On Thu, Jun 23, 2016 at 12:29:48PM -0300, Gustavo Padovan wrote:
> From: Gustavo Padovan <gustavo.padovan@xxxxxxxxxxxxxxx>
>
> get_fences() should return a copy of all fences in the fence as some
> fence subclass (such as fence_array) can store more than one fence at
> time.
>
> Signed-off-by: Gustavo Padovan <gustavo.padovan@xxxxxxxxxxxxxxx>
> ---
> drivers/dma-buf/fence.c | 14 ++++++++++++++
> include/linux/fence.h | 3 +++
> 2 files changed, 17 insertions(+)
>
> diff --git a/drivers/dma-buf/fence.c b/drivers/dma-buf/fence.c
> index 4e61afb..f4094fd 100644
> --- a/drivers/dma-buf/fence.c
> +++ b/drivers/dma-buf/fence.c
> @@ -185,6 +185,20 @@ void fence_release(struct kref *kref)
> }
> EXPORT_SYMBOL(fence_release);
>
kerneldoc missing.
-Daniel
> +struct fence **fence_get_fences(struct fence *fence)
> +{
> + if (fence->ops->get_fences) {
> + return fence->ops->get_fences(fence);
> + } else {
> + struct fence **fences = kmalloc(sizeof(**fences), GFP_KERNEL);
> + if (!fences)
> + return NULL;
> + fences[0] = fence;
> + return fences;
> + }
> +}
> +EXPORT_SYMBOL(fence_get_fences);
> +
> void fence_teardown(struct fence *fence)
> {
> if (fence->ops->teardown)
> diff --git a/include/linux/fence.h b/include/linux/fence.h
> index 1d3b671..a7a2fbc 100644
> --- a/include/linux/fence.h
> +++ b/include/linux/fence.h
> @@ -111,6 +111,7 @@ struct fence_cb {
> * struct fence_ops - operations implemented for fence
> * @get_driver_name: returns the driver name.
> * @get_timeline_name: return the name of the context this fence belongs to.
> + * @get_fences: return an array with a copy of all fences in the fence.
> * @enable_signaling: enable software signaling of fence.
> * @signaled: [optional] peek whether the fence is signaled, can be null.
> * @wait: custom wait implementation, or fence_default_wait.
> @@ -175,6 +176,7 @@ struct fence_cb {
> struct fence_ops {
> const char * (*get_driver_name)(struct fence *fence);
> const char * (*get_timeline_name)(struct fence *fence);
> + struct fence ** (*get_fences)(struct fence *fence);
> bool (*enable_signaling)(struct fence *fence);
> bool (*signaled)(struct fence *fence);
> signed long (*wait)(struct fence *fence, bool intr, signed long timeout);
> @@ -189,6 +191,7 @@ struct fence_ops {
> void fence_init(struct fence *fence, const struct fence_ops *ops,
> spinlock_t *lock, u64 context, unsigned seqno);
>
> +struct fence **fence_get_fences(struct fence *fence);
> void fence_release(struct kref *kref);
> void fence_teardown(struct fence *fence);
> void fence_free(struct fence *fence);
> --
> 2.5.5
>
--
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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