drm/amdgpu: dGPU mode placement support memory partition

dGPU mode uses VRAM manager to validate bo, amdgpu bo placement use the
mem_id  to get the allocation range first, last page frame number
from xcp manager, pass to drm buddy allocator as the allowed range.
Signed-off-by: Philip Yang <Philip.Yang@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -132,13 +132,18 @@ void amdgpu_bo_placement_from_domain(struct amdgpu_bo *abo, u32 domain)
 	if (domain & AMDGPU_GEM_DOMAIN_VRAM) {
 		unsigned int visible_pfn = adev->gmc.visible_vram_size >> PAGE_SHIFT;
 
-		places[c].fpfn = 0;
-		places[c].lpfn = 0;
+		if (adev->gmc.mem_partitions && abo->mem_id >= 0) {
+			places[c].fpfn = adev->gmc.mem_partitions[abo->mem_id].range.fpfn;
+			places[c].lpfn = adev->gmc.mem_partitions[abo->mem_id].range.lpfn;
+		} else {
+			places[c].fpfn = 0;
+			places[c].lpfn = 0;
+		}
 		places[c].mem_type = TTM_PL_VRAM;
 		places[c].flags = 0;
 
 		if (flags & AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED)
-			places[c].lpfn = visible_pfn;
+			places[c].lpfn = min_not_zero(places[c].lpfn, visible_pfn);
 		else if (adev->gmc.real_vram_size != adev->gmc.visible_vram_size)
 			places[c].flags |= TTM_PL_FLAG_TOPDOWN;