20 Feb
2012
20 Feb
'12
5:48 p.m.
On Feb 20, 2012 4:31 PM, "Catalin Marinas" catalin.marinas@arm.com wrote:
On 16 February 2012 18:14, viresh kumar viresh.linux@gmail.com wrote:
On Thu, Feb 16, 2012 at 9:48 AM, Catalin Marinas catalin.marinas@arm.com wrote:
The DMA API implementation on ARM takes care of the cache cleaning and invalidating.
I believe that this is the reason why we have cache re-invalidation (we invalidated it in dma_map_*() earlier) in dma_unmap_*() calls for ARMv6+ for DMA_FROM_DEVICE. Am i Correct?
Yes.
But why isn't keeping only the second one sufficient? Why don't we remove it from dma_map_* routines?
-- Viresh