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, true); 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, true); 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 struct ieee80211_ampdu_params *params) 736 { 737 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 738 int ret = -EINVAL; 739 struct ieee80211_sta *sta = params->sta; 740 enum ieee80211_ampdu_mlme_action action = params->action; 741 u16 tid = params->tid; 742 u16 *ssn = ¶ms->ssn; 743 u8 buf_size = params->buf_size; 744 struct iwl_station_priv *sta_priv = (void *) sta->drv_priv; 745 746 IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n", 747 sta->addr, tid); 748 749 if (!(priv->nvm_data->sku_cap_11n_enable)) 750 return -EACCES; 751 752 IWL_DEBUG_MAC80211(priv, "enter\n"); 753 mutex_lock(&priv->mutex); 754 755 switch (action) { 756 case IEEE80211_AMPDU_RX_START: 757 if (!iwl_enable_rx_ampdu(priv->cfg)) 758 break; 759 IWL_DEBUG_HT(priv, "start Rx\n"); 760 ret = iwl_sta_rx_agg_start(priv, sta, tid, *ssn); 761 break; 762 case IEEE80211_AMPDU_RX_STOP: 763 IWL_DEBUG_HT(priv, "stop Rx\n"); 764 ret = iwl_sta_rx_agg_stop(priv, sta, tid); 765 break; 766 case IEEE80211_AMPDU_TX_START: 767 if (!priv->trans->ops->txq_enable) 768 break; 769 if (!iwl_enable_tx_ampdu(priv->cfg)) 770 break; 771 IWL_DEBUG_HT(priv, "start Tx\n"); 772 ret = iwlagn_tx_agg_start(priv, vif, sta, tid, ssn); 773 break; 774 case IEEE80211_AMPDU_TX_STOP_FLUSH: 775 case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT: 776 IWL_DEBUG_HT(priv, "Flush Tx\n"); 777 ret = iwlagn_tx_agg_flush(priv, vif, sta, tid); 778 break; 779 case IEEE80211_AMPDU_TX_STOP_CONT: 780 IWL_DEBUG_HT(priv, "stop Tx\n"); 781 ret = iwlagn_tx_agg_stop(priv, vif, sta, tid); 782 if ((ret == 0) && (priv->agg_tids_count > 0)) { 783 priv->agg_tids_count--; 784 IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n", 785 priv->agg_tids_count); 786 } 787 if (!priv->agg_tids_count && 788 priv->hw_params.use_rts_for_aggregation) { 789 /* 790 * switch off RTS/CTS if it was previously enabled 791 */ 792 sta_priv->lq_sta.lq.general_params.flags &= 793 ~LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK; 794 iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif), 795 &sta_priv->lq_sta.lq, CMD_ASYNC, false); 796 } 797 break; 798 case IEEE80211_AMPDU_TX_OPERATIONAL: 799 ret = iwlagn_tx_agg_oper(priv, vif, sta, tid, buf_size); 800 break; 801 } 802 mutex_unlock(&priv->mutex); 803 IWL_DEBUG_MAC80211(priv, "leave\n"); 804 return ret; 805 } 806 807 static int iwlagn_mac_sta_add(struct ieee80211_hw *hw, 808 struct ieee80211_vif *vif, 809 struct ieee80211_sta *sta) 810 { 811 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 812 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv; 813 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv; 814 bool is_ap = vif->type == NL80211_IFTYPE_STATION; 815 int ret; 816 u8 sta_id; 817 818 IWL_DEBUG_INFO(priv, "proceeding to add station %pM\n", 819 sta->addr); 820 sta_priv->sta_id = IWL_INVALID_STATION; 821 822 atomic_set(&sta_priv->pending_frames, 0); 823 if (vif->type == NL80211_IFTYPE_AP) 824 sta_priv->client = true; 825 826 ret = iwl_add_station_common(priv, vif_priv->ctx, sta->addr, 827 is_ap, sta, &sta_id); 828 if (ret) { 829 IWL_ERR(priv, "Unable to add station %pM (%d)\n", 830 sta->addr, ret); 831 /* Should we return success if return code is EEXIST ? */ 832 