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/fdtable.h>
26 #include <linux/file.h>
27 #include <linux/pid.h>
28 
29 #include <drm/amdgpu_drm.h>
30 
31 #include "amdgpu.h"
32 #include "amdgpu_sched.h"
33 #include "amdgpu_vm.h"
34 
35 static int amdgpu_sched_process_priority_override(struct amdgpu_device *adev,
36 						  int fd,
37 						  int32_t priority)
38 {
39 	struct fd f = fdget(fd);
40 	struct amdgpu_fpriv *fpriv;
41 	struct amdgpu_ctx_mgr *mgr;
42 	struct amdgpu_ctx *ctx;
43 	uint32_t id;
44 	int r;
45 
46 	if (!f.file)
47 		return -EINVAL;
48 
49 	r = amdgpu_file_to_fpriv(f.file, &fpriv);
50 	if (r) {
51 		fdput(f);
52 		return r;
53 	}
54 
55 	mgr = &fpriv->ctx_mgr;
56 	mutex_lock(&mgr->lock);
57 	idr_for_each_entry(&mgr->ctx_handles, ctx, id)
58 		amdgpu_ctx_priority_override(ctx, priority);
59 	mutex_unlock(&mgr->lock);
60 
61 	fdput(f);
62 	return 0;
63 }
64 
65 static int amdgpu_sched_context_priority_override(struct amdgpu_device *adev,
66 						  int fd,
67 						  unsigned ctx_id,
68 						  int32_t priority)
69 {
70 	struct fd f = fdget(fd);
71 	struct amdgpu_fpriv *fpriv;
72 	struct amdgpu_ctx *ctx;
73 	int r;
74 
75 	if (!f.file)
76 		return -EINVAL;
77 
78 	r = amdgpu_file_to_fpriv(f.file, &fpriv);
79 	if (r) {
80 		fdput(f);
81 		return r;
82 	}
83 
84 	ctx = amdgpu_ctx_get(fpriv, ctx_id);
85 
86 	if (!ctx) {
87 		fdput(f);
88 		return -EINVAL;
89 	}
90 
91 	amdgpu_ctx_priority_override(ctx, priority);
92 	amdgpu_ctx_put(ctx);
93 	fdput(f);
94 
95 	return 0;
96 }
97 
98 int amdgpu_sched_ioctl(struct drm_device *dev, void *data,
99 		       struct drm_file *filp)
100 {
101 	union drm_amdgpu_sched *args = data;
102 	struct amdgpu_device *adev = drm_to_adev(dev);
103 	int r;
104 
105 	/* First check the op, then the op's argument.
106 	 */
107 	switch (args->in.op) {
108 	case AMDGPU_SCHED_OP_PROCESS_PRIORITY_OVERRIDE:
109 	case AMDGPU_SCHED_OP_CONTEXT_PRIORITY_OVERRIDE:
110 		break;
111 	default:
112 		DRM_ERROR("Invalid sched op specified: %d\n", args->in.op);
113 		return -EINVAL;
114 	}
115 
116 	if (!amdgpu_ctx_priority_is_valid(args->in.priority)) {
117 		WARN(1, "Invalid context priority %d\n", args->in.priority);
118 		return -EINVAL;
119 	}
120 
121 	switch (args->in.op) {
122 	case AMDGPU_SCHED_OP_PROCESS_PRIORITY_OVERRIDE:
123 		r = amdgpu_sched_process_priority_override(adev,
124 							   args->in.fd,
125 							   args->in.priority);
126 		break;
127 	case AMDGPU_SCHED_OP_CONTEXT_PRIORITY_OVERRIDE:
128 		r = amdgpu_sched_context_priority_override(adev,
129 							   args->in.fd,
130 							   args->in.ctx_id,
131 							   args->in.priority);
132 		break;
133 	default:
134 		/* Impossible.
135 		 */
136 		r = -EINVAL;
137 		break;
138 	}
139 
140 	return r;
141 }
142