X-Git-Url: https://git.karo-electronics.de/?a=blobdiff_plain;f=drivers%2Fnet%2Fwireless%2Fiwlwifi%2Fiwl-agn-rxon.c;fp=drivers%2Fnet%2Fwireless%2Fiwlwifi%2Fiwl-agn-rxon.c;h=6d140bd5329187ed7a2d8a9b713933c00e835e80;hb=f2ec334db8d14ae3ec2e4bf8d974f75b8f772e26;hp=0000000000000000000000000000000000000000;hpb=81e20d4d8d0317ecf1c7d193a52ab26cf74e1737;p=mv-sheeva.git 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 00000000000..6d140bd5329 --- /dev/null +++ b/drivers/net/wireless/iwlwifi/iwl-agn-rxon.c @@ -0,0 +1,642 @@ +/****************************************************************************** + * + * Copyright(c) 2003 - 2010 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 + * 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" + +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_send_cmd_pdu(priv, ctx->rxon_cmd, 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) +{ + __le32 old_filter = send->filter_flags; + u8 old_dev_type = send->dev_type; + int ret; + + send->filter_flags &= ~RXON_FILTER_ASSOC_MSK; + send->dev_type = RXON_DEV_TYPE_P2P; + ret = iwl_send_cmd_pdu(priv, ctx->rxon_cmd, 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); + + /* FIXME: WAIT FOR PAN DISABLE */ + msleep(300); + + 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 = iwl_send_cmd_pdu(priv, ctx->qos_cmd, + 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); +} + +/** + * 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. + */ +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); + bool old_assoc = !!(ctx->active.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->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; + + 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 (priv->switch_rxon.switch_in_progress && + (priv->switch_rxon.channel != ctx->staging.channel)) { + IWL_DEBUG_11H(priv, "abort channel switch on %d\n", + le16_to_cpu(priv->switch_rxon.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 = iwl_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)); + iwl_print_rx_config_cmd(priv, ctx); + return 0; + } + + if (priv->cfg->ops->hcmd->set_pan_params) { + ret = priv->cfg->ops->hcmd->set_pan_params(priv); + if (ret) + return ret; + } + + iwl_set_rxon_hwcrypto(priv, ctx, !priv->cfg->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. + */ + if ((old_assoc && new_assoc) || !new_assoc) { + 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; + + memcpy(active, &ctx->staging, sizeof(*active)); + + /* + * Un-assoc RXON clears the station table and WEP + * keys, so we have to restore those afterwards. + */ + iwl_clear_ucode_stations(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; + } + } + + /* RXON timing must be before associated RXON */ + ret = iwl_send_rxon_timing(priv, ctx); + if (ret) { + IWL_ERR(priv, "Failed to send timing (%d)!\n", ret); + return ret; + } + + if (new_assoc) { + /* 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_send_cmd_pdu(priv, ctx->rxon_cmd, + 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_print_rx_config_cmd(priv, ctx); + + 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. + * + * FIXME: which RXON requires a tune? Can we optimise this out in + * some cases? + */ + ret = iwl_set_tx_power(priv, priv->tx_power_user_lmt, true); + if (ret) { + IWL_ERR(priv, "Error sending TX power (%d)\n", ret); + return ret; + } + + 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; + bool ht_changed[NUM_IWL_RXON_CTX] = {}; + + 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. + */ + if (priv->cfg->ops->hcmd->set_rxon_chain) + for_each_context(priv, ctx) + priv->cfg->ops->hcmd->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); + ht_changed[ctx->ctxid] = true; + } + + 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); + if (ht_changed[ctx->ctxid]) + iwlagn_update_qos(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; + 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) { + struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap; + int maxstreams; + + maxstreams = (ht_cap->mcs.tx_params & + IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK) + >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT; + maxstreams += 1; + + need_multiple = true; + + if ((ht_cap->mcs.rx_mask[1] == 0) && + (ht_cap->mcs.rx_mask[2] == 0)) + need_multiple = false; + if (maxstreams <= 1) + need_multiple = false; + } else { + /* + * 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; + 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) { + iwl_led_associate(priv); + priv->timestamp = bss_conf->timestamp; + ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK; + } else { + ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK; + iwl_led_disassociate(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); + } + + if (priv->cfg->ops->hcmd->set_rxon_chain) + priv->cfg->ops->hcmd->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; + + /* + * 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); + + if (priv->cfg->ops->hcmd->set_pan_params) + priv->cfg->ops->hcmd->set_pan_params(priv); +}