[lkml]   [2011]   [Jul]   [9]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCH 2/6] ARM: move ARCH_HAS_DMA_SET_COHERENT_MASK into memory.h
On Sat, Jul 09, 2011 at 09:33:06AM -0500, Rob Herring wrote:
> I noticed this is going to have conflicts with your ARM_DMA_ZONE_SIZE
> series. Can you add this into your series? This still presents another
> issue to solve for single kernel binary, but hopefully the dma mapping
> work will help.

That's a different problem - its about limiting the maximum DMA mask
which can be set, so that memory is sourced from the right place
even for drivers which use 32-bit masks.

It's needed to ensure that dma_set_coherent_mask() can be overridden.
One solution to it would be to ensure that we always define
ARCH_HAS_DMA_SET_COHERENT_MASK, and handle the differences internally,
which is something I've been thinking about adding to my DMA bounce
series of patches.

 \ /
  Last update: 2011-07-09 17:01    [W:0.043 / U:6.348 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site