Re: [PATCH 03/10] drm: revert "expand replace_fence to support timeline point v2"

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在 2018/12/4 19:59, Christian König 写道:
> This reverts commit 9a09a42369a4a37a959c051d8e1a1f948c1529a4.
>
> The whole interface isn't thought through. Since this function can't
> fail we actually can't allocate an object to store the sync point.
>
> Sorry, I should have taken the lead on this from the very beginning and
> reviewed it more thoughtfully. Going to propose a new interface as a
> follow up change.
>
> Signed-off-by: Christian König <christian.koenig@xxxxxxx>
Reviewed-by: Chunming Zhou <david1.zhou@xxxxxxx>

> ---
>   drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c     |  2 +-
>   drivers/gpu/drm/drm_syncobj.c              | 14 ++++++--------
>   drivers/gpu/drm/i915/i915_gem_execbuffer.c |  2 +-
>   drivers/gpu/drm/v3d/v3d_gem.c              |  3 +--
>   drivers/gpu/drm/vc4/vc4_gem.c              |  2 +-
>   include/drm/drm_syncobj.h                  |  2 +-
>   6 files changed, 11 insertions(+), 14 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
> index c0740a924769..149b3065119b 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
> @@ -1200,7 +1200,7 @@ static void amdgpu_cs_post_dependencies(struct amdgpu_cs_parser *p)
>   	int i;
>   
>   	for (i = 0; i < p->num_post_dep_syncobjs; ++i)
> -		drm_syncobj_replace_fence(p->post_dep_syncobjs[i], 0, p->fence);
> +		drm_syncobj_replace_fence(p->post_dep_syncobjs[i], p->fence);
>   }
>   
>   static int amdgpu_cs_submit(struct amdgpu_cs_parser *p,
> diff --git a/drivers/gpu/drm/drm_syncobj.c b/drivers/gpu/drm/drm_syncobj.c
> index 5c5ba1f14307..db30a0e89db8 100644
> --- a/drivers/gpu/drm/drm_syncobj.c
> +++ b/drivers/gpu/drm/drm_syncobj.c
> @@ -140,13 +140,11 @@ void drm_syncobj_remove_callback(struct drm_syncobj *syncobj,
>   /**
>    * drm_syncobj_replace_fence - replace fence in a sync object.
>    * @syncobj: Sync object to replace fence in
> - * @point: timeline point
>    * @fence: fence to install in sync file.
>    *
> - * This replaces the fence on a sync object, or a timeline point fence.
> + * This replaces the fence on a sync object.
>    */
>   void drm_syncobj_replace_fence(struct drm_syncobj *syncobj,
> -			       u64 point,
>   			       struct dma_fence *fence)
>   {
>   	struct dma_fence *old_fence;
> @@ -184,7 +182,7 @@ static void drm_syncobj_assign_null_handle(struct drm_syncobj *syncobj)
>   {
>   	struct dma_fence *fence = dma_fence_get_stub();
>   
> -	drm_syncobj_replace_fence(syncobj, 0, fence);
> +	drm_syncobj_replace_fence(syncobj, fence);
>   	dma_fence_put(fence);
>   }
>   
> @@ -233,7 +231,7 @@ void drm_syncobj_free(struct kref *kref)
>   	struct drm_syncobj *syncobj = container_of(kref,
>   						   struct drm_syncobj,
>   						   refcount);
> -	drm_syncobj_replace_fence(syncobj, 0, NULL);
> +	drm_syncobj_replace_fence(syncobj, NULL);
>   	kfree(syncobj);
>   }
>   EXPORT_SYMBOL(drm_syncobj_free);
> @@ -267,7 +265,7 @@ int drm_syncobj_create(struct drm_syncobj **out_syncobj, uint32_t flags,
>   		drm_syncobj_assign_null_handle(syncobj);
