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
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
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 *
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
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