return ret; 833 } 834 835 sta_priv->sta_id = sta_id; 836 837 return 0; 838 } 839 840 static int iwlagn_mac_sta_remove(struct ieee80211_hw *hw, 841 struct ieee80211_vif *vif, 842 struct ieee80211_sta *sta) 843 { 844 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 845 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv; 846 int ret; 847 848 IWL_DEBUG_INFO(priv, "proceeding to remove station %pM\n", sta->addr); 849 850 if (vif->type == NL80211_IFTYPE_STATION) { 851 /* 852 * Station will be removed from device when the RXON 853 * is set to unassociated -- just deactivate it here 854 * to avoid re-programming it. 855 */ 856 ret = 0; 857 iwl_deactivate_station(priv, sta_priv->sta_id, sta->addr); 858 } else { 859 ret = iwl_remove_station(priv, sta_priv->sta_id, sta->addr); 860 if (ret) 861 IWL_DEBUG_QUIET_RFKILL(priv, 862 "Error removing station %pM\n", sta->addr); 863 } 864 return ret; 865 } 866 867 static int iwlagn_mac_sta_state(struct ieee80211_hw *hw, 868 struct ieee80211_vif *vif, 869 struct ieee80211_sta *sta, 870 enum ieee80211_sta_state old_state, 871 enum ieee80211_sta_state new_state) 872 { 873 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 874 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv; 875 enum { 876 NONE, ADD, REMOVE, HT_RATE_INIT, ADD_RATE_INIT, 877 } op = NONE; 878 int ret; 879 880 IWL_DEBUG_MAC80211(priv, "station %pM state change %d->%d\n", 881 sta->addr, old_state, new_state); 882 883 mutex_lock(&priv->mutex); 884 if (vif->type == NL80211_IFTYPE_STATION) { 885 if (old_state == IEEE80211_STA_NOTEXIST && 886 new_state == IEEE80211_STA_NONE) 887 op = ADD; 888 else if (old_state == IEEE80211_STA_NONE && 889 new_state == IEEE80211_STA_NOTEXIST) 890 op = REMOVE; 891 else if (old_state == IEEE80211_STA_AUTH && 892 new_state == IEEE80211_STA_ASSOC) 893 op = HT_RATE_INIT; 894 } else { 895 if (old_state == IEEE80211_STA_AUTH && 896 new_state == IEEE80211_STA_ASSOC) 897 op = ADD_RATE_INIT; 898 else if (old_state == IEEE80211_STA_ASSOC && 899 new_state == IEEE80211_STA_AUTH) 900 op = REMOVE; 901 } 902 903 switch (op) { 904 case ADD: 905 ret = iwlagn_mac_sta_add(hw, vif, sta); 906 if (ret) 907 break; 908 /* 909 * Clear the in-progress flag, the AP station entry was added 910 * but we'll initialize LQ only when we've associated (which 911 * would also clear the in-progress flag). This is necessary 912 * in case we never initialize LQ because association fails. 913 */ 914 spin_lock_bh(&priv->sta_lock); 915 priv->stations[iwl_sta_id(sta)].used &= 916 ~IWL_STA_UCODE_INPROGRESS; 917 spin_unlock_bh(&priv->sta_lock); 918 break; 919 case REMOVE: 920 ret = iwlagn_mac_sta_remove(hw, vif, sta); 921 break; 922 case ADD_RATE_INIT: 923 ret = iwlagn_mac_sta_add(hw, vif, sta); 924 if (ret) 925 break; 926 /* Initialize rate scaling */ 927 IWL_DEBUG_INFO(priv, 928 "Initializing rate scaling for station %pM\n", 929 sta->addr); 930 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta)); 931 ret = 0; 932 break; 933 case HT_RATE_INIT: 934 /* Initialize rate scaling */ 935 ret = iwl_sta_update_ht(priv, vif_priv->ctx, sta); 936 if (ret) 937 break; 938 IWL_DEBUG_INFO(priv, 939 "Initializing rate scaling for station %pM\n", 940 sta->addr); 941 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta)); 942 ret = 0; 943 break; 944 default: 945 ret = 0; 946 break; 947 } 948 949 /* 950 * mac80211 might WARN if we