1 /*
2 * Copyright 2021 Red Hat 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 #define nvkm_uoutp(p) container_of((p), struct nvkm_outp, object)
23 #include "outp.h"
24 #include "ior.h"
25
26 #include <nvif/if0012.h>
27
28 static int
nvkm_uoutp_mthd_load_detect(struct nvkm_outp * outp,void * argv,u32 argc)29 nvkm_uoutp_mthd_load_detect(struct nvkm_outp *outp, void *argv, u32 argc)
30 {
31 union nvif_outp_load_detect_args *args = argv;
32 int ret;
33
34 if (argc != sizeof(args->v0) || args->v0.version != 0)
35 return -ENOSYS;
36
37 ret = nvkm_outp_acquire(outp, NVKM_OUTP_PRIV, false);
38 if (ret == 0) {
39 if (outp->ior->func->sense) {
40 ret = outp->ior->func->sense(outp->ior, args->v0.data);
41 args->v0.load = ret < 0 ? 0 : ret;
42 } else {
43 ret = -EINVAL;
44 }
45 nvkm_outp_release(outp, NVKM_OUTP_PRIV);
46 }
47
48 return ret;
49 }
50
51 static int
nvkm_uoutp_mthd_noacquire(struct nvkm_outp * outp,u32 mthd,void * argv,u32 argc)52 nvkm_uoutp_mthd_noacquire(struct nvkm_outp *outp, u32 mthd, void *argv, u32 argc)
53 {
54 switch (mthd) {
55 case NVIF_OUTP_V0_LOAD_DETECT: return nvkm_uoutp_mthd_load_detect(outp, argv, argc);
56 default:
57 break;
58 }
59
60 return 1;
61 }
62
63 static int
nvkm_uoutp_mthd(struct nvkm_object * object,u32 mthd,void * argv,u32 argc)64 nvkm_uoutp_mthd(struct nvkm_object *object, u32 mthd, void *argv, u32 argc)
65 {
66 struct nvkm_outp *outp = nvkm_uoutp(object);
67 struct nvkm_disp *disp = outp->disp;
68 int ret;
69
70 mutex_lock(&disp->super.mutex);
71
72 ret = nvkm_uoutp_mthd_noacquire(outp, mthd, argv, argc);
73 if (ret <= 0)
74 goto done;
75
76 done:
77 mutex_unlock(&disp->super.mutex);
78 return ret;
79 }
80
81 static void *
nvkm_uoutp_dtor(struct nvkm_object * object)82 nvkm_uoutp_dtor(struct nvkm_object *object)
83 {
84 struct nvkm_outp *outp = nvkm_uoutp(object);
85 struct nvkm_disp *disp = outp->disp;
86
87 spin_lock(&disp->client.lock);
88 outp->object.func = NULL;
89 spin_unlock(&disp->client.lock);
90 return NULL;
91 }
92
93 static const struct nvkm_object_func
94 nvkm_uoutp = {
95 .dtor = nvkm_uoutp_dtor,
96 .mthd = nvkm_uoutp_mthd,
97 };
98
99 int
nvkm_uoutp_new(const struct nvkm_oclass * oclass,void * argv,u32 argc,struct nvkm_object ** pobject)100 nvkm_uoutp_new(const struct nvkm_oclass *oclass, void *argv, u32 argc, struct nvkm_object **pobject)
101 {
102 struct nvkm_disp *disp = nvkm_udisp(oclass->parent);
103 struct nvkm_outp *outt, *outp = NULL;
104 union nvif_outp_args *args = argv;
105 int ret;
106
107 if (argc != sizeof(args->v0) || args->v0.version != 0)
108 return -ENOSYS;
109
110 list_for_each_entry(outt, &disp->outps, head) {
111 if (outt->index == args->v0.id) {
112 outp = outt;
113 break;
114 }
115 }
116
117 if (!outp)
118 return -EINVAL;
119
120 ret = -EBUSY;
121 spin_lock(&disp->client.lock);
122 if (!outp->object.func) {
123 nvkm_object_ctor(&nvkm_uoutp, oclass, &outp->object);
124 *pobject = &outp->object;
125 ret = 0;
126 }
127 spin_unlock(&disp->client.lock);
128 return ret;
129 }
130
