On Wed, Aug 22, 2018 at 10:52:16AM +0200, Christian König wrote:
> Am 22.08.2018 um 10:38 schrieb Chunming Zhou:
> > stub fence will be used by timeline syncobj as well.
> >
> > Change-Id: Ia4252f03c07a8105491d2791dc7c8c6976682285
> > Signed-off-by: Chunming Zhou <david1.z...@amd.com>
> > Cc: Jason Ekstrand <ja...@jlekstrand.net>
> > ---
> > 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);
>
> Copy&pasted from the old implementation, but that is certainly totally
> nonsense.
>
> dma_fence_enable_sw_signaling() is the function who is calling this
> callback.
>
> > + 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,
>
> The .wait callback should be dropped.
>
> Apart from that looks good to me.
.enable_signaling should probably also be dropped. Same also for wherever
you copied this from.
-Daniel
>
> Christian.
>
> > + .release = NULL,
> > +};
> > +
> > /**
> > * struct drm_syncobj - sync object.
> > *
>
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--
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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