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Message-ID: <fdb6f760-a823-4c3e-b784-9f872e69b7e9@amd.com>
Date: Mon, 17 Nov 2025 09:43:25 +0100
From: Christian König <christian.koenig@....com>
To: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@....com>,
Alex Deucher <alexander.deucher@....com>, David Airlie <airlied@...il.com>,
Simona Vetter <simona@...ll.ch>, Sumit Semwal <sumit.semwal@...aro.org>
Cc: amd-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
linux-kernel@...r.kernel.org, linux-media@...r.kernel.org,
linaro-mm-sig@...ts.linaro.org
Subject: Re: [PATCH v2 09/20] drm/amdgpu: pass optional dependency to
amdgpu_fill_buffer
On 11/13/25 17:05, Pierre-Eric Pelloux-Prayer wrote:
> In case the fill job depends on a previous fence, the caller can
> now pass it to make sure the ordering of the jobs is correct.
I don't think you need that patch any more.
>
> Signed-off-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@....com>
> ---
> drivers/gpu/drm/amd/amdgpu/amdgpu_object.c | 2 +-
> drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 22 ++++++++++++++++------
> drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h | 1 +
> 3 files changed, 18 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
> index e7b2cae031b3..be3532134e46 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
> @@ -1322,7 +1322,7 @@ void amdgpu_bo_release_notify(struct ttm_buffer_object *bo)
> goto out;
>
> r = amdgpu_fill_buffer(&adev->mman.clear_entities[0], abo, 0, &bo->base._resv,
> - &fence, AMDGPU_KERNEL_JOB_ID_CLEAR_ON_RELEASE);
> + &fence, NULL, 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 e1f0567fd2d5..b13f0993dbf1 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
> @@ -173,6 +173,7 @@ static void amdgpu_evict_flags(struct ttm_buffer_object *bo,
> * @tmz: if we should setup a TMZ enabled mapping
> * @size: in number of bytes to map, out number of bytes mapped
> * @addr: resulting address inside the MC address space
> + * @dep: optional dependency
> *
> * Setup one of the GART windows to access a specific piece of memory or return
> * the physical address for local memory.
> @@ -182,7 +183,8 @@ static int amdgpu_ttm_map_buffer(struct drm_sched_entity *entity,
> struct ttm_resource *mem,
> struct amdgpu_res_cursor *mm_cur,
> unsigned int window, struct amdgpu_ring *ring,
> - bool tmz, uint64_t *size, uint64_t *addr)
> + bool tmz, uint64_t *size, uint64_t *addr,
> + struct dma_fence *dep)
> {
> struct amdgpu_device *adev = ring->adev;
> unsigned int offset, num_pages, num_dw, num_bytes;
> @@ -234,6 +236,9 @@ static int amdgpu_ttm_map_buffer(struct drm_sched_entity *entity,
> if (r)
> return r;
>
> + if (dep)
> + drm_sched_job_add_dependency(&job->base, dma_fence_get(dep));
> +
> src_addr = num_dw * 4;
> src_addr += job->ibs[0].gpu_addr;
>
> @@ -326,13 +331,15 @@ static int amdgpu_ttm_copy_mem_to_mem(struct amdgpu_device *adev,
> /* Map src to window 0 and dst to window 1. */
> r = amdgpu_ttm_map_buffer(&entity->base,
> src->bo, src->mem, &src_mm,
> - entity->gart_window_id0, ring, tmz, &cur_size, &from);
> + entity->gart_window_id0, ring, tmz, &cur_size, &from,
> + NULL);
> if (r)
> goto error;
>
> r = amdgpu_ttm_map_buffer(&entity->base,
> dst->bo, dst->mem, &dst_mm,
> - entity->gart_window_id1, ring, tmz, &cur_size, &to);
> + entity->gart_window_id1, ring, tmz, &cur_size, &to,
> + NULL);
> if (r)
> goto error;
>
> @@ -415,7 +422,7 @@ static int amdgpu_move_blit(struct ttm_buffer_object *bo,
> struct dma_fence *wipe_fence = NULL;
>
> r = amdgpu_fill_buffer(&adev->mman.move_entities[0],
> - abo, 0, NULL, &wipe_fence,
> + abo, 0, NULL, &wipe_fence, fence,
> AMDGPU_KERNEL_JOB_ID_MOVE_BLIT);
> if (r) {
> goto error;
> @@ -2443,7 +2450,8 @@ int amdgpu_ttm_clear_buffer(struct amdgpu_bo *bo,
>
> r = amdgpu_ttm_map_buffer(&entity->base,
> &bo->tbo, bo->tbo.resource, &cursor,
> - entity->gart_window_id1, ring, false, &size, &addr);
> + entity->gart_window_id1, ring, false, &size, &addr,
> + NULL);
> if (r)
> goto err;
>
> @@ -2469,6 +2477,7 @@ int amdgpu_fill_buffer(struct amdgpu_ttm_buffer_entity *entity,
> uint32_t src_data,
> struct dma_resv *resv,
> struct dma_fence **f,
> + struct dma_fence *dependency,
> u64 k_job_id)
> {
> struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
> @@ -2496,7 +2505,8 @@ int amdgpu_fill_buffer(struct amdgpu_ttm_buffer_entity *entity,
> r = amdgpu_ttm_map_buffer(&entity->base,
> &bo->tbo, bo->tbo.resource, &dst,
> entity->gart_window_id1, ring, false,
> - &cur_size, &to);
> + &cur_size, &to,
> + dependency);
> if (r)
> goto error;
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h
> index 9d4891e86675..e8f8165f5bcf 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h
> @@ -186,6 +186,7 @@ int amdgpu_fill_buffer(struct amdgpu_ttm_buffer_entity *entity,
> uint32_t src_data,
> struct dma_resv *resv,
> struct dma_fence **f,
> + struct dma_fence *dependency,
> u64 k_job_id);
>
> int amdgpu_ttm_alloc_gart(struct ttm_buffer_object *bo);
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