On 16.09.25 09:08, Pierre-Eric Pelloux-Prayer wrote:
> amdgpu_ttm_copy_mem_to_mem has a single caller, make sure the out
> fence is non-NULL to simplify the code.
> Since none of the pointers should be NULL, we can enable
> __attribute__((nonnull))__.
>
> While at it make the function static since it's only used from
> amdgpuu_ttm.c.
>
> Signed-off-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-pra...@amd.com>
> ---
> drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 17 ++++++++---------
> drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h | 6 ------
> 2 files changed, 8 insertions(+), 15 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
> b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
> index 27ab4e754b2a..70b817b5578d 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
> @@ -284,12 +284,13 @@ static int amdgpu_ttm_map_buffer(struct
> ttm_buffer_object *bo,
> * move and different for a BO to BO copy.
> *
> */
> -int amdgpu_ttm_copy_mem_to_mem(struct amdgpu_device *adev,
> - const struct amdgpu_copy_mem *src,
> - const struct amdgpu_copy_mem *dst,
> - uint64_t size, bool tmz,
> - struct dma_resv *resv,
> - struct dma_fence **f)
> +__attribute__((nonnull))
That looks fishy.
> +static int amdgpu_ttm_copy_mem_to_mem(struct amdgpu_device *adev,
> + const struct amdgpu_copy_mem *src,
> + const struct amdgpu_copy_mem *dst,
> + uint64_t size, bool tmz,
> + struct dma_resv *resv,
> + struct dma_fence **f)
I'm not an expert for those, but looking at other examples that should be here
and look something like:
__attribute__((nonnull(7)))
But I think for this case here it is also not a must have to have that.
Regards,
Christian.
> {
> struct amdgpu_ring *ring = adev->mman.buffer_funcs_ring;
> struct amdgpu_res_cursor src_mm, dst_mm;
> @@ -363,9 +364,7 @@ int amdgpu_ttm_copy_mem_to_mem(struct amdgpu_device *adev,
> }
> error:
> mutex_unlock(&adev->mman.gtt_window_lock);
> - if (f)
> - *f = dma_fence_get(fence);
> - dma_fence_put(fence);
> + *f = fence;
> return r;
> }
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h
> b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h
> index bb17987f0447..07ae2853c77c 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h
> @@ -170,12 +170,6 @@ int amdgpu_copy_buffer(struct amdgpu_ring *ring,
> uint64_t src_offset,
> struct dma_resv *resv,
> struct dma_fence **fence, bool direct_submit,
> bool vm_needs_flush, uint32_t copy_flags);
> -int amdgpu_ttm_copy_mem_to_mem(struct amdgpu_device *adev,
> - const struct amdgpu_copy_mem *src,
> - const struct amdgpu_copy_mem *dst,
> - uint64_t size, bool tmz,
> - struct dma_resv *resv,
> - struct dma_fence **f);
> int amdgpu_ttm_clear_buffer(struct amdgpu_bo *bo,
> struct dma_resv *resv,
> struct dma_fence **fence);
