/****************************************************************************** * * Copyright(c) 2003 - 2012 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 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 * *****************************************************************************/ #include #include #include #include #include #include #include #include #include #include #include #include #include #include "iwl-eeprom.h" #include "iwl-dev.h" #include "iwl-core.h" #include "iwl-io.h" #include "iwl-agn-calib.h" #include "iwl-agn.h" #include "iwl-shared.h" #include "iwl-trans.h" #include "iwl-op-mode.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_limit iwlagn_p2p_sta_go_limits[] = { { .max = 1, .types = BIT(NL80211_IFTYPE_STATION), }, { .max = 1, .types = BIT(NL80211_IFTYPE_P2P_GO) | BIT(NL80211_IFTYPE_AP), }, }; static const struct ieee80211_iface_limit iwlagn_p2p_2sta_limits[] = { { .max = 2, .types = BIT(NL80211_IFTYPE_STATION), }, { .max = 1, .types = BIT(NL80211_IFTYPE_P2P_CLIENT), }, }; 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), }, }; static const struct ieee80211_iface_combination iwlagn_iface_combinations_p2p[] = { { .num_different_channels = 1, .max_interfaces = 2, .beacon_int_infra_match = true, .limits = iwlagn_p2p_sta_go_limits, .n_limits = ARRAY_SIZE(iwlagn_p2p_sta_go_limits), }, { .num_different_channels = 1, .max_interfaces = 2, .limits = iwlagn_p2p_2sta_limits, .n_limits = ARRAY_SIZE(iwlagn_p2p_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_PERIOD | IEEE80211_HW_SPECTRUM_MGMT | IEEE80211_HW_REPORTS_TX_ACK_STATUS; /* * 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; */ hw->flags |= IEEE80211_HW_SUPPORTS_PS | IEEE80211_HW_SUPPORTS_DYNAMIC_PS; if (hw_params(priv).sku & EEPROM_SKU_CAP_11N_ENABLE) hw->flags |= IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS | IEEE80211_HW_SUPPORTS_STATIC_SMPS; if (capa->flags & IWL_UCODE_TLV_FLAGS_MFP) 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_P2P_CLIENT)) { hw->wiphy->iface_combinations = iwlagn_iface_combinations_p2p; hw->wiphy->n_iface_combinations = ARRAY_SIZE(iwlagn_iface_combinations_p2p); } else 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->max_remain_on_channel_duration = 1000; hw->wiphy->flags |= WIPHY_FLAG_CUSTOM_REGULATORY | WIPHY_FLAG_DISABLE_BEACON_HINTS | WIPHY_FLAG_IBSS_RSN; if (priv->fw->ucode_wowlan.code.len && trans(priv)->ops->wowlan_suspend && device_can_wakeup(trans(priv)->dev)) { hw->wiphy->wowlan.flags = WIPHY_WOWLAN_MAGIC_PKT | WIPHY_WOWLAN_DISCONNECT | WIPHY_WOWLAN_EAP_IDENTITY_REQ | WIPHY_WOWLAN_RFKILL_RELEASE; if (!iwlagn_mod_params.sw_crypto) hw->wiphy->wowlan.flags |= WIPHY_WOWLAN_SUPPORTS_GTK_REKEY | WIPHY_WOWLAN_GTK_REKEY_FAILURE; hw->wiphy->wowlan.n_patterns = IWLAGN_WOWLAN_MAX_PATTERNS; hw->wiphy->wowlan.pattern_min_len = IWLAGN_WOWLAN_MIN_PATTERN_LEN; hw->wiphy->wowlan.pattern_max_len = IWLAGN_WOWLAN_MAX_PATTERN_LEN; } if (iwlagn_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 zero-length SSID element */ hw->wiphy->max_scan_ie_len = capa->max_probe_length - 24 - 2; /* Default value; 4 EDCA QOS priorities */ hw->queues = 4; hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL; if (priv->bands[IEEE80211_BAND_2GHZ].n_channels) priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &priv->bands[IEEE80211_BAND_2GHZ]; if (priv->bands[IEEE80211_BAND_5GHZ].n_channels) priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] = &priv->bands[IEEE80211_BAND_5GHZ]; hw->wiphy->hw_version = trans(priv)->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); 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->shrd->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->shrd->status); iwl_down(priv); clear_bit(STATUS_EXIT_PENDING, &priv->shrd->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->shrd->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); /* User