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Commit | Line | Data |
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1c1e45d1 HV |
1 | /* |
2 | * cx18 buffer queues | |
3 | * | |
4 | * Derived from ivtv-queue.h | |
5 | * | |
6 | * Copyright (C) 2007 Hans Verkuil <hverkuil@xs4all.nl> | |
6afdeaf8 | 7 | * Copyright (C) 2008 Andy Walls <awalls@md.metrocast.net> |
1c1e45d1 HV |
8 | * |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or | |
12 | * (at your option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
1c1e45d1 HV |
18 | */ |
19 | ||
20 | #define CX18_DMA_UNMAPPED ((u32) -1) | |
21 | ||
22 | /* cx18_buffer utility functions */ | |
23 | ||
24 | static inline void cx18_buf_sync_for_cpu(struct cx18_stream *s, | |
25 | struct cx18_buffer *buf) | |
26 | { | |
3d05913d | 27 | pci_dma_sync_single_for_cpu(s->cx->pci_dev, buf->dma_handle, |
1c1e45d1 HV |
28 | s->buf_size, s->dma); |
29 | } | |
30 | ||
31 | static inline void cx18_buf_sync_for_device(struct cx18_stream *s, | |
32 | struct cx18_buffer *buf) | |
33 | { | |
3d05913d | 34 | pci_dma_sync_single_for_device(s->cx->pci_dev, buf->dma_handle, |
1c1e45d1 HV |
35 | s->buf_size, s->dma); |
36 | } | |
37 | ||
52fcb3ec AW |
38 | void _cx18_mdl_sync_for_device(struct cx18_stream *s, struct cx18_mdl *mdl); |
39 | ||
40 | static inline void cx18_mdl_sync_for_device(struct cx18_stream *s, | |
41 | struct cx18_mdl *mdl) | |
42 | { | |
43 | if (list_is_singular(&mdl->buf_list)) | |
44 | cx18_buf_sync_for_device(s, list_first_entry(&mdl->buf_list, | |
45 | struct cx18_buffer, | |
46 | list)); | |
47 | else | |
48 | _cx18_mdl_sync_for_device(s, mdl); | |
49 | } | |
50 | ||
1c1e45d1 | 51 | void cx18_buf_swap(struct cx18_buffer *buf); |
52fcb3ec AW |
52 | void _cx18_mdl_swap(struct cx18_mdl *mdl); |
53 | ||
54 | static inline void cx18_mdl_swap(struct cx18_mdl *mdl) | |
55 | { | |
56 | if (list_is_singular(&mdl->buf_list)) | |
57 | cx18_buf_swap(list_first_entry(&mdl->buf_list, | |
58 | struct cx18_buffer, list)); | |
59 | else | |
60 | _cx18_mdl_swap(mdl); | |
61 | } | |
1c1e45d1 HV |
62 | |
63 | /* cx18_queue utility functions */ | |
52fcb3ec | 64 | struct cx18_queue *_cx18_enqueue(struct cx18_stream *s, struct cx18_mdl *mdl, |
66c2a6b0 | 65 | struct cx18_queue *q, int to_front); |
b80e1074 AW |
66 | |
67 | static inline | |
52fcb3ec | 68 | struct cx18_queue *cx18_enqueue(struct cx18_stream *s, struct cx18_mdl *mdl, |
66c2a6b0 | 69 | struct cx18_queue *q) |
b80e1074 | 70 | { |
52fcb3ec | 71 | return _cx18_enqueue(s, mdl, q, 0); /* FIFO */ |
b80e1074 AW |
72 | } |
73 | ||
74 | static inline | |
52fcb3ec | 75 | struct cx18_queue *cx18_push(struct cx18_stream *s, struct cx18_mdl *mdl, |
66c2a6b0 | 76 | struct cx18_queue *q) |
b80e1074 | 77 | { |
52fcb3ec | 78 | return _cx18_enqueue(s, mdl, q, 1); /* LIFO */ |
b80e1074 AW |
79 | } |
80 | ||
81 | void cx18_queue_init(struct cx18_queue *q); | |
52fcb3ec AW |
82 | struct cx18_mdl *cx18_dequeue(struct cx18_stream *s, struct cx18_queue *q); |
83 | struct cx18_mdl *cx18_queue_get_mdl(struct cx18_stream *s, u32 id, | |
1c1e45d1 HV |
84 | u32 bytesused); |
85 | void cx18_flush_queues(struct cx18_stream *s); | |
86 | ||
52fcb3ec AW |
87 | /* queue MDL reconfiguration helpers */ |
88 | void cx18_unload_queues(struct cx18_stream *s); | |
89 | void cx18_load_queues(struct cx18_stream *s); | |
90 | ||
1c1e45d1 HV |
91 | /* cx18_stream utility functions */ |
92 | int cx18_stream_alloc(struct cx18_stream *s); | |
93 | void cx18_stream_free(struct cx18_stream *s); |