1624 lines · c
1// SPDX-License-Identifier: GPL-2.0-only2/******************************************************************************3 *4 * Copyright(c) 2003 - 2014 Intel Corporation. All rights reserved.5 * Copyright(C) 2018 - 2019, 2022 - 2024 Intel Corporation6 *7 * Portions of this file are derived from the ipw3945 project, as well8 * as portions of the ieee80211 subsystem header files.9 *****************************************************************************/10#include <linux/kernel.h>11#include <linux/module.h>12#include <linux/slab.h>13#include <linux/dma-mapping.h>14#include <linux/delay.h>15#include <linux/sched.h>16#include <linux/skbuff.h>17#include <linux/netdevice.h>18#include <linux/etherdevice.h>19#include <linux/if_arp.h>20 21#include <net/ieee80211_radiotap.h>22#include <net/mac80211.h>23 24#include <asm/div64.h>25 26#include "iwl-io.h"27#include "iwl-trans.h"28#include "iwl-op-mode.h"29#include "iwl-modparams.h"30 31#include "dev.h"32#include "calib.h"33#include "agn.h"34 35/*****************************************************************************36 *37 * mac80211 entry point functions38 *39 *****************************************************************************/40 41static const struct ieee80211_iface_limit iwlagn_sta_ap_limits[] = {42 {43 .max = 1,44 .types = BIT(NL80211_IFTYPE_STATION),45 },46 {47 .max = 1,48 .types = BIT(NL80211_IFTYPE_AP),49 },50};51 52static const struct ieee80211_iface_limit iwlagn_2sta_limits[] = {53 {54 .max = 2,55 .types = BIT(NL80211_IFTYPE_STATION),56 },57};58 59static const struct ieee80211_iface_combination60iwlagn_iface_combinations_dualmode[] = {61 { .num_different_channels = 1,62 .max_interfaces = 2,63 .beacon_int_infra_match = true,64 .limits = iwlagn_sta_ap_limits,65 .n_limits = ARRAY_SIZE(iwlagn_sta_ap_limits),66 },67 { .num_different_channels = 1,68 .max_interfaces = 2,69 .limits = iwlagn_2sta_limits,70 .n_limits = ARRAY_SIZE(iwlagn_2sta_limits),71 },72};73 74/*75 * Not a mac80211 entry point function, but it fits in with all the76 * other mac80211 functions grouped here.77 */78int iwlagn_mac_setup_register(struct iwl_priv *priv,79 const struct iwl_ucode_capabilities *capa)80{81 int ret;82 struct ieee80211_hw *hw = priv->hw;83 struct iwl_rxon_context *ctx;84 85 hw->rate_control_algorithm = "iwl-agn-rs";86 87 /* Tell mac80211 our characteristics */88 ieee80211_hw_set(hw, SIGNAL_DBM);89 ieee80211_hw_set(hw, AMPDU_AGGREGATION);90 ieee80211_hw_set(hw, NEED_DTIM_BEFORE_ASSOC);91 ieee80211_hw_set(hw, SPECTRUM_MGMT);92 ieee80211_hw_set(hw, REPORTS_TX_ACK_STATUS);93 ieee80211_hw_set(hw, QUEUE_CONTROL);94 ieee80211_hw_set(hw, SUPPORTS_PS);95 ieee80211_hw_set(hw, SUPPORTS_DYNAMIC_PS);96 ieee80211_hw_set(hw, SUPPORT_FAST_XMIT);97 ieee80211_hw_set(hw, WANT_MONITOR_VIF);98 99 if (priv->trans->max_skb_frags)100 hw->netdev_features = NETIF_F_HIGHDMA | NETIF_F_SG;101 102 hw->offchannel_tx_hw_queue = IWL_AUX_QUEUE;103 hw->radiotap_mcs_details |= IEEE80211_RADIOTAP_MCS_HAVE_FMT;104 105 /*106 * Including the following line will crash some AP's. This107 * workaround removes the stimulus which causes the crash until108 * the AP software can be fixed.109 hw->max_tx_aggregation_subframes = LINK_QUAL_AGG_FRAME_LIMIT_DEF;110 */111 112 if (priv->nvm_data->sku_cap_11n_enable)113 hw->wiphy->features |= NL80211_FEATURE_DYNAMIC_SMPS |114 NL80211_FEATURE_STATIC_SMPS;115 116 /*117 * Enable 11w if advertised by firmware and software crypto118 * is not enabled (as the firmware will interpret some mgmt119 * packets, so enabling it with software crypto isn't safe)120 */121 if (priv->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_MFP &&122 !iwlwifi_mod_params.swcrypto)123 ieee80211_hw_set(hw, MFP_CAPABLE);124 125 hw->sta_data_size = sizeof(struct iwl_station_priv);126 hw->vif_data_size = sizeof(struct iwl_vif_priv);127 128 for_each_context(priv, ctx) {129 hw->wiphy->interface_modes |= ctx->interface_modes;130 hw->wiphy->interface_modes |= ctx->exclusive_interface_modes;131 }132 133 BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);134 135 if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {136 hw->wiphy->iface_combinations =137 iwlagn_iface_combinations_dualmode;138 hw->wiphy->n_iface_combinations =139 ARRAY_SIZE(iwlagn_iface_combinations_dualmode);140 }141 142 hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN;143 hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG |144 REGULATORY_DISABLE_BEACON_HINTS;145 146#ifdef CONFIG_PM_SLEEP147 if (priv->fw->img[IWL_UCODE_WOWLAN].num_sec &&148 device_can_wakeup(priv->trans->dev)) {149 priv->wowlan_support.flags = WIPHY_WOWLAN_MAGIC_PKT |150 WIPHY_WOWLAN_DISCONNECT |151 WIPHY_WOWLAN_EAP_IDENTITY_REQ |152 WIPHY_WOWLAN_RFKILL_RELEASE;153 if (!iwlwifi_mod_params.swcrypto)154 priv->wowlan_support.flags |=155 WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |156 WIPHY_WOWLAN_GTK_REKEY_FAILURE;157 158 priv->wowlan_support.n_patterns = IWLAGN_WOWLAN_MAX_PATTERNS;159 priv->wowlan_support.pattern_min_len =160 IWLAGN_WOWLAN_MIN_PATTERN_LEN;161 priv->wowlan_support.pattern_max_len =162 IWLAGN_WOWLAN_MAX_PATTERN_LEN;163 hw->wiphy->wowlan = &priv->wowlan_support;164 }165#endif166 167 if (iwlwifi_mod_params.power_save)168 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;169 else170 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;171 172 hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;173 /* we create the 802.11 header and a max-length SSID element */174 hw->wiphy->max_scan_ie_len = capa->max_probe_length - 24 - 34;175 176 /*177 * We don't use all queues: 4 and 9 are unused and any178 * aggregation queue gets mapped down to the AC queue.179 */180 hw->queues = IWLAGN_FIRST_AMPDU_QUEUE;181 182 hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;183 