mirror of https://gitee.com/openkylin/linux.git
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: Michel Dänzer <michel.daenzer@amd.com> Reviewed-by: Christian König <christian.koenig@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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@ -640,7 +640,9 @@ int radeon_ring_init(struct radeon_device *rdev, struct radeon_ring *ring, unsig
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/* Allocate ring buffer */
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/* Allocate ring buffer */
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if (ring->ring_obj == NULL) {
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if (ring->ring_obj == NULL) {
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r = radeon_bo_create(rdev, ring->ring_size, PAGE_SIZE, true,
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r = radeon_bo_create(rdev, ring->ring_size, PAGE_SIZE, true,
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RADEON_GEM_DOMAIN_GTT, 0,
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RADEON_GEM_DOMAIN_GTT,
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(rdev->flags & RADEON_IS_PCIE) ?
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RADEON_GEM_GTT_WC : 0,
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NULL, &ring->ring_obj);
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NULL, &ring->ring_obj);
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if (r) {
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if (r) {
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dev_err(rdev->dev, "(%d) ring create failed\n", r);
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dev_err(rdev->dev, "(%d) ring create failed\n", r);
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