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.swcrypto) 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].num_sec && 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.swcrypto) 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[NL80211_BAND_2GHZ].n_channels) 206 priv->hw->wiphy->bands[NL80211_BAND_2GHZ] = 207 &priv->nvm_data->bands[NL80211_BAND_2GHZ]; 208 if (priv->nvm_data->bands[NL80211_BAND_5GHZ].n_channels) 209 priv->hw->wiphy->bands[NL80211_BAND_5GHZ] = 210 &priv->nvm_data->bands[NL80211_BAND_5GHZ]; 211 212 hw->wiphy->hw_version = priv->trans->hw_id; 213 214 iwl_leds_init(priv); 215 216 wiphy_ext_feature_set(hw->wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST); 217 218 ret = ieee80211_register_hw(priv->hw); 219 if (ret) { 220 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret); 221 iwl_leds_exit(priv); 222 return ret; 223 } 224 priv->mac80211_registered = 1; 225 226 return 0; 227 } 228 229 void iwlagn_mac_unregister(struct iwl_priv *priv) 230 { 231 if (!priv->mac80211_registered) 232 return; 233 iwl_leds_exit(priv); 234 ieee80211_unregister_hw(priv->hw); 235 priv->mac80211_registered = 0; 236 } 237 238 static int __iwl_up(struct iwl_priv *priv) 239 { 240 struct iwl_rxon_context *ctx; 241 int ret; 242 243 lockdep_assert_held(&priv->mutex); 244 245 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) { 246 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n"); 247 return -EIO; 248 } 249 250 for_each_context(priv, ctx) { 251 ret = iwlagn_alloc_bcast_station(priv, ctx); 252 if (ret) { 253 iwl_dealloc_bcast_stations(priv); 254 return ret; 255 } 256 } 257 258 ret = iwl_trans_start_hw(priv->trans); 259 if (ret) { 260 IWL_ERR(priv, "Failed to start HW: %d\n", ret); 261 goto error; 262 } 263 264 ret = iwl_run_init_ucode(priv); 265 if (ret) { 266 IWL_ERR(priv, "Failed to run INIT ucode: %d\n", ret); 267 goto error; 268 } 269 270 ret = iwl_trans_start_hw(priv->trans); 271 if (ret) { 272 IWL_ERR(priv, "Failed to start HW: %d\n", ret); 273 goto error; 274 } 275 276 ret = iwl_load_ucode_wait_alive(priv, IWL_UCODE_REGULAR); 277 if (ret) { 278 IWL_ERR(priv, "Failed to start RT ucode: %d\n", ret); 279 goto error; 280 } 281 282 ret = iwl_alive_start(priv); 283 if (ret) 284 goto error; 285 return 0; 286 287 error: 288 set_bit(STATUS_EXIT_PENDING, &priv->status); 289 iwl_down(priv); 290 clear_bit(STATUS_EXIT_PENDING, &priv->status); 291 292 IWL_ERR(priv, "Unable to initialize device.\n"); 293 return ret; 294 } 295 296 static int iwlagn_mac_start(struct ieee80211_hw *hw) 297 { 298 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 299 int ret; 300 301 IWL_DEBUG_MAC80211(priv, "enter\n"); 302 303 /* we should be verifying the device is ready to be opened */ 304 mutex_lock(&priv->mutex); 305 ret = __iwl_up(priv); 306 mutex_unlock(&priv->mutex); 307 if (ret) 308 return ret; 309 310 IWL_DEBUG_INFO(priv, "Start UP work done.\n"); 311 312 /* Now we should be done, and the READY bit should be set. */ 313 if (WARN_ON(!test_bit(STATUS_READY, &priv->status))) 314 ret = -EIO; 315 316 iwlagn_led_enable(priv); 317 318 priv->is_open = 1; 319 IWL_DEBUG_MAC80211(priv, "leave\n"); 320 return 0; 321 } 322 323 static void iwlagn_mac_stop(struct ieee80211_hw *hw) 324 { 325 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 326 327 IWL_DEBUG_MAC80211(priv, "enter\n"); 328 329 if (!priv->is_open) 330 return; 331 332 priv->is_open = 0; 333 334 mutex_lock(&priv->mutex); 335 iwl_down(priv); 336 mutex_unlock(&priv->mutex); 337 338 iwl_cancel_deferred_work(priv); 339 340 flush_workqueue(priv->workqueue); 341 342 IWL_DEBUG_MAC80211(priv, "leave\n"); 343 } 344 345 static void iwlagn_mac_set_rekey_data(struct ieee80211_hw *hw, 346 struct ieee80211_vif *vif, 347 struct cfg80211_gtk_rekey_data *data) 348 { 349 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 350 351 if (iwlwifi_mod_params.swcrypto) 352 return; 353 354 IWL_DEBUG_MAC80211(priv, "enter\n"); 355 mutex_lock(&priv->mutex); 356 357 if (priv->contexts[IWL_RXON_CTX_BSS].vif != vif) 358 goto out; 359 360 memcpy(priv->kek, data->kek, NL80211_KEK_LEN); 361 memcpy(priv->kck, data->kck, NL80211_KCK_LEN); 362 priv->replay_ctr = 363 cpu_to_le64(be64_to_cpup((__be64 *)&data->replay_ctr)); 364 priv->have_rekey_data = true; 365 366 out: 367 mutex_unlock(&priv->mutex); 368 IWL_DEBUG_MAC80211(priv, "leave\n"); 369 } 370 371 #ifdef CONFIG_PM_SLEEP 372 373 static int iwlagn_mac_suspend(struct ieee80211_hw *hw, 374 struct cfg80211_wowlan *wowlan) 375 { 376 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 377 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS]; 378 int ret; 379 380 if (WARN_ON(!wowlan)) 381 return -EINVAL; 382 383 IWL_DEBUG_MAC80211(priv, "enter\n"); 384 mutex_lock(&priv->mutex); 385 386 /* Don't attempt WoWLAN when not associated, tear down instead. */ 387 if (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION || 388 !iwl_is_associated_ctx(ctx)) { 389 ret = 1; 390 goto out; 391 } 392 393 ret = iwlagn_suspend(priv, wowlan); 394 if (ret) 395 goto error; 396 397 /* let the ucode operate on its own */ 398 iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_SET, 399 CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE); 400 401 iwl_trans_d3_suspend(priv->trans, false, true); 