542 lines
14 KiB
C
542 lines
14 KiB
C
/* $NetBSD: ac.c,v 1.12 2000/05/19 18:54:31 thorpej Exp $ */
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/*-
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* Copyright (c) 1996, 1997 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 Jason R. Thorpe.
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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 NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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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 University of Utah.
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* Copyright (c) 1990, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* the Systems Programming Group of the University of Utah Computer
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* Science Department.
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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 University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without 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: Utah $Hdr: ac.c 1.5 92/01/21$
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*
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* @(#)ac.c 8.2 (Berkeley) 1/12/94
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*/
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/*
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* SCSI driver for MO autochanger.
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*
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* Very crude. Because of the lack of connect/disconnect support in the
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* scsi driver, this driver can tie up the SCSI bus for a long time. It
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* also grabs a DMA channel and holds it for the duration even though it
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* never uses it.
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/buf.h>
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#include <sys/device.h>
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#include <sys/errno.h>
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#include <sys/ioctl.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <hp300/dev/scsireg.h>
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#include <hp300/dev/scsivar.h>
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#include <hp300/dev/acioctl.h>
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#include <hp300/dev/acvar.h>
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/* cdev_decl(ac); */
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/* XXX we should use macros to do these... */
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int acopen __P((dev_t, int, int, struct proc *));
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int acclose __P((dev_t, int, int, struct proc *));
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int acioctl __P((dev_t, u_long, caddr_t, int, struct proc *));
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static int acmatch __P((struct device *, struct cfdata *, void *));
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static void acattach __P((struct device *, struct device *, void *));
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struct cfattach ac_ca = {
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sizeof(struct ac_softc), acmatch, acattach
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};
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extern struct cfdriver ac_cd;
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void acstart __P((void *));
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void acgo __P((void *));
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void acintr __P((void *, int));
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#ifdef DEBUG
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int ac_debug = 0x0000;
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#define ACD_FOLLOW 0x0001
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#define ACD_OPEN 0x0002
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#endif
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static int
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acmatch(parent, match, aux)
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struct device *parent;
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struct cfdata *match;
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void *aux;
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{
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struct oscsi_attach_args *osa = aux;
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if (osa->osa_inqbuf->type != 8 || osa->osa_inqbuf->qual != 0x80 ||
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osa->osa_inqbuf->version != 2)
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return (0);
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return (1);
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}
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static void
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acattach(parent, self, aux)
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struct device *parent, *self;
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void *aux;
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{
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struct ac_softc *sc = (struct ac_softc *)self;
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struct oscsi_attach_args *osa = aux;
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printf("\n");
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sc->sc_target = osa->osa_target;
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sc->sc_lun = osa->osa_lun;
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/* Initialize SCSI queue entry. */
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sc->sc_sq.sq_softc = sc;
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sc->sc_sq.sq_target = sc->sc_target;
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sc->sc_sq.sq_lun = sc->sc_lun;
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sc->sc_sq.sq_start = acstart;
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sc->sc_sq.sq_go = acgo;
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sc->sc_sq.sq_intr = acintr;
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sc->sc_bp = (struct buf *)malloc(sizeof(struct buf),
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M_DEVBUF, M_NOWAIT);
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sc->sc_cmd = (struct scsi_fmt_cdb *)malloc(sizeof(struct scsi_fmt_cdb),
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M_DEVBUF, M_NOWAIT);
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if (sc->sc_bp == NULL || sc->sc_cmd == NULL) {
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printf("%s: memory allocation failed\n", sc->sc_dev.dv_xname);
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return;
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}
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sc->sc_flags = ACF_ALIVE;
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}
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/*ARGSUSED*/
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int
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acopen(dev, flag, mode, p)
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dev_t dev;
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int flag, mode;
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struct proc *p;
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{
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int unit = minor(dev);
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struct ac_softc *sc;
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if (unit >= ac_cd.cd_ndevs ||
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(sc = ac_cd.cd_devs[unit]) == NULL ||
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(sc->sc_flags & ACF_ALIVE) == 0)
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return (ENXIO);
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if (sc->sc_flags & ACF_OPEN)
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return (EBUSY);
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/*
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* Since acgeteinfo can block we mark the changer open now.
