linux-kernel - Re: [PATCH v11 03/10] net: ti: icssg-prueth: Add Firmware config and classification APIs.

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Message-ID: <ZL94/L1RMlU5TiAb@corigine.com>
Date:   Tue, 25 Jul 2023 09:25:48 +0200
From:   Simon Horman <simon.horman@...igine.com>
To:     MD Danish Anwar <danishanwar@...com>
Cc:     Randy Dunlap <rdunlap@...radead.org>,
        Roger Quadros <rogerq@...nel.org>,
        Vignesh Raghavendra <vigneshr@...com>,
        Andrew Lunn <andrew@...n.ch>,
        Richard Cochran <richardcochran@...il.com>,
        Conor Dooley <conor+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Eric Dumazet <edumazet@...gle.com>,
        "David S. Miller" <davem@...emloft.net>, nm@...com, srk@...com,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        netdev@...r.kernel.org, linux-omap@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v11 03/10] net: ti: icssg-prueth: Add Firmware config and
 classification APIs.

On Mon, Jul 24, 2023 at 04:59:27PM +0530, MD Danish Anwar wrote:
> Add icssg_config.h / .c and icssg_classifier.c files. These are firmware
> configuration and classification related files. These will be used by
> ICSSG ethernet driver.
> 
> Signed-off-by: MD Danish Anwar <danishanwar@...com>
> Reviewed-by: Andrew Lunn <andrew@...n.ch>

Hi Danish,

some feedback from my side.

...

> diff --git a/drivers/net/ethernet/ti/icssg_classifier.c b/drivers/net/ethernet/ti/icssg_classifier.c

...

> +void icssg_class_set_mac_addr(struct regmap *miig_rt, int slice, u8 *mac)

This function appears to be unused.
Perhaps it would be better placed in a later patch?

Or perhaps not, if it makes it hard to split up the patches nicely.
In which case, perhaps the __maybe_unused annotation could be added,
temporarily.

Flagged by clang-16 W=1, and gcc=12 W=1 builds.
Likewise for other issues flagged below regarding
function declarations/definitions.

> +{
> +	regmap_write(miig_rt, offs[slice].mac0, (u32)(mac[0] | mac[1] << 8 |
> +		     mac[2] << 16 | mac[3] << 24));
> +	regmap_write(miig_rt, offs[slice].mac1, (u32)(mac[4] | mac[5] << 8));
> +}
> +
> +/* disable all RX traffic */
> +void icssg_class_disable(struct regmap *miig_rt, int slice)

This function is only used in this file.
Please consider making it static.

...

> +void icssg_class_default(struct regmap *miig_rt, int slice, bool allmulti)

This function also appears to be unused.

...

> +/* required for SAV check */
> +void icssg_ft1_set_mac_addr(struct regmap *miig_rt, int slice, u8 *mac_addr)

This function also appears to be unused.

...

> diff --git a/drivers/net/ethernet/ti/icssg_config.c b/drivers/net/ethernet/ti/icssg_config.c

...

> +void icssg_config_ipg(struct prueth_emac *emac)

This function is also only used in this file.

...

> +static void icssg_init_emac_mode(struct prueth *prueth)
> +{
> +	/* When the device is configured as a bridge and it is being brought
> +	 * back to the emac mode, the host mac address has to be set as 0.
> +	 */
> +	u8 mac[ETH_ALEN] = { 0 };
> +
> +	if (prueth->emacs_initialized)
> +		return;
> +
> +	regmap_update_bits(prueth->miig_rt, FDB_GEN_CFG1,
> +			   SMEM_VLAN_OFFSET_MASK, 0);
> +	regmap_write(prueth->miig_rt, FDB_GEN_CFG2, 0);
> +	/* Clear host MAC address */
> +	icssg_class_set_host_mac_addr(prueth->miig_rt, mac);

icssg_class_set_host_mac_addr() is defined in icssg_classifier.c
but used here in icssg_config.c.

Please consider providing a declaration of this function,
ideally in a .h file.

...

> +int emac_set_port_state(struct prueth_emac *emac,
> +			enum icssg_port_state_cmd cmd)

This function also appears to be unused.

...

> +void icssg_config_set_speed(struct prueth_emac *emac)

Ditto.

...