Contributors: 3
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Andy Walls |
230 |
57.50% |
4 |
66.67% |
| Hans Verkuil |
168 |
42.00% |
1 |
16.67% |
| Thomas Gleixner |
2 |
0.50% |
1 |
16.67% |
| Total |
400 |
|
6 |
|
/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* cx18 buffer queues
*
* Derived from ivtv-queue.h
*
* Copyright (C) 2007 Hans Verkuil <hverkuil@xs4all.nl>
* Copyright (C) 2008 Andy Walls <awalls@md.metrocast.net>
*/
#define CX18_DMA_UNMAPPED ((u32) -1)
/* cx18_buffer utility functions */
static inline void cx18_buf_sync_for_cpu(struct cx18_stream *s,
struct cx18_buffer *buf)
{
pci_dma_sync_single_for_cpu(s->cx->pci_dev, buf->dma_handle,
s->buf_size, s->dma);
}
static inline void cx18_buf_sync_for_device(struct cx18_stream *s,
struct cx18_buffer *buf)
{
pci_dma_sync_single_for_device(s->cx->pci_dev, buf->dma_handle,
s->buf_size, s->dma);
}
void _cx18_mdl_sync_for_device(struct cx18_stream *s, struct cx18_mdl *mdl);
static inline void cx18_mdl_sync_for_device(struct cx18_stream *s,
struct cx18_mdl *mdl)
{
if (list_is_singular(&mdl->buf_list))
cx18_buf_sync_for_device(s, list_first_entry(&mdl->buf_list,
struct cx18_buffer,
list));
else
_cx18_mdl_sync_for_device(s, mdl);
}
void cx18_buf_swap(struct cx18_buffer *buf);
void _cx18_mdl_swap(struct cx18_mdl *mdl);
static inline void cx18_mdl_swap(struct cx18_mdl *mdl)
{
if (list_is_singular(&mdl->buf_list))
cx18_buf_swap(list_first_entry(&mdl->buf_list,
struct cx18_buffer, list));
else
_cx18_mdl_swap(mdl);
}
/* cx18_queue utility functions */
struct cx18_queue *_cx18_enqueue(struct cx18_stream *s, struct cx18_mdl *mdl,
struct cx18_queue *q, int to_front);
static inline
struct cx18_queue *cx18_enqueue(struct cx18_stream *s, struct cx18_mdl *mdl,
struct cx18_queue *q)
{
return _cx18_enqueue(s, mdl, q, 0); /* FIFO */
}
static inline
struct cx18_queue *cx18_push(struct cx18_stream *s, struct cx18_mdl *mdl,
struct cx18_queue *q)
{
return _cx18_enqueue(s, mdl, q, 1); /* LIFO */
}
void cx18_queue_init(struct cx18_queue *q);
struct cx18_mdl *cx18_dequeue(struct cx18_stream *s, struct cx18_queue *q);
struct cx18_mdl *cx18_queue_get_mdl(struct cx18_stream *s, u32 id,
u32 bytesused);
void cx18_flush_queues(struct cx18_stream *s);
/* queue MDL reconfiguration helpers */
void cx18_unload_queues(struct cx18_stream *s);
void cx18_load_queues(struct cx18_stream *s);
/* cx18_stream utility functions */
int cx18_stream_alloc(struct cx18_stream *s);
void cx18_stream_free(struct cx18_stream *s);