1016 lines
24 KiB
C
1016 lines
24 KiB
C
/* $NetBSD: mt.c,v 1.14 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) 1992, The University of Utah and
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* the Computer Systems Laboratory at the University of Utah (CSL).
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* All rights reserved.
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*
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* Permission to use, copy, modify and distribute this software is hereby
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* granted provided that (1) source code retains these copyright, permission,
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* and disclaimer notices, and (2) redistributions including binaries
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* reproduce the notices in supporting documentation, and (3) all advertising
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* materials mentioning features or use of this software display the following
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* acknowledgement: ``This product includes software developed by the
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* Computer Systems Laboratory at the University of Utah.''
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*
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* THE UNIVERSITY OF UTAH AND CSL ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS
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* IS" CONDITION. THE UNIVERSITY OF UTAH AND CSL DISCLAIM ANY LIABILITY OF
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* ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
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*
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* CSL requests users of this software to return to csl-dist@cs.utah.edu any
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* improvements that they make and grant CSL redistribution rights.
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*
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* Utah $Hdr: mt.c 1.8 95/09/12$
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*/
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/* @(#)mt.c 3.9 90/07/10 mt Xinu
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*
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* Magnetic tape driver (7974a, 7978a/b, 7979a, 7980a, 7980xc)
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* Original version contributed by Mt. Xinu.
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* Modified for 4.4BSD by Mark Davies and Andrew Vignaux, Department of
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* Computer Science, Victoria University of Wellington
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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/callout.h>
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#include <sys/buf.h>
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#include <sys/ioctl.h>
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#include <sys/mtio.h>
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#include <sys/file.h>
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#include <sys/proc.h>
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#include <sys/errno.h>
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#include <sys/syslog.h>
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#include <sys/tty.h>
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#include <sys/kernel.h>
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#include <sys/tprintf.h>
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#include <sys/device.h>
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#include <sys/conf.h>
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#include <hp300/dev/hpibvar.h>
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#include <hp300/dev/mtreg.h>
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struct mtinfo {
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u_short hwid;
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char *desc;
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} mtinfo[] = {
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{ MT7978ID, "7978" },
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{ MT7979AID, "7979A" },
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{ MT7980ID, "7980" },
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{ MT7974AID, "7974A" },
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};
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int nmtinfo = sizeof(mtinfo) / sizeof(mtinfo[0]);
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struct mt_softc {
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struct device sc_dev;
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struct callout sc_start_ch;
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struct callout sc_intr_ch;
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int sc_hpibno; /* logical HPIB this slave it attached to */
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int sc_slave; /* HPIB slave address (0-6) */
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short sc_flags; /* see below */
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u_char sc_lastdsj; /* place for DSJ in mtreaddsj() */
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u_char sc_lastecmd; /* place for End Command in mtreaddsj() */
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short sc_recvtimeo; /* count of hpibsend timeouts to prevent hang */
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short sc_statindex; /* index for next sc_stat when MTF_STATTIMEO */
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struct mt_stat sc_stat;/* status bytes last read from device */
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short sc_density; /* current density of tape (mtio.h format) */
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short sc_type; /* tape drive model (hardware IDs) */
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struct hpibqueue sc_hq; /* HPIB device queue member */
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tpr_t sc_ttyp;
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struct buf_queue sc_tab;/* buf queue */
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int sc_active;
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struct buf sc_bufstore; /* XXX buffer storage */
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};
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#ifdef DEBUG
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int mtdebug = 0;
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#define dlog if (mtdebug) log
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#else
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#define dlog if (0) log
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#endif
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#define UNIT(x) (minor(x) & 3)
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#define B_CMD B_XXX /* command buf instead of data */
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#define b_cmd b_blkno /* blkno holds cmd when B_CMD */
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int mtmatch __P((struct device *, struct cfdata *, void *));
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void mtattach __P((struct device *, struct device *, void *));
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struct cfattach mt_ca = {
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sizeof(struct mt_softc), mtmatch, mtattach
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};
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extern struct cfdriver mt_cd;
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int mtident __P((struct mt_softc *, struct hpibbus_attach_args *));
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void mtustart __P((struct mt_softc *));
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int mtreaddsj __P((struct mt_softc *, int));
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int mtcommand __P((dev_t, int, int));
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void spl_mtintr __P((void *));
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void spl_mtstart __P((void *));
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void mtstart __P((void *));
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void mtgo __P((void *));
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void mtintr __P((void *));
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bdev_decl(mt);
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cdev_decl(mt);
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int
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mtmatch(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 hpibbus_attach_args *ha = aux;
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return (mtident(NULL, ha));
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}
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void
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mtattach(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 mt_softc *sc = (struct mt_softc *)self;
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struct hpibbus_attach_args *ha = aux;
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int unit, hpibno, slave;
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if (mtident(sc, ha) == 0) {
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printf("\n%s: impossible!\n", sc->sc_dev.dv_xname);
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return;
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}
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unit = self->dv_unit;
