[PATCH] wifi: mt76: mt7915: enable BSS_CHANGED_MU_GROUPS support

[Ryder Lee]

The Group ID Management frame is an Action frame of category VHT.
It is transmitted by the AP to assign or change the user position
of a STA for one or more group IDs.

Also, sniffer can use a given group id to monitor STA that belongs
to that group.

Notify underlying driver of changes via BSS_CHANGED_MU_GROUPS.

Signed-off-by: Ryder Lee <ryder.lee at mediatek.com>
Change-Id: I3d2f5508a2b6eb7c929c3997c31a9285713c8bea
---
 .../net/wireless/mediatek/mt76/mt7915/init.c  |  1 +
 .../net/wireless/mediatek/mt76/mt7915/main.c  | 31 +++++++++++++++++++
 .../net/wireless/mediatek/mt76/mt7915/regs.h  | 12 +++++--
 3 files changed, 42 insertions(+), 2 deletions(-)

diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/init.c b/drivers/net/wireless/mediatek/mt76/mt7915/init.c
index ee976657bfc3..794469fdedac 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/init.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/init.c
@@ -370,6 +370,7 @@ mt7915_init_wiphy(struct mt7915_phy *phy)
 	wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_FILS_DISCOVERY);
 	wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_ACK_SIGNAL_SUPPORT);
 	wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_CAN_REPLACE_PTK0);
+	wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_MU_MIMO_AIR_SNIFFER);
 
 	if (!is_mt7915(&dev->mt76))
 		wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_STA_TX_PWR);
diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/main.c b/drivers/net/wireless/mediatek/mt76/mt7915/main.c
index f8d6323bd42d..102cbc4da2f4 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/main.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/main.c
@@ -593,6 +593,34 @@ mt7915_update_bss_color(struct ieee80211_hw *hw,
 	}
 }
 
+static void
+mt7915_update_mu_group(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
+		       struct ieee80211_bss_conf *info)
+{
+	struct mt7915_phy *phy = mt7915_hw_phy(hw);
+	struct mt7915_dev *dev = mt7915_hw_dev(hw);
+	u8 i, band = phy->mt76->band_idx;
+	u32 *mu;
+
+	mu = (u32 *)info->mu_group.membership;
+	for (i = 0; i < WLAN_MEMBERSHIP_LEN / sizeof(*mu); i++) {
+		if (is_mt7916(&dev->mt76))
+			mt76_wr(dev, MT_WF_PHY_RX_GID_TAB_VLD_MT7916(band, i),
+				mu[i]);
+		else
+			mt76_wr(dev, MT_WF_PHY_RX_GID_TAB_VLD(band, i), mu[i]);
+	}
+
+	mu = (u32 *)info->mu_group.position;
+	for (i = 0; i < WLAN_USER_POSITION_LEN / sizeof(*mu); i++) {
+		if (is_mt7916(&dev->mt76))
+			mt76_wr(dev, MT_WF_PHY_RX_GID_TAB_POS_MT7916(band, i),
+				mu[i]);
+		else
+			mt76_wr(dev, MT_WF_PHY_RX_GID_TAB_POS(band, i), mu[i]);
+	}
+}
+
 static void mt7915_bss_info_changed(struct ieee80211_hw *hw,
 				    struct ieee80211_vif *vif,
 				    struct ieee80211_bss_conf *info,
@@ -646,6 +674,9 @@ static void mt7915_bss_info_changed(struct ieee80211_hw *hw,
 		       BSS_CHANGED_FILS_DISCOVERY))
 		mt7915_mcu_add_beacon(hw, vif, info->enable_beacon, changed);
 
+	if (changed & BSS_CHANGED_MU_GROUPS)
+		mt7915_update_mu_group(hw, vif, info);
+
 	mutex_unlock(&dev->mt76.mutex);
 }
 
diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/regs.h b/drivers/net/wireless/mediatek/mt76/mt7915/regs.h
index 588cd87e24e9..534e039e0deb 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/regs.h
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/regs.h
@@ -1197,13 +1197,21 @@ enum offs_rev {
 #define MT_WF_PHY_BASE			0x83080000
 #define MT_WF_PHY(ofs)			(MT_WF_PHY_BASE + (ofs))
 
+#define MT_WF_PHY_RX_GID_TAB_VLD(_n, i)		MT_WF_PHY(0x1054 + (i) * 4 + \
+							  ((_n) << 16))
+#define MT_WF_PHY_RX_GID_TAB_VLD_MT7916(_n, i)	MT_WF_PHY(0x1054 + (i) * 4 + \
+							  ((_n) << 20))
+#define MT_WF_PHY_RX_GID_TAB_POS(_n, i)		MT_WF_PHY(0x105c + (i) * 4 + \
+							  ((_n) << 16))
+#define MT_WF_PHY_RX_GID_TAB_POS_MT7916(_n, i)	MT_WF_PHY(0x105c + (i) * 4 + \
+							  ((_n) << 20))
 #define MT_WF_PHY_RX_CTRL1(_phy)	MT_WF_PHY(0x2004 + ((_phy) << 16))
 #define MT_WF_PHY_RX_CTRL1_MT7916(_phy)	MT_WF_PHY(0x2004 + ((_phy) << 20))
 #define MT_WF_PHY_RX_CTRL1_IPI_EN	GENMASK(2, 0)
 #define MT_WF_PHY_RX_CTRL1_STSCNT_EN	GENMASK(11, 9)
 
-#define MT_WF_PHY_RXTD12(_phy)		MT_WF_PHY(0x8230 + ((_phy) << 16))
-#define MT_WF_PHY_RXTD12_MT7916(_phy)	MT_WF_PHY(0x8230 + ((_phy) << 20))
+#define MT_WF_PHY_RXTD12(_phy)			MT_WF_PHY(0x8230 + ((_phy) << 16))
+#define MT_WF_PHY_RXTD12_MT7916(_phy)		MT_WF_PHY(0x8230 + ((_phy) << 20))
 #define MT_WF_PHY_RXTD12_IRPI_SW_CLR_ONLY	BIT(18)
 #define MT_WF_PHY_RXTD12_IRPI_SW_CLR		BIT(29)
 
-- 
2.18.0