>   
>   	if (fence)
> -		drm_syncobj_replace_fence(syncobj, 0, fence);
> +		drm_syncobj_replace_fence(syncobj, fence);
>   
>   	*out_syncobj = syncobj;
>   	return 0;
> @@ -452,7 +450,7 @@ static int drm_syncobj_import_sync_file_fence(struct drm_file *file_private,
>   		return -ENOENT;
>   	}
>   
> -	drm_syncobj_replace_fence(syncobj, 0, fence);
> +	drm_syncobj_replace_fence(syncobj, fence);
>   	dma_fence_put(fence);
>   	drm_syncobj_put(syncobj);
>   	return 0;
> @@ -923,7 +921,7 @@ drm_syncobj_reset_ioctl(struct drm_device *dev, void *data,
>   		return ret;
>   
>   	for (i = 0; i < args->count_handles; i++)
> -		drm_syncobj_replace_fence(syncobjs[i], 0, NULL);
> +		drm_syncobj_replace_fence(syncobjs[i], NULL);
>   
>   	drm_syncobj_array_free(syncobjs, args->count_handles);
>   
> diff --git a/drivers/gpu/drm/i915/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
> index 1aaccbe7e1de..786d719e652d 100644
> --- a/drivers/gpu/drm/i915/i915_gem_execbuffer.c
> +++ b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
> @@ -2186,7 +2186,7 @@ signal_fence_array(struct i915_execbuffer *eb,
>   		if (!(flags & I915_EXEC_FENCE_SIGNAL))
>   			continue;
>   
> -		drm_syncobj_replace_fence(syncobj, 0, fence);
> +		drm_syncobj_replace_fence(syncobj, fence);
>   	}
>   }
>   
> diff --git a/drivers/gpu/drm/v3d/v3d_gem.c b/drivers/gpu/drm/v3d/v3d_gem.c
> index b88c96911453..655be1a865fa 100644
> --- a/drivers/gpu/drm/v3d/v3d_gem.c
> +++ b/drivers/gpu/drm/v3d/v3d_gem.c
> @@ -588,8 +588,7 @@ v3d_submit_cl_ioctl(struct drm_device *dev, void *data,
>   	/* Update the return sync object for the */
>   	sync_out = drm_syncobj_find(file_priv, args->out_sync);
>   	if (sync_out) {
> -		drm_syncobj_replace_fence(sync_out, 0,
> -					  exec->render_done_fence);
> +		drm_syncobj_replace_fence(sync_out, exec->render_done_fence);
>   		drm_syncobj_put(sync_out);
>   	}
>   
> diff --git a/drivers/gpu/drm/vc4/vc4_gem.c b/drivers/gpu/drm/vc4/vc4_gem.c
> index 41881ce4132d..aea2b8dfec17 100644
> --- a/drivers/gpu/drm/vc4/vc4_gem.c
> +++ b/drivers/gpu/drm/vc4/vc4_gem.c
> @@ -681,7 +681,7 @@ vc4_queue_submit(struct drm_device *dev, struct vc4_exec_info *exec,
>   	exec->fence = &fence->base;
>   
>   	if (out_sync)
> -		drm_syncobj_replace_fence(out_sync, 0, exec->fence);
> +		drm_syncobj_replace_fence(out_sync, exec->fence);
>   
>   	vc4_update_bo_seqnos(exec, seqno);
>   
> diff --git a/include/drm/drm_syncobj.h b/include/drm/drm_syncobj.h
> index 2eda44def639..b1fe921f8e8f 100644
> --- a/include/drm/drm_syncobj.h
> +++ b/include/drm/drm_syncobj.h
> @@ -131,7 +131,7 @@ drm_syncobj_fence_get(struct drm_syncobj *syncobj)
>   
>   struct drm_syncobj *drm_syncobj_find(struct drm_file *file_private,
>   				     u32 handle);
> -void drm_syncobj_replace_fence(struct drm_syncobj *syncobj, u64 point,
> +void drm_syncobj_replace_fence(struct drm_syncobj *syncobj,
>   			       struct dma_fence *fence);
>   int drm_syncobj_find_fence(struct drm_file *file_private,
>   			   u32 handle, u64 point, u64 flags,

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