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Message-ID: <1ef63068-1352-4e8a-abea-bfad5f7a2198@damsy.net>
Date: Fri, 14 Nov 2025 15:41:43 +0100
From: Pierre-Eric Pelloux-Prayer <pierre-eric@...sy.net>
To: Christian König <christian.koenig@....com>,
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 v2 05/20] drm/amdgpu: pass the entity to use to ttm
functions
Le 14/11/2025 à 14:07, Christian König a écrit :
> On 11/13/25 17:05, 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>
>> ---
>> 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 | 75 +++++++++++--------
>> drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h | 16 ++--
>> drivers/gpu/drm/amd/amdkfd/kfd_migrate.c | 3 +-
>> 5 files changed, 60 insertions(+), 41 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_benchmark.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_benchmark.c
>> index 02c2479a8840..b59040a8771f 100644
>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_benchmark.c
>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_benchmark.c
>> @@ -38,7 +38,8 @@ static int amdgpu_benchmark_do_move(struct amdgpu_device *adev, unsigned size,
>> stime = ktime_get();
>> for (i = 0; i < n; i++) {
>> struct amdgpu_ring *ring = adev->mman.buffer_funcs_ring;
>> - r = amdgpu_copy_buffer(ring, saddr, daddr, size, NULL, &fence,
>> + r = amdgpu_copy_buffer(ring, &adev->mman.default_entity.base,
>> + 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 e08f58de4b17..c06c132a753c 100644
>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
>> @@ -1321,8 +1321,8 @@ 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 42d448cd6a6d..c8d59ca2b3bd 100644
>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
>> @@ -164,6 +164,7 @@ static void amdgpu_evict_flags(struct ttm_buffer_object *bo,
>>
>> /**
>> * amdgpu_ttm_map_buffer - Map memory into the GART windows
>> + * @entity: entity to run the window setup job
>> * @bo: buffer object to map
>> * @mem: memory object to map
>> * @mm_cur: range to map
>> @@ -176,7 +177,8 @@ static void amdgpu_evict_flags(struct ttm_buffer_object *bo,
>> * Setup one of the GART windows to access a specific piece of memory or return
>> * the physical address for local memory.
>> */
>> -static int amdgpu_ttm_map_buffer(struct ttm_buffer_object *bo,
>> +static int amdgpu_ttm_map_buffer(struct drm_sched_entity *entity,
>> + struct ttm_buffer_object *bo,
>
>
> Probably better to split this patch into multiple patches.
>
> One which changes amdgpu_ttm_map_buffer() and then another one or two for the higher level copy_buffer and fill_buffer functions.
OK.
>
>> struct ttm_resource *mem,
>> struct amdgpu_res_cursor *mm_cur,
>> unsigned int window, struct amdgpu_ring *ring,
>> @@ -224,7 +226,7 @@ static int amdgpu_ttm_map_buffer(struct ttm_buffer_object *bo,
>> num_dw = ALIGN(adev->mman.buffer_funcs->copy_num_dw, 8);
>> num_bytes = num_pages * 8 * AMDGPU_GPU_PAGES_IN_CPU_PAGE;
>>
>> - r = amdgpu_job_alloc_with_ib(adev, &adev->mman.default_entity.base,
>> + r = amdgpu_job_alloc_with_ib(adev, entity,
>> AMDGPU_FENCE_OWNER_UNDEFINED,
>> num_dw * 4 + num_bytes,
>> AMDGPU_IB_POOL_DELAYED, &job,
>> @@ -274,6 +276,7 @@ static int amdgpu_ttm_map_buffer(struct ttm_buffer_object *bo,
>> /**
>> * amdgpu_ttm_copy_mem_to_mem - Helper function for copy
