* Keith Packard <[EMAIL PROTECTED]> wrote: > On Sun, 2008-10-19 at 00:32 +0200, Ingo Molnar wrote: > > > the _real_ remapping in a graphics aperture happens on the GPU level > > anyway, you manage an in-RAM GPU pagetable that just works like an > > IOMMU, correct? > > Yes, a one-level linear MMU which uses BIOS-reserved memory. > > So, at least for a prototype, on 64-bit we can just use ioremap_wc and > hold the mapping while the driver is open? Is there any huge benefit > to using the kernel mapping?
correct. There's no benefit to using the kernel mapping - and we can add 2MB pages support to ioremap just fine and then you'll benefit from it automatically. Ingo ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ -- _______________________________________________ Dri-devel mailing list Dri-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/dri-devel