linux-kernel - Re: [PATCH net-next v3 04/10] net: stmmac: enlarge max rx/tx queues and channels to 16

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Message-ID: <1c327ece-ce22-1d82-92ef-9db281e93f92@foss.st.com>
Date:   Thu, 10 Aug 2023 16:43:39 +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 04/10] net: stmmac: enlarge max rx/tx queues
 and channels to 16

On 8/9/23 18:50, Jisheng Zhang wrote:
> xgmac supports up to 16 rx/tx queues and up to 16 channels.
> 
> Signed-off-by: Jisheng Zhang <jszhang@...nel.org>
> ---
>   drivers/net/ethernet/stmicro/stmmac/dwxgmac2_core.c | 5 ++---
>   include/linux/stmmac.h                              | 6 +++---
>   2 files changed, 5 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_core.c b/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_core.c
> index a0c2ef8bb0ac..aaae82d3d9dc 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_core.c
> +++ b/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_core.c
> @@ -202,9 +202,8 @@ static void dwxgmac2_map_mtl_to_dma(struct mac_device_info *hw, u32 queue,
>   	void __iomem *ioaddr = hw->pcsr;
>   	u32 value, reg;
>   
> -	reg = (queue < 4) ? XGMAC_MTL_RXQ_DMA_MAP0 : XGMAC_MTL_RXQ_DMA_MAP1;
> -	if (queue >= 4)
> -		queue -= 4;
> +	reg = XGMAC_MTL_RXQ_DMA_MAP0 + (queue & ~0x3);
> +	queue &= 0x3;
>   
>   	value = readl(ioaddr + reg);
>   	value &= ~XGMAC_QxMDMACH(queue);
> diff --git a/include/linux/stmmac.h b/include/linux/stmmac.h
> index ef67dba775d0..11671fd6adee 100644
> --- a/include/linux/stmmac.h
> +++ b/include/linux/stmmac.h
> @@ -15,9 +15,9 @@
>   #include <linux/platform_device.h>
>   #include <linux/phy.h>
>   
> -#define MTL_MAX_RX_QUEUES	8
> -#define MTL_MAX_TX_QUEUES	8
> -#define STMMAC_CH_MAX		8
> +#define MTL_MAX_RX_QUEUES	16
> +#define MTL_MAX_TX_QUEUES	16
> +#define STMMAC_CH_MAX		16
>   
>   #define STMMAC_RX_COE_NONE	0
>   #define STMMAC_RX_COE_TYPE1	1

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

Regards
Alex