On Wed, Aug 22, 2018 at 04:38:56PM +0800, Chunming Zhou wrote:
> stub fence will be used by timeline syncobj as well.
>
> Change-Id: Ia4252f03c07a8105491d2791dc7c8c6976682285
> Signed-off-by: Chunming Zhou <david1.zhou@xxxxxxx>
> Cc: Jason Ekstrand <jason@xxxxxxxxxxxxxx>
Please don't expose stuff only used by the drm_syncobj implementation to
drivers. Gives us a very unclean driver interface. Imo this should all be
left within drm_syncobj.h.
See also my comments for patch 2, you leak all the implemenation details
to drivers. We need to fix that and have a clear interface.
-Daniel
> ---
> drivers/gpu/drm/drm_syncobj.c | 28 ++--------------------------
> include/drm/drm_syncobj.h | 24 ++++++++++++++++++++++++
> 2 files changed, 26 insertions(+), 26 deletions(-)
>
> diff --git a/drivers/gpu/drm/drm_syncobj.c b/drivers/gpu/drm/drm_syncobj.c
> index d4f4ce484529..70af32d0def1 100644
> --- a/drivers/gpu/drm/drm_syncobj.c
> +++ b/drivers/gpu/drm/drm_syncobj.c
> @@ -187,39 +187,15 @@ void drm_syncobj_replace_fence(struct drm_syncobj *syncobj,
> }
> EXPORT_SYMBOL(drm_syncobj_replace_fence);
>
> -struct drm_syncobj_null_fence {
> - struct dma_fence base;
> - spinlock_t lock;
> -};
> -
> -static const char *drm_syncobj_null_fence_get_name(struct dma_fence *fence)
> -{
> - return "syncobjnull";
> -}
> -
> -static bool drm_syncobj_null_fence_enable_signaling(struct dma_fence *fence)
> -{
> - dma_fence_enable_sw_signaling(fence);
> - return !dma_fence_is_signaled(fence);
> -}
> -
> -static const struct dma_fence_ops drm_syncobj_null_fence_ops = {
> - .get_driver_name = drm_syncobj_null_fence_get_name,
> - .get_timeline_name = drm_syncobj_null_fence_get_name,
> - .enable_signaling = drm_syncobj_null_fence_enable_signaling,
> - .wait = dma_fence_default_wait,
> - .release = NULL,
> -};
> -
> static int drm_syncobj_assign_null_handle(struct drm_syncobj *syncobj)
> {
> - struct drm_syncobj_null_fence *fence;
> + struct drm_syncobj_stub_fence *fence;
> fence = kzalloc(sizeof(*fence), GFP_KERNEL);
> if (fence == NULL)
> return -ENOMEM;
>
> spin_lock_init(&fence->lock);
> - dma_fence_init(&fence->base, &drm_syncobj_null_fence_ops,
> + dma_fence_init(&fence->base, &drm_syncobj_stub_fence_ops,
> &fence->lock, 0, 0);
> dma_fence_signal(&fence->base);
>
> diff --git a/include/drm/drm_syncobj.h b/include/drm/drm_syncobj.h
> index 3980602472c0..b04c492ddbb5 100644
> --- a/include/drm/drm_syncobj.h
> +++ b/include/drm/drm_syncobj.h
> @@ -30,6 +30,30 @@
>
> struct drm_syncobj_cb;
>
> +struct drm_syncobj_stub_fence {
> + struct dma_fence base;
> + spinlock_t lock;
> +};
> +
> +const char *drm_syncobj_stub_fence_get_name(struct dma_fence *fence)
> +{
> + return "syncobjstub";
> +}
> +
> +bool drm_syncobj_stub_fence_enable_signaling(struct dma_fence *fence)
> +{
> + dma_fence_enable_sw_signaling(fence);
> + return !dma_fence_is_signaled(fence);
> +}
> +
> +const struct dma_fence_ops drm_syncobj_stub_fence_ops = {
> + .get_driver_name = drm_syncobj_stub_fence_get_name,
> + .get_timeline_name = drm_syncobj_stub_fence_get_name,
> + .enable_signaling = drm_syncobj_stub_fence_enable_signaling,
> + .wait = dma_fence_default_wait,
> + .release = NULL,
> +};
> +
> /**
> * struct drm_syncobj - sync object.
> *
> --
> 2.14.1
>
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--
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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