1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * seqno-fence, using a dma-buf to synchronize fencing
4 *
5 * Copyright (C) 2012 Texas Instruments
6 * Copyright (C) 2012-2014 Canonical Ltd
7 * Authors:
8 *   Rob Clark <robdclark@gmail.com>
9 *   Maarten Lankhorst <maarten.lankhorst@canonical.com>
10 */
11
12#include <linux/slab.h>
13#include <linux/export.h>
14#include <linux/seqno-fence.h>
15
16static const char *seqno_fence_get_driver_name(struct dma_fence *fence)
17{
18	struct seqno_fence *seqno_fence = to_seqno_fence(fence);
19
20	return seqno_fence->ops->get_driver_name(fence);
21}
22
23static const char *seqno_fence_get_timeline_name(struct dma_fence *fence)
24{
25	struct seqno_fence *seqno_fence = to_seqno_fence(fence);
26
27	return seqno_fence->ops->get_timeline_name(fence);
28}
29
30static bool seqno_enable_signaling(struct dma_fence *fence)
31{
32	struct seqno_fence *seqno_fence = to_seqno_fence(fence);
33
34	return seqno_fence->ops->enable_signaling(fence);
35}
36
37static bool seqno_signaled(struct dma_fence *fence)
38{
39	struct seqno_fence *seqno_fence = to_seqno_fence(fence);
40
41	return seqno_fence->ops->signaled && seqno_fence->ops->signaled(fence);
42}
43
44static void seqno_release(struct dma_fence *fence)
45{
46	struct seqno_fence *f = to_seqno_fence(fence);
47
48	dma_buf_put(f->sync_buf);
49	if (f->ops->release)
50		f->ops->release(fence);
51	else
52		dma_fence_free(&f->base);
53}
54
55static signed long seqno_wait(struct dma_fence *fence, bool intr,
56			      signed long timeout)
57{
58	struct seqno_fence *f = to_seqno_fence(fence);
59
60	return f->ops->wait(fence, intr, timeout);
61}
62
63const struct dma_fence_ops seqno_fence_ops = {
64	.get_driver_name = seqno_fence_get_driver_name,
65	.get_timeline_name = seqno_fence_get_timeline_name,
66	.enable_signaling = seqno_enable_signaling,
67	.signaled = seqno_signaled,
68	.wait = seqno_wait,
69	.release = seqno_release,
70};
71EXPORT_SYMBOL(seqno_fence_ops);
72