| /****************************************************************************** |
| * |
| * Copyright(c) 2003 - 2014 Intel Corporation. All rights reserved. |
| * |
| * Portions of this file are derived from the ipw3945 project, as well |
| * as portions of the ieee80211 subsystem header files. |
| * |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms of version 2 of the GNU General Public License as |
| * published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| * more details. |
| * |
| * You should have received a copy of the GNU General Public License along with |
| * this program; if not, write to the Free Software Foundation, Inc., |
| * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA |
| * |
| * The full GNU General Public License is included in this distribution in the |
| * file called LICENSE. |
| * |
| * Contact Information: |
| * Intel Linux Wireless <ilw@linux.intel.com> |
| * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 |
| * |
| *****************************************************************************/ |
| #include <linux/kernel.h> |
| #include <linux/module.h> |
| #include <linux/slab.h> |
| #include <linux/dma-mapping.h> |
| #include <linux/delay.h> |
| #include <linux/sched.h> |
| #include <linux/skbuff.h> |
| #include <linux/netdevice.h> |
| #include <linux/etherdevice.h> |
| #include <linux/if_arp.h> |
| |
| #include <net/ieee80211_radiotap.h> |
| #include <net/mac80211.h> |
| |
| #include <asm/div64.h> |
| |
| #include "iwl-io.h" |
| #include "iwl-trans.h" |
| #include "iwl-op-mode.h" |
| #include "iwl-modparams.h" |
| |
| #include "dev.h" |
| #include "calib.h" |
| #include "agn.h" |
| |
| /***************************************************************************** |
| * |
| * mac80211 entry point functions |
| * |
| *****************************************************************************/ |
| |
| static const struct ieee80211_iface_limit iwlagn_sta_ap_limits[] = { |
| { |
| .max = 1, |
| .types = BIT(NL80211_IFTYPE_STATION), |
| }, |
| { |
| .max = 1, |
| .types = BIT(NL80211_IFTYPE_AP), |
| }, |
| }; |
| |
| static const struct ieee80211_iface_limit iwlagn_2sta_limits[] = { |
| { |
| .max = 2, |
| .types = BIT(NL80211_IFTYPE_STATION), |
| }, |
| }; |
| |
| static const struct ieee80211_iface_combination |
| iwlagn_iface_combinations_dualmode[] = { |
| { .num_different_channels = 1, |
| .max_interfaces = 2, |
| .beacon_int_infra_match = true, |
| .limits = iwlagn_sta_ap_limits, |
| .n_limits = ARRAY_SIZE(iwlagn_sta_ap_limits), |
| }, |
| { .num_different_channels = 1, |
| .max_interfaces = 2, |
| .limits = iwlagn_2sta_limits, |
| .n_limits = ARRAY_SIZE(iwlagn_2sta_limits), |
| }, |
| }; |
| |
| /* |
| * Not a mac80211 entry point function, but it fits in with all the |
| * other mac80211 functions grouped here. |
| */ |
| int iwlagn_mac_setup_register(struct iwl_priv *priv, |
| const struct iwl_ucode_capabilities *capa) |
| { |
| int ret; |
| struct ieee80211_hw *hw = priv->hw; |
| struct iwl_rxon_context *ctx; |
| |
| hw->rate_control_algorithm = "iwl-agn-rs"; |
| |
| /* Tell mac80211 our characteristics */ |
| hw->flags = IEEE80211_HW_SIGNAL_DBM | |
| IEEE80211_HW_AMPDU_AGGREGATION | |
| IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC | |
| IEEE80211_HW_SPECTRUM_MGMT | |
| IEEE80211_HW_REPORTS_TX_ACK_STATUS | |
| IEEE80211_HW_QUEUE_CONTROL | |
| IEEE80211_HW_SUPPORTS_PS | |
| IEEE80211_HW_SUPPORTS_DYNAMIC_PS | |
| IEEE80211_HW_WANT_MONITOR_VIF; |
| |
| hw->offchannel_tx_hw_queue = IWL_AUX_QUEUE; |
| hw->radiotap_mcs_details |= IEEE80211_RADIOTAP_MCS_HAVE_FMT; |
| |
| /* |
| * Including the following line will crash some AP's. This |
| * workaround removes the stimulus which causes the crash until |
| * the AP software can be fixed. |
| hw->max_tx_aggregation_subframes = LINK_QUAL_AGG_FRAME_LIMIT_DEF; |
| */ |
| |
| if (priv->nvm_data->sku_cap_11n_enable) |
| hw->wiphy->features |= NL80211_FEATURE_DYNAMIC_SMPS | |
| NL80211_FEATURE_STATIC_SMPS; |
| |
| /* |
| * Enable 11w if advertised by firmware and software crypto |
| * is not enabled (as the firmware will interpret some mgmt |
| * packets, so enabling it with software crypto isn't safe) |
| */ |
| if (priv->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_MFP && |
| !iwlwifi_mod_params.sw_crypto) |
| hw->flags |= IEEE80211_HW_MFP_CAPABLE; |
| |
| hw->sta_data_size = sizeof(struct iwl_station_priv); |
| hw->vif_data_size = sizeof(struct iwl_vif_priv); |
| |
| for_each_context(priv, ctx) { |
| hw->wiphy->interface_modes |= ctx->interface_modes; |
| hw->wiphy->interface_modes |= ctx->exclusive_interface_modes; |
| } |
| |
| BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2); |
| |
| if (hw->wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) { |
| hw->wiphy->iface_combinations = |
| iwlagn_iface_combinations_dualmode; |
| hw->wiphy->n_iface_combinations = |
| ARRAY_SIZE(iwlagn_iface_combinations_dualmode); |
| } |
| |
| hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN; |
| hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG | |
| REGULATORY_DISABLE_BEACON_HINTS; |
| |
| #ifdef CONFIG_PM_SLEEP |
| if (priv->fw->img[IWL_UCODE_WOWLAN].sec[0].len && |
| priv->trans->ops->d3_suspend && |
| priv->trans->ops->d3_resume && |
| device_can_wakeup(priv->trans->dev)) { |
| priv->wowlan_support.flags = WIPHY_WOWLAN_MAGIC_PKT | |
| WIPHY_WOWLAN_DISCONNECT | |
| WIPHY_WOWLAN_EAP_IDENTITY_REQ | |
| WIPHY_WOWLAN_RFKILL_RELEASE; |
| if (!iwlwifi_mod_params.sw_crypto) |
| priv->wowlan_support.flags |= |
| WIPHY_WOWLAN_SUPPORTS_GTK_REKEY | |
| WIPHY_WOWLAN_GTK_REKEY_FAILURE; |
| |
| priv->wowlan_support.n_patterns = IWLAGN_WOWLAN_MAX_PATTERNS; |
| priv->wowlan_support.pattern_min_len = |
| IWLAGN_WOWLAN_MIN_PATTERN_LEN; |
| priv->wowlan_support.pattern_max_len = |
| IWLAGN_WOWLAN_MAX_PATTERN_LEN; |
| hw->wiphy->wowlan = &priv->wowlan_support; |
| } |
| #endif |
| |
| if (iwlwifi_mod_params.power_save) |
| hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT; |
| else |
| hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT; |
| |
| hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX; |
| /* we create the 802.11 header and a max-length SSID element */ |
| hw->wiphy->max_scan_ie_len = capa->max_probe_length - 24 - 34; |
| |
| /* |
| * We don't use all queues: 4 and 9 are unused and any |
| * aggregation queue gets mapped down to the AC queue. |
| */ |
| hw->queues = IWLAGN_FIRST_AMPDU_QUEUE; |
| |
| hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL; |
| |
| if (priv->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels) |
| priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = |
| &priv->nvm_data->bands[IEEE80211_BAND_2GHZ]; |
| if (priv->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels) |
| priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] = |
| &priv->nvm_data->bands[IEEE80211_BAND_5GHZ]; |
| |
| hw->wiphy->hw_version = priv->trans->hw_id; |
| |
| iwl_leds_init(priv); |
| |
| ret = ieee80211_register_hw(priv->hw); |
| if (ret) { |
| IWL_ERR(priv, "Failed to register hw (error %d)\n", ret); |
| iwl_leds_exit(priv); |
| return ret; |
| } |
| priv->mac80211_registered = 1; |
| |
| return 0; |
| } |
| |
| void iwlagn_mac_unregister(struct iwl_priv *priv) |
| { |
| if (!priv->mac80211_registered) |
| return; |
| iwl_leds_exit(priv); |
| ieee80211_unregister_hw(priv->hw); |
| priv->mac80211_registered = 0; |
| } |
| |
| static int __iwl_up(struct iwl_priv *priv) |
| { |
| struct iwl_rxon_context *ctx; |
| int ret; |
| |
| lockdep_assert_held(&priv->mutex); |
| |
| if (test_bit(STATUS_EXIT_PENDING, &priv->status)) { |
| IWL_WARN(priv, "Exit pending; will not bring the NIC up\n"); |
| return -EIO; |
| } |
| |
| for_each_context(priv, ctx) { |
| ret = iwlagn_alloc_bcast_station(priv, ctx); |
| if (ret) { |
| iwl_dealloc_bcast_stations(priv); |
| return ret; |
| } |
| } |
| |
| ret = iwl_run_init_ucode(priv); |
| if (ret) { |
| IWL_ERR(priv, "Failed to run INIT ucode: %d\n", ret); |
| goto error; |
| } |
| |
| ret = iwl_load_ucode_wait_alive(priv, IWL_UCODE_REGULAR); |
| if (ret) { |
| IWL_ERR(priv, "Failed to start RT ucode: %d\n", ret); |
| goto error; |
| } |
| |
| ret = iwl_alive_start(priv); |
| if (ret) |
| goto error; |
| return 0; |
| |
| error: |
| set_bit(STATUS_EXIT_PENDING, &priv->status); |
| iwl_down(priv); |
| clear_bit(STATUS_EXIT_PENDING, &priv->status); |
| |
| IWL_ERR(priv, "Unable to initialize device.\n"); |
| return ret; |
| } |
| |
| static int iwlagn_mac_start(struct ieee80211_hw *hw) |
| { |
| struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); |
| int ret; |
| |
| IWL_DEBUG_MAC80211(priv, "enter\n"); |
| |
| /* we should be verifying the device is ready to be opened */ |
| mutex_lock(&priv->mutex); |
| ret = __iwl_up(priv); |
| mutex_unlock(&priv->mutex); |
| if (ret) |
| return ret; |
| |
| IWL_DEBUG_INFO(priv, "Start UP work done.\n"); |
| |
| /* Now we should be done, and the READY bit should be set. */ |
| if (WARN_ON(!test_bit(STATUS_READY, &priv->status))) |
| ret = -EIO; |
| |
| iwlagn_led_enable(priv); |
| |
| priv->is_open = 1; |
| IWL_DEBUG_MAC80211(priv, "leave\n"); |
| return 0; |
| } |
| |
| static void iwlagn_mac_stop(struct ieee80211_hw *hw) |
| { |
| struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); |
| |
| IWL_DEBUG_MAC80211(priv, "enter\n"); |
| |
| if (!priv->is_open) |
| return; |
| |
| priv->is_open = 0; |
| |
| mutex_lock(&priv->mutex); |
| iwl_down(priv); |
| mutex_unlock(&priv->mutex); |
| |
| iwl_cancel_deferred_work(priv); |
| |
| flush_workqueue(priv->workqueue); |
| |
| IWL_DEBUG_MAC80211(priv, "leave\n"); |
| } |
| |
| static void iwlagn_mac_set_rekey_data(struct ieee80211_hw *hw, |
| struct ieee80211_vif *vif, |
| struct cfg80211_gtk_rekey_data *data) |
| { |
| struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); |
| |
| if (iwlwifi_mod_params.sw_crypto) |
| return; |
| |
| IWL_DEBUG_MAC80211(priv, "enter\n"); |
| mutex_lock(&priv->mutex); |
| |
| if (priv->contexts[IWL_RXON_CTX_BSS].vif != vif) |
| goto out; |
| |
| memcpy(priv->kek, data->kek, NL80211_KEK_LEN); |
| memcpy(priv->kck, data->kck, NL80211_KCK_LEN); |
| priv->replay_ctr = |
| cpu_to_le64(be64_to_cpup((__be64 *)&data->replay_ctr)); |
| priv->have_rekey_data = true; |
| |
| out: |
| mutex_unlock(&priv->mutex); |
| IWL_DEBUG_MAC80211(priv, "leave\n"); |
| } |
| |
| #ifdef CONFIG_PM_SLEEP |
| |
| static int iwlagn_mac_suspend(struct ieee80211_hw *hw, |
| struct cfg80211_wowlan *wowlan) |
| { |
| struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); |
| struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS]; |
| int ret; |
| |
| if (WARN_ON(!wowlan)) |
| return -EINVAL; |
| |
| IWL_DEBUG_MAC80211(priv, "enter\n"); |
| mutex_lock(&priv->mutex); |
| |
| /* Don't attempt WoWLAN when not associated, tear down instead. */ |
| if (!ctx->vif || ctx->vif->type != NL80211_IFTYPE_STATION || |
| !iwl_is_associated_ctx(ctx)) { |
| ret = 1; |
| goto out; |
| } |
| |
| ret = iwlagn_suspend(priv, wowlan); |
| if (ret) |
| goto error; |
| |
| /* let the ucode operate on its own */ |
| iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_SET, |
| CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE); |
| |
| iwl_trans_d3_suspend(priv->trans, false); |
| |
| goto out; |
| |
| error: |
| priv->wowlan = false; |
| iwlagn_prepare_restart(priv); |
| ieee80211_restart_hw(priv->hw); |
| out: |
| mutex_unlock(&priv->mutex); |
| IWL_DEBUG_MAC80211(priv, "leave\n"); |
| |
| return ret; |
| } |
| |
| struct iwl_resume_data { |
| struct iwl_priv *priv; |
| struct iwlagn_wowlan_status *cmd; |
| bool valid; |
| }; |
| |
| static bool iwl_resume_status_fn(struct iwl_notif_wait_data *notif_wait, |
| struct iwl_rx_packet *pkt, void *data) |
| { |
| struct iwl_resume_data *resume_data = data; |
| struct iwl_priv *priv = resume_data->priv; |
| |