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hpibno = parent->dv_unit;
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slave = ha->ha_slave;
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BUFQ_INIT(&sc->sc_tab);
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callout_init(&sc->sc_start_ch);
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callout_init(&sc->sc_intr_ch);
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sc->sc_hpibno = hpibno;
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sc->sc_slave = slave;
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sc->sc_flags = MTF_EXISTS;
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/* Initialize hpib job queue entry. */
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sc->sc_hq.hq_softc = sc;
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sc->sc_hq.hq_slave = sc->sc_slave;
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sc->sc_hq.hq_start = mtstart;
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sc->sc_hq.hq_go = mtgo;
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sc->sc_hq.hq_intr = mtintr;
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}
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int
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mtident(sc, ha)
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struct mt_softc *sc;
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struct hpibbus_attach_args *ha;
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{
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int i;
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for (i = 0; i < nmtinfo; i++) {
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if (ha->ha_id == mtinfo[i].hwid) {
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if (sc != NULL) {
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sc->sc_type = mtinfo[i].hwid;
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printf(": %s tape\n", mtinfo[i].desc);
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}
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return (1);
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}
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}
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return (0);
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}
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/*
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* Perform a read of "Device Status Jump" register and update the
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* status if necessary. If status is read, the given "ecmd" is also
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* performed, unless "ecmd" is zero. Returns DSJ value, -1 on failure
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* and -2 on "temporary" failure.
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*/
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int
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mtreaddsj(sc, ecmd)
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struct mt_softc *sc;
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int ecmd;
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{
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int retval;
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if (sc->sc_flags & MTF_STATTIMEO)
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goto getstats;
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retval = hpibrecv(sc->sc_hpibno,
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(sc->sc_flags & MTF_DSJTIMEO) ? -1 : sc->sc_slave,
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MTT_DSJ, &(sc->sc_lastdsj), 1);
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sc->sc_flags &= ~MTF_DSJTIMEO;
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if (retval != 1) {
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dlog(LOG_DEBUG, "%s can't hpibrecv DSJ",
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sc->sc_dev.dv_xname);
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if (sc->sc_recvtimeo == 0)
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sc->sc_recvtimeo = hz;
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if (--sc->sc_recvtimeo == 0)
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return (-1);
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if (retval == 0)
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sc->sc_flags |= MTF_DSJTIMEO;
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return (-2);
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}
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sc->sc_recvtimeo = 0;
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sc->sc_statindex = 0;
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dlog(LOG_DEBUG, "%s readdsj: 0x%x", sc->sc_dev.dv_xname,
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sc->sc_lastdsj);
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sc->sc_lastecmd = ecmd;
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switch (sc->sc_lastdsj) {
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case 0:
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if (ecmd & MTE_DSJ_FORCE)
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break;
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return (0);
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case 2:
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sc->sc_lastecmd = MTE_COMPLETE;
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case 1:
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break;
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default:
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log(LOG_ERR, "%s readdsj: DSJ 0x%x\n", sc->sc_dev.dv_xname,
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sc->sc_lastdsj);
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return (-1);
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}
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getstats:
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retval = hpibrecv(sc->sc_hpibno,
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(sc->sc_flags & MTF_STATCONT) ? -1 : sc->sc_slave,
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MTT_STAT, ((char *)&(sc->sc_stat)) + sc->sc_statindex,
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sizeof(sc->sc_stat) - sc->sc_statindex);
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sc->sc_flags &= ~(MTF_STATTIMEO | MTF_STATCONT);
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if (retval != sizeof(sc->sc_stat) - sc->sc_statindex) {
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if (sc->sc_recvtimeo == 0)
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sc->sc_recvtimeo = hz;
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if (--sc->sc_recvtimeo != 0) {
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if (retval >= 0) {
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sc->sc_statindex += retval;
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sc->sc_flags |= MTF_STATCONT;
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}
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sc->sc_flags |= MTF_STATTIMEO;
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return (-2);
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}
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log(LOG_ERR, "%s readdsj: can't read status",
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sc->sc_dev.dv_xname);
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return (-1);
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}
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sc->sc_recvtimeo = 0;
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sc->sc_statindex = 0;
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dlog(LOG_DEBUG, "%s readdsj: status is %x %x %x %x %x %x",
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sc->sc_dev.dv_xname,
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sc->sc_stat1, sc->sc_stat2, sc->sc_stat3,
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sc->sc_stat4, sc->sc_stat5, sc->sc_stat6);
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if (sc->sc_lastecmd)
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(void) hpibsend(sc->sc_hpibno, sc->sc_slave,
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MTL_ECMD, &(sc->sc_lastecmd), 1);
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return ((int) sc->sc_lastdsj);
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}
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int
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mtopen(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 = UNIT(dev);
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struct mt_softc *sc;
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int req_den;
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int error;
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if (unit >= mt_cd.cd_ndevs ||
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(sc = mt_cd.cd_devs[unit]) == NULL ||
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(sc->sc_flags & MTF_EXISTS) == 0)
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return (ENXIO);
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dlog(LOG_DEBUG, "%s open: flags 0x%x", sc->sc_dev.dv_xname,
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sc->sc_flags);
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if (sc->sc_flags & MTF_OPEN)
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return (EBUSY);
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sc->sc_flags |= MTF_OPEN;
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sc->sc_ttyp = tprintf_open(p);
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if ((sc->sc_flags & MTF_ALIVE) == 0) {