402 403 goto out; 404 405 error: 406 priv->wowlan = false; 407 iwlagn_prepare_restart(priv); 408 ieee80211_restart_hw(priv->hw); 409 out: 410 mutex_unlock(&priv->mutex); 411 IWL_DEBUG_MAC80211(priv, "leave\n"); 412 413 return ret; 414 } 415 416 struct iwl_resume_data { 417 struct iwl_priv *priv; 418 struct iwlagn_wowlan_status *cmd; 419 bool valid; 420 }; 421 422 static bool iwl_resume_status_fn(struct iwl_notif_wait_data *notif_wait, 423 struct iwl_rx_packet *pkt, void *data) 424 { 425 struct iwl_resume_data *resume_data = data; 426 struct iwl_priv *priv = resume_data->priv; 427 428 if (iwl_rx_packet_payload_len(pkt) != sizeof(*resume_data->cmd)) { 429 IWL_ERR(priv, "rx wrong size data\n"); 430 return true; 431 } 432 memcpy(resume_data->cmd, pkt->data, sizeof(*resume_data->cmd)); 433 resume_data->valid = true; 434 435 return true; 436 } 437 438 static int iwlagn_mac_resume(struct ieee80211_hw *hw) 439 { 440 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 441 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS]; 442 struct ieee80211_vif *vif; 443 u32 base; 444 int ret; 445 enum iwl_d3_status d3_status; 446 struct error_table_start { 447 /* cf. struct iwl_error_event_table */ 448 u32 valid; 449 u32 error_id; 450 } err_info; 451 struct iwl_notification_wait status_wait; 452 static const u16 status_cmd[] = { 453 REPLY_WOWLAN_GET_STATUS, 454 }; 455 struct iwlagn_wowlan_status status_data = {}; 456 struct iwl_resume_data resume_data = { 457 .priv = priv, 458 .cmd = &status_data, 459 .valid = false, 460 }; 461 struct cfg80211_wowlan_wakeup wakeup = { 462 .pattern_idx = -1, 463 }; 464 #ifdef CONFIG_IWLWIFI_DEBUGFS 465 const struct fw_img *img; 466 #endif 467 468 IWL_DEBUG_MAC80211(priv, "enter\n"); 469 mutex_lock(&priv->mutex); 470 471 /* we'll clear ctx->vif during iwlagn_prepare_restart() */ 472 vif = ctx->vif; 473 474 ret = iwl_trans_d3_resume(priv->trans, &d3_status, false, true); 475 if (ret) 476 goto out_unlock; 477 478 if (d3_status != IWL_D3_STATUS_ALIVE) { 479 IWL_INFO(priv, "Device was reset during suspend\n"); 480 goto out_unlock; 481 } 482 483 /* uCode is no longer operating by itself */ 484 iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_CLR, 485 CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE); 486 487 base = priv->device_pointers.error_event_table; 488 if (!iwlagn_hw_valid_rtc_data_addr(base)) { 489 IWL_WARN(priv, "Invalid error table during resume!\n"); 490 goto out_unlock; 491 } 492 493 iwl_trans_read_mem_bytes(priv->trans, base, 494 &err_info, sizeof(err_info)); 495 496 if (err_info.valid) { 497 IWL_INFO(priv, "error table is valid (%d, 0x%x)\n", 498 err_info.valid, err_info.error_id); 499 if (err_info.error_id == RF_KILL_INDICATOR_FOR_WOWLAN) { 500 wakeup.rfkill_release = true; 501 ieee80211_report_wowlan_wakeup(vif, &wakeup, 502 GFP_KERNEL); 503 } 504 goto out_unlock; 505 } 506 507 #ifdef CONFIG_IWLWIFI_DEBUGFS 508 img = &priv->fw->img[IWL_UCODE_WOWLAN]; 509 if (!priv->wowlan_sram) 510 priv->wowlan_sram = 511 kzalloc(img->sec[IWL_UCODE_SECTION_DATA].len, 512 GFP_KERNEL); 513 514 if (priv->wowlan_sram) 515 iwl_trans_read_mem(priv->trans, 0x800000, 516 priv->wowlan_sram, 517 img->sec[IWL_UCODE_SECTION_DATA].len / 4); 518 #endif 519 520 /* 521 * This is very strange. The GET_STATUS command is sent but the device 522 * doesn't reply properly, it seems it doesn't close the RBD so one is 523 * always left open ... As a result, we need to send another command 524 * and have to reset the driver afterwards. As we need to switch to 525 * runtime firmware again that'll happen. 526 */ 527 528 iwl_init_notification_wait(&priv->notif_wait, &status_wait, status_cmd, 529 ARRAY_SIZE(status_cmd), iwl_resume_status_fn, 530 &resume_data); 531 532 iwl_dvm_send_cmd_pdu(priv, REPLY_WOWLAN_GET_STATUS, CMD_ASYNC, 0, NULL); 533 iwl_dvm_send_cmd_pdu(priv, REPLY_ECHO, CMD_ASYNC, 0, NULL); 534 /* an RBD is left open in the firmware now! */ 535 536 ret = iwl_wait_notification(&priv->notif_wait, &status_wait, HZ/5); 537 if (ret) 538 goto out_unlock; 539 540 if (resume_data.valid && priv->contexts[IWL_RXON_CTX_BSS].vif) { 541 u32 reasons = le32_to_cpu(status_data.wakeup_reason); 542 struct cfg80211_wowlan_wakeup *wakeup_report; 543 544 IWL_INFO(priv, "WoWLAN wakeup reason(s): 0x%.8x\n", reasons); 545 546 if (reasons) { 547 if (reasons & IWLAGN_WOWLAN_WAKEUP_MAGIC_PACKET) 548 wakeup.magic_pkt = true; 549 if (reasons & IWLAGN_WOWLAN_WAKEUP_PATTERN_MATCH) 550 wakeup.pattern_idx = status_data.pattern_number; 551 if (reasons & (IWLAGN_WOWLAN_WAKEUP_BEACON_MISS | 552 IWLAGN_WOWLAN_WAKEUP_LINK_CHANGE)) 553 wakeup.disconnect = true; 554 if (reasons & IWLAGN_WOWLAN_WAKEUP_GTK_REKEY_FAIL) 555 wakeup.gtk_rekey_failure = true; 556 if (reasons & IWLAGN_WOWLAN_WAKEUP_EAP_IDENT_REQ) 557 wakeup.eap_identity_req = true; 558 if (reasons & IWLAGN_WOWLAN_WAKEUP_4WAY_HANDSHAKE) 559 wakeup.four_way_handshake = true; 560 wakeup_report = &wakeup; 561 } else { 562 wakeup_report = NULL; 563 } 564 565 ieee80211_report_wowlan_wakeup(vif, wakeup_report, GFP_KERNEL); 566 } 567 568 priv->wowlan = false; 569 570 iwlagn_prepare_restart(priv); 571 572 memset((void *)&ctx->active, 0, sizeof(ctx->active)); 573 iwl_connection_init_rx_config(priv, ctx); 