mirror of
https://gitee.com/openharmony/kernel_linux
synced 2024-11-27 07:11:26 +00:00
d6e0fbb82e
Implement shared buffer handling according to the para-virtualized sound device protocol at xen/interface/io/sndif.h: - manage buffer memory - handle granted references - handle page directories [ Fixed missing linux/kernel.h inclusion -- tiwai ] Signed-off-by: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
37 lines
844 B
C
37 lines
844 B
C
/* SPDX-License-Identifier: GPL-2.0 OR MIT */
|
|
|
|
/*
|
|
* Xen para-virtual sound device
|
|
*
|
|
* Copyright (C) 2016-2018 EPAM Systems Inc.
|
|
*
|
|
* Author: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com>
|
|
*/
|
|
|
|
#ifndef __XEN_SND_FRONT_SHBUF_H
|
|
#define __XEN_SND_FRONT_SHBUF_H
|
|
|
|
#include <xen/grant_table.h>
|
|
|
|
#include "xen_snd_front_evtchnl.h"
|
|
|
|
struct xen_snd_front_shbuf {
|
|
int num_grefs;
|
|
grant_ref_t *grefs;
|
|
u8 *directory;
|
|
u8 *buffer;
|
|
size_t buffer_sz;
|
|
};
|
|
|
|
grant_ref_t xen_snd_front_shbuf_get_dir_start(struct xen_snd_front_shbuf *buf);
|
|
|
|
int xen_snd_front_shbuf_alloc(struct xenbus_device *xb_dev,
|
|
struct xen_snd_front_shbuf *buf,
|
|
unsigned int buffer_sz);
|
|
|
|
void xen_snd_front_shbuf_clear(struct xen_snd_front_shbuf *buf);
|
|
|
|
void xen_snd_front_shbuf_free(struct xen_snd_front_shbuf *buf);
|
|
|
|
#endif /* __XEN_SND_FRONT_SHBUF_H */
|