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*/
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sc->sc_flags |= ACF_OPEN;
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if (acgeteinfo(dev)) {
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sc->sc_flags &= ~ACF_OPEN;
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return(EIO);
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}
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return (0);
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}
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/*ARGSUSED*/
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int
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acclose(dev, flag, mode, p)
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dev_t dev;
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int flag, mode;
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struct proc *p;
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{
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struct ac_softc *sc = ac_cd.cd_devs[minor(dev)];
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sc->sc_flags &= ~ACF_OPEN;
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return (0);
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}
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#define ACRESLEN(ep) \
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(8 + (ep)->nmte*12 + (ep)->nse*12 + (ep)->niee*12 + (ep)->ndte*20)
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/*ARGSUSED*/
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int
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acioctl(dev, cmd, data, flag, p)
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dev_t dev;
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u_long cmd;
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caddr_t data;
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int flag;
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struct proc *p;
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{
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struct ac_softc *sc = ac_cd.cd_devs[minor(dev)];
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char *dp;
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int dlen, error = 0;
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switch (cmd) {
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default:
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return (EINVAL);
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/* perform an init element status and mode sense to reset state */
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case ACIOCINIT:
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error = accommand(dev, ACCMD_INITES, (caddr_t)0, 0);
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if (!error)
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error = acgeteinfo(dev);
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break;
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/* copy internal element information */
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case ACIOCGINFO:
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*(struct acinfo *)data = sc->sc_einfo;
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break;
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case ACIOCRAWES:
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{
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struct acbuffer *acbp = (struct acbuffer *)data;
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dlen = ACRESLEN(&sc->sc_einfo);
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dp = (char *) malloc(dlen, M_DEVBUF, M_WAITOK);
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error = accommand(dev, ACCMD_READES, dp, dlen);
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if (!error) {
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dlen = *(int *)&dp[4] + 8;
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if (dlen > acbp->buflen)
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dlen = acbp->buflen;
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error = copyout(dp, acbp->bufptr, dlen);
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}
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break;
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}
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case ACIOCGSTAT:
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{
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struct acbuffer *acbp = (struct acbuffer *)data;
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dlen = ACRESLEN(&sc->sc_einfo);
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dp = (char *) malloc(dlen, M_DEVBUF, M_WAITOK);
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error = accommand(dev, ACCMD_READES, dp, dlen);
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if (!error) {
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int ne;
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char *tbuf;
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ne = sc->sc_einfo.nmte + sc->sc_einfo.nse +
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sc->sc_einfo.niee + sc->sc_einfo.ndte;
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dlen = ne * sizeof(struct aceltstat);
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tbuf = (char *) malloc(dlen, M_DEVBUF, M_WAITOK);
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acconvert(dp, tbuf, ne);
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if (dlen > acbp->buflen)
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dlen = acbp->buflen;
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error = copyout(tbuf, acbp->bufptr, dlen);
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free(tbuf, M_DEVBUF);
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}
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free(dp, M_DEVBUF);
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break;
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}
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case ACIOCMOVE:
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error = accommand(dev, ACCMD_MOVEM, data,
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sizeof(struct acmove));
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break;
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}
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return(error);
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}
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int
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accommand(dev, command, bufp, buflen)
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dev_t dev;
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int command;
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char *bufp;
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int buflen;
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{
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int unit = minor(dev);
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struct ac_softc *sc = ac_cd.cd_devs[unit];
