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#include <core/engine.h>
25#include <core/device.h>
26#include <core/option.h>
27
28struct nvkm_engine *
29nvkm_engine(void *obj, int idx)
30{
31	obj = nvkm_subdev(obj, idx);
32	if (obj && nv_iclass(obj, NV_ENGINE_CLASS))
33		return nv_engine(obj);
34	return NULL;
35}
36
37int
38nvkm_engine_create_(struct nvkm_object *parent, struct nvkm_object *engobj,
39		    struct nvkm_oclass *oclass, bool enable,
40		    const char *iname, const char *fname,
41		    int length, void **pobject)
42{
43	struct nvkm_engine *engine;
44	int ret;
45
46	ret = nvkm_subdev_create_(parent, engobj, oclass, NV_ENGINE_CLASS,
47				  iname, fname, length, pobject);
48	engine = *pobject;
49	if (ret)
50		return ret;
51
52	if (parent) {
53		struct nvkm_device *device = nv_device(parent);
54		int engidx = nv_engidx(engine);
55
56		if (device->disable_mask & (1ULL << engidx)) {
57			if (!nvkm_boolopt(device->cfgopt, iname, false)) {
58				nv_debug(engine, "engine disabled by hw/fw\n");
59				return -ENODEV;
60			}
61
62			nv_warn(engine, "ignoring hw/fw engine disable\n");
63		}
64
65		if (!nvkm_boolopt(device->cfgopt, iname, enable)) {
66			if (!enable)
67				nv_warn(engine, "disabled, %s=1 to enable\n", iname);
68			return -ENODEV;
69		}
70	}
71
72	INIT_LIST_HEAD(&engine->contexts);
73	spin_lock_init(&engine->lock);
74	return 0;
75}
76