE: 917 ret = iwlagn_mac_sta_remove(hw, vif, sta); 918 break; 919 case ADD_RATE_INIT: 920 ret = iwlagn_mac_sta_add(hw, vif, sta); 921 if (ret) 922 break; 923 /* Initialize rate scaling */ 924 IWL_DEBUG_INFO(priv, 925 "Initializing rate scaling for station %pM\n", 926 sta->addr); 927 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta)); 928 ret = 0; 929 break; 930 case HT_RATE_INIT: 931 /* Initialize rate scaling */ 932 ret = iwl_sta_update_ht(priv, vif_priv->ctx, sta); 933 if (ret) 934 break; 935 IWL_DEBUG_INFO(priv, 936 "Initializing rate scaling for station %pM\n", 937 sta->addr); 938 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta)); 939 ret = 0; 940 break; 941 default: 942 ret = 0; 943 break; 944 } 945 946 /* 947 * mac80211 might WARN if we fail, but due the way we 948 * (badly) handle hard rfkill, we might fail here 949 */ 950 if (iwl_is_rfkill(priv)) 951 ret = 0; 952 953 mutex_unlock(&priv->mutex); 954 IWL_DEBUG_MAC80211(priv, "leave\n"); 955 956 return ret; 957 } 958 959 static void iwlagn_mac_channel_switch(struct ieee80211_hw *hw, 960 struct ieee80211_vif *vif, 961 struct ieee80211_channel_switch *ch_switch) 962 { 963 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 964 struct ieee80211_conf *conf = &hw->conf; 965 struct ieee80211_channel *channel = ch_switch->chandef.chan; 966 struct iwl_ht_config *ht_conf = &priv->current_ht_config; 967 /* 968 * MULTI-FIXME 969 * When we add support for multiple interfaces, we need to 970 * revisit this. The channel switch command in the device 971 * only affects the BSS context, but what does that really 972 * mean? And what if we get a CSA on the second interface? 973 * This needs a lot of work. 974 */ 975 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS]; 976 u16 ch; 977 978 IWL_DEBUG_MAC80211(priv, "enter\n"); 979 980 mutex_lock(&priv->mutex); 981 982 if (iwl_is_rfkill(priv)) 983 goto out; 984 985 if (test_bit(STATUS_EXIT_PENDING, &priv->status) || 986 test_bit(STATUS_SCANNING, &priv->status) || 987 test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status)) 988 goto out; 989 990 if (!iwl_is_associated_ctx(ctx)) 991 goto out; 992 993 if (!priv->lib->set_channel_switch) 994 goto out; 995 996 ch = channel->hw_value; 997 if (le16_to_cpu(ctx->active.channel) == ch) 998 goto out; 999 1000 priv->current_ht_config.smps = conf->smps_mode; 1001 1002 /* Configure HT40 channels */ 1003 switch (cfg80211_get_chandef_type(&ch_switch->chandef)) { 1004 case NL80211_CHAN_NO_HT: 1005 case NL80211_CHAN_HT20: 1006 ctx->ht.is_40mhz = false; 1007 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE; 1008 break; 1009 case NL80211_CHAN_HT40MINUS: 1010 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_BELOW; 1011 ctx->ht.is_40mhz = true; 1012 break; 1013 case NL80211_CHAN_HT40PLUS: 1014 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_ABOVE; 1015 ctx->ht.is_40mhz = true; 1016 break; 1017 } 1018 1019 if ((le16_to_cpu(ctx->staging.channel) != ch)) 1020 ctx->staging.flags = 0; 1021 1022 iwl_set_rxon_channel(priv, channel, ctx); 1023 iwl_set_rxon_ht(priv, ht_conf); 1024 iwl_set_flags_for_band(priv, ctx, channel->band, ctx->vif); 1025 1026 /* 1027 * at this point, staging_rxon has the 1028 * configuration for channel switch 1029 */ 1030 set_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status); 1031 priv->switch_channel = cpu_to_le16(ch); 1032 if (priv->lib->set_channel_switch(priv, ch_switch)) { 1033 clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status); 1034 priv->switch_channel = 0; 1035 ieee80211_chswitch_done(ctx->vif, false); 1036 } 1037 1038 out: 1039 mutex_unlock(&priv->mutex); 1040 IWL_DEBUG_MAC80211(priv, "leave\n"); 1041 } 1042 1043 void iwl_chswitch_done(struct iwl_priv *priv, bool is_success) 1044 { 1045 /* 1046 * MULTI-FIXME 1047 * See iwlagn_mac_channel_switch. 