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

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

#define CX18_DMA_UNMAPPED …

/* cx18_buffer utility functions */

static inline void cx18_buf_sync_for_cpu(struct cx18_stream *s,
	struct cx18_buffer *buf)
{ … }

static inline void cx18_buf_sync_for_device(struct cx18_stream *s,
	struct cx18_buffer *buf)
{ … }

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)
{ … }

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)
{ … }

/* 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)
{ … }

static inline
struct cx18_queue *cx18_push(struct cx18_stream *s, struct cx18_mdl *mdl,
			     struct cx18_queue *q)
{ … }

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);