linux-kernel - Re: [PATCH net-next v3 02/10] net: stmmac: xgmac: add more feature parsing from hw cap

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Message-ID: <2379f0b2-463a-236c-05f4-b073470588ea@foss.st.com>
Date:   Thu, 10 Aug 2023 15:46:01 +0200
From:   Alexandre TORGUE <alexandre.torgue@...s.st.com>
To:     Jisheng Zhang <jszhang@...nel.org>,
        "David S . Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Giuseppe Cavallaro <peppe.cavallaro@...com>,
        Jose Abreu <joabreu@...opsys.com>
CC:     <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <devicetree@...r.kernel.org>,
        <linux-stm32@...md-mailman.stormreply.com>,
        <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH net-next v3 02/10] net: stmmac: xgmac: add more feature
 parsing from hw cap

On 8/9/23 18:49, Jisheng Zhang wrote:
> The XGMAC_HWFEAT_GMIISEL bit also indicates whether support 10/100Mbps
> or not.
> The XGMAC_HWFEAT_HDSEL bit indicates whether support half duplex or
> not.
> The XGMAC_HWFEAT_ADDMACADRSEL bit indicates whether support Multiple
> MAC address registers or not.
> The XGMAC_HWFEAT_SMASEL bit indicates whether support SMA (MDIO)
> Interface or not.
> 
> Signed-off-by: Jisheng Zhang <jszhang@...nel.org>
> ---
>   drivers/net/ethernet/stmicro/stmmac/dwxgmac2.h     | 3 +++
>   drivers/net/ethernet/stmicro/stmmac/dwxgmac2_dma.c | 4 ++++
>   2 files changed, 7 insertions(+)
> 
> diff --git a/drivers/net/ethernet/stmicro/stmmac/dwxgmac2.h b/drivers/net/ethernet/stmicro/stmmac/dwxgmac2.h
> index 153321fe42c3..81cbb13a101d 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/dwxgmac2.h
> +++ b/drivers/net/ethernet/stmicro/stmmac/dwxgmac2.h
> @@ -111,6 +111,7 @@
>   #define XGMAC_LPI_TIMER_CTRL		0x000000d4
>   #define XGMAC_HW_FEATURE0		0x0000011c
>   #define XGMAC_HWFEAT_SAVLANINS		BIT(27)
> +#define XGMAC_HWFEAT_ADDMACADRSEL	GENMASK(22, 18)
>   #define XGMAC_HWFEAT_RXCOESEL		BIT(16)
>   #define XGMAC_HWFEAT_TXCOESEL		BIT(14)
>   #define XGMAC_HWFEAT_EEESEL		BIT(13)
> @@ -121,7 +122,9 @@
>   #define XGMAC_HWFEAT_MMCSEL		BIT(8)
>   #define XGMAC_HWFEAT_MGKSEL		BIT(7)
>   #define XGMAC_HWFEAT_RWKSEL		BIT(6)
> +#define XGMAC_HWFEAT_SMASEL		BIT(5)
>   #define XGMAC_HWFEAT_VLHASH		BIT(4)
> +#define XGMAC_HWFEAT_HDSEL		BIT(3)
>   #define XGMAC_HWFEAT_GMIISEL		BIT(1)
>   #define XGMAC_HW_FEATURE1		0x00000120
>   #define XGMAC_HWFEAT_L3L4FNUM		GENMASK(30, 27)
> diff --git a/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_dma.c b/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_dma.c
> index b09395f5edcb..b5ba4e0cca55 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_dma.c
> +++ b/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_dma.c
> @@ -406,6 +406,10 @@ static int dwxgmac2_get_hw_feature(void __iomem *ioaddr,
>   	dma_cap->pmt_remote_wake_up = (hw_cap & XGMAC_HWFEAT_RWKSEL) >> 6;
>   	dma_cap->vlhash = (hw_cap & XGMAC_HWFEAT_VLHASH) >> 4;
>   	dma_cap->mbps_1000 = (hw_cap & XGMAC_HWFEAT_GMIISEL) >> 1;
> +	dma_cap->mbps_10_100 = (hw_cap & XGMAC_HWFEAT_GMIISEL) >> 1;
> +	dma_cap->half_duplex = (hw_cap & XGMAC_HWFEAT_HDSEL) >> 3;
> +	dma_cap->multi_addr = (hw_cap & XGMAC_HWFEAT_ADDMACADRSEL) >> 18;
> +	dma_cap->sma_mdio = (hw_cap & XGMAC_HWFEAT_SMASEL) >> 5;
>   
>   	/* MAC HW feature 1 */
>   	hw_cap = readl(ioaddr + XGMAC_HW_FEATURE1);

Acked-by: Alexandre TORGUE <alexandre.torgue@...s.st.com>

Regards
Alex