184 if (priv->nvm_data->bands[NL80211_BAND_2GHZ].n_channels)185 priv->hw->wiphy->bands[NL80211_BAND_2GHZ] =186 &priv->nvm_data->bands[NL80211_BAND_2GHZ];187 if (priv->nvm_data->bands[NL80211_BAND_5GHZ].n_channels)188 priv->hw->wiphy->bands[NL80211_BAND_5GHZ] =189 &priv->nvm_data->bands[NL80211_BAND_5GHZ];190 191 hw->wiphy->hw_version = priv->trans->hw_id;192 193 iwl_leds_init(priv);194 195 wiphy_ext_feature_set(hw->wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST);196 wiphy_ext_feature_set(hw->wiphy, NL80211_EXT_FEATURE_EXT_KEY_ID);197 198 ret = ieee80211_register_hw(priv->hw);199 if (ret) {200 IWL_ERR(priv, "Failed to register hw (error %d)\n", ret);201 iwl_leds_exit(priv);202 return ret;203 }204 priv->mac80211_registered = 1;205 206 return 0;207}208 209void iwlagn_mac_unregister(struct iwl_priv *priv)210{211 if (!priv->mac80211_registered)212 return;213 iwl_leds_exit(priv);214 ieee80211_unregister_hw(priv->hw);215 priv->mac80211_registered = 0;216}217 218static int __iwl_up(struct iwl_priv *priv)219{220 struct iwl_rxon_context *ctx;221 int ret;222 223 lockdep_assert_held(&priv->mutex);224 225 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {226 IWL_WARN(priv, "Exit pending; will not bring the NIC up\n");227 return -EIO;228 }229 230 for_each_context(priv, ctx) {231 ret = iwlagn_alloc_bcast_station(priv, ctx);232 if (ret) {233 iwl_dealloc_bcast_stations(priv);234 return ret;235 }236 }237 238 ret = iwl_trans_start_hw(priv->trans);239 if (ret) {240 IWL_ERR(priv, "Failed to start HW: %d\n", ret);241 goto error;242 }243 244 ret = iwl_run_init_ucode(priv);245 if (ret) {246 IWL_ERR(priv, "Failed to run INIT ucode: %d\n", ret);247 goto error;248 }249 250 ret = iwl_trans_start_hw(priv->trans);251 if (ret) {252 IWL_ERR(priv, "Failed to start HW: %d\n", ret);253 goto error;254 }255 256 ret = iwl_load_ucode_wait_alive(priv, IWL_UCODE_REGULAR);257 if (ret) {258 IWL_ERR(priv, "Failed to start RT ucode: %d\n", ret);259 goto error;260 }261 262 ret = iwl_alive_start(priv);263 if (ret)264 goto error;265 return 0;266 267 error:268 set_bit(STATUS_EXIT_PENDING, &priv->status);269 iwl_down(priv);270 clear_bit(STATUS_EXIT_PENDING, &priv->status);271 272 IWL_ERR(priv, "Unable to initialize device.\n");273 return ret;274}275 276static int iwlagn_mac_start(struct ieee80211_hw *hw)277{278 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);279 int ret;280 281 IWL_DEBUG_MAC80211(priv, "enter\n");282 283 /* we should be verifying the device is ready to be opened */284 mutex_lock(&priv->mutex);285 ret = __iwl_up(priv);286 mutex_unlock(&priv->mutex);287 if (ret)288 return ret;289 290 IWL_DEBUG_INFO(priv, "Start UP work done.\n");291 292 /* Now we should be done, and the READY bit should be set. */293 if (WARN_ON(!test_bit(STATUS_READY, &priv->status)))294 ret = -EIO;295 296 iwlagn_led_enable(priv);297 298 priv->is_open = 1;299 IWL_DEBUG_MAC80211(priv, "leave\n");300 return ret;301}302 303static void iwlagn_mac_stop(struct ieee80211_hw *hw, bool suspend)304{305 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);306 307 IWL_DEBUG_MAC80211(priv, "enter\n");308 309 if (!priv->is_open)310 return;311 312 priv->is_open = 0;313 314 mutex_lock(&priv->mutex);315 iwl_down(priv);316 mutex_unlock(&priv->mutex);317 318 iwl_cancel_deferred_work(priv);319 320 flush_workqueue(priv->workqueue);321 322 IWL_DEBUG_MAC80211(priv, "leave\n");323}324 325static void iwlagn_mac_set_rekey_data(struct ieee80211_hw *hw,326 struct ieee80211_vif *vif,327 struct cfg80211_gtk_rekey_data *data)328{329 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);330 331 if (iwlwifi_mod_params.swcrypto)332 return;333 334 IWL_DEBUG_MAC80211(priv, "enter\n");335 mutex_lock(&priv->mutex);336 337 if (priv->contexts[IWL_RXON_CTX_BSS].vif != vif)338 goto out;339 340 memcpy(priv->kek, data->kek, NL80211_KEK_LEN);341 memcpy(priv->kck, data->kck, NL80211_KCK_LEN);342 priv->replay_ctr =343 cpu_to_le64(be64_to_cpup((__be64 *)&data->replay_ctr));344 priv->have_rekey_data = true;345 346 out:347 mutex_unlock(&priv->mutex);348 IWL_DEBUG_MAC80211(priv, "leave\n");349}350 351#ifdef CONFIG_PM_SLEEP352 353static int iwlagn_mac_suspend(struct ieee80211_hw *hw,354 struct cfg80211_wowlan *wowlan)355{356 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);357 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];358 int ret;359 360 if (WARN_ON(!wowlan))361 return -EINVAL;362 363 IWL_DEBUG_MAC80211(priv, "enter\n");364 mutex_lock(&priv->mutex);365 366 /* Don't attempt WoWLAN when not associated, tear down instead. */367 if (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION ||368 !iwl_is_associated_ctx(ctx)) {369 ret = 1;370 goto out;371 }372 373 ret = iwlagn_suspend(priv, wowlan);374 if (ret)375 goto error;376 377 /* let the ucode operate on its own */378 iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_SET,379 CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE);380 381 iwl_trans_d3_suspend(priv->trans, false, true);382 383 goto out;384 385 error:386 priv->wowlan = false;387 iwlagn_prepare_restart(priv);388 ieee80211_restart_hw(priv->hw);389 out:390 mutex_unlock(&priv->mutex);391 IWL_DEBUG_MAC80211(priv, "leave\n");392 393 return ret;394}395 396struct iwl_resume_data {397 struct iwl_priv *priv;398 struct iwlagn_wowlan_status *cmd;399 bool valid;400};401 402static bool iwl_resume_status_fn(struct iwl_notif_wait_data *notif_wait,403 struct iwl_rx_packet *pkt, void *data)404{405 struct iwl_resume_data *resume_data = data;406 struct iwl_priv *priv = resume_data->priv;407 408 if (iwl_rx_packet_payload_len(pkt) != sizeof(*resume_data->cmd)) {409 IWL_ERR(priv, "rx wrong size data\n");410 return true;411 }412 memcpy(resume_data->cmd, pkt->data, sizeof(*resume_data->cmd));413 