Re: [PATCH v10] wifi: mt76: mt7915: add wds support when wed is enabled

[Shengyu Qu <wiagn233@outlook.com>]

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Hi Felix,

Do you think this patch is ok?

Best regards,
Shengyu

在 2025/3/11 13:29, Shengyu Qu 写道:
> 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.
> 
> Currently WDS+WED config is completely broken on MT7986/7981 devices if
> without this patch.
> 
> 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>
> Signed-off-by: Shengyu Qu <wiagn233@outlook.com>
> ---
> Changes since v1:
>   - Drop duplicate setting in mmio
>   - Reduce the patch size by redefining mt76_wcid_alloc
> Changes since v2:
>   - Rework wds wcid getting flow
> Changes since v3:
>   - Rebase to next-20240703
>   - Sync with downstream patch
> Changes since v4:
>   - Rebase to next-20240802
> Changes since v5:
>   - Fixed build test error reported by robot
>   - Rebase to next-20240805
> Changes since v6:
>   - Fix potential race conditions on tx/rx packets during the transition
>   - Rebase to Felix's newest codebase
> Changes since v7:
>   - Fix build fail
> Changes since v8:
>   - Changed code as Shih advised
> Changes since v9:
>   - Changed code as Shih advised
>   - Moved mt76_wcid_alloc to mt76.h
> ---
>   drivers/net/wireless/mediatek/mt76/mt76.h     | 15 ++++++
>   .../net/wireless/mediatek/mt76/mt7915/main.c  | 53 +++++++++++++++++--
>   .../net/wireless/mediatek/mt76/mt7915/mcu.c   | 18 +++++--
>   .../net/wireless/mediatek/mt76/mt7915/mcu.h   |  1 +
>   drivers/net/wireless/mediatek/mt76/util.c     | 37 +++++++++++--
>   drivers/net/wireless/mediatek/mt76/util.h     |  2 +-
>   6 files changed, 115 insertions(+), 11 deletions(-)
> 
> diff --git a/drivers/net/wireless/mediatek/mt76/mt76.h b/drivers/net/wireless/mediatek/mt76/mt76.h
> index 132148f7b107..f9f11ce1f3fc 100644
> --- a/drivers/net/wireless/mediatek/mt76/mt76.h
> +++ b/drivers/net/wireless/mediatek/mt76/mt76.h
> @@ -28,6 +28,9 @@
>   
>   #define MT76_TOKEN_FREE_THR	64
>   
> +#define MT76_WED_WDS_MIN    256
> +#define MT76_WED_WDS_MAX    272
> +
>   #define MT_QFLAG_WED_RING	GENMASK(1, 0)
>   #define MT_QFLAG_WED_TYPE	GENMASK(4, 2)
>   #define MT_QFLAG_WED		BIT(5)
> @@ -73,6 +76,12 @@ enum mt76_wed_type {
>   	MT76_WED_RRO_Q_IND,
>   };
>   
> +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);
> @@ -1165,6 +1174,12 @@ void mt76_wed_dma_reset(struct mt76_dev *dev);
>   int mt76_wed_net_setup_tc(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
>   			  struct net_device *netdev, enum tc_setup_type type,
>   			  void *type_data);
> +
> +static inline int mt76_wcid_alloc(u32 *mask, int size)
> +{
> +	return __mt76_wcid_alloc(mask, size, MT76_WED_DEFAULT);
> +}
> +
>   #ifdef CONFIG_NET_MEDIATEK_SOC_WED
>   u32 mt76_wed_init_rx_buf(struct mtk_wed_device *wed, int size);
>   int mt76_wed_offload_enable(struct mtk_wed_device *wed);
> diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/main.c b/drivers/net/wireless/mediatek/mt76/mt7915/main.c
> index 3aa31c5cefa6..fcbf4f971026 100644
> --- a/drivers/net/wireless/mediatek/mt76/mt7915/main.c
> +++ b/drivers/net/wireless/mediatek/mt76/mt7915/main.c
> @@ -744,9 +744,16 @@ int mt7915_mac_sta_add(struct mt76_dev *mdev, struct ieee80211_vif *vif,
>   	struct mt7915_sta *msta = (struct mt7915_sta *)sta->drv_priv;
>   	struct mt7915_vif *mvif = (struct mt7915_vif *)vif->drv_priv;
>   	bool ext_phy = mvif->phy != &dev->phy;
> +	u8 flags = MT76_WED_DEFAULT;
>   	int idx;
>   
> -	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;
>   
> @@ -1271,6 +1278,11 @@ static void mt7915_sta_set_4addr(struct ieee80211_hw *hw,
>   {
>   	struct mt7915_dev *dev = mt7915_hw_dev(hw);
>   	struct mt7915_sta *msta = (struct mt7915_sta *)sta->drv_priv;
