netdev - Re: [PATCHv2 NEXT 1/2] net: add external loopback test in ethtool self test

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Date:	Thu, 30 Jun 2011 14:25:50 +0100
From:	Ben Hutchings <bhutchings@...arflare.com>
To:	amit.salecha@...gic.com
Cc:	davem@...emloft.net, netdev@...r.kernel.org,
	ameen.rahman@...gic.com, sucheta.chakraborty@...gic.com
Subject: Re: [PATCHv2 NEXT 1/2] net: add external loopback test in ethtool
 self test

On Wed, 2011-06-29 at 23:00 -0700, amit.salecha@...gic.com wrote:
> From: Amit Kumar Salecha <amit.salecha@...gic.com>
> 
> External loopback test can be performed by application without any driver
> support on normal Ethernet cards.
> But on CNA devices, where multiple functions share same physical port.
> Here internal loopback test and external loopback test can be initiated by
> multiple functions at same time. To co exist all functions, firmware need
> to regulate what test can be run by which function. So before performing external
> loopback test, command need to send to firmware, which will quiescent other functions.
> 
> User may not want to run external loopback test always. As special cable need to be
> connected for this test.
> So adding explicit flag in ethtool self test, which will specify interface
> to perform external loopback test.
>  ETH_TEST_FL_EXTERNAL_LB: Application set to request external loopback test
>  ETH_TEST_FL_EXTERNAL_LB_DONE: Driver ack if test performed
> 
> Signed-off-by: Amit Kumar Salecha <amit.salecha@...gic.com>
Reviewed-by: Ben Hutchings <bhutchings@...arflare.com>

Ben.

> ---
>  include/linux/ethtool.h |   16 ++++++++++++++--
>  1 files changed, 14 insertions(+), 2 deletions(-)
> 
> diff --git a/include/linux/ethtool.h b/include/linux/ethtool.h
> index 048d0fa..c6e427a 100644
> --- a/include/linux/ethtool.h
> +++ b/include/linux/ethtool.h
> @@ -310,9 +310,21 @@ struct ethtool_sset_info {
>  				   __u32's, etc. */
>  };
>  
> +/**
> + * enum ethtool_test_flags - flags definition of ethtool_test
> + * @ETH_TEST_FL_OFFLINE: if set perform online and offline tests, otherwise
> + *	only online tests.
> + * @ETH_TEST_FL_FAILED: Driver set this flag if test fails.
> + * @ETH_TEST_FL_EXTERNAL_LB: Application request to perform external loopback
> + *	test.
> + * @ETH_TEST_FL_EXTERNAL_LB_DONE: Driver performed the external loopback test
> + */
> +
>  enum ethtool_test_flags {
> -	ETH_TEST_FL_OFFLINE	= (1 << 0),	/* online / offline */
> -	ETH_TEST_FL_FAILED	= (1 << 1),	/* test passed / failed */
> +	ETH_TEST_FL_OFFLINE	= (1 << 0),
> +	ETH_TEST_FL_FAILED	= (1 << 1),
> +	ETH_TEST_FL_EXTERNAL_LB	= (1 << 2),
> +	ETH_TEST_FL_EXTERNAL_LB_DONE	= (1 << 3),
>  };
>  
>  /* for requesting NIC test and getting results*/

-- 
Ben Hutchings, Senior Software 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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