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wifi: mt76: mt7996: add support for ERP CTS & HT protection

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This patch adds support for handling BSS_CHANGED_ERP_CTS_PROT and
BSS_CHANGED_HT.

With this change, when the Wi-Fi driver needs to adjust its behavior for
compatibility or performance, especially concerning older 11g/n devices,
by enabling or disabling CTS protection frames, often for hidden SSIDs or
to manage legacy clients.

It also introduces debugfs options to manually control protection mode,
allowing users to select betweenno protection, RTS/CTS, and CTS-to-self.

Reviewed-by: Money Wang <[email protected]>
Signed-off-by: Ryder Lee <[email protected]>
Link: https://patch.msgid.link/942ddb5777d5c201930d6609e9ba877a6ba6714a.1768879119.git.ryder.lee@mediatek.com
Signed-off-by: Felix Fietkau <[email protected]>
This commit is contained in:
Ryder Lee
2026-01-27 11:11:14 +00:00
committed by Felix Fietkau
parent 8ae9ae4225
commit 51a3b8c35d
5 changed files with 59 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files
mt76_connac_mcu.h
+1
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@@ -1363,6 +1363,7 @@ enum {
UNI_BSS_INFO_BASIC = 0,
UNI_BSS_INFO_RA = 1,
UNI_BSS_INFO_RLM = 2,
UNI_BSS_INFO_PROTECT_INFO = 3,
UNI_BSS_INFO_BSS_COLOR = 4,
UNI_BSS_INFO_HE_BASIC = 5,
UNI_BSS_INFO_11V_MBSSID = 6,
mt7996/main.c
+4
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@@ -876,6 +876,10 @@ mt7996_link_info_changed(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
!!(changed & BSS_CHANGED_BSSID));
}
if (changed & BSS_CHANGED_HT || changed & BSS_CHANGED_ERP_CTS_PROT)
mt7996_mcu_set_protection(phy, link, info->ht_operation_mode,
info->use_cts_prot);
if (changed & BSS_CHANGED_ERP_SLOT) {
int slottime = info->use_short_slot ? 9 : 20;
mt7996/mcu.c
+46
View File
@@ -1247,6 +1247,52 @@ int mt7996_mcu_update_bss_rfch(struct mt7996_phy *phy, struct mt7996_vif_link *l
MCU_WMWA_UNI_CMD(BSS_INFO_UPDATE), true);
}
int mt7996_mcu_set_protection(struct mt7996_phy *phy, struct mt7996_vif_link *link,
u8 ht_mode, bool use_cts_prot)
{
struct mt7996_dev *dev = phy->dev;
struct bss_prot_tlv *prot;
struct sk_buff *skb;
struct tlv *tlv;
enum {
PROT_NONMEMBER = BIT(1),
PROT_20MHZ = BIT(2),
PROT_NONHT_MIXED = BIT(3),
PROT_LEGACY_ERP = BIT(5),
PROT_NONGF_STA = BIT(7),
};
skb = __mt7996_mcu_alloc_bss_req(&dev->mt76, &link->mt76,
MT7996_BSS_UPDATE_MAX_SIZE);
if (IS_ERR(skb))
return PTR_ERR(skb);
tlv = mt7996_mcu_add_uni_tlv(skb, UNI_BSS_INFO_PROTECT_INFO,
sizeof(*prot));
prot = (struct bss_prot_tlv *)tlv;
switch (ht_mode & IEEE80211_HT_OP_MODE_PROTECTION) {
case IEEE80211_HT_OP_MODE_PROTECTION_NONMEMBER:
prot->prot_mode = cpu_to_le32(PROT_NONMEMBER);
break;
case IEEE80211_HT_OP_MODE_PROTECTION_20MHZ:
prot->prot_mode = cpu_to_le32(PROT_20MHZ);
break;
case IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED:
prot->prot_mode = cpu_to_le32(PROT_NONHT_MIXED);
break;
}
if (ht_mode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT)
prot->prot_mode |= cpu_to_le32(PROT_NONGF_STA);
if (use_cts_prot)
prot->prot_mode |= cpu_to_le32(PROT_LEGACY_ERP);
return mt76_mcu_skb_send_msg(&dev->mt76, skb,
MCU_WM_UNI_CMD(BSS_INFO_UPDATE), true);
}
int mt7996_mcu_set_timing(struct mt7996_phy *phy, struct ieee80211_vif *vif,
struct ieee80211_bss_conf *link_conf)
{
mt7996/mcu.h
+6
View File
@@ -481,6 +481,12 @@ struct bss_mld_tlv {
u8 __rsv[2];
} __packed;
struct bss_prot_tlv {
__le16 tag;
__le16 len;
__le32 prot_mode;
} __packed;
struct sta_rec_ht_uni {
__le16 tag;
__le16 len;
mt7996/mt7996.h
+2
View File
@@ -723,6 +723,8 @@ int mt7996_mcu_set_radar_th(struct mt7996_dev *dev, int index,
const struct mt7996_dfs_pattern *pattern);
int mt7996_mcu_set_radio_en(struct mt7996_phy *phy, bool enable);
int mt7996_mcu_set_rts_thresh(struct mt7996_phy *phy, u32 val);
int mt7996_mcu_set_protection(struct mt7996_phy *phy, struct mt7996_vif_link *link,
u8 ht_mode, bool use_cts_prot);
int mt7996_mcu_set_timing(struct mt7996_phy *phy, struct ieee80211_vif *vif,
struct ieee80211_bss_conf *link_conf);
int mt7996_mcu_get_chan_mib_info(struct mt7996_phy *phy, bool chan_switch);