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Message-ID: <696b6fd1-9590-4395-a7a8-2888ceb8adc0@amd.com>
Date: Fri, 21 Nov 2025 14:23:10 +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>, Felix Kuehling <Felix.Kuehling@....com>,
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 v3 09/28] drm/amdgpu: pass the entity to use to ttm public
functions
On 11/21/25 11:12, Pierre-Eric Pelloux-Prayer wrote:
> This way the caller can select the one it wants to use.
>
> Signed-off-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@....com>
I'm wondering if it wouldn't make sense to put a pointer to adev into each amdgpu_ttm_buffer_entity.
But that is maybe something for another patch. For now:
Reviewed-by: Christian König <christian.koenig@....com>
> ---
> drivers/gpu/drm/amd/amdgpu/amdgpu_benchmark.c | 3 +-
> drivers/gpu/drm/amd/amdgpu/amdgpu_object.c | 4 +--
> drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 34 +++++++++----------
> drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h | 16 +++++----
> drivers/gpu/drm/amd/amdkfd/kfd_migrate.c | 3 +-
> 5 files changed, 32 insertions(+), 28 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_benchmark.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_benchmark.c
> index 3636b757c974..a050167e76a4 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_benchmark.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_benchmark.c
> @@ -37,7 +37,8 @@ static int amdgpu_benchmark_do_move(struct amdgpu_device *adev, unsigned size,
>
> stime = ktime_get();
> for (i = 0; i < n; i++) {
> - r = amdgpu_copy_buffer(adev, saddr, daddr, size, NULL, &fence,
> + r = amdgpu_copy_buffer(adev, &adev->mman.default_entity,
> + saddr, daddr, size, NULL, &fence,
> false, 0);
> if (r)
> goto exit_do_move;
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
> index 926a3f09a776..858eb9fa061b 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
> @@ -1322,8 +1322,8 @@ void amdgpu_bo_release_notify(struct ttm_buffer_object *bo)
> if (r)
> goto out;
>
> - r = amdgpu_fill_buffer(abo, 0, &bo->base._resv, &fence, true,
> - AMDGPU_KERNEL_JOB_ID_CLEAR_ON_RELEASE);
> + r = amdgpu_fill_buffer(&adev->mman.clear_entity, abo, 0, &bo->base._resv,
> + &fence, 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 3d850893b97f..1d3afad885da 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
> @@ -359,7 +359,7 @@ static int amdgpu_ttm_copy_mem_to_mem(struct amdgpu_device *adev,
> write_compress_disable));
> }
>
> - r = amdgpu_copy_buffer(adev, from, to, cur_size, resv,
> + r = amdgpu_copy_buffer(adev, entity, from, to, cur_size, resv,
> &next, true, copy_flags);
> if (r)
> goto error;
> @@ -414,8 +414,9 @@ 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(abo, 0, NULL, &wipe_fence,
> - false, AMDGPU_KERNEL_JOB_ID_MOVE_BLIT);
> + r = amdgpu_fill_buffer(&adev->mman.move_entity,
> + abo, 0, NULL, &wipe_fence,
> + AMDGPU_KERNEL_JOB_ID_MOVE_BLIT);
> if (r) {
> goto error;
> } else if (wipe_fence) {
> @@ -2258,7 +2259,9 @@ static int amdgpu_ttm_prepare_job(struct amdgpu_device *adev,
> DMA_RESV_USAGE_BOOKKEEP);
> }
>
> -int amdgpu_copy_buffer(struct amdgpu_device *adev, uint64_t src_offset,
> +int amdgpu_copy_buffer(struct amdgpu_device *adev,
> + struct amdgpu_ttm_buffer_entity *entity,
> + uint64_t src_offset,
> uint64_t dst_offset, uint32_t byte_count,
> struct dma_resv *resv,
> struct dma_fence **fence,
> @@ -2282,7 +2285,7 @@ int amdgpu_copy_buffer(struct amdgpu_device *adev, uint64_t src_offset,