fail, but due the way we 951 * (badly) handle hard rfkill, we might fail here 952 */ 953 if (iwl_is_rfkill(priv)) 954 ret = 0; 955 956 mutex_unlock(&priv->mutex); 957 IWL_DEBUG_MAC80211(priv, "leave\n"); 958 959 return ret; 960 } 961 962 static void iwlagn_mac_channel_switch(struct ieee80211_hw *hw, 963 struct ieee80211_vif *vif, 964 struct ieee80211_channel_switch *ch_switch) 965 { 966 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 967 struct ieee80211_conf *conf = &hw->conf; 968 struct ieee80211_channel *channel = ch_switch->chandef.chan; 969 struct iwl_ht_config *ht_conf = &priv->current_ht_config; 970 /* 971 * MULTI-FIXME 972 * When we add support for multiple interfaces, we need to 973 * revisit this. The channel switch command in the device 974 * only affects the BSS context, but what does that really 975 * mean? And what if we get a CSA on the second interface? 976 * This needs a lot of work. 977 */ 978 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS]; 979 u16 ch; 980 981 IWL_DEBUG_MAC80211(priv, "enter\n"); 982 983 mutex_lock(&priv->mutex); 984 985 if (iwl_is_rfkill(priv)) 986 goto out; 987 988 if (test_bit(STATUS_EXIT_PENDING, &priv->status) || 989 test_bit(STATUS_SCANNING, &priv->status) || 990 test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status)) 991 goto out; 992 993 if (!iwl_is_associated_ctx(ctx)) 994 goto out; 995 996 if (!priv->lib->set_channel_switch) 997 goto out; 998 999 ch = channel->hw_value; 1000 if (le16_to_cpu(ctx->active.channel) == ch) 1001 goto out; 1002 1003 priv->current_ht_config.smps = conf->smps_mode; 1004 1005 /* Configure HT40 channels */ 1006 switch (cfg80211_get_chandef_type(&ch_switch->chandef)) { 1007 case NL80211_CHAN_NO_HT: 1008 case NL80211_CHAN_HT20: 1009 ctx->ht.is_40mhz = false; 1010 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE; 1011 break; 1012 case NL80211_CHAN_HT40MINUS: 1013 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_BELOW; 1014 ctx->ht.is_40mhz = true; 1015 break; 1016 case NL80211_CHAN_HT40PLUS: 1017 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_ABOVE; 1018 ctx->ht.is_40mhz = true; 1019 break; 1020 } 1021 1022 if ((le16_to_cpu(ctx->staging.channel) != ch)) 1023 ctx->staging.flags = 0; 1024 1025 iwl_set_rxon_channel(priv, channel, ctx); 1026 iwl_set_rxon_ht(priv, ht_conf); 1027 iwl_set_flags_for_band(priv, ctx, channel->band, ctx->vif); 1028 1029 /* 1030 * at this point, staging_rxon has the 1031 * configuration for channel switch 1032 */ 1033 set_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status); 1034 priv->switch_channel = cpu_to_le16(ch); 1035 if (priv->lib->set_channel_switch(priv, ch_switch)) { 1036 clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status); 1037 priv->switch_channel = 0; 1038 ieee80211_chswitch_done(ctx->vif, false); 1039 } 1040 1041 out: 1042 mutex_unlock(&priv->mutex); 1043 IWL_DEBUG_MAC80211(priv, "leave\n"); 1044 } 1045 1046 void iwl_chswitch_done(struct iwl_priv *priv, bool is_success) 1047 { 1048 /* 1049 * MULTI-FIXME 1050 * See iwlagn_mac_channel_switch. 