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linux/drivers/net/wireless/iwlwifi/iwl-agn-rxon.c

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/******************************************************************************
*
* 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->trans, 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->trans, 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->trans, 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->trans, 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->trans, 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->trans, 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;
}
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->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_channel) {
/* both contexts must be used for this to happen */
slot1 = priv->hw_roc_duration;
slot0 = IWL_MIN_SLOT_TIME;
} else if (ctx_bss->vif && ctx_pan->vif) {
int bcnint = ctx_pan->vif->bss_conf.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->vif->bss_conf.beacon_int) {
IWL_ERR(priv,
"beacon intervals don't match (%d, %d)\n",
ctx_bss->vif->bss_conf.beacon_int,
ctx_pan->vif->bss_conf.beacon_int);
} else
bcnint = max_t(int, bcnint,
ctx_bss->vif->bss_conf.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 = 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->vif->bss_conf.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 = trans_send_cmd_pdu(&priv->trans, 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 (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->hw_roc_channel) {
struct ieee80211_channel *chan = priv->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;
}
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 = trans_send_cmd_pdu(&priv->trans,
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 = 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->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 (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);
}
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