[PATCH,v2] wifi: mt76: mt7915: add wds support when wed is enabled

[Sujuan Chen <sujuan.chen@mediatek.com>]

The current WED only supports 256 wcid, whereas mt7986 can support up to 512 entries,
so firmware provides a rule to get sta_info by DA when wcid is set to 0x3ff by txd.
Also, WED provides a register to overwrite txd wcid, that is, wcid[9:8] can
be overwritten by 0x3 and wcid[7:0] is set to 0xff by host driver.

However, firmware is unable to get sta_info from DA as DA != RA for 4addr cases,
so firmware and wifi host driver both use wcid (256 - 271) and (768 ~ 783)
for sync up to get correct sta_info

Tested-by: Sujuan Chen <sujuan.chen@mediatek.com>
Co-developed-by: Bo Jiao <bo.jiao@mediatek.com>
Signed-off-by: Bo Jiao <bo.jiao@mediatek.com>
Signed-off-by: Sujuan Chen <sujuan.chen@mediatek.com>
---
v2: 
 - drop duplicate settings
 - reduce the patch size by redefining mt76_wcid_alloc
---
 drivers/net/wireless/mediatek/mt76/mt76.h     |  6 +++
 .../net/wireless/mediatek/mt76/mt7915/main.c  | 24 +++++++++--
 .../net/wireless/mediatek/mt76/mt7915/mcu.c   | 13 +++++-
 .../net/wireless/mediatek/mt76/mt7915/mcu.h   |  1 +
 drivers/net/wireless/mediatek/mt76/util.c     | 40 +++++++++++++++++--
 drivers/net/wireless/mediatek/mt76/util.h     |  7 +++-
 6 files changed, 82 insertions(+), 9 deletions(-)

diff --git a/drivers/net/wireless/mediatek/mt76/mt76.h b/drivers/net/wireless/mediatek/mt76/mt76.h
index 32a77a0ae9da..4726378fd0ad 100644
--- a/drivers/net/wireless/mediatek/mt76/mt76.h
+++ b/drivers/net/wireless/mediatek/mt76/mt76.h
@@ -60,6 +60,12 @@ enum mt76_wed_type {
 	MT76_WED_Q_RX,
 };
 
+enum mt76_wed_state {
+	MT76_WED_DEFAULT,
+	MT76_WED_ACTIVE,
+	MT76_WED_WDS_ACTIVE,
+};
+
 struct mt76_bus_ops {
 	u32 (*rr)(struct mt76_dev *dev, u32 offset);
 	void (*wr)(struct mt76_dev *dev, u32 offset, u32 val);
diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/main.c b/drivers/net/wireless/mediatek/mt76/mt7915/main.c
index c40b6098f19a..46a9e4f0396e 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/main.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/main.c
@@ -660,8 +660,15 @@ int mt7915_mac_sta_add(struct mt76_dev *mdev, struct ieee80211_vif *vif,
 	struct mt7915_vif *mvif = (struct mt7915_vif *)vif->drv_priv;
 	bool ext_phy = mvif->phy != &dev->phy;
 	int ret, idx;
+	u8 flags = MT76_WED_DEFAULT;
 
-	idx = mt76_wcid_alloc(dev->mt76.wcid_mask, MT7915_WTBL_STA);
+	if (mtk_wed_device_active(&dev->mt76.mmio.wed) &&
+	    !is_mt7915(&dev->mt76)) {
+		flags = test_bit(MT_WCID_FLAG_4ADDR, &msta->wcid.flags) ?
+		       MT76_WED_WDS_ACTIVE : MT76_WED_ACTIVE;
+	}
+
+	idx = __mt76_wcid_alloc(mdev->wcid_mask, MT7915_WTBL_STA, flags);
 	if (idx < 0)
 		return -ENOSPC;
 
@@ -1115,6 +1122,13 @@ static void mt7915_sta_set_4addr(struct ieee80211_hw *hw,
 	else
 		clear_bit(MT_WCID_FLAG_4ADDR, &msta->wcid.flags);
 
+	if (mtk_wed_device_active(&dev->mt76.mmio.wed) &&
+	    !is_mt7915(&dev->mt76)) {
+		mt7915_sta_remove(hw, vif, sta);
+		mt76_sta_pre_rcu_remove(hw, vif, sta);
+		mt7915_sta_add(hw, vif, sta);
+	}
+
 	mt76_connac_mcu_wtbl_update_hdr_trans(&dev->mt76, vif, sta);
 }
 
@@ -1479,15 +1493,19 @@ mt7915_net_fill_forward_path(struct ieee80211_hw *hw,
 	if (!mtk_wed_device_active(wed))
 		return -ENODEV;
 
-	if (msta->wcid.idx > 0xff)
+	if (msta->wcid.idx > MT7915_WTBL_STA)
 		return -EIO;
 
 	path->type = DEV_PATH_MTK_WDMA;
 	path->dev = ctx->dev;
 	path->mtk_wdma.wdma_idx = wed->wdma_idx;
 	path->mtk_wdma.bss = mvif->mt76.idx;
-	path->mtk_wdma.wcid = is_mt7915(&dev->mt76) ? msta->wcid.idx : 0x3ff;
 	path->mtk_wdma.queue = phy != &dev->phy;
+	if (test_bit(MT_WCID_FLAG_4ADDR, &msta->wcid.flags) ||
+	    is_mt7915(&dev->mt76))
+		path->mtk_wdma.wcid = msta->wcid.idx;
+	else
+		path->mtk_wdma.wcid = 0x3ff;
 
 	ctx->dev = NULL;
 
diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/mcu.c b/drivers/net/wireless/mediatek/mt76/mt7915/mcu.c
index 9e479d41eab5..3e73a95ff029 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/mcu.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/mcu.c
@@ -2307,8 +2307,17 @@ int mt7915_mcu_init_firmware(struct mt7915_dev *dev)
 	if (ret)
 		return ret;
 