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error = mtcommand(dev, MTRESET, 0);
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if (error != 0 || (sc->sc_flags & MTF_ALIVE) == 0)
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goto errout;
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if ((sc->sc_stat1 & (SR1_BOT | SR1_ONLINE)) == SR1_ONLINE)
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(void) mtcommand(dev, MTREW, 0);
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}
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for (;;) {
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if ((error = mtcommand(dev, MTNOP, 0)) != 0)
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goto errout;
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if (!(sc->sc_flags & MTF_REW))
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break;
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if (tsleep((caddr_t) &lbolt, PCATCH | (PZERO + 1),
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"mt", 0) != 0) {
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error = EINTR;
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goto errout;
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}
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}
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if ((flag & FWRITE) && (sc->sc_stat1 & SR1_RO)) {
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error = EROFS;
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goto errout;
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}
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if (!(sc->sc_stat1 & SR1_ONLINE)) {
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uprintf("%s: not online\n", sc->sc_dev.dv_xname);
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error = EIO;
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goto errout;
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}
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/*
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* Select density:
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* - find out what density the drive is set to
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* (i.e. the density of the current tape)
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* - if we are going to write
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* - if we're not at the beginning of the tape
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* - complain if we want to change densities
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* - otherwise, select the mtcommand to set the density
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*
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* If the drive doesn't support it then don't change the recorded
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* density.
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*
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* The original MOREbsd code had these additional conditions
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* for the mid-tape change
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*
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* req_den != T_BADBPI &&
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* sc->sc_density != T_6250BPI
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*
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* which suggests that it would be possible to write multiple
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* densities if req_den == T_BAD_BPI or the current tape
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* density was 6250. Testing of our 7980 suggests that the
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* device cannot change densities mid-tape.
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*
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* ajv@comp.vuw.ac.nz
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*/
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sc->sc_density = (sc->sc_stat2 & SR2_6250) ? T_6250BPI : (
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(sc->sc_stat3 & SR3_1600) ? T_1600BPI : (
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(sc->sc_stat3 & SR3_800) ? T_800BPI : -1));
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req_den = (dev & T_DENSEL);
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if (flag & FWRITE) {
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if (!(sc->sc_stat1 & SR1_BOT)) {
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if (sc->sc_density != req_den) {
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uprintf("%s: can't change density mid-tape\n",
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sc->sc_dev.dv_xname);
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error = EIO;
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goto errout;
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}
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}
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else {
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int mtset_density =
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(req_den == T_800BPI ? MTSET800BPI : (
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req_den == T_1600BPI ? MTSET1600BPI : (
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req_den == T_6250BPI ? MTSET6250BPI : (
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sc->sc_type == MT7980ID
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? MTSET6250DC
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: MTSET6250BPI))));
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if (mtcommand(dev, mtset_density, 0) == 0)
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sc->sc_density = req_den;
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}
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}
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return (0);
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errout:
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sc->sc_flags &= ~MTF_OPEN;
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return (error);
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}
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int
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mtclose(dev, flag, fmt, p)
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dev_t dev;
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int flag, fmt;
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struct proc *p;
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{
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struct mt_softc *sc = mt_cd.cd_devs[UNIT(dev)];
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if (sc->sc_flags & MTF_WRT) {
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(void) mtcommand(dev, MTWEOF, 2);
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(void) mtcommand(dev, MTBSF, 0);
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}
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if ((minor(dev) & T_NOREWIND) == 0)
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(void) mtcommand(dev, MTREW, 0);
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sc->sc_flags &= ~MTF_OPEN;
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tprintf_close(sc->sc_ttyp);
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return (0);
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}
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int
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mtcommand(dev, cmd, cnt)
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dev_t dev;
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int cmd;
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int cnt;
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{
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struct mt_softc *sc = mt_cd.cd_devs[UNIT(dev)];
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struct buf *bp = &sc->sc_bufstore;
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int error = 0;
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#if 1
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if (bp->b_flags & B_BUSY)
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return (EBUSY);
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#endif
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bp->b_cmd = cmd;
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bp->b_dev = dev;
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do {
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bp->b_flags = B_BUSY | B_CMD;
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mtstrategy(bp);
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biowait(bp);
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if (bp->b_flags & B_ERROR) {
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error = (int) (unsigned) bp->b_error;
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break;
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}
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} while (--cnt > 0);
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#if 0
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bp->b_flags = 0 /*&= ~B_BUSY*/;
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#else
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bp->b_flags &= ~B_BUSY;
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#endif
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return (error);
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}
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/*
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* Only thing to check here is for legal record lengths (writes only).