574 iwlagn_set_rxon_chain(priv, ctx); 575 576 out_unlock: 577 mutex_unlock(&priv->mutex); 578 IWL_DEBUG_MAC80211(priv, "leave\n"); 579 580 ieee80211_resume_disconnect(vif); 581 582 return 1; 583 } 584 585 static void iwlagn_mac_set_wakeup(struct ieee80211_hw *hw, bool enabled) 586 { 587 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 588 589 device_set_wakeup_enable(priv->trans->dev, enabled); 590 } 591 #endif 592 593 static void iwlagn_mac_tx(struct ieee80211_hw *hw, 594 struct ieee80211_tx_control *control, 595 struct sk_buff *skb) 596 { 597 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 598 599 if (iwlagn_tx_skb(priv, control->sta, skb)) 600 ieee80211_free_txskb(hw, skb); 601 } 602 603 static void iwlagn_mac_update_tkip_key(struct ieee80211_hw *hw, 604 struct ieee80211_vif *vif, 605 struct ieee80211_key_conf *keyconf, 606 struct ieee80211_sta *sta, 607 u32 iv32, u16 *phase1key) 608 { 609 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 610 611 iwl_update_tkip_key(priv, vif, keyconf, sta, iv32, phase1key); 612 } 613 614 static int iwlagn_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd, 615 struct ieee80211_vif *vif, 616 struct ieee80211_sta *sta, 617 struct ieee80211_key_conf *key) 618 { 619 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 620 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv; 621 struct iwl_rxon_context *ctx = vif_priv->ctx; 622 int ret; 623 bool is_default_wep_key = false; 624 625 IWL_DEBUG_MAC80211(priv, "enter\n"); 626 627 if (iwlwifi_mod_params.swcrypto) { 628 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n"); 629 return -EOPNOTSUPP; 630 } 631 632 switch (key->cipher) { 633 case WLAN_CIPHER_SUITE_TKIP: 634 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC; 635 /* fall through */ 636 case WLAN_CIPHER_SUITE_CCMP: 637 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV; 638 break; 639 default: 640 break; 641 } 642 643 /* 644 * We could program these keys into the hardware as well, but we 645 * don't expect much multicast traffic in IBSS and having keys 646 * for more stations is probably more useful. 647 * 648 * Mark key TX-only and return 0. 649 */ 650 if (vif->type == NL80211_IFTYPE_ADHOC && 651 !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) { 652 key->hw_key_idx = WEP_INVALID_OFFSET; 653 return 0; 654 } 655 656 /* If they key was TX-only, accept deletion */ 657 if (cmd == DISABLE_KEY && key->hw_key_idx == WEP_INVALID_OFFSET) 658 return 0; 659 660 mutex_lock(&priv->mutex); 661 iwl_scan_cancel_timeout(priv, 100); 662 663 BUILD_BUG_ON(WEP_INVALID_OFFSET == IWLAGN_HW_KEY_DEFAULT); 664 665 /* 666 * If we are getting WEP group key and we didn't receive any key mapping 667 * so far, we are in legacy wep mode (group key only), otherwise we are 668 * in 1X mode. 669 * In legacy wep mode, we use another host command to the uCode. 670 */ 671 if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 || 672 key->cipher == WLAN_CIPHER_SUITE_WEP104) && !sta) { 673 if (cmd == SET_KEY) 674 is_default_wep_key = !ctx->key_mapping_keys; 675 else 676 is_default_wep_key = 677 key->hw_key_idx == IWLAGN_HW_KEY_DEFAULT; 678 } 679 680 681 switch (cmd) { 682 case SET_KEY: 683 if (is_default_wep_key) { 684 ret = iwl_set_default_wep_key(priv, vif_priv->ctx, key); 685 break; 686 } 687 ret = iwl_set_dynamic_key(priv, vif_priv->ctx, key, sta); 688 if (ret) { 689 /* 690 * can't add key for RX, but we don't need it 691 * in the device for TX so still return 0 692 */ 693 ret = 0; 694 key->hw_key_idx = WEP_INVALID_OFFSET; 695 } 696 697 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n"); 698 break; 699 case DISABLE_KEY: 700 if (is_default_wep_key) 701 ret = iwl_remove_default_wep_key(priv, ctx, key); 702 else 703 ret = iwl_remove_dynamic_key(priv, ctx, key, sta); 704 705 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n"); 706 break; 707 default: 708 ret = -EINVAL; 709 } 710 711 mutex_unlock(&priv->mutex); 712 IWL_DEBUG_MAC80211(priv, "leave\n"); 713 714 return ret; 715 } 716 717 static inline bool iwl_enable_rx_ampdu(const struct iwl_cfg *cfg) 718 { 719 if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG) 720 return false; 721 return true; 722 } 723 724 static inline bool iwl_enable_tx_ampdu(const struct iwl_cfg *cfg) 725 { 726 if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG) 727 return false; 728 if (iwlwifi_mod_params.disable_11n & IWL_ENABLE_HT_TXAGG) 729 return true; 730 731 /* disabled by default */ 732 return false; 733 } 734 735 static int iwlagn_mac_ampdu_action(struct ieee80211_hw *hw, 736 struct ieee80211_vif *vif, 737 struct ieee80211_ampdu_params *params) 738 { 739 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 740 int ret = -EINVAL; 741 struct ieee80211_sta *sta = params->sta; 742 enum ieee80211_ampdu_mlme_action action = params->action; 743 u16 tid = params->tid; 744 u16 *ssn = ¶ms->ssn; 745 u8 buf_size = params->buf_size; 746 struct iwl_station_priv *sta_priv = (void *) sta->drv_priv; 747 748 IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n", 749 sta->addr, tid); 750 751 if (!