1051 */ 1052 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS]; 1053 1054 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) 1055 return; 1056 1057 if (!test_and_clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status)) 1058 return; 1059 1060 if (ctx->vif) 1061 ieee80211_chswitch_done(ctx->vif, is_success); 1062 } 1063 1064 static void iwlagn_configure_filter(struct ieee80211_hw *hw, 1065 unsigned int changed_flags, 1066 unsigned int *total_flags, 1067 u64 multicast) 1068 { 1069 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1070 __le32 filter_or = 0, filter_nand = 0; 1071 struct iwl_rxon_context *ctx; 1072 1073 #define CHK(test, flag) do { \ 1074 if (*total_flags & (test)) \ 1075 filter_or |= (flag); \ 1076 else \ 1077 filter_nand |= (flag); \ 1078 } while (0) 1079 1080 IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n", 1081 changed_flags, *total_flags); 1082 1083 CHK(FIF_OTHER_BSS, RXON_FILTER_PROMISC_MSK); 1084 /* Setting _just_ RXON_FILTER_CTL2HOST_MSK causes FH errors */ 1085 CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_PROMISC_MSK); 1086 CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK); 1087 1088 #undef CHK 1089 1090 mutex_lock(&priv->mutex); 1091 1092 for_each_context(priv, ctx) { 1093 ctx->staging.filter_flags &= ~filter_nand; 1094 ctx->staging.filter_flags |= filter_or; 1095 1096 /* 1097 * Not committing directly because hardware can perform a scan, 1098 * but we'll eventually commit the filter flags change anyway. 1099 */ 1100 } 1101 1102 mutex_unlock(&priv->mutex); 1103 1104 /* 1105 * Receiving all multicast frames is always enabled by the 1106 * default flags setup in iwl_connection_init_rx_config() 1107 * since we currently do not support programming multicast 1108 * filters into the device. 1109 */ 1110 *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | 1111 FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL; 1112 } 1113 1114 static void iwlagn_mac_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 1115 u32 queues, bool drop) 1116 { 1117 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1118 u32 scd_queues; 1119 1120 mutex_lock(&priv->mutex); 1121 IWL_DEBUG_MAC80211(priv, "enter\n"); 1122 1123 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) { 1124 IWL_DEBUG_TX(priv, "Aborting flush due to device shutdown\n"); 1125 goto done; 1126 } 1127 if (iwl_is_rfkill(priv)) { 1128 IWL_DEBUG_TX(priv, "Aborting flush due to RF Kill\n"); 1129 goto done; 1130 } 1131 1132 scd_queues = BIT(priv->cfg->base_params->num_of_queues) - 1; 1133 scd_queues &= ~(BIT(IWL_IPAN_CMD_QUEUE_NUM) | 1134 BIT(IWL_DEFAULT_CMD_QUEUE_NUM)); 1135 1136 if (drop) { 1137 IWL_DEBUG_TX_QUEUES(priv, "Flushing SCD queues: 0x%x\n", 1138 scd_queues); 1139 if (iwlagn_txfifo_flush(priv, scd_queues)) { 1140 IWL_ERR(priv, "flush request fail\n"); 1141 goto done; 1142 } 1143 } 1144 1145 IWL_DEBUG_TX_QUEUES(priv, "wait transmit/flush all frames\n"); 1146 iwl_trans_wait_tx_queue_empty(priv->trans, scd_queues); 1147 done: 1148 mutex_unlock(&priv->mutex); 1149 IWL_DEBUG_MAC80211(priv, "leave\n"); 1150 } 1151 1152 static void iwlagn_mac_event_callback(struct ieee80211_hw *hw, 1153 struct ieee80211_vif *vif, 1154 const struct ieee80211_event *event) 1155 { 1156 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1157 1158 if (event->type != RSSI_EVENT) 1159 return; 1160 1161 IWL_DEBUG_MAC80211(priv, "enter\n"); 1162 1163 if (priv->lib->bt_params && 1164 priv->lib->bt_params->advanced_bt_coexist) { 1165 if (event->u.rssi.data == RSSI_EVENT_LOW) 1166 priv->bt_enable_pspoll = true; 1167 else if (event->u.rssi.data == RSSI_EVENT_HIGH) 1168 priv->bt_enable_pspoll = false; 1169 1170 