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| author | Christian König <christian.koenig@amd.com> | 2018-03-23 18:33:57 +0300 |
|---|---|---|
| committer | Christian König <christian.koenig@amd.com> | 2020-04-01 10:02:45 +0300 |
| commit | 48262cd9499c9cd0faf687ef9427cc0b0a3b0189 (patch) | |
| tree | 614c274e3d153620b8be71a4a1894edd864a5647 /drivers | |
| parent | 57b7b62f5a7436fbe5c190c5c8960121d0b9041d (diff) | |
| download | linux-48262cd9499c9cd0faf687ef9427cc0b0a3b0189.tar.xz | |
drm/amdgpu: add checks if DMA-buf P2P is supported
Check if we can do peer2peer on the PCIe bus.
Signed-off-by: Christian König <christian.koenig@amd.com>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Acked-by: Sumit Semwal <sumit.semwal@linaro.org>
Link: https://patchwork.freedesktop.org/patch/359294
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c | 4 |
1 files changed, 4 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 aef12ee2f1e3..bbf67800c8a6 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c @@ -38,6 +38,7 @@ #include <drm/amdgpu_drm.h> #include <linux/dma-buf.h> #include <linux/dma-fence-array.h> +#include <linux/pci-p2pdma.h> /** * amdgpu_gem_prime_vmap - &dma_buf_ops.vmap implementation @@ -179,6 +180,9 @@ static int amdgpu_dma_buf_attach(struct dma_buf *dmabuf, struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev); int r; + if (pci_p2pdma_distance_many(adev->pdev, &attach->dev, 1, true) < 0) + attach->peer2peer = false; + if (attach->dev->driver == adev->dev->driver) return 0; |