(priv->nvm_data->sku_cap_11n_enable)) 752 return -EACCES; 753 754 IWL_DEBUG_MAC80211(priv, "enter\n"); 755 mutex_lock(&priv->mutex); 756 757 switch (action) { 758 case IEEE80211_AMPDU_RX_START: 759 if (!iwl_enable_rx_ampdu(priv->cfg)) 760 break; 761 IWL_DEBUG_HT(priv, "start Rx\n"); 762 ret = iwl_sta_rx_agg_start(priv, sta, tid, *ssn); 763 break; 764 case IEEE80211_AMPDU_RX_STOP: 765 IWL_DEBUG_HT(priv, "stop Rx\n"); 766 ret = iwl_sta_rx_agg_stop(priv, sta, tid); 767 break; 768 case IEEE80211_AMPDU_TX_START: 769 if (!priv->trans->ops->txq_enable) 770 break; 771 if (!iwl_enable_tx_ampdu(priv->cfg)) 772 break; 773 IWL_DEBUG_HT(priv, "start Tx\n"); 774 ret = iwlagn_tx_agg_start(priv, vif, sta, tid, ssn); 775 break; 776 case IEEE80211_AMPDU_TX_STOP_FLUSH: 777 case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT: 778 IWL_DEBUG_HT(priv, "Flush Tx\n"); 779 ret = iwlagn_tx_agg_flush(priv, vif, sta, tid); 780 break; 781 case IEEE80211_AMPDU_TX_STOP_CONT: 782 IWL_DEBUG_HT(priv, "stop Tx\n"); 783 ret = iwlagn_tx_agg_stop(priv, vif, sta, tid); 784 if ((ret == 0) && (priv->agg_tids_count > 0)) { 785 priv->agg_tids_count--; 786 IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n", 787 priv->agg_tids_count); 788 } 789 if (!priv->agg_tids_count && 790 priv->hw_params.use_rts_for_aggregation) { 791 /* 792 * switch off RTS/CTS if it was previously enabled 793 */ 794 sta_priv->lq_sta.lq.general_params.flags &= 795 ~LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK; 796 iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif), 797 &sta_priv->lq_sta.lq, CMD_ASYNC, false); 798 } 799 break; 800 case IEEE80211_AMPDU_TX_OPERATIONAL: 801 ret = iwlagn_tx_agg_oper(priv, vif, sta, tid, buf_size); 802 break; 803 } 804 mutex_unlock(&priv->mutex); 805 IWL_DEBUG_MAC80211(priv, "leave\n"); 806 return ret; 807 } 808 809 static int iwlagn_mac_sta_add(struct ieee80211_hw *hw, 810 struct ieee80211_vif *vif, 811 struct ieee80211_sta *sta) 812 { 813 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 814 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv; 815 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv; 816 bool is_ap = vif->type == NL80211_IFTYPE_STATION; 817 int ret; 818 u8 sta_id; 819 820 IWL_DEBUG_INFO(priv, "proceeding to add station %pM\n", 821 sta->addr); 822 sta_priv->sta_id = IWL_INVALID_STATION; 823 824 atomic_set(&sta_priv->pending_frames, 0); 825 if (vif->type == NL80211_IFTYPE_AP) 826 sta_priv->client = true; 827 828 ret = iwl_add_station_common(priv, vif_priv->ctx, sta->addr, 829 is_ap, sta, &sta_id); 830 if (ret) { 831 IWL_ERR(priv, "Unable to add station %pM (%d)\n", 832 sta->addr, ret); 833 /* Should we return success if return code is EEXIST ? */ 834 return ret; 835 } 836 837 sta_priv->sta_id = sta_id; 838 839 return 0; 840 } 841 842 static int iwlagn_mac_sta_remove(struct ieee80211_hw *hw, 843 struct ieee80211_vif *vif, 844 struct ieee80211_sta *sta) 845 { 846 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 847 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv; 848 int ret; 849 850 IWL_DEBUG_INFO(priv, "proceeding to remove station %pM\n", sta->addr); 851 852 if (vif->type == NL80211_IFTYPE_STATION) { 853 /* 854 * Station will be removed from device when the RXON 855 * is set to unassociated -- just deactivate it here 856 * to avoid re-programming it. 857 */ 858 ret = 0; 859 iwl_deactivate_station(priv, sta_priv->sta_id, sta->addr); 860 } else { 861 ret = iwl_remove_station(priv, sta_priv->sta_id, sta->addr); 862 if (ret) 863 IWL_DEBUG_QUIET_RFKILL(priv, 864 "Error removing station %pM\n", sta->addr); 865 } 866 return ret; 867 } 868 869 static int iwlagn_mac_sta_state(struct ieee80211_hw *hw, 870 struct ieee80211_vif *vif, 871 struct ieee80211_sta *sta, 872 enum ieee80211_sta_state old_state, 873 enum ieee80211_sta_state new_state) 874 { 875 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 876 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv; 877 enum { 878 NONE, ADD, REMOVE, HT_RATE_INIT, ADD_RATE_INIT, 879 } op = NONE; 880 int ret; 881 882 IWL_DEBUG_MAC80211(priv, "station %pM state change %d->%d\n", 883 sta->addr, old_state, new_state); 884 885 mutex_lock(&priv->mutex); 886 if (vif->type == NL80211_IFTYPE_STATION) { 887 if (old_state == IEEE80211_STA_NOTEXIST && 888 new_state == IEEE80211_STA_NONE) 889 op = ADD; 890 else if (old_state == IEEE80211_STA_NONE && 891 new_state == IEEE80211_STA_NOTEXIST) 892 op = REMOVE; 893 else if (old_state == IEEE80211_STA_AUTH && 894 new_state == IEEE80211_STA_ASSOC) 895 op = HT_RATE_INIT; 896 } else { 897 if (old_state == IEEE80211_STA_AUTH && 898 new_state == IEEE80211_STA_ASSOC) 899 op = ADD_RATE_INIT; 900 else if (old_state == IEEE80211_STA_ASSOC && 901 new_state == IEEE80211_STA_AUTH) 902 op = REMOVE; 903 } 904 905 switch (op) { 906 case ADD: 907 ret = iwlagn_mac_sta_add(hw, vif, sta); 908 if (ret) 909 break; 910 /* 911 * Clear the in-progress flag, the AP station entry was added 912 * but we'll initialize LQ only when we've associated (which 913 * would also clear the in-progress flag). This is necessary 914 * in case we never initialize LQ because association fails. 