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*/
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void
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mtstrategy(bp)
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struct buf *bp;
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{
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struct mt_softc *sc;
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int unit;
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int s;
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unit = UNIT(bp->b_dev);
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sc = mt_cd.cd_devs[unit];
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dlog(LOG_DEBUG, "%s strategy", sc->sc_dev.dv_xname);
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if ((bp->b_flags & (B_CMD | B_READ)) == 0) {
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#define WRITE_BITS_IGNORED 8
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#if 0
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if (bp->b_bcount & ((1 << WRITE_BITS_IGNORED) - 1)) {
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tprintf(sc->sc_ttyp,
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"%s: write record must be multiple of %d\n",
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sc->sc_dev.dv_xname, 1 << WRITE_BITS_IGNORED);
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goto error;
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}
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#endif
|
|
s = 16 * 1024;
|
|
if (sc->sc_stat2 & SR2_LONGREC) {
|
|
switch (sc->sc_density) {
|
|
case T_1600BPI:
|
|
s = 32 * 1024;
|
|
break;
|
|
|
|
case T_6250BPI:
|
|
case T_BADBPI:
|
|
s = 60 * 1024;
|
|
break;
|
|
}
|
|
}
|
|
if (bp->b_bcount > s) {
|
|
tprintf(sc->sc_ttyp,
|
|
"%s: write record (%ld) too big: limit (%d)\n",
|
|
sc->sc_dev.dv_xname, bp->b_bcount, s);
|
|
#if 0 /* XXX see above */
|
|
error:
|
|
#endif
|
|
bp->b_flags |= B_ERROR;
|
|
bp->b_error = EIO;
|
|
biodone(bp);
|
|
return;
|
|
}
|
|
}
|
|
s = splbio();
|
|
BUFQ_INSERT_TAIL(&sc->sc_tab, bp);
|
|
if (sc->sc_active == 0) {
|
|
sc->sc_active = 1;
|
|
mtustart(sc);
|
|
}
|
|
splx(s);
|
|
}
|
|
|
|
void
|
|
mtustart(sc)
|
|
struct mt_softc *sc;
|
|
{
|
|
|
|
dlog(LOG_DEBUG, "%s ustart", sc->sc_dev.dv_xname);
|
|
if (hpibreq(sc->sc_dev.dv_parent, &sc->sc_hq))
|
|
mtstart(sc);
|
|
}
|
|
|
|
void
|
|
spl_mtintr(arg)
|
|
void *arg;
|
|
{
|
|
struct mt_softc *sc = arg;
|
|
int s = splbio();
|
|
|
|
hpibppclear(sc->sc_hpibno);
|
|
mtintr(sc);
|
|
(void) splx(s);
|
|
}
|
|
|
|
void
|
|
spl_mtstart(arg)
|
|
void *arg;
|
|
{
|
|
int s = splbio();
|
|
|
|
mtstart(arg);
|
|
(void) splx(s);
|
|
}
|
|
|
|
void
|
|
mtstart(arg)
|
|
void *arg;
|
|
{
|
|
struct mt_softc *sc = arg;
|
|
struct buf *bp;
|
|
short cmdcount = 1;
|
|
u_char cmdbuf[2];
|
|
|
|
dlog(LOG_DEBUG, "%s start", sc->sc_dev.dv_xname);
|
|
sc->sc_flags &= ~MTF_WRT;
|
|
bp = BUFQ_FIRST(&sc->sc_tab);
|
|
if ((sc->sc_flags & MTF_ALIVE) == 0 &&
|
|
((bp->b_flags & B_CMD) == 0 || bp->b_cmd != MTRESET))
|
|
goto fatalerror;
|
|
|
|
if (sc->sc_flags & MTF_REW) {
|
|
if (!hpibpptest(sc->sc_hpibno, sc->sc_slave))
|
|
goto stillrew;
|
|
switch (mtreaddsj(sc, MTE_DSJ_FORCE|MTE_COMPLETE|MTE_IDLE)) {
|
|
case 0:
|
|
case 1:
|
|
stillrew:
|
|
if ((sc->sc_stat1 & SR1_BOT) ||
|
|
!(sc->sc_stat1 & SR1_ONLINE)) {
|
|
sc->sc_flags &= ~MTF_REW;
|
|
break;
|
|
}
|
|
case -2:
|
|
/*
|
|
* -2 means "timeout" reading DSJ, which is probably
|
|
* temporary. This is considered OK when doing a NOP,
|
|
* but not otherwise.
