tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Copyright 2015 Advanced Micro Devices, Inc.
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20 * OTHER DEALINGS IN THE SOFTWARE.
21 *
22 *
23 */
24#include <linux/kthread.h>
25#include <linux/wait.h>
26#include <linux/sched.h>
27#include <drm/drmP.h>
28#include "gpu_scheduler.h"
29
30struct amd_sched_fence *amd_sched_fence_create(struct amd_sched_entity *s_entity, void *owner)
31{
32 struct amd_sched_fence *fence = NULL;
33 unsigned seq;
34
35 fence = kzalloc(sizeof(struct amd_sched_fence), GFP_KERNEL);
36 if (fence == NULL)
37 return NULL;
38 fence->owner = owner;
39 fence->scheduler = s_entity->scheduler;
40 spin_lock_init(&fence->lock);
41
42 seq = atomic_inc_return(&s_entity->fence_seq);
43 fence_init(&fence->base, &amd_sched_fence_ops, &fence->lock,
44 s_entity->fence_context, seq);
45
46 return fence;
47}
48
49void amd_sched_fence_signal(struct amd_sched_fence *fence)
50{
51 int ret = fence_signal(&fence->base);
52 if (!ret)
53 FENCE_TRACE(&fence->base, "signaled from irq context\n");
54 else
55 FENCE_TRACE(&fence->base, "was already signaled\n");
56}
57
58static const char *amd_sched_fence_get_driver_name(struct fence *fence)
59{
60 return "amd_sched";
61}
62
63static const char *amd_sched_fence_get_timeline_name(struct fence *f)
64{
65 struct amd_sched_fence *fence = to_amd_sched_fence(f);
66 return (const char *)fence->scheduler->name;
67}
68
69static bool amd_sched_fence_enable_signaling(struct fence *f)
70{
71 return true;
72}
73
74const struct fence_ops amd_sched_fence_ops = {
75 .get_driver_name = amd_sched_fence_get_driver_name,
76 .get_timeline_name = amd_sched_fence_get_timeline_name,
77 .enable_signaling = amd_sched_fence_enable_signaling,
78 .signaled = NULL,
79 .wait = fence_default_wait,
80 .release = NULL,
81};