resume_data->valid = true;414 415 return true;416}417 418static int iwlagn_mac_resume(struct ieee80211_hw *hw)419{420 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);421 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];422 struct ieee80211_vif *vif;423 u32 base;424 int ret;425 enum iwl_d3_status d3_status;426 struct error_table_start {427 /* cf. struct iwl_error_event_table */428 u32 valid;429 u32 error_id;430 } err_info;431 struct iwl_notification_wait status_wait;432 static const u16 status_cmd[] = {433 REPLY_WOWLAN_GET_STATUS,434 };435 struct iwlagn_wowlan_status status_data = {};436 struct iwl_resume_data resume_data = {437 .priv = priv,438 .cmd = &status_data,439 .valid = false,440 };441 struct cfg80211_wowlan_wakeup wakeup = {442 .pattern_idx = -1,443 };444#ifdef CONFIG_IWLWIFI_DEBUGFS445 const struct fw_img *img;446#endif447 448 IWL_DEBUG_MAC80211(priv, "enter\n");449 mutex_lock(&priv->mutex);450 451 /* we'll clear ctx->vif during iwlagn_prepare_restart() */452 vif = ctx->vif;453 454 ret = iwl_trans_d3_resume(priv->trans, &d3_status, false, true);455 if (ret)456 goto out_unlock;457 458 if (d3_status != IWL_D3_STATUS_ALIVE) {459 IWL_INFO(priv, "Device was reset during suspend\n");460 goto out_unlock;461 }462 463 /* uCode is no longer operating by itself */464 iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_CLR,465 CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE);466 467 base = priv->device_pointers.error_event_table;468 if (!iwlagn_hw_valid_rtc_data_addr(base)) {469 IWL_WARN(priv, "Invalid error table during resume!\n");470 goto out_unlock;471 }472 473 iwl_trans_read_mem_bytes(priv->trans, base,474 &err_info, sizeof(err_info));475 476 if (err_info.valid) {477 IWL_INFO(priv, "error table is valid (%d, 0x%x)\n",478 err_info.valid, err_info.error_id);479 if (err_info.error_id == RF_KILL_INDICATOR_FOR_WOWLAN) {480 wakeup.rfkill_release = true;481 ieee80211_report_wowlan_wakeup(vif, &wakeup,482 GFP_KERNEL);483 }484 goto out_unlock;485 }486 487#ifdef CONFIG_IWLWIFI_DEBUGFS488 img = &priv->fw->img[IWL_UCODE_WOWLAN];489 if (!priv->wowlan_sram)490 priv->wowlan_sram =491 kzalloc(img->sec[IWL_UCODE_SECTION_DATA].len,492 GFP_KERNEL);493 494 if (priv->wowlan_sram)495 iwl_trans_read_mem(priv->trans, 0x800000,496 priv->wowlan_sram,497 img->sec[IWL_UCODE_SECTION_DATA].len / 4);498#endif499 500 /*501 * This is very strange. The GET_STATUS command is sent but the device502 * doesn't reply properly, it seems it doesn't close the RBD so one is503 * always left open ... As a result, we need to send another command504 * and have to reset the driver afterwards. As we need to switch to505 * runtime firmware again that'll happen.506 */507 508 iwl_init_notification_wait(&priv->notif_wait, &status_wait, status_cmd,509 ARRAY_SIZE(status_cmd), iwl_resume_status_fn,510 &resume_data);511 512 iwl_dvm_send_cmd_pdu(priv, REPLY_WOWLAN_GET_STATUS, CMD_ASYNC, 0, NULL);513 iwl_dvm_send_cmd_pdu(priv, REPLY_ECHO, CMD_ASYNC, 0, NULL);514 /* an RBD is left open in the firmware now! */515 516 ret = iwl_wait_notification(&priv->notif_wait, &status_wait, HZ/5);517 if (ret)518 goto out_unlock;519 520 if (resume_data.valid && priv->contexts[IWL_RXON_CTX_BSS].vif) {521 u32 reasons = le32_to_cpu(status_data.wakeup_reason);522 struct cfg80211_wowlan_wakeup *wakeup_report;523 524 IWL_INFO(priv, "WoWLAN wakeup reason(s): 0x%.8x\n", reasons);525 526 if (reasons) {527 if (reasons & IWLAGN_WOWLAN_WAKEUP_MAGIC_PACKET)528 wakeup.magic_pkt = true;529 if (reasons & IWLAGN_WOWLAN_WAKEUP_PATTERN_MATCH)530 wakeup.pattern_idx = status_data.pattern_number;531 if (reasons & (IWLAGN_WOWLAN_WAKEUP_BEACON_MISS |532 IWLAGN_WOWLAN_WAKEUP_LINK_CHANGE))533 wakeup.disconnect = true;534 if (reasons & IWLAGN_WOWLAN_WAKEUP_GTK_REKEY_FAIL)535 wakeup.gtk_rekey_failure = true;536 if (reasons & IWLAGN_WOWLAN_WAKEUP_EAP_IDENT_REQ)537 wakeup.eap_identity_req = true;538 if (reasons & IWLAGN_WOWLAN_WAKEUP_4WAY_HANDSHAKE)539 wakeup.four_way_handshake = true;540 wakeup_report = &wakeup;541 } else {542 wakeup_report = NULL;543 }544 545 ieee80211_report_wowlan_wakeup(vif, wakeup_report, GFP_KERNEL);546 }547 548 priv->wowlan = false;549 550 iwlagn_prepare_restart(priv);551 552 memset((void *)&ctx->active, 0, sizeof(ctx->active));553 iwl_connection_init_rx_config(priv, ctx);554 iwlagn_set_rxon_chain(priv, ctx);555 556 out_unlock:557 mutex_unlock(&priv->mutex);558 IWL_DEBUG_MAC80211(priv, "leave\n");559 560 ieee80211_resume_disconnect(vif);561 562 return 1;563}564 565static void iwlagn_mac_set_wakeup(struct ieee80211_hw *hw, bool enabled)566{567 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);568 569 device_set_wakeup_enable(priv->trans->dev, enabled);570}571#endif572 573static void iwlagn_mac_tx(struct ieee80211_hw *hw,574 struct ieee80211_tx_control *control,575 struct sk_buff *skb)576{577 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);578 579 if (iwlagn_tx_skb(priv, control->sta, skb))580 ieee80211_free_txskb(hw, skb);581}582 583static void iwlagn_mac_update_tkip_key(struct ieee80211_hw *hw,584 struct ieee80211_vif *vif,585 struct ieee80211_key_conf *keyconf,586 struct ieee80211_sta *sta,587 u32 iv32, u16 *phase1key)588{589 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);590 591 iwl_update_tkip_key(priv, vif, keyconf, sta, iv32, phase1key);592}593 594static int iwlagn_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,595 struct ieee80211_vif *vif,596 struct ieee80211_sta *sta,597 struct ieee80211_key_conf *key)598{599 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);600 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;601 struct iwl_rxon_context *ctx = vif_priv->ctx;602 int ret;603 bool is_default_wep_key = false;604 605 IWL_DEBUG_MAC80211(priv, "enter\n");606 607 if (iwlwifi_mod_params.swcrypto) {608 IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n");609 return -EOPNOTSUPP;610 }611 612 switch (key->cipher) {613 case WLAN_CIPHER_SUITE_TKIP:614 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;615 fallthrough;616 case WLAN_CIPHER_SUITE_CCMP:617 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;618 break;619 default:620 break;621 }622 623 /*624 * We could program these keys into the hardware as well, but we625 * don't expect much multicast traffic in IBSS and having keys626 * for more stations is probably more useful.627 *628 * Mark key TX-only and return 0.629 */630 if (vif->type == NL80211_IFTYPE_ADHOC &&631 !