static ssize_t iwl_dbgfs_reduced_txp_write(struct ieee80211_vif *vif,
char *buf, size_t count,
loff_t *ppos)
{
struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
struct iwl_mvm *mvm = mvmvif->mvm;
struct iwl_mvm_sta *mvmsta;
bool reduced_tx_power;
int ret;
if (mvmvif->ap_sta_id >= ARRAY_SIZE(mvm->fw_id_to_mac_id))
return -ENOTCONN;
if (strtobool(buf, &reduced_tx_power) != 0)
return -EINVAL;
mutex_lock(&mvm->mutex);
mvmsta = iwl_mvm_sta_from_staid_protected(mvm, mvmvif->ap_sta_id);
if (IS_ERR_OR_NULL(mvmsta)) {
mutex_unlock(&mvm->mutex);
return -ENOTCONN;
}
mvmsta->bt_reduced_txpower_dbg = false;
ret = iwl_mvm_bt_coex_reduced_txp(mvm, mvmvif->ap_sta_id,
reduced_tx_power);
if (!ret)
mvmsta->bt_reduced_txpower_dbg = true;
mutex_unlock(&mvm->mutex);
return ret ? : count;
}
static void iwl_mvm_bt_coex_notif_handle(struct iwl_mvm *mvm)
{
struct iwl_bt_iterator_data data = {
.mvm = mvm,
.notif = &mvm->last_bt_notif,
};
struct iwl_bt_coex_ci_cmd cmd = {};
u8 ci_bw_idx;
/* Ignore updates if we are in force mode */
if (unlikely(mvm->bt_force_ant_mode != BT_FORCE_ANT_DIS))
return;
rcu_read_lock();
ieee80211_iterate_active_interfaces_atomic(
mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
iwl_mvm_bt_notif_iterator, &data);
iwl_mvm_bt_coex_tcm_based_ci(mvm, &data);
if (data.primary) {
struct ieee80211_chanctx_conf *chan = data.primary;
if (WARN_ON(!chan->def.chan)) {
rcu_read_unlock();
return;
}
if (chan->def.width < NL80211_CHAN_WIDTH_40) {
ci_bw_idx = 0;
} else {
if (chan->def.center_freq1 >
chan->def.chan->center_freq)
ci_bw_idx = 2;
else
ci_bw_idx = 1;
}
cmd.bt_primary_ci =
iwl_ci_mask[chan->def.chan->hw_value][ci_bw_idx];
cmd.primary_ch_phy_id =
cpu_to_le32(*((u16 *)data.primary->drv_priv));
}
if (data.secondary) {
struct ieee80211_chanctx_conf *chan = data.secondary;
if (WARN_ON(!data.secondary->def.chan)) {
rcu_read_unlock();
return;
}
if (chan->def.width < NL80211_CHAN_WIDTH_40) {
ci_bw_idx = 0;
} else {
if (chan->def.center_freq1 >
chan->def.chan->center_freq)
ci_bw_idx = 2;
else
ci_bw_idx = 1;
}
cmd.bt_secondary_ci =
iwl_ci_mask[chan->def.chan->hw_value][ci_bw_idx];
cmd.secondary_ch_phy_id =
cpu_to_le32(*((u16 *)data.secondary->drv_priv));
}
rcu_read_unlock();
/* Don't spam the fw with the same command over and over */
if (memcmp(&cmd, &mvm->last_bt_ci_cmd, sizeof(cmd))) {
if (iwl_mvm_send_cmd_pdu(mvm, BT_COEX_CI, 0,
sizeof(cmd), &cmd))
IWL_ERR(mvm, "Failed to send BT_CI cmd\n");
memcpy(&mvm->last_bt_ci_cmd, &cmd, sizeof(cmd));
}
}
void iwl_mvm_rx_bt_coex_notif(struct iwl_mvm *mvm,
struct iwl_rx_cmd_buffer *rxb)
{
struct iwl_rx_packet *pkt = rxb_addr(rxb);
struct iwl_bt_coex_profile_notif *notif = (void *)pkt->data;
IWL_DEBUG_COEX(mvm, "BT Coex Notification received\n");
IWL_DEBUG_COEX(mvm, "\tBT ci compliance %d\n", notif->bt_ci_compliance);
IWL_DEBUG_COEX(mvm, "\tBT primary_ch_lut %d\n",
le32_to_cpu(notif->primary_ch_lut));
IWL_DEBUG_COEX(mvm, "\tBT secondary_ch_lut %d\n",
le32_to_cpu(notif->secondary_ch_lut));
IWL_DEBUG_COEX(mvm, "\tBT activity grading %d\n",
le32_to_cpu(notif->bt_activity_grading));
/* remember this notification for future use: rssi fluctuations */
memcpy(&mvm->last_bt_notif, notif, sizeof(mvm->last_bt_notif));
iwl_mvm_bt_coex_notif_handle(mvm);
}
void iwl_mvm_bt_rssi_event(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
enum ieee80211_rssi_event_data rssi_event)
{
struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
int ret;
lockdep_assert_held(&mvm->mutex);
/* Ignore updates if we are in force mode */
if (unlikely(mvm->bt_force_ant_mode != BT_FORCE_ANT_DIS))
return;
/*
* Rssi update while not associated - can happen since the statistics
* are handled asynchronously
*/
if (mvmvif->ap_sta_id == IWL_MVM_INVALID_STA)
return;
/* No BT - reports should be disabled */
if (le32_to_cpu(mvm->last_bt_notif.bt_activity_grading) == BT_OFF)
return;
IWL_DEBUG_COEX(mvm, "RSSI for %pM is now %s\n", vif->bss_conf.bssid,
rssi_event == RSSI_EVENT_HIGH ? "HIGH" : "LOW");
/*
* Check if rssi is good enough for reduced Tx power, but not in loose
* scheme.
