467 lines
12 KiB
C
467 lines
12 KiB
C
/*
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* Copyright (c) 1994 Charles Hannum. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Charles Hannum.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $Id: ch.c,v 1.6 1994/03/29 04:29:25 mycroft Exp $
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*/
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/*
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* Originally written by grefen@?????
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* Based on scsi drivers by Julian Elischer (julian@tfs.com)
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*/
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/errno.h>
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#include <sys/ioctl.h>
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#include <sys/buf.h>
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#include <sys/proc.h>
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#include <sys/user.h>
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#include <sys/chio.h>
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#include <sys/device.h>
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#include <scsi/scsi_all.h>
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#include <scsi/scsi_changer.h>
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#include <scsi/scsiconf.h>
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#define CHRETRIES 2
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#define CHMODE(z) (minor(z) & 0x0f)
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#define CHUNIT(z) (minor(z) >> 4)
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struct ch_data {
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struct device sc_dev;
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u_int32 flags;
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#define CHINIT 0x01
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#define CHOPEN 0x02
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#define CHKNOWN 0x04
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struct scsi_link *sc_link; /* all the inter level info */
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u_int16 chmo; /* Offset of first CHM */
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u_int16 chms; /* No. of CHM */
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u_int16 slots; /* No. of Storage Elements */
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u_int16 sloto; /* Offset of first SE */
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u_int16 imexs; /* No. of Import/Export Slots */
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u_int16 imexo; /* Offset of first IM/EX */
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u_int16 drives; /* No. of CTS */
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u_int16 driveo; /* Offset of first CTS */
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u_int16 rot; /* CHM can rotate */
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u_long op_matrix; /* possible opertaions */
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u_int16 lsterr; /* details of lasterror */
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u_char stor; /* posible Storage locations */
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};
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void chattach __P((struct device *, struct device *, void *));
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struct cfdriver chcd = {
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NULL, "ch", scsi_targmatch, chattach, DV_DULL, sizeof(struct ch_data)
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};
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/*
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* This driver is so simple it uses all the default services
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*/
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struct scsi_device ch_switch = {
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NULL,
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NULL,
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NULL,
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NULL,
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"ch",
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0
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};
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/*
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* The routine called by the low level scsi routine when it discovers
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* a device suitable for this driver.
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*/
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void
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chattach(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 ch_data *ch = (void *)self;
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struct scsi_link *sc_link = aux;
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unsigned char *tbl;
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SC_DEBUG(sc_link, SDEV_DB2, ("chattach: "));
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/*
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* Store information needed to contact our base driver
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*/
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ch->sc_link = sc_link;
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sc_link->device = &ch_switch;
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sc_link->dev_unit = ch->sc_dev.dv_unit;
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/*
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* Use the subdriver to request information regarding
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* the drive. We cannot use interrupts yet, so the
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* request must specify this.
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*/
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if ((ch_mode_sense(ch, SCSI_NOSLEEP | SCSI_NOMASK))) {
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printf(": offline\n");
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/*stat = CHOPEN;*/
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} else {
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printf(": %d slot(s), %d drive(s), %d arm(s), %d i/e-slot(s)\n",
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ch->slots, ch->drives, ch->chms, ch->imexs);
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/*stat = CHKNOWN;*/
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}
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ch->flags |= CHINIT;
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}
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/*
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* open the device.
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*/
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int
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chopen(dev)
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dev_t dev;
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{
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int error = 0;
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int unit, mode;
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struct ch_data *ch;
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struct scsi_link *sc_link;
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unit = CHUNIT(dev);
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mode = CHMODE(dev);
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if (unit >= chcd.cd_ndevs)
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return ENXIO;
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ch = chcd.cd_devs[unit];
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if (!ch || !(ch->flags & CHINIT))
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return ENXIO;
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sc_link = ch->sc_link;
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SC_DEBUG(sc_link, SDEV_DB1, ("chopen: dev=0x%x (unit %d (of %d))\n",
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dev, unit, chcd.cd_ndevs));
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if (ch->flags & CHOPEN)
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return EBUSY;
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/*
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* Catch any unit attention errors.
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*/
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scsi_test_unit_ready(sc_link, SCSI_SILENT);
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sc_link->flags |= SDEV_OPEN;
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/*
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* Check that it is still responding and ok.