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {632 key->hw_key_idx = WEP_INVALID_OFFSET;633 return 0;634 }635 636 /* If they key was TX-only, accept deletion */637 if (cmd == DISABLE_KEY && key->hw_key_idx == WEP_INVALID_OFFSET)638 return 0;639 640 mutex_lock(&priv->mutex);641 iwl_scan_cancel_timeout(priv, 100);642 643 BUILD_BUG_ON(WEP_INVALID_OFFSET == IWLAGN_HW_KEY_DEFAULT);644 645 /*646 * If we are getting WEP group key and we didn't receive any key mapping647 * so far, we are in legacy wep mode (group key only), otherwise we are648 * in 1X mode.649 * In legacy wep mode, we use another host command to the uCode.650 */651 if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 ||652 key->cipher == WLAN_CIPHER_SUITE_WEP104) && !sta) {653 if (cmd == SET_KEY)654 is_default_wep_key = !ctx->key_mapping_keys;655 else656 is_default_wep_key =657 key->hw_key_idx == IWLAGN_HW_KEY_DEFAULT;658 }659 660 661 switch (cmd) {662 case SET_KEY:663 if (is_default_wep_key) {664 ret = iwl_set_default_wep_key(priv, vif_priv->ctx, key);665 break;666 }667 ret = iwl_set_dynamic_key(priv, vif_priv->ctx, key, sta);668 if (ret) {669 /*670 * can't add key for RX, but we don't need it671 * in the device for TX so still return 0672 */673 ret = 0;674 key->hw_key_idx = WEP_INVALID_OFFSET;675 }676 677 IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n");678 break;679 case DISABLE_KEY:680 if (is_default_wep_key)681 ret = iwl_remove_default_wep_key(priv, ctx, key);682 else683 ret = iwl_remove_dynamic_key(priv, ctx, key, sta);684 685 IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n");686 break;687 default:688 ret = -EINVAL;689 }690 691 mutex_unlock(&priv->mutex);692 IWL_DEBUG_MAC80211(priv, "leave\n");693 694 return ret;695}696 697static int iwlagn_mac_ampdu_action(struct ieee80211_hw *hw,698 struct ieee80211_vif *vif,699 struct ieee80211_ampdu_params *params)700{701 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);702 int ret = -EINVAL;703 struct ieee80211_sta *sta = params->sta;704 enum ieee80211_ampdu_mlme_action action = params->action;705 u16 tid = params->tid;706 u16 *ssn = ¶ms->ssn;707 u8 buf_size = params->buf_size;708 struct iwl_station_priv *sta_priv = (void *) sta->drv_priv;709 710 IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n",711 sta->addr, tid);712 713 if (!(priv->nvm_data->sku_cap_11n_enable))714 return -EACCES;715 716 IWL_DEBUG_MAC80211(priv, "enter\n");717 mutex_lock(&priv->mutex);718 719 switch (action) {720 case IEEE80211_AMPDU_RX_START:721 if (!iwl_enable_rx_ampdu())722 break;723 IWL_DEBUG_HT(priv, "start Rx\n");724 ret = iwl_sta_rx_agg_start(priv, sta, tid, *ssn);725 break;726 case IEEE80211_AMPDU_RX_STOP:727 IWL_DEBUG_HT(priv, "stop Rx\n");728 ret = iwl_sta_rx_agg_stop(priv, sta, tid);729 break;730 case IEEE80211_AMPDU_TX_START:731 if (!iwl_enable_tx_ampdu())732 break;733 IWL_DEBUG_HT(priv, "start Tx\n");734 ret = iwlagn_tx_agg_start(priv, vif, sta, tid, ssn);735 break;736 case IEEE80211_AMPDU_TX_STOP_FLUSH:737 case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:738 IWL_DEBUG_HT(priv, "Flush Tx\n");739 ret = iwlagn_tx_agg_flush(priv, vif, sta, tid);740 break;741 case IEEE80211_AMPDU_TX_STOP_CONT:742 IWL_DEBUG_HT(priv, "stop Tx\n");743 ret = iwlagn_tx_agg_stop(priv, vif, sta, tid);744 if ((ret == 0) && (priv->agg_tids_count > 0)) {745 priv->agg_tids_count--;746 IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n",747 priv->agg_tids_count);748 }749 if (!priv->agg_tids_count &&750 priv->hw_params.use_rts_for_aggregation) {751 /*752 * switch off RTS/CTS if it was previously enabled753 */754 sta_priv->lq_sta.lq.general_params.flags &=755 ~LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK;756 iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif),757 &sta_priv->lq_sta.lq, CMD_ASYNC, false);758 }759 break;760 case IEEE80211_AMPDU_TX_OPERATIONAL:761 ret = iwlagn_tx_agg_oper(priv, vif, sta, tid, buf_size);762 break;763 }764 mutex_unlock(&priv->mutex);765 IWL_DEBUG_MAC80211(priv, "leave\n");766 return ret;767}768 769static int iwlagn_mac_sta_add(struct ieee80211_hw *hw,770 struct ieee80211_vif *vif,771 struct ieee80211_sta *sta)772{773 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);774 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;775 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;776 bool is_ap = vif->type == NL80211_IFTYPE_STATION;777 int ret;778 u8 sta_id;779 780 IWL_DEBUG_INFO(priv, "proceeding to add station %pM\n",781 sta->addr);782 sta_priv->sta_id = IWL_INVALID_STATION;783 784 atomic_set(&sta_priv->pending_frames, 0);785 if (vif->type == NL80211_IFTYPE_AP)786 sta_priv->client = true;787 788 ret = iwl_add_station_common(priv, vif_priv->ctx, sta->addr,789 is_ap, sta, &sta_id);790 if (ret) {791 IWL_ERR(priv, "Unable to add station %pM (%d)\n",792 sta->addr, ret);793 /* Should we return success if return code is EEXIST ? */794 return ret;795 }796 797 sta_priv->sta_id = sta_id;798 799 return 0;800}801 802static int iwlagn_mac_sta_remove(struct ieee80211_hw *hw,803 struct ieee80211_vif *vif,804 struct