netdev - Re: [PATCH net-next 3/7] net: sched: cls_flower: implement offload tcf_proto

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Message-ID: <20180625204837.GG2161@nanopsycho>
Date:   Mon, 25 Jun 2018 22:48:37 +0200
From:   Jiri Pirko <jiri@...nulli.us>
To:     Jakub Kicinski <jakub.kicinski@...ronome.com>
Cc:     davem@...emloft.net, xiyou.wangcong@...il.com, jhs@...atatu.com,
        gerlitz.or@...il.com, netdev@...r.kernel.org,
        oss-drivers@...ronome.com, John Hurley <john.hurley@...ronome.com>
Subject: Re: [PATCH net-next 3/7] net: sched: cls_flower: implement offload
 tcf_proto_op

Mon, Jun 25, 2018 at 06:34:27AM CEST, jakub.kicinski@...ronome.com wrote:
>From: John Hurley <john.hurley@...ronome.com>
>
>Add the reoffload tcf_proto_op in flower to generate an offload message
>for each filter in the given tcf_proto. Call the specified callback with
>this new offload message. The function only returns an error if the
>callback rejects adding a 'hardware only' rule.
>
>A filter contains a flag to indicate if it is in hardware or not. To
>ensure the reoffload function properly maintains this flag, keep a
>reference counter for the number of instances of the filter that are in
>hardware. Only update the flag when this counter changes from or to 0. Add
>a generic helper function to implement this behaviour.
>
>Signed-off-by: John Hurley <john.hurley@...ronome.com>
>Signed-off-by: Jakub Kicinski <jakub.kicinski@...ronome.com>
>---
> include/net/sch_generic.h | 15 +++++++++++++
> net/sched/cls_flower.c    | 44 +++++++++++++++++++++++++++++++++++++++
> 2 files changed, 59 insertions(+)
>
>diff --git a/include/net/sch_generic.h b/include/net/sch_generic.h
>index 88ed64f60056..c0bd11a928ed 100644
>--- a/include/net/sch_generic.h
>+++ b/include/net/sch_generic.h
>@@ -336,6 +336,21 @@ static inline void tcf_block_offload_dec(struct tcf_block *block, u32 *flags)
> 	block->offloadcnt--;
> }
> 
>+static inline void
>+tc_cls_offload_cnt_update(struct tcf_block *block, u32 *cnt, u32 *flags,

Why u32? This is not uapi or hw facing. Just use "unsigned int".

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