*/
if (rssi_event == RSSI_EVENT_LOW || mvm->cfg->bt_shared_single_ant ||
iwl_get_coex_type(mvm, vif) == BT_COEX_LOOSE_LUT)
ret = iwl_mvm_bt_coex_reduced_txp(mvm, mvmvif->ap_sta_id,
false);
else
ret = iwl_mvm_bt_coex_reduced_txp(mvm, mvmvif->ap_sta_id, true);
if (ret)
IWL_ERR(mvm, "couldn't send BT_CONFIG HCMD upon RSSI event\n");
}
#define LINK_QUAL_AGG_TIME_LIMIT_DEF (4000)
#define LINK_QUAL_AGG_TIME_LIMIT_BT_ACT (1200)
u16 iwl_mvm_coex_agg_time_limit(struct iwl_mvm *mvm,
struct ieee80211_sta *sta)
{
struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif);
struct iwl_mvm_phy_ctxt *phy_ctxt = mvmvif->phy_ctxt;
enum iwl_bt_coex_lut_type lut_type;
if (mvm->last_bt_notif.ttc_status & BIT(phy_ctxt->id))
return LINK_QUAL_AGG_TIME_LIMIT_DEF;
if (le32_to_cpu(mvm->last_bt_notif.bt_activity_grading) <
BT_HIGH_TRAFFIC)
return LINK_QUAL_AGG_TIME_LIMIT_DEF;
lut_type = iwl_get_coex_type(mvm, mvmsta->vif);
if (lut_type == BT_COEX_LOOSE_LUT || lut_type == BT_COEX_INVALID_LUT)
return LINK_QUAL_AGG_TIME_LIMIT_DEF;
/* tight coex, high bt traffic, reduce AGG time limit */
return LINK_QUAL_AGG_TIME_LIMIT_BT_ACT;
}
bool iwl_mvm_bt_coex_is_mimo_allowed(struct iwl_mvm *mvm,
struct ieee80211_sta *sta)
{
struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(mvmsta->vif);
struct iwl_mvm_phy_ctxt *phy_ctxt = mvmvif->phy_ctxt;
enum iwl_bt_coex_lut_type lut_type;
if (mvm->last_bt_notif.ttc_status & BIT(phy_ctxt->id))
return true;
if (le32_to_cpu(mvm->last_bt_notif.bt_activity_grading) <
BT_HIGH_TRAFFIC)
return true;
/*
* In Tight / TxTxDis, BT can't Rx while we Tx, so use both antennas
* since BT is already killed.
* In Loose, BT can Rx while we Tx, so forbid MIMO to let BT Rx while
* we Tx.
* When we are in 5GHz, we'll get BT_COEX_INVALID_LUT allowing MIMO.
*/
lut_type = iwl_get_coex_type(mvm, mvmsta->vif);
return lut_type != BT_COEX_LOOSE_LUT;
}
bool iwl_mvm_bt_coex_is_ant_avail(struct iwl_mvm *mvm, u8 ant)
{
/* there is no other antenna, shared antenna is always available */
if (mvm->cfg->bt_shared_single_ant)
return true;
if (ant & mvm->cfg->non_shared_ant)
return true;
return le32_to_cpu(mvm->last_bt_notif.bt_activity_grading) <
BT_HIGH_TRAFFIC;
}
bool iwl_mvm_bt_coex_is_shared_ant_avail(struct iwl_mvm *mvm)
{
/* there is no other antenna, shared antenna is always available */
if (mvm->cfg->bt_shared_single_ant)
return true;
return le32_to_cpu(mvm->last_bt_notif.bt_activity_grading) < BT_HIGH_TRAFFIC;
}
bool iwl_mvm_bt_coex_is_tpc_allowed(struct iwl_mvm *mvm,
enum nl80211_band band)
{
u32 bt_activity = le32_to_cpu(mvm->last_bt_notif.bt_activity_grading);
if (band != NL80211_BAND_2GHZ)
return false;
return bt_activity >= BT_LOW_TRAFFIC;
}
/* must be called under rcu_read_lock */
static void iwl_mvm_bt_notif_iterator(void *_data, u8 *mac,
struct ieee80211_vif *vif)
{
struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
struct iwl_bt_iterator_data *data = _data;
struct iwl_mvm *mvm = data->mvm;
struct ieee80211_chanctx_conf *chanctx_conf;
/* default smps_mode is AUTOMATIC - only used for client modes */
enum ieee80211_smps_mode smps_mode = IEEE80211_SMPS_AUTOMATIC;
u32 bt_activity_grading;
int ave_rssi;
lockdep_assert_held(&mvm->mutex);
switch (vif->type) {
case NL80211_IFTYPE_STATION:
break;
case NL80211_IFTYPE_AP:
if (!mvmvif->ap_ibss_active)
return;
break;
default:
return;
}
chanctx_conf = rcu_dereference(vif->chanctx_conf);
/* If channel context is invalid or not on 2.4GHz .. */
