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
|
/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
buffer queues.
Copyright (C) 2003-2004 Kevin Thayer <nufan_wfk at yahoo.com>
Copyright (C) 2004 Chris Kennedy <c@groovy.org>
Copyright (C) 2005-2007 Hans Verkuil <hverkuil@xs4all.nl>
*/
#ifndef IVTV_QUEUE_H
#define IVTV_QUEUE_H
#define IVTV_DMA_UNMAPPED ((u32) -1)
#define SLICED_VBI_PIO 0
/* ivtv_buffer utility functions */
static inline int ivtv_might_use_pio(struct ivtv_stream *s)
{
return s->dma == PCI_DMA_NONE || (SLICED_VBI_PIO && s->type == IVTV_ENC_STREAM_TYPE_VBI);
}
static inline int ivtv_use_pio(struct ivtv_stream *s)
{
struct ivtv *itv = s->itv;
return s->dma == PCI_DMA_NONE ||
(SLICED_VBI_PIO && s->type == IVTV_ENC_STREAM_TYPE_VBI && itv->vbi.sliced_in->service_set);
}
static inline int ivtv_might_use_dma(struct ivtv_stream *s)
{
return s->dma != PCI_DMA_NONE;
}
static inline int ivtv_use_dma(struct ivtv_stream *s)
{
return !ivtv_use_pio(s);
}
static inline void ivtv_buf_sync_for_cpu(struct ivtv_stream *s, struct ivtv_buffer *buf)
{
if (ivtv_use_dma(s))
pci_dma_sync_single_for_cpu(s->itv->pdev, buf->dma_handle,
s->buf_size + 256, s->dma);
}
static inline void ivtv_buf_sync_for_device(struct ivtv_stream *s, struct ivtv_buffer *buf)
{
if (ivtv_use_dma(s))
pci_dma_sync_single_for_device(s->itv->pdev, buf->dma_handle,
s->buf_size + 256, s->dma);
}
int ivtv_buf_copy_from_user(struct ivtv_stream *s, struct ivtv_buffer *buf, const char __user *src, int copybytes);
void ivtv_buf_swap(struct ivtv_buffer *buf);
/* ivtv_queue utility functions */
void ivtv_queue_init(struct ivtv_queue *q);
void ivtv_enqueue(struct ivtv_stream *s, struct ivtv_buffer *buf, struct ivtv_queue *q);
struct ivtv_buffer *ivtv_dequeue(struct ivtv_stream *s, struct ivtv_queue *q);
int ivtv_queue_move(struct ivtv_stream *s, struct ivtv_queue *from, struct ivtv_queue *steal,
struct ivtv_queue *to, int needed_bytes);
void ivtv_flush_queues(struct ivtv_stream *s);
/* ivtv_stream utility functions */
int ivtv_stream_alloc(struct ivtv_stream *s);
void ivtv_stream_free(struct ivtv_stream *s);
static inline void ivtv_stream_sync_for_cpu(struct ivtv_stream *s)
{
if (ivtv_use_dma(s))
pci_dma_sync_single_for_cpu(s->itv->pdev, s->sg_handle,
sizeof(struct ivtv_sg_element), PCI_DMA_TODEVICE);
}
static inline void ivtv_stream_sync_for_device(struct ivtv_stream *s)
{
if (ivtv_use_dma(s))
pci_dma_sync_single_for_device(s->itv->pdev, s->sg_handle,
sizeof(struct ivtv_sg_element), PCI_DMA_TODEVICE);
}
#endif
|
