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> | |
1ed9dcc8 | 7 | * Copyright (C) 2008 Andy Walls <awalls@radix.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. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program; if not, write to the Free Software | |
21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | |
22 | * 02111-1307 USA | |
23 | */ | |
24 | ||
25 | #define CX18_DMA_UNMAPPED ((u32) -1) | |
26 | ||
27 | /* cx18_buffer utility functions */ | |
28 | ||
29 | static inline void cx18_buf_sync_for_cpu(struct cx18_stream *s, | |
30 | struct cx18_buffer *buf) | |
31 | { | |
3d05913d | 32 | pci_dma_sync_single_for_cpu(s->cx->pci_dev, buf->dma_handle, |
1c1e45d1 HV |
33 | s->buf_size, s->dma); |
34 | } | |
35 | ||
36 | static inline void cx18_buf_sync_for_device(struct cx18_stream *s, | |
37 | struct cx18_buffer *buf) | |
38 | { | |
3d05913d | 39 | pci_dma_sync_single_for_device(s->cx->pci_dev, buf->dma_handle, |
1c1e45d1 HV |
40 | s->buf_size, s->dma); |
41 | } | |
42 | ||
52fcb3ec AW |
43 | void _cx18_mdl_sync_for_device(struct cx18_stream *s, struct cx18_mdl *mdl); |
44 | ||
45 | static inline void cx18_mdl_sync_for_device(struct cx18_stream *s, | |
46 | struct cx18_mdl *mdl) | |
47 | { | |
48 | if (list_is_singular(&mdl->buf_list)) | |
49 | cx18_buf_sync_for_device(s, list_first_entry(&mdl->buf_list, | |
50 | struct cx18_buffer, | |
51 | list)); | |
52 | else | |
53 | _cx18_mdl_sync_for_device(s, mdl); | |
54 | } | |
55 | ||
1c1e45d1 | 56 | void cx18_buf_swap(struct cx18_buffer *buf); |
52fcb3ec AW |
57 | void _cx18_mdl_swap(struct cx18_mdl *mdl); |
58 | ||
59 | static inline void cx18_mdl_swap(struct cx18_mdl *mdl) | |
60 | { | |
61 | if (list_is_singular(&mdl->buf_list)) | |
62 | cx18_buf_swap(list_first_entry(&mdl->buf_list, | |
63 | struct cx18_buffer, list)); | |
64 | else | |
65 | _cx18_mdl_swap(mdl); | |
66 | } | |
1c1e45d1 HV |
67 | |
68 | /* cx18_queue utility functions */ | |
52fcb3ec | 69 | struct cx18_queue *_cx18_enqueue(struct cx18_stream *s, struct cx18_mdl *mdl, |
66c2a6b0 | 70 | struct cx18_queue *q, int to_front); |
b80e1074 AW |
71 | |
72 | static inline | |
52fcb3ec | 73 | struct cx18_queue *cx18_enqueue(struct cx18_stream *s, struct cx18_mdl *mdl, |
66c2a6b0 | 74 | struct cx18_queue *q) |
b80e1074 | 75 | { |
52fcb3ec | 76 | return _cx18_enqueue(s, mdl, q, 0); /* FIFO */ |
b80e1074 AW |
77 | } |
78 | ||
79 | static inline | |
52fcb3ec | 80 | struct cx18_queue *cx18_push(struct cx18_stream *s, struct cx18_mdl *mdl, |
66c2a6b0 | 81 | struct cx18_queue *q) |
b80e1074 | 82 | { |
52fcb3ec | 83 | return _cx18_enqueue(s, mdl, q, 1); /* LIFO */ |
b80e1074 AW |
84 | } |
85 | ||
86 | void cx18_queue_init(struct cx18_queue *q); | |
52fcb3ec AW |
87 | struct cx18_mdl *cx18_dequeue(struct cx18_stream *s, struct cx18_queue *q); |
88 | struct cx18_mdl *cx18_queue_get_mdl(struct cx18_stream *s, u32 id, | |
1c1e45d1 HV |
89 | u32 bytesused); |
90 | void cx18_flush_queues(struct cx18_stream *s); | |
91 | ||
52fcb3ec AW |
92 | /* queue MDL reconfiguration helpers */ |
93 | void cx18_unload_queues(struct cx18_stream *s); | |
94 | void cx18_load_queues(struct cx18_stream *s); | |
95 | ||
1c1e45d1 HV |
96 | /* cx18_stream utility functions */ |
97 | int cx18_stream_alloc(struct cx18_stream *s); | |
98 | void cx18_stream_free(struct cx18_stream *s); |