ieee80211_sta *sta)805{806 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);807 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;808 int ret;809 810 IWL_DEBUG_INFO(priv, "proceeding to remove station %pM\n", sta->addr);811 812 if (vif->type == NL80211_IFTYPE_STATION) {813 /*814 * Station will be removed from device when the RXON815 * is set to unassociated -- just deactivate it here816 * to avoid re-programming it.817 */818 ret = 0;819 iwl_deactivate_station(priv, sta_priv->sta_id, sta->addr);820 } else {821 ret = iwl_remove_station(priv, sta_priv->sta_id, sta->addr);822 if (ret)823 IWL_DEBUG_QUIET_RFKILL(priv,824 "Error removing station %pM\n", sta->addr);825 }826 return ret;827}828 829static int iwlagn_mac_sta_state(struct ieee80211_hw *hw,830 struct ieee80211_vif *vif,831 struct ieee80211_sta *sta,832 enum ieee80211_sta_state old_state,833 enum ieee80211_sta_state new_state)834{835 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);836 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;837 enum {838 NONE, ADD, REMOVE, HT_RATE_INIT, ADD_RATE_INIT,839 } op = NONE;840 int ret;841 842 IWL_DEBUG_MAC80211(priv, "station %pM state change %d->%d\n",843 sta->addr, old_state, new_state);844 845 mutex_lock(&priv->mutex);846 if (vif->type == NL80211_IFTYPE_STATION) {847 if (old_state == IEEE80211_STA_NOTEXIST &&848 new_state == IEEE80211_STA_NONE)849 op = ADD;850 else if (old_state == IEEE80211_STA_NONE &&851 new_state == IEEE80211_STA_NOTEXIST)852 op = REMOVE;853 else if (old_state == IEEE80211_STA_AUTH &&854 new_state == IEEE80211_STA_ASSOC)855 op = HT_RATE_INIT;856 } else {857 if (old_state == IEEE80211_STA_AUTH &&858 new_state == IEEE80211_STA_ASSOC)859 op = ADD_RATE_INIT;860 else if (old_state == IEEE80211_STA_ASSOC &&861 new_state == IEEE80211_STA_AUTH)862 op = REMOVE;863 }864 865 switch (op) {866 case ADD:867 ret = iwlagn_mac_sta_add(hw, vif, sta);868 if (ret)869 break;870 /*871 * Clear the in-progress flag, the AP station entry was added872 * but we'll initialize LQ only when we've associated (which873 * would also clear the in-progress flag). This is necessary874 * in case we never initialize LQ because association fails.875 */876 spin_lock_bh(&priv->sta_lock);877 priv->stations[iwl_sta_id(sta)].used &=878 ~IWL_STA_UCODE_INPROGRESS;879 spin_unlock_bh(&priv->sta_lock);880 break;881 case REMOVE:882 ret = iwlagn_mac_sta_remove(hw, vif, sta);883 break;884 case ADD_RATE_INIT:885 ret = iwlagn_mac_sta_add(hw, vif, sta);886 if (ret)887 break;888 /* Initialize rate scaling */889 IWL_DEBUG_INFO(priv,890 "Initializing rate scaling for station %pM\n",891 sta->addr);892 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta));893 ret = 0;894 break;895 case HT_RATE_INIT:896 /* Initialize rate scaling */897 ret = iwl_sta_update_ht(priv, vif_priv->ctx, sta);898 if (ret)899 break;900 IWL_DEBUG_INFO(priv,901 "Initializing rate scaling for station %pM\n",902 sta->addr);903 iwl_rs_rate_init(priv, sta, iwl_sta_id(sta));904 ret = 0;905 break;906 default:907 ret = 0;908 break;909 }910 911 /*912 * mac80211 might WARN if we fail, but due the way we913 * (badly) handle hard rfkill, we might fail here914 */915 if (iwl_is_rfkill(priv))916 ret = 0;917 918 mutex_unlock(&priv->mutex);919 IWL_DEBUG_MAC80211(priv, "leave\n");920 921 return ret;922}923 924static void iwlagn_mac_channel_switch(struct ieee80211_hw *hw,925 struct ieee80211_vif *vif,926 struct ieee80211_channel_switch *ch_switch)927{928 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);929 struct ieee80211_conf *conf = &hw->conf;930 struct ieee80211_channel *channel = ch_switch->chandef.chan;931 struct iwl_ht_config *ht_conf = &priv->current_ht_config;932 /*933 * MULTI-FIXME934 * When we add support for multiple interfaces, we need to935 * revisit this. The channel switch command in the device936 * only affects the BSS context, but what does that really937 * mean? And what if we get a CSA on the second interface?938 * This needs a lot of work.939 */940 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];941 u16 ch;942 943 IWL_DEBUG_MAC80211(priv, "enter\n");944 945 mutex_lock(&priv->mutex);946 947 if (iwl_is_rfkill(priv))948 goto out;949 950 if (test_bit(STATUS_EXIT_PENDING, &priv->status) ||951 test_bit(STATUS_SCANNING, &priv->status) ||952 test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))953 goto out;954 955 if (!iwl_is_associated_ctx(ctx))956 goto out;957 958 if (!priv->lib->set_channel_switch)959 goto out;960 961 ch = channel->hw_value;962 if (le16_to_cpu(ctx->active.channel) == ch)963 goto out;964 965 priv->current_ht_config.smps = conf->smps_mode;966 967 /* Configure HT40 channels */968 switch (cfg80211_get_chandef_type(&ch_switch->chandef)) {969 case NL80211_CHAN_NO_HT:970 case NL80211_CHAN_HT20:971 ctx->ht.is_40mhz = false;972 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE;973 break;974 case NL80211_CHAN_HT40MINUS:975 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_BELOW;976 ctx->ht.is_40mhz = true;977 break;978 case NL80211_CHAN_HT40PLUS:979 ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;980 ctx->ht.is_40mhz = true;981 break;982 }983 984 if ((le16_to_cpu(ctx->staging.channel) != ch))985 ctx->staging.flags = 0;986 987 iwl_set_rxon_channel(priv, channel, ctx);988 iwl_set_rxon_ht(priv, ht_conf);989 iwl_set_flags_for_band(priv, ctx, channel->band, ctx->vif);990 991 /*992 * at this point, staging_rxon has the993 * configuration for channel switch994 */995 set_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);996 priv->switch_channel = cpu_to_le16(ch);997 if (priv->lib->set_channel_switch(priv, ch_switch)) {998 clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status);999 priv->switch_channel = 0;1000 ieee80211_chswitch_done(ctx->vif, false, 