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drm/i915/gtt: Control cache domain of dma_map_page() directly

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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>
Link: https://patchwork.freedesktop.org/patch/msgid/20180706122611.4142-2-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson 2018-07-06 13:26:11 +01:00
parent 58174eac15
commit 66daec6b21
1 changed files with 2 additions and 0 deletions
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2
drivers/gpu/drm/i915/i915_gem_gtt.c
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@ -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;