| /****************************************************************************** |
| * |
| * Copyright(c) 2003 - 2011 Intel Corporation. All rights reserved. |
| * |
| * 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 "iwl-dev.h" |
| #include "iwl-agn.h" |
| #include "iwl-sta.h" |
| #include "iwl-core.h" |
| #include "iwl-agn-calib.h" |
| #include "iwl-helpers.h" |
| #include "iwl-trans.h" |
| |
| static int iwlagn_disable_bss(struct iwl_priv *priv, |
| struct iwl_rxon_context *ctx, |
| struct iwl_rxon_cmd *send) |
| { |
| __le32 old_filter = send->filter_flags; |
| int ret; |
| |
| send->filter_flags &= ~RXON_FILTER_ASSOC_MSK; |
| ret = trans_send_cmd_pdu(priv, ctx->rxon_cmd, |
| CMD_SYNC, sizeof(*send), send); |
| |
| send->filter_flags = old_filter; |
| |
| if (ret) |
| IWL_ERR(priv, "Error clearing ASSOC_MSK on BSS (%d)\n", ret); |
| |
| return ret; |
| } |
| |
| static int iwlagn_disable_pan(struct iwl_priv *priv, |
| struct iwl_rxon_context *ctx, |
| struct iwl_rxon_cmd *send) |
| { |
| struct iwl_notification_wait disable_wait; |
| __le32 old_filter = send->filter_flags; |
| u8 old_dev_type = send->dev_type; |
| int ret; |
| |
| iwlagn_init_notification_wait(priv, &disable_wait, |
| REPLY_WIPAN_DEACTIVATION_COMPLETE, |
| NULL, NULL); |
| |
| send->filter_flags &= ~RXON_FILTER_ASSOC_MSK; |
| send->dev_type = RXON_DEV_TYPE_P2P; |
| ret = trans_send_cmd_pdu(priv, ctx->rxon_cmd, |
| CMD_SYNC, sizeof(*send), send); |
| |
| send->filter_flags = old_filter; |
| send->dev_type = old_dev_type; |
| |
| if (ret) { |
| IWL_ERR(priv, "Error disabling PAN (%d)\n", ret); |
| iwlagn_remove_notification(priv, &disable_wait); |
| } else { |
| ret = iwlagn_wait_notification(priv, &disable_wait, HZ); |
| if (ret) |
| IWL_ERR(priv, "Timed out waiting for PAN disable\n"); |
| } |
| |
| return ret; |
| } |
| |
| static int iwlagn_disconn_pan(struct iwl_priv *priv, |
| struct iwl_rxon_context *ctx, |
| struct iwl_rxon_cmd *send) |
| { |
| __le32 old_filter = send->filter_flags; |
| int ret; |
| |
| send->filter_flags &= ~RXON_FILTER_ASSOC_MSK; |
| ret = trans_send_cmd_pdu(priv, ctx->rxon_cmd, CMD_SYNC, |
| sizeof(*send), send); |
| |
| send->filter_flags = old_filter; |
| |
| return ret; |
| } |
| |
| static void iwlagn_update_qos(struct iwl_priv *priv, |
| struct iwl_rxon_context *ctx) |
| { |
| int ret; |
| |
| if (!ctx->is_active) |
| return; |
| |
| ctx->qos_data.def_qos_parm.qos_flags = 0; |
| |
| if (ctx->qos_data.qos_active) |
| ctx->qos_data.def_qos_parm.qos_flags |= |
| QOS_PARAM_FLG_UPDATE_EDCA_MSK; |
| |
| if (ctx->ht.enabled) |
| ctx->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK; |
| |
| IWL_DEBUG_QOS(priv, "send QoS cmd with Qos active=%d FLAGS=0x%X\n", |
| ctx->qos_data.qos_active, |
| ctx->qos_data.def_qos_parm.qos_flags); |
| |
| ret = trans_send_cmd_pdu(priv, ctx->qos_cmd, CMD_SYNC, |
| sizeof(struct iwl_qosparam_cmd), |
| &ctx->qos_data.def_qos_parm); |
| if (ret) |
| IWL_ERR(priv, "Failed to update QoS\n"); |
| } |
| |