0);1001 }1002 1003out:1004 mutex_unlock(&priv->mutex);1005 IWL_DEBUG_MAC80211(priv, "leave\n");1006}1007 1008void iwl_chswitch_done(struct iwl_priv *priv, bool is_success)1009{1010 /*1011 * MULTI-FIXME1012 * See iwlagn_mac_channel_switch.1013 */1014 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];1015 1016 if (test_bit(STATUS_EXIT_PENDING, &priv->status))1017 return;1018 1019 if (!test_and_clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))1020 return;1021 1022 if (ctx->vif)1023 ieee80211_chswitch_done(ctx->vif, is_success, 0);1024}1025 1026static void iwlagn_configure_filter(struct ieee80211_hw *hw,1027 unsigned int changed_flags,1028 unsigned int *total_flags,1029 u64 multicast)1030{1031 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);1032 __le32 filter_or = 0, filter_nand = 0;1033 struct iwl_rxon_context *ctx;1034 1035#define CHK(test, flag) do { \1036 if (*total_flags & (test)) \1037 filter_or |= (flag); \1038 else \1039 filter_nand |= (flag); \1040 } while (0)1041 1042 IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n",1043 changed_flags, *total_flags);1044 1045 CHK(FIF_OTHER_BSS, RXON_FILTER_PROMISC_MSK);1046 /* Setting _just_ RXON_FILTER_CTL2HOST_MSK causes FH errors */1047 CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_PROMISC_MSK);1048 CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK);1049 1050#undef CHK1051 1052 mutex_lock(&priv->mutex);1053 1054 for_each_context(priv, ctx) {1055 ctx->staging.filter_flags &= ~filter_nand;1056 ctx->staging.filter_flags |= filter_or;1057 1058 /*1059 * Not committing directly because hardware can perform a scan,1060 * but we'll eventually commit the filter flags change anyway.1061 */1062 }1063 1064 mutex_unlock(&priv->mutex);1065 1066 /*1067 * Receiving all multicast frames is always enabled by the1068 * default flags setup in iwl_connection_init_rx_config()1069 * since we currently do not support programming multicast1070 * filters into the device.1071 */1072 *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI |1073 FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL;1074}1075 1076static void iwlagn_mac_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif,1077 u32 queues, bool drop)1078{1079 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);1080 u32 scd_queues;1081 1082 mutex_lock(&priv->mutex);1083 IWL_DEBUG_MAC80211(priv, "enter\n");1084 1085 if (test_bit(STATUS_EXIT_PENDING, &priv->status)) {1086 IWL_DEBUG_TX(priv, "Aborting flush due to device shutdown\n");1087 goto done;1088 }1089 if (iwl_is_rfkill(priv)) {1090 IWL_DEBUG_TX(priv, "Aborting flush due to RF Kill\n");1091 goto done;1092 }1093 1094 scd_queues = BIT(priv->trans->trans_cfg->base_params->num_of_queues) - 1;1095 scd_queues &= ~(BIT(IWL_IPAN_CMD_QUEUE_NUM) |1096 BIT(IWL_DEFAULT_CMD_QUEUE_NUM));1097 1098 if (drop) {1099 IWL_DEBUG_TX_QUEUES(priv, "Flushing SCD queues: 0x%x\n",1100 scd_queues);1101 if (iwlagn_txfifo_flush(priv, scd_queues)) {1102 IWL_ERR(priv, "flush request fail\n");1103 goto done;1104 }1105 }1106 1107 IWL_DEBUG_TX_QUEUES(priv, "wait transmit/flush all frames\n");1108 iwl_trans_wait_tx_queues_empty(priv->trans, scd_queues);1109done:1110 mutex_unlock(&priv->mutex);1111 IWL_DEBUG_MAC80211(priv, "leave\n");1112}1113 1114static void iwlagn_mac_event_callback(struct ieee80211_hw *hw,1115 struct ieee80211_vif *vif,1116 const struct ieee80211_event *event)1117{1118 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);1119 1120 if (event->type != RSSI_EVENT)1121 return;1122 1123 IWL_DEBUG_MAC80211(priv, "enter\n");1124 1125 if (priv->lib->bt_params &&1126 priv->lib->bt_params->advanced_bt_coexist) {1127 if (event->u.rssi.data == RSSI_EVENT_LOW)1128 priv->bt_enable_pspoll = true;1129 else if (event->u.rssi.data == RSSI_EVENT_HIGH)1130 priv->bt_enable_pspoll = false;1131 1132 queue_work(priv->workqueue, &priv->bt_runtime_config);1133 } else {1134 IWL_DEBUG_MAC80211(priv, "Advanced BT coex disabled,"1135 "ignoring RSSI callback\n");1136 }1137 1138 IWL_DEBUG_MAC80211(priv, "leave\n");1139}1140 1141static int iwlagn_mac_set_tim(struct ieee80211_hw *hw,1142 struct ieee80211_sta *sta, bool set)1143{1144 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);1145 1146 queue_work(priv->workqueue, &priv->beacon_update);1147 1148 return 0;1149}1150 1151static int iwlagn_mac_conf_tx(struct ieee80211_hw *hw,1152 struct ieee80211_vif *vif,1153 unsigned int link_id, u16 queue,1154 const struct ieee80211_tx_queue_params *params)1155{1156 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);1157 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;1158 struct iwl_rxon_context *ctx = vif_priv->ctx;1159 int q;1160 1161 if (WARN_ON(!ctx))1162 return -EINVAL;1163 1164 IWL_DEBUG_MAC80211(priv, "enter\n");1165 1166 if (!iwl_is_ready_rf(priv)) {1167 IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n");1168 return -EIO;1169 }1170 1171 if (queue >= AC_NUM) {1172 IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue);1173 return 0;1174 }1175 1176 q = AC_NUM - 1 - queue;1177 1178 mutex_lock(&priv->mutex);1179 1180 ctx->qos_data.def_qos_parm.ac[q].cw_min =1181 cpu_to_le16(params->cw_min);1182 ctx->qos_data.def_qos_parm.ac[q].cw_max =1183 cpu_to_le16(params->cw_max);1184 ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;1185 ctx->qos_data.def_qos_parm.ac[q].edca_txop =1186 cpu_to_le16((params->txop * 32));1187 1188 ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0;1189 1190 mutex_unlock(&priv->mutex);1191 1192 IWL_DEBUG_MAC80211(priv, "leave\n");1193 return 0;1194}1195 1196static int iwlagn_mac_tx_last_beacon(struct ieee80211_hw *hw)1197{1198 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);1199 1200 return priv->ibss_manager == IWL_IBSS_MANAGER;1201}1202 1203static