|
|
*/
|
|
if (sc->sc_flags & (MTF_DSJTIMEO | MTF_STATTIMEO)) {
|
|
callout_reset(&sc->sc_start_ch, hz >> 5,
|
|
spl_mtstart, sc);
|
|
return;
|
|
}
|
|
case 2:
|
|
if (bp->b_cmd != MTNOP || !(bp->b_flags & B_CMD)) {
|
|
bp->b_error = EBUSY;
|
|
goto errdone;
|
|
}
|
|
goto done;
|
|
|
|
default:
|
|
goto fatalerror;
|
|
}
|
|
}
|
|
if (bp->b_flags & B_CMD) {
|
|
if (sc->sc_flags & MTF_PASTEOT) {
|
|
switch(bp->b_cmd) {
|
|
case MTFSF:
|
|
case MTWEOF:
|
|
case MTFSR:
|
|
bp->b_error = ENOSPC;
|
|
goto errdone;
|
|
|
|
case MTBSF:
|
|
case MTOFFL:
|
|
case MTBSR:
|
|
case MTREW:
|
|
sc->sc_flags &= ~(MTF_PASTEOT | MTF_ATEOT);
|
|
break;
|
|
}
|
|
}
|
|
switch(bp->b_cmd) {
|
|
case MTFSF:
|
|
if (sc->sc_flags & MTF_HITEOF)
|
|
goto done;
|
|
cmdbuf[0] = MTTC_FSF;
|
|
break;
|
|
|
|
case MTBSF:
|
|
if (sc->sc_flags & MTF_HITBOF)
|
|
goto done;
|
|
cmdbuf[0] = MTTC_BSF;
|
|
break;
|
|
|
|
case MTOFFL:
|
|
sc->sc_flags |= MTF_REW;
|
|
cmdbuf[0] = MTTC_REWOFF;
|
|
break;
|
|
|
|
case MTWEOF:
|
|
cmdbuf[0] = MTTC_WFM;
|
|
break;
|
|
|
|
case MTBSR:
|
|
cmdbuf[0] = MTTC_BSR;
|
|
break;
|
|
|
|
case MTFSR:
|
|
cmdbuf[0] = MTTC_FSR;
|
|
break;
|
|
|
|
case MTREW:
|
|
sc->sc_flags |= MTF_REW;
|
|
cmdbuf[0] = MTTC_REW;
|
|
break;
|
|
|
|
case MTNOP:
|
|
/*
|
|
* NOP is supposed to set status bits.
|
|
* Force readdsj to do it.
|
|
*/
|
|
switch (mtreaddsj(sc,
|
|
MTE_DSJ_FORCE | MTE_COMPLETE | MTE_IDLE)) {
|
|
default:
|
|
goto done;
|
|
|
|
case -1:
|
|
/*
|
|
* If this fails, perform a device clear
|
|
* to fix any protocol problems and (most
|
|
* likely) get the status.
