diff options
Diffstat (limited to 'drivers/net/wireless/iwlwifi/iwl-agn-rxon.c')
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-agn-rxon.c | 953 |
1 files changed, 953 insertions, 0 deletions
diff --git a/drivers/net/wireless/iwlwifi/iwl-agn-rxon.c b/drivers/net/wireless/iwlwifi/iwl-agn-rxon.c new file mode 100644 index 00000000..2e1a3179 --- /dev/null +++ b/drivers/net/wireless/iwlwifi/iwl-agn-rxon.c @@ -0,0 +1,953 @@ +/****************************************************************************** + * + * Copyright(c) 2003 - 2012 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-core.h" +#include "iwl-agn-calib.h" +#include "iwl-trans.h" +#include "iwl-shared.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 = iwl_dvm_send_cmd_pdu(priv, ctx->rxon_cmd, + CMD_SYNC, sizeof(*send), send); + + send->filter_flags = old_filter; + + if (ret) + IWL_DEBUG_QUIET_RFKILL(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; + + iwl_init_notification_wait(&priv->notif_wait, &disable_wait, + REPLY_WIPAN_DEACTIVATION_COMPLETE, + NULL, NULL); + + send->filter_flags &= ~RXON_FILTER_ASSOC_MSK; + send->dev_type = RXON_DEV_TYPE_P2P; + ret = iwl_dvm_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); + iwl_remove_notification(&priv->notif_wait, &disable_wait); + } else { + ret = iwl_wait_notification(&priv->notif_wait, + &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 = iwl_dvm_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_INFO(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 = iwl_dvm_send_cmd_pdu(priv, ctx->qos_cmd, CMD_SYNC, + sizeof(struct iwl_qosparam_cmd), + &ctx->qos_data.def_qos_parm); + if (ret) + IWL_DEBUG_QUIET_RFKILL(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 = iwl_dvm_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 = iwl_dvm_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)); + + /* 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 && + cfg(priv)->ht_params && cfg(priv)->ht_params->smps_mode) + ieee80211_request_smps(ctx->vif, + cfg(priv)->ht_params->smps_mode); + + return 0; +} + +int iwlagn_set_pan_params(struct iwl_priv *priv) +{ + struct iwl_wipan_params_cmd cmd; + struct iwl_rxon_context *ctx_bss, *ctx_pan; + int slot0 = 300, slot1 = 0; + int ret; + + if (priv->shrd->valid_contexts == BIT(IWL_RXON_CTX_BSS)) + return 0; + + BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2); + + lockdep_assert_held(&priv->mutex); + + ctx_bss = &priv->contexts[IWL_RXON_CTX_BSS]; + ctx_pan = &priv->contexts[IWL_RXON_CTX_PAN]; + + /* + * If the PAN context is inactive, then we don't need + * to update the PAN parameters, the last thing we'll + * have done before it goes inactive is making the PAN + * parameters be WLAN-only. + */ + if (!ctx_pan->is_active) + return 0; + + memset(&cmd, 0, sizeof(cmd)); + + /* only 2 slots are currently allowed */ + cmd.num_slots = 2; + + cmd.slots[0].type = 0; /* BSS */ + cmd.slots[1].type = 1; /* PAN */ + + if (priv->hw_roc_setup) { + /* both contexts must be used for this to happen */ + slot1 = IWL_MIN_SLOT_TIME; + slot0 = 3000; + } else if (ctx_bss->vif && ctx_pan->vif) { + int bcnint = ctx_pan->beacon_int; + int dtim = ctx_pan->vif->bss_conf.dtim_period ?: 1; + + /* should be set, but seems unused?? */ + cmd.flags |= cpu_to_le16(IWL_WIPAN_PARAMS_FLG_SLOTTED_MODE); + + if (ctx_pan->vif->type == NL80211_IFTYPE_AP && + bcnint && + bcnint != ctx_bss->beacon_int) { + IWL_ERR(priv, + "beacon intervals don't match (%d, %d)\n", + ctx_bss->beacon_int, ctx_pan->beacon_int); + } else + bcnint = max_t(int, bcnint, + ctx_bss->beacon_int); + if (!bcnint) + bcnint = DEFAULT_BEACON_INTERVAL; + slot0 = bcnint / 2; + slot1 = bcnint - slot0; + + if (test_bit(STATUS_SCAN_HW, &priv->status) || + (!ctx_bss->vif->bss_conf.idle && + !ctx_bss->vif->bss_conf.assoc)) { + slot0 = dtim * bcnint * 3 - IWL_MIN_SLOT_TIME; + slot1 = IWL_MIN_SLOT_TIME; + } else if (!ctx_pan->vif->bss_conf.idle && + !ctx_pan->vif->bss_conf.assoc) { + slot1 = dtim * bcnint * 3 - IWL_MIN_SLOT_TIME; + slot0 = IWL_MIN_SLOT_TIME; + } + } else if (ctx_pan->vif) { + slot0 = 0; + slot1 = max_t(int, 1, ctx_pan->vif->bss_conf.dtim_period) * + ctx_pan->beacon_int; + slot1 = max_t(int, DEFAULT_BEACON_INTERVAL, slot1); + + if (test_bit(STATUS_SCAN_HW, &priv->status)) { + slot0 = slot1 * 3 - IWL_MIN_SLOT_TIME; + slot1 = IWL_MIN_SLOT_TIME; + } + } + + cmd.slots[0].width = cpu_to_le16(slot0); + cmd.slots[1].width = cpu_to_le16(slot1); + + ret = iwl_dvm_send_cmd_pdu(priv, REPLY_WIPAN_PARAMS, CMD_SYNC, + sizeof(cmd), &cmd); + if (ret) + IWL_ERR(priv, "Error setting PAN parameters (%d)\n", ret); + + return ret; +} + +/** + * 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 (!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; + + /* + * force CTS-to-self frames protection if RTS-CTS is not preferred + * one aggregation protection method + */ + if (!hw_params(priv).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->ctxid); + 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; +} + +void iwlagn_config_ht40(struct ieee80211_conf *conf, + struct iwl_rxon_context *ctx) +{ + 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; + } +} + +int iwlagn_mac_config(struct ieee80211_hw *hw, u32 changed) +{ + struct iwl_priv *priv = IWL_MAC80211_GET_DVM(hw); + 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, "enter: 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) { + 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; + } + + 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 HT40 is used, it should not change + * after associated except channel switch */ + if (!ctx->ht.is_40mhz || + !iwl_is_associated_ctx(ctx)) + iwlagn_config_ht40(conf, ctx); + } 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); + } + + 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); + IWL_DEBUG_MAC80211(priv, "leave\n"); + + 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; +} + +static void iwlagn_chain_noise_reset(struct iwl_priv *priv) +{ + struct iwl_chain_noise_data *data = &priv->chain_noise_data; + int ret; + + if ((data->state == IWL_CHAIN_NOISE_ALIVE) && + iwl_is_any_associated(priv)) { + struct iwl_calib_chain_noise_reset_cmd cmd; + + /* clear data for chain noise calibration algorithm */ + data->chain_noise_a = 0; + data->chain_noise_b = 0; + data->chain_noise_c = 0; + data->chain_signal_a = 0; + data->chain_signal_b = 0; + data->chain_signal_c = 0; + data->beacon_count = 0; + + memset(&cmd, 0, sizeof(cmd)); + iwl_set_calib_hdr(&cmd.hdr, + priv->phy_calib_chain_noise_reset_cmd); + ret = iwl_dvm_send_cmd_pdu(priv, + REPLY_PHY_CALIBRATION_CMD, + CMD_SYNC, sizeof(cmd), &cmd); + if (ret) + IWL_ERR(priv, + "Could not send REPLY_PHY_CALIBRATION_CMD\n"); + data->state = IWL_CHAIN_NOISE_ACCUMULATE; + IWL_DEBUG_CALIB(priv, "Run chain_noise_calibrate\n"); + } +} + +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 = IWL_MAC80211_GET_DVM(hw); + 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->last_tsf; + 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. + */ + iwlagn_lift_passive_no_rx(priv); + + ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK; + + if (ctx->ctxid == IWL_RXON_CTX_BSS) + priv->have_rekey_data = false; + } + + iwlagn_bt_coex_rssi_monitor(priv); + } + + 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 the ucode decides to do beacon filtering before + * association, it will lose beacons that are needed + * before sending frames out on passive channels. This + * causes association failures on those channels. Enable + * receiving beacons in such cases. + */ + + if (vif->type == NL80211_IFTYPE_STATION) { + if (!bss_conf->assoc) + ctx->staging.filter_flags |= RXON_FILTER_BCON_AWARE_MSK; + else + ctx->staging.filter_flags &= + ~RXON_FILTER_BCON_AWARE_MSK; + } + + 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 */ + if (!priv->disable_chain_noise_cal) + iwlagn_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); +} |