Am 04.11.22 um 16:40 schrieb Felix Kuehling:
When importing dmabufs from other amdgpu devices, inherit the coherence
flags from the exported BO. This ensures correct MTYPEs in the GPU PTEs
for multi-GPU mappings of shared BOs.
Fixes: 763fbebb20e1 ("drm/amdgpu: Set MTYPE in PTE based on BO flags")
Tested-by: Gang Ba <Gang.Ba@xxxxxxx>
Signed-off-by: Felix Kuehling <Felix.Kuehling@xxxxxxx>
Acked-by: Christian König <christian.koenig@xxxxxxx>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c
index 7bd8e33b14be..271e30e34d93 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c
@@ -328,7 +328,9 @@ amdgpu_dma_buf_create_obj(struct drm_device *dev, struct dma_buf *dma_buf)
if (dma_buf->ops == &amdgpu_dmabuf_ops) {
struct amdgpu_bo *other = gem_to_amdgpu_bo(dma_buf->priv);
- flags |= other->flags & AMDGPU_GEM_CREATE_CPU_GTT_USWC;
+ flags |= other->flags & (AMDGPU_GEM_CREATE_CPU_GTT_USWC |
+ AMDGPU_GEM_CREATE_COHERENT |
+ AMDGPU_GEM_CREATE_UNCACHED);
}
ret = amdgpu_gem_object_create(adev, dma_buf->size, PAGE_SIZE,
