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.
115 lines
3.5 KiB
C
115 lines
3.5 KiB
C
/* $NetBSD: cs4231var.h,v 1.10 2011/11/23 23:07:32 jmcneill Exp $ */
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/*-
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* Copyright (c) 1998, 1999 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 Paul Kranenburg.
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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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#ifndef _DEV_IC_CS4231VAR_H_
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#define _DEV_IC_CS4231VAR_H_
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#define AUDIOCS_PROM_NAME "SUNW,CS4231"
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/*
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* List of device memory allocations (see cs4231_malloc/cs4231_free).
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*/
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struct cs_dma {
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struct cs_dma *next;
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void * addr;
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bus_dmamap_t dmamap;
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bus_dma_segment_t segs[1];
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int nsegs;
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size_t size;
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};
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/*
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* DMA transfer to/from CS4231.
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*/
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struct cs_transfer {
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int t_active; /* this transfer is currently active */
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struct cs_dma *t_dma; /* dma memory to transfer from/to */
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vsize_t t_segsz; /* size of the segment */
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vsize_t t_blksz; /* call audio(9) after this many bytes */
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vsize_t t_cnt; /* how far are we into the segment */
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void (*t_intr)(void*); /* audio(9) callback */
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void *t_arg;
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const char *t_name; /* for error/debug messages */
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struct evcnt t_intrcnt;
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struct evcnt t_ierrcnt;
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};
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/*
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* Software state, per CS4231 audio chip.
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*/
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struct cs4231_softc {
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struct ad1848_softc sc_ad1848; /* base device */
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bus_space_tag_t sc_bustag;
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bus_dma_tag_t sc_dmatag;
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struct cs_dma *sc_dmas; /* allocated dma resources */
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struct evcnt sc_intrcnt; /* parent counter */
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struct cs_transfer sc_playback;
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struct cs_transfer sc_capture;
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};
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/*
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* Bus independent code shared by sbus and ebus attachments.
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*/
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void cs4231_common_attach(struct cs4231_softc *, device_t,
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bus_space_handle_t);
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int cs4231_transfer_init(struct cs4231_softc *, struct cs_transfer *,
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bus_addr_t *, bus_size_t *,
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void *, void *, int, void (*)(void *), void *);
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void cs4231_transfer_advance(struct cs_transfer *,
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bus_addr_t *, bus_size_t *);
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/*
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* Bus independent audio(9) methods.
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*/
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int cs4231_open(void *, int);
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void cs4231_close(void *);
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int cs4231_getdev(void *, struct audio_device *);
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int cs4231_set_port(void *, mixer_ctrl_t *);
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int cs4231_get_port(void *, mixer_ctrl_t *);
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int cs4231_query_devinfo(void *, mixer_devinfo_t *);
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int cs4231_get_props(void *);
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void *cs4231_malloc(void *, int, size_t);
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void cs4231_free(void *, void *, size_t);
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#endif /* _DEV_IC_CS4231VAR_H_ */
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