linux/drivers/media/pci/cx18/cx18-queue.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 *  cx18 buffer queues
 *
 *  Derived from ivtv-queue.c
 *
 *  Copyright (C) 2007  Hans Verkuil <[email protected]>
 *  Copyright (C) 2008  Andy Walls <[email protected]>
 */

#include "cx18-driver.h"
#include "cx18-queue.h"
#include "cx18-streams.h"
#include "cx18-scb.h"
#include "cx18-io.h"

void cx18_buf_swap(struct cx18_buffer *buf)
{ … }

void _cx18_mdl_swap(struct cx18_mdl *mdl)
{ … }

void cx18_queue_init(struct cx18_queue *q)
{ … }

struct cx18_queue *_cx18_enqueue(struct cx18_stream *s, struct cx18_mdl *mdl,
				 struct cx18_queue *q, int to_front)
{ … }

struct cx18_mdl *cx18_dequeue(struct cx18_stream *s, struct cx18_queue *q)
{ … }

static void _cx18_mdl_update_bufs_for_cpu(struct cx18_stream *s,
					  struct cx18_mdl *mdl)
{ … }

static inline void cx18_mdl_update_bufs_for_cpu(struct cx18_stream *s,
						struct cx18_mdl *mdl)
{ … }

struct cx18_mdl *cx18_queue_get_mdl(struct cx18_stream *s, u32 id,
	u32 bytesused)
{ … }

/* Move all mdls of a queue, while flushing the mdl */
static void cx18_queue_flush(struct cx18_stream *s,
			     struct cx18_queue *q_src, struct cx18_queue *q_dst)
{ … }

void cx18_flush_queues(struct cx18_stream *s)
{ … }

/*
 * Note, s->buf_pool is not protected by a lock,
 * the stream better not have *anything* going on when calling this
 */
void cx18_unload_queues(struct cx18_stream *s)
{ … }

/*
 * Note, s->buf_pool is not protected by a lock,
 * the stream better not have *anything* going on when calling this
 */
void cx18_load_queues(struct cx18_stream *s)
{ … }

void _cx18_mdl_sync_for_device(struct cx18_stream *s, struct cx18_mdl *mdl)
{ … }

int cx18_stream_alloc(struct cx18_stream *s)
{ … }

void cx18_stream_free(struct cx18_stream *s)
{ … }