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