1048 */ 1049 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS]; 1050 1051 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) 1052 return; 1053 1054 if (!test_and_clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status)) 1055 return; 1056 1057 if (ctx->vif) 1058 ieee80211_chswitch_done(ctx->vif, is_success); 1059 } 1060 1061 static void iwlagn_configure_filter(struct ieee80211_hw *hw, 1062 unsigned int changed_flags, 1063 unsigned int *total_flags, 1064 u64 multicast) 1065 { 1066 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1067 __le32 filter_or = 0, filter_nand = 0; 1068 struct iwl_rxon_context *ctx; 1069 1070 #define CHK(test, flag) do { \ 1071 if (*total_flags & (test)) \ 1072 filter_or |= (flag); \ 1073 else \ 1074 filter_nand |= (flag); \ 1075 } while (0) 1076 1077 IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n", 1078 changed_flags, *total_flags); 1079 1080 CHK(FIF_OTHER_BSS, RXON_FILTER_PROMISC_MSK); 1081 /* Setting _just_ RXON_FILTER_CTL2HOST_MSK causes FH errors */ 1082 CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_PROMISC_MSK); 1083 CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK); 1084 1085 #undef CHK 1086 1087 mutex_lock(&priv->mutex); 1088 1089 for_each_context(priv, ctx) { 1090 ctx->staging.filter_flags &= ~filter_nand; 1091 ctx->staging.filter_flags |= filter_or; 1092 1093 /* 1094 * Not committing directly because hardware can perform a scan, 1095 * but we'll eventually commit the filter flags change anyway. 1096 */ 1097 } 1098 1099 mutex_unlock(&priv->mutex); 1100 1101 /* 1102 * Receiving all multicast frames is always enabled by the 1103 * default flags setup in iwl_connection_init_rx_config() 1104 * since we currently do not support programming multicast 1105 * filters into the device. 1106 */ 1107 *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | 1108 FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL; 1109 } 1110 1111 static void iwlagn_mac_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 1112 u32 queues, bool drop) 1113 { 1114 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1115 u32 scd_queues; 1116 1117 mutex_lock(&priv->mutex); 1118 IWL_DEBUG_MAC80211(priv, "enter\n"); 1119 1120 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) { 1121 IWL_DEBUG_TX(priv, "Aborting flush due to device shutdown\n"); 1122 goto done; 1123 } 1124 if (iwl_is_rfkill(priv)) { 1125 IWL_DEBUG_TX(priv, "Aborting flush due to RF Kill\n"); 1126 goto done; 1127 } 1128 1129 scd_queues = BIT(priv->cfg->base_params->num_of_queues) - 1; 1130 scd_queues &= ~(BIT(IWL_IPAN_CMD_QUEUE_NUM) | 1131 BIT(IWL_DEFAULT_CMD_QUEUE_NUM)); 1132 1133 if (drop) { 1134 IWL_DEBUG_TX_QUEUES(priv, "Flushing SCD queues: 0x%x\n", 1135 scd_queues); 1136 if (iwlagn_txfifo_flush(priv, scd_queues)) { 1137 IWL_ERR(priv, "flush request fail\n"); 1138 goto done; 1139 } 1140 } 1141 1142 IWL_DEBUG_TX_QUEUES(priv, "wait transmit/flush all frames\n"); 1143 iwl_trans_wait_tx_queue_empty(priv->trans, scd_queues); 1144 done: 1145 mutex_unlock(&priv->mutex); 1146 IWL_DEBUG_MAC80211(priv, "leave\n"); 1147 } 1148 1149 static void iwlagn_mac_event_callback(struct ieee80211_hw *hw, 1150 struct ieee80211_vif *vif, 1151 const struct ieee80211_event *event) 1152 { 1153 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1154 1155 if (event->type != RSSI_EVENT) 1156 return; 1157 1158 IWL_DEBUG_MAC80211(priv, "enter\n"); 1159 1160 if (priv->lib->bt_params && 1161 priv->lib->bt_params->advanced_bt_coexist) { 1162 if (event->u.rssi.data == RSSI_EVENT_LOW) 1163 priv->bt_enable_pspoll = true; 1164 else if (event->u.rssi.data == RSSI_EVENT_HIGH) 1165 priv->bt_enable_pspoll = false; 1166 1167 queue_work(priv->workqueue, &priv->bt_runtime_config); 1168 } else { 1169 IWL_DEBUG_MAC80211(priv, "Advanced BT coex disabled," 1170 "ignoring RSSI callback\n"); 1171 } 1172 1173 IWL_DEBUG_MAC80211(priv, "leave\n"); 1174 } 1175 1176 static int iwlagn_mac_set_tim(struct ieee80211_hw *hw, 1177 struct ieee80211_sta *sta, bool set) 1178 { 1179 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1180 1181 queue_work(priv->workqueue, &priv->beacon_update); 1182 1183 return 0; 1184 } 1185 1186 static int iwlagn_mac_conf_tx(struct ieee80211_hw *hw, 1187 struct ieee80211_vif *vif, u16 queue, 1188 const struct ieee80211_tx_queue_params *params) 1189 { 1190 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1191 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv; 1192 struct iwl_rxon_context *ctx = vif_priv->ctx; 1193 int q; 1194 1195 if (WARN_ON(!ctx)) 1196 return -EINVAL; 1197 1198 IWL_DEBUG_MAC80211(priv, "enter\n"); 1199 1200 if (!iwl_is_ready_rf(priv)) { 1201 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n"); 1202 return -EIO; 1203 } 1204 1205 if (queue >= AC_NUM) { 1206 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue); 1207 return 0; 1208 } 1209 1210 q = AC_NUM - 1 - queue; 1211 1212 mutex_lock(&priv->mutex); 1213 1214 ctx->qos_data.def_qos_parm.ac[q].cw_min = 1215 cpu_to_le16(params->cw_min); 1216 ctx->qos_data.def_qos_parm.ac[q].cw_max = 1217 cpu_to_le16(params->cw_max); 1218 ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs; 1219 ctx->qos_data.def_qos_parm.ac[q].edca_txop = 1220 cpu_to_le16((params->txop * 32)); 1221 1222 ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0; 1223 1224 mutex_unlock(&priv->mutex); 1225 1226 IWL_DEBUG_MAC80211(priv, "leave\n"); 1227 return 0; 1228 } 1229 1230 static int iwlagn_mac_tx_last_beacon(struct ieee80211_hw *hw) 1231 { 1232 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1233 1234 return priv->ibss_manager == IWL_IBSS_MANAGER; 1235 } 1236 1237 static int iwl_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx) 1238 { 1239 iwl_connection_init_rx_config(priv, ctx); 1240 1241 iwlagn_set_rxon_chain(priv, ctx); 1242 1243 return iwlagn_commit_rxon(priv, ctx); 1244 } 1245 1246 static int iwl_setup_interface(struct iwl_priv *priv, 1247 struct iwl_rxon_context *ctx) 1248 { 1249 struct ieee80211_vif *vif = ctx->vif; 1250 int err, ac; 1251 1252 lockdep_assert_held(&priv->mutex); 1253 1254 /* 1255 * This variable will be correct only when there's just 1256 * a single context, but all code using it is for hardware 1257 * that supports only one context. 1258 */ 1259 priv->iw_mode = vif->type; 1260 1261 ctx->is_active = true; 1262 1263 err = iwl_set_mode(priv, ctx); 1264 if (err) { 1265 if (!ctx->always_active) 1266 ctx->is_active = false; 1267 return err; 1268 } 1269 1270 if (priv->lib->bt_params && priv->lib->bt_params->advanced_bt_coexist && 1271 vif->type == NL80211_IFTYPE_ADHOC) { 1272 /* 1273 * pretend to have high BT traffic as long as we 1274 * are operating in IBSS mode, as this will cause 1275 * the rate scaling etc. to behave as intended. 