int iwl_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx)1204{1205 iwl_connection_init_rx_config(priv, ctx);1206 1207 iwlagn_set_rxon_chain(priv, ctx);1208 1209 return iwlagn_commit_rxon(priv, ctx);1210}1211 1212static int iwl_setup_interface(struct iwl_priv *priv,1213 struct iwl_rxon_context *ctx)1214{1215 struct ieee80211_vif *vif = ctx->vif;1216 int err, ac;1217 1218 lockdep_assert_held(&priv->mutex);1219 1220 /*1221 * This variable will be correct only when there's just1222 * a single context, but all code using it is for hardware1223 * that supports only one context.1224 */1225 priv->iw_mode = vif->type;1226 1227 ctx->is_active = true;1228 1229 err = iwl_set_mode(priv, ctx);1230 if (err) {1231 if (!ctx->always_active)1232 ctx->is_active = false;1233 return err;1234 }1235 1236 if (priv->lib->bt_params && priv->lib->bt_params->advanced_bt_coexist &&1237 vif->type == NL80211_IFTYPE_ADHOC) {1238 /*1239 * pretend to have high BT traffic as long as we1240 * are operating in IBSS mode, as this will cause1241 * the rate scaling etc. to behave as intended.1242 */1243 priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH;1244 }1245 1246 /* set up queue mappings */1247 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)1248 vif->hw_queue[ac] = ctx->ac_to_queue[ac];1249 1250 if (vif->type == NL80211_IFTYPE_AP)1251 vif->cab_queue = ctx->mcast_queue;1252 else1253 vif->cab_queue = IEEE80211_INVAL_HW_QUEUE;1254 1255 return 0;1256}1257 1258static int iwlagn_mac_add_interface(struct ieee80211_hw *hw,1259 struct ieee80211_vif *vif)1260{1261 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);1262 struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;1263 struct iwl_rxon_context *tmp, *ctx = NULL;1264 int err;1265 enum nl80211_iftype viftype = ieee80211_vif_type_p2p(vif);1266 bool reset = false;1267 1268 IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n",1269 viftype, vif->addr);1270 1271 mutex_lock(&priv->mutex);1272 1273 if (!iwl_is_ready_rf(priv)) {1274 IWL_WARN(priv, "Try to add interface when device not ready\n");1275 err = -EINVAL;1276 goto out;1277 }1278 1279 for_each_context(priv, tmp) {1280 u32 possible_modes =1281 tmp->interface_modes | tmp->exclusive_interface_modes;1282 1283 if (tmp->vif) {1284 /* On reset we need to add the same interface again */1285 if (tmp->vif == vif) {1286 reset = true;1287 ctx = tmp;1288 break;1289 }1290 1291 /* check if this busy context is exclusive */1292 if (tmp->exclusive_interface_modes &1293 BIT(tmp->vif->type)) {1294 err = -EINVAL;1295 goto out;1296 }1297 continue;1298 }1299 1300 if (!(possible_modes & BIT(viftype)))1301 continue;1302 1303 /* have maybe usable context w/o interface */1304 ctx = tmp;1305 break;1306 }1307 1308 if (!ctx) {1309 err = -EOPNOTSUPP;1310 goto out;1311 }1312 1313 vif_priv->ctx = ctx;1314 ctx->vif = vif;1315 1316 /*1317 * In SNIFFER device type, the firmware reports the FCS to1318 * the host, rather than snipping it off. Unfortunately,1319 * mac80211 doesn't (yet) provide a per-packet flag for1320 * this, so that we have to set the hardware flag based1321 * on the interfaces added. As the monitor interface can1322 * only be present by itself, and will be removed before1323 * other interfaces are added, this is safe.1324 */1325 if (vif->type == NL80211_IFTYPE_MONITOR)1326 ieee80211_hw_set(priv->hw, RX_INCLUDES_FCS);1327 else1328 __clear_bit(IEEE80211_HW_RX_INCLUDES_FCS, priv->hw->flags);1329 1330 err = iwl_setup_interface(priv, ctx);1331 if (!err || reset)1332 goto out;1333 1334 ctx->vif = NULL;1335 priv->iw_mode = NL80211_IFTYPE_STATION;1336 out:1337 mutex_unlock(&priv->mutex);1338 1339 IWL_DEBUG_MAC80211(priv, "leave\n");1340 return err;1341}1342 1343static void iwl_teardown_interface(struct iwl_priv *priv,1344 struct ieee80211_vif *vif,1345 bool mode_change)1346{1347 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);1348 1349 lockdep_assert_held(&priv->mutex);1350 1351 if (priv->scan_vif == vif) {1352 iwl_scan_cancel_timeout(priv, 200);1353 iwl_force_scan_end(priv);1354 }1355 1356 if (!mode_change) {1357 iwl_set_mode(priv, ctx);1358 if (!ctx->always_active)1359 ctx->is_active = false;1360 }1361 1362 /*1363 * When removing the IBSS interface, overwrite the1364 * BT traffic load with the stored one from the last1365 * notification, if any. If this is a device that1366 * doesn't implement this, this has no effect since1367 * both values are the same and zero.1368 */1369 if (vif->type == NL80211_IFTYPE_ADHOC)1370 priv->bt_traffic_load = priv->last_bt_traffic_load;1371}1372 1373static void iwlagn_mac_remove_interface(struct ieee80211_hw *hw,1374 struct ieee80211_vif *vif)1375{1376 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);1377 struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif);1378 1379 IWL_DEBUG_MAC80211(priv, "enter\n");1380 1381 mutex_lock(&priv->mutex);1382 1383 WARN_ON(ctx->vif != vif);1384 ctx->vif = NULL;1385 1386 iwl_teardown_interface(priv, vif, false);1387 1388 mutex_unlock(&priv->mutex);1389 1390 IWL_DEBUG_MAC80211(priv, "leave\n");1391 1392}1393 1394static int iwlagn_mac_change_interface(struct ieee80211_hw *hw,1395 struct ieee80211_vif *vif,1396 enum nl80211_iftype newtype, bool newp2p)1397{1398 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);1399 struct iwl_rxon_context *ctx, *tmp;1400 enum nl80211_iftype newviftype = newtype;1401 u32 interface_modes;1402 int err;1403 1404 IWL_DEBUG_MAC80211(priv, "enter\n");1405 1406 newtype = ieee80211_iftype_p2p(newtype, newp2p);1407 1408 mutex_lock(&priv->mutex);1409 1410 ctx = iwl_rxon_ctx_from_vif(vif);1411 1412 /*1413 * To simplify this code, only support changes on the1414 * BSS context. The PAN context is usually reassigned1415 * by creating/removing P2P interfaces anyway.1416 */1417 if (ctx->ctxid != IWL_RXON_CTX_BSS) {1418 err = -EBUSY;1419 goto out;1420 }1421 1422 if (!ctx->vif || !iwl_is_ready_rf(priv)) {1423 /*1424 * Huh? But wait ... this can maybe happen when1425 * we're in the middle of a firmware restart!1426 */1427 err = -EBUSY;1428 goto out;1429 }1430 1431 /* Check if the switch is supported in the same context */1432 interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes;1433 if (!