1 /*
2  * Copyright 2015 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 <bskeggs@redhat.com>
23  */
24 #include "priv.h"
25 
26 #include <engine/fifo.h>
27 
28 static int
29 nvkm_gr_oclass_get(struct nvkm_oclass *oclass, int index)
30 {
31 	struct nvkm_gr *gr = nvkm_gr(oclass->engine);
32 	int c = 0;
33 
34 	if (gr->func->object_get) {
35 		int ret = gr->func->object_get(gr, index, &oclass->base);
36 		if (oclass->base.oclass)
37 			return index;
38 		return ret;
39 	}
40 
41 	while (gr->func->sclass[c].oclass) {
42 		if (c++ == index) {
43 			oclass->base = gr->func->sclass[index];
44 			return index;
45 		}
46 	}
47 
48 	return c;
49 }
50 
51 static int
52 nvkm_gr_cclass_new(struct nvkm_fifo_chan *chan,
53 		   const struct nvkm_oclass *oclass,
54 		   struct nvkm_object **pobject)
55 {
56 	struct nvkm_gr *gr = nvkm_gr(oclass->engine);
57 	if (gr->func->chan_new)
58 		return gr->func->chan_new(gr, chan, oclass, pobject);
59 	return 0;
60 }
61 
62 struct nvkm_engine_func
63 nvkm_gr = {
64 	.fifo.cclass = nvkm_gr_cclass_new,
65 	.fifo.sclass = nvkm_gr_oclass_get,
66 };
67 
68 int
69 nvkm_gr_create_(struct nvkm_object *parent, struct nvkm_object *engine,
70 		struct nvkm_oclass *oclass, bool enable,
71 		int length, void **pobject)
72 {
73 	struct nvkm_gr *gr;
74 	int ret;
75 
76 	ret = nvkm_engine_create_(parent, engine, oclass, enable,
77 				  "gr", "gr", length, pobject);
78 	gr = *pobject;
79 	if (ret)
80 		return ret;
81 
82 	gr->engine.func = &nvkm_gr;
83 	return 0;
84 }
85