NetBSD/sys/scsi/ch.c

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1995-01-17 00:31:34 +03:00
/* $NetBSD: ch.c,v 1.14 1995/01/16 21:31:38 mycroft Exp $ */
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/*
* Copyright (c) 1994 Charles Hannum. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Charles Hannum.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
/*
* Originally written by grefen@?????
* Based on scsi drivers by Julian Elischer (julian@tfs.com)
*/
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#include <sys/types.h>
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#include <sys/param.h>
#include <sys/systm.h>
#include <sys/errno.h>
#include <sys/ioctl.h>
#include <sys/buf.h>
#include <sys/proc.h>
#include <sys/user.h>
#include <sys/chio.h>
#include <sys/device.h>
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#include <scsi/scsi_all.h>
#include <scsi/scsi_changer.h>
#include <scsi/scsiconf.h>
#define CHRETRIES 2
#define CHMODE(z) (minor(z) & 0x0f)
#define CHUNIT(z) (minor(z) >> 4)
struct ch_softc {
struct device sc_dev;
struct scsi_link *sc_link; /* all the inter level info */
u_int16_t chmo; /* Offset of first CHM */
u_int16_t chms; /* No. of CHM */
u_int16_t slots; /* No. of Storage Elements */
u_int16_t sloto; /* Offset of first SE */
u_int16_t imexs; /* No. of Import/Export Slots */
u_int16_t imexo; /* Offset of first IM/EX */
u_int16_t drives; /* No. of CTS */
u_int16_t driveo; /* Offset of first CTS */
u_int16_t rot; /* CHM can rotate */
u_long op_matrix; /* possible operations */
u_int16_t lsterr; /* details of lasterror */
u_char stor; /* posible Storage locations */
};
int chmatch __P((struct device *, void *, void *));
void chattach __P((struct device *, struct device *, void *));
struct cfdriver chcd = {
NULL, "ch", chmatch, chattach, DV_DULL, sizeof(struct ch_softc)
};
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/*
* This driver is so simple it uses all the default services
*/
struct scsi_device ch_switch = {
NULL,
NULL,
NULL,
NULL,
};
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struct scsi_inquiry_pattern ch_patterns[] = {
{T_CHANGER, T_REMOV,
"", "", ""},
};
int
chmatch(parent, match, aux)
struct device *parent;
void *match, *aux;
{
struct cfdata *cf = match;
struct scsibus_attach_args *sa = aux;
int priority;
(void)scsi_inqmatch(sa->sa_inqbuf,
(caddr_t)ch_patterns, sizeof(ch_patterns)/sizeof(ch_patterns[0]),
sizeof(ch_patterns[0]), &priority);
return (priority);
}
/*
* The routine called by the low level scsi routine when it discovers
* a device suitable for this driver.
*/
void
chattach(parent, self, aux)
struct device *parent, *self;
void *aux;
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{
struct ch_softc *ch = (void *)self;
struct scsibus_attach_args *sa = aux;
struct scsi_link *sc_link = sa->sa_sc_link;
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SC_DEBUG(sc_link, SDEV_DB2, ("chattach: "));
/*
* Store information needed to contact our base driver
*/
ch->sc_link = sc_link;
sc_link->device = &ch_switch;
sc_link->device_softc = ch;
sc_link->openings = 1;
/*
* Use the subdriver to request information regarding
* the drive. We cannot use interrupts yet, so the
* request must specify this.
*/
if (ch_mode_sense(ch, SCSI_AUTOCONF) != 0)
printf(": offline\n");
else
printf(": %d slot(s), %d drive(s), %d arm(s), %d i/e-slot(s)\n",
ch->slots, ch->drives, ch->chms, ch->imexs);
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}
/*
* open the device.
*/
int
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chopen(dev)
dev_t dev;
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{
int error = 0;
int unit, mode;
struct ch_softc *ch;
struct scsi_link *sc_link;
unit = CHUNIT(dev);
if (unit >= chcd.cd_ndevs)
return ENXIO;
ch = chcd.cd_devs[unit];
if (!ch)
return ENXIO;
mode = CHMODE(dev);
sc_link = ch->sc_link;
SC_DEBUG(sc_link, SDEV_DB1,
("chopen: dev=0x%x (unit %d (of %d))\n", dev, unit, chcd.cd_ndevs));
/*
* Only allow one at a time
*/
if (sc_link->flags & SDEV_OPEN) {
printf("%s: already open\n", ch->sc_dev.dv_xname);
return EBUSY;
}
/*
* Catch any unit attention errors.
