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 
34 struct nv04_sw_chan {
35 	struct nvkm_sw_chan base;
36 	atomic_t ref;
37 };
38 
39 /*******************************************************************************
40  * software object classes
41  ******************************************************************************/
42 
43 static int
44 nv04_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 
59 static int
60 nv04_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 
71 static const struct nvkm_nvsw_func
72 nv04_nvsw = {
73 	.mthd = nv04_nvsw_mthd,
74 };
75 
76 static int
77 nv04_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 
87 static bool
88 nv04_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 
103 static const struct nvkm_sw_chan_func
104 nv04_sw_chan = {
105 	.mthd = nv04_sw_chan_mthd,
106 };
107 
108 static int
109 nv04_sw_chan_new(struct nvkm_sw *sw, struct nvkm_fifo_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 
126 static const struct nvkm_sw_func
127 nv04_sw = {
128 	.chan_new = nv04_sw_chan_new,
129 	.sclass = {
130 		{ nv04_nvsw_new, { -1, -1, NVIF_CLASS_SW_NV04 } },
131 		{}
132 	}
133 };
134 
135 int
136 nv04_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