915 */ 916 spin_lock_bh(&priv->sta_lock); 917 priv->stations[iwl_sta_id(sta)].used &= 918 ~IWL_STA_UCODE_INPROGRESS; 919 spin_unlock_bh(&priv->sta_lock); 920 break; 921 case REMOVE: 922 ret = iwlagn_mac_sta_remove(hw, vif, sta); 923 break; 924 case ADD_RATE_INIT: 925 ret = iwlagn_mac_sta_add(hw, vif, sta); 926 if (ret) 927 break; 928 /* Initialize rate scaling */ 929 IWL_DEBUG_INFO(priv, 930 "Initializing rate scaling for station %pM\n", 931 sta->addr); 932 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta)); 933 ret = 0; 934 break; 935 case HT_RATE_INIT: 936 /* Initialize rate scaling */ 937 ret = iwl_sta_update_ht(priv, vif_priv->ctx, sta); 938 if (ret) 939 break; 940 IWL_DEBUG_INFO(priv, 941 "Initializing rate scaling for station %pM\n", 942 sta->addr); 943 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta)); 944 ret = 0; 945 break; 946 default: 947 ret = 0; 948 break; 949 } 950 951 /* 952 * mac80211 might WARN if we fail, but due the way we 953 * (badly) handle hard rfkill, we might fail here 954 */ 955 if (iwl_is_rfkill(priv)) 956 ret = 0; 957 958 mutex_unlock(&priv->mutex); 959 IWL_DEBUG_MAC80211(priv, "leave\n"); 960 961 return ret; 962 } 963 964 static void iwlagn_mac_channel_switch(struct ieee80211_hw *hw, 965 struct ieee80211_vif *vif, 966 struct ieee80211_channel_switch *ch_switch) 967 { 968 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 969 struct ieee80211_conf *conf = &hw->conf; 970 struct ieee80211_channel *channel = ch_switch->chandef.chan; 971 struct iwl_ht_config *ht_conf = &priv->current_ht_config; 972 /* 973 * MULTI-FIXME 974 * When we add support for multiple interfaces, we need to 975 * revisit this. The channel switch command in the device 976 * only affects the BSS context, but what does that really 977 * mean? And what if we get a CSA on the second interface? 978 * This needs a lot of work. 979 */ 980 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS]; 981 u16 ch; 982 983 IWL_DEBUG_MAC80211(priv, "enter\n"); 984 985 mutex_lock(&priv->mutex); 986 987 if (iwl_is_rfkill(priv)) 988 goto out; 989 990 if (test_bit(STATUS_EXIT_PENDING, &priv->status) || 991 test_bit(STATUS_SCANNING, &priv->status) || 992 test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status)) 993 goto out; 994 995 if (!iwl_is_associated_ctx(ctx)) 996 goto out; 997 998 if (!priv->lib->set_channel_switch) 999 goto out; 1000 1001 ch = channel->hw_value; 1002 if (le16_to_cpu(ctx->active.channel) == ch) 1003 goto out; 1004 1005 priv->current_ht_config.smps = conf->smps_mode; 1006 1007 /* Configure HT40 channels */ 1008 switch (cfg80211_get_chandef_type(&ch_switch->chandef)) { 1009 case NL80211_CHAN_NO_HT: 1010 case NL80211_CHAN_HT20: 1011 ctx->ht.is_40mhz = false; 1012 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE; 1013 break; 1014 case NL80211_CHAN_HT40MINUS: 1015 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_BELOW; 1016 ctx->ht.is_40mhz = true; 1017 break; 1018 case NL80211_CHAN_HT40PLUS: 1019 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_ABOVE; 1020 ctx->ht.is_40mhz = true; 1021 break; 1022 } 1023 1024 if ((le16_to_cpu(ctx->staging.channel) != ch)) 1025 ctx->staging.flags = 0; 1026 1027 iwl_set_rxon_channel(priv, channel, ctx); 1028 iwl_set_rxon_ht(priv, ht_conf); 1029 iwl_set_flags_for_band(priv, ctx, channel->band, ctx->vif); 1030 1031 /* 1032 * at this point, staging_rxon has the 1033 * configuration for channel switch 1034 */ 1035 set_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status); 1036 priv->switch_channel = cpu_to_le16(ch); 1037 if (priv->lib->set_channel_switch(priv, ch_switch)) { 1038 clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status); 1039 priv->switch_channel = 0; 1040 ieee80211_chswitch_done(ctx->vif, false); 1041 } 1042 1043 out: 1044 mutex_unlock(&priv->mutex); 1045 IWL_DEBUG_MAC80211(priv, "leave\n"); 1046 } 1047 1048 void iwl_chswitch_done(struct iwl_priv *priv, bool is_success) 1049 { 1050 /* 1051 * MULTI-FIXME 1052 * See iwlagn_mac_channel_switch. 1053 */ 1054 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS]; 1055 1056 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) 1057 return; 1058 1059 if (!test_and_clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status)) 1060 return; 1061 1062 if (ctx->vif) 1063 ieee80211_chswitch_done(ctx->vif, is_success); 1064 } 1065 1066 static void iwlagn_configure_filter(struct ieee80211_hw *hw, 1067 unsigned int changed_flags, 1068 unsigned int *total_flags, 1069 u64 multicast) 1070 { 1071 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1072 __le32 filter_or = 0, filter_nand = 0; 1073 struct iwl_rxon_context *ctx; 1074 1075 #define CHK(test, flag) do { \ 1076 if (*total_flags & (test)) \ 1077 filter_or |= (flag); \ 1078 else \ 1079 filter_nand |= (flag); \ 1080 } while (0) 1081 1082 IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n", 1083 changed_flags, *total_flags); 1084 1085 CHK(FIF_OTHER_BSS, RXON_FILTER_PROMISC_MSK); 1086 /* Setting _just_ RXON_FILTER_CTL2HOST_MSK causes FH errors */ 1087 CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_PROMISC_MSK); 1088 CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK); 1089 1090 #undef CHK 1091 1092 mutex_lock(&priv->mutex); 1093 1094 for_each_context(priv, ctx) { 1095 ctx->staging.filter_flags &= ~filter_nand; 1096 ctx->staging.filter_flags |= filter_or; 1097 1098 /* 1099 * Not committing directly because hardware can perform a scan, 1100 * but we'll eventually commit the filter flags change anyway. 