// SPDX-License-Identifier: GPL-2.0-only

  /*
   * seqno-fence, using a dma-buf to synchronize fencing
   *
   * Copyright (C) 2012 Texas Instruments
   * Copyright (C) 2012-2014 Canonical Ltd
   * Authors:
   *   Rob Clark <robdclark@gmail.com>
   *   Maarten Lankhorst <maarten.lankhorst@canonical.com>

   */
  
  #include <linux/slab.h>
  #include <linux/export.h>
  #include <linux/seqno-fence.h>

  static const char *seqno_fence_get_driver_name(struct dma_fence *fence)

  {
  	struct seqno_fence *seqno_fence = to_seqno_fence(fence);

  	return seqno_fence->ops->get_driver_name(fence);
  }

  static const char *seqno_fence_get_timeline_name(struct dma_fence *fence)

  {
  	struct seqno_fence *seqno_fence = to_seqno_fence(fence);

  	return seqno_fence->ops->get_timeline_name(fence);
  }

  static bool seqno_enable_signaling(struct dma_fence *fence)

  {
  	struct seqno_fence *seqno_fence = to_seqno_fence(fence);

  	return seqno_fence->ops->enable_signaling(fence);
  }

  static bool seqno_signaled(struct dma_fence *fence)

  {
  	struct seqno_fence *seqno_fence = to_seqno_fence(fence);

  	return seqno_fence->ops->signaled && seqno_fence->ops->signaled(fence);
  }

  static void seqno_release(struct dma_fence *fence)

  {
  	struct seqno_fence *f = to_seqno_fence(fence);
  
  	dma_buf_put(f->sync_buf);
  	if (f->ops->release)
  		f->ops->release(fence);
  	else

  		dma_fence_free(&f->base);

  }

  static signed long seqno_wait(struct dma_fence *fence, bool intr,
  			      signed long timeout)

  {
  	struct seqno_fence *f = to_seqno_fence(fence);

  	return f->ops->wait(fence, intr, timeout);
  }

  const struct dma_fence_ops seqno_fence_ops = {

  	.get_driver_name = seqno_fence_get_driver_name,
  	.get_timeline_name = seqno_fence_get_timeline_name,
  	.enable_signaling = seqno_enable_signaling,
  	.signaled = seqno_signaled,
  	.wait = seqno_wait,
  	.release = seqno_release,
  };
  EXPORT_SYMBOL(seqno_fence_ops);