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#define nv04_sw_chan(p) container_of((p), struct nv04_sw_chan, base)
25#include "priv.h"
26#include "chan.h"
27#include "nvsw.h"
28
29#include <nvif/class.h>
30#include <nvif/ioctl.h>
31#include <nvif/unpack.h>
32
33struct nv04_sw_chan {
34	struct nvkm_sw_chan base;
35	atomic_t ref;
36};
37
38/*******************************************************************************
39 * software object classes
40 ******************************************************************************/
41
42static int
43nv04_nvsw_mthd_get_ref(struct nvkm_nvsw *nvsw, void *data, u32 size)
44{
45	struct nv04_sw_chan *chan = nv04_sw_chan(nvsw->chan);
46	union {
47		struct nv04_nvsw_get_ref_v0 v0;
48	} *args = data;
49	int ret;
50
51	if (nvif_unpack(args->v0, 0, 0, false)) {
52		args->v0.ref = atomic_read(&chan->ref);
53	}
54
55	return ret;
56}
57
58static int
59nv04_nvsw_mthd(struct nvkm_nvsw *nvsw, u32 mthd, void *data, u32 size)
60{
61	switch (mthd) {
62	case NV04_NVSW_GET_REF:
63		return nv04_nvsw_mthd_get_ref(nvsw, data, size);
64	default:
65		break;
66	}
67	return -EINVAL;
68}
69
70static const struct nvkm_nvsw_func
71nv04_nvsw = {
72	.mthd = nv04_nvsw_mthd,
73};
74
75static int
76nv04_nvsw_new(struct nvkm_sw_chan *chan, const struct nvkm_oclass *oclass,
77	      void *data, u32 size, struct nvkm_object **pobject)
78{
79	return nvkm_nvsw_new_(&nv04_nvsw, chan, oclass, data, size, pobject);
80}
81
82/*******************************************************************************
83 * software context
84 ******************************************************************************/
85
86static bool
87nv04_sw_chan_mthd(struct nvkm_sw_chan *base, int subc, u32 mthd, u32 data)
88{
89	struct nv04_sw_chan *chan = nv04_sw_chan(base);
90
91	switch (mthd) {
92	case 0x0150:
93		atomic_set(&chan->ref, data);
94		return true;
95	default:
96		break;
97	}
98
99	return false;
100}
101
102static const struct nvkm_sw_chan_func
103nv04_sw_chan = {
104	.mthd = nv04_sw_chan_mthd,
105};
106
107static int
108nv04_sw_chan_new(struct nvkm_sw *sw, struct nvkm_fifo_chan *fifo,
109		 const struct nvkm_oclass *oclass, struct nvkm_object **pobject)
110{
111	struct nv04_sw_chan *chan;
112
113	if (!(chan = kzalloc(sizeof(*chan), GFP_KERNEL)))
114		return -ENOMEM;
115	atomic_set(&chan->ref, 0);
116	*pobject = &chan->base.object;
117
118	return nvkm_sw_chan_ctor(&nv04_sw_chan, sw, fifo, oclass, &chan->base);
119}
120
121/*******************************************************************************
122 * software engine/subdev functions
123 ******************************************************************************/
124
125static const struct nvkm_sw_func
126nv04_sw = {
127	.chan_new = nv04_sw_chan_new,
128	.sclass = {
129		{ nv04_nvsw_new, { -1, -1, NVIF_IOCTL_NEW_V0_SW_NV04 } },
130		{}
131	}
132};
133
134int
135nv04_sw_new(struct nvkm_device *device, int index, struct nvkm_sw **psw)
136{
137	return nvkm_sw_new_(&nv04_sw, device, index, psw);
138}
139