>> * @adev: amdgpu device
>> + * @entity: entity to run the jobs
>> * @src: buffer/address where to read from
>> * @dst: buffer/address where to write to
>> * @size: number of bytes to copy
>> @@ -288,6 +291,7 @@ static int amdgpu_ttm_map_buffer(struct ttm_buffer_object *bo,
>> */
>> __attribute__((nonnull))
>> static int amdgpu_ttm_copy_mem_to_mem(struct amdgpu_device *adev,
>> + struct drm_sched_entity *entity,
>> const struct amdgpu_copy_mem *src,
>> const struct amdgpu_copy_mem *dst,
>> uint64_t size, bool tmz,
>> @@ -320,12 +324,14 @@ static int amdgpu_ttm_copy_mem_to_mem(struct amdgpu_device *adev,
>> cur_size = min3(src_mm.size, dst_mm.size, 256ULL << 20);
>>
>> /* Map src to window 0 and dst to window 1. */
>> - r = amdgpu_ttm_map_buffer(src->bo, src->mem, &src_mm,
>> + r = amdgpu_ttm_map_buffer(entity,
>> + src->bo, src->mem, &src_mm,
>> 0, ring, tmz, &cur_size, &from);
>> if (r)
>> goto error;
>>
>> - r = amdgpu_ttm_map_buffer(dst->bo, dst->mem, &dst_mm,
>> + r = amdgpu_ttm_map_buffer(entity,
>> + dst->bo, dst->mem, &dst_mm,
>> 1, ring, tmz, &cur_size, &to);
>> if (r)
>> goto error;
>> @@ -353,7 +359,7 @@ static int amdgpu_ttm_copy_mem_to_mem(struct amdgpu_device *adev,
>> write_compress_disable));
>> }
>>
>> - r = amdgpu_copy_buffer(ring, from, to, cur_size, resv,
>> + r = amdgpu_copy_buffer(ring, entity, from, to, cur_size, resv,
>> &next, true, copy_flags);
>> if (r)
>> goto error;
>> @@ -394,7 +400,9 @@ static int amdgpu_move_blit(struct ttm_buffer_object *bo,
>> src.offset = 0;
>> dst.offset = 0;
>>
>> - r = amdgpu_ttm_copy_mem_to_mem(adev, &src, &dst,
>> + r = amdgpu_ttm_copy_mem_to_mem(adev,
>> + &adev->mman.move_entity.base,
>> + &src, &dst,
>> new_mem->size,
>> amdgpu_bo_encrypted(abo),
>> bo->base.resv, &fence);
>> @@ -406,8 +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) {
>> @@ -2223,16 +2232,15 @@ void amdgpu_ttm_set_buffer_funcs_status(struct amdgpu_device *adev, bool enable)
>> }
>>
>> static int amdgpu_ttm_prepare_job(struct amdgpu_device *adev,
>> + struct drm_sched_entity *entity,
>> unsigned int num_dw,
>> struct dma_resv *resv,
>> bool vm_needs_flush,
>> struct amdgpu_job **job,
>> - bool delayed, u64 k_job_id)
>> + u64 k_job_id)
>> {
>> enum amdgpu_ib_pool_type pool = AMDGPU_IB_POOL_DELAYED;
>> int r;
>> - struct drm_sched_entity *entity = delayed ? &adev->mman.clear_entity.base :
>> - &adev->mman.move_entity.base;
>> r = amdgpu_job_alloc_with_ib(adev, entity,
>> AMDGPU_FENCE_OWNER_UNDEFINED,
>> num_dw * 4, pool, job, k_job_id);
>> @@ -2252,7 +2260,9 @@ static int amdgpu_ttm_prepare_job(struct amdgpu_device *adev,
>> DMA_RESV_USAGE_BOOKKEEP);
>> }
>>
>> -int amdgpu_copy_buffer(struct amdgpu_ring *ring, uint64_t src_offset,
>> +int amdgpu_copy_buffer(struct amdgpu_ring *ring,
>> + struct drm_sched_entity *entity,
>> + uint64_t src_offset,
>> uint64_t dst_offset, uint32_t byte_count,
>> struct dma_resv *resv,
>> struct dma_fence **fence,
>> @@ -2274,8 +2284,8 @@ int amdgpu_copy_buffer(struct amdgpu_ring *ring, 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, num_dw,
>> - resv, vm_needs_flush, &job, false,
>> + r = amdgpu_ttm_prepare_job(adev, entity, num_dw,
>> + resv, vm_needs_flush, &job,
>> AMDGPU_KERNEL_JOB_ID_TTM_COPY_BUFFER);
>> if (r)
>> return r;
