| Message ID | 20180706122611.4142-2-chris@chris-wilson.co.uk (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On 6 July 2018 at 13:26, Chris Wilson <chris@chris-wilson.co.uk> wrote: > We already maually control the CPU cache for our page table directories, > so we can tell the dma mapper to skip doing it as well. > > Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> > Cc: Matthew Auld <matthew.auld@intel.com> Reviewed-by: Matthew Auld <matthew.auld@intel.com>
diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c index ee881998a7d3..3b7a1437bfbf 100644 --- a/drivers/gpu/drm/i915/i915_gem_gtt.c +++ b/drivers/gpu/drm/i915/i915_gem_gtt.c @@ -564,6 +564,7 @@ static int __setup_page_dma(struct i915_address_space *vm, p->daddr = dma_map_page_attrs(vm->dma, p->page, 0, PAGE_SIZE, PCI_DMA_BIDIRECTIONAL, + DMA_ATTR_SKIP_CPU_SYNC | DMA_ATTR_NO_WARN); if (unlikely(dma_mapping_error(vm->dma, p->daddr))) { vm_free_page(vm, p->page); @@ -648,6 +649,7 @@ setup_scratch_page(struct i915_address_space *vm, gfp_t gfp) addr = dma_map_page_attrs(vm->dma, page, 0, size, PCI_DMA_BIDIRECTIONAL, + DMA_ATTR_SKIP_CPU_SYNC | DMA_ATTR_NO_WARN); if (unlikely(dma_mapping_error(vm->dma, addr))) goto free_page;
We already maually control the CPU cache for our page table directories, so we can tell the dma mapper to skip doing it as well. Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Matthew Auld <matthew.auld@intel.com> --- drivers/gpu/drm/i915/i915_gem_gtt.c | 2 ++ 1 file changed, 2 insertions(+)