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*/
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if (error = (scsi_test_unit_ready(sc_link, 0))) {
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printf("%s: not ready\n", ch->sc_dev.dv_xname);
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sc_link->flags &= ~SDEV_OPEN;
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return error;
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}
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/*
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* Make sure data is loaded
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*/
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if (error = (ch_mode_sense(ch, SCSI_NOSLEEP | SCSI_NOMASK))) {
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printf("%s: offline\n", ch->sc_dev.dv_xname);
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sc_link->flags &= ~SDEV_OPEN;
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return error;
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}
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ch->flags |= CHOPEN;
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return 0;
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}
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/*
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* close the device.. only called if we are the LAST
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* occurence of an open device
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*/
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int
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chclose(dev)
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dev_t dev;
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{
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int unit, mode;
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struct ch_data *ch;
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struct scsi_link *sc_link;
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unit = CHUNIT(dev);
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mode = CHMODE(dev);
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ch = chcd.cd_devs[unit];
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sc_link = ch->sc_link;
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SC_DEBUG(sc_link, SDEV_DB1, ("closing"));
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ch->flags &= ~CHOPEN;
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sc_link->flags &= ~SDEV_OPEN;
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return 0;
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}
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/*
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* Perform special action on behalf of the user
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* Knows about the internals of this device
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*/
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int
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chioctl(dev, cmd, arg, mode)
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dev_t dev;
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int cmd;
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caddr_t arg;
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int mode;
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{
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struct ch_data *ch = chcd.cd_devs[CHUNIT(dev)];
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struct scsi_link *sc_link = ch->sc_link;
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int number;
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u_int flags;
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/*
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* Find the device that the user is talking about
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*/
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flags = 0; /* give error messages, act on errors etc. */
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switch (cmd) {
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case CHIOOP: {
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struct chop *chop = (struct chop *) arg;
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SC_DEBUG(sc_link, SDEV_DB2, ("[chtape_chop: %x]\n",
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chop->ch_op));
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switch (chop->ch_op) {
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case CHGETPARAM:
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chop->u.getparam.chmo = ch->chmo;
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chop->u.getparam.chms = ch->chms;
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chop->u.getparam.sloto = ch->sloto;
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chop->u.getparam.slots = ch->slots;
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chop->u.getparam.imexo = ch->imexo;
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chop->u.getparam.imexs = ch->imexs;
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chop->u.getparam.driveo = ch->driveo;
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chop->u.getparam.drives = ch->drives;
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chop->u.getparam.rot = ch->rot;
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chop->result = 0;
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return 0;
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break;
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case CHPOSITION:
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return ch_position(ch, &chop->result,
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chop->u.position.chm, chop->u.position.to, flags);
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case CHMOVE:
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return ch_move(ch, &chop->result, chop->u.position.chm,
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chop->u.move.from, chop->u.move.to, flags);
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case CHGETELEM:
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return ch_getelem(ch, &chop->result,
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chop->u.get_elem_stat.type,
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chop->u.get_elem_stat.from,
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&chop->u.get_elem_stat.elem_data, flags);
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default:
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return EINVAL;
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}
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}
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default:
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return scsi_do_ioctl(sc_link, cmd, arg, mode);
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}
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#ifdef DIAGNOSTIC
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panic("chioctl: impossible");
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#endif
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}
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int
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ch_getelem(ch, stat, type, from, data, flags)
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struct ch_data *ch;
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short *stat;
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int type, from;
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char *data;
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int flags;
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{
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struct scsi_read_element_status scsi_cmd;
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char elbuf[32];
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int error;
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bzero(&scsi_cmd, sizeof(scsi_cmd));
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scsi_cmd.op_code = READ_ELEMENT_STATUS;
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scsi_cmd.byte2 = type;
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scsi_cmd.starting_element_addr[0] = (from >> 8) & 0xff;
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scsi_cmd.starting_element_addr[1] = from & 0xff;
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scsi_cmd.number_of_elements[1] = 1;
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scsi_cmd.allocation_length[2] = 32;
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error = scsi_scsi_cmd(ch->sc_link, (struct scsi_generic *) &scsi_cmd,
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sizeof(scsi_cmd), (u_char *) elbuf, 32, CHRETRIES, 100000, NULL,
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SCSI_DATA_IN | flags);
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if (error)
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*stat = ch->lsterr;
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else
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*stat = 0;
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bcopy(elbuf + 16, data, 16);
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return error;
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}
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int
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ch_move(ch, stat, chm, from, to, flags)
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struct ch_data *ch;
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short *stat;
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int chm, from, to, flags;
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{
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struct scsi_move_medium scsi_cmd;
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int error;
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bzero(&scsi_cmd, sizeof(scsi_cmd));
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scsi_cmd.op_code = MOVE_MEDIUM;
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scsi_cmd.transport_element_address[0] = (chm >> 8) & 0xff;
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scsi_cmd.transport_element_address[1] = chm & 0xff;
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scsi_cmd.source_address[0] = (from >> 8) & 0xff;
