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wifi: mt76: mt7921: introduce CSA support

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Add CSA (Channel Switch Announcement) related implementation
in collaboration with mac80211 to deal with dynamic channel
switching.

Signed-off-by: Leon Yen <leon.yen@mediatek.com>
Signed-off-by: Ming Yen Hsieh <mingyen.hsieh@mediatek.com>
Link: https://patch.msgid.link/20241107061440.6545-1-mingyen.hsieh@mediatek.com
Signed-off-by: Felix Fietkau <nbd@nbd.name>
This commit is contained in:
Leon Yen 2024-11-07 14:14:40 +08:00 committed by Felix Fietkau
parent efeaabc568
commit 8aa2f59260
4 changed files with 119 additions and 0 deletions
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98
drivers/net/wireless/mediatek/mt76/mt7921/main.c
View File

@ -339,6 +339,9 @@ mt7921_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER;
if (phy->chip_cap & MT792x_CHIP_CAP_RSSI_NOTIFY_EVT_EN)
vif->driver_flags |= IEEE80211_VIF_SUPPORTS_CQM_RSSI;
INIT_WORK(&mvif->csa_work, mt7921_csa_work);
timer_setup(&mvif->csa_timer, mt792x_csa_timer, 0);
out:
mt792x_mutex_release(dev);
@ -1342,6 +1345,9 @@ static int
mt7921_add_chanctx(struct ieee80211_hw *hw,
struct ieee80211_chanctx_conf *ctx)
{
struct mt792x_dev *dev = mt792x_hw_dev(hw);
dev->new_ctx = ctx;
return 0;
}
@ -1349,6 +1355,10 @@ static void
mt7921_remove_chanctx(struct ieee80211_hw *hw,
struct ieee80211_chanctx_conf *ctx)
{
struct mt792x_dev *dev = mt792x_hw_dev(hw);
if (dev->new_ctx == ctx)
dev->new_ctx = NULL;
}
static void
@ -1399,6 +1409,89 @@ static void mt7921_mgd_complete_tx(struct ieee80211_hw *hw,
mt7921_abort_roc(mvif->phy, mvif);
}
static int mt7921_switch_vif_chanctx(struct ieee80211_hw *hw,
struct ieee80211_vif_chanctx_switch *vifs,
int n_vifs,
enum ieee80211_chanctx_switch_mode mode)
{
return mt792x_assign_vif_chanctx(hw, vifs->vif, vifs->link_conf,
vifs->new_ctx);
}
void mt7921_csa_work(struct work_struct *work)
{
struct mt792x_vif *mvif;
struct mt792x_dev *dev;
struct ieee80211_vif *vif;
int ret;
mvif = (struct mt792x_vif *)container_of(work, struct mt792x_vif,
csa_work);
dev = mvif->phy->dev;
vif = container_of((void *)mvif, struct ieee80211_vif, drv_priv);
mt792x_mutex_acquire(dev);
ret = mt76_connac_mcu_uni_set_chctx(mvif->phy->mt76, &mvif->bss_conf.mt76,
dev->new_ctx);
mt792x_mutex_release(dev);
ieee80211_chswitch_done(vif, !ret, 0);
}
static int mt7921_pre_channel_switch(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
struct ieee80211_channel_switch *chsw)
{
if (vif->type != NL80211_IFTYPE_STATION || !vif->cfg.assoc)
return -EOPNOTSUPP;
/* Avoid beacon loss due to the CAC(Channel Availability Check) time
* of the AP.
*/
if (!cfg80211_chandef_usable(hw->wiphy, &chsw->chandef,
IEEE80211_CHAN_RADAR))
return -EOPNOTSUPP;
return 0;
}
static void mt7921_channel_switch(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
struct ieee80211_channel_switch *chsw)
{
struct mt792x_vif *mvif = (struct mt792x_vif *)vif->drv_priv;
u16 beacon_interval = vif->bss_conf.beacon_int;
mvif->csa_timer.expires = TU_TO_EXP_TIME(beacon_interval * chsw->count);
add_timer(&mvif->csa_timer);
}
static void mt7921_abort_channel_switch(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
struct ieee80211_bss_conf *link_conf)
{
struct mt792x_vif *mvif = (struct mt792x_vif *)vif->drv_priv;
del_timer_sync(&mvif->csa_timer);
cancel_work_sync(&mvif->csa_work);
}
static void mt7921_channel_switch_rx_beacon(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
struct ieee80211_channel_switch *chsw)
{
struct mt792x_dev *dev = mt792x_hw_dev(hw);
struct mt792x_vif *mvif = (struct mt792x_vif *)vif->drv_priv;
u16 beacon_interval = vif->bss_conf.beacon_int;
if (cfg80211_chandef_identical(&chsw->chandef,
&dev->new_ctx->def) &&
chsw->count) {
mod_timer(&mvif->csa_timer,
TU_TO_EXP_TIME(beacon_interval * chsw->count));
}
}
const struct ieee80211_ops mt7921_ops = {
.tx = mt792x_tx,
.start = mt7921_start,
@ -1458,6 +1551,11 @@ const struct ieee80211_ops mt7921_ops = {
.unassign_vif_chanctx = mt792x_unassign_vif_chanctx,
.mgd_prepare_tx = mt7921_mgd_prepare_tx,
.mgd_complete_tx = mt7921_mgd_complete_tx,
.switch_vif_chanctx = mt7921_switch_vif_chanctx,
.pre_channel_switch = mt7921_pre_channel_switch,
.channel_switch = mt7921_channel_switch,
.abort_channel_switch = mt7921_abort_channel_switch,
.channel_switch_rx_beacon = mt7921_channel_switch_rx_beacon,
};
EXPORT_SYMBOL_GPL(mt7921_ops);

