8a962f23f2
the original ad-audiomp branch notes: Add MP locking to the audio drivers. Making the audio drivers MP safe is necessary before efforts can be made to make the VM system MP safe. The are two locks per device instance, an ISR lock and a character device lock. The ISR lock replaces calls to splaudio()/splx(), and will be held across calls to device methods which were called at splaudio() before (e.g. trigger_output). The character device lock is held across calls to nearly all of the methods, excluding some only used for initialization, e.g. get_locks. Welcome to 5.99.57.
231 lines
8.4 KiB
C
231 lines
8.4 KiB
C
/* $NetBSD: audiovar.h,v 1.46 2011/11/23 23:07:31 jmcneill Exp $ */
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/*-
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* Copyright (c) 2002 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by TAMURA Kent
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Copyright (c) 1991-1993 Regents of the University of California.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the Computer Systems
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* Engineering Group at Lawrence Berkeley Laboratory.
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* 4. Neither the name of the University nor of the Laboratory may be used
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* to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* From: Header: audiovar.h,v 1.3 93/07/18 14:07:25 mccanne Exp (LBL)
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*/
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#ifndef _SYS_DEV_AUDIOVAR_H_
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#define _SYS_DEV_AUDIOVAR_H_
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#include <sys/condvar.h>
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#include <dev/audio_if.h>
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/*
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* Initial/default block duration is both configurable and patchable.
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*/
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#ifndef AUDIO_BLK_MS
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#define AUDIO_BLK_MS 50 /* 50 ms */
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#endif
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#ifndef AU_RING_SIZE
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#define AU_RING_SIZE 65536
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#endif
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#define AUMINBUF 512
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#define AUMINBLK 32
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#define AUMINNOBLK 3
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struct audio_ringbuffer {
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audio_stream_t s;
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int blksize; /* I/O block size (bytes) */
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int maxblks; /* no of blocks in ring */
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int usedlow; /* start writer when used falls below this */
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int usedhigh; /* stop writer when used goes above this */
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u_long stamp; /* bytes transferred */
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u_long stamp_last; /* old value of bytes transferred */
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u_long fstamp; /* bytes transferred from/to the buffer near to userland */
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u_long drops; /* missed samples from over/underrun */
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u_long pdrops; /* paused samples */
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bool pause; /* transfer is paused */
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bool copying; /* data is being copied */
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bool needfill; /* buffer needs filling when copying is done */
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bool mmapped; /* device is mmap()-ed */
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};
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#define AUDIO_N_PORTS 4
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struct au_mixer_ports {
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int index; /* index of port-selector mixerctl */
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int master; /* index of master mixerctl */
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int nports; /* number of selectable ports */
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bool isenum; /* selector is enum type */
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u_int allports; /* all aumasks or'd */
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u_int aumask[AUDIO_N_PORTS]; /* exposed value of "ports" */
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u_int misel [AUDIO_N_PORTS]; /* ord of port, for selector */
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u_int miport[AUDIO_N_PORTS]; /* index of port's mixerctl */
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bool isdual; /* has working mixerout */
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int mixerout; /* ord of mixerout, for dual case */
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int cur_port; /* the port that gain actually controls when
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mixerout is selected, for dual case */
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};
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/*
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* Software state, per audio device.
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*/
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struct audio_softc {
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device_t dev;
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void *hw_hdl; /* Hardware driver handle */
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const struct audio_hw_if *hw_if; /* Hardware interface */
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device_t sc_dev; /* Hardware device struct */
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u_char sc_open; /* single use device */
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#define AUOPEN_READ 0x01
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#define AUOPEN_WRITE 0x02
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u_char sc_mode; /* bitmask for RECORD/PLAY */
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struct selinfo sc_wsel; /* write selector */
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struct selinfo sc_rsel; /* read selector */
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pid_t sc_async_audio; /* process who wants audio SIGIO */
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void *sc_sih_rd;
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void *sc_sih_wr;
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struct mixer_asyncs {
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struct mixer_asyncs *next;
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pid_t pid;
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} *sc_async_mixer; /* processes who want mixer SIGIO */
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/* Locks and sleep channels for reading, writing and draining. */
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kmutex_t *sc_intr_lock;
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kmutex_t *sc_lock;
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kcondvar_t sc_rchan;
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kcondvar_t sc_wchan;
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kcondvar_t sc_lchan;
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int sc_dvlock;
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bool sc_dying;
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bool sc_blkset; /* Blocksize has been set */
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uint8_t *sc_sil_start; /* start of silence in buffer */
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int sc_sil_count; /* # of silence bytes */
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bool sc_rbus; /* input DMA in progress */
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bool sc_pbus; /* output DMA in progress */
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/**
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* userland
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* | write(2) & uiomove(9)
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* sc_pstreams[0] <sc_pparams> == sc_pustream;
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* | sc_pfilters[0]
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* sc_pstreams[1] <list_t::filters[n-1].param>
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* :
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* sc_pstreams[n-1] <list_t::filters[1].param>
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* | sc_pfilters[n-1]
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* sc_pr <list_t::filters[0].param>
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* |
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* hardware
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*/
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audio_params_t sc_pparams; /* play encoding parameters */
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audio_stream_t *sc_pustream; /* the first buffer */
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int sc_npfilters; /* number of filters */
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audio_stream_t sc_pstreams[AUDIO_MAX_FILTERS];
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stream_filter_t *sc_pfilters[AUDIO_MAX_FILTERS];
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struct audio_ringbuffer sc_pr; /* Play ring */
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/**
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* hardware
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* |
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* sc_rr <list_t::filters[0].param>
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* | sc_rfilters[0]
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* sc_rstreams[0] <list_t::filters[1].param>
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* | sc_rfilters[1]
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* sc_rstreams[1] <list_t::filters[2].param>
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* :
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* | sc_rfilters[n-1]
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* sc_rstreams[n-1] <sc_rparams> == sc_rustream
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* | uiomove(9) & read(2)
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* userland
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*/
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struct audio_ringbuffer sc_rr; /* Record ring */
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int sc_nrfilters; /* number of filters */
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stream_filter_t *sc_rfilters[AUDIO_MAX_FILTERS];
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audio_stream_t sc_rstreams[AUDIO_MAX_FILTERS];
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audio_stream_t *sc_rustream; /* the last buffer */
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audio_params_t sc_rparams; /* record encoding parameters */
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int sc_eof; /* EOF, i.e. zero sized write, counter */
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u_long sc_wstamp; /* # of bytes read with read(2) */
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u_long sc_playdrop;
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int sc_full_duplex; /* device in full duplex mode */
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struct au_mixer_ports sc_inports, sc_outports;
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int sc_monitor_port;
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#ifdef AUDIO_INTR_TIME
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u_long sc_pfirstintr; /* first time we saw a play interrupt */
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int sc_pnintr; /* number of interrupts */
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u_long sc_plastintr; /* last time we saw a play interrupt */
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long sc_pblktime; /* nominal time between interrupts */
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u_long sc_rfirstintr; /* first time we saw a rec interrupt */
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int sc_rnintr; /* number of interrupts */
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u_long sc_rlastintr; /* last time we saw a rec interrupt */
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long sc_rblktime; /* nominal time between interrupts */
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#endif
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u_int sc_lastgain;
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struct audio_info sc_lastinfo;
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bool sc_lastinfovalid;
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mixer_ctrl_t *sc_mixer_state;
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int sc_nmixer_states;
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};
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#endif /* _SYS_DEV_AUDIOVAR_H_ */
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