On 06/07/2020 23:43, Chris Wilson wrote:
Looking through the attributes for DMA mappings, it appears that by default dma_map_sg will try and create a kernel accessible map of the page. We never access this, as we either have a struct page already or an iomap, so we can request that the dma mapper does not create one. Without a kernel map in place, one presumes the rest of the memory control attributes do not apply. We also explicitly control the caches around the mappings, so we can ask it not to bother synchronising itself. Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> Cc: Matthew Auld <matthew.auld@xxxxxxxxx>
Reviewed-by: Matthew Auld <matthew.auld@xxxxxxxxx> _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
