linux-kernel - Re: [PATCH v10 6/7] PCI: document SR-IOV sysfs entries

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Date:	Fri, 6 Mar 2009 14:16:15 -0700
From:	Matthew Wilcox <matthew@....cx>
To:	Yu Zhao <yu.zhao@...el.com>
Cc:	jbarnes@...tuousgeek.org, linux-pci@...r.kernel.org,
	kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
	"Randy.Dunlap" <rdunlap@...otime.net>
Subject: Re: [PATCH v10 6/7] PCI: document SR-IOV sysfs entries


Randy, can you wordsmith this one?

I think I'm starting to understand the difference between physfn and
dep_link, but an example would definitely help.  It may or may not be
appropriate to put it in.

On Fri, Feb 20, 2009 at 02:54:47PM +0800, Yu Zhao wrote:
> Signed-off-by: Yu Zhao <yu.zhao@...el.com>
> ---
>  Documentation/ABI/testing/sysfs-bus-pci |   27 +++++++++++++++++++++++++++
>  1 files changed, 27 insertions(+), 0 deletions(-)
> 
> diff --git a/Documentation/ABI/testing/sysfs-bus-pci b/Documentation/ABI/testing/sysfs-bus-pci
> index ceddcff..84dc100 100644
> --- a/Documentation/ABI/testing/sysfs-bus-pci
> +++ b/Documentation/ABI/testing/sysfs-bus-pci
> @@ -9,3 +9,30 @@ Description:
>  		that some devices may have malformatted data.  If the
>  		underlying VPD has a writable section then the
>  		corresponding section of this file will be writable.
> +
> +What:		/sys/bus/pci/devices/.../virtfn/N
> +Date:		February 2009
> +Contact:	Yu Zhao <yu.zhao@...el.com>
> +Description:
> +		This symbol link appears when hardware supports SR-IOV
> +		capability and Physical Function driver has enabled it.
> +		The symbol link points to the PCI device sysfs entry of
> +		Virtual Function whose index is N (0...MaxVFs-1).
> +
> +What:		/sys/bus/pci/devices/.../virtfn/dep_link
> +Date:		February 2009
> +Contact:	Yu Zhao <yu.zhao@...el.com>
> +Description:
> +		This symbol link appears when hardware supports SR-IOV
> +		capability and Physical Function driver has enabled it,
> +		and this device has vendor specific dependencies with
> +		others. The symbol link points to the PCI device sysfs
> +		entry of Physical Function this device depends on.
> +
> +What:		/sys/bus/pci/devices/.../physfn
> +Date:		February 2009
> +Contact:	Yu Zhao <yu.zhao@...el.com>
> +Description:
> +		This symbol link appears when a device is Virtual Function.
> +		The symbol link points to the PCI device sysfs entry of
> +		Physical Function this device associates with.
> -- 
> 1.6.1
> 
> --
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-- 
Matthew Wilcox				Intel Open Source Technology Centre
"Bill, look, we understand that you're interested in selling us this
operating system, but compare it to ours.  We can't possibly take such
a retrograde step."
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