1276 */ 1277 priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH; 1278 } 1279 1280 /* set up queue mappings */ 1281 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 1282 vif->hw_queue[ac] = ctx->ac_to_queue[ac]; 1283 1284 if (vif->type == NL80211_IFTYPE_AP) 1285 vif->cab_queue = ctx->mcast_queue; 1286 else 1287 vif->cab_queue = IEEE80211_INVAL_HW_QUEUE; 1288 1289 return 0; 1290 } 1291 1292 static int iwlagn_mac_add_interface(struct ieee80211_hw *hw, 1293 struct ieee80211_vif *vif) 1294 { 1295 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1296 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv; 1297 struct iwl_rxon_context *tmp, *ctx = NULL; 1298 int err; 1299 enum nl80211_iftype viftype = ieee80211_vif_type_p2p(vif); 1300 bool reset = false; 1301 1302 IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n", 1303 viftype, vif->addr); 1304 1305 mutex_lock(&priv->mutex); 1306 1307 if (!iwl_is_ready_rf(priv)) { 1308 IWL_WARN(priv, "Try to add interface when device not ready\n"); 1309 err = -EINVAL; 1310 goto out; 1311 } 1312 1313 for_each_context(priv, tmp) { 1314 u32 possible_modes = 1315 tmp->interface_modes | tmp->exclusive_interface_modes; 1316 1317 if (tmp->vif) { 1318 /* On reset we need to add the same interface again */ 1319 if (tmp->vif == vif) { 1320 reset = true; 1321 ctx = tmp; 1322 break; 1323 } 1324 1325 /* check if this busy context is exclusive */ 1326 if (tmp->exclusive_interface_modes & 1327 BIT(tmp->vif->type)) { 1328 err = -EINVAL; 1329 goto out; 1330 } 1331 continue; 1332 } 1333 1334 if (!(possible_modes & BIT(viftype))) 1335 continue; 1336 1337 /* have maybe usable context w/o interface */ 1338 ctx = tmp; 1339 break; 1340 } 1341 1342 if (!ctx) { 1343 err = -EOPNOTSUPP; 1344 goto out; 1345 } 1346 1347 vif_priv->ctx = ctx; 1348 ctx->vif = vif; 1349 1350 /* 1351 * In SNIFFER device type, the firmware reports the FCS to 1352 * the host, rather than snipping it off. Unfortunately, 1353 * mac80211 doesn't (yet) provide a per-packet flag for 1354 * this, so that we have to set the hardware flag based 1355 * on the interfaces added. As the monitor interface can 1356 * only be present by itself, and will be removed before 1357 * other interfaces are added, this is safe. 1358 */ 1359 if (vif->type == NL80211_IFTYPE_MONITOR) 1360 ieee80211_hw_set(priv->hw, RX_INCLUDES_FCS); 1361 else 1362 __clear_bit(IEEE80211_HW_RX_INCLUDES_FCS, priv->hw->flags); 1363 1364 err = iwl_setup_interface(priv, ctx); 1365 if (!err || reset) 1366 goto out; 1367 1368 ctx->vif = NULL; 1369 priv->iw_mode = NL80211_IFTYPE_STATION; 1370 out: 1371 mutex_unlock(&priv->mutex); 1372 1373 IWL_DEBUG_MAC80211(priv, "leave\n"); 1374 return err; 1375 } 1376 1377 static void iwl_teardown_interface(struct iwl_priv *priv, 1378 struct ieee80211_vif *vif, 1379 bool mode_change) 1380 { 1381 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif); 1382 1383 lockdep_assert_held(&priv->mutex); 1384 1385 if (priv->scan_vif == vif) { 1386 iwl_scan_cancel_timeout(priv, 200); 1387 iwl_force_scan_end(priv); 1388 } 1389 1390 if (!mode_change) { 1391 iwl_set_mode(priv, ctx); 1392 if (!ctx->always_active) 1393 ctx->is_active = false; 1394 } 1395 1396 /* 1397 * When removing the IBSS interface, overwrite the 1398 * BT traffic load with the stored one from the last 1399 * notification, if any. If this is a device that 1400 * doesn't implement this, this has no effect since 1401 * both values are the same and zero. 