1101 */ 1102 } 1103 1104 mutex_unlock(&priv->mutex); 1105 1106 /* 1107 * Receiving all multicast frames is always enabled by the 1108 * default flags setup in iwl_connection_init_rx_config() 1109 * since we currently do not support programming multicast 1110 * filters into the device. 1111 */ 1112 *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | 1113 FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL; 1114 } 1115 1116 static void iwlagn_mac_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 1117 u32 queues, bool drop) 1118 { 1119 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1120 u32 scd_queues; 1121 1122 mutex_lock(&priv->mutex); 1123 IWL_DEBUG_MAC80211(priv, "enter\n"); 1124 1125 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) { 1126 IWL_DEBUG_TX(priv, "Aborting flush due to device shutdown\n"); 1127 goto done; 1128 } 1129 if (iwl_is_rfkill(priv)) { 1130 IWL_DEBUG_TX(priv, "Aborting flush due to RF Kill\n"); 1131 goto done; 1132 } 1133 1134 scd_queues = BIT(priv->cfg->base_params->num_of_queues) - 1; 1135 scd_queues &= ~(BIT(IWL_IPAN_CMD_QUEUE_NUM) | 1136 BIT(IWL_DEFAULT_CMD_QUEUE_NUM)); 1137 1138 if (drop) { 1139 IWL_DEBUG_TX_QUEUES(priv, "Flushing SCD queues: 0x%x\n", 1140 scd_queues); 1141 if (iwlagn_txfifo_flush(priv, scd_queues)) { 1142 IWL_ERR(priv, "flush request fail\n"); 1143 goto done; 1144 } 1145 } 1146 1147 IWL_DEBUG_TX_QUEUES(priv, "wait transmit/flush all frames\n"); 1148 iwl_trans_wait_tx_queues_empty(priv->trans, scd_queues); 1149 done: 1150 mutex_unlock(&priv->mutex); 1151 IWL_DEBUG_MAC80211(priv, "leave\n"); 1152 } 1153 1154 static void iwlagn_mac_event_callback(struct ieee80211_hw *hw, 1155 struct ieee80211_vif *vif, 1156 const struct ieee80211_event *event) 1157 { 1158 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1159 1160 if (event->type != RSSI_EVENT) 1161 return; 1162 1163 IWL_DEBUG_MAC80211(priv, "enter\n"); 1164 1165 if (priv->lib->bt_params && 1166 priv->lib->bt_params->advanced_bt_coexist) { 1167 if (event->u.rssi.data == RSSI_EVENT_LOW) 1168 priv->bt_enable_pspoll = true; 1169 else if (event->u.rssi.data == RSSI_EVENT_HIGH) 1170 priv->bt_enable_pspoll = false; 1171 1172 queue_work(priv->workqueue, &priv->bt_runtime_config); 1173 } else { 1174 IWL_DEBUG_MAC80211(priv, "Advanced BT coex disabled," 1175 "ignoring RSSI callback\n"); 1176 } 1177 1178 IWL_DEBUG_MAC80211(priv, "leave\n"); 1179 } 1180 1181 static int iwlagn_mac_set_tim(struct ieee80211_hw *hw, 1182 struct ieee80211_sta *sta, bool set) 1183 { 1184 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1185 1186 queue_work(priv->workqueue, &priv->beacon_update); 1187 1188 return 0; 1189 } 1190 1191 static int iwlagn_mac_conf_tx(struct ieee80211_hw *hw, 1192 struct ieee80211_vif *vif, u16 queue, 1193 const struct ieee80211_tx_queue_params *params) 1194 { 1195 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1196 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv; 1197 struct iwl_rxon_context *ctx = vif_priv->ctx; 1198 int q; 1199 1200 if (WARN_ON(!ctx)) 1201 return -EINVAL; 1202 1203 IWL_DEBUG_MAC80211(priv, "enter\n"); 1204 1205 if (!iwl_is_ready_rf(priv)) { 1206 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n"); 1207 return -EIO; 1208 } 1209 1210 if (queue >= AC_NUM) { 1211 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue); 1212 return 0; 1213 } 1214 1215 q = AC_NUM - 1 - queue; 1216 1217 mutex_lock(&priv->mutex); 1218 1219 ctx->qos_data.def_qos_parm.ac[q].cw_min = 1220 cpu_to_le16(params->cw_min); 1221 ctx->qos_data.def_qos_parm.ac[q].cw_max = 1222 cpu_to_le16(params->cw_max); 1223 ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs; 1224 ctx->qos_data.def_qos_parm.ac[q].edca_txop = 1225 cpu_to_le16((params->txop * 32)); 1226 1227 ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0; 1228 1229 mutex_unlock(&priv->mutex); 1230 1231 IWL_DEBUG_MAC80211(priv, "leave\n"); 1232 return 0; 1233 } 1234 1235 static int iwlagn_mac_tx_last_beacon(struct ieee80211_hw *hw) 1236 { 1237 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1238 1239 return priv->ibss_manager == IWL_IBSS_MANAGER; 1240 } 1241 1242 static int iwl_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx) 1243 { 1244 iwl_connection_init_rx_config(priv, ctx); 1245 1246 iwlagn_set_rxon_chain(priv, ctx); 1247 1248 return iwlagn_commit_rxon(priv, ctx); 1249 } 1250 1251 static int iwl_setup_interface(struct iwl_priv *priv, 1252 struct iwl_rxon_context *ctx) 1253 { 1254 struct ieee80211_vif *vif = ctx->vif; 1255 int err, ac; 1256 1257 lockdep_assert_held(&priv->mutex); 1258 1259 /* 1260 * This variable will be correct only when there's just 1261 * a single context, but all code using it is for hardware 1262 * that supports only one context. 1263 */ 1264 priv->iw_mode = vif->type; 1265 1266 ctx->is_active = true; 1267 1268 err = iwl_set_mode(priv, ctx); 1269 if (err) { 1270 if (!ctx->always_active) 1271 ctx->is_active = false; 1272 return err; 1273 } 1274 1275 if (priv->lib->bt_params && priv->lib->bt_params->advanced_bt_coexist && 1276 vif->type == NL80211_IFTYPE_ADHOC) { 1277 /* 1278 * pretend to have high BT traffic as long as we 1279 * are operating in IBSS mode, as this will cause 1280 * the rate scaling etc. to behave as intended. 