Commit 8e29057e authored by Ramesh Errabolu's avatar Ramesh Errabolu Committed by Alex Deucher
Browse files

drm/amdgpu: Inform if PCIe based P2P links are not available 



Raise an info message in kernel log if PCIe root complex
determines that a AMD GPU device D<i> cannot have P2P
communication with another AMD GPU device D<j>

Signed-off-by: default avatarRamesh Errabolu <Ramesh.Errabolu@amd.com>
Reviewed-by: default avatarFelix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 69e9a9e6

drivers/gpu/drm/amd/amdgpu/amdgpu_device.c

+3 −0
Original line number Diff line number Diff line
@@ -6200,6 +6200,9 @@ bool amdgpu_device_is_peer_accessible(struct amdgpu_device *adev, 
	bool p2p_access =

		!adev->gmc.xgmi.connected_to_cpu &&

		!(pci_p2pdma_distance(adev->pdev, peer_adev->dev, false) < 0);

	if (!p2p_access)

		dev_info(adev->dev, "PCIe P2P access from peer device %s is not supported by the chipset\n",

			pci_name(peer_adev->pdev));



	bool is_large_bar = adev->gmc.visible_vram_size &&

		adev->gmc.real_vram_size == adev->gmc.visible_vram_size;