| static int iwlagn_update_beacon(struct iwl_priv *priv, |
| struct ieee80211_vif *vif) |
| { |
| lockdep_assert_held(&priv->mutex); |
| |
| dev_kfree_skb(priv->beacon_skb); |
| priv->beacon_skb = ieee80211_beacon_get(priv->hw, vif); |
| if (!priv->beacon_skb) |
| return -ENOMEM; |
| return iwlagn_send_beacon_cmd(priv); |
| } |
| |
| static int iwlagn_send_rxon_assoc(struct iwl_priv *priv, |
| struct iwl_rxon_context *ctx) |
| { |
| int ret = 0; |
| struct iwl_rxon_assoc_cmd rxon_assoc; |
| const struct iwl_rxon_cmd *rxon1 = &ctx->staging; |
| const struct iwl_rxon_cmd *rxon2 = &ctx->active; |
| |
| if ((rxon1->flags == rxon2->flags) && |
| (rxon1->filter_flags == rxon2->filter_flags) && |
| (rxon1->cck_basic_rates == rxon2->cck_basic_rates) && |
| (rxon1->ofdm_ht_single_stream_basic_rates == |
| rxon2->ofdm_ht_single_stream_basic_rates) && |
| (rxon1->ofdm_ht_dual_stream_basic_rates == |
| rxon2->ofdm_ht_dual_stream_basic_rates) && |
| (rxon1->ofdm_ht_triple_stream_basic_rates == |
| rxon2->ofdm_ht_triple_stream_basic_rates) && |
| (rxon1->acquisition_data == rxon2->acquisition_data) && |
| (rxon1->rx_chain == rxon2->rx_chain) && |
| (rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates)) { |
| IWL_DEBUG_INFO(priv, "Using current RXON_ASSOC. Not resending.\n"); |
| return 0; |
| } |
| |
| rxon_assoc.flags = ctx->staging.flags; |
| rxon_assoc.filter_flags = ctx->staging.filter_flags; |
| rxon_assoc.ofdm_basic_rates = ctx->staging.ofdm_basic_rates; |
| rxon_assoc.cck_basic_rates = ctx->staging.cck_basic_rates; |
| rxon_assoc.reserved1 = 0; |
| rxon_assoc.reserved2 = 0; |
| rxon_assoc.reserved3 = 0; |
| rxon_assoc.ofdm_ht_single_stream_basic_rates = |
| ctx->staging.ofdm_ht_single_stream_basic_rates; |
| rxon_assoc.ofdm_ht_dual_stream_basic_rates = |
| ctx->staging.ofdm_ht_dual_stream_basic_rates; |
| rxon_assoc.rx_chain_select_flags = ctx->staging.rx_chain; |
| rxon_assoc.ofdm_ht_triple_stream_basic_rates = |
| ctx->staging.ofdm_ht_triple_stream_basic_rates; |
| rxon_assoc.acquisition_data = ctx->staging.acquisition_data; |
| |
| ret = trans_send_cmd_pdu(priv, ctx->rxon_assoc_cmd, |
| CMD_ASYNC, sizeof(rxon_assoc), &rxon_assoc); |
| return ret; |
| } |
| |
| static int iwlagn_rxon_disconn(struct iwl_priv *priv, |
| struct iwl_rxon_context *ctx) |
| { |
| int ret; |
| struct iwl_rxon_cmd *active = (void *)&ctx->active; |
| |
| if (ctx->ctxid == IWL_RXON_CTX_BSS) { |
| ret = iwlagn_disable_bss(priv, ctx, &ctx->staging); |
| } else { |
| ret = iwlagn_disable_pan(priv, ctx, &ctx->staging); |
| if (ret) |
| return ret; |
| if (ctx->vif) { |
| ret = iwl_send_rxon_timing(priv, ctx); |
| if (ret) { |
| IWL_ERR(priv, "Failed to send timing (%d)!\n", ret); |
| return ret; |
| } |
| ret = iwlagn_disconn_pan(priv, ctx, &ctx->staging); |
| } |
| } |
| if (ret) |
| return ret; |
| |
| /* |
| * Un-assoc RXON clears the station table and WEP |
| * keys, so we have to restore those afterwards. |
| */ |
| iwl_clear_ucode_stations(priv, ctx); |