| if (iwl_rx_packet_payload_len(pkt) != sizeof(*resume_data->cmd)) { |
| IWL_ERR(priv, "rx wrong size data\n"); |
| return true; |
| } |
| memcpy(resume_data->cmd, pkt->data, sizeof(*resume_data->cmd)); |
| resume_data->valid = true; |
| |
| return true; |
| } |
| |
| static int iwlagn_mac_resume(struct ieee80211_hw *hw) |
| { |
| struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); |
| struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS]; |
| struct ieee80211_vif *vif; |
| u32 base; |
| int ret; |
| enum iwl_d3_status d3_status; |
| struct error_table_start { |
| /* cf. struct iwl_error_event_table */ |
| u32 valid; |
| u32 error_id; |
| } err_info; |
| struct iwl_notification_wait status_wait; |
| static const u8 status_cmd[] = { |
| REPLY_WOWLAN_GET_STATUS, |
| }; |
| struct iwlagn_wowlan_status status_data = {}; |
| struct iwl_resume_data resume_data = { |
| .priv = priv, |
| .cmd = &status_data, |
| .valid = false, |
| }; |
| struct cfg80211_wowlan_wakeup wakeup = { |
| .pattern_idx = -1, |
| }; |
| #ifdef CPTCFG_IWLWIFI_DEBUGFS |
| const struct fw_img *img; |
| #endif |
| |
| IWL_DEBUG_MAC80211(priv, "enter\n"); |
| mutex_lock(&priv->mutex); |
| |
| /* we'll clear ctx->vif during iwlagn_prepare_restart() */ |
| vif = ctx->vif; |
| |
| ret = iwl_trans_d3_resume(priv->trans, &d3_status, false); |
| if (ret) |
| goto out_unlock; |
| |
| if (d3_status != IWL_D3_STATUS_ALIVE) { |
| IWL_INFO(priv, "Device was reset during suspend\n"); |
| goto out_unlock; |
| } |
| |
| /* uCode is no longer operating by itself */ |
| iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_CLR, |
| CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE); |
| |
| base = priv->device_pointers.error_event_table; |
| if (!iwlagn_hw_valid_rtc_data_addr(base)) { |
| IWL_WARN(priv, "Invalid error table during resume!\n"); |
| goto out_unlock; |
| } |
| |
| iwl_trans_read_mem_bytes(priv->trans, base, |
| &err_info, sizeof(err_info)); |
| |
| if (err_info.valid) { |
| IWL_INFO(priv, "error table is valid (%d, 0x%x)\n", |
| err_info.valid, err_info.error_id); |
| if (err_info.error_id == RF_KILL_INDICATOR_FOR_WOWLAN) { |
| wakeup.rfkill_release = true; |
| ieee80211_report_wowlan_wakeup(vif, &wakeup, |
| GFP_KERNEL); |
| } |
| goto out_unlock; |
| } |
| |
| #ifdef CPTCFG_IWLWIFI_DEBUGFS |
| img = &priv->fw->img[IWL_UCODE_WOWLAN]; |
| if (!priv->wowlan_sram) |
| priv->wowlan_sram = |
| kzalloc(img->sec[IWL_UCODE_SECTION_DATA].len, |
| GFP_KERNEL); |
| |
| if (priv->wowlan_sram) |
| iwl_trans_read_mem(priv->trans, 0x800000, |
| priv->wowlan_sram, |
| img->sec[IWL_UCODE_SECTION_DATA].len / 4); |
| #endif |
| |
| /* |
| * This is very strange. The GET_STATUS command is sent but the device |
| * doesn't reply properly, it seems it doesn't close the RBD so one is |
| * always left open ... As a result, we need to send another command |
| * and have to reset the driver afterwards. As we need to switch to |
| * runtime firmware again that'll happen. |
| */ |
| |
| iwl_init_notification_wait(&priv->notif_wait, &status_wait, status_cmd, |
| ARRAY_SIZE(status_cmd), iwl_resume_status_fn, |
| &resume_data); |
| |
| iwl_dvm_send_cmd_pdu(priv, REPLY_WOWLAN_GET_STATUS, CMD_ASYNC, 0, NULL); |
| iwl_dvm_send_cmd_pdu(priv, REPLY_ECHO, CMD_ASYNC, 0, NULL); |
| /* an RBD is left open in the firmware now! */ |
| |
| ret = iwl_wait_notification(&priv->notif_wait, &status_wait, HZ/5); |
| if (ret) |
| goto out_unlock; |
| |
| if (resume_data.valid && priv->contexts[IWL_RXON_CTX_BSS].vif) { |
| u32 reasons = le32_to_cpu(status_data.wakeup_reason); |
| struct cfg80211_wowlan_wakeup *wakeup_report; |
| |
| IWL_INFO(priv, "WoWLAN wakeup reason(s): 0x%.8x\n", reasons); |
| |
| if (reasons) { |
| if (reasons & IWLAGN_WOWLAN_WAKEUP_MAGIC_PACKET) |
| wakeup.magic_pkt = true; |
| if (reasons & IWLAGN_WOWLAN_WAKEUP_PATTERN_MATCH) |
| wakeup.pattern_idx = status_data.pattern_number; |
| if (reasons & (IWLAGN_WOWLAN_WAKEUP_BEACON_MISS | |
| IWLAGN_WOWLAN_WAKEUP_LINK_CHANGE)) |
| wakeup.disconnect = true; |
| if (reasons & IWLAGN_WOWLAN_WAKEUP_GTK_REKEY_FAIL) |
| wakeup.gtk_rekey_failure = true; |
| if (reasons & IWLAGN_WOWLAN_WAKEUP_EAP_IDENT_REQ) |
| wakeup.eap_identity_req = true; |
| if (reasons & IWLAGN_WOWLAN_WAKEUP_4WAY_HANDSHAKE) |
| wakeup.four_way_handshake = true; |
| wakeup_report = &wakeup; |
| } else { |
| wakeup_report = NULL; |
| } |
| |
| ieee80211_report_wowlan_wakeup(vif, wakeup_report, GFP_KERNEL); |
| } |
| |
| priv->wowlan = false; |
| |
| iwlagn_prepare_restart(priv); |
| |
| memset((void *)&ctx->active, 0, sizeof(ctx->active)); |
| iwl_connection_init_rx_config(priv, ctx); |
| iwlagn_set_rxon_chain(priv, ctx); |
| |
| out_unlock: |
| mutex_unlock(&priv->mutex); |
| IWL_DEBUG_MAC80211(priv, "leave\n"); |
| |
| ieee80211_resume_disconnect(vif); |
| |
| return 1; |
| } |
| |
| static void iwlagn_mac_set_wakeup(struct ieee80211_hw *hw, bool enabled) |
| { |
| struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); |
| |
| device_set_wakeup_enable(priv->trans->dev, enabled); |
| } |
| #endif |
| |
| static void iwlagn_mac_tx(struct ieee80211_hw *hw, |
| struct ieee80211_tx_control *control, |
| struct sk_buff *skb) |
| { |
| struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); |
| |
| if (iwlagn_tx_skb(priv, control->sta, skb)) |
| ieee80211_free_txskb(hw, skb); |
| } |
| |
| static void iwlagn_mac_update_tkip_key(struct ieee80211_hw *hw, |
| struct ieee80211_vif *vif, |
| struct ieee80211_key_conf *keyconf, |
| struct ieee80211_sta *sta, |
| u32 iv32, u16 *phase1key) |
| { |
| struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); |
| |
| iwl_update_tkip_key(priv, vif, keyconf, sta, iv32, phase1key); |
| } |
| |
| static int iwlagn_mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd, |
| struct ieee80211_vif *vif, |
| struct ieee80211_sta *sta, |
| struct ieee80211_key_conf *key) |
| { |
| struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); |
| struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv; |
| struct iwl_rxon_context *ctx = vif_priv->ctx; |
| int ret; |
| bool is_default_wep_key = false; |
| |
| IWL_DEBUG_MAC80211(priv, "enter\n"); |
| |
| if (iwlwifi_mod_params.sw_crypto) { |
| IWL_DEBUG_MAC80211(priv, "leave - hwcrypto disabled\n"); |
| return -EOPNOTSUPP; |
| } |
| |
| switch (key->cipher) { |
| case WLAN_CIPHER_SUITE_TKIP: |
| key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC; |
| /* fall through */ |
| case WLAN_CIPHER_SUITE_CCMP: |
| key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV; |
| break; |
| default: |
| break; |
| } |
| |
| /* |
| * We could program these keys into the hardware as well, but we |
| * don't expect much multicast traffic in IBSS and having keys |
| * for more stations is probably more useful. |
| * |
| * Mark key TX-only and return 0. |
| */ |
| if (vif->type == NL80211_IFTYPE_ADHOC && |
| !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) { |
| key->hw_key_idx = WEP_INVALID_OFFSET; |
| return 0; |
| } |
| |
| /* If they key was TX-only, accept deletion */ |
| if (cmd == DISABLE_KEY && key->hw_key_idx == WEP_INVALID_OFFSET) |
| return 0; |
| |
| mutex_lock(&priv->mutex); |
| iwl_scan_cancel_timeout(priv, 100); |
| |
| BUILD_BUG_ON(WEP_INVALID_OFFSET == IWLAGN_HW_KEY_DEFAULT); |
| |
| /* |
| * If we are getting WEP group key and we didn't receive any key mapping |
| * so far, we are in legacy wep mode (group key only), otherwise we are |
| * in 1X mode. |
| * In legacy wep mode, we use another host command to the uCode. |
| */ |
| if ((key->cipher == WLAN_CIPHER_SUITE_WEP40 || |
| key->cipher == WLAN_CIPHER_SUITE_WEP104) && !sta) { |
| if (cmd == SET_KEY) |
| is_default_wep_key = !ctx->key_mapping_keys; |
| else |
| is_default_wep_key = |
| key->hw_key_idx == IWLAGN_HW_KEY_DEFAULT; |
| } |
| |
| |
| switch (cmd) { |
| case SET_KEY: |
| if (is_default_wep_key) { |
| ret = iwl_set_default_wep_key(priv, vif_priv->ctx, key); |
| break; |
| } |
| ret = iwl_set_dynamic_key(priv, vif_priv->ctx, key, sta); |
| if (ret) { |
| /* |
| * can't add key for RX, but we don't need it |
| * in the device for TX so still return 0 |
| */ |
| ret = 0; |
| key->hw_key_idx = WEP_INVALID_OFFSET; |
| } |
| |
| IWL_DEBUG_MAC80211(priv, "enable hwcrypto key\n"); |
| break; |
| case DISABLE_KEY: |
| if (is_default_wep_key) |
| ret = iwl_remove_default_wep_key(priv, ctx, key); |
| else |
| ret = iwl_remove_dynamic_key(priv, ctx, key, sta); |
| |
| IWL_DEBUG_MAC80211(priv, "disable hwcrypto key\n"); |
| break; |
| default: |
| ret = -EINVAL; |
| } |
| |
| mutex_unlock(&priv->mutex); |
| IWL_DEBUG_MAC80211(priv, "leave\n"); |
| |
| return ret; |
| } |
| |
| static inline bool iwl_enable_rx_ampdu(const struct iwl_cfg *cfg) |
| { |
| if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG) |
| return false; |
| return true; |
| } |
| |
| static inline bool iwl_enable_tx_ampdu(const struct iwl_cfg *cfg) |
| { |
| if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG) |
| return false; |
| if (iwlwifi_mod_params.disable_11n & IWL_ENABLE_HT_TXAGG) |
| return true; |
| |
| /* disabled by default */ |
| return false; |
| } |
| |
| static int iwlagn_mac_ampdu_action(struct ieee80211_hw *hw, |
| struct ieee80211_vif *vif, |
| enum ieee80211_ampdu_mlme_action action, |
| struct ieee80211_sta *sta, u16 tid, u16 *ssn, |
| u8 buf_size) |
| { |
| struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); |
| int ret = -EINVAL; |
| struct iwl_station_priv *sta_priv = (void *) sta->drv_priv; |
| |
| IWL_DEBUG_HT(priv, "A-MPDU action on addr %pM tid %d\n", |
| sta->addr, tid); |
| |
| if (!(priv->nvm_data->sku_cap_11n_enable)) |
| return -EACCES; |
| |
| IWL_DEBUG_MAC80211(priv, "enter\n"); |
| mutex_lock(&priv->mutex); |
| |
| switch (action) { |
| case IEEE80211_AMPDU_RX_START: |
| if (!iwl_enable_rx_ampdu(priv->cfg)) |
| break; |
| IWL_DEBUG_HT(priv, "start Rx\n"); |
| ret = iwl_sta_rx_agg_start(priv, sta, tid, *ssn); |
| break; |
| case IEEE80211_AMPDU_RX_STOP: |
| IWL_DEBUG_HT(priv, "stop Rx\n"); |
| ret = iwl_sta_rx_agg_stop(priv, sta, tid); |
| break; |
| case IEEE80211_AMPDU_TX_START: |
| if (!priv->trans->ops->txq_enable) |
| break; |
| if (!iwl_enable_tx_ampdu(priv->cfg)) |
| break; |
| IWL_DEBUG_HT(priv, "start Tx\n"); |
| ret = iwlagn_tx_agg_start(priv, vif, sta, tid, ssn); |
| break; |
| case IEEE80211_AMPDU_TX_STOP_FLUSH: |
| case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT: |
| IWL_DEBUG_HT(priv, "Flush Tx\n"); |
| ret = iwlagn_tx_agg_flush(priv, vif, sta, tid); |
| break; |
| case IEEE80211_AMPDU_TX_STOP_CONT: |
| IWL_DEBUG_HT(priv, "stop Tx\n"); |
| ret = iwlagn_tx_agg_stop(priv, vif, sta, tid); |
| if ((ret == 0) && (priv->agg_tids_count > 0)) { |
| priv->agg_tids_count--; |
| IWL_DEBUG_HT(priv, "priv->agg_tids_count = %u\n", |
| priv->agg_tids_count); |
| } |
| if (!priv->agg_tids_count && |
| priv->hw_params.use_rts_for_aggregation) { |
| /* |
| * switch off RTS/CTS if it was previously enabled |
| */ |
| sta_priv->lq_sta.lq.general_params.flags &= |
| ~LINK_QUAL_FLAGS_SET_STA_TLC_RTS_MSK; |
| iwl_send_lq_cmd(priv, iwl_rxon_ctx_from_vif(vif), |
| &sta_priv->lq_sta.lq, CMD_ASYNC, false); |
| } |
| break; |
| case IEEE80211_AMPDU_TX_OPERATIONAL: |
| ret = iwlagn_tx_agg_oper(priv, vif, sta, tid, buf_size); |
| break; |
| } |
| mutex_unlock(&priv->mutex); |
| IWL_DEBUG_MAC80211(priv, "leave\n"); |
| return ret; |
| } |
| |
| static int iwlagn_mac_sta_add(struct ieee80211_hw *hw, |
| struct ieee80211_vif *vif, |
| struct ieee80211_sta *sta) |
| { |
| struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); |
| struct iwl_station_priv *sta_priv = (void *)sta->drv_priv; |
| struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv; |
| bool is_ap = vif->type == NL80211_IFTYPE_STATION; |
| int ret; |
| u8 sta_id; |
| |
| IWL_DEBUG_INFO(priv, "proceeding to add station %pM\n", |
| sta->addr); |
