netdev - Re: [PATCH 1/5] cxgb4: Add T4 filter support

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Date:	Thu, 29 Nov 2012 19:51:46 +0000
From:	Ben Hutchings <bhutchings@...arflare.com>
To:	Vipul Pandya <vipul@...lsio.com>
CC:	<linux-rdma@...r.kernel.org>, <netdev@...r.kernel.org>,
	<roland@...estorage.com>, <davem@...emloft.net>,
	<divy@...lsio.com>, <dm@...lsio.com>, <kumaras@...lsio.com>,
	<swise@...ngridcomputing.com>, <abhishek@...lsio.com>
Subject: Re: [PATCH 1/5] cxgb4: Add T4 filter support

On Thu, 2012-11-29 at 20:22 +0530, Vipul Pandya wrote:
> The T4 architecture is capable of filtering ingress packets at line rate
> using the rule in TCAM. If packet hits a rule in the TCAM then it can be either
> dropped or passed to the receive queues based on a rule settings.
> 
> This patch adds framework for managing filters and to use T4's filter
> capabilities. It constructs a Firmware Filter Work Request which writes the
> filter at a specified index to get the work done. It hosts shadow copy of
> ingress filter entry to check field size limitations and save memory in the
> case where the filter table is large.
> 
> Signed-off-by: Vipul Pandya <vipul@...lsio.com>
> ---
>  drivers/net/ethernet/chelsio/cxgb4/cxgb4.h      |  141 +++++++++++
>  drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c |  309 ++++++++++++++++++++++-
>  drivers/net/ethernet/chelsio/cxgb4/cxgb4_uld.h  |    2 +
>  drivers/net/ethernet/chelsio/cxgb4/l2t.c        |   34 +++
>  drivers/net/ethernet/chelsio/cxgb4/l2t.h        |    3 +
>  drivers/net/ethernet/chelsio/cxgb4/t4_hw.c      |   23 ++-
>  drivers/net/ethernet/chelsio/cxgb4/t4_msg.h     |    1 +
>  drivers/net/ethernet/chelsio/cxgb4/t4fw_api.h   |  279 ++++++++++++++++++++
>  8 files changed, 787 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4.h b/drivers/net/ethernet/chelsio/cxgb4/cxgb4.h
> index 378988b..8cfc1ba 100644
> --- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4.h
> +++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4.h
> @@ -545,6 +545,139 @@ struct adapter {
>  	spinlock_t stats_lock;
>  };
>  
> +/**
[...]

'/**' introduces a kernel-doc comment; please don't use it for any
comments not in that format.

Ben.

-- 
Ben Hutchings, Staff Engineer, Solarflare
Not speaking for my employer; that's the marketing department's job.
They asked us to note that Solarflare product names are trademarked.

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