| /* update -- might need P2P now */ |
| iwl_update_bcast_station(priv, ctx); |
| iwl_restore_stations(priv, ctx); |
| ret = iwl_restore_default_wep_keys(priv, ctx); |
| if (ret) { |
| IWL_ERR(priv, "Failed to restore WEP keys (%d)\n", ret); |
| return ret; |
| } |
| |
| memcpy(active, &ctx->staging, sizeof(*active)); |
| return 0; |
| } |
| |
| static int iwlagn_rxon_connect(struct iwl_priv *priv, |
| struct iwl_rxon_context *ctx) |
| { |
| int ret; |
| struct iwl_rxon_cmd *active = (void *)&ctx->active; |
| |
| /* RXON timing must be before associated RXON */ |
| if (ctx->ctxid == IWL_RXON_CTX_BSS) { |
| ret = iwl_send_rxon_timing(priv, ctx); |
| if (ret) { |
| IWL_ERR(priv, "Failed to send timing (%d)!\n", ret); |
| return ret; |
| } |
| } |
| /* QoS info may be cleared by previous un-assoc RXON */ |
| iwlagn_update_qos(priv, ctx); |
| |
| /* |
| * We'll run into this code path when beaconing is |
| * enabled, but then we also need to send the beacon |
| * to the device. |
| */ |
| if (ctx->vif && (ctx->vif->type == NL80211_IFTYPE_AP)) { |
| ret = iwlagn_update_beacon(priv, ctx->vif); |
| if (ret) { |
| IWL_ERR(priv, |
| "Error sending required beacon (%d)!\n", |
| ret); |
| return ret; |
| } |
| } |
| |
| priv->start_calib = 0; |
| /* |
| * Apply the new configuration. |
| * |
| * Associated RXON doesn't clear the station table in uCode, |
| * so we don't need to restore stations etc. after this. |
| */ |
| ret = trans_send_cmd_pdu(priv, ctx->rxon_cmd, CMD_SYNC, |
| sizeof(struct iwl_rxon_cmd), &ctx->staging); |
| if (ret) { |
| IWL_ERR(priv, "Error setting new RXON (%d)\n", ret); |
| return ret; |
| } |
| memcpy(active, &ctx->staging, sizeof(*active)); |
| |
| iwl_reprogram_ap_sta(priv, ctx); |
| |
| /* IBSS beacon needs to be sent after setting assoc */ |
| if (ctx->vif && (ctx->vif->type == NL80211_IFTYPE_ADHOC)) |
| if (iwlagn_update_beacon(priv, ctx->vif)) |
| IWL_ERR(priv, "Error sending IBSS beacon\n"); |
| iwl_init_sensitivity(priv); |
| |
| /* |
| * If we issue a new RXON command which required a tune then |
| * we must send a new TXPOWER command or we won't be able to |
| * Tx any frames. |
| * |
| * It's expected we set power here if channel is changing. |
| */ |
| ret = iwl_set_tx_power(priv, priv->tx_power_next, true); |
| if (ret) { |
| IWL_ERR(priv, "Error sending TX power (%d)\n", ret); |
| return ret; |
| } |
| |
| if ((ctx->vif && ctx->vif->type == NL80211_IFTYPE_STATION) && |
| priv->cfg->ht_params->smps_mode) |
| ieee80211_request_smps(ctx->vif, |
| priv->cfg->ht_params->smps_mode); |
| |
| return 0; |
| } |
| |
| /** |
| * iwlagn_commit_rxon - commit staging_rxon to hardware |
| * |
| * The RXON command in staging_rxon is committed to the hardware and |
| * the active_rxon structure is updated with the new data. This |
| * function correctly transitions out of the RXON_ASSOC_MSK state if |
| * a HW tune is required based on the RXON structure changes. |
| * |
| * The connect/disconnect flow should be as the following: |
| * |
