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 
29 bool
30 nvkm_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 
49 static int
50 nvkm_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 
58 static int
59 nvkm_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 
76 static int
77 nvkm_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 
85 static void *
86 nvkm_sw_dtor(struct nvkm_engine *engine)
87 {
88 	return nvkm_sw(engine);
89 }
90 
91 static const struct nvkm_engine_func
92 nvkm_sw = {
93 	.dtor = nvkm_sw_dtor,
94 	.fifo.cclass = nvkm_sw_cclass_get,
95 	.fifo.sclass = nvkm_sw_oclass_get,
96 };
97 
98 int
99 nvkm_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, true, &sw->engine);
110 }
111