1402 */ 1403 if (vif->type == NL80211_IFTYPE_ADHOC) 1404 priv->bt_traffic_load = priv->last_bt_traffic_load; 1405 } 1406 1407 static void iwlagn_mac_remove_interface(struct ieee80211_hw *hw, 1408 struct ieee80211_vif *vif) 1409 { 1410 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1411 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif); 1412 1413 IWL_DEBUG_MAC80211(priv, "enter\n"); 1414 1415 mutex_lock(&priv->mutex); 1416 1417 WARN_ON(ctx->vif != vif); 1418 ctx->vif = NULL; 1419 1420 iwl_teardown_interface(priv, vif, false); 1421 1422 mutex_unlock(&priv->mutex); 1423 1424 IWL_DEBUG_MAC80211(priv, "leave\n"); 1425 1426 } 1427 1428 static int iwlagn_mac_change_interface(struct ieee80211_hw *hw, 1429 struct ieee80211_vif *vif, 1430 enum nl80211_iftype newtype, bool newp2p) 1431 { 1432 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1433 struct iwl_rxon_context *ctx, *tmp; 1434 enum nl80211_iftype newviftype = newtype; 1435 u32 interface_modes; 1436 int err; 1437 1438 IWL_DEBUG_MAC80211(priv, "enter\n"); 1439 1440 newtype = ieee80211_iftype_p2p(newtype, newp2p); 1441 1442 mutex_lock(&priv->mutex); 1443 1444 ctx = iwl_rxon_ctx_from_vif(vif); 1445 1446 /* 1447 * To simplify this code, only support changes on the 1448 * BSS context. The PAN context is usually reassigned 1449 * by creating/removing P2P interfaces anyway. 1450 */ 1451 if (ctx->ctxid != IWL_RXON_CTX_BSS) { 1452 err = -EBUSY; 1453 goto out; 1454 } 1455 1456 if (!ctx->vif || !iwl_is_ready_rf(priv)) { 1457 /* 1458 * Huh? But wait ... this can maybe happen when 1459 * we're in the middle of a firmware restart! 1460 */ 1461 err = -EBUSY; 1462 goto out; 1463 } 1464 1465 /* Check if the switch is supported in the same context */ 1466 interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes; 1467 if (!(interface_modes & BIT(newtype))) { 1468 err = -EBUSY; 1469 goto out; 1470 } 1471 1472 if (ctx->exclusive_interface_modes & BIT(newtype)) { 1473 for_each_context(priv, tmp) { 1474 if (ctx == tmp) 1475 continue; 1476 1477 if (!tmp->is_active) 1478 continue; 1479 1480 /* 1481 * The current mode switch would be exclusive, but 1482 * another context is active ... refuse the switch. 1483 */ 1484 err = -EBUSY; 1485 goto out; 1486 } 1487 } 1488 1489 /* success */ 1490 iwl_teardown_interface(priv, vif, true); 1491 vif->type = newviftype; 1492 vif->p2p = newp2p; 1493 err = iwl_setup_interface(priv, ctx); 1494 WARN_ON(err); 1495 /* 1496 * We've switched internally, but submitting to the 1497 * device may have failed for some reason. Mask this 1498 * error, because otherwise mac80211 will not switch 1499 * (and set the interface type back) and we'll be 1500 * out of sync with it. 1501 */ 1502 err = 0; 1503 1504 out: 1505 mutex_unlock(&priv->mutex); 1506 IWL_DEBUG_MAC80211(priv, "leave\n"); 1507 1508 return err; 1509 } 1510 1511 static int iwlagn_mac_hw_scan(struct ieee80211_hw *hw, 1512 struct ieee80211_vif *vif, 1513 struct ieee80211_scan_request *hw_req) 1514 { 1515 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1516 struct cfg80211_scan_request *req = &hw_req->req; 1517 int ret; 1518 1519 IWL_DEBUG_MAC80211(priv, "enter\n"); 1520 1521 if (req->n_channels == 0) 1522 return -EINVAL; 1523 1524 mutex_lock(&priv->mutex); 1525 1526 /* 1527 * If an internal scan is in progress, just set 1528 * up the scan_request as per above. 