space software may expect getting rfkill changes * even if interface is down, trans->down will leave the RF * kill interrupt enabled */ iwl_trans_stop_hw(trans(priv)); 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 (iwlagn_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, hw, wowlan); if (ret) goto error; device_set_wakeup_enable(trans(priv)->dev, true); iwl_trans_wowlan_suspend(trans(priv)); 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; } 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; unsigned long flags; u32 base, status = 0xffffffff; int ret = -EIO; IWL_DEBUG_MAC80211(priv, "enter\n"); mutex_lock(&priv->mutex); iwl_write32(trans(priv), CSR_UCODE_DRV_GP1_CLR, CSR_UCODE_DRV_GP1_BIT_D3_CFG_COMPLETE); base = priv->shrd->device_pointers.error_event_table; if (iwlagn_hw_valid_rtc_data_addr(base)) { spin_lock_irqsave(&trans(priv)->reg_lock, flags); ret = iwl_grab_nic_access_silent(trans(priv)); if (ret == 0) { iwl_write32(trans(priv), HBUS_TARG_MEM_RADDR, base); status = iwl_read32(trans(priv), HBUS_TARG_MEM_RDAT); iwl_release_nic_access(trans(priv)); } spin_unlock_irqrestore(&trans(priv)->reg_lock, flags); #ifdef CONFIG_IWLWIFI_DEBUGFS if (ret == 0) { if (!priv->wowlan_sram) priv->wowlan_sram = kzalloc(priv->fw->ucode_wowlan.data.len, GFP_KERNEL); if (priv->wowlan_sram) _iwl_read_targ_mem_words( trans(priv), 0x800000, priv->wowlan_sram, priv->fw->ucode_wowlan.data.len / 4); } #endif } /* we'll clear ctx->vif during iwlagn_prepare_restart() */ vif = ctx->vif; priv->wowlan = false; device_set_wakeup_enable(trans(priv)->dev, 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); mutex_unlock(&priv->mutex); IWL_DEBUG_MAC80211(priv, "leave\n"); ieee80211_resume_disconnect(vif); return 1; } #endif static void iwlagn_mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb) { struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); IWL_DEBUG_TX(priv, "dev->xmit(%d bytes) at rate 0x%02x\n", skb->len, ieee80211_get_tx_rate(hw, IEEE80211_SKB_CB(skb))->bitrate); if (iwlagn_tx_skb(priv, skb)) dev_kfree_skb_any(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 (iwlagn_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 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 (!(hw_params(priv).sku & EEPROM_SKU_CAP_11N_ENABLE)) return -EACCES; IWL_DEBUG_MAC80211(priv, "enter\n"); mutex_lock(&priv->mutex); switch (action) { case IEEE80211_AMPDU_RX_START: if (iwlagn_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG) 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 (iwlagn_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG) break; IWL_DEBUG_HT(priv, "start Tx\n"); ret = iwlagn_tx_agg_start(priv, vif, sta, tid, ssn); break; case IEEE80211_AMPDU_TX_STOP: 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 && hw_params(priv).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); 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); 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->shrd)) 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_channel_switch *ch_switch) { struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); const struct iwl_channel_info *ch_info; struct ieee80211_conf *conf = &hw->conf; struct ieee80211_channel *channel = ch_switch->channel; 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->shrd)) goto out; if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status) || test_bit(STATUS_SCANNING, &priv->shrd->status) || test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->shrd->status)) goto out; if (!iwl_is_associated_ctx(ctx)) goto out; if (!cfg(priv)->lib->set_channel_switch) goto