1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-only
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * seqno-fence, using a dma-buf to synchronize fencing
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Copyright (C) 2012 Texas Instruments
6*4882a593Smuzhiyun * Copyright (C) 2012-2014 Canonical Ltd
7*4882a593Smuzhiyun * Authors:
8*4882a593Smuzhiyun * Rob Clark <robdclark@gmail.com>
9*4882a593Smuzhiyun * Maarten Lankhorst <maarten.lankhorst@canonical.com>
10*4882a593Smuzhiyun */
11*4882a593Smuzhiyun
12*4882a593Smuzhiyun #include <linux/slab.h>
13*4882a593Smuzhiyun #include <linux/export.h>
14*4882a593Smuzhiyun #include <linux/seqno-fence.h>
15*4882a593Smuzhiyun
seqno_fence_get_driver_name(struct dma_fence * fence)16*4882a593Smuzhiyun static const char *seqno_fence_get_driver_name(struct dma_fence *fence)
17*4882a593Smuzhiyun {
18*4882a593Smuzhiyun struct seqno_fence *seqno_fence = to_seqno_fence(fence);
19*4882a593Smuzhiyun
20*4882a593Smuzhiyun return seqno_fence->ops->get_driver_name(fence);
21*4882a593Smuzhiyun }
22*4882a593Smuzhiyun
seqno_fence_get_timeline_name(struct dma_fence * fence)23*4882a593Smuzhiyun static const char *seqno_fence_get_timeline_name(struct dma_fence *fence)
24*4882a593Smuzhiyun {
25*4882a593Smuzhiyun struct seqno_fence *seqno_fence = to_seqno_fence(fence);
26*4882a593Smuzhiyun
27*4882a593Smuzhiyun return seqno_fence->ops->get_timeline_name(fence);
28*4882a593Smuzhiyun }
29*4882a593Smuzhiyun
seqno_enable_signaling(struct dma_fence * fence)30*4882a593Smuzhiyun static bool seqno_enable_signaling(struct dma_fence *fence)
31*4882a593Smuzhiyun {
32*4882a593Smuzhiyun struct seqno_fence *seqno_fence = to_seqno_fence(fence);
33*4882a593Smuzhiyun
34*4882a593Smuzhiyun return seqno_fence->ops->enable_signaling(fence);
35*4882a593Smuzhiyun }
36*4882a593Smuzhiyun
seqno_signaled(struct dma_fence * fence)37*4882a593Smuzhiyun static bool seqno_signaled(struct dma_fence *fence)
38*4882a593Smuzhiyun {
39*4882a593Smuzhiyun struct seqno_fence *seqno_fence = to_seqno_fence(fence);
40*4882a593Smuzhiyun
41*4882a593Smuzhiyun return seqno_fence->ops->signaled && seqno_fence->ops->signaled(fence);
42*4882a593Smuzhiyun }
43*4882a593Smuzhiyun
seqno_release(struct dma_fence * fence)44*4882a593Smuzhiyun static void seqno_release(struct dma_fence *fence)
45*4882a593Smuzhiyun {
46*4882a593Smuzhiyun struct seqno_fence *f = to_seqno_fence(fence);
47*4882a593Smuzhiyun
48*4882a593Smuzhiyun dma_buf_put(f->sync_buf);
49*4882a593Smuzhiyun if (f->ops->release)
50*4882a593Smuzhiyun f->ops->release(fence);
51*4882a593Smuzhiyun else
52*4882a593Smuzhiyun dma_fence_free(&f->base);
53*4882a593Smuzhiyun }
54*4882a593Smuzhiyun
seqno_wait(struct dma_fence * fence,bool intr,signed long timeout)55*4882a593Smuzhiyun static signed long seqno_wait(struct dma_fence *fence, bool intr,
56*4882a593Smuzhiyun signed long timeout)
57*4882a593Smuzhiyun {
58*4882a593Smuzhiyun struct seqno_fence *f = to_seqno_fence(fence);
59*4882a593Smuzhiyun
60*4882a593Smuzhiyun return f->ops->wait(fence, intr, timeout);
61*4882a593Smuzhiyun }
62*4882a593Smuzhiyun
63*4882a593Smuzhiyun const struct dma_fence_ops seqno_fence_ops = {
64*4882a593Smuzhiyun .get_driver_name = seqno_fence_get_driver_name,
65*4882a593Smuzhiyun .get_timeline_name = seqno_fence_get_timeline_name,
66*4882a593Smuzhiyun .enable_signaling = seqno_enable_signaling,
67*4882a593Smuzhiyun .signaled = seqno_signaled,
68*4882a593Smuzhiyun .wait = seqno_wait,
69*4882a593Smuzhiyun .release = seqno_release,
70*4882a593Smuzhiyun };
71*4882a593Smuzhiyun EXPORT_SYMBOL(seqno_fence_ops);
72