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 "priv.h"
25#include "chan.h"
26
27#include <engine/fifo.h>
28
29bool
30nvkm_sw_mthd(struct nvkm_sw *sw, int chid, int subc, u32 mthd, u32 data)
31{
32	struct nvkm_sw_chan *chan;
33	bool handled = false;
34	unsigned long flags;
35
36	spin_lock_irqsave(&sw->engine.lock, flags);
37	list_for_each_entry(chan, &sw->chan, head) {
38		if (chan->fifo->chid == chid) {
39			handled = nvkm_sw_chan_mthd(chan, subc, mthd, data);
40			list_del(&chan->head);
41			list_add(&chan->head, &sw->chan);
42			break;
43		}
44	}
45	spin_unlock_irqrestore(&sw->engine.lock, flags);
46	return handled;
47}
48
49static int
50nvkm_sw_oclass_new(const struct nvkm_oclass *oclass, void *data, u32 size,
51		   struct nvkm_object **pobject)
52{
53	struct nvkm_sw_chan *chan = nvkm_sw_chan(oclass->parent);
54	const struct nvkm_sw_chan_sclass *sclass = oclass->engn;
55	return sclass->ctor(chan, oclass, data, size, pobject);
56}
57
58static int
59nvkm_sw_oclass_get(struct nvkm_oclass *oclass, int index)
60{
61	struct nvkm_sw *sw = nvkm_sw(oclass->engine);
62	int c = 0;
63
64	while (sw->func->sclass[c].ctor) {
65		if (c++ == index) {
66			oclass->engn = &sw->func->sclass[index];
67			oclass->base =  sw->func->sclass[index].base;
68			oclass->base.ctor = nvkm_sw_oclass_new;
69			return index;
70		}
71	}
72
73	return c;
74}
75
76static int
77nvkm_sw_cclass_get(struct nvkm_fifo_chan *fifoch,
78		   const struct nvkm_oclass *oclass,
79		   struct nvkm_object **pobject)
80{
81	struct nvkm_sw *sw = nvkm_sw(oclass->engine);
82	return sw->func->chan_new(sw, fifoch, oclass, pobject);
83}
84
85static void *
86nvkm_sw_dtor(struct nvkm_engine *engine)
87{
88	return nvkm_sw(engine);
89}
90
91static const struct nvkm_engine_func
92nvkm_sw = {
93	.dtor = nvkm_sw_dtor,
94	.fifo.cclass = nvkm_sw_cclass_get,
95	.fifo.sclass = nvkm_sw_oclass_get,
96};
97
98int
99nvkm_sw_new_(const struct nvkm_sw_func *func, struct nvkm_device *device,
100	     int index, struct nvkm_sw **psw)
101{
102	struct nvkm_sw *sw;
103
104	if (!(sw = *psw = kzalloc(sizeof(*sw), GFP_KERNEL)))
105		return -ENOMEM;
106	INIT_LIST_HEAD(&sw->chan);
107	sw->func = func;
108
109	return nvkm_engine_ctor(&nvkm_sw, device, index, 0, true, &sw->engine);
110}
111