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1/* SPDX-License-Identifier: GPL-2.0 OR MIT */2 3/*4 * Xen para-virtual sound device5 *6 * Copyright (C) 2016-2018 EPAM Systems Inc.7 *8 * Author: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com>9 */10 11#ifndef __XEN_SND_FRONT_H12#define __XEN_SND_FRONT_H13 14#include "xen_snd_front_cfg.h"15 16struct xen_snd_front_card_info;17struct xen_snd_front_evtchnl;18struct xen_snd_front_evtchnl_pair;19struct xen_front_pgdir_shbuf;20struct xensnd_query_hw_param;21 22struct xen_snd_front_info {23 struct xenbus_device *xb_dev;24 25 struct xen_snd_front_card_info *card_info;26 27 int num_evt_pairs;28 struct xen_snd_front_evtchnl_pair *evt_pairs;29 30 struct xen_front_cfg_card cfg;31};32 33int xen_snd_front_stream_query_hw_param(struct xen_snd_front_evtchnl *evtchnl,34 struct xensnd_query_hw_param *hw_param_req,35 struct xensnd_query_hw_param *hw_param_resp);36 37int xen_snd_front_stream_prepare(struct xen_snd_front_evtchnl *evtchnl,38 struct xen_front_pgdir_shbuf *shbuf,39 u8 format, unsigned int channels,40 unsigned int rate, u32 buffer_sz,41 u32 period_sz);42 43int xen_snd_front_stream_close(struct xen_snd_front_evtchnl *evtchnl);44 45int xen_snd_front_stream_write(struct xen_snd_front_evtchnl *evtchnl,46 unsigned long pos, unsigned long count);47 48int xen_snd_front_stream_read(struct xen_snd_front_evtchnl *evtchnl,49 unsigned long pos, unsigned long count);50 51int xen_snd_front_stream_trigger(struct xen_snd_front_evtchnl *evtchnl,52 int type);53 54#endif /* __XEN_SND_FRONT_H */55