drm/amd/display: Test GPU memory allocation

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[WHAT]
Add KUnit tests covering GART and VRAM domain selection, size and
alignment forwarding, the buffer object creation failure path,
and the free path for a matching pointer, a non-matching pointer
and an empty allocation list.

[HOW]
Add struct amdgpu_dm_services_kunit_ops, a KUnit-only indirection table
for the buffer object calls that would otherwise need a live TTM
device. Tests install their own table to force an error return and to
count calls, which makes the failure and list handling paths reachable
in the UML test environment. The default table points at the existing
AMDGPU functions, so no test-only wrapper is introduced.

Route the affected calls through services_bo_* wrappers, so the KUnit
build dispatches through the table while non-KUnit builds call the same
functions directly.

Assisted-by: Copilot:Claude-Opus-5
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Hung <alex.hung@amd.com>
Signed-off-by: Ivan Lipski <ivan.lipski@amd.com>
Tested-by: Dan Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

This commit is contained in:

Alex Hung 2026-08-10 11:08:54 -06:00 • committed by Alex Deucher

parent 6bc0d0abb2

commit e3d5618d4d

3 changed files with 268 additions and 5 deletions

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10

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h

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35

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_services.c

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228

drivers/gpu/drm/amd/display/amdgpu_dm/tests/amdgpu_dm_services_test.c

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