netdev - Re: [PATCH 2/3] net: stmmac: Add NXP S32 SoC family support

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Message-ID: <2316e61d-ad7d-46fb-9f55-67964552855a@linaro.org>
Date: Sun, 17 Mar 2024 15:53:19 +0100
From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To: Wadim Mueller <wafgo01@...il.com>
Cc: "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>, 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>,
 Chester Lin <chester62515@...il.com>, Andreas Färber
 <afaerber@...e.de>, Matthias Brugger <mbrugger@...e.com>,
 NXP S32 Linux Team <s32@....com>,
 Alexandre Torgue <alexandre.torgue@...s.st.com>,
 Jose Abreu <joabreu@...opsys.com>,
 Maxime Coquelin <mcoquelin.stm32@...il.com>,
 Michael Turquette <mturquette@...libre.com>, Stephen Boyd
 <sboyd@...nel.org>, Richard Cochran <richardcochran@...il.com>,
 Andrew Halaney <ahalaney@...hat.com>, Simon Horman <horms@...nel.org>,
 Bartosz Golaszewski <bartosz.golaszewski@...aro.org>,
 Johannes Zink <j.zink@...gutronix.de>, Shenwei Wang <shenwei.wang@....com>,
 "Russell King (Oracle)" <rmk+kernel@...linux.org.uk>,
 Swee Leong Ching <leong.ching.swee@...el.com>,
 Giuseppe Cavallaro <peppe.cavallaro@...com>, netdev@...r.kernel.org,
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
 linux-arm-kernel@...ts.infradead.org,
 linux-stm32@...md-mailman.stormreply.com, linux-clk@...r.kernel.org
Subject: Re: [PATCH 2/3] net: stmmac: Add NXP S32 SoC family support

On 15/03/2024 23:27, Wadim Mueller wrote:
> Add support for NXP S32 SoC family's GMAC to the stmmac network driver. This driver implementation is based on the patchset originally contributed by Chester Lin [1], which itself draws heavily from NXP's downstream implementation [2]. The patchset was never merged.
> 
> The S32G2/3 SoCs feature multiple Ethernet interfaces (PFE0, PFE1, PFE2, and GMAC) which can be routed through a SerDes Subsystem, supporting various interfaces such as SGMII and RGMII. However, the current Glue Code lacks support for SerDes routing and pinctrl handling, relying solely on correct settings in U-Boot. Clock settings for this SoC are managed by the ATF Firmware.


Please run scripts/checkpatch.pl and fix reported warnings. Some
warnings can be ignored, but the code here looks like it needs a fix.
Feel free to get in touch if the warning is not clear.

Read how commit msg should be wrapped.

Please wrap commit message according to Linux coding style / submission
process (neither too early nor over the limit):
https://elixir.bootlin.com/linux/v6.4-rc1/source/Documentation/process/submitting-patches.rst#L597

> 
> Changes made compared to [1]:
> 
>     Rebased onto Linux 6.8-rc7
>     Consolidated into a single commit
>     Minor adjustments in naming and usage of dev_err()/dev_info()
> 
> Test Environment:
> The driver has been successfully tested on the official S32G-VNP-RDB3 Reference Design Board from NXP, utilizing an S32G3 SoC. The firmware and U-Boot used were from the BSP39 Release. The official BSP39 Ubuntu 22.04 Release was successfully booted. A network stress test using iperf [3] was also executed without issues.
> 
> [1] https://patchwork.kernel.org/project/netdevbpf/patch/20221031101052.14956-6-clin@suse.com/#25068228
> [2] https://github.com/nxp-auto-linux/linux/blob/release/bsp39.0-5.15.129-rt/drivers/net/ethernet/stmicro/stmmac/dwmac-s32cc.c
> [3] https://linux.die.net/man/1/iperf
> [4] https://github.com/nxp-auto-linux/u-boot
> [5] https://github.com/nxp-auto-linux/arm-trusted-firmware
> 
> Signed-off-by: Wadim Mueller <wafgo01@...il.com>
> ---
>  drivers/net/ethernet/stmicro/stmmac/Kconfig   |  12 +
>  drivers/net/ethernet/stmicro/stmmac/Makefile  |   1 +

That's totally unrelated to DTS. Do not mix independent work in one
patchset. This targets net-next, not SoC, so please send it as separate
patchset when net-next reopens, so after merge window.

>  drivers/net/ethernet/stmicro/stmmac/common.h  |   3 +
>  .../net/ethernet/stmicro/stmmac/dwmac-s32.c   | 313 ++++++++++++++++++
>  .../net/ethernet/stmicro/stmmac/dwmac4_dma.c  |   9 +
>  .../net/ethernet/stmicro/stmmac/dwmac4_dma.h  |   3 +
>  drivers/net/ethernet/stmicro/stmmac/hwif.h    |   5 +
>  .../net/ethernet/stmicro/stmmac/stmmac_main.c |   7 +
>  include/linux/stmmac.h                        |   9 +
>  9 files changed, 362 insertions(+)
>  create mode 100644 drivers/net/ethernet/stmicro/stmmac/dwmac-s32.c
> 
> diff --git a/drivers/net/ethernet/stmicro/stmmac/Kconfig b/drivers/net/ethernet/stmicro/stmmac/Kconfig
> index 85dcda51df05..1cdf2da0251c 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/Kconfig
> +++ b/drivers/net/ethernet/stmicro/stmmac/Kconfig
> @@ -142,6 +142,18 @@ config DWMAC_ROCKCHIP
>  	  This selects the Rockchip RK3288 SoC glue layer support for
>  	  the stmmac device drive


...

> +
> +	plat_dat->safety_feat_cfg->tsoee = 1;
> +	plat_dat->safety_feat_cfg->mrxpee = 1;
> +	plat_dat->safety_feat_cfg->mestee = 1;
> +	plat_dat->safety_feat_cfg->mrxee = 1;
> +	plat_dat->safety_feat_cfg->mtxee = 1;
> +	plat_dat->safety_feat_cfg->epsi = 1;
> +	plat_dat->safety_feat_cfg->edpp = 1;
> +	plat_dat->safety_feat_cfg->prtyen = 1;
> +	plat_dat->safety_feat_cfg->tmouten = 1;
> +
> +	ret = stmmac_dvr_probe(&pdev->dev, plat_dat, &stmmac_res);
> +	if (ret)
> +		goto err_gmac_exit;
> +
> +	return 0;
> +
> +err_gmac_exit:
> +	s32_gmac_exit(pdev, plat_dat->bsp_priv);
> +	return ret;
> +}
> +
> +static const struct of_device_id s32_dwmac_match[] = {
> +	{ .compatible = "nxp,s32-dwmac" },


Missing bindings.

Please run scripts/checkpatch.pl and fix reported warnings. Some
warnings can be ignored, but the code here looks like it needs a fix.
Feel free to get in touch if the warning is not clear.

> +	{}
> +};



Best regards,
Krzysztof