| * 1. make sure send RXON command with association bit unset if not connect |
| * this should include the channel and the band for the candidate |
| * to be connected to |
| * 2. Add Station before RXON association with the AP |
| * 3. RXON_timing has to send before RXON for connection |
| * 4. full RXON command - associated bit set |
| * 5. use RXON_ASSOC command to update any flags changes |
| */ |
| int iwlagn_commit_rxon(struct iwl_priv *priv, struct iwl_rxon_context *ctx) |
| { |
| /* cast away the const for active_rxon in this function */ |
| struct iwl_rxon_cmd *active = (void *)&ctx->active; |
| bool new_assoc = !!(ctx->staging.filter_flags & RXON_FILTER_ASSOC_MSK); |
| int ret; |
| |
| lockdep_assert_held(&priv->mutex); |
| |
| if (test_bit(STATUS_EXIT_PENDING, &priv->status)) |
| return -EINVAL; |
| |
| if (!iwl_is_alive(priv)) |
| return -EBUSY; |
| |
| /* This function hardcodes a bunch of dual-mode assumptions */ |
| BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2); |
| |
| if (!ctx->is_active) |
| return 0; |
| |
| /* always get timestamp with Rx frame */ |
| ctx->staging.flags |= RXON_FLG_TSF2HOST_MSK; |
| |
| if (ctx->ctxid == IWL_RXON_CTX_PAN && priv->_agn.hw_roc_channel) { |
| struct ieee80211_channel *chan = priv->_agn.hw_roc_channel; |
| |
| iwl_set_rxon_channel(priv, chan, ctx); |
| iwl_set_flags_for_band(priv, ctx, chan->band, NULL); |
| ctx->staging.filter_flags |= |
| RXON_FILTER_ASSOC_MSK | |
| RXON_FILTER_PROMISC_MSK | |
| RXON_FILTER_CTL2HOST_MSK; |
| ctx->staging.dev_type = RXON_DEV_TYPE_P2P; |
| new_assoc = true; |
| |
| if (memcmp(&ctx->staging, &ctx->active, |
| sizeof(ctx->staging)) == 0) |
| return 0; |
| } |
| |
| /* |
| * force CTS-to-self frames protection if RTS-CTS is not preferred |
| * one aggregation protection method |
| */ |
| if (!(priv->cfg->ht_params && |
| priv->cfg->ht_params->use_rts_for_aggregation)) |
| ctx->staging.flags |= RXON_FLG_SELF_CTS_EN; |
| |
| if ((ctx->vif && ctx->vif->bss_conf.use_short_slot) || |
| !(ctx->staging.flags & RXON_FLG_BAND_24G_MSK)) |
| ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK; |
| else |
| ctx->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK; |
| |
| iwl_print_rx_config_cmd(priv, ctx); |
| ret = iwl_check_rxon_cmd(priv, ctx); |
| if (ret) { |
| IWL_ERR(priv, "Invalid RXON configuration. Not committing.\n"); |
| return -EINVAL; |
| } |
| |
| /* |
| * receive commit_rxon request |
| * abort any previous channel switch if still in process |
| */ |
| if (test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status) && |
| (priv->switch_channel != ctx->staging.channel)) { |
| IWL_DEBUG_11H(priv, "abort channel switch on %d\n", |
| le16_to_cpu(priv->switch_channel)); |
| iwl_chswitch_done(priv, false); |
| } |
| |
| /* |
| * If we don't need to send a full RXON, we can use |
| * iwl_rxon_assoc_cmd which is used to reconfigure filter |
| * and other flags for the current radio configuration. |
| */ |
| if (!iwl_full_rxon_required(priv, ctx)) { |
