diff options
| author | Yong Zhao <yong.zhao@amd.com> | 2017-09-15 18:20:37 -0400 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2017-09-26 15:14:21 -0400 |
| commit | 7bdc53f925af085ffa0580f10489f82b36cc2f1c (patch) | |
| tree | 8b760f772a29969ecce509371d55e22111a19627 /drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | |
| parent | dfe5c2b76b2a32cd37283809737e55f9208f8346 (diff) | |
drm/amdgpu: Fix a bug in amdgpu_fill_buffer()
When max_bytes is not 8 bytes aligned and bo size is larger than
max_bytes, the last 8 bytes in a ttm node may be left unchanged.
For example, on pre SDMA 4.0, max_bytes = 0x1fffff, and the bo size
is 0x200000, the problem will happen.
In order to fix the problem, we separately store the max nums of
PTEs/PDEs a single operation can set in amdgpu_vm_pte_funcs
structure, rather than inferring it from bytes limit of SDMA
constant fill, i.e. fill_max_bytes.
Together with the fix, we replace the hard code value "10" in
amdgpu_vm_bo_update_mapping() with the corresponding values from
structure amdgpu_vm_pte_funcs.
Signed-off-by: Yong Zhao <yong.zhao@amd.com>
Reviewed-by: Christian König <christian.koenig@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, 4 insertions, 4 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c index ce435dbbb398..1086f039d8e3 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c @@ -1527,8 +1527,8 @@ int amdgpu_fill_buffer(struct amdgpu_bo *bo, struct dma_fence **fence) { struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev); - /* max_bytes applies to SDMA_OP_PTEPDE as well as SDMA_OP_CONST_FILL*/ - uint32_t max_bytes = adev->mman.buffer_funcs->fill_max_bytes; + uint32_t max_bytes = 8 * + adev->vm_manager.vm_pte_funcs->set_max_nums_pte_pde; struct amdgpu_ring *ring = adev->mman.buffer_funcs_ring; struct drm_mm_node *mm_node; @@ -1560,8 +1560,8 @@ int amdgpu_fill_buffer(struct amdgpu_bo *bo, ++mm_node; } - /* 10 double words for each SDMA_OP_PTEPDE cmd */ - num_dw = num_loops * 10; + /* num of dwords for each SDMA_OP_PTEPDE cmd */ + num_dw = num_loops * adev->vm_manager.vm_pte_funcs->set_pte_pde_num_dw; /* for IB padding */ num_dw += 64; |