|
|
*/
|
|
bp->b_cmd = MTRESET;
|
|
break;
|
|
|
|
case -2:
|
|
callout_reset(&sc->sc_start_ch, hz >> 5,
|
|
spl_mtstart, sc);
|
|
return;
|
|
}
|
|
|
|
case MTRESET:
|
|
/*
|
|
* 1) selected device clear (send with "-2" secondary)
|
|
* 2) set timeout, then wait for "service request"
|
|
* 3) interrupt will read DSJ (and END COMPLETE-IDLE)
|
|
*/
|
|
if (hpibsend(sc->sc_hpibno, sc->sc_slave, -2, NULL, 0)){
|
|
log(LOG_ERR, "%s can't reset",
|
|
sc->sc_dev.dv_xname);
|
|
goto fatalerror;
|
|
}
|
|
callout_reset(&sc->sc_intr_ch, 4 * hz, spl_mtintr, sc);
|
|
hpibawait(sc->sc_hpibno);
|
|
return;
|
|
|
|
case MTSET800BPI:
|
|
cmdbuf[0] = MTTC_800;
|
|
break;
|
|
|
|
case MTSET1600BPI:
|
|
cmdbuf[0] = MTTC_1600;
|
|
break;
|
|
|
|
case MTSET6250BPI:
|
|
cmdbuf[0] = MTTC_6250;
|
|
break;
|
|
|
|
case MTSET6250DC:
|
|
cmdbuf[0] = MTTC_DC6250;
|
|
break;
|
|
}
|
|
} else {
|
|
if (sc->sc_flags & MTF_PASTEOT) {
|
|
bp->b_error = ENOSPC;
|
|
goto errdone;
|
|
}
|
|
if (bp->b_flags & B_READ) {
|
|
sc->sc_flags |= MTF_IO;
|
|
cmdbuf[0] = MTTC_READ;
|
|
} else {
|
|
sc->sc_flags |= MTF_WRT | MTF_IO;
|
|
cmdbuf[0] = MTTC_WRITE;
|
|
cmdbuf[1] = (bp->b_bcount + ((1 << WRITE_BITS_IGNORED) - 1)) >> WRITE_BITS_IGNORED;
|
|
cmdcount = 2;
|
|
}
|
|
}
|
|
if (hpibsend(sc->sc_hpibno, sc->sc_slave, MTL_TCMD, cmdbuf, cmdcount)
|
|
== cmdcount) {
|
|
if (sc->sc_flags & MTF_REW)
|
|
goto done;
|
|
hpibawait(sc->sc_hpibno);
|
|
return;
|
|
}
|
|
fatalerror:
|
|
/*
|
|
* If anything fails, the drive is probably hosed, so mark it not
|
|
* "ALIVE" (but it EXISTS and is OPEN or we wouldn't be here, and
|
|
* if, last we heard, it was REWinding, remember that).
|
|
*/
|
|
sc->sc_flags &= MTF_EXISTS | MTF_OPEN | MTF_REW;
|
|
bp->b_error = EIO;
|
|
errdone:
|
|
bp->b_flags |= B_ERROR;
|
|
done:
|
|
sc->sc_flags &= ~(MTF_HITEOF | MTF_HITBOF);
|
|
BUFQ_REMOVE(&sc->sc_tab, bp);
|
|
biodone(bp);
|
|
hpibfree(sc->sc_dev.dv_parent, &sc->sc_hq);
|
|
if ((bp = BUFQ_FIRST(&sc->sc_tab)) == NULL)
|
|
sc->sc_active = 0;
|
|
else
|
|
mtustart(sc);
|
|
}
|
|
|
|
/*
|
|
* The Utah code had a bug which meant that the driver was unable to read.
|
|
* "rw" was initialized to bp->b_flags & B_READ before "bp" was initialized.
|
|
* -- ajv@comp.vuw.ac.nz
|
|
*/
|
|
void
|
|
mtgo(arg)
|
|
void *arg;
|
|
{
|
|
struct mt_softc *sc = arg;
|
|
struct buf *bp;
|
|
int rw;
|
|
|
|
dlog(LOG_DEBUG, "%s go", sc->sc_dev.dv_xname);
|
|
bp = BUFQ_FIRST(&sc->sc_tab);
|
|
rw = bp->b_flags & B_READ;
|
|
hpibgo(sc->sc_hpibno, sc->sc_slave, rw ? MTT_READ : MTL_WRITE,
|
|
bp->b_data, bp->b_bcount, rw, rw != 0);
|
|
}
|
|
|
|
void
|
|
mtintr(arg)
|
|
void *arg;
|
|
{
|
|
struct mt_softc *sc = arg;
|
|
struct buf *bp;
|
|
int i;
|
|
u_char cmdbuf[4];
|
|
|
|
bp = BUFQ_FIRST(&sc->sc_tab);
|
|
if (bp == NULL) {
|
|
log(LOG_ERR, "%s intr: bp == NULL", sc->sc_dev.dv_xname);
|
|
return;
|
|
}
|
|
|
|
dlog(LOG_DEBUG, "%s intr", sc->sc_dev.dv_xname);
|
|
|
|
/*
|
|
* Some operation completed. Read status bytes and report errors.
|
|
* Clear EOF flags here `cause they're set once on specific conditions
|
|
* below when a command succeeds.
|
|
* A DSJ of 2 always means keep waiting. If the command was READ
|
|
* (and we're in data DMA phase) stop data transfer first.