| ret = iwlagn_send_rxon_assoc(priv, ctx); |
| if (ret) { |
| IWL_ERR(priv, "Error setting RXON_ASSOC (%d)\n", ret); |
| return ret; |
| } |
| |
| memcpy(active, &ctx->staging, sizeof(*active)); |
| /* |
| * We do not commit tx power settings while channel changing, |
| * do it now if after settings changed. |
| */ |
| iwl_set_tx_power(priv, priv->tx_power_next, false); |
| |
| /* make sure we are in the right PS state */ |
| iwl_power_update_mode(priv, true); |
| |
| return 0; |
| } |
| |
| iwl_set_rxon_hwcrypto(priv, ctx, !iwlagn_mod_params.sw_crypto); |
| |
| IWL_DEBUG_INFO(priv, |
| "Going to commit RXON\n" |
| " * with%s RXON_FILTER_ASSOC_MSK\n" |
| " * channel = %d\n" |
| " * bssid = %pM\n", |
| (new_assoc ? "" : "out"), |
| le16_to_cpu(ctx->staging.channel), |
| ctx->staging.bssid_addr); |
| |
| /* |
| * Always clear associated first, but with the correct config. |
| * This is required as for example station addition for the |
| * AP station must be done after the BSSID is set to correctly |
| * set up filters in the device. |
| */ |
| ret = iwlagn_rxon_disconn(priv, ctx); |
| if (ret) |
| return ret; |
| |
| ret = iwlagn_set_pan_params(priv); |
| if (ret) |
| return ret; |
| |
| if (new_assoc) |
| return iwlagn_rxon_connect(priv, ctx); |
| |
| return 0; |
| } |
| |
| int iwlagn_mac_config(struct ieee80211_hw *hw, u32 changed) |
| { |
| struct iwl_priv *priv = hw->priv; |
| struct iwl_rxon_context *ctx; |
| struct ieee80211_conf *conf = &hw->conf; |
| struct ieee80211_channel *channel = conf->channel; |
| const struct iwl_channel_info *ch_info; |
| int ret = 0; |
| |
| IWL_DEBUG_MAC80211(priv, "changed %#x", changed); |
| |
| mutex_lock(&priv->mutex); |
| |
| if (unlikely(test_bit(STATUS_SCANNING, &priv->status))) { |
| IWL_DEBUG_MAC80211(priv, "leave - scanning\n"); |
| goto out; |
| } |
| |
| if (!iwl_is_ready(priv)) { |
| IWL_DEBUG_MAC80211(priv, "leave - not ready\n"); |
| goto out; |
| } |
| |
| if (changed & (IEEE80211_CONF_CHANGE_SMPS | |
| IEEE80211_CONF_CHANGE_CHANNEL)) { |
| /* mac80211 uses static for non-HT which is what we want */ |
| priv->current_ht_config.smps = conf->smps_mode; |
| |
| /* |
| * Recalculate chain counts. |
| * |
| * If monitor mode is enabled then mac80211 will |
| * set up the SM PS mode to OFF if an HT channel is |
| * configured. |
| */ |
| for_each_context(priv, ctx) |
| iwlagn_set_rxon_chain(priv, ctx); |
| } |
| |
| if (changed & IEEE80211_CONF_CHANGE_CHANNEL) { |
| unsigned long flags; |
| |
| ch_info = iwl_get_channel_info(priv, channel->band, |
| channel->hw_value); |
| if (!is_channel_valid(ch_info)) { |
| IWL_DEBUG_MAC80211(priv, "leave - invalid channel\n"); |
| ret = -EINVAL; |
| goto out; |
| } |
| |
| spin_lock_irqsave(&priv->lock, flags); |
| |
| for_each_context(priv, ctx) { |
| /* Configure HT40 channels */ |
| if (ctx->ht.enabled != conf_is_ht(conf)) |
| ctx->ht.enabled = conf_is_ht(conf); |
| |
| if (ctx->ht.enabled) { |
| if (conf_is_ht40_minus(conf)) { |
| ctx->ht.extension_chan_offset = |
