[PATCH] agp/intel: Fix dma mask for Sandybridge
Eric Anholt
eric at anholt.net
Mon Aug 23 07:02:16 PDT 2010
On Mon, 23 Aug 2010 14:48:54 +0800, Zhenyu Wang <zhenyuw at linux.intel.com> wrote:
> On 2010.08.23 08:31:42 +0200, Takashi Iwai wrote:
> > > bit 31 bit 11 bit 4 bit 0
> > > |<-physical addr 31:12->|<-physical addr 39:32->|<-cache ctl 3:1->|valid|
> >
> > Then I really don't understand why it works.
> > You shift 28bit and mask with 0xff. Obviously it overwrite bits 0:3
> > with original 28:31 bits. Masking 0xff0 fixes the issue.
> >
>
> ah, sorry, my stupid. Thanks for catching this!
>
> Subject: [PATCH] agp/intel: fix physical address mask bits for sandybridge
>
> It should shift bit 39-32 into pte's bit 11-4.
Applied. Thanks!
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 197 bytes
Desc: not available
URL: <http://lists.freedesktop.org/archives/dri-devel/attachments/20100823/9cce1ca1/attachment.pgp>
More information about the dri-devel
mailing list