|
|
*/
|
|
sc->sc_flags &= ~(MTF_HITEOF | MTF_HITBOF);
|
|
if ((bp->b_flags & (B_CMD|B_READ)) == B_READ &&
|
|
!(sc->sc_flags & (MTF_IO | MTF_STATTIMEO | MTF_DSJTIMEO))){
|
|
cmdbuf[0] = MTE_STOP;
|
|
(void) hpibsend(sc->sc_hpibno, sc->sc_slave, MTL_ECMD,cmdbuf,1);
|
|
}
|
|
switch (mtreaddsj(sc, 0)) {
|
|
case 0:
|
|
break;
|
|
|
|
case 1:
|
|
/*
|
|
* If we're in the middle of a READ/WRITE and have yet to
|
|
* start the data transfer, a DSJ of one should terminate it.
|
|
*/
|
|
sc->sc_flags &= ~MTF_IO;
|
|
break;
|
|
|
|
case 2:
|
|
(void) hpibawait(sc->sc_hpibno);
|
|
return;
|
|
|
|
case -2:
|
|
/*
|
|
* -2 means that the drive failed to respond quickly enough
|
|
* to the request for DSJ. It's probably just "busy" figuring
|
|
* it out and will know in a little bit...
|
|
*/
|
|
callout_reset(&sc->sc_intr_ch, hz >> 5, spl_mtintr, sc);
|
|
return;
|
|
|
|
default:
|
|
log(LOG_ERR, "%s intr: can't get drive stat",
|
|
sc->sc_dev.dv_xname);
|
|
goto error;
|
|
}
|
|
if (sc->sc_stat1 & (SR1_ERR | SR1_REJECT)) {
|
|
i = sc->sc_stat4 & SR4_ERCLMASK;
|
|
log(LOG_ERR, "%s: %s error, retry %d, SR2/3 %x/%x, code %d",
|
|
sc->sc_dev.dv_xname, i == SR4_DEVICE ? "device" :
|
|
(i == SR4_PROTOCOL ? "protocol" :
|
|
(i == SR4_SELFTEST ? "selftest" : "unknown")),
|
|
sc->sc_stat4 & SR4_RETRYMASK, sc->sc_stat2,
|
|
sc->sc_stat3, sc->sc_stat5);
|
|
|
|
if ((bp->b_flags & B_CMD) && bp->b_cmd == MTRESET)
|
|
callout_stop(&sc->sc_intr_ch);
|
|
if (sc->sc_stat3 & SR3_POWERUP)
|
|
sc->sc_flags &= MTF_OPEN | MTF_EXISTS;
|
|
goto error;
|
|
}
|
|
/*
|
|
* Report and clear any soft errors.
|
|
*/
|
|
if (sc->sc_stat1 & SR1_SOFTERR) {
|
|
log(LOG_WARNING, "%s: soft error, retry %d\n",
|
|
sc->sc_dev.dv_xname, sc->sc_stat4 & SR4_RETRYMASK);
|
|
sc->sc_stat1 &= ~SR1_SOFTERR;
|
|
}
|
|
/*
|
|
* We've initiated a read or write, but haven't actually started to
|
|
* DMA the data yet. At this point, the drive's ready.
|
|
*/
|
|
if (sc->sc_flags & MTF_IO) {
|
|
sc->sc_flags &= ~MTF_IO;
|
|
if (hpibustart(sc->sc_hpibno))
|
|
mtgo(sc);
|
|
return;
|
|
}
|
|
/*
|
|
* Check for End Of Tape - we're allowed to hit EOT and then write (or
|
|
* read) one more record. If we get here and have not already hit EOT,
|
|
* return ENOSPC to inform the process that it's hit it. If we get
|
|
* here and HAVE already hit EOT, don't allow any more operations that
|
|
* move the tape forward.
|
|
*/
|
|
if (sc->sc_stat1 & SR1_EOT) {
|
|
if (sc->sc_flags & MTF_ATEOT)
|
|
sc->sc_flags |= MTF_PASTEOT;
|
|
else {
|
|
bp->b_flags |= B_ERROR;
|
|
bp->b_error = ENOSPC;
|
|
sc->sc_flags |= MTF_ATEOT;
|
|
}
|
|
}
|
|
/*
|
|
* If a motion command was being executed, check for Tape Marks.
|
|
* If we were doing data, make sure we got the right amount, and
|
|
* check for hitting tape marks on reads.
