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NetBSD/sys/arch/hp300/dev/ac.c

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/* $NetBSD: ac.c,v 1.9 1997/04/02 22:37:21 scottr Exp $ */
/*
* Copyright (c) 1996, 1997 Jason R. Thorpe. All rights reserved.
* Copyright (c) 1991 University of Utah.
* Copyright (c) 1990, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* the Systems Programming Group of the University of Utah Computer
* Science Department.
*
* 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 the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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.
*
* from: Utah $Hdr: ac.c 1.5 92/01/21$
*
* @(#)ac.c 8.2 (Berkeley) 1/12/94
*/
/*
* SCSI driver for MO autochanger.
*
* Very crude. Because of the lack of connect/disconnect support in the
* scsi driver, this driver can tie up the SCSI bus for a long time. It
* also grabs a DMA channel and holds it for the duration even though it
* never uses it.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/buf.h>
#include <sys/device.h>
#include <sys/errno.h>
#include <sys/ioctl.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <hp300/dev/scsireg.h>
#include <hp300/dev/scsivar.h>
#include <hp300/dev/acioctl.h>
#include <hp300/dev/acvar.h>
/* cdev_decl(ac); */
/* XXX we should use macros to do these... */
int acopen __P((dev_t, int, int, struct proc *));
int acclose __P((dev_t, int, int, struct proc *));
int acioctl __P((dev_t, u_long, caddr_t, int, struct proc *));
static int acmatch __P((struct device *, struct cfdata *, void *));
static void acattach __P((struct device *, struct device *, void *));
struct cfattach ac_ca = {
sizeof(struct ac_softc), acmatch, acattach
};
struct cfdriver ac_cd = {
NULL, "ac", DV_DULL
};
void acstart __P((void *));
void acgo __P((void *));
void acintr __P((void *, int));
#ifdef DEBUG
int ac_debug = 0x0000;
#define ACD_FOLLOW 0x0001
#define ACD_OPEN 0x0002
#endif
static int
acmatch(parent, match, aux)
struct device *parent;
struct cfdata *match;
void *aux;
{
struct oscsi_attach_args *osa = aux;
if (osa->osa_inqbuf->type != 8 || osa->osa_inqbuf->qual != 0x80 ||
osa->osa_inqbuf->version != 2)
return (0);
return (1);
}
static void
acattach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct ac_softc *sc = (struct ac_softc *)self;
struct oscsi_attach_args *osa = aux;
printf("\n");
sc->sc_target = osa->osa_target;
sc->sc_lun = osa->osa_lun;
/* Initialize SCSI queue entry. */
sc->sc_sq.sq_softc = sc;
sc->sc_sq.sq_target = sc->sc_target;
sc->sc_sq.sq_lun = sc->sc_lun;
sc->sc_sq.sq_start = acstart;
sc->sc_sq.sq_go = acgo;
sc->sc_sq.sq_intr = acintr;
sc->sc_bp = (struct buf *)malloc(sizeof(struct buf),
M_DEVBUF, M_NOWAIT);
sc->sc_cmd = (struct scsi_fmt_cdb *)malloc(sizeof(struct scsi_fmt_cdb),
M_DEVBUF, M_NOWAIT);
if (sc->sc_bp == NULL || sc->sc_cmd == NULL) {
printf("%s: memory allocation failed\n", sc->sc_dev.dv_xname);
return;
}
sc->sc_flags = ACF_ALIVE;
}
/*ARGSUSED*/
int
acopen(dev, flag, mode, p)
dev_t dev;
int flag, mode;
struct proc *p;
{
int unit = minor(dev);
struct ac_softc *sc;
if (unit >= ac_cd.cd_ndevs ||
(sc = ac_cd.cd_devs[unit]) == NULL ||
(sc->sc_flags & ACF_ALIVE) == 0)
return (ENXIO);
if (sc->sc_flags & ACF_OPEN)
return (EBUSY);
/*
* Since acgeteinfo can block we mark the changer open now.