1281 */ 1282 priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH; 1283 } 1284 1285 /* set up queue mappings */ 1286 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 1287 vif->hw_queue[ac] = ctx->ac_to_queue[ac]; 1288 1289 if (vif->type == NL80211_IFTYPE_AP) 1290 vif->cab_queue = ctx->mcast_queue; 1291 else 1292 vif->cab_queue = IEEE80211_INVAL_HW_QUEUE; 1293 1294 return 0; 1295 } 1296 1297 static int iwlagn_mac_add_interface(struct ieee80211_hw *hw, 1298 struct ieee80211_vif *vif) 1299 { 1300 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1301 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv; 1302 struct iwl_rxon_context *tmp, *ctx = NULL; 1303 int err; 1304 enum nl80211_iftype viftype = ieee80211_vif_type_p2p(vif); 1305 bool reset = false; 1306 1307 IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n", 1308 viftype, vif->addr); 1309 1310 mutex_lock(&priv->mutex); 1311 1312 if (!iwl_is_ready_rf(priv)) { 1313 IWL_WARN(priv, "Try to add interface when device not ready\n"); 1314 err = -EINVAL; 1315 goto out; 1316 } 1317 1318 for_each_context(priv, tmp) { 1319 u32 possible_modes = 1320 tmp->interface_modes | tmp->exclusive_interface_modes; 1321 1322 if (tmp->vif) { 1323 /* On reset we need to add the same interface again */ 1324 if (tmp->vif == vif) { 1325 reset = true; 1326 ctx = tmp; 1327 break; 1328 } 1329 1330 /* check if this busy context is exclusive */ 1331 if (tmp->exclusive_interface_modes & 1332 BIT(tmp->vif->type)) { 1333 err = -EINVAL; 1334 goto out; 1335 } 1336 continue; 1337 } 1338 1339 if (!(possible_modes & BIT(viftype))) 1340 continue; 1341 1342 /* have maybe usable context w/o interface */ 1343 ctx = tmp; 1344 break; 1345 } 1346 1347 if (!ctx) { 1348 err = -EOPNOTSUPP; 1349 goto out; 1350 } 1351 1352 vif_priv->ctx = ctx; 1353 ctx->vif = vif; 1354 1355 /* 1356 * In SNIFFER device type, the firmware reports the FCS to 1357 * the host, rather than snipping it off. Unfortunately, 1358 * mac80211 doesn't (yet) provide a per-packet flag for 1359 * this, so that we have to set the hardware flag based 1360 * on the interfaces added. As the monitor interface can 1361 * only be present by itself, and will be removed before 1362 * other interfaces are added, this is safe. 1363 */ 1364 if (vif->type == NL80211_IFTYPE_MONITOR) 1365 ieee80211_hw_set(priv->hw, RX_INCLUDES_FCS); 1366 else 1367 __clear_bit(IEEE80211_HW_RX_INCLUDES_FCS, priv->hw->flags); 1368 1369 err = iwl_setup_interface(priv, ctx); 1370 if (!err || reset) 1371 goto out; 1372 1373 ctx->vif = NULL; 1374 priv->iw_mode = NL80211_IFTYPE_STATION; 1375 out: 1376 mutex_unlock(&priv->mutex); 1377 1378 IWL_DEBUG_MAC80211(priv, "leave\n"); 1379 return err; 1380 } 1381 1382 static void iwl_teardown_interface(struct iwl_priv *priv, 1383 struct ieee80211_vif *vif, 1384 bool mode_change) 1385 { 1386 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif); 1387 1388 lockdep_assert_held(&priv->mutex); 1389 1390 if (priv->scan_vif == vif) { 1391 iwl_scan_cancel_timeout(priv, 200); 1392 iwl_force_scan_end(priv); 1393 } 1394 1395 if (!mode_change) { 1396 iwl_set_mode(priv, ctx); 1397 if (!ctx->always_active) 1398 ctx->is_active = false; 1399 } 1400 1401 /* 1402 * When removing the IBSS interface, overwrite the 1403 * BT traffic load with the stored one from the last 1404 * notification, if any. If this is a device that 1405 * doesn't implement this, this has no effect since 1406 * both values are the same and zero. 1407 */ 1408 if (vif->type == NL80211_IFTYPE_ADHOC) 1409 priv->bt_traffic_load = priv->last_bt_traffic_load; 1410 } 1411 1412 static void iwlagn_mac_remove_interface(struct ieee80211_hw *hw, 1413 struct ieee80211_vif *vif) 1414 { 1415 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1416 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif); 1417 1418 IWL_DEBUG_MAC80211(priv, "enter\n"); 1419 1420 mutex_lock(&priv->mutex); 1421 1422 WARN_ON(ctx->vif != vif); 1423 ctx->vif = NULL; 1424 1425 iwl_teardown_interface(priv, vif, false); 1426 1427 mutex_unlock(&priv->mutex); 1428 1429 IWL_DEBUG_MAC80211(priv, "leave\n"); 1430 1431 } 1432 1433 static int iwlagn_mac_change_interface(struct ieee80211_hw *hw, 1434 struct ieee80211_vif *vif, 1435 enum nl80211_iftype newtype, bool newp2p) 1436 { 1437 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1438 struct iwl_rxon_context *ctx, *tmp; 1439 enum nl80211_iftype newviftype = newtype; 1440 u32 interface_modes; 1441 int err; 1442 1443 IWL_DEBUG_MAC80211(priv, "enter\n"); 1444 1445 newtype = ieee80211_iftype_p2p(newtype, newp2p); 1446 1447 mutex_lock(&priv->mutex); 1448 1449 ctx = iwl_rxon_ctx_from_vif(vif); 1450 1451 /* 1452 * To simplify this code, only support changes on the 1453 * BSS context. The PAN context is usually reassigned 1454 * by creating/removing P2P interfaces anyway. 1455 */ 1456 if (ctx->ctxid != IWL_RXON_CTX_BSS) { 1457 err = -EBUSY; 1458 goto out; 1459 } 1460 1461 if (!ctx->vif || !iwl_is_ready_rf(priv)) { 1462 /* 1463 * Huh? But wait ... this can maybe happen when 1464 * we're in the middle of a firmware restart! 1465 */ 1466 err = -EBUSY; 1467 goto out; 1468 } 1469 1470 /* Check if the switch is supported in the same context */ 1471 interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes; 1472 if (!