| sta_priv->sta_id = IWL_INVALID_STATION; |
| |
| atomic_set(&sta_priv->pending_frames, 0); |
| if (vif->type == NL80211_IFTYPE_AP) |
| sta_priv->client = true; |
| |
| ret = iwl_add_station_common(priv, vif_priv->ctx, sta->addr, |
| is_ap, sta, &sta_id); |
| if (ret) { |
| IWL_ERR(priv, "Unable to add station %pM (%d)\n", |
| sta->addr, ret); |
| /* Should we return success if return code is EEXIST ? */ |
| return ret; |
| } |
| |
| sta_priv->sta_id = sta_id; |
| |
| return 0; |
| } |
| |
| static int iwlagn_mac_sta_remove(struct ieee80211_hw *hw, |
| struct ieee80211_vif *vif, |
| struct ieee80211_sta *sta) |
| { |
| struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); |
| struct iwl_station_priv *sta_priv = (void *)sta->drv_priv; |
| int ret; |
| |
| IWL_DEBUG_INFO(priv, "proceeding to remove station %pM\n", sta->addr); |
| |
| if (vif->type == NL80211_IFTYPE_STATION) { |
| /* |
| * Station will be removed from device when the RXON |
| * is set to unassociated -- just deactivate it here |
| * to avoid re-programming it. |
| */ |
| ret = 0; |
| iwl_deactivate_station(priv, sta_priv->sta_id, sta->addr); |
| } else { |
| ret = iwl_remove_station(priv, sta_priv->sta_id, sta->addr); |
| if (ret) |
| IWL_DEBUG_QUIET_RFKILL(priv, |
| "Error removing station %pM\n", sta->addr); |
| } |
| return ret; |
| } |
| |
| static int iwlagn_mac_sta_state(struct ieee80211_hw *hw, |
| struct ieee80211_vif *vif, |
| struct ieee80211_sta *sta, |
| enum ieee80211_sta_state old_state, |
| enum ieee80211_sta_state new_state) |
| { |
| struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); |
| struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv; |
| enum { |
| NONE, ADD, REMOVE, HT_RATE_INIT, ADD_RATE_INIT, |
| } op = NONE; |
| int ret; |
| |
| IWL_DEBUG_MAC80211(priv, "station %pM state change %d->%d\n", |
| sta->addr, old_state, new_state); |
| |
| mutex_lock(&priv->mutex); |
| if (vif->type == NL80211_IFTYPE_STATION) { |
| if (old_state == IEEE80211_STA_NOTEXIST && |
| new_state == IEEE80211_STA_NONE) |
| op = ADD; |
| else if (old_state == IEEE80211_STA_NONE && |
| new_state == IEEE80211_STA_NOTEXIST) |
| op = REMOVE; |
| else if (old_state == IEEE80211_STA_AUTH && |
| new_state == IEEE80211_STA_ASSOC) |
| op = HT_RATE_INIT; |
| } else { |
| if (old_state == IEEE80211_STA_AUTH && |
| new_state == IEEE80211_STA_ASSOC) |
| op = ADD_RATE_INIT; |
| else if (old_state == IEEE80211_STA_ASSOC && |
| new_state == IEEE80211_STA_AUTH) |
| op = REMOVE; |
| } |
| |
| switch (op) { |
| case ADD: |
| ret = iwlagn_mac_sta_add(hw, vif, sta); |
| if (ret) |
| break; |
| /* |
| * Clear the in-progress flag, the AP station entry was added |
| * but we'll initialize LQ only when we've associated (which |
| * would also clear the in-progress flag). This is necessary |
| * in case we never initialize LQ because association fails. |
| */ |
| spin_lock_bh(&priv->sta_lock); |
| priv->stations[iwl_sta_id(sta)].used &= |
| ~IWL_STA_UCODE_INPROGRESS; |
| spin_unlock_bh(&priv->sta_lock); |
| break; |
| case REMOVE: |
| ret = iwlagn_mac_sta_remove(hw, vif, sta); |
| break; |
| case ADD_RATE_INIT: |
| ret = iwlagn_mac_sta_add(hw, vif, sta); |
| if (ret) |
| break; |
| /* Initialize rate scaling */ |
| IWL_DEBUG_INFO(priv, |
| "Initializing rate scaling for station %pM\n", |
| sta->addr); |
| iwl_rs_rate_init(priv, sta, iwl_sta_id(sta)); |
| ret = 0; |
| break; |
| case HT_RATE_INIT: |
| /* Initialize rate scaling */ |
| ret = iwl_sta_update_ht(priv, vif_priv->ctx, sta); |
| if (ret) |
| break; |
| IWL_DEBUG_INFO(priv, |
| "Initializing rate scaling for station %pM\n", |
| sta->addr); |
| iwl_rs_rate_init(priv, sta, iwl_sta_id(sta)); |
| ret = 0; |
| break; |
| default: |
| ret = 0; |
| break; |
| } |
| |
| /* |
| * mac80211 might WARN if we fail, but due the way we |
| * (badly) handle hard rfkill, we might fail here |
| */ |
| if (iwl_is_rfkill(priv)) |
| ret = 0; |
| |
| mutex_unlock(&priv->mutex); |
| IWL_DEBUG_MAC80211(priv, "leave\n"); |
| |
| return ret; |
| } |
| |
| static void iwlagn_mac_channel_switch(struct ieee80211_hw *hw, |
| struct ieee80211_vif *vif, |
| struct ieee80211_channel_switch *ch_switch) |
| { |
| struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); |
| struct ieee80211_conf *conf = &hw->conf; |
| struct ieee80211_channel *channel = ch_switch->chandef.chan; |
| struct iwl_ht_config *ht_conf = &priv->current_ht_config; |
| /* |
| * MULTI-FIXME |
| * When we add support for multiple interfaces, we need to |
| * revisit this. The channel switch command in the device |
| * only affects the BSS context, but what does that really |
| * mean? And what if we get a CSA on the second interface? |
| * This needs a lot of work. |
| */ |
| struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS]; |
| u16 ch; |
| |
| IWL_DEBUG_MAC80211(priv, "enter\n"); |
| |
| mutex_lock(&priv->mutex); |
| |
| if (iwl_is_rfkill(priv)) |
| goto out; |
| |
| if (test_bit(STATUS_EXIT_PENDING, &priv->status) || |
| test_bit(STATUS_SCANNING, &priv->status) || |
| test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status)) |
| goto out; |
| |
| if (!iwl_is_associated_ctx(ctx)) |
| goto out; |
| |
| if (!priv->lib->set_channel_switch) |
| goto out; |
| |
| ch = channel->hw_value; |
| if (le16_to_cpu(ctx->active.channel) == ch) |
| goto out; |
| |
| priv->current_ht_config.smps = conf->smps_mode; |
| |
| /* Configure HT40 channels */ |
| switch (cfg80211_get_chandef_type(&ch_switch->chandef)) { |
| case NL80211_CHAN_NO_HT: |
| case NL80211_CHAN_HT20: |
| ctx->ht.is_40mhz = false; |
| ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE; |
| break; |
| case NL80211_CHAN_HT40MINUS: |
| ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_BELOW; |
| ctx->ht.is_40mhz = true; |
| break; |
| case NL80211_CHAN_HT40PLUS: |
| ctx->ht.extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_ABOVE; |
| ctx->ht.is_40mhz = true; |
| break; |
| } |
| |