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struct buf *bp = sc->sc_bp;
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struct scsi_fmt_cdb *cmd = sc->sc_cmd;
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int error;
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#ifdef DEBUG
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if (ac_debug & ACD_FOLLOW)
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printf("accommand(dev=%x, cmd=%x, buf=%p, buflen=%x)\n",
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dev, command, bufp, buflen);
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#endif
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if (sc->sc_flags & ACF_ACTIVE)
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panic("accommand: active!");
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sc->sc_flags |= ACF_ACTIVE;
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bzero((caddr_t)cmd->cdb, sizeof(cmd->cdb));
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cmd->cdb[0] = command;
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switch (command) {
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case ACCMD_INITES:
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cmd->len = 6;
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break;
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case ACCMD_READES:
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cmd->len = 12;
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*(short *)&cmd->cdb[2] = 0;
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*(short *)&cmd->cdb[4] =
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sc->sc_einfo.nmte + sc->sc_einfo.nse +
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sc->sc_einfo.niee + sc->sc_einfo.ndte;
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cmd->cdb[7] = buflen >> 16;
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cmd->cdb[8] = buflen >> 8;
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cmd->cdb[9] = buflen;
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break;
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case ACCMD_MODESENSE:
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cmd->len = 6;
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cmd->cdb[2] = 0x3F; /* all pages */
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cmd->cdb[4] = buflen;
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break;
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case ACCMD_MOVEM:
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cmd->len = 12;
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*(short *)&cmd->cdb[2] = sc->sc_picker;
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*(short *)&cmd->cdb[4] = *(short *)&bufp[0];
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*(short *)&cmd->cdb[6] = *(short *)&bufp[2];
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if (*(short *)&bufp[4] & AC_INVERT)
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cmd->cdb[10] = 1;
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bufp = 0;
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buflen = 0;
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break;
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default:
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panic("accommand: bad command");
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}
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bp->b_flags = B_BUSY|B_READ;
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bp->b_dev = dev;
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bp->b_data = bufp;
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bp->b_bcount = buflen;
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bp->b_resid = 0;
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bp->b_blkno = 0;
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bp->b_error = 0;
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if (scsireq(sc->sc_dev.dv_parent, &sc->sc_sq))
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acstart(sc);
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error = biowait(bp);
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sc->sc_flags &= ~ACF_ACTIVE;
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return (error);
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}
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void
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acstart(arg)
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void *arg;
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{
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struct ac_softc *sc = arg;
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#ifdef DEBUG
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if (ac_debug & ACD_FOLLOW)
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printf("acstart(unit=%x)\n", sc->sc_dev.dv_unit);
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#endif
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if (scsiustart(sc->sc_dev.dv_parent->dv_unit))
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acgo(arg);
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}
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void
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acgo(arg)
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void *arg;
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{
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struct ac_softc *sc = arg;
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struct buf *bp = sc->sc_bp;
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int stat;
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#ifdef DEBUG
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if (ac_debug & ACD_FOLLOW)
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printf("acgo(unit=%x): ", sc->sc_dev.dv_unit);
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#endif
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stat = scsigo(sc->sc_dev.dv_parent->dv_unit, sc->sc_target,
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sc->sc_lun, bp, sc->sc_cmd, 0);
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#ifdef DEBUG
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if (ac_debug & ACD_FOLLOW)
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printf("scsigo returns %x\n", stat);
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#endif
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if (stat) {
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bp->b_error = EIO;
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bp->b_flags |= B_ERROR;
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(void) biodone(bp);
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scsifree(sc->sc_dev.dv_parent, &sc->sc_sq);
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}
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}
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void
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acintr(arg, stat)
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void *arg;
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int stat;
