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
seqno_fence_get_driver_name(struct dma_fence * fence)16 static 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
seqno_fence_get_timeline_name(struct dma_fence * fence)23 static 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
seqno_enable_signaling(struct dma_fence * fence)30 static 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
seqno_signaled(struct dma_fence * fence)37 static 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
seqno_release(struct dma_fence * fence)44 static 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
seqno_wait(struct dma_fence * fence,bool intr,signed long timeout)55 static 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
63 const 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 };
71 EXPORT_SYMBOL(seqno_fence_ops);
72
