make kernel includes standard

[unix-history] / usr / src / sys / hp300 / dev / ac.c

/*
* Copyright (c) 1991 University of Utah.
* Copyright (c) 1990 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.
*
* %sccs.include.redist.c%
*
* from: Utah $Hdr: ac.c 1.5 92/01/21$
*
*      @(#)ac.c        7.2 (Berkeley) %G%
*/

/*
* 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 "ac.h"
#if NAC > 0

#include <sys/param.h>
#include <sys/buf.h>
#include <sys/errno.h>
#include <sys/user.h>
#include <sys/ioctl.h>
#include <sys/kernel.h>
#include <sys/malloc.h>

#include <hp/dev/device.h>

#include <hp300/dev/scsireg.h>
#include <hp300/dev/acioctl.h>
#include <hp300/dev/acvar.h>

extern int scsi_test_unit_rdy();
extern int scsi_request_sense();
extern int scsiustart();
extern int scsigo();
extern void scsifree();
extern void scsireset();
extern void scsi_delay();

extern int scsi_immed_command();

int     acinit(), acstart(), acgo(), acintr();

struct  driver acdriver = {
       acinit, "ac", acstart, acgo, acintr,
};

struct  ac_softc ac_softc[NAC];
static  struct buf acbuf[NAC];
static  struct scsi_fmt_cdb accmd[NAC];

#ifdef DEBUG
int ac_debug = 0x0000;
#define ACD_FOLLOW      0x0001
#define ACD_OPEN        0x0002
#endif

acinit(hd)
       register struct hp_device *hd;
{
       int unit = hd->hp_unit;
       register struct ac_softc *sc = &ac_softc[unit];

       sc->sc_hd = hd;
       sc->sc_punit = hd->hp_flags & 7;
       if (acident(sc, hd) < 0)
               return(0);
       sc->sc_dq.dq_unit = unit;
       sc->sc_dq.dq_ctlr = hd->hp_ctlr;
       sc->sc_dq.dq_slave = hd->hp_slave;
       sc->sc_dq.dq_driver = &acdriver;
       sc->sc_bp = &acbuf[unit];
       sc->sc_cmd = &accmd[unit];
       sc->sc_flags = ACF_ALIVE;
       return(1);
}

acident(sc, hd)
       register struct ac_softc *sc;
       register struct hp_device *hd;
{
       int unit;
       register int ctlr, slave;
       int i, stat;
       int tries = 5;
       char idstr[32];
       struct scsi_inquiry inqbuf;
       static struct scsi_fmt_cdb inq = {
               6,
               CMD_INQUIRY, 0, 0, 0, sizeof(inqbuf), 0
       };

       ctlr = hd->hp_ctlr;
       slave = hd->hp_slave;
       unit = sc->sc_punit;
       scsi_delay(-1);

       /*
        * See if device is ready
        */
       while ((i = scsi_test_unit_rdy(ctlr, slave, unit)) != 0) {
               if (i == -1 || --tries < 0)
                       /* doesn't exist or not a CCS device */
                       goto failed;
               if (i == STS_CHECKCOND) {
                       u_char sensebuf[128];
                       struct scsi_xsense *sp;

                       scsi_request_sense(ctlr, slave, unit,
                                          sensebuf, sizeof(sensebuf));
                       sp = (struct scsi_xsense *) sensebuf;
                       if (sp->class == 7 && sp->key == 6)
                               /* drive doing an RTZ -- give it a while */
                               DELAY(1000000);
               }
               DELAY(1000);
       }
       /*
        * Find out if it is an autochanger
        */
       if (scsi_immed_command(ctlr, slave, unit, &inq,
                              (u_char *)&inqbuf, sizeof(inqbuf), B_READ))
               goto failed;

       if (inqbuf.type != 8 || inqbuf.qual != 0x80 || inqbuf.version != 2)
               goto failed;

       bcopy((caddr_t)&inqbuf.vendor_id, (caddr_t)idstr, 28);
       for (i = 27; i > 23; --i)
               if (idstr[i] != ' ')
                       break;
       idstr[i+1] = 0;
       for (i = 23; i > 7; --i)
               if (idstr[i] != ' ')
                       break;
       idstr[i+1] = 0;
       for (i = 7; i >= 0; --i)
               if (idstr[i] != ' ')
                       break;
       idstr[i+1] = 0;
       printf("ac%d: %s %s rev %s\n", hd->hp_unit,
              &idstr[0], &idstr[8], &idstr[24]);

       scsi_delay(0);
       return(inqbuf.type);
failed:
       scsi_delay(0);
       return(-1);
}

