1 /* SPDX-License-Identifier: GPL-2.0-or-later */
5 * Derived from ivtv-queue.h
7 * Copyright (C) 2007 Hans Verkuil <hverkuil@xs4all.nl>
8 * Copyright (C) 2008 Andy Walls <awalls@md.metrocast.net>
11 #define CX18_DMA_UNMAPPED ((u32) -1)
13 /* cx18_buffer utility functions */
15 static inline void cx18_buf_sync_for_cpu(struct cx18_stream
*s
,
16 struct cx18_buffer
*buf
)
18 pci_dma_sync_single_for_cpu(s
->cx
->pci_dev
, buf
->dma_handle
,
22 static inline void cx18_buf_sync_for_device(struct cx18_stream
*s
,
23 struct cx18_buffer
*buf
)
25 pci_dma_sync_single_for_device(s
->cx
->pci_dev
, buf
->dma_handle
,
29 void _cx18_mdl_sync_for_device(struct cx18_stream
*s
, struct cx18_mdl
*mdl
);
31 static inline void cx18_mdl_sync_for_device(struct cx18_stream
*s
,
34 if (list_is_singular(&mdl
->buf_list
))
35 cx18_buf_sync_for_device(s
, list_first_entry(&mdl
->buf_list
,
39 _cx18_mdl_sync_for_device(s
, mdl
);
42 void cx18_buf_swap(struct cx18_buffer
*buf
);
43 void _cx18_mdl_swap(struct cx18_mdl
*mdl
);
45 static inline void cx18_mdl_swap(struct cx18_mdl
*mdl
)
47 if (list_is_singular(&mdl
->buf_list
))
48 cx18_buf_swap(list_first_entry(&mdl
->buf_list
,
49 struct cx18_buffer
, list
));
54 /* cx18_queue utility functions */
55 struct cx18_queue
*_cx18_enqueue(struct cx18_stream
*s
, struct cx18_mdl
*mdl
,
56 struct cx18_queue
*q
, int to_front
);
59 struct cx18_queue
*cx18_enqueue(struct cx18_stream
*s
, struct cx18_mdl
*mdl
,
62 return _cx18_enqueue(s
, mdl
, q
, 0); /* FIFO */
66 struct cx18_queue
*cx18_push(struct cx18_stream
*s
, struct cx18_mdl
*mdl
,
69 return _cx18_enqueue(s
, mdl
, q
, 1); /* LIFO */
72 void cx18_queue_init(struct cx18_queue
*q
);
73 struct cx18_mdl
*cx18_dequeue(struct cx18_stream
*s
, struct cx18_queue
*q
);
74 struct cx18_mdl
*cx18_queue_get_mdl(struct cx18_stream
*s
, u32 id
,
76 void cx18_flush_queues(struct cx18_stream
*s
);
78 /* queue MDL reconfiguration helpers */
79 void cx18_unload_queues(struct cx18_stream
*s
);
80 void cx18_load_queues(struct cx18_stream
*s
);
82 /* cx18_stream utility functions */
83 int cx18_stream_alloc(struct cx18_stream
*s
);
84 void cx18_stream_free(struct cx18_stream
*s
);