(interface_modes & BIT(newtype))) { 1473 err = -EBUSY; 1474 goto out; 1475 } 1476 1477 if (ctx->exclusive_interface_modes & BIT(newtype)) { 1478 for_each_context(priv, tmp) { 1479 if (ctx == tmp) 1480 continue; 1481 1482 if (!tmp->is_active) 1483 continue; 1484 1485 /* 1486 * The current mode switch would be exclusive, but 1487 * another context is active ... refuse the switch. 1488 */ 1489 err = -EBUSY; 1490 goto out; 1491 } 1492 } 1493 1494 /* success */ 1495 iwl_teardown_interface(priv, vif, true); 1496 vif->type = newviftype; 1497 vif->p2p = newp2p; 1498 err = iwl_setup_interface(priv, ctx); 1499 WARN_ON(err); 1500 /* 1501 * We've switched internally, but submitting to the 1502 * device may have failed for some reason. Mask this 1503 * error, because otherwise mac80211 will not switch 1504 * (and set the interface type back) and we'll be 1505 * out of sync with it. 1506 */ 1507 err = 0; 1508 1509 out: 1510 mutex_unlock(&priv->mutex); 1511 IWL_DEBUG_MAC80211(priv, "leave\n"); 1512 1513 return err; 1514 } 1515 1516 static int iwlagn_mac_hw_scan(struct ieee80211_hw *hw, 1517 struct ieee80211_vif *vif, 1518 struct ieee80211_scan_request *hw_req) 1519 { 1520 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1521 struct cfg80211_scan_request *req = &hw_req->req; 1522 int ret; 1523 1524 IWL_DEBUG_MAC80211(priv, "enter\n"); 1525 1526 if (req->n_channels == 0) 1527 return -EINVAL; 1528 1529 mutex_lock(&priv->mutex); 1530 1531 /* 1532 * If an internal scan is in progress, just set 1533 * up the scan_request as per above. 1534 */ 1535 if (priv->scan_type != IWL_SCAN_NORMAL) { 1536 IWL_DEBUG_SCAN(priv, 1537 "SCAN request during internal scan - defer\n"); 1538 priv->scan_request = req; 1539 priv->scan_vif = vif; 1540 ret = 0; 1541 } else { 1542 priv->scan_request = req; 1543 priv->scan_vif = vif; 1544 /* 1545 * mac80211 will only ask for one band at a time 1546 * so using channels[0] here is ok 1547 */ 1548 ret = iwl_scan_initiate(priv, vif, IWL_SCAN_NORMAL, 1549 req->channels[0]->band); 1550 if (ret) { 1551 priv->scan_request = NULL; 1552 priv->scan_vif = NULL; 1553 } 1554 } 1555 1556 IWL_DEBUG_MAC80211(priv, "leave\n"); 1557 1558 mutex_unlock(&priv->mutex); 1559 1560 return ret; 1561 } 1562 1563 static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id) 1564 { 1565 struct iwl_addsta_cmd cmd = { 1566 .mode = STA_CONTROL_MODIFY_MSK, 1567 .station_flags_msk = STA_FLG_PWR_SAVE_MSK, 1568 .sta.sta_id = sta_id, 1569 }; 1570 1571 iwl_send_add_sta(priv, &cmd, CMD_ASYNC); 1572 } 1573 1574 static void iwlagn_mac_sta_notify(struct ieee80211_hw *hw, 1575 struct ieee80211_vif *vif, 1576 enum sta_notify_cmd cmd, 1577 struct ieee80211_sta *sta) 1578 { 1579 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1580 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv; 1581 int sta_id; 1582 1583 IWL_DEBUG_MAC80211(priv, "enter\n"); 1584 1585 switch (cmd) { 1586 case STA_NOTIFY_SLEEP: 1587 WARN_ON(!sta_priv->client); 1588 sta_priv->asleep = true; 1589 if (atomic_read(&sta_priv->pending_frames) > 0) 1590 ieee80211_sta_block_awake(hw, sta, true); 1591 break; 1592 case STA_NOTIFY_AWAKE: 1593 WARN_ON(!sta_priv->client); 1594 if (!sta_priv->asleep) 1595 break; 1596 sta_priv->asleep = false; 1597 sta_id = iwl_sta_id(sta); 1598 if (sta_id != IWL_INVALID_STATION) 1599 iwl_sta_modify_ps_wake(priv, sta_id); 1600 break; 1601 default: 1602 break; 1603 } 1604 IWL_DEBUG_MAC80211(priv, "leave\n"); 1605 } 1606 1607 const struct ieee80211_ops iwlagn_hw_ops = { 1608 .tx = iwlagn_mac_tx, 1609 .start = iwlagn_mac_start, 1610 .stop = iwlagn_mac_stop, 1611 #ifdef CONFIG_PM_SLEEP 1612 .suspend = iwlagn_mac_suspend, 1613 .resume = iwlagn_mac_resume, 1614 .set_wakeup = iwlagn_mac_set_wakeup, 1615 #endif 1616 .add_interface = iwlagn_mac_add_interface, 1617 .remove_interface = iwlagn_mac_remove_interface, 1618 .change_interface = iwlagn_mac_change_interface, 1619 .config = iwlagn_mac_config, 1620 .configure_filter = iwlagn_configure_filter, 1621 .set_key = iwlagn_mac_set_key, 1622 .update_tkip_key = iwlagn_mac_update_tkip_key, 1623 .set_rekey_data = iwlagn_mac_set_rekey_data, 1624 .conf_tx = iwlagn_mac_conf_tx, 1625 .bss_info_changed = iwlagn_bss_info_changed, 1626 .ampdu_action = iwlagn_mac_ampdu_action, 1627 .hw_scan = iwlagn_mac_hw_scan, 1628 .sta_notify = iwlagn_mac_sta_notify, 1629 .sta_state = iwlagn_mac_sta_state, 1630 .channel_switch = iwlagn_mac_channel_switch, 1631 .flush = iwlagn_mac_flush, 1632 .tx_last_beacon = iwlagn_mac_tx_last_beacon, 1633 .event_callback = iwlagn_mac_event_callback, 1634 .set_tim = iwlagn_mac_set_tim, 1635 }; 1636 1637 /* This function both allocates and initializes hw and priv. */ 1638 struct ieee80211_hw *iwl_alloc_all(void) 1639 { 1640 struct iwl_priv *priv; 1641 struct iwl_op_mode *op_mode; 1642 /* mac80211 allocates memory for this device instance, including 1643 * space for this driver's private structure */ 1644 struct ieee80211_hw *hw; 1645 1646 hw = ieee80211_alloc_hw(sizeof(struct iwl_priv) + 1647 sizeof(struct iwl_op_mode), &iwlagn_hw_ops); 1648 if (!hw) 1649 goto out; 1650 1651 op_mode = hw->priv; 1652 priv = IWL_OP_MODE_GET_DVM(op_mode); 1653 priv->hw = hw; 1654 1655 out: 1656 return hw; 1657 } 1658