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{
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struct ac_softc *sc = arg;
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struct buf *bp = sc->sc_bp;
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u_char sensebuf[78];
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struct scsi_xsense *sp;
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#ifdef DEBUG
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if (ac_debug & ACD_FOLLOW)
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printf("acintr(unit=%x, stat=%x)\n", sc->sc_dev.dv_unit, stat);
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#endif
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switch (stat) {
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case 0:
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bp->b_resid = 0;
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break;
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case STS_CHECKCOND:
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scsi_request_sense(sc->sc_dev.dv_parent->dv_unit,
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sc->sc_target, sc->sc_lun, sensebuf, sizeof sensebuf);
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sp = (struct scsi_xsense *)sensebuf;
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printf("%s: acintr sense key=%x, ac=%x, acq=%x\n",
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sc->sc_dev.dv_xname, sp->key, sp->info4, sp->len);
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bp->b_flags |= B_ERROR;
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bp->b_error = EIO;
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break;
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default:
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printf("%s: acintr unknown status 0x%x\n", sc->sc_dev.dv_xname,
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stat);
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break;
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}
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(void) biodone(sc->sc_bp);
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scsifree(sc->sc_dev.dv_parent, &sc->sc_sq);
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}
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int
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acgeteinfo(dev)
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dev_t dev;
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{
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struct ac_softc *sc = ac_cd.cd_devs[minor(dev)];
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char *bp;
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char msbuf[48];
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int error;
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bzero(msbuf, sizeof msbuf);
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error = accommand(dev, ACCMD_MODESENSE, msbuf, sizeof msbuf);
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if (error)
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return(error);
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bp = &msbuf[4];
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while (bp < &msbuf[48]) {
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switch (bp[0] & 0x3F) {
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case 0x1D:
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sc->sc_einfo = *(struct acinfo *)&bp[2];
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sc->sc_picker = sc->sc_einfo.fmte; /* XXX */
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return(0);
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case 0x1E:
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bp += 4;
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break;
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case 0x1F:
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bp += 20;
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break;
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default:
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printf("acgeteinfo: bad page type %x\n", bp[0]);
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return(EIO);
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}
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}
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return(EIO);
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}
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void
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acconvert(sbuf, dbuf, ne)
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char *sbuf, *dbuf;
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int ne;
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{
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struct aceltstat *ep = (struct aceltstat *)dbuf;
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struct ac_restatphdr *phdr;
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struct ac_restatdb *dbp;
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struct ac_restathdr *hdr;
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#ifdef DEBUG
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int bcount;
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#endif
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hdr = (struct ac_restathdr *)&sbuf[0];
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sbuf += sizeof *hdr;
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#ifdef DEBUG
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if (ac_debug & ACD_FOLLOW)
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printf("element status: first=%d, num=%d, len=%ld\n",
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hdr->ac_felt, hdr->ac_nelt, hdr->ac_bcount);
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if (hdr->ac_nelt != ne) {
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printf("acconvert: # of elements, %d != %d\n",
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hdr->ac_nelt, ne);
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if (hdr->ac_nelt < ne)
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ne = hdr->ac_nelt;
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}
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bcount = hdr->ac_bcount;
|
|
#endif
|
|
while (ne) {
|
|
phdr = (struct ac_restatphdr *)sbuf;
|
|
sbuf += sizeof *phdr;
|
|
#ifdef DEBUG
|
|
bcount -= sizeof *phdr;
|
|
#endif
|
|
dbp = (struct ac_restatdb *)sbuf;
|
|
sbuf += phdr->ac_bcount;
|
|
#ifdef DEBUG
|
|
bcount -= phdr->ac_bcount;
|
|
#endif
|
|
while (dbp < (struct ac_restatdb *)sbuf) {
|
|
ep->type = phdr->ac_type;
|
|
ep->eaddr = dbp->ac_eaddr;
|
|
ep->flags = 0;
|
|
if (dbp->ac_full)
|
|
ep->flags |= AC_FULL;
|
|
if (dbp->ac_exc)
|
|
ep->flags |= AC_ERROR;
|
|
if (dbp->ac_acc)
|
|
ep->flags |= AC_ACCESS;
|
|
dbp = (struct ac_restatdb *)
|
|
((char *)dbp + phdr->ac_dlen);
|
|
ep++;
|
|
ne--;
|
|
}
|
|
#ifdef DEBUG
|
|
if (ne < 0 || bcount < 0)
|
|
panic("acconvert: inconsistant");
|
|
#endif
|
|
}
|
|
}
|