linux-kernel - Re: [PATCH v3 10/28] drm/amdgpu: add amdgpu_device argument to ttm functions that need it

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Message-ID: <3708bb5d-6b3f-4817-a25a-5a7b90918d0c@amd.com>
Date: Fri, 21 Nov 2025 14:24:29 +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>
Cc: amd-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 10/28] drm/amdgpu: add amdgpu_device argument to ttm
 functions that need it

On 11/21/25 11:12, Pierre-Eric Pelloux-Prayer wrote:
> Instead of getting it through amdgpu_ttm_adev(bo->tbo.bdev).

Why should that be a good idea?

Regards,
Christian.

> 
> Signed-off-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@....com>
> ---
>  drivers/gpu/drm/amd/amdgpu/amdgpu_object.c |  5 +++--
>  drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c    | 11 ++++++-----
>  drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h    |  6 ++++--
>  3 files changed, 13 insertions(+), 9 deletions(-)
> 
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
> index 858eb9fa061b..2ee48f76483d 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
> @@ -725,7 +725,7 @@ 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_ttm_clear_buffer(adev, bo, bo->tbo.base.resv, &fence);
>  		if (unlikely(r))
>  			goto fail_unreserve;
>  
> @@ -1322,7 +1322,8 @@ void amdgpu_bo_release_notify(struct ttm_buffer_object *bo)
>  	if (r)
>  		goto out;
>  
> -	r = amdgpu_fill_buffer(&adev->mman.clear_entity, abo, 0, &bo->base._resv,
> +	r = amdgpu_fill_buffer(adev,
> +			       &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 1d3afad885da..57dff2df433b 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
> @@ -414,7 +414,7 @@ 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(&adev->mman.move_entity,
> +		r = amdgpu_fill_buffer(adev, &adev->mman.move_entity,
>  				       abo, 0, NULL, &wipe_fence,
>  				       AMDGPU_KERNEL_JOB_ID_MOVE_BLIT);
>  		if (r) {
> @@ -2350,6 +2350,7 @@ static int amdgpu_ttm_fill_mem(struct amdgpu_device *adev,
>  
>  /**
>   * amdgpu_ttm_clear_buffer - clear memory buffers
> + * @adev: amdgpu device object
>   * @bo: amdgpu buffer object
>   * @resv: reservation object
>   * @fence: dma_fence associated with the operation
> @@ -2359,11 +2360,11 @@ static int amdgpu_ttm_fill_mem(struct amdgpu_device *adev,
>   * Returns:
>   * 0 for success or a negative error code on failure.
>   */
> -int amdgpu_ttm_clear_buffer(struct amdgpu_bo *bo,
> +int amdgpu_ttm_clear_buffer(struct amdgpu_device *adev,
> +			    struct amdgpu_bo *bo,
>  			    struct dma_resv *resv,
>  			    struct dma_fence **fence)
>  {
> -	struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
>  	struct amdgpu_res_cursor cursor;
>  	u64 addr;
>  	int r = 0;
> @@ -2414,14 +2415,14 @@ int amdgpu_ttm_clear_buffer(struct amdgpu_bo *bo,
>  	return r;
>  }
>  
> -int amdgpu_fill_buffer(struct amdgpu_ttm_buffer_entity *entity,
> +int amdgpu_fill_buffer(struct amdgpu_device *adev,
> +		       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 dma_fence *fence = NULL;
>  	struct amdgpu_res_cursor dst;
>  	int r;
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h
> index 9288599c9c46..d0f55a7edd30 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h
> @@ -174,10 +174,12 @@ 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,
> +int amdgpu_ttm_clear_buffer(struct amdgpu_device *adev,
> +			    struct amdgpu_bo *bo,
>  			    struct dma_resv *resv,
>  			    struct dma_fence **fence);
> -int amdgpu_fill_buffer(struct amdgpu_ttm_buffer_entity *entity,
> +int amdgpu_fill_buffer(struct amdgpu_device *adev,
> +		       struct amdgpu_ttm_buffer_entity *entity,
>  		       struct amdgpu_bo *bo,
>  		       uint32_t src_data,
>  		       struct dma_resv *resv,