1 /* $NetBSD: nouveau_nvkm_engine_sw_nv04.c,v 1.3 2021/12/18 23:45:37 riastradh Exp $ */
2
3 /*
4 * Copyright 2012 Red Hat Inc.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 * OTHER DEALINGS IN THE SOFTWARE.
23 *
24 * Authors: Ben Skeggs
25 */
26 #include <sys/cdefs.h>
27 __KERNEL_RCSID(0, "$NetBSD: nouveau_nvkm_engine_sw_nv04.c,v 1.3 2021/12/18 23:45:37 riastradh Exp $");
28
29 #define nv04_sw_chan(p) container_of((p), struct nv04_sw_chan, base)
30 #include "priv.h"
31 #include "chan.h"
32 #include "nvsw.h"
33
34 #include <nvif/class.h>
35 #include <nvif/if0004.h>
36 #include <nvif/ioctl.h>
37 #include <nvif/unpack.h>
38
39 struct nv04_sw_chan {
40 struct nvkm_sw_chan base;
41 atomic_t ref;
42 };
43
44 /*******************************************************************************
45 * software object classes
46 ******************************************************************************/
47
48 static int
nv04_nvsw_mthd_get_ref(struct nvkm_nvsw * nvsw,void * data,u32 size)49 nv04_nvsw_mthd_get_ref(struct nvkm_nvsw *nvsw, void *data, u32 size)
50 {
51 struct nv04_sw_chan *chan = nv04_sw_chan(nvsw->chan);
52 union {
53 struct nv04_nvsw_get_ref_v0 v0;
54 } *args = data;
55 int ret = -ENOSYS;
56
57 if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, false))) {
58 args->v0.ref = atomic_read(&chan->ref);
59 }
60
61 return ret;
62 }
63
64 static int
nv04_nvsw_mthd(struct nvkm_nvsw * nvsw,u32 mthd,void * data,u32 size)65 nv04_nvsw_mthd(struct nvkm_nvsw *nvsw, u32 mthd, void *data, u32 size)
66 {
67 switch (mthd) {
68 case NV04_NVSW_GET_REF:
69 return nv04_nvsw_mthd_get_ref(nvsw, data, size);
70 default:
71 break;
72 }
73 return -EINVAL;
74 }
75
76 static const struct nvkm_nvsw_func
77 nv04_nvsw = {
78 .mthd = nv04_nvsw_mthd,
79 };
80
81 static int
nv04_nvsw_new(struct nvkm_sw_chan * chan,const struct nvkm_oclass * oclass,void * data,u32 size,struct nvkm_object ** pobject)82 nv04_nvsw_new(struct nvkm_sw_chan *chan, const struct nvkm_oclass *oclass,
83 void *data, u32 size, struct nvkm_object **pobject)
84 {
85 return nvkm_nvsw_new_(&nv04_nvsw, chan, oclass, data, size, pobject);
86 }
87
88 /*******************************************************************************
89 * software context
90 ******************************************************************************/
91
92 static bool
nv04_sw_chan_mthd(struct nvkm_sw_chan * base,int subc,u32 mthd,u32 data)93 nv04_sw_chan_mthd(struct nvkm_sw_chan *base, int subc, u32 mthd, u32 data)
94 {
95 struct nv04_sw_chan *chan = nv04_sw_chan(base);
96
97 switch (mthd) {
98 case 0x0150:
99 atomic_set(&chan->ref, data);
100 return true;
101 default:
102 break;
103 }
104
105 return false;
106 }
107
108 static const struct nvkm_sw_chan_func
109 nv04_sw_chan = {
110 .mthd = nv04_sw_chan_mthd,
111 };
112
113 static int
nv04_sw_chan_new(struct nvkm_sw * sw,struct nvkm_fifo_chan * fifo,const struct nvkm_oclass * oclass,struct nvkm_object ** pobject)114 nv04_sw_chan_new(struct nvkm_sw *sw, struct nvkm_fifo_chan *fifo,
115 const struct nvkm_oclass *oclass, struct nvkm_object **pobject)
116 {
117 struct nv04_sw_chan *chan;
118
119 if (!(chan = kzalloc(sizeof(*chan), GFP_KERNEL)))
120 return -ENOMEM;
121 atomic_set(&chan->ref, 0);
122 *pobject = &chan->base.object;
123
124 return nvkm_sw_chan_ctor(&nv04_sw_chan, sw, fifo, oclass, &chan->base);
125 }
126
127 /*******************************************************************************
128 * software engine/subdev functions
129 ******************************************************************************/
130
131 static const struct nvkm_sw_func
132 nv04_sw = {
133 .chan_new = nv04_sw_chan_new,
134 .sclass = {
135 { nv04_nvsw_new, { -1, -1, NVIF_CLASS_SW_NV04 } },
136 {}
137 }
138 };
139
140 int
nv04_sw_new(struct nvkm_device * device,int index,struct nvkm_sw ** psw)141 nv04_sw_new(struct nvkm_device *device, int index, struct nvkm_sw **psw)
142 {
143 return nvkm_sw_new_(&nv04_sw, device, index, psw);
144 }
145