netdev - Re: [PATCH net-next] net: mvpp2: cls: Add Classification offload support

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Date:   Fri, 19 Apr 2019 15:09:50 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     maxime.chevallier@...tlin.com
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        antoine.tenart@...tlin.com, thomas.petazzoni@...tlin.com,
        gregory.clement@...tlin.com, miquel.raynal@...tlin.com,
        nadavh@...vell.com, stefanc@...vell.com, mw@...ihalf.com,
        linux@...linux.org.uk, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH net-next] net: mvpp2: cls: Add Classification offload
 support

From: Maxime Chevallier <maxime.chevallier@...tlin.com>
Date: Fri, 19 Apr 2019 15:30:27 +0200

> +/* Internal represention of a Flow Steering rule */
> +struct mvpp2_rfs_rule {
> +	/* Rule location inside the flow*/
> +	int loc;
> +
> +	/* Flow type, such as TCP_V4_FLOW, IP6_FLOW, etc. */
> +	int flow_type;
> +
> +	/* The lookup type used by this flow. This allows the classification
> +	 * engines to differentiate between entries that match the same
> +	 * parameters
> +	 */
> +	int lu_type;
> +
> +	/* Index of the entry handling this rule in the flow table */
> +	int flt_index;
> +
> +	/* Index of the C2 TCAM entry handling this rule */
> +	int c2_index;

On 64-bit there will be a 32-bit hole here.  Why not put hek_fields
and engine here?