out; ch = channel->hw_value; if (le16_to_cpu(ctx->active.channel) == ch) goto out; ch_info = iwl_get_channel_info(priv, channel->band, ch); if (!is_channel_valid(ch_info)) { IWL_DEBUG_MAC80211(priv, "invalid channel\n"); goto out; } priv->current_ht_config.smps = conf->smps_mode; /* Configure HT40 channels */ ctx->ht.enabled = conf_is_ht(conf); if (ctx->ht.enabled) iwlagn_config_ht40(conf, ctx); else ctx->ht.is_40mhz = false; 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); iwl_set_rate(priv); /* * at this point, staging_rxon has the * configuration for channel switch */ set_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->shrd->status); priv->switch_channel = cpu_to_le16(ch); if (cfg(priv)->lib->set_channel_switch(priv, ch_switch)) { clear_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->shrd->status); priv->switch_channel = 0; ieee80211_chswitch_done(ctx->vif, false); } out: mutex_unlock(&priv->mutex); IWL_DEBUG_MAC80211(priv, "leave\n"); } 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 | FIF_PROMISC_IN_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_PROMISC_IN_BSS | FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL; } static void iwlagn_mac_flush(struct ieee80211_hw *hw, bool drop) { struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); mutex_lock(&priv->mutex); IWL_DEBUG_MAC80211(priv, "enter\n"); if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status)) { IWL_DEBUG_TX(priv, "Aborting flush due to device shutdown\n"); goto done; } if (iwl_is_rfkill(priv->shrd)) { IWL_DEBUG_TX(priv, "Aborting flush due to RF Kill\n"); goto done; } /* * mac80211 will not push any more frames for transmit * until the flush is completed */ if (drop) { IWL_DEBUG_MAC80211(priv, "send flush command\n"); if (iwlagn_txfifo_flush(priv, IWL_DROP_ALL)) { IWL_ERR(priv, "flush request fail\n"); goto done; } } IWL_DEBUG_MAC80211(priv, "wait transmit/flush all frames\n"); iwl_trans_wait_tx_queue_empty(trans(priv)); done: mutex_unlock(&priv->mutex); IWL_DEBUG_MAC80211(priv, "leave\n"); } static int iwlagn_mac_remain_on_channel(struct ieee80211_hw *hw, struct ieee80211_channel *channel, enum nl80211_channel_type channel_type, int duration) { struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_PAN]; int err = 0; if (!(priv->shrd->valid_contexts & BIT(IWL_RXON_CTX_PAN))) return -EOPNOTSUPP; if (!(ctx->interface_modes & BIT(NL80211_IFTYPE_P2P_CLIENT))) return -EOPNOTSUPP; IWL_DEBUG_MAC80211(priv, "enter\n"); mutex_lock(&priv->mutex); if (test_bit(STATUS_SCAN_HW, &priv->shrd->status)) { err = -EBUSY; goto out; } priv->hw_roc_channel = channel; priv->hw_roc_chantype = channel_type; /* convert from ms to TU */ priv->hw_roc_duration = DIV_ROUND_UP(1000 * duration, 1024); priv->hw_roc_start_notified = false; cancel_delayed_work(&priv->hw_roc_disable_work); if (!ctx->is_active) { static const struct iwl_qos_info default_qos_data = { .def_qos_parm = { .ac[0] = { .cw_min = cpu_to_le16(3), .cw_max = cpu_to_le16(7), .aifsn = 2, .edca_txop = cpu_to_le16(1504), }, .ac[1] = { .cw_min = cpu_to_le16(7), .cw_max = cpu_to_le16(15), .aifsn = 2, .edca_txop = cpu_to_le16(3008), }, .ac[2] = { .cw_min = cpu_to_le16(15), .cw_max = cpu_to_le16(1023), .aifsn = 3, }, .ac[3] = { .cw_min = cpu_to_le16(15), .cw_max = cpu_to_le16(1023), .aifsn = 7, }, }, }; ctx->is_active = true; ctx->qos_data = default_qos_data; ctx->staging.dev_type = RXON_DEV_TYPE_P2P; memcpy(ctx->staging.node_addr, priv->contexts[IWL_RXON_CTX_BSS].staging.node_addr, ETH_ALEN); memcpy(ctx->staging.bssid_addr, priv->contexts[IWL_RXON_CTX_BSS].staging.node_addr, ETH_ALEN); err = iwlagn_commit_rxon(priv, ctx); if (err) goto out; ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK | RXON_FILTER_PROMISC_MSK | RXON_FILTER_CTL2HOST_MSK; err = iwlagn_commit_rxon(priv, ctx); if (err) { iwlagn_disable_roc(priv); goto out; } priv->hw_roc_setup = true; } err = iwl_scan_initiate(priv, ctx->vif, IWL_SCAN_ROC, channel->band); if (err) iwlagn_disable_roc(priv); out: mutex_unlock(&priv->mutex); IWL_DEBUG_MAC80211(priv, "leave\n"); return err; } static int iwlagn_mac_cancel_remain_on_channel(struct ieee80211_hw *hw) { struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); if (!