| IEEE80211_HT_PARAM_CHA_SEC_BELOW; |
| ctx->ht.is_40mhz = true; |
| } else if (conf_is_ht40_plus(conf)) { |
| ctx->ht.extension_chan_offset = |
| IEEE80211_HT_PARAM_CHA_SEC_ABOVE; |
| ctx->ht.is_40mhz = true; |
| } else { |
| ctx->ht.extension_chan_offset = |
| IEEE80211_HT_PARAM_CHA_SEC_NONE; |
| ctx->ht.is_40mhz = false; |
| } |
| } else |
| ctx->ht.is_40mhz = false; |
| |
| /* |
| * Default to no protection. Protection mode will |
| * later be set from BSS config in iwl_ht_conf |
| */ |
| ctx->ht.protection = IEEE80211_HT_OP_MODE_PROTECTION_NONE; |
| |
| /* if we are switching from ht to 2.4 clear flags |
| * from any ht related info since 2.4 does not |
| * support ht */ |
| if (le16_to_cpu(ctx->staging.channel) != |
| channel->hw_value) |
| ctx->staging.flags = 0; |
| |
| iwl_set_rxon_channel(priv, channel, ctx); |
| iwl_set_rxon_ht(priv, &priv->current_ht_config); |
| |
| iwl_set_flags_for_band(priv, ctx, channel->band, |
| ctx->vif); |
| } |
| |
| spin_unlock_irqrestore(&priv->lock, flags); |
| |
| iwl_update_bcast_stations(priv); |
| |
| /* |
| * The list of supported rates and rate mask can be different |
| * for each band; since the band may have changed, reset |
| * the rate mask to what mac80211 lists. |
| */ |
| iwl_set_rate(priv); |
| } |
| |
| if (changed & (IEEE80211_CONF_CHANGE_PS | |
| IEEE80211_CONF_CHANGE_IDLE)) { |
| ret = iwl_power_update_mode(priv, false); |
| if (ret) |
| IWL_DEBUG_MAC80211(priv, "Error setting sleep level\n"); |
| } |
| |
| if (changed & IEEE80211_CONF_CHANGE_POWER) { |
| IWL_DEBUG_MAC80211(priv, "TX Power old=%d new=%d\n", |
| priv->tx_power_user_lmt, conf->power_level); |
| |
| iwl_set_tx_power(priv, conf->power_level, false); |
| } |
| |
| for_each_context(priv, ctx) { |
| if (!memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging))) |
| continue; |
| iwlagn_commit_rxon(priv, ctx); |
| } |
| out: |
| mutex_unlock(&priv->mutex); |
| return ret; |
| } |
| |
| static void iwlagn_check_needed_chains(struct iwl_priv *priv, |
| struct iwl_rxon_context *ctx, |
| struct ieee80211_bss_conf *bss_conf) |
| { |
| struct ieee80211_vif *vif = ctx->vif; |
| struct iwl_rxon_context *tmp; |
| struct ieee80211_sta *sta; |
| struct iwl_ht_config *ht_conf = &priv->current_ht_config; |
| struct ieee80211_sta_ht_cap *ht_cap; |
| bool need_multiple; |
| |
| lockdep_assert_held(&priv->mutex); |
| |
| switch (vif->type) { |
| case NL80211_IFTYPE_STATION: |
| rcu_read_lock(); |
| sta = ieee80211_find_sta(vif, bss_conf->bssid); |
| if (!sta) { |
| /* |
| * If at all, this can only happen through a race |
| * when the AP disconnects us while we're still |
| * setting up the connection, in that case mac80211 |
| * will soon tell us about that. |
| */ |
| need_multiple = false; |
| rcu_read_unlock(); |
| break; |
| } |
| |
| ht_cap = &sta->ht_cap; |
| |
| need_multiple = true; |
| |
| /* |
| * If the peer advertises no support for receiving 2 and 3 |
| * stream MCS rates, it can't be transmitting them either. |
