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engine.c
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1 /*
2  * Copyright 2012 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  * Authors: Ben Skeggs
23  */
24 
25 #include <core/device.h>
26 #include <core/engine.h>
27 #include <core/option.h>
28 
29 int
31  struct nouveau_object *engobj,
32  struct nouveau_oclass *oclass, bool enable,
33  const char *iname, const char *fname,
34  int length, void **pobject)
35 {
36  struct nouveau_device *device = nv_device(parent);
37  struct nouveau_engine *engine;
38  int ret;
39 
40  ret = nouveau_subdev_create_(parent, engobj, oclass, NV_ENGINE_CLASS,
41  iname, fname, length, pobject);
42  engine = *pobject;
43  if (ret)
44  return ret;
45 
46  if (!nouveau_boolopt(device->cfgopt, iname, enable)) {
47  if (!enable)
48  nv_warn(engine, "disabled, %s=1 to enable\n", iname);
49  return -ENODEV;
50  }
51 
52  INIT_LIST_HEAD(&engine->contexts);
53  spin_lock_init(&engine->lock);
54  return 0;
55 }