Loading...
1/* SPDX-License-Identifier: GPL-2.0-or-later */
2/*
3 buffer queues.
4 Copyright (C) 2003-2004 Kevin Thayer <nufan_wfk at yahoo.com>
5 Copyright (C) 2004 Chris Kennedy <c@groovy.org>
6 Copyright (C) 2005-2007 Hans Verkuil <hverkuil@xs4all.nl>
7
8 */
9
10#ifndef IVTV_QUEUE_H
11#define IVTV_QUEUE_H
12
13#define IVTV_DMA_UNMAPPED ((u32) -1)
14#define SLICED_VBI_PIO 0
15
16/* ivtv_buffer utility functions */
17
18static inline int ivtv_might_use_pio(struct ivtv_stream *s)
19{
20 return s->dma == PCI_DMA_NONE || (SLICED_VBI_PIO && s->type == IVTV_ENC_STREAM_TYPE_VBI);
21}
22
23static inline int ivtv_use_pio(struct ivtv_stream *s)
24{
25 struct ivtv *itv = s->itv;
26
27 return s->dma == PCI_DMA_NONE ||
28 (SLICED_VBI_PIO && s->type == IVTV_ENC_STREAM_TYPE_VBI && itv->vbi.sliced_in->service_set);
29}
30
31static inline int ivtv_might_use_dma(struct ivtv_stream *s)
32{
33 return s->dma != PCI_DMA_NONE;
34}
35
36static inline int ivtv_use_dma(struct ivtv_stream *s)
37{
38 return !ivtv_use_pio(s);
39}
40
41static inline void ivtv_buf_sync_for_cpu(struct ivtv_stream *s, struct ivtv_buffer *buf)
42{
43 if (ivtv_use_dma(s))
44 pci_dma_sync_single_for_cpu(s->itv->pdev, buf->dma_handle,
45 s->buf_size + 256, s->dma);
46}
47
48static inline void ivtv_buf_sync_for_device(struct ivtv_stream *s, struct ivtv_buffer *buf)
49{
50 if (ivtv_use_dma(s))
51 pci_dma_sync_single_for_device(s->itv->pdev, buf->dma_handle,
52 s->buf_size + 256, s->dma);
53}
54
55int ivtv_buf_copy_from_user(struct ivtv_stream *s, struct ivtv_buffer *buf, const char __user *src, int copybytes);
56void ivtv_buf_swap(struct ivtv_buffer *buf);
57
58/* ivtv_queue utility functions */
59void ivtv_queue_init(struct ivtv_queue *q);
60void ivtv_enqueue(struct ivtv_stream *s, struct ivtv_buffer *buf, struct ivtv_queue *q);
61struct ivtv_buffer *ivtv_dequeue(struct ivtv_stream *s, struct ivtv_queue *q);
62int ivtv_queue_move(struct ivtv_stream *s, struct ivtv_queue *from, struct ivtv_queue *steal,
63 struct ivtv_queue *to, int needed_bytes);
64void ivtv_flush_queues(struct ivtv_stream *s);
65
66/* ivtv_stream utility functions */
67int ivtv_stream_alloc(struct ivtv_stream *s);
68void ivtv_stream_free(struct ivtv_stream *s);
69
70static inline void ivtv_stream_sync_for_cpu(struct ivtv_stream *s)
71{
72 if (ivtv_use_dma(s))
73 pci_dma_sync_single_for_cpu(s->itv->pdev, s->sg_handle,
74 sizeof(struct ivtv_sg_element), PCI_DMA_TODEVICE);
75}
76
77static inline void ivtv_stream_sync_for_device(struct ivtv_stream *s)
78{
79 if (ivtv_use_dma(s))
80 pci_dma_sync_single_for_device(s->itv->pdev, s->sg_handle,
81 sizeof(struct ivtv_sg_element), PCI_DMA_TODEVICE);
82}
83
84#endif
1/*
2 buffer queues.
3 Copyright (C) 2003-2004 Kevin Thayer <nufan_wfk at yahoo.com>
4 Copyright (C) 2004 Chris Kennedy <c@groovy.org>
5 Copyright (C) 2005-2007 Hans Verkuil <hverkuil@xs4all.nl>
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 */
21
22#ifndef IVTV_QUEUE_H
23#define IVTV_QUEUE_H
24
25#define IVTV_DMA_UNMAPPED ((u32) -1)
26#define SLICED_VBI_PIO 0
27
28/* ivtv_buffer utility functions */
29
30static inline int ivtv_might_use_pio(struct ivtv_stream *s)
31{
32 return s->dma == PCI_DMA_NONE || (SLICED_VBI_PIO && s->type == IVTV_ENC_STREAM_TYPE_VBI);
33}
34
35static inline int ivtv_use_pio(struct ivtv_stream *s)
36{
37 struct ivtv *itv = s->itv;
38
39 return s->dma == PCI_DMA_NONE ||
40 (SLICED_VBI_PIO && s->type == IVTV_ENC_STREAM_TYPE_VBI && itv->vbi.sliced_in->service_set);
41}
42
43static inline int ivtv_might_use_dma(struct ivtv_stream *s)
44{
45 return s->dma != PCI_DMA_NONE;
46}
47
48static inline int ivtv_use_dma(struct ivtv_stream *s)
49{
50 return !ivtv_use_pio(s);
51}
52
53static inline void ivtv_buf_sync_for_cpu(struct ivtv_stream *s, struct ivtv_buffer *buf)
54{
55 if (ivtv_use_dma(s))
56 pci_dma_sync_single_for_cpu(s->itv->pdev, buf->dma_handle,
57 s->buf_size + 256, s->dma);
58}
59
60static inline void ivtv_buf_sync_for_device(struct ivtv_stream *s, struct ivtv_buffer *buf)
61{
62 if (ivtv_use_dma(s))
63 pci_dma_sync_single_for_device(s->itv->pdev, buf->dma_handle,
64 s->buf_size + 256, s->dma);
65}
66
67int ivtv_buf_copy_from_user(struct ivtv_stream *s, struct ivtv_buffer *buf, const char __user *src, int copybytes);
68void ivtv_buf_swap(struct ivtv_buffer *buf);
69
70/* ivtv_queue utility functions */
71void ivtv_queue_init(struct ivtv_queue *q);
72void ivtv_enqueue(struct ivtv_stream *s, struct ivtv_buffer *buf, struct ivtv_queue *q);
73struct ivtv_buffer *ivtv_dequeue(struct ivtv_stream *s, struct ivtv_queue *q);
74int ivtv_queue_move(struct ivtv_stream *s, struct ivtv_queue *from, struct ivtv_queue *steal,
75 struct ivtv_queue *to, int needed_bytes);
76void ivtv_flush_queues(struct ivtv_stream *s);
77
78/* ivtv_stream utility functions */
79int ivtv_stream_alloc(struct ivtv_stream *s);
80void ivtv_stream_free(struct ivtv_stream *s);
81
82static inline void ivtv_stream_sync_for_cpu(struct ivtv_stream *s)
83{
84 if (ivtv_use_dma(s))
85 pci_dma_sync_single_for_cpu(s->itv->pdev, s->sg_handle,
86 sizeof(struct ivtv_sg_element), PCI_DMA_TODEVICE);
87}
88
89static inline void ivtv_stream_sync_for_device(struct ivtv_stream *s)
90{
91 if (ivtv_use_dma(s))
92 pci_dma_sync_single_for_device(s->itv->pdev, s->sg_handle,
93 sizeof(struct ivtv_sg_element), PCI_DMA_TODEVICE);
94}
95
96#endif