[PATCH 6.8 242/715] wifi: mt76: mt7925: add support to set ifs time by mcu command

Sasha Levin
2024-03-24T22:38:56Z

From: Ming Yen Hsieh <mingyen.hsieh@mediatek.com>

[ Upstream commit 8536ef0aeae1177c4a59b043d4b1c41ddaa9df2a ]

There's a race between driver and fw on some tx/rx control registers
when setting ifs, which will cause accidental hw queue pause problems.
Avoid this by setting ifs time with bss_info mcu command.

Fixes: c948b5da6bbe ("wifi: mt76: mt7925: add Mediatek Wi-Fi7 driver for mt7925 chips")
Co-developed-by: Deren Wu <deren.wu@mediatek.com>
Signed-off-by: Deren Wu <deren.wu@mediatek.com>
Signed-off-by: Ming Yen Hsieh <mingyen.hsieh@mediatek.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
.../net/wireless/mediatek/mt76/mt7925/main.c | 2 +-
.../net/wireless/mediatek/mt76/mt7925/mcu.c | 33 +++++++++++++++++++
.../net/wireless/mediatek/mt76/mt7925/mcu.h | 19 +++++++++++
3 files changed, 53 insertions(+), 1 deletion(-)

diff --git a/drivers/net/wireless/mediatek/mt76/mt7925/main.c b/drivers/net/wireless/mediatek/mt76/mt7925/main.c
index c74ba9642fc8d..6179798a8845a 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7925/main.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7925/main.c
@@ -711,7 +711,7 @@ static void mt7925_bss_info_changed(struct ieee80211_hw *hw,

if (slottime != phy->slottime) {
phy->slottime = slottime;
- mt792x_mac_set_timeing(phy);
+ mt7925_mcu_set_timing(phy, vif);
}
}

diff --git a/drivers/net/wireless/mediatek/mt76/mt7925/mcu.c b/drivers/net/wireless/mediatek/mt76/mt7925/mcu.c
index 932ecf38672c4..e1dd89a7a79ca 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7925/mcu.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7925/mcu.c
@@ -2244,6 +2244,38 @@ mt7925_mcu_bss_color_tlv(struct sk_buff *skb, struct ieee80211_vif *vif,
vif->bss_conf.he_bss_color.color : 0;
}

+static void
+mt7925_mcu_bss_ifs_tlv(struct sk_buff *skb, struct ieee80211_vif *vif)
+{
+ struct mt792x_vif *mvif = (struct mt792x_vif *)vif->drv_priv;
+ struct mt792x_phy *phy = mvif->phy;
+ struct bss_ifs_time_tlv *ifs_time;
+ struct tlv *tlv;
+
+ tlv = mt76_connac_mcu_add_tlv(skb, UNI_BSS_INFO_IFS_TIME, sizeof(*ifs_time));
+ ifs_time = (struct bss_ifs_time_tlv *)tlv;
+ ifs_time->slot_valid = true;
+ ifs_time->slot_time = cpu_to_le16(phy->slottime);
+}
+
+int mt7925_mcu_set_timing(struct mt792x_phy *phy,
+ struct ieee80211_vif *vif)
+{
+ struct mt792x_vif *mvif = (struct mt792x_vif *)vif->drv_priv;
+ struct mt792x_dev *dev = phy->dev;
+ struct sk_buff *skb;
+
+ skb = __mt7925_mcu_alloc_bss_req(&dev->mt76, &mvif->mt76,
+ MT7925_BSS_UPDATE_MAX_SIZE);
+ if (IS_ERR(skb))
+ return PTR_ERR(skb);
+
+ mt7925_mcu_bss_ifs_tlv(skb, vif);
+
+ return mt76_mcu_skb_send_msg(&dev->mt76, skb,
+ MCU_UNI_CMD(BSS_INFO_UPDATE), true);
+}
+
int mt7925_mcu_add_bss_info(struct mt792x_phy *phy,
struct ieee80211_chanctx_conf *ctx,
struct ieee80211_vif *vif,
@@ -2268,6 +2300,7 @@ int mt7925_mcu_add_bss_info(struct mt792x_phy *phy,
mt7925_mcu_bss_bmc_tlv(skb, phy, ctx, vif, sta);
mt7925_mcu_bss_qos_tlv(skb, vif);
mt7925_mcu_bss_mld_tlv(skb, vif, sta);
+ mt7925_mcu_bss_ifs_tlv(skb, vif);

if (vif->bss_conf.he_support) {
mt7925_mcu_bss_he_tlv(skb, vif, phy);
diff --git a/drivers/net/wireless/mediatek/mt76/mt7925/mcu.h b/drivers/net/wireless/mediatek/mt76/mt7925/mcu.h
index 9fce054e50657..2cf39276118eb 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7925/mcu.h
+++ b/drivers/net/wireless/mediatek/mt76/mt7925/mcu.h
@@ -440,6 +440,22 @@ struct sta_rec_mld {
} __packed link[2];
} __packed;

+struct bss_ifs_time_tlv {
+ __le16 tag;
+ __le16 len;
+ u8 slot_valid;
+ u8 sifs_valid;
+ u8 rifs_valid;
+ u8 eifs_valid;
+ __le16 slot_time;
+ __le16 sifs_time;
+ __le16 rifs_time;
+ __le16 eifs_time;
+ u8 eifs_cck_valid;
+ u8 rsv;
+ __le16 eifs_cck_time;
+} __packed;
+
#define MT7925_STA_UPDATE_MAX_SIZE (sizeof(struct sta_req_hdr) + \
sizeof(struct sta_rec_basic) + \
sizeof(struct sta_rec_bf) + \
@@ -467,6 +483,7 @@ struct sta_rec_mld {
sizeof(struct bss_mld_tlv) + \
sizeof(struct bss_info_uni_he) + \
sizeof(struct bss_info_uni_bss_color) + \
+ sizeof(struct bss_ifs_time_tlv) + \
sizeof(struct tlv))

#define MT_CONNAC3_SKU_POWER_LIMIT 449
@@ -564,6 +581,8 @@ int mt7925_mcu_add_bss_info(struct mt792x_phy *phy,
struct ieee80211_vif *vif,
struct ieee80211_sta *sta,
int enable);
+int mt7925_mcu_set_timing(struct mt792x_phy *phy,
+ struct ieee80211_vif *vif);
int mt7925_mcu_set_deep_sleep(struct mt792x_dev *dev, bool enable);
int mt7925_mcu_set_channel_domain(struct mt76_phy *phy);
int mt7925_mcu_set_radio_en(struct mt792x_phy *phy, bool enable);
--
2.43.0