1 /* $NetBSD: nouveau_nvkm_engine_sw_chan.c,v 1.3 2021/12/18 23:45:37 riastradh Exp $ */
2
3 /*
4 * Copyright 2015 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 <bskeggs@redhat.com>
25 */
26 #include <sys/cdefs.h>
27 __KERNEL_RCSID(0, "$NetBSD: nouveau_nvkm_engine_sw_chan.c,v 1.3 2021/12/18 23:45:37 riastradh Exp $");
28
29 #include "chan.h"
30
31 #include <core/notify.h>
32 #include <engine/fifo.h>
33
34 #include <nvif/event.h>
35 #include <nvif/unpack.h>
36
37 bool
nvkm_sw_chan_mthd(struct nvkm_sw_chan * chan,int subc,u32 mthd,u32 data)38 nvkm_sw_chan_mthd(struct nvkm_sw_chan *chan, int subc, u32 mthd, u32 data)
39 {
40 switch (mthd) {
41 case 0x0000:
42 return true;
43 case 0x0500:
44 nvkm_event_send(&chan->event, 1, 0, NULL, 0);
45 return true;
46 default:
47 if (chan->func->mthd)
48 return chan->func->mthd(chan, subc, mthd, data);
49 break;
50 }
51 return false;
52 }
53
54 static int
nvkm_sw_chan_event_ctor(struct nvkm_object * object,void * data,u32 size,struct nvkm_notify * notify)55 nvkm_sw_chan_event_ctor(struct nvkm_object *object, void *data, u32 size,
56 struct nvkm_notify *notify)
57 {
58 union {
59 struct nvif_notify_uevent_req none;
60 } *req = data;
61 int ret = -ENOSYS;
62
63 if (!(ret = nvif_unvers(ret, &data, &size, req->none))) {
64 notify->size = sizeof(struct nvif_notify_uevent_rep);
65 notify->types = 1;
66 notify->index = 0;
67 }
68
69 return ret;
70 }
71
72 static const struct nvkm_event_func
73 nvkm_sw_chan_event = {
74 .ctor = nvkm_sw_chan_event_ctor,
75 };
76
77 static void *
nvkm_sw_chan_dtor(struct nvkm_object * object)78 nvkm_sw_chan_dtor(struct nvkm_object *object)
79 {
80 struct nvkm_sw_chan *chan = nvkm_sw_chan(object);
81 struct nvkm_sw *sw = chan->sw;
82 unsigned long flags;
83 void *data = chan;
84
85 if (chan->func->dtor)
86 data = chan->func->dtor(chan);
87 nvkm_event_fini(&chan->event);
88
89 spin_lock_irqsave(&sw->engine.lock, flags);
90 list_del(&chan->head);
91 spin_unlock_irqrestore(&sw->engine.lock, flags);
92 return data;
93 }
94
95 static const struct nvkm_object_func
96 nvkm_sw_chan = {
97 .dtor = nvkm_sw_chan_dtor,
98 };
99
100 int
nvkm_sw_chan_ctor(const struct nvkm_sw_chan_func * func,struct nvkm_sw * sw,struct nvkm_fifo_chan * fifo,const struct nvkm_oclass * oclass,struct nvkm_sw_chan * chan)101 nvkm_sw_chan_ctor(const struct nvkm_sw_chan_func *func, struct nvkm_sw *sw,
102 struct nvkm_fifo_chan *fifo, const struct nvkm_oclass *oclass,
103 struct nvkm_sw_chan *chan)
104 {
105 unsigned long flags;
106
107 nvkm_object_ctor(&nvkm_sw_chan, oclass, &chan->object);
108 chan->func = func;
109 chan->sw = sw;
110 chan->fifo = fifo;
111 spin_lock_irqsave(&sw->engine.lock, flags);
112 list_add(&chan->head, &sw->chan);
113 spin_unlock_irqrestore(&sw->engine.lock, flags);
114
115 return nvkm_event_init(&nvkm_sw_chan_event, 1, 1, &chan->event);
116 }
117