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.
90 lines
2.8 KiB
C
90 lines
2.8 KiB
C
/* $NetBSD: mpu_eso.c,v 1.17 2011/11/23 23:07:35 jmcneill Exp $ */
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/*
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* Copyright (c) 1998, 2008 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 Lennart Augustsson (augustss@NetBSD.org).
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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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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: mpu_eso.c,v 1.17 2011/11/23 23:07:35 jmcneill Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/errno.h>
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#include <sys/device.h>
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#include <sys/proc.h>
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#include <sys/conf.h>
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#include <sys/audioio.h>
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#include <sys/midiio.h>
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#include <sys/bus.h>
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#include <dev/audio_if.h>
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#include <dev/midi_if.h>
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#include <dev/pci/pcireg.h>
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#include <dev/pci/pcivar.h>
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#include <dev/ic/mpuvar.h>
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#include <dev/pci/esovar.h>
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static int
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mpu_eso_match(device_t parent, cfdata_t match, void *aux)
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{
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struct audio_attach_args *aa = aux;
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struct eso_softc *esc = device_private(parent);
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struct mpu_softc sc;
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if (aa->type != AUDIODEV_TYPE_MPU)
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return 0;
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memset(&sc, 0, sizeof sc);
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sc.ioh = esc->sc_mpu_ioh;
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sc.iot = esc->sc_mpu_iot;
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return mpu_find(&sc);
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}
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static void
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mpu_eso_attach(device_t parent, device_t self, void *aux)
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{
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struct eso_softc *esc = device_private(parent);
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struct mpu_softc *sc = device_private(self);
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aprint_normal("\n");
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sc->ioh = esc->sc_mpu_ioh;
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sc->iot = esc->sc_mpu_iot;
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sc->model = "ESO MPU-401 MIDI UART";
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sc->sc_dev = self;
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sc->lock = &esc->sc_intr_lock;
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mpu_attach(sc);
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}
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CFATTACH_DECL_NEW(mpu_eso, sizeof (struct mpu_softc),
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mpu_eso_match, mpu_eso_attach, NULL, NULL);
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