*/
sc->sc_flags |= ACF_OPEN;
if (acgeteinfo(dev)) {
sc->sc_flags &= ~ACF_OPEN;
return(EIO);
}
return (0);
}
/*ARGSUSED*/
int
acclose(dev, flag, mode, p)
dev_t dev;
int flag, mode;
struct proc *p;
{
struct ac_softc *sc = ac_cd.cd_devs[minor(dev)];
sc->sc_flags &= ~ACF_OPEN;
return (0);
}
#define ACRESLEN(ep) \
(8 + (ep)->nmte*12 + (ep)->nse*12 + (ep)->niee*12 + (ep)->ndte*20)
/*ARGSUSED*/
int
acioctl(dev, cmd, data, flag, p)
dev_t dev;
u_long cmd;
caddr_t data;
int flag;
struct proc *p;
{
struct ac_softc *sc = ac_cd.cd_devs[minor(dev)];
char *dp;
int dlen, error = 0;
switch (cmd) {
default:
return (EINVAL);
/* perform an init element status and mode sense to reset state */
case ACIOCINIT:
error = accommand(dev, ACCMD_INITES, (caddr_t)0, 0);
if (!error)
error = acgeteinfo(dev);
break;
/* copy internal element information */
case ACIOCGINFO:
*(struct acinfo *)data = sc->sc_einfo;
break;
case ACIOCRAWES:
{
struct acbuffer *acbp = (struct acbuffer *)data;
dlen = ACRESLEN(&sc->sc_einfo);
dp = (char *) malloc(dlen, M_DEVBUF, M_WAITOK);
error = accommand(dev, ACCMD_READES, dp, dlen);
if (!error) {
dlen = *(int *)&dp[4] + 8;
if (dlen > acbp->buflen)
dlen = acbp->buflen;
error = copyout(dp, acbp->bufptr, dlen);
}
break;
}
case ACIOCGSTAT:
{
struct acbuffer *acbp = (struct acbuffer *)data;
dlen = ACRESLEN(&sc->sc_einfo);
dp = (char *) malloc(dlen, M_DEVBUF, M_WAITOK);
error = accommand(dev, ACCMD_READES, dp, dlen);
if (!error) {
int ne;
char *tbuf;
ne = sc->sc_einfo.nmte + sc->sc_einfo.nse +
sc->sc_einfo.niee + sc->sc_einfo.ndte;
dlen = ne * sizeof(struct aceltstat);
tbuf = (char *) malloc(dlen, M_DEVBUF, M_WAITOK);
acconvert(dp, tbuf, ne);
if (dlen > acbp->buflen)
dlen = acbp->buflen;
error = copyout(tbuf, acbp->bufptr, dlen);
free(tbuf, M_DEVBUF);
}
free(dp, M_DEVBUF);
break;
}
case ACIOCMOVE:
error = accommand(dev, ACCMD_MOVEM, data,
sizeof(struct acmove));
break;
}
return(error);
}
int
accommand(dev, command, bufp, buflen)
dev_t dev;
int command;
char *bufp;
int buflen;
{
int unit = minor(dev);
struct ac_softc *sc = ac_cd.cd_devs[unit];
struct buf *bp = sc->sc_bp;
struct scsi_fmt_cdb *cmd = sc->sc_cmd;
int error;
#ifdef DEBUG
if (ac_debug & ACD_FOLLOW)
printf("accommand(dev=%x, cmd=%x, buf=%p, buflen=%x)\n",
dev, command, bufp, buflen);
#endif
if (sc->sc_flags & ACF_ACTIVE)
panic("accommand: active!");
sc->sc_flags |= ACF_ACTIVE;
bzero((caddr_t)cmd->cdb, sizeof(cmd->cdb));
cmd->cdb[0] = command;
switch (command) {
case ACCMD_INITES:
cmd->len = 6;
break;
case ACCMD_READES:
cmd->len = 12;
*(short *)&cmd->cdb[2] = 0;
*(short *)&cmd->cdb[4] =
sc->sc_einfo.nmte + sc->sc_einfo.nse +
sc->sc_einfo.niee + sc->sc_einfo.ndte;
cmd->cdb[7] = buflen >> 16;
cmd->cdb[8] = buflen >> 8;
cmd->cdb[9] = buflen;
break;
case ACCMD_MODESENSE:
cmd->len = 6;
cmd->cdb[2] = 0x3F; /* all pages */
cmd->cdb[4] = buflen;
break;
case ACCMD_MOVEM:
cmd->len = 12;
*(short *)&cmd->cdb[2] = sc->sc_picker;
*(short *)&cmd->cdb[4] = *(short *)&bufp[0];
*(short *)&cmd->cdb[6] = *(short *)&bufp[2];
if (*(short *)&bufp[4] & AC_INVERT)
cmd->cdb[10] = 1;
bufp = 0;
buflen = 0;
break;
default:
panic("accommand: bad command");
}
bp->b_flags = B_BUSY|B_READ;
bp->b_dev = dev;
bp->b_un.b_addr = bufp;
bp->b_bcount = buflen;
bp->b_resid = 0;
bp->b_blkno = 0;
bp->b_error = 0;
if (scsireq(sc->sc_dev.dv_parent, &sc->sc_sq))
acstart(sc);
