linux-kernel - Re: [PATCH v2 2/2] net: stmmac: dwmac-imx: set TSO/TBS TX queues default settings

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Date: Fri, 26 Jan 2024 20:24:29 +0000
From: Vadim Fedorenko <vadim.fedorenko@...ux.dev>
To: Esben Haabendal <esben@...nix.com>, netdev@...r.kernel.org,
 Alexandre Torgue <alexandre.torgue@...s.st.com>,
 Jose Abreu <joabreu@...opsys.com>, "David S. Miller" <davem@...emloft.net>,
 Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>,
 Paolo Abeni <pabeni@...hat.com>, Shawn Guo <shawnguo@...nel.org>,
 Sascha Hauer <s.hauer@...gutronix.de>,
 Pengutronix Kernel Team <kernel@...gutronix.de>,
 Fabio Estevam <festevam@...il.com>, NXP Linux Team <linux-imx@....com>,
 Maxime Coquelin <mcoquelin.stm32@...il.com>
Cc: Rohan G Thomas <rohan.g.thomas@...el.com>,
 "Abhishek Chauhan (ABC)" <quic_abchauha@...cinc.com>,
 linux-stm32@...md-mailman.stormreply.com,
 linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 2/2] net: stmmac: dwmac-imx: set TSO/TBS TX queues
 default settings

On 26/01/2024 09:10, Esben Haabendal wrote:
> TSO and TBS cannot coexist. For now we set i.MX Ethernet QOS controller to
> use the first TX queue with TSO and the rest for TBS.
> 
> TX queues with TBS can support etf qdisc hw offload.
> 
> Signed-off-by: Esben Haabendal <esben@...nix.com>
> ---
>   drivers/net/ethernet/stmicro/stmmac/dwmac-imx.c | 4 ++++
>   1 file changed, 4 insertions(+)
> 
> diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-imx.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-imx.c
> index 8f730ada71f9..6b65420e11b5 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/dwmac-imx.c
> +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-imx.c
> @@ -353,6 +353,10 @@ static int imx_dwmac_probe(struct platform_device *pdev)
>   	if (data->flags & STMMAC_FLAG_HWTSTAMP_CORRECT_LATENCY)
>   		plat_dat->flags |= STMMAC_FLAG_HWTSTAMP_CORRECT_LATENCY;
>   
> +	/* Default TX Q0 to use TSO and rest TXQ for TBS */
> +	for (int i = 1; i < plat_dat->tx_queues_to_use; i++)
> +		plat_dat->tx_queues_cfg[i].tbs_en = 1;
> +
>   	plat_dat->host_dma_width = dwmac->ops->addr_width;
>   	plat_dat->init = imx_dwmac_init;
>   	plat_dat->exit = imx_dwmac_exit;

Reviewed-by: Vadim Fedorenko <vadim.fedorenko@...ux.dev>