queue_work(priv->workqueue, &priv->bt_runtime_config); 1171 } else { 1172 IWL_DEBUG_MAC80211(priv, "Advanced BT coex disabled," 1173 "ignoring RSSI callback\n"); 1174 } 1175 1176 IWL_DEBUG_MAC80211(priv, "leave\n"); 1177 } 1178 1179 static int iwlagn_mac_set_tim(struct ieee80211_hw *hw, 1180 struct ieee80211_sta *sta, bool set) 1181 { 1182 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1183 1184 queue_work(priv->workqueue, &priv->beacon_update); 1185 1186 return 0; 1187 } 1188 1189 static int iwlagn_mac_conf_tx(struct ieee80211_hw *hw, 1190 struct ieee80211_vif *vif, u16 queue, 1191 const struct ieee80211_tx_queue_params *params) 1192 { 1193 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1194 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv; 1195 struct iwl_rxon_context *ctx = vif_priv->ctx; 1196 int q; 1197 1198 if (WARN_ON(!ctx)) 1199 return -EINVAL; 1200 1201 IWL_DEBUG_MAC80211(priv, "enter\n"); 1202 1203 if (!iwl_is_ready_rf(priv)) { 1204 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n"); 1205 return -EIO; 1206 } 1207 1208 if (queue >= AC_NUM) { 1209 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue); 1210 return 0; 1211 } 1212 1213 q = AC_NUM - 1 - queue; 1214 1215 mutex_lock(&priv->mutex); 1216 1217 ctx->qos_data.def_qos_parm.ac[q].cw_min = 1218 cpu_to_le16(params->cw_min); 1219 ctx->qos_data.def_qos_parm.ac[q].cw_max = 1220 cpu_to_le16(params->cw_max); 1221 ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs; 1222 ctx->qos_data.def_qos_parm.ac[q].edca_txop = 1223 cpu_to_le16((params->txop * 32)); 1224 1225 ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0; 1226 1227 mutex_unlock(&priv->mutex); 1228 1229 IWL_DEBUG_MAC80211(priv, "leave\n"); 1230 return 0; 1231 } 1232 1233 static int iwlagn_mac_tx_last_beacon(struct ieee80211_hw *hw) 1234 { 1235 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1236 1237 return priv->ibss_manager == IWL_IBSS_MANAGER; 1238 } 1239 1240 static int iwl_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx) 1241 { 1242 iwl_connection_init_rx_config(priv, ctx); 1243 1244 iwlagn_set_rxon_chain(priv, ctx); 1245 1246 return iwlagn_commit_rxon(priv, ctx); 1247 } 1248 1249 static int iwl_setup_interface(struct iwl_priv *priv, 1250 struct iwl_rxon_context *ctx) 1251 { 1252 struct ieee80211_vif *vif = ctx->vif; 1253 int err, ac; 1254 1255 lockdep_assert_held(&priv->mutex); 1256 1257 /* 1258 * This variable will be correct only when there's just 1259 * a single context, but all code using it is for hardware 1260 * that supports only one context. 1261 */ 1262 priv->iw_mode = vif->type; 1263 1264 ctx->is_active = true; 1265 1266 err = iwl_set_mode(priv, ctx); 1267 if (err) { 1268 if (!ctx->always_active) 1269 ctx->is_active = false; 1270 return err; 1271 } 1272 1273 if (priv->lib->bt_params && priv->lib->bt_params->advanced_bt_coexist && 1274 vif->type == NL80211_IFTYPE_ADHOC) { 1275 /* 1276 * pretend to have high BT traffic as long as we 1277 * are operating in IBSS mode, as this will cause 1278 * the rate scaling etc. to behave as intended. 