error = biowait(bp);
sc->sc_flags &= ~ACF_ACTIVE;
return (error);
}
void
acstart(arg)
void *arg;
{
struct ac_softc *sc = arg;
#ifdef DEBUG
if (ac_debug & ACD_FOLLOW)
printf("acstart(unit=%x)\n", sc->sc_dev.dv_unit);
#endif
if (scsiustart(sc->sc_dev.dv_parent->dv_unit))
acgo(arg);
}
void
acgo(arg)
void *arg;
{
struct ac_softc *sc = arg;
struct buf *bp = sc->sc_bp;
int stat;
#ifdef DEBUG
if (ac_debug & ACD_FOLLOW)
printf("acgo(unit=%x): ", sc->sc_dev.dv_unit);
#endif
stat = scsigo(sc->sc_dev.dv_parent->dv_unit, sc->sc_target,
sc->sc_lun, bp, sc->sc_cmd, 0);
#ifdef DEBUG
if (ac_debug & ACD_FOLLOW)
printf("scsigo returns %x\n", stat);
#endif
if (stat) {
bp->b_error = EIO;
bp->b_flags |= B_ERROR;
(void) biodone(bp);
scsifree(sc->sc_dev.dv_parent, &sc->sc_sq);
}
}
void
acintr(arg, stat)
void *arg;
int stat;
{
struct ac_softc *sc = arg;
struct buf *bp = sc->sc_bp;
u_char sensebuf[78];
struct scsi_xsense *sp;
#ifdef DEBUG
if (ac_debug & ACD_FOLLOW)
printf("acintr(unit=%x, stat=%x)\n", sc->sc_dev.dv_unit, stat);
#endif
switch (stat) {
case 0:
bp->b_resid = 0;
break;
case STS_CHECKCOND:
scsi_request_sense(sc->sc_dev.dv_parent->dv_unit,
sc->sc_target, sc->sc_lun, sensebuf, sizeof sensebuf);
sp = (struct scsi_xsense *)sensebuf;
printf("%s: acintr sense key=%x, ac=%x, acq=%x\n",
sc->sc_dev.dv_xname, sp->key, sp->info4, sp->len);
bp->b_flags |= B_ERROR;
bp->b_error = EIO;
break;
default:
printf("%s: acintr unknown status 0x%x\n", sc->sc_dev.dv_xname,
stat);
break;
}
(void) biodone(sc->sc_bp);
scsifree(sc->sc_dev.dv_parent, &sc->sc_sq);
}
int
acgeteinfo(dev)
dev_t dev;
{
struct ac_softc *sc = ac_cd.cd_devs[minor(dev)];
char *bp;
char msbuf[48];
int error;
bzero(msbuf, sizeof msbuf);
error = accommand(dev, ACCMD_MODESENSE, msbuf, sizeof msbuf);
if (error)
return(error);
bp = &msbuf[4];
while (bp < &msbuf[48]) {
switch (bp[0] & 0x3F) {
case 0x1D:
sc->sc_einfo = *(struct acinfo *)&bp[2];
sc->sc_picker = sc->sc_einfo.fmte; /* XXX */
return(0);
case 0x1E:
bp += 4;
break;
case 0x1F:
bp += 20;
break;
default:
printf("acgeteinfo: bad page type %x\n", bp[0]);
return(EIO);
}
}
return(EIO);
}
void
acconvert(sbuf, dbuf, ne)
char *sbuf, *dbuf;
int ne;
{
struct aceltstat *ep = (struct aceltstat *)dbuf;
struct ac_restatphdr *phdr;
struct ac_restatdb *dbp;
struct ac_restathdr *hdr;
#ifdef DEBUG
int bcount;
#endif
hdr = (struct ac_restathdr *)&sbuf[0];
sbuf += sizeof *hdr;
#ifdef DEBUG
if (ac_debug & ACD_FOLLOW)
printf("element status: first=%d, num=%d, len=%ld\n",
hdr->ac_felt, hdr->ac_nelt, hdr->ac_bcount);
if (hdr->ac_nelt != ne) {
printf("acconvert: # of elements, %d != %d\n",
hdr->ac_nelt, ne);
if (hdr->ac_nelt < ne)
ne = hdr->ac_nelt;
}
bcount = hdr->ac_bcount;
#endif
while (ne) {
phdr = (struct ac_restatphdr *)sbuf;
sbuf += sizeof *phdr;
#ifdef DEBUG
bcount -= sizeof *phdr;
#endif
dbp = (struct ac_restatdb *)sbuf;
sbuf += phdr->ac_bcount;
#ifdef DEBUG
bcount -= phdr->ac_bcount;
#endif
while (dbp < (struct ac_restatdb *)sbuf) {
ep->type = phdr->ac_type;
ep->eaddr = dbp->ac_eaddr;
ep->flags = 0;
if (dbp->ac_full)
ep->flags |= AC_FULL;
if (dbp->ac_exc)
ep->flags |= AC_ERROR;
if (dbp->ac_acc)
ep->flags |= AC_ACCESS;
dbp = (struct ac_restatdb *)
((char *)dbp + phdr->ac_dlen);
ep++;
ne--;
}
#ifdef DEBUG
if (ne < 0 || bcount < 0)
panic("acconvert: inconsistant");
#endif
}
}
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