*/
if (error = scsi_test_unit_ready(sc_link, SCSI_IGNORE_MEDIA_CHANGE))
goto bad;
sc_link->flags |= SDEV_OPEN; /* unit attn are now errors */
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/*
* Make sure data is loaded
*/
if (error = ch_mode_sense(ch, 0)) {
printf("%s: offline\n", ch->sc_dev.dv_xname);
goto bad;
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}
SC_DEBUG(sc_link, SDEV_DB3, ("open complete\n"));
return 0;
bad:
sc_link->flags &= ~SDEV_OPEN;
return error;
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}
/*
* close the device.. only called if we are the LAST
* occurence of an open device
*/
int
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chclose(dev)
dev_t dev;
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{
struct ch_softc *ch = chcd.cd_devs[CHUNIT(dev)];
SC_DEBUG(ch->sc_link, SDEV_DB1, ("closing\n"));
ch->sc_link->flags &= ~SDEV_OPEN;
return 0;
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}
/*
* Perform special action on behalf of the user
* Knows about the internals of this device
*/
int
chioctl(dev, cmd, arg, mode, p)
dev_t dev;
u_long cmd;
caddr_t arg;
int mode;
struct proc *p;
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{
struct ch_softc *ch = chcd.cd_devs[CHUNIT(dev)];
struct scsi_link *sc_link = ch->sc_link;
int number;
int flags;
/*
* Find the device that the user is talking about
*/
flags = 0; /* give error messages, act on errors etc. */
switch (cmd) {
case CHIOOP: {
struct chop *chop = (struct chop *) arg;
SC_DEBUG(sc_link, SDEV_DB2, ("[chtape_chop: %x]\n",
chop->ch_op));
switch (chop->ch_op) {
case CHGETPARAM:
chop->u.getparam.chmo = ch->chmo;
chop->u.getparam.chms = ch->chms;
chop->u.getparam.sloto = ch->sloto;
chop->u.getparam.slots = ch->slots;
chop->u.getparam.imexo = ch->imexo;
chop->u.getparam.imexs = ch->imexs;
chop->u.getparam.driveo = ch->driveo;
chop->u.getparam.drives = ch->drives;
chop->u.getparam.rot = ch->rot;
chop->result = 0;
return 0;
break;
case CHPOSITION:
return ch_position(ch, &chop->result,
chop->u.position.chm, chop->u.position.to, flags);
case CHMOVE:
return ch_move(ch, &chop->result, chop->u.position.chm,
chop->u.move.from, chop->u.move.to, flags);
case CHGETELEM:
return ch_getelem(ch, &chop->result,
chop->u.get_elem_stat.type,
chop->u.get_elem_stat.from,
&chop->u.get_elem_stat.elem_data, flags);
default:
return EINVAL;
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}
}
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default:
return scsi_do_ioctl(sc_link, dev, cmd, arg, mode, p);
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}
#ifdef DIAGNOSTIC
panic("chioctl: impossible");
#endif
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}
int
ch_getelem(ch, stat, type, from, data, flags)
struct ch_softc *ch;
short *stat;
int type, from;
char *data;
int flags;
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{
struct scsi_read_element_status scsi_cmd;
char elbuf[32];
int error;
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bzero(&scsi_cmd, sizeof(scsi_cmd));
scsi_cmd.opcode = READ_ELEMENT_STATUS;
scsi_cmd.byte2 = type;
scsi_cmd.starting_element_addr[0] = (from >> 8) & 0xff;
scsi_cmd.starting_element_addr[1] = from & 0xff;
scsi_cmd.number_of_elements[1] = 1;
scsi_cmd.allocation_length[2] = 32;
error = scsi_scsi_cmd(ch->sc_link, (struct scsi_generic *) &scsi_cmd,
sizeof(scsi_cmd), (u_char *) elbuf, 32, CHRETRIES, 100000, NULL,
SCSI_DATA_IN | flags);
if (error)
*stat = ch->lsterr;
else
*stat = 0;
bcopy(elbuf + 16, data, 16);
return error;
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}
int
ch_move(ch, stat, chm, from, to, flags)
struct ch_softc *ch;
short *stat;
int chm, from, to, flags;
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{
struct scsi_move_medium scsi_cmd;
int error;
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bzero(&scsi_cmd, sizeof(scsi_cmd));
scsi_cmd.opcode = MOVE_MEDIUM;
scsi_cmd.transport_element_address[0] = (chm >> 8) & 0xff;
