base.c revision 0c5b8cecf34d6b25e577475cc5e8c7169d63ba92 
1/*
2 * Copyright 2012 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
23 */
24
25#include <core/object.h>
26#include <core/handle.h>
27
28#include <engine/dmaobj.h>
29#include <engine/fifo.h>
30
31int
32nouveau_fifo_channel_create_(struct nouveau_object *parent,
33			     struct nouveau_object *engine,
34			     struct nouveau_oclass *oclass,
35			     int bar, u32 addr, u32 size, u32 pushbuf,
36			     u32 engmask, int len, void **ptr)
37{
38	struct nouveau_device *device = nv_device(engine);
39	struct nouveau_fifo *priv = (void *)engine;
40	struct nouveau_fifo_chan *chan;
41	struct nouveau_dmaeng *dmaeng;
42	unsigned long flags;
43	int ret;
44
45	/* create base object class */
46	ret = nouveau_namedb_create_(parent, engine, oclass, 0, NULL,
47				     engmask, len, ptr);
48	chan = *ptr;
49	if (ret)
50		return ret;
51
52	/* validate dma object representing push buffer */
53	chan->pushdma = (void *)nouveau_handle_ref(parent, pushbuf);
54	if (!chan->pushdma)
55		return -ENOENT;
56
57	dmaeng = (void *)chan->pushdma->base.engine;
58	switch (chan->pushdma->base.oclass->handle) {
59	case 0x0002:
60	case 0x003d:
61		break;
62	default:
63		return -EINVAL;
64	}
65
66	if (dmaeng->bind) {
67		ret = dmaeng->bind(dmaeng, parent, chan->pushdma, &chan->pushgpu);
68		if (ret)
69			return ret;
70	}
71
72	/* find a free fifo channel */
73	spin_lock_irqsave(&priv->lock, flags);
74	for (chan->chid = priv->min; chan->chid < priv->max; chan->chid++) {
75		if (!priv->channel[chan->chid]) {
76			priv->channel[chan->chid] = nv_object(chan);
77			break;
78		}
79	}
80	spin_unlock_irqrestore(&priv->lock, flags);
81
82	if (chan->chid == priv->max) {
83		nv_error(priv, "no free channels\n");
84		return -ENOSPC;
85	}
86
87	/* map fifo control registers */
88	chan->user = ioremap(pci_resource_start(device->pdev, bar) + addr +
89			     (chan->chid * size), size);
90	if (!chan->user)
91		return -EFAULT;
92
93	chan->size = size;
94	return 0;
95}
96
97void
98nouveau_fifo_channel_destroy(struct nouveau_fifo_chan *chan)
99{
100	struct nouveau_fifo *priv = (void *)nv_object(chan)->engine;
101	unsigned long flags;
102
103	iounmap(chan->user);
104
105	spin_lock_irqsave(&priv->lock, flags);
106	priv->channel[chan->chid] = NULL;
107	spin_unlock_irqrestore(&priv->lock, flags);
108
109	nouveau_gpuobj_ref(NULL, &chan->pushgpu);
110	nouveau_object_ref(NULL, (struct nouveau_object **)&chan->pushdma);
111	nouveau_namedb_destroy(&chan->base);
112}
113
114void
115_nouveau_fifo_channel_dtor(struct nouveau_object *object)
116{
117	struct nouveau_fifo_chan *chan = (void *)object;
118	nouveau_fifo_channel_destroy(chan);
119}
120
121u32
122_nouveau_fifo_channel_rd32(struct nouveau_object *object, u32 addr)
123{
124	struct nouveau_fifo_chan *chan = (void *)object;
125	return ioread32_native(chan->user + addr);
126}
127
128void
129_nouveau_fifo_channel_wr32(struct nouveau_object *object, u32 addr, u32 data)
130{
131	struct nouveau_fifo_chan *chan = (void *)object;
132	iowrite32_native(data, chan->user + addr);
133}
134
135int
136nouveau_fifo_chid(struct nouveau_fifo *priv, struct nouveau_object *object)
137{
138	int engidx = nv_hclass(priv) & 0xff;
139
140	while (object && object->parent) {
141		if ( nv_iclass(object->parent, NV_ENGCTX_CLASS) &&
142		    (nv_hclass(object->parent) & 0xff) == engidx)
143			return nouveau_fifo_chan(object)->chid;
144		object = object->parent;
145	}
146
147	return -1;
148}
149
150void
151nouveau_fifo_destroy(struct nouveau_fifo *priv)
152{
153	kfree(priv->channel);
154	nouveau_engine_destroy(&priv->base);
155}
156
157int
158nouveau_fifo_create_(struct nouveau_object *parent,
159		     struct nouveau_object *engine,
160		     struct nouveau_oclass *oclass,
161		     int min, int max, int length, void **pobject)
162{
163	struct nouveau_fifo *priv;
164	int ret;
165
166	ret = nouveau_engine_create_(parent, engine, oclass, true, "PFIFO",
167				     "fifo", length, pobject);
168	priv = *pobject;
169	if (ret)
170		return ret;
171
172	priv->min = min;
173	priv->max = max;
174	priv->channel = kzalloc(sizeof(*priv->channel) * (max + 1), GFP_KERNEL);
175	if (!priv->channel)
176		return -ENOMEM;
177
178	priv->chid = nouveau_fifo_chid;
179	spin_lock_init(&priv->lock);
180	return 0;
181}
182