drm/amdgpu: skip xcp drm device allocation when out of drm resource

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Return 0 when drm device alloc failed with -ENOSPC in
order to  allow amdgpu drive loading. But the xcp without
drm device node assigned won't be visiable in user space.
This helps amdgpu driver loading on system which has more
than 64 nodes, the current limitation.

The proposal to add more drm nodes is discussed in public,
which will support up to 2^20 nodes totally.
kernel drm:
https://lore.kernel.org/lkml/20230724211428.3831636-1-michal.winiarski@intel.com/T/
libdrm:
https://gitlab.freedesktop.org/mesa/drm/-/merge_requests/305

Signed-off-by: James Zhu <James.Zhu@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

This commit is contained in:

James Zhu 2023-08-09 16:45:04 -04:00 • committed by Alex Deucher

parent 1d02ae4ebd

commit 400a39f1ec

2 changed files with 20 additions and 2 deletions

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13

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

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9

drivers/gpu/drm/amd/amdkfd/kfd_topology.c

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