From: Michel Dänzer <michel.daenzer@xxxxxxx>
PCI GART doesn't support unsnooped access. AGP GART already uses
write-combined CPU mappings.
Signed-off-by: Michel Dänzer <michel.daenzer@xxxxxxx>
---
drivers/gpu/drm/radeon/radeon_ring.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/radeon/radeon_ring.c b/drivers/gpu/drm/radeon/radeon_ring.c
index 71439f0..7cfea7e 100644
--- a/drivers/gpu/drm/radeon/radeon_ring.c
+++ b/drivers/gpu/drm/radeon/radeon_ring.c
@@ -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);
--
2.0.1
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