| */ |
| if (ht_cap->mcs.rx_mask[1] == 0 && |
| ht_cap->mcs.rx_mask[2] == 0) { |
| need_multiple = false; |
| } else if (!(ht_cap->mcs.tx_params & |
| IEEE80211_HT_MCS_TX_DEFINED)) { |
| /* If it can't TX MCS at all ... */ |
| need_multiple = false; |
| } else if (ht_cap->mcs.tx_params & |
| IEEE80211_HT_MCS_TX_RX_DIFF) { |
| int maxstreams; |
| |
| /* |
| * But if it can receive them, it might still not |
| * be able to transmit them, which is what we need |
| * to check here -- so check the number of streams |
| * it advertises for TX (if different from RX). |
| */ |
| |
| maxstreams = (ht_cap->mcs.tx_params & |
| IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK); |
| maxstreams >>= |
| IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT; |
| maxstreams += 1; |
| |
| if (maxstreams <= 1) |
| need_multiple = false; |
| } |
| |
| rcu_read_unlock(); |
| break; |
| case NL80211_IFTYPE_ADHOC: |
| /* currently */ |
| need_multiple = false; |
| break; |
| default: |
| /* only AP really */ |
| need_multiple = true; |
| break; |
| } |
| |
| ctx->ht_need_multiple_chains = need_multiple; |
| |
| if (!need_multiple) { |
| /* check all contexts */ |
| for_each_context(priv, tmp) { |
| if (!tmp->vif) |
| continue; |
| if (tmp->ht_need_multiple_chains) { |
| need_multiple = true; |
| break; |
| } |
| } |
| } |
| |
| ht_conf->single_chain_sufficient = !need_multiple; |
| } |
| |
| void iwlagn_bss_info_changed(struct ieee80211_hw *hw, |
| struct ieee80211_vif *vif, |
| struct ieee80211_bss_conf *bss_conf, |
| u32 changes) |
| { |
| struct iwl_priv *priv = hw->priv; |
| struct iwl_rxon_context *ctx = iwl_rxon_ctx_from_vif(vif); |
| int ret; |
| bool force = false; |
| |
| mutex_lock(&priv->mutex); |
| |
| if (unlikely(!iwl_is_ready(priv))) { |
| IWL_DEBUG_MAC80211(priv, "leave - not ready\n"); |
| mutex_unlock(&priv->mutex); |
| return; |
| } |
| |
| if (unlikely(!ctx->vif)) { |
| IWL_DEBUG_MAC80211(priv, "leave - vif is NULL\n"); |
| mutex_unlock(&priv->mutex); |
| return; |
| } |
| |
| if (changes & BSS_CHANGED_BEACON_INT) |
| force = true; |
| |
| if (changes & BSS_CHANGED_QOS) { |
| ctx->qos_data.qos_active = bss_conf->qos; |
| iwlagn_update_qos(priv, ctx); |
| } |
| |
| ctx->staging.assoc_id = cpu_to_le16(vif->bss_conf.aid); |
| if (vif->bss_conf.use_short_preamble) |
| ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK; |
| else |
| ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK; |
| |
| if (changes & BSS_CHANGED_ASSOC) { |
| if (bss_conf->assoc) { |
| priv->timestamp = bss_conf->timestamp; |
| ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK; |
| } else { |
| /* |
| * If we disassociate while there are pending |
| * frames, just wake up the queues and let the |
| * frames "escape" ... This shouldn't really |
| * be happening to start with, but we should |
| * not get stuck in this case either since it |
| * can happen if userspace gets confused. |
| */ |
| if (ctx->last_tx_rejected) { |
| ctx->last_tx_rejected = false; |