|
|
*/
|
|
if (bp->b_flags & B_CMD) {
|
|
if (sc->sc_stat1 & SR1_EOF) {
|
|
if (bp->b_cmd == MTFSR)
|
|
sc->sc_flags |= MTF_HITEOF;
|
|
if (bp->b_cmd == MTBSR)
|
|
sc->sc_flags |= MTF_HITBOF;
|
|
}
|
|
if (bp->b_cmd == MTRESET) {
|
|
callout_stop(&sc->sc_intr_ch);
|
|
sc->sc_flags |= MTF_ALIVE;
|
|
}
|
|
} else {
|
|
i = hpibrecv(sc->sc_hpibno, sc->sc_slave, MTT_BCNT, cmdbuf, 2);
|
|
if (i != 2) {
|
|
log(LOG_ERR, "%s intr: can't get xfer length\n",
|
|
sc->sc_dev.dv_xname);
|
|
goto error;
|
|
}
|
|
i = (int) *((u_short *) cmdbuf);
|
|
if (i <= bp->b_bcount) {
|
|
if (i == 0)
|
|
sc->sc_flags |= MTF_HITEOF;
|
|
bp->b_resid = bp->b_bcount - i;
|
|
dlog(LOG_DEBUG, "%s intr: bcount %ld, resid %ld",
|
|
sc->sc_dev.dv_xname, bp->b_bcount, bp->b_resid);
|
|
} else {
|
|
tprintf(sc->sc_ttyp,
|
|
"%s: record (%d) larger than wanted (%ld)\n",
|
|
sc->sc_dev.dv_xname, i, bp->b_bcount);
|
|
error:
|
|
sc->sc_flags &= ~MTF_IO;
|
|
bp->b_error = EIO;
|
|
bp->b_flags |= B_ERROR;
|
|
}
|
|
}
|
|
/*
|
|
* The operation is completely done.
|
|
* Let the drive know with an END command.
|
|
*/
|
|
cmdbuf[0] = MTE_COMPLETE | MTE_IDLE;
|
|
(void) hpibsend(sc->sc_hpibno, sc->sc_slave, MTL_ECMD, cmdbuf, 1);
|
|
bp->b_flags &= ~B_CMD;
|
|
BUFQ_REMOVE(&sc->sc_tab, bp);
|
|
biodone(bp);
|
|
hpibfree(sc->sc_dev.dv_parent, &sc->sc_hq);
|
|
if (BUFQ_FIRST(&sc->sc_tab) == NULL)
|
|
sc->sc_active = 0;
|
|
else
|
|
mtustart(sc);
|
|
}
|
|
|
|
int
|
|
mtread(dev, uio, flags)
|
|
dev_t dev;
|
|
struct uio *uio;
|
|
int flags;
|
|
{
|
|
struct mt_softc *sc = mt_cd.cd_devs[UNIT(dev)];
|
|
|
|
return(physio(mtstrategy, &sc->sc_bufstore,
|
|
dev, B_READ, minphys, uio));
|
|
}
|
|
|
|
int
|
|
mtwrite(dev, uio, flags)
|
|
dev_t dev;
|
|
struct uio *uio;
|
|
int flags;
|
|
{
|
|
struct mt_softc *sc = mt_cd.cd_devs[UNIT(dev)];
|
|
|
|
return(physio(mtstrategy, &sc->sc_bufstore,
|
|
dev, B_WRITE, minphys, uio));
|
|
}
|
|
|
|
int
|
|
mtioctl(dev, cmd, data, flag, p)
|
|
dev_t dev;
|
|
u_long cmd;
|
|
caddr_t data;
|
|
int flag;
|
|
struct proc *p;
|
|
{
|
|
struct mtop *op;
|
|
int cnt;
|
|
|
|
switch (cmd) {
|
|
case MTIOCTOP:
|
|
op = (struct mtop *)data;
|
|
switch(op->mt_op) {
|
|
case MTWEOF:
|
|
case MTFSF:
|
|
case MTBSR:
|
|
case MTBSF:
|
|
case MTFSR:
|
|
cnt = op->mt_count;
|
|
break;
|
|
|
|
case MTOFFL:
|
|
case MTREW:
|
|
case MTNOP:
|
|
cnt = 0;
|
|
break;
|
|
|
|
default:
|
|
return (EINVAL);
|
|
}
|
|
return (mtcommand(dev, op->mt_op, cnt));
|
|
|
|
case MTIOCGET:
|
|
break;
|
|
|
|
default:
|
|
return (EINVAL);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
/*ARGSUSED*/
|
|
int
|
|
mtdump(dev, blkno, va, size)
|
|
dev_t dev;
|
|
daddr_t blkno;
|
|
caddr_t va;
|
|
size_t size;
|
|
{
|
|
return (ENODEV);
|
|
}
|