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