>> @@ -2304,11 +2314,13 @@ int amdgpu_copy_buffer(struct amdgpu_ring *ring, uint64_t src_offset,
>> return r;
>> }
>>
>> -static int amdgpu_ttm_fill_mem(struct amdgpu_ring *ring, uint32_t src_data,
>> +static int amdgpu_ttm_fill_mem(struct amdgpu_ring *ring,
>> + struct drm_sched_entity *entity,
>> + uint32_t src_data,
>> uint64_t dst_addr, uint32_t byte_count,
>> struct dma_resv *resv,
>> struct dma_fence **fence,
>> - bool vm_needs_flush, bool delayed,
>> + bool vm_needs_flush,
>> u64 k_job_id)
>> {
>> struct amdgpu_device *adev = ring->adev;
>> @@ -2321,8 +2333,8 @@ static int amdgpu_ttm_fill_mem(struct amdgpu_ring *ring, uint32_t src_data,
>> max_bytes = adev->mman.buffer_funcs->fill_max_bytes;
>> num_loops = DIV_ROUND_UP_ULL(byte_count, max_bytes);
>> num_dw = ALIGN(num_loops * adev->mman.buffer_funcs->fill_num_dw, 8);
>> - r = amdgpu_ttm_prepare_job(adev, num_dw, resv, vm_needs_flush,
>> - &job, delayed, k_job_id);
>> + r = amdgpu_ttm_prepare_job(adev, entity, num_dw, resv,
>> + vm_needs_flush, &job, k_job_id);
>> if (r)
>> return r;
>>
>> @@ -2386,13 +2398,14 @@ int amdgpu_ttm_clear_buffer(struct amdgpu_bo *bo,
>> /* Never clear more than 256MiB at once to avoid timeouts */
>> size = min(cursor.size, 256ULL << 20);
>>
>> - r = amdgpu_ttm_map_buffer(&bo->tbo, bo->tbo.resource, &cursor,
>> + r = amdgpu_ttm_map_buffer(&adev->mman.clear_entity.base,
>> + &bo->tbo, bo->tbo.resource, &cursor,
>> 1, ring, false, &size, &addr);
>> if (r)
>> goto err;
>>
>> - r = amdgpu_ttm_fill_mem(ring, 0, addr, size, resv,
>> - &next, true, true,
>> + r = amdgpu_ttm_fill_mem(ring, &adev->mman.clear_entity.base, 0, addr, size, resv,
>> + &next, true,
>> AMDGPU_KERNEL_JOB_ID_TTM_CLEAR_BUFFER);
>> if (r)
>> goto err;
>> @@ -2408,12 +2421,12 @@ 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_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_ring *ring = adev->mman.buffer_funcs_ring;
>> @@ -2437,13 +2450,15 @@ 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(&bo->tbo, bo->tbo.resource, &dst,
>> + r = amdgpu_ttm_map_buffer(&entity->base,
>> + &bo->tbo, bo->tbo.resource, &dst,
>> 1, ring, false, &cur_size, &to);
>> if (r)
>> goto error;
>>
>> - r = amdgpu_ttm_fill_mem(ring, src_data, to, cur_size, resv,
>> - &next, true, delayed, k_job_id);
>> + r = amdgpu_ttm_fill_mem(ring, &entity->base,
>> + 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 d2295d6c2b67..e1655f86a016 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_ring *ring, uint64_t src_offset,
>> +int amdgpu_copy_buffer(struct amdgpu_ring *ring,
>> + struct drm_sched_entity *entity,
>
> If I'm not completely mistaken you should be able to drop the ring argument since that can be determined from the entity.
OK will do.
Pierre-Eric
>
> Apart from that looks rather good to me.
>
> Regards,
> Christian.
>
>> + 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_ring *ring, 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_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 d74ff6e90590..09756132fa1b 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(ring, gart_s, gart_d, size * PAGE_SIZE,
>> + r = amdgpu_copy_buffer(ring, &entity->base,
>> + 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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