4 * Derived from ivtv-queue.h
6 * Copyright (C) 2007 Hans Verkuil <hverkuil@xs4all.nl>
7 * Copyright (C) 2008 Andy Walls <awalls@radix.net>
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.
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.
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
25 #define CX18_DMA_UNMAPPED ((u32) -1)
27 /* cx18_buffer utility functions */
29 static inline void cx18_buf_sync_for_cpu(struct cx18_stream
*s
,
30 struct cx18_buffer
*buf
)
32 pci_dma_sync_single_for_cpu(s
->cx
->pci_dev
, buf
->dma_handle
,
36 static inline void cx18_buf_sync_for_device(struct cx18_stream
*s
,
37 struct cx18_buffer
*buf
)
39 pci_dma_sync_single_for_device(s
->cx
->pci_dev
, buf
->dma_handle
,
43 void cx18_buf_swap(struct cx18_buffer
*buf
);
45 /* cx18_queue utility functions */
46 struct cx18_queue
*_cx18_enqueue(struct cx18_stream
*s
, struct cx18_buffer
*buf
,
47 struct cx18_queue
*q
, int to_front
);
50 struct cx18_queue
*cx18_enqueue(struct cx18_stream
*s
, struct cx18_buffer
*buf
,
53 return _cx18_enqueue(s
, buf
, q
, 0); /* FIFO */
57 struct cx18_queue
*cx18_push(struct cx18_stream
*s
, struct cx18_buffer
*buf
,
60 return _cx18_enqueue(s
, buf
, q
, 1); /* LIFO */
63 void cx18_queue_init(struct cx18_queue
*q
);
64 struct cx18_buffer
*cx18_dequeue(struct cx18_stream
*s
, struct cx18_queue
*q
);
65 struct cx18_buffer
*cx18_queue_get_buf(struct cx18_stream
*s
, u32 id
,
67 void cx18_flush_queues(struct cx18_stream
*s
);
69 /* cx18_stream utility functions */
70 int cx18_stream_alloc(struct cx18_stream
*s
);
71 void cx18_stream_free(struct cx18_stream
*s
);