From 8e29057eecb83e45898a31285ff8b82dff188dd1 Mon Sep 17 00:00:00 2001 From: Ramesh Errabolu Date: Tue, 5 Nov 2024 18:50:02 -0600 Subject: [PATCH 0786/5403] 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 cannot have P2P communication with another AMD GPU device D Signed-off-by: Ramesh Errabolu Reviewed-by: Felix Kuehling Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c index 38a17571da75..a72c90da3d1d 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c @@ -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; -- 2.54.0