| if ((le16_to_cpu(ctx->staging.channel) != ch)) |
| ctx->staging.flags = 0; |
| |
| iwl_set_rxon_channel(priv, channel, ctx); |
| iwl_set_rxon_ht(priv, ht_conf); |
| iwl_set_flags_for_band(priv, ctx, channel->band, ctx->vif); |
| |
| /* |
| * at this point, staging_rxon has the |
| * configuration for channel switch |
| */ |
| set_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status); |
| priv->switch_channel = cpu_to_le16(ch); |
| if (priv->lib->set_channel_switch(priv, ch_switch)) { |
| clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status); |
| priv->switch_channel = 0; |
| ieee80211_chswitch_done(ctx->vif, false); |
| } |
| |
| out: |
| mutex_unlock(&priv->mutex); |
| IWL_DEBUG_MAC80211(priv, "leave\n"); |
| } |
| |
| void iwl_chswitch_done(struct iwl_priv *priv, bool is_success) |
| { |
| /* |
| * MULTI-FIXME |
| * See iwlagn_mac_channel_switch. |
| */ |
| struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS]; |
| |
| if (test_bit(STATUS_EXIT_PENDING, &priv->status)) |
| return; |
| |
| if (!test_and_clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status)) |
| return; |
| |
| if (ctx->vif) |
| ieee80211_chswitch_done(ctx->vif, is_success); |
| } |
| |
| static void iwlagn_configure_filter(struct ieee80211_hw *hw, |
| unsigned int changed_flags, |
| unsigned int *total_flags, |
| u64 multicast) |
| { |
| struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); |
| __le32 filter_or = 0, filter_nand = 0; |
| struct iwl_rxon_context *ctx; |
| |
| #define CHK(test, flag) do { \ |
| if (*total_flags & (test)) \ |
| filter_or |= (flag); \ |
| else \ |
| filter_nand |= (flag); \ |
| } while (0) |
| |
| IWL_DEBUG_MAC80211(priv, "Enter: changed: 0x%x, total: 0x%x\n", |
| changed_flags, *total_flags); |
| |
| CHK(FIF_OTHER_BSS, RXON_FILTER_PROMISC_MSK); |
| /* Setting _just_ RXON_FILTER_CTL2HOST_MSK causes FH errors */ |
| CHK(FIF_CONTROL, RXON_FILTER_CTL2HOST_MSK | RXON_FILTER_PROMISC_MSK); |
| CHK(FIF_BCN_PRBRESP_PROMISC, RXON_FILTER_BCON_AWARE_MSK); |
| |
| #undef CHK |
| |
| mutex_lock(&priv->mutex); |
| |
| for_each_context(priv, ctx) { |
| ctx->staging.filter_flags &= ~filter_nand; |
| ctx->staging.filter_flags |= filter_or; |
| |
| /* |
| * Not committing directly because hardware can perform a scan, |
| * but we'll eventually commit the filter flags change anyway. |
| */ |
| } |
| |
| mutex_unlock(&priv->mutex); |
| |
| /* |
| * Receiving all multicast frames is always enabled by the |
| * default flags setup in iwl_connection_init_rx_config() |
| * since we currently do not support programming multicast |
| * filters into the device. |
| */ |
| *total_flags &= FIF_OTHER_BSS | FIF_ALLMULTI | |
| FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL; |
| } |
| |
| static void iwlagn_mac_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif, |
| u32 queues, bool drop) |
| { |
| struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); |
| u32 scd_queues; |
| |
| mutex_lock(&priv->mutex); |
| IWL_DEBUG_MAC80211(priv, "enter\n"); |
| |
| if (test_bit(STATUS_EXIT_PENDING, &priv->status)) { |
| IWL_DEBUG_TX(priv, "Aborting flush due to device shutdown\n"); |
| goto done; |
| } |
| if (iwl_is_rfkill(priv)) { |
| IWL_DEBUG_TX(priv, "Aborting flush due to RF Kill\n"); |
| goto done; |
| } |
| |
| scd_queues = BIT(priv->cfg->base_params->num_of_queues) - 1; |
| scd_queues &= ~(BIT(IWL_IPAN_CMD_QUEUE_NUM) | |
| BIT(IWL_DEFAULT_CMD_QUEUE_NUM)); |
| |
| if (drop) { |
| IWL_DEBUG_TX_QUEUES(priv, "Flushing SCD queues: 0x%x\n", |
| scd_queues); |
| if (iwlagn_txfifo_flush(priv, scd_queues)) { |
| IWL_ERR(priv, "flush request fail\n"); |
| goto done; |
| } |
| } |
| |
| IWL_DEBUG_TX_QUEUES(priv, "wait transmit/flush all frames\n"); |
| iwl_trans_wait_tx_queue_empty(priv->trans, scd_queues); |
| done: |
| mutex_unlock(&priv->mutex); |
| IWL_DEBUG_MAC80211(priv, "leave\n"); |
| } |
| |
| static void iwlagn_mac_event_callback(struct ieee80211_hw *hw, |
| struct ieee80211_vif *vif, |
| const struct ieee80211_event *event) |
| { |
| struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); |
| |
| if (event->type != RSSI_EVENT) |
| return; |
| |
| IWL_DEBUG_MAC80211(priv, "enter\n"); |
| |
| if (priv->lib->bt_params && |
| priv->lib->bt_params->advanced_bt_coexist) { |
| if (event->u.rssi.data == RSSI_EVENT_LOW) |
| priv->bt_enable_pspoll = true; |
| else if (event->u.rssi.data == RSSI_EVENT_HIGH) |
| priv->bt_enable_pspoll = false; |
| |
| queue_work(priv->workqueue, &priv->bt_runtime_config); |
| } else { |
| IWL_DEBUG_MAC80211(priv, "Advanced BT coex disabled," |
| "ignoring RSSI callback\n"); |
| } |
| |
| IWL_DEBUG_MAC80211(priv, "leave\n"); |
| } |
| |
| static int iwlagn_mac_set_tim(struct ieee80211_hw *hw, |
| struct ieee80211_sta *sta, bool set) |
| { |
| struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); |
| |
| queue_work(priv->workqueue, &priv->beacon_update); |
| |
| return 0; |
| } |
| |
| static int iwlagn_mac_conf_tx(struct ieee80211_hw *hw, |
| struct ieee80211_vif *vif, u16 queue, |
| const struct ieee80211_tx_queue_params *params) |
| { |
| struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); |
| struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv; |
| struct iwl_rxon_context *ctx = vif_priv->ctx; |
| int q; |
| |
| if (WARN_ON(!ctx)) |
| return -EINVAL; |
| |
| IWL_DEBUG_MAC80211(priv, "enter\n"); |
| |
| if (!iwl_is_ready_rf(priv)) { |
| IWL_DEBUG_MAC80211(priv, "leave - RF not ready\n"); |
| return -EIO; |
| } |
| |
| if (queue >= AC_NUM) { |
| IWL_DEBUG_MAC80211(priv, "leave - queue >= AC_NUM %d\n", queue); |
| return 0; |
| } |
| |
| q = AC_NUM - 1 - queue; |
| |
| mutex_lock(&priv->mutex); |
| |
| ctx->qos_data.def_qos_parm.ac[q].cw_min = |
| cpu_to_le16(params->cw_min); |
| ctx->qos_data.def_qos_parm.ac[q].cw_max = |
| cpu_to_le16(params->cw_max); |
| ctx->qos_data.def_qos_parm.ac[q].aifsn = params->aifs; |
| ctx->qos_data.def_qos_parm.ac[q].edca_txop = |