(priv->shrd->valid_contexts & BIT(IWL_RXON_CTX_PAN))) return -EOPNOTSUPP; IWL_DEBUG_MAC80211(priv, "enter\n"); mutex_lock(&priv->mutex); iwl_scan_cancel_timeout(priv, priv->hw_roc_duration); iwlagn_disable_roc(priv); mutex_unlock(&priv->mutex); IWL_DEBUG_MAC80211(priv, "leave\n"); return 0; } static void iwlagn_mac_rssi_callback(struct ieee80211_hw *hw, enum ieee80211_rssi_event rssi_event) { struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); IWL_DEBUG_MAC80211(priv, "enter\n"); mutex_lock(&priv->mutex); if (cfg(priv)->bt_params && cfg(priv)->bt_params->advanced_bt_coexist) { if (rssi_event == RSSI_EVENT_LOW) priv->bt_enable_pspoll = true; else if (rssi_event == RSSI_EVENT_HIGH) priv->bt_enable_pspoll = false; iwlagn_send_advance_bt_config(priv); } else { IWL_DEBUG_MAC80211(priv, "Advanced BT coex disabled," "ignoring RSSI callback\n"); } mutex_unlock(&priv->mutex); 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->shrd)) { 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; 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 (cfg(priv)->bt_params && cfg(priv)->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; } 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); IWL_DEBUG_MAC80211(priv, "enter: type %d, addr %pM\n", viftype, vif->addr); cancel_delayed_work_sync(&priv->hw_roc_disable_work); mutex_lock(&priv->mutex); iwlagn_disable_roc(priv); if (!iwl_is_ready_rf(priv->shrd)) { 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) { /* 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; err = iwl_setup_interface(priv, ctx); if (!err) 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 = iwl_rxon_ctx_from_vif(vif); struct iwl_rxon_context *bss_ctx = &priv->contexts[IWL_RXON_CTX_BSS]; struct iwl_rxon_context *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); if (!ctx->vif || !iwl_is_ready_rf(priv->shrd)) { /* * Huh? But wait ... this can maybe happen when * we're in the middle of a firmware restart! */ err = -EBUSY; goto out; } interface_modes = ctx->interface_modes | ctx->exclusive_interface_modes; if (!(interface_modes & BIT(newtype))) { err = -EBUSY; goto out; } /* * Refuse a change that should be done by moving from the PAN * context to the BSS context instead, if the BSS context is * available and can support the new interface type. */ if (ctx->ctxid == IWL_RXON_CTX_PAN && !bss_ctx->vif && (bss_ctx->interface_modes & BIT(newtype) || bss_ctx->exclusive_interface_modes & BIT(newtype))) { BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2); err = -EBUSY; goto out; } if (ctx->exclusive_interface_modes & BIT(newtype)) { for_each_context(priv, tmp) { if (ctx == tmp) continue; if (!tmp->vif) 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 cfg80211_scan_request *req) { struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); 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"); } 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, #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, .remain_on_channel = iwlagn_mac_remain_on_channel, .cancel_remain_on_channel = iwlagn_mac_cancel_remain_on_channel, .rssi_callback = iwlagn_mac_rssi_callback, CFG80211_TESTMODE_CMD(iwlagn_mac_testmode_cmd) CFG80211_TESTMODE_DUMP(iwlagn_mac_testmode_dump) .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; }