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| author | Thomas Zimmermann <tzimmermann@suse.de> | 2025-11-19 17:26:25 +0300 |
|---|---|---|
| committer | Thomas Zimmermann <tzimmermann@suse.de> | 2025-11-19 17:26:25 +0300 |
| commit | d4f14fa5c6c4d39b5187e1f410d59e38d76f283f (patch) | |
| tree | 8666bd4fcd78149936221a64707c4dc6ca75a9f8 /drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c | |
| parent | 949f1fd2225baefbea2995afa807dba5cbdb6bd3 (diff) | |
| parent | 6a23ae0a96a600d1d12557add110e0bb6e32730c (diff) | |
| download | linux-d4f14fa5c6c4d39b5187e1f410d59e38d76f283f.tar.xz | |
Merge drm/drm-fixes into drm-misc-fixes
Backmerging to get fixes from v6.18-rc6.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c index 8561ad7f6180..ed3bef1edfe4 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c @@ -82,6 +82,18 @@ static int amdgpu_dma_buf_attach(struct dma_buf *dmabuf, struct amdgpu_bo *bo = gem_to_amdgpu_bo(obj); struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev); + /* + * Disable peer-to-peer access for DCC-enabled VRAM surfaces on GFX12+. + * Such buffers cannot be safely accessed over P2P due to device-local + * compression metadata. Fallback to system-memory path instead. + * Device supports GFX12 (GC 12.x or newer) + * BO was created with the AMDGPU_GEM_CREATE_GFX12_DCC flag + * + */ + if (amdgpu_ip_version(adev, GC_HWIP, 0) >= IP_VERSION(12, 0, 0) && + bo->flags & AMDGPU_GEM_CREATE_GFX12_DCC) + attach->peer2peer = false; + if (!amdgpu_dmabuf_is_xgmi_accessible(attach_adev, bo) && pci_p2pdma_distance(adev->pdev, attach->dev, false) < 0) attach->peer2peer = false; |