| cpu_to_le16((params->txop * 32)); |
| |
| ctx->qos_data.def_qos_parm.ac[q].reserved1 = 0; |
| |
| mutex_unlock(&priv->mutex); |
| |
| IWL_DEBUG_MAC80211(priv, "leave\n"); |
| return 0; |
| } |
| |
| static int iwlagn_mac_tx_last_beacon(struct ieee80211_hw *hw) |
| { |
| struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); |
| |
| return priv->ibss_manager == IWL_IBSS_MANAGER; |
| } |
| |
| static int iwl_set_mode(struct iwl_priv *priv, struct iwl_rxon_context *ctx) |
| { |
| iwl_connection_init_rx_config(priv, ctx); |
| |
| iwlagn_set_rxon_chain(priv, ctx); |
| |
| return iwlagn_commit_rxon(priv, ctx); |
| } |
| |
| static int iwl_setup_interface(struct iwl_priv *priv, |
| struct iwl_rxon_context *ctx) |
| { |
| struct ieee80211_vif *vif = ctx->vif; |
| int err, ac; |
| |
| lockdep_assert_held(&priv->mutex); |
| |
| /* |
| * This variable will be correct only when there's just |
| * a single context, but all code using it is for hardware |
| * that supports only one context. |
| */ |
| priv->iw_mode = vif->type; |
| |
| ctx->is_active = true; |
| |
| err = iwl_set_mode(priv, ctx); |
| if (err) { |
| if (!ctx->always_active) |
| ctx->is_active = false; |
| return err; |
| } |
| |
| if (priv->lib->bt_params && priv->lib->bt_params->advanced_bt_coexist && |
| vif->type == NL80211_IFTYPE_ADHOC) { |
| /* |
| * pretend to have high BT traffic as long as we |
| * are operating in IBSS mode, as this will cause |
| * the rate scaling etc. to behave as intended. |
| */ |
| priv->bt_traffic_load = IWL_BT_COEX_TRAFFIC_LOAD_HIGH; |
| } |
| |
| /* set up queue mappings */ |
| for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) |
| vif->hw_queue[ac] = ctx->ac_to_queue[ac]; |
| |
| if (vif->type == NL80211_IFTYPE_AP) |
| vif->cab_queue = ctx->mcast_queue; |
| else |
| vif->cab_queue = IEEE80211_INVAL_HW_QUEUE; |
| |
| return 0; |
| } |
| |
| static int iwlagn_mac_add_interface(struct ieee80211_hw *hw, |
| struct ieee80211_vif *vif) |
| { |
| struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); |
| struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv; |
| struct iwl_rxon_context *tmp, *ctx = NULL; |
| int err; |
| enum nl80211_iftype viftype = ieee80211_vif_type_p2p(vif); |
| bool reset = false; |
| |
| IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n", |
| viftype, vif->addr); |
| |
| mutex_lock(&priv->mutex); |
| |
| if (!iwl_is_ready_rf(priv)) { |
| IWL_WARN(priv, "Try to add interface when device not ready\n"); |
| err = -EINVAL; |
| goto out; |
| } |
| |
| for_each_context(priv, tmp) { |
| u32 possible_modes = |
| tmp->interface_modes | tmp->exclusive_interface_modes; |
| |
| if (tmp->vif) { |
| /* On reset we need to add the same interface again */ |
| if (tmp->vif == vif) { |
| reset = true; |
| ctx = tmp; |
| break; |
| } |
| |
| /* check if this busy context is exclusive */ |
| if (tmp->exclusive_interface_modes & |
| BIT(tmp->vif->type)) { |
| err = -EINVAL; |
| goto out; |
| } |
| continue; |
| } |
| |
| if (!(possible_modes & BIT(viftype))) |
| continue; |
| |
| /* have maybe usable context w/o interface */ |
| ctx = tmp; |
| break; |
| } |
| |
| if (!ctx) { |
| err = -EOPNOTSUPP; |
| goto out; |
| } |
| |
| vif_priv->ctx = ctx; |
| ctx->vif = vif; |
| |
| /* |
| * In SNIFFER device type, the firmware reports the FCS to |
| * the host, rather than snipping it off. Unfortunately, |
| * mac80211 doesn't (yet) provide a per-packet flag for |
| * this, so that we have to set the hardware flag based |
| * on the interfaces added. As the monitor interface can |
| * only be present by itself, and will be removed before |
| * other interfaces are added, this is safe. |
| */ |
| if (vif->type == NL80211_IFTYPE_MONITOR) |
| priv->hw->flags |= IEEE80211_HW_RX_INCLUDES_FCS; |
| else |
| priv->hw->flags &= ~IEEE80211_HW_RX_INCLUDES_FCS; |
| |
| err = iwl_setup_interface(priv, ctx); |
| if (!err || reset) |
| goto out; |
| |
| ctx->vif = NULL; |
| priv->iw_mode = NL80211_IFTYPE_STATION; |
| out: |
| mutex_unlock(&priv->mutex); |
| |
| IWL_DEBUG_MAC80211(priv, "leave\n"); |
| return err; |
| } |
| |
| static void iwl_teardown_interface(struct iwl_priv *priv, |
| struct ieee80211_vif *vif, |
| bool mode_change) |
| { |
| struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif); |
| |
| lockdep_assert_held(&priv->mutex); |
| |
| if (priv->scan_vif == vif) { |
| iwl_scan_cancel_timeout(priv, 200); |
| iwl_force_scan_end(priv); |
| } |
| |
| if (!mode_change) { |
| iwl_set_mode(priv, ctx); |
| if (!ctx->always_active) |
| ctx->is_active = false; |
| } |
| |
| /* |
| * When removing the IBSS interface, overwrite the |
| * BT traffic load with the stored one from the last |
| * notification, if any. If this is a device that |
| * doesn't implement this, this has no effect since |
| * both values are the same and zero. |
| */ |
| if (vif->type == NL80211_IFTYPE_ADHOC) |
| priv->bt_traffic_load = priv->last_bt_traffic_load; |
| } |
| |
| static void iwlagn_mac_remove_interface(struct ieee80211_hw *hw, |
| struct ieee80211_vif *vif) |
| { |
| struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); |
| struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif); |
| |
| IWL_DEBUG_MAC80211(priv, "enter\n"); |
| |
| mutex_lock(&priv->mutex); |
| |
| if (WARN_ON(ctx->vif != vif)) { |
| struct iwl_rxon_context *tmp; |
| IWL_ERR(priv, "ctx->vif = %p, vif = %p\n", ctx->vif, vif); |
| for_each_context(priv, tmp) |
| IWL_ERR(priv, "\tID = %d:\tctx = %p\tctx->vif = %p\n", |
| tmp->ctxid, tmp, tmp->vif); |
| } |
| ctx->vif = NULL; |
| |
| iwl_teardown_interface(priv, vif, false); |
| |
| mutex_unlock(&priv->mutex); |
| |
| IWL_DEBUG_MAC80211(priv, "leave\n"); |
| |
| } |
| |
| static int iwlagn_mac_change_interface(struct ieee80211_hw *hw, |
| struct ieee80211_vif *vif, |
| enum nl80211_iftype newtype, bool newp2p) |
| { |
| struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); |