1279 */ 1280 priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH; 1281 } 1282 1283 /* set up queue mappings */ 1284 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 1285 vif->hw_queue[ac] = ctx->ac_to_queue[ac]; 1286 1287 if (vif->type == NL80211_IFTYPE_AP) 1288 vif->cab_queue = ctx->mcast_queue; 1289 else 1290 vif->cab_queue = IEEE80211_INVAL_HW_QUEUE; 1291 1292 return 0; 1293 } 1294 1295 static int iwlagn_mac_add_interface(struct ieee80211_hw *hw, 1296 struct ieee80211_vif *vif) 1297 { 1298 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1299 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv; 1300 struct iwl_rxon_context *tmp, *ctx = NULL; 1301 int err; 1302 enum nl80211_iftype viftype = ieee80211_vif_type_p2p(vif); 1303 bool reset = false; 1304 1305 IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n", 1306 viftype, vif->addr); 1307 1308 mutex_lock(&priv->mutex); 1309 1310 if (!iwl_is_ready_rf(priv)) { 1311 IWL_WARN(priv, "Try to add interface when device not ready\n"); 1312 err = -EINVAL; 1313 goto out; 1314 } 1315 1316 for_each_context(priv, tmp) { 1317 u32 possible_modes = 1318 tmp->interface_modes | tmp->exclusive_interface_modes; 1319 1320 if (tmp->vif) { 1321 /* On reset we need to add the same interface again */ 1322 if (tmp->vif == vif) { 1323 reset = true; 1324 ctx = tmp; 1325 break; 1326 } 1327 1328 /* check if this busy context is exclusive */ 1329 if (tmp->exclusive_interface_modes & 1330 BIT(tmp->vif->type)) { 1331 err = -EINVAL; 1332 goto out; 1333 } 1334 continue; 1335 } 1336 1337 if (!(possible_modes & BIT(viftype))) 1338 continue; 1339 1340 /* have maybe usable context w/o interface */ 1341 ctx = tmp; 1342 break; 1343 } 1344 1345 if (!ctx) { 1346 err = -EOPNOTSUPP; 1347 goto out; 1348 } 1349 1350 vif_priv->ctx = ctx; 1351 ctx->vif = vif; 1352 1353 /* 1354 * In SNIFFER device type, the firmware reports the FCS to 1355 * the host, rather than snipping it off. Unfortunately, 1356 * mac80211 doesn't (yet) provide a per-packet flag for 1357 * this, so that we have to set the hardware flag based 1358 * on the interfaces added. As the monitor interface can 1359 * only be present by itself, and will be removed before 1360 * other interfaces are added, this is safe. 1361 */ 1362 if (vif->type == NL80211_IFTYPE_MONITOR) 1363 ieee80211_hw_set(priv->hw, RX_INCLUDES_FCS); 1364 else 1365 __clear_bit(IEEE80211_HW_RX_INCLUDES_FCS, priv->hw->flags); 1366 1367 err = iwl_setup_interface(priv, ctx); 1368 if (!err || reset) 1369 goto out; 1370 1371 ctx->vif = NULL; 1372 priv->iw_mode = NL80211_IFTYPE_STATION; 1373 out: 1374 mutex_unlock(&priv->mutex); 1375 1376 IWL_DEBUG_MAC80211(priv, "leave\n"); 1377 return err; 1378 } 1379 1380 static void iwl_teardown_interface(struct iwl_priv *priv, 1381 struct ieee80211_vif *vif, 1382 bool mode_change) 1383 { 1384 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif); 1385 1386 lockdep_assert_held(&priv->mutex); 1387 1388 if (priv->scan_vif == vif) { 1389 iwl_scan_cancel_timeout(priv, 200); 1390 iwl_force_scan_end(priv); 1391 } 1392 1393 if (!mode_change) { 1394 iwl_set_mode(priv, ctx); 1395 if (!ctx->always_active) 1396 ctx->is_active = false; 1397 } 1398 1399 /* 1400 * When removing the IBSS interface, overwrite the 1401 * BT traffic load with the stored one from the last 1402 * notification, if any. If this is a device that 1403 * doesn't implement this, this has no effect since 1404 * both values are the same and zero. 1405 */ 1406 if (vif->type == NL80211_IFTYPE_ADHOC) 1407 priv->bt_traffic_load = priv->last_bt_traffic_load; 1408 } 1409 1410 static void iwlagn_mac_remove_interface(struct ieee80211_hw *hw, 1411 struct ieee80211_vif *vif) 1412 { 1413 