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 "amdgpu.h"
29 
30 static struct fence *amdgpu_sched_dependency(struct amd_sched_job *sched_job)
31 {
32 	struct amdgpu_job *job = to_amdgpu_job(sched_job);
33 	return amdgpu_sync_get_fence(&job->ibs->sync);
34 }
35 
36 static struct fence *amdgpu_sched_run_job(struct amd_sched_job *sched_job)
37 {
38 	struct amdgpu_fence *fence = NULL;
39 	struct amdgpu_job *job;
40 	int r;
41 
42 	if (!sched_job) {
43 		DRM_ERROR("job is null\n");
44 		return NULL;
45 	}
46 	job = to_amdgpu_job(sched_job);
47 	mutex_lock(&job->job_lock);
48 	r = amdgpu_ib_schedule(job->adev,
49 			       job->num_ibs,
50 			       job->ibs,
51 			       job->base.owner);
52 	if (r) {
53 		DRM_ERROR("Error scheduling IBs (%d)\n", r);
54 		goto err;
55 	}
56 
57 	fence = amdgpu_fence_ref(job->ibs[job->num_ibs - 1].fence);
58 
59 err:
60 	if (job->free_job)
61 		job->free_job(job);
62 
63 	mutex_unlock(&job->job_lock);
64 	fence_put(&job->base.s_fence->base);
65 	kfree(job);
66 	return fence ? &fence->base : NULL;
67 }
68 
69 struct amd_sched_backend_ops amdgpu_sched_ops = {
70 	.dependency = amdgpu_sched_dependency,
71 	.run_job = amdgpu_sched_run_job,
72 };
73 
74 int amdgpu_sched_ib_submit_kernel_helper(struct amdgpu_device *adev,
75 					 struct amdgpu_ring *ring,
76 					 struct amdgpu_ib *ibs,
77 					 unsigned num_ibs,
78 					 int (*free_job)(struct amdgpu_job *),
79 					 void *owner,
80 					 struct fence **f)
81 {
82 	int r = 0;
83 	if (amdgpu_enable_scheduler) {
84 		struct amdgpu_job *job =
85 			kzalloc(sizeof(struct amdgpu_job), GFP_KERNEL);
86 		if (!job)
87 			return -ENOMEM;
88 		job->base.sched = &ring->sched;
89 		job->base.s_entity = &adev->kernel_ctx.rings[ring->idx].entity;
90 		job->adev = adev;
91 		job->ibs = ibs;
92 		job->num_ibs = num_ibs;
93 		job->base.owner = owner;
94 		mutex_init(&job->job_lock);
95 		job->free_job = free_job;
96 		mutex_lock(&job->job_lock);
97 		r = amd_sched_entity_push_job(&job->base);
98 		if (r) {
99 			mutex_unlock(&job->job_lock);
100 			kfree(job);
101 			return r;
102 		}
103 		*f = fence_get(&job->base.s_fence->base);
104 		mutex_unlock(&job->job_lock);
105 	} else {
106 		r = amdgpu_ib_schedule(adev, num_ibs, ibs, owner);
107 		if (r)
108 			return r;
109 		*f = fence_get(&ibs[num_ibs - 1].fence->base);
110 	}
111 
112 	return 0;
113 }
114