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scsi_cmd.source_address[1] = from & 0xff;
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scsi_cmd.destination_address[0] = (to >> 8) & 0xff;
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scsi_cmd.destination_address[1] = to & 0xff;
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scsi_cmd.invert = (chm & CH_INVERT) ? 1 : 0;
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error = scsi_scsi_cmd(ch->sc_link, (struct scsi_generic *) &scsi_cmd,
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sizeof(scsi_cmd), NULL, 0, CHRETRIES, 100000, NULL, flags);
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if (error)
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*stat = ch->lsterr;
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else
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*stat = 0;
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return error;
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}
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int
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ch_position(ch, stat, chm, to, flags)
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struct ch_data *ch;
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short *stat;
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int chm, to, flags;
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{
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struct scsi_position_to_element scsi_cmd;
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int error;
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bzero(&scsi_cmd, sizeof(scsi_cmd));
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scsi_cmd.op_code = POSITION_TO_ELEMENT;
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scsi_cmd.transport_element_address[0] = (chm >> 8) & 0xff;
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scsi_cmd.transport_element_address[1] = chm & 0xff;
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scsi_cmd.source_address[0] = (to >> 8) & 0xff;
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scsi_cmd.source_address[1] = to & 0xff;
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scsi_cmd.invert = (chm & CH_INVERT) ? 1 : 0;
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error = scsi_scsi_cmd(ch->sc_link, (struct scsi_generic *) &scsi_cmd,
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sizeof(scsi_cmd), NULL, 0, CHRETRIES, 100000, NULL, flags);
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if (error)
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*stat = ch->lsterr;
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else
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*stat = 0;
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return error;
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}
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#ifdef __STDC__
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#define b2tol(a) (((unsigned)(a##_1) << 8) | (unsigned)a##_0)
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#else
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#define b2tol(a) (((unsigned)(a/**/_1) << 8) | (unsigned)a/**/_0)
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#endif
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/*
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* Get the scsi driver to send a full inquiry to the
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* device and use the results to fill out the global
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* parameter structure.
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*/
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int
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ch_mode_sense(ch, flags)
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struct ch_data *ch;
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int flags;
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{
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struct scsi_mode_sense scsi_cmd;
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u_char scsi_sense[128]; /* Can't use scsi_mode_sense_data because of
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* missing block descriptor.
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*/
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u_char *b;
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int i, l;
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int error;
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struct scsi_link *sc_link = ch->sc_link;
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/*
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* First check if we have it all loaded
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*/
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if (sc_link->flags & SDEV_MEDIA_LOADED)
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return 0;
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/*
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* First do a mode sense
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*/
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/* sc_link->flags &= ~SDEV_MEDIA_LOADED; *//*XXX */
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bzero(&scsi_cmd, sizeof(scsi_cmd));
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scsi_cmd.op_code = MODE_SENSE;
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scsi_cmd.byte2 = SMS_DBD;
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scsi_cmd.page = 0x3f; /* All Pages */
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scsi_cmd.length = sizeof(scsi_sense);
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/*
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* Read in the pages
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*/
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error = scsi_scsi_cmd(sc_link, (struct scsi_generic *) &scsi_cmd,
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sizeof(scsi_cmd), (u_char *) &scsi_sense, sizeof(scsi_sense),
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CHRETRIES, 5000, NULL, flags | SCSI_DATA_IN);
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if (error) {
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if (!(flags & SCSI_SILENT))
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printf("%s: could not mode sense\n",
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ch->sc_dev.dv_xname);
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return error;
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}
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sc_link->flags |= SDEV_MEDIA_LOADED;
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l = scsi_sense[0] - 3;
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b = &scsi_sense[4];
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/*
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* To avoid alignment problems
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*/
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/* XXXX - FIX THIS FOR MSB */
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#define p2copy(valp) (valp[1] | (valp[0]<<8)); valp+=2
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#define p4copy(valp) (valp[3] | (valp[2]<<8) | (valp[1]<<16) | (valp[0]<<24)); valp+=4
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#if 0
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printf("\nmode_sense %d\n", l);
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for (i = 0; i < l + 4; i++)
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printf("%x%c", scsi_sense[i], i % 8 == 7 ? '\n' : ':');
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printf("\n");
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#endif
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for (i = 0; i < l;) {
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u_char pc = (*b++) & 0x3f;
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u_char pl = *b++;
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u_char *bb = b;
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switch (pc) {
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case 0x1d:
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ch->chmo = p2copy(bb);
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ch->chms = p2copy(bb);
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ch->sloto = p2copy(bb);
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ch->slots = p2copy(bb);
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ch->imexo = p2copy(bb);
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ch->imexs = p2copy(bb);
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ch->driveo = p2copy(bb);
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ch->drives = p2copy(bb);
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break;
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case 0x1e:
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ch->rot = *b & 0x1;
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break;
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case 0x1f:
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ch->stor = *b & 0xf;
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bb += 2;
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ch->stor = p4copy(bb);
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break;
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default:
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break;
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}
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b += pl;
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i += pl + 2;
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}
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SC_DEBUG(sc_link, SDEV_DB2,
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(" cht(%d-%d)slot(%d-%d)imex(%d-%d)cts(%d-%d) %s rotate\n",
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ch->chmo, ch->chms, ch->sloto, ch->slots, ch->imexo, ch->imexs,
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ch->driveo, ch->drives, ch->rot ? "can" : "can't"));
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return 0;
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}
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