-	if (mtk_wed_device_active(&dev->mt76.mmio.wed) && is_mt7915(&dev->mt76))
-		mt7915_mcu_wa_cmd(dev, MCU_WA_PARAM_CMD(CAPABILITY), 0, 0, 0);
+	if (mtk_wed_device_active(&dev->mt76.mmio.wed)) {
+		if (is_mt7915(&dev->mt76))
+			ret = mt7915_mcu_wa_cmd(dev, MCU_WA_PARAM_CMD(CAPABILITY),
+						0, 0, 0);
+		else
+			ret = mt7915_mcu_wa_cmd(dev, MCU_WA_PARAM_CMD(SET),
+						MCU_WA_PARAM_WED_VERSION,
+						dev->mt76.mmio.wed.rev_id, 0);
+		if (ret)
+			return ret;
+	}
 
 	ret = mt7915_mcu_set_mwds(dev, 1);
 	if (ret)
diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/mcu.h b/drivers/net/wireless/mediatek/mt76/mt7915/mcu.h
index 46c517e50ae4..b0e5c0e9fa67 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/mcu.h
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/mcu.h
@@ -271,6 +271,7 @@ enum {
 	MCU_WA_PARAM_PDMA_RX = 0x04,
 	MCU_WA_PARAM_CPU_UTIL = 0x0b,
 	MCU_WA_PARAM_RED = 0x0e,
+	MCU_WA_PARAM_WED_VERSION = 0x32,
 };
 
 enum mcu_mmps_mode {
diff --git a/drivers/net/wireless/mediatek/mt76/util.c b/drivers/net/wireless/mediatek/mt76/util.c
index 581964425468..5cd5ede0438f 100644
--- a/drivers/net/wireless/mediatek/mt76/util.c
+++ b/drivers/net/wireless/mediatek/mt76/util.c
@@ -42,9 +42,14 @@ bool __mt76_poll_msec(struct mt76_dev *dev, u32 offset, u32 mask, u32 val,
 }
 EXPORT_SYMBOL_GPL(__mt76_poll_msec);
 
-int mt76_wcid_alloc(u32 *mask, int size)
+int __mt76_wcid_alloc(u32 *mask, int size, u8 flag)
 {
+#define MT76_WED_WDS_MIN    256
+#define MT76_WED_WDS_CNT    16
+
 	int i, idx = 0, cur;
+	int min = MT76_WED_WDS_MIN;
+	int max = min + MT76_WED_WDS_CNT;
 
 	for (i = 0; i < DIV_ROUND_UP(size, 32); i++) {
 		idx = ffs(~mask[i]);
@@ -53,16 +58,45 @@ int mt76_wcid_alloc(u32 *mask, int size)
 
 		idx--;
 		cur = i * 32 + idx;
-		if (cur >= size)
+
+		switch (flag) {
+		case MT76_WED_ACTIVE:
+			if (cur >= min && cur < max)
+				continue;
+
+			if (cur >= size) {
+				u32 end = MT76_WED_WDS_CNT - 1;
+
+				i = min / 32;
+				idx = ffs(~mask[i] & GENMASK(end, 0));
+				if (!idx)
+					goto error;
+				idx--;
+				cur = min + idx;
+			}
+
 			break;
+		case MT76_WED_WDS_ACTIVE:
+			if (cur < min)
+				continue;
+			if (cur >= max)
+				goto error;
+
+			break;
+		default:
+			if (cur >= size)
+				goto error;
+			break;
+		}
 
 		mask[i] |= BIT(idx);
 		return cur;
 	}
 
+error:
 	return -1;
 }
-EXPORT_SYMBOL_GPL(mt76_wcid_alloc);
+EXPORT_SYMBOL_GPL(__mt76_wcid_alloc);
 
 int mt76_get_min_avg_rssi(struct mt76_dev *dev, bool ext_phy)
 {
diff --git a/drivers/net/wireless/mediatek/mt76/util.h b/drivers/net/wireless/mediatek/mt76/util.h
index 260965dde94c..99b7263c0a20 100644
--- a/drivers/net/wireless/mediatek/mt76/util.h
+++ b/drivers/net/wireless/mediatek/mt76/util.h
@@ -27,7 +27,12 @@ enum {
 #define MT76_INCR(_var, _size) \
 	(_var = (((_var) + 1) % (_size)))
 
-int mt76_wcid_alloc(u32 *mask, int size);
+int __mt76_wcid_alloc(u32 *mask, int size, u8 flags);
+
+static inline int mt76_wcid_alloc(u32 *mask, int size)
+{
+	return __mt76_wcid_alloc(mask, size, 0);
+}
 
 static inline void
 mt76_wcid_mask_set(u32 *mask, int idx)
-- 
2.18.0