drm/amdgpu: Resolve VM through DRM PASID ownership

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Allocate DRM PASIDs with fpriv and resolve VM lookup users through:

	PASID -> fpriv -> VM

This preserves the root BO reference and revalidation flow in
amdgpu_vm_lock_by_pasid().

The obsolete per-device vm_manager.pasids mapping is removed by the
following patch in this series.

v6:
- Allocate and publish the DRM PASID after amdgpu_vm_init() completes.
- Assign the allocated PASID to vm->pasid in the DRM open path.
- Unpublish PASID ownership before tearing down the VM in both the
  open-failure and normal file-close paths.

v5:
- Delay DRM PASID allocation until after amdgpu_vm_init() completes.

v4:
- Allocate DRM PASIDs with fpriv directly.
- Squash ownership registration and PASID lookup conversion.

Cc: Alex Deucher <alexander.deucher@amd.com>
Suggested-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Srinivasan Shanmugam <srinivasan.shanmugam@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

This commit is contained in:

Srinivasan Shanmugam 2026-07-19 21:39:02 +05:30 • committed by Alex Deucher

parent 636df65409

commit b0ae60ea3f

2 changed files with 44 additions and 28 deletions

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32

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

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40

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

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