1529 */ 1530 if (priv->scan_type != IWL_SCAN_NORMAL) { 1531 IWL_DEBUG_SCAN(priv, 1532 "SCAN request during internal scan - defer\n"); 1533 priv->scan_request = req; 1534 priv->scan_vif = vif; 1535 ret = 0; 1536 } else { 1537 priv->scan_request = req; 1538 priv->scan_vif = vif; 1539 /* 1540 * mac80211 will only ask for one band at a time 1541 * so using channels[0] here is ok 1542 */ 1543 ret = iwl_scan_initiate(priv, vif, IWL_SCAN_NORMAL, 1544 req->channels[0]->band); 1545 if (ret) { 1546 priv->scan_request = NULL; 1547 priv->scan_vif = NULL; 1548 } 1549 } 1550 1551 IWL_DEBUG_MAC80211(priv, "leave\n"); 1552 1553 mutex_unlock(&priv->mutex); 1554 1555 return ret; 1556 } 1557 1558 static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id) 1559 { 1560 struct iwl_addsta_cmd cmd = { 1561 .mode = STA_CONTROL_MODIFY_MSK, 1562 .station_flags_msk = STA_FLG_PWR_SAVE_MSK, 1563 .sta.sta_id = sta_id, 1564 }; 1565 1566 iwl_send_add_sta(priv, &cmd, CMD_ASYNC); 1567 } 1568 1569 static void iwlagn_mac_sta_notify(struct ieee80211_hw *hw, 1570 struct ieee80211_vif *vif, 1571 enum sta_notify_cmd cmd, 1572 struct ieee80211_sta *sta) 1573 { 1574 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1575 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv; 1576 int sta_id; 1577 1578 IWL_DEBUG_MAC80211(priv, "enter\n"); 1579 1580 switch (cmd) { 1581 case STA_NOTIFY_SLEEP: 1582 WARN_ON(!sta_priv->client); 1583 sta_priv->asleep = true; 1584 if (atomic_read(&sta_priv->pending_frames) > 0) 1585 ieee80211_sta_block_awake(hw, sta, true); 1586 break; 1587 case STA_NOTIFY_AWAKE: 1588 WARN_ON(!sta_priv->client); 1589 if (!sta_priv->asleep) 1590 break; 1591 sta_priv->asleep = false; 1592 sta_id = iwl_sta_id(sta); 1593 if (sta_id != IWL_INVALID_STATION) 1594 iwl_sta_modify_ps_wake(priv, sta_id); 1595 break; 1596 default: 1597 break; 1598 } 1599 IWL_DEBUG_MAC80211(priv, "leave\n"); 1600 } 1601 1602 const struct ieee80211_ops iwlagn_hw_ops = { 1603 .tx = iwlagn_mac_tx, 1604 .start = iwlagn_mac_start, 1605 .stop = iwlagn_mac_stop, 1606 #ifdef CONFIG_PM_SLEEP 1607 .suspend = iwlagn_mac_suspend, 1608 .resume = iwlagn_mac_resume, 1609 .set_wakeup = iwlagn_mac_set_wakeup, 1610 #endif 1611 .add_interface = iwlagn_mac_add_interface, 1612 .remove_interface = iwlagn_mac_remove_interface, 1613 .change_interface = iwlagn_mac_change_interface, 1614 .config = iwlagn_mac_config, 1615 .configure_filter = iwlagn_configure_filter, 1616 .set_key = iwlagn_mac_set_key, 1617 .update_tkip_key = iwlagn_mac_update_tkip_key, 1618 .set_rekey_data = iwlagn_mac_set_rekey_data, 1619 .conf_tx = iwlagn_mac_conf_tx, 1620 .bss_info_changed = iwlagn_bss_info_changed, 1621 .ampdu_action = iwlagn_mac_ampdu_action, 1622 .hw_scan = iwlagn_mac_hw_scan, 1623 .sta_notify = iwlagn_mac_sta_notify, 1624 .sta_state = iwlagn_mac_sta_state, 1625 .channel_switch = iwlagn_mac_channel_switch, 1626 .flush = iwlagn_mac_flush, 1627 .tx_last_beacon = iwlagn_mac_tx_last_beacon, 1628 .event_callback = iwlagn_mac_event_callback, 1629 .set_tim = iwlagn_mac_set_tim, 1630 }; 1631 1632 /* This function both allocates and initializes hw and priv. */ 1633 struct ieee80211_hw *iwl_alloc_all(void) 1634 { 1635 struct iwl_priv *priv; 1636 struct iwl_op_mode *op_mode; 1637 /* mac80211 allocates memory for this device instance, including 1638 * space for this driver's private structure */ 1639 struct ieee80211_hw *hw; 1640 1641 hw = ieee80211_alloc_hw(sizeof(struct iwl_priv) + 1642 sizeof(struct iwl_op_mode), &iwlagn_hw_ops); 1643 if (!hw) 1644 goto out; 1645 1646 op_mode = hw->priv; 1647 priv = IWL_OP_MODE_GET_DVM(op_mode); 1648 priv->hw = hw; 1649 1650 out: 1651 return hw; 1652 } 1653