scsi_cmd.transport_element_address[1] = chm & 0xff;
scsi_cmd.source_address[0] = (from >> 8) & 0xff;
scsi_cmd.source_address[1] = from & 0xff;
scsi_cmd.destination_address[0] = (to >> 8) & 0xff;
scsi_cmd.destination_address[1] = to & 0xff;
scsi_cmd.invert = (chm & CH_INVERT) ? 1 : 0;
error = scsi_scsi_cmd(ch->sc_link, (struct scsi_generic *) &scsi_cmd,
sizeof(scsi_cmd), NULL, 0, CHRETRIES, 100000, NULL, flags);
if (error)
*stat = ch->lsterr;
else
*stat = 0;
return error;
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}
int
ch_position(ch, stat, chm, to, flags)
struct ch_softc *ch;
short *stat;
int chm, to, flags;
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{
struct scsi_position_to_element scsi_cmd;
int error;
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bzero(&scsi_cmd, sizeof(scsi_cmd));
scsi_cmd.opcode = POSITION_TO_ELEMENT;
scsi_cmd.transport_element_address[0] = (chm >> 8) & 0xff;
scsi_cmd.transport_element_address[1] = chm & 0xff;
scsi_cmd.source_address[0] = (to >> 8) & 0xff;
scsi_cmd.source_address[1] = to & 0xff;
scsi_cmd.invert = (chm & CH_INVERT) ? 1 : 0;
error = scsi_scsi_cmd(ch->sc_link, (struct scsi_generic *) &scsi_cmd,
sizeof(scsi_cmd), NULL, 0, CHRETRIES, 100000, NULL, flags);
if (error)
*stat = ch->lsterr;
else
*stat = 0;
return error;
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}
/*
* Get the scsi driver to send a full inquiry to the
* device and use the results to fill out the global
* parameter structure.
*/
int
ch_mode_sense(ch, flags)
struct ch_softc *ch;
int flags;
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{
struct scsi_mode_sense scsi_cmd;
u_char scsi_sense[128]; /* Can't use scsi_mode_sense_data because of
* missing block descriptor.
*/
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u_char *b;
int i, l;
int error;
struct scsi_link *sc_link = ch->sc_link;
/*
* First check if we have it all loaded
*/
if (sc_link->flags & SDEV_MEDIA_LOADED)
return 0;
/*
* First do a mode sense
*/
bzero(&scsi_cmd, sizeof(scsi_cmd));
scsi_cmd.opcode = MODE_SENSE;
scsi_cmd.byte2 = SMS_DBD;
scsi_cmd.page = 0x3f; /* All Pages */
scsi_cmd.length = sizeof(scsi_sense);
/*
* Read in the pages
*/
if (error = scsi_scsi_cmd(sc_link, (struct scsi_generic *) &scsi_cmd,
sizeof(scsi_cmd), (u_char *) &scsi_sense, sizeof(scsi_sense),
CHRETRIES, 5000, NULL, flags | SCSI_DATA_IN)) {
printf("%s: could not mode sense\n", ch->sc_dev.dv_xname);
return error;
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}
sc_link->flags |= SDEV_MEDIA_LOADED;
l = scsi_sense[0] - 3;
b = &scsi_sense[4];
/*
* To avoid alignment problems
*/
/* XXXX - FIX THIS FOR MSB */
#define p2copy(valp) (valp[1] | (valp[0]<<8)); valp+=2
#define p4copy(valp) (valp[3] | (valp[2]<<8) | (valp[1]<<16) | (valp[0]<<24)); valp+=4
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#if 0
printf("\nmode_sense %d\n", l);
for (i = 0; i < l + 4; i++)
printf("%x%c", scsi_sense[i], i % 8 == 7 ? '\n' : ':');
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printf("\n");
#endif
for (i = 0; i < l;) {
u_char pc = (*b++) & 0x3f;
u_char pl = *b++;
u_char *bb = b;
switch (pc) {
case 0x1d:
ch->chmo = p2copy(bb);
ch->chms = p2copy(bb);
ch->sloto = p2copy(bb);
ch->slots = p2copy(bb);
ch->imexo = p2copy(bb);
ch->imexs = p2copy(bb);
ch->driveo = p2copy(bb);
ch->drives = p2copy(bb);
break;
case 0x1e:
ch->rot = *b & 0x1;
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break;
case 0x1f:
ch->stor = *b & 0xf;
bb += 2;
ch->stor = p4copy(bb);
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break;
default:
break;
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}
b += pl;
i += pl + 2;
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}
SC_DEBUG(sc_link, SDEV_DB2,
(" cht(%d-%d)slot(%d-%d)imex(%d-%d)cts(%d-%d) %s rotate\n",
ch->chmo, ch->chms, ch->sloto, ch->slots, ch->imexo, ch->imexs,
ch->driveo, ch->drives, ch->rot ? "can" : "can't"));
return 0;
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}