1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
|
/*
* Copyright 2012 Red Hat Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*
* Authors: Ben Skeggs
*/
#include <core/client.h>
#include <core/object.h>
#include <core/handle.h>
#include <core/event.h>
#include <core/class.h>
#include <engine/dmaobj.h>
#include <engine/fifo.h>
int
nouveau_fifo_channel_create_(struct nouveau_object *parent,
struct nouveau_object *engine,
struct nouveau_oclass *oclass,
int bar, u32 addr, u32 size, u32 pushbuf,
u64 engmask, int len, void **ptr)
{
struct nouveau_device *device = nv_device(engine);
struct nouveau_fifo *priv = (void *)engine;
struct nouveau_fifo_chan *chan;
struct nouveau_dmaeng *dmaeng;
unsigned long flags;
int ret;
/* create base object class */
ret = nouveau_namedb_create_(parent, engine, oclass, 0, NULL,
engmask, len, ptr);
chan = *ptr;
if (ret)
return ret;
/* validate dma object representing push buffer */
chan->pushdma = (void *)nouveau_handle_ref(parent, pushbuf);
if (!chan->pushdma)
return -ENOENT;
dmaeng = (void *)chan->pushdma->base.engine;
switch (chan->pushdma->base.oclass->handle) {
case NV_DMA_FROM_MEMORY_CLASS:
case NV_DMA_IN_MEMORY_CLASS:
break;
default:
return -EINVAL;
}
ret = dmaeng->bind(dmaeng, parent, chan->pushdma, &chan->pushgpu);
if (ret)
return ret;
/* find a free fifo channel */
spin_lock_irqsave(&priv->lock, flags);
for (chan->chid = priv->min; chan->chid < priv->max; chan->chid++) {
if (!priv->channel[chan->chid]) {
priv->channel[chan->chid] = nv_object(chan);
break;
}
}
spin_unlock_irqrestore(&priv->lock, flags);
if (chan->chid == priv->max) {
nv_error(priv, "no free channels\n");
return -ENOSPC;
}
/* map fifo control registers */
chan->user = ioremap(pci_resource_start(device->pdev, bar) + addr +
(chan->chid * size), size);
if (!chan->user)
return -EFAULT;
nouveau_event_trigger(priv->cevent, 0);
chan->size = size;
return 0;
}
void
nouveau_fifo_channel_destroy(struct nouveau_fifo_chan *chan)
{
struct nouveau_fifo *priv = (void *)nv_object(chan)->engine;
unsigned long flags;
iounmap(chan->user);
spin_lock_irqsave(&priv->lock, flags);
priv->channel[chan->chid] = NULL;
spin_unlock_irqrestore(&priv->lock, flags);
nouveau_gpuobj_ref(NULL, &chan->pushgpu);
nouveau_object_ref(NULL, (struct nouveau_object **)&chan->pushdma);
nouveau_namedb_destroy(&chan->base);
}
void
_nouveau_fifo_channel_dtor(struct nouveau_object *object)
{
struct nouveau_fifo_chan *chan = (void *)object;
nouveau_fifo_channel_destroy(chan);
}
u32
_nouveau_fifo_channel_rd32(struct nouveau_object *object, u64 addr)
{
struct nouveau_fifo_chan *chan = (void *)object;
return ioread32_native(chan->user + addr);
}
void
_nouveau_fifo_channel_wr32(struct nouveau_object *object, u64 addr, u32 data)
{
struct nouveau_fifo_chan *chan = (void *)object;
iowrite32_native(data, chan->user + addr);
}
static int
nouveau_fifo_chid(struct nouveau_fifo *priv, struct nouveau_object *object)
{
int engidx = nv_hclass(priv) & 0xff;
while (object && object->parent) {
if ( nv_iclass(object->parent, NV_ENGCTX_CLASS) &&
(nv_hclass(object->parent) & 0xff) == engidx)
return nouveau_fifo_chan(object)->chid;
object = object->parent;
}
return -1;
}
const char *
nouveau_client_name_for_fifo_chid(struct nouveau_fifo *fifo, u32 chid)
{
struct nouveau_fifo_chan *chan = NULL;
unsigned long flags;
spin_lock_irqsave(&fifo->lock, flags);
if (chid >= fifo->min && chid <= fifo->max)
chan = (void *)fifo->channel[chid];
spin_unlock_irqrestore(&fifo->lock, flags);
return nouveau_client_name(chan);
}
void
nouveau_fifo_destroy(struct nouveau_fifo *priv)
{
kfree(priv->channel);
nouveau_event_destroy(&priv->uevent);
nouveau_event_destroy(&priv->cevent);
nouveau_engine_destroy(&priv->base);
}
int
nouveau_fifo_create_(struct nouveau_object *parent,
struct nouveau_object *engine,
struct nouveau_oclass *oclass,
int min, int max, int length, void **pobject)
{
struct nouveau_fifo *priv;
int ret;
ret = nouveau_engine_create_(parent, engine, oclass, true, "PFIFO",
"fifo", length, pobject);
priv = *pobject;
if (ret)
return ret;
priv->min = min;
priv->max = max;
priv->channel = kzalloc(sizeof(*priv->channel) * (max + 1), GFP_KERNEL);
if (!priv->channel)
return -ENOMEM;
ret = nouveau_event_create(1, &priv->cevent);
if (ret)
return ret;
ret = nouveau_event_create(1, &priv->uevent);
if (ret)
return ret;
priv->chid = nouveau_fifo_chid;
spin_lock_init(&priv->lock);
return 0;
}
|