| iwl_wake_any_queue(priv, ctx); |
| } |
| ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK; |
| } |
| } |
| |
| if (ctx->ht.enabled) { |
| ctx->ht.protection = bss_conf->ht_operation_mode & |
| IEEE80211_HT_OP_MODE_PROTECTION; |
| ctx->ht.non_gf_sta_present = !!(bss_conf->ht_operation_mode & |
| IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT); |
| iwlagn_check_needed_chains(priv, ctx, bss_conf); |
| iwl_set_rxon_ht(priv, &priv->current_ht_config); |
| } |
| |
| iwlagn_set_rxon_chain(priv, ctx); |
| |
| if (bss_conf->use_cts_prot && (priv->band != IEEE80211_BAND_5GHZ)) |
| ctx->staging.flags |= RXON_FLG_TGG_PROTECT_MSK; |
| else |
| ctx->staging.flags &= ~RXON_FLG_TGG_PROTECT_MSK; |
| |
| if (bss_conf->use_cts_prot) |
| ctx->staging.flags |= RXON_FLG_SELF_CTS_EN; |
| else |
| ctx->staging.flags &= ~RXON_FLG_SELF_CTS_EN; |
| |
| memcpy(ctx->staging.bssid_addr, bss_conf->bssid, ETH_ALEN); |
| |
| if (vif->type == NL80211_IFTYPE_AP || |
| vif->type == NL80211_IFTYPE_ADHOC) { |
| if (vif->bss_conf.enable_beacon) { |
| ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK; |
| priv->beacon_ctx = ctx; |
| } else { |
| ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK; |
| priv->beacon_ctx = NULL; |
| } |
| } |
| |
| if (force || memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging))) |
| iwlagn_commit_rxon(priv, ctx); |
| |
| if (changes & BSS_CHANGED_ASSOC && bss_conf->assoc) { |
| /* |
| * The chain noise calibration will enable PM upon |
| * completion. If calibration has already been run |
| * then we need to enable power management here. |
| */ |
| if (priv->chain_noise_data.state == IWL_CHAIN_NOISE_DONE) |
| iwl_power_update_mode(priv, false); |
| |
| /* Enable RX differential gain and sensitivity calibrations */ |
| iwl_chain_noise_reset(priv); |
| priv->start_calib = 1; |
| } |
| |
| if (changes & BSS_CHANGED_IBSS) { |
| ret = iwlagn_manage_ibss_station(priv, vif, |
| bss_conf->ibss_joined); |
| if (ret) |
| IWL_ERR(priv, "failed to %s IBSS station %pM\n", |
| bss_conf->ibss_joined ? "add" : "remove", |
| bss_conf->bssid); |
| } |
| |
| if (changes & BSS_CHANGED_BEACON && vif->type == NL80211_IFTYPE_ADHOC && |
| priv->beacon_ctx) { |
| if (iwlagn_update_beacon(priv, vif)) |
| IWL_ERR(priv, "Error sending IBSS beacon\n"); |
| } |
| |
| mutex_unlock(&priv->mutex); |
| } |
| |
| void iwlagn_post_scan(struct iwl_priv *priv) |
| { |
| struct iwl_rxon_context *ctx; |
| |
| /* |
| * We do not commit power settings while scan is pending, |
| * do it now if the settings changed. |
| */ |
| iwl_power_set_mode(priv, &priv->power_data.sleep_cmd_next, false); |
| iwl_set_tx_power(priv, priv->tx_power_next, false); |
| |
| /* |
| * Since setting the RXON may have been deferred while |
| * performing the scan, fire one off if needed |
| */ |
| for_each_context(priv, ctx) |
| if (memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging))) |
| iwlagn_commit_rxon(priv, ctx); |
| |
| iwlagn_set_pan_params(priv); |
| } |