diff options
| author | John Brooks <john@fastquake.com> | 2017-06-27 22:33:17 -0400 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2017-07-14 11:06:32 -0400 |
| commit | 218b5dcde4d30e071eec4201a36af665ccfa7e1c (patch) | |
| tree | 0889785bfbeed0e0342c41feb9852e9c9bc6785d /drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | |
| parent | f9321cc4408bd90bb0adcd929c04322aaf6afdcc (diff) | |
drm/amdgpu: Add vis_vramlimit module parameter
Allow specifying a limit on visible VRAM via a module parameter. This is
helpful for testing performance under visible VRAM pressure.
v2: Add cast to 64-bit (Christian König)
Signed-off-by: John Brooks <john@fastquake.com>
Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Michel Dänzer <michel.daenzer@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c index b5420b20c2f5..e238084b7142 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c @@ -1099,6 +1099,7 @@ int amdgpu_ttm_init(struct amdgpu_device *adev) { uint64_t gtt_size; int r; + u64 vis_vram_limit; r = amdgpu_ttm_global_init(adev); if (r) { @@ -1122,6 +1123,13 @@ int amdgpu_ttm_init(struct amdgpu_device *adev) DRM_ERROR("Failed initializing VRAM heap.\n"); return r; } + + /* Reduce size of CPU-visible VRAM if requested */ + vis_vram_limit = (u64)amdgpu_vis_vram_limit * 1024 * 1024; + if (amdgpu_vis_vram_limit > 0 && + vis_vram_limit <= adev->mc.visible_vram_size) + adev->mc.visible_vram_size = vis_vram_limit; + /* Change the size here instead of the init above so only lpfn is affected */ amdgpu_ttm_set_active_vram_size(adev, adev->mc.visible_vram_size); |