linux-kernel - Re: [PATCH,RESEND] net: ethernet: mtk_wed: add wcid overwritten support for wed v1

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Message-ID: <Y3yajX0EF/aU5HJr@localhost.localdomain>
Date:   Tue, 22 Nov 2022 10:46:53 +0100
From:   Lorenzo Bianconi <lorenzo@...nel.org>
To:     Sujuan Chen <sujuan.chen@...iatek.com>
Cc:     netdev@...r.kernel.org, Felix Fietkau <nbd@....name>,
        linux-kernel@...r.kernel.org, Mark Lee <Mark-MC.Lee@...iatek.com>,
        Evelyn Tsai <evelyn.tsai@...iatek.com>,
        Bo Jiao <bo.jiao@...iatek.com>,
        linux-mediatek <linux-mediatek@...ts.infradead.org>
Subject: Re: [PATCH,RESEND] net: ethernet: mtk_wed: add wcid overwritten
 support for wed v1

> All wed versions should enable wcid overwritten feature,
> since the wcid size is controlled by the wlan driver.
> 
> Tested-by: Sujuan Chen <sujuan.chen@...iatek.com>
> Co-developed-by: Bo Jiao <bo.jiao@...iatek.com>
> Signed-off-by: Bo Jiao <bo.jiao@...iatek.com>
> Signed-off-by: Sujuan Chen <sujuan.chen@...iatek.com>
> ---
>  drivers/net/ethernet/mediatek/mtk_wed.c      | 9 ++++++---
>  drivers/net/ethernet/mediatek/mtk_wed_regs.h | 2 ++
>  include/linux/soc/mediatek/mtk_wed.h         | 3 +++
>  3 files changed, 11 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/net/ethernet/mediatek/mtk_wed.c b/drivers/net/ethernet/mediatek/mtk_wed.c
> index 7d8842378c2b..a20093803e04 100644
> --- a/drivers/net/ethernet/mediatek/mtk_wed.c
> +++ b/drivers/net/ethernet/mediatek/mtk_wed.c
> @@ -526,9 +526,9 @@ mtk_wed_dma_disable(struct mtk_wed_device *dev)
>  			MTK_WED_WPDMA_RX_D_RX_DRV_EN);
>  		wed_clr(dev, MTK_WED_WDMA_GLO_CFG,
>  			MTK_WED_WDMA_GLO_CFG_TX_DDONE_CHK);
> -
> -		mtk_wed_set_512_support(dev, false);
>  	}
> +
> +	mtk_wed_set_512_support(dev, false);
>  }
>  
>  static void
> @@ -1290,9 +1290,10 @@ mtk_wed_start(struct mtk_wed_device *dev, u32 irq_mask)
>  		if (mtk_wed_rro_cfg(dev))
>  			return;
>  
> -		mtk_wed_set_512_support(dev, dev->wlan.wcid_512);
>  	}
>  
> +	mtk_wed_set_512_support(dev, dev->wlan.wcid_512);
> +
>  	mtk_wed_dma_enable(dev);
>  	dev->running = true;
>  }
> @@ -1338,6 +1339,8 @@ mtk_wed_attach(struct mtk_wed_device *dev)
>  	dev->irq = hw->irq;
>  	dev->wdma_idx = hw->index;
>  	dev->version = hw->version;
> +	if (hw->version != 1)
> +		dev->rev_id = wed_r32(dev, MTK_WED_REV_ID);

nitpick: since rev_id is valid just for hw->version > 1 and it will be used by
mt76 in the future, you can move it few lines below where we already check
hw->version and get rid of the unnecessary if condition. Something like:

	if (hw->version == 1) {
		...
	} else {
		dev->rev_id = wed_r32(dev, MTK_WED_REV_ID);
		ret = mtk_wed_wo_init(hw);
	}

Regards,
Lorenzo
>  
>  	if (hw->eth->dma_dev == hw->eth->dev &&
>  	    of_dma_is_coherent(hw->eth->dev->of_node))
> diff --git a/drivers/net/ethernet/mediatek/mtk_wed_regs.h b/drivers/net/ethernet/mediatek/mtk_wed_regs.h
> index 9e39dace95eb..873d50b9a6e6 100644
> --- a/drivers/net/ethernet/mediatek/mtk_wed_regs.h
> +++ b/drivers/net/ethernet/mediatek/mtk_wed_regs.h
> @@ -20,6 +20,8 @@ struct mtk_wdma_desc {
>  	__le32 info;
>  } __packed __aligned(4);
>  
> +#define MTK_WED_REV_ID					0x004
> +
>  #define MTK_WED_RESET					0x008
>  #define MTK_WED_RESET_TX_BM				BIT(0)
>  #define MTK_WED_RESET_TX_FREE_AGENT			BIT(4)
> diff --git a/include/linux/soc/mediatek/mtk_wed.h b/include/linux/soc/mediatek/mtk_wed.h
> index 8294978f4bca..1b1ef57609f7 100644
> --- a/include/linux/soc/mediatek/mtk_wed.h
> +++ b/include/linux/soc/mediatek/mtk_wed.h
> @@ -85,6 +85,9 @@ struct mtk_wed_device {
>  	int irq;
>  	u8 version;
>  
> +	/* used by wlan driver */
> +	u32 rev_id;
> +
>  	struct mtk_wed_ring tx_ring[MTK_WED_TX_QUEUES];
>  	struct mtk_wed_ring rx_ring[MTK_WED_RX_QUEUES];
>  	struct mtk_wed_ring txfree_ring;
> -- 
> 2.18.0
> 

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