On 4/3/26 10:35, Pierre-Eric Pelloux-Prayer wrote:
> It's doing the same thing as amdgpu_fill_buffer(src_data=0), so drop it.
>
> The only caveat is that amdgpu_res_cleared() return value is only valid
> right after allocation.
>
> ---
> v2: introduce new "bool consider_clear_status" arg
> ---
>
> Signed-off-by: Pierre-Eric Pelloux-Prayer <[email protected]>
> ---
> drivers/gpu/drm/amd/amdgpu/amdgpu_object.c | 16 ++--
> drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 88 +++++-----------------
> drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h | 6 +-
> 3 files changed, 32 insertions(+), 78 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
> b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
> index 66c20dd46d12..d0884bbffa75 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
> @@ -717,13 +717,17 @@ int amdgpu_bo_create(struct amdgpu_device *adev,
> bo->tbo.resource->mem_type == TTM_PL_VRAM) {
> struct dma_fence *fence;
>
> - r = amdgpu_ttm_clear_buffer(bo, bo->tbo.base.resv, &fence);
> + r = amdgpu_fill_buffer(amdgpu_ttm_next_clear_entity(adev),
> + bo, 0, NULL, &fence,
> + true,
> AMDGPU_KERNEL_JOB_ID_TTM_CLEAR_BUFFER);
> if (unlikely(r))
> goto fail_unreserve;
>
> - dma_resv_add_fence(bo->tbo.base.resv, fence,
> - DMA_RESV_USAGE_KERNEL);
> - dma_fence_put(fence);
> + if (fence) {
> + dma_resv_add_fence(bo->tbo.base.resv, fence,
> + DMA_RESV_USAGE_KERNEL);
> + dma_fence_put(fence);
> + }
> }
> if (!bp->resv)
> amdgpu_bo_unreserve(bo);
> @@ -1326,8 +1330,8 @@ void amdgpu_bo_release_notify(struct ttm_buffer_object
> *bo)
> goto out;
>
> r = amdgpu_fill_buffer(amdgpu_ttm_next_clear_entity(adev),
> - abo, 0, &bo->base._resv,
> - &fence, AMDGPU_KERNEL_JOB_ID_CLEAR_ON_RELEASE);
> + abo, 0, &bo->base._resv, &fence,
> + false, AMDGPU_KERNEL_JOB_ID_CLEAR_ON_RELEASE);
> if (WARN_ON(r))
> goto out;
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
> b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
> index 648ad344e89c..a3d0998b8cec 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
> @@ -418,7 +418,7 @@ static int amdgpu_move_blit(struct ttm_buffer_object *bo,
> (abo->flags & AMDGPU_GEM_CREATE_VRAM_WIPE_ON_RELEASE)) {
> struct dma_fence *wipe_fence = NULL;
> r = amdgpu_fill_buffer(entity, abo, 0, NULL, &wipe_fence,
> - AMDGPU_KERNEL_JOB_ID_MOVE_BLIT);
> + false, AMDGPU_KERNEL_JOB_ID_MOVE_BLIT);
> if (r) {
> goto error;
> } else if (wipe_fence) {
> @@ -2572,76 +2572,25 @@ static int amdgpu_ttm_fill_mem(struct amdgpu_device
> *adev,
> }
>
> /**
> - * amdgpu_ttm_clear_buffer - clear memory buffers
> - * @bo: amdgpu buffer object
> - * @resv: reservation object
> - * @fence: dma_fence associated with the operation
> + * amdgpu_fill_buffer - fill a buffer with a given value
> + * @entity: entity to use
> + * @bo: the bo to fill
> + * @src_data: the value to set
> + * @resv: fences contained in this reservation will be used as dependencies.
> + * @out_fence: the fence from the last clear will be stored here. It might be
> + * NULL if no job was run.
> + * @dependency: optional input dependency fence.
> + * @consider_clear_status: true if region reported as cleared by
> amdgpu_res_cleared()
> + * are skipped.
> + * @k_job_id: trace id
> *
> - * Clear the memory buffer resource.
> - *
> - * Returns:
> - * 0 for success or a negative error code on failure.