| struct iwl_rxon_context *ctx, *tmp; |
| enum nl80211_iftype newviftype = newtype; |
| u32 interface_modes; |
| int err; |
| |
| IWL_DEBUG_MAC80211(priv, "enter\n"); |
| |
| newtype = ieee80211_iftype_p2p(newtype, newp2p); |
| |
| mutex_lock(&priv->mutex); |
| |
| ctx = iwl_rxon_ctx_from_vif(vif); |
| |
| /* |
| * To simplify this code, only support changes on the |
| * BSS context. The PAN context is usually reassigned |
| * by creating/removing P2P interfaces anyway. |
| */ |
| if (ctx->ctxid != IWL_RXON_CTX_BSS) { |
| err = -EBUSY; |
| goto out; |
| } |
| |
| if (!ctx->vif || !iwl_is_ready_rf(priv)) { |
| /* |
| * Huh? But wait ... this can maybe happen when |
| * we're in the middle of a firmware restart! |
| */ |
| err = -EBUSY; |
| goto out; |
| } |
| |
| /* Check if the switch is supported in the same context */ |
| interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes; |
| if (!(interface_modes & BIT(newtype))) { |
| err = -EBUSY; |
| goto out; |
| } |
| |
| if (ctx->exclusive_interface_modes & BIT(newtype)) { |
| for_each_context(priv, tmp) { |
| if (ctx == tmp) |
| continue; |
| |
| if (!tmp->is_active) |
| continue; |
| |
| /* |
| * The current mode switch would be exclusive, but |
| * another context is active ... refuse the switch. |
| */ |
| err = -EBUSY; |
| goto out; |
| } |
| } |
| |
| /* success */ |
| iwl_teardown_interface(priv, vif, true); |
| vif->type = newviftype; |
| vif->p2p = newp2p; |
| err = iwl_setup_interface(priv, ctx); |
| WARN_ON(err); |
| /* |
| * We've switched internally, but submitting to the |
| * device may have failed for some reason. Mask this |
| * error, because otherwise mac80211 will not switch |
| * (and set the interface type back) and we'll be |
| * out of sync with it. |
| */ |
| err = 0; |
| |
| out: |
| mutex_unlock(&priv->mutex); |
| IWL_DEBUG_MAC80211(priv, "leave\n"); |
| |
| return err; |
| } |
| |
| static int iwlagn_mac_hw_scan(struct ieee80211_hw *hw, |
| struct ieee80211_vif *vif, |
| struct ieee80211_scan_request *hw_req) |
| { |
| struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); |
| struct cfg80211_scan_request *req = &hw_req->req; |
| int ret; |
| |
| IWL_DEBUG_MAC80211(priv, "enter\n"); |
| |
| if (req->n_channels == 0) |
| return -EINVAL; |
| |
| mutex_lock(&priv->mutex); |
| |
| /* |
| * If an internal scan is in progress, just set |
| * up the scan_request as per above. |
| */ |
| if (priv->scan_type != IWL_SCAN_NORMAL) { |
| IWL_DEBUG_SCAN(priv, |
| "SCAN request during internal scan - defer\n"); |
| priv->scan_request = req; |
| priv->scan_vif = vif; |
| ret = 0; |
| } else { |
| priv->scan_request = req; |
| priv->scan_vif = vif; |
| /* |
| * mac80211 will only ask for one band at a time |
| * so using channels[0] here is ok |
| */ |
| ret = iwl_scan_initiate(priv, vif, IWL_SCAN_NORMAL, |
| req->channels[0]->band); |
| if (ret) { |
| priv->scan_request = NULL; |
| priv->scan_vif = NULL; |
| } |
| } |
| |
| IWL_DEBUG_MAC80211(priv, "leave\n"); |
| |
| mutex_unlock(&priv->mutex); |
| |
| return ret; |
| } |
| |
| static void iwl_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id) |
| { |
| struct iwl_addsta_cmd cmd = { |
| .mode = STA_CONTROL_MODIFY_MSK, |
| .station_flags_msk = STA_FLG_PWR_SAVE_MSK, |
| .sta.sta_id = sta_id, |
| }; |
| |
| iwl_send_add_sta(priv, &cmd, CMD_ASYNC); |
| } |
| |
| static void iwlagn_mac_sta_notify(struct ieee80211_hw *hw, |
| struct ieee80211_vif *vif, |
| enum sta_notify_cmd cmd, |
| struct ieee80211_sta *sta) |
| { |
| struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); |
| struct iwl_station_priv *sta_priv = (void *)sta->drv_priv; |
| int sta_id; |
| |
| IWL_DEBUG_MAC80211(priv, "enter\n"); |
| |
| switch (cmd) { |
| case STA_NOTIFY_SLEEP: |
| WARN_ON(!sta_priv->client); |
| sta_priv->asleep = true; |
| if (atomic_read(&sta_priv->pending_frames) > 0) |
| ieee80211_sta_block_awake(hw, sta, true); |
| break; |
| case STA_NOTIFY_AWAKE: |
| WARN_ON(!sta_priv->client); |
| if (!sta_priv->asleep) |
| break; |
| sta_priv->asleep = false; |
| sta_id = iwl_sta_id(sta); |
| if (sta_id != IWL_INVALID_STATION) |
| iwl_sta_modify_ps_wake(priv, sta_id); |
| break; |
| default: |
| break; |
| } |
| IWL_DEBUG_MAC80211(priv, "leave\n"); |
| } |
| |
| const struct ieee80211_ops iwlagn_hw_ops = { |
| .tx = iwlagn_mac_tx, |
| .start = iwlagn_mac_start, |
| .stop = iwlagn_mac_stop, |
| #ifdef CONFIG_PM_SLEEP |
| .suspend = iwlagn_mac_suspend, |
| .resume = iwlagn_mac_resume, |
| .set_wakeup = iwlagn_mac_set_wakeup, |
| #endif |
| .add_interface = iwlagn_mac_add_interface, |
| .remove_interface = iwlagn_mac_remove_interface, |
| .change_interface = iwlagn_mac_change_interface, |
| .config = iwlagn_mac_config, |
| .configure_filter = iwlagn_configure_filter, |
| .set_key = iwlagn_mac_set_key, |
| .update_tkip_key = iwlagn_mac_update_tkip_key, |
| .set_rekey_data = iwlagn_mac_set_rekey_data, |
| .conf_tx = iwlagn_mac_conf_tx, |
| .bss_info_changed = iwlagn_bss_info_changed, |
| .ampdu_action = iwlagn_mac_ampdu_action, |
| .hw_scan = iwlagn_mac_hw_scan, |
| .sta_notify = iwlagn_mac_sta_notify, |
| .sta_state = iwlagn_mac_sta_state, |
| .channel_switch = iwlagn_mac_channel_switch, |
| .flush = iwlagn_mac_flush, |
| .tx_last_beacon = iwlagn_mac_tx_last_beacon, |
| .event_callback = iwlagn_mac_event_callback, |
| .set_tim = iwlagn_mac_set_tim, |
| }; |
| |
| /* This function both allocates and initializes hw and priv. */ |
| struct ieee80211_hw *iwl_alloc_all(void) |
| { |
| struct iwl_priv *priv; |
| struct iwl_op_mode *op_mode; |
| /* mac80211 allocates memory for this device instance, including |
| * space for this driver's private structure */ |
| struct ieee80211_hw *hw; |
| |
| hw = ieee80211_alloc_hw(sizeof(struct iwl_priv) + |
| sizeof(struct iwl_op_mode), &iwlagn_hw_ops); |
| if (!hw) |
| goto out; |
| |
| op_mode = hw->priv; |
| priv = IWL_OP_MODE_GET_DVM(op_mode); |
| priv->hw = hw; |
| |
| out: |
| return hw; |
| } |