[PATCH v2 1/4] common/sfc_efx/base: discover NIC partitioning mode

[Andrew Rybchenko]

On 6/22/23 06:47, Denis Pryazhennikov wrote:
> From: Sandilya Bhagi <sbhagi at solarflare.com>
> 
> NIC Partitioning mode in SFC devices means multiple PFs
> per network port. When NIC Partitioning is configured,
> apart from the privileged adapter(s) the other
> unprivileged adapter(s) will share the same physical port.
> Determining NIC Partitioning mode is required to take
> necessary action(s) for unprivileged adapter to work seamlessly.
> BNIC Partitioning is determined using heuristic approach.
> If the physical ports are shared between PFs then either
> NIC Partitioning or SR-IOV is in use.
> 
> Signed-off-by: Sandilya Bhagi <sbhagi at solarflare.com>
> Signed-off-by: Denis Pryazhennikov <denis.pryazhennikov at arknetworks.am>
> Reviewed-by: Andy Moreton <amoreton at xilinx.com>

Overall LGMT with few style notes:

Acked-by: Andrew Rybchenko <andrew.rybchenko at oktetlabs.ru>

[snip]

> +#define CAP_PFS_TO_PORTS(_n)	\
> +	(MC_CMD_GET_CAPABILITIES_V2_OUT_PFS_TO_PORTS_ASSIGNMENT_ ## _n)
> +
> +	encp->enc_port_usage = EFX_PORT_USAGE_UNKNOWN;
> +
> +	if (req.emr_out_length_used >= MC_CMD_GET_CAPABILITIES_V2_OUT_LEN) {
> +		/* PFs to ports assignment */
> +		uint8_t pfs_to_ports[CAP_PFS_TO_PORTS(NUM)];
> +
> +		EFX_STATIC_ASSERT((CAP_PFS_TO_PORTS(NUM) * CAP_PFS_TO_PORTS(LEN)) ==
> +				  EFX_ARRAY_SIZE(pfs_to_ports));

As far as I remember libefx style, it should be 4 spaces indent above
relative to mail line.

> +
> +		memcpy(pfs_to_ports, MCDI_OUT(req, efx_byte_t, CAP_PFS_TO_PORTS(OFST)),
> +		       EFX_ARRAY_SIZE(pfs_to_ports));

same here, 4 spaces indent

> +
> +		rc = ef10_nic_get_physical_port_usage(enp, pfs_to_ports,
> +						      EFX_ARRAY_SIZE(pfs_to_ports),
> +						      &encp->enc_port_usage);

same here, 4 spaces indent

> +		if (rc != 0) {
> +			/* PF to port mapping lookup failed */
> +			encp->enc_port_usage = EFX_PORT_USAGE_UNKNOWN;
> +		}
> +	}
> +#undef  CAP_PFS_TO_PORTS
> +
>   	/*
>   	 * Check if firmware reports the VI window mode.
>   	 * Medford2 has a variable VI window size (8K, 16K or 64K).

[snip]