if ((!chanctx_conf ||
chanctx_conf->def.chan->band != NL80211_BAND_2GHZ)) {
if (vif->type == NL80211_IFTYPE_STATION) {
/* ... relax constraints and disable rssi events */
iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_BT_COEX,
smps_mode);
iwl_mvm_bt_coex_reduced_txp(mvm, mvmvif->ap_sta_id,
false);
iwl_mvm_bt_coex_enable_rssi_event(mvm, vif, false, 0);
}
return;
}
bt_activity_grading = le32_to_cpu(data->notif->bt_activity_grading);
if (bt_activity_grading >= BT_HIGH_TRAFFIC)
smps_mode = IEEE80211_SMPS_STATIC;
else if (bt_activity_grading >= BT_LOW_TRAFFIC)
smps_mode = IEEE80211_SMPS_DYNAMIC;
/* relax SMPS constraints for next association */
if (!vif->bss_conf.assoc)
smps_mode = IEEE80211_SMPS_AUTOMATIC;
if (mvmvif->phy_ctxt &&
(mvm->last_bt_notif.rrc_status & BIT(mvmvif->phy_ctxt->id)))
smps_mode = IEEE80211_SMPS_AUTOMATIC;
IWL_DEBUG_COEX(data->mvm,
"mac %d: bt_activity_grading %d smps_req %d\n",
mvmvif->id, bt_activity_grading, smps_mode);
if (vif->type == NL80211_IFTYPE_STATION)
iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_BT_COEX,
smps_mode);
/* low latency is always primary */
if (iwl_mvm_vif_low_latency(mvmvif)) {
data->primary_ll = true;
data->secondary = data->primary;
data->primary = chanctx_conf;
}
if (vif->type == NL80211_IFTYPE_AP) {
if (!mvmvif->ap_ibss_active)
return;
if (chanctx_conf == data->primary)
return;
if (!data->primary_ll) {
/*
* downgrade the current primary no matter what its
* type is.
*/
data->secondary = data->primary;
data->primary = chanctx_conf;
} else {
/* there is low latency vif - we will be secondary */
data->secondary = chanctx_conf;
}
if (data->primary == chanctx_conf)
data->primary_load = mvm->tcm.result.load[mvmvif->id];
else if (data->secondary == chanctx_conf)
data->secondary_load = mvm->tcm.result.load[mvmvif->id];
return;
}
/*
* STA / P2P Client, try to be primary if first vif. If we are in low
* latency mode, we are already in primary and just don't do much
*/
if (!data->primary || data->primary == chanctx_conf)
data->primary = chanctx_conf;
else if (!data->secondary)
/* if secondary is not NULL, it might be a GO */
data->secondary = chanctx_conf;
if (data->primary == chanctx_conf)
data->primary_load = mvm->tcm.result.load[mvmvif->id];
else if (data->secondary == chanctx_conf)
data->secondary_load = mvm->tcm.result.load[mvmvif->id];
/*
* don't reduce the Tx power if one of these is true:
* we are in LOOSE
* single share antenna product
* BT is inactive
* we are not associated
*/
if (iwl_get_coex_type(mvm, vif) == BT_COEX_LOOSE_LUT ||
mvm->cfg->bt_shared_single_ant || !vif->bss_conf.assoc ||
le32_to_cpu(mvm->last_bt_notif.bt_activity_grading) == BT_OFF) {
iwl_mvm_bt_coex_reduced_txp(mvm, mvmvif->ap_sta_id, false);
iwl_mvm_bt_coex_enable_rssi_event(mvm, vif, false, 0);
return;
}
/* try to get the avg rssi from fw */
ave_rssi = mvmvif->bf_data.ave_beacon_signal;
/* if the RSSI isn't valid, fake it is very low */
if (!ave_rssi)
ave_rssi = -100;
if (ave_rssi > -IWL_MVM_BT_COEX_EN_RED_TXP_THRESH) {
if (iwl_mvm_bt_coex_reduced_txp(mvm, mvmvif->ap_sta_id, true))
IWL_ERR(mvm, "Couldn't send BT_CONFIG cmd\n");
} else if (ave_rssi < -IWL_MVM_BT_COEX_DIS_RED_TXP_THRESH) {
if (iwl_mvm_bt_coex_reduced_txp(mvm, mvmvif->ap_sta_id, false))
IWL_ERR(mvm, "Couldn't send BT_CONFIG cmd\n");
}
/* Begin to monitor the RSSI: it may influence the reduced Tx power */
iwl_mvm_bt_coex_enable_rssi_event(mvm, vif, true, ave_rssi);
}
