drm/amdkfd: Add domain parameter to kernel BO mapping function

This change allows amdgpu_amdkfd_gpuvm_map_bo_to_kernel() to pin buffers
in either GTT or VRAM based on caller specification, providing flexibility
for different memory placement requirements across various kernel buffers.

The domain parameter accepts AMDGPU_GEM_DOMAIN_GTT, AMDGPU_GEM_DOMAIN_VRAM,
or their combination (GTT|VRAM) to let amdgpu_bo_pin() choose the optimal
placement via amdgpu_bo_get_preferred_domain(). This flexible validation
allows callers to specify their preference while delegating final placement
decisions to the driver when appropriate.

CPU visibility is automatically enforced by amdgpu_bo_pin() regardless of
the domain parameter (see amdgpu_bo_pin() line 975-976 which sets
AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED for kernel mappings).

-v3: update amdgpu_amdkfd_gpuvm_map_bo_to_kernel description

Signed-off-by: James Zhu <James.Zhu@amd.com>
Reviewed-by: Vladimir Indic <vladimir.indic@amd.com>
Reviewed-by: Philip Yang <philip.yang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

0 files changed, 0 insertions, 0 deletions