> */
> -int amdgpu_ttm_clear_buffer(struct amdgpu_bo *bo,
> - struct dma_resv *resv,
> - struct dma_fence **fence)
> -{
> - struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
> - struct amdgpu_ttm_buffer_entity *entity;
> - struct amdgpu_res_cursor cursor;
> - u64 addr;
> - int r = 0;
> -
> - if (!adev->mman.buffer_funcs_enabled)
> - return -EINVAL;
> -
> - if (!fence)
> - return -EINVAL;
> - entity = &adev->mman.clear_entities[0];
> - *fence = dma_fence_get_stub();
> -
> - amdgpu_res_first(bo->tbo.resource, 0, amdgpu_bo_size(bo), &cursor);
> -
> - mutex_lock(&entity->lock);
> - while (cursor.remaining) {
> - struct dma_fence *next = NULL;
> - u64 size;
> -
> - if (amdgpu_res_cleared(&cursor)) {
> - amdgpu_res_next(&cursor, cursor.size);
> - continue;
> - }
> -
> - /* Never clear more than 256MiB at once to avoid timeouts */
> - size = min(cursor.size, 256ULL << 20);
> -
> - r = amdgpu_ttm_map_buffer(entity, &bo->tbo, bo->tbo.resource,
> &cursor,
> - 0, false, &size, &addr);
> - if (r)
> - goto err;
> -
> - r = amdgpu_ttm_fill_mem(adev, entity, 0, addr, size, resv,
> - &next, true,
> - AMDGPU_KERNEL_JOB_ID_TTM_CLEAR_BUFFER);
> - if (r)
> - goto err;
> -
> - dma_fence_put(*fence);
> - *fence = next;
> -
> - amdgpu_res_next(&cursor, size);
> - }
> -err:
> - mutex_unlock(&entity->lock);
> -
> - return r;
> -}
> -
> int amdgpu_fill_buffer(struct amdgpu_ttm_buffer_entity *entity,
We should probably rename the function to amdgpu_ttm_clear_buffer() while doing
this.
Apart from that looks good to me.
Regards,
Christian.
> struct amdgpu_bo *bo,
> uint32_t src_data,
> struct dma_resv *resv,
> - struct dma_fence **f,
> + struct dma_fence **out_fence,
> + bool consider_clear_status,
> u64 k_job_id)
> {
> struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
> @@ -2659,6 +2608,11 @@ int amdgpu_fill_buffer(struct amdgpu_ttm_buffer_entity
> *entity,
> struct dma_fence *next;
> uint64_t cur_size, to;
>
> + if (consider_clear_status && amdgpu_res_cleared(&dst)) {
> + amdgpu_res_next(&dst, dst.size);
> + continue;
> + }
> +
> /* Never fill more than 256MiB at once to avoid timeouts */
> cur_size = min(dst.size, 256ULL << 20);
>
> @@ -2680,9 +2634,7 @@ int amdgpu_fill_buffer(struct amdgpu_ttm_buffer_entity
> *entity,
> }
> error:
> mutex_unlock(&entity->lock);
> - if (f)
> - *f = dma_fence_get(fence);
> - dma_fence_put(fence);
> + *out_fence = fence;
> return r;
> }
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h
> b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h
> index a6249252948b..436a3e09a178 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h
> @@ -187,14 +187,12 @@ int amdgpu_copy_buffer(struct amdgpu_device *adev,
> struct dma_resv *resv,
> struct dma_fence **fence,
> bool vm_needs_flush, uint32_t copy_flags);
> -int amdgpu_ttm_clear_buffer(struct amdgpu_bo *bo,
> - struct dma_resv *resv,
> - struct dma_fence **fence);
> int amdgpu_fill_buffer(struct amdgpu_ttm_buffer_entity *entity,
> struct amdgpu_bo *bo,
> uint32_t src_data,
> struct dma_resv *resv,
> - struct dma_fence **f,
> + struct dma_fence **out_fence,
> + bool consider_clear_status,
> u64 k_job_id);
> struct amdgpu_ttm_buffer_entity *amdgpu_ttm_next_clear_entity(struct
> amdgpu_device *adev);
>