1
drivers/net/wireless/mediatek/mt76/mt7921/mt7921.h
View File

@ -273,6 +273,7 @@ int mt7921_mcu_uni_rx_ba(struct mt792x_dev *dev,
bool enable);
void mt7921_scan_work(struct work_struct *work);
void mt7921_roc_work(struct work_struct *work);
void mt7921_csa_work(struct work_struct *work);
int mt7921_mcu_uni_bss_ps(struct mt792x_dev *dev, struct ieee80211_vif *vif);
void mt7921_coredump_work(struct work_struct *work);
int mt7921_get_txpwr_info(struct mt792x_dev *dev, struct mt7921_txpwr *txpwr);

6
drivers/net/wireless/mediatek/mt76/mt792x.h
View File

@ -133,6 +133,9 @@ struct mt792x_vif {
struct mt792x_phy *phy;
u16 valid_links;
u8 deflink_id;
struct work_struct csa_work;
struct timer_list csa_timer;
};
struct mt792x_phy {
@ -237,6 +240,8 @@ struct mt792x_dev {
enum environment_cap country_ie_env;
u32 backup_l1;
u32 backup_l2;
struct ieee80211_chanctx_conf *new_ctx;
};
static inline struct mt792x_bss_conf *
@ -369,6 +374,7 @@ void mt792x_set_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
u64 timestamp);
void mt792x_tx_worker(struct mt76_worker *w);
void mt792x_roc_timer(struct timer_list *timer);
void mt792x_csa_timer(struct timer_list *timer);
void mt792x_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
u32 queues, bool drop);
int mt792x_assign_vif_chanctx(struct ieee80211_hw *hw,

14
drivers/net/wireless/mediatek/mt76/mt792x_core.c
View File

@ -289,6 +289,14 @@ void mt792x_roc_timer(struct timer_list *timer)
}
EXPORT_SYMBOL_GPL(mt792x_roc_timer);
void mt792x_csa_timer(struct timer_list *timer)
{
struct mt792x_vif *mvif = from_timer(mvif, timer, csa_timer);
ieee80211_queue_work(mvif->phy->mt76->hw, &mvif->csa_work);
}
EXPORT_SYMBOL_GPL(mt792x_csa_timer);
void mt792x_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
u32 queues, bool drop)
{
@ -330,6 +338,11 @@ void mt792x_unassign_vif_chanctx(struct ieee80211_hw *hw,
mctx->bss_conf = NULL;
mvif->bss_conf.mt76.ctx = NULL;
mutex_unlock(&dev->mt76.mutex);
if (vif->bss_conf.csa_active) {
del_timer_sync(&mvif->csa_timer);
cancel_work_sync(&mvif->csa_work);
}
}
EXPORT_SYMBOL_GPL(mt792x_unassign_vif_chanctx);
@ -652,6 +665,7 @@ int mt792x_init_wiphy(struct ieee80211_hw *hw)
ieee80211_hw_set(hw, SUPPORTS_DYNAMIC_PS);
ieee80211_hw_set(hw, SUPPORTS_VHT_EXT_NSS_BW);
ieee80211_hw_set(hw, CONNECTION_MONITOR);
ieee80211_hw_set(hw, CHANCTX_STA_CSA);
if (dev->pm.enable)
ieee80211_hw_set(hw, CONNECTION_MONITOR);