(interface_modes & BIT(newtype))) {1434 err = -EBUSY;1435 goto out;1436 }1437 1438 if (ctx->exclusive_interface_modes & BIT(newtype)) {1439 for_each_context(priv, tmp) {1440 if (ctx == tmp)1441 continue;1442 1443 if (!tmp->is_active)1444 continue;1445 1446 /*1447 * The current mode switch would be exclusive, but1448 * another context is active ... refuse the switch.1449 */1450 err = -EBUSY;1451 goto out;1452 }1453 }1454 1455 /* success */1456 iwl_teardown_interface(priv, vif, true);1457 vif->type = newviftype;1458 vif->p2p = newp2p;1459 err = iwl_setup_interface(priv, ctx);1460 WARN_ON(err);1461 /*1462 * We've switched internally, but submitting to the1463 * device may have failed for some reason. Mask this1464 * error, because otherwise mac80211 will not switch1465 * (and set the interface type back) and we'll be1466 * out of sync with it.1467 */1468 err = 0;1469 1470 out:1471 mutex_unlock(&priv->mutex);1472 IWL_DEBUG_MAC80211(priv, "leave\n");1473 1474 return err;1475}1476 1477static int iwlagn_mac_hw_scan(struct ieee80211_hw *hw,1478 struct ieee80211_vif *vif,1479 struct ieee80211_scan_request *hw_req)1480{1481 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);1482 struct cfg80211_scan_request *req = &hw_req->req;1483 int ret;1484 1485 IWL_DEBUG_MAC80211(priv, "enter\n");1486 1487 if (req->n_channels == 0)1488 return -EINVAL;1489 1490 mutex_lock(&priv->mutex);1491 1492 /*1493 * If an internal scan is in progress, just set1494 * up the scan_request as per above.1495 */1496 if (priv->scan_type != IWL_SCAN_NORMAL) {1497 IWL_DEBUG_SCAN(priv,1498 "SCAN request during internal scan - defer\n");1499 priv->scan_request = req;1500 priv->scan_vif = vif;1501 ret = 0;1502 } else {1503 priv->scan_request = req;1504 priv->scan_vif = vif;1505 /*1506 * mac80211 will only ask for one band at a time1507 * so using channels[0] here is ok1508 */1509 ret = iwl_scan_initiate(priv, vif, IWL_SCAN_NORMAL,1510 req->channels[0]->band);1511 if (ret) {1512 priv->scan_request = NULL;1513 priv->scan_vif = NULL;1514 }1515 }1516 1517 IWL_DEBUG_MAC80211(priv, "leave\n");1518 1519 mutex_unlock(&priv->mutex);1520 1521 return ret;1522}1523 1524static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)1525{1526 struct iwl_addsta_cmd cmd = {1527 .mode = STA_CONTROL_MODIFY_MSK,1528 .station_flags_msk = STA_FLG_PWR_SAVE_MSK,1529 .sta.sta_id = sta_id,1530 };1531 1532 iwl_send_add_sta(priv, &cmd, CMD_ASYNC);1533}1534 1535static void iwlagn_mac_sta_notify(struct ieee80211_hw *hw,1536 struct ieee80211_vif *vif,1537 enum sta_notify_cmd cmd,1538 struct ieee80211_sta *sta)1539{1540 struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw);1541 struct iwl_station_priv *sta_priv = (void *)sta->drv_priv;1542 int sta_id;1543 1544 IWL_DEBUG_MAC80211(priv, "enter\n");1545 1546 switch (cmd) {1547 case STA_NOTIFY_SLEEP:1548 WARN_ON(!sta_priv->client);1549 sta_priv->asleep = true;1550 if (atomic_read(&sta_priv->pending_frames) > 0)1551 ieee80211_sta_block_awake(hw, sta, true);1552 break;1553 case STA_NOTIFY_AWAKE:1554 WARN_ON(!sta_priv->client);1555 if (!sta_priv->asleep)1556 break;1557 sta_priv->asleep = false;1558 sta_id = iwl_sta_id(sta);1559 if (sta_id != IWL_INVALID_STATION)1560 iwl_sta_modify_ps_wake(priv, sta_id);1561 break;1562 default:1563 break;1564 }1565 IWL_DEBUG_MAC80211(priv, "leave\n");1566}1567 1568const struct ieee80211_ops iwlagn_hw_ops = {1569 .add_chanctx = ieee80211_emulate_add_chanctx,1570 .remove_chanctx = ieee80211_emulate_remove_chanctx,1571 .change_chanctx = ieee80211_emulate_change_chanctx,1572 .switch_vif_chanctx = ieee80211_emulate_switch_vif_chanctx,1573 .tx = iwlagn_mac_tx,1574 .wake_tx_queue = ieee80211_handle_wake_tx_queue,1575 .start = iwlagn_mac_start,1576 .stop = iwlagn_mac_stop,1577#ifdef CONFIG_PM_SLEEP1578 .suspend = iwlagn_mac_suspend,1579 .resume = iwlagn_mac_resume,1580 .set_wakeup = iwlagn_mac_set_wakeup,1581#endif1582 .add_interface = iwlagn_mac_add_interface,1583 .remove_interface = iwlagn_mac_remove_interface,1584 .change_interface = iwlagn_mac_change_interface,1585 .config = iwlagn_mac_config,1586 .configure_filter = iwlagn_configure_filter,1587 .set_key = iwlagn_mac_set_key,1588 .update_tkip_key = iwlagn_mac_update_tkip_key,1589 .set_rekey_data = iwlagn_mac_set_rekey_data,1590 .conf_tx = iwlagn_mac_conf_tx,1591 .bss_info_changed = iwlagn_bss_info_changed,1592 .ampdu_action = iwlagn_mac_ampdu_action,1593 .hw_scan = iwlagn_mac_hw_scan,1594 .sta_notify = iwlagn_mac_sta_notify,1595 .sta_state = iwlagn_mac_sta_state,1596 .channel_switch = iwlagn_mac_channel_switch,1597 .flush = iwlagn_mac_flush,1598 .tx_last_beacon = iwlagn_mac_tx_last_beacon,1599 .event_callback = iwlagn_mac_event_callback,1600 .set_tim = iwlagn_mac_set_tim,1601};1602 1603/* This function both allocates and initializes hw and priv. */1604struct ieee80211_hw *iwl_alloc_all(void)1605{1606 struct iwl_priv *priv;1607 struct iwl_op_mode *op_mode;1608 /* mac80211 allocates memory for this device instance, including1609 * space for this driver's private structure */1610 struct ieee80211_hw *hw;1611 1612 hw = ieee80211_alloc_hw(sizeof(struct iwl_priv) +1613 sizeof(struct iwl_op_mode), &iwlagn_hw_ops);1614 if (!hw)1615 goto out;1616 1617 op_mode = hw->priv;1618 priv = IWL_OP_MODE_GET_DVM(op_mode);1619 priv->hw = hw;1620 1621out:1622 return hw;1623}1624