> max_bytes = adev->mman.buffer_funcs->copy_max_bytes;
> num_loops = DIV_ROUND_UP(byte_count, max_bytes);
> num_dw = ALIGN(num_loops * adev->mman.buffer_funcs->copy_num_dw, 8);
> - r = amdgpu_ttm_prepare_job(adev, &adev->mman.move_entity, num_dw,
> + r = amdgpu_ttm_prepare_job(adev, entity, num_dw,
> resv, vm_needs_flush, &job,
> AMDGPU_KERNEL_JOB_ID_TTM_COPY_BUFFER);
> if (r)
> @@ -2411,22 +2414,18 @@ int amdgpu_ttm_clear_buffer(struct amdgpu_bo *bo,
> return r;
> }
>
> -int amdgpu_fill_buffer(struct amdgpu_bo *bo,
> - uint32_t src_data,
> - struct dma_resv *resv,
> - struct dma_fence **f,
> - bool delayed,
> - u64 k_job_id)
> +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,
> + u64 k_job_id)
> {
> struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
> - struct amdgpu_ttm_buffer_entity *entity;
> struct dma_fence *fence = NULL;
> struct amdgpu_res_cursor dst;
> int r;
>
> - entity = delayed ? &adev->mman.clear_entity :
> - &adev->mman.move_entity;
> -
> if (!adev->mman.buffer_funcs_enabled) {
> dev_err(adev->dev,
> "Trying to clear memory with ring turned off.\n");
> @@ -2443,13 +2442,14 @@ int amdgpu_fill_buffer(struct amdgpu_bo *bo,
> /* Never fill more than 256MiB at once to avoid timeouts */
> cur_size = min(dst.size, 256ULL << 20);
>
> - r = amdgpu_ttm_map_buffer(adev, &adev->mman.default_entity,
> + r = amdgpu_ttm_map_buffer(adev, entity,
> &bo->tbo, bo->tbo.resource, &dst,
> 1, false, &cur_size, &to);
> if (r)
> goto error;
>
> - r = amdgpu_ttm_fill_mem(adev, entity, src_data, to, cur_size, resv,
> + r = amdgpu_ttm_fill_mem(adev, entity,
> + src_data, to, cur_size, resv,
> &next, true, k_job_id);
> 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 41bbc25680a2..9288599c9c46 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h
> @@ -167,7 +167,9 @@ int amdgpu_ttm_init(struct amdgpu_device *adev);
> void amdgpu_ttm_fini(struct amdgpu_device *adev);
> void amdgpu_ttm_set_buffer_funcs_status(struct amdgpu_device *adev,
> bool enable);
> -int amdgpu_copy_buffer(struct amdgpu_device *adev, uint64_t src_offset,
> +int amdgpu_copy_buffer(struct amdgpu_device *adev,
> + struct amdgpu_ttm_buffer_entity *entity,
> + uint64_t src_offset,
> uint64_t dst_offset, uint32_t byte_count,
> struct dma_resv *resv,
> struct dma_fence **fence,
> @@ -175,12 +177,12 @@ int amdgpu_copy_buffer(struct amdgpu_device *adev, uint64_t src_offset,
> int amdgpu_ttm_clear_buffer(struct amdgpu_bo *bo,
> struct dma_resv *resv,
> struct dma_fence **fence);
> -int amdgpu_fill_buffer(struct amdgpu_bo *bo,
> - uint32_t src_data,
> - struct dma_resv *resv,
> - struct dma_fence **fence,
> - bool delayed,
> - u64 k_job_id);
> +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,
> + u64 k_job_id);
>
> int amdgpu_ttm_alloc_gart(struct ttm_buffer_object *bo);
> void amdgpu_ttm_recover_gart(struct ttm_buffer_object *tbo);
> diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_migrate.c b/drivers/gpu/drm/amd/amdkfd/kfd_migrate.c
> index ade1d4068d29..9c76f1ba0e55 100644
> --- a/drivers/gpu/drm/amd/amdkfd/kfd_migrate.c
> +++ b/drivers/gpu/drm/amd/amdkfd/kfd_migrate.c
> @@ -157,7 +157,8 @@ svm_migrate_copy_memory_gart(struct amdgpu_device *adev, dma_addr_t *sys,
> goto out_unlock;
> }
>
> - r = amdgpu_copy_buffer(adev, gart_s, gart_d, size * PAGE_SIZE,
> + r = amdgpu_copy_buffer(adev, entity,
> + gart_s, gart_d, size * PAGE_SIZE,
> NULL, &next, true, 0);
> if (r) {
> dev_err(adev->dev, "fail %d to copy memory\n", r);
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