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
|
/*
* cx18 buffer queues
*
* Derived from ivtv-queue.h
*
* Copyright (C) 2007 Hans Verkuil <hverkuil@xs4all.nl>
* Copyright (C) 2008 Andy Walls <awalls@radix.net>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
* 02111-1307 USA
*/
#define CX18_DMA_UNMAPPED ((u32) -1)
/* cx18_buffer utility functions */
static inline void cx18_buf_sync_for_cpu(struct cx18_stream *s,
struct cx18_buffer *buf)
{
pci_dma_sync_single_for_cpu(s->cx->pci_dev, buf->dma_handle,
s->buf_size, s->dma);
}
static inline void cx18_buf_sync_for_device(struct cx18_stream *s,
struct cx18_buffer *buf)
{
pci_dma_sync_single_for_device(s->cx->pci_dev, buf->dma_handle,
s->buf_size, s->dma);
}
void _cx18_mdl_sync_for_device(struct cx18_stream *s, struct cx18_mdl *mdl);
static inline void cx18_mdl_sync_for_device(struct cx18_stream *s,
struct cx18_mdl *mdl)
{
if (list_is_singular(&mdl->buf_list))
cx18_buf_sync_for_device(s, list_first_entry(&mdl->buf_list,
struct cx18_buffer,
list));
else
_cx18_mdl_sync_for_device(s, mdl);
}
void cx18_buf_swap(struct cx18_buffer *buf);
void _cx18_mdl_swap(struct cx18_mdl *mdl);
static inline void cx18_mdl_swap(struct cx18_mdl *mdl)
{
if (list_is_singular(&mdl->buf_list))
cx18_buf_swap(list_first_entry(&mdl->buf_list,
struct cx18_buffer, list));
else
_cx18_mdl_swap(mdl);
}
/* cx18_queue utility functions */
struct cx18_queue *_cx18_enqueue(struct cx18_stream *s, struct cx18_mdl *mdl,
struct cx18_queue *q, int to_front);
static inline
struct cx18_queue *cx18_enqueue(struct cx18_stream *s, struct cx18_mdl *mdl,
struct cx18_queue *q)
{
return _cx18_enqueue(s, mdl, q, 0); /* FIFO */
}
static inline
struct cx18_queue *cx18_push(struct cx18_stream *s, struct cx18_mdl *mdl,
struct cx18_queue *q)
{
return _cx18_enqueue(s, mdl, q, 1); /* LIFO */
}
void cx18_queue_init(struct cx18_queue *q);
struct cx18_mdl *cx18_dequeue(struct cx18_stream *s, struct cx18_queue *q);
struct cx18_mdl *cx18_queue_get_mdl(struct cx18_stream *s, u32 id,
u32 bytesused);
void cx18_flush_queues(struct cx18_stream *s);
/* queue MDL reconfiguration helpers */
void cx18_unload_queues(struct cx18_stream *s);
void cx18_load_queues(struct cx18_stream *s);
/* cx18_stream utility functions */
int cx18_stream_alloc(struct cx18_stream *s);
void cx18_stream_free(struct cx18_stream *s);
|
