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| author | saturneric <[email protected]> | 2025-12-02 21:44:00 +0000 |
|---|---|---|
| committer | saturneric <[email protected]> | 2025-12-02 21:44:00 +0000 |
| commit | aa766e96efd6b62fd4dc7750134624f2c633cc55 (patch) | |
| tree | 06078a9d8cbb6227f541e18545aa68f082d86242 /drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c | |
| parent | Merge tag 'v6.17.8' into linux-6.17.y (diff) | |
| parent | Linux 6.17.10 (diff) | |
| download | kernel-linux-6.17.y.tar.gz kernel-linux-6.17.y.zip | |
Merge tag 'v6.17.10' into linux-6.17.ylinux-6.17.y
This is the 6.17.10 stable release
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 ce27cb5bb05e..8e0ca4114ee9 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; |