1/*
2 * Copyright 2017 Valve Corporation
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 * Authors: Andres Rodriguez <andresx7@gmail.com>
23 */
24
25#include <linux/file.h>
26#include <linux/pid.h>
27
28#include <drm/amdgpu_drm.h>
29
30#include "amdgpu.h"
31#include "amdgpu_sched.h"
32#include "amdgpu_vm.h"
33
34static int amdgpu_sched_process_priority_override(struct amdgpu_device *adev,
35 int fd,
36 int32_t priority)
37{
38 CLASS(fd, f)(fd);
39 struct amdgpu_fpriv *fpriv;
40 struct amdgpu_ctx_mgr *mgr;
41 struct amdgpu_ctx *ctx;
42 uint32_t id;
43 int r;
44
45 if (fd_empty(f))
46 return -EINVAL;
47
48 r = amdgpu_file_to_fpriv(fd_file(f), fpriv: &fpriv);
49 if (r)
50 return r;
51
52 mgr = &fpriv->ctx_mgr;
53 mutex_lock(&mgr->lock);
54 idr_for_each_entry(&mgr->ctx_handles, ctx, id)
55 amdgpu_ctx_priority_override(ctx, ctx_prio: priority);
56 mutex_unlock(lock: &mgr->lock);
57
58 return 0;
59}
60
61static int amdgpu_sched_context_priority_override(struct amdgpu_device *adev,
62 int fd,
63 unsigned ctx_id,
64 int32_t priority)
65{
66 CLASS(fd, f)(fd);
67 struct amdgpu_fpriv *fpriv;
68 struct amdgpu_ctx *ctx;
69 int r;
70
71 if (fd_empty(f))
72 return -EINVAL;
73
74 r = amdgpu_file_to_fpriv(fd_file(f), fpriv: &fpriv);
75 if (r)
76 return r;
77
78 ctx = amdgpu_ctx_get(fpriv, id: ctx_id);
79
80 if (!ctx)
81 return -EINVAL;
82
83 amdgpu_ctx_priority_override(ctx, ctx_prio: priority);
84 amdgpu_ctx_put(ctx);
85 return 0;
86}
87
88int amdgpu_sched_ioctl(struct drm_device *dev, void *data,
89 struct drm_file *filp)
90{
91 union drm_amdgpu_sched *args = data;
92 struct amdgpu_device *adev = drm_to_adev(ddev: dev);
93 int r;
94
95 /* First check the op, then the op's argument.
96 */
97 switch (args->in.op) {
98 case AMDGPU_SCHED_OP_PROCESS_PRIORITY_OVERRIDE:
99 case AMDGPU_SCHED_OP_CONTEXT_PRIORITY_OVERRIDE:
100 break;
101 default:
102 DRM_ERROR("Invalid sched op specified: %d\n", args->in.op);
103 return -EINVAL;
104 }
105
106 if (!amdgpu_ctx_priority_is_valid(ctx_prio: args->in.priority)) {
107 WARN(1, "Invalid context priority %d\n", args->in.priority);
108 return -EINVAL;
109 }
110
111 switch (args->in.op) {
112 case AMDGPU_SCHED_OP_PROCESS_PRIORITY_OVERRIDE:
113 r = amdgpu_sched_process_priority_override(adev,
114 fd: args->in.fd,
115 priority: args->in.priority);
116 break;
117 case AMDGPU_SCHED_OP_CONTEXT_PRIORITY_OVERRIDE:
118 r = amdgpu_sched_context_priority_override(adev,
119 fd: args->in.fd,
120 ctx_id: args->in.ctx_id,
121 priority: args->in.priority);
122 break;
123 default:
124 /* Impossible.
125 */
126 r = -EINVAL;
127 break;
128 }
129
130 return r;
131}
132

source code of linux/drivers/gpu/drm/amd/amdgpu/amdgpu_sched.c