From: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
To: Murali Karicheri <m-karicheri2@ti.com>
Cc: linux-pci@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, bhelgaas@google.com
Subject: Re: [PATCH] PCI: keystone: add a pci quirk to limit mrrs
Date: Wed, 6 Aug 2014 10:58:37 -0600 [thread overview]
Message-ID: <20140806165837.GC19914@obsidianresearch.com> (raw)
In-Reply-To: <53E25E24.8070506@ti.com>
On Wed, Aug 06, 2014 at 12:56:04PM -0400, Murali Karicheri wrote:
> On 08/06/2014 12:30 PM, Jason Gunthorpe wrote:
> >On Wed, Aug 06, 2014 at 11:18:20AM -0400, Murali Karicheri wrote:
> >>Keystone PCI controller has a limitation that memory read request
> >>size must not exceed 256 bytes. This is a hardware limitation and
> >>add a quirk to force this limit on all downstream devices by
> >>updating mrrs.
> >
> >Does this still work if the tuning is enabled, or does the tuning run
> >after this?
>
> Yes it works with tuning enabled. Tuning happens afterwards. The
> 'limiting mrrs to 256' below is from my patch.
That seems backwards to me...
Jason
next prev parent reply other threads:[~2014-08-06 16:58 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-08-06 15:18 [PATCH] PCI: keystone: add a pci quirk to limit mrrs Murali Karicheri
2014-08-06 16:30 ` Jason Gunthorpe
2014-08-06 16:56 ` Murali Karicheri
2014-08-06 16:58 ` Jason Gunthorpe [this message]
2014-08-06 17:09 ` Murali Karicheri
2014-08-06 17:30 ` Jason Gunthorpe
2014-08-06 19:05 ` Murali Karicheri
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