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Commit 1490434f authored by Michel Dänzer's avatar Michel Dänzer Committed by Alex Deucher
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drm/radeon: Use write-combined CPU mappings of ring buffers with PCIe 



PCI GART doesn't support unsnooped access. AGP GART already uses
write-combined CPU mappings.

Signed-off-by: default avatarMichel Dänzer <michel.daenzer@amd.com>
Reviewed-by: default avatarChristian König <christian.koenig@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 5dc35532

drivers/gpu/drm/radeon/radeon_ring.c

+3 −1
Original line number Diff line number Diff line
@@ -640,7 +640,9 @@ int radeon_ring_init(struct radeon_device *rdev, struct radeon_ring *ring, unsig 
	/* Allocate ring buffer */

	if (ring->ring_obj == NULL) {

		r = radeon_bo_create(rdev, ring->ring_size, PAGE_SIZE, true,

				     RADEON_GEM_DOMAIN_GTT, 0,

				     RADEON_GEM_DOMAIN_GTT,

				     (rdev->flags & RADEON_IS_PCIE) ?

				     RADEON_GEM_GTT_WC : 0,

				     NULL, &ring->ring_obj);

		if (r) {

			dev_err(rdev->dev, "(%d) ring create failed\n", r);