drm/gem: Add callback for when handle count goes to 0

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Add an optional callback for driver-specific cleanup when the GEM
handle of an object is freed. This will be used by AMDGPU to enable
freeing of memory exported to other nodes in a UALink pod once all
user mode references are gone.

The callback is called outside the object_name_lock and before
releasing the reference count on the GEM object

Suggested-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Mukul Joshi <mukul.joshi@amd.com>
Reviewed-by: Felix Kuehling <felix.kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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Mukul Joshi 2026-01-28 14:31:18 -05:00 • committed by Alex Deucher

parent 39cfb3fe53

commit b67d2d039f

3 changed files with 24 additions and 1 deletions

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9

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

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5

drivers/gpu/drm/drm_gem.c

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11

include/drm/drm_gem.h

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