> +	int min = MT76_WED_WDS_MIN, max = MT76_WED_WDS_MAX;
> +	struct ieee80211_sta *pre_sta;
> +	struct mt7915_sta *pre_msta;
> +	u8 flags = MT76_WED_DEFAULT;
> +	int tmp_idx;
>   
>   	if (enabled)
>   		set_bit(MT_WCID_FLAG_4ADDR, &msta->wcid.flags);
> @@ -1280,6 +1292,37 @@ static void mt7915_sta_set_4addr(struct ieee80211_hw *hw,
>   	if (!msta->wcid.sta)
>   		return;
>   
> +	if (mtk_wed_device_active(&dev->mt76.mmio.wed) &&
> +	    !is_mt7915(&dev->mt76) &&
> +	    (msta->wcid.idx < min || msta->wcid.idx > max - 1)) {
> +		pre_sta = kmemdup(sta, sizeof(*sta) + sizeof(*msta), GFP_KERNEL | __GFP_ZERO);
> +		if (!pre_sta)
> +			goto error_alloc;
> +		pre_msta = (struct mt7915_sta *)pre_sta->drv_priv;
> +
> +		flags = test_bit(MT_WCID_FLAG_4ADDR, &msta->wcid.flags) ?
> +			MT76_WED_WDS_ACTIVE : MT76_WED_ACTIVE;
> +
> +		tmp_idx = __mt76_wcid_alloc(dev->mt76.wcid_mask, MT7915_WTBL_STA, flags);
> +		if (tmp_idx < 0)
> +			goto error_wcid;
> +		pre_msta->wcid.idx = (u16)tmp_idx;
> +		mt7915_mac_sta_add(&dev->mt76, vif, pre_sta);
> +		rcu_assign_pointer(dev->mt76.wcid[tmp_idx], &msta->wcid);
> +
> +		tmp_idx = msta->wcid.idx;
> +		msta->wcid.idx = pre_msta->wcid.idx;
> +		pre_msta->wcid.idx = (u16)tmp_idx;
> +		rcu_assign_pointer(dev->mt76.wcid[tmp_idx], NULL);
> +
> +		synchronize_rcu();
> +		mt7915_mac_sta_remove(&dev->mt76, vif, pre_sta);
> +
> +error_wcid:
> +		kfree(pre_sta);
> +	}
> +
> +error_alloc:
>   	mt76_connac_mcu_wtbl_update_hdr_trans(&dev->mt76, vif, sta);
>   }
>   
> @@ -1726,15 +1769,19 @@ 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 9d790f234e82..191f966c3f32 100644
> --- a/drivers/net/wireless/mediatek/mt76/mt7915/mcu.c
> +++ b/drivers/net/wireless/mediatek/mt76/mt7915/mcu.c
> @@ -2385,10 +2385,20 @@ int mt7915_mcu_init_firmware(struct mt7915_dev *dev)
>   
>   	mt76_connac_mcu_del_wtbl_all(&dev->mt76);
>   
> -	if ((mtk_wed_device_active(&dev->mt76.mmio.wed) &&
> -	     is_mt7915(&dev->mt76)) ||
> -	    !mtk_wed_get_rx_capa(&dev->mt76.mmio.wed))
> -		mt7915_mcu_wa_cmd(dev, MCU_WA_PARAM_CMD(CAPABILITY), 0, 0, 0);
> +#if IS_ENABLED(CONFIG_NET_MEDIATEK_SOC_WED)
> +	if (mtk_wed_device_active(&dev->mt76.mmio.wed)) {
> +		if (is_mt7915(&dev->mt76) ||
> +		    !mtk_wed_get_rx_capa(&dev->mt76.mmio.wed))
> +			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;
> +	}
> +#endif
>   
>   	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 49476a4182fd..c3dd0cb4a5d3 100644
> --- a/drivers/net/wireless/mediatek/mt76/mt7915/mcu.h
> +++ b/drivers/net/wireless/mediatek/mt76/mt7915/mcu.h
> @@ -278,6 +278,7 @@ enum {
>   	MCU_WA_PARAM_PDMA_RX = 0x04,
>   	MCU_WA_PARAM_CPU_UTIL = 0x0b,
>   	MCU_WA_PARAM_RED = 0x0e,
> +	MCU_WA_PARAM_WED_VERSION = 0x32,
>   	MCU_WA_PARAM_RED_SETTING = 0x40,
>   };
>   
> diff --git a/drivers/net/wireless/mediatek/mt76/util.c b/drivers/net/wireless/mediatek/mt76/util.c
> index 95b3dc96e4c4..e80bef2b33a1 100644
> --- a/drivers/net/wireless/mediatek/mt76/util.c
> +++ b/drivers/net/wireless/mediatek/mt76/util.c
> @@ -42,8 +42,10 @@ 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)
>   {
> +	int max = MT76_WED_WDS_MAX;
> +	int min = MT76_WED_WDS_MIN;
>   	int i, idx = 0, cur;
>   
>   	for (i = 0; i < DIV_ROUND_UP(size, 32); i++) {
> @@ -53,16 +55,45 @@ 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 = max - min - 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, u8 phy_idx)
>   {
> diff --git a/drivers/net/wireless/mediatek/mt76/util.h b/drivers/net/wireless/mediatek/mt76/util.h
> index 260965dde94c..fe95a847182e 100644
> --- a/drivers/net/wireless/mediatek/mt76/util.h
> +++ b/drivers/net/wireless/mediatek/mt76/util.h
> @@ -27,7 +27,7 @@ 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 void
>   mt76_wcid_mask_set(u32 *mask, int idx)


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