/*ARGSUSED*/
acopen(dev, flag, mode, p)
       dev_t dev;
       int flag, mode;
       struct proc *p;
{
       register int unit = minor(dev);
       register struct ac_softc *sc = &ac_softc[unit];
       int error = 0;

       if (unit >= NAC || (sc->sc_flags & ACF_ALIVE) == 0)
               error = ENXIO;
       else if (sc->sc_flags & ACF_OPEN)
               error = EBUSY;
       else if (acgeteinfo(dev))
               error = EIO;
       else
               sc->sc_flags |= ACF_OPEN;
       return(error);
}

/*ARGSUSED*/
acclose(dev, flag, mode, p)
       dev_t dev;
       int flag, mode;
       struct proc *p;
{
       struct ac_softc *sc = &ac_softc[minor(dev)];

       sc->sc_flags &= ~ACF_OPEN;
}

#define ACRESLEN(ep)    \
       (8 + (ep)->nmte*12 + (ep)->nse*12 + (ep)->niee*12 + (ep)->ndte*20)

/*ARGSUSED*/
acioctl(dev, cmd, data, flag, p)
       dev_t dev;
       int cmd;
       caddr_t data; 
       int flag;
       struct proc *p;
{
       register struct ac_softc *sc = &ac_softc[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);
}

accommand(dev, command, bufp, buflen)
       dev_t dev;
       int command;
       char *bufp;
       int buflen;
{
       int unit = minor(dev);
       register struct ac_softc *sc = &ac_softc[unit];
       register struct buf *bp = sc->sc_bp;
       register struct scsi_fmt_cdb *cmd = sc->sc_cmd;
       int error;

#ifdef DEBUG
       if (ac_debug & ACD_FOLLOW)
               printf("accommand(dev=%x, cmd=%x, buf=%x, 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_dq))
               acstart(unit);
       error = biowait(bp);
       sc->sc_flags &= ~ACF_ACTIVE;
       return (error);
}

acstart(unit)
       int unit;
{
#ifdef DEBUG
       if (ac_debug & ACD_FOLLOW)
               printf("acstart(unit=%x)\n", unit);
#endif
       if (scsiustart(ac_softc[unit].sc_hd->hp_ctlr))
               acgo(unit);
}

acgo(unit)
       int unit;
{
       register struct ac_softc *sc = &ac_softc[unit];
       register struct buf *bp = sc->sc_bp;
       struct hp_device *hp = sc->sc_hd;
       int stat;

#ifdef DEBUG
       if (ac_debug & ACD_FOLLOW)
               printf("acgo(unit=%x): ", unit);
#endif
       stat = scsigo(hp->hp_ctlr, hp->hp_slave, sc->sc_punit,
                     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_dq);
       }
}

acintr(unit, stat)
       int unit, stat;
{
       register struct ac_softc *sc = &ac_softc[unit];
       register 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", unit, stat);
#endif
       switch (stat) {
       case 0:
               bp->b_resid = 0;
               break;
       case STS_CHECKCOND:
               scsi_request_sense(sc->sc_hd->hp_ctlr, sc->sc_hd->hp_slave,
                                  sc->sc_punit, sensebuf, sizeof sensebuf);
               sp = (struct scsi_xsense *)sensebuf;
               printf("ac%d: acintr sense key=%x, ac=%x, acq=%x\n",
                      unit, sp->key, sp->info4, sp->len);
               bp->b_flags |= B_ERROR;
               bp->b_error = EIO;
               break;
       default:
               printf("ac%d: acintr unknown status 0x%x\n", unit, stat);
               break;
       }
       (void) biodone(sc->sc_bp);
       scsifree(&sc->sc_dq);
}

acgeteinfo(dev)
       dev_t dev;
{
       register struct ac_softc *sc = &ac_softc[minor(dev)];
       register 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);
}

acconvert(sbuf, dbuf, ne)
       char *sbuf, *dbuf;
       int ne;
{
       register struct aceltstat *ep = (struct aceltstat *)dbuf;
       register struct ac_restatphdr *phdr;
       register struct ac_restatdb *dbp;
       struct ac_restathdr *hdr;
#ifdef DEBUG
       register 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=%d\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
       }
}
#endif