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1414 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif); 1415 1416 IWL_DEBUG_MAC80211(priv, "enter\n"); 1417 1418 mutex_lock(&priv->mutex); 1419 1420 WARN_ON(ctx->vif != vif); 1421 ctx->vif = NULL; 1422 1423 iwl_teardown_interface(priv, vif, false); 1424 1425 mutex_unlock(&priv->mutex); 1426 1427 IWL_DEBUG_MAC80211(priv, "leave\n"); 1428 1429 } 1430 1431 static int iwlagn_mac_change_interface(struct ieee80211_hw *hw, 1432 struct ieee80211_vif *vif, 1433 enum nl80211_iftype newtype, bool newp2p) 1434 { 1435 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1436 struct iwl_rxon_context *ctx, *tmp; 1437 enum nl80211_iftype newviftype = newtype; 1438 u32 interface_modes; 1439 int err; 1440 1441 IWL_DEBUG_MAC80211(priv, "enter\n"); 1442 1443 newtype = ieee80211_iftype_p2p(newtype, newp2p); 1444 1445 mutex_lock(&priv->mutex); 1446 1447 ctx = iwl_rxon_ctx_from_vif(vif); 1448 1449 /* 1450 * To simplify this code, only support changes on the 1451 * BSS context. The PAN context is usually reassigned 1452 * by creating/removing P2P interfaces anyway. 1453 */ 1454 if (ctx->ctxid != IWL_RXON_CTX_BSS) { 1455 err = -EBUSY; 1456 goto out; 1457 } 1458 1459 if (!ctx->vif || !iwl_is_ready_rf(priv)) { 1460 /* 1461 * Huh? But wait ... this can maybe happen when 1462 * we're in the middle of a firmware restart! 1463 */ 1464 err = -EBUSY; 1465 goto out; 1466 } 1467 1468 /* Check if the switch is supported in the same context */ 1469 interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes; 1470 if (!(interface_modes & BIT(newtype))) { 1471 err = -EBUSY; 1472 goto out; 1473 } 1474 1475 if (ctx->exclusive_interface_modes & BIT(newtype)) { 1476 for_each_context(priv, tmp) { 1477 if (ctx == tmp) 1478 continue; 1479 1480 if (!tmp->is_active) 1481 continue; 1482 1483 /* 1484 * The current mode switch would be exclusive, but 1485 * another context is active ... refuse the switch. 1486 */ 1487 err = -EBUSY; 1488 goto out; 1489 } 1490 } 1491 1492 /* success */ 1493 iwl_teardown_interface(priv, vif, true); 1494 vif->type = newviftype; 1495 vif->p2p = newp2p; 1496 err = iwl_setup_interface(priv, ctx); 1497 WARN_ON(err); 1498 /* 1499 * We've switched internally, but submitting to the 1500 * device may have failed for some reason. Mask this 1501 * error, because otherwise mac80211 will not switch 1502 * (and set the interface type back) and we'll be 1503 * out of sync with it. 1504 */ 1505 err = 0; 1506 1507 out: 1508 mutex_unlock(&priv->mutex); 1509 IWL_DEBUG_MAC80211(priv, "leave\n"); 1510 1511 return err; 1512 } 1513 1514 static int iwlagn_mac_hw_scan(struct ieee80211_hw *hw, 1515 struct ieee80211_vif *vif, 1516 struct ieee80211_scan_request *hw_req) 1517 { 1518 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1519 struct cfg80211_scan_request *req = &hw_req->req; 1520 int ret; 1521 1522 IWL_DEBUG_MAC80211(priv, "enter\n"); 1523 1524 if (req->n_channels == 0) 1525 return -EINVAL; 1526 1527 mutex_lock(&priv->mutex); 1528 1529 /* 1530 * If an internal scan is in progress, just set 1531 * up the scan_request as per above. 1532 */ 1533 if (priv->scan_type != IWL_SCAN_NORMAL) { 1534 IWL_DEBUG_SCAN(priv, 1535 "SCAN request during internal scan - defer\n"); 1536 priv->scan_request = req; 1537 priv->scan_vif = vif; 1538 ret = 0; 1539 } else { 1540 priv->scan_request = req; 1541 priv->scan_vif = vif; 1542 /* 1543 * mac80211 will only ask for one band at a time 1544 * so using channels[0] here is ok 1545 */ 1546 ret = iwl_scan_initiate(priv, vif, IWL_SCAN_NORMAL, 1547 req->channels[0]->band); 1548 if (ret) { 1549 priv->scan_request = NULL; 1550 priv->scan_vif = NULL; 1551 } 1552 } 1553 1554 IWL_DEBUG_MAC80211(priv, "leave\n"); 1555 1556 mutex_unlock(&priv->mutex); 1557 1558 return ret; 1559 } 1560 1561 static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id) 1562 { 1563 struct iwl_addsta_cmd cmd = { 1564 .mode = STA_CONTROL_MODIFY_MSK, 1565 .station_flags_msk = STA_FLG_PWR_SAVE_MSK, 1566 .sta.sta_id = sta_id, 1567 }; 1568 1569 iwl_send_add_sta(priv, &cmd, CMD_ASYNC); 1570 } 1571 1572 static void iwlagn_mac_sta_notify(struct ieee80211_hw *hw, 1573 struct ieee80211_vif *vif, 1574 enum sta_notify_cmd cmd, 1575 struct ieee80211_sta *sta) 1576 { 1577 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 1578 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv; 1579 int sta_id; 1580 1581 IWL_DEBUG_MAC80211(priv, "enter\n"); 1582 1583 switch (cmd) { 1584 case STA_NOTIFY_SLEEP: 1585 WARN_ON(!sta_priv->client); 1586 sta_priv->asleep = true; 1587 if (atomic_read(&sta_priv->pending_frames) > 0) 1588 ieee80211_sta_block_awake(hw, sta, true); 1589 break; 1590 case STA_NOTIFY_AWAKE: 1591 WARN_ON(!sta_priv->client); 1592 if (!sta_priv->asleep) 1593 break; 1594 sta_priv->asleep = false; 1595 sta_id = iwl_sta_id(sta); 1596 if (sta_id != IWL_INVALID_STATION) 1597 iwl_sta_modify_ps_wake(priv, sta_id); 1598 break; 1599 default: 1600 break; 1601 } 1602 IWL_DEBUG_MAC80211(priv, "leave\n"); 1603 } 1604 1605 const struct ieee80211_ops iwlagn_hw_ops = { 1606 .tx = iwlagn_mac_tx, 1607 .start = iwlagn_mac_start, 1608 .stop = iwlagn_mac_stop, 1609 #ifdef CONFIG_PM_SLEEP 1610 .suspend = iwlagn_mac_suspend, 1611 .resume = iwlagn_mac_resume, 1612 .set_wakeup = iwlagn_mac_set_wakeup, 1613 #endif 1614 .add_interface = iwlagn_mac_add_interface, 1615 .remove_interface = iwlagn_mac_remove_interface, 1616 .change_interface = iwlagn_mac_change_interface, 1617 .config = iwlagn_mac_config, 1618 .configure_filter = iwlagn_configure_filter, 1619 .set_key = iwlagn_mac_set_key, 1620 .update_tkip_key = iwlagn_mac_update_tkip_key, 1621 .set_rekey_data = iwlagn_mac_set_rekey_data, 1622 .conf_tx = iwlagn_mac_conf_tx, 1623 .bss_info_changed = iwlagn_bss_info_changed, 1624 .ampdu_action = iwlagn_mac_ampdu_action, 1625 .hw_scan = iwlagn_mac_hw_scan, 1626 .sta_notify = iwlagn_mac_sta_notify, 1627 .sta_state = iwlagn_mac_sta_state, 1628 .channel_switch = iwlagn_mac_channel_switch, 1629 .flush = iwlagn_mac_flush, 1630 .tx_last_beacon = iwlagn_mac_tx_last_beacon, 1631 .event_callback = iwlagn_mac_event_callback, 1632 .set_tim = iwlagn_mac_set_tim, 1633 }; 1634 1635 /* This function both allocates and initializes hw and priv. */ 1636 struct ieee80211_hw *iwl_alloc_all(void) 1637 { 1638 struct iwl_priv *priv; 1639 struct iwl_op_mode *op_mode; 1640 /* mac80211 allocates memory for this device instance, including 1641 * space for this driver's private structure */ 1642 struct ieee80211_hw *hw; 1643 1644 hw = ieee80211_alloc_hw(sizeof(struct iwl_priv) + 1645 sizeof(struct iwl_op_mode), &iwlagn_hw_ops); 1646 if (!hw) 1647 goto out; 1648 1649 op_mode = hw->priv; 1650 priv = IWL_OP_MODE_GET_DVM(op_mode); 1651 priv->hw = hw; 1652 1653 out: 1654 return hw; 1655 } 1656