drm/amdgpu: add VRAM manager v2
Split VRAM allocations into 4MB blocks.
v2: fix typo in comment, some suggested cleanups
v3: document how to disable the feature, fix rebase issue
Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Edward O'Callaghan <funfunctor@folklore1984.net>
Tested-by: Mike Lothian <mike@fireburn.co.uk>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index 246bbd1..9df66d1 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -1052,6 +1052,13 @@ static void amdgpu_check_arguments(struct amdgpu_device *adev)
amdgpu_vm_block_size);
amdgpu_vm_block_size = 9;
}
+
+ if ((amdgpu_vram_page_split != -1 && amdgpu_vram_page_split < 16) ||
+ !amdgpu_check_pot_argument(amdgpu_vram_page_split)) {
+ dev_warn(adev->dev, "invalid VRAM page split (%d)\n",
+ amdgpu_vram_page_split);
+ amdgpu_vram_page_split = 1024;
+ }
}
/**