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/if0004.h>
31#include <nvif/ioctl.h>
32#include <nvif/unpack.h>
33
34struct nv04_sw_chan {
35	struct nvkm_sw_chan base;
36	atomic_t ref;
37};
38
39/*******************************************************************************
40 * software object classes
41 ******************************************************************************/
42
43static int
44nv04_nvsw_mthd_get_ref(struct nvkm_nvsw *nvsw, void *data, u32 size)
45{
46	struct nv04_sw_chan *chan = nv04_sw_chan(nvsw->chan);
47	union {
48		struct nv04_nvsw_get_ref_v0 v0;
49	} *args = data;
50	int ret = -ENOSYS;
51
52	if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, false))) {
53		args->v0.ref = atomic_read(&chan->ref);
54	}
55
56	return ret;
57}
58
59static int
60nv04_nvsw_mthd(struct nvkm_nvsw *nvsw, u32 mthd, void *data, u32 size)
61{
62	switch (mthd) {
63	case NV04_NVSW_GET_REF:
64		return nv04_nvsw_mthd_get_ref(nvsw, data, size);
65	default:
66		break;
67	}
68	return -EINVAL;
69}
70
71static const struct nvkm_nvsw_func
72nv04_nvsw = {
73	.mthd = nv04_nvsw_mthd,
74};
75
76static int
77nv04_nvsw_new(struct nvkm_sw_chan *chan, const struct nvkm_oclass *oclass,
78	      void *data, u32 size, struct nvkm_object **pobject)
79{
80	return nvkm_nvsw_new_(&nv04_nvsw, chan, oclass, data, size, pobject);
81}
82
83/*******************************************************************************
84 * software context
85 ******************************************************************************/
86
87static bool
88nv04_sw_chan_mthd(struct nvkm_sw_chan *base, int subc, u32 mthd, u32 data)
89{
90	struct nv04_sw_chan *chan = nv04_sw_chan(base);
91
92	switch (mthd) {
93	case 0x0150:
94		atomic_set(&chan->ref, data);
95		return true;
96	default:
97		break;
98	}
99
100	return false;
101}
102
103static const struct nvkm_sw_chan_func
104nv04_sw_chan = {
105	.mthd = nv04_sw_chan_mthd,
106};
107
108static int
109nv04_sw_chan_new(struct nvkm_sw *sw, struct nvkm_chan *fifo,
110		 const struct nvkm_oclass *oclass, struct nvkm_object **pobject)
111{
112	struct nv04_sw_chan *chan;
113
114	if (!(chan = kzalloc(sizeof(*chan), GFP_KERNEL)))
115		return -ENOMEM;
116	atomic_set(&chan->ref, 0);
117	*pobject = &chan->base.object;
118
119	return nvkm_sw_chan_ctor(&nv04_sw_chan, sw, fifo, oclass, &chan->base);
120}
121
122/*******************************************************************************
123 * software engine/subdev functions
124 ******************************************************************************/
125
126static const struct nvkm_sw_func
127nv04_sw = {
128	.chan_new = nv04_sw_chan_new,
129	.sclass = {
130		{ nv04_nvsw_new, { -1, -1, NVIF_CLASS_SW_NV04 } },
131		{}
132	}
133};
134
135int
136nv04_sw_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst, struct nvkm_sw **psw)
137{
138	return nvkm_sw_new_(&nv04_sw, device, type, inst, psw);
139}
140