amdgpu_vram_mgr_block_size
region->size = amdgpu_vram_mgr_block_size(block);
cur->size = min(amdgpu_vram_mgr_block_size(block), cur->remaining);
while (start >= amdgpu_vram_mgr_block_size(block)) {
start -= amdgpu_vram_mgr_block_size(block);
cur->size = min(amdgpu_vram_mgr_block_size(block) - start, size);
u64 end = start + amdgpu_vram_mgr_block_size(block);
size = amdgpu_vram_mgr_block_size(block);
amdgpu_vram_mgr_block_size(block);
size = amdgpu_vram_mgr_block_size(block);
(amdgpu_vram_mgr_block_size(block) >> PAGE_SHIFT);
(amdgpu_vram_mgr_block_size(block) >> PAGE_SHIFT);
size += amdgpu_vram_mgr_block_size(block);