1 /* $NetBSD: nouveau_nvkm_core_engine.c,v 1.5 2021/12/19 11:34:44 riastradh Exp $ */
2
3 /*
4 * Copyright 2012 Red Hat Inc.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 * OTHER DEALINGS IN THE SOFTWARE.
23 *
24 * Authors: Ben Skeggs
25 */
26 #include <sys/cdefs.h>
27 __KERNEL_RCSID(0, "$NetBSD: nouveau_nvkm_core_engine.c,v 1.5 2021/12/19 11:34:44 riastradh Exp $");
28
29 #include <core/engine.h>
30 #include <core/device.h>
31 #include <core/option.h>
32
33 #include <subdev/fb.h>
34
35 bool
nvkm_engine_chsw_load(struct nvkm_engine * engine)36 nvkm_engine_chsw_load(struct nvkm_engine *engine)
37 {
38 if (engine->func->chsw_load)
39 return engine->func->chsw_load(engine);
40 return false;
41 }
42
43 void
nvkm_engine_unref(struct nvkm_engine ** pengine)44 nvkm_engine_unref(struct nvkm_engine **pengine)
45 {
46 struct nvkm_engine *engine = *pengine;
47 if (engine) {
48 mutex_lock(&engine->subdev.mutex);
49 if (--engine->usecount == 0)
50 nvkm_subdev_fini(&engine->subdev, false);
51 mutex_unlock(&engine->subdev.mutex);
52 *pengine = NULL;
53 }
54 }
55
56 struct nvkm_engine *
nvkm_engine_ref(struct nvkm_engine * engine)57 nvkm_engine_ref(struct nvkm_engine *engine)
58 {
59 if (engine) {
60 mutex_lock(&engine->subdev.mutex);
61 if (++engine->usecount == 1) {
62 int ret = nvkm_subdev_init(&engine->subdev);
63 if (ret) {
64 engine->usecount--;
65 mutex_unlock(&engine->subdev.mutex);
66 return ERR_PTR(ret);
67 }
68 }
69 mutex_unlock(&engine->subdev.mutex);
70 }
71 return engine;
72 }
73
74 void
nvkm_engine_tile(struct nvkm_engine * engine,int region)75 nvkm_engine_tile(struct nvkm_engine *engine, int region)
76 {
77 struct nvkm_fb *fb = engine->subdev.device->fb;
78 if (engine->func->tile)
79 engine->func->tile(engine, region, &fb->tile.region[region]);
80 }
81
82 static void
nvkm_engine_intr(struct nvkm_subdev * subdev)83 nvkm_engine_intr(struct nvkm_subdev *subdev)
84 {
85 struct nvkm_engine *engine = nvkm_engine(subdev);
86 if (engine->func->intr)
87 engine->func->intr(engine);
88 }
89
90 static int
nvkm_engine_info(struct nvkm_subdev * subdev,u64 mthd,u64 * data)91 nvkm_engine_info(struct nvkm_subdev *subdev, u64 mthd, u64 *data)
92 {
93 struct nvkm_engine *engine = nvkm_engine(subdev);
94 if (engine->func->info) {
95 if (!IS_ERR((engine = nvkm_engine_ref(engine)))) {
96 int ret = engine->func->info(engine, mthd, data);
97 nvkm_engine_unref(&engine);
98 return ret;
99 }
100 return PTR_ERR(engine);
101 }
102 return -ENOSYS;
103 }
104
105 static int
nvkm_engine_fini(struct nvkm_subdev * subdev,bool suspend)106 nvkm_engine_fini(struct nvkm_subdev *subdev, bool suspend)
107 {
108 struct nvkm_engine *engine = nvkm_engine(subdev);
109 if (engine->func->fini)
110 return engine->func->fini(engine, suspend);
111 return 0;
112 }
113
114 static int
nvkm_engine_init(struct nvkm_subdev * subdev)115 nvkm_engine_init(struct nvkm_subdev *subdev)
116 {
117 struct nvkm_engine *engine = nvkm_engine(subdev);
118 struct nvkm_fb *fb = subdev->device->fb;
119 int ret = 0, i;
120 s64 time;
121
122 if (!engine->usecount) {
123 nvkm_trace(subdev, "init skipped, engine has no users\n");
124 return ret;
125 }
126
127 if (engine->func->oneinit && !engine->subdev.oneinit) {
128 nvkm_trace(subdev, "one-time init running...\n");
129 time = ktime_to_us(ktime_get());
130 ret = engine->func->oneinit(engine);
131 if (ret) {
132 nvkm_trace(subdev, "one-time init failed, %d\n", ret);
133 return ret;
134 }
135
136 engine->subdev.oneinit = true;
137 time = ktime_to_us(ktime_get()) - time;
138 nvkm_trace(subdev, "one-time init completed in %"PRId64"us\n", time);
139 }
140
141 if (engine->func->init)
142 ret = engine->func->init(engine);
143
144 for (i = 0; fb && i < fb->tile.regions; i++)
145 nvkm_engine_tile(engine, i);
146 return ret;
147 }
148
149 static int
nvkm_engine_preinit(struct nvkm_subdev * subdev)150 nvkm_engine_preinit(struct nvkm_subdev *subdev)
151 {
152 struct nvkm_engine *engine = nvkm_engine(subdev);
153 if (engine->func->preinit)
154 engine->func->preinit(engine);
155 return 0;
156 }
157
158 static void *
nvkm_engine_dtor(struct nvkm_subdev * subdev)159 nvkm_engine_dtor(struct nvkm_subdev *subdev)
160 {
161 struct nvkm_engine *engine = nvkm_engine(subdev);
162 spin_lock_destroy(&engine->lock);
163 if (engine->func->dtor)
164 return engine->func->dtor(engine);
165 return engine;
166 }
167
168 static const struct nvkm_subdev_func
169 nvkm_engine_func = {
170 .dtor = nvkm_engine_dtor,
171 .preinit = nvkm_engine_preinit,
172 .init = nvkm_engine_init,
173 .fini = nvkm_engine_fini,
174 .info = nvkm_engine_info,
175 .intr = nvkm_engine_intr,
176 };
177
178 int
nvkm_engine_ctor(const struct nvkm_engine_func * func,struct nvkm_device * device,int index,bool enable,struct nvkm_engine * engine)179 nvkm_engine_ctor(const struct nvkm_engine_func *func,
180 struct nvkm_device *device, int index, bool enable,
181 struct nvkm_engine *engine)
182 {
183 nvkm_subdev_ctor(&nvkm_engine_func, device, index, &engine->subdev);
184 engine->func = func;
185
186 if (!nvkm_boolopt(device->cfgopt, nvkm_subdev_name[index], enable)) {
187 nvkm_debug(&engine->subdev, "disabled\n");
188 return -ENODEV;
189 }
190
191 spin_lock_init(&engine->lock);
192 return 0;
193 }
194
195 int
nvkm_engine_new_(const struct nvkm_engine_func * func,struct nvkm_device * device,int index,bool enable,struct nvkm_engine ** pengine)196 nvkm_engine_new_(const struct nvkm_engine_func *func,
197 struct nvkm_device *device, int index, bool enable,
198 struct nvkm_engine **pengine)
199 {
200 if (!(*pengine = kzalloc(sizeof(**pengine), GFP_KERNEL)))
201 return -ENOMEM;
202 return nvkm_engine_ctor(func, device, index, enable, *pengine);
203 }
204