[v3] Add lspci support for Enhanced Allocation Capability.

From 484344fef7e5c96c54576586ce81e6209a48b92c Mon Sep 17 00:00:00 2001
From: "Sean O. Stalley" <sean.stalley@intel.com>
Date: Wed, 16 Dec 2015 10:31:51 -0800
Subject: [PATCH 1/1] Support region sizes that are not power-of-2

Enhanced Allocation allows PCI devices to reserve regions with DWORD
granularity. Make sure lspci doesn't tuncate least significant bits
of the region size.

ex: a 2000 byte region should display [size=2000] instead of [size=1K]
Signed-off-by: Sean O. Stalley <sean.stalley@intel.com>
---

Hi David,

Here are some additional changes I think we should make to lspci in order to support EA.

The truncation problem was a simple fix.

Regions described by EA are being mislabeled as [virtual].
I spent some time today trying to write a patch that fixes this issue.
I couldn't come up with a clean solution, so I just added a comment.

Let me know if you have any questions.

Thanks,
Sean

 lspci.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

Sean,

I think this is a good addition.

I don't plan on merging it into my patch, but instead think it should be 
applied separately

Thanks,
David Daney


On 12/16/2015 04:55 PM, Sean O. Stalley wrote:
>  From 484344fef7e5c96c54576586ce81e6209a48b92c Mon Sep 17 00:00:00 2001
> From: "Sean O. Stalley" <sean.stalley@intel.com>
> Date: Wed, 16 Dec 2015 10:31:51 -0800
> Subject: [PATCH 1/1] Support region sizes that are not power-of-2
>
> Enhanced Allocation allows PCI devices to reserve regions with DWORD
> granularity. Make sure lspci doesn't tuncate least significant bits
> of the region size.
>
> ex: a 2000 byte region should display [size=2000] instead of [size=1K]
> Signed-off-by: Sean O. Stalley <sean.stalley@intel.com>
> ---
>
> Hi David,
>
> Here are some additional changes I think we should make to lspci in order to support EA.
>
> The truncation problem was a simple fix.
>
> Regions described by EA are being mislabeled as [virtual].
> I spent some time today trying to write a patch that fixes this issue.
> I couldn't come up with a clean solution, so I just added a comment.
>
> Let me know if you have any questions.
>
> Thanks,
> Sean
>
>   lspci.c | 4 ++--
>   1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/lspci.c b/lspci.c
> index fe7b7fe..d483f3a 100644
> --- a/lspci.c
> +++ b/lspci.c
> @@ -336,7 +336,7 @@ show_size(pciaddr_t x)
>     if (!x)
>       return;
>     for (i = 0; i < (sizeof(suffix) / sizeof(*suffix) - 1); i++) {
> -    if (x < 1024)
> +    if (x % 1024)
>         break;
>       x /= 1024;
>     }
> @@ -366,7 +366,7 @@ show_bases(struct device *d, int cnt)
>   	putchar('\t');
>         if (pos && !flg)			/* Reported by the OS, but not by the device */
>   	{
> -	  printf("[virtual] ");
> +	  printf("[virtual] ");		/* could also be enhanced */
>   	  flg = pos;
